CN219235534U - Punching die - Google Patents

Abstract

A punching die (1), characterized in that it comprises: upper die assembly (10), comprising: an upper die plate (110), and a blade holder (120) fixed to the upper die plate (110); and a lower die assembly (20) comprising: a lower die plate (210), and a support plate (220) fixed to the lower die plate (210); wherein the lower die assembly (20) further comprises a plurality of discrete cutter modules (30), each cutter module corresponding to a unit of part (90) to be die cut located between the upper die assembly (10) and the lower die assembly (20), the cutter modules (30) each comprising: a blade fixing plate (310) slidably supported on the support plate (220); and a blade plate (320) fixed to the blade plate fixing plate and having a blade (330) positioned thereon.

Description

Punching die

Technical Field

The utility model relates to the field of punching dies, in particular to a punching die for multi-cavity paper-plastic products.

Background

Packaging of products using, for example, paper-plastic products is becoming increasingly common in modern society. For example, a common example is a paper tray for carrying products in electronic product packaging boxes such as cell phones, personal tablets, and the like. Taking the manufacture of such trays as an example, it is generally processed by cutting a blank including a plurality of trays, which is formed by pressing, using a punching die.

At present, a multi-cavity cutting die for cutting paper-plastic products is usually fixed in center distance and immovable, when the products distributed in multiple cavities are cut, the shrinkage of the products after hot pressing is unstable, uneven edges of the products at the cutting position are easily caused, and the problems of product size edges typically occur, for example, and the cutting die is difficult to debug. In addition, often use back locate mode when fixing a position paper mould the product in the cutting process, and the back of paper mould the product is the guipure, can lead to the positioning accuracy poor, further causes the product size deviation of cutting department great.

Disclosure of Invention

The present utility model aims to propose a punching die which overcomes the above drawbacks. The punching die according to the present utility model is characterized in that the punching die comprises:

an upper die assembly, comprising:

the upper template is arranged on the upper surface of the upper template,

a knife holder fixed to the upper die plate,

a lower die assembly, comprising:

the lower die plate is provided with a lower die plate,

a support plate fixed on the lower die plate,

wherein the lower die assembly further comprises a plurality of discrete cutter modules, each cutter module corresponding to a unit of part to be die cut between the upper die assembly and the lower die assembly, the cutter modules each comprising:

a blade fixing plate slidably supported on the support plate,

a blade plate fixed to the blade plate fixing plate and having a blade positioned thereon.

In contrast to prior art knife boards having a one-piece form, the horizontal position (position in the XY plane) of a plurality of discrete and slidable cutter units relative to the support plate can be adjusted when the upper and lower dies are engaged for the cutting operation, i.e. the cutter modules can be slid in translation. Thus, the problem of uneven edges (size edges) of the product units is well solved.

Preferably, the cutter module is supported on the support plate in translational movement relative thereto.

Preferably, the blade fixing plate is slidably supported on the support plate by a rolling assembly. The provision of the rolling assembly effectively reduces the frictional forces between the blade-holding plate and the support member, facilitating relative sliding therebetween, i.e. sliding translation of the cutter module with only small lateral forces (forces in the XY plane) experienced by the cutter module. In addition, by providing a rolling assembly between the upper surface of the support plate and the lower surface of the blade-fixing plate, a gap is established between the two surfaces, whereby the two surfaces do not contact over a large area, more facilitating the relative sliding between the support and the blade-fixing plate.

Preferably, the rolling assembly includes a ball plunger having a body mounted within the backer plate, the head of the ball plunger being slightly higher than an upper surface of the backer plate to support the blade-securing plate.

Preferably, the rolling assembly includes a recess provided on an upper surface of the support plate and a ball positioned in the recess.

Preferably, the cutter module includes a sliding limit pin passing through a first blade through hole in the blade and a first fixing plate through hole in the blade fixing plate in sequence and fixed to the support plate, and wherein the diameters of the first blade through hole and the first fixing plate through hole are greater than the diameter of the main body of the sliding limit pin.

Preferably, the cutter module comprises a plurality of sliding limit pins.

Preferably, the tool holder has a receiving space for receiving each unit of the workpiece to be die-cut, and includes a teaching table fixed to the upper die plate, the teaching table being positioned between the upper die plate and the backing plate, and a backing plate.

Preferably, the lower die assembly further comprises a discrete core corresponding to the discrete cutter module, the discrete core being floatably mounted on a corresponding cutter plate.

Preferably, the lower die assembly comprises a floating mounting assembly for the core, the floating mounting assembly comprising a fixed pin comprising a first section located in the core, a second section located in the blade and passing through the blade, and a third section fixed in the blade-securing plate, and a spring, wherein the spring is disposed about the second section.

In use, each cavity of the piece to be die-cut is covered on the core, since the piece to be die-cut has a three-dimensional shape, which when covered on each core will exert a certain transverse force on each core, since the blade-fixing plate, which is fixed relative to the core, is slidingly translated relative to the support plate, such transverse force can actuate the corresponding cutter module to produce a corresponding translation, so that for this unit of the piece to be die-cut, the horizontal position of the corresponding cutter module is adjusted, whereby the centre-to-centre distance between the cutter modules can be adjusted, that is, each unit of the piece to be die-cut is cut with a respective precise centre, solving the problem of the size edges.

Furthermore, the piece to be punched is positioned with its front face contacting the upper surface of the core, i.e. from the front face. Since the core is floatable, when the upper die assembly is pressed down, the workpiece to be die-cut moves downward together with the floating core, and the blade thereby cuts into the workpiece to be die-cut from the lower direction, accurate positioning and high cutting accuracy are achieved.

Drawings

Fig. 1 shows a schematic perspective exploded view of a piercing die according to the utility model;

fig. 2 shows a schematic perspective view of a punching die with 3 cavities, wherein the knife plate of the middle cutter module is not shown to show more clearly the constructional details, and the rightmost cutter module is not shown to show more clearly one embodiment of the rolling assembly;

FIG. 3 shows a schematic partial perspective view of a lower die assembly of a piercing die according to the utility model;

FIG. 4 shows a schematic cross-sectional view of a piercing die according to the utility model, taken along a section with a rolling assembly;

fig. 5 shows a schematic cross-sectional view of another embodiment of a rolling assembly according to the utility model;

FIG. 6 shows a schematic cross-sectional view of a cutting die assembly according to the present utility model;

FIG. 7 shows a schematic cross-sectional view of the installation of a floating core according to the present utility model;

fig. 8 shows a schematic cross-sectional view of one of the die assemblies.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model.

Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this utility model belongs. The word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items.

In order to better describe the technical solution according to the utility model, an orthogonal coordinate system XYZ is established, wherein the XY plane formed by the axes X and Y is the plane in which the punching die 1 is placed in the normal operating state, the axis Z being perpendicular to the XY plane and being directed in the forward direction towards the upper die assembly. The terms "upper" and "lower" directions are defined with respect to axis Z.

Referring now to fig. 1, fig. 1 schematically shows an exploded perspective view of a piercing die 1 according to the utility model.

As shown in fig. 1, the piercing die 1 may include an upper die assembly 10 and a lower die assembly 20. The punching die is used for punching paper-plastic products. In normal operating conditions, the lower die assembly 20 is arranged in a plane defined by the axes X and Y, such as a machine plane.

The upper die assembly 10 includes an upper die plate 110, and the upper die plate 110 may be a rectangular plate having a certain thickness, such as an aluminum plate. The upper die assembly 10 further includes a tool holder 120, the tool holder 120 being secured to the upper die plate 110. The blade holder 120 is a portion for receiving a blade when the punching die performs a punching action.

The lower die assembly 20 may include a lower die plate 210, and the lower die plate 210 may also be a rectangular plate having a certain thickness, such as an aluminum plate. The lower die assembly 20 further includes a support plate 220 fixed to the lower die plate 210. The support plate 220 may be used to support the cutter module. This will be described in more detail below.

When the punching die is operated, the workpiece 90 to be punched is disposed between the upper die assembly 10 and the lower die assembly 20, and the upper die plate 110 travels downward together with the tool holder 120 fixed thereto, to be engaged with the lower die assembly 20 to cut the workpiece 90 to be punched into desired units. In the example shown in fig. 1, the part to be die-cut 90 is a multi-cavity part to be die-cut, in particular, it has three cavities, and after being die-cut, the part to be die-cut is cut into three separate units. The workpiece 90 is a paper-plastic product, for example, formed by a wet pressing mold and then subjected to a hot pressing process.

As shown in fig. 1, the tool holder 120 may have a receiving space 125 for receiving each unit of the workpiece 90 to be die-cut. The tool holder 120 may include a teaching table 121 fixed to the upper die plate 110 and a backing plate 122, the teaching table 121 being positioned between the upper die plate 110 and the backing plate 122. The teaching table 121 may be a plate made of a polyvinyl chloride material having a certain thickness, the pad 122 may be a stainless steel plate, a section of the pad 122 along a plane perpendicular to the longitudinal axis Z is substantially the same as a section of the teaching table 121 along a plane perpendicular to the longitudinal axis Z, and the pad 122 and the teaching table 121 together may be fastened to the upper die plate 110 by fixing bolts. The backing plate 122 and the teaching table 121 may be made non-translatable relative to each other by locating pins that at least partially penetrate them.

The lower die assembly 20 of the piercing die 1 according to the present utility model is described below with reference to fig. 1 to 4.

As shown, the lower die assembly 20 further includes a plurality of discrete cutter modules 30, i.e., a plurality of cutter modules independent of each other, each cutter module corresponding to a unit of the workpiece 90 to be die-cut between the upper die assembly 10 and the lower die assembly 20. That is, when performing the punching operation, each cutter module 30 cuts a corresponding unit of the corresponding piece to be punched 90 to cut out an independent product unit.

In the present utility model, the cutter modules 30 each include a blade fixing plate 310 and a blade 320 fixed to the blade fixing plate 310, and the blade 320 has a blade 330 positioned thereon. The blade fixing plate 310 of each of the cutter modules 30 is slidably supported on the support plate 220, whereby each of the cutter modules 30 is slidably supported on the support plate 220.

Here, slidably supporting means that the support plate 220 supports the blade fixing plate 310 of the cutter module 30 in the Z direction, and the blade fixing plate 310 is translationally slidable in the XY plane with respect to the support plate 220. Thereby, each cutter module 30 as a whole is also slidably supported on the support plate 220. That is, the cutter module 30 is supported on the support plate 220 in a translational movement with respect to the support plate 220.

In the prior art, even for multi-cavity parts to be punched, the knife plate has a one-piece form, that is, the position of the knife plate cannot be adjusted for each cavity, the distance between the knife plate unit for each cavity and the center of the wire cutter is fixed and cannot be adjusted. When the unit distribution of the product is not uniform enough, for example, shrinkage instability phenomenon caused by hot pressing, the same piece to be punched can be cut into product units with uneven edges during cutting. In contrast to prior art knife boards having a one-piece form, the horizontal position (position in the XY plane) of a plurality of discrete and slidable cutter units relative to the support plate can be adjusted when the upper and lower dies are engaged for the cutting operation, i.e. the cutter modules can be slid in translation. Thus, the problem of uneven edges (size edges) of the product units is well solved.

In the present utility model, the blade fixing plate 310 is slidably supported on the support plate 220 by a rolling assembly. The provision of the rolling assembly effectively reduces the frictional forces between the blade-holding plate and the support member, facilitating relative sliding therebetween, i.e. sliding translation of the cutter module with only small lateral forces (forces in the XY plane) experienced by the cutter module. The rolling assembly according to the present utility model is described in detail below by referring to fig. 2 to 5.

Fig. 2 to 4 show one embodiment of a rolling assembly according to the utility model, namely a rolling assembly 50.

Specifically, fig. 2 is a schematic perspective view of a part of the components of the lower die assembly 20 of the piercing die 1 of the present utility model. Corresponding to the case where the piece to be die-cut 90 has three cavities. In fig. 2, the knife plate of the middle cutter module is not shown to more clearly show the structural details, and the rightmost cutter module is not shown to more clearly show one embodiment of the rolling assembly.

Figure 3 shows in perspective one of the cutter modules 30 and the rolling assembly below the adjacent cutter module (not shown). Fig. 4 shows in cross-section a piercing die according to the utility model, the cross-section being taken in a plane parallel to the Z-direction through the rolling assembly 50.

In the embodiment of fig. 2-4, the rolling assembly 50 includes a ball plunger, the body 51 of which is mounted within the backer plate 220, the head 52 of which is slightly above the upper surface of the backer plate 220 to support the blade-securing plate 310. The head 52 of the ball plunger is a rigid sphere, which may be a stainless steel ball. The interior of the ball plunger may have an internal passage, such as a blind hole, in which a resilient member, such as a coil spring, may be received, one end of the coil spring abutting against the bottom of the internal passage and the other end supporting the head 52 of the ball plunger such that the head 52 abuts against the bottom of the blade fixing plate 310. When the blade fixing plate 310 slides with respect to the support plate 220, the head 52 rolls.

As shown in the figures, for each cutter module 30, a plurality of rolling members 50 uniformly distributed along the circumference of the cutter module may be provided thereto, for example, in fig. 2 and 3, 4 rolling assemblies are provided for each cutter module 30 and positioned near 4 corners of the rectangular cutter fixing plate to provide uniform supporting force for the cutter module 30 so that sliding thereof is smoother.

Another embodiment of a scrolling assembly, namely a scrolling assembly 50', is shown in fig. 5. As shown in fig. 5, the rolling assembly 50 'includes a recess 51' provided on an upper surface of the support plate 220 and balls 52 'positioned in the recess 51'. Similar to the head 52 in the first embodiment, the balls 52' may be rigid spheres. When the blade fixing plate 310 slides with respect to the support plate 220, the balls 52 'roll in the recesses 51'.

By providing a rolling assembly between the upper surface of the support plate 220 and the lower surface of the blade fixing plate 310, a gap is established between the two surfaces, whereby the two surfaces do not contact over a large area, which is more advantageous for the relative sliding between the support and the blade fixing plate.

In addition, in order to limit the amplitude of translation of the cutter module 30 with respect to the support plate 220, the cutter module 30 further includes a sliding limit pin 350 which sequentially passes through a first blade through hole 321 (fig. 6) in the blade 320 and a first fixing plate through hole 311 in the blade fixing plate 310 and is fixed to the support plate 220. The first blade through hole 321 and the first fixing plate through hole 311 may be circular holes having a diameter larger than that of the main body of the sliding limit pin 350. The end portion 351 (fig. 6) of the slide limit pin 350 fixed to the support plate 220 may have threads, and the end portion 351 is threadedly engaged into a threaded hole of the support plate 220. Therefore, the horizontal movement range of the cutter module 30 is determined by the free space between the sliding limiting pin and the through hole, and the cutter module 30 can slide in a smaller limiting range relative to the sliding limiting pin fixed on the supporting plate 220, so that a shaking effect is generated, and the cutting precision is more accurately adjusted, and the technical effect of remarkably improving the precision is achieved.

The cutter modules 30 comprise a plurality of slide limit pins 350, in the example shown in the figures, each cutter module 30 is provided with 4 slide limit pins 350, each located near four corners of, for example, a generally rectangular structure. Thereby making the movement of the cutter module 30 smoother.

The core 80 according to the present utility model is described below with reference to the accompanying drawings. Specifically, the lower die assembly 20 further includes a discrete core 80 corresponding to the discrete cutter module 30, the discrete core 80 being floatably mounted on a corresponding blade plate 320. Fig. 7 shows an example in which three cutter modules 30 correspond to three cores 80. Figure 8 shows a cross-sectional view of a single cutter module 30 with a corresponding core 80 taken in a plane parallel to the Z-direction and through the floating mount assembly.

Specifically, the lower die assembly 20 includes a floating mount assembly 810 for the core 80, the floating mount assembly 810 including a fixed pin 820 and a spring 830. The fixing pin 820 may include a first section 821 in the core 80, a second section 822 in the blade 320 and passing through the blade 320, and a third section 823 fixed in the blade fixing plate 310, around which the spring 830 is disposed. For each core, two fixing pins 820 may be provided, which may be installed near the center position of the core 80 so that the core 80 has a stable floating motion. The first section 821 of the fixing pin 820 may have an enlarged diameter portion that may abut at a recess on the upper surface of the core 80 to provide a limit for upward movement of the core 80. The third portion 830 of the securing pin 820 may have threads that screw into threaded holes in the blade securing plate 310 to effect securing.

In use, each cavity of the workpiece 90 to be die-cut overlies the core 80, since the workpiece 90 to be die-cut has a three-dimensional shape which, when overlying each core 80, imparts a certain lateral force to each core 80, which, due to the sliding translation of the blade-holding plate 310, which is fixed relative to the core 80, relative to the support plate 220, can actuate the corresponding cutter module 30 to produce a corresponding translation, whereby the horizontal position of the corresponding cutter module 30 is adjusted for that unit of workpiece 90 to be die-cut, whereby the centre-to-centre distance between the cutter modules can be adjusted, i.e. each unit of workpiece 90 to be die-cut is cut with a respective precise centre, solving the problem of a large-and-small edge.

In addition, the piece to be die-cut 90 is positioned with its front face contacting the upper surface of the core 80, i.e., from the front face. Since the core 80 is floatable, when the upper die assembly is pressed down, the work to be punched 90 moves downward together with the floating core 80, whereby the blade 330 cuts into the work to be punched 90 from the lower direction, achieving accurate positioning and high cutting accuracy.

Claims (10)

1. A punching die (1), characterized in that it comprises:

upper die assembly (10), comprising:

an upper die plate (110),

a blade holder (120) fixed to the upper die plate (110),

lower die assembly (20), comprising:

a lower die plate (210),

a support plate (220) fixed to the lower die plate (210),

wherein the lower die assembly (20) further comprises a plurality of discrete cutter modules (30), each cutter module corresponding to a unit of part (90) to be die cut located between the upper die assembly (10) and the lower die assembly (20), the cutter modules (30) each comprising:

a blade fixing plate (310) slidably supported on the support plate (220),

a blade (320) secured to the blade securing plate and having a blade (330) positioned thereon.

2. The punching die (1) according to claim 1, characterized in that the cutter module (30) is supported on the support plate (220) in a translatory movement with respect to the support plate (220).

3. The punching die (1) of claim 1, characterized in that the blade-securing plate (310) is slidably supported on the support plate (220) by a rolling assembly (50, 50').

4. A punching die (1) as claimed in claim 3, characterized in that the rolling assembly (50) comprises a ball plunger, the body of which is mounted in the support plate (220), the head of which is slightly higher than the upper surface of the support plate (220) to support the blade fixing plate (310).

5. A punching die (1) according to claim 3, characterized in that the rolling assembly (50') comprises a recess provided on an upper surface of the support plate (220) and a ball positioned in the recess.

6. The cutting die (1) according to any one of claims 2 to 5, wherein the cutter module (30) comprises a sliding limit pin (350) which passes through a first blade through hole in the blade (320) and a first fixing plate through hole in the blade fixing plate (310) in sequence and is fixed to the support plate (220), and wherein the diameters of the first blade through hole and the first fixing plate through hole are larger than the diameter of the main body of the sliding limit pin (350).

7. The punching die (1) of claim 5, characterized in that the cutter module (30) comprises a plurality of sliding limit pins (350).

8. The blanking die (1) according to any one of claims 1 to 5, characterized in that the tool holder (120) has a receiving space (125) for receiving each unit of the piece (90) to be blanked, and comprises a teaching table (121) fixed to the upper die plate (110) and a shim plate (122), the teaching table (121) being positioned between the upper die plate (110) and the shim plate (122).

9. The piercing die (1) of any one of claims 1 to 5, wherein the lower die assembly (20) further comprises a discrete core (80) corresponding to a discrete cutter module (30), the discrete core being floatably mounted on a corresponding cutter plate.

10. The blanking die (1) of claim 9 wherein the lower die assembly (20) includes a floating mount assembly (810) for the core, the floating mount assembly (810) including a fixed pin (820) and a spring (830), the fixed pin including a first section (821) located in the core (80), a second section (822) located in the blade (320) and passing through the blade (320), and a third section (823) fixed in the blade-securing plate (310), wherein the spring (830) is disposed about the second section.

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