A micro-hole circular die-cutting process for adhesive films

Abstract

This invention provides a die-cutting process for ultra-small holes in adhesive films using a circular die, comprising the following steps: Step 1, Material Processing: Selecting a suitable adhesive film material for die-cutting, pre-treating the material, and sequentially bonding the release film, adhesive film, and protective film to form a strip; Step 2, Tool Design: Designing and manufacturing a die-cutting circular die, an ejector pin waste removal circular die, and a pressure testing mold; Step 3, Die-cutting Machine Parameter Setting: Adjusting the parameters of the die-cutting machine. This invention, by installing die-cutting circular dies, ejector pin waste removal circular dies, and pressure testing molds of the same diameter on a die-cutting machine, and maintaining synchronous rotation of these dies during ultra-small hole processing, can automatically complete die-cutting, waste removal, and testing, improving the automation level of ultra-small hole processing. Simultaneously, the pressure testing mold is used to detect the dimensions of the ultra-small holes, making the detection process convenient and fast, improving detection accuracy and product quality, and reducing production costs.

Description

Technical Field

[0001] This invention relates to a die-cutting process, and more particularly to a micro-hole circular die-cutting process for adhesive films, belonging to the field of adhesive film die-cutting processing technology. Background Technology

[0002] Adhesive films are thin, sticky materials commonly used for various bonding and fixing applications. They typically consist of a substrate, an adhesive layer, and a release layer, and possess excellent adhesion, weather resistance, and temperature resistance. Adhesive films have wide applications in industrial production, daily life, and specialized fields. Micro-perforation die-cutting of adhesive films is a specialized process used in the die-cutting industry. It typically employs a rotary die-cutting machine to process adhesive materials. In the electronics industry, micro-perforated adhesive film products are used for fixing, sealing, dustproofing, shockproofing, and protection between components.

[0003] In the process of processing ultra-small holes in adhesive films, due to the small size of the ultra-small holes on the surface of the adhesive film, it is difficult to directly measure whether the size of the ultra-small holes is qualified by measuring tools, and the accuracy of manual measurement is insufficient, which leads to a decline in product quality. Using visual inspection equipment for inspection will increase the production cost of adhesive films. Therefore, a circular die-cutting process for ultra-small holes in adhesive films is proposed. Summary of the Invention

[0004] In view of this, the present invention provides a micro-hole circular die-cutting process for adhesive films to solve or alleviate the technical problems existing in the prior art, and at least provides a beneficial alternative.

[0005] The technical solution of this invention is implemented as follows: a micro-hole circular die-cutting process for adhesive films, comprising the following steps:

[0006] Step 1, Material Processing: Select a suitable adhesive film material for die cutting, pre-treat the material, and then sequentially laminate the release film, adhesive film, and protective film to form a material strip;

[0007] Step 2, Tool Design: Design and manufacture die-cutting circular blade, ejector pin waste removal circular blade, and air pressure testing mold;

[0008] Step 3: Die-cutting machine parameter settings: Adjust the parameters of the die-cutting machine;

[0009] Step 4: Die-cutting operation: Install the cutter on the die-cutting machine, put in the material strip, and perform die-cutting;

[0010] Step 5, Waste Removal Operation: Waste is removed using a ejector pin waste removal circular knife and a waste roller;

[0011] Step Six: Air Pressure Test: Use an air pressure test mold to check whether the size of the ultra-small hole is up to standard;

[0012] Step 7: Product winding: Peel off the protective film and wind up the adhesive film.

[0013] Further preferred embodiment: In step one, the adhesive film material uses one of the following materials as the substrate: polyethylene terephthalate, biaxially oriented polypropylene, polyethylene, ethylene-vinyl acetate copolymer, polyethylene resin, polyimide, or metal foil, and the surface is coated with one of the following: acrylic pressure-sensitive adhesive, water-based pressure-sensitive adhesive, oil-based pressure-sensitive adhesive, solvent-based pressure-sensitive adhesive, or hot-melt pressure-sensitive adhesive.

[0014] A further preferred embodiment: In step one, the pretreatment includes cleaning, dust removal, and drying of the material.

[0015] A further preferred embodiment: In step one, the strip consists of a release film, an adhesive film, and a protective film, arranged from top to bottom.

[0016] Further preferred embodiment: In step two, high-speed steel or powder steel is selected to make the die-cutting circular blade. The surface of the die-cutting circular blade is provided with a cutting edge for processing ultra-small holes. The surface of the ejector pin waste removal circular blade is provided with a waste removal ejector pin. The air pressure detection mold is a circular blade mold. The surface of the air pressure detection mold is provided with a detection hole. The air pressure detection mold has an internal hollow structure, with one end connected to an air source. An air pressure sensor is installed inside the air pressure detection mold. The die-cutting circular blade, the ejector pin waste removal circular blade, and the air pressure detection mold have the same diameter.

[0017] Further preferred: In step three, the parameters of the die-cutting machine include the cutter speed, die-cutting depth, and feeding speed, wherein the die-cutting circular cutter, the ejector pin waste removal circular cutter, and the air pressure detection mold have the same speed.

[0018] A further preferred embodiment: In step four, the protective film and adhesive film are die-cut using a cutting blade during the die-cutting process, and the die-cutting stops after the cutting blade reaches the surface of the release film.

[0019] A further preferred embodiment: In step five, the release film and waste are wound up by the waste roller. When the release film separates from the adhesive film, the waste material with ultra-small holes is ejected by the ejector pin and waste discharge round knife, so that the waste material combines with the release paper and is discharged together.

[0020] Further preferred embodiment: In step six, the air pressure detection process specifically includes:

[0021] By supplying air into the air pressure testing mold through an air source, the sealing performance of the air pressure testing mold is checked.

[0022] During the die-cutting process, the air pressure detection mold rotates synchronously with the die-cutting circular knife and the ejector pin waste discharge circular knife, and the gas enters the ultra-small holes on the surface of the adhesive film through the detection hole;

[0023] When the processing of ultra-small holes fails to meet the standards, the exhaust flow of the air pressure detection mold changes. The air pressure sensor sends the air pressure change to the die-cutting machine control system. If the product is abnormal, an alarm will be triggered.

[0024] A further preferred embodiment: In step six, the signal output terminal of the air pressure sensor is connected to the signal input terminal of the die-cutting machine control system.

[0025] The embodiments of the present invention have the following advantages due to the adoption of the above technical solutions:

[0026] This invention automatically completes die-cutting, waste removal, and inspection by installing die-cutting circular blades, ejector pin waste removal circular blades, and air pressure testing molds of the same diameter on a die-cutting machine, and keeping these three components rotating synchronously during the ultra-small hole processing. This improves the automation level of ultra-small hole processing. At the same time, the air pressure testing mold is used to inspect the size of the ultra-small holes, making the inspection process convenient and fast, improving inspection accuracy and product quality, and reducing production costs.

[0027] The above overview 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 invention will become readily apparent from the accompanying drawings and the following detailed description. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a flowchart of the present invention. Detailed Implementation

[0030] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the invention. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0031] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Example 1

[0032] like Figure 1 As shown, this embodiment of the invention provides a micro-hole circular die-cutting process for adhesive films, including the following steps:

[0033] Step 1, Material Processing: Select adhesive film material. The adhesive film material uses polyethylene terephthalate as the base material and is coated with acrylic pressure-sensitive adhesive. Pre-treat the material, including cleaning, dust removal and drying. Lay the release film, adhesive film and protective film in sequence to form a strip. The strip is arranged from top to bottom as release film, adhesive film and protective film.

[0034] Step 2, Tool Design: Design and manufacture the die-cutting circular blade, ejector pin waste removal circular blade, and air pressure testing mold. High-speed steel is selected to make the die-cutting circular blade. The surface of the die-cutting circular blade is provided with a cutting edge for processing ultra-small holes. The surface of the ejector pin waste removal circular blade is provided with waste removal ejector pins. The air pressure testing mold is a circular blade mold. The surface of the air pressure testing mold is provided with a detection hole. The air pressure testing mold has an internal hollow structure, with one end connected to the air source. An air pressure sensor is installed inside the air pressure testing mold. The die-cutting circular blade, ejector pin waste removal circular blade, and air pressure testing mold have the same diameter.

[0035] Step 3, Parameter Settings: Adjust the parameters of the die-cutting machine. The parameters of the die-cutting machine include the cutter speed, die-cutting depth, and feeding speed. The cutting circular cutter, ejector pin waste removal circular cutter, and air pressure detection mold have the same speed.

[0036] Step 4, Die-cutting operation: Install the cutter on the die-cutting machine, put in the material strip, and perform die-cutting. During the die-cutting process, the protective film and adhesive film are die-cut by the cutting blade. The die-cutting is stopped after the cutting blade reaches the surface of the release film.

[0037] Step 5, Waste Discharge Operation: Waste is discharged using the ejector pin waste discharge round knife and waste roller. The waste roller rolls up the release film and waste. When the release film separates from the adhesive film, the ejector pin waste discharge round knife pushes out the waste with the tiny holes, so that the waste combines with the release paper and is discharged together.

[0038] Step Six: Air Pressure Testing: Use an air pressure testing mold to check whether the ultra-small hole size is up to standard. The air pressure testing process specifically includes:

[0039] By supplying air into the air pressure testing mold through an air source, the sealing performance of the air pressure testing mold is checked.

[0040] During the die-cutting process, the air pressure detection mold rotates synchronously with the die-cutting circular knife and the ejector pin waste discharge circular knife, and the gas enters the ultra-small holes on the surface of the adhesive film through the detection hole;

[0041] When the processing of ultra-small holes fails to meet the standard, the exhaust flow of the air pressure detection mold changes. The air pressure sensor sends the air pressure change to the die-cutting machine control system. If the product is abnormal, an alarm will be triggered.

[0042] Step 7: Product winding: Peel off the protective film and wind up the adhesive film.

[0043] In this invention, during equipment installation, the signal output terminal of the air pressure sensor is connected to the signal input terminal of the die-cutting machine control system. The die-cutting circular blade, the ejector pin waste removal circular blade, and the air pressure detection mold are controlled by a servo motor to maintain synchronous movement, or by a gear or chain transmission structure. This ensures that after the die-cutting circular blade cuts the ultra-small hole, the ejector pin on the ejector pin waste removal circular blade can accurately eject the waste material from the ultra-small hole, and the detection hole of the air pressure detection mold can be aligned with the ultra-small hole, thus ensuring the normal operation of the die-cutting machine.

[0044] In this invention, the position, shape, and number of cutting blades on the die-cutting circular knife are designed according to the actual needs of the product. The ejector pin waste discharge circular knife and the ejector pin and detection hole on the air pressure detection mold are designed according to the position, number, and size of the ultra-small hole. The air pressure detection mold is provided with two sets, one set of detection holes with the same shape and size as the ultra-small hole, and the other set of detection holes with a size slightly larger than the size of the ultra-small hole.

[0045] The release film in the strip is used to remove the waste material after the adhesive film is die-cut, and the protective film is used to protect the adhesive film and prevent it from breaking or deforming during processing.

[0046] During the die-cutting process, the release film, adhesive film, and protective film are pressed together by pressure rollers to form a strip. The strip is then die-cut by a die-cutting circular knife. After die-cutting, waste is removed by an ejector pin waste removal circular knife. After waste removal, the product is inspected by an air pressure testing mold. If the product passes the inspection, it is wound up; otherwise, an alarm is triggered to remind the staff to adjust the die-cutting machine in a timely manner.

[0047] During die-cutting, the die-cutting circular blade cuts from one side of the protective film. The cutting blade cuts both the protective film and the adhesive film. The die-cutting stops when the cutting blade reaches the surface of the release film, so that the waste material can be peeled off together when the release film is removed.

[0048] During the testing process, the die-cut strip passes through the outer wall of the pneumatic testing mold with a certain pressure and a certain wrapping angle. The pneumatic testing mold is ventilated, and the gas is discharged through the detection hole. When the detection hole is not in contact with the strip, the gas is directly discharged into the external environment. When the detection hole is in contact with the strip, the gas is discharged into the external environment after passing through the detection hole and the micro-hole on the strip. Since the die-cutting circular knife, the ejector pin waste discharge circular knife and the pneumatic testing mold have the same diameter and the same rotation speed, the detection hole and the micro-hole on the strip can be automatically aligned during the rotation of the pneumatic testing mold. If the position, size or shape of the micro-hole is abnormal, an alarm will be triggered.

[0049] The two sets of air pressure testing molds play different roles in the testing process. When the ultra-small orifice has abnormal position, small size, or abnormal shape, the air pressure testing mold with the same shape and size as the ultra-small orifice will have its exhaust blocked, and the air pressure value will increase. When the ultra-small orifice has a large size, the air flow rate in the testing mold with the larger size of the ultra-small orifice will be higher than the normal value, and the air pressure value will be lower than the normal value. The testing is completed by the cooperation of the two sets of air pressure testing molds. Example 2

[0050] like Figure 1 As shown, this embodiment of the invention provides a micro-hole circular die-cutting process for adhesive films, including the following steps:

[0051] Step 1, Material Processing: Select adhesive film material. The adhesive film material is biaxially oriented polypropylene and polyethylene, and the surface is coated with water-based pressure-sensitive adhesive. Pre-treat the material, including cleaning, dust removal and drying. Lay the release film, adhesive film and protective film in sequence to form a strip. The strip is arranged from top to bottom as release film, adhesive film and protective film.

[0052] Step 2, Tool Design: Design and manufacture the die-cutting circular knife, ejector pin waste removal circular knife, and air pressure testing mold. Select powder steel to make the die-cutting circular knife. The surface of the die-cutting circular knife is provided with a cutting edge for processing ultra-small holes. The surface of the ejector pin waste removal circular knife is provided with waste removal ejector pins. The air pressure testing mold is a circular knife mold. The surface of the air pressure testing mold is provided with detection holes. The air pressure testing mold has an internal hollow structure, with one end connected to the air source. An air pressure sensor is installed inside the air pressure testing mold. The die-cutting circular knife, ejector pin waste removal circular knife, and air pressure testing mold have the same diameter.

[0053] Step 3, Parameter Settings: Adjust the parameters of the die-cutting machine. The parameters of the die-cutting machine include the cutter speed, die-cutting depth, and feeding speed. The cutting circular cutter, ejector pin waste removal circular cutter, and air pressure detection mold have the same speed.

[0054] Step 4, Die-cutting operation: Install the cutter on the die-cutting machine, put in the material strip, and perform die-cutting. During the die-cutting process, the protective film and adhesive film are die-cut by the cutting blade. The die-cutting is stopped after the cutting blade reaches the surface of the release film.

[0055] Step 5, Waste Discharge Operation: Waste is discharged using the ejector pin waste discharge round knife and waste roller. The waste roller rolls up the release film and waste. When the release film separates from the adhesive film, the ejector pin waste discharge round knife pushes out the waste with the tiny holes, so that the waste combines with the release paper and is discharged together.

[0056] Step Six: Air Pressure Testing: Use an air pressure testing mold to check whether the ultra-small hole size is up to standard. The air pressure testing process specifically includes:

[0057] By supplying air into the air pressure testing mold through an air source, the sealing performance of the air pressure testing mold is checked.

[0058] During the die-cutting process, the air pressure detection mold rotates synchronously with the die-cutting circular knife and the ejector pin waste discharge circular knife, and the gas enters the ultra-small holes on the surface of the adhesive film through the detection hole;

[0059] When the processing of ultra-small holes fails to meet the standard, the exhaust flow of the air pressure detection mold changes. The air pressure sensor sends the air pressure change to the die-cutting machine control system. If the product is abnormal, an alarm will be triggered.

[0060] Step 7: Product winding: Peel off the protective film and wind up the adhesive film.

[0061] In the above embodiments, the descriptions of each embodiment have different focuses. Parts not described in detail or in a particular embodiment can be referred to in the relevant descriptions of other embodiments. The steps in the embodiments of the present invention can be adjusted, combined, or deleted according to actual needs.

[0062] This invention automatically completes die-cutting, waste removal, and inspection by installing die-cutting circular blades, ejector pin waste removal circular blades, and air pressure testing molds of the same diameter on a die-cutting machine, and keeping these three components rotating synchronously during the ultra-small hole processing. This improves the automation level of ultra-small hole processing. At the same time, the air pressure testing mold is used to inspect the size of the ultra-small holes, making the inspection process convenient and fast, improving inspection accuracy and product quality, and reducing production costs.

[0063] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various variations or substitutions within the technical scope disclosed in the present invention, and these should all be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A process for die cutting of a gummed film with ultra small holes using a circular knife, characterized in that, Includes the following steps: Step 1, Material Processing: Select adhesive film material, pre-treat the material, and then sequentially laminate the release film, adhesive film, and protective film to form a material strip; Step 2, Tool Design: Design and manufacture a die-cutting circular blade, an ejector pin waste removal circular blade, and a pneumatic pressure testing mold. Select high-speed steel or powder steel to make the die-cutting circular blade. The surface of the die-cutting circular blade is provided with a cutting edge for processing ultra-small holes. The surface of the ejector pin waste removal circular blade is provided with a waste removal ejector pin. The pneumatic pressure testing mold is a circular blade mold with a detection hole on its surface. The pneumatic pressure testing mold has an internal hollow structure, with one end connected to an air source. A pneumatic pressure sensor is installed inside the pneumatic pressure testing mold. The die-cutting circular blade, the ejector pin waste removal circular blade, and the pneumatic pressure testing mold have the same diameter. Step 3, Parameter Settings: Adjust the parameters of the die-cutting machine. The parameters of the die-cutting machine include the cutter speed, die-cutting depth, and feeding speed. The cutting circular cutter, ejector pin waste removal circular cutter, and air pressure detection mold have the same speed. Step 4: Die-cutting operation: Install the cutter on the die-cutting machine, put in the material strip, and perform die-cutting; Step 5, Waste Removal Operation: Waste is removed using a ejector pin waste removal circular knife and a waste roller; Step Six: Air Pressure Test: Use an air pressure test mold to check whether the size of the ultra-small hole is up to standard; Step 7: Product winding: Peel off the protective film and wind up the adhesive film.

2. A process for die cutting of a gummed sheet material as claimed in claim 1 wherein: In step one, the adhesive film material uses one of the following materials as a substrate: polyethylene terephthalate, biaxially oriented polypropylene, polyethylene, ethylene-vinyl acetate copolymer, polyethylene resin, polyimide, or metal foil, and its surface is coated with one of the following: acrylic pressure-sensitive adhesive, water-based pressure-sensitive adhesive, oil-based pressure-sensitive adhesive, solvent-based pressure-sensitive adhesive, or hot-melt pressure-sensitive adhesive.

3. The process as claimed in claim 1, wherein the process is a process of die cutting of a super small hole round knife with adhesive film. In step one, the pretreatment includes cleaning, dust removal, and drying of the material.

4. The process as claimed in claim 1, wherein the process is a gummed film micro-perforated round die cutting process. In step one, the strip consists of a release film, an adhesive film, and a protective film from top to bottom.

5. The ultra-small hole circular die-cutting process for adhesive films according to claim 1, characterized in that: In step four, the protective film and adhesive film are die-cut using a cutting blade during the die-cutting process. Die-cutting stops when the cutting blade reaches the surface of the release film.

6. The ultra-small hole circular die-cutting process for adhesive films according to claim 1, characterized in that: In step five, the release film and waste are wound up by the waste roller. When the release film separates from the adhesive film, the waste material with ultra-small holes is ejected by the ejector pin and waste discharge round knife, so that the waste material combines with the release paper and is discharged together.

7. The ultra-small hole circular die-cutting process for adhesive films according to claim 1, characterized in that: In step six, the air pressure detection process specifically includes: By supplying air into the air pressure testing mold through an air source, the sealing performance of the air pressure testing mold is checked. During the die-cutting process, the air pressure detection mold rotates synchronously with the die-cutting circular knife and the ejector pin waste discharge circular knife, and the gas enters the ultra-small holes on the surface of the adhesive film through the detection hole; When the processing of ultra-small holes fails to meet the standards, the exhaust flow of the air pressure detection mold changes. The air pressure sensor sends the air pressure change to the die-cutting machine control system. If the product is abnormal, an alarm will be triggered.

8. The ultra-small hole circular die-cutting process for adhesive films according to claim 1, characterized in that: In step six, the air pressure detection mold is provided in two sets, and the detection hole size of the two sets of air pressure detection molds is equal to and larger than the ultra-small hole, respectively. The signal output terminal of the air pressure sensor is connected to the signal input terminal of the die-cutting machine control system.

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