CN102950243A - Sand casting mold and manufacturing method thereof - Google Patents
Sand casting mold and manufacturing method thereof Download PDFInfo
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- CN102950243A CN102950243A CN2011102501684A CN201110250168A CN102950243A CN 102950243 A CN102950243 A CN 102950243A CN 2011102501684 A CN2011102501684 A CN 2011102501684A CN 201110250168 A CN201110250168 A CN 201110250168A CN 102950243 A CN102950243 A CN 102950243A
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Abstract
The invention discloses a sand casting mold and a manufacturing method thereof. The sand casting mold is characterized in that due to adoption of an internal-wood and external-plastic compound mold, a compound layer is arranged on the surface of a crude mold main body, due to the structure, the assembled wood blank of the mold can be isolated from air and water, the stability of the wood blank is improved, the surface roughness of a wood mold can be reduced, the surface strength and wear resistance property of the wood mold can be enhanced, and further the service life of the wood mold is prolonged. The manufacturing method of the internal-wood and external-plastic compound mold is simple and clear in steps and convenient to operate.
Description
Technical field
The present invention relates to mould applications, particularly the preparation method of a kind of sand mold casting mold and this mould.
Background technology
For small lot sand casting; Large Sand mold casting particularly; for saving cost; its sand mold casting mold uses the wooden model of being made by timber usually; trial-produce period is long; generally; after Wooden Pattern Making is finished; need to be coated with on the wooden model surface last layer zapon or shellac varnish, with the protection wooden model, but because zapon and shellac varnish are not wear-resisting; therefore after having used a period of time; the zapon on wooden model top layer or shellac varnish will be worn, and its protection was lost efficacy, thereby cause the wooden model lost of life; and along with the variation of weather; wooden model also can produce suction because of the variation of air humidity; dry variation, so that the structural slab of wooden model and the inefficacy of the viscose glue between the structural slab and cracking or distortion, and then cause the wooden model lost of life.This situation is for the long Large Sand mold casting wooden model of complex structure, life cycle, performance more obvious.
Summary of the invention
The technical problem that the present invention solves provides a kind of wear-resisting and be difficult for the preparation method of sand mold casting mold and this mould of craze and transfiguration, long service life.
For achieving the above object, according to an aspect of the present invention, provide a kind of sand mold casting mold, having comprised: roughcast main body and be arranged on the composite bed of thick wooden model main body outer surface, the roughcast main body is made by timber, and composite bed comprises: epoxy resin, curing agent and filler.
Further, the weight proportion of the epoxy resin of composite bed, curing agent and filler is 1: (0.14~0.2): 1.6.
Further, the thickness of composite bed is 20~30mm.
Further, be provided with blind rivet between composite bed and the thick wooden model main body.
Further, blind rivet protrudes the surperficial 10mm of described roughcast main body.
According to another aspect of the present invention, provide the preparation method of above-mentioned sand mold casting mold, concrete steps comprise:
(1) utilize three-dimensional software to carry out three-dimensional minute mould, the nc program of establishment profile apperance and former;
(2) utilize Digit Control Machine Tool to be processed into former according to female die numerically-controlled procedure the foam blank;
(3) the wooden model workman is according to the wooden model structure chart, and roughing goes out the roughcast main body, and on the surface a plurality of blind rivets is set;
(4) by support the roughcast main body is suspended on correct position in the former, casting is in harmonious proportion the composite bed that forms by epoxy resin, curing agent and filler in the former again, wait until that described composite bed solidifies after, the profile apperance of taking-up mould;
(5) utilize the profile apperance of casting mould out Digit Control Machine Tool to carry out the numerical control processing and forming according to the profile apperance nc program that weaves.
Further, the density of the foam blank of the middle making of step (2) former is greater than 20kg/m
3
Further, during step (4) casting composite bed, the periphery of former adopts wooden frame to reinforce.
According to technical scheme of the present invention, owing to adopted interior wood to mould compound die outward, establish composite bed in the roughcast body surfaces, this structure can not only make timber blank and air, the aqueous vapor of mould after assembling completely cut off, improved the stability of timber blank, can also reduce the wooden model surface roughness, strengthen wooden model surface strength and anti-wear performance, and then prolong the service life of wooden model.The outer compound die preparation method step of moulding of wood is simple and clear, easy to operate in being somebody's turn to do.
Description of drawings
Fig. 1 is the sectional structure schematic diagram according to sand mold casting mold of the present invention;
Fig. 2 is the placement schematic diagram during according to sand mold casting mold of the present invention casting;
Fig. 3 is the flow chart according to sand mold casting mold preparation method of the present invention.
The specific embodiment
Below in conjunction with accompanying drawing, a specific embodiment of the present invention is described in detail, but is to be understood that protection scope of the present invention is not subjected to the restriction of the specific embodiment.
Referring to Fig. 1 and Fig. 2, this sand mold casting mold comprises: roughcast main body 1 and be arranged on the composite bed 2 of this roughcast main body 1 outer surface, between this composite bed 2 and roughcast main body 1, be provided with blind rivet 3, be used for reinforcing the connection composite bed 2 and roughcast main body 1, this roughcast main body 1 is made by timber, this composite bed 2 is epoxy resin (RENLAM M-1), curing agent (REN HY 956) and filler (FILLER DT 082 or talcum powder) are in harmonious proportion and form, epoxy resin wherein, curing agent, the weight ratio of filler is preferably 1: (0.14~0.2): 1.6, and these composite bed 2 thickness are 20~30mm.Owing to adopted interior wood to mould compound die outward, establish composite bed 2 on roughcast main body 1 surface, this structure can not only make timber blank and air, the aqueous vapor of mould after assembling completely cut off, improved the stability of timber blank, can also reduce the wooden model surface roughness, strengthen wooden model surface strength and anti-wear performance, and then prolonged the service life of wooden model.
The preparation method of this sand mold casting mold may further comprise the steps:
(1) utilize three-dimensional software to carry out three-dimensional minute mould, the nc program of establishment profile apperance and former;
At first, utilize three-dimensional software (such as Pro/E) to create the profile apperance (not shown) of mould, the profile apperance back suction by mould goes out former 4 (as shown in Figure 2), and former 4 is evenly amplified 5mm as processing capacity; The nc program of working out profile apperance and former 4 according to the profile apperance that creates and former 4 again.
Because the curved surface of this sand mold casting mold is more, directly carry out relatively difficulty of Design of Dies according to product engineering figure, therefore, utilize three-dimensional software (such as Pro/E) to carry out three-dimensional minute mould, can remove in the traditional design method Design of Dies person to the space imagination of the two and three dimensions of complex-shaped surface mould, core, design difficulty and Mould Machining difficulty can be reduced, and the design accuracy of this mould can be improved.
(2) making of former;
At first, foam blank of blanking ensures enough allowance, and the density of foamed plastics is at 20kg/m
3More than, the recycling Digit Control Machine Tool obtains former 4 according to the processing of the nc program that weaves, and it is round and smooth to carry out the finishing of former 4 die cavities.
(3) making of roughcast main body;
The wooden model workman is according to the wooden model structure chart, roughcast main body 1 is finished in roughing, and a plurality of blind rivets 3 (as depicted in figs. 1 and 2) are set on the surface, the surface that blind rivet 3 protrudes roughcast main body 1 is about 10mm, when composite bed 2 is cast on the roughcast main body 1, blind rivet 3 plays the effect of the composite bed 2 of tension casting, has increased the fastness of whole mould, has improved the mold use life-span.The steam vent (not shown) also will be carried out in position in roughcast main body 1 depression, guarantees the quality of casting.
(4) casting composite bed;
At first, by support 5 roughcast main body 1 is suspended on correct position in the former 4 (this moment, the periphery of former 4 adopted wooden frame 6 to reinforce), then, casting composite bed 2 in the former 4 adopts during casting and presses case, prevents that roughcast main body 1 from floating in casting cycle.Composite bed 2 by the weight ratio of epoxy resin, curing agent, filler by 1: (0.14~0.2): 1.6 are in harmonious proportion rear casting forms.After composite bed 2 solidifies, the profile apperance of taking out mould.
(5) numerical control processing and forming;
The profile apperance of the mould of casting is out carried out (such as polishing) after removing surface and some common process, and the recycling Digit Control Machine Tool carries out the numerical control processing and forming according to the nc program that weaves.
Should mould the compound die preparation method outside the interior wood, step is simple and clear, easy to operate, and the wooden model of making is appearance looks elegant not only, and stability is high, wearability is good, has greatly prolonged the service life of wooden model, simultaneously, can alleviate workman's labour intensity, shorten the Mold Making cycle.
More than disclosed only be a specific embodiment of the present invention, still, the present invention is not limited thereto, the changes that any person skilled in the art can think of all should fall into protection scope of the present invention.
Claims (8)
1. a sand mold casting mold is characterized in that, comprising: roughcast main body and be arranged on the composite bed of described thick wooden model main body outer surface, and described roughcast main body is made by timber, and described composite bed comprises: epoxy resin, curing agent and filler.
2. sand mold casting mold according to claim 1 is characterized in that, the weight proportion of the epoxy resin of described composite bed, curing agent and filler is 1: (0.14~0.2): 1.6.
3. sand mold casting mold according to claim 2 is characterized in that, the thickness of described composite bed is 20~30mm.
4. sand mold casting mold according to claim 1 is characterized in that, is provided with blind rivet between described composite bed and the thick wooden model main body.
5. sand mold casting mold according to claim 4 is characterized in that, described blind rivet protrudes the surperficial 10mm of described roughcast main body.
6. preparation method such as each described sand mold casting mold in the claim 1 to 5 is characterized in that concrete steps comprise:
(1) utilize three-dimensional software to carry out three-dimensional minute mould, the nc program of establishment profile apperance and former;
(2) the foam blank is utilized Digit Control Machine Tool be processed into former according to described female die numerically-controlled procedure;
(3) the wooden model workman is according to the wooden model structure chart, and roughing goes out the roughcast main body, and on the surface a plurality of blind rivets is set;
(4) by support the roughcast main body is suspended on correct position in the former, casting is in harmonious proportion the composite bed that forms by epoxy resin, curing agent and filler in the former again, wait until that described composite bed solidifies after, the profile apperance of taking-up mould;
(5) utilize the profile apperance of casting mould out Digit Control Machine Tool to carry out the numerical control processing and forming according to the profile apperance nc program that weaves.
7. the preparation method of sand mold casting mold according to claim 6 is characterized in that, the density of the foam blank of making former is greater than 20kg/m in the described step (2)
3
8. the preparation method of sand mold casting mold according to claim 6 is characterized in that, during described step (4) casting composite bed, the periphery of described former adopts wooden frame to reinforce.
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CN2011102501684A CN102950243A (en) | 2011-08-29 | 2011-08-29 | Sand casting mold and manufacturing method thereof |
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CN2011102501684A CN102950243A (en) | 2011-08-29 | 2011-08-29 | Sand casting mold and manufacturing method thereof |
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Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103878304A (en) * | 2014-03-03 | 2014-06-25 | 安徽华通铸业有限公司 | Casting process of pump valve casting |
CN104959532A (en) * | 2015-05-29 | 2015-10-07 | 宁夏共享模具有限公司 | High-hardness and high-strength resin mold production method |
CN106825403A (en) * | 2017-01-16 | 2017-06-13 | 共享装备股份有限公司 | A kind of wooden one core box of casting resin and preparation method thereof |
CN106903264A (en) * | 2017-04-17 | 2017-06-30 | 浙江品川精密机械有限公司 | The mother matrix of lathe sand mold mould |
CN110576149A (en) * | 2019-10-18 | 2019-12-17 | 彰武县联信铸造硅砂有限公司 | Layered curing composite molding process for precoated sand |
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EP0005712A2 (en) * | 1978-04-03 | 1979-12-12 | Kleine Brockhoff GmbH | Patterns and their method of manufacture |
JPS63286239A (en) * | 1987-05-18 | 1988-11-22 | Taiyo Chuki Kk | Resin mold |
CN2403518Y (en) * | 1999-10-15 | 2000-11-01 | 徐成林 | Metal-wood-plastic composite structural casting mould |
CN2753488Y (en) * | 2004-11-24 | 2006-01-25 | 中国第一汽车集团公司 | High-hardness casting die with surface chemical-plated nickel-phosphorus alloy |
CN101716654A (en) * | 2009-12-15 | 2010-06-02 | 宁夏长城须崎铸造有限公司 | New process method for manufacturing mold capable of ensuring size accuracy of cast blade for large-scale water turbine |
CN202291231U (en) * | 2011-08-29 | 2012-07-04 | 广西玉柴机器股份有限公司 | Sand mold casting mold |
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EP0005712A2 (en) * | 1978-04-03 | 1979-12-12 | Kleine Brockhoff GmbH | Patterns and their method of manufacture |
EP0005712A3 (en) * | 1978-04-03 | 1980-01-23 | Kleine Brockhoff GmbH | Patterns and their method of manufacture |
JPS63286239A (en) * | 1987-05-18 | 1988-11-22 | Taiyo Chuki Kk | Resin mold |
CN2403518Y (en) * | 1999-10-15 | 2000-11-01 | 徐成林 | Metal-wood-plastic composite structural casting mould |
CN2753488Y (en) * | 2004-11-24 | 2006-01-25 | 中国第一汽车集团公司 | High-hardness casting die with surface chemical-plated nickel-phosphorus alloy |
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Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103878304A (en) * | 2014-03-03 | 2014-06-25 | 安徽华通铸业有限公司 | Casting process of pump valve casting |
CN104959532A (en) * | 2015-05-29 | 2015-10-07 | 宁夏共享模具有限公司 | High-hardness and high-strength resin mold production method |
CN106825403A (en) * | 2017-01-16 | 2017-06-13 | 共享装备股份有限公司 | A kind of wooden one core box of casting resin and preparation method thereof |
CN106903264A (en) * | 2017-04-17 | 2017-06-30 | 浙江品川精密机械有限公司 | The mother matrix of lathe sand mold mould |
CN110576149A (en) * | 2019-10-18 | 2019-12-17 | 彰武县联信铸造硅砂有限公司 | Layered curing composite molding process for precoated sand |
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Application publication date: 20130306 |