A die-casting mold closing auxiliary structure

Abstract

This utility model discloses an auxiliary structure for die-casting mold closing, comprising a mounting plate and an elastic element disposed on the mounting plate. The mounting plate is used to mount a return pin and a slanted ejector pin. One end of the return pin is connected to the mounting plate, and the other end of the return pin abuts against the elastic element. The deformation direction of the elastic element is consistent with the length direction of the return pin, and the elastic element is always in a compressed state. Before mold closing, the distance from the end of the return pin away from the mounting plate to the mounting plate is greater than the distance from the top of the slanted ejector pin to the end of the mounting plate. This utility model effectively reduces friction when the front mold and the top surface of the slanted ejector pin are in contact, making the slanted ejector pin less prone to damage and thus protecting it.

Description

Technical Field

[0001] This utility model relates to the field of die casting molds, and in particular to an auxiliary structure for die casting mold closing. Background Technology

[0002] In existing mold structures, the ejector pins and the angled ejector are synchronized in their ejection and closing. During mold opening, the ejector plate drives the ejector pins and the angled ejector to move upwards synchronously. The angled ejector then pushes the product out of the mold along a specific angled trajectory, allowing the product to smoothly disengage from the undercut structure. During mold closing, both move downwards synchronously to reset. This design is intended to ensure the coordination and accuracy of the movements, thereby improving production efficiency and product quality.

[0003] However, this synchronization method has certain drawbacks. During mold closing, due to manufacturing precision errors, assembly deviations, or wear after long-term use, the top surface of the ejector pin can easily come into contact with the front mold surface. Once in contact, under the enormous pressure of mold closing, strong friction will occur between the ejector pin and the front mold surface. This friction will not only cause wear and scratches on the ejector pin surface, leading to a decrease in the ejector pin's precision and shortening its service life, but in severe cases, it may also cause deformation or breakage of the ejector pin. Moreover, excessive friction may also damage other parts of the mold, or even crush the mold, affecting normal production and increasing maintenance costs and downtime. Utility Model Content

[0004] In order to reduce the damage caused by friction between the inclined ejector and the front mold during the mold closing process, this utility model provides an auxiliary structure for mold closing of die casting molds.

[0005] This utility model provides a technical solution that adopts the following approach:

[0006] A die-casting mold closing auxiliary structure includes a mounting plate and an elastic element disposed on the mounting plate. The mounting plate is used to install a return pin and a slanted ejector pin. One end of the return pin is connected to the mounting plate, and the other end of the return pin abuts against the elastic element. The deformation direction of the elastic element is consistent with the length direction of the return pin, and the elastic element is always in a compressed state. Before mold closing, the distance from the end of the return pin away from the mounting plate to the mounting plate is greater than the distance from the slanted ejector pin tip to the end of the mounting plate.

[0007] When the mold is closed, the front mold surface first abuts against the end of the return pin and pushes the return pin. The end of the return pin is pushed by the elastic element, thereby offsetting part of the push force of the front mold. This helps to reduce the friction when the front mold and the top surface of the ejector are in contact, making the ejector less prone to damage and protecting the ejector.

[0008] Preferably, the end of the return needle is provided with a limiting block, the cross-sectional area of ​​the limiting block is larger than the cross-sectional area of ​​the return needle, the mounting plate is provided with a limiting hole for limiting the separation of the limiting block from the mounting plate, the limiting block is disposed in the limiting hole, and the return needle extends from the limiting hole and penetrates one side of the mounting plate.

[0009] The limiting block and the limiting hole cooperate to restrict the return needle from separating from the mounting plate. At the same time, the limiting hole can serve as a guide hole for the return needle to move in its length direction, so that the return needle can slide stably after being pushed by the front mold.

[0010] Preferably, the elastic element is a spring.

[0011] Springs can withstand a large number of repeated stretching, compression or torsion loads without easily fatigue failure.

[0012] Preferably, the mounting plate has a mounting hole with a diameter that is the same as the outer diameter of the spring. The spring is disposed in the mounting hole, and the length direction of the spring is the same as the length direction of the mounting hole. The diameter of the mounting hole is smaller than the diameter of the limiting hole, and the mounting hole is connected to the limiting hole.

[0013] The spring is set in the mounting hole, which guides the movement of the spring, so that the spring can be stably extended and retracted when pushed by the return needle, while the return needle is subjected to a stable reverse force. The spring force is concentrated and precise, which is conducive to stably pushing the return needle and restoring its deformation.

[0014] The diameter of the mounting hole is set so that a structure is formed between the mounting hole and the limiting hole to restrict the sliding block into the mounting hole, so that the limiting block can move stably within the limiting hole.

[0015] Preferably, the sliding distance of the limiting block within the limiting hole is 9mm-13mm.

[0016] Limiting the movable distance of the return needle ensures that the spring is always in a compressed state, while also ensuring that the pressure on the spring does not exceed the spring's elastic limit when the return needle moves to abut against the top of the mounting hole.

[0017] In this embodiment, the sliding distance of the limiting block within the limiting hole is 10mm. In other embodiments, it can also be 9mm, 11mm, 12mm, or 13mm.

[0018] Preferably, the return needles are provided in multiple locations, and the multiple return needles are respectively located at the four top corners of the mounting plate.

[0019] The multiple return needles can disperse the thrust from the front mold, which helps protect the return needle structure and extends the overall lifespan of the device.

[0020] In summary, this utility model has the following beneficial technical effects:

[0021] When the mold is closed, the front mold surface first abuts against the end of the return pin and pushes the return pin. The end of the return pin is pushed by the elastic element, thereby offsetting part of the push force of the front mold. This helps to reduce the friction when the front mold and the top surface of the ejector are in contact, making the ejector less prone to damage and protecting the ejector. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of an auxiliary structure for closing a die-casting mold according to this utility model.

[0023] Figure 2 This is a side view of an auxiliary structure for closing a die-casting mold according to the present invention.

[0024] Explanation of reference numerals in the attached diagram: 1. Mounting plate; 2. Return pin; 3. Angled pin; 4. Limiting block; 5. Limiting hole; 6. Mounting hole; 7. Spring. Detailed Implementation

[0025] The following is in conjunction with the appendix Figure 1-2 The present invention will be described in further detail below.

[0026] This utility model discloses an auxiliary structure for die casting mold closing.

[0027] Reference Figure 1 as well as Figure 2 A die-casting mold closing auxiliary structure includes a mounting plate 1 and an elastic element disposed on the mounting plate 1. The mounting plate 1 is used to install a return pin 2 and an inclined ejector 3. One end of the return pin 2 is connected to the mounting plate 1, and the other end of the return pin 2 abuts against the elastic element. The deformation direction of the elastic element is consistent with the length direction of the return pin 2, and the elastic element is always in a compressed state. Before mold closing, the distance from the end of the return pin 2 away from the mounting plate 1 to the mounting plate 1 is greater than the distance from the end of the inclined ejector 3 to the end of the mounting plate 1.

[0028] When the mold is closed, the front mold surface first abuts against the end of the return pin 2 and pushes the return pin 2. The end of the return pin 2 is pushed by the elastic element, thereby offsetting part of the front mold's push force. This helps to reduce the friction when the front mold and the top surface of the inclined ejector 3 are in contact, making the inclined ejector 3 less prone to damage and helping to protect the inclined ejector 3.

[0029] Reference Figure 1 as well as Figure 2 In this embodiment, the end of the return needle 2 is provided with a limiting block 4. The cross-sectional area of ​​the limiting block 4 is larger than the cross-sectional area of ​​the return needle 2. The mounting plate 1 is provided with a limiting hole 5 for limiting the separation of the limiting block 4 from the mounting plate 1. The limiting block 4 is located in the limiting hole 5. The return needle 2 extends from the limiting hole 5 and passes through one side of the mounting plate 1.

[0030] The limiting block 4 cooperates with the limiting hole 5 to restrict the return needle 2 from separating from the mounting plate 1. At the same time, the limiting hole 5 can serve as a guide hole for the return needle 2 to move in its length direction, so that the return needle 2 can slide stably after being pushed by the front mold.

[0031] Reference Figure 1 as well as Figure 2 In this embodiment, the elastic element is spring 7.

[0032] Spring 7 can withstand a large number of repeated tensile, compressive or torsional cyclic loads without easily experiencing fatigue failure.

[0033] Reference Figure 1 as well as Figure 2 In this embodiment, the mounting plate 1 has a mounting hole 6. The diameter of the mounting hole 6 is the same as the outer diameter of the spring 7. The spring 7 is located in the mounting hole 6. The length direction of the spring 7 is the same as the length direction of the mounting hole 6. The diameter of the mounting hole 6 is smaller than the diameter of the limiting hole 5. The mounting hole 6 is connected to the limiting hole 5.

[0034] Spring 7 is set in mounting hole 6. Mounting hole 6 can guide the movement of spring 7, so that spring 7 can stably extend and retract when pushed by needle 2. At the same time, needle 2 is subjected to a stable reverse force. Moreover, the elastic force of spring 7 is concentrated and precise, which is conducive to stably pushing needle 2 and restoring deformation.

[0035] The diameter of the mounting hole 6 is set such that a structure is formed between the mounting hole 6 and the limiting hole 5 to restrict the limiting block 4 from sliding into the mounting hole 6, so that the limiting block 4 can move stably within the limiting hole 5.

[0036] Reference Figure 1 as well as Figure 2 In this embodiment, the sliding distance of the limiting block 4 within the limiting hole 5 is 9mm-13mm.

[0037] Limiting the movable distance of the return needle 2 ensures that the spring 7 is always in a compressed state, while also ensuring that the pressure on the spring 7 does not exceed the elastic limit of the spring 7 when the return needle 2 moves to abut against the top of the mounting hole 6.

[0038] In this embodiment, the sliding distance of the limiting block 4 within the limiting hole 5 is 10mm. In other embodiments, it can also be 9mm, 11mm, 12mm, or 13mm.

[0039] Reference Figure 1 as well as Figure 2 In this embodiment, multiple return needles 2 are provided, and the multiple return needles 2 are respectively located at the four top corners of the mounting plate 1.

[0040] The arrangement of multiple return needles 2 can disperse the thrust from the front mold, which helps protect the return needle 2 structure and makes the overall device last longer.

[0041] The above are all preferred embodiments of this utility model, and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape and principle of this utility model should be covered within the scope of protection of this utility model.

Claims

1. A die-casting mold closing auxiliary structure, characterized in that: The device includes a mounting plate and an elastic element mounted on the mounting plate. The mounting plate is used to mount a return pin and a slanted ejector pin. One end of the return pin is connected to the mounting plate, and the other end of the return pin abuts against the elastic element. The deformation direction of the elastic element is consistent with the length direction of the return pin, and the elastic element is always in a compressed state. Before mold closing, the distance from the end of the return pin away from the mounting plate to the mounting plate is greater than the distance from the slanted ejector pin to the end of the mounting plate.

2. The die-casting mold closing auxiliary structure according to claim 1, characterized in that: The end of the return needle is provided with a limiting block, the cross-sectional area of ​​the limiting block is larger than the cross-sectional area of ​​the return needle, the mounting plate is provided with a limiting hole for limiting the separation of the limiting block from the mounting plate, the limiting block is located in the limiting hole, and the return needle extends from the limiting hole and penetrates one side of the mounting plate.

3. The die-casting mold closing auxiliary structure according to claim 2, characterized in that: The elastic element is a spring.

4. The die-casting mold closing auxiliary structure according to claim 3, characterized in that: The mounting plate has a mounting hole with a diameter that is the same as the outer diameter of the spring. The spring is located inside the mounting hole, and the length direction of the spring is the same as the length direction of the mounting hole. The diameter of the mounting hole is smaller than the diameter of the limiting hole, and the mounting hole is connected to the limiting hole.

5. The die-casting mold closing auxiliary structure according to claim 4, characterized in that: The sliding distance of the limiting block within the limiting hole is 9mm-13mm.

6. The die-casting mold closing auxiliary structure according to claim 5, characterized in that: The mounting plate has multiple return needles, which are respectively located at the four top corners of the mounting plate.

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