A slider limiting mechanism for injection molds

Abstract

This utility model provides a slider limiting mechanism for an injection mold, comprising: a moving mold base, a fixed mold base disposed on the right side of the moving mold base, and a limiting component disposed on the side of the moving mold base opposite to the fixed mold base; the limiting component includes a slider body disposed on the inner side of the moving mold base that can slide up and down, and a pressure strip disposed on the right side of the moving mold base and on the right side of the slider body. This utility model provides a slider limiting mechanism for an injection mold, which, by providing a second spring, an ejector rod, and a contact rod, achieves a shallow to deep limiting change of the positioning pin without affecting the normal introduction of the inclined guide rod. Furthermore, the positioning pins are respectively provided with two sets on both sides to support and limit the slider body, greatly improving the limiting effect of the slider body and preventing displacement caused by the slider body's own weight.

Description

Technical Field

[0001] This utility model relates to the field of mold sliders, and in particular to a slider limiting mechanism for injection molds. Background Technology

[0002] Injection molds are tools used for mass production of plastic parts. They typically consist of two parts: a moving mold and a fixed mold. Molten plastic is injected into the mold cavity by an injection molding machine, and after cooling and solidification, it forms plastic parts with specific shapes and sizes.

[0003] When producing products, injection molds typically require a core-pulling structure with inclined guide rods and inclined guide holes to extract the product's hook holes. This is achieved by fixing inclined guide rods on a fixed mold plate and sliding core-pulling sliders on a moving mold plate. The core-pulling sliders have inclined guide holes. When the mold opens, the inclined guide rods and inclined guide holes work together to drive the core-pulling sliders to pull the core.

[0004] In injection molds, sliders are used to achieve lateral core pulling or demolding, solving the molding problems of complex structures such as side holes, side recesses, and bosses on plastic parts. During mold opening, the slider moves along the guide mechanism, disengaging from the lateral structure of the plastic part, allowing for smooth demolding. In related technologies, sliders with limiting structures exist; however, when using such devices, because the inclined guide rod of the moving mold needs to drive the slider to move closer to the mold cavity when pressed down, the limiting structure cannot provide strong fixation of the slider's position (usually a downward-pressing ball bearing positioning). This results in an insignificant positioning effect for the slider. When the inclined guide rod moves upward and disengages from the slider, the slider may still displace under its own weight, overcoming the slight positioning limiting mechanism, thus affecting the accurate subsequent insertion of the inclined guide rod.

[0005] Therefore, it is necessary to provide a slider limiting mechanism for injection molds to solve the above-mentioned technical problems. Utility Model Content

[0006] This utility model provides a slider limiting mechanism for injection molds, which solves the problem that in some existing injection mold slider limiting mechanisms, it is not convenient to provide a stable limiting effect on the slider during use, resulting in the slider still having the possibility of displacement.

[0007] To solve the above-mentioned technical problems, this utility model provides a slider limiting mechanism for an injection mold, comprising: a moving mold base, a fixed mold base disposed on the right side of the moving mold base, and a limiting component disposed on the side of the moving mold base opposite to the fixed mold base; The limiting component includes a slider body that can slide up and down inside the moving mold base. A pressure strip is provided on the right side of the moving mold base and on the right side of the slider body. A first slot is provided on the inner side of the pressure strip. A positioning post is provided on the inner side of the first slot that can slide left and right. A positioning groove is provided on the right side of the slider body for cooperating with the positioning post. The left end of the positioning post passes through the inner side of the first slot and extends to the inner side of the positioning groove.

[0008] Preferably, a second slot is provided on the inner side of the pressure strip and below the first slot, a first spring is provided on the inner side of the first slot and to the right of the positioning post, and a wear-resistant rope is provided at the right end of the positioning post, with the end of the wear-resistant rope away from the positioning post fixed to the inner side of the second slot.

[0009] Preferably, a slanted guide rod block is provided on the left side of the fixed mold base, a push rod is provided on the front of the slanted guide rod block, a contact rod is provided on the left end of the push rod that can slide left and right, the left end of the contact rod is located inside the second slot, and a rope pressing groove is provided on the left end of the contact rod located inside the second slot.

[0010] Preferably, a second spring is provided on the inner side of the top rod and at the right end of the contact rod.

[0011] Preferably, the inclined guide rod block has an inclined guide rod body on its inner side, and the slider body has an inclined guide rod groove on its right side.

[0012] Preferably, a limiting piece is provided on the right side of the moving mold base and above the slider body.

[0013] Compared with related technologies, the slider limiting mechanism for injection molds provided by this utility model has the following beneficial effects: This utility model provides a slider limiting mechanism for injection molds. By setting a second spring, a push rod, and a contact rod, it can achieve the limiting change of the positioning post from shallow to deep without affecting the normal introduction of the inclined guide rod. Moreover, the positioning post is provided with two sets on both sides to support and limit the slider body, which greatly improves the limiting effect of the slider body and avoids displacement caused by the large weight of the slider body. Attached Figure Description

[0014] Figure 1 A schematic diagram of a preferred embodiment of a slider limiting mechanism for an injection mold provided by this utility model; Figure 2 This is a top view of the moving mold base, which is a structural schematic diagram. Figure 3 This is a structural schematic diagram of a cross-sectional view of the slider body; Figure 4A structural schematic diagram showing the cross-sectional view of the inclined guide rod of the moving mold base in the disengaged state; Figure 5 A structural schematic diagram showing the cross-sectional view of the inclined guide rod in the pressure strip section; Figure 6 This is a structural schematic diagram showing the state profile of the inclined guide rod in the top rod section.

[0015] The following are the labeling elements in the diagram: 10. Moving mold base; 20. Fixed mold base; 2. Limiting component; 21. Slider body; 22. Pressure bar; 23. First slot; 24. Positioning pin; 25. Positioning groove; 26. Second slot; 27. First spring; 28. Wear-resistant rope; 29. ​​Inclined guide rod block; 3. Ejector rod; 4. Contact rod; 5. Second spring; 6. Inclined guide rod body; 7. Limiting piece. Detailed Implementation

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] Please refer to the following: Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 A slider limiting mechanism for an injection mold includes: a moving mold base 10, a fixed mold base 20 disposed on the right side of the moving mold base 10, and a limiting component 2 disposed on the side of the moving mold base 10 opposite to the fixed mold base 20. The limiting component 2 includes a slider body 21 that can slide up and down and is disposed inside the moving mold base 10. A pressure strip 22 is disposed on the right side of the moving mold base 10 and on the right side of the slider body 21. A first slot 23 is provided on the inner side of the pressure strip 22. A positioning post 24 is disposed on the inner side of the first slot 23 that can slide left and right. A positioning groove 25 for cooperating with the positioning post 24 is provided on the right side of the slider body 21. The left end of the positioning post 24 passes through the inner side of the first slot 23 and extends to the inner side of the positioning groove 25.

[0018] With the positioning groove 25, positioning post 24 and first spring 27 provided, after the normal inclined guide rod is disengaged from the slider, the first spring 27 pops out and causes the positioning post 24 to penetrate into the inner side of the positioning groove 25. Since the positioning post 24 penetrates deeper into the inner side of the positioning groove 25 than the ordinary semi-circular limit, it can limit the slider body 21 and prevent the slider body 21 from moving under its own weight.

[0019] A second slot 26 is provided on the inner side of the pressure strip 22 and below the first slot 23. A first spring 27 is provided on the inner side of the first slot 23 and to the right of the positioning post 24. A wear-resistant rope 28 is provided at the right end of the positioning post 24. The end of the wear-resistant rope 28 away from the positioning post 24 is fixed to the inner side of the second slot 26.

[0020] An inclined guide rod block 29 is provided on the left side of the fixed mold base 20. An ejector rod 3 is provided on the front of the inclined guide rod block 29. A contact rod 4 is provided on the left end of the ejector rod 3, which can slide left and right. The left end of the contact rod 4 is located inside the second slot 26. A rope pressing groove is provided on the left end of the contact rod 4, which is located inside the second slot 26.

[0021] As the inclined guide rod block 29 gradually approaches the slider body 21, the contact rod 4 will abut against the circumferential side of the wear-resistant rope 28 when the inclined guide rod is inserted into the inner side of the inclined guide rod groove. As the inclined guide rod block 29 approaches, the contact rod 4 will gradually press the circumferential side of the wear-resistant rope 28 towards the inner side of the second slot 26, thereby shortening the end of the wear-resistant rope 28 near the positioning post 24, thereby pulling the positioning post 24 out of engagement with the positioning groove 25, and then the slider body 21 can be guided to move by the inclined guide rod.

[0022] A second spring 5 is provided on the inner side of the push rod 3 and at the right end of the contact rod 4.

[0023] Since the inclined guide rod will still move towards one side of the slider body 21 after the contact rod 4 has disengaged from the positioning post 24 and the positioning groove 25, the second spring 5 will be gradually compressed to... Figure 6 As shown, the second spring 5 has a higher stiffness than the first spring 27. Therefore, during the process of the contact rod 4 moving to the left, the first spring 27 will be compressed first and the second spring 5 will be compressed intermittently. This can satisfy the requirement of retracting the positioning post 24 without affecting the normal guidance of the inclined guide rod.

[0024] An inclined guide rod body 6 is provided on the inner side of the inclined guide rod block 29, and an inclined guide rod groove is provided on the right side of the slider body 21.

[0025] A limiting piece 7 is provided on the right side of the moving mold base 10 and above the slider body 21.

[0026] The bottom of the limiting piece 7 will contact the top of the slider body 21 when it is at its highest position, thus limiting the top of the slider body 21.

[0027] The working principle of the slider limiting mechanism for injection mold provided by this utility model is as follows: Step 1: During use, when the inclined guide rod is inserted into the inclined guide rod groove, the contact rod 4 will abut against the peripheral side of the wear-resistant rope 28 when the inclined guide rod is inserted into the inner side of the inclined guide rod groove. As the inclined guide rod block 29 approaches, the contact rod 4 will gradually press the peripheral side of the wear-resistant rope 28 towards the inner side of the second slot 26, thereby shortening the end of the wear-resistant rope 28 near the positioning post 24, thereby pulling the positioning post 24 out of engagement with the positioning groove 25, and then the slider body 21 can be guided to move by the inclined guide rod. Step 2: When the inclined guide rod disengages from the slider body 21, the contact rod 4 disengages from the wear-resistant rope 28. Then, under the action of the first spring 27, the positioning post 24 is ejected and abuts against the inner side of the positioning groove 25. Since the positioning post 24 displaces relatively far to the positioning groove 25, the semi-circular support is replaced by a cylindrical support, so that the weight of the slider body 21 is transferred to the pressure strip 22 for support. This avoids the possibility that the force direction may change due to the semi-circular support, which could compress the first spring 27 and cause the slider body 21 to move on its own.

[0028] Compared with related technologies, the slider limiting mechanism for injection molds provided by this utility model has the following beneficial effects: By incorporating a second spring 5, a push rod 3, and a contact rod 4, the positioning post 24 can be adjusted from shallow to deep without affecting the normal insertion of the inclined guide rod. Furthermore, the positioning post 24 is equipped with two sets of supports on both sides to limit the slider body 21, which greatly improves the limiting effect of the slider body 21 and prevents displacement of the slider body 21 due to its large weight.

[0029] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A slider limiting mechanism for an injection mold, characterized in that, include: A moving mold base (10) is provided with a fixed mold base (20) on the right side of the moving mold base (10), and a limit component (2) is provided on the side of the moving mold base (10) opposite to the fixed mold base (20). The limiting component (2) includes a slider body (21) that can slide up and down and is disposed inside the moving mold base (10). A pressure strip (22) is disposed on the right side of the moving mold base (10) and on the right side of the slider body (21). A first slot (23) is provided on the inner side of the pressure strip (22). A positioning post (24) is provided on the inner side of the first slot (23) that can slide left and right. A positioning groove (25) for cooperating with the positioning post (24) is provided on the right side of the slider body (21). The left end of the positioning post (24) passes through the inner side of the first slot (23) and extends to the inner side of the positioning groove (25).

2. The slider limiting mechanism for an injection mold according to claim 1, characterized in that, A second slot (26) is provided on the inner side of the pressure strip (22) and below the first slot (23). A first spring (27) is provided on the inner side of the first slot (23) and to the right of the positioning post (24). A wear-resistant rope (28) is provided at the right end of the positioning post (24). One end of the wear-resistant rope (28) away from the positioning post (24) is fixed to the inner side of the second slot (26).

3. The slider limiting mechanism for an injection mold according to claim 2, characterized in that, An inclined guide block (29) is provided on the left side of the fixed mold base (20). A top rod (3) is provided on the front of the inclined guide block (29). A contact rod (4) is provided on the left end of the top rod (3) and can slide left and right. The left end of the contact rod (4) is located inside the second slot (26). A rope pressing groove is provided on the left end of the contact rod (4) and inside the second slot (26).

4. The slider limiting mechanism for an injection mold according to claim 3, characterized in that, A second spring (5) is provided on the inner side of the top rod (3) and at the right end of the contact rod (4).

5. The slider limiting mechanism for an injection mold according to claim 3, characterized in that, The inclined guide rod block (29) has an inclined guide rod body (6) on its inner side, and the slider body (21) has an inclined guide rod groove on its right side.

6. The slider limiting mechanism for an injection mold according to claim 1, characterized in that, A limiting piece (7) is provided on the right side of the moving mold base (10) and above the slider body (21).

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