Rear mold forced demolding abdicating mechanism

Abstract

The utility model discloses a rear mold forced release abdicating mechanism which comprises a lower mold, an upper mold is arranged above the lower mold, lower pressing rods are fixedly connected to the two sides of the lower end face of the upper mold, a first rectangular pushing block located in the lower mold is arranged on one side of each lower pressing rod, and a second rectangular pushing block located in the lower mold is arranged on the other side of each lower pressing rod. The faces, facing the lower pressing rod, of the first rectangular pushing blocks are first inclined faces, and the opposite faces of the two first rectangular pushing blocks are each connected with a first strong spring. A first upper push rod is fixedly arranged on the lower end face of the first rectangular push block. When the injection mold is used for demolding operation, the lower half injection molding groove can be moved downwards to release part of contact between the injection molding groove and a demolding finished product under the condition that the original upward thrust applied to the demolding product is reserved, so that the groove friction force or extrusion force between the demolding product and the injection molding groove during demolding operation is reduced, and the demolding quality is improved. Deformation of the demoulded product due to demoulding operation is prevented.

Description

Technical Field

[0001] This utility model relates to the field of mold technology, specifically to a rear mold forced release and relief mechanism. Background Technology

[0002] The rear mold forced release clearance mechanism is a special structure in mold design, mainly used to deal with the parts of the product that are difficult to demold directly during the demolding process;

[0003] The rear mold forced demolding clearance mechanism refers to a forced demolding method adopted in mold design for structures such as undercuts, side glue positions, or side recesses on the product. It uses a special clearance structure on the mold to enable the product to overcome the interference between itself and the mold during demolding and smoothly eject it from the mold.

[0004] However, when using this type of rear mold strong release and relief mechanism, it may generate large friction or extrusion force on the demolded product, which may cause the demolded product to deform. Therefore, it does not meet the existing requirements. In response, we have proposed a rear mold strong release and relief mechanism. Utility Model Content

[0005] The purpose of this utility model is to provide a rear mold strong release and relief mechanism to solve the problems mentioned in the background art, such as the possibility of generating large friction or extrusion forces on the demolded product when using this kind of rear mold strong release and relief mechanism, which may cause the demolded product to deform.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a rear mold forced release and clearance mechanism, including a lower mold, an upper mold above the lower mold, a pressing rod fixedly connected to both sides of the lower end face of the upper mold, a first rectangular pushing block located inside the lower mold on one side of the pressing rod, the surface of the first rectangular pushing block facing the pressing rod being a first inclined surface, and a first strong spring connected to the opposite surfaces of the two first rectangular pushing blocks;

[0007] The lower end face of the first rectangular push block is fixedly provided with a first upper push rod, and the two faces of the first upper push rods are both second inclined surfaces. An injection mold is provided between the two second inclined surfaces. A lower half injection groove is provided in the middle position of the upper end face of the injection mold, and an upper half injection groove is provided above the lower half injection groove on the upper end face of the lower mold.

[0008] Both sides of the upper surface of the injection molding template are provided with a cylindrical storage groove. The interior of the cylindrical storage groove contains a second strong spring, and the upper surface of the second strong spring is connected to the interior of the lower mold.

[0009] A second rectangular push block is fixedly provided on one side of the lower end face of the first upper push rod, and a third rectangular push block is provided on one side of the second rectangular push block. The surface of the third rectangular push block facing the second rectangular push block is a third inclined surface.

[0010] The third rectangular push block is provided with a second upper push rod on one side, and the surface of the third rectangular push block facing the second upper push rod is a fourth inclined surface;

[0011] The two second upper push rods have opposing fifth inclined surfaces. A push rod is provided between the two fifth inclined surfaces. The push rod contains a spring groove inside. A metal ring is provided on the upper side inside the spring groove. A connecting rod is connected to the axis of the metal ring. The lower end face of the connecting rod is fixed to the inside of the lower mold. A spring is sleeved on the outer surface of the connecting rod. The upper and lower end faces of the spring are respectively connected to the lower end face of the metal ring and the inner wall of the spring groove.

[0012] Preferably, the front end face of the first third rectangular push block and the rear end face of the second third rectangular push block from left to right are slidably connected to the lower mold, and the two third inclined surfaces and the fourth inclined surfaces located on the outer surface of the third rectangular push block are respectively in contact with the second rectangular push block and the second upper push rod.

[0013] Preferably, the outer side of the top end of the push rod is provided with a storage groove located on the lower end face of the injection molding template, the outer surface of the push rod is in contact with the inner wall of the storage groove, and the push rod and the storage groove are slidably connected.

[0014] Preferably, the lower end face of the second upper push rod is slidably connected to the lower mold, and the fifth inclined surface located on the outer surface of the second upper push rod is in contact with the push rod.

[0015] Preferably, the outer side of the first strong spring is provided with a cylindrical groove located on the outer surface of the first rectangular push block, and the cylindrical groove is larger than the first strong spring.

[0016] Preferably, the upper mold has an injection port at the middle position of the upper end face, and the interior of the injection port is connected to the interior of the upper injection groove.

[0017] Preferably, the upper end face of the injection molding template is connected to the interior of the lower mold, and the lower half of the injection groove located on the upper end face of the injection molding template is connected to the upper half of the injection groove located on the upper end face of the lower mold.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] This invention allows for the simultaneous downward and upward movement of the injection molding template and push rod when the upper mold is moved upward after the injection molding operation is completed. As the injection molding template descends, the lower half of the injection groove located on the upper surface of the injection molding template gradually releases contact with the demolded product. Meanwhile, as the push rod rises, it applies an upward pushing force to the demolded product. Through this technical solution, during the demolding operation, the lower half of the injection groove can be moved downward to release part of the contact between the injection groove and the demolded product while maintaining the original upward pushing force applied to the demolded product. This reduces the groove friction or extrusion force between the demolded product and the injection groove during the demolding operation, preventing the demolded product from deforming due to the demolding operation. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a front view of the entire utility model;

[0022] Figure 3 This utility model Figure 2 Enlarged view of the structure at point A in the middle;

[0023] Figure 4 This utility model Figure 3 Enlarged view of the structure at point B.

[0024] In the diagram: 1. Lower mold; 2. Upper mold; 3. Upper injection groove; 4. Injection mold template; 5. Lower injection groove; 6. Lower pressure rod; 7. First rectangular push block; 8. First inclined surface; 9. First upper push rod; 10. Second inclined surface; 11. Second rectangular push block; 12. Third rectangular push block; 13. Third inclined surface; 14. Fourth inclined surface; 15. Second upper push rod; 16. Push rod; 17. Spring groove; 18. Connecting rod; 19. Spring; 20. First strong spring; 21. Metal ring; 22. Fifth inclined surface; 23. Second strong spring; 24. Cylindrical storage groove. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0026] The lower mold 1 (model 003), lower pressure rod 6 (model 304), and spring 19 (model JX110) mentioned in this utility model can be obtained from the market or through private customization.

[0027] Please see Figures 1 to 4An embodiment of this utility model is provided: a rear mold forced release and relief mechanism, including a lower mold 1, an upper mold 2 above the lower mold 1, a pressing rod 6 fixedly connected to both sides of the lower end face of the upper mold 2, a first rectangular pushing block 7 located inside the lower mold 1 on one side of the pressing rod 6, the surface of the first rectangular pushing block 7 facing the pressing rod 6 is a first inclined surface 8, and a first strong spring 20 is connected to the opposite surfaces of the two first rectangular pushing blocks 7.

[0028] The lower end face of the first rectangular push block 7 is fixedly provided with a first upper push rod 9. The two first upper push rods 9 face each other as a second inclined surface 10. An injection mold 4 is provided between the two second inclined surfaces 10. The middle position of the upper end face of the injection mold 4 is provided with a lower half injection groove 5. Above the lower half injection groove 5 is an upper half injection groove 3 located on the upper end face of the lower mold 1.

[0029] Both sides of the upper surface of the injection molding template 4 are provided with a cylindrical storage groove 24. The cylindrical storage groove 24 contains a second strong spring 23, and the upper surface of the second strong spring 23 is connected to the interior of the lower mold 1.

[0030] A second rectangular push block 11 is fixedly provided on one side of the lower end face of the first upper push rod 9, and a third rectangular push block 12 is provided on one side of the second rectangular push block 11. The surface of the third rectangular push block 12 facing the second rectangular push block 11 is a third inclined surface 13.

[0031] The third rectangular push block 12 has a second upper push rod 15 on one side, and the surface of the third rectangular push block 12 facing the second upper push rod 15 is a fourth inclined surface 14.

[0032] The two second upper push rods 15 face each other on a fifth inclined surface 22. A push rod 16 is provided between the two fifth inclined surfaces 22. The push rod 16 contains a spring groove 17 inside. A metal ring 21 is provided on the upper side inside the spring groove 17. A connecting rod 18 is connected to the axis of the metal ring 21. The lower end face of the connecting rod 18 is fixed to the interior of the lower mold 1. A spring 19 is sleeved on the outer surface of the connecting rod 18. The upper and lower end faces of the spring 19 are connected to the lower end face of the metal ring 21 and the inner wall of the spring groove 17, respectively.

[0033] An injection port is provided at the middle position of the upper end face of the upper mold 2, and the interior of the injection port is connected to the interior of the upper half injection groove 3; the upper end face of the injection template 4 is connected to the interior of the lower mold 1, and the lower half injection groove 5 located on the upper end face of the injection template 4 is connected to the upper half injection groove 3 located on the upper end face of the lower mold 1; when the equipment is needed, the upper mold 2 is moved downward to merge the upper mold 2 and the lower mold 1 together. As the upper mold 2 descends, the pressure rod 6 fixed on the lower end face of the upper mold 2 will contact the first inclined surface 8 located on the outer surface of the first rectangular push block 7 and push the first rectangular push block 7 outward.

[0034] When the first rectangular push block 7 is pushed outward, it will compress the first strong spring 20 connected to it;

[0035] As the first rectangular push block 7 moves, the first upper push rod 9 fixed therewith will move along with it. As the first upper push rod 9 moves, the second inclined surface 10 located on the outer surface of the first upper push rod 9 will contact the injection mold 4 and push the injection mold 4 upward. As the injection mold 4 rises, it will squeeze the second strong spring 23 inside the cylindrical storage groove 24 located on the upper end surface of the injection mold 4.

[0036] When the upper end face of the injection mold 4 is in contact with the interior of the lower mold 1, the lower half injection groove 5 located on the upper end face of the injection mold 4 will be connected with the upper half injection groove 3 to form a complete injection groove. At this time, the lower end face of the upper mold 2 will also be in contact with the upper end face of the lower mold 1. Then, the injection material is added into the interior of the upper half injection groove 3 and the lower half injection groove 5 through the injection port located on the upper end face of the upper mold 2. When the injection material inside the upper half injection groove 3 and the lower half injection groove 5 cools and solidifies to form a demolded product, the upper mold 2 is moved upward. With the rise of the upper mold 2 and the reaction force of the first strong spring 20 and the second strong spring 23 being squeezed, the injection mold 4 can be pushed downward during the process of pushing the first rectangular push block 7 outward. As the injection mold 4 descends, the contact between the lower half injection groove 5 and the demolded product will be released.

[0037] As the first rectangular push block 7 moves outward, the second rectangular push block 11, connected to it via the first upper push rod 9, will also move outward. With this movement, the second rectangular push block 11 will contact the third inclined surface 13 on the outer surface of the third rectangular push block 12, pushing the third rectangular push block 12 downward. As the third rectangular push block 12 descends, the fourth inclined surface 14 on its outer surface will contact the second upper push rod 15, pushing the second upper push rod 15 inward. With the movement of the second upper push rod 15, the fourth inclined surface 14 on its outer surface will contact the second upper push rod 15, pushing the second upper push rod 15 inward. The fifth inclined surface 22 on the outer surface of the rod 15 will contact the push rod 16 and push the push rod 16 upward. The push rod 16, which is pushed upward, can apply an upward force to the demolded product, thereby pushing it out of the upper half of the injection molded groove 3. With the above technical solution, when performing demolding, the lower half of the injection molded groove 5 can be moved downward while retaining the original upward force applied to the demolded product to release part of the contact between the injection molded groove and the demolded product. This reduces the groove friction or extrusion force between the demolded product and the injection molded groove during demolding, and prevents the demolded product from deforming due to the demolding operation.

[0038] As the push rod 16 is pushed upward, the distance between the lower end of the inner wall of the spring groove 17 inside the push rod 16 and the metal ring 21 will gradually decrease, thereby squeezing the spring 19 located between the two. When the demolded product is removed and the lower mold 1 and the upper mold 2 are reassembled, the push rod 16 can be pushed back to its original position by the reaction force of the squeezed spring 19.

[0039] The front end face of the first third rectangular push block 12 and the rear end face of the second third rectangular push block 12, from left to right, are slidably connected to the lower mold 1. The two third inclined surfaces 13 and the fourth inclined surfaces 14 on the outer surface of the third rectangular push block 12 are respectively in contact with the second rectangular push block 11 and the second upper push rod 15. Through the sliding structure between the third rectangular push block 12 and the lower mold 1, the stability of the pushed third rectangular push block 12 when it moves can be ensured.

[0040] The outer side of the top end of the push rod 16 is provided with a receiving groove located on the lower end face of the injection mold 4. The outer surface of the push rod 16 is in contact with the inner wall of the receiving groove, and the push rod 16 and the receiving groove are slidably connected. The receiving groove can ensure the sealing between the push rod 16 and the injection mold 4.

[0041] The lower end face of the second upper push rod 15 is slidably connected to the lower mold 1, and the fifth inclined surface 22 on the outer surface of the second upper push rod 15 is in contact with the push rod 16; through the sliding connection structure between the second upper push rod 15 and the lower mold 1, the stability of the pushed second upper push rod 15 can be ensured.

[0042] The outer side of the first strong spring 20 is provided with a cylindrical groove located on the outer surface of the first rectangular push block 7, and the cylindrical groove is larger than the first strong spring 20; this cylindrical groove can prevent the first strong spring 20 from tilting.

[0043] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A post mold knockout displacement mechanism comprising a lower mold (1), characterized by: The upper side of the lower mold (1) is provided with an upper mold (2), the lower end surface of the upper mold (2) is fixedly connected with a pressing rod (6) on both sides, one side of the pressing rod (6) is provided with a first rectangular push block (7) in the lower mold (1), the surface of the first rectangular push block (7) towards the pressing rod (6) is a first inclined surface (8), and the opposite surfaces of the two first rectangular push blocks (7) are connected with a first strong spring (20); The lower end surface of the first rectangular push block (7) is fixedly provided with a first push rod (9), the opposite surfaces of the two first push rods (9) are second inclined surfaces (10), and a injection mold plate (4) is arranged between the two second inclined surfaces (10), the middle position of the upper end surface of the injection mold plate (4) is provided with a lower half injection slot (5), and the upper side of the lower half injection slot (5) is provided with an upper half injection slot (3) located on the upper end surface of the lower mold (1); The upper end surface of the injection mold plate (4) is provided with a cylindrical receiving groove (24) on both sides, the inside of the cylindrical receiving groove (24) contains a second strong spring (23), and the upper end surface of the second strong spring (23) is connected with the inside of the lower mold (1); One side of the lower end surface of the first push rod (9) is fixedly provided with a second rectangular push block (11), one side of the second rectangular push block (11) is provided with a third rectangular push block (12), and the surface of the third rectangular push block (12) towards the second rectangular push block (11) is a third inclined surface (13); One side of the third rectangular push block (12) is provided with a second push rod (15), and the surface of the third rectangular push block (12) towards the second push rod (15) is a fourth inclined surface (14); The opposite surfaces of the two second push rods (15) are fifth inclined surfaces (22), and a push rod (16) is arranged between the two fifth inclined surfaces (22), the inside of the push rod (16) contains a spring groove (17), the upper side of the inside of the spring groove (17) is provided with a metal ring (21), the axis of the metal ring (21) is connected with a connecting rod (18), the lower end surface of the connecting rod (18) is fixedly connected with the inside of the lower mold (1), the outer surface of the connecting rod (18) is sleeved with a spring (19), and the upper and lower end surfaces of the spring (19) are connected with the lower end surface of the metal ring (21) and the inner wall of the spring groove (17) respectively.

2. A post mold knockout displacement mechanism according to claim 1, wherein: The front end surface of the first third rectangular push block (12) and the rear end surface of the second third rectangular push block (12) are slidably connected with the lower mold (1) from left to right, and the two third inclined surfaces (13) and fourth inclined surfaces (14) on the outer surface of the third rectangular push block (12) are respectively attached to the second rectangular push block (11) and the second push rod (15).

3. The mechanism according to claim 1, wherein: The outside of the top end of the push rod (16) is provided with a receiving groove located on the lower end surface of the injection mold plate (4), the outer surface of the push rod (16) is attached to the inner wall of the receiving groove, and the push rod (16) is slidably connected with the receiving groove.

4. The post mold stress relief displacement mechanism of claim 1, wherein: The lower end surface of the second push rod (15) is connected with the lower mold (1) through sliding, and the fifth inclined surface (22) on the outer surface of the second push rod (15) is attached between the push rod (16).

5. The post mold stress relief displacement mechanism of claim 1, wherein: The outer side of the first strong spring (20) is provided with a cylindrical groove on the outer surface of the first rectangular push block (7), and the cylindrical groove is larger than the first strong spring (20).

6. A post mold shake relief mechanism according to claim 1, wherein: The upper end surface of the upper mold (2) is provided with an injection port at the middle position, and the inside of the injection port is communicated with the inside of the upper half injection slot (3).

7. A post mold knockout displacement mechanism according to claim 1 wherein: The upper end surface of the injection mold plate (4) is connected with the inside of the lower mold (1), and the lower half injection slot (5) on the upper end surface of the injection mold plate (4) is connected with the upper half injection slot (3) on the upper end surface of the lower mold (1).

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