CN109261896A - A kind of casting sand mould and pouring procedure of herbage collecting mechanical arc needle - Google Patents
A kind of casting sand mould and pouring procedure of herbage collecting mechanical arc needle Download PDFInfo
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- CN109261896A CN109261896A CN201811368246.9A CN201811368246A CN109261896A CN 109261896 A CN109261896 A CN 109261896A CN 201811368246 A CN201811368246 A CN 201811368246A CN 109261896 A CN109261896 A CN 109261896A
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- 239000004576 sand Substances 0.000 title claims abstract description 161
- 238000005266 casting Methods 0.000 title claims abstract description 107
- 238000000034 method Methods 0.000 title claims description 22
- 238000004382 potting Methods 0.000 claims abstract description 42
- 239000006188 syrup Substances 0.000 claims abstract description 42
- 235000020357 syrup Nutrition 0.000 claims abstract description 42
- 238000003860 storage Methods 0.000 claims abstract description 4
- 238000009434 installation Methods 0.000 claims description 11
- 230000010006 flight Effects 0.000 claims description 3
- 230000008901 benefit Effects 0.000 claims description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 44
- 229910052742 iron Inorganic materials 0.000 description 22
- 230000007547 defect Effects 0.000 description 10
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- 230000008859 change Effects 0.000 description 4
- 239000004020 conductor Substances 0.000 description 4
- 241001391944 Commicarpus scandens Species 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 230000000149 penetrating effect Effects 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 238000007528 sand casting Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 238000012797 qualification Methods 0.000 description 2
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- 239000000919 ceramic Substances 0.000 description 1
- 230000009194 climbing Effects 0.000 description 1
- RKTYLMNFRDHKIL-UHFFFAOYSA-N copper;5,10,15,20-tetraphenylporphyrin-22,24-diide Chemical compound [Cu+2].C1=CC(C(=C2C=CC([N-]2)=C(C=2C=CC=CC=2)C=2C=CC(N=2)=C(C=2C=CC=CC=2)C2=CC=C3[N-]2)C=2C=CC=CC=2)=NC1=C3C1=CC=CC=C1 RKTYLMNFRDHKIL-UHFFFAOYSA-N 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/08—Features with respect to supply of molten metal, e.g. ingates, circular gates, skim gates
- B22C9/082—Sprues, pouring cups
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/10—Cores; Manufacture or installation of cores
- B22C9/103—Multipart cores
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/20—Stack moulds, i.e. arrangement of multiple moulds or flasks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/22—Moulds for peculiarly-shaped castings
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
The present invention provides the casting sand mould and casting craft of a kind of herbage collecting mechanical arc needle, the casting sand mould includes shell, the upper housing is arcuate structure, and the arcuate structure is equipped with the first sprue, and first sprue is communicated with the pouring cup of storage potting syrup；Lower case, the lower case are to be equipped with the matched arcuate structure of the upper housing, the lower case and the described first main running channel corresponding position and run through the main running channel of lower case upper and lower ends second；After the upper housing and lower case fasten, at least one type chamber is formed, the type chamber is arc, and first sprue and the second sprue are communicated with the type chamber, forms arc needle casting after the type chamber casting；Core assembly, the core assembly is intracavitary set on type, forms arc needle casting for secondary cavity.The present invention is changed to stack-type from stack-type, while increasing subsidy channel, when casting, reduces sand using amount, improve yield rate by changing sand mold shape.
Description
Technical field
The present invention relates to handwheel manufacture production field more particularly to a kind of casting sand moulds of herbage collecting mechanical arc needle
And casting side.
Background technique
Precoated sand casting technique is one kind of the resin sand in sand casting, the casting manufactured using precoated sand casting technique
Small with surface roughness, dimensional accuracy is high, the good feature of quality.
In the prior art, arc needle technique is precoated sand stack-type, i.e. sand mold two sides is all apperance, referring to shown in attached drawing 1-4,
It is mainly horizontal parting, vertically penetrates sand, and apperance Inner arc is opposite to put, and an intermediate sprue gives that two arcs are horizontal to be poured
Road, two arc cross gates are moved towards with two apperance inner arcs, and cross gate is connected with casting by four ingates, and ingate is in interior
Arc middle position, external arc guide groove and thimble stomidium are formed by fuse.Due to being stack-type structure, sand mold is thicker, during shell processed is
Between precoated sand be not easy to solidify, the time that causes to be heating and curing is longer, power-consuming, and intensity is low；Sand using amount is big, and (placer iron ratio is greater than
5.2), at high cost, sand mold weight is big, about 31.4Kg, operative employee's large labor intensity when leading to shell processed and installing additional, shell processed and installation
Low efficiency.Meanwhile mo(u)ld top half sand mold is penetrated not firm, and sand mold is caused to need to repair too many, increasing cost reduces efficiency, have an effect on casting at
Product rate.External arc guide groove and pin hole are made of a whole fuse, and fuse is longer, are easily broken off and penetrate not firm, fuse yield rate
It is low.Running gate system is made of two arc cross gates and secondary cross gate, a sprue and four ingates, running gate system iron
Water is big, causes product yield low, higher cost.
In traditional handicraft, arc needle is produced using stack-type technique, and a stack-type sand mold upper and lower surface all has forming cavity,
Complete cast molding chamber is formed after the cooperation of every two sand mold, each cast molding chamber can make two arc needles；Wherein lead
Running channel is set to the center of sand mold, the arc cross gate of two sides is flowed to by sprue, then by four equidistant on arc cross gate
Ingate flows to cast molding chamber.
The design of above-mentioned running channel allows for the shape and structure of arc needle, if directly casting from both ends, casting
The dynamic distance of liquid stream, temperature difference is big, and carrying out feeding when feeding not in time, causes casting molding bad.
Above-mentioned sand mold design has no the problem in principle when casting of metals, but the size of visible sand mold is larger,
The ratio of running channel and cast molding chamber is big, first is that placer iron is than big, raw material dosage is big, second is that sand mold size is big, needs when making sand mold
Will bigger energy consumption solidified, while being easy to appear and penetrating the not firm problem of sand, third is that running channel volume is big, waste more.
In second point in the above problem, sand mold size is big, and sand mold production qualification rate is low, after the sightless defect of naked eyes
It will lead to that casting quality is bad the phase, furthermore the requirement of energy consumption and peripheral equipment is high；In the above problem thirdly in, running channel
Volume is big, and casting liquid waste is more, at high cost.
For problem of the prior art, it is desirable to be solved by proposing the sand mold of a kind of combination stack-type technique and shell mold technical operation
Above-mentioned two problems.
Summary of the invention
The purpose of the present invention is to provide a kind of reduction arenaceous shell sand mold sizes, optimization running channel design, reach the sand mold system of raising
Make yields, improve casting quality, lowers running channel volume, reduce cost
To achieve the goals above, use following technical scheme of the invention is achieved:
A kind of casting sand mould of herbage collecting mechanical arc needle, comprising:
Upper housing, the upper housing are arcuate structure, and the arcuate structure is equipped with the through the upper housing upper and lower ends
One sprue, first sprue are communicated with the pouring cup of storage potting syrup；
Lower case, the lower case are and the matched arcuate structure of the upper housing, the lower case and the described first main running channel
Corresponding position, which is equipped with, runs through the main running channel of lower case upper and lower ends second；
After the upper housing and lower case fasten, form at least one type chamber, the type chamber is arc, first sprue with
And second sprue communicated with the type chamber, form arc needle casting after type chamber casting；
Core assembly, the width of the core assembly is less than the width of the type chamber, and the core assembly is intracavitary set on type, uses
Arc needle casting is formed in secondary cavity；
The maximum gauge of the core assembly is 10mm-14mm.
Further, the type chamber is made up of the lower case, is provided with along the radian direction of the lower case and institute
The cross gate of arc is stated, the cross gate is communicated with second sprue, and the two sides of the cross gate are respectively equipped with structure phase
With type chamber group, the type chamber group includes the parallel type chamber of several camber lines, each type chamber with the cross gate phase
It is logical.In the present solution, after being changed to shell mould, using lower case as the forming cavity of casting, upper housing is the sand mold back side, avoids that penetrate sand not firm
Defect, even if having once in a while penetrate the not firm situation of sand only overleaf, not in apperance face, do not influence casting, significantly improve sand mold
With the yield rate of casting；And at least two type chamber is formed directly in lower case, it can once be poured at least two casting, efficiency
It is high.
Further, the cross gate is equipped with several sprue gates, the two sides at each sprue gate and close cross gate
The type chamber of two sides is connected to.By increasing ingate, casting efficiency is improved, while ingate can will be with cross gate apart from farther away
Type chamber is poured.
It further, further include subsidy channel, the subsidy channel is located at ingate end, and close to the lower case of arc
The center of circle direction setting.When casting, the type chamber close to center of circle direction is relatively thin, and potting syrup flowing is slower, and inflow is few, passes through subsidy
The defects of channel, inflow increase, cold shut solves.
Further, the subsidy channel is hierarchic structure, and the hierarchic structure includes several flights.Ladder-like knot
Structure, molten iron flow into lower from eminence transition, and subsidy effect is good, and by step-like structure, can fill and lead up casting weight loss groove,
Increase iron water amount.
Further, the core assembly includes the first fuse, the second fuse and third fuse, and first fuse is set
In one end of the type chamber of arc, second fuse connect the fuse to form arc with third fuse, and it is intracavitary to be placed in type, and described
Two fuse ends are equipped with columnar projections, and the columnar projections are placed in the other end of the type chamber of the arc.For matching product
Structure increases core assembly；In the prior art, arc fuse is one, in the present solution, fuse is become two from one, energy
High yield rate when fuse production is enough improved, not easy to break, fuse is short, penetrates sand reality.
Further, second fuse end is equipped with boss, and one end that the third fuse is connect with the second fuse is set
There is the shrinkage pool with boss cooperation, when second fuse is connect with third fuse, the boss is inserted into the shrinkage pool.Pass through
Boss is connect with shrinkage pool, it is ensured that the formation of arc fuse.
A kind of pouring procedure of herbage collecting mechanical arc needle provided by the invention, uses the casting sand that right is above-mentioned
Type, comprising the following steps:
The installation of sand mold component: it is intracavitary that core assembly is placed in type, takes upper housing to be installed in lower case, type chamber is located at sand mold component
It is interior；The second sprue Matching installation on the first sprue and lower case when installation, on upper housing；
Casting: potting syrup is flowed into the first sprue and the second sprue by pouring cup, intracavitary subsequently into type, so that type chamber
Inside at least form an arc needle product；
Arc needle product takes out: dismantling upper housing and lower case, takes out the complete product of castable.
Further, the casting step specifically:
Potting syrup is flowed into the first sprue and the second sprue by pouring cup, and it is intracavitary by ingate to flow into each type,
So that each type is intracavitary at least to form an arc needle product.
It further, further include teeming step after the casting step step, the teeming step specifically:
By subsidizing channel, potting syrup carries out subsidy casting to the type chamber group in the center of circle direction of the lower case close to arc.
By teeming, increase inflow, convenient for forming complete cast product.
Beneficial effects of the present invention are as follows:
In the present invention, since upper housing is matched with the arc of lower case, i.e. the bending direction of the two is identical, from opposite arc before
Shape is changed to arc in the same direction, reduces the volume of running channel, and potting syrup flow distance is short, and temperature difference is big, can timely feeding, improve
Casting ratio of briquetting.
In the present invention, casting sand mold is changed to shell mould from stack-type, reduces sand ratio, and the thickness of casting sand mold is reduced, old sand mold
Maximum gauge is 67.7mm, and the maximum gauge of shell sand type is 12mm after improving, and reduces sand using amount, improves casting efficiency.
In the present invention, potting syrup is directly entered the type chamber of arc by sprue, and needs to pass through arc in the prior art
Cross gate, secondary cross gate, ingate etc. are compared, and potting syrup circulation path is short, and circulation is fast, and iron water amount is few, and yield rate is high.
Detailed description of the invention
Fig. 1 is a kind of this structural schematic diagram of the sand mold of herbage collecting mechanical arc needle in the prior art；
Fig. 2 is one of assembling figure of sand mold of the prior art；
Fig. 3 is the two of the assembling figure of the sand mold of the prior art；
Fig. 4 is the three of the assembling figure of the sand mold of the prior art；
Fig. 5 is a kind of structural schematic diagram of the casting sand mould of herbage collecting mechanical arc needle provided by the invention；
Fig. 6 is one of the structural schematic diagram of upper housing provided by the invention；
Fig. 7 is the second structural representation of upper housing provided by the invention；
Fig. 8 is one of the structural schematic diagram of lower case provided by the invention；
Fig. 9 is the second structural representation of lower case provided by the invention；
Figure 10 is the structural schematic diagram of fuse provided by the invention；
Figure 11 is the top view of the second fuse provided by the invention；
In figure: 1, upper housing；2, lower case；3, core assembly；301, the first fuse；302, the second fuse；303, third fuse；
4, the first sprue；5, the second sprue；6, type chamber；7, ingate；8, channel is subsidized；9, cross gate；10, boss；11, recessed
Hole；12, column is fastened；13, buckling groove；14, supporting rib；15, lightening recesses；16, positioning convex platform；17, positioning groove；18, core print；
19, core platform；
100, sand mold；200, sprue；300, secondary cross gate；400, arc cross gate.
Specific embodiment
Reach the technical means and efficacy that predetermined purpose is taken for the present invention is further explained, below in conjunction with attached drawing and reality
Example is applied to a specific embodiment of the invention, structure feature and its effect, detailed description are as follows.
Embodiment 1
Referring to shown in attached drawing 5-11, the casting sand mould of one of the present embodiment herbage collecting mechanical arc needle, including upper casing
Body 1, lower case 2 and core assembly 3, specifically, due to the change of arc needle construction, core assembly 3 is used in the intracavitary benefit of type
Fill certain a part that shape forming cavity cannot be formed.Referring to shown in attached drawing 6-7 it is found that specifically, the upper housing 1 in the present embodiment is
Arcuate structure, the arcuate structure decurvation, certainly, being bent downwardly is that in contrast, can also be bent upwards, according to arc
The curvature of shape needle determines the curvature of shell.In the present embodiment, the first sprue 4 is set in the middle position of arcuate structure,
First sprue 4 runs through the upper and lower ends of upper housing 1, and the first sprue 4 is communicated with the pouring cup of storage potting syrup；
It is found that the lower case 2 of the present embodiment is and the matched arcuate structure of upper housing 1, the present embodiment referring to shown in attached drawing 8-9
In, i.e., lower case 2 is also decurvation, while the second sprue 5 is arranged with 4 corresponding position of the first sprue in lower case 2,
Second sprue 5 runs through the upper and lower ends of lower case 2, when casting, blocks 5 lower part of the second sprue, carries out the flowing of potting syrup.
In the present embodiment, after upper housing 1 and the fastening of lower case 2, forms at least type chamber 6, type chamber 6 and be located at the matched arc knot of arc needle
Structure, first sprue 4 and the second sprue 5 are communicated with the type chamber 6, and type chamber 6 forms arc needle casting after being poured；
Referring to shown in attached drawing 5, in the present embodiment, for fitting-type chamber 6, it is additionally provided with core assembly 3, the width of the core assembly 3
Degree is less than the width of the type chamber 6, and core assembly 3 is set in type chamber 6, forms arc needle casting for secondary cavity 6.This reality
It applies in example, for example arc needle casting needs pin hole, then needs in core assembly 3 a cylindricality component to be placed in 6 one end of type chamber and formed,
It is poroid when taking away cylindricality component that potting syrup gets around cylindricality component herein；And when the middle position of arc needle casting is equipped with arc
When shape groove body, curved components are set in the core assembly 3 in the present embodiment, are placed in type chamber 6, after casting, curved components are taken
Fall, since remaining position through potting syrup forms casting in type chamber 6, therefore places the position of curved components in type chamber 6, do not enter into and pour
Fluid injection then forms arc groove body.
In the present embodiment, the formation of type chamber 6 has Three models:
The first, is directly formed by the lower part of upper housing 1, when casting, simultaneously by the first sprue 4 and the second sprue 5
Type chamber 6 on upper housing 1 is poured, core assembly 3 is cooperated, forms arc needle casting；
It second, is formed by the top of lower case 2, is then by the first sprue 4 and the second sprue 5 while under at this time
Type chamber 6 on shell 2 is poured,.
The third, is collectively formed by upper housing 1 and lower case 2, i.e. a part of lower part for being located at upper housing 1 of type chamber 6,
A part be located at lower case 2 top, the two fasten, form complete type chamber 6, at this time potting syrup by the first sprue 4 with
And common realize of the second sprue 5 is poured, and cooperates core assembly 3, forms arc needle casting.
In the present embodiment, the maximum gauge of core assembly 3 is 10-14mm, and optimal is 12mm.With in the prior art with a thickness of
29.8mm is compared, and thickness is substantially reduced.
Embodiment 2
As the further improvement of above-described embodiment, in the present embodiment, referring to shown in attached drawing 8-9, type chamber 6 passes through 2 structure of lower case
At specifically, being provided with the cross gate 9 with arc along the radian direction of the lower case 2, and cross gate 9 and described second straight
Running channel 5 communicates, and in the two sides of cross gate 9, is respectively equipped with the identical type chamber group of structure, specifically, each type chamber group includes several
The parallel type chamber 6 of camber line；Each type chamber 6 is communicated with the cross gate 9.I.e. potting syrup passes through cross gate 9, while flowing into two sides
Type chamber group in, two groups of type chamber groups can be poured simultaneously, and each type chamber group may include several type chambers 6, and then can be with
It is poured multiple casting simultaneously.
Preferably, the present embodiment summarizes, and each type chamber group includes 1 type chamber 6, it can while being poured and to form 2 casting.
Since shell structure is arc, the influence factors such as thickness of two sides height are more, therefore too many type chamber 6 is arranged in each type chamber group, then
It is easy to cause and pours between the product outpoured, since potting syrup flowing velocity, flow etc. influence, so that difference is big.
In the present embodiment, referring to shown in attached drawing 8, type chamber 6 is two, and several ingates 7 are then equipped on cross gate 9,
The two sides of each ingate 7 are connect with two type chambers 6.
When type chamber 6 is multiple, ingate 7 is connected to the type chamber 6 of close 9 two sides of cross gate, can be between multiple type chambers 6
It is attached by auxiliary ingate or connecting groove etc., for example between flat type chamber 6, passes through groove structure normal thereto
Connection realizes the flowing of potting syrup.In the present embodiment, potting syrup flows to the type chamber 6 of two sides by cross gate 9 simultaneously, and multiple
Ingate 7 flows simultaneously, and poring rate is very fast.
It further include subsidy channel 8 in the present embodiment, specifically, subsidy channel 8 is located at 7 end of ingate, and close to arc
Lower case 2 the center of circle direction setting.For lower case 2, at the direction of the center of circle, sand mold thickness cannot be too thick, otherwise
It is easy to influence structural strength, but when sand mold is thinning, inflow is less than normal, meanwhile, ingate 7 is not easy to pacify at the direction of the center of circle
It puts, the serious circulation for hindering molten iron, and after increasing subsidy channel 8, molten iron velocity of liquid assets can be improved, increase iron water amount,
Ensure the casting of internal cavity 6.
In the present embodiment, subsidy channel 8 is hierarchic structure, and specifically, hierarchic structure includes several flights.I.e. molten iron from
At ingate 7, by flight one by one, into the type chamber 6 at the inner position of arc, molten iron flow is fast, and casting effect is good.
In the present embodiment, the increase in channel 8 is subsidized, the inlet of potting syrup is increased, solves the defects of cold shut.Specifically
Ground, the generation of cold shut are since molten iron is in cavity filling process, temperature is low, running gate system size it is less than normal cause flow is small, fill type speed
Casting flaw caused by low reason is spent, increases subsidy channel 8 and is equivalent to increasing running gate system size, enter type to improve molten iron
Flow and flow rate when chamber improves filling velocity, avoids the drawbacks described above of casting.
It in the present embodiment, subsidizes in channel 8, it is highly 8 ± 2mm that the width in each channel, which is 45 ± 5mm,；I.e. each rank
Terraced slice width degree is 45mm or so, is highly 8mm or so.
In the present embodiment, supporting rib 14, a upper housing 1 and a lower casing can also be equipped in the lower surface of lower case 2
The assembling of body 2 forms one group of sand mold component, if mainly gravity etc. is born in the lower surface of lower case 2 when dry sand mold component stacks,
And supporting rib 14 can assist lower case 2, be used to support institute's sand mold component.
In the present embodiment, it can also increase in the upper surface of lower case 2 and fasten column 12, while in the lower surface of upper housing 1
Corresponding position, setting and the fastening matched buckling groove 13 of column 12.By fastening the matching of column 12 and buckling groove 13, realize
When lower casing body running, the compactness of connection.
In the present embodiment, after being changed to shell mould, lower die is apperance, and upper mold is the sand mold back side and supporting rib, it is not easy to be penetrated
Not firm defect has penetrate the not firm situation of sand only overleaf once in a while, not in apperance face, does not influence casting, improves sand mold and casting
Yield rate.
In the present embodiment, in 2 sand mold of upper housing 1 and lower case, maximum gauge 12mm, and stack-type sand mold in the prior art
In, sand mold maximum gauge is 67.7mm, and sand mold is heavy, and sand using amount is big, and when casting, thickness is excessive, and there are potting syrup flowings slowly,
It radiates the defects of slow.
Embodiment 3
As the further improvement of Examples 1 and 2, arc needle is arcuate structure in the present embodiment, and the two sides of arc are set respectively
There are pin hole, the conductor rope slot structure of the side setting arc of arc, at this point, the structure in order to cooperate arc needle, reference 10 institute of attached drawing
Show, core assembly 3 includes the first fuse 301, the second fuse 302 and third fuse 303, and when placement, the first fuse 301 is placed in
One end of the type chamber 6 of arc is used to form a pin hole of arc needle；Second fuse 302 connect to form arc with third fuse 303
The fuse of shape is placed in type chamber 6, and the specific side by plesiotype chamber 6 is placed, and when casting, will not be poured the fuse of arc, Jin Erke
To form the conductor rope slot structure of arc needle side；Columnar projections are arranged in second fuse, 302 end, columnar projections are placed in the arc
The other end of the type chamber 6 of shape is used to form another pin hole of arc needle.
In the present embodiment, when core assembly 3 is placed, it is fixed in type chamber 6.Specifically, the first fuse in fuse
301, it is equipped with positioning convex platform 16 on the second fuse 302 and third fuse 303, and in type chamber 6, position of being corresponding to it, setting
Have positioning groove 17(mainly in lower case 2), positioning convex platform 16 and 17 matches mutually of positioning groove carry out core assembly 3
It is fixed.
In the present embodiment, core print 18 is equipped with also in fuse external arc；It can referring to the top view of 11 second fuse 302 of attached drawing
Know, the thickness of core print 18 is about 6mm, and height is about 50.74mm, and arc chord length is 487.53mm, arc length 788.79rad；Second
The thickness of fuse 302 is about 12.07mm；Core print 18 is the structure of protrusion, due on the first fuse 301 and third fuse 303
Core print 18 it is consistent with the core head structure on the second fuse 302, therefore be not repeated.In the present embodiment, 18 ruler of core platform 19 and core print
Very little matching, core platform 19 is sunk on sand mold, and core print 18 then protrudes on core assembly 3, is specifically as follows circle
The structures such as cylinder, tetragonal body cooperate with core platform 19, fixed core assembly 3.
In the present embodiment, core print 18 is located at 302 outer circle of the second fuse about 2/3, the end of the first fuse 301 and third core
Son 303 is placed in sand mold close to the end of the first fuse 301, in the lower surface of upper housing 1 and the upper surface setting of lower case 2
Core platform 19 on, after upper-lower casing mould assembly, about 19 core platform clamps core print 18, ensure that fuse will not shift, float, i.e., will not
It is washed away by molten iron.
Referring to shown in attached drawing 10, in the present embodiment, shrinkage pool 11 is equipped in 302 end of the second fuse, third fuse 303 and the
One end of two fuses 302 connection is equipped with the boss 10 cooperated with shrinkage pool 11, when the second fuse 302 connect shape with third fuse 303
When camber fuse, boss 10 is inserted into the shrinkage pool 11.By the structure of boss 10 and shrinkage pool 11, the connection of fuse is facilitated.
In the present embodiment, the fuse of arc is collectively formed with third fuse 303 by the second fuse 302, with sand mold before
In entire fuse compare, fuse is interrupted several sections, increases fuse intensity, fuse is not easy to break and penetrates not firm, fuse production
In, high yield rate.
In the present embodiment, by the way that whole core is adjusted to two core splices, and it is thinned, subtracts narrow, reduce the sand using amount of fuse,
The yield rate of fuse is improved, and not easy to break, fuse is short, penetrates sand reality.
In the prior art, fuse includes the insertion section of arc-shaped component and cylinder, and the entire width of fuse is
80.6mm or so, with a thickness of 29.8mm or so；After being changed to the core assembly in the present embodiment, the width of fuse is reduced to 36.7mm
Left and right, thickness become 12mm or so.
In the present embodiment, the width and thickness of fuse becomes smaller, but will not influence casting dimension, the only core head of change
The size divided, the part for forming casting do not change.
In the present embodiment, using the technique of upper-lower casing casting are as follows:
The installation of sand mold component: core assembly 3 is placed in type chamber 6, upper housing 1 is taken to be installed in lower case 2, type chamber 6 is located at sand
In type component；When installation, the first sprue 4 on upper housing 1 and 5 Matching installation of the second sprue in lower case 2；
Fasten column 12 and when buckling groove 13 when being respectively equipped on upper housing 1 and lower case 2, further include by upper housing 1 under
Shell 2 forms sand mold group after being fastened by fastening column 12 and buckling groove 13, is equipped in the sand mold group for casting
Type chamber 6.
Casting: potting syrup is by pouring cup the first sprue 4 of inflow and the second sprue 5, subsequently into type chamber 6,
So that at least forming an arc needle product in type chamber 6；
Wherein, it is poured step specifically:
Potting syrup is flowed into the first sprue 4 and the second sprue 5 by pouring cup, and flows into each type chamber 6 by ingate 7
It is interior, so that at least forming an arc needle product in each type chamber 6.
It further include teeming step, teeming step after being poured step step specifically:
By subsidizing channel 8, potting syrup carries out subsidy casting to 6 groups of type chamber of center of circle direction of the lower case 2 close to arc.
Arc needle product takes out: dismantling upper housing 1 and lower case 2, takes out the complete product of castable.
Pouring procedure in the present embodiment, by shell mould sand mold, when casting, the channel that potting syrup passes through is less, can use up
Enter in type chamber 6 fastly, potting syrup flowing is uniform, and the thickness of sand mold is thin, then same on sand mold by the way that the sand mold of arc is arranged
To two type chambers 6 of setting, sand using amount can reduce, improve casting efficiency, install high-efficient, the reduction amount of labour additional.
Embodiment 4
Referring to shown in attached drawing 5-10, in the present embodiment, the casting mentioned in production example 3, specially arc needle construction are needed,
Its ontology is arcuate structure, is respectively equipped with pin hole, the conductor rope slot structure of the side setting arc of arc, i.e. side in the two sides of arc
Portion is provided with the trough body structure of arc.
Referring to shown in attached drawing 5-10, in the present embodiment, including upper housing 1, lower case 2 and core assembly 3；The present embodiment
In, the second sprue 5 and the cross gate 9 with arc are set in lower case 2, set respectively in the two sides of the cross gate 9 of arc
A type chamber 6 is set, cross gate 9 is connect by ingate 7 with type chamber 6；The second fuse 302 and third fuse of core assembly 3
303 are fixedly connected by boss 10 with shrinkage pool 11 in advance, form the fuse of arc, the fuse setting of arc is in type chamber 6 far from circle
The side of the heart, and then on the type chamber 6 of the center point, fuse is arranged close to cross gate 9, and the flow direction of potting syrup is at this time,
Enter in cross gate 9 from the first sprue 4 and the second sprue 5, the type chamber 6. of two sides is flowed to when its stream by ingate 7
When the type chamber 6 gone out to the close center of circle, needs to be formed the arc fuse of arc needle guide groove by climbing over, enter from above close to circle
The type chamber 6 in heart direction.Herein, since the conductor rope groove sidewall of arc needle casting is relatively thin, i.e. arc fuse influences hot metal flow than relatively thin
Amount is to influencing filling velocity, at this point, increase subsidy channel 8 in arc fuse side, and by the lightening recesses 15 among type chamber 6
Subsidy is filled and led up；Specifically, lightening recesses 15 are exactly the arc trough among casting, are used to mitigate casting weight, prevent simultaneously
Deformation；Enter type chamber channel to increase molten iron.
In the present embodiment, by increasing subsidy channel 8 in the arc fuse outer wall for forming the core assembly 3 of guide groove, together
When casting weight loss groove is filled and led up, to increase into iron water amount (i.e. potting syrup), potting syrup climbs over above arc fuse through ingate 7
It is connected with subsidy channel 8, into casting type chamber 6.
Pouring procedure in the present embodiment needs multiple groups sand mold group to be poured to form multiple groups casting, comprising the following steps:
Firstly, sand mold component is installed:
1) it is first well placed dedicated lower fixture, then takes a lower case 2, blocks up tight second sprue 5 with dedicated precoated sand insert
(i.e. stifled bottom), prevents from metalling run out.
2) the second fuse 302 and third fuse 303 in core assembly 3 are installed, (positioning convex platform 10 of fuse is embedded in
It positions in shrinkage pool 11)；Meanwhile core assembly 3 being fixed on to the type chamber 6 of lower case 2 by positioning convex platform 16 and positioning groove 17
It is interior, the first fuse 301 is placed in 6 end of type chamber and fixes 302 end of the second fuse, and the core print and core platform of fuse coincide tight
It is real.
3) it takes upper housing 1 to be installed in lower case 2, closes sand mold, form sand mold group；Upper housing 1 closely connects with lower case 2
It connects, close fit between sprue.
4) above step, the straight quota height that is only added to, then in placed on top are repeated.
5) upper fixture is put, screw rod is installed and tightens screw.
Secondly, casting: installing foam ceramic filter at the top of sprue, installing sprue cup after burying case jolt ramming.
Potting syrup is flowed into the first sprue 4 and the second sprue 5 by pouring cup, subsequently into type chamber 6, so that type
An arc needle product is at least formed in chamber 6；For multiple groups sand mold group, 5 lower part of the second sprue and next group of sand mold group
First sprue, 4 connection, and then realize the constant flow of potting syrup.
The casting step specifically:
Potting syrup is flowed into the first sprue 4 and the second sprue 5 by pouring cup, and flows into each type chamber 6 by ingate 7
It is interior, so that at least forming an arc needle product in each type chamber 6.
Again, teeming step specifically:
By subsidizing channel 8, potting syrup carries out subsidy casting to 6 groups of type chamber of center of circle direction of the lower case 2 close to arc.
Finally, arc needle product takes out: dismantling upper housing 1 and lower case 2, take out the complete product of castable.
In the present embodiment, the maximum gauge of sand mold is 12mm；Sand mold thickness becomes smaller, and gas permeability improves, casting upper surface
The defects of stomata, cold shut, is almost without significantly improving blank yield rate.
Sand mold in the present embodiment, when preparing sand mold up and down, the apperance for forming casting is shape when upper mold on lower sand mold
The back side and reinforcing rib at sand mold, precoated sand are by penetrating sand hopper compressed air, by vertical into sand hole entrance on upper sand mold
Cavity between upper and lower mould, and be full of cavity, through sand mold is made after 3-5 minutes be heating and curing, because sand when filling type first
What is filled up is lower die, and what is be finally full of is upper mold (back side), because penetrating not firm defect caused by the reasons such as feel suffocated can all show
The back side will not influence apperance face, that is, will not influence casting quality.And then upper housing 1 and lower case 2 in the present embodiment, system
Standby process is simple.
In the present embodiment, upper housing 1 and lower case 2 are arcuate structure, and sand mold size is small, and pass through two sand mold shapes
At sand mold thickness is thin, convenient for preparation；When prepared by sand mold, easy to be completely well-done, reduction is heating and curing the time, improves shell efficiency processed,
It is significant to subtract sand；When sand mold in the present embodiment is poured, potting syrup flows to the two sides casting of arc from the middle position of arc
Road, ingate 7 is apart from short, and then the channel that potting syrup flows through is few, saves the molten metal (molten iron) of casting.
Comparative example
Referring to shown in attached drawing 1-4, in the present embodiment, sand mold 100 is the identical sand mold of structure, and two sides all has the type chamber 6 of casting,
That is arc cross gate 400, in the present embodiment, core assembly 3 includes the long fuse of arc and is used to form two needles of arc needle
The column fuse in hole.
Casting installation process in the present embodiment is as follows:
Firstly, it is necessary to identical sand mold 100 several, stack mutually, each sand mold upper and lower surface has type chamber 6, core assembly 3
In arc fuse and cylinder be directly placed into type chamber 6；
Secondly, fastening after multiple sand molds 100 stack by fastener, the casting of potting syrup is then carried out by sprue 200,
When potting syrup flows, need to initially enter secondary cross gate 300 by sprue 200, it is then horizontal by entering the arc of its two sides
In running channel 400, casting forms cast product；
Finally, disassembly sand mold 100, that is, can be taken off cast product.
By attached drawing it is found that in the present embodiment, sand mold 100 is the structure similar to diamond shape, relative to arc sand mold, sand
The width of type ontology is big, and cross section is big；Meanwhile in sand mold 100, the contrary setting of two 400 arcs of arc cross gate, this
When sand mold size it is larger, necessarily cause the ratio of secondary cross gate 300 and cast molding chamber (i.e. arc cross gate 400) big, this
Kind structure, has the disadvantage that
First is that placer iron is than big, raw material dosage is big；When forming sand mold 100, consumptive material is more；
Second is that sand mold size is big, bigger energy consumption is needed to be solidified when making sand mold, while when making sand mold, being easy to appear
The not firm problem of sand is penetrated, when this problem necessarily causes sand mold to be poured, sand mold is easy to dissipate, and can not be successfully casting；
Third is that running channel volume is big, waste more.When casting, potting syrup needs to get to arc by longer secondary cross gate 300
Shape cross gate 400, potting syrup circulation are slow.
In the present embodiment, for sand mold with a thickness of 65mm, the solidification of sand mold intermediate capping film sand is ripe impermeable, causes gas forming amount big, breathes freely
Property is very poor, while without solidifying ripe impermeable precoated sand, gas forming amount is small.
In comparative example, sand mold two sides has molding cavity in stack-type technique, and general volume and thickness are all bigger, uses
Sand amount is relatively more, but since the thickness of sand mold is larger, sand mold be it is solid, thicker, sand using amount is big, and at high cost with sand, center portion is covered
It is saturating that film sand is not easy heat hardening, influences sand mold intensity, uncured precoated sand gas forming amount is big, and bleb defect is more, therefore sand mold
The production qualification rate of sand mold is relatively low, influences casting quality, and sand using amount is big, and the yield rate of sand mold 100 is poor.
The technique and consumptive material of embodiment 4 and comparative example compare, and comparative situation is as shown in table 1:
Table 1:
| Placer iron ratio | Sand using amount | Product yield | Yield rate comparison | |
| Embodiment 4 | 2.02 | 13.35Kg | 60.3% | 91.6% |
| Comparative example | 5.20 | 31.4Kg | 45.7% | 67.4% |
By table 1 it is found that improved sand mold and technique, placer iron is than reducing, sand using amount is reduced, product yield reduces, and
Yield rate comparison is increased；Sand mold thickness reduces.
In the present invention, having reduces sand mold size, optimization running channel design, reaches and improves sand mold production yields, improves casting
Part quality lowers running channel volume, reduces the effect of cost.
In the present embodiment, shell mould is changed to by original stack-type, sand mold thickness reduces to 12mm, then with reinforcing rib support and by force
Change, sand mold can be completely well-done when being heating and curing, and reduces the time about 1.5min that is heating and curing, and using electricity wisely improves shell effect processed
Rate, also ensures intensity, without splitting shell defect, hence it is evident that the yield rate for improving sand mold and casting, it is significant to subtract sand, sand mold weight saving
Very much, it can easily be moved very much when shell processed and installation operate, reduce the labor intensity of operative employee, improve efficiency.
In the present embodiment, by changing putting for shell, originally technique is that two apperance Inner arcs are opposite, i.e., from Inner arc
Place is into molten iron, and existing technique is that two apperance circular arcs are unanimously in the same direction, i.e., molten iron is from an apperance Inner arc into from another apperance
External arc (guide groove) is into two apperances become very compact, and sand mold narrows, and reduce obvious.
Originally an arc cross gate is arranged in each apperance Inner arc of technique, also needs from sprue to arc cross gate
Two secondary cross gates connect, and in the present embodiment, with a cross gate simultaneously into two apperances are poured, sprue is arranged in cross gate
Between, a cross gate and two secondary cross gates are reduced, product yield is significantly improved.
The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and it cannot be said that
Specific implementation of the invention is only limited to these instructions.For those of ordinary skill in the art to which the present invention belongs, exist
Under the premise of not departing from present inventive concept, a number of simple deductions or replacements can also be made, all shall be regarded as belonging to of the invention
Protection scope.
Claims (10)
1. a kind of casting sand mould of herbage collecting mechanical arc needle characterized by comprising
Upper housing (1), the upper housing (1) are arcuate structure, and the arcuate structure is equipped with through the upper housing (1) up and down
First sprue (4) at both ends, first sprue (4) communicate with the pouring cup of storage potting syrup；
Lower case (2), the lower case (2) are and the upper housing (1) matched arcuate structure, the lower case (2) and institute
It states the first sprue (4) corresponding position and is equipped with the second sprue (5) for running through lower case (2) upper and lower ends；
After the upper housing (1) and lower case (2) fasten, at least one type chamber (6) is formed, the type chamber (6) is arc, described
First sprue (4) and the second sprue (5) are communicated with the type chamber (6), form arc needle after type chamber (6) casting
Casting；
Core assembly (3), the width of the core assembly (3) are less than the width of the type chamber (6), and the core assembly (3)
In type chamber (6), arc needle casting is formed for secondary cavity (6)；
The maximum gauge of the core assembly (3) is 10mm-14mm.
2. a kind of casting sand mould of herbage collecting mechanical arc needle according to claim 1, which is characterized in that the type
Chamber (6) by the lower case (2) constitute, along the radian direction of the lower case (2) be provided with the cross gate of arc (9),
The cross gate (9) communicates with second sprue (5), and the two sides of the cross gate (9) are respectively equipped with the identical type of structure
Chamber group, the type chamber group include the parallel type chamber (6) of several camber lines；Each type chamber (6) with the cross gate (9)
It communicates.
3. a kind of casting sand mould of herbage collecting mechanical arc needle according to claim 2, which is characterized in that the cross
Running channel (9) is equipped with several ingates (7), the two sides of each ingate (7) and the type chamber close to cross gate (9) two sides
(6) it is connected to.
4. a kind of casting sand mould of herbage collecting mechanical arc needle according to claim 2, which is characterized in that further include
It subsidizes channel (8), the subsidy channel (8) is located at ingate (7) end, and the center of circle direction of the lower case (2) close to arc
Setting.
5. a kind of casting sand mould of herbage collecting mechanical arc needle according to claim 2, which is characterized in that the benefit
Pasting channel (8) is hierarchic structure, and the hierarchic structure includes several flights.
6. a kind of casting sand mould of herbage collecting mechanical arc needle according to claim 1, which is characterized in that the core
Sub-component (3) includes that the first fuse (301), the second fuse (302) and third fuse (303), first fuse (301) are set
In one end of the type chamber (6) of arc, second fuse (302) connect the fuse to form arc with third fuse (303), is placed in
In type chamber (6), the second fuse (302) end is equipped with columnar projections, and the columnar projections are placed in the type chamber (6) of the arc
The other end.
7. a kind of casting sand mould of herbage collecting mechanical arc needle according to claim 6, which is characterized in that described
Two fuses (302) end be equipped with boss (10), one end that the third fuse (303) connect with the second fuse (302) equipped with
The shrinkage pool (11) of boss (10) cooperation, when second fuse (302) connect with third fuse (303), the boss
(10) it is inserted into the shrinkage pool (11).
8. a kind of pouring procedure of herbage collecting mechanical arc needle, uses casting sand mould as claimed in claim 1 to 7,
Characterized by comprising the following steps:
The installation of sand mold component: core assembly (3) is placed in type chamber (6), takes upper housing (1) to be installed on lower case (2), type chamber
(6) it is located in sand mold component；The second sprue on the first sprue (4) and lower case (2) when installation, on upper housing (1)
(5) Matching installation；
Casting: potting syrup is flowed into the first sprue (4) and the second sprue (5) by pouring cup, subsequently into type chamber (6)
It is interior, so that at least forming an arc needle product in type chamber (6)；
Arc needle product takes out: dismantling upper housing (1) and lower case (2), takes out the complete product of castable.
9. a kind of pouring procedure of herbage collecting mechanical arc needle according to claim 8, which is characterized in that described to pour
Infuse step specifically:
Potting syrup is flowed into the first sprue (4) and the second sprue (5) by pouring cup, and each by ingate (7) inflow
In a type chamber (6), so that at least forming an arc needle product in each type chamber (6).
10. a kind of pouring procedure of herbage collecting mechanical arc needle according to claim 9, which is characterized in that described
It further include teeming step after casting step step, the teeming step specifically:
By subsidizing channel (8), potting syrup carries out subsidy to the type chamber group in the center of circle direction of the lower case (2) close to arc and pours
Note.
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| CN109746393A (en) * | 2019-02-27 | 2019-05-14 | 河北中和铸造有限公司 | A kind of double ingate type double-sided dies of single mode plate |
| CN110918893A (en) * | 2019-12-03 | 2020-03-27 | 中国船舶重工集团公司第十二研究所 | Design method of flow-adaptive curve-shaped gravity pouring system |
| CN114260422A (en) * | 2020-12-01 | 2022-04-01 | 安阳市凯创科技有限公司 | Preparation process of sand core shell for casting medium and large precision castings |
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| CN109261896B (en) | 2023-11-14 |
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