A secondary ejection forced demoulding device
By designing a secondary ejection forced mold release device, using structures such as ejector plate, guide column and ejector rod, the secondary ejection and smooth mold release of the inner circumferential ring buckle product is solved, and the problem of difficult product removal in the prior art is saved, which saves production time and reduces costs.
Patent Information
- Application Number
- CN202421416319.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-20
- Publication Date
- 2025-04-11
- Estimated Expiration
- 2034-06-20
AI Technical Summary
In plastic molds, it is difficult to remove the inner circumferential ring position product smoothly, which often leads to problems such as sticking mold, thrust pin top height, top through, top deformation, etc., which in turn damages the product.
A secondary ejection force release device is designed. Through the structure of the thimble plate and the movable sleeve arranged on the guide column, combined with the synergistic effect of the ejection rod, ejection block, ejection needle and return needle, the secondary ejection and smooth release of the product can be achieved.
Through the secondary ejection, the device can be successfully demolded with the inner circumferential ring buckle product, with reasonable design, compact structure, convenient operation, saving production cycle time, reducing mold production cost, and strong practicality.
Smart Images
Figure CN222741904U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of molds, in particular to a secondary ejection forced demoulding device. Background Art
[0002] In plastic molds, there are many products with inner circumferential buckle positions. The space is small, it is not easy to demold, and it is difficult to eject. It is easy to deform when ejected. In general, in order to meet the ejection requirements, the mold is ejected by using an ejector pin. However, this conventional practice often leads to problems such as mold sticking, ejector pin high, ejector penetration, and ejector deformation, which in turn causes product damage. Utility Model Content
[0003] The utility model aims to provide a secondary ejection forced demoulding device, which can demould the inner circumferential ring buckle product smoothly through secondary ejection, has reasonable design, compact structure, convenient operation, saves production cycle time, reduces mold production cost, and has strong practicality.
[0004] In order to achieve the above purpose, the following technical solutions are adopted:
[0005] A secondary ejection forced demoulding device comprises a first ejector plate, a second ejector plate, a third ejector plate and a fourth ejector plate which are stacked in sequence from bottom to top; a guide column is also installed on the second ejector plate, and the third ejector plate and the fourth ejector plate are movably sleeved on the guide column; a first fixing seat is also arranged above the fourth ejector plate, and a rear mold core is also installed in the first fixing seat; an ejector rod is also installed on the first ejector plate, and one end of the ejector rod is movably passed through the second ejector plate, the third ejector plate and the fourth ejector plate in sequence and then inserted into the rear mold core for arrangement; The outer wall of one end of the ejector rod inserted into the rear mold core is also movably sleeved with an ejector block, and a clamping position for molding the product is also opened at the top of the rear mold core and the corresponding position of the ejector rod and the ejector block; the second ejector plate is also equipped with a first ejector pin, and one end of the first ejector pin is movably inserted into the rear mold core and abuts against the bottom of the ejector block after passing through the third ejector plate, the fourth ejector plate and the first fixed seat in sequence; the fourth ejector plate is also equipped with a second ejector pin, and one end of the second ejector pin is movably inserted into the first fixed seat and the ejector block and then extends toward the bottom direction of the product.
[0006] Furthermore, the ejector block is of T-shaped structure, the T-shaped vertical end of the ejector block is movably sleeved on the outer wall of the ejector rod, and the T-shaped vertical end of the ejector block is arranged in the direction of the locking position; a first cavity with an opening at the bottom is also provided in the rear mold core, and the two transverse ends of the T-shape of the ejector block are arranged in the first cavity; one end of the first ejector pin is movably inserted into the rear mold core and abuts against the bottom of the T-shaped transverse end of the ejector block.
[0007] Furthermore, return pins are installed at the tops of both horizontal ends of the T-shape of the top block; a return hole that passes through the first cavity is opened at the top of the rear mold core corresponding to the return pin; and the return pin is inserted into the return hole.
[0008] Furthermore, a stop block connected to the rear mold core is arranged at each end of the opening of the first cavity, and stop notches are opened at the ends of the two horizontal ends of the T-shape of the top block corresponding to the stop blocks; a part of each stop block extends into a stop notch.
[0009] Furthermore, avoidance holes are provided on both horizontal ends of the T-shape of the ejector block, and one end of the second ejector pin is movably arranged through the avoidance hole.
[0010] By adopting the above scheme, the beneficial effects of the utility model are:
[0011] The device can demould the inner circumference buckle product smoothly by means of secondary ejection. It has reasonable design, compact structure, convenient operation, saves production cycle time, reduces mold production cost, and is highly practical. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 It is a structural schematic diagram of the utility model;
[0013] Figure 2 for Figure 1 A schematic diagram of the structure from another perspective without the first fixing seat;
[0014] Figure 3 It is a cross-sectional view of the utility model;
[0015] The accompanying drawings illustrate:
[0016] 1. First ejector plate; 2. Second ejector plate; 3. Third ejector plate; 4. Fourth ejector plate; 5. First fixed seat; 6. Rear mold core; 21. Guide column; 11. Ejector rod; 12. Ejector block; 13. First ejector; 14. Second ejector; 15. Return pin; 16. Stop block; 61. First cavity. DETAILED DESCRIPTION
[0017] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0018] Reference Figures 1 to 3As shown, the utility model provides a secondary ejection forced demoulding device, in one embodiment, comprising a first ejector plate 1, a second ejector plate 2, a third ejector plate 3, and a fourth ejector plate 4 stacked in sequence from bottom to top; a guide column 21 is also installed on the second ejector plate 2, and the third ejector plate 3 and the fourth ejector plate 4 are movably sleeved on the guide column 21; a first fixed seat 5 is also arranged above the fourth ejector plate 4, and a rear mold core 6 is also installed in the first fixed seat 5; an ejector rod 11 is also installed on the first ejector plate 1, and one end of the ejector rod 11 is movably passed through the second ejector plate 2, the third ejector plate 3, and the fourth ejector plate 4 in sequence and then inserted into the rear mold The outer wall of one end of the ejector pin 11 inserted into the rear mold core 6 is also movably sleeved with an ejector block 12, and a clamping position for molding the product is also opened at the top of the rear mold core 6 corresponding to the ejector pin 11 and the ejector block 12; a first ejector pin 13 is also installed on the second ejector plate 2, and one end of the first ejector pin 13 is movably inserted into the rear mold core 6 and abuts against the bottom of the ejector block 12 after passing through the third ejector plate 3, the fourth ejector plate 4, and the first fixed seat 5 in sequence; a second ejector pin 14 is also installed on the fourth ejector plate 4, and one end of the second ejector pin 14 is movably inserted into the first fixed seat 5 and the ejector block 12 and then extends toward the bottom direction of the product.
[0019] Continue to refer to Figures 1 to 3 As shown, in this embodiment, there are two guide posts 21, which are arranged at both ends of the second ejector plate 2 respectively. The third ejector plate 3 and the fourth ejector plate 4 can slide relative to the guide posts 21. Two groups of guide posts 21 are provided to ensure the sliding stability of the third ejector plate 3 and the fourth ejector plate 4. The number of the first ejector pins 13 and the second ejector pins 14 can be set according to actual use requirements, and there is no restriction on this. In this embodiment, one end of a plurality of second ejector pins 14 is arranged at intervals in the circumferential direction below the product, so that the product can be uniformly stressed when ejecting the product. When working, first the second ejector plate 2 and the third ejector plate 3 and the fourth ejector plate 4 move upward at the same time, and then the first ejector 13 pushes the ejector block 12 to move upward. When the ejector block 12 moves upward, the product is lifted to separate the product from the rear mold core 6 (the product is located on the ejector block 12 at this time). Subsequently, the third ejector plate 3 and the fourth ejector plate 4 move upward again, and then the second ejector 14 lifts the product to separate the product from the ejector block 12 to complete demoulding. In this embodiment, the inner circumference buckle product can be smoothly demoulded by the secondary ejection method. It has reasonable design, compact structure, convenient operation, saves production cycle time, reduces mold manufacturing production cost, and has strong practicality.
[0020] In one embodiment, the ejector block 12 is T-shaped, and the T-shaped vertical end of the ejector block 12 is movably sleeved on the outer wall of the ejector rod 11, and the T-shaped vertical end of the ejector block 12 is arranged in the direction of the locking position; the rear mold core 6 is also provided with a first cavity 61 with an opening at the bottom, and the two transverse ends of the T-shaped ejector block 12 are arranged in the first cavity 61; the first ejector pin 13 is movably inserted into one end of the rear mold core 6 and abuts against the bottom of the T-shaped transverse end of the ejector block 12. The first ejector pin 13 applies a thrust to the bottom of the T-shaped transverse end of the ejector block 12 to push the ejector block 12 to slide, and at the same time, the top of the two transverse ends of the T-shaped ejector block 12 is also installed with a return pin 15; the top of the rear mold core 6 is also provided with a return hole that passes through the first cavity 61 at the corresponding position of the return pin 15; the return pin 15 is inserted in the return hole. After the product is demolded, the ejector block 12 can be quickly reset by the return pin 15.
[0021] In one embodiment, a stop block 16 connected to the rear mold core 6 is arranged at each end of the opening of the first cavity 61, and a stop notch is provided at the ends of the two transverse ends of the T-shaped top block 12 corresponding to the stop block 16; a portion of each stop block 16 extends into a stop notch. When the top block 12 is reset, its travel can be limited by the stop block 16 to prevent it from falling from the first cavity 61. At the same time, avoidance holes are provided on the two transverse ends of the T-shaped top block 12, and one end of the second ejector pin 14 is movably arranged through the avoidance hole, which can improve the compactness of the overall structure of the device.
[0022] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A secondary ejection forced demoulding device, characterized in that: The invention comprises a first ejector plate, a second ejector plate, a third ejector plate and a fourth ejector plate which are stacked in sequence from bottom to top; a guide column is also installed on the second ejector plate, and the third ejector plate and the fourth ejector plate are movably sleeved on the guide column; a first fixing seat is also arranged above the fourth ejector plate, and a rear mold core is also installed in the first fixing seat; an ejector rod is also installed on the first ejector plate, and one end of the ejector rod is movably passed through the second ejector plate, the third ejector plate and the fourth ejector plate in sequence and then inserted into the rear mold core for arrangement; the ejector rod is inserted into An ejector block is movably sleeved on the outer wall of one end of the rear mold core, and a clamping position for molding the product is provided at the top of the rear mold core corresponding to the ejector rod and the ejector block; a first ejector is also installed on the second ejector plate, and one end of the first ejector moves through the third ejector plate, the fourth ejector plate, and the first fixed seat in sequence, and then is movably inserted into the rear mold core and abuts against the bottom of the ejector block; a second ejector is also installed on the fourth ejector plate, and one end of the second ejector moves through the first fixed seat and the ejector block and then extends toward the bottom direction of the product.
2. The secondary ejection forced demoulding device according to claim 1, characterized in that: The ejector block is of T-shaped structure, and the T-shaped vertical end of the ejector block is movably sleeved on the outer wall of the ejector rod, and the T-shaped vertical end of the ejector block is arranged in the direction of the locking position; a first cavity with an opening at the bottom is also provided in the rear mold core, and the two transverse ends of the T-shape of the ejector block are arranged in the first cavity; one end of the first ejector pin is movably inserted into the rear mold core and abuts against the bottom of the T-shaped transverse end of the ejector block.
3. The secondary ejection forced demoulding device according to claim 2, characterized in that: The tops of the two horizontal ends of the T-shape of the top block are also equipped with return pins; the top of the rear mold core and the corresponding position of the return pin are also provided with a return hole that passes through the first cavity; the return pin is inserted into the return hole.
4. The secondary ejection forced demoulding device according to claim 3, characterized in that: A stop block connected to the rear mold core is arranged at each end of the opening of the first cavity, and stop notches are opened at the ends of the two horizontal ends of the T-shape of the top block corresponding to the stop blocks; a part of each stop block extends into a stop notch.
5. The secondary ejection forced demoulding device according to claim 2, characterized in that: The two horizontal ends of the T-shaped ejector block are also provided with avoidance holes, and one end of the second ejector pin is movably arranged through the avoidance hole.