Cold air box for tape casting and stretching post-treatment of polyimide film

Abstract

The utility model discloses a cold air box for polyimide film slobbering and stretching post-processing, which comprises a lower box body, a cold air box, a cold air channel, a main air cooler and an auxiliary air cooler, the lower box body is a rectangular box body with ventilation openings on the left side and the right side, the auxiliary air cooler is arranged on the inner side of the lower box body, and the cold air channel which is transversely arranged is arranged on the lower box body; the cold air channel is a rectangular channel with an opening in the top and an air inlet in the bottom, multiple sets of guide shafts used for guiding films are arranged on the inner side of the cold air channel at intervals, and rails are arranged on the two sides of the opening in the top side of the cold air channel. The cold air box is arranged in the middle of the upper side of the cold air channel and provided with a main air box, an auxiliary air box, a main air pipe, branch pipes and sprayers. The cold air box adopts the combination of the cold air box and the cold air channel, the cold air box adopts the main air box and the auxiliary air box to uniformly cool the upper part of the film, and the cold air channel supplies air into the channel by using the auxiliary air cooler, so that circulating air is always in the cold air channel, and the cooling efficiency of the film is improved.

Description

Technical Field

[0001] The utility model relates to the field of polyimide film production, in particular to a cold air box for post-processing of polyimide film after casting and stretching. Background Art

[0002] Polyimide film (PIF) is a new type of high-temperature-resistant organic polymer film. It features high modulus, low shrinkage, high strength, low water absorption, hydrolysis resistance, radiation resistance, non-toxicity, excellent insulation properties, and thermal and oxidative stability. Currently one of the most expensive film materials internationally, it is known as "golden film." It is a key insulating material for electrical appliances and a crucial material for microelectronics manufacturing and packaging.

[0003] The polyimide film casting and stretching production line generally includes a casting machine, a cold air box, a stretching machine, etc. The specific production process is that the polyamic acid film obtained by casting passes through the cold air box after the casting machine, and then enters the stretching machine for stretching. The traditional cold air box is generally a box-type structure with a guide roller inside. The film is circulated and cooled by the cold air blown by the top cold air blower. However, the cooling efficiency of this box-type cooling structure is low, and the time for the film to pass through the cold air box is poor, which affects the overall production efficiency. Based on this, the utility model proposes a cold air box for post-processing of polyimide film casting and stretching. The cold air box adopts a combination of a cold air box + a cold air channel. The cold air box uses a main air box and an auxiliary air box to evenly cool the upper part of the film, while the cold air channel uses an auxiliary cold air blower to supply air into the channel, so that the circulating air is always in the cold air channel, which improves the cooling efficiency of the film. In addition, in order to prevent the film from being contaminated by dust, the dust curtain provided by the utility model can cover the opening of the cold air channel to prevent dust erosion. The design of the dust curtain facilitates visual inspection of the cold air channel. Utility Model Content

[0004] The purpose of the utility model is to provide a cold air box for post-treatment of polyimide film after casting and stretching, so as to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a cold air box for post-processing of polyimide film casting and stretching, comprising a lower box body, a cold air box, a cold air duct, a main cold air blower and an auxiliary cold air blower, wherein the lower box body is a rectangular box body with ventilation openings on the left and right sides, the auxiliary cold air blower is installed on the inside of the lower box body, and a horizontally arranged cold air duct is installed on the lower box body; the cold air duct is a rectangular channel with an opening at the top and an air inlet at the bottom, a plurality of groups of guide shafts for guiding the film are arranged at intervals on the inside of the cold air duct, and tracks are provided on both sides of the opening on the top side of the cold air duct; the cold air box is installed in the middle of the upper side of the cold air duct, the cold air box has a main air box, an auxiliary air box, a main air duct, a branch pipe and a nozzle, wherein the auxiliary air box is connected to both sides of the main air box, and the auxiliary air box and the main air box are both covered and installed on the top of the cold air duct, and openable sealing doors are provided at the openings on both sides of the auxiliary air box.

[0006] Preferably, the output side of the auxiliary cooling fan can be connected to the air inlet of the cold air channel through an air outlet pipe.

[0007] Preferably, the track is located at the installation position from the end of the cold air channel to the auxiliary air box, and a dust curtain for covering the top opening of the cold air channel is slidably connected to the track.

[0008] Preferably, the main cooling fan is an exhaust-type cooling fan and is installed on the rear side of the cold air channel. The air inlet of the main cooling fan faces downward, and the air outlet of the main cooling fan extends into the main air box through the main air duct.

[0009] Preferably, multiple groups of branch pipes are provided and arranged on the top sides of the main wind box and the auxiliary wind box, and a nozzle for evenly distributing the wind force is provided at the end of each branch pipe.

[0010] Compared with the prior art, the beneficial effects of the present invention are:

[0011] The cold air box of the present invention adopts a combination of a cold air box + a cold air channel. The cold air box adopts a main air box and an auxiliary air box to evenly cool the upper part of the film, and the cold air channel uses an auxiliary cold air blower to supply air into the channel, so that the circulating air is always in the cold air channel, which improves the cooling efficiency of the film. In order to prevent the film from being contaminated by dust, the dust-proof curtain provided in the utility model can cover the opening of the cold air channel to avoid dust erosion, and the design of the dust-proof curtain facilitates visual inspection of the cold air channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the three-dimensional structure of the utility model Figure 1 ;

[0013] Figure 2 This is a schematic diagram of the three-dimensional structure of the utility model Figure 2 .

[0014] In the figure: 1. Lower box; 2. Cold air duct; 3. Guide shaft; 4. Dust curtain; 5. Main air box; 6. Auxiliary air box; 7. Main air duct; 8. Main cooling air blower; 9. Sealed door. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0016] In the description of the present invention, it should be noted that the terms "vertical", "up", "down", "horizontal", etc. indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0017] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0018] See also Figure 1-2 The utility model provides a technical solution: a cold air box for post-processing of polyimide film saliva stretching, comprising a lower box body 1, a cold air box, a cold air duct 2, a main cold air blower 8 and an auxiliary cold air blower (not shown in the figure), wherein the lower box body 1 is a rectangular box body with ventilation holes on the left and right sides, the auxiliary cold air blower is installed inside the lower box body 1, and the cold air duct 2 arranged horizontally is installed on the lower box body 1; the cold air duct 2 is a rectangular channel with an opening at the top and an air inlet at the bottom, and a plurality of groups of guide shafts 3 for guiding the film are arranged at intervals on the inside of the cold air duct 2, and tracks are provided on both sides of the opening on the top side of the cold air duct 2; the cold air box is installed in the middle of the upper side of the cold air duct 2, the cold air box comprises a main air box 5, an auxiliary air box 6, a main air duct 7, a branch pipe and a nozzle, wherein the auxiliary air box 6 is connected to both sides of the main air box 5, and the auxiliary air box 6 and the main air box 5 are both covered at the top of the cold air duct 2, and the openings on both sides of the auxiliary air box 6 are provided with openable sealing doors 9.

[0019] In this embodiment, the output side of the auxiliary cooling fan can be connected to the air inlet of the cold air channel 2 through an air outlet pipe.

[0020] In this embodiment, the track is located from the end of the cold air duct 2 to the installation position of the auxiliary air box 6, and a dust curtain 4 for covering the top opening of the cold air duct 2 is slidably connected in the track.

[0021] In this embodiment, the main cooling fan 8 is an exhaust type cooling fan and is installed on the rear side of the cold air duct 2. The air inlet of the main cooling fan 8 faces downward, and the air outlet of the main cooling fan 8 extends into the main air box 5 through the main air duct 7.

[0022] In this embodiment, multiple groups of branch pipes are provided and arranged on the top sides of the main wind box 5 and the auxiliary wind box 6. A nozzle for evenly distributing wind power is provided at the end of each branch pipe.

[0023] In this embodiment, the above-mentioned cold air box adopts a combination of a cold air box + a cold air channel 2. The cold air box adopts a main air box 5 and an auxiliary air box 6 to uniformly cool the upper part of the film, and the cold air channel 2 uses an auxiliary cold air blower to supply air into the channel, so that the circulating air is always in the cold air channel 2, which improves the cooling efficiency of the film. In order to prevent the film from being contaminated by dust, the dust-proof curtain 4 provided in the utility model can cover the opening of the cold air channel 2 to avoid dust erosion, and the design of the dust-proof curtain 4 facilitates the visual inspection of the cold air channel 2.

[0024] It is worth noting that the entire device is controlled by a master control button. Since the devices matched with the control button are commonly used devices and belong to existing mature technologies, their electrical connection relationships and specific circuit structures will not be described in detail here.

[0025] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A cold air box for post-treatment of polyimide film casting and stretching, characterized in that: The invention comprises a lower box body (1), a cold air box, a cold air channel (2), a main cold air blower (8) and an auxiliary cold air blower, wherein the lower box body (1) is a rectangular box body with ventilation openings on the left and right sides, an auxiliary cold air blower is installed on the inner side of the lower box body (1), and a cold air channel (2) arranged in a horizontal direction is installed on the upper side of the lower box body (1); the cold air channel (2) is a rectangular channel with an opening at the top and an air inlet at the bottom, and a plurality of groups of air inlets for guiding thin air are arranged at intervals on the inner side of the cold air channel (2). The guide shaft (3) of the membrane and the opening on the top side of the cold air channel (2) are provided with tracks on both sides; the cold air box is installed in the middle of the upper side of the cold air channel (2), and the cold air box has a main air box (5), an auxiliary air box (6), a main air duct (7), a branch pipe and a nozzle, wherein the auxiliary air box (6) is connected to both sides of the main air box (5), and the auxiliary air box (6) and the main air box (5) are both covered and installed on the top of the cold air channel (2), and the openings on both sides of the auxiliary air box (6) are provided with openable sealing doors (9).

2. A cold air box for post-treatment of polyimide film casting and stretching according to claim 1, characterized in that: The output side of the auxiliary cooling air blower can be connected to the air inlet of the cold air channel (2) through an air outlet pipe.

3. The cold air box for post-treatment of polyimide film casting and stretching according to claim 1, characterized in that: The track is located at the installation position from the end of the cold air channel (2) to the auxiliary air box (6), and a dust curtain (4) for shielding the top opening of the cold air channel (2) is slidably connected in the track.

4. The cold air box for post-treatment of polyimide film casting and stretching according to claim 1, characterized in that: The main cooling air fan (8) is an exhaust type cooling air fan and is installed on the rear side of the cooling air channel (2). The air inlet of the main cooling air fan (8) faces downward, and the air outlet of the main cooling air fan (8) extends into the main air box (5) through the main air duct (7).

5. A cold air box for post-treatment of polyimide film casting and stretching according to claim 4, characterized in that: The branch pipes are provided in multiple groups and are arranged on the top sides of the main wind box (5) and the auxiliary wind box (6). The end of each branch pipe is provided with a nozzle for evenly distributing the wind force.

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