A round knife die cutting process for insulating adhesive sheets

Abstract

The application provides a round knife die-cutting process of insulating adhesive sheet, which comprises the following steps: preparing an integrated composite tape by bonding a first insulating tape, a second insulating tape and a PET adhesive tape, the two types of insulating tapes are double-sided adhesive structure and are arranged side by side along the width direction, the round knife mechanism synchronously completes the roll cutting of the product contour profile and the pre-preparation of the PET adhesive tape center crease, and the folding area is quantitatively segmented according to the set product quantity, the segmented line is cut to the crease position, then the folding jig is used to realize online continuous folding and pressing, and finally the single separation is completed through the cutting station to obtain the finished product. The application realizes the continuous integrated processing of the round knife, does not need manual intervention and additional driving components, has high folding precision, good product consistency, high qualified rate, and is suitable for the large-batch automatic production of precise insulating adhesive sheets.

Description

Technical Field

[0001] This invention relates to the field of die-cutting technology, specifically a circular die-cutting process for insulating films. Background Technology

[0002] A product manufactured using die-cutting of insulating film requires folding after punching one side of the product due to its structural needs. Currently, the industry commonly uses a production mode where the product is first directly cut into shape with a cutting tool, and then manually folded. Manual folding is time-consuming, results in high production time losses, and has low overall production capacity, making it unable to meet the needs of large-volume orders. In addition, manual folding relies entirely on the operator's feel and experience, leading to uneven force, misaligned and uneven folded edges, poor appearance consistency, and a high overall defect rate. Summary of the Invention

[0003] The purpose of this invention is to provide a circular die-cutting process for insulating films to solve the technical problems in the background art.

[0004] To achieve the aforementioned objectives, the present invention provides the following technical solution:

[0005] A circular die-cutting process for insulating films includes the following steps:

[0006] Step S1: Prepare a composite tape, which includes a first insulating tape, a second insulating tape, and a PET tape. The second insulating tape and the first insulating tape are arranged along the width direction. The PET tape is disposed below the first insulating tape and the second insulating tape. The PET tape is used to bond the first insulating tape and the second insulating tape. Both the first insulating tape and the second insulating tape are coated with adhesive on both sides to form an integrated composite tape.

[0007] Step S2: Cut the outline and creases. Using the first set of circular cutter mechanisms, the outlines of the first insulating material tape and the second insulating material tape attached to the PET tape side are rolled and cut. The edge of the rolled product does not detach from the composite material tape. At the same time, creases are rolled and cut along the length of the composite material tape at the center of the PET tape to form a semi-finished material tape.

[0008] Step S3, continuous folding: A folding fixture is set on the continuous conveying path of the semi-finished material strip. The continuous semi-finished material strip with the outer contour already cut passes through the folding fixture as it is conveyed. Using the crease on the PET tape as the bending reference, the second insulating material strip is folded along the crease, so that the second insulating material strip is attached to the top of the first insulating material strip, and the product is folded and shaped.

[0009] Step S4: After the material strip is folded and shaped, it is transported to the cutting station for individual cutting and separation to obtain independently folded finished products.

[0010] After completing the shape and contour processing in step S2, the semi-finished material strip is segmented. The area to be folded is segmented and cut according to the set product quantity, and the segmentation line is cut to the crease position on the PET tape.

[0011] The folding fixture includes a base block, which is a rectangular block structure. A feed inlet is provided on one side of the base block. The feed inlet is machined with an inclined guide slope. Below the guide slope is a first channel for the material belt to pass through. The first channel is arranged along the conveying direction of the material belt and communicates with the feed inlet. The first channel is used to allow the main body of the material belt to pass through in a straight line.

[0012] The height of the guide ramp decreases from the feed side to the discharge side, and an arc-shaped guide section is provided above the feed end of the guide ramp.

[0013] The first channel is horizontally set, and the vertical height of the first channel is less than the total free thickness of the first insulating tape, the de-insulating tape, and the PET tape after folding and stacking. The continuous pressing effect is formed by the height limit, so that the two layers of insulating tape are tightly bonded together after folding.

[0014] Compared with existing technologies, the circular die-cutting process for insulating films provided by this invention eliminates the manual folding process. The folding operation of the product is completed simultaneously while the material is being conveyed, which greatly improves production efficiency. In this application, the process relies on a folding jig to achieve continuous folding, pressing and shaping. No additional driving components are required. Folding and pressing can be completed by the tension of the conveying material. With the structural design of the segment line ending at the crease, the bending position of each segment of the product is precisely defined, and the folded edges of the product are neat and uniform. This completely solves the appearance defects of uneven edges caused by manual folding and effectively avoids defects such as misalignment during folding, significantly improving the finished product qualification rate. Attached Figure Description

[0015] Figure 1 : An illustration showing the installation and use effect of the folding fixture in this invention;

[0016] Figure 2 : 3D structural diagram of the folding fixture;

[0017] Figure 3 : Front view of the folding fixture;

[0018] Figure 4 : Figure 3 Enlarged view of point B;

[0019] Figure 5 Side view of the composite strip structure in this invention;

[0020] Figure 6 : Schematic diagram of the folding principle of the composite material strip in this invention;

[0021] Figure 7 A schematic diagram of the three-dimensional structure of a single finished product. Detailed Implementation

[0022] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0023] Specific Implementation Example 1: Please refer to Figures 1 to 7 In this embodiment of the invention, a circular die-cutting process for insulating film includes the following steps:

[0024] Step S1: Prepare composite tape 1. Composite tape 1 includes a first insulating tape 101, a second insulating tape 102, and a PET tape 103. The second insulating tape 102 and the first insulating tape 101 are arranged along the width direction. The PET tape 103 is located below the first insulating tape 101 and the second insulating tape 102. The PET tape 103 is bonded to the first insulating tape 101 and the second insulating tape 102 respectively. Both the first insulating tape 101 and the second insulating tape 102 are coated with adhesive on both sides to form an integrated composite tape 1.

[0025] Step S2 involves cutting the outline and crease C. Using the first set of circular cutter mechanisms 3, the outlines of the first insulating tape 101 and the second insulating tape 102 attached to the PET tape 103 are rolled and cut. The edges of the rolled product do not detach from the composite tape 1. At the same time, a crease C is rolled and cut along the length of the composite tape 1 at the center of the PET tape 103. This crease C serves as the reference line for subsequent bending, resulting in a semi-finished tape. After completing the outline processing in step S2, the semi-finished tape is segmented. The area to be folded is quantitatively segmented according to the set product quantity, and the segmentation line D is precisely cut to the crease C position on the PET tape 103. This achieves quantitative zoning of multiple products without destroying the overall bending reference crease C, ensuring accurate and uniform subsequent folding positions.

[0026] Step S3, continuous folding: A folding fixture 2 is set on the continuous conveying path of the semi-finished material strip. The continuous semi-finished material strip with the outer contour already cut is conveyed through the folding fixture 2. Using the crease C on the PET tape 103 as the bending reference, the second insulating material strip 102 is folded along the crease C, so that the second insulating material strip 102 is attached to the top of the first insulating material strip 101, and the product is folded and shaped.

[0027] Step S4: After the material strip is folded and shaped, it is transported to the cutting station and cut and separated into individual strips according to the width direction of the material strip to obtain independently folded finished products.

[0028] The folding fixture 2 in this application includes a base block 201, which is a rectangular block structure that can be directly assembled into the station of a circular die-cutting production line. A feed inlet is provided on one side of the base block 201, and the feed inlet is machined with an inclined guide slope 202. Below the guide slope 202, there is a first channel 203 for the passage of the material belt. The first channel 203 is arranged along the conveying direction of the material belt and communicates with the feed inlet. The first channel 203 is used to allow the main body of the material belt to pass straight through.

[0029] The height H1 of the guide slope 202 decreases from the feeding side to the discharging side. An arc-shaped guide section A is provided above the feeding end of the guide slope 202, which can flexibly guide the conveyed belt, avoid the belt from jamming or deformation, and ensure a smooth and stable folding process.

[0030] The first channel 203 is horizontally positioned. The vertical height H2 of the first channel 203 is less than the total free thickness of the first insulating tape 101, the second insulating tape, and the PET tape 103 after folding and stacking. This height limit creates a continuous pressing effect, ensuring that the two layers of insulating tape are tightly bonded together. After the tape enters the folding fixture 2, it slides along the inlet into the first channel 203, completing the folding of the first insulating tape 101 into the second insulating tape 102. After folding and entering the first channel 203, the vertical height limit creates a continuous pressing effect on the folded area, ensuring that the two layers of insulating tape are tightly bonded together. This effectively eliminates folding gaps, prevents product rebound and delamination, and improves the folding and bonding accuracy and stability.

[0031] Compared with existing technologies, the circular die-cutting process for insulating films provided by this invention eliminates the manual folding process. The folding operation of the product is completed simultaneously while the material is being conveyed, which greatly improves production efficiency. In this application, the process relies on a folding jig to achieve continuous folding, pressing and shaping. No additional driving components are required. Folding and pressing can be completed by the tension of the conveying material. With the structural design of the segment line ending at the crease, the bending position of each segment of the product is precisely defined, and the folded edges of the product are neat and uniform. This completely solves the appearance defects of uneven edges caused by manual folding and effectively avoids defects such as misalignment during folding, significantly improving the finished product qualification rate.

[0032] It will be apparent to those skilled in the art that the present invention is not limited to the details of the foregoing exemplary embodiments, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0033] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A circular die-cutting process for insulating films, characterized in that: Includes the following steps: Step S1: Prepare a composite tape, which includes a first insulating tape, a second insulating tape, and a PET tape. The second insulating tape and the first insulating tape are arranged along the width direction. The PET tape is disposed below the first insulating tape and the second insulating tape. The PET tape is used to bond the first insulating tape and the second insulating tape. Both the first insulating tape and the second insulating tape are coated with adhesive on both sides to form an integrated composite tape. Step S2: Cut the outline and creases. Using the first set of circular cutter mechanisms, the outlines of the first insulating material tape and the second insulating material tape attached to the PET tape side are rolled and cut. The edge of the rolled product does not detach from the composite material tape. At the same time, creases are rolled and cut along the length of the composite material tape at the center of the PET tape to form a semi-finished material tape. Step S3, continuous folding: A folding fixture is set on the continuous conveying path of the semi-finished material strip. The continuous semi-finished material strip with the outer contour already cut passes through the folding fixture as it is conveyed. Using the crease on the PET tape as the bending reference, the second insulating material strip is folded along the crease, so that the second insulating material strip is attached to the top of the first insulating material strip, and the product is folded and shaped. Step S4: After the material strip is folded and shaped, it is transported to the cutting station for individual cutting and separation to obtain independently folded finished products.

2. The circular die-cutting process for insulating film according to claim 1, characterized in that: After completing the shape and contour processing in step S2, the semi-finished material strip is segmented. The area to be folded is segmented and cut according to the set product quantity, and the segmentation line is cut to the crease position on the PET tape.

3. The circular die-cutting process for insulating film according to claim 2, characterized in that: The folding fixture includes a base block, which is a rectangular block structure. A feed inlet is provided on one side of the base block. The feed inlet is machined with an inclined guide slope. Below the guide slope is a first channel for the material belt to pass through. The first channel is arranged along the conveying direction of the material belt and communicates with the feed inlet. The first channel is used to allow the main body of the material belt to pass through in a straight line.

4. The circular die-cutting process for insulating film according to claim 3, characterized in that: The height of the guide ramp decreases from the feed side to the discharge side, and an arc-shaped guide section is provided above the feed end of the guide ramp.

5. The circular die-cutting process for insulating film according to claim 4, characterized in that: The first channel is horizontally set, and the vertical height of the first channel is less than the total free thickness of the first insulating tape, the de-insulating tape, and the PET tape after folding and stacking. The continuous pressing effect is formed by the height limit, so that the two layers of insulating tape are tightly bonded together after folding.

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