CN110421643B - Cutting device - Google Patents
Cutting device Download PDFInfo
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- CN110421643B CN110421643B CN201910621700.5A CN201910621700A CN110421643B CN 110421643 B CN110421643 B CN 110421643B CN 201910621700 A CN201910621700 A CN 201910621700A CN 110421643 B CN110421643 B CN 110421643B
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- side cutting
- cutting edge
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- 238000005520 cutting process Methods 0.000 title claims abstract description 299
- 238000004080 punching Methods 0.000 claims abstract description 41
- 238000010008 shearing Methods 0.000 claims abstract description 20
- 238000003825 pressing Methods 0.000 claims description 19
- 230000033001 locomotion Effects 0.000 claims description 15
- 238000009966 trimming Methods 0.000 abstract description 5
- 239000002699 waste material Substances 0.000 abstract description 5
- 230000002146 bilateral effect Effects 0.000 description 14
- 238000004804 winding Methods 0.000 description 11
- 238000005034 decoration Methods 0.000 description 8
- 238000005096 rolling process Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 238000003860 storage Methods 0.000 description 6
- 230000036544 posture Effects 0.000 description 5
- 238000001179 sorption measurement Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000003856 thermoforming Methods 0.000 description 4
- 239000002985 plastic film Substances 0.000 description 3
- 238000004806 packaging method and process Methods 0.000 description 2
- 238000007639 printing Methods 0.000 description 2
- 238000002788 crimping Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000033764 rhythmic process Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 210000003813 thumb Anatomy 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
- B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
- B26F1/38—Cutting-out; Stamping-out
- B26F1/40—Cutting-out; Stamping-out using a press, e.g. of the ram type
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
- B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
- B26F1/38—Cutting-out; Stamping-out
- B26F1/44—Cutters therefor; Dies therefor
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Forests & Forestry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Making Paper Articles (AREA)
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
Abstract
The invention discloses a cutting device which comprises a lower die plate, an upper die plate and a driving assembly, wherein the upper die plate is arranged on the driving assembly and moves in a straight reciprocating mode, the lower die plate is positioned on a straight reciprocating path of the upper die plate, a punching and shearing cutter is arranged on the upper die plate, and a punching and shearing through hole corresponding to the punching and shearing cutter is formed in the lower die plate. The cutting device can provide a die cutting operation comprising slitting and trimming for the decorative sheet, and the decorative sheet can be directly processed into a strip-shaped decorative strip with a slit edge trimmed by the cutting device, so that the utilization rate of the decorative sheet is improved, and waste materials are reduced.
Description
Technical Field
The invention relates to a cutting device, in particular to a cutting device for producing decorative strips on prefabricated cups.
Background
The prefabricated cup is formed by heating and shaping plastic sheets, is of an integrated structure, and is provided with a cup body structure and a cup edge structure, wherein the cup edge is positioned at the upper part of the cup body and protrudes around the cup body, and the outer contour of the cup edge is the same as the shape of the cross section of the cup body and also different from the shape of the cross section of the cup body; the design purpose of the cup rim is to realize continuous conveying in the forming process, sealing after filling and carrying and packaging in the sales stage, and the design purpose of the cup body is to contain materials, main display parts of cup-shaped design and main display parts of packaging design, so that the whole appearance of the prefabricated cup is mainly constrained by the structure of the cup body. The cup body of the common prefabricated cup has a cylindrical structure, an inverted truncated cone-shaped structure, a cuboid structure with round corners and a spherical structure. In order to match with the sales of the prefabricated cup, a decoration strip is usually arranged on the cup body of the prefabricated cup, the decoration strip surrounds the cup body, and product information, enterprise information and other designs which are helpful for improving the appearance significance of the product are printed on the surface of the decoration strip. The structure formed by the integral curling of the decorative strip is completely matched with the surface structure of the cup body, and only then the decorative strip can be attached to the cup body, so that the decorative strip can display information and express the appearance characteristics of the cup body.
The cup body is in an inverted truncated cone-shaped structure, and the used decorative strip is curled in an inverted truncated cone shape, namely the curled decorative strip has a large upper width and a small lower width. The ornamental strip is spread and is presented as fan annular structure after spreading, and the ornamental strip is equipped with two convex limit and two straight flange, and two straight flange are located the tip of ornamental strip, and the one end and the other end of ornamental strip link up after the crimping for two straight flange zonulae occludens together.
In the prior art, the manufacturing and processing of the decorative strip curled in an inverted truncated cone-shaped structure needs to be subjected to slitting, trimming and sectioning. Firstly, cutting a sheet with a larger width to form a continuous sheet with a smaller width; cutting the edges of the continuous sheet with smaller width to form concave arc edges, convex arc edges and short straight edges, so as to form continuous sheet to be cut, wherein the continuous sheet to be cut is formed by alternately arranging fan-shaped annular parts and isosceles triangle parts; finally, by cutting the isosceles triangle part, a sector-shaped decorative strip is obtained from the continuous sheet to be cut, and the cut triangle part is discharged as waste. Obviously, the quantity of the waste materials is consistent with that of the decorative strips, and the utilization rate of the materials for producing the decorative strips is low; and the decorative sheet is extremely wasted in a trimming mode after slitting, so that the utilization rate of the material for producing the decorative strip is lower.
The cut decorative strip is pushed into a label feeding mold of the label rolling mechanism under the clamping and driving of a roller, and a storage cavity for storing the decorative strip is formed in the label feeding mold. After the decorative strip is cut, the decorative strip can only move by clamping and pushing by the roller. In order to ensure that the decorative strip can completely enter the storage cavity, not only the roller is arranged on the label feeding die, but also a cutter for cutting the isosceles triangle part is arranged on the label feeding die; and the roller and the cutter are close to the storage cavity so that the tail end of the decorative strip obtained by cutting can enter the storage cavity under the pushing action of the cutter. This results in a very complex structure for supplying the decorative strip.
Although the decorative strip is curled in the label feeding mold, the outer side of the decorative strip is limited by the label feeding mold, but the central line direction of the storage cavity is not limited, the curling state of the decorative strip is uncontrollable, and the curling states are not necessarily the same.
After the mark feeding mould is fully loaded with the decorative strip, the mark feeding mould moves to the upper part of the forming mould, the push rod stretches into the storage cavity, one end of the push rod is contacted with the decorative strip in a curled state, and the decorative strip is pushed to move to the position of the forming mould. Until the decorative strip is pushed into the cavity of the forming die and the decorative strip is extruded to fit in the cavity. Because the interior of the interior cavity of the decorative strip is tightly attached to the inner wall of the mark feeding mold, the thickness of the decorative strip is very thin, accidents can occur when the push rod pushes the decorative strip, the edge of the decorative strip is deformed under force and embedded in a gap between the push rod and the mark feeding mold, and the part of the decorative strip is not in a reasonable posture after being curled and is extruded and deformed by the push rod, and the printing information on the surface of the decorative strip is worn. The controllability of the curling supply process of the decorative strip is low, the curling success rate of the decorative strip is not high enough, and the production process of the prefabricated cup is finally influenced.
A forming die carrying the decorative strip is placed at a preform cup forming station, and the decorative strip and the preform cup are combined together while the preform cup is formed by extruding a plastic sheet which has been heated. The decorative strip is arranged on the prefabricated cup. The ornamental strip curls on the cup body, and the both ends of ornamental strip link up together, and the straight flange of one end of ornamental strip is close to the other end straight flange of ornamental strip. The thickness of each joint of the cup body and the decorative strip is the same.
Due to the specific thermoforming process of the prefabricated cup, the wall thickness of the cup rim of the prefabricated cup is larger than the wall thickness of the cup body. Although the decorative strip is arranged on the cup body, the thickness of the whole prefabricated cup at the cup body can be increased, but the pressure applied to the cup body by the thumb when the cup body is held by a hand in the operation of opening the prefabricated cup still cannot be resisted, and a small amount of deformation exists in most cases. The use experience of the product defect, which is inconvenient for the consumer, can impair the overall image of the product in the consumer impression, which is very unfavorable for the long-term business activities of enterprises.
Disclosure of Invention
The technical problem to be solved by the invention is how to avoid the operation steps of trimming after slitting in the process of processing the decorative sheet, thereby obtaining the cutting device.
In order to solve the technical problems, the invention adopts the following technical scheme: the cutting device comprises a lower die plate, an upper die plate and a driving assembly, wherein the upper die plate is arranged on the driving assembly and makes linear reciprocating motion, the lower die plate is located on a linear reciprocating motion path of the upper die plate, a punching shear cutter is arranged on the upper die plate, a punching shear forming channel, an inner concave edge cutting edge and an outer convex edge cutting edge are arranged on the punching shear cutter, the inner concave edge cutting edge and the outer convex edge cutting edge are distributed on two sides of the punching shear forming channel, the inner concave edge cutting edge comprises an arc-shaped cutting edge I and a linear cutting edge I, one end of the arc-shaped cutting edge I is connected with one end of the linear cutting edge I, the outer convex edge cutting edge comprises an arc-shaped cutting edge II and a linear cutting edge II, one end of the arc-shaped cutting edge II is connected with one end of the linear cutting edge II, a circle center of the straight cutting edge I between any inner concave edge cutting edge and the adjacent outer convex edge cutting edge is inclined to the center of the linear cutting edge II, the circle center of the arc-shaped cutting edge I coincides with the circle center of the arc-shaped cutting edge II, the radian of the arc-shaped cutting edge I is larger than that of the arc-shaped cutting edge II, and a through hole corresponding punching shear cutter is arranged on the lower die plate.
According to the technical scheme, the decorative sheet is processed in the die cutting mode, the cutting operation direction obtained in the mode is wider than the cutting operation direction of the hob cutting mode, and the die cutting mode and the decorative sheet are cooperated through the step-by-step movement of the decorative sheet, so that the decorative sheet is just matched with the working rhythm of other equipment for producing the decorative strip, and all the equipment in the technical scheme have good compatibility and do not need specific debugging operation. The cutting device can directly process the decorative sheet into a strip-shaped decorative strip with separated edges trimmed.
Preferably, the punching shear comprises a single-sided cutting tool, a double-sided cutting tool I and a double-sided cutting tool II, wherein the upper template is provided with two single-sided cutting tools, the double-sided cutting tool II is positioned between the two single-sided cutting tools, the distance from the double-sided cutting tool II to any one single-sided cutting tool is identical, the double-sided cutting tools I are distributed between the double-sided cutting tool II and the single-sided cutting tools in an equidistant arrangement manner, the distance between the single-sided cutting tool I and the double-sided cutting tools, the distance between the adjacent double-sided cutting tools I and the double-sided cutting tools I are identical, the distance between the double-sided cutting tools I and the double-sided cutting tools II are identical, the forming channel of the punching shear is distributed between the single-sided cutting tools and the double-sided cutting tools I, the adjacent cutting tools I and the double-sided cutting tools II, one side cutting tools are provided with inner concave edge cutting edges on one side, the double-sided cutting tools I are provided with outer concave edge cutting edges on the other side, the double-sided cutting tools I are provided with outer convex edge cutting edges on the other side, the double-sided cutting tools I are provided with outer concave edge cutting edges, the inner concave edge cutting edges I and outer edge cutting edges, the double-sided cutting edges I are provided with the convex edge cutting edges, and the inner concave edge cutting edges I are identical, and the concave edge cutting edges I are provided with the concave edge cutting edges I, and the concave edge cutting edges I are provided. The inner concave edge cutting edge of one bilateral cutting tool I in the adjacent bilateral cutting tools I is adjacent to the outer convex edge cutting edge of the other bilateral cutting tool I.
The upper template is provided with a pre-pressing plate, the pre-pressing plate is movably arranged on the upper template in a sliding mode, the sliding motion direction of the pre-pressing plate relative to the upper template is parallel to the linear reciprocating motion direction of the upper template, and the pre-pressing plate is positioned around the punching shear tool. When the pre-pressing plate works, the pre-pressing plate contacts the decorative sheet material earlier than the punching and shearing tool, so that a better operation condition is provided for the die cutting of the punching and shearing tool.
The length of the unilateral cutting tool and the length of the bilateral cutting tool II are both greater than the length of the bilateral cutting tool I. The length of the unilateral cutting tool and the bilateral cutting tool II firstly enter the lower die plate during die cutting, and meanwhile, the length of the unilateral cutting tool and the bilateral cutting tool II play a role in guiding, so that the smooth die cutting of the bilateral cutting tool I is facilitated.
The invention adopts the technical scheme that: the cutting device can provide a die cutting operation comprising slitting and trimming for the decorative sheet, and the decorative sheet can be directly processed into a strip-shaped decorative strip with a slit edge trimmed by the cutting device, so that the utilization rate of the decorative sheet is improved, and waste materials are reduced.
Drawings
The invention is further described below with reference to the drawings and the detailed description.
FIG. 1 is a schematic view of a cutting device according to the present invention;
FIG. 2 is a perspective view of an upper die plate of a cutting device according to the present invention;
FIG. 3 is a front view of an upper die plate of a cutting apparatus according to the present invention;
FIG. 4 is a perspective view of a lower die plate of a cutting device according to the present invention;
FIG. 5 is a schematic view showing assembly of an upper die plate and a lower die plate of a cutting device according to the present invention;
FIG. 6 is a schematic view of a cutting device according to the present invention;
FIG. 7 is a schematic view of a strip produced by a cutting apparatus according to the present invention;
FIG. 8 is a schematic diagram of an adsorption type label rolling mechanism for producing a prefabricated cup by using a strip-shaped decorative strip produced by a cutting device of the invention;
fig. 9 is a schematic view showing a structure of a strip-shaped decorative strip produced by a cutting device according to the present invention, which is used on a preform cup after being cut.
Detailed Description
The production of the prefabricated cup comprises the steps of producing the decoration strip, supplying the decoration strip and thermoforming the prefabricated cup, wherein the supply decoration strip directly serves the thermoforming link of the prefabricated cup.
The production raw materials of ornamental strip are the great decorative sheet of width of winding up on the roller, and decorative sheet is through cutting forming many rectangular form ornamental strip, and in order to match the hot fashioned technical requirement of prefabricated cup, the quantity of rectangular form ornamental strip is even.
As shown in fig. 1,2, 3, 4, 5, the cutting operation is performed at a longitudinal cutting station. The cutting device for cutting is arranged in a longitudinal cutting station and comprises an upper template 1, a lower template 2, a driving component 3 and a frame. Four guide posts which are in parallel position relation with each other are arranged on the frame, the guide posts penetrate through the upper die plate 1, and the upper die plate 1 and the guide posts can be movably connected in a sliding mode. The lower template 2 is fixed on the frame; the driving component 3 is provided with a linear air cylinder, the cylinder body of the linear air cylinder is fixed on the frame, a piston rod of the linear air cylinder is connected with the upper template 1, the driving component 3 drives the upper template 1 to do linear reciprocating motion along the guide post, and the lower template 2 is positioned on the linear reciprocating motion path of the upper template 1.
The upper template 1 is provided with punching cutters which are all positioned on one side of the upper template 1 and all face to the position of the lower template 2. The lower die plate 2 is provided with a punching and shearing through hole 4 which is consistent with the outline of the punching and shearing cutter, and when the punching and shearing cutter is inserted into the punching and shearing through hole 4, a shearing process is formed between the punching and shearing through hole and the punching and shearing through hole, so that the decorative sheet can be subjected to die cutting operation.
The punching shear tool comprises a single-side cutting tool 5, a double-side cutting tool I6 and a double-side cutting tool II 7. The length of the single-side cutting tool 5 and the length of the double-side cutting tool II 7 are both larger than the length of the double-side cutting tool I6.
The upper template 1 is provided with two unilateral cutting tools 5, the bilateral cutting tool II 7 is positioned at the position right in the middle of the two unilateral cutting tools 5, and the distances from the bilateral cutting tool II 7 to any unilateral cutting tool 5 are the same. The double-sided cutting tools I6 are distributed between the double-sided cutting tools II 7 and the single-sided cutting tools 5 in an equidistant arrangement mode, and the distance between the single-sided cutting tools 5 and the double-sided cutting tools I6, the distance between adjacent double-sided cutting tools I6 and the distance between the double-sided cutting tools I6 and the double-sided cutting tools II 7 are the same; the two unilateral cutting tools 5 are in mirror symmetry relative to the central line of the bilateral cutting tool II 7; the double-sided cutting tool I6 positioned on one side of the double-sided cutting tool II 7 and the double-sided cutting tool I6 positioned on the other side of the double-sided cutting tool II 7 are in mirror symmetry relative to the center line positioned on the double-sided cutting tool II 7, and the number of the double-sided cutting tools I6 positioned on one side of the double-sided cutting tool II 7 is equal to the number of the double-sided cutting tools I6 positioned on the other side of the double-sided cutting tool II 7.
And a punching shear forming channel 8 is formed between the single-side cutting tool 5 and the double-side cutting tool I6, between adjacent double-side cutting tools I6 and between the double-side cutting tool I6 and the double-side cutting tool II 7.
One side of the unilateral cutting tool 5 is provided with an inward concave edge cutting edge, one side of the bilateral cutting tool I6 is provided with an inward concave edge cutting edge, the other side of the bilateral cutting tool I6 is provided with an outward convex edge cutting edge, and two sides of the bilateral cutting tool II 7 are provided with outward convex edge cutting edges. The inner concave edge cutting edge of the single-side cutting tool 5 has the same structure as the inner concave edge cutting edge of the double-side cutting tool I6, and the outer convex edge cutting edge of the double-side cutting tool I6 has the same structure as the outer convex edge cutting edge of the double-side cutting tool II 7; the inner concave edge cutting edge of the single-side cutting tool 5 is adjacent to the outer concave edge cutting edge of the double-side cutting tool I6, the inner concave edge cutting edge of the double-side cutting tool I6 is adjacent to the outer concave edge cutting edge of the double-side cutting tool II 7, and the inner concave edge cutting edge of one double-side cutting tool I6 in the adjacent double-side cutting tools I6 is adjacent to the outer concave edge cutting edge of the other double-side cutting tool I6. Therefore, the concave edge cutting edge and the convex edge cutting edge are both distributed on both sides of the punching shear forming channel 8. The concave edge cutting blade comprises an arc blade I9 and a straight blade I10, and one end of the arc blade I9 is connected with one end of the straight blade I10; the outer flange cutting blade comprises an arc blade II 11 and a straight blade II 12, and one end of the arc blade II 11 is connected with one end of the straight blade II 12. The straight line cutting edge I10 between any one concave edge cutting edge and the adjacent convex edge cutting edge is inclined to the straight line cutting edge II 12, the circle center of the arc cutting edge I9 coincides with the circle center of the arc cutting edge II 11, and the radian of the arc cutting edge I9 is larger than that of the arc cutting edge II 11.
The upper template 1 is provided with a pre-pressing plate 13. The pre-pressing plate 13 is slidably movably mounted on the upper die plate 1, and the pre-pressing plate 13 is located around the punching shear. A guide post and a reset spring are arranged between the pre-pressing plate 13 and the upper template 1, one end of the guide post is fixedly connected with the pre-pressing plate 13, the other end of the guide post penetrates through the upper template 1 and is provided with a nut, the upper template 1 is in sliding connection with the guide post, the reset spring is sleeved on the guide post, one end of the reset spring is connected with the pre-pressing plate 13, the other end of the reset spring is connected with the upper template 1, the reset spring is in a compressed state after installation, and the central line of the guide post is parallel to the linear reciprocating motion direction of the upper template 1, so that the sliding motion direction of the pre-pressing plate 13 relative to the upper template 1 is parallel to the linear reciprocating motion direction of the upper template 1.
In the initial state, the punching shear of the cutting device is far away from the lower die plate 2. Before cutting, firstly extending the decorative sheet out of a section in the conveying direction and extending the decorative sheet between the punching shear tool and the lower template 2 in a horizontal posture, and placing the decorative sheet on the lower template 2; when cutting is started, the punching and shearing tool moves to the position where the decorative sheet is located, the pre-pressing plate 13 contacts with the decorative sheet before the punching and shearing tool, and the pre-pressing plate 13 tightly presses the decorative sheet on the lower die plate 2; during cutting, the punching shear tool presses the decorative sheet, and the part of the decorative sheet, which is in close contact with the inner concave edge cutting edge and the outer convex edge cutting edge, is subjected to the action of shearing force; after cutting, the decorative sheet is formed with a contour corresponding to the concave edge cutting edge and the convex edge cutting edge, and the cut waste is discharged from the punching and shearing forming channel 8. Then the cutting device is restored to the original state, the sheet to be decorated is output along the same direction for a distance which is the length of the punching and shearing forming channel 8, and the decorative sheet can be cut into a plurality of strip-shaped decorative strips by repeating the cutting action, as shown in fig. 6.
As shown in fig. 7, the strip-shaped decorative strip is provided with a fan-shaped annular part 14 and an isosceles triangle part 15, the fan-shaped annular part 14 and the isosceles triangle part 15 are alternately arranged, the straight edge of the fan-shaped annular part 14 is connected with the waist of the isosceles triangle part 15, and the length of the straight edge of the fan-shaped annular part 14 is equal to the length of the waist of the isosceles triangle part 15. The bottom side of the isosceles triangle 15 is parallel to the conveying direction of the strip-shaped decorative strip.
In the decoration strip supplying stage, the strip-shaped decoration strip passes through a winding alignment station and then is input into a transverse cutoff cutting station.
A winding alignment part is arranged at a winding alignment station, a winding wheel is arranged in the winding alignment part, and the winding wheel is arranged to form a conveying path for conveying decorative strips, for example, a decorative strip supply method and a winding alignment part recorded in a die-cutting part, which is suitable for the method, are disclosed in China patent 2017, 5, 10 and published under the patent name CN 106625863A. The strip-shaped decorative strips are turned into vertical postures and then enter the winding alignment component, the number of the strip-shaped decorative strips is even, and the turning direction of half of the strip-shaped decorative strips is opposite to the turning direction of the other half of the strip-shaped decorative strips. The overturning operation can ensure that the printing information on the surface of the decorative strip can be exposed on the surface of the cup body.
The strip-shaped decorative strip enters the transverse cutting station after passing through the winding alignment station, and the transverse cutting station is provided with a transverse cutting device, which can adopt the technical scheme of the label cutting device disclosed in Chinese patent 2016, 1 month and 20 days and disclosed in publication No. CN105253685A, and adjust the spatial posture of the straight cutting edge required by cutting into an inclined posture, so that the inclination angle of the cutting edge is the same as the base angle of the isosceles triangle part 15 on the strip-shaped decorative strip. After the decorative strip is input into the transverse cutting device, the joint of the fan-shaped annular part 14 and the isosceles triangle part 15 of the long-strip decorative strip, namely the waist part of the isosceles triangle part 15, is cut by the transverse cutting device, and the long-strip decorative strip is cut in equal length to form a single-section decorative strip with an overall arch structure; the strip-shaped decorative strip performs stepping motion, and the length of each time the strip-shaped decorative strip enters the transverse cutting device is equal to the length of the decorative strip with the single section and the whole arched structure and is also equal to the length of the punching and shearing forming channel 8. Thanks to the coordination of the winding alignment components, the difference of the lengths of any two strip-shaped decorative strips between the longitudinal cutting station and the transverse cutoff cutting station is an integral multiple of the lengths of the decorative strips of the single-section integral arch structure, and the lengths are the same and different.
As shown in fig. 8, the single-segment decorative strip with an arch structure comprises a main body 16 and a connecting part 17, wherein the main body 16 is in a fan shape, and the connecting part 17 is in an isosceles triangle shape. The straight edge at one end of the body 16 is mirror symmetrical with the straight edge at the other end of the body 16 with respect to the center line of the body 16, the waist of the connecting portion 17 is connected with the straight edge at one end of the body 16 and the length of the waist of the connecting portion 17 is equal to the length of the straight edge at one end of the body 16. The center of the circular arc edge of the convex side on the body 16 coincides with the center of the circular arc edge of the concave side on the body 16, and the radian of the circular arc edge of the convex side on the body 16 is smaller than that of the circular arc edge of the concave side on the body 16. The convex side of the body 16 is machined from the outer convex edge cutting edge of the cutting device, and the concave side of the body 16 and the bottom edge of the connecting portion 17 are machined from the inner concave edge cutting edge of the cutting device. As shown in fig. 8, the edge of the connecting portion 17 is located between the tangent line of the convex side of the body 16 at the end where the straight edge of the body 16 is located and the tangent line of the concave side of the body 16 at the end where the straight edge of the body 16 is located. The straight edge at the other end of the body 16 is parallel to the other waist of the connecting portion 17 and has the same length, so that the outline of the edge of one end of the decorative strip in the width direction is the same as the outline of the edge of the other end of the decorative strip in the width direction as a whole.
Since the waist of the connecting portion 17 of the trim to be the single-segment trim is cut off between each cut and the straight edge of the body 16 of the trim that has been the single-segment trim, the single-segment trim upper connecting portion 17 is located in front of the body 16 in the trim conveying direction.
The decorative strip with a single section and an arch structure is obtained by cutting and input into the adsorption type label rolling mechanism, the adsorption type label rolling mechanism can adopt a technical scheme disclosed by Chinese patent 2015, 12, 16 and publication No. CN105151446A, and the die cavity of the forming die is arranged in a round table shape. When the decorative strip enters the adsorption type label rolling mechanism, the cylindrical label rolling mold core 18 attracts the decorative strip and winds the decorative strip around the side surface of the label rolling mold core 18, so that one end of the body 16 is covered on the end of the body 16 connected with the connecting part 17, namely, one end of the body 16 is covered on the other end of the body 16. Then, the label mold core 18 stops rotating and the negative pressure disappears, the pushing component 19 in the adsorption label rolling mechanism pushes the curled decorative strip into the mold cavity of the forming mold, the curled decorative strip positioned in the mold cavity is extruded to be unfolded to form a round table shape, one end of the body 16 is covered on the connecting part 17, the straight edge at one end of the body 16 is connected with the straight edge at the other end of the body 16, namely, the two straight edges are overlapped in the direction perpendicular to the center line of the mold cavity.
The forming die is placed at the thermoforming site and the plastic sheet is extruded within the forming die to ultimately form the preform cup. The prefabricated cup is provided with a cup rim, a cup body and a decorative strip, wherein the cup rim and the cup body are of an integral structure, the cup body is of an inverted truncated cone-shaped structure, the cup rim is positioned at the end with the largest width of the cup body and protrudes out of the surface of the cup body, the cup rim is of a circular ring-shaped structure as a whole and is provided with a film-lifting protrusion with a large width and extending in the radial direction, and the decorative strip is arranged on the cup body in a curled state; one end of the body 16 of the ornamental strip is covered on the connecting part 17 and is connected with the connecting part 17 to be curled into an inverted truncated cone shape, and the straight edge at one end of the body 16 is connected with the straight edge at the other end of the body 16, namely, the two straight edges are overlapped in the direction vertical to the center line of the cup body. As shown in fig. 9, the connecting portion 17 is shielded by the body 16 so that only the continuous decorative strip is visible on the surface of the preform. The two straight edges of the body 16 are located on the cup body at positions offset from the side of the cup body where the film raising protrusions are located.
The two straight edges of the body 16 and the film-forming protrusions may also be located on the same side of the cup body, thereby forming another embodiment.
Claims (2)
1. A cutting device, characterized in that: the cutting device comprises a lower template (2), an upper template (1) and a driving assembly (3), wherein the upper template (1) is installed on the driving assembly (3) and makes linear reciprocating motion, the lower template (2) is positioned on a linear reciprocating motion path of the upper template (1), a punching shear cutter is arranged on the upper template (1), a punching shear forming channel (8), an inner concave edge cutting edge and an outer convex edge cutting edge are arranged on the punching shear cutter, the inner concave edge cutting edge and the outer convex edge cutting edge are distributed on two sides of the punching shear forming channel (8), the inner concave edge cutting edge comprises an arc-shaped cutting edge I (9) and a linear cutting edge I (10), one end of the arc-shaped cutting edge I (9) is connected with one end of the linear cutting edge I (10), the outer flange cutting edge comprises an arc-shaped cutting edge II (11) and a linear cutting edge II (12), one end of the arc-shaped cutting edge II (11) is connected with one end of the linear cutting edge II (12), the linear cutting edge I (10) between any one inner flange cutting edge and the adjacent outer flange cutting edge is inclined to the linear cutting edge II (12), the circle center of the arc-shaped cutting edge I (9) coincides with the circle center of the arc-shaped cutting edge II (11), the radian of the arc-shaped cutting edge I (9) is larger than that of the arc-shaped cutting edge II (11), the lower die plate (2) is provided with a punching and shearing through hole (4) corresponding to a punching and shearing tool, the punching shear cutter comprises a single-side cutting cutter (5), a double-side cutting cutter I (6) and a double-side cutting cutter II (7), wherein the upper template (1) is provided with two single-side cutting cutters (5), the double-side cutting cutter II (7) is positioned between the two single-side cutting cutters (5), the distance from the double-side cutting cutter II (7) to any single-side cutting cutter (5) is the same, the double-side cutting cutter I (6) is distributed between the double-side cutting cutter II (7) and the single-side cutting cutter (5) in an equidistant arrangement mode, and the distance between the single-side cutting cutter I (6) and the distance between the double-side cutting cutter I (5), the distance between the adjacent double-side cutting cutters I (6), The distance between the two side cutting tools I (6) and the two side cutting tools II (7) is the same, the punching shear forming channels (8) are distributed between the two side cutting tools I (6) and the two side cutting tools 5, between the two adjacent side cutting tools I (6) and between the two side cutting tools I (6) and the two side cutting tools II (7), one side of the two side cutting tools I (5) is provided with an inner concave edge cutting edge, one side of the two side cutting tools I (6) is provided with an inner concave edge cutting edge, the other side of the two side cutting tools I (6) is provided with an outer convex edge cutting edge, two sides of the two side cutting tools II (7) are provided with outer convex edge cutting edges, the inner concave edge cutting edge of the single-side cutting tool (5) is identical to the inner concave edge cutting edge of the double-side cutting tool I (6), the outer concave edge cutting edge of the double-side cutting tool I (6) is identical to the outer concave edge cutting edge of the double-side cutting tool II (7), the inner concave edge cutting edge of the single-side cutting tool (5) is adjacent to the outer concave edge cutting edge of the double-side cutting tool I (6), the inner concave edge cutting edge of the double-side cutting tool I (6) is adjacent to the outer concave edge cutting edge of the double-side cutting tool II (7), the inner concave edge cutting edge of one double-side cutting tool I (6) in the adjacent double-side cutting tool I (6) is adjacent to the outer concave edge cutting edge of the other double-side cutting tool I (6), the upper die plate (1) is provided with a pre-pressing plate (13), the pre-pressing plate (13) is movably mounted on the upper die plate (1) in a sliding mode, the sliding movement direction of the pre-pressing plate (13) relative to the upper die plate (1) is parallel to the linear reciprocating movement direction of the upper die plate (1), and the pre-pressing plate (13) is positioned around the punching shear tool.
2. The cutting device of claim 1, wherein: the length of the single-side cutting tool (5) and the length of the double-side cutting tool II (7) are both greater than the length of the double-side cutting tool I (6).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910621700.5A CN110421643B (en) | 2019-07-10 | 2019-07-10 | Cutting device |
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|---|---|---|---|
| CN201910621700.5A CN110421643B (en) | 2019-07-10 | 2019-07-10 | Cutting device |
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| CN110421643A CN110421643A (en) | 2019-11-08 |
| CN110421643B true CN110421643B (en) | 2024-05-28 |
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| CN201910621700.5A Active CN110421643B (en) | 2019-07-10 | 2019-07-10 | Cutting device |
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