Die cutting knife die for super high tack double sided adhesive assembly
Patent Information
- Application Number
- CN202522233629.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-22
- Publication Date
- 2026-10-30
- Estimated Expiration
- 2035-10-22
AI Technical Summary
[0002]部分精密电子产品使用的双面胶粘接组件在生产时采用的是VHB双面胶（"VeryHigh Bond"的缩写，意为“超高粘性”，如聚丙烯酸酯双面泡绵胶带等），这种超高粘性双面胶组件在现有技术中通常是直接两面复合离型膜后进行模切，且采用普通单锋小角度尖刀刃，这种工艺在实际生产中，容易出现排废容易拉伸断裂、排废溢胶、移位变形、掉片等问题，造成不良率高，尤其针对小尺寸或者精密度要求高的粘接组件，出现不良品的概率甚至超过20%，严重影响了产品的合格率和增加了整体成本
本实用新型通过上述模切刀模，采用多次逐步模切方式，模切超高粘性双面胶层之前采用第一过渡膜料带先模切出支撑超高粘性双面胶边缘废料的过渡支撑料带，以便在模切后排除大部分超高粘性双面胶料带废料，解决排废时拉伸断裂的问题；再者，通过使用双锋刀刃并且增大刀锋的角度以在模切后撑开超高粘性双面胶，同时冲切前后均增加干冰冰敷降低胶层活跃性，能有效地避免胶层回粘等问题，从而使产品成品合格率由80%左右提高到95%以上，并且产品精度也可以控制在0.1mm级别。
Smart Images
Figure CN224914934U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of precision die-cutting component production technology, and specifically refers to a die-cutting die suitable for ultra-high viscosity double-sided adhesive components. Background Technology
[0002] Some precision electronic products use VHB double-sided adhesive (short for "Very High Bond," meaning "ultra-high adhesion," such as polyacrylate double-sided foam tape) for manufacturing double-sided adhesive components. In existing technology, these ultra-high adhesion double-sided adhesive components are usually die-cut after directly laminating release film on both sides, using a common single-edged, small-angle sharp blade. In actual production, this process is prone to problems such as stretching and breaking during waste removal, excess adhesive, displacement and deformation, and chip falling off, resulting in a high defect rate. Especially for small-sized or high-precision adhesive components, the probability of defective products can even exceed 20%, seriously affecting the product qualification rate and increasing the overall cost. Utility Model Content
[0003] The purpose of this invention is to overcome the above-mentioned shortcomings of the prior art and provide a die-cutting die suitable for ultra-high viscosity double-sided adhesive components.
[0004] The technical solution adopted in this utility model is: a die-cutting die suitable for ultra-high adhesion double-sided adhesive components, including a first flat die-cutting die set, a second flat die-cutting die set, and a third flat die-cutting die set, wherein: The die of the first flat die-cutting die set is provided with at least one set of non-closed contour line cutting edge and at least one set of step distance positioning hole cutting edge, and at least one set of first step distance positioning post corresponding to the step distance positioning hole cutting edge. The non-closed contour line cutting edge is provided with two notches along the stepping direction. The span of the non-closed contour line cutting edge along the stepping direction can ensure that the adjacent primary contour lines formed by each step distance are connected end to end to form two continuous primary contour lines. The die of the second flat die-cutting die set is provided with a number of closed contour line cutting edges corresponding to the number of non-closed contour line cutting edges on the die of the first flat die-cutting die set. The two ends of the closed contour line cutting edge are also provided with head and tail extension line cutting edges. The head and tail extension line cutting edges can ensure that the head and tail extension lines formed by each step are connected end to end. The die of the second flat die-cutting die set is also provided with at least one set of second step distance positioning pins corresponding to the step distance positioning holes. The die of the third flat die-cutting module has two die-cutting stations along the stepping direction. The first die-cutting station has a first partial contour line cutting edge and a set of third step distance positioning posts. The second die-cutting station has a second partial contour line cutting edge and another set of third step distance positioning posts. The two ends of the first partial contour line formed by the first partial contour line cutting edge and the second partial contour line cutting edge intersect and close at the second die-cutting station.
[0005] In the aforementioned die-cutting dies, the blades of the second flat die-cutting die set and the third flat die-cutting die set in step c are both double-edged blades, and the inner and outer angles of the double-edged blades (i.e., the angle between the blade edge and the vertical plane) are both 20°~30°. This invention employs a multi-stage die-cutting method using the aforementioned die-cutting die. Before die-cutting the ultra-high tack double-sided adhesive layer, a first transition film strip is used to die-cut a transition support strip to support the edge waste of the ultra-high tack double-sided adhesive. This allows for the removal of most of the ultra-high tack double-sided adhesive strip waste after die-cutting, solving the problem of tensile breakage during waste removal. Furthermore, by using a double-edged blade and increasing the blade angle, the ultra-high tack double-sided adhesive is stretched open after die-cutting. Simultaneously, dry ice is applied before and after die-cutting to reduce the activity of the adhesive layer, effectively preventing problems such as adhesive layer re-adhesion. As a result, the product qualification rate is increased from about 80% to over 95%, and the product precision can be controlled at the 0.1mm level. Attached Figure Description
[0006] Figure 1 This is an exploded structural diagram of an ultra-high adhesion double-sided adhesive assembly according to this utility model; Figure 2-1 This is a schematic diagram of the die-cutting effect of the first die-cutting in this utility model, namely the blade of the first flat die-cutting module; Figure 2-2 This is a schematic diagram of the composite layers in the first die-cutting process of this utility model; Figure 3-1 This is a schematic diagram of the die-cutting effect of the second die-cutting in this utility model, namely the blade of the second flat die-cutting module; Figure 3-2 This is a schematic diagram of the composite layers in the second die-cutting process of this utility model; Figure 4-1 This is a schematic diagram of the die-cutting effect of the third die-cutting in this utility model, namely the blade of the third flat die-cutting module; Figure 4-2 This is a schematic diagram of the composite layers in the third die-cutting process of this utility model; Figure 5 This is a schematic diagram showing the superimposed die-cutting effect after three die-cutting processes in this utility model; Figure 6 This is an enlarged schematic diagram of the blade angle of the die-cutting die in this utility model. Detailed Implementation
[0007] like Figure 1As shown, the present invention relates to a die-cutting die suitable for ultra-high adhesion double-sided adhesive components. The ultra-high adhesion double-sided adhesive component includes an ultra-high adhesion double-sided adhesive layer 1 and a bottom release film 2 and a top release film 3 laminated on both sides thereon. The top release film 3 has an outline that is completely overlapped with the ultra-high adhesion double-sided adhesive layer 1, and the top release film 3 is partially provided with a protruding handle portion 31. The bottom release film 2 completely covers the area where the top release film 3 is located. Combination Figures 2-1 to 5 As shown, its production process includes the following steps: like Figure 2-1 , Figure 2-2 Step a: A surface release film strip L1 and a first transition film strip G1 are sequentially laminated onto the base film strip T1. A first die-cutting process is performed using a first flat die-cutting module M1. The die of the first flat die-cutting module M1 is provided with at least one set of non-closed contour line cutting edges R101, at least one set of step-pitch positioning hole cutting edges R102, and at least one set of first step-pitch positioning posts R103 corresponding to the step-pitch positioning hole cutting edges R102. The non-closed contour line cutting edge R101 has two notches M103 along the stepping direction. The die-cutting depth of the non-closed contour line cutting edge R101 is such that it cuts through the first transition film strip G1 and partially cuts to the surface release film strip L1. Each set of non-closed contour line cutting blades R101 die-cuts two spaced primary contour lines M101 on the composite strip, slightly larger in shape than the contour line of the finished ultra-high adhesion double-sided adhesive. Each step of the adjacent primary contour lines M101 are connected end to end to form two continuous primary contour lines. The step positioning hole cutting blade R102 cuts through the three layers of composite strip to form the step positioning hole M102. Then, the first transition film waste located between the two continuous primary contour lines is removed, forming the bottom layer film strip T1, the surface release film strip L1, and the first transition film strip G1 after waste removal from bottom to top. At this time, part of the surface release film strip is exposed. like Figure 3-1 , Figure 3-2Step b: After step a, a high-adhesion double-sided adhesive tape J1 and a second transition film tape G2 are sequentially laminated on top of the first transition film tape G1. The high-adhesion double-sided adhesive tape J1 is frozen before lamination. The high-adhesion double-sided adhesive tape J1 completely covers the exposed area of the surface release film tape L1, and the remaining part is laminated on the first transition film tape G1. Then, a second die-cutting is performed by the second flat die-cutting die group M2. The die of the second flat die-cutting die group M2 is provided with a number of closed contour line blades R201 corresponding to the number of non-closed contour line blades R101 on the die of the first flat die-cutting die group M1. The die-cutting depth of the closed contour line blades R201 is to cut through the high-adhesion double-sided adhesive tape J1 and half-cut to the surface release film tape L1. Each set of closed contour line blades R201 forms two spaced-apart shapes on the composite tape, with shapes larger than the finished high-adhesion double-sided adhesive tape. The intermediate contour line M201, which is slightly smaller than the primary contour line and slightly larger than the double-sided tape contour line, has two ends of the closed contour line blade R201 with extended blades R202 to connect the intermediate contour lines M201 of adjacent pitches, thereby separating the waste outside the frame and facilitating more thorough waste removal and reducing entanglement. The die of the second flat die-cutting die group M2 is also provided with at least one set of second pitch positioning posts R203 corresponding to the pitch positioning holes M102. Then, the first transition film strip G1 is peeled off, and the waste of the ultra-high viscosity double-sided tape strip outside the intermediate contour line M201 and the waste of the second transition film strip are removed. Then, the waste inside the second transition film frame within the intermediate contour line M201 is removed through the first row of waste tape. At this time, the strips from bottom to top are: bottom film strip T1, surface release film strip L1, and ultra-high viscosity double-sided tape block with intermediate contour line M201. For example Figure 4-1 , Figure 4-2Step c: A third transition film strip G3 is laminated on top of the ultra-high viscous double-sided adhesive block of the composite strip after step b, and then a third die-cutting is performed by the third flat die-cutting module M3. The die of the third flat die-cutting module M3 has two die-cutting stations along the stepping direction. The first die-cutting station has a first partial contour line cutting edge R301 and a set of third step distance positioning posts R302. The second die-cutting station has a second partial contour line cutting edge R303 and another set of third step distance positioning posts. Column R304; the die-cutting depths of the first partial contour line blade R301 and the second partial contour line blade R302 are to cut through the surface release film material strip L1 and half-cut to the bottom support film material strip T1, respectively forming the first partial contour line M301 and the second partial contour line M302 of the surface release film in the finished component. The two ends of the first partial contour line M301 intersect with the two ends of the second partial contour line M302 to form a complete surface release film contour line. The second partial contour line M302 intersects with the intermediate contour line M201 formed in step b in the middle. That is, the first partial contour line M301, part of the second partial contour line M302, and part of the intermediate contour line M201 constitute a complete ultra-high adhesion double-sided adhesive layer contour line. The range of the ultra-high adhesion double-sided adhesive layer contour line is slightly smaller than that of the intermediate contour line M201. Then, the waste material of the third transition film material strip and the edge waste of the double-sided adhesive block are removed from the top, and then the waste adhesive is removed through the second row. The waste material of the third transition film within the outline of the ultra-high adhesion double-sided adhesive layer is removed, and then the bottom release film material is laminated. The waste material of the bottom support film material and the top release film material is removed from the bottom and transferred to the finished protective film material. This forms a four-layer composite material from top to bottom: finished protective film material, top release film 2, ultra-high adhesion double-sided adhesive layer 1, and bottom release film material. Finally, it is cut to obtain the finished product, which includes the ultra-high adhesion double-sided adhesive component and the finished protective film 4.
[0008] In the above production process, in step b, the ultra-high viscosity double-sided adhesive tape is frozen for 1.5-3 hours before lamination; dry ice is applied to the top and bottom of the laminated tape before and after the second die-cutting to maintain the state of the ultra-high viscosity double-sided adhesive tape. This can reduce the activity of the adhesive, reduce the problem of re-adhesion, facilitate die-cutting and shaping to prevent adhesive overflow, and facilitate the separation of adhesive waste during waste discharge. Combined Figure 6 As shown, in the above production process, the blades of the second flat die-cutting module M2 in step b and the third flat die-cutting module M3 in step c are both double-edged blades, and the inner and outer angles of the double-edged blades (i.e. the angle between the blade edge and the vertical plane) are both 20°~30°. Increasing the blade angle helps to open up the angle of the ultra-high viscosity double-sided adhesive, so as to achieve a better separation effect and avoid re-adhesion.
[0009] In the above production process, the second partial contour line M302 formed by the second partial contour line blade R303 in step c has a handle portion contour line M303 that protrudes from the contour line of the ultra-high viscosity double-sided adhesive layer.
[0010] This invention employs a multi-stage die-cutting process. Before die-cutting the ultra-high tack double-sided adhesive layer, a first transition film strip is used to die-cut a transition support strip to support the edge waste of the ultra-high tack double-sided adhesive. This allows for the removal of most of the ultra-high tack double-sided adhesive strip waste after die-cutting, solving the problem of tensile breakage during waste removal. Furthermore, by using a double-edged blade with an increased blade angle to expand the ultra-high tack double-sided adhesive after die-cutting, and by applying dry ice before and after die-cutting to reduce the activity of the adhesive layer, problems such as adhesive layer re-adhesion can be effectively avoided. As a result, the product qualification rate is increased from about 80% to over 95%, and the product precision can be controlled at the 0.1mm level.
[0011] The above embodiments are merely exemplary implementations used to illustrate the principles of this utility model; however, this utility model is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of this utility model, and these modifications and improvements are also considered to be within the protection scope of this utility model.
Claims
1. A die-cutting die suitable for ultra-high adhesion double-sided adhesive components, comprising a first flat die-cutting die set, a second flat die-cutting die set, and a third flat die-cutting die set, characterized in that: The die of the first flat die-cutting die set is provided with at least one set of non-closed contour line cutting edge and at least one set of step distance positioning hole cutting edge, and at least one set of first step distance positioning post corresponding to the step distance positioning hole cutting edge. The non-closed contour line cutting edge is provided with two notches along the stepping direction. The span of the non-closed contour line cutting edge along the stepping direction can ensure that the adjacent primary contour lines formed by each step distance are connected end to end to form two continuous primary contour lines. The die of the second flat die-cutting die set is provided with a number of closed contour line cutting edges corresponding to the number of non-closed contour line cutting edges on the die of the first flat die-cutting die set. The two ends of the closed contour line cutting edge are also provided with head and tail extension line cutting edges. The head and tail extension line cutting edges can ensure that the head and tail extension lines formed by each step are connected end to end. The die of the second flat die-cutting die set is also provided with at least one set of second step distance positioning pins corresponding to the step distance positioning holes. The die of the third flat die-cutting module has two die-cutting stations along the stepping direction. The first die-cutting station has a first partial contour line cutting edge and a set of third step distance positioning posts. The second die-cutting station has a second partial contour line cutting edge and another set of third step distance positioning posts. The two ends of the first partial contour line formed by the first partial contour line cutting edge and the second partial contour line cutting edge intersect and close at the second die-cutting station.
2. The die-cutting die for ultra-high tack double-sided adhesive assemblies according to claim 1, characterized in that: The blades of the second and third flat die-cutting modules are both double-edged, and the inner and outer angles of the double-edged blades, i.e., the included angles of the blade edge relative to the vertical plane, are both 20° to 30°.