High-thermal-conductivity and high-insulation polyimide film production device and process

Abstract

The invention provides a high-thermal-conductivity and high-insulation polyimide film production device and process, and belongs to the technical field of polyimide film production, the high-thermal-conductivity and high-insulation polyimide film production device comprises a supporting frame, a cutting mechanism is arranged between the upper portions of the supporting frame, a tensioning assembly is fixedly arranged at one end of the top of the supporting frame, and a driving assembly is arranged at one end of the supporting frame. According to the cutting mechanism, the first motor works to drive the two-way screw to rotate, and the slitting knives mounted on the two-way screw move oppositely or reversely under the limitation of the guide rod, so that the distance between the multiple sets of slitting knives is adjusted, and the purpose of multi-section cutting is achieved; and different slitting knife specifications and distances among multiple groups of slitting knives can be replaced, the cutting depth can be controlled by adjusting the position of the tensioning shaft and changing the distance between the film and the slitting knives, the film on the bottom layer of the slitting knives can be prevented from being adjusted through thread transmission, and the result is more accurate.

Description

Technical Field

[0001] The invention relates to the technical field of polyimide film production, and in particular to a high-thermal-conductivity and high-insulation polyimide film production device and process. Background Art

[0002] High thermal conductivity polyimide film, commonly known as golden film, is also called high temperature insulating film, high temperature insulating paper, and also known as insulating yellow paper. During the production process of high thermal conductivity polyimide film, it needs to be cut and divided into films of different areas.

[0003] After searching, in the prior art, the Chinese patent with patent announcement number CN221048516U discloses "a slitting device for the production and processing of high thermal conductivity polyimide film, a frame, a high thermal conductivity polyimide film body is arranged at the right end of the frame, a telescopic rod is arranged at the right end of the frame, a cutting block is arranged at the lower end of the telescopic rod, and a collection box is arranged at the right end of the frame; an insertion connection structure, the insertion connection mechanism is used to quickly connect the frame and the collection box, and the fixing mechanism is arranged at the lower side of the end of the frame. This invention can quickly connect the collection box to the frame through the insertion connection mechanism, so as to The invention discloses a method for producing a high thermal conductivity polyimide film by using a telescopic rod to collect debris, and then the spacing and number of the cutting blocks at the lower end of the telescopic rod can be adjusted through a sliding adjustment mechanism, and the slider can be fixed in the slide groove by turning the handle, so that the device can divide the high thermal conductivity polyimide film body into different widths and segments. However, there are still the following defects: when the film is cut, only two groups of cutting blocks are used for cutting, which is not convenient for cutting the film into multiple film blocks of different sizes. At the same time, the telescopic rod is used to control the cutting depth, which makes it difficult to control the cutting accuracy and easy to cut too deep. Therefore, a high thermal conductivity and high insulation polyimide film production device and process are proposed. Summary of the invention

[0004] The purpose of the present invention is to solve the problem that it is inconvenient to cut a film into multiple film blocks of different sizes, and the cutting depth is controlled by a telescopic rod, which makes it difficult to control the cutting accuracy and easy to cut too deep.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a high thermal conductivity and high insulation polyimide film production device, comprising a support frame, a cutting mechanism is arranged above the support frame, a tensioning assembly is fixedly arranged at one end of the top of the support frame, and a driving assembly is arranged at one end of the support frame.

[0006] The cutting mechanism includes a fixed frame, a first motor, a bidirectional screw, a guide rod, a slitting knife, an adjustment hole and an adjustment bolt. The fixed frame is arranged on two opposite sides of the support frame, the first motor is fixedly installed on the fixed frame, the bidirectional screw is arranged between the support frames, and one end is cooperated with the output end of the first motor, the two ends of the guide rod are arranged between the fixed frames on both sides, the slitting knife is installed on the bidirectional screw and the guide rod, the adjustment hole is opened on the support frame, and the adjustment bolt is installed inside the adjustment hole to determine the position of the fixed frame.

[0007] As a preferred technical solution of the present invention, the tensioning assembly includes a base, a rotating block, a tensioning shaft, a tensioning bolt and a spring. The base is in two groups and is fixedly mounted on a support frame. The rotating block is arranged on the base, the tensioning shaft is located between the rotating blocks at both ends, the tensioning bolt is arranged on the rotating block, and the spring is sleeved on the tensioning bolt and is located between the support frame and the rotating block.

[0008] As a preferred technical solution of the present invention, the driving assembly includes a driving motor, a driving shaft, a winding roller, a pulley and a transmission belt. The driving motor is fixedly mounted at one end of the support frame, the driving shaft is cooperatively arranged at the output end of the driving motor, the winding roller is rotatably installed between one end of the support frame, the pulleys are respectively arranged at the ends of the driving shaft and the winding roller, and the transmission belt is installed on the pulley.

[0009] As a preferred technical solution of the present invention, an auxiliary wheel is provided at one end of the support frame, and the auxiliary wheel is located opposite to the winding roller.

[0010] As a preferred technical solution of the present invention, the diameter of the pulley on the driving shaft is smaller than the diameter of the pulley on the winding roller, and the transmission belt adopts V-belt transmission.

[0011] As a preferred technical solution of the present invention, the bidirectional screw is located below one side of the guide rod, a certain angle is formed between the bidirectional screw and the guide rod, and the guide rod can indirectly change the angle with the bidirectional screw by changing the height of the bottom fixing frame.

[0012] As a preferred technical solution of the present invention, support feet are provided at the bottom of the support frame.

[0013] A production process of a high thermal conductivity and high insulation polyimide film, the specific steps are as follows:

[0014] Step 1: Select raw materials: select 30-40 parts by weight of biphenyltetracarboxylic anhydride, 30-40 parts by weight of 4,4′-diaminodiphenyl ether, 20-30 parts by weight of N-methyl-2-pyrrolidone, 5-6 parts by weight of nano-nitrogen silica, 2-5 parts by weight of nano-aluminum oxide, and 3-7 parts by weight of nano-silicon oxide;

[0015] Step 2: mixing biphenyltetracarboxylic acid dianhydride and 4,4′-diaminodiphenyl ether with N-methyl-2-pyrrolidone to carry out condensation polymerization to obtain a polyamic acid solution;

[0016] Step 3: adding nano nitrogen silica, nano aluminum oxide and nano silicon oxide to the polyamic acid solution to obtain a polyamic acid mixed solution;

[0017] Step 4: Casting the polyamic acid mixed solution into a film, or immersing it in an imidization reagent to perform a first imidization reaction;

[0018] Step 5: biaxially stretching the obtained polyamic acid cast film or the product of the first imidization reaction to obtain a polyimide stretched film;

[0019] Step 6: Under the condition of gradient temperature increase, the polyimide stretched film is subjected to a second imidization reaction to finally obtain a polyimide film;

[0020] Step 7: Use a high thermal conductivity and high insulation polyimide film production device to adjust the tension of the polyimide film and cut and reel it.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. Through the setting of the cutting mechanism, the first motor works to drive the bidirectional screw to rotate, and the slitting knives installed on the bidirectional screw, under the restriction of the guide rod, the slitting knives at both ends move towards or oppositely, thereby adjusting the distance between the multi-component slitting knives to achieve the purpose of multi-segment cutting, and different slitting knife specifications and the distance between multiple groups can be replaced.

[0023] 2. Through the setting of the tensioning assembly, the distance between the film and the slitting knife can be changed by adjusting the position of the tensioning shaft, so as to control the cutting depth, which can prevent the bottom film of the cutting knife from being cut. The adjustment is made through the threaded transmission, and the result is more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the present invention;

[0025] Figure 2 It is a schematic diagram of the overall structure of the present invention;

[0026] Figure 3 It is a schematic diagram of the structure of the tensioning assembly of the present invention;

[0027] Figure 4 It is a schematic diagram of the local structure of the cutting mechanism of the present invention;

[0028] Figure 5 It is a schematic diagram of the structure of the driving component of the present invention.

[0029] In the figure: 1. support frame; 2. cutting mechanism; 3. tensioning assembly; 4. driving assembly; 201. fixing frame; 202. first motor; 203. bidirectional screw; 204. guide rod; 205. slitting knife; 206. adjustment hole; 207. adjustment bolt; 301. base; 302. rotating block; 303. tensioning shaft; 304. tensioning bolt; 305. spring; 401. driving motor; 402. driving shaft; 403. winding roller; 404. pulley; 405. transmission belt; 5. auxiliary wheel; 6. supporting foot. DETAILED DESCRIPTION

[0030] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0031] like Figure 1-5 As shown, this embodiment proposes a high thermal conductivity and high insulation polyimide film production device, including a support frame 1, a cutting mechanism 2 is arranged above the support frame 1, a tensioning component 3 is fixedly arranged at one end of the top of the support frame 1, and a driving component 4 is arranged at one end of the support frame 1.

[0032] like Figure 2 and Figure 4 As shown, the cutting mechanism 2 includes a fixed frame 201, a first motor 202, a bidirectional screw 203, a guide rod 204, a slitting knife 205, an adjustment hole 206 and an adjustment bolt 207. The fixed frame 201 is arranged on two opposite sides of the support frame 1, the first motor 202 is fixedly installed on the fixed frame 201, the bidirectional screw 203 is arranged between the support frames 1, and one end is cooperated with the output end of the first motor 202, the two ends of the guide rod 204 are arranged between the fixed frames 201 on both sides, the slitting knife 205 is installed on the bidirectional screw 203 and the guide rod 204, the adjustment hole 206 is opened on the support frame 1, and the adjusting bolt 207 is installed inside the adjusting hole 206 to determine the position of the fixed frame 201. During the slitting process, the first motor 202 works, driving the bidirectional screw 203 to rotate, and driving the slitting knife 205 to move on the bidirectional screw 203 and the guide rod 204, thereby adjusting the distance between the multi-component cutters 205, so as to achieve the purpose of cutting the film by the multi-component cutter 205. At the same time, the position of the fixing frame 201 can be changed by installing the adjusting bolt 207 in the adjusting hole 206, thereby indirectly changing the distance between the slitting knife 205 and the film.

[0033] like Figure 3As shown, the tensioning assembly 3 includes a base 301, a rotating block 302, a tensioning shaft 303, a tensioning bolt 304 and a spring 305. The base 301 is provided in two groups, and the base 301 is fixedly mounted on the support frame 1. The rotating block 302 is provided on the base 301. The tensioning shaft 303 is located between the rotating blocks 302 at both ends. The tensioning bolt 304 is provided on the rotating block 302. The spring 305 is sleeved on the tensioning bolt 304 and is located between the support frame 1 and the rotating block 302. The cutting depth varies according to the thickness of the film. The film passes through the bottom of the tensioning shaft 303, and the film is tensioned downward by the tensioning wheel. The tensioning bolt 304 is rotated to change the position of the tensioning shaft 303 and the rotating block 302, thereby changing the tension of the film and changing the distance between the film and the slitting knife 205.

[0034] like Figure 5 As shown, the driving assembly 4 includes a driving motor 401, a driving shaft 402, a winding roller 403, a pulley 404 and a transmission belt 405. The driving motor 401 is fixedly mounted at one end of the support frame 1, the driving shaft 402 is matched and arranged at the output end of the driving motor 401, the winding roller 403 is rotatably mounted between one end of the support frame 1, the pulleys 404 are respectively arranged at the ends of the driving shaft 402 and the winding roller 403, and the transmission belt 405 is installed on the pulleys 404. When the driving motor 401 works, it drives the driving shaft 402 to rotate, and drives the winding roller 403 to rotate through the pulleys 404 and the transmission belt 405, so as to rewind the cut film.

[0035] like Figure 1 As shown, an auxiliary wheel 5 is provided at one end of the support frame 1, and the auxiliary wheel 5 is opposite to the winding roller 403. When the film enters the device from the outside, the auxiliary wheel 5 provides support for the film.

[0036] like Figure 5 As shown, the diameter of the pulley 404 on the drive shaft 402 is smaller than that of the pulley 404 on the winding roller 403, and the transmission belt 405 is transmitted by a V-belt. The friction between the pulley 404 and the transmission belt 405 can be increased by reducing the winding speed of the winding roller 403 and using a V-belt transmission.

[0037] like Figure 4 As shown, the bidirectional screw 203 is located below one side of the guide rod 204 , and a certain angle is formed between the bidirectional screw 203 and the guide rod 204 . The guide rod 204 can indirectly change the angle with the bidirectional screw 203 by changing the height of the bottom fixing frame 201 .

[0038] like Figure 1 As shown, the bottom of the support frame 1 is provided with support feet 6. The support area of ​​the support frame 1 is increased, making the device more stable.

[0039] A production process of a high thermal conductivity and high insulation polyimide film, the specific steps are as follows:

[0040] Step 1: Select raw materials: select 30-40 parts by weight of biphenyltetracarboxylic anhydride, 30-40 parts by weight of 4,4′-diaminodiphenyl ether, 20-30 parts by weight of N-methyl-2-pyrrolidone, 5-6 parts by weight of nano-nitrogen silica, 2-5 parts by weight of nano-aluminum oxide, and 3-7 parts by weight of nano-silicon oxide;

[0041] Step 2: mixing biphenyltetracarboxylic acid dianhydride and 4,4′-diaminodiphenyl ether with N-methyl-2-pyrrolidone to carry out condensation polymerization to obtain a polyamic acid solution;

[0042] Step 3: adding nano nitrogen silica, nano aluminum oxide and nano silicon oxide to the polyamic acid solution to obtain a polyamic acid mixed solution;

[0043] Step 4: Casting the polyamic acid mixed solution into a film, or immersing it in an imidization reagent to perform a first imidization reaction;

[0044] Step 5: biaxially stretching the obtained polyamic acid cast film or the product of the first imidization reaction to obtain a polyimide stretched film;

[0045] Step 6: Under the condition of gradient temperature increase, the polyimide stretched film is subjected to a second imidization reaction to finally obtain a polyimide film;

[0046] Step 7: Using a high thermal conductivity and high insulation polyimide film production device to adjust the tension of the polyimide film and to cut and reel the polyimide film;

[0047] Specifically, the polyimide film enters the device from the outside. According to the thickness of the film, the tensioning bolt 304 is rotated to change the position of the tensioning shaft 303 and the rotating block 302, thereby changing the tension of the film, and then changing the distance between the film and the slitting knife 205. According to different cutting widths, the first motor 202 works to drive the bidirectional screw 203 to rotate, and drives the slitting knife 205 to move on the bidirectional screw 203 and the guide rod 204, thereby adjusting the distance between the multi-component cutters 205, so as to achieve the purpose of cutting the film by the multi-component cutter 205. At the same time, the adjusting bolt 207 can be installed in the adjusting hole 206 to change the position of the fixing frame 201, and indirectly change the distance between the slitting knife 205 and the film. The driving motor 401 works to drive the driving shaft 402 to rotate, and drives the winding roller 403 to rotate through the pulley 404 and the transmission belt 405 to wind up the cut film.

[0048] All technical features in this embodiment can be freely combined according to actual needs.

[0049] The above embodiments are preferred implementation schemes of the present invention. In addition, the present invention may also be implemented in other ways. Any obvious replacement without departing from the concept of the present technical solution is within the protection scope of the present invention.

Claims

1. A high thermal conductivity and high insulation polyimide film production device, comprising a support frame (1), characterized in that: A cutting mechanism (2) is arranged above the support frame (1), a tensioning assembly (3) is fixedly arranged at one end of the top of the support frame (1), and a driving assembly (4) is arranged at one end of the support frame (1); The cutting mechanism (2) comprises a fixing frame (201), a first motor (202), a bidirectional screw rod (203), a guide rod (204), a slitting knife (205), an adjustment hole (206) and an adjustment bolt (207); the fixing frame (201) is arranged on two opposite sides of the support frame (1); the first motor (202) is fixedly mounted on the fixing frame (201); the bidirectional screw rod (203) is arranged between the support frames (1) and one end is matched to be arranged at the output end of the first motor (202); the two ends of the guide rod (204) are arranged between the fixing frames (201) on both sides; the slitting knife (205) is mounted on the bidirectional screw rod (203) and the guide rod (204); the adjustment hole (206) is opened on the support frame (1); the adjustment bolt (207) is installed inside the adjustment hole (206) to determine the position of the fixing frame (201).

2. The high thermal conductivity and high insulation polyimide film production device according to claim 1, characterized in that: The tensioning assembly (3) comprises a base (301), a rotating block (302), a tensioning shaft (303), a tensioning bolt (304) and a spring (305). The base (301) is provided in two groups, and the base (301) is fixedly mounted on the support frame (1). The rotating block (302) is provided on the base (301), the tensioning shaft (303) is located between the rotating blocks (302) at both ends, the tensioning bolt (304) is provided on the rotating block (302), and the spring (305) is sleeved on the tensioning bolt (304) and is located between the support frame (1) and the rotating block (302).

3. The high thermal conductivity and high insulation polyimide film production device according to claim 1, characterized in that: The driving assembly (4) comprises a driving motor (401), a driving shaft (402), a winding roller (403), a pulley (404) and a transmission belt (405); the driving motor (401) is fixedly mounted on one end of the support frame (1); the driving shaft (402) is cooperatively arranged at the output end of the driving motor (401); the winding roller (403) is rotatably mounted between one end of the support frame (1); the pulley (404) is respectively arranged at the end of the driving shaft (402) and the winding roller (403); and the transmission belt (405) is mounted on the pulley (404).

4. The high thermal conductivity and high insulation polyimide film production device according to claim 3, characterized in that: An auxiliary wheel (5) is provided at one end of the support frame (1), and the auxiliary wheel (5) is located opposite to the winding roller (403).

5. The high thermal conductivity and high insulation polyimide film production device according to claim 3, characterized in that: The diameter of the pulley (404) on the driving shaft (402) is smaller than the diameter of the pulley (404) on the winding roller (403), and the transmission belt (405) adopts V-belt transmission.

6. The high thermal conductivity and high insulation polyimide film production device according to claim 1, characterized in that: The bidirectional screw rod (203) is located below one side of the guide rod (204), and a certain angle is formed between the bidirectional screw rod (203) and the guide rod (204). The guide rod (204) can indirectly change the angle with the bidirectional screw rod (203) by changing the height of the bottom fixing frame (201).

7. The high thermal conductivity and high insulation polyimide film production device according to claim 1, characterized in that: The bottom of the support frame (1) is provided with a support foot (6).

8. A production process for a high thermal conductivity and high insulation polyimide film, characterized in that: The specific steps are as follows: Step 1: Select raw materials: select 30-40 parts by weight of biphenyltetracarboxylic anhydride, 30-40 parts by weight of 4,4′-diaminodiphenyl ether, 20-30 parts by weight of N-methyl-2-pyrrolidone, 5-6 parts by weight of nano-nitrogen silica, 2-5 parts by weight of nano-aluminum oxide, and 3-7 parts by weight of nano-silicon oxide; Step 2: mixing biphenyltetracarboxylic acid dianhydride and 4,4′-diaminodiphenyl ether with N-methyl-2-pyrrolidone to carry out condensation polymerization to obtain a polyamic acid solution; Step 3: adding nano nitrogen silica, nano aluminum oxide and nano silicon oxide to the polyamic acid solution to obtain a polyamic acid mixed solution; Step 4: Casting the polyamic acid mixed solution into a film, or immersing it in an imidization reagent to perform a first imidization reaction; Step 5: biaxially stretching the obtained polyamic acid cast film or the product of the first imidization reaction to obtain a polyimide stretched film; Step 6: Under the condition of gradient temperature increase, the polyimide stretched film is subjected to a second imidization reaction to finally obtain a polyimide film; Step 7: Use the high thermal conductivity and high insulation polyimide film production device described in any one of claims 1 to 7 to adjust the tension of the polyimide film and cut and rewind the polyimide film.

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