Secondary curing and shaping tool used after injection molding and glue coating of long stator iron core
Through the support and gravity pressure control of the fixed tooling, the problem of epoxy resin expansion and contraction during the secondary curing of the long stator core is solved, and the stability of product plane and high pass rate are achieved.
Patent Information
- Application Number
- CN202422287695.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-19
- Publication Date
- 2025-08-01
- Estimated Expiration
- 2034-09-19
AI Technical Summary
The prior art cannot effectively control the expansion and contraction of epoxy resin during the secondary curing of the long stator core, resulting in difficulty in ensuring that the product plane is within 0.1, affecting the product pass rate.
A fixed tooling including a lower pad plate, an upper press plate and a support member is adopted. The height of the support member is less than 0.05mm, the upper and lower parallelism of the rectangular support block is less than 0.02mm, the plate groove width is appropriate, and the gravity pressure is stronger than 10g/cm², which is used to support and limit the expansion and contraction of the long stator core and ensure that the flatness is within 0.1.
By controlling the expansion and contraction of the epoxy resin, the final planarity of the long stator core is within 0.1, the product pass rate is improved, and the tooling structure is simple and easy to operate.
Smart Images
Figure CN223173552U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a secondary curing and shaping tooling for a long stator core after injection molding and rubber coating, belonging to the technical field of injection molding and shaping tooling. Background Technique
[0002] The long stator core is applied to the electromagnetic system of the maglev train track and is a rectangular block. Among the upper and lower side surfaces, one side surface has a dovetail plate partially embedded in the side surface, and the other side surface has a wire groove. The long stator core in application must be subjected to surface insulation treatment. Specifically, it is injection molded and rubber coated (epoxy resin) using a mold in a high-temperature environment, and then cooled and demolded.
[0003] Due to the technical requirement that the flatness of the long stator core is less than 0.1, the product surface is flat and there is no deformation. And the shrinkage of the epoxy resin itself is about 1%. Coupled with the influence of other unstable factors, relying on the expansion and contraction of the epoxy resin itself, it is very difficult for the product to ensure that the flatness is within 0.1.
[0004] The existing process is to directly perform secondary curing on the long stator core after demolding, that is, to gradually increase the temperature and then gradually decrease the temperature again in the curing furnace. During the secondary curing process, no effective control measures are taken for the expansion and contraction of the surface epoxy resin, and the product qualification rate is very low. Content of the Utility Model
[0005] The technical problem to be solved by the utility model is: how to control the long stator core after rubber coating and demolding during the secondary curing process to ensure that the flatness of the final product is within the range of 0.1.
[0006] In response to the above problems, the technical solution proposed by the utility model is:
[0007] A secondary curing and shaping tooling for a long stator core after injection molding and rubber coating, including a lower backing plate, an upper pressing plate and a support member. A plate groove corresponding to the dovetail plate is provided on the lower bottom surface of the upper pressing plate. The height of the support member is greater than the height of the long stator core after rubber coating, and the height difference is less than 0.05 mm. During application, the support member is located between the lower backing plate and the upper pressing plate to support the upper pressing plate. The long stator core with rubber coating is located between the lower backing plate and the upper pressing plate, and the dovetail plate on the upper surface of the long stator core is located in the plate groove on the lower bottom surface of the upper pressing plate.
[0008] The support member is four rectangular support blocks.
[0009] The parallelism of the upper and lower end faces of the rectangular support block is less than 0.02.
[0010] The bottom end face of the rectangular support block is provided with a positioning post, and a positioning hole capable of inserting the positioning post is provided on the lower backing plate.
[0011] The cross section of the plate groove is a rectangular space, and the groove width is greater than the width of the dovetail plate.
[0012] Both ends of the two side surfaces of the lower backing plate and both ends of the two side surfaces of the upper pressing plate are provided with threaded holes for temporarily installing hanging rings with screw rods.
[0013] The gravitational pressure on the bottom surface of the upper pressing plate is greater than 10 g / cm². Beneficial effects
[0014] 1. It can control the expansion and contraction of the epoxy resin on the surface of the long stator core after the rubber coating is demolded during the secondary curing process, ensuring that the flatness of the final product is within the range of 0.1;
[0015] 2. The fixture is simply set up and easy to operate. Description of the drawings
[0016] Figure 1 It is a three-dimensional schematic diagram when the sizing tooling described in Embodiment 1 is applied;
[0017] Figure 2 It is a disassembled schematic diagram of the sizing tooling described in Embodiment 1;
[0018] Figure 3 It is a three-dimensional schematic diagram of the lower backing plate of the sizing tooling described in Embodiment 2.
[0019] In the figure: 1. Upper pressing plate; 101. Plate groove; 2. Lower backing plate; 201. Positioning hole; 3. Rectangular support block; 301. Positioning post; 4. Threaded hole; 5. Hanging ring; 6. Long stator core; 601. Dovetail plate. Specific implementation manners
[0020] The following further describes the present utility model with reference to the drawings: Embodiment 1
[0021] As Figure 1 , 2 shown, a secondary curing sizing tooling for a long stator core after injection molding and rubber coating includes a lower backing plate 2, an upper pressing plate 1 and a support member. A plate groove 101 corresponding to the dovetail plate 601 is provided on the lower bottom surface of the upper pressing plate 1. The height of the support member is greater than the height of the long stator core 6 after rubber coating, and the height difference is less than 0.05 mm. During application (secondary curing), the support member is located between the lower backing plate 2 and the upper pressing plate 1 to support the upper pressing plate 1. The rubber-coated long stator core 6 is located between the lower backing plate 2 and the upper pressing plate 1, and the dovetail plate 601 on the upper surface of the long stator core 6 is located in the plate groove 101 on the lower bottom surface of the upper pressing plate 1. In this way, the lower surface of the rubber-coated (epoxy resin) long stator core 6 presses on the lower backing plate 2, and the gap between the upper surface and the lower surface of the upper pressing plate 1 is less than 0.05 mm, thereby restricting the expansion and contraction thickness of the epoxy resin on the upper and lower surfaces of the long stator core during the secondary curing process, and enabling its flatness to be less than 0.1.
[0022] The support member is four rectangular support blocks 3. The parallelism of the upper and lower end faces of the rectangular support block 3 is less than 0.02. In this way, the gap between the upper pressure plate 1 pressing on the four rectangular support blocks 3 and the upper surface of the long stator core 6 can still be guaranteed to be less than 0.05 mm.
[0023] The cross-section of the plate groove 101 is a rectangular space, and the groove width is greater than the width of the dovetail plate 601, ensuring that the dovetail plate 601 can smoothly enter and exit the plate groove 101.
[0024] Threaded holes 4 are provided at both ends of the two side faces of the lower backing plate 2 and at both ends of the two side faces of the upper pressure plate 1, for temporarily installing hanging rings 5 with screw rods. The installed hanging rings 5 are used to hang ropes to lift the lower backing plate 2 and the upper pressure plate 1.
[0025] The gravitational pressure on the bottom surface of the upper pressure plate 1 is greater than 10 g / cm², ensuring that sufficient gravity can counteract the expansion pressure generated during the secondary curing process of the epoxy resin, so as to limit it within the specified flatness range. Embodiment 2
[0026] As Figure 3 shown, the difference from Embodiment 1 is that: a positioning post 301 is provided at the bottom end face of the rectangular support block 3, and a positioning hole 201 that can insert the positioning post 301 is provided on the lower backing plate 2. In this way, when placing the long stator core, the rectangular support block 3 will not be displaced due to accidental collision.
[0027] The above embodiments are only used to describe the present invention more clearly, and cannot be regarded as limiting the protection scope covered by the present invention. Any modification in an equivalent form should be regarded as falling within the protection scope covered by the present invention.
Claims
1. A secondary curing and shaping tooling for a long stator core after injection molding and rubber coating, characterized in that: It includes a lower backing plate (2), an upper pressing plate (1) and a support member. A plate groove (101) corresponding to a dovetail plate (601) is provided on the lower bottom surface of the upper pressing plate (1). The height of the support member is greater than the height of the long stator core (6) after rubber coating, and the height difference is less than 0.05 mm. During application, the support member is located between the lower backing plate (2) and the upper pressing plate (1) to support the upper pressing plate (1). The long stator core (6) with rubber coating is located between the lower backing plate (2) and the upper pressing plate (1), and the dovetail plate (601) on the upper surface of the long stator core (6) is located in the plate groove (101) on the lower bottom surface of the upper pressing plate (1).
2. The secondary curing and shaping tooling for the long stator core after injection molding and rubber coating according to claim 1, wherein: The support member is four rectangular support blocks (3).
3. The secondary curing and shaping tooling for the long stator core after injection molding and rubber coating according to claim 2, characterized in that: The parallelism of the upper and lower end faces of the rectangular support block (3) is less than 0.
02.
4. The secondary curing and shaping tooling for the long stator core after injection molding and rubber coating according to claim 2, wherein: A positioning post (301) is provided on the bottom end face of the rectangular support block (3), and a positioning hole (201) capable of inserting the positioning post (301) is provided on the lower backing plate (2).
5. The secondary curing and shaping tooling for the long stator core after injection molding and rubber coating according to claim 1, wherein: The cross-section of the plate groove (101) is a rectangular space, and the groove width is greater than the width of the dovetail plate (601).
6. The secondary curing and shaping tooling for the long stator core after injection molding and rubber coating according to claim 1, wherein: Threaded holes (4) are provided at both ends of the two side faces of the lower backing plate (2) and at both ends of the two side faces of the upper pressing plate (1) for temporarily installing hanging rings (5) with screw rods.
7. The secondary curing and shaping tooling for the long stator core after injection molding and rubber coating according to claim 1, characterized in that: The gravitational pressure on the bottom surface of the upper pressing plate (1) is greater than 10 g / cm².