High-temperature pressure maintaining tool for bonding polyimide film

Abstract

The utility model provides a high-temperature pressure maintaining tool for bonding polyimide films, and belongs to the technical field of magnetic product processing. According to the utility model, the base body is provided with the plurality of first spacing grooves and the first concave cavity, the gland with the second concave cavity is detachably mounted on the base body, the second concave cavity is provided with the plurality of second spacing grooves, and the cavity openings of the first concave cavity and the second concave cavity are oppositely arranged to form the pressure maintaining cavity; in addition, a pressure maintaining rod with one end extending into the pressure maintaining cavity is arranged at one end of the base body or the pressing cover and abuts against a magnet and a polyimide film which are placed in the pressure maintaining cavity, and the requirement for high-temperature hot melting bonding is met. The first interval groove and the second interval groove provide accommodating space for the exceeding size of the polyimide film, accumulation is avoided, an operator can conveniently adjust the placed polyimide film in the later period, the problem of uneven accumulation is prevented, the structure is simple, operation is convenient, and the product quality is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of magnetic product processing, in particular to a high-temperature pressure-maintaining tool for bonding polyimide films. Background Art

[0002] Many magnets of a certain length on the market are usually formed by bonding several small magnetic blocks along one direction, which can improve the utilization rate of magnetic materials and reduce manufacturing costs.

[0003] At present, there are two solutions for bonding small magnetic blocks on the market, one is to use liquid glue for bonding, and the other is to use solid adhesive film for hot melting to achieve bonding. When using the first method of liquid glue bonding, first apply the liquid glue to the surface of the small magnetic block to be bonded manually, then bond it face to face with another small magnetic block, and then press it with a heavy object for a predetermined time, and then take it out after the liquid glue dries. The second method uses solid adhesive film hot melt bonding. Polyimide film is used as a commonly used adhesive in magnetic materials. During processing, first lay the solid adhesive film between the two small magnetic blocks, then melt the solid adhesive film at high temperature, and also press it with a heavy object for a predetermined time, and then take it out after the glue solidifies. However, in both of the above methods, predetermined small magnetic blocks are placed in a mold with a certain depth of cavity and coated with liquid glue or solid film. When pressed by heavy objects later, the liquid glue will overflow, causing the small magnetic blocks to stick to the mold, making it difficult to remove the product. In addition, the application of liquid glue is prone to uneven application, which not only affects the bonding strength, but also causes the insulation between two adjacent small magnetic blocks to be unguaranteed. Although the solid film can solve the insulation problem very well, and in order to ensure that there is a solid film between adjacent small magnetic blocks, the size of the solid film should be slightly larger than the size of the small magnetic block. However, when the solid film is laid between the small magnetic blocks, the solid film below the small magnetic block will be blocked by the small magnetic block above after the small magnetic block is placed, and it is difficult to adjust the state of the solid film. It is easy for some of the placed solid films to stack, resulting in unevenness between two adjacent small magnetic blocks, affecting the quality of the entire product. Summary of the invention

[0004] In view of the above-mentioned problems existing in the prior art, the present invention aims to provide a high-temperature pressure-maintaining tool for bonding polyimide film, so as to set a split mold including a base body and a pressure cover, and a first cavity and a second cavity are respectively provided on opposite sides of the base body and the pressure cover, and when the base body and the pressure cover are connected, the first cavity and the second cavity form a pressure-maintaining cavity. In addition, a spacing groove is provided on the cavity side wall and the cavity bottom of the first cavity and the second cavity, so that when the magnetic block to be bonded is placed in the pressure-maintaining cavity, the spacing groove can be located between two adjacent magnetic blocks, so that the polyimide film located between the two adjacent magnetic blocks can be located in the spacing groove, and the excess part of the polyimide film can be accommodated by the spacing groove. At the same time, the polyimide film can also be adjusted by the spacing groove, which effectively avoids the problem of uneven paving of the polyimide film. It is not only simple in structure and convenient in operation, but also can ensure the quality of the processed products.

[0005] The specific technical solutions are as follows:

[0006] A high temperature pressure holding tool for bonding polyimide film, having the following characteristics:

[0007] The base body has a first concave cavity in the middle of the upper part of the base body, and a plurality of first spacing grooves are arranged on the bottom of the first concave cavity in parallel and at intervals, and both ends of each first spacing groove pass through the two side surfaces of the base body;

[0008] A gland, which is arranged above the base body and is detachably connected to the base body. A second concave cavity is provided on one side of the gland close to the base body. Meanwhile, a plurality of second spacing grooves are provided on the bottom of the second concave cavity at intervals and in parallel. When the gland is installed on the base body, the openings of the first concave cavity and the second concave cavity are arranged opposite to each other in the vertical direction to form a pressure-maintaining cavity, and the first spacing groove and the second spacing groove are directly opposite to each other in the vertical direction.

[0009] The pressure-maintaining rod is arranged on the base body or the pressure cover, and one end of the pressure-maintaining rod extends into the pressure-maintaining cavity. At the same time, the arrangement direction of the pressure-maintaining rod is perpendicular to the arrangement direction of the first spacing groove and the second spacing groove.

[0010] The above-mentioned high-temperature pressure-maintaining tool for bonding polyimide film, wherein a first stop edge is arranged on the base body and located on one side of the first concave cavity, one end of the first spacing groove passes through the first stop edge, and a second stop edge is arranged on the pressure cover and located on one side of the second concave cavity, one end of the second spacing groove passes through the second stop edge, and when the pressure cover is installed on the base body, the first stop edge and the second stop edge are respectively located on both sides of the pressure-maintaining cavity.

[0011] The above-mentioned high-temperature pressure-maintaining tool for bonding polyimide film, wherein the pressure-maintaining rod is an adjusting screw, one end of the base body is provided with an adjusting threaded hole perpendicular to the first spacing groove and connected to the first concave cavity, the threaded end of the pressure-maintaining rod is threadedly connected to the adjusting threaded hole and the end extends into the first concave cavity.

[0012] In the above-mentioned high-temperature pressure-maintaining tool for bonding polyimide films, both ends of the pressure cover are provided with extended connecting parts, and when the pressure cover is installed on the base body, the two connecting parts are respectively overlapped at the two ends of the base body.

[0013] The above-mentioned high-temperature pressure-maintaining tool for bonding polyimide film, wherein the connecting part and the base body are connected by threaded fasteners, each connecting part is provided with a locking hole, and both ends of the base body are provided with connecting threaded holes corresponding to the locking hole, and each locking hole and the corresponding connecting threaded hole are connected by bolts.

[0014] In the above-mentioned high-temperature pressure-maintaining tool for bonding polyimide films, a hollow groove is provided at the bottom of the base body and below the first concave cavity, and the hollow groove runs through both sides of the base body.

[0015] The above-mentioned high-temperature pressure-maintaining tool for bonding polyimide film, wherein a first avoidance groove of the same length is opened on the base body and located at the intersection line of the bottom of the first cavity and the first stop edge, and a second avoidance groove of the same length is opened on the pressure cover and located at the intersection line of the bottom of the second cavity and the second stop edge.

[0016] In the above-mentioned high-temperature pressure-maintaining tool for bonding polyimide film, a third avoidance groove of the same length is provided on the base body and located at the intersection of the cavity side wall and the cavity bottom at one end of the first cavity away from the pressure-maintaining rod.

[0017] The positive effects of the above technical solution are:

[0018] The above-mentioned high-temperature pressure-maintaining tool for bonding polyimide film is provided with a base body with a first concave cavity, and a pressure cover with a second concave cavity is detachably installed on the base body, and the first concave cavity and the second concave cavity are arranged relative to each other to form a pressure-maintaining cavity, which facilitates the placement of the bonded magnets and polyimide film into the pressure-maintaining cavity. At the same time, a pressure-maintaining rod with one end extending into the pressure-maintaining cavity is provided at one end of the base body or the pressure cover, so that after a number of magnets are placed in the pressure-maintaining cavity, a pressing force can be applied by the pressure-maintaining rod, so that the polyimide film is squeezed between adjacent magnets to achieve bonding of the several magnets. In addition, a first spacing groove and a second spacing groove facing each other in the vertical direction are respectively provided on the bottom of the first concave cavity and the second concave cavity, which can not only accommodate the excess part of the polyimide film when it is laid, but also provide space for the subsequent adjustment of the polyimide film, effectively avoiding the problem of uneven laying of the polyimide film. It is not only simple in structure and easy to operate, but also can ensure the quality of the processed products. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A structural diagram of one perspective of an embodiment of a high-temperature pressure-maintaining tool for bonding a polyimide film according to the utility model;

[0020] Figure 2 The utility model is a structural diagram of a base body of a high-temperature pressure-maintaining tool for bonding polyimide films.

[0021] In the accompanying drawings: 1. base body; 11. first concave cavity; 12. first spacing groove; 13. first stop edge; 14. adjusting threaded hole; 15. hollow groove; 16. first avoidance groove; 17. third avoidance groove; 2. pressure cover; 21. second concave cavity; 22. second spacing groove; 23. second stop edge; 24. connecting part; 25. second avoidance groove; 3. pressure maintaining rod. DETAILED DESCRIPTION

[0022] In order to make the technical means, creative features, objectives and effects of the present invention easier to understand, the following embodiments are combined with the attached Figure 1 To Attachment Figure 2 The technical solution provided by the utility model is described in detail, but the following content is not intended to limit the utility model.

[0023] Figure 1 This is a structural diagram of a high temperature pressure holding tool for bonding polyimide films from one perspective of an embodiment of the utility model. Figure 1 As shown, the high-temperature pressure-maintaining tool for bonding polyimide films provided in this embodiment includes: a base body 1 , a pressure cover 2 and a pressure-maintaining rod 3 .

[0024] Figure 2 This is a structural diagram of the base body of a high-temperature pressure-maintaining tool for bonding polyimide films according to the utility model. Figure 1 , Figure 2 As shown, a first concave cavity 11 is provided in the middle of the upper part of the base body 1, and a placement space is provided for the adhesive magnet through the first concave cavity 11. At the same time, a plurality of first spacing grooves 12 are provided on the bottom of the first concave cavity 11 in intervals and parallel to each other. Preferably, when the magnet is placed in the first concave cavity 11, each first spacing groove 12 is located between two adjacent magnets, thereby providing a storage space for the part of the polyimide film that exceeds the first spacing groove 12, which is conducive to the complete unfolding of the polyimide film and avoids the problem of unevenness caused by the accumulation of the polyimide film between the magnets. In addition, both ends of each spacing groove penetrate the two sides of the base body 1, which facilitates the subsequent operator to reach into the first spacing groove 12 through tools to arrange the polyimide film, ensuring that the polyimide film can still be adjusted after the magnet is placed, and the structural design is more reasonable.

[0025] Specifically, the pressure cover 2 is arranged above the base body 1 and is detachably connected to the base body 1, so that the pressure cover 2 and the base body 1 are split structures, thereby facilitating the placement of the magnet and the polyimide film and the removal of the product after the subsequent processing is completed. In addition, a concave second cavity 21 is provided on one side of the pressure cover 2 close to the base body 1, and a space is provided for the placement of the magnetic sheet and the polyimide film through the first cavity 11. At the same time, a plurality of second spacing grooves 22 are provided on the bottom of the second cavity 21 in intervals and parallel to each other, and when the pressure cover 2 is installed on the base body 1, the cavity openings of the first cavity 11 and the second cavity 21 are arranged relative to each other in the vertical direction to form a pressure-maintaining cavity, so that when the magnet and the polyimide film are placed in the first cavity 11 and the second cavity 21, the magnet and the polyimide film can be jointly restricted by the base body 1 and the pressure cover 2, that is, the magnet and the polyimide film can be restricted by the pressure-maintaining cavity formed by the combination of the first cavity 11 and the second cavity 21, ensuring the stability of the state during bonding, thereby ensuring the product quality. In addition, the first spacing groove 12 and the second spacing groove 22 are directly opposite in the vertical direction, so that a first spacing groove 12 and a corresponding second spacing groove 22 can simultaneously accommodate and arrange a piece of polyimide film, ensuring that each piece of polyimide film is in a flat state, thereby avoiding the problem of uneven polyimide film affecting product quality.

[0026] Specifically, a pressure-maintaining rod 3 is arranged on the base body 1 or the pressure cover 2. At this time, one end of the pressure-maintaining rod 3 is extended into the pressure-maintaining cavity, so that the end of the pressure-maintaining rod 3 extending into the pressure-maintaining cavity can support the magnet placed in the pressure-maintaining cavity, so that after the polyimide film is heated and melted, the pressure-maintaining rod 3 can apply a clamping force to the magnet and maintain it for a predetermined time, ensuring that the two adjacent magnets can be firmly bonded, thereby improving product quality. In addition, the arrangement direction of the pressure-maintaining rod 3 is perpendicular to the arrangement direction of the first spacing groove 12 and the second spacing groove 22, so that when the magnet is arranged parallel to the first spacing groove 12 and the second spacing groove 22, the pressure-maintaining rod 3 can press the magnet in a positive direction, preventing the problem of pressure deviation caused by the tilt angle between the pressure-maintaining rod 3 and the magnet, further preventing the problem of uneven bonding between the magnets, and improving product quality.

[0027] More specifically, a first stop edge 13 is also provided on the base body 1 and located on one side of the first concave cavity 11. The first stop edge 13 forms a surrounding structure on one side of the first concave cavity 11, so as to limit one side of the magnet placed in the pressure-maintaining cavity and maintain the accuracy of the position of the magnet placed in the pressure-maintaining cavity. At this time, one end of the first spacing groove 12 in the first concave cavity 11 passes through the first stop edge 13, so as to avoid the problem that the first stop edge 13 hinders the expansion of the polyimide film, and also facilitates the operator to adjust the polyimide film. In addition, a second stop edge 23 is provided on the pressure cover 2 and located on one side of the second concave cavity 21. The second stop edge 23 forms a surrounding structure on one side of the second concave cavity 21, so as to limit the other side of the magnet placed in the pressure-maintaining cavity and also maintain the accuracy of the position of the magnet placed in the pressure-maintaining cavity. Similarly, one end of the second spacing groove 22 passes through the second stop edge 23, so as to avoid the problem that the second stop edge 23 hinders the expansion of the polyimide film and facilitates the operator to adjust the polyimide film. Furthermore, when the pressure cover 2 is installed on the base body 1, the first stop edge 13 and the second stop edge 23 are respectively located on both sides of the pressure-maintaining cavity, that is, the four sides of the magnet are limited respectively by the bottom of the first concave cavity 11 and the second concave cavity 21 and the first stop edge 13 and the second stop edge 23, thereby ensuring the accurate position of the magnet when placed in the pressure-maintaining cavity and ensuring product quality.

[0028] More specifically, the pressure maintaining rod 3 is an adjusting screw. Preferably, the pressure maintaining rod 3 is installed on the base body 1. At this time, an adjusting threaded hole 14 is opened at one end of the base body 1, which is perpendicular to the first spacing groove 12 and connected to the first concave cavity 11, so that the arrangement direction of the adjusting threaded hole 14 is consistent with the telescopic direction of the pressure maintaining rod 3. At the same time, the threaded end of the pressure maintaining rod 3 is threadedly connected to the adjusting threaded hole 14 and the end of its threaded end extends into the first concave cavity 11. The length of one end of the pressure maintaining rod 3 extending into the first concave cavity 11 can be adjusted by twisting the pressure maintaining rod 3 in the forward and reverse directions, thereby realizing the tightening or loosening of the magnet placed in the pressure maintaining cavity, meeting the requirements of pressure maintaining and material feeding during processing.

[0029] More specifically, extended connecting parts 24 are provided at both ends of the pressure cover 2, and the installation carriers at both ends of the pressure cover 2 are expanded through the connecting parts 24, so that when the pressure cover 2 is subsequently installed on the base body 1, the two connecting parts 24 at both ends of the pressure cover 2 can be overlapped at the two ends of the base body 1 respectively. At the same time, the pressure cover 2 itself can be embedded in the first concave cavity 11, so that the distance between the pressure cover 2 and the base body 1 can be adjusted by raising or lowering the height of the connecting part 24 relative to the base body 1, which meets the bonding processing of magnets of different sizes, ensures that the pressure cover 2 can form a stable pressure-maintaining cavity with the base body 1, and further ensures product quality.

[0030] More specifically, each connecting portion 24 is connected to the base body 1 by a threaded fastener. At this time, a locking hole is opened on each connecting portion 24. At the same time, connecting threaded holes corresponding to the locking holes are opened at both ends of the base body 1. When the pressure cover 2 is installed on the base body 1, each locking hole and the corresponding connecting threaded hole are connected and locked by bolts. Disassembly and assembly are more convenient, thereby facilitating the placement and removal of the magnet in the pressure maintaining chamber, and the structural design is more reasonable.

[0031] More specifically, a hollow groove 15 is provided at the bottom of the base body 1 and below the first concave cavity 11. At this time, the hollow groove 15 passes through both sides of the base body 1, and the direction in which the hollow groove 15 passes through the base body 1 is consistent with the direction in which the first concave cavity 11 passes through the base body 1. The hollow groove 15 allows the bottom of the first concave cavity 11 to be suspended in the air, which facilitates the rapid heating of the bottom potential of the first concave cavity 11 during heating, thereby improving processing efficiency. At the same time, it can also reduce the material usage of the base body 1, reduce weight, save resources, and reduce costs.

[0032] More specifically, a first avoidance groove 16 with the same length as the intersection line is opened on the base body 1 and located at the intersection line of the cavity bottom of the first concave cavity 11 and the first stop edge 13. At the same time, a second avoidance groove 25 with the same length as the intersection line is opened on the pressure cover 2 and located at the intersection line of the cavity bottom of the second concave cavity 21 and the second stop edge 23. The first avoidance groove 16 and the second avoidance groove 25 are used to eliminate the problem of not being able to process the corners in place, and the corner cleaning operation is realized, ensuring that the magnet can be placed in place when placed in the pressure holding cavity, further ensuring product quality.

[0033] More specifically, a third avoidance groove 17 with the same length as the intersection line is provided on the base body 1 and located at the intersection line of the cavity side wall and the cavity bottom at the end of the first cavity 11 away from the pressure-maintaining rod 3, which also ensures that the magnet placed in the pressure-maintaining cavity can be placed in place. In addition, since one end of the magnet placed in the pressure-maintaining cavity is supported by the pressure-maintaining rod 3, the magnet will not contact the cavity side wall of the first cavity 11 near the end where the pressure-maintaining rod 3 is set, so that there is no need to perform corner cleaning processing on the intersection line of the cavity side wall and the cavity bottom at the end of the first cavity 11 near the pressure-maintaining rod 3, which reduces the processing amount and facilitates processing.

[0034] The high-temperature pressure-maintaining tool for bonding polyimide film provided in this embodiment comprises a base body 1, a pressure cover 2 and a pressure-maintaining rod 3; by providing a plurality of first spacing grooves 12 and a first cavity 11 on the base body 1, and removing and installing the pressure cover 2 with a second cavity 21 on the base body 1, and the second cavity 21 has a plurality of second spacing grooves 22, and when the pressure cover 2 is installed on the base body 1, the cavity openings of the first cavity 11 and the second cavity 21 are arranged relative to each other to form a pressure-maintaining cavity, and the first spacing grooves 12 and the second spacing grooves 22 are opposite to each other, and in addition, on the base body 1 or the pressure cover 2 A pressure-maintaining rod 3 with one end extending into the pressure-maintaining cavity is provided at one end, so that the magnet and the polyimide film placed in the pressure-maintaining cavity can be supported by the pressure-maintaining rod 3, and the polyimide film is hot-melted at high temperature to achieve the bonding of the magnet. In addition, the first spacing groove 12 and the second spacing groove 22 can provide an accommodation space for the excess size of the polyimide film, thereby avoiding the accumulation of the polyimide film. In addition, it is also convenient for the operator to make later adjustments to the placed polyimide film, thereby preventing the polyimide film from being uneven between two adjacent magnets. The structure is simple, the operation is convenient, and the product quality is guaranteed.

[0035] The above are only preferred embodiments of the present invention, and do not limit the implementation mode and protection scope of the present invention. Those skilled in the art should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A high temperature pressure holding tool for bonding polyimide films, characterized in that: include: A base body, wherein a first concave cavity is provided in the middle of the upper portion of the base body, and a plurality of first spacing grooves are provided at intervals and in parallel on the bottom of the first concave cavity, and both ends of each of the first spacing grooves pass through two side surfaces of the base body; A gland, the gland is arranged above the base body and is detachably connected to the base body, a second concave cavity is provided on a side of the gland close to the base body, and a plurality of second spacing grooves are provided on the bottom of the second concave cavity at intervals and in parallel, and when the gland is installed on the base body, the cavity openings of the first concave cavity and the second concave cavity are arranged opposite to each other in the vertical direction to form a pressure-maintaining cavity, and the first spacing groove and the second spacing groove are directly opposite in the vertical direction; A pressure maintaining rod is arranged on the base body or the pressure cover, and one end of the pressure maintaining rod extends into the pressure maintaining cavity. At the same time, the arrangement direction of the pressure maintaining rod is perpendicular to the arrangement direction of the first spacing groove and the second spacing groove.

2. The high temperature pressure-maintaining tool for bonding polyimide films according to claim 1, characterized in that: A first stop edge is provided on the base body and located on one side of the first concave cavity, and one end of the first spacing groove passes through the first stop edge. A second stop edge is provided on the pressure cover and located on one side of the second concave cavity, and one end of the second spacing groove passes through the second stop edge. When the pressure cover is installed on the base body, the first stop edge and the second stop edge are respectively located on both sides of the pressure maintaining cavity.

3. The high temperature pressure-maintaining tool for bonding polyimide films according to claim 1, characterized in that: The pressure maintaining rod is an adjusting screw, and one end of the base body is provided with an adjusting threaded hole perpendicular to the first spacing groove and connected to the first concave cavity. The threaded end of the pressure maintaining rod is threadedly connected to the adjusting threaded hole and the end extends into the first concave cavity.

4. The high temperature pressure-maintaining tool for bonding polyimide films according to claim 1, characterized in that: Both ends of the pressure cover are provided with extended connecting parts. When the pressure cover is installed on the base body, the two connecting parts are overlapped at the two ends of the base body respectively.

5. The high temperature pressure-maintaining tool for bonding polyimide films according to claim 4, characterized in that: The connecting part and the base body are connected by threaded fasteners. A locking hole is provided on each connecting part. Connecting threaded holes corresponding to the locking hole are provided at both ends of the base body. Each locking hole and the corresponding connecting threaded hole are connected by bolts.

6. The high temperature pressure-maintaining tool for bonding polyimide films according to claim 1, characterized in that: A hollow groove is provided at the bottom of the base body and below the first concave cavity, and the hollow groove runs through two sides of the base body.

7. The high temperature pressure-maintaining tool for bonding polyimide films according to claim 2, characterized in that: A first avoidance groove of the same length is provided on the base body and located at the intersection of the bottom of the first concave cavity and the first retaining edge, and a second avoidance groove of the same length is provided on the pressure cover and located at the intersection of the bottom of the second concave cavity and the second retaining edge.

8. The high temperature pressure-maintaining tool for bonding polyimide films according to claim 3, characterized in that: A third avoidance groove of the same length is provided on the base body and is located at the intersection of the cavity side wall of the first concave cavity away from the end where the pressure-maintaining rod is arranged and the cavity bottom.

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