Special film-coated aluminum sheet for drilling printed circuit board

Abstract

The utility model discloses a special coated aluminum sheet for drilling a printed circuit board, which comprises an aluminum sheet body, the middle area of the surface of the aluminum sheet body is connected with a coated layer through an adhesive layer, four edges of the surface of the aluminum sheet body are reserved to form four blank areas, each blank area is internally provided with a convex rib, and the convex rib is connected with the coated layer through an adhesive layer. Grooves corresponding to the ribs are formed in the back face of the aluminum sheet body, the four ribs are connected end to end, and a plurality of protruding points are arranged on each rib. The film coating layer is arranged in the middle of the aluminum sheet body, and the gaps are reserved on the periphery of the aluminum sheet body, so that the clamping jaws are not in contact with the film coating layer when being clamped on the outer side of the aluminum sheet body, the possibility of slipping is reduced, meanwhile, the convex edges are arranged to limit the clamping direction of the clamping jaws, and the possibility that the clamping jaws are separated outwards is reduced; the protruding points limit the clamping jaws in the extending direction of the protruding edges, the clamping jaws are prevented from sliding, the stability of the aluminum plate is integrally improved when the aluminum plate is overlapped with the circuit board and the base plate and limited by the clamping jaws, and therefore the drilling accuracy can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to printed circuit board processing auxiliary material technical field especially is special laminated aluminum sheet of printed circuit board drilling. BACKGROUND

[0002] Laminated aluminum sheet is a kind of material consisting of aluminum sheet and a layer of film covering on its surface, it plays an important role in circuit board drilling process, when laminated aluminum sheet is padded on circuit board drilling processing, it is easy to drill sharp accurate positioning, no deviation occurs, drill needle can more accurately penetrate circuit board, reduces hole position deviation, to improve the hole precision of drilling.

[0003] At present, when circuit board is finely drilled, laminated aluminum plate is usually padded on circuit board, and the pad is padded under circuit board to form three-layer structure, three-layer board is overlapped together and then is limited by clamping jaw at edge, to ensure that three-layer board is overlapped accurately, however, since film is covered on aluminum plate, clamping jaw is easy to slip when limiting, and when drilling, since drill bit rotates, three-layer board is slightly vibrated, further increase the possibility that clamping jaw is loose, to cause three-layer board to be misaligned, affect the accuracy of drilling.

[0004] Therefore, we propose special laminated aluminum sheet for printed circuit board drilling to solve the above problems. CONTENT OF UTILITY MODEL

[0005] The utility model aims at providing special laminated aluminum sheet for printed circuit board drilling to solve the problems proposed in the above background.

[0006] To achieve the above object, the utility model provides the following technical scheme:

[0007] Special laminated aluminum sheet for printed circuit board drilling, including aluminum sheet body, the surface middle area of aluminum sheet body is connected with film layer by adhesive layer, and four edges of the surface of aluminum sheet body are left blank to form four blank areas, each blank area is equipped with the protruding rib, and the back of aluminum sheet body corresponds to each rib and forms groove, four ribs are connected in a loop, and each rib is equipped with a plurality of convex points.

[0008] In further embodiment, the length direction of rib is parallel to the side length direction of aluminum sheet body.

[0009] In further embodiment, the length direction of convex point is perpendicular to the length direction of rib.

[0010] In further embodiment, the cross section of rib is arc structure.

[0011] In further embodiment, the surface of aluminum sheet body on the inner and outer sides of rib is flush.

[0012] In further embodiments, the aluminum sheet body surface on both sides of the groove is flush with each other.

[0013] Compared with the prior art, the utility model has the advantages of:

[0014] The utility model discloses a cover film layer is arranged in the middle part of the aluminum sheet body, and the four around of aluminum sheet body are left empty, so that when the claw is clamped on the outside of the aluminum sheet body, the cover film layer is not contacted, and then the possibility of skidding is reduced, and the convex rib is arranged to limit the direction of the claw, and the possibility of the claw outwardly coming off is reduced, and the convex point is arranged to limit the claw in the extension direction of the convex rib, prevents the claw from slipping, and the stability of the aluminum plate when being limited by the claw when being overlapped with the circuit board and the pad plate is improved as a whole, thereby the accuracy of drilling is improved. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is the structure schematic diagram of the utility model;

[0016] Figure 2 It is the utility model Figure 1 It is the structure schematic diagram of the utility model and the circuit board and the pad plate are overlapped and are limited by the claw;

[0017] Figure 3 It is the structure schematic diagram of the utility model and the circuit board and the pad plate are overlapped and are limited by the claw;

[0018] Figure 4 It is the structure schematic diagram of the utility model and the circuit board and the pad plate are overlapped and are limited by the claw;

[0019] Figure 5 It is the structure schematic diagram of the utility model and the circuit board and the pad plate are overlapped and are limited by the claw;

[0020] Figure 6 It is the structure schematic diagram of the utility model and the circuit board and the pad plate are overlapped and are limited by the claw;

[0021] In the drawing: 1, aluminum sheet body;11, blank area;12, convex rib;13, convex point;14, groove;2, adhesive layer;3, cover film layer;4, circuit board;5, pad plate;6, claw;61, protrusion;62, embedding groove. DETAILED DESCRIPTION

[0022] In the description of the utility model, it is necessary to understand that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as a limitation on the utility model. In the description of the utility model, the meaning of "a plurality of" is two or more, unless otherwise specified.

[0023] In the description of the utility model, it should be explained that, unless otherwise specified and limited, the terms "mounting", "connection" and "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the communication between two elements. For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0024] The technical scheme in the embodiments of the utility model will be clearly and completely described below in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary skilled persons in the art without creative labor belong to the scope of protection of the utility model.

[0025] Please refer to Figures 1-2 The special film-coated aluminum sheet for drilling printed circuit board comprises an aluminum sheet body 1, a film-coated layer 3 is connected to the middle area of the surface of the aluminum sheet body 1 through a glue layer 2, the glue layer 2 is a water-soluble adhesive, and the film-coated layer 3 is a water-soluble film, which can stabilize the drill bit in the instant of contact between the drill bit and the board surface, reduce the deviation of the drill bit, and form four blank areas 11 by leaving the four edges of the surface of the aluminum sheet body 1, each blank area 11 is provided with a protruding rib 12, and the back surface of the aluminum sheet body 1 is provided with a groove 14 corresponding to each rib 12, the rib 12 and the groove 14 are formed by stamping and pressing, the rib 12 is formed on one side surface of the aluminum sheet body 1, and the groove 14 is correspondingly formed on the other side surface of the aluminum sheet body 1, the four ribs 12 are connected end to end, and a plurality of protrusions 13 are arranged on each rib 12.

[0026] Specifically, please refer to Figures 3-6, the length direction of the convex ridge 12 is parallel to the side length direction of the aluminum sheet body 1, the length direction of the convex point 13 is perpendicular to the length direction of the convex ridge 12, in use, the aluminum sheet body 1 is placed on the circuit board 4, the circuit board 4 is placed on the cushion plate 5, the claw 6 is clamped on the outside of the three-layer plate formed by the aluminum sheet body 1, the circuit board 4 and the cushion plate 5, the convex 61 of the claw 6 is over the part of the convex ridge 12, and the embedding groove 62 can be buckled on the convex ridge 12, at this time, the convex ridge 12 limits the claw 6, preventing the claw 6 from being pulled out from the clamping direction, in addition, the distance between the adjacent convex points 13 is equal to the width of the claw 6, so that the claw 6 is clamped and limited by the adjacent convex points 13, thereby preventing the claw 6 from slipping along the direction of the convex ridge 12, the circuit board 4, the cushion plate 5, the claw 6, the convex 61 and the embedding groove 62

[0027] Further, the cross section of the convex ridge 12 is an arc structure, the convex 61 part of the claw 6 is also an arc structure, the claw 6 has a certain elasticity, when the claw 6 gradually approaches the three-layer plate, the convex 61 first contacts the outer arc surface of the convex ridge 12, under the guidance of the arc surface, the upper part of the claw 6 is squeezed and opened, so that the convex 61 part can successfully pass over the convex ridge 12.

[0028] The surfaces of the aluminum sheet body 1 on the inner and outer sides of the convex ridge 12 are flush with each other, and the surfaces of the aluminum sheet body 1 on the inner and outer sides of the concave groove 14 are flush with each other, so that the flatness of the contact surface is ensured when the aluminum sheet body 1, the circuit board 4 and the cushion plate 5 are stacked together.

[0029] It is apparent for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, but can be implemented in other concrete forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be considered in all aspects as illustrative and not restrictive, and the scope of the present application is defined by the appended claims rather than the above description, and all changes falling within the meaning and range of equivalents of the elements of the claims are intended to be embraced by the present application. Any reference signs in the claims should not be considered as limiting the claims involved.

[0030] In addition, it should be understood that, although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the specification is described in this way only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that those skilled in the art can understand.

Claims

1. A special film-coated aluminum sheet for printed circuit board drilling, comprising an aluminum sheet body (1), characterized in that: The surface middle area of the aluminum sheet body (1) is connected with a film layer (3) through a glue layer (2), four edges of the surface of the aluminum sheet body (1) are left blank to form four blank areas (11), each blank area (11) is provided with a protruding ridge (12), the back surface of the aluminum sheet body (1) is provided with a groove (14) corresponding to each ridge (12), the four ridges (12) are connected in a loop, and each ridge (12) is provided with a plurality of convex points (13).

2. The printed circuit board dedicated film-coated aluminum sheet for drilling according to claim 1, characterized by: The length direction of the ridge (12) is parallel to the side length direction of the aluminum sheet body (1).

3. The printed circuit board dedicated film-coated aluminum sheet for drilling according to claim 1, characterized by: The length direction of the convex point (13) is perpendicular to the length direction of the ridge (12).

4. The printed circuit board dedicated cover tape aluminum sheet of claim 1, wherein: The cross section of the ridge (12) is an arc structure.

5. The printed circuit board dedicated cover tape aluminum sheet of claim 1, wherein: The surfaces of the aluminum sheet body (1) on the inner and outer sides of the ridge (12) are flush with each other.

6. The printed circuit board dedicated cover tape aluminum sheet of claim 1, wherein: The surfaces of the aluminum sheet body (1) on the inner and outer sides of the groove (14) are flush with each other.

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