CN219132581U

CN219132581U - Die-cut mould of flexible circuit board appearance

Info

Publication number: CN219132581U
Application number: CN202223474284.7U
Authority: CN
Inventors: 王家宏
Original assignee: Yangzhou Huameng Electronics Co ltd
Current assignee: Yangzhou Huameng Electronics Co ltd
Priority date: 2022-12-26
Filing date: 2022-12-26
Publication date: 2023-06-06
Anticipated expiration: 2032-12-26

Abstract

The utility model discloses a flexible circuit board appearance punching die which comprises a die base, wherein knife edges which are matched with the appearance of a flexible circuit board are distributed on the die base, a plurality of elastic positioning pins are further arranged on the die base, and positioning holes which are matched with the elastic positioning pins are formed in the manufacturing surface of the flexible circuit board. According to the utility model, on one hand, through the design of the elastic positioning needle, the alignment of the flexible circuit board and the knife edge on the punching die in the punching process is ensured, and the processing precision is effectively ensured; on the other hand, through the structural design of the knife edge, the reliable separation of the key positions of the flexible circuit board is ensured, and meanwhile, the service life of the knife edge is effectively prolonged, and the flexible circuit board has the characteristics of simple structure, high separation efficiency, stability, reliability and the like.

Description

Die-cut mould of flexible circuit board appearance

Technical Field

The utility model relates to a flexible circuit board appearance punching die, and belongs to the technical field of circuit board design and manufacture.

Background

A Flexible Printed Circuit (FPC) is a highly reliable, extremely flexible printed circuit board made of polyimide or polyester film as a base material, and has the characteristics of high wiring density, light weight, thin thickness, and good flexibility. The insulating film forms a base layer of the circuit and the adhesive adheres the copper foil to the insulating layer. They are also used as protective covers to insulate the circuit from dust and moisture and to reduce stress during flexing, the copper foil forming a conductive layer.

The FPC after processing is not separated from the manufacturing surface, and the final product can be obtained through shearing and punching treatment. After shearing, most of the contour of the FPC has been cut, but the critical locations are still connected, requiring separation by die cutting. The reason why the FPC cannot be cut at one time is that the main material of the FPC is metallic copper, and in order to prevent warpage, sharp edges and burrs, the product is cut by punching twice.

In order to realize the appearance punching of the flexible circuit board, a flexible circuit board appearance punching die which is simple in structure, high in separation efficiency, stable and reliable needs to be designed, and the reliable separation of key positions of the flexible circuit board can be realized while the alignment precision of the flexible circuit board and the punching die is ensured.

Disclosure of Invention

The utility model aims to: aiming at the problems existing in the prior art, the utility model provides the flexible circuit board appearance punching die which can realize reliable separation of key positions of the flexible circuit board while ensuring alignment precision of the flexible circuit board and the punching die, and has the characteristics of simple structure, high separation efficiency, stability, reliability and the like.

The technical scheme is as follows: in order to achieve the above purpose, the utility model provides a flexible circuit board appearance punching die which comprises a die base, wherein knife edges matched with the appearance of a flexible circuit board are distributed on the die base, a plurality of elastic positioning pins are further arranged on the die base, positioning holes matched with the elastic positioning pins are formed in the manufacturing surface of the flexible circuit board, and the alignment of the flexible circuit board and the knife edges on the punching die is ensured through the cooperation of the positioning holes and the elastic positioning pins, so that the processing precision is effectively ensured.

Further, the knife edge is in a cone structure with gradually contracted top, and comprises a straight surface on one side and an inclined surface on one side, wherein the straight surface is used for guaranteeing the sharpness of the knife edge, and the inclined surface is used for improving the stability of the knife edge structure, so that the service life of the knife edge is prolonged.

Further, the elastic positioning pins are distributed at the four top angles and the center of the die base, so that punching accuracy of the flexible circuit board is guaranteed.

Further, the elastic positioning needle comprises a shell and a reset spring, the elastic positioning needle can be retracted in the stamping process, the lowest height of the elastic positioning needle can be lower than the height of the knife edge, and the punching effect is prevented from being influenced.

Furthermore, the two sides of the die base are provided with height limiting blocks, the height of each height limiting block is 0.1mm higher than that of the knife edge, and the height limiting blocks are used for limiting the maximum impact depth of the punch and avoiding the die from being damaged by the impact.

Further, the flexible circuit board and the manufacturing surface thereof are covered with micro-adhesive films. Because of the micro-mucosa, the cut product can be stuck by the micro-mucosa, so that the product is separated, and the product is not required to be contacted by hands to prevent oxidation.

The beneficial effects are that: compared with the prior art, the flexible circuit board appearance punching die provided by the utility model has the following advantages:

1. through the design of the elastic positioning needle, the alignment of the flexible circuit board and the knife edge on the punching die in the punching process is ensured, and the processing precision is effectively ensured;

2. through the structural design of the knife edge, the reliable separation of the key positions of the flexible circuit board is ensured, and meanwhile, the service life of the knife edge is effectively prolonged, and the flexible circuit board has the characteristics of simple structure, high separation efficiency, stability, reliability and the like.

Drawings

FIG. 1 is a schematic view of a punching die according to an embodiment of the present utility model;

FIG. 2 is a schematic diagram showing the cooperation of the FPC and the punching die in an embodiment of the present utility model;

FIG. 3 is a schematic view of an elastic positioning needle according to an embodiment of the present utility model;

the drawings include: 1. the die comprises a die base, 2, a knife edge, 3, an elastic positioning needle, 4, a height limiting block, 5, an FPC (flexible printed circuit), 6, a manufacturing surface, 11, a mounting hole, 31, a shell, 32, a return spring, 33 and a cover plate.

Detailed Description

The following description of the preferred embodiments of the present utility model will be made with reference to the accompanying drawings, to more clearly and completely illustrate the technical aspects of the present utility model.

Fig. 1 shows a die-cut die for die-cutting the profile of a flexible circuit board according to this embodiment, which is used for die-cutting the profile of a power switching flexible circuit board of an ultra-thin computer, wherein the die-cut positions are at the corners of two sides, and the rest positions are already cut before die-cutting. As shown in fig. 2, 4 FPC products are distributed on each row on the manufacturing surface, and each product is punched through two symmetrical

U-shaped knife edges

2, and 6 rows are punched each time.

As shown in fig. 1, the punching die comprises a die base 1, knife edges 2 adapting to the shape of the FPC5 are distributed on the die base 1, 6 elastic positioning pins 3 are further arranged on the die base 1, positioning holes adapting to the elastic positioning pins 3 are formed in a manufacturing surface 6 of the FPC5, and the alignment of the FPC5 and the knife edges 2 on the punching die is ensured through the cooperation of the positioning holes and the elastic positioning pins 3, so that the processing precision is effectively ensured.

In this embodiment, each U-shaped blade 2 is a cone structure with gradually shrinking top, and includes an inner straight surface and an outer inclined surface (inner straight and outer inclined structures), where the straight surface is used to ensure sharpness of the blade, and the inclined surface is used to improve stability of the blade structure, so as to facilitate improving service life of the blade.

Further, 6 elastic positioning pins 3 are distributed at four vertex angles and the center of the die base 1, so that punching accuracy of the flexible circuit board is guaranteed.

As shown in fig. 3, the elastic positioning needle 3 includes a housing 31 and a return spring 32, a mounting hole 11 is formed in the mold base 1, the bottom of the housing 31 is connected in the mounting hole 11 through the return spring 32, a cover plate 33 is arranged on the mold base 1, a boss is arranged on the side wall of the housing 31, and limiting of the housing 31 is realized through cooperation of the boss and the cover plate 33. The elastic positioning needle can be retracted in the stamping process, and the lowest height of the elastic positioning needle can be lower than the height of the knife edge, so that the punching effect is prevented from being influenced.

Furthermore, the two sides of the die base 1 are provided with the height limiting blocks 4, and the height of the height limiting blocks 4 is 0.1mm higher than that of the knife edge 2, so as to limit the maximum impact depth of the punch and avoid the damage to the die due to the too deep impact.

Further, the FPC5 and its production surface 6 are coated with a micro-adhesive film. Because of the micro-mucosa, the cut product can be stuck by the micro-mucosa, so that the product is separated, and the product is not required to be contacted by hands to prevent oxidation.

Before punching, the manufacturing surface 6 with the micro-adhesive film is horizontally placed on the die base 1, so that the elastic positioning needle 3 penetrates through the positioning hole, and positioning of the FPC on the punching die is completed. When punching, the punch is used for driving the upper die (the punching surface is a plane) to punch, under the action of the height limiting block, the maximum impact depth of the upper die is 0.1mm higher than that of the knife edge, under the pressure action of the upper die, the knife edge 2 can cut the key position of the FPC, and as the rest positions are cut before punching, the FPC is completely cut (the micro-mucosa thickness is thinner and can not be cut).

After the FPC product on the whole manufacturing surface is punched, tearing off waste materials except the product, and leaving all finished products on a micro-adhesive film to be delivered after quality inspection.

The above detailed description is merely illustrative of the preferred embodiments of the present utility model and is not intended to limit the scope of the present utility model. Various modifications, substitutions and improvements of the technical scheme of the present utility model will be apparent to those skilled in the art from the description and drawings provided herein without departing from the spirit and scope of the utility model.

Claims

1. The utility model provides a die-cut mould of flexible circuit board appearance, its characterized in that includes the mould base, the last edge of a knife that suits with flexible circuit board appearance that distributes of mould base still is equipped with a plurality of elasticity locating needle on the mould base, and be equipped with the locating hole with elasticity locating needle looks adaptation on the preparation face of flexible circuit board.

2. The flexible circuit board outline blanking die of claim 1, wherein the knife edge is in a cone structure with gradually shrinking top, and comprises a straight side surface and a bevel side surface.

3. The flexible circuit board outline blanking die of claim 1, wherein the elastic positioning pins are distributed at four corners and the center of the die base.

4. The flexible circuit board outline blanking die of claim 1, wherein said elastic positioning pin includes a housing and a return spring.

5. The flexible circuit board profile punching die according to claim 1, wherein the two sides of the die base are provided with height limiting blocks, and the height of the height limiting blocks is 0.1mm higher than that of the knife edge.

6. The flexible circuit board outline blanking die of claim 1, wherein the flexible circuit board and its fabrication face are coated with a micro-adhesive film.