Replaceable mold ejector rod

Abstract

The utility model relates to the technical field of molds, and discloses a replaceable mold ejector rod which comprises a round rod body and a contact block, the top end of the round rod body is fixedly connected with a positioning block, the outer wall of the bottom of the contact block is fixedly connected with a connecting part, the connecting part is inserted into the outer wall of the positioning block, and the interior of the positioning block is of a hollow structure; a connecting mechanism used for fixing the contact block is mounted in the positioning block and comprises a mounting plate fixedly connected to the inner wall of the positioning block, a star-shaped rotating disc is arranged over the mounting plate, a plurality of limiting blocks are further welded to the outer wall of the top of the mounting plate, and clamping rods are slidably connected to the inner walls of the limiting blocks; the outer walls of the ends, located in the positioning blocks, of the multiple clamping rods are fixedly connected with fixing blocks, the outer walls of the tops, close to the multiple end portions, of the star-shaped rotating disc are provided with movable grooves, and the fixing blocks are movably connected to the inner walls of the movable grooves.

Description

Technical Field

[0001] This application relates to the field of mold technology, and in particular to a replaceable mold ejector pin. Background Technology

[0002] Molds refer to various tools used in industrial production to obtain the desired products through methods such as injection molding, blow molding, extrusion, die casting or forging, smelting, and stamping. When using molds, ejector pins need to be installed inside the mold to assist in the demolding process of the processed products, thus ensuring the demolding efficiency of the mold.

[0003] CN214866674U discloses "an ejector pin for an electronic connector stamping die, comprising a round pin and a bottom pin, wherein the bottom pin has an internal movable groove and a magnet is installed on the inner wall of the bottom cover". This utility model sets a limiting post inside the spring, and the diameter of the limiting post is slightly smaller than the inner diameter of the spring. A first limiting strip is installed on a part of the surface wall of the limiting post. The diameter of the limiting post is slightly smaller than the diameter of the inner groove, and the limiting post can move within the inner groove. In use, the limiting post limits the spring inside the spring, so that the elastic force of the round pin always remains vertically upward. When ejecting, the elastic angle of the spring will not tilt, thus ensuring that the round pin is ejected smoothly every time without getting stuck.

[0004] In the aforementioned patent, the contact head of the mold ejector rod is prone to wear due to frequent contact and friction with the molded product inside the mold during long-term, high-frequency use. When the contact head wears to a certain extent, it must be replaced to ensure product quality and normal production. However, the mold ejector rod in this application uses a threaded connection to fix the contact head and the ejector rod body. This connection method has many drawbacks in actual operation: on the one hand, the threaded connection requires continuous rotation to install and remove the contact head, which is cumbersome and time-consuming; on the other hand, in actual production scenarios, the mold ejector rod is often installed inside the equipment in a confined space, making operation extremely inconvenient. Installing and removing the threaded connection in such a limited space not only further increases the difficulty of operation and prolongs the operation time, but also requires a high level of technical skill and experience from the operator. Therefore, a replaceable mold ejector rod is proposed to solve the above problems. Utility Model Content

[0005] The purpose of this utility model is to provide a replaceable mold ejector pin to solve the problems of waste caused by the need to replace the entire mold ejector pin after the head wears down, and the cumbersome disassembly and assembly of the connection method.

[0006] The replaceable mold ejector pin provided in this application adopts the following technical solution:

[0007] A replaceable mold ejector pin includes a round rod body and a contact block. A positioning block is fixedly connected to the top of the round rod body, and a connecting part is fixedly connected to the bottom outer wall of the contact block. The connecting part is inserted into the outer wall of the positioning block. The positioning block has a hollow structure inside, and a connecting mechanism for fixing the contact block is installed inside.

[0008] The connecting mechanism includes a mounting plate fixedly connected to the inner wall of the positioning block. A star-shaped turntable is provided directly above the mounting plate. Multiple limiting blocks are welded to the top outer wall of the mounting plate. The inner walls of the multiple limiting blocks are slidably connected to locking rods. The ends of the multiple locking rods facing the positioning block penetrate through and extend out of the positioning block. The outer walls of the ends of the multiple locking rods located inside the positioning block are fixedly connected to fixing blocks. The top outer wall of the star-shaped turntable near the multiple ends has movable grooves. The fixing blocks are movably connected to the inner walls of the movable grooves.

[0009] Preferably, the outer wall of the connecting part is provided with a plurality of locking holes, and the plurality of locking holes correspond to one end of the plurality of locking rods located outside the positioning block and are adapted to be inserted into each other.

[0010] Preferably, the inside of the round rod body is equipped with a linkage unlocking mechanism for driving multiple locking rods to quickly retract into the interior of the positioning block. The mechanism includes a rotating shaft rotatably connected inside the round rod body. The top end of the rotating shaft extends into the interior of the positioning block and passes through the mounting plate and is fixedly connected to the middle outer wall of the star-shaped turntable. A ring is fixedly connected to the top outer wall of the mounting plate, and the rotating shaft is located inside the ring. A spring is fixedly connected between the ring and the rotating shaft.

[0011] Preferably, the linkage unlocking mechanism further includes a rotating part, which is fixedly connected to the rotating shaft via two connecting rods. The outer wall of the round rod body is provided with an annular mounting groove, and the rotating part is rotatably connected to the inner wall of the annular mounting groove. The interior of the round rod body is provided with two sector-shaped grooves, which are connected to the annular mounting groove. The two connecting rods are respectively movably connected to the inner walls of the two sector-shaped grooves.

[0012] Preferably, the annular mounting groove is rolledly connected to the upper and lower outer walls of the rotating part with a plurality of balls, and the plurality of balls are evenly distributed in a circumferential array with equal spacing.

[0013] In summary, this application includes the following beneficial technical effects:

[0014] 1. This replaceable mold ejector pin abandons the traditional threaded connection method. Through the ingenious design of the connection mechanism and the linkage unlocking mechanism, it realizes the quick installation and removal of the contact block. When it is necessary to replace the worn contact block, simply rotate the rotating part manually. Through the linkage of the connecting rod, the rotating shaft and other components, the locking rod can quickly retract into the positioning block, disengage from the locking hole, and the contact block can be easily pulled out. There is no need for tedious continuous rotation operations, which greatly saves replacement time, significantly improves replacement efficiency, effectively reduces production downtime caused by ejector pin replacement, and meets the requirements of high-efficiency production.

[0015] 2. Since it does not require multiple rotations like threaded connections, the replacement of this ejector pin is not limited by space, even if the mold ejector pin is installed in a small space inside the equipment. The difficulty of operation is greatly reduced, and there are no longer high requirements for the operator's technical level and operating experience. Ordinary operators can easily complete the replacement of the contact block, which greatly improves the convenience and feasibility of operation. Attached Figure Description

[0016] Figure 1 This is an overall schematic diagram of an embodiment of the application;

[0017] Figure 2 This is an exploded view of an embodiment of the application;

[0018] Figure 3 This is an internal schematic diagram of the positioning block in the embodiment of the application;

[0019] Figure 4 This is a partial exploded view of the structure of an embodiment of the application;

[0020] Figure 5 It is a cross-sectional view of embodiment 1 in the application.

[0021] Explanation of reference numerals in the attached drawings: 1. Round rod body; 2. Contact block; 3. Positioning block; 4. Connecting part; 5. Locking rod; 6. Locking hole; 7. Mounting plate; 8. Limiting block; 9. Fixing block; 10. Star-shaped turntable; 11. Movable groove; 12. Rotating shaft; 13. Ring; 14. Spring; 15. Annular mounting groove; 16. Rotating part; 17. Ball bearing; 18. Sector groove; 19. Connecting rod. Detailed Implementation

[0022] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0023] This application discloses a replaceable mold ejector pin. (Refer to...) Figure 1-5A replaceable mold ejector pin includes a round rod body 1 and a contact block 2. A positioning block 3 is fixedly connected to the top of the round rod body 1, and a connecting part 4 is fixedly connected to the bottom outer wall of the contact block 2. The connecting part 4 is inserted into the outer wall of the positioning block 3. The interior of the positioning block 3 is a hollow structure, and a connecting mechanism for fixing the contact block 2 is installed inside it.

[0024] The connecting mechanism includes a mounting plate 7 fixedly connected to the inner wall of the positioning block 3. A star-shaped turntable 10 is provided directly above the mounting plate 7. Multiple limiting blocks 8 are welded to the top outer wall of the mounting plate 7. A locking rod 5 is slidably connected to the inner wall of the multiple limiting blocks 8. The multiple locking rods 5 pass through and extend out of the positioning block 3 at one end facing the positioning block 3. A fixing block 9 is fixedly connected to the outer wall of the end of the multiple locking rods 5 located inside the positioning block 3. An movable groove 11 is opened on the top outer wall of the star-shaped turntable 10 near the end of the multiple fixing blocks 9. The fixing block 9 is movably connected to the inner wall of the movable groove 11.

[0025] The outer wall of the connecting part 4 has multiple locking holes 6, which correspond to the ends of multiple locking rods 5 located outside the positioning block 3 and are compatible for insertion. When the contact block 2 needs to be installed, the connecting part 4 is inserted into the positioning block 3. During the insertion process, the outer wall of the connecting part 4 will push the locking rod 5 to slide into the positioning block 3, and the fixing block 9 will slide in the movable groove 11. At the same time, the star-shaped turntable 10 will rotate to a certain extent. When the connecting part 4 is fully inserted, the locking rod 5 is just aligned with the locking hole 6. Under the subsequent reset action (such as the reset action of the spring 14, which will be explained in detail in the subsequent linkage unlocking mechanism), the locking rod 5 is inserted into the locking hole 6, realizing the fixed connection between the contact block 2 and the round rod body 1.

[0026] The main body 1 of the round rod is equipped with a linkage unlocking mechanism, which is used to drive multiple locking rods 5 to quickly retract into the interior of the positioning block 3. The linkage unlocking mechanism includes a rotating shaft 12 rotatably connected inside the main body 1 of the round rod. The top end of the rotating shaft 12 extends into the interior of the positioning block 3 and passes through the mounting plate 7 and is fixedly connected to the middle outer wall of the star-shaped turntable 10. A ring 13 is fixedly connected to the top outer wall of the mounting plate 7. The rotating shaft 12 is located inside the ring 13. A spring 14 is fixedly connected between the ring 13 and the rotating shaft 12.

[0027] The linkage unlocking mechanism also includes a rotating part 16, which is fixedly connected to the rotating shaft 12 via two connecting rods 19. An annular mounting groove 15 is provided on the outer wall of the round rod body 1, and the rotating part 16 is rotatably connected to the inner wall of the annular mounting groove 15. Two sector grooves 18 are provided inside the round rod body 1, and the two sector grooves 18 are connected to the annular mounting groove 15. The two connecting rods 19 are respectively movably connected to the inner walls of the two sector grooves 18. Multiple balls 17 are rolledly connected to the upper and lower outer walls of the annular mounting groove 15 and the rotating part 16. The multiple balls 17 are evenly distributed in a circumferential array at equal intervals. The arrangement of the balls 17 can reduce the friction when the rotating part 16 rotates, making the operation smoother.

[0028] The design of the sector groove 18 and the connecting rod 19 is an important part of the linkage unlocking mechanism to achieve stable and effective operation. During the linkage unlocking process, when the rotating part 16 is manually rotated, the rotating part 16 will rotate around the central axis of the annular mounting groove 15. Since the rotating part 16 is fixedly connected to the rotating shaft 12 through two connecting rods 19, and the two connecting rods 19 are respectively movably connected to the inner walls of the two sector grooves 18, the rotation of the rotating part 16 will drive the connecting rods 19 to move within the sector grooves 18.

[0029] The shape and angle of the sector groove 18 can be designed according to actual needs. Its curvature and length determine the range of movement of the connecting rod 19, thereby controlling the rotation angle of the rotating shaft 12. When the connecting rod 19 moves in the sector groove 18, it will drive the rotating shaft 12 to rotate synchronously. Because the rotating shaft 12 is fixedly connected to the star-shaped turntable 10, the star-shaped turntable 10 will also rotate accordingly, thereby realizing the control of the locking rod 5, causing the locking rod 5 to retract into the positioning block 3 and disengage from the locking hole 6, thus achieving the purpose of unlocking.

[0030] Meanwhile, the design of the sector groove 18 also plays a certain limiting role. When the connecting rod 19 moves to the end of the sector groove 18, it will be blocked by the groove wall, which limits the further rotation of the rotating part 16 and the rotating shaft 12, ensuring that there will be no excessive rotation during the unlocking operation, and protecting the structural safety and normal operation of each component.

[0031] In addition, after the unlocking operation is completed, when the rotating part 16 is released, the spring 14 will release the stored elastic potential energy, causing the rotating shaft 12 to rotate in the opposite direction. At this time, the connecting rod 19 will move in the opposite direction in the sector groove 18, so that the rotating part 16 returns to the initial position, preparing for the next installation of a new contact block 2. During this process, the shape and structure of the sector groove 18 ensure that the connecting rod 19 can accurately return to the initial position, thereby ensuring the stability and reliability of the entire linkage unlocking mechanism.

[0032] When it is necessary to replace contact block 2, manually rotate the rotating part 16. The rotating part 16 drives the rotating shaft 12 to rotate through the connecting rod 19. Since the rotating shaft 12 is fixedly connected to the star-shaped turntable 10, the star-shaped turntable 10 will rotate accordingly. During the rotation of the star-shaped turntable 10, the movable groove 11 will drive the fixed block 9 to move, thereby causing the locking rod 5 to retract into the positioning block 3 and disengage from the locking hole 6. At this time, the contact block 2 can be pulled out from the positioning block 3. After the rotating part 16 is released, the spring spring 14 will drive the rotating shaft 12 to rotate in the opposite direction, so that the entire linkage unlocking mechanism and connection mechanism are reset, preparing for the next installation of a new contact block 2.

[0033] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A replaceable mold ejector pin comprising a round rod body (1) and a contact block (2), characterized in that: The top end of the round rod body (1) is fixedly connected with a positioning block (3), the bottom outer wall of the contact block (2) is fixedly connected with a connecting part (4), the connecting part (4) is inserted into the outer wall of the positioning block (3), the inside of the positioning block (3) is a hollow structure, and a connecting mechanism for fixing the contact block (2) is arranged in the inside of the positioning block (3); The connecting mechanism comprises an installation plate (7) fixedly connected to the inner wall of the positioning block (3), a star-shaped turntable (10) is arranged above the installation plate (7), a plurality of limiting blocks (8) are welded to the top outer wall of the installation plate (7), a plurality of clamping rods (5) are slidably connected to the inner walls of the plurality of limiting blocks (8), one ends of the plurality of clamping rods (5) are inserted into and extend out of the outer wall of the positioning block (3), a fixing block (9) is fixedly connected to the outer wall of one end of the plurality of clamping rods (5) located in the inside of the positioning block (3), and the star-shaped turntable (10) is provided with a movable groove (11) on the top outer wall of the plurality of ends.

2. The replaceable mold ejector pin of claim 1, wherein: A plurality of clamping holes (6) are formed in the outer wall of the connecting part (4), the plurality of clamping holes (6) correspond to and are adapted to be inserted into one ends of the plurality of clamping rods (5) located outside the positioning block (3).

3. The replaceable mold ejector pin of claim 1, wherein: The inside of the round rod body (1) is provided with a linkage unlocking mechanism for driving the plurality of clamping rods (5) to quickly retract into the inside of the positioning block (3), which comprises a rotating shaft (12) rotatably connected to the inside of the round rod body (1), the rotating shaft (12) extends into the inside of the positioning block (3) and is fixedly connected to the middle outer wall of the star-shaped turntable (10) and the installation plate (7), a circular ring (13) is fixedly connected to the top outer wall of the installation plate (7), the rotating shaft (12) is located in the inside of the circular ring (13), and a clockwork spring (14) is fixedly connected between the circular ring (13) and the rotating shaft (12).

4. The replaceable mold ejector pin of claim 3, wherein: The linkage unlocking mechanism further comprises a rotating part (16), the rotating part (16) is fixedly connected to the rotating shaft (12) through two connecting rods (19), an annular mounting groove (15) is formed in the outer wall of the round rod body (1), the rotating part (16) is rotatably connected to the inner wall of the annular mounting groove (15), two fan-shaped grooves (18) are formed in the inside of the round rod body (1), the two fan-shaped grooves (18) are in communication with the annular mounting groove (15), and the two connecting rods (19) are movably connected to the inner walls of the two fan-shaped grooves (18).

5. A replaceable mold ejector pin according to claim 4, wherein: A plurality of rolling balls (17) are rollingly connected to the upper and lower outer walls of the annular mounting groove (15) and the rotating part (16), and the plurality of rolling balls (17) are evenly distributed in a circumferential array at equal intervals.

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