Production method of special-shaped insulating film coil stock

Abstract

The invention relates to the technical field of insulating film processing, and provides a production method of a special-shaped insulating film coil stock, which comprises the following steps: S1, manufacturing a primary material strip; s2, a middle avoiding hole is manufactured, and a second-stage material belt is obtained; s3, middle release film waste materials are taken away, and a third-stage material belt is obtained; s4, release film excess materials and middle adhesive tape waste materials are taken away, and a fourth-stage material belt is obtained; s5, vent holes are manufactured, and a fifth-stage material belt is obtained; s6, laminating a polycarbonate film to obtain a sixth-stage material belt; s7, width cutting is carried out, and a seventh-stage material belt with the set width is obtained; s8, making gaps on two sides to obtain an eight-stage material belt; s9, notch waste materials on the two sides are lifted away, and a ninth-stage material belt is obtained; and S10, rolling a finished product. The method has the advantages and beneficial effects that the production efficiency of the special-shaped insulating film is improved and the production period is shortened through a one-time forming operation mode; and the quality and the consistency of products are improved through precise design and matched use of the multiple cutting dies.

Description

Technical Field

[0001] The invention relates to the technical field of insulating film processing, and in particular to a method for producing a special-shaped insulating film coil. Background Art

[0002] Electric vehicles need to ensure their safety during driving or charging and discharging, and they must not catch fire or other phenomena. Usually, a power battery is composed of several battery modules, and the top and bottom of the modules are insulated with thin films. Usually, this film is also called an insulating film, which plays an insulating role. Under a certain voltage environment, it isolates the conductive phenomenon between the battery cell and the outside. At present, this insulating film is usually protected by polycarbonate film. Polycarbonate film has excellent temperature resistance and can be used for a long time in high or low temperature environments. It also has excellent flame retardant and electrical properties, which is very suitable for use in automotive power batteries. The rapid increase in the electric vehicle industry in recent years has also promoted the growth of power batteries. The rapid increase in demand is also facing the improvement of production efficiency, so insulating film rolls have appeared.

[0003] like Figure 1 and Figure 2 As shown, the composition structure of the special-shaped insulating film includes a first layer of polycarbonate film, a second layer of adhesive strip 21 of double-sided tape 2, and a third layer of release paper 22 of double-sided tape 2; double-sided tape 2 is formed by bonding adhesive strip 21 and release paper 22; the special-shaped insulating film roll is rolled up in a way that the double-sided tape is on the outside and the polycarbonate film is on the inside, so that the double-sided tape can be prevented from wrinkling; the polycarbonate film and the adhesive strip are not of equal area, and the rectangular part in the middle of the adhesive strip and the notch on both sides need to be removed, and the notch on both sides of the polycarbonate film also need to be removed. The special-shaped insulating film is packaged in the form of a roll.

[0004] Since there are electronic components on the surface of the battery module, when the insulating film is attached to the surface of the battery mold through the double-sided adhesive strip, the double-sided adhesive strip cannot be directly attached to the electronic components. The adhesive strip must avoid the electronic components, otherwise it is easy to interfere with the work of the electronic components. However, the insulating film is required to cover the electronic components for insulation protection. The shape structure of the notches on both sides of the adhesive strip and the notches on both sides of the polycarbonate film is to meet the requirements of assembling the insulating mold of the battery module. When using, tear off the release paper of the special-shaped insulating film, and then attach the polycarbonate film to the surface of the battery module through the adhesive strip.

[0005] The use of existing equipment such as laminating machines and die-cutting machines to produce this special-shaped insulating film has disadvantages: the raw materials for producing the insulating film are manually transported between multiple processing equipment, which makes processing difficult, has low production efficiency, unstable quality, high defective rate, and long production cycle.

[0006] Therefore, how to improve the production efficiency of special-shaped insulating films, shorten the production cycle, and improve product quality through a one-time molding operation is a technical problem that needs to be solved urgently in this field. Summary of the invention

[0007] The technical problem to be solved by the present invention is to provide a method for producing a special-shaped insulating film coil, which improves the production efficiency of the special-shaped insulating film through a one-time forming operation, shortens the production cycle, and improves the quality of the product.

[0008] The present invention is implemented as follows: a method for producing a special-shaped insulating film coil comprises the following steps:

[0009] S1, making a primary material strip: feeding the release film, the double-sided tape and the first protective film into a first laminating device, wherein the first laminating device affixes the release paper of the double-sided tape to the first protective film and the adhesive strip of the double-sided tape to the release film, thereby obtaining a primary material strip;

[0010] S2, making a middle avoidance hole: feeding the primary material strip into a first die cutting device and a second die cutting device in sequence, wherein the first die cutting device and the second die cutting device cut the release film and the adhesive strip of the double-sided tape in sequence at the middle position of the primary material strip, but do not cut the release paper of the double-sided tape and the first protective film;

[0011] The first die cutting device forms the outline of the middle odd-numbered avoidance holes on the release film and the adhesive strip of the double-sided tape, and the second die cutting device forms the outline of the middle even-numbered avoidance holes on the release film and the adhesive strip of the double-sided tape, and the middle odd-numbered avoidance holes and the middle even-numbered avoidance holes are arranged at intervals to obtain a secondary material strip;

[0012] S3, taking away the middle release film waste: sending the secondary material tape and the first sealing tape to the third die cutting device, the release film within the middle odd-numbered avoidance holes and the middle even-numbered avoidance holes is called the middle release film waste, and the release film outside the middle odd-numbered avoidance holes and the middle even-numbered avoidance holes is called the release film residual material;

[0013] The third die-cutting device makes the first sealing tape protrude and stick to the middle release film waste, and then the first sealing tape leaves the third die-cutting device and takes away the middle release film waste, but retains the release film residue to obtain a three-level tape;

[0014] S4, taking away the remaining release film and the middle rubber strip waste: the tertiary material tape, the second sealing tape and the second protective film are all sent to the second laminating device, the rubber strips within the middle odd-numbered avoidance holes and the middle even-numbered avoidance holes are called middle rubber strip waste, and the rubber strips outside the middle odd-numbered avoidance holes and the middle even-numbered avoidance holes are called rubber strip remaining materials;

[0015] The second laminating device causes the second sealing tape to be attached to the remaining release film and the middle rubber strip waste, and then the second sealing tape leaves the second laminating device and takes away the remaining release film and the middle rubber strip waste, but retains the remaining rubber strip, and the second protective film is attached to the first protective film to obtain a four-level tape;

[0016] S5, making exhaust holes: feeding the four-level material strip into a fourth cutting die device, and the fourth cutting die sequentially cuts the release paper and the first protective film at the positions of the middle odd-numbered avoidance holes and the middle even-numbered avoidance holes, but does not cut the second protective film;

[0017] The fourth die-cutting device forms the outline of the vent on the release paper and the first protective film, the first protective film inside the vent is called the first protective film waste, the first protective film outside the vent is called the first protective film remnant, the release paper inside the vent is called the release paper waste, the release paper outside the vent is called the release paper remnant, the second protective film leaves the fourth die-cutting device and takes away the first protective film waste, and at the same time the first protective film waste takes away the release paper waste, to obtain a five-level material strip;

[0018] S6, laminating polycarbonate film: sending the five-level material strip and the polycarbonate film to a third laminating device, wherein the third laminating device laminates the polycarbonate film on the adhesive strip residue to obtain a six-level material strip;

[0019] S7, width cutting: feeding the six-level material strip into a fifth die cutting device, wherein the fifth die cutting device cuts the polycarbonate film, the adhesive strip residue and the release paper residue on both sides of the six-level material strip, but does not cut the first protective film residue, to obtain a seven-level material strip of set width;

[0020] S8, making notches on both sides: feeding the seven-level material strip into a sixth cutting die device, and the sixth cutting die device cuts the polycarbonate film and the remaining adhesive strip at both sides of the seven-level material strip, but does not cut the remaining release paper;

[0021] The sixth cutting die forms the outline of the notches on both sides of the polycarbonate film and the residual rubber strip to obtain an eight-level material strip;

[0022] S9, removing the waste from the gaps on both sides: feeding the eighth-level material tape and the third sealing tape into the seventh die-cutting device, the polycarbonate film in the gaps on both sides is called polycarbonate film gap waste, and the rubber strip residue in the gaps on both sides is called rubber strip gap waste;

[0023] The seventh die-cutting device makes the third sealing tape protrude and stick to the notch waste of the polycarbonate film, then the third sealing tape leaves the seventh die-cutting device and lifts away the notch waste of the polycarbonate film, and at the same time, the notch waste of the polycarbonate film lifts away the notch waste of the tape, to obtain a nine-level material tape;

[0024] S10, rolling up the finished product: stripping off the remaining material of the first protective film from the nine-level material strip to obtain a special-shaped insulating film, and finally rolling up the special-shaped insulating film.

[0025] Furthermore, the outlines of the middle odd-numbered avoidance holes and the middle even-numbered avoidance holes are both rectangular.

[0026] Furthermore, the two side gaps are located at two side positions between the middle odd-numbered avoidance hole and the middle even-numbered avoidance hole respectively.

[0027] Furthermore, the exhaust hole is a circular hole.

[0028] Furthermore, the release film, the double-sided tape and the first protective film are firstly installed on the first unwinding shaft, the second unwinding shaft and the third unwinding shaft in a roll state, and then fed into the first laminating device;

[0029] The first sealing tape is firstly installed on the fourth unwinding shaft in a coiled state, and then fed into the third die cutting device. After leaving the third die cutting device, the first sealing tape is wound up by the first winding shaft;

[0030] The second sealing tape is firstly installed on the fifth unwinding shaft in a roll state, and then is fed into the second laminating device. After the second sealing tape leaves the second laminating device, it is rolled up by the first receiving shaft;

[0031] The second protective film is firstly installed on the sixth unwinding shaft in a roll state, and then is sent to the second laminating device. After the second protective film leaves the second laminating device, it is rolled up by the second winding shaft;

[0032] The polycarbonate film is firstly installed on the seventh unwinding shaft in a roll state, and then fed into the third laminating device;

[0033] The third sealing tape is firstly installed on the eighth unwinding shaft in a coiled state, and then fed into the seventh die cutting device. After the third sealing tape leaves the seventh die cutting device, it is wound up by the third winding shaft;

[0034] The remaining material of the first protective film is stripped off from the nine-stage material belt and then rolled up by the fourth material collection shaft;

[0035] The special-shaped insulating film is rolled up by a fifth material-receiving shaft.

[0036] Furthermore, the first cutting die device includes a cutter seat, a side plate, a die-cutting die, a die-cutting die bottom shaft, a transmission shaft, a top block and a pressure regulating mechanism, the side plate is fixedly arranged on the cutter seat, the die-cutting die and the die-cutting die bottom shaft are arranged up and down on the side plate, the transmission shaft is rotatably arranged on the side plate for providing power to the die-cutting die and the die-cutting die bottom shaft, the die-cutting die and the die-cutting die bottom shaft rotate in the same direction, the top block is connected to the side plate for lifting, and the pressure regulating mechanism is connected to the die-cutting die through the top block.

[0037] Compared with the background technology, the advantages and beneficial effects of the present invention are:

[0038] With the help of release film and corresponding cutting dies, the middle avoidance hole for avoiding electronic components is cut out in the double-sided adhesive strip; with the help of protective film and corresponding cutting dies, the exhaust hole is cut out in the release paper of the double-sided adhesive; with the help of sealing tape and corresponding cutting dies, the waste is removed. The production efficiency of special-shaped insulating film is improved and the production cycle is shortened through a one-time molding operation; the quality and consistency of the product are improved through the precise design and coordinated use of multiple cutting dies. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The present invention will be further described below in conjunction with embodiments with reference to the accompanying drawings.

[0040] Figure 1 It is a structural schematic diagram of a special-shaped insulating film in the background technology.

[0041] Figure 2 yes Figure 1 Schematic diagram of the separation of polycarbonate film, adhesive strip and release paper.

[0042] Figure 3 It is a flow chart of the production method of the special-shaped insulating film coil of the present invention.

[0043] Figure 4 It is a schematic diagram of the positions of the laminating device, the die cutting device, the unloading shaft, and the receiving shaft in the embodiment of the present invention.

[0044] Figure 5 It is a schematic structural diagram of the first cutting die device in an embodiment of the present invention.

[0045] Figure 6 Schematic diagram of the positions of the middle odd-numbered avoidance holes and the middle even-numbered avoidance holes of the release film in an embodiment of the present invention.

[0046] Figure 7 It is a schematic diagram of the third cutting die device in an embodiment of the present invention causing the first sealing tape to protrude and adhere to the middle release film waste.

[0047] Figure 8 Schematic diagram of removing the waste of the intermediate release film in an embodiment of the present invention.

[0048] Fig. 9 It is a schematic diagram of removing the remaining release film and the waste intermediate rubber strip in an embodiment of the present invention.

[0049] Fig.10 Schematic diagram of making exhaust holes in an embodiment of the present invention.

[0050] Fig.11 It is a schematic diagram of laminating polycarbonate films and then cutting them to width in an embodiment of the present invention.

[0051] Fig.12 It is a schematic diagram of making the notches on both sides in an embodiment of the present invention.

[0052] Fig.13 It is a schematic diagram of the seventh cutting die device in an embodiment of the present invention causing the third sealing tape to protrude and adhere to the notch waste of the polycarbonate film.

[0053] Fig.14 It is a schematic structural diagram of a special-shaped insulating film obtained by stripping off the remaining material of the first protective film in an embodiment of the present invention.

[0054] Fig.15 It is a schematic diagram of the third sealing tape in an embodiment of the present invention lifting the polycarbonate film notch waste and the adhesive strip notch waste.

[0055] Reference numerals: release film 1; intermediate release film waste 11; release film residue 12;

[0056] Double-sided tape 2; adhesive strip 21; middle adhesive strip waste 211; adhesive strip residue 212; adhesive strip gap waste 213; release paper 22;

[0057] A first protective film 31; a second protective film 32;

[0058] A first laminating device 41; a second laminating device 42; a third laminating device 43;

[0059] A first sealing tape 51; a second sealing tape 52; a third sealing tape 53;

[0060] The first die cutting device 61; the middle odd-numbered avoidance hole 611; the knife seat 612; the side plate 613; the die cutting die 614; the die cutting bottom shaft 615; the transmission shaft 616; the top block 617; the pressure regulating mechanism 618; the second die cutting device 62; the middle even-numbered avoidance hole 621; the third die cutting device 63; the fourth die cutting device 64; the exhaust hole 641; the fifth die cutting device 65; the width cutting line 651; the sixth die cutting device 66; the notch 661; the seventh die cutting device 67;

[0061] Polycarbonate film 7; Polycarbonate film notched waste 71;

[0062] The first unloading shaft 81; the second unloading shaft 82; the third unloading shaft 83; the fourth unloading shaft 84; the fifth unloading shaft 85; the sixth unloading shaft 86; the seventh unloading shaft 87; the eighth unloading shaft 88;

[0063] The first receiving shaft 91 ; the second receiving shaft 92 ; the third receiving shaft 93 ; the fourth receiving shaft 94 ; and the fifth receiving shaft 95 . DETAILED DESCRIPTION

[0064] The embodiment of the present invention provides a method for producing a special-shaped insulating film roll, which overcomes the shortcomings of the background technology that the raw materials for producing the insulating film are manually transported between multiple processing equipment, resulting in great processing difficulty, low production efficiency, unstable quality, high defective rate, and long production cycle; and achieves the technical effect of improving the production efficiency of the special-shaped insulating film, shortening the production cycle, and improving the quality of the product through a one-time molding operation method.

[0065] The overall idea of ​​the technical solution of the embodiment of the present invention is as follows:

[0066] A circular knife machine and a plurality of knife dies with different structures are used to produce special-shaped insulating film rolls. First, the double-sided adhesive strip is attached to the release film, and the release paper of the double-sided adhesive is attached to the first protective film. A middle avoidance hole is cut in the middle position between the release film and the adhesive strip. The first sealing tape and the waste lifting knife die are used to lift away the middle release film waste. The second sealing tape is used to lift away the remaining release film and the middle adhesive strip waste. The middle avoidance hole of the adhesive strip is used to avoid the electronic components on the surface of the battery mold; then the release paper and the first protective film are cut at the position of the middle avoidance hole of the adhesive strip. , cut out exhaust holes, the exhaust holes are used to exhaust the air in the middle avoidance hole to avoid wrinkles of the double-sided tape after winding, and use the second protective film to remove the first protective film waste and the release paper waste; finally, the adhesive strip is attached to the polycarbonate film, and the two sides of the polycarbonate film, the adhesive strip residue and the release paper residue are cut, and notches are made on both sides of the polycarbonate film and the adhesive strip residue, and the third sealing tape is used to remove the polycarbonate film notch waste and the adhesive strip notch waste, and the first protective film residue is peeled off to obtain a special-shaped insulating film, and the special-shaped insulating film is rolled up.

[0067] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0068] See also Figures 1 to 15 , a preferred embodiment of the present invention.

[0069] A method for producing a special-shaped insulating film coil comprises the following steps:

[0070] S1, making a primary material strip: feeding the release film 1, the double-sided tape 2 and the first protective film 31 into the first laminating device 41, wherein the first laminating device 41 makes the release paper 22 of the double-sided tape 2 be attached to the first protective film 31, and the adhesive strip 21 of the double-sided tape 2 be attached to the release film 1, so as to obtain a primary material strip;

[0071] S2, making a middle avoidance hole: feeding the primary material strip into the first die cutting device 61 and the second die cutting device 62 in sequence, the first die cutting device 61 and the second die cutting device 62 in sequence cut the release film 1 and the adhesive strip 21 of the double-sided tape 2 at the middle position of the primary material strip, but do not cut the release paper 22 of the double-sided tape 2 and the first protective film 31;

[0072] The first die cutting device 61 forms the outline of the middle odd-numbered avoidance holes 611 on the release film 1 and the adhesive strip 21 of the double-sided tape 2, and the second die cutting device 62 forms the outline of the middle even-numbered avoidance holes 621 on the release film 1 and the adhesive strip 21 of the double-sided tape 2. The middle odd-numbered avoidance holes 611 and the middle even-numbered avoidance holes 621 are arranged at intervals to obtain a secondary material strip;

[0073] S3, taking away the middle release film waste: sending the secondary material tape and the first sealing tape 51 to the third die cutting device 63, the release film within the middle odd-numbered avoidance holes 611 and the middle even-numbered avoidance holes 621 is called the middle release film waste 11, and the release film outside the middle odd-numbered avoidance holes 611 and the middle even-numbered avoidance holes 621 is called the release film residual material 12;

[0074] The third die-cutting device 63 makes the first sealing tape 51 protrude and stick to the intermediate release film waste 11, and then the first sealing tape 51 leaves the third die-cutting device 63 and lifts away the intermediate release film waste 11, but retains the release film residue 12, thereby obtaining a three-level tape;

[0075] S4, remove the remaining release film and the middle rubber strip waste: send the tertiary material tape, the second sealing tape 52 and the second protective film 32 to the second laminating device 42, the rubber strips within the middle odd-numbered avoidance holes 611 and the middle even-numbered avoidance holes 621 are called middle rubber strip waste 211, and the rubber strips outside the middle odd-numbered avoidance holes 611 and the middle even-numbered avoidance holes 621 are called rubber strip remaining materials 212;

[0076] The second laminating device 42 causes the second sealing tape 52 to be attached to the release film residue 12 and the intermediate rubber strip waste 211, and then the second sealing tape 52 leaves the second laminating device 42 and takes away the release film residue 12 and the intermediate rubber strip waste 211, but retains the rubber strip residue 212, and the second protective film 32 is attached to the first protective film 31 to obtain a four-level material tape;

[0077] S5, making exhaust holes: feeding the four-level material strip into the fourth cutting die device 64, the fourth cutting die sequentially cuts the release paper 22 and the first protective film 31 at the positions of the middle odd-numbered avoidance holes 611 and the middle even-numbered avoidance holes 621, but does not cut the second protective film 32;

[0078] The fourth die-cutting device 64 forms the outline of the exhaust hole 641 on the release paper 22 and the first protective film 31. The first protective film 31 inside the exhaust hole 641 is called the first protective film waste, and the first protective film 31 outside the exhaust hole 641 is called the first protective film remnant. The release paper 22 inside the exhaust hole 641 is called the release paper waste, and the release paper 22 outside the exhaust hole 641 is called the release paper remnant. The second protective film 32 leaves the fourth die-cutting device 64 and takes away the first protective film waste, and at the same time, the first protective film waste takes away the release paper waste, so as to obtain a five-level material strip;

[0079] S6, laminating polycarbonate film: the five-level material strip and the polycarbonate film 8 are sent to the third laminating device 43, and the third laminating device 43 laminates the polycarbonate film 8 on the adhesive strip residue 212 to obtain a six-level material strip;

[0080] S7, width cutting: the sixth-level material strip is fed into the fifth die cutting device 65, and the fifth die cutting device 65 cuts the polycarbonate film 8, the adhesive strip residue 212 and the release paper residue on both sides of the sixth-level material strip, but does not cut the first protective film residue, to obtain a seventh-level material strip of set width;

[0081] S8, making notches on both sides: feeding the seven-level material strip into the sixth die-cutting device 66, the sixth die-cutting device 66 cuts the polycarbonate film 8 and the adhesive strip residue 212 at both sides of the seven-level material strip, but does not cut the release paper residue;

[0082] The sixth cutting die forms the outline of the notches 661 on both sides of the polycarbonate film 8 and the rubber strip residue 212 to obtain an eight-level material strip;

[0083] S9, removing the waste from the gaps on both sides: the eighth-level material tape and the third sealing tape 53 are sent to the seventh die-cutting device 67, the polycarbonate film in the gaps 661 on both sides is called the polycarbonate film gap waste 81, and the rubber strip residue in the gaps 661 on both sides is called the rubber strip gap waste 213;

[0084] The seventh die cutting device 67 makes the third sealing tape 53 protrude and stick to the polycarbonate film notch waste 81, then the third sealing tape 53 leaves the seventh die cutting device 67 and lifts away the polycarbonate film notch waste 81, and at the same time the polycarbonate film notch waste 81 lifts away the tape notch waste 213, to obtain a nine-level material tape;

[0085] S10, rolling up the finished product: stripping off the remaining material of the first protective film from the nine-level material strip to obtain a special-shaped insulating film, and finally rolling up the special-shaped insulating film.

[0086] The beneficial effect of the above technical solution is that the middle avoidance hole for avoiding electronic components is cut out in the double-sided adhesive strip with the help of the release film and the corresponding cutting die, the exhaust hole is cut out in the release paper of the double-sided adhesive with the help of the protective film and the corresponding cutting die, and the waste is removed with the help of the sealing tape and the corresponding cutting die. The production efficiency of the special-shaped insulating film is improved and the production cycle is shortened through a one-time molding operation method; the quality and consistency of the product are improved through the precise design and coordinated use of multiple cutting dies.

[0087] The special-shaped insulating film is composed of, from top to bottom, a first layer of polycarbonate film 8, with a thickness between 0.125-0.25 mm, and an optimal thickness of 0.175 mm; a second layer of double-sided tape 2, with a thickness between 0.03-0.07 mm, and an optimal thickness of 0.05 mm; a third layer of release paper 22 of double-sided tape 2, with a thickness of generally 0.12 mm; and a winding method with the double-sided tape 2 on the outside and the polycarbonate film 8 on the inside, which can prevent the double-sided tape from wrinkling.

[0088] The protective film is a PET material with a certain viscosity, which mainly plays the role of fixing the material position. In the step of making the exhaust hole 641, the release paper waste in the exhaust hole 641 is attached to the first protective film waste, and the first protective film waste is attached to the second protective film 32, so when the second protective film 32 removes the first protective film waste, the release paper waste is also removed.

[0089] The release film 1 is a film with different PE materials on both sides, one side is a release surface and the other side is a non-release surface; after the double-sided adhesive strip 21 is attached to the release surface, the double-sided adhesive strip 21 can be torn off from the release surface; when the sealing tape is attached to the non-release surface, it is firmly attached and cannot be torn off from the non-release surface.

[0090] The sealing tape is a single-sided PET tape used for packaging cartons. The first sealing tape 51 is used to stick to and then lift away the middle release film waste 11; the second sealing tape 52 is used to stick to and then lift away the middle rubber strip waste 211 and the release film residue 12; the third sealing tape 53 is used to stick to and then lift away the polycarbonate film gap waste 81. Since the polycarbonate film gap waste 81 sticks to the rubber strip gap waste 213, and the rubber strip gap waste 213 is easy to separate from the release paper 22, when the third sealing tape 53 lifts away the polycarbonate film gap waste 81, the rubber strip gap waste 213 is also lifted away.

[0091] The first cutting die device 61, the second cutting die device 62, the third cutting die device 63, the fourth cutting die device 64, the fifth cutting die device 65, the sixth cutting die device 66, and the seventh cutting die device 67 are all circular knife machines, but the structures of the cutting dies are different. The cutting dies of the first cutting die device 61, the second cutting die device 62, the fourth cutting die device 64, the fifth cutting die device 65, and the sixth cutting die device 66 are all cutting dies; the cutting dies of the third cutting die device 63 and the seventh cutting die are all waste cutting dies.

[0092] When the primary material strip passes through the first die cutting device 61, the die cutting device 61 cuts the first middle avoidance hole in the primary material strip in sequence, then vacates the area of ​​the second middle avoidance hole, cuts the third middle avoidance hole, vacates the area of ​​the fourth middle avoidance hole, cuts the fifth middle avoidance hole, vacates the sixth middle avoidance hole, and so on. The first, third, and fifth middle avoidance holes are the middle odd-numbered avoidance holes 611.

[0093] When the primary material strip leaves the first die cutting device 61 and enters the second die cutting device 62, the die cutting device 61 cuts the second middle avoidance hole, the fourth middle avoidance hole, the sixth middle avoidance hole, and so on in the vacated area of ​​the primary material strip. The second, fourth, and sixth middle avoidance holes are the middle even-numbered avoidance holes 621.

[0094] With the cooperation of the release film 1, the first and second cutting die devices 61 and 62, and the first and second sealing tapes 51 and 52, the middle avoidance hole of the adhesive strip 21 is orderly manufactured to prevent the adhesive strip residue 212 from being contaminated and reducing its viscosity due to contact with the cutting die.

[0095] The first laminating device 41, the second laminating device 42 and the third laminating device 43 all include a bracket and an upper pressing roller and a lower pressing roller rotatably arranged on the bracket, and a material strip laminating channel is formed between the upper pressing roller and the lower pressing roller.

[0096] The first laminating device 41, the second laminating device 42 and the third laminating device 43, the first cutting die device 61, the second cutting die device 62, the third cutting die device 63, the fourth cutting die device 64, the fifth cutting die device 65, the sixth cutting die device 66 and the seventh cutting die device 67 are all installed on the production frame.

[0097] The outlines of the middle odd-numbered avoidance holes 611 and the middle even-numbered avoidance holes 621 are both rectangular. The specifications of the rectangles are determined by the surface components of the actual battery module.

[0098] The two side gaps 661 are located at two side positions respectively between the middle odd-numbered avoidance holes 611 and the middle even-numbered avoidance holes 621. The specifications of the two side gaps 661 are determined by the assembly structure of the actual battery module.

[0099] The exhaust holes 641 are circular holes, and there are three exhaust holes 641 .

[0100] The release film 1, the double-sided tape 2 and the first protective film 31 are firstly installed in a roll state on the first unwinding shaft 81, the second unwinding shaft 82 and the third unwinding shaft 83 respectively, and then sent into the first laminating device 41;

[0101] The first sealing tape 51 is firstly installed on the fourth unwinding shaft 84 in a coiled state, and then fed into the third die cutting device 63. After leaving the third die cutting device 63, the first sealing tape 51 is wound up by the first winding shaft 91.

[0102] The second sealing tape 52 is firstly installed on the fifth unwinding shaft 85 in a roll state, and then is sent to the second laminating device 42. After leaving the second laminating device 42, the second sealing tape 52 is rolled up by the first receiving shaft 91.

[0103] The second protective film 32 is firstly installed on the sixth unwinding shaft 86 in a roll state, and then sent to the second laminating device 42. After leaving the second laminating device 42, the second protective film 32 is rolled up by the second winding shaft 92.

[0104] The polycarbonate film 8 is firstly installed on the seventh unwinding shaft 87 in a roll state, and then sent into the third laminating device 43;

[0105] The third sealing tape 53 is firstly installed on the eighth unwinding shaft 88 in a coiled state, and then fed into the seventh die cutting device 67. After leaving the seventh die cutting device 67, the third sealing tape 53 is wound up by the third winding shaft 93.

[0106] The remaining first protective film is stripped from the nine-stage material belt and then rolled up by the fourth material collection shaft 94;

[0107] The special-shaped insulating film is rolled up by the fifth take-up shaft 95 .

[0108] The beneficial effect of this technical solution is that the production materials of the special-shaped insulating film are fed in the form of coils, which can achieve uninterrupted production of the special-shaped insulating film and increase the number of meters of the special-shaped insulating film that can be rolled up.

[0109] The first cutting die device 61 includes a cutter seat 612, a side plate 613, a die-cutting die 614, a die-cutting die bottom shaft 615, a transmission shaft 616, a top block 617 and a pressure regulating mechanism 618. The side plate 613 is fixedly arranged on the cutter seat 612. The die-cutting die 614 and the die-cutting die bottom shaft 615 are arranged up and down on the side plate 613. The transmission shaft 616 is rotatably arranged on the side plate 613 for providing power to the die-cutting die 614 and the die-cutting die bottom shaft 615. The rotation directions of the die-cutting die 614 and the die-cutting die bottom shaft 615 are the same. The top block 617 is connected to the side plate 613 in a lifting manner. The pressure regulating mechanism 618 is connected to the die-cutting die 614 through the top block 617.

[0110] The beneficial effect of this technical solution is that the tape of the special-shaped insulating film passes through the die-cutting die 614 and the die bottom shaft 615, and the height of the die-cutting die 614 is adjusted by the pressure adjustment mechanism 618 according to the structure of the actual product, which is convenient and flexible to operate. The knife seat 612 supports and fixes the knife, is used to drive the rotary motion of the knife die, and has the function of adjusting and controlling the position, angle and speed of the knife die.

[0111] The processing principle of the present invention is as follows: first, the adhesive strip 21 of the double-sided tape 2 is cut, and the middle rectangular part is cut out, while the release paper 22 of the double-sided tape 2 is not cut off and retained, and the cut middle adhesive strip waste 211 is taken away by using the first sealing tape 51 and the second sealing tape 52; then three small circular holes for exhaust are cut out on the release paper 22 of the double-sided tape 2; then the polycarbonate film 8 is attached to the adhesive strip 21 for bonding; trimming and cutting to the corresponding width size; then, the polycarbonate film 8 and the adhesive strip 21 are cut out with notches 661 on both sides, but the release paper 22 is not cut with the notches 661 on both sides; the polycarbonate film notch waste 81 and the adhesive strip notch waste 213 located at the notches 661 on both sides are taken away by the third sealing tape; finally, the finished product of the special-shaped insulating film is obtained, and the finished product is rolled up.

[0112] The cutting die of the first cutting die device 61 and the cutting die of the second cutting die device 62 are both used to cut the middle avoidance hole of the double-sided adhesive strip 21. First, the release film 1 is attached to the surface of the double-sided tape 21 of the adhesive strip, and then the middle avoidance hole is cut out of the adhesive strip 21. Then, the cutting die of the third cutting die device 63 is used in conjunction with the first sealing tape 51 to remove the middle adhesive strip waste 211. The cutting die of the fourth cutting die device 64 is used to cut the circular exhaust hole 641 of the release paper 22. Because there is no double-sided tape strip 21 in the middle part of the insulation, air will remain inside. It is necessary to add several small circular holes on the release paper 22 to remove the air, so that no wrinkles will occur after winding. The cutting die of the fifth cutting die device 65 is used to cut the width size of the finished special-shaped insulating film to obtain the width cutting line 651. The cutting die of the sixth cutting die device 66 is used to cut out the gaps 661 on both sides, cutting the adhesive strip 21 and the polycarbonate film 8 of the double-sided tape 2, but not cutting the release paper 22 of the double-sided tape 2. The cutting die of the seventh cutting die device 67 is a waste lifting cutting die, which cooperates with the third sealing tape 53 to lift away the adhesive strip gap waste 213 and the polycarbonate film gap waste 81 at the positions of the gaps 661 on both sides.

[0113] Although the specific implementation modes of the present invention are described above, those skilled in the art should understand that the specific implementation modes described are only illustrative and are not intended to limit the scope of the present invention. Equivalent modifications and changes made by those skilled in the art in accordance with the spirit of the present invention should be included in the scope of protection of the claims of the present invention.

Claims

1. A method for producing a special-shaped insulating film coil, characterized in that: The following steps are involved: S1, making a primary material strip: feeding the release film, the double-sided tape and the first protective film into a first laminating device, wherein the first laminating device affixes the release paper of the double-sided tape to the first protective film and the adhesive strip of the double-sided tape to the release film, thereby obtaining a primary material strip; S2, making a middle avoidance hole: feeding the primary material strip into a first die cutting device and a second die cutting device in sequence, wherein the first die cutting device and the second die cutting device cut the release film and the adhesive strip of the double-sided tape in sequence at the middle position of the primary material strip, but do not cut the release paper of the double-sided tape and the first protective film; The first die cutting device forms the outline of the middle odd-numbered avoidance holes on the release film and the adhesive strip of the double-sided tape, and the second die cutting device forms the outline of the middle even-numbered avoidance holes on the release film and the adhesive strip of the double-sided tape, and the middle odd-numbered avoidance holes and the middle even-numbered avoidance holes are arranged at intervals to obtain a secondary material strip; S3, taking away the middle release film waste: sending the secondary material tape and the first sealing tape to the third die cutting device, the release film within the middle odd-numbered avoidance holes and the middle even-numbered avoidance holes is called the middle release film waste, and the release film outside the middle odd-numbered avoidance holes and the middle even-numbered avoidance holes is called the release film residual material; The third die-cutting device makes the first sealing tape protrude and stick to the middle release film waste, and then the first sealing tape leaves the third die-cutting device and takes away the middle release film waste, but retains the release film residue to obtain a three-level tape; S4, taking away the remaining release film and the middle rubber strip waste: the tertiary material tape, the second sealing tape and the second protective film are all sent to the second laminating device, the rubber strips within the middle odd-numbered avoidance holes and the middle even-numbered avoidance holes are called middle rubber strip waste, and the rubber strips outside the middle odd-numbered avoidance holes and the middle even-numbered avoidance holes are called rubber strip remaining materials; The second laminating device causes the second sealing tape to be attached to the remaining release film and the middle rubber strip waste, and then the second sealing tape leaves the second laminating device and takes away the remaining release film and the middle rubber strip waste, but retains the remaining rubber strip, and the second protective film is attached to the first protective film to obtain a four-level tape; S5, making exhaust holes: feeding the four-level material strip into a fourth cutting die device, and the fourth cutting die sequentially cuts the release paper and the first protective film at the positions of the middle odd-numbered avoidance holes and the middle even-numbered avoidance holes, but does not cut the second protective film; The fourth die-cutting device forms the outline of the vent on the release paper and the first protective film, the first protective film inside the vent is called the first protective film waste, the first protective film outside the vent is called the first protective film remnant, the release paper inside the vent is called the release paper waste, the release paper outside the vent is called the release paper remnant, the second protective film leaves the fourth die-cutting device and takes away the first protective film waste, and at the same time the first protective film waste takes away the release paper waste, to obtain a five-level material strip; S6, laminating polycarbonate film: sending the five-level material strip and the polycarbonate film to a third laminating device, wherein the third laminating device laminates the polycarbonate film on the adhesive strip residue to obtain a six-level material strip; S7, width cutting: feeding the six-level material strip into a fifth die cutting device, wherein the fifth die cutting device cuts the polycarbonate film, the adhesive strip residue and the release paper residue on both sides of the six-level material strip, but does not cut the first protective film residue, to obtain a seven-level material strip of set width; S8, making notches on both sides: feeding the seven-level material strip into a sixth cutting die device, and the sixth cutting die device cuts the polycarbonate film and the remaining adhesive strip at both sides of the seven-level material strip, but does not cut the remaining release paper; The sixth cutting die forms the outline of the notches on both sides of the polycarbonate film and the residual rubber strip to obtain an eight-level material strip; S9, removing the waste from the gaps on both sides: feeding the eighth-level material tape and the third sealing tape into the seventh die-cutting device, the polycarbonate film in the gaps on both sides is called polycarbonate film gap waste, and the rubber strip residue in the gaps on both sides is called rubber strip gap waste; The seventh die-cutting device makes the third sealing tape protrude and stick to the notch waste of the polycarbonate film, then the third sealing tape leaves the seventh die-cutting device and lifts away the notch waste of the polycarbonate film, and at the same time, the notch waste of the polycarbonate film lifts away the notch waste of the tape, to obtain a nine-level material tape; S10, rolling up the finished product: stripping off the remaining material of the first protective film from the nine-level material strip to obtain a special-shaped insulating film, and finally rolling up the special-shaped insulating film.

2. The method for producing a special-shaped insulating film coil according to claim 1, characterized in that: The outlines of the middle odd-numbered avoidance holes and the middle even-numbered avoidance holes are both rectangular.

3. The method for producing a special-shaped insulating film coil according to claim 1, characterized in that: The two side gaps are respectively located at two side positions between the middle odd-numbered avoidance holes and the middle even-numbered avoidance holes.

4. The method for producing a special-shaped insulating film coil according to claim 1, characterized in that: The exhaust hole is a circular hole.

5. The method for producing a special-shaped insulating film coil according to claim 1, characterized in that: The release film, the double-sided tape and the first protective film are firstly installed on the first unwinding shaft, the second unwinding shaft and the third unwinding shaft in a roll state, and then fed into the first laminating device; The first sealing tape is firstly installed on the fourth unwinding shaft in a coiled state, and then fed into the third die cutting device. After leaving the third die cutting device, the first sealing tape is wound up by the first winding shaft; The second sealing tape is firstly installed on the fifth unwinding shaft in a roll state, and then is fed into the second laminating device. After the second sealing tape leaves the second laminating device, it is rolled up by the first receiving shaft; The second protective film is firstly installed on the sixth unwinding shaft in a roll state, and then is sent to the second laminating device. After the second protective film leaves the second laminating device, it is rolled up by the second winding shaft; The polycarbonate film is firstly installed on the seventh unwinding shaft in a roll state, and then fed into the third laminating device; The third sealing tape is firstly installed on the eighth unwinding shaft in a coiled state, and then fed into the seventh die cutting device. After the third sealing tape leaves the seventh die cutting device, it is wound up by the third winding shaft; The remaining material of the first protective film is stripped off from the nine-stage material belt and then rolled up by the fourth material collection shaft; The special-shaped insulating film is rolled up by a fifth material-receiving shaft.

6. The method for producing a special-shaped insulating film coil according to claim 1, characterized in that: The first cutting die device includes a cutter seat, a side plate, a die-cutting die, a die-cutting die bottom shaft, a transmission shaft, a top block and a pressure regulating mechanism. The side plate is fixedly arranged on the cutter seat, the die-cutting die and the die-cutting die bottom shaft are arranged up and down on the side plate, the transmission shaft is rotatably arranged on the side plate, and is used to provide power to the die-cutting die and the die-cutting die bottom shaft. The die-cutting die and the die-cutting die bottom shaft rotate in the same direction, the top block is connected to the side plate for lifting, and the pressure regulating mechanism is connected to the die-cutting die through the top block.

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