Motor stator and rotor LCP (Liquid Crystal Polymer) glue overflow prevention injection mold

Abstract

The utility model relates to a motor stator and rotor LCP (Liquid Crystal Polymer) glue overflow prevention injection mold, which is applied to the technical field of plastic motor stator and rotor injection molding and solves the problems that burrs easily exist on the outer side surface of a transverse part of an injection molded product, the actual working requirements of the product are not met and the injection molding quality of the product is reduced. A first sliding block, an abutting piece, a second sliding block and a positioning block are arranged on the rear mold core, a cavity is defined by the inner side faces of the first sliding block, the abutting piece, the second sliding block and the positioning block, the abutting piece comprises an abutting block and a reset spring which are obliquely arranged in the rear mold core in a sliding mode, and the shape of the inner side face of the abutting block is matched with the shape of the corresponding face of a product. The outer side face of the abutting block is an inclined face, the transverse length of the upper end of the abutting block is larger than that of the lower end of the abutting block, and the position, corresponding to the inclined face of the abutting block, in the rear mold core is also inclined. A top pressing piece is arranged on the front mold core in a sliding manner in a position corresponding to the propping block, and the top pressing piece props against the propping block to move during mold closing; the injection mold has the effects of not easily generating burrs and improving the injection molding quality of products.

Description

Technical Field

[0001] This utility model belongs to the field of plastic motor stator and rotor injection molding technology, specifically relating to an LCP anti-overflow injection mold for motor stator and rotor. Background Technology

[0002] refer to Figure 1 For the motor stator and rotor 121' to be injection molded, Figure 2 For the injection molding of a plastic motor stator rotor 12' made of LCP material, based on actual working requirements, when processing this motor stator rotor 121', only the inner surfaces of the two opposing horizontal parts and the outer surface of the vertical part need to be injection molded. The a and b surfaces of the motor stator rotor 121' do not need to be injection molded. When the existing injection mold is used to injection mold this product, the a and b surfaces of the motor stator rotor 121' do not fit tightly with the corresponding inner wall of the injection mold cavity, and gaps are likely to exist. During injection, due to the good fluidity of LCP material, the LCP injection material entering the injection mold cavity is easy to flow into the gaps, resulting in burrs on the a and b surfaces of the injection molded plastic motor stator rotor 12', which does not meet the actual working requirements of the product and reduces the injection molding quality. Utility Model Content

[0003] The purpose of this invention is to provide an LCP anti-overflow injection mold for motor stators and rotors, which solves the problem that existing injection-molded plastic motor stators and rotors are prone to having burrs on the outer surface, failing to meet the actual working requirements of the product and reducing the quality of the injection molding.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] The purpose of this utility model is to provide an anti-overflow injection mold for LCP (Liquid Cemented Polymer) in motor stator and rotor, including a rear mold core and a front mold core that cooperates with the rear mold core. The rear mold core is characterized by having a first slider, a clamping member, a second slider, and a positioning block arranged sequentially along its circumference. The inner surfaces of the first slider, the clamping member, the second slider, and the positioning block form a molding cavity. The clamping member includes a clamping block obliquely slidably disposed within the rear mold core and a return spring vertically disposed at the bottom end of the clamping block. The bottom end of the return spring abuts against the rear mold core. The inner surface shape of the clamping block is adapted to the shape of surface a of the plastic motor stator and rotor. The outer surface of the clamping block is inclined. The upper lateral length of the clamping block is greater than its lower lateral length. The position within the rear mold core corresponding to the inclined surface of the clamping block is also inclined.

[0006] A top pressing member is slidably disposed on the front mold core at a position corresponding to the abutment block. When the mold is closed, the top pressing member presses the abutment block to move.

[0007] Furthermore, a limiting plate for pressing the abutment block is provided on the outer edge of the upper end face of the rear mold core, and a stepped surface for placing the limiting pressure plate is provided on the rear mold core. The position where the abutment block contacts the limiting pressure plate is also provided as a stepped surface.

[0008] Furthermore, the two sides of the abutment block in the lateral direction are provided with limiting protrusions, the limiting protrusions are also inclined, and the inclination angle of the limiting protrusions is consistent with the inclination angle of the inclined surface of the abutment block. The rear mold core is provided with a limiting guide groove that cooperates with the limiting protrusions.

[0009] Furthermore, a limiting groove is provided on the bottom end face of the clamping block, and the reset spring part is embedded in the limiting groove.

[0010] Furthermore, the upper surface of the clamping block is provided with a positioning blind hole, and a positioning bolt is provided on the front mold core at a position corresponding to the positioning blind hole.

[0011] Furthermore, the top pressing component includes a top pressing block and a top pressing spring disposed on the top of the top pressing block. An embedded through hole is provided in the front mold core at a position corresponding to the abutment block, and the top pressing block is slidably disposed in the embedded through hole.

[0012] Furthermore, a buckle is provided on one side of the upper end face of the top pressure block, and a second stepped surface that cooperates with the buckle is provided on the inner wall of the top end of the embedded through hole. The longitudinal height of the second stepped surface is the same as the longitudinal movement stroke of the top pressure block.

[0013] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art:

[0014] This utility model discloses an LCP anti-overflow injection mold for motor stators and rotors. By having a clamping block obliquely arranged in the rear mold core and an ejector block arranged in the front mold core, the ejector block drives the clamping block to move obliquely during mold closing, thereby pushing the product to be injected towards the positioning block until the clamping block and the positioning block clamp the main product. During subsequent injection, it ensures that the surface of the product in contact with the clamping block and the positioning block is not prone to burrs, thus improving the injection molding quality of the product. Attached Figure Description

[0015] The following sections will describe some specific embodiments of the present invention in a detailed manner by way of example and not limitation, with reference to the accompanying drawings. The same reference numerals in the drawings denote the same or similar parts or components. Those skilled in the art should understand that these drawings are not necessarily drawn to scale. In the drawings:

[0016] Figure 1 This is a schematic diagram of the stator and rotor of the motor in a preferred embodiment of the present invention;

[0017] Figure 2 This is a schematic diagram of the injection-molded plastic motor stator and rotor structure in a preferred embodiment of this utility model;

[0018] Figure 3 This is a structural schematic diagram of the injection mold in the open state in a preferred embodiment of the present invention;

[0019] Figure 4 yes Figure 3 Enlarged view of point A in the middle;

[0020] Figure 5 This is a cross-sectional view of the injection mold in the open state in a preferred embodiment of this utility model;

[0021] Figure 6 This is an exploded view of the abutment member in a preferred embodiment of this utility model;

[0022] Figure 7 This is an exploded view of the rear mold core structure in a preferred embodiment of this utility model.

[0023] The reference numerals in the attached figures are explained as follows:

[0024] 1. Rear mold core; 2. Front mold core; 3. First slider; 4. Clamping component; 41. Clamping block; 42. Return spring; 5. Second slider; 6. Positioning block; 7. Cavity; 8. Stepped surface; 10. Ejector; 101. Ejector block; 102. Ejector spring; 11. Through hole; 12. Plastic motor stator and rotor; 121. Motor stator and rotor; 13. Undercut; 14. Second stepped surface; 15. Limiting plate; 16. Limiting protrusion; 17. Limiting guide groove; 18. Limiting recess; 19. Positioning blind hole; 20. Positioning bolt. Detailed Implementation

[0025] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0026] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and 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," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0028] refer to Figures 1-4 This utility model provides an LCP anti-overflow injection mold for motor stator and rotor, including a front mold (not shown in the figure) and a rear mold (not shown in the figure) that cooperates with the front mold. The rear mold is provided with a rear mold core 1, and the front mold is provided with a front mold core 2 that cooperates with the rear mold core 1. The rear mold core 1 is provided with a first slider 3, a clamping member 4, a second slider 5 and a positioning block 6 arranged sequentially along its circumference. The first slider 3 and the second slider 5 are arranged opposite to each other, and the clamping member 4 and the positioning block 6 are arranged opposite to each other. The inner sides of the first slider 3, the clamping member 4, the second slider 5 and the positioning block 6 enclose a cavity 7. The first slider 3 and the second slider 5 are laterally slidable in the rear mold core 1, which facilitates the placement of the motor stator and rotor 121 to be injected into the cavity 7, and also facilitates the removal of the injection-molded plastic motor stator and rotor 121 from the cavity 7. The inner side shape of the positioning block 6 is adapted to the b-side shape of the motor stator and rotor 121.

[0029] refer to Figures 4-6 The clamping component 4 includes a clamping block 41 that is obliquely slidably disposed within the rear mold core 1 and a return spring 42 that is vertically disposed at the bottom end of the clamping block 41. The bottom end of the return spring 42 abuts against the interior of the rear mold core 1. The inner surface shape of the clamping block 41 is adapted to the shape of surface a of the motor stator and rotor 121. The outer surface of the clamping block 41 is inclined. The upper lateral length of the clamping block 41 is greater than the lower lateral length. The position in the rear mold core 1 corresponding to the inclined surface of the clamping block 41 is also inclined. The inclined arrangement ensures that the clamping block 41 can move inclined within the rear mold core 1.

[0030] refer to Figure 3 and Figure 5A top pressing component 10 is slidably disposed on the front mold core 2 at a position corresponding to the clamping block 41. The top pressing component 10 includes a top pressing block 101 and a top pressing spring 102 disposed on the top of the top pressing block 101. An embedded through hole 11 is disposed in the front mold core 2 at a position corresponding to the clamping block 41. The top pressing block 101 is slidably disposed in the embedded through hole 11. The top end of the top pressing spring 102 is connected to the front mold in the injection molding die.

[0031] refer to Figures 2-6 The working principle of clamping the motor stator and rotor 121 to be injection molded is as follows: The motor stator and rotor 121 to be injection molded is placed in the cavity 7. Then, during the mold closing process, the top pressure block 101 applies a downward pushing force to the clamping block 41. The clamping block 41 moves obliquely downward under the force, which pushes the motor stator and rotor 121 towards the positioning block 6 until the clamping block 41 and the positioning block 6 clamp the motor stator and rotor 121 tightly, ensuring that the inner side of the clamping block 41 is tightly attached to the a side of the motor stator and rotor 121 without gaps. At the same time, the inner side of the positioning block 6 is also tightly attached to the b side of the motor stator and rotor 121 without gaps. When the subsequent injection molding process is carried out, the liquid injection molding material will not flow into the a side and b side of the motor stator and rotor 121, thereby ensuring that no burrs appear on the a side and b side of the plastic motor stator and rotor 121 after injection molding. When the mold is opened, after the clamping block 41 is no longer under the pressure of the top pressure block 101, the return spring 42 compressed at the bottom of the clamping block 41 drives the clamping block 41 to return to its original position and move away from the injection-molded product.

[0032] refer to Figure 5 An undercut 13 is provided on one side of the upper end face of the top pressing block 101. The inner wall of the top end of the through hole 11 is provided with a second stepped surface 14 that cooperates with the undercut 13. The height of the longitudinal surface of the second stepped surface 14 is the same as the travel of the longitudinal movement of the top pressing block 101. The cooperation between the undercut 13 and the second stepped surface 14 can limit the travel of the longitudinal movement of the top pressing block 101, thereby limiting the travel of the oblique movement of the clamping block 41 and improving the clamping accuracy.

[0033] refer to Figure 5 The upper surface of the clamping block 41 is provided with a positioning blind hole 19. The front mold core 2 is provided with a positioning bolt 20 at the position corresponding to the positioning blind hole 19. When the mold is closed, the positioning bolt 20 is inserted into the positioning blind hole 19. When the cavity 7 is filled with injection molding material, the clamping block 41 will not move, thus improving the firmness.

[0034] refer to Figures 5-7The upper outer edge of the rear mold core 1 is provided with a limiting pressure plate 15 for pressing the clamping block 41. The rear mold core 1 is provided with a stepped surface 8 for placing the limiting pressure plate 15. The contact position between the clamping block 41 and the limiting pressure plate 15 is also provided with a stepped surface 8. The limiting pressure plate 15 is fixed to the stepped surface 8 of the rear mold core 1 by bolts. In the mold open state, the limiting pressure plate 15 plays a limiting role for the clamping block 41, so that the upper top surface of the clamping block 41 is flush with the upper end surface of the rear mold core 1, preventing the upper top surface of the clamping block 41 from protruding from the rear mold core 1 and improving the aesthetics of the injection mold.

[0035] refer to Figures 5-7 The two sides of the clamping block 41 in the lateral direction are provided with limiting protrusions 16. The limiting protrusions 16 are also inclined, and the inclination angle of the limiting protrusions 16 is consistent with the inclination angle of the inclined surface of the clamping block 41. The rear mold core 1 is provided with a limiting guide groove 17 that cooperates with the limiting protrusions 16. The cooperation between the limiting protrusions 16 and the limiting groove ensures that the clamping block 41 is not prone to deflection when it moves, and improves the stability of the clamping block 41 when it slides.

[0036] refer to Figures 5-7 The bottom end face of the clamping block 41 is provided with a limiting groove 18, and part of the structure of the return spring 42 is embedded in the limiting groove 18. This structure ensures the compactness of the overall structure and improves the stability when the return spring 42 drives the clamping block 41 to move.

[0037] In summary, by providing an oblique clamping block 41 in the rear mold core 1 and an ejector block 101 in the front mold core 2, the ejector block 101 drives the clamping block 41 to move obliquely during mold closing, thereby pushing the motor stator and rotor 121 to be injected towards the positioning block 6 until the clamping block 41 and the positioning block 6 clamp the main motor stator and rotor 121. This ensures that the surfaces of the motor stator and rotor 121 in contact with the clamping block 41 and the positioning block 6 are less prone to burrs during subsequent injection molding, thus improving the injection molding quality of the product.

[0038] The above embodiments are only for illustrating the technical concept and features of this utility model. Their purpose is to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be used to limit the protection scope of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the protection scope of this utility model.

Claims

1. A motor stator and rotor LCP anti-overflow injection mold, comprising a rear mold core (1) and a front mold core (2) cooperating with the rear mold core (1), characterized in that, The rear mold core (1) is provided with a first slider (3), a clamping member (4), a second slider (5) and a positioning block (6) in sequence along its circumference. The inner sides of the first slider (3), the clamping member (4), the second slider (5) and the positioning block (6) form a cavity (7). The clamping member (4) includes a clamping block (41) that is obliquely slidably disposed in the rear mold core (1) and a return spring (42) that is vertically disposed at the bottom end of the clamping block (41). The bottom end of the return spring (42) abuts against the rear mold core (1). The inner side shape of the clamping block (41) is adapted to the shape of the a-side of the plastic motor stator and rotor (12). The outer side of the clamping block (41) is inclined. The upper horizontal length of the clamping block (41) is greater than the lower horizontal length. The position in the rear mold core (1) corresponding to the inclined surface of the clamping block (41) is also inclined. A top pressing member (10) is slidably disposed on the front mold core (2) at a position corresponding to the abutment block (41). When the mold is closed, the top pressing member (10) presses the abutment block (41) to move.

2. The LCP anti-overflow injection mold for motor stator and rotor according to claim 1, characterized in that, The upper end face of the rear mold core (1) is provided with a limiting pressure plate (15) for pressing the clamping block (41). The rear mold core (1) is provided with a stepped surface (8) for placing the limiting pressure plate (15). The position where the clamping block (41) contacts the limiting pressure plate (15) is also provided with a stepped surface (8).

3. The motor stator and rotor LCP anti-overflow injection mold according to claim 1 or 2, characterized in that, The clamping block (41) has limit protrusions (16) on both sides in the lateral direction. The limit protrusions (16) are also inclined, and the inclination angle of the limit protrusions (16) is consistent with the inclination angle of the inclined surface of the clamping block (41). The rear mold core (1) is provided with a limit guide groove (17) that cooperates with the limit protrusions (16).

4. The LCP anti-overflow injection mold for motor stator and rotor according to claim 3, characterized in that, The bottom end face of the clamping block (41) is provided with a limiting groove (18), and part of the structure of the reset spring (42) is embedded in the limiting groove (18).

5. The LCP anti-overflow injection mold for motor stator and rotor according to claim 4, characterized in that, The upper surface of the clamping block (41) is provided with a positioning blind hole (19), and a positioning bolt (20) is provided on the front mold core (2) at the position corresponding to the positioning blind hole (19).

6. The motor stator and rotor LCP anti-overflow injection mold according to claim 1 or 5, characterized in that, The top pressing component (10) includes a top pressing block (101) and a top pressing spring (102) disposed on the top of the top pressing block (101). An embedded through hole (11) is provided in the front mold core (2) at a position corresponding to the abutment block (41). The top pressing block (101) is slidably disposed in the embedded through hole (11).

7. The motor stator and rotor LCP anti-overflow injection mold according to claim 6, characterized in that, The top end face of the top pressure block (101) is provided with a buckle (13), and the inner wall of the top end of the embedded through hole (11) is provided with a second stepped surface (14) that cooperates with the buckle (13). The longitudinal height of the second stepped surface (14) is the same as the longitudinal movement stroke of the top pressure block (101).

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