Mold structure capable of avoiding after-tack of double-faced adhesive tape

Abstract

According to the die structure capable of avoiding after-tack of the double-faced adhesive tape, the upper die base and the upper die plate are sequentially arranged from top to bottom, the containing cavity is formed below the upper die base, the movable cutting die assembly is elastically installed in the containing cavity, the cutting die assembly penetrates through the upper die plate, and the cutting die assembly comprises a connecting plate, a limiting mechanism and a movable cutter point module. The limiting mechanism and the movable cutter point are both installed below the connecting plate, a compression spring is installed between the connecting plate and the inner wall of the top of the containing cavity to form elastic installation, a first through hole and a second through hole are formed in the lower portion of the upper die plate, the first through hole corresponds to the movable cutter point module in position, and the second through hole corresponds to the limiting mechanism in position. A waste shoveling cutter point protruding outwards is arranged on the outer side of the first through hole, the movable cutter point module penetrates through the first through hole, and the waste shoveling cutter point is arranged on the outer side of the movable cutter point module. The mold structure capable of avoiding after-tack of the double-faced adhesive tape is simple in structure and capable of effectively preventing rapid after-tack of materials.

Description

Technical Field

[0001] The utility model relates to the technical field of stamping dies, in particular to a die structure capable of preventing double-sided adhesive from sticking back. Background Art

[0002] Die-cutting mainly involves die-cutting various shapes of single-sided and double-sided self-adhesive stickers, protective films, gaskets, dust screens, copper and aluminum foils, etc., which have been widely used in post-printing die-cutting of front and rear shells, windows, displays, microphones, receivers, keyboards, batteries, etc., as well as labels, etc. in electronic products such as mobile phones, laptops, PDAs, digital cameras, and stereos. For adhesive tapes, when die-cutting, it is often necessary to punch the adhesive but not the backing paper. After punching the product shape, the cut position and the waste material will easily cause the edge of the product to stick back, resulting in the problem of being unable to discharge waste, affecting the subsequent processing efficiency and quality of the product. Utility Model Content

[0003] The utility model aims to provide a mold structure which can avoid the back-adhesion of double-sided adhesive tape, so as to solve the technical problems in the background technology.

[0004] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions:

[0005] A mold structure that can prevent double-sided adhesive from sticking back, comprises an upper mold base and an upper mold plate from top to bottom, a accommodating cavity is provided below the upper mold base, a movable knife mold assembly is elastically installed in the accommodating cavity, the knife mold assembly passes through the upper mold plate, the knife mold assembly comprises a connecting plate, a limiting mechanism and a movable blade module, the limiting mechanism and the movable blade are both installed below the connecting plate, a compression spring is installed between the connecting plate and the top inner wall of the accommodating cavity to form an elastic installation, a first through hole and a second through hole are provided below the upper mold plate, the first through hole corresponds to the position of the movable blade module, the second through hole corresponds to the position of the limiting mechanism, an outwardly protruding scraping blade is provided on the outer side of the first through hole, the movable blade module passes through the first through hole, the scraping blade is on the outer side of the movable blade module, the longitudinal cross-section of the scraping blade is an inverted right-angled triangle structure, and the hypotenuse on the scraping blade is on the side away from the first through hole.

[0006] The limiting mechanism includes a first limiting block and a second limiting block, the first limiting block and the second limiting block have the same structure and are symmetrical on the left and right sides of the blade module, the first limiting block, the second limiting block and the movable blade module are all fixed below the connecting plate in the vertical direction and are parallel to each other, the bottom end surface of the first limiting block and the bottom end surface of the movable blade module are not in the same horizontal plane, and the bottom end surface of the first limiting block is below the bottom end surface of the movable blade module.

[0007] The first limiting block and the second limiting block are both rectangular structures.

[0008] Compared with the prior art, the present application discloses a mold structure that can avoid the back-adhesion of double-sided adhesive. The structure is simple. The movable blade module first contacts the material and die-cuts the product shape. The machine continues to press down. Since the movable blade limiting block mechanism contacts the lower mold, the product will not continue to cut deep. The scraping blade contacts the position of the waste material just cut. The inclination angle of the scraping blade is used to squeeze the waste material outward, thereby forming a gap between the waste material and the product, effectively preventing the material from quickly sticking back. The invention is suitable for double-sided pressure-sensitive adhesive and single-sided pressure-sensitive adhesive products, and can effectively ensure the subsequent normal processing of the product and the guarantee of processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 : A schematic diagram of the structure of this application;

[0010] Figure 2 : Structural diagram of the split die assembly and upper die plate;

[0011] Figure 3 : Schematic diagram of the use effect of this application. DETAILED DESCRIPTION

[0012] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0013] Specific embodiment 1: Please refer to Figure 1 and Figure 2 In the embodiment of the utility model, a mold structure that can avoid the back-adhesion of double-sided adhesive tape is provided, from top to bottom, an upper mold base 1 and an upper mold plate 2 are provided, a receiving cavity 101 is provided below the upper mold base 1, a movable knife mold assembly 3 is elastically installed in the receiving cavity 101, the knife mold assembly 3 passes through the upper mold plate 2, the knife mold assembly 3 includes a connecting plate 301, a limiting mechanism and a movable blade module 302, the limiting mechanism and the movable blade are both installed below the connecting plate 301, a compression spring 5 is installed between the connecting plate 301 and the top inner wall of the receiving cavity 101 to form an elastic installation, and the upper mold plate 2 is provided with a first through hole 201 and a second through hole 202 below. In this embodiment, two second through holes 202 are provided. The first through hole 201 corresponds to the position of the movable blade module 302, and the second through hole 202 corresponds to the position of the limiting mechanism. An outwardly protruding scraping blade 4 is provided on the outside of the first through hole 201. The movable blade module 302 passes through the first through hole 201. The scraping blade is on the outside of the movable blade module 302. The longitudinal section of the scraping blade is an inverted right triangle structure. The hypotenuse 401 on the scraping blade 4 is on the side away from the first through hole 201.

[0014] The limiting mechanism includes a first limiting block 303 and a second limiting block 304. In the present embodiment, the first limiting block 303 and the second limiting block 304 are both rectangular structures. The first limiting block 303 and the second limiting block 304 have the same structure and are symmetrical on the left and right sides of the blade module. The first limiting block 303, the second limiting block 304 and the movable blade module 302 are all fixed in the vertical direction below the connecting plate 301 and are parallel to each other. The bottom end face of the first limiting block 303 and the bottom end face of the movable blade module 302 are not in the same horizontal plane, and the bottom end face of the first limiting block 303 is below the bottom end face of the movable blade module 302.

[0015] Workflow: See Figure 3 , the material 6 is placed under the movable blade module 302. When the upper die seat is pressed down by an external power device, the blade position on the movable blade module first contacts the surface of the material 6 to punch the shape of the material 6. When the bottom end faces of the first limit block 303 and the second limit block 304 contact the end face of the lower die 7, it is the maximum value position of the punching depth. As the upper die 1 continues to press down, the connecting plate 301 will squeeze the compression spring 5 to allow the movable blade module 302 to move upward, and the waste scraping blade 4 will contact the material 6, and use its bevel 401 to squeeze the waste outward, thereby effectively avoiding the glue return phenomenon at the punching position.

[0016] Compared with the prior art, the present application discloses a mold structure that can avoid the back-adhesion of double-sided adhesive. The structure is simple. The movable blade module first contacts the material and die-cuts the product shape. The machine continues to press down. Since the movable blade limiting block mechanism contacts the lower mold, the product will not continue to cut deep. The scraping blade contacts the position of the waste material just cut. The inclination angle of the scraping blade is used to squeeze the waste material outward, thereby forming a gap between the waste material and the product, effectively preventing the material from quickly sticking back. The invention is suitable for double-sided pressure-sensitive adhesive and single-sided pressure-sensitive adhesive products, and can effectively ensure the subsequent normal processing of the product and the guarantee of processing efficiency.

[0017] It is obvious to those skilled in the art that the present invention is not limited to the details of the foregoing exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the foregoing description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0018] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A mold structure capable of preventing double-sided adhesive from sticking back, characterized in that: From top to bottom, there are the upper mold base and the upper mold plate, a accommodating cavity is provided below the upper mold base, a movable knife mold assembly is elastically installed in the accommodating cavity, the knife mold assembly passes through the upper mold plate, the knife mold assembly comprises a connecting plate, a limiting mechanism and a movable blade module, the limiting mechanism and the movable blade are both installed below the connecting plate, a compression spring is installed between the connecting plate and the top inner wall of the accommodating cavity to form an elastic installation, a first through hole and a second through hole are provided below the upper mold plate, the first through hole corresponds to the position of the movable blade module, the second through hole corresponds to the position of the limiting mechanism, an outwardly protruding scraping blade is provided on the outer side of the first through hole, the movable blade module passes through the first through hole, the scraping blade is on the outer side of the movable blade module, the longitudinal cross-section of the scraping blade is an inverted right-angled triangle structure, and the hypotenuse on the scraping blade is on the side away from the first through hole.

2. A mold structure capable of preventing double-sided adhesive from sticking back according to claim 1, characterized in that: The limiting mechanism includes a first limiting block and a second limiting block, the first limiting block and the second limiting block have the same structure and are symmetrical on the left and right sides of the blade module, the first limiting block, the second limiting block and the movable blade module are all fixed below the connecting plate in the vertical direction and are parallel to each other, the bottom end surface of the first limiting block and the bottom end surface of the movable blade module are not in the same horizontal plane, and the bottom end surface of the first limiting block is below the bottom end surface of the movable blade module.

3. A mold structure capable of preventing double-sided adhesive from sticking back according to claim 2, characterized in that: The first limiting block and the second limiting block are both rectangular structures.

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