CN210939655U

CN210939655U - Cutting device

Info

Publication number: CN210939655U
Application number: CN201921075509.7U
Authority: CN
Inventors: 史中伟; 史正; 樊杰飞
Original assignee: Hangzhou Zhongya Machinery Co Ltd
Current assignee: Hangzhou Zhongya Machinery Co Ltd
Priority date: 2019-07-10
Filing date: 2019-07-10
Publication date: 2020-07-07
Anticipated expiration: 2029-07-10

Abstract

The utility model discloses a cutting device, this cutting device include lower bolster, cope match-plate pattern and drive assembly, the cope match-plate pattern is installed on drive assembly and is straight reciprocating motion, the lower bolster is located the straight reciprocating motion's of cope match-plate pattern route, be equipped with the punching shear cutter on the cope match-plate pattern, be equipped with the punching shear through-hole that corresponds the punching shear cutter on the lower bolster. The cutting device can provide die cutting operation including strip separation and trimming for the decorative sheet material, and the decorative sheet material can be directly processed into a strip of separated strip-shaped decorative strips with trimmed edges through the cutting device, so that the utilization rate of the decorative sheet material is improved, and waste materials are reduced.

Description

Cutting device

Technical Field

The utility model relates to a cutting device especially relates to the cutting device of the ornamental strip on the prefabricated cup of production.

Background

The prefabricated cup obtained by heating and shaping the plastic sheet is a cup shape with 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 out of the periphery of the cup body, and the outer contour of the cup edge has the shape which is the same as that of the cross section of the cup body and also has the shape difference with that of the cross section of the cup body; the design purpose of the cup rim is to realize the carrying and packaging in the continuous conveying, sealing after filling and selling stages in the forming process, the design purpose of the cup body is to accommodate materials, the main display part of the cup-shaped design and the main display part of the packaging design, and therefore the overall appearance of the prefabricated cup is mainly restricted by the cup body structure. The cup body of the common prefabricated cup has a cylindrical structure, an inverted round table-shaped structure, a rectangular parallelepiped structure with round corners and a spherical structure. In order to be matched with the prefabricated cup for sale, a decorative strip is usually arranged on the cup body of the prefabricated cup, the decorative strip surrounds the cup body for a circle, and product information, enterprise information and other designs which are beneficial to improving the appearance significance of the product are printed on the surface of the decorative strip. The structure formed by integrally curling the decorative strip is completely matched with the surface structure of the cup body, only the decorative strip can be attached to the cup body, and the decorative strip can display information and express the appearance characteristics of the cup body.

The used decorative strip is curled into an inverted round table shape, namely the upper part of the curled decorative strip is wide and the lower part of the curled decorative strip is narrow. The decorative strip is in a fan-ring-shaped structure after being spread and unfolded, the decorative strip is provided with two circular arc-shaped edges and two straight edges, the two straight edges are positioned at the end part of the decorative strip, and one end of the decorative strip is connected with the other end after being curled, so that the two straight edges are tightly connected together.

In the prior art, the manufacture and processing of the decorative strip which is curled into an inverted round table-shaped structure needs to be subjected to strip cutting, trimming and section cutting. Firstly, cutting a sheet with a larger width into a continuous sheet with a smaller width; then cutting the edge of the continuous sheet with smaller width to form an inward-concave arc edge, an outward-convex arc edge and a short straight edge, thus forming the continuous sheet to be cut, wherein the fan-shaped part and the isosceles triangle part are alternately arranged; and finally, cutting the isosceles triangle part to obtain the fan-shaped decorative strip from the continuous sheet to be cut, and discharging the cut triangular part as waste. Obviously, the quantity of waste materials is consistent with that of the decorative strips, and the utilization rate of materials for producing the decorative strips is low; and the decorative sheet greatly wastes materials by trimming after slitting, and the utilization rate of materials for producing the decorative strip becomes lower.

The decorative strip obtained by cutting is pushed into a label feeding die of the label rolling mechanism under the clamping and driving of the roller, and a storage cavity for storing the decorative strip is arranged in the label feeding die. The decorative strip can only move by being clamped and pushed by the roller after being cut. In order to ensure that the decorative strip can completely enter the storage cavity, the roller is arranged on the label feeding die, and the cutter for cutting the isosceles triangle part is also 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 obtained decorative strip can enter the storage cavity under the pushing action of the cutter. This results in a very complex supply structure for the decorative strip.

Although the decorative strip is curled inside the marking die, and the outer side of the decorative strip is limited by the marking die, 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.

And after the mark feeding die is fully loaded with the decorative strip, the mark feeding die moves to the position above the forming die, the push rod extends into the storage cavity, and one end of the push rod is in contact with the decorative strip in a curling state and pushes the decorative strip to move towards the position of the forming die. Until the trim strip is pushed into the mold cavity of the forming mold and the trim strip is pressed to fit within the mold cavity. Because the inner cavity of the decorative strip is tightly attached to the inner wall of the label feeding mold, the decorative strip is very thin, accidents can occur when the push rod pushes the decorative strip, and the accidents comprise that the edge of the decorative strip is stressed and deformed to be embedded into a gap between the push rod and the label feeding mold, 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 printed information on the surface of the decorative strip is abraded. 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 influenced finally.

The shaping mould carrying the decorative strip is placed at a preform cup shaping station by extruding the heated plastic sheet and then forming the preform cup while the decorative strip is bonded to the preform cup. A decorative strip is provided on the preformed cup. The decorative strip is curled on the cup body, two ends of the decorative strip are connected together, and the straight edge of one end of the decorative strip is next to the straight edge of the other end of the decorative strip. The thickness of the cup body and the decoration strip is the same.

Due to the specific thermal forming process of the prefabricated cup, the wall thickness of the cup edge of the prefabricated cup is determined to be larger than that 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 by the decorative strip, but the pressure applied to the cup body by a thumb when a user holds the cup body in the operation of opening the prefabricated cup cannot be resisted, and a small amount of deformation exists in most cases. The use experience brought by the defect of inconvenient use of the product for the consumer can weaken the overall image of the product in the impression of the consumer, and is very unfavorable for the long-term operation of enterprises.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is how to avoid the operating procedure of trimming behind the slitting in the decorative sheet course of working, obtain a cutting device from this.

In order to solve the technical problem, the utility model adopts the following technical scheme: the cutting device comprises a lower template, an upper template and a driving assembly, wherein the upper template is installed on the driving assembly and linearly reciprocates, the lower template is located on the path of the linearly reciprocates of the upper template, a punching and shearing cutter is arranged on the upper template, a punching and shearing forming channel, an inner concave edge cutting blade and an outer convex edge cutting blade are arranged on the punching and shearing cutter, the inner concave edge cutting blade and the outer convex edge cutting blade are distributed on two sides of the punching and shearing forming channel, the inner concave edge cutting blade comprises an arc-shaped cutting blade I and a linear cutting blade I, one end of the arc-shaped cutting blade I is connected with one end of the linear cutting blade I, the outer convex edge cutting blade comprises an arc-shaped cutting blade II and a linear cutting blade II, one end of the arc-shaped cutting blade II is connected with one end of the linear cutting blade II, and the linear cutting blade I between any one inner concave edge cutting blade and the adjacent outer convex edge cutting blade inclines to the, 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 the lower template is provided with punching and shearing through holes corresponding to punching and shearing cutters.

According to the technical scheme, the decorative sheet is processed in a die cutting mode, the direction of cutting operation obtained in the mode is wider than that of cutting operation in a hob cutting mode, the die cutting mode and the decorative sheet are cooperated through the step motion of the decorative sheet, and the step motion is just consistent with the work rhythm of other equipment for producing the decorative strip, so that all equipment in the technical scheme has good compatibility, and special debugging operation is not needed. By the die cutting mode, a plurality of decorative strips can be formed, and the edges of the decorative strips can be cut, so that the decorative sheet can be directly processed into a strip of separated strip-shaped decorative strips with trimmed edges by the cutting device.

As the utility model is preferable, the punching shear cutter comprises a unilateral cutting cutter, a bilateral cutting cutter I and a bilateral cutting cutter II, the upper template is provided with two unilateral cutting cutters, the bilateral cutting cutter II is positioned between the two unilateral cutting cutters, the distance between any one unilateral cutting cutter and any one bilateral cutting cutter is the same as the bilateral cutting cutter II, the bilateral cutting cutters I are distributed between the bilateral cutting cutter II and the unilateral cutting cutter in an equidistant arrangement mode, the distance between the unilateral cutting cutter and the bilateral cutting cutter I, the distance between the adjacent bilateral cutting cutters I and the distance between the bilateral cutting cutter I and the bilateral cutting cutter II are the same, the punching shear forming channel is distributed between the unilateral cutting cutter and the bilateral cutting cutter I, between the adjacent bilateral cutting cutter I, between the bilateral cutting cutter I and the bilateral cutting cutter II, one side of the single-side cutting tool is provided with an inner concave edge cutting blade, one side of the double-side cutting tool I is provided with an inner concave edge cutting blade, the other side of the double-side cutting tool I is provided with an outer convex edge cutting blade, the two sides of the double-side cutting tool II are provided with outer convex edge cutting edges, the inner concave edge cutting edge of the single-side cutting tool is identical to the inner concave edge cutting edge of the double-side cutting tool I in structure, the outer convex edge cutting edge of the double-side cutting tool I is identical to the outer convex edge cutting edge of the double-side cutting tool II in structure, the concave edge cutting blade of the unilateral cutting tool is adjacent to the outer convex edge cutting blade of the bilateral cutting tool I, the concave edge cutting blade of the bilateral cutting tool I is adjacent to the outer convex edge cutting blade of the bilateral cutting tool II, and the concave edge cutting blade of one bilateral cutting tool I in the adjacent bilateral cutting tool I is adjacent to the outer convex edge cutting blade of the other bilateral cutting tool I.

The prepressing plate is arranged on the upper template and movably mounted on the upper template in a sliding mode, the sliding motion direction of the prepressing plate relative to the upper template is parallel to the linear reciprocating motion direction of the upper template, and the prepressing plate is positioned around the punching and shearing tool. The pre-press plate operates in contact with the decorative sheet material earlier than the punching tool, thereby providing better operating conditions for the die cutting of the punching tool.

The length of the unilateral cutting tool and the length of the bilateral cutting tool II are both larger than the length of the bilateral cutting tool I. During die cutting, the length of the unilateral cutting tool and the bilateral cutting tool II firstly enter the lower template, and meanwhile, the guiding effect is achieved, and the smooth die cutting of the bilateral cutting tool I is facilitated.

The utility model adopts the above technical scheme: the cutting device can provide die cutting operation including strip separation and trimming for the decorative sheet material, and the decorative sheet material can be directly processed into a strip of separated strip-shaped decorative strips with trimmed edges through the cutting device, so that the utilization rate of the decorative sheet material is improved, and waste materials are reduced.

Drawings

The present invention will be further described with reference to the accompanying drawings and the following detailed description.

Fig. 1 is a schematic structural 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 device according to the present invention;

fig. 4 is a perspective view of a lower template of the cutting device of the present invention;

fig. 5 is an assembly schematic view of an upper mold plate and a lower mold plate of the cutting device of the present invention;

fig. 6 is a schematic view of a cutting device according to the present invention;

fig. 7 is a schematic structural view of a strip-shaped decoration strip produced by the cutting device of the utility model;

fig. 8 is a schematic view of the use of an adsorption type label rolling mechanism required for producing a prefabricated cup by using a long strip-shaped decoration strip produced by the cutting device of the present invention;

fig. 9 is a schematic structural diagram of a strip-shaped decoration strip produced by the cutting device of the present invention used on a prefabricated cup after being cut off.

Detailed Description

The production of the prefabricated cup comprises the steps of producing the decorative strip, supplying the decorative strip and thermoforming the prefabricated cup, wherein the decorative strip is directly supplied to the thermoforming link of the prefabricated cup.

The production raw material of the decorative strip is a decorative sheet with a large width wound on a roll shaft, the decorative sheet is cut into a plurality of strip-shaped decorative strips, and the number of the strip-shaped decorative strips is even in order to match the technical requirements of the prefabricated cup thermoforming.

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 assembly 3 and a frame. Four guide posts which are parallel to each other are arranged on the rack, the guide posts penetrate through the upper template 1, and the upper template 1 and the guide posts can be movably connected in a sliding mode. The lower template 2 is fixed on the frame; the driving assembly 3 is provided with a linear cylinder, a cylinder body of the linear cylinder is fixed on the rack, a piston rod of the linear cylinder is connected with the upper template 1, the driving assembly 3 drives the upper template 1 to do linear reciprocating motion along the guide pillar, and the lower template 2 is located on a path of the linear reciprocating motion of the upper template 1.

The upper template 1 is provided with punching and shearing cutters which are positioned on one side of the upper template 1 and face the position of the lower template 2. The lower template 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 4, so that the decorative sheet can be subjected to die cutting operation.

The punching and shearing 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 unilateral cutting tool 5 and the length of the bilateral cutting tool II 7 are both larger than the length of the bilateral cutting tool I6.

The upper template 1 is provided with two unilateral cutting tools 5, the bilateral cutting tool II 7 is located in the middle of the two unilateral cutting tools 5, and the distance from the bilateral cutting tool II 7 to any unilateral cutting tool 5 is the same. The double-side cutting tools I6 are distributed between the double-side cutting tool II 7 and the single-side cutting tool 5 in an equidistant arrangement mode, and the distance between the single-side cutting tool 5 and the double-side cutting tool I6, the distance between adjacent double-side cutting tools I6 and the distance between the double-side cutting tool I6 and the double-side cutting tool 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 two-side cutting tool I6 located on one side of the two-side cutting tool II 7 and the two-side cutting tool I6 located on the other side of the two-side cutting tool II 7 are in mirror symmetry relative to the central line located on the two-side cutting tool II 7, and the number of the two-side cutting tool I6 located on one side of the two-side cutting tool II 7 is equal to the number of the two-side cutting tool I6 located on the other side of the two-side cutting tool II 7.

And space areas which are punching shear forming channels 8 are formed between the single-side cutting tool 5 and the double-side cutting tool I6, between the 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 unilateral cutter 5 is equipped with indent limit cutting edge, and one side that both sides cut cutter I6 is equipped with indent limit cutting edge, and the opposite side that both sides cut cutter I6 is equipped with outer chimb cutting edge, and both sides that both sides cut cutter II 7 all are equipped with outer chimb cutting edge. The structure of the inner concave edge cutting blade of the single-side cutting tool 5 is the same as that of the inner concave edge cutting blade of the double-side cutting tool I6, and the structure of the outer convex edge cutting blade of the double-side cutting tool I6 is the same as that of the outer convex edge cutting blade of the double-side cutting tool II 7; the concave edge cutting blade of the unilateral cutting tool 5 is adjacent to the outer convex edge cutting blade of the bilateral cutting tool I6, the concave edge cutting blade of the bilateral cutting tool I6 is adjacent to the outer convex edge cutting blade of the bilateral cutting tool II 7, and the concave edge cutting blade of one bilateral cutting tool I6 of the adjacent bilateral cutting tools I6 is adjacent to the outer convex edge cutting blade of the other bilateral cutting tool I6. Therefore, both the concave edge cutting blade and the convex edge cutting blade are distributed on both sides of the punch forming passage 8. The concave edge cutting knife edge comprises an arc-shaped knife edge I9 and a linear knife edge I10, and one end of the arc-shaped knife edge I9 is connected with one end of the linear knife edge I10; the outer convex edge cutting knife edge comprises an arc-shaped knife edge II 11 and a linear knife edge II 12, and one end of the arc-shaped knife edge II 11 is connected with one end of the linear knife edge II 12. The straight line cutting edge I10 between arbitrary indent limit cutting edge and the adjacent outer flange cutting edge is inclined to the centre of a circle of straight line cutting edge II 12, arc cutting edge I9 and the centre of a circle coincidence of arc cutting edge II 11, and the radian of arc cutting edge I9 is greater than the radian of arc cutting edge II 11.

The upper template 1 is provided with a prepressing plate 13. The prepressing plate 13 is movably mounted on the upper die plate 1 in a sliding manner, and the prepressing plate 13 is located around the punching and shearing tool. A guide post and a reset spring are arranged between the prepressing plate 13 and the upper template 1, one end of the guide post is fixedly connected with the prepressing 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 prepressing 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, the central line of the guide post is parallel to the linear reciprocating direction of the upper template 1, and therefore the sliding motion direction of the prepressing plate 13 relative to the upper template 1 is parallel to the linear reciprocating direction of.

In the initial state, the punching and shearing cutter of the cutting device is far away from the lower template 2. Before cutting, firstly, a section of decorative sheet extends out in the conveying direction, the decorative sheet extends into a position between the punching shear cutter and the lower template 2 in a horizontal posture, and the decorative sheet is placed on the lower template 2; when cutting is started, the punching and shearing tool moves to the position of the decorative sheet, the prepressing plate 13 is in contact with the decorative sheet before the punching and shearing tool, and the prepressing plate 13 tightly presses the decorative sheet on the lower template 2; when cutting, the punching shear cutter compresses the decorative sheet, and the part of the decorative sheet, which is tightly contacted with the cutting edge of the inner concave edge and the cutting edge of the outer convex edge, is subjected to the shearing force; after cutting, the decorative sheet is formed with a profile corresponding to the concave edge cutting blade and the convex edge cutting blade, and the waste material obtained by cutting is discharged from the punching shear forming passage 8. Then, the cutting device is returned to the initial state, and the sheet to be decorated is fed out in the same direction for a distance corresponding to the length of the die-cutting forming passage 8, and the decorative sheet is cut and divided into a plurality of elongated decorative strips by repeating the above-described cutting operation, as shown in fig. 6.

As shown in fig. 7, the strip-shaped decorative strip is provided with fan-shaped portions 14 and isosceles triangle portions 15, the fan-shaped portions 14 and the isosceles triangle portions 15 are alternately arranged, the straight edges of the fan-shaped portions 14 are connected with the waists of the isosceles triangle portions 15, and the length of the straight edges of the fan-shaped portions 14 is equal to the length of the waists of the isosceles triangle portions 15. The base of the isosceles triangle portion 15 is parallel to the conveying direction of the strip-shaped decorative strip.

And in the decoration strip supplying stage, the long strip decoration strips pass through the winding alignment station and then are input into the transverse cutting station.

A winding alignment member is provided at the winding alignment station, and a winding reel is provided in the winding alignment member, and the winding reel is arranged to form a transport path for transporting the decorative strip, for example, a method for supplying the decorative strip and a winding alignment member described in the die cutting member, which are disclosed in chinese patent No. CN106625863A published 5/10/2017, are known as a method for supplying the decorative strip and a winding alignment member suitable for the method. The strip-shaped decorative strips enter the winding alignment component after being turned into a vertical posture, the number of the strip-shaped decorative strips is even, and the turning direction of one half of the strip-shaped decorative strips is opposite to that of the other half of the strip-shaped decorative strips. The overturning operation can ensure that the printed information on the surface of the decorative strip can be exposed out of the surface of the cup body.

The long strip-shaped decorative strip enters a transverse cutting station after passing through a winding alignment station, a transverse cutting device is arranged on the transverse cutting station, the transverse cutting device can adopt the technical scheme that the patent name of Chinese patent No. CN105253685A published in 2016, 1, 20 is adopted as a label cutting device, the spatial posture of a straight cutting edge required by shearing is adjusted to be an inclined posture, and the inclined angle of the cutting edge is the same as the base angle of the isosceles triangle part 15 on the long strip-shaped decorative strip. After the decorative strip is input into the transverse cutting device, the connecting part of the fan-shaped part 14 and the isosceles triangle part 15 of the strip-shaped decorative strip, namely the waist part of the isosceles triangle part 15, is cut off by the transverse cutting device, and the strip-shaped decorative strip is cut in equal length to form a single decorative strip which is integrally in an arch structure; the long-strip decorative strip makes stepping movement, and the length of the decorative strip entering the transverse cutting device every time is equal to the length of the single-section decorative strip which is integrally in an arch structure and also equal to the length of the punching and shearing forming channel 8. Due to the coordination function of the winding alignment part, the length difference between the longitudinal cutting station and the transverse cutting station of any two strip-shaped decorative strips is integral multiple of the length of a single independent section of the decorative strip which is integrally in an arch structure, and some decorative strips have the same length and some decorative strips have different lengths.

As shown in fig. 8, the single-segment decorative strip with an overall arch structure comprises a body 16 and a connecting portion 17, wherein the body 16 is in a fan-ring shape, and the connecting portion 17 is in an isosceles triangle shape. The straight edge of one end of the body 16 and the straight edge of the other end of the body 16 are in mirror symmetry with respect to the center line of the body 16, the waist of the connecting portion 17 is connected with the straight edge of 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 of one end of the body 16. The center of the arc edge of the side of the body 16 that protrudes outward coincides with the center of the arc edge of the side of the body 16 that is recessed inward, and the radian of the arc edge of the side of the body 16 that protrudes outward is less than the radian of the arc edge of the side of the body 16 that is recessed inward. The arc edge of the side of the body 16 which is convex outwards is obtained by processing the convex edge cutting blade in the cutting device, and the arc edge of the side of the body 16 which is concave inwards and the bottom edge of the connecting part 17 are obtained by processing the concave edge cutting blade in the cutting device. As shown in fig. 8, the edge of the connecting portion 17 is located between the tangent line of the end of the arc edge of the side of the body 16 protruding outward at the straight edge of the body 16 and the tangent line of the arc edge of the side of the body 16 protruding inward at the straight edge of the body 16 at the end. The straight edge of the other end of the body 16 is parallel to and of the same length as the other waist of the connecting portion 17, so that it can be seen that the outline of the edge of the one end of the trim strip in the width direction is the same as the outline of the edge of the other end of the trim strip in the width direction as a whole.

Since the waist of the connecting portion 17 of the ornamental strip to be single-sectioned is cut off from the straight edge of the body 16 of the ornamental strip that has been single-sectioned at each cutting, the decorative strip upper connecting portion 17 of the single-sectioned is located forward of the body 16 in the ornamental strip conveying direction.

The single-section decoration strip integrally in an arch structure is obtained by cutting, and is input into an adsorption type label rolling mechanism, the adsorption type label rolling mechanism can adopt the technical scheme that the patent name with the publication number of CN105151446A, which is published in 12, 16 and 12 months in 2015 of Chinese patent, is an adsorption type label rolling mechanism, and the mold cavity of a forming mold is set to be in a circular truncated cone shape. After the decorative strip enters the adsorption type label rolling mechanism, the cylindrical label rolling mold core 18 absorbs the decorative strip and rolls up the decorative strip, so that the decorative strip is rolled around the side surface of the label rolling mold core 18 to form a structure that one end of the body 16 covers the end, connected with the connecting part 17, of the body 16, namely, one end of the body 16 covers the other end of the body 16. Then, the label rolling die core 18 stops rotating and the negative pressure disappears, the pushing component 19 in the absorption label rolling mechanism pushes the curled decorative strip into the die cavity of the forming die, the curled decorative strip in the die cavity is extruded and unfolded to form a circular truncated cone shape, one end of the body 16 covers the connecting part 17, the straight edge of one end of the body 16 is connected with the straight edge of the other end of the body 16, namely the two straight edges are overlapped in the direction vertical to the central line of the die 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 edge, a cup body and a decorative strip, wherein the cup edge and the cup body are of an integrated structure, the cup body is of an inverted round platform-shaped structure, the cup edge 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 edge is of an overall annular structure and is provided with a film raising protrusion which has a larger width and extends in the radial direction, and the decorative strip is arranged on the cup body in a curling state; one end of the body 16 of the decoration strip covers the connecting part 17 and is connected with the connecting part 17 to be curled into an inverted circular truncated cone shape, and the straight edge of one end of the body 16 is connected with the straight edge of the other end of the body 16, namely the two straight edges are overlapped in the direction vertical to the central line of the cup body. As shown in fig. 9, the connecting portion 17 is hidden by the body 16, so that only a continuous decorative strip is visible from the surface of the preform cup. The two straight edges of the body 16 are positioned on the cup body at a position offset from the side of the cup body where the film-raising protrusion is located.

The two straight edges of the body 16 and the film forming protrusions can also be located on the same side of the cup body, thereby forming another embodiment.

Claims

1. A cutting device characterized by: 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 linearly reciprocates, the lower template (2) is positioned on the path of the linear reciprocating motion of the upper template (1), a punching and shearing cutter is arranged on the upper template (1), a punching and shearing forming channel (8), an inner concave edge cutting blade and an outer convex edge cutting blade are arranged on the punching and shearing cutter, the inner concave edge cutting blade and the outer convex edge cutting blade are distributed on two sides of the punching and shearing forming channel (8), the inner concave edge cutting blade comprises an arc-shaped blade I (9) and a linear blade I (10), one end of the arc-shaped blade I (9) is connected with one end of the linear blade I (10), the outer convex edge cutting blade comprises an arc-shaped blade II (11) and a linear blade II (12), one end of the arc-shaped blade II (11) is connected with one end of the linear blade II (12), linear cutting edge I (10) between arbitrary one indent limit cutting edge and the adjacent outer flange cutting edge is inclined to the centre of a circle of linear cutting edge II (12), arc cutting edge I (9) and the centre of a circle coincidence of arc cutting edge II (11), the radian of arc cutting edge I (9) is greater than the radian of arc cutting edge II (11), be equipped with on lower bolster (2) and correspond towards punching shear through-hole (4) of punching shear cutter.

2. The cutting device of claim 1, wherein: 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 between the double-side cutting cutter II (7) and any one single-side cutting cutter (5) is the same, the double-side cutting cutters I (6) are distributed between the double-side cutting cutter II (7) and the single-side cutting cutter (5) in an equidistant arrangement mode, the distance between the single-side cutting cutter (5) and the double-side cutting cutter I (6), the distance between the adjacent double-side cutting cutters I (6), the distance between the double-side cutting cutter I (6) and the double-side cutting cutter II (7) are the same, and a punching shear forming channel (8) is distributed between the single-side cutting cutter (5) and the double-side cutting cutter I (, The double-edge cutting device comprises a double-edge cutting tool I (6), a double-edge cutting tool I (6) and a double-edge cutting tool II (7), wherein an inner concave edge cutting blade is arranged on one side of the single-edge cutting tool I (5), an inner concave edge cutting blade is arranged on one side of the double-edge cutting tool I (6), an outer convex edge cutting blade is arranged on the other side of the double-edge cutting tool I (6), outer convex edge cutting blades are arranged on two sides of the double-edge cutting tool II (7), the inner concave edge cutting blade of the single-edge cutting tool (5) and the inner concave edge cutting blade of the double-edge cutting tool I (6) are identical in structure, the outer convex edge cutting blade of the double-edge cutting tool I (6) and the outer convex edge cutting blade of the double-edge cutting tool II (7) are identical in structure, and the inner concave edge cutting blade of the single-edge cutting tool (5) and the outer convex edge cutting blade of the double, The concave edge cutting knife edge of the bilateral cutting tool I (6) is adjacent to the convex edge cutting knife edge of the bilateral cutting tool II (7), and the concave edge cutting knife edge of one bilateral cutting tool I (6) in the adjacent bilateral cutting tools I (6) is adjacent to the convex edge cutting knife edge of the other bilateral cutting tool I (6).

3. The cutting device of claim 1, wherein: the upper die plate (1) is provided with a prepressing plate (13), the prepressing plate (13) is movably mounted on the upper die plate (1) in a sliding mode, the sliding motion direction of the prepressing plate (13) relative to the upper die plate (1) is parallel to the linear reciprocating motion direction of the upper die plate (1), and the prepressing plate (13) is positioned around a punching and shearing cutter.

4. The cutting device of claim 2, wherein: the length of the unilateral cutting tool (5) and the length of the bilateral cutting tool II (7) are both larger than the length of the bilateral cutting tool I (6).