Vacuum pressing air bag, device and equipment for flexible circuit board

Abstract

The utility model provides a vacuum pressing air bag, device and equipment for a flexible circuit board, and the surface, facing an air bag fixing plate, of the air bag is provided with a plurality of protruding points which are used for preventing the air bag from forming mirror surface fitting with the air bag fixing plate. Due to the fact that the face, facing the air bag, of the air bag fixing plate is a plane, the air bag and part of the air bag fixing plate can be attached in a mirror face mode to generate adsorption force, part of air is wrapped between the air bag fixing plate and the air bag and cannot come out, and the local swelling phenomenon is formed. In order to effectively avoid the bulging phenomenon caused by mirror surface fitting between the air bag and the air bag fixing plate, a plurality of salient points are arranged on the surface, facing the air bag fixing plate, of the air bag provided by the utility model, and the salient points can prevent the surface of the air bag from being fitted with the opposite surface of the air bag fixing plate.

Description

Technical Field

[0001] The utility model relates to the technical field of flexible circuit board pressing, in particular to a vacuum pressing airbag, a device and equipment for a flexible circuit board. Background Art

[0002] Flexible Printed Circuit (FPC), also known as soft circuit board or flexible circuit board, is a highly reliable and extremely flexible printed circuit made of polyimide or polyester film as the substrate. It is highly favored for its excellent properties such as light weight, thin thickness, and free bending and folding. During the production process of flexible circuit boards, a vacuum press is required to press the flexible circuit boards. The vacuum press is equipped with a vacuum pressing device for pressing the flexible circuit boards. The vacuum pressing device generally includes an upper template and a lower template. The upper template includes a substrate, an airbag fixing plate and an airbag. The airbag is fixed on the airbag fixing plate, and the airbag fixing plate is fixed on the substrate. After the upper and lower templates are closed, the airbag is inflated and pressed downward to achieve the pressing of the product. Since the surface of the airbag fixing plate facing the airbag is flat, when the upper and lower templates are closed, the airbag and part of the airbag fixing plate will fit in a mirror-like manner to generate adsorption force, causing part of the air to be wrapped between the airbag fixing plate and the airbag and unable to escape, forming a local bulging phenomenon. These local bulging positions formed at the moment the upper and lower templates are closed preferentially squeezed downward on the surface of the processed flexible circuit board, thereby causing bubbles or wrinkles.

[0003] Therefore, how to avoid bulging between the airbag and the airbag fixing plate has become a technical problem that needs to be solved urgently by those skilled in the art. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a vacuum pressed airbag for a flexible circuit board, wherein a plurality of protrusions are provided on the surface of the airbag facing the airbag fixing plate for avoiding mirror-surface bonding between the airbag and the airbag fixing plate.

[0005] Preferably, a plurality of the protrusions are arranged in an array.

[0006] Preferably, the airbag is fixed on the airbag fixing plate

[0007] Preferably, the airbag includes an integrally connected bladder body and an annular buckle arranged along the edge of the bladder body and facing the airbag fixing plate, and a plurality of the protrusions are arranged on the surface of the bladder body facing the airbag fixing plate; an annular groove is provided on the surface of the airbag fixing plate facing away from the bladder body, and the annular buckle is engaged with the annular groove.

[0008] Preferably, the annular buckle includes an integrally connected vertical edge, a horizontal edge and a snap-in short edge, the vertical edge is perpendicular to the bladder body, is arranged around the outer edge of the bladder body, and is located on the outside of the airbag fixing plate; the horizontal edge is perpendicular to the vertical edge, and covers the edge of the surface of the airbag fixing plate facing away from the bladder body; one end of the horizontal edge is connected to the vertical edge, and the other end is connected to the snap-in short edge; one end of the snap-in short edge is connected to the horizontal edge, and the other end is snapped into the annular slot, and the angle between the snap-in short edge and the horizontal edge is not greater than 90°.

[0009] The utility model also provides a vacuum pressing device for a flexible circuit board, comprising an upper template and a lower template, characterized in that the upper template comprises a substrate and an airbag fixing plate and an airbag as described above, a first recess is provided on the substrate, and the airbag fixing plate and the airbag are sequentially arranged in the first recess;

[0010] The lower template includes a lower hot plate, a jig pad, a fired iron plate and a sealing ring. A second recess is provided on the lower hot plate. The jig pad and the fired iron plate are sequentially arranged in the second recess. The sealing ring is embedded in the lower hot plate. When the upper template is buckled with the lower template, the sealing ring is sealed between the upper template and the lower template.

[0011] The utility model also provides a vacuum pressing device for a flexible circuit board, comprising the vacuum pressing device as described above.

[0012] Compared with the prior art, the technical solution of the embodiment of the utility model has the following beneficial effects:

[0013] Since the surface of the airbag fixing plate facing the airbag is a plane, the airbag and the airbag fixing plate will partially fit together in a mirror-like manner to generate adsorption force, causing some air to be trapped between the airbag fixing plate and the airbag and unable to escape, forming a local bulge. In order to effectively avoid the bulge caused by the mirror-like fit between the airbag and the airbag fixing plate, the utility model provides a vacuum pressed airbag of a flexible circuit board, and a plurality of convex points are provided on the surface of the airbag facing the airbag fixing plate, and these convex points can prevent the surface of the airbag from fitting with the opposite surface of the airbag fixing plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of a vacuum pressing device for a flexible circuit board provided by an embodiment of the utility model;

[0015] Figure 2 This is a disassembled diagram of an upper template provided by an embodiment of the utility model;

[0016] Figure 3 This is a disassembled diagram of a lower template provided by an embodiment of the utility model;

[0017] Figure 4 This is a cross-sectional view of the connection structure between an airbag and an airbag fixing plate provided by an embodiment of the utility model;

[0018] Figure 5 yes Figure 4 The enlarged view of point A in the middle;

[0019] Figure 6 It is a schematic diagram of the planar structure of an airbag provided by an embodiment of the utility model;

[0020] Figure 7 It is a three-dimensional diagram of an airbag provided by an embodiment of the utility model;

[0021] Description of reference numerals:

[0022] 1- Upper template;

[0023] 101-Substrate;

[0024] 102-airbag fixing plate;

[0025] 1021-annular slot;

[0026] 103-airbag;

[0027] 1031-capsule;

[0028] 1032-ring buckle;

[0029] 10321-vertical edge;

[0030] 10322- horizontal edge;

[0031] 10323-Snap into the short edge;

[0032] 1033-convex point;

[0033] 104-fixing member;

[0034] 2- Lower template;

[0035] 201- lower hot plate;

[0036] 2011-Second Recess;

[0037] 202-jig pad;

[0038] 203-burning iron plate;

[0039] 204-seal ring;

[0040] 3- Hinge. DETAILED DESCRIPTION

[0041] As described in the background art, how to avoid bulging between the airbag and the airbag fixing plate has become a technical problem that needs to be solved urgently by those skilled in the art.

[0042] In order to solve the above technical problems, the utility model provides a vacuum pressed airbag of a flexible circuit board. Since the surface of the airbag fixing plate facing the airbag is a plane, in order to effectively avoid the bulging phenomenon caused by the mirror bonding between the airbag and the airbag fixing plate, a plurality of convex points 1033 are provided on the surface of the airbag facing the airbag fixing plate in this embodiment. These convex points 1033 can prevent the surface of the airbag from bonding with the opposite surface of the airbag fixing plate. Please refer to Figure 6 and Figure 7 .

[0043] The utility model does not impose any specific limitation on the arrangement of the bumps, and the bumps may be arranged in an array, for example.

[0044] The utility model does not impose any specific restrictions on the height, width and density of the protrusions, which can be set according to actual use requirements.

[0045] In order to make the above-mentioned purposes, features and beneficial effects of the utility model more obvious and easy to understand, the technical scheme in the embodiment of the utility model will be clearly and completely described in combination with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0046] The terms "first", "second", "third", "fourth", etc. (if any) in the specification and claims of the present utility model and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the utility model described here can be implemented in an order other than those illustrated or described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices. The terms "on" and "above" and any of their variations are intended to describe positional relationships and do not represent a relationship of direct contact between the described objects.

[0047] Example 1

[0048] Please refer to Figures 1 to 7The present embodiment provides a vacuum pressing device for a flexible circuit board, including an upper template 1 and a lower template 2. The upper template 1 includes a substrate 101, an airbag fixing plate 102 and an airbag 103. A first recess is provided on the lower surface of the substrate 101. The airbag fixing plate 102 and the airbag 103 are sequentially arranged in the first recess from top to bottom.

[0049] The airbag fixing plate 102 is fixedly connected to the base plate 101 through a plurality of fixing members 104. The present embodiment does not limit the specific type of the fixing members 104, which can be set according to actual use requirements. The fixing members 104 can be fasteners, such as bolts, screws, etc.; they can also be snap fasteners; they can also be fixed blocks that play a role in fixing and connecting.

[0050] The airbag 103 is fixedly connected to the airbag fixing plate 102. The utility model does not limit the fixing method of the airbag 103 and the airbag fixing plate 102. For example, the airbag 103 can be fixed by a snap-on method. As an embodiment, the airbag 103 includes an integrally connected capsule body 1031 and an annular buckle 1032 arranged along the edge of the capsule body 1031 and facing the airbag fixing plate 102. In this embodiment, the capsule body 1031 is located below the airbag fixing plate 102, and the upper surface of the capsule body 1031 faces the airbag fixing plate 102. Therefore, a plurality of protrusions 1033 are provided on the upper surface of the capsule body 1031. These protrusions 1033 can prevent the upper surface of the capsule body 1031 from fitting with the airbag fixing plate 102, thereby effectively preventing the airbag 103 from forming a mirror fit with the lower surface of the airbag fixing plate 102 and causing a bulge. The surface of the airbag fixing plate 102 facing away from the airbag body 1031 is the upper surface of the airbag fixing plate 102. The upper surface of the airbag fixing plate 102 is provided with an annular groove 1021, and the annular groove 1021 is located at the edge of the upper surface of the airbag fixing plate 102. The airbag 103 and the airbag fixing plate 102 are fixedly connected by the annular buckle 1032 and the annular groove 1021. In this embodiment, the annular buckle 1032 will wrap the edge of the airbag fixing plate 102. Therefore, the airbag 103 is covered on the surface of the airbag fixing plate 102 by the annular buckle 1032, so that the airbag 103 will not fall off when inflated and pressurized.

[0051] As an embodiment, the annular buckle 1032 includes an integrally connected vertical edge 10321, a horizontal edge 10322, and a snap-in short edge 10323, wherein the vertical edge 10321 is perpendicular to the capsule body 1031 and faces the airbag fixing plate 102. The vertical edge 10321 is an annular structure, which is arranged around the outer edge of the capsule body 1031 and is located outside the airbag fixing plate 102. The horizontal edge 10322 is also an annular structure, which is perpendicular to the vertical edge 10321 and covers the upper surface edge of the airbag fixing plate 102. One end of the horizontal edge 10322 is connected to the vertical edge 10321, and the other end is connected to the snap-in short edge 10323. The snap-in short edge 10323 is also an annular structure, and the length of the snap-in short edge 10323 is less than the length of the vertical edge 10321. One end of the inserted short side 10323 is connected to the horizontal side 10322, and the other end is inserted into the annular slot 1021, and the angle between the inserted short side 10323 and the horizontal side 10322 is not greater than 90 degrees. In this embodiment, the vertical side 10321, the horizontal side 10322 and the inserted short side 10323 connected in one piece form a hook-shaped structure, which is adapted to be inserted into the annular slot 1021 on the upper surface of the airbag fixing plate 102.

[0052] The lower template 2 includes a lower hot plate 201, a jig pad 202, a fired iron plate 203 and a sealing ring 204. The upper surface of the lower hot plate 201 is provided with a second recess 2011. The jig pad 202 and the fired iron plate 203 are sequentially arranged in the second recess 2011 from bottom to top. The sealing ring 204 is an annular sealing ring, which is embedded in the upper surface of the lower hot plate 201 and surrounds the second recess 2011. When the upper template 1 is buckled with the lower template 2, the sealing ring 204 is sealed between the upper template 1 and the lower template 2.

[0053] The lower heating plate 201 is connected to the base plate 101 on the same side by a hinge 3. When the upper mold plate 1 is buckled with the lower mold plate 2, the air bag 103 and the sintering iron plate 203 form a cavity.

[0054] After the workpiece to be pressed is placed on the fired iron plate 203, the upper template 1 is buckled with the lower template 2, and the airbag 103 and the fired iron plate 203 form a cavity. By inflating the airbag 103, the airbag 103 presses the workpiece downward to achieve the purpose of pressing. At the moment when the upper template 1 and the lower template 2 are closed, since the upper surface of the bladder body 1031 of the airbag 103 is provided with a plurality of convex points 1033, it can effectively avoid the upper surface of the bladder body 1031 and the lower surface of the airbag fixing plate 102 from forming a mirror fit to cause bulging.

[0055] Example 2

[0056] This embodiment provides a vacuum pressing device for a flexible circuit board, and the device includes the vacuum pressing device described in the above-mentioned embodiment 1.

[0057] Although the utility model is disclosed as above, the utility model is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the utility model. Therefore, the protection scope of the utility model shall be subject to the scope defined by the claims.

Claims

1. A vacuum pressing airbag for a flexible circuit board, characterized in that: A plurality of convex points are arranged on the surface of the airbag facing the airbag fixing plate to prevent the airbag from forming a mirror-surface fit with the airbag fixing plate.

2. The vacuum pressed airbag according to claim 1, characterized in that: A plurality of the protrusions are arranged in an array.

3. The vacuum pressed airbag according to claim 1, characterized in that: The airbag is fixed on the airbag fixing plate.

4. The vacuum pressing airbag according to claim 3, characterized in that: The airbag includes an integrally connected bladder body and an annular buckle arranged along the edge of the bladder body and facing the airbag fixing plate, and a plurality of protrusions are arranged on the surface of the bladder body facing the airbag fixing plate; an annular groove is provided on the surface of the airbag fixing plate facing away from the bladder body, and the annular buckle is engaged with the annular groove.

5. The vacuum pressing airbag according to claim 4, characterized in that: The annular buckle includes an integrally connected vertical edge, a horizontal edge and a snap-in short edge, the vertical edge is perpendicular to the bladder body, surrounds the outer edge of the bladder body, and is located on the outside of the airbag fixing plate; the horizontal edge is perpendicular to the vertical edge, and covers the edge of the surface of the airbag fixing plate facing away from the bladder body; one end of the horizontal edge is connected to the vertical edge, and the other end is connected to the snap-in short edge; one end of the snap-in short edge is connected to the horizontal edge, and the other end is snapped into the annular slot, and the angle between the snap-in short edge and the horizontal edge is not greater than 90°.

6. A vacuum pressing device for a flexible circuit board, comprising an upper mold plate and a lower mold plate, characterized in that: The upper mold plate comprises a base plate and an airbag fixing plate and an airbag as claimed in any one of claims 1 to 5, wherein a first recess is provided on the base plate, and the airbag fixing plate and the airbag are sequentially arranged in the first recess; The lower template includes a lower hot plate, a jig pad, a fired iron plate and a sealing ring. A second recess is provided on the lower hot plate. The jig pad and the fired iron plate are sequentially arranged in the second recess. The sealing ring is embedded in the lower hot plate. When the upper template is buckled with the lower template, the sealing ring is sealed between the upper template and the lower template.

7. A vacuum pressing device for a flexible circuit board, characterized in that: It comprises the vacuum pressing device as claimed in claim 6.

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