Modularized combined polyimide film production line

Abstract

The modular combined polyimide film production line comprises a casting machine, a stripping chamber and a transverse drawing machine, and the casting machine is formed by connecting and combining casting machine box body self-subunits which can be combined; the transverse drawing machine is formed by connecting and combining transverse drawing box units which can be combined, each transverse drawing box unit is divided into a ceramic heating subunit or a hot air heating subunit, the number of the transverse drawing box units is two or more, and each transverse drawing box unit at least comprises one ceramic heating subunit and one hot air heating subunit; box bodies of the casting machine box body self-subunits and the transverse pulling box units are composed of heat preservation plate units. According to the horizontal pull box structure, the modular design is adopted, horizontal pull box structures in different forms can be freely combined, and particularly, the respective advantages and performances of the ceramic heating subunits and the hot air heating subunits can be flexibly applied to meet different film conveying requirements, so that the flexibility and convenience during production are fully improved.

Description

Technical Field

[0001] The invention relates to a polyimide film production line comprising a casting machine, a stripping chamber and a horizontal stretching machine, in particular to a modular combined polyimide film production line. Background Art

[0002] With the rapid development of the electronic information industry, the high integration, high density and high speed of electronic equipment have caused the circuit or chip to quickly accumulate heat in a very small limited space. Whether the heat can be dissipated in time has become the key to affecting the service life, operation stability and safety performance of components. Polyimide (PI) film is widely used in the electronic and electrical fields as a high-performance insulating material due to its excellent electrical properties, flame retardant properties, high temperature resistance and radiation resistance. It is unmatched by other plastic films such as nylon film, polyester film, polypropylene film and polyethylene film.

[0003] In the process of making PI film, the film needs to be more accurately temperature controlled during transportation in the horizontal pull box. In addition, according to different needs, different forms of transportation and heating conditions are sometimes required during transportation in the horizontal pull box. The existing horizontal pull box has a single structure and cannot meet the fine requirements for products.

[0004] At the same time, the prior art mostly uses steel plates or other metal plates attached with high-efficiency thermal insulation materials as the side walls of the box, which are usually set as an integrated unit. Since the steel strip casting machine equipment is large and heavy, it not only requires a larger space for installation, but also if the equipment is partially damaged, the entire side wall has to be replaced, or other costly designs have to be adopted, which is not conducive to the current market promotion and application. Summary of the invention

[0005] The main purpose of the present invention is to provide a modular combined polyimide film production line to meet the needs.

[0006] The technical means adopted by the present invention are as follows: a modular combined polyimide film production line, comprising a cast film machine, a stripping chamber and a horizontal stretching machine, the cast film machine is composed of a cast film machine case body that can be combined and connected from sub-units; the horizontal stretching machine is composed of horizontal pull box units that can be combined and connected, and the horizontal pull box unit is divided into a ceramic heating sub-unit or a hot air heating sub-unit, and the horizontal pull box unit is more than two groups, and the horizontal pull box unit includes at least one ceramic heating sub-unit and one hot air heating sub-unit; the cast film machine case body sub-unit and the horizontal pull box unit The box body is composed of an insulation board unit, and the insulation board unit includes a main support frame, and the main support frame includes an open three-dimensional support composed of a single-layer main support frame or a double-layer support frame including at least one layer of insulation layer. The two open sides are directly or indirectly connected to a single-layer sealing plate, or one side at least uses a multi-layer sealing plate with at least one layer of insulation board material, and the whole forms a hollow cavity structure, and the hollow cavity is filled with insulation material or at least one layer of insulation layer is provided.

[0007] The beneficial effects of the present invention are:

[0008] The insulation board unit for polyimide film production line is generally used on the four sides of the box of cast film machine or horizontal stretching machine, and cooperates with the upper and lower load-bearing units to form the whole box. The main load-bearing insulation board unit adopts a double-stage thermal insulation method, and fills the cavity formed by the board with insulation cotton, so that the inner and outer sides of the box wall are not in direct contact and are divided into at least two different temperature sections to prevent the internal heat from being transferred to the outside and causing the outer surface of the box to overheat. The inner and outer panels simultaneously adopt a sandwich insulation method containing an insulation layer, bipolar insulation, and better overall mechanical properties, lower cost, and faster and more convenient operation, installation and replacement.

[0009] The design of the ceramic heating subunit makes the whole equipment modular and partitioned, and is equipped with temperature measuring and temperature control devices, so that the temperature of the corresponding area can be measured more accurately, and local fine temperature adjustment can be performed according to the different temperatures, which is more conducive to the quality control of the finished film and improves the product quality and product yield. The modular design allows free combination of different forms of horizontal pull box structures, especially the flexible use of the respective advantages of the ceramic heating subunit and the hot air heating subunit to meet different film conveying requirements and fully improve the flexibility and convenience of production. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 and Figure 2 It is a schematic diagram of the overall structure of the modular combined polyimide film production line of the present invention.

[0011] Figure 3 It is a structural schematic diagram of the casting machine casing.

[0012] Figure 4 It is a schematic diagram of the structure of the hot air heating subunit Z2.

[0013] Figure 5 It is a schematic diagram of the structure of the ceramic heating subunit Z1.

[0014] Figure 6 It is a schematic diagram of the structure of the ceramic temperature control unit Z12 of the horizontal pull box which can be removed separately in the ceramic heating subunit Z1.

[0015] Figure 7 This is a schematic diagram of the structure of the heating block Z121 arranged below the ceramic temperature control unit Z12 of the horizontal pull box.

[0016] Figure 8 It is a structural schematic diagram of the main load-bearing thermal insulation unit in the present invention.

[0017] Fig. 9 yes Figure 8 Schematic diagram of the cross-sectional structure of the main load-bearing insulation unit.

[0018] Fig.10 yes Figure 8 A schematic cross-sectional structure diagram of another main load-bearing insulation unit is shown.

[0019] Fig.11 It is a schematic diagram of the insulation board structure including two insulation board units.

[0020] Fig.12 It is a schematic diagram of the structure at the junction of two insulation board units.

[0021] Fig.13 It is a structural schematic diagram of the extra-long insulation board unit.

[0022] Fig.14 for Fig.13 Schematic diagram of the structure of the internal reinforcement ribs of the extra-long insulation board unit.

[0023] Fig.15 It is the front view of the insulation board unit.

[0024] Fig.16 is along Fig.15 Cross-sectional view along the LL direction.

[0025] Fig.17 This is a side view of a side insulation board unit for a polyimide film production line.

[0026] Fig.18 yes Fig. 9 A partial enlarged schematic diagram of point C in the middle.

[0027] Fig.19 yes Fig. 9 A schematic structural diagram of another embodiment at C in FIG.

[0028] Fig. 20 It is a schematic structural diagram of the heat insulation door of the present invention. DETAILED DESCRIPTION

[0029] like Figure 1 and Figure 2 As shown, the present invention provides a modular combined polyimide film production line, which includes a casting machine 100, a stripping chamber 200 and a horizontal stretching machine 300. The casting machine 100 is composed of a casting machine box body that can be combined and connected from a sub-unit Y; the horizontal stretching machine 300 is composed of a horizontal pull box unit Z that can be combined and connected, and the horizontal pull box unit Z is divided into a ceramic heating sub-unit Z1 or a hot air heating sub-unit Z2. The horizontal pull box unit Z is more than two groups, and the horizontal pull box unit Z at least includes a ceramic heating sub-unit Z1 and a hot air heating sub-unit Z2. The combination method can be set arbitrarily according to the needs. The key to the invention is that there is at least one ceramic heating sub-unit and a hot air heating sub-unit, and they are connected head to tail, and the film is horizontally stretched through them.

[0030] like Figure 5 and Figure 6 As shown, the ceramic heating subunit Z1 is provided with a film inlet Z10 and a film outlet Z20, and the film enters from the film inlet Z10 and exits from the film outlet Z20. The ceramic heating subunit Z1 can be provided with one or more as needed, and they are arranged end to end. A plurality of individually detachable temperature control modules Z11 are provided between the film inlet Z10 and the film outlet Z20, and each temperature control module Z11 is provided with a temperature measuring device and a temperature control device, and each temperature control module Z11 is arranged in parallel according to the film travel direction. There are more than two temperature control modules Z11 here, which are designed according to the actual process. Each temperature control module Z11 is provided with a temperature measuring device and a temperature control device, so that the temperature of the corresponding area can be measured more accurately, and local fine temperature adjustment can be performed according to the different temperatures, which is more conducive to the quality control of the finished film and improves the product quality and product yield. The temperature control module Z11 is composed of a plurality of individually detachable horizontal pull box ceramic temperature control units Z12, and each horizontal pull box ceramic temperature control unit Z12 is provided with a temperature measuring device and a temperature control device. In this optimal embodiment, each temperature control module Z11 is composed of three horizontal pull box ceramic temperature control units Z12, and each horizontal pull box ceramic temperature control unit Z12 can measure and control the temperature independently, further refining the temperature adjustment function. In addition, with this modular design, when the horizontal pull box ceramic temperature control unit Z12 fails, only the horizontal pull box ceramic temperature control unit can be repaired or replaced, which significantly improves production efficiency.

[0031] In this embodiment, if Figure 7As shown, a plurality of heating blocks Z121 are arranged below the ceramic temperature control unit Z12 of the horizontal pull box. The heating blocks Z121 are generally ceramic heating blocks. The heating blocks Z121 are arranged in a matrix form. In the drawings of this embodiment, there are two columns with 10 blocks in each column. The number can be increased or decreased according to demand. Figure 4 As shown, each heating block Z121 is individually connected to a temperature control circuit Z122, and the temperature control circuit Z122 is connected to a temperature control device (not shown in the figure), so that the heating capacity of each heating block Z121 can be adjusted through the temperature control device to achieve further precise temperature control.

[0032] like Figure 3 As shown, it is a schematic diagram of the structure of the casting machine casing. Figure 4 The structure diagram of the hot air heating subunit Z2. The casting machine box body subunit (Y) and the horizontal pull box unit (Z) box body part are composed of a heat preservation board unit, and the heat preservation board unit includes a main support frame, and the main support frame includes an open three-dimensional support composed of a single-layer main support frame or a double-layer support frame including at least one layer of heat insulation layer, and the two open sides are directly or indirectly connected to a single-layer sealing plate, or at least one side uses a multi-layer sealing plate with at least one layer of heat insulation board, forming a hollow cavity structure as a whole, and the hollow cavity is filled with heat insulation material or at least one layer of heat insulation layer is provided.

[0033] See also Figures 8 to 10 , which is the main load-bearing insulation unit 1, which includes a main support frame 10, and a reserved opening 2 is provided on the main support frame 10 to facilitate the installation of auxiliary components. The main support frame 10 is a three-dimensional structure, and a hollow cavity 100 is formed inside it. The hollow cavity 100 is filled with an insulation layer 20 or other insulation structures are arranged.

[0034] See also Fig. 9 , which is an embodiment of a main support frame 10, the main support frame 10 includes an outer frame 11 and an inner frame 12, the inner and outer frames are connected by a main support connector 13, the main support connector 13 is arranged around the frame to form a hollow cavity 100, and a multi-layer insulation layer 20 can be arranged inside the hollow cavity, the insulation layer can be insulation cotton or other insulation materials, preferably aluminum silicate insulation cotton, the thermal conductivity of the insulation cotton is smaller than that of air; and, more than two sections of broken bridge structure can be formed by adding insulation boards in the hollow cavity, the insulation layer can be arranged on both sides of the insulation board, and the structural members are not in direct contact with each other, which effectively blocks the transfer of heat; in this way, better insulation effect can be achieved, and the relevant materials and processes are relatively mature, so that the manufacturing cost of this scheme is relatively low.

[0035] The hollow cavity of the main support frame 10 is provided with an internal support beam 14 to form a load-bearing frame with the main support frame. The reserved openings are provided for installing different external components. The internal support beam 14 needs to consider the overall layout and weight of these reserved external components. It can be provided on one side of the inner frame, or on one side of the outer frame, or on both sides at the same time. The internal support beam 14 is lower than the main support connector 13 in terms of the usual height, which can effectively reduce the overall weight and cost while meeting the support requirements. A support beam or support frame with the same load-bearing capacity as the main support connector 13 can also be used as needed.

[0036] The reserved opening 2 may be a plurality of air outlets / inlets, or may be used to set other external devices, and is composed of a support frame 21 or a support rod or a support plate. The reserved opening support frame 21 is provided with a reinforcement member 22 located on one side of the inner frame or / and the outer frame, and is shown as an angle iron. In order to avoid heat conduction of the reinforcement member 22 and the reserved opening support frame 21, when it is connected to the inner frame 11 or / and the outer frame, an insulation measure is provided in the middle, such as an insulation board or insulation layer 25, or an insulation gap is reserved in the middle. The reserved opening 2 is usually extended outward, and has an external connection portion 23, i.e., an outer support frame. Considering the insulation measures when extending to the outside, insulation measures are provided between the external connection portion 23 and the outer frame 11, such as an insulation layer or a coating with insulation material. In this embodiment, the main support connector 13 is a channel steel, and the internal support beam and the reserved opening reinforcement can be an I-beam, a channel steel or an angle iron. The entire main support frame 10 is a three-dimensional frame composed of these components. The main support connector 13 is arranged around the frame to form a sturdy support load-bearing mechanism.

[0037] See also Fig.10 As shown, it is another preferred embodiment of the present invention, which is embodied in that the outer frame 11 and / or the inner frame 12 are heat-insulating multi-layer structures. The outer frame 11 and / or the inner frame 12 are composed of an outer sealing plate 101, a heat insulation plate 102 and an inner sealing plate (103). The heat insulation plate 102 can be made of calcium silicate board or other heat-insulating materials. Other structures are the same as above. Figure 2 The embodiments shown are basically the same, and the reinforcing member 22 of the reserved opening support frame 21 can be directly connected to the inner side plate, and the purpose of heat insulation can be achieved without adding additional heat preservation measures.

[0038] Inventions such as Fig.11 As shown, it is an insulation board composed of insulation board units, which includes two insulation board units 1 connected to each other, and combined with Fig.12 As shown, a buffer plate 15 is provided on adjacent sides of two mutually connected heat preservation board units 1, that is, they are separated by non-metallic plates, so as to achieve a buffer function and a certain degree of heat insulation and reinforcement function.

[0039] See also Fig.13 As shown, it is a structural diagram of an extra-long insulation board unit. When extra-long materials are used, a spacing support frame 16 with the same structure as the main supporting connector 13 is provided in the middle position or the position that needs to bear weight to ensure that the whole has the strongest load-bearing effect. Fig.14 The figure shows the arrangement of the spacer support frame 16.

[0040] like Fig.15 As shown, it is a side insulation board unit, which is mainly used for the box body of a cast-film machine or a horizontal stretching machine. The side insulation board unit 3 is composed of an insulation structure, and a reserved opening 4 is provided on it for installing external equipment, or an inspection door or an observation window, etc.

[0041] like Fig.16 and Fig.17 As shown, the side insulation panel unit 3 includes a main support frame 30, which includes a first support frame 31 and a second support frame 32, with a first insulation layer 33 arranged therebetween, the first support frame 31 and the second support frame 32 are connected to form a three-dimensional bracket with open inner and outer sides, the first support frame 31 is directly or indirectly connected to an inner plate 301, and the second support frame 32 is directly or indirectly connected to an outer plate 302, forming a hollow cavity structure as a whole.

[0042] Please combine Fig.19 As shown, the first support frame 31 and the second support frame 32 can be surrounded by angle irons to form a square or rectangular frame, and the two frames are connected by one side of the angle iron, and the first heat insulation layer 33 is arranged between the two frames. The other side of the angle iron is used as a side edge connected and fixed to the inner plate 301 and the outer plate 302. At the same time, in addition to the plate surface that shields the open area, the inner plate 301 and the outer plate 302 are provided with a connecting edge that matches the side edge of the angle iron. It is better that the connecting edge has the same width as the side edge of the angle iron, which can improve the overall aesthetics of the appearance.

[0043] like Fig.18 As shown, due to Fig.19 In the embodiment, the thickness of the hollow cavity structure formed by the two angle iron frames interlocking with each other is limited, and a third support frame 34 can be added, which is connected to one side of the inner plate 301 or the outer plate 302 to expand the space of the hollow cavity. As shown in the figure, the third support frame 34 is surrounded by a longitudinal plate with a slightly bent portion on one side to form a square or rectangular frame, one side of which is connected to one side of the angle iron of the second support frame 32, and the other side is connected to the connecting edge of the outer plate 302 from the inner side of the frame through the bent portion. In order to further insulate, the surface of the third support frame 34 in contact with the outer plate 302 is provided with a second insulation layer 35. The addition of the third support frame 34 can expand the overall thickness of the side insulation unit and further increase the insulation performance.

[0044] Look again Fig.15 and Fig.17 , which reflects the overall structure of the side insulation unit, which is composed of the inner plate 301, the first support frame 31, the insulation layer 33, the second support frame 32, the third support frame 34, the insulation layer 35 and the outer plate 302 from the inside to the outside, and the insulation layer is filled inside. Fig.18 Embodiment, or adopt Fig.19 In the embodiment, a heat-insulating layer is provided in the hollow cavity, and the heat-insulating layer can be a heat-insulating material that fills the entire space, or can be a heat-insulating board that is provided in multiple layers. The side heat-insulating unit is not a load-bearing unit, and has a heat-insulating layer provided inside from the inside to the outside, and a heat-insulating layer is provided between the outer plate 302 and the frame that contacts it, so that there is a very strong heat-insulating function between the inside and the outside. Generally speaking, the inner plate 301 and / or the outer plate 302 can achieve a very good heat-insulating method by being a single-layer plate. If you want to reduce the thickness of the cavity, or pursue the ultimate heat-insulating effect, the inner plate 301 and / or the outer plate 302, including a heat-insulating multi-layer plate composed of an outer sealing plate, a heat-insulating plate and an inner sealing plate, can also be placed with multiple layers of heat-insulating plates.

[0045] Next, the main support frame 30 is provided with a reserved opening 4 for installing external equipment or installing an inspection door, etc. Fig.16 As shown, in order to ensure the heat preservation and heat insulation function of the reserved opening position, the reserved opening 4 includes a reserved opening support frame 41, and a heat insulation layer is arranged between the reserved opening support frame 41 and the outer plate 302, so as to achieve heat insulation between the reserved opening support frame 41 and the outer side. Of course, a heat insulation layer can also be arranged at the inner side plate to further enhance the heat preservation and heat insulation effect of the frame body in contact with the outside at the reserved opening position.

[0046] Please combine Fig. 20 As shown, an insulating door 5 is installed in the reserved opening, and the insulating door 5 includes a door outer peripheral plate 51, a door inner plate 51 and a door outer plate 53; the door outer peripheral plate 51 includes the plate surfaces on both sides and the upper end of the door body to form a frame, and a support plate 55 can be arranged inside, and an insulating layer 54 is arranged between the door outer peripheral plate 51 and the door inner plate 51, and / or between the door outer peripheral plate 51 and the door outer plate 53. A thermal insulation layer is arranged at the position where the insulating door 5 contacts the reserved opening 4 to block heat conduction. An observation window 6 is arranged in the insulating door 5, and the observation window 6 includes an inner frame 61 and an outer frame 62, and an insulating layer is arranged between the two. A double-layer glass window is arranged on the outer frame, and an insulating layer is arranged between the double-layer glass window and the door outer plate 53.

[0047] like Figure 3As shown, it is a structural schematic diagram of a casting machine for a polyimide film production line, including the upper and lower sides of the box body formed by the main load-bearing insulation board unit and the side of the box body formed by the side insulation unit. The insulation board unit is a hollow cavity structure formed by at least two layers of support frames and at least one layer of insulation layer arranged therebetween, and a single-layer sealing plate (side plate) is arranged on both sides of the open hollow cavity, thereby forming a thermal insulation method similar to thermal insulation of broken bridge. Insulation material is filled in the cavity or at least multiple insulation layers are arranged to achieve good thermal insulation performance of the entire cavity. The main support frame of the main load-bearing unit is made of materials with strong bearing capacity such as channel steel or I-beam, and this part does not need to be coated with insulation material, but is directly coated with the side insulation unit of the thermal insulation bipolar broken bridge insulation method, thereby achieving high performance of overall insulation.

[0048] like Figure 4 As shown, it is a structural schematic diagram of a horizontal stretching machine for a polyimide film production line. Unlike a cast film machine, the positions and numbers of the reserved openings are different, and the functions of the components installed in the reserved openings are different.

[0049] The present invention adopts modular design, modular construction, and double-stage thermal insulation, which can ensure remote production and remote assembly, high-strength thermal insulation, and convenient disassembly and installation. Different forms of horizontal pull box structures can be freely combined, especially the respective advantages of ceramic heating subunits and hot air heating subunits can be flexibly used to meet different film transportation requirements, fully improving the flexibility and convenience of production.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and description of the present invention. The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A modular combined polyimide film production line, comprising a casting machine (100), a stripping chamber (200) and a horizontal stretching machine (300), characterized in that: The tape casting machine is composed of tape casting machine housings which can be combined and connected to each other by sub-units (Y); The horizontal stretching machine is composed of horizontal stretching box units (Z) that can be combined, and the horizontal stretching box units (Z) are divided into ceramic heating subunits (Z1) or hot air heating subunits (Z2). The horizontal stretching box units (Z) are more than two groups, and the horizontal stretching box units (Z) at least include one ceramic heating subunit (Z1) and one hot air heating subunit (Z2); The casing of the cast film machine sub-unit (Y) and the horizontal pulling box unit (Z) is composed of an insulation board unit, and the insulation board unit includes a main support frame, and the main support frame includes an open three-dimensional bracket composed of a single-layer main support frame or a double-layer support frame including at least one layer of insulation layer, and the two open sides are directly or indirectly connected to a single-layer sealing plate, or at least one side adopts a multi-layer sealing plate with at least one layer of insulation board, to form a hollow cavity structure as a whole, and the hollow cavity is filled with insulation material or at least one insulation layer is provided.

2. The modular combined polyimide film production line according to claim 1, characterized in that: The ceramic heating subunit (Z1) is provided with a film inlet (Z10) and a film outlet (Z20), and a plurality of individually detachable temperature control modules (Z11) are provided between the film inlet (Z10) and the film outlet (Z20), each temperature control module (Z11) is provided with a temperature measuring device and a temperature control device, and the temperature control modules (Z11) are arranged in parallel according to the film travel direction.

3. The modular combined polyimide film production line according to claim 2, characterized in that: The temperature control module (Z11) is composed of a plurality of independently detachable transverse pull box ceramic temperature control units (Z12), and each transverse pull box ceramic temperature control unit (Z12) is provided with a temperature measuring device (Z13) and a temperature control device.

4. The modular combined polyimide film production line according to any one of claims 1 to 3, characterized in that: The box body comprises a side surface of the box body consisting of the upper and lower sides of the box body formed by the main load-bearing insulation board unit and the side insulation unit; The main load-bearing heat-insulating unit (1) comprises a main support frame (10), the main support frame (10) comprises a hollow frame formed by a main support frame (13), an outer frame (11) and an inner frame (12) are arranged on both sides of the hollow frame, the outer frame (11) and / or the inner frame (12) of the main support frame are not single-layer plates or are formed by an outer sealing plate (101), a heat insulation plate (102) and an inner sealing plate (103), and the whole forms a hollow cavity (100) structure; The side heat-insulating unit (3) comprises a first support frame (31) and a second support frame (32), a first heat-insulating layer (33) is arranged between the first support frame (31) and the second support frame (32), the first support frame (31) and the second support frame (32) are connected to form a three-dimensional support frame with an inner side and an outer side open, the first support frame (31) is directly or indirectly connected to an inner side plate (301), and the second support frame (32) is directly or indirectly connected to an outer side plate (302), so that a hollow cavity structure is formed as a whole.

5. The modular combined polyimide film production line according to claim 4, characterized in that: An internal support beam (14) is arranged in the hollow cavity (100) of the main frame, and the internal support beam (14) is arranged on one side of the inner frame (12), or on one side of the outer frame (11), or on both sides; and / or a spacing support frame (16) is arranged in the hollow cavity (100) of the main frame at intervals, so as to support the main support frame (10) at intervals.

6. The modular combined polyimide film production line according to claim 5, characterized in that: The first support frame (31) and / or the second support frame (32) are connected to at least one third support frame (34), and are connected to the inner plate (301) or the outer plate (302) through the third support frame (34) to expand the space of the hollow cavity, and a second heat insulation layer (35) is provided between the third support frame (34) and the inner plate (301) or the outer plate (302).

7. The modular combined polyimide film production line according to claim 6, characterized in that: Features: A reserved opening (2) is provided on the main load-bearing heat-insulating unit (1), the reserved opening (2) is composed of a support frame (21), the reinforcement member (22) is connected to an inner side plate (103) of an inner frame or / and an outer frame, a reinforcement member (22) is provided on one side of the reserved opening support frame (21) located at the inner frame or / and the outer frame, an external connection portion (23) extends outward from the reserved opening, and a heat-insulating layer or a heat-insulating material is provided between the external connection portion (23) and the outer frame (11); The side heat-insulating unit (3) is provided with a reserved opening (4), the reserved opening (4) comprises a reserved opening support frame (41), and a heat-insulating layer is provided between the reserved opening support frame (41) and the outer plate (302).

8. The modular combined polyimide film production line according to claim 7, characterized in that: An insulating door (5) is installed in the reserved opening, and the insulating door (5) comprises a door outer peripheral plate (51), a door inner plate (51) and a door outer plate (53); an insulating layer (54) is provided between the door outer peripheral plate (51) and the door inner plate (51), and / or between the door outer peripheral plate (51) and the door outer plate (53).

9. The modular combined polyimide film production line according to claim 8, characterized in that: An observation window (6) is arranged inside the heat-insulating door (5), and the observation window (6) comprises an inner frame (61) and an outer frame (62), and a heat-insulating layer is arranged between the inner frame and the outer frame, and a double-layer glass window is arranged on the outer frame, and a heat-insulating layer is arranged between the double-layer glass window and the door outer panel (53); a heat-insulating layer is arranged between the heat-insulating door (5) and the reserved opening (4).

10. The modular combined polyimide film production line according to claim 9, characterized in that: The main support frame (13) is a channel steel or an I-beam, and / or the internal support beam (14) and the reserved opening reinforcement (22) are an I-beam, a channel steel or an angle iron, and / or the outer plate (101) is a stainless steel plate, and / or the inner plate (103) is an iron plate or a stainless steel plate, and the insulation board is a calcium silicon board.

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