Polyimide drying device

Abstract

The utility model provides a polyimide drying device, and belongs to the technical field of polyimide drying. According to the technical scheme, the device comprises a drying box, and a hot air circulation mechanism and a storage barrel are arranged in the drying box; the storage barrel is arranged on a bottom plate in the drying box, an opening is formed in the upper end of the storage barrel, a plurality of sets of partition plates are vertically arranged in the storage barrel at equal intervals, and a barrel body of the storage barrel and the partition plates are each provided with a plurality of sets of ventilation holes. The polyimide raw material drying device has the advantages that the structure is simple, operation is convenient, polyimide raw materials can be effectively dried, particularly, due to the design of the rotating storage barrel and the design of the internal partition plates, drying can be even, and the drying effect is improved.

Description

Technical Field

[0001] This utility model relates to the field of polyimide drying technology, and more particularly to a polyimide drying device. Background Technology

[0002] Polyimide refers to a class of polymers containing imide rings in their main chain, and is one of the organic polymer materials with the best overall performance. It possesses high temperature resistance and high insulation properties. Polyimide is produced by first undergoing low-temperature polycondensation of dianhydride and diamine in a polar solvent to obtain soluble polyamic acid. After film formation or spinning, the polyamic acid is heated to approximately 300°C for dehydration and cyclization, transforming it into polyimide. Alternatively, acetic anhydride and tertiary amine catalysts can be added to polyamic acid to perform chemical dehydration and cyclization, yielding polyimide solutions and powders. The resulting powders are then dried to obtain solid powder products.

[0003] Currently, most polyimide drying devices in practical use dry the raw materials inside the drying chamber by heating the bottom and side walls. This heating and drying method is not uniform enough, and the raw materials in the middle are not easily heated and dried, resulting in low overall heating and drying efficiency and poor heating effect. Therefore, this application provides a polyimide drying device. Utility Model Content

[0004] The purpose of this invention is to provide a simple and effective drying device for polyimide.

[0005] This utility model is achieved through the following measures:

[0006] A drying apparatus for polyimide, characterized in that it includes a drying chamber, wherein a hot air circulation mechanism and a storage cylinder are provided inside the drying chamber;

[0007] The storage cylinder is installed on the bottom plate inside the drying chamber. The upper end of the storage cylinder is open. Several sets of partitions are vertically arranged at equal intervals inside the storage cylinder. Several sets of ventilation holes are provided on the cylinder body and the partitions. The polyimide raw material is stored between the partitions inside the storage cylinder. The partitions separate the polyimide raw material to prevent it from piling up and causing the inside to not dry properly.

[0008] The specific features of this utility model also include:

[0009] The storage cylinder includes a bottom, a lower ring, an upper ring, and a body;

[0010] The lower ring is provided around the bottom of the cylinder. The cylinder body includes a semi-circular cylinder body one and a cylinder body two. The cylinder body one is disposed on the lower ring. The upper ring is provided at the upper end of the cylinder body one. Annular grooves are provided on the opposite sides of the upper ring and the lower ring. The cylinder body two is slidably disposed between the two annular grooves. After sliding, the cylinder body two closes with the cylinder body one to form a complete cylinder body. Specifically, the inner diameter of the cylinder body two is larger than the outer diameter of the cylinder body one, so it can slide against the cylinder body one.

[0011] One side of the partition is located on the inner wall of the cylinder body, and the other side of the partition faces the opening of the cylinder body, so that the cylinder body can be slid open to facilitate unloading.

[0012] An auxiliary plate is provided on one side wall of the first cylinder body, and a matching bolt is provided on the auxiliary plate through a threaded structure. A corresponding insertion hole is provided on the second cylinder body to cooperate with the bolt. When the second cylinder body slides with the first cylinder body to form a complete cylinder body, it is fixed by the cooperation of the bolt and the insertion hole.

[0013] The drying chamber has an opening on one side that works with the storage cylinder. An extension plate, integrally connected to the base plate, is provided below the opening. A sliding groove is provided on the base plate, extending to the extension plate. A matching sliding plate is provided in the sliding groove, and a circular groove is provided on the sliding plate. A bearing is provided in the circular groove. A round rod, fixed to the inner ring of the bearing, is provided in the middle of the lower side of the cylinder. The storage cylinder can rotate inside the drying chamber via the bearing.

[0014] The drying oven is slidably provided with a door that mates with the opening. Specifically, a crossbar is provided on the side of the drying oven above the opening, through which the door is slidably provided. A lower extension plate that mates with the sliding groove is provided on the lower side of the door.

[0015] The outer side of the extension plate is provided with a threaded structure for a lead screw that passes through the slide groove. The corresponding end of the lead screw is rotatably mounted on the side of the slide plate. The outer end of the lead screw is provided with a handle. By rotating the handle, the slide plate can be slid onto the extension plate, that is, slid to the outside of the drying chamber, which also means that the storage cylinder is slid to the outside of the drying chamber.

[0016] The lower extension plate is provided with a notch or groove that mates with the lead screw, so that the drying chamber can be closed after the chamber door is closed, which is beneficial for drying.

[0017] The upper side of the drying oven is provided with a through hole that mates with the storage cylinder. A matching disc is slidably disposed in the through hole. A motor is disposed on the upper side of the disc. The output shaft of the motor passes downward through the disc and is surrounded by a cover plate that mates with the upper end of the storage cylinder. The cover plate is used to cover the upper part of the storage cylinder. An external spline is provided in the middle of the lower side of the cover plate. A circular rod is provided in the middle of the bottom of the cylinder. An internal spline that mates with the external spline is provided on the upper end face of the circular rod. The upper end of the internal spline teeth and the lower end of the external spline teeth are both set as arc-shaped surfaces to facilitate the mutual insertion and mating of the external spline and the internal spline.

[0018] A U-shaped plate is provided on the upper side of the disc, and an L-shaped rod is provided on the upper side of the drying oven. An electric telescopic rod is provided on the L-shaped rod, and the free end of the electric telescopic rod is provided on the U-shaped plate.

[0019] The hot air circulation mechanism includes a heating chamber located on one side inside the drying chamber, a heating plate inside the heating chamber, and a fan located on the upper side of the heating chamber. The inlet of the fan is connected to the heating chamber, and the outlet of the fan is connected via a pipe to an air box fixed inside the drying chamber by a bracket. The air box has several sets of air outlets on its side facing the storage cylinder. The fan delivers hot air from the heating chamber to the air box, and then the hot air is blown towards the storage cylinder through the air outlets, thereby drying the polyimide inside.

[0020] A dehumidification box is provided on the lower part of the outer side of the drying chamber. The dehumidification box is filled with dehumidifying cotton. A collection box is provided on the other side of the drying chamber away from the heating chamber. Several sets of air inlets are provided on the outer side of the collection box. Corresponding pipes are provided on the dehumidification box to connect to the heating chamber and the collection box, thereby realizing hot air circulation. That is, the hot air in the heating chamber is transported to the drying chamber by the fan to dry the material in the storage cylinder. Then the hot air enters the collection box, then the dehumidification box, and then the heating chamber.

[0021] Working principle: In use, first open the chamber door, then rotate the handle to slide the storage cylinder out of the drying chamber. Add polyimide raw material through the upper opening of the storage cylinder, then slide the storage cylinder into the drying chamber. Next, use the electric telescopic rod to lower the disc, allowing the external spline to insert into the internal spline. At this point, the cover plate closes the upper opening of the storage cylinder. Then, activate the hot air circulation mechanism and start the motor to rotate the storage cylinder. During rotation, the internal polyimide raw material is uniformly heated and dried. After drying, open the chamber door, slide the storage cylinder out, slide open the cylinder body, and then remove the polyimide raw material.

[0022] The beneficial effects of this utility model are as follows: This device has a simple structure and is easy to operate. It can effectively dry polyimide raw materials. In particular, the design of the rotating storage cylinder and the internal partition design make the drying uniform and improve the drying effect. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model.

[0024] Figure 2 This is a partial cross-sectional structural diagram of an embodiment of the present invention.

[0025] Figure 3 This is a schematic diagram of the structure of the storage cylinder in an embodiment of this utility model.

[0026] Figure 4 for Figure 3 A magnified view of A in the middle.

[0027] Figure 5 This is a schematic diagram of the disk-related components in an embodiment of this utility model.

[0028] The attached diagram is labeled as follows: 1. Drying oven; 2. Disc; 3. Electric telescopic rod; 4. Motor; 5. Door; 6. Extension plate; 7. Slide groove; 8. Lead screw; 9. Dehumidification box; 10. Storage cylinder; 11. Air box; 12. Air outlet; 13. Fan; 14. Heating chamber; 15. Lower ring; 16. Cylinder body one; 17. Partition plate; 18. Upper ring; 19. Circular rod; 20. Internal spline; 21. Cylinder body two; 22. Bolt; 23. External spline; 24. Cover plate. Detailed Implementation

[0029] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0030] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0031] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0032] To clearly illustrate the technical features of this solution, the following detailed implementation method will be used to describe the solution.

[0033] See Figures 1-5 A drying device for polyimide includes a drying chamber 1, which is equipped with a hot air circulation mechanism and a storage cylinder 10.

[0034] The storage cylinder 10 is installed on the bottom plate inside the drying chamber 1. The upper end of the storage cylinder 10 is set as an opening. Several sets of partitions 17 are vertically arranged at equal intervals inside the storage cylinder 10. Several sets of ventilation holes are provided on the cylinder body and the partitions 17. The polyimide raw material is stored between the partitions 17 inside the storage cylinder 10. The partitions 17 separate the polyimide raw material to avoid the problem of internal drying caused by accumulation.

[0035] The storage cylinder 10 includes a bottom, a lower ring 15, an upper ring 18, and a cylinder body;

[0036] A lower ring 15 is provided around the bottom of the cylinder. The cylinder body includes a semi-circular cylinder body 16 and a cylinder body 21. The cylinder body 16 is set on the lower ring 15. An upper ring 18 is provided at the upper end of the cylinder body 16. Annular grooves are provided on the opposite sides of the upper ring 18 and the lower ring 15. The cylinder body 21 is slidably arranged between the two annular grooves. After sliding, the cylinder body 21 closes with the cylinder body 16 to form a complete cylinder body. Specifically, the inner diameter of the cylinder body 21 is larger than the outer diameter of the cylinder body 16, so it can slide against the cylinder body 16.

[0037] One side of the partition 17 is set on the inner wall of the first cylinder 16, and the other side of the partition 17 faces the opening of the first cylinder 16, so that the second cylinder 21 can be slid open to facilitate unloading.

[0038] An auxiliary plate is provided on one side wall of the first cylinder 16. The auxiliary plate is provided with a matching bolt 22 through a threaded structure. The corresponding side of the second cylinder 21 is provided with a socket hole that matches the bolt 22. When the second cylinder 21 slides with the first cylinder 16 to form a complete cylinder, it is fixed by the matching of the bolt 22 and the socket hole.

[0039] The drying chamber 1 has an opening on one side that works with the storage cylinder 10. An extension plate 6, which is integrated with the bottom plate, is provided on the lower side of the opening. A sliding groove 7 is provided on the bottom plate and extends to the extension plate 6. A matching sliding plate is provided in the sliding groove 7. A circular groove is provided on the sliding plate and a bearing is provided in the circular groove. A round rod is provided in the middle of the lower side of the cylinder and fixed to the inner ring of the bearing. The storage cylinder 10 can rotate inside the drying chamber 1 through the bearing.

[0040] The drying oven 1 is equipped with a sliding door 5 that mates with the opening. Specifically, a crossbar is provided on the side of the drying oven 1 above the opening, through which the door 5 is slidably installed. A lower extension plate that mates with the slide groove 7 is provided on the lower side of the door 5.

[0041] The outer side of the extension plate 6 is provided with a threaded structure for a screw 8 that passes through the slide groove 7. The corresponding end of the screw 8 is rotatably mounted on the side of the slide plate. A handle is provided on the outer end of the screw 8. By rotating the handle, the slide plate can be slid onto the extension plate 6, that is, slid to the outside of the drying chamber 1, which also means that the storage cylinder 10 is slid to the outside of the drying chamber 1.

[0042] The lower extension plate is provided with a notch groove that mates with the lead screw 8, so that the drying chamber 1 can be closed after the chamber door 5 is closed, which is conducive to drying.

[0043] The upper side of the drying oven 1 is provided with a through hole that mates with the storage cylinder 10. A matching disc 2 is slidably arranged in the through hole. A motor 4 is arranged on the upper side of the disc 2. The output shaft of the motor 4 passes downward through the disc 2 and is surrounded by a cover plate 24 that mates with the upper port of the storage cylinder 10. The cover plate 24 is used to cover the upper part of the storage cylinder 10. An external spline 23 is provided in the middle of the lower side of the cover plate 24. A circular rod 19 is provided in the middle of the bottom of the cylinder. An internal spline 20 that mates with the external spline 23 is provided on the upper end face of the circular rod 19. The upper end of the teeth of the internal spline 20 and the lower end of the teeth of the external spline 23 are both set as arc surfaces to facilitate the mutual insertion and mating of the external spline 23 and the internal spline 20.

[0044] A U-shaped plate is provided on the upper side of the disc 2, and an L-shaped rod is provided on the upper side of the drying oven 1. An electric telescopic rod 3 is provided on the L-shaped rod, and the free end of the electric telescopic rod 3 is provided on the U-shaped plate.

[0045] The hot air circulation mechanism includes a heating chamber 14 located on one side inside the drying chamber 1. A heating plate is installed inside the heating chamber 14. A fan 13 is installed on the upper side of the heating chamber 14. The inlet of the fan 13 is connected to the heating chamber 14. The outlet of the fan 13 is connected to an air box 11 fixed inside the drying chamber 1 by a support through a pipe. Several sets of air outlets 12 are provided on the side of the air box 11 facing the storage cylinder 10. The fan 13 delivers hot air from the heating chamber 14 to the air box 11. Then, the hot air is blown towards the storage cylinder 10 through the air outlets 12, thereby drying the polyimide inside.

[0046] A dehumidification box 9 is provided on the lower part of the outer side of the drying chamber 1. The dehumidification box 9 is filled with dehumidifying cotton. A collection box is provided on the other side of the drying chamber 1 away from the heating chamber 14. Several sets of air inlets are provided on the outer side of the collection box. Corresponding pipes are provided on the dehumidification box 9 to connect to the heating chamber 14 and the collection box, thereby realizing hot air circulation. That is, the hot air in the heating chamber 14 is transported to the drying chamber 1 by the fan 13 to dry the material in the storage cylinder 10. Then the hot air enters the collection box, then the dehumidification box, and then the heating chamber 14.

[0047] Working principle: In use, first open the chamber door 5, then turn the handle to slide the storage cylinder 10 out of the drying chamber 1. Then add polyimide raw material through the upper opening of the storage cylinder 10, and then slide the storage cylinder 10 into the drying chamber 1. Then, the electric telescopic rod 3 moves the disc 2 down, so that the outer spline 23 is inserted into the inner spline 20. At this time, the cover plate 24 just closes the upper opening of the storage cylinder 10. Then, turn on the hot air circulation mechanism and start the motor 4 to make the storage cylinder 10 rotate. During the rotation, the polyimide raw material inside can be uniformly heated and dried. After drying, open the chamber door 5, slide the storage cylinder 10 out, then slide open the cylinder body 21, and then take out the polyimide raw material.

[0048] The technical features of this utility model not described can be implemented by or by using existing technology, and will not be repeated here. Of course, the above description is not a limitation of this utility model, and this utility model is not limited to the examples above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of this utility model should also be within the protection scope of this utility model.

Claims

1. A drying apparatus for polyimide, characterized in that, It includes a drying box (1), which is equipped with a hot air circulation mechanism and a storage cylinder (10); The storage cylinder (10) is installed on the bottom plate inside the drying oven (1). The upper end of the storage cylinder (10) is set as an opening. Several sets of partitions (17) are vertically arranged at equal intervals inside the storage cylinder (10). Several sets of ventilation holes are provided on the cylinder body of the storage cylinder (10) and the partitions (17).

2. The polyimide drying apparatus according to claim 1, characterized in that, The storage cylinder (10) includes a bottom, a lower ring (15), an upper ring (18), and a cylinder body; The lower ring (15) is provided around the bottom of the cylinder. The cylinder body includes a semi-circular cylinder body one (16) and a cylinder body two (21). The cylinder body one (16) is provided on the lower ring (15). The upper ring (18) is provided at the upper end of the cylinder body one (16). The upper ring (18) and the lower ring (15) are provided with annular grooves on opposite sides. The cylinder body two (21) is slidably provided between the annular grooves on both sides. One side of the partition (17) is disposed on the inner wall of the first cylinder (16), and the other side of the partition (17) faces the opening of the first cylinder (16).

3. The polyimide drying apparatus according to claim 2, characterized in that, An auxiliary plate is provided on one side wall of the first cylinder (16), and a matching bolt (22) is provided on the auxiliary plate through a threaded structure. The second cylinder (21) is provided with a corresponding insertion hole that matches the bolt (22).

4. The apparatus for drying polyimide according to claim 2, characterized in that, The drying oven (1) has an opening on one side that works with the storage cylinder (10). An extension plate (6) is provided on the lower side of the opening and is integrated with the bottom plate. A sliding groove (7) is provided on the bottom plate and extends to the extension plate (6). A matching sliding plate is provided in the sliding groove (7). A circular groove is provided on the sliding plate and a bearing is provided in the circular groove. A round rod fixed to the inner ring of the bearing is provided in the middle of the lower side of the cylinder. The drying oven (1) is slidably provided with a door (5) that matches the opening, and a lower extension plate that matches the slide groove (7) is provided on the lower side of the door (5).

5. The apparatus for drying polyimide according to claim 4, characterized in that, The outer side of the extension plate (6) is provided with a threaded structure for a lead screw (8) that passes through the slide groove (7). The corresponding end of the lead screw (8) is rotatably disposed on the side of the slide plate, and a handle is provided on the outer end of the lead screw (8). The lower extension plate is provided with a notch or groove that cooperates with the lead screw (8).

6. The apparatus for drying polyimide according to claim 2, characterized in that, The drying oven (1) has a through hole on its upper side that mates with the storage cylinder (10). A matching disc (2) is slidably disposed in the through hole. A motor (4) is disposed on the upper side of the disc (2). The output shaft of the motor (4) passes downward through the disc (2) and is surrounded by a cover plate (24) that mates with the upper port of the storage cylinder (10). An external spline (23) is disposed in the middle of the lower side of the cover plate (24). A circular rod (19) is disposed in the middle of the bottom of the cylinder. An internal spline (20) that mates with the external spline (23) is disposed on the upper end face of the circular rod (19).

7. The apparatus for drying polyimide according to claim 6, characterized in that, A U-shaped plate is provided on the upper side of the disc (2), an L-shaped rod is provided on the upper side of the drying oven (1), an electric telescopic rod (3) is provided on the L-shaped rod, and the free end of the electric telescopic rod (3) is provided on the U-shaped plate.

8. The apparatus for drying polyimide according to claim 1, characterized in that, The hot air circulation mechanism includes a heating chamber (14) disposed on one side inside the drying chamber (1). A heating plate is disposed inside the heating chamber (14). A fan (13) is disposed on the upper side of the heating chamber (14). The inlet of the fan (13) is connected to the heating chamber (14). The outlet of the fan (13) is connected to an air box (11) fixed inside the drying chamber (1) by a bracket through a pipeline. Several sets of air outlets (12) are disposed on the side of the air box (11) facing the storage cylinder (10).

9. The apparatus for drying polyimide according to claim 8, characterized in that, A dehumidifier box (9) is provided on the lower part of the outer side of the drying box (1). A dehumidifier cotton is provided inside the dehumidifier box (9). A collection box is provided on the other side of the drying box (1) away from the heating chamber (14). Several sets of air inlets are provided on the outer side of the collection box. Corresponding pipes are provided on the dehumidifier box (9) to connect to the heating chamber (14) and the collection box.

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