Production process of special-shaped conductive copper foil composite assembly

Abstract

The invention relates to a production process of a special-shaped conductive copper foil composite component, the special-shaped conductive copper foil composite component is provided with a strip-shaped conductive copper foil, and first release films are respectively compounded at two ends of one surface of the strip-shaped conductive copper foil; a second release film is compounded in the middle of the other surface of the strip-shaped conductive copper foil in a region which is not overlapped with the projection regions of the two first release films; the special-shaped conductive copper foil composite assembly is manufactured by adopting a high-speed rotating die-cutting machine. By accurately controlling the step pitch of the mold and the advancing speed of the material belt, the conductive copper foil raw material is asynchronously cut into the specific width and arranged at the designated positions of the material belt at intervals, raw materials are saved, meanwhile, the contours of different L-shaped product release films located at different layers are punched at the same time in multiple times, the production technology is optimized, the product precision is improved, the defective rate is reduced, and the production efficiency is improved. And the material utilization rate is effectively improved.

Description

Technical Field

[0001] The invention relates to the technical field of die-cut components for electronic products, in particular to a production process for a special-shaped conductive copper foil composite component. Background Art

[0002] Die-cut components are widely used in electronic products or equipment. Some electronic devices need to use composite components including conductive copper foil to meet the needs of component bonding and conductivity. Due to the characteristics of the internal structure of the equipment, the shapes of these conductive copper foil composite components also have corresponding characteristics. The price of conductive copper foil is relatively expensive compared to other raw materials. It is necessary to save materials as much as possible during production to reduce costs. In some known schemes, such as back-to-back arrangement and pre-cutting of conductive copper foil strips into narrower strips, etc., raw materials are saved, but the overall processing efficiency of these methods is still low, the die design is relatively complex, and the extremely narrow conductive copper foil strips are prone to breakage, resulting in a low overall finished product qualification rate. In addition, some special-shaped conductive copper foil composite components have special shapes and high requirements for the accuracy of shape and position features. Summary of the invention

[0003] The purpose of the present invention is to overcome the above-mentioned deficiencies of the prior art and provide a production process for a special-shaped conductive copper foil composite component.

[0004] The technical scheme adopted by the present invention is: a production process of a special-shaped conductive copper foil composite component, the special-shaped conductive copper foil composite component has a strip of conductive copper foil, and first release films are respectively compounded at both ends of one side of the strip of conductive copper foil, and the inner ends of the two first release films are respectively formed with first handles protruding from one side of the strip of conductive copper foil; a second release film is compounded in the middle of the other side of the strip of conductive copper foil that does not overlap with the projection area of ​​the two first release films, and one end of the second release film is also formed with a second handle protruding from one side of the strip of conductive copper foil; the characteristic is that: the special-shaped conductive copper foil composite component is produced by a high-speed rotary die-cutting machine, and the production process thereof comprises the following steps: Step a, compounding the first release film strip on the first base film strip, performing first die-cutting by a first circular die-cutting roller group, and forming first release film inner end contour lines of two first release film inner ends in a plurality of special-shaped conductive copper foil composite components on the first release film strip, and the first release film inner end contour lines are parallel to the running direction of the strip; Step b, subjecting the conductive copper foil strip to a second die-cutting process through a second asynchronous die-cutting roller group, and arranging the formed strip-shaped conductive copper foil primary material blocks at equal intervals on a first release film strip having a first release film inner end contour line formed thereon, and the length direction of each strip-shaped conductive copper foil primary material block is perpendicular to the first release film inner end contour line and spans over two parallel first release film inner end contour lines.

[0005] Step c: After compounding a layer of process protection film tape on the composite tape, a third die-cutting is performed through a third circular knife die-cutting roller group to form a complete outline of the strip conductive copper foil and the remaining outline of the first release film. Except for the outline of the first handle portion, the remaining outline of the first release film coincides with the outline of the strip conductive copper foil; the remaining outline of the first release film and the inner end outline of the first release film formed by the first die-cutting just form a complete outline of the first release film; after the third die-cutting, waste is removed, firstly the waste outside the frame of the first release film tape and the waste outside the frame of the process protection film tape are peeled off, and then the waste of the process protection film located in the frame is removed by the waste removal tape; the main material tape formed at this time is, from bottom to top, the first base film tape, the first release film arranged at intervals on the first base film tape, and the strip conductive copper foil on the first release film, and the first release film has a first handle portion protruding from the strip conductive copper foil.

[0006] Step d: In front of the main material belt in the running direction, along the opposite direction, the second release film belt is compounded on the second base film belt, and then the fourth circular knife die-cutting roller group is used for the fourth die-cutting to form the complete contour line of the second release film, and the waste of the second release film belt outside the contour line frame is excluded, and then the second release film belt is turned over and compounded with the main material belt, so that the formed second release film is aligned and compounded to the upper surface of the strip conductive copper foil, and the second release film is located in the area between the two first release films.

[0007] Step e: peel off the second base film tape from the top and transfer it to the finished release paper tape, peel off the first base film tape from the bottom and transfer it to the finished protective film tape and the third base film tape, and then separate the finished product from the third base film tape after slitting by the fifth circular die-cutting roller group. The finished products are from bottom to top: finished protective film, first release film arranged at intervals, strip-shaped conductive copper foil, second release film and finished release paper, and multiple special-shaped conductive copper foil composite components are covered between each piece of finished protective film and finished release paper.

[0008] Further, in step a, the knife roller of the first circular die-cutting roller group has a first release film inner end contour line blade corresponding to the first release film inner end contour line, and its die-cutting depth just cuts through the first release film material strip, and the spacing between adjacent first release film inner end contour line blades is ≤1mm; and the knife roller of the first circular die-cutting roller group also has three first positioning mark line blades, that is, three first positioning mark lines are formed on the first base film material strip; In step b, the outer dimensions of the primary strip-shaped conductive copper foil block formed by asynchronous die-cutting are slightly larger than the strip-shaped conductive copper foil in the finished component, and the knife roller of the second asynchronous die-cutting roller group has an asynchronous slitting blade arranged parallel to the axial direction of the knife roller and a second positioning mark line blade corresponding to one of the first positioning mark line blades; In step c, the blade of the third circular die-cutting roller group includes a first closed blade that coincides with the complete contour line of the strip conductive copper foil, a blade corresponding to the remaining contour line of the first release film, and a third positioning mark line blade corresponding to two of the first positioning mark line blades, wherein the blade depth of the first closed blade is divided into two parts, the blade depth of the part overlapping with the contour line of the first release film is just enough to cut off the first release film strip, and the blade depth of the non-overlapping parts in the middle of the two parallel parts is just enough to cut off the primary material block of the conductive copper foil; the remaining contour line of the first release film and the inner end contour line of the first release film formed by the first die-cutting just form a complete first release film contour line; when removing waste after the third die-cutting, first peel off the waste outside the frame of the first release film strip, the waste outside the frame of the conductive copper foil, and the waste outside the frame of the process protective film strip, and then remove the waste of the process protective film located in the frame through the waste removal tape.

[0009] In step d, the knife roller of the fourth circular die-cutting roller group has a second closed blade corresponding to the contour line of the second release film and a fourth positioning mark line blade corresponding to the third of the first positioning mark line blades.

[0010] In step e, first peel off the second base film tape from the top, then compound a transition transfer film tape, then peel off the first base film tape from the bottom, and compound the finished protective film tape and the third base film tape in sequence at the bottom; then peel off the transition transfer film tape from the top, and then compound the finished release paper tape from the top, that is, transfer the formed conductive copper foil composite component between the finished release paper tape and the finished protective film tape, and then separate the finished product from the third base film tape after slitting by the fifth circular die-cutting roller group, and the finished product is from bottom to top: finished protective film, first release film arranged at intervals, strip-shaped conductive copper foil, second release film and finished release paper, and a plurality of special-shaped conductive copper foil composite components are covered between each piece of finished protective film and finished release paper; the knife roller of the fifth circular die-cutting roller group is provided with a slitting blade parallel to the axial direction of the knife roller.

[0011] The present invention adopts the above process, and through the precise control of the mold step distance and the material strip travel speed, the conductive copper foil raw material is asynchronously cut into specific widths, and the materials are arranged at intervals at specified positions of the material strip, thereby saving raw materials. At the same time, the contours of the L-shaped product release films at different levels are punched out in batches and simultaneously, thereby optimizing the production process, improving product accuracy, reducing the incidence of defects, and effectively improving material utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the exploded structure of a special-shaped conductive copper foil composite component according to an embodiment of the present invention; Figure 2 is a flow chart of the process of the present invention; Figure 3-1 , Figure 3-2 , Figure 3-3 , Figure 3-4 , Figure 3-5 They are respectively schematic diagrams of the blade deployment and die-cutting effect of the first circular die-cutting roller group, the second asynchronous die-cutting roller group, the third circular die-cutting roller group, the fourth circular die-cutting roller group, and the fifth circular die-cutting roller group used in the process of the present invention; Figure 3-6 yes Figure 3-1~Figure 3-4 Schematic diagram after die-cutting effects are superimposed; Figure 4 It is a schematic diagram of the primary block of conductive copper foil cut asynchronously in the present invention. DETAILED DESCRIPTION

[0013] The present invention discloses a production process for a special-shaped conductive copper foil composite component. Figure 1 As shown, the special-shaped conductive copper foil composite component has a strip-shaped conductive copper foil 1, and first release films 2 are respectively compounded at both ends of the lower surface of the strip-shaped conductive copper foil 1, and first handles 21 protruding from one side of the strip-shaped conductive copper foil 1 are respectively formed at the inner ends of the two first release films 2; a second release film 3 is compounded in the middle of the upper surface of the strip-shaped conductive copper foil 1 in an area that does not overlap with the projection areas of the two first release films 2, and a second handle 31 protruding from one side of the strip-shaped conductive copper foil is also formed at one end of the second release film 3. In this embodiment, the second handle 31 and the first handle 21 are located on the same side, and a finished release paper 4 and a finished protective film 5 that completely cover the component are also compounded on the upper and lower surfaces of the special-shaped conductive copper foil composite component; Combination Figure 2 , Figure 3-1 to Figure 3-6 As shown, the special-shaped conductive copper foil composite component is produced by a high-speed rotary die-cutting machine, and its production process includes the following steps: Step a, compounding the first release film strip L1 on the first base film strip T1, performing the first die-cutting by the first circular die-cutting roller group M1, forming the first release film inner end contour lines M101 of the inner ends of the two first release films 2 in a plurality of special-shaped conductive copper foil composite components on the first release film strip L1, and the first release film inner end contour lines M101 are parallel to the running direction of the strip; Step b, the conductive copper foil strip D1 is subjected to a second die-cutting, i.e. asynchronous die-cutting, by a second asynchronous die-cutting roller group M2, the conductive copper foil strip D1 is stripped and removed from the film D11 after asynchronous die-cutting, and the formed strip-shaped conductive copper foil primary material blocks 11 are arranged at equal intervals on the first release film strip L1 formed with the inner end contour line M101 of the first release film, and combined with Figure 4 As shown, the length direction of each strip-shaped conductive copper foil primary material block 11 is perpendicular to the inner end contour line M101 of the first release film and straddles two parallel inner end contour lines M101 of the first release film; Step c: After a layer of process protection film material strip G1 is laminated on the composite material strip, a third die-cutting is performed by the third circular knife die-cutting roller group M3 to form a complete strip-shaped conductive copper foil contour line M301 and a first release film remaining contour line M302. Except for the first handle portion contour line, the remaining contour lines M302 of the first release film all coincide with the strip-shaped conductive copper foil contour line M301 (i.e. Figure 3-3 The remaining contour line M302 of the first release film and the inner end contour line M101 of the first release film formed by the first die-cutting just form a complete contour line of the first release film; after the third die-cutting, the waste outside the frame of the first release film tape, the waste outside the frame of the conductive copper foil and the waste outside the frame of the process protective film tape are firstly peeled off, and then the waste of the process protective film in the frame is removed by the waste removal tape P1; at this time, the main material tape formed is, from bottom to top: the first base film tape T1, the first release film 2 arranged at intervals on the first base film tape T1, and the strip-shaped conductive copper foil 1 on the first release film 2, and the first release film 2 has a first handle portion 21 protruding from the strip-shaped conductive copper foil 1; Step d: In front of the main material belt in the running direction, along the opposite direction, the second release film belt L2 (after stripping its own film L21) is laminated on the second bottom film belt T2, and then the fourth circular knife die-cutting roller group M4 is used for the fourth die-cutting to form the complete contour line M401 of the second release film, and the waste of the second release film belt outside the contour line frame is removed, and then the lower roller of the fourth circular knife die-cutting roller group M4 is turned over and laminated with the main material belt, so that the molded second release film 3 is aligned and laminated to the upper surface of the strip-shaped conductive copper foil 1, and the second release film 3 is located in the area between the two first release films 2; Step e: first peel off the second base film strip T2 from the top, compound a transition transfer film strip G2 (peel off the self-contained film), then peel off the first base film strip T1 from the bottom, and compound the finished protective film strip B1 and the third base film strip T3 in sequence at the bottom; then peel off the transition transfer film strip G2 from the top, and then compound the finished release paper strip L3 from the top, that is, transfer the formed conductive copper foil composite component between the finished release paper strip L3 and the finished protective film strip B1, and then separate the finished product from the third base film strip after slitting by the fifth circular knife die-cutting roller group. The finished products are, from bottom to top, the finished protective film 5, the first release film 2 arranged at intervals, the strip-shaped conductive copper foil 1, the second release film 3 and the finished release paper 4, and a plurality of special-shaped conductive copper foil composite components are covered between each piece of the finished protective film 5 and the finished release paper 4; Further, in step a, the knife roller of the first circular die-cutting roller group M1 has a first release film inner end contour line blade R101 corresponding to the first release film inner end contour line M101, and its die-cutting depth just cuts through the first release film material strip L1, and the spacing between adjacent first release film inner end contour line blades R101 is ≤1mm. In this embodiment, a total of 20 groups of first release film inner end contour line blades R101 are provided; and the knife roller of the first circular die-cutting roller group M1 also has three first positioning mark line blades R102, that is, three first positioning mark lines M102 are formed on the first bottom film material strip, namely, first positioning mark line one, first positioning mark line two, and first positioning mark line three; In step b, the outer dimensions of the primary strip conductive copper foil block 11 formed by asynchronous die cutting are slightly larger than the strip conductive copper foil 1 in the finished component. The knife roller of the second asynchronous die cutting roller group M2 has an asynchronous slitting blade R201 arranged parallel to the axial direction of the knife roller, and the number of the asynchronous slitting blades is also 20, and a second positioning mark line blade R202 corresponding to one of the first positioning mark line blades is provided ( Figure 3-2 Middle 2# marking line blade); In step c, the blade of the third circular die-cutting roller group M3 includes a first closed blade R301 that coincides with the contour line M301 of the strip-shaped conductive copper foil, a first release film remaining contour line blade R302 that corresponds to the remaining contour line M302 of the first release film, and a third positioning mark line blade R303 that corresponds to the second first positioning mark line blade, wherein the blade depth of the first closed blade R301 is divided into two parts, the red part, i.e., the blade depth of the part that coincides with the contour line of the first release film, is just enough to cut off the first release film strip L1, and the blade depth of the two parallel green parts, i.e., the non-overlapping parts in the middle, is just enough to cut off the conductive copper foil primary material block 11, i.e., the blade depth of the green part is less than the blade depth of the red part; the contour line of the red part coincides with the inner end contour line M101 (i.e., the inner end contour line M101) of the first release film formed by the first die-cutting Figure 3-1 The middle magenta outline) just forms a complete outline of the first release film; when removing waste after the third die-cutting, first peel off the waste outside the frame of the first release film tape, the waste outside the frame of the conductive copper foil, and the waste outside the frame of the process protective film tape, and then remove the waste of the process protective film located in the frame through the waste removal tape P1.

[0014] In step d, the knife roller of the fourth circular die-cutting roller group M4 has a second closed blade R401 corresponding to the second release film contour line M401 and a fourth positioning mark line blade R402 corresponding to the third of the first positioning mark line blades.

[0015] In step e, a cutting blade R501 parallel to the axial direction of the cutting roller and a fifth positioning mark line blade R502 are provided on the cutting roller of the fifth circular die-cutting roller group M5.

[0016] The present invention adopts the above process, and through the precise control of the mold step distance and the material strip travel speed, the conductive copper foil raw material is asynchronously cut into specific widths, and the materials are arranged at intervals at specified positions of the material strip, thereby saving raw materials. At the same time, the contours of the L-shaped product release films at different levels are punched out in batches and simultaneously, thereby optimizing the production process, improving product accuracy, reducing the incidence of defects, and effectively improving material utilization.

[0017] The above embodiments are merely exemplary embodiments used to illustrate the principles of the present invention, but the present invention 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 the present invention, and these modifications and improvements are also considered as the protection scope of the present invention.

Claims

1. A production process for a special-shaped conductive copper foil composite component, the special-shaped conductive copper foil composite component comprises a strip of conductive copper foil, first release films are respectively compounded at both ends of one side of the strip of conductive copper foil, and first handles protruding from one side of the strip of conductive copper foil are respectively formed at the inner ends of the two first release films; a second release film is compounded in the middle of the other side of the strip of conductive copper foil in an area not overlapping with the projection areas of the two first release films, and a second handle protruding from one side of the strip of conductive copper foil is also formed at one end of the second release film; the characteristics are: The special-shaped conductive copper foil composite component is produced by a high-speed rotary die-cutting machine, and its production process includes the following steps: Step a, compounding the first release film strip on the first base film strip, performing first die-cutting by a first circular die-cutting roller group, and forming first release film inner end contour lines of two first release film inner ends in a plurality of special-shaped conductive copper foil composite components on the first release film strip, and the first release film inner end contour lines are parallel to the running direction of the strip; Step b, subjecting the conductive copper foil strip to a second die-cutting process through a second asynchronous die-cutting roller group, and arranging the formed strip-shaped conductive copper foil primary material blocks at equal intervals on a first release film strip having a first release film inner end contour line formed thereon, and the length direction of each strip-shaped conductive copper foil primary material block is perpendicular to the first release film inner end contour line and straddles two parallel first release film inner end contour lines; Step c: After compounding a layer of process protection film material strip on the composite material strip, a third die-cutting is performed by a third circular knife die-cutting roller group to form a complete outline of the strip-shaped conductive copper foil and a remaining outline of the first release film. Except for the outline of the first handle portion, the remaining outline of the first release film coincides with the outline of the strip-shaped conductive copper foil; the remaining outline of the first release film and the inner end outline of the first release film formed by the first die-cutting just form a complete outline of the first release film; after the third die-cutting, waste is removed, and the main material strip formed at this time is, from bottom to top, the first base film material strip, the first release film arranged at intervals on the first base film material strip, and the strip-shaped conductive copper foil on the first release film, and the first release film has a first handle portion protruding from the strip-shaped conductive copper foil; Step d: In front of the main material belt in the running direction, in the opposite direction, the second release film belt is laminated on the second bottom film belt, and then the fourth circular knife die-cutting roller group is used for the fourth die-cutting to form the complete contour line of the second release film, and the waste of the second release film belt outside the contour line frame is excluded, and then the second release film belt is flipped and laminated with the main material belt, so that the molded second release film is aligned and laminated to the upper surface of the strip-shaped conductive copper foil, and the second release film is located in the area between the two first release films; Step e: peel off the second base film tape from the top and transfer it to the finished release paper tape, peel off the first base film tape from the bottom and transfer it to the finished protective film tape and the third base film tape, and then separate the finished product from the third base film tape after slitting by the fifth circular die-cutting roller group. The finished products are from bottom to top: finished protective film, first release film arranged at intervals, strip-shaped conductive copper foil, second release film and finished release paper, and multiple special-shaped conductive copper foil composite components are covered between each piece of finished protective film and finished release paper.

2. The production process of the special-shaped conductive copper foil composite assembly according to claim 1, characterized in that: In step a, the knife roller of the first circular die-cutting roller group has a first release film inner end contour line blade corresponding to the first release film inner end contour line, and its die-cutting depth just cuts through the first release film material strip, and the spacing between adjacent first release film inner end contour line blades is ≤1mm; and the knife roller of the first circular die-cutting roller group also has three first positioning mark line blades, that is, three first positioning mark lines are formed on the first base film material strip.

3. The production process of the special-shaped conductive copper foil composite assembly according to claim 2, characterized in that: In step b, the outer dimensions of the primary strip conductive copper foil block formed by asynchronous die-cutting are slightly larger than those of the strip conductive copper foil in the finished component, and the knife roller of the second asynchronous die-cutting roller group has an asynchronous slitting blade arranged parallel to the axial direction of the knife roller and a second positioning mark line blade corresponding to one of the first positioning mark line blades.

4. The production process of the special-shaped conductive copper foil composite assembly according to claim 3 is characterized in that: In step c, the blade of the third circular die-cutting roller group includes a first closed blade that coincides with the complete contour line of the strip conductive copper foil, a blade corresponding to the remaining contour line of the first release film, and a third positioning mark line blade corresponding to two of the first positioning mark line blades, wherein the blade depth of the first closed blade is divided into two parts, the blade depth of the part overlapping with the contour line of the first release film is just enough to cut off the first release film strip, and the blade depth of the non-overlapping parts in the middle of the two parallel parts is just enough to cut off the primary material block of the conductive copper foil; the remaining contour line of the first release film and the inner end contour line of the first release film formed by the first die-cutting just form a complete first release film contour line; when removing waste after the third die-cutting, first peel off the waste outside the frame of the first release film strip, the waste outside the frame of the conductive copper foil, and the waste outside the frame of the process protective film strip, and then remove the waste of the process protective film located in the frame through the waste removal tape.

5. The production process of the special-shaped conductive copper foil composite assembly according to claim 4, characterized in that: In step d, the knife roller of the fourth circular die-cutting roller group has a second closed blade corresponding to the contour line of the second release film and a fourth positioning mark line blade corresponding to the third of the first positioning mark line blades.

6. The production process of the special-shaped conductive copper foil composite assembly according to claim 5, characterized in that: In step e, first peel off the second base film tape from the top, then compound a transition transfer film tape, then peel off the first base film tape from the bottom, and compound the finished protective film tape and the third base film tape in sequence at the bottom; then peel off the transition transfer film tape from the top, and then compound the finished release paper tape from the top, that is, transfer the formed conductive copper foil composite component between the finished release paper tape and the finished protective film tape, and then separate the finished product from the third base film tape after slitting by the fifth circular die-cutting roller group, and the finished product is from bottom to top: finished protective film, first release film arranged at intervals, strip-shaped conductive copper foil, second release film and finished release paper, and a plurality of special-shaped conductive copper foil composite components are covered between each piece of finished protective film and finished release paper; the knife roller of the fifth circular die-cutting roller group is provided with a slitting blade parallel to the axial direction of the knife roller.

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