A quick-change ejector pin for injection molds

Abstract

This utility model relates to the technical field of injection molding machine mold changing equipment, and provides a quick-change ejector pin for injection molds, including a main ejector pin, a positioning pin, and a secondary ejector pin. One end of the main ejector pin is connected to the mold, the other end of the main ejector pin is connected to one end of the positioning pin, and the other end of the positioning pin is detachably connected to the secondary ejector pin. This quick-change ejector pin is a detachable ejector pin structure, which eliminates the need to remove the main ejector pin when changing ejector pins; only the secondary ejector pin needs to be replaced, thus improving ejector pin replacement efficiency and consequently increasing mold changing efficiency.

Description

Technical Field

[0001] This utility model relates to the technical field of injection molding machine mold changing equipment, specifically a quick-change ejector pin for injection molds. Background Technology

[0002] In injection molding, rapid mold change is a key technology for improving production efficiency and reducing downtime in manufacturing, especially in fields where frequent mold changes are required. Ejector pins (also known as ejector pins or ejector teeth) are core components of the mold release system. Traditional ejector pin replacement processes suffer from labor inefficiency. Replacing the ejector pin requires removing the fixing screws at its rear end and then pushing it out. However, the ejector pins are heavy, often requiring two people to replace them, resulting in wasted manpower and time.

[0003] Therefore, the problem to be solved by this utility model is: how to solve the problem of difficulty in replacing ejector pins in injection molds. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a quick-change ejector pin for injection molds. This quick-change ejector pin is a detachable ejector pin structure. When replacing the ejector pin, it is not necessary to remove the main ejector pin. Only the secondary ejector pin part needs to be replaced, which improves the ejector pin replacement efficiency and thus improves the mold change efficiency.

[0005] The technical solution of this utility model is:

[0006] A quick-change ejector pin for an injection mold includes a main ejector pin, a positioning pin, and a secondary ejector pin; one end of the main ejector pin is connected to the mold, the other end of the main ejector pin is connected to one end of the positioning pin, and the other end of the positioning pin is detachably connected to the secondary ejector pin.

[0007] In the aforementioned quick-change ejector pin for injection molds, one end of the secondary ejector pin is provided with a hole; the hole extends along the central axis of the secondary ejector pin; a locking groove is provided on one side of the hole; the locking groove extends from the hole toward the outer wall of the secondary ejector pin; the locking groove has an L-shaped structure, including a first groove and a second groove; the first groove extends from one end of the hole along the length direction of the secondary ejector pin; the second groove extends along the circumference of the secondary ejector pin.

[0008] In the above-mentioned quick-change ejector pin for injection mold, one end of the positioning pin is provided with a pin hole, and the auxiliary ejector pin is detachably mounted on the positioning pin by passing a pin through the pin hole; one end of the pin extends outward and can move along the locking groove;

[0009] One end of the positioning post, which has the pin hole, passes through the hole and connects to the auxiliary top rod.

[0010] In the above-mentioned quick-change ejector pin for injection molds, the main ejector pin is detachably connected to the positioning pin.

[0011] In the above-mentioned quick-change ejector pin for injection mold, one end of the main ejector pin is connected to the mold, and the other end of the main ejector pin is provided with a threaded hole; the threaded hole extends along the central axis of the main ejector pin.

[0012] In the aforementioned quick-change ejector pin for injection molds, one end of the positioning pin is threaded; the positioning pin is threadedly connected to the main ejector pin.

[0013] In the above-mentioned quick-change ejector pin for injection mold, there are two locking grooves, which are arranged opposite to each other on both sides of the hole; the second grooves of the two locking grooves extend in opposite directions along the circumferential direction.

[0014] In the aforementioned quick-change ejector pin for injection molds, both ends of the pin extend outwards and are respectively able to move along the two locking grooves.

[0015] This utility model has at least one of the following advantages or beneficial effects:

[0016] This invention distinguishes between a main ejector pin and a secondary ejector pin, and connects the two detachably with a positioning pin to form a detachable ejector pin structure. When replacing the ejector pin, it is not necessary to remove the main ejector pin; only the secondary ejector pin needs to be replaced, which improves the ejector pin replacement efficiency and thus enhances the mold change efficiency. Attached Figure Description

[0017] Figure 1 This is an overall schematic diagram of the quick-change ejector pin of the injection mold according to Embodiment 1 of this utility model;

[0018] Figure 2 This is a cross-sectional schematic diagram of the main ejector pin of the quick-change ejector pin of the injection mold according to Embodiment 1 of this utility model;

[0019] Figure 3 This is a front view of the main ejector pin of the quick-change ejector pin of the injection mold according to Embodiment 1 of this utility model;

[0020] Figure 4 This is a cross-sectional schematic diagram of the secondary ejector rod of the quick-change ejector rod of the injection mold according to Embodiment 1 of this utility model;

[0021] Figure 5 This is a front view of the secondary ejector pin of the quick-change ejector pin of the injection mold according to Embodiment 1 of this utility model;

[0022] Figure 6 This is a front view of the positioning post of the quick-change ejector pin of the injection mold in Embodiment 1 of this utility model.

[0023] Explanation of reference numerals in the attached figures:

[0024] Main push rod 1; threaded hole 11; auxiliary push rod 2; hole 21; clamping groove 22; first groove 221; second groove 222; positioning pin 3; pin hole 31; thread 32. Detailed Implementation

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

[0026] Example 1

[0027] like Figures 1-6 As shown, an embodiment of this utility model provides a quick-change ejector pin for an injection mold, including a main ejector pin 1, a positioning pin 3, and a secondary ejector pin 2; one end of the main ejector pin 1 is connected to the mold, the other end of the main ejector pin 1 is connected to one end of the positioning pin 3, and the other end of the positioning pin 3 is detachably connected to the secondary ejector pin 2.

[0028] In practical applications, ejector pins are usually only damaged due to frequent stress, friction, or high temperature. There is no need to replace the undamaged parts. Therefore, in this embodiment, the ejector pin is divided into a main ejector pin 1 and a secondary ejector pin 2, and the two are detachably connected by a positioning pin 3 to form a detachable ejector pin structure. When replacing the ejector pin, it is not necessary to remove the main ejector pin 1. Only the secondary ejector pin 2 needs to be replaced, which improves the ejector pin replacement efficiency and thus improves the mold change efficiency.

[0029] In this embodiment, specifically, one end of the auxiliary push rod 2 is provided with a hole 21; the hole 21 extends along the central axis of the auxiliary push rod 2; a locking groove 22 is provided on one side of the hole 21; the locking groove 22 extends from the hole 21 toward the outer wall of the auxiliary push rod 2; the locking groove 22 has an L-shaped structure, including a first groove 221 and a second groove 222; the first groove 221 extends from one end of the hole 21 along the length direction of the auxiliary push rod 2; the second groove 222 extends along the circumference of the auxiliary push rod 2.

[0030] More specifically, one end of the positioning post 3 is provided with a pin hole 31, and the auxiliary push rod 2 is detachably mounted on the positioning post 3 by passing through the pin hole 31 via a pin 22; one end of the pin 22 extends outward and can move along the locking groove 22;

[0031] The positioning post 3 has one end with the pin hole 31 passing through the hole 21 and connected to the auxiliary top rod 2.

[0032] Under the above design:

[0033] When it is necessary to connect the main push rod 1 and the auxiliary push rod 2, the operator only needs to align the hole 21 of the auxiliary push rod 2 with the positioning pin 3, and then push the auxiliary push rod 2 into the positioning pin 3. At this time, the pin 22 should be located on the first groove 221 of the locking groove 22. As the push goes deeper, the pin 22 is located at the end of the first groove 221. Then the operator rotates the auxiliary push rod 2 to make the pin 22 enter the second groove 222, thus completing the axial locking without affecting the normal use of the push rod.

[0034] When it is necessary to disassemble and replace the secondary ejector rod 2, the operator only needs to pull out the secondary ejector rod 2, remove it from the mold, and then rotate the secondary ejector rod 2 to make the pin 22 exit from the second groove 222 and enter the first groove 221, thereby releasing the axial clamping. Then the secondary ejector rod 2 can be pulled out along the first groove 221.

[0035] In this embodiment, preferably, the main push rod 1 is detachably connected to the positioning post 3.

[0036] In the preferred embodiment described above, one end of the main ejector rod 1 is connected to the mold, and the other end of the main ejector rod 1 is provided with a threaded hole 11; the threaded hole 11 extends along the central axis of the main ejector rod 1.

[0037] More specifically, one end of the positioning pin 3 is provided with a thread 32; the positioning pin 3 is threadedly connected to the main push rod 1.

[0038] With the above design, the main push rod 1 can also be replaced as needed, improving the practicality of the push rod in this embodiment.

[0039] In this embodiment, more preferably, there are two locking grooves 22, which are disposed opposite to each other on both sides of the hole 21; the second grooves 222 of the two locking grooves 22 extend in opposite directions along the circumferential direction.

[0040] More specifically, both ends of the pin 22 extend outward and are respectively movable along the two locking grooves 22.

[0041] With the above design, the two ends of the pin 22 move along the locking grooves 22 on both sides, thereby achieving axial locking in two positions, which can enhance the stability of locking.

[0042] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A quick-change ejector pin for injection molds, characterized in that, It includes a main ejector rod, a positioning post, and a secondary ejector rod; one end of the main ejector rod is connected to the mold, the other end of the main ejector rod is connected to one end of the positioning post, and the other end of the positioning post is detachably connected to the secondary ejector rod.

2. The quick-change ejector pin for injection molds according to claim 1, characterized in that, One end of the auxiliary push rod is provided with a hole; the hole extends along the central axis of the auxiliary push rod; a locking groove is provided on one side of the hole; the locking groove extends from the hole toward the outer wall of the auxiliary push rod; the locking groove has an L-shaped structure and includes a first groove and a second groove; the first groove extends from one end of the hole along the length direction of the auxiliary push rod; the second groove extends along the circumference of the auxiliary push rod.

3. The quick-change ejector pin for injection molds according to claim 2, characterized in that, One end of the positioning post is provided with a pin hole, and the auxiliary push rod is detachably mounted on the positioning post by passing a pin through the pin hole; one end of the pin extends outward and can move along the locking groove; One end of the positioning post, which has the pin hole, passes through the hole and connects to the auxiliary top rod.

4. The quick-change ejector pin for injection molds according to claim 1, characterized in that, The main push rod is detachably connected to the positioning post.

5. The quick-change ejector pin for injection molds according to claim 4, characterized in that, One end of the main ejector rod is connected to the mold, and the other end of the main ejector rod is provided with a threaded hole; the threaded hole extends along the central axis of the main ejector rod.

6. The quick-change ejector pin for injection molds according to claim 5, characterized in that, One end of the positioning post is threaded; the positioning post is threadedly connected to the main push rod.

7. The quick-change ejector pin for injection molds according to claim 3, characterized in that, There are two locking grooves, which are arranged opposite to each other on both sides of the hole; the second grooves of the two locking grooves extend in opposite directions along the circumferential direction.

8. The quick-change ejector pin for injection molds according to claim 7, characterized in that, Both ends of the pin extend outward and are respectively movable along the two locking grooves.

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