CN216610022U

CN216610022U - Shape bending structure of preapring for an unfavorable turn of events for FPC board joggling machine

Info

Publication number: CN216610022U
Application number: CN202122449712.XU
Authority: CN
Inventors: 陈良柱
Original assignee: Suzhou Ruiyi Electronic Technology Co ltd
Current assignee: Suzhou Ruiyi Electronic Technology Co ltd
Priority date: 2021-10-12
Filing date: 2021-10-12
Publication date: 2022-05-27
Anticipated expiration: 2031-10-12

Abstract

An anti-deformation bending structure for an FPC board bending machine comprises an upper die structure assembly and a lower die structure assembly; the lower die structure assembly comprises a fixed seat and a lower die structure; the lower die structure comprises a connecting seat, a lower die component and a reinforcing component. When the carrier structure with the FPC board is moved to the bending structure position, the upper die structure assembly faces downwards and the lower die structure assembly faces upwards according to the bending shape requirement, and the FPC board is bent. In the bending process, the reinforcing component in the lower die structure of the lower die structure assembly moves towards the lower die assembly while the lower die assembly moves upwards, so that when the upper die structure assembly and the lower die structure assembly extrude each other to bend the FPC board, the lower die assembly is supported and reinforced, the strength of the lower die assembly is effectively improved, the deformation of the lower die assembly after multiple times of bending is avoided, and the bending quality of the FPC board is improved.

Description

Shape bending structure of preapring for an unfavorable turn of events of FPC board bending machine

Technical Field

The utility model relates to the field of FPC board production, in particular to an anti-deformation bending structure for an FPC board bending machine.

Background

The FPC board is a flexible printed circuit board having high reliability and excellent properties, which is made of a polyimide or polyester film as a base material, and is widely used in the electronic equipment industry because of its advantages of high wiring density, light weight, thin thickness, good bending property, and the like.

When the bending machine is used for bending the FPC board, the FPC board is required to be placed on a specified carrier structure, and then the FPC board reaches the bending structure position through the feeding structure to be bent at multiple positions. In the bending process, according to the shape requirement of bending as required, an upper die structure of the bending structure moves downwards, a lower die structure moves upwards, and the FPC board is extruded normally, so that the specified bending shape is obtained.

SUMMERY OF THE UTILITY MODEL

Utility model purpose: the utility model aims to provide an anti-deformation bending structure for an FPC board bending machine, which solves the problem of the bending structure of the FPC board bending machine in use.

The technical scheme is as follows: the utility model provides an anti-deformation bending structure for a Flexible Printed Circuit (FPC) board bending machine, which comprises an upper die structure assembly and a lower die structure assembly, wherein the lower die structure assembly is arranged right below the upper die structure assembly; the lower die structure assembly comprises a fixed seat and a lower die structure, wherein the lower die structure comprises a plurality of groups which are arranged on the fixed seat in parallel; the lower die structure comprises a connecting seat, a lower die component and a reinforcing component, wherein the lower die component is arranged on the connecting seat, and the reinforcing component is arranged on the side edge of the connecting seat. When the carrier structure provided with the FPC board moves to the bending structure, the upper die structure assembly faces downwards, the lower die structure assembly faces upwards according to the bending shape requirement, and the FPC board is bent. In the bending process, the reinforcing component in the lower die structure of the lower die structure assembly moves towards the lower die assembly while the lower die assembly moves upwards, so that when the upper die structure assembly and the lower die structure assembly extrude each other to bend the FPC board, the lower die assembly is supported and reinforced, the strength of the lower die assembly is effectively improved, the deformation of the lower die assembly after multiple times of bending is avoided, and the bending quality of the FPC board is improved.

Furthermore, the connecting seat comprises a first connecting plate, a first limiting strip and a second limiting strip, and the first limiting strip and the second limiting strip are arranged on the first connecting plate in parallel; the first limiting strip and the second limiting strip are identical in structure, and a guide strip is arranged on the side edge of the first limiting strip.

Further, the lower die assembly comprises a lower die cylinder, a lower die first plate, a lower die second plate, a lower die third plate, a lower die fourth plate, a lower die cutter fixing seat, a lower die cutter, a lower die first guide structure and a lower die second guide structure, wherein a plunger end of the lower die cylinder is connected with the lower die first plate, the lower die second plate, the lower die third plate and the lower die fourth plate are sequentially connected, the lower die cutter fixing seat is arranged on the lower die fourth plate, the lower die cutter is arranged on the lower die cutter fixing seat, the lower die first guide structure and the lower die second guide structure are arranged on the first connecting plate in parallel, and the end part of the lower die first plate is connected with the lower die first plate.

Furthermore, a first heating rod, a second heating rod and a first temperature sensor are arranged on a third plate of the lower die, the first heating rod and the second heating rod are arranged in the third plate in parallel, and the first temperature sensor is arranged in the middle of the third plate and located between the first heating rod and the second heating rod; the first guide structure of the lower die and the second guide structure of the lower die are the same in structure, the first guide structure of the lower die comprises a first guide pillar and a first guide sleeve, one end of the first guide pillar is connected with the first plate of the lower die, and the other end of the first guide pillar is arranged in the first guide sleeve on the first connecting plate. In the bending process, a lower die air cylinder of the lower die component drives a lower die cutter arranged on a lower die cutter fixing seat to move upwards along a first guide structure of the lower die and a second guide structure of the lower die, and the lower die cutter and an upper die structure assembly are mutually extruded to bend the FPC board. Wherein, set up first heating rod, the second heating rod in lower mould third board and heat to monitor the temperature through a temperature sensor, make the lower mould sword keep the uniform temperature when bending the work, thereby play the design effect to the FPC board, shortened the design time of bending, thereby improved the quality of bending and efficiency of bending.

Further, strengthen the subassembly including strengthening cylinder, fixed plate, second connecting plate, first curb plate, second curb plate, strengthen the cylinder setting on the fixed plate, its plunger end and second connecting plate are connected, first curb plate, second curb plate set up side by side in fixed plate both sides and its one end and second connecting plate are connected. In the bending process, the reinforcing cylinder drives the first side plate and the second side plate to move towards the direction close to the lower die assembly through the second connecting plate along the side edge of the fixing plate, so that when the upper die structure assembly and the lower die assembly are extruded and bent mutually, the first limiting strip and the second limiting strip are located below the first plate, and the supporting effect is achieved.

Further, the first side plate and the second side plate are identical in structure, a guide groove is formed in the side edge of the first side plate, and a chamfer is formed in the end portion of the guide groove. Under the promotion of strengthening the cylinder, its guide way removes along the gib block of first spacing, the spacing of second to first curb plate, second curb plate have improved its shift position precision, have improved and have strengthened the effect. The chamfer of guide way tip is convenient for the block of the guide way of first curb plate, second curb plate and the guide strip of first spacing, the spacing of second.

Furthermore, go up the mould structure assembly and include mould mount, go up the mould structure, it has a plurality of groups to go up the mould structure, sets up side by side on last mould mount. The number of the upper die structures and the number of the lower die structures are determined according to the number of the FPC boards on the carrier structure, and the upper die structures are arranged right above the lower die structures.

Further, go up the die structure and include an upper fixing plate, go up the mould cylinder, go up the mould first board, go up the mould second board, go up the mould third board, go up the mould sword fixing base, go up the mould sword, first gag lever post, second gag lever post, go up the first guide structure of mould, go up the mould second guide structure, go up the mould cylinder and set up on an upper fixing plate, its plunger end and last mould first board are connected, go up the mould first board, go up the mould second board, go up the mould third board and connect gradually, it sets up on last mould third board to go up the mould sword fixing base, it sets up on last mould sword fixing base to go up the mould sword, first gag lever post, second gag lever post set up side by side and lie in mould sword both sides on last mould sword fixing base, go up the first guide structure of mould, go up the mould second guide structure setting on an upper fixing plate and one end and last mould first board connection.

Furthermore, a third heating rod, a fourth heating rod and a second temperature sensor are arranged on a third plate of the upper die, the third heating rod and the fourth heating rod are arranged in the third plate in parallel, and the second temperature sensor is arranged in the middle of the third plate and is positioned between the third heating rod and the fourth heating rod; the upper die first guide structure and the upper die second guide structure are the same in structure, the upper die first guide structure comprises a second guide pillar and a second guide sleeve, one end of the second guide pillar is connected with the upper die first plate, and the other end of the second guide pillar is arranged in the second guide sleeve on the upper die fixing plate. In the bending process, an upper die cylinder of an upper die structure drives an upper die cutter arranged on an upper die cutter fixing seat to move downwards along an upper die first guide structure and an upper die second guide structure, and the upper die cutter and a lower die assembly are mutually extruded to bend the FPC board. When the FPC board is bent by the upper die cutter and the lower die cutter, a certain gap is reserved between the upper die cutter and the lower die cutter, so that the phenomenon that the circuit inside the FPC board is broken due to overlarge extrusion force between the upper die cutter and the lower die cutter is avoided, and loss is reduced. In addition, a third heating rod and a fourth heating rod which are arranged in a third plate of the upper die are used for heating, and the temperature is monitored through a second temperature sensor, so that the second temperature sensor keeps a certain temperature during bending operation, the shaping effect is achieved on the FPC board, and the bending quality and the bending efficiency are improved.

The technical scheme shows that the utility model has the following beneficial effects: 1) the reinforcing assembly is arranged in the lower die structure, so that the strength of the lower die assembly in the bending process is effectively improved, the service life of parts is prolonged, and the bending quality and the bending efficiency of the FPC board are improved; 2) the heating rod and the temperature sensor are arranged in the upper die structure and the lower die assembly, so that the upper die cutter and the lower die cutter are kept in a certain temperature range in the bending process, and a good shaping effect is achieved in the bending process, so that the bending and shaping time is shortened, the bending efficiency is improved, the bending quality of the FPC board is improved, and the product yield is improved; 3) set up the gag lever post in last mould sword both sides to make last mould sword and lower mould sword at the in-process of bending, can keep certain clearance, thereby avoid the inside fracture phenomenon that the too big result in of FPC board atress, thereby reduced the product consume, improved output.

Drawings

FIG. 1 is a perspective view of the present invention;

FIG. 2 is a perspective view of the lower die structure;

FIG. 3 is a perspective view of a first stop bar;

FIG. 4 is a perspective view of the first side panel;

fig. 5 is a perspective view of the upper die structure.

In the figure: an upper die structure assembly 1, an upper die fixing frame 11, an upper die structure 12, an upper die fixing plate 121, an upper die cylinder 122, an upper die first plate 123, an upper die second plate 124, an upper die third plate 125, a third heating rod 1251, a fourth heating rod 1252, a second temperature sensor 1253, an upper die cutter fixing seat 126, an upper die cutter 127, a first limiting rod 128, a second limiting rod 129, an upper die first guide structure 130, a second guide pillar 1301, a second guide sleeve 1302, an upper die second guide structure 131, a lower die structure assembly 2, a fixing seat 21, a lower die structure 22, a connecting seat 221, a first connecting plate 2211, a first limiting strip 2212, a guide strip 22121, a second limiting strip 2213, a lower die component 222, a lower die cylinder 2221, a lower die first plate 2222, a lower die second plate 2223, a lower die third plate 2224, a first heating rod 22241, a second heating rod 22242, a first temperature sensor 22243, a lower die fourth plate 2225, a lower die cutter fixing seat 6, The upper die comprises a lower die knife 2227, a lower die first guide structure 2228, a first guide post 22281, a first guide sleeve 22282, a lower die second guide structure 2229, a reinforcing assembly 223, a reinforcing cylinder 2231, a fixing plate 2232, a second connecting plate 2233, a first side plate 2234, a guide groove 22341, a chamfer 22342 and a second side plate 2235.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the utility model and are not to be construed as limiting the utility model.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise specified, "a plurality" means two or more unless explicitly defined otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Example one

Fig. 1 is a perspective view of the present invention, which includes an upper mold structure assembly 1 and a lower mold structure assembly 2, wherein the lower mold structure assembly 2 is disposed right below the upper mold structure assembly 1; the lower die structure assembly 2 comprises a fixed seat 21 and a lower die structure 22, wherein the lower die structure 22 comprises a plurality of groups which are arranged on the fixed seat 21 in parallel; fig. 2 is a perspective view of the lower mold structure 22, which includes a connecting seat 221, a lower mold assembly 222, and a reinforcing assembly 223, wherein the lower mold assembly 222 is disposed on the connecting seat 221, and the reinforcing assembly 223 is disposed on a side of the connecting seat 221.

The connecting seat 221 includes a first connecting plate 2211, a first limiting strip 2212, and a second limiting strip 2213, wherein the first limiting strip 2212 and the second limiting strip 2213 are arranged in parallel on the first connecting plate 2211; the first and second

limiting strips

2212 and 2213 have the same structure, and as shown in fig. 3, the first limiting strip 2212 is a perspective view, and a guide strip 22121 is disposed on a side edge thereof.

The lower die assembly 222 includes a lower die cylinder 2221, a lower die first plate 2222, a lower die second plate 2223, a lower die third plate 2224, a lower die fourth plate 2225, a lower die cutter holder 2226, a lower die cutter 2227, a lower die first guide structure 2228, and a lower die second guide structure 2229, where a plunger end of the lower die cylinder 2221 is connected to the lower die first plate 2222, the lower die second plate 2223, the lower die third plate 2224, and the lower die fourth plate 2225 are sequentially connected, the lower die cutter holder 2226 is disposed on the lower die fourth plate 2225, the lower die cutter 2227 is disposed on the lower die cutter holder 2226, and the lower die first guide structure 2228 and the lower die second guide structure 2229 are disposed in parallel on the first connecting plate 2211, and an end portion of the lower die first guide structure 2222 is connected to the lower die first plate 2222.

A first heating rod 22241, a second heating rod 22242 and a first temperature sensor 22243 are arranged on the lower third plate 2224, the first heating rod 22241 and the second heating rod 22242 are arranged in parallel in the third plate 2224, and the first temperature sensor 22243 is arranged at the middle position in the third plate 2224 and is positioned between the first heating rod 22241 and the second heating rod 22242; the lower mold first guiding structure 2228 and the lower mold second guiding structure 2229 have the same structure, the lower mold first guiding structure 2228 includes a first guide post 22281 and a first guide sleeve 22282, one end of the first guide post 22281 is connected with the lower mold first plate 2222, and the other end is disposed in the first guide sleeve 22282 on the first connecting plate 2211.

The reinforcing assembly 223 comprises a reinforcing cylinder 2231, a fixing plate 2232, a second connecting plate 2233, a first side plate 2234 and a second side plate 2235, wherein the reinforcing cylinder 2231 is arranged on the fixing plate 2232, the plunger end of the reinforcing cylinder 223is connected with the second connecting plate 2233, the first side plate 2234 and the second side plate 2235 are arranged on two sides of the fixing plate 2232 in parallel, and one end of the first side plate 2234 is connected with the second connecting plate 2233.

The first side plate 2234 and the second side plate 2235 have the same structure, and as shown in fig. 4, the first side plate 2234 is a perspective view of the first side plate 2234, and a guide groove 22341 is formed on a side edge of the first side plate 2234, and a chamfer 22342 is formed at an end of the guide groove 22341.

The upper die structure assembly 1 comprises an upper die fixing frame 11 and an upper die structure 12, wherein the upper die structure 12 comprises a plurality of groups which are arranged on the upper die fixing frame 11 in parallel.

As shown in fig. 5, the upper mold structure 12 is a perspective view, and includes an upper mold fixing plate 121, an upper mold cylinder 122, an upper mold first plate 123, an upper mold second plate 124, an upper mold third plate 125, an upper mold cutter fixing seat 126, an upper mold cutter 127, a first limiting rod 128, a second limiting rod 129, an upper mold first guiding structure 130, and an upper mold second guiding structure 131, wherein the upper mold cylinder 122 is disposed on the upper mold fixing plate 121, the plunger end of the plunger is connected with the upper die first plate 123, the upper die second plate 124 and the upper die third plate 125 are connected in sequence, the upper die cutter fixing seat 126 is arranged on the upper die third plate 125, the upper die cutter 127 is arranged on the upper die cutter fixing seat 126, the first limiting rod 128 and the second limiting rod 129 are arranged on the upper die cutter fixing seat 126 in parallel and positioned at two sides of the upper die cutter 127, the upper die first guide structure 130 and the upper die second guide structure 131 are disposed on the upper die fixing plate 121, and one end of the upper die first guide structure is connected to the upper die first plate 123.

A third heating rod 1251, a fourth heating rod 1252 and a second temperature sensor 1253 are arranged on the upper mold third plate 125, the third heating rod 1251 and the fourth heating rod 1252 are arranged in parallel in the third plate 125, and the second temperature sensor 1253 is arranged in the middle position in the third plate 125 and is located between the third heating rod 1251 and the fourth heating rod 1252; the upper die first guide structure 130 and the upper die second guide structure 131 have the same structure, the upper die first guide structure 130 includes a second guide pillar 1301 and a second guide sleeve 1302, one end of the second guide pillar 1301 is connected to the upper die first plate 123, and the other end is disposed in the second guide sleeve 1302 on the upper die fixing plate 121.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that modifications can be made by those skilled in the art without departing from the principle of the present invention, and these modifications should also be construed as the protection scope of the present invention.

Claims

1. The utility model provides a shape bending structure of preapring for an unfavorable turn of events for FPC board bending machine which characterized in that: the device comprises an upper die structure assembly (1) and a lower die structure assembly (2), wherein the lower die structure assembly (2) is arranged right below the upper die structure assembly (1); the lower die structure assembly (2) comprises a fixed seat (21) and a lower die structure (22), wherein a plurality of groups of the lower die structure (22) are arranged on the fixed seat (21) in parallel; the lower die structure (22) comprises a connecting seat (221), a lower die component (222) and a reinforcing component (223), the lower die component (222) is arranged on the connecting seat (221), and the reinforcing component (223) is arranged on the side edge of the connecting seat (221).

2. The deformation-preventing bending structure for the FPC board bending machine according to claim 1, characterized in that: the connecting seat (221) comprises a first connecting plate (2211), a first limiting strip (2212) and a second limiting strip (2213), and the first limiting strip (2212) and the second limiting strip (2213) are arranged on the first connecting plate (2211) in parallel; the first limiting strip (2212) and the second limiting strip (2213) are identical in structure, and guide strips (22121) are arranged on the side edges of the first limiting strip (2212).

3. The deformation-preventing bending structure for the FPC board bending machine according to claim 1, characterized in that: the lower die component (222) comprises a lower die cylinder (2221), a lower die first plate (2222), a lower die second plate (2223), a lower die third plate (2224), a lower die fourth plate (2225), a lower die cutter fixing seat (2226), a lower die cutter (2227), a lower die first guide structure (2228) and a lower die second guide structure (2229), the plunger end of the lower die cylinder (2221) is connected with the lower die first plate (2222), the lower die second plate (2223), the lower die third plate (2224) and the lower die fourth plate (2225) are sequentially connected, the lower die cutter fixing seat (2226) is arranged on the lower die fourth plate (2225), the lower die cutter (2227) is arranged on the lower die cutter fixing seat (2226), the first guide structures (2228) and the second guide structures (2229) of the lower die are arranged on the first connecting plate (2211) in parallel, and the end parts of the first guide structures and the second guide structures are connected with the first plate (2222) of the lower die.

4. The deformation-preventing bending structure for the FPC board bending machine according to claim 3, characterized in that: a first heating rod (22241), a second heating rod (22242) and a first temperature sensor (22243) are arranged on the third lower die plate (2224), the first heating rod (22241) and the second heating rod (22242) are arranged in parallel in the third lower die plate (2224), and the first temperature sensor (22243) is arranged in the middle of the third lower die plate (2224) and between the first heating rod (22241) and the second heating rod (22242); the first guide structure (2228) and the second guide structure (2229) of the lower die are identical in structure, the first guide structure (2228) of the lower die comprises a first guide pillar (22281) and a first guide sleeve (22282), one end of the first guide pillar (22281) is connected with the first plate (2222) of the lower die, and the other end of the first guide pillar is arranged in the first guide sleeve (22282) on the first connecting plate (2211).

5. The deformation-preventing bending structure for the FPC board bending machine according to claim 1, characterized in that: strengthen subassembly (223) including strengthening cylinder (2231), fixed plate (2232), second connecting plate (2233), first curb plate (2234), second curb plate (2235), strengthen cylinder (2231) and set up on fixed plate (2232), its plunger end and second connecting plate (2233) are connected, first curb plate (2234), second curb plate (2235) set up side by side in fixed plate (2232) both sides and its one end and second connecting plate (2233) are connected.

6. The deformation-preventing bending structure for the FPC board bending machine according to claim 5, wherein: the structure of the first side plate (2234) is the same as that of the second side plate (2235), a guide groove (22341) is arranged on the side edge of the first side plate (2234), and a chamfer (22342) is arranged at the end of the guide groove (22341).

7. The deformation-preventing bending structure for the FPC board bending machine according to claim 1, characterized in that: the upper die structure assembly (1) comprises an upper die fixing frame (11) and an upper die structure (12), wherein the upper die structure (12) is provided with a plurality of groups which are arranged on the upper die fixing frame (11) in parallel.

8. The deformation-preventing bending structure for the FPC board bending machine according to claim 7, characterized in that: the upper die structure (12) comprises an upper die fixing plate (121), an upper die cylinder (122), an upper die first plate (123), an upper die second plate (124), an upper die third plate (125), an upper die cutter fixing seat (126), an upper die cutter (127), a first limiting rod (128), a second limiting rod (129), an upper die first guide structure (130) and an upper die second guide structure (131), wherein the upper die cylinder (122) is arranged on the upper die fixing plate (121), the plunger end of the upper die cylinder is connected with the upper die first plate (123), the upper die second plate (124) and the upper die third plate (125) are sequentially connected, the upper die cutter fixing seat (126) is arranged on the upper die third plate (125), the upper die cutter (127) is arranged on the upper die cutter fixing seat (126), the first limiting rod (128) and the second limiting rod (129) are arranged on the upper die cutter fixing seat (126) in parallel and positioned on two sides of the upper die cutter (127), the upper die first guide structure (130) and the upper die second guide structure (131) are arranged on the upper die fixing plate (121), and one end of the upper die second guide structure is connected with the upper die first plate (123).

9. The deformation-bending preventing structure for the FPC board bending machine according to claim 8, characterized in that: a third heating rod (1251), a fourth heating rod (1252) and a second temperature sensor (1253) are arranged on the upper die third plate (125), the third heating rod (1251) and the fourth heating rod (1252) are arranged in the third plate (125) in parallel, and the second temperature sensor (1253) is arranged in the middle of the third plate (125) and is positioned between the third heating rod (1251) and the fourth heating rod (1252); the structure of the upper die first guide structure (130) is the same as that of the upper die second guide structure (131), the upper die first guide structure (130) comprises a second guide pillar (1301) and a second guide sleeve (1302), one end of the second guide pillar (1301) is connected with the upper die first plate (123), and the other end of the second guide pillar is arranged in the second guide sleeve (1302) on the upper die fixing plate (121).