A die-cutting device for miniaturized foam products

Abstract

The present invention relates to a die-cutting device for miniaturized foam products, wherein the foam product comprises a release film layer, a double-sided adhesive layer and a foam layer which are sequentially attached together from bottom to top, wherein the length of the foam layer is greater than the length of the double-sided adhesive layer, and the die-cutting device comprises a composite material belt feeding unit, a double-sided adhesive die-cutting unit, a double-sided adhesive waste discharge unit, a foam feeding unit, a foam die-cutting unit and a foam waste discharge unit which are sequentially arranged along the moving direction of the material belt. Compared with the prior art, the present invention firstly uses a double-sided adhesive die-cutting knife to die-cut a whole adhesive area on the double-sided adhesive layer to avoid the problems of displacement and adhesive overflow of the double-sided adhesive, and then uses a foam die-cutting knife to die-cut the outer contour of the foam product on the foam layer, and simultaneously cuts the product adhesive area and the double-sided adhesive waste area in the whole adhesive area, which not only simplifies the processing steps, but also realizes the smooth die-cutting processing of the foam product, and avoids the problems of adhesive overflow, difficulty in waste discharge, product falling, etc., thereby ensuring the product quality.

Description

Technical Field

[0001] The invention belongs to the technical field of foam product processing and relates to a die-cutting device for miniaturized foam products. Background Art

[0002] In the past, the processing of foam products often adopts a one-step forming punching process. Using a die-cutting machine to perform a single punching, foam products can be quickly and accurately die-cut on the material strip. This one-step forming punching foam process has the advantages of high output and no offset between foam and glue.

[0003] With the continuous development of science and technology, electronic products are becoming thinner and smaller, and the corresponding die-cut products used for electronic products are also becoming smaller and smaller, and the technical requirements for the die-cutting industry are becoming higher and higher. At present, more and more miniaturized foam products are being processed using the traditional one-step punching process. Problems such as overflowing glue, difficulty in waste discharge, and more product falling off have caused many problems in subsequent processing and application, and led to direct economic losses. Summary of the invention

[0004] The purpose of the present invention is to provide a die-cutting device for miniaturized foam products in order to overcome the defects of the prior art.

[0005] The purpose of the present invention can be achieved by the following technical solutions:

[0006] A die-cutting device for miniaturized foam products, wherein the foam product comprises a release film layer, a double-sided adhesive layer and a foam layer which are sequentially bonded together from bottom to top, wherein the length of the foam layer is greater than that of the double-sided adhesive layer, and the die-cutting device comprises a composite material belt feeding unit, a double-sided adhesive die-cutting unit, a double-sided adhesive waste discharge unit, a foam feeding unit, a foam die-cutting unit and a foam waste discharge unit which are sequentially arranged along the moving direction of the material belt.

[0007] As a preferred technical solution, in the foam product, the length of the foam layer is 4.5-5.5 mm, preferably 5.10 mm; the width is 2-2.5 mm, preferably 2.26 mm; and the thickness is 1.5-1.6 mm, preferably 1.55 mm.

[0008] Furthermore, a protective film is provided at the bottom of the release film layer, which is convenient for protecting the material strip during die-cutting.

[0009] Furthermore, both ends of the foam layer are provided with foam adhesive-free areas, which correspond to the indented parts at both ends of the double-sided adhesive layer, and there is no double-sided adhesive in the foam adhesive-free areas.

[0010] As a preferred technical solution, the width of the foam adhesive-free area (ie, the distance between the end of the double-sided adhesive layer and the end of the foam layer) is 0.04-0.06 mm, preferably 0.05 mm.

[0011] Furthermore, the composite tape feeding unit includes a composite tape feeding roller and a composite tape wound on the composite tape feeding roller, wherein the composite tape includes a protective film, a release film layer, a double-sided adhesive layer and an auxiliary release film sequentially attached together from bottom to top. The composite tape feeding roller sequentially delivers the composite tape to other units.

[0012] Furthermore, the double-sided adhesive die-cutting unit comprises a first upper die seat, a first lower die seat arranged below the first upper die seat, and a double-sided adhesive die-cutting knife arranged on the lower surface of the first upper die seat. The double-sided adhesive die-cutting knife cuts through the auxiliary release film and the double-sided adhesive layer at the same time to die-cut the double-sided adhesive layer.

[0013] Furthermore, the double-sided adhesive die-cutting knife is in the shape of a hollow rectangle, and a plurality of product adhesive areas and a plurality of double-sided adhesive waste areas are arranged alternately in sequence inside the hollow rectangle along the length direction of the hollow rectangle. The double-sided adhesive die-cutting knife die-cuts a whole adhesive area on the double-sided adhesive layer. In the whole adhesive area, the double-sided adhesive part of the product adhesive area is the double-sided adhesive layer in the final foam product. The length of the product adhesive area is less than the length of the foam layer, so it is first die-cut separately; the width of the product adhesive area is the same as that of the foam layer, and can be die-cut together with the outer contour of the foam in the subsequent foam die-cutting unit. The double-sided adhesive part of the double-sided adhesive waste area is die-cut together with the foam outer frame waste in the subsequent foam die-cutting unit and the foam waste discharge unit and then discharged.

[0014] Furthermore, the double-sided adhesive waste discharge unit includes a double-sided adhesive waste discharge roller arranged above the material belt and a double-sided adhesive waste discharge roller driving motor connected to the double-sided adhesive waste discharge roller, the foam waste discharge unit includes a foam waste discharge roller arranged above the material belt and a foam waste discharge roller driving motor connected to the foam waste discharge roller, and the foam feeding unit includes a foam feeding roller arranged above the material belt. The waste discharge roller driving motor drives the corresponding waste discharge roller to rotate to achieve waste discharge. The foam layer delivered by the foam feeding roller is attached to the double-sided adhesive layer on the material belt after the waste outside the entire adhesive area is discharged.

[0015] Furthermore, the foam die-cutting unit comprises a second upper die seat, a second lower die seat arranged below the second upper die seat, and a foam die-cutting knife arranged on the lower surface of the second upper die seat. The foam die-cutting knife cuts through the foam layer and the double-sided adhesive layer at the same time.

[0016] Furthermore, the foam die-cutting knife comprises a plurality of foam outer contour die-cutting edges sequentially arranged on the lower surface of the second upper die seat along the length direction of the second upper die seat. The foam outer contour die-cutting edges die-cut the outer contour of the foam product on the foam layer, and at the same time cut the product adhesive area and the double-sided adhesive waste area in the remaining whole adhesive area on the double-sided adhesive layer, and then discharge the double-sided adhesive waste area and the foam outer contour waste at the same time.

[0017] Furthermore, the foam die cutting knife also includes a waste discharge cutting edge arranged on the lower surface of the second upper die seat and connected to the foam outer contour die cutting cutting edge. The waste discharge cutting edge cuts a waste discharge line on the foam layer to facilitate overall waste discharge.

[0018] In the present invention, the length of the double-sided adhesive layer is appropriately reduced so that a certain distance is left between the two ends of the double-sided adhesive layer and the two ends of the foam layer, which will not have an adverse effect on the application of the entire foam product, and can also avoid problems such as adhesion, waste discharge difficulty, and product falling caused by a small amount of overflow of the double-sided adhesive layer. During die-cutting processing, the composite tape fed by the composite tape feeding unit is die-cut in the double-sided adhesive die-cutting unit, and the double-sided adhesive layer is processed. After the double-sided adhesive layer is discharged, the foam layer is attached to the double-sided adhesive layer on the tape through the foam feeding unit, and the foam layer is processed through the foam die-cutting unit. Finally, the excess waste is discharged in the foam waste discharge unit.

[0019] Compared with the prior art, the present invention has the following characteristics:

[0020] 1) Without changing the shape of the foam layer and the width of the double-sided adhesive layer, only the two ends of the double-sided adhesive layer are indented to form a foam glue-free area, which will not have an adverse effect on the application of the entire foam product, and can avoid problems such as adhesion, waste discharge difficulties, and product falling caused by a small amount of overflow of the double-sided adhesive layer;

[0021] 2) First, use a double-sided adhesive die-cutting knife to die-cut the entire adhesive area on the double-sided adhesive layer to avoid problems such as displacement and overflow of the double-sided adhesive. Then, use a foam die-cutting knife to die-cut the outer contour of the foam product on the foam layer, and at the same time cut the product adhesive area and the double-sided adhesive waste area in the entire adhesive area. This not only simplifies the processing steps, but also realizes the smooth die-cutting processing of the foam product, avoids overflow, waste discharge difficulties, product falling and other problems, and ensures product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the cross-sectional structure of the foam product of the present invention;

[0023] Figure 2 It is a schematic structural diagram of the foam adhesive-free area in the present invention;

[0024] Figure 3 It is a schematic diagram of the overall structure of the die-cutting device in the present invention;

[0025] Figure 4 It is a schematic diagram of the cross-sectional structure of the composite material strip in the present invention;

[0026] Figure 5 It is a bottom view structural schematic diagram of the double-sided adhesive die cutter in the present invention;

[0027] Figure 6 It is a bottom view structural schematic diagram of the foam die cutting knife in the present invention;

[0028] Description of the markings in the figure:

[0029] 1—release film layer, 2—double-sided adhesive layer, 3—foam layer, 4—protective film, 5—foam non-adhesive area, 6—composite tape feeding roller, 7—composite tape, 8—auxiliary release film, 9—first upper die seat, 10—first lower die seat, 11—double-sided adhesive die-cutting knife, 12—product adhesive area, 13—double-sided adhesive waste area, 14—double-sided adhesive waste discharge roller, 15—foam waste discharge roller, 16—foam feeding roller, 17—second upper die seat, 18—second lower die seat, 19—foam die-cutting knife, 20—foam outer contour die-cutting edge, 21—waste discharge edge. DETAILED DESCRIPTION

[0030] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0031] Example:

[0032] like Figure 1 The foam product shown includes a release film layer 1, a double-sided adhesive layer 2 and a foam layer 3 which are sequentially attached from bottom to top. The length of the foam layer 3 is greater than the length of the double-sided adhesive layer 2. A protective film 4 is also provided at the bottom of the release film layer 1. Figure 2 As shown, both ends of the foam layer 3 are provided with foam glue-free areas 5 .

[0033] like Figure 3 The die-cutting device shown is used for miniaturized foam products, including a composite material strip feeding unit, a double-sided adhesive die-cutting unit, a double-sided adhesive waste discharge unit, a foam feeding unit, a foam die-cutting unit and a foam waste discharge unit which are sequentially arranged along the moving direction of the material strip.

[0034] The composite tape feeding unit comprises a composite tape feeding roller 6 and a composite tape 7 wound around the composite tape feeding roller 6. Figure 4 As shown, the composite material strip 7 includes a protective film 4, a release film layer 1, a double-sided adhesive layer 2 and an auxiliary release film 8 which are sequentially bonded together from bottom to top.

[0035] The double-sided adhesive die-cutting unit comprises a first upper die holder 9, a first lower die holder 10 arranged below the first upper die holder 9, and a double-sided adhesive die-cutting knife 11 arranged on the lower surface of the first upper die holder 9. Figure 5 As shown, the double-sided adhesive die cutter 11 is in the shape of a hollow rectangle, and a plurality of product adhesive areas 12 and a plurality of double-sided adhesive waste areas 13 are alternately arranged in sequence inside the hollow rectangle along the length direction of the hollow rectangle.

[0036] The double-sided tape waste discharge unit includes a double-sided tape waste discharge roller 14 arranged above the material belt and a double-sided tape waste discharge roller driving motor which is transmission-connected to the double-sided tape waste discharge roller 14; the foam waste discharge unit includes a foam waste discharge roller 15 arranged above the material belt and a foam waste discharge roller driving motor which is transmission-connected to the foam waste discharge roller 15; and the foam feeding unit includes a foam feeding roller 16 arranged above the material belt.

[0037] The foam die-cutting unit includes a second upper die base 17, a second lower die base 18 disposed below the second upper die base 17, and a foam die-cutting knife 19 disposed on the lower surface of the second upper die base 17. Figure 6 As shown, the foam die cutting knife 19 includes a plurality of foam outer contour die cutting edges 20 sequentially arranged on the lower surface of the second upper die base 17 along the length direction of the second upper die base 17. The foam die cutting knife 19 also includes a waste discharge edge 21 arranged on the lower surface of the second upper die base 17 and connected to the foam outer contour die cutting edge 20.

[0038] By appropriately reducing the length of the double-sided adhesive layer 2, a certain distance is left between the two ends of the double-sided adhesive layer 2 and the two ends of the foam layer 3, which will not have an adverse effect on the application of the entire foam product, and can also avoid the problems of adhesion, waste discharge difficulty, product falling caused by a small amount of overflow of the double-sided adhesive layer 2. During the die-cutting process, the composite tape 7 sent by the composite tape feeding unit is die-cut in the double-sided adhesive die-cutting unit to process the double-sided adhesive layer 2; then the double-sided adhesive layer 2 is discharged, and the foam layer 3 is attached to the double-sided adhesive layer 2 on the tape through the foam feeding unit; the foam layer 3 is processed by the foam die-cutting unit, and finally the excess waste is discharged in the foam waste discharge unit.

[0039] The above description of the embodiments is to facilitate the understanding and use of the invention by those skilled in the art. It is obvious that those skilled in the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative work. Therefore, the present invention is not limited to the above embodiments, and improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the present invention should be within the scope of protection of the present invention.

Claims

1. A die-cutting device for miniaturized foam products, the foam product comprising a release film layer (1), a double-sided adhesive layer (2) and a foam layer (3) sequentially bonded together from bottom to top, the length of the foam layer (3) being greater than the length of the double-sided adhesive layer (2), characterized in that: The die-cutting device comprises a composite tape feeding unit, a double-sided tape die-cutting unit, a double-sided tape waste discharge unit, a foam feeding unit, a foam die-cutting unit and a foam waste discharge unit which are sequentially arranged along the moving direction of the tape; Both ends of the foam layer (3) are provided with foam glue-free areas (5); The double-sided adhesive die-cutting unit comprises a first upper die seat (9), a first lower die seat (10) arranged below the first upper die seat (9), and a double-sided adhesive die-cutting knife (11) arranged on the lower surface of the first upper die seat (9); the double-sided adhesive die-cutting knife (11) is in the form of a hollow rectangle, and a plurality of product adhesive areas (12) and a plurality of double-sided adhesive waste areas (13) are arranged alternately in sequence inside the hollow rectangle along the length direction of the hollow rectangle; The foam die-cutting unit comprises a second upper die base (17), a second lower die base (18) arranged below the second upper die base (17), and a foam die-cutting knife (19) arranged on the lower surface of the second upper die base (17); the foam die-cutting knife (19) comprises a plurality of foam outer contour die-cutting edges (20) arranged in sequence on the lower surface of the second upper die base (17) along the length direction of the second upper die base (17); the foam die-cutting knife (19) further comprises a waste discharge edge (21) arranged on the lower surface of the second upper die base (17) and connected to the foam outer contour die-cutting edge (20); A protective film (4) is also provided at the bottom of the release film layer (1); The composite material tape feeding unit comprises a composite material tape feeding roller (6) and a composite material tape (7) wound on the composite material tape feeding roller (6), wherein the composite material tape (7) comprises a protective film (4), a release film layer (1), a double-sided adhesive layer (2) and an auxiliary release film (8) which are sequentially bonded together from bottom to top; The double-sided adhesive waste discharge unit comprises a double-sided adhesive waste discharge roller (14) arranged above the material belt and a double-sided adhesive waste discharge roller driving motor which is transmission-connected to the double-sided adhesive waste discharge roller (14); the foam waste discharge unit comprises a foam waste discharge roller (15) arranged above the material belt and a foam waste discharge roller driving motor which is transmission-connected to the foam waste discharge roller (15); and the foam feeding unit comprises a foam feeding roller (16) arranged above the material belt.

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