Automobile plastic accessory mold positioning mechanism
By designing buffer grooves and elastic devices in automotive plastic accessories molds, buffer parts and reduction springs, oblique columns and buffer components in buffer grooves, the problem of too fast speed during lateral demoulding is solved, and scraping during demoulding is reduced Trace and hole deformation risk ensure surface quality of molded parts.
Patent Information
- Application Number
- CN202420570505.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-23
- Publication Date
- 2025-01-07
- Estimated Expiration
- 2034-03-23
AI Technical Summary
When existing automotive plastic accessories molds are demolded laterally, the demolding speed of the left and right sides and lower sides is too fast, resulting in scratches or defects on the surface of the molded part, and even deforming the holes of the molded part.
A mold positioning mechanism for automotive plastic accessories is designed, including an upper positioning member, a lower positioning member and a sliding assembly. By setting up a buffer groove and an elastic device, a reduction spring and a buffer spring, a buffer member and a reduction spring in the buffer groove, and an oblique column. and buffer components to achieve buffering effect and reduce the initial acceleration during demolding.
Through the buffering device, the demolding speed and force are reduced, so that the molded parts reduce wear during the demolding process, and avoid surface scratches and hole deformation problems.
Smart Images
Figure CN222309622U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of mold positioning, and in particular to a mold positioning mechanism for automobile plastic accessories. Background Art
[0002] Automotive plastic parts are product accessories made of plastic on cars. Plastic accessories are widely used in cars. In the production process of automotive plastic parts, molds are usually required for processing. The main function of the automotive plastic parts mold positioning mechanism is to ensure that the plastic parts mold can be accurately and stably positioned during the production process to facilitate the injection molding process.
[0003] At the same time, the bumper thick sheet in the automobile plastic accessories has a curved porous structure and can be produced using the existing side demolding mold. However, when demolding, the left and right sides and the lower mold are demolded at the same time, causing the molded part to lose all supporting force at the same time and easily deform. In addition, the contact area between the mold core pulling position and the molded part is relatively fragile, and the acceleration during demolding is large and there is no buffer, which can easily cause scratches or defects on the surface of the molded part, and even deform the holes of the molded part. Utility Model Content
[0004] The utility model provides a positioning mechanism for a mold of an automobile plastic part, which solves the problem in the related art that when a mold with lateral demoulding is used, the demoulding speeds of the left and right sides and the bottom are too fast, resulting in scratches or flaws on the surface of the molded part, and even deformation of the holes of the molded part.
[0005] The technical solution of the utility model is as follows: A mold positioning mechanism for an automobile plastic accessory, comprising an upper positioning member, a lower positioning member and two sliding assemblies, wherein the upper positioning member and the lower positioning member are fixedly connected by a plunger, the upper positioning member comprises an injection port, each of the sliding assemblies comprises an upper connecting member and a side mold, the upper connecting member is fixedly connected to the upper positioning member, the side mold is slidingly connected to the upper positioning member, an inclined hole is provided in the side mold, the inclined hole is inclined from top to bottom toward the injection port, a buffer groove is provided on one side of the wall of each inclined hole away from the injection port, an elastic device is provided in the buffer groove, and the elastic device comprises a buffer member that can move relative to the inner wall of the buffer groove.
[0006] Furthermore, the upper connecting member is fixedly connected to the upper mold, the lower positioning member includes an inclined column, a buffer assembly, a base and a support seat, the buffer assembly is slidably connected to the support seat, the buffer assembly includes an upper fixing member, a lower fixing member and a plurality of buffer columns, the lower fixing member is fixedly connected to the lower mold, and the lower fixing member is fixedly connected to the telescopic shaft.
[0007] Furthermore, the inclined column and the inclined hole have the same inclination angle, the upper fixing member and the lower fixing member are provided with straight holes, the upper half of the inclined column is threadedly connected to the base, and the lower half of the inclined column is located in the straight hole of the lower fixing member.
[0008] Furthermore, the elastic device includes a plurality of deceleration springs, one end of each of the deceleration springs is fixedly connected to a side wall of the buffer groove away from the injection port, and the other end of each of the deceleration springs is fixedly connected to the buffer member.
[0009] Furthermore, a countersunk hole is provided on the lower fixing member, a through hole is provided between the countersunk hole and the top surface of the upper fixing member, the buffer column passes through the through hole and the countersunk hole and is threadedly connected to the base, the buffer column sleeve is provided with a buffer spring, and the two ends of the buffer spring are respectively fixedly connected to the top surface of the countersunk hole and the top surface of the base.
[0010] Furthermore, the fit between the buffer column and the through hole is a clearance fit, the cross-sections of the through hole and the countersunk hole are both circular, and the diameter of the countersunk hole is not less than the diameter of the through hole.
[0011] Furthermore, the bottom of the elastic device and the inclined hole are both chamfered.
[0012] The working principle and beneficial effects of the utility model are as follows: the buffer spring and the elastic device are arranged in the utility model so that the left and right sides and the lower side can be buffered during demolding, so that the initial acceleration of the mold during demolding is reduced, thereby slowly increasing the demolding speed and reducing the wear on the molded parts caused by excessive demolding speed and force. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.
[0014] Figure 1 This is a schematic diagram of the overall structure of this embodiment;
[0015] Figure 2 This is a schematic diagram of the top view of the structure of this embodiment;
[0016] Figure 3 for Figure 2 AA cross-sectional structure diagram;
[0017] Figure 4 for Figure 2 Schematic diagram of the BB cross-section structure.
[0018] In the figure: 1. upper positioning member; 2. lower positioning member; 3. upper connecting member; 4. side mold; 5. inclined hole; 6. elastic device; 7. inclined column; 8. buffer assembly; 9. injection port; 10. upper mold; 11. base; 12. support seat; 13. upper fixing member; 14. lower fixing member; 15. buffer column; 16. lower mold; 17. buffer spring; 18. telescopic shaft; 19. countersunk hole; 20. buffer groove; 21. through hole; 22. buffer member; 23. deceleration spring. DETAILED DESCRIPTION
[0019] The following will be combined with the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0020] like Figure 1-2 As shown, this embodiment proposes a mold positioning mechanism for an automobile plastic accessory, including an upper positioning member 1, a lower positioning member 2 and two sliding assemblies. The upper positioning member 1 and the lower positioning member 2 are fixedly connected by a plunger. An injection port 9 is fixedly provided at the center of the upper positioning member 1. Two sliding assemblies are symmetrically arranged on both sides of the injection port 9. The sliding assembly includes an upper connecting member 3 and a side mold 4.
[0021] like Figure 3-4 As shown, the upper positioning member 1 is fixedly connected to the upper connecting member 3 by bolts, and the two side molds 4 are slidingly connected to the corresponding upper positioning member 1. The two side molds 4 are provided with inclined holes 5, and the inclined holes 5 are inclined from top to bottom toward the injection port 9. The part of the inclined hole 5 close to the lower positioning member 2 is close to the injection port 9, and the part of the inclined hole 5 away from the lower positioning member 2 is away from the injection port 9.
[0022] A buffer groove 20 is provided on one side of the wall away from the injection port 9 in each inclined hole 5, and an elastic device 6 is provided in the buffer groove 20. The elastic device 6 includes a buffer member 22 and a plurality of deceleration springs 23. The buffer member 22 can be displaced relative to the inner wall of the buffer groove 20. One end of each deceleration spring 23 is fixedly connected to the wall of the buffer groove 20 away from the injection port 9, and the other end of each deceleration spring 23 is fixedly connected to the buffer member 22, so that the buffer member 22 is compressed to move in the direction away from the injection port 9 after being subjected to force. The upper connecting member 3 is fixedly connected to the upper mold 10, and different upper molds 10 can be replaced according to the shape of the molded part.
[0023] The lower positioning member 2 includes a base 11, a support seat 12 and a buffer assembly 8. The base 11 and the support seat 12 are fixedly connected by bolts. The buffer assembly 8 is slidably connected to the support seat 12. The buffer assembly 8 includes an upper fixing member 13, a lower fixing member 14 and a plurality of buffer columns 15. The lower fixing member 14 is fixedly connected to a lower mold 16. The lower mold 16 cooperates with the upper mold 10 to form the shape of the molded part, thereby performing injection molding production.
[0024] A countersunk hole 19 is provided on the lower fixing member 14, and a through hole 21 is provided between the countersunk hole 19 and the upper fixing member 13, the countersunk hole 19 and the through hole 21 are connected, the through hole 21 and the countersunk hole 19 are both circular holes, the cross-sections of the through hole 21 and the countersunk hole 19 are both circular, the diameter of the countersunk hole 19 is slightly larger than the diameter of the through hole 21, the buffer column 15 is threadedly connected to the base 11 after passing through the through hole 21 and the countersunk hole 19, and a countersunk hole is provided on the top surface of the base 11, the countersunk hole of the base 11 is a circular hole, and the central axis coincides with the central axis of the countersunk hole 19, the buffer column 15 is sleeved with a buffer spring 17, and the two ends of the buffer spring 17 are respectively fixedly connected to the top surface of the countersunk hole 19 and the bottom surface of the countersunk hole of the base 11, so that relative displacement can occur between the buffer assembly 8 and the base 11, and the lower fixing member 14 is fixedly connected to a telescopic shaft 18, and the telescopic shaft 18 is connected to the external transmission to assist the movement of the buffer assembly 8.
[0025] The fit between the buffer column 15 and the through hole 21 as well as the buffer column 15 and the countersunk hole 19 are all clearance fits, so that each buffer column 15 can slide up and down smoothly. There is a certain distance between each buffer column 15 and the side of the side mold 4 away from the injection port 9. After the mold is closed, it is ensured that the buffer column 15 does not collide with the side mold 4.
[0026] The inclined column 7 has the same inclination angle as the inclined hole 5, and has the same cross-sectional shape as the inclined hole 5, so that the inclined column 7 can move upward and enter the inclined hole 5, thereby transmitting horizontal force to the side mold 4, thereby realizing horizontal movement of the side mold 4. Straight holes are provided on the upper fixing member 13 and the lower fixing member 14. The upper half of the inclined column 7 is threadedly connected to the base 11 to realize the fixation of the inclined column 7. The lower half of the inclined column 7 is in the straight holes of the upper fixing member 13 and the lower fixing member 14, so that after the upper fixing member 13 contacts the bottom surface of the side mold 4 and cannot move, the base 11 can still drive the inclined column 7 to move upward and enter the inclined hole 5. The bottom of the buffer 22 and the inclined hole 5 are both chamfered, so that the inclined column 7 can still smoothly enter the inclined hole 5 with a slight deviation.
[0027] In this embodiment, when the mold is closed, the plunger drives the support seat 12 and the base 11 to move upward and close to the upper positioning member 1, and drives the telescopic shaft 18 to move. After the telescopic shaft 18 moves to the bottom, the upper fixing member 13 is close to the side mold 4. At this time, the base 11 continues to move upward, compressing each buffer spring 17, so that the distance between the lower fixing member 14 and the base 11 is reduced, and drives the inclined column 7 to continue to move upward into the inclined hole 5, thereby bringing pressure to the inclined hole, pushing the side mold 4 to move toward the injection port 9, and after the plunger moves to the bottom, the mold closing is completed.
[0028] At this time, injection molding is carried out through the injection molding port 9. After the injection molding is completed, the molded part is supported by the lower mold 16 and the two side molds 4. At this time, the plunger returns to motion. First, the telescopic shaft 18 is locked, and the buffer assembly 8 is fixed to maintain support for the molded part, while the base 11 moves downward. At this time, the inclined column 7 squeezes the elastic device 6, and has a large acceleration for a moment of downward movement, driving each inclined column 7 to disengage from the inclined hole 5. At this time, the deceleration spring 23 is squeezed to provide buffering, reducing the acceleration of the downward movement, so that the speed of the two side molds 4 moving away from the injection molding port 9 slowly increases, avoiding the side mold 4 from being demolded quickly and causing wear to the molded part. After the inclined column 7 is completely out of the inclined hole 5, the telescopic shaft 18 is unlocked, and the molded part follows the lower mold 16 to return to the initial state, and the initial acceleration is reduced by the reaction force of the buffer spring 17, avoiding the lower positioning member 2 from being demolded quickly and causing wear to the molded part. At this time, removing the molded part completes the demolding.
[0029] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A mold positioning mechanism for automobile plastic parts, comprising an upper positioning member (1), a lower positioning member (2) and two sliding assemblies, wherein the upper positioning member (1) and the lower positioning member (2) are fixedly connected by a plunger, the upper positioning member (1) comprises an injection port (9), and each of the sliding assemblies comprises an upper connecting member (3) and a side mold (4), characterized in that: The upper connecting member (3) is fixedly connected to the upper positioning member (1); the side mold (4) is slidably connected to the upper positioning member (1); an inclined hole (5) is provided in the side mold (4); the inclined hole (5) is inclined from top to bottom toward the injection port (9); a buffer groove (20) is provided on the side of the wall away from the injection port (9) in each of the inclined holes (5); an elastic device (6) is provided in the buffer groove (20); the elastic device (6) includes a buffer member (22) that can move relative to the inner wall of the buffer groove (20); the elastic device (6) includes a plurality of deceleration springs (23); one end of each of the deceleration springs (23) is fixedly connected to the wall of the buffer groove (20) away from the injection port (9); the other end of each of the deceleration springs (23) is fixedly connected to the buffer member (22); the upper connecting member (3) is fixedly connected to the upper mold (10); The lower positioning member (2) comprises an inclined column (7), a buffer assembly (8), a base (11) and a support seat (12); the buffer assembly (8) is slidably connected to the support seat (12); the buffer assembly (8) comprises an upper fixing member (13), a lower fixing member (14) and a plurality of buffer columns (15); the lower fixing member (14) is fixedly connected to a lower mold (16); the lower fixing member (14) is fixedly connected to a telescopic shaft (18); a countersunk hole (19) is provided on the lower fixing member (14); a through hole (21) is provided between the countersunk hole (19) and the top surface of the upper fixing member (13); the buffer column (15) penetrates the through hole (21) and the countersunk hole (19) and is then threadedly connected to the base (11); the buffer column (15) is sleeved with a buffer spring (17); two ends of the buffer spring (17) are respectively fixedly connected to the top surface of the countersunk hole (19) and the top surface of the base (11).
2. The automotive plastic parts mold positioning mechanism according to claim 1, characterized in that: The inclined column (7) and the inclined hole (5) have the same inclination angle, and straight holes are provided on the upper fixing member (13) and the lower fixing member (14). The upper half of the inclined column (7) is threadedly connected to the base (11), and the lower half of the inclined column (7) is located in the straight hole of the lower fixing member (14).
3. The automotive plastic parts mold positioning mechanism according to claim 1, characterized in that: The buffer column (15) and the through hole (21) are fitted with clearance, the cross sections of the through hole (21) and the countersunk hole (19) are both circular, and the diameter of the countersunk hole (19) is not less than the diameter of the through hole (21).
4. The automotive plastic parts mold positioning mechanism according to claim 1, characterized in that: The bottom of the elastic device (6) and the inclined hole (5) are both provided with chamfers.