CN115805625A - A Die-cutting Process for Thick Foam without Knife Marks - Google Patents

Abstract

The invention provides a die-cutting process for thick foam without knife marks, which comprises the following steps: S1. The thick foam after peeling off the backing paper is sent into the gap machine in a step-by-step manner, and the double-layered double-layer film bonded together by the isolation film and the bottom film The surface glue is also sent into the gap machine in a step-by-step manner, and the knife mold of the gap machine performs die-cutting in the time period when the thick foam and double-sided adhesive both stop stepping; S2, mold the edges of both sides of the thick foam Cutting side knife line, die-cutting the waste discharge longitudinal knife line on both sides of the isolation film for waste discharge; the invention adopts the die-cutting process, after die-cutting, that is, when the closed shape of the product is not formed, it is intended to release the mold The film is discharged, but because the closed shape of the product is not formed, the product area will not be taken away due to the discharge of the release film, which fundamentally prevents the phenomenon of film falling off. The invention does not need to replace the bottom film during the process, which is convenient Waste discharge, reduce production costs and improve work efficiency.

Description

A Die-cutting Process for Thick Foam without Knife Marks

technical field

The invention relates to a die-cutting process without knife marks, in particular to a die-cutting process without knife marks for thick foam, and belongs to the technical field of die-cutting.

Background technique

With the rapid development of science and technology, for electronic products, a large amount of cushioning materials will be used in the application process. These cushioning materials are mostly foaming foam in the die-cutting industry, referred to as foam.

During the die-cutting process of foam-containing die-cut parts, it is easy to remove the foam and double-sided tape in the product during the die-cutting process, resulting in a product drop rate of over 90%. If you want to reduce the product drop rate, Manual assistance must be provided during waste discharge.

With the development of the TFT-LCD liquid crystal panel industry, the application of foam glue in LCD is very mature, but the application in OLED flexible products has yet to be developed. The use of foam glue will be more extensive, and foam glue has unique properties. , for the curved surface, the matching of the concave-convex surface is quite strict, and the application has a certain thickness to play a role in shading. These functions will be better applied in OLED. With the development of the optoelectronic industry, the technical requirements of the die-cutting industry The die-cutting of foam tape is becoming more and more difficult, especially for products with thick and small materials, the error is plus or minus 0.1mm, for the thickness of foam tape is within 1mm, and the width is within 2mm, the product It is easy to deform, have beveled edges, burrs, knife marks, and glue overflow. Therefore, a die-cutting process for thick foam without knife marks is proposed.

Contents of the invention

In view of this, the present invention hopes to provide a thick foam die-cutting process without knife marks to solve or alleviate the technical problems in the prior art, and at least provide a beneficial option.

The technical solution of the embodiment of the present invention is achieved in this way: a die-cutting process for thick foam without knife marks, comprising the following steps:

S1. The thick foam after peeling off the backing paper is sent into the gap machine in a step-by-step manner, and the double-sided adhesive bonded together by the isolation film and the bottom film is also sent into the gap machine in a step-by-step manner. Die cutting during the time period when both cotton and double-sided tape stop stepping;

S2, the side knife line for die-cutting the edge parts on both sides of the thick foam, and the waste discharge longitudinal knife line for die-cutting the two sides of the isolation film for waste discharge;

S3. Lay a silicone protective film on the thick foam, turn the tape over, and discharge the single-sided adhesive and the release film in sequence, and then attach a cover film on the double-sided adhesive to form a tape;

S4, carry out die-cutting on the strip in the die-cutting machine, and discharge the waste including the cover film;

S5. After each die-cutting, the thick foam and the double-sided adhesive step each; then discharge the waste from the outer periphery of the isolation membrane unit;

S6. Lamination and winding of finished foam die-cut pieces: Lay the product release film on the foam to obtain finished foam die-cut pieces, which are then rolled.

Further preferably: the side knife line includes a side horizontal knife line and a side vertical knife line, the lower end of the side vertical knife line is vertically connected to the inner side of the side horizontal knife line, and the upper end of the side vertical knife line is vertically intersected with the lower horizontal knife line , the two ends of the upper horizontal knife line intersect with the side knife lines on both sides respectively.

Further preferably: the heights of the lower horizontal knife line, upper horizontal knife line, side knife line, and waste discharge vertical knife line are equal and greater than the height of the side knife line; the side knife line only die-cuts thick foam; the lower horizontal knife line Wire die-cuts thick foam and release film simultaneously.

Further preferably: the cutting of the middle body part of the thick foam due to the lower horizontal knife line, each step, the middle body part of the thick foam forms a thick foam with a width equal to the step distance X of the thick foam in the longitudinal direction The cotton unit is bonded to the surface of the isolation film; if the number of die-cuts and the number of steps are calculated when the number of steps is 0 after a certain step, after stepping N times, when the N+1 die-cut is performed, the upper horizontal knife line and the The cutting line of the side knife line to the middle body part of the separator is surrounded by the cutting line of the lower horizontal knife line to the middle body part of the separator in the first die-cutting to form a separator unit.

Further preferably: the waste materials also include foam and border waste materials around the double-sided adhesive tape.

Further preferably: the die-cutting machine is provided with a knife line b matching the die-cutting pattern, and the die-cutting layers of the knife line b include cover film, double-sided adhesive tape and thick foam from top to bottom.

Further preferred: stepping distance X=1.75mm, double-sided tape stepping distance Y=4.4mm, distance T=10.60mm between upper horizontal knife line and lower horizontal knife line, side horizontal knife line and lower horizontal knife line The distance between them is U=2.2mm, and the length of the side knife line in the longitudinal direction is W=2.2mm.

Further preferred: N=4 or 5.

Further preferably: the distance E between the upper knife line on the side and the longitudinal knife line on the same side=thick foam stepping distance X/2±0.2mm.

A non-knife-printed foam die-cut piece manufactured by a method that avoids manual waste discharge, the die-cut piece sequentially includes a material base film, double-sided adhesive tape, thick foam and a product release film.

Embodiments of the present invention have the following advantages due to the adoption of the above technical solutions:

1. In the die-cutting process, the present invention intends to discharge the release film after die-cutting, that is, when the closed shape of the product is not formed. At this time, although the bonding force between the release film and the double-sided adhesive is greater than that of foam The adhesion between the silicone protective film and the silicone protective film, but because the closed shape of the product is not formed, the product area will not be taken away due to the discharge of the release film, which fundamentally prevents the phenomenon of chipping.

2. The present invention does not need to replace the bottom film in the process, which facilitates waste discharge, reduces production costs, and improves work efficiency;

3. The present invention is designed as a step-by-step structure diagram of the product through the cutting die. On the same cutting die, the upper and lower parts are designed separately. The upper horizontal cutting line and the lower horizontal cutting line are not designed according to the shape of the product, but There is a certain distance (greater than the shape of the product) to reduce the occurrence of glue overflow, deformation and other undesirable phenomena during the die-cutting process, especially suitable for die-cutting production of small-sized products;

4. In the die-cutting process, the use of auxiliary materials is reduced, and the waste is discharged together with the bottom film, and the method is simple. 4. Since the distance U between the side horizontal knife line and the lower horizontal knife line>the thick foam step distance X, there is no thick foam on the tearing hand on one side of the thick foam unit, and there will be no thick foam on the tearing hand. Due to the thick foam that needs to be die-cut, knife marks appear to avoid colloid back-off and delamination.

The above summary is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments and features described above, further aspects, embodiments and features of the present invention will be readily apparent by reference to the drawings and the following detailed description.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application or in the prior art, the following will briefly introduce the drawings that need to be used in the embodiments or technical descriptions. Obviously, the drawings in the following description are only For some embodiments of the present application, those of ordinary skill in the art can also obtain other drawings based on these drawings without creative effort.

Fig. 1 is a flow chart of the die-cutting process of thick foam without knife marks of the present invention.

Detailed ways

In the following, only some exemplary embodiments are briefly described. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. Accordingly, the drawings and descriptions are to be regarded as illustrative in nature and not restrictive.

Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

Example

As shown in Figure 1, an embodiment of the present invention provides a die-cutting process for thick foam without knife marks, including the following steps:

S1. The thick foam after peeling off the backing paper is sent into the gap machine in a step-by-step manner, and the double-sided adhesive bonded together by the isolation film and the bottom film is also sent into the gap machine in a step-by-step manner. Die-cutting is carried out during the time period when both cotton and double-sided tape stop stepping, the stepping distance X=1.75mm, the stepping distance of double-sided tape Y=4.4mm, the distance T between the upper horizontal knife line and the lower horizontal knife line =10.60mm, the distance U between the side horizontal knife line and the lower horizontal knife line=2.2mm, and the length of the side knife line in the longitudinal direction W=2.2mm.

S2. The side knife line for die-cutting the edge parts on both sides of the thick foam, and the waste discharge vertical knife line for die-cutting the two sides of the isolation film for waste discharge. The side knife line includes side horizontal knife line, side vertical knife line The lower end of the side vertical knife line is vertically connected to the inner side of the side horizontal knife line, the upper end of the side vertical knife line is perpendicular to the lower horizontal knife line, and the two ends of the upper horizontal knife line intersect with the side knife lines on both sides respectively. The lower horizontal knife line, the upper horizontal knife line, the side knife line, and the waste vertical knife line have the same height and are greater than the height of the side knife line; the side knife line only die-cuts thick foam; Cotton and isolation film are die-cut at the same time;

S3. Lay a silicone protective film on the thick foam, turn the tape over, and discharge the single-sided adhesive and the release film in sequence, and then attach a cover film on the double-sided adhesive to form a tape;

S4. Die-cut the material tape in a die-cutting machine, and discharge the waste including the cover film. The cutting of the middle body part of the thick foam by the lower horizontal knife line, each step, the thickness of the foam The middle body part of the cotton forms a thick foam unit with a width equal to the step distance X of the thick foam in the longitudinal direction and is bonded to the surface of the isolation film; After stepping N times, when performing N+1 die-cutting, the cutting line between the upper horizontal knife line and the side knife line on the middle main part of the separator, N=4 or 5, is the same as that of the lower horizontal knife during the first die-cutting The line surrounds the cutting line of the middle main part of the isolation film to form an isolation film unit. The distance between the upper knife line on the side and the vertical knife line on the same side is E=thick foam stepping distance X/2±0.2mm;

S5. After each die-cutting, the thick foam and the double-sided adhesive step each step once; then the waste on the outer periphery of the isolation membrane unit can be discharged, and the waste also includes the peripheral frame waste of the foam and the double-sided adhesive. The die-cutting machine is provided with a knife line b matching the die-cutting pattern, and the die-cutting layers of the knife line b include cover film, double-sided adhesive tape and thick foam from top to bottom;

S6. Lamination and winding of finished foam die-cut pieces: Lay the product release film on the foam to obtain finished foam die-cut pieces, which are then rolled.

A non-knife-printed foam die-cut piece manufactured by a method that avoids manual waste discharge, the die-cut piece sequentially includes a material base film, double-sided adhesive tape, thick foam and a product release film.

1. In the die-cutting process, the present invention intends to discharge the release film after die-cutting, that is, when the closed shape of the product is not formed. At this time, although the bonding force between the release film and the double-sided adhesive is greater than that of foam The adhesion between the silicone protective film and the silicone protective film, but because the closed shape of the product is not formed, the product area will not be taken away due to the discharge of the release film, which fundamentally prevents the phenomenon of chipping.

2. The present invention does not need to replace the bottom film in the process, which facilitates waste discharge, reduces production costs, and improves work efficiency;

3. The present invention is designed as a step-by-step structure diagram of the product through the cutting die. On the same cutting die, the upper and lower parts are designed separately. The upper horizontal cutting line and the lower horizontal cutting line are not designed according to the shape of the product, but There is a certain distance (greater than the shape of the product) to reduce the occurrence of glue overflow, deformation and other undesirable phenomena during the die-cutting process, especially suitable for die-cutting production of small-sized products;

4. In the die-cutting process, the use of auxiliary materials is reduced, and the waste is discharged together with the bottom film, and the method is simple. 4. Since the distance U between the side horizontal knife line and the lower horizontal knife line>the thick foam step distance X, there is no thick foam on the tearing hand on one side of the thick foam unit, and there will be no thick foam on the tearing hand. Due to the thick foam that needs to be die-cut, knife marks appear to avoid colloid back-off and delamination.

The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person familiar with the technical field can easily think of its various changes or modifications within the technical scope disclosed in the present invention. Replacement, these should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the protection scope of the claims.

Claims (10)

1. A die-cutting process without knife marks for thick foam, is characterized in that, comprises the following steps: S1. The thick foam after peeling off the backing paper is sent into the gap machine in a step-by-step manner, and the double-sided adhesive bonded together by the isolation film and the bottom film is also sent into the gap machine in a step-by-step manner. Die cutting during the time period when both cotton and double-sided tape stop stepping; S2, the side knife line for die-cutting the edge parts on both sides of the thick foam, and the waste discharge longitudinal knife line for die-cutting the two sides of the isolation film for waste discharge; S3. Lay a silicone protective film on the thick foam, turn the tape over, and discharge the single-sided adhesive and the release film in sequence, and then attach a cover film on the double-sided adhesive to form a tape; S4, carry out die-cutting on the strip in the die-cutting machine, and discharge the waste including the cover film; S5. After each die-cutting, the thick foam and the double-sided adhesive step each; then discharge the waste from the outer periphery of the isolation membrane unit; S6. Lamination and winding of finished foam die-cut pieces: Lay the product release film on the foam to obtain finished foam die-cut pieces, which are then rolled. 2. A die-cutting process for thick foam without knife marks according to claim 1, characterized in that: the side knife line includes a side horizontal knife line, a side vertical knife line, and the lower end of the side vertical knife line is connected to the side horizontal knife line. The inner ends of the knife lines are vertically connected, the upper end of the side longitudinal knife lines intersects the lower horizontal knife lines perpendicularly, and the two ends of the upper horizontal knife lines intersect with the side knife lines on both sides respectively. 3. A die-cutting process for thick foam without knife marks according to claim 2, characterized in that: the heights of the lower horizontal knife line, the upper horizontal knife line, the side knife line, and the waste vertical knife line are equal, and Greater than the height of the side knife line; the side knife line only die-cuts the thick foam; the lower horizontal knife line die-cuts the thick foam and the isolation film at the same time. 4. A kind of die-cutting process for thick foam without knife marks according to claim 1, characterized in that: the cutting of the middle body part of thick foam due to the lower horizontal knife line, every time stepping, thick foam The middle body part of the cotton forms a thick foam unit with a width equal to the step distance X of the thick foam in the longitudinal direction and is bonded to the surface of the isolation film; After stepping N times, when performing N+1 die-cutting, the cutting line between the upper horizontal knife line and the side knife line on the middle body of the separator, and the lower horizontal knife line on the middle of the separator during the first die-cutting The cut lines of the main body are surrounded to form the isolation membrane unit. 5. A die-cutting process for thick foam without knife marks according to claim 1, characterized in that: the waste also includes foam and border waste around the double-sided adhesive tape. 6. A kind of die-cutting process for thick foam without knife marks according to claim 1, characterized in that: said die-cutting machine is provided with a knife line b matching the die-cutting pattern, and said knife line b The die-cut layer includes cover film, double-sided adhesive tape and thick foam from top to bottom. 7. A die-cutting process for thick foam without knife marks according to claim 1, characterized in that: the step distance X=1.75mm, the double-sided adhesive step distance Y=4.4mm, the upper horizontal knife line and the lower The distance between the horizontal knife lines is T=10.60mm, the distance between the side horizontal knife lines and the lower horizontal knife lines is U=2.2mm, and the length of the side knife lines in the longitudinal direction is W=2.2mm. 8. A die-cutting process for thick foam without knife marks according to claim 4, characterized in that: N=4 or 5. 9. A die-cutting process for thick foam without knife marks according to claim 1, characterized in that: the distance E between the upper knife line on the side and the vertical knife line on the same side = thick foam step distance X /2±0.2mm. 10. A non-knife-printed foam die-cut piece that avoids manual waste discharge made by the method according to any one of claims 1-9, characterized in that, the die-cut piece comprises a material bottom film and double-sided adhesive successively , thick foam and product release film.

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