Mold capable of automatically ejecting injection molding product

Abstract

The utility model discloses a mold capable of automatically ejecting injection molding products, which relates to the technical field of injection molding equipment and comprises a first mold, a second mold, a first linear driving mechanism, a second linear driving mechanism, a first ejector rod and a second ejector rod. The first mold and the second mold are both designed to be movable molds, so that the first mold and the second mold can be subjected to movement adjustment during mold closing and mold detaching, a first ejector rod and a first through hole generate relative displacement during movement adjustment of the first mold, and a second ejector rod and a second through hole generate relative displacement during movement adjustment of the second mold; during mold removal, the first ejector rod and the second ejector rod are fixed, so that the first ejector rod penetrates through the first through hole and enters the first injection molding cavity to eject an injection molding product, the second ejector rod penetrates through the second through hole and enters the second injection molding cavity to eject the injection molding product, and automatic ejection operation in the mold removal process can be achieved.

Description

Technical Field

[0001] This utility model relates to the field of injection molding equipment technology, specifically to a mold that can automatically eject injection molded products. Background Technology

[0002] Injection molding, also known as injection molding, produces products with precise dimensions and can create complex shapes. Injection molding equipment is widely used in mass production and molding processes for complex-shaped products.

[0003] Patent (CN221985740U) discloses a rapid demolding assembly for an injection molding machine, including a demolding bracket. A fixed mold is provided at the lower part of the demolding bracket, and a hydraulic cylinder is provided at the upper part of the demolding bracket. The output end of the hydraulic cylinder is fixedly connected to a moving mold. Two demolding mechanisms are installed on two opposite sides of the moving mold, and an ejector mechanism is installed at each of the four corners of the top of the moving mold. In this rapid demolding assembly for an injection molding machine, the hydraulic cylinder drives the moving mold and the ejector to close. Hot melt material is injected into the gate by the injection molding machine. After the hot melt material solidifies, the hydraulic cylinder drives the moving mold to rise, and the cylinder pushes the support plate to clamp the injection molded part until the slide rod touches the top plate. At the same time, the electric push rod pushes the support plate to fall. The demolding process can be completed under the action of thrust, pull and gravity, which improves the demolding efficiency. After demolding, the injection molded part falls onto the support plate, which can prevent the injection molded part from falling off and being damaged, thus improving the yield rate.

[0004] The rapid demolding assembly of the injection molding machine in the aforementioned patent assists in demolding the injection molded parts by setting up cylinders and clamping components. However, this demolding method requires the injection molded parts to fall down along the moving mold under their own weight first, then the injection molded parts are clamped, and finally the injection molded parts are pulled down to demold. This demolding method has a relatively complex structure, and the initial steps depend on the weight of the injection molded parts themselves and the friction between them and the moving mold, which makes the demolding operation highly uncertain and results in low accuracy. Summary of the Invention

[0005] The purpose of this invention is to provide a mold that can automatically eject injection molded products, so as to solve the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a mold for automatically ejecting injection molded products, comprising two cooperating first molds and second molds, wherein a first linear drive mechanism is provided on the outer wall of the first mold away from the second mold, and a second linear drive mechanism is provided on the outer wall of the second mold away from the first mold. A plurality of first ejector pins are provided on the outer wall of the first linear drive mechanism near the first mold, and a first through hole matching the first ejector pins is opened on the surface of the first mold. A plurality of second ejector pins are provided on the outer wall of the second linear drive mechanism near the second mold, and a second through hole matching the second ejector pins is opened on the surface of the second mold.

[0007] Furthermore, the outer wall of the first mold is provided with a first injection cavity on the side near the second mold, and the first through hole is provided inside the first injection cavity. The outer wall of the second mold is provided with a second injection cavity on the side near the first mold, and the second through hole is provided inside the second injection cavity.

[0008] Furthermore, two of each of the first and second push rods are provided, and the line connecting the two first push rods is perpendicular to the line connecting the two second push rods.

[0009] Furthermore, an injection tube is provided on the outer wall of the first mold away from the center of the second mold. The first linear drive mechanism includes a first support plate. The injection tube passes through the first support plate and extends to the outside of the first support plate. The outer wall of the injection tube is slidably connected to the first support plate. The first push rod is provided on one side of the outer wall of the first support plate. On the other side of the outer wall of the first support plate, a plurality of first cylinders are provided outside the injection tube. The output end of the first cylinder is fixedly connected to the outer wall of the first mold.

[0010] Furthermore, the second linear drive mechanism includes a second support plate, a second push rod is disposed on one side of the outer wall of the second support plate, and a second cylinder is disposed at the center of the outer wall of the second support plate away from the second push rod, and the output end of the second cylinder is fixedly connected to the center of the outer wall of the second mold.

[0011] Furthermore, the length of the first ejector pin is greater than the thickness of the first mold, the length of the second ejector pin is greater than the thickness of the second mold, the length of the first ejector pin is less than half the distance between the first support plate and the second support plate, and the length of the second ejector pin is less than half the distance between the first support plate and the second support plate.

[0012] Compared with the prior art, the beneficial effects achieved by this utility model are:

[0013] 1. This utility model, by setting up a first mold, a second mold, a first linear drive mechanism, a second linear drive mechanism, a first ejector pin, a first through hole, a second ejector pin, and a second through hole, provides injection space for the injection molded product. The first linear drive mechanism is used to adjust the linear motion of the first mold, and the second linear drive mechanism is used to adjust the linear motion of the second mold, enabling mold closing and demolding operations of the first and second molds. Both the first and second molds are designed as moving molds, so that the first and second molds can be adjusted in motion during mold closing and demolding. When the first mold is adjusted in motion, the first ejector pin and the first through hole undergo relative displacement. When the second mold is adjusted in motion, the second ejector pin and the second through hole undergo relative displacement. When the mold is demolded, the first and second ejector pins can automatically eject the injection molded product.

[0014] 2. In this utility model, during demolding, the first mold and the second mold move away from each other. The first ejector pin remains stationary, and the first through hole of the first mold moves with the first mold, allowing the first ejector pin to pass through the first through hole and enter the first injection cavity to eject the injection molded product. This enables automatic ejection during demolding. The second ejector pin remains stationary, and the second through hole of the second mold moves with the second mold, allowing the second ejector pin to pass through the second through hole and enter the second injection cavity to eject the injection molded product. This also enables automatic ejection during demolding. Attached Figure Description

[0015] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the structure of the first mold and the first linear drive mechanism of this utility model;

[0018] Figure 3 This is a structural schematic diagram of the first mold and the first linear drive mechanism of this utility model from another angle;

[0019] Figure 4 This is a schematic diagram of the structure of the second mold and the second linear drive mechanism of this utility model;

[0020] Figure 5 This is a schematic diagram of the structure of the second linear drive mechanism of this utility model;

[0021] In the figure: 1. First mold; 101. First injection cavity; 102. Injection tube; 2. Second mold; 201. Second injection cavity; 3. First linear drive mechanism; 301. First support plate; 302. First cylinder; 4. Second linear drive mechanism; 401. Second support plate; 402. Second cylinder; 5. First ejector rod; 6. First through hole; 7. Second ejector rod; 8. Second through hole. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. 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.

[0023] Please see Figures 1-5 This utility model provides a technical solution: a mold capable of automatically ejecting injection-molded products, comprising two cooperating first molds 1 and second molds 2. A first linear drive mechanism 3 is provided on the outer wall of the first mold 1 away from the second mold 2. A second linear drive mechanism 4 is provided on the outer wall of the second mold 2 away from the first mold 1. A plurality of first ejector pins 5 are provided on the outer wall of the first linear drive mechanism 3 near the first mold 1. A first through hole 6 matching the first ejector pins 5 is opened on the surface of the first mold 1. A plurality of second ejector pins 7 are provided on the outer wall of the second linear drive mechanism 4 near the second mold 2. A second through hole 8 matching the second ejector pins 7 is opened on the surface of the second mold 2. A first injection cavity 101 is provided on the outer wall of the first mold 1 near the second mold 2, with the first through hole 6 located inside the first injection cavity 101. A second injection cavity 201 is provided on the outer wall of the second mold 2 near the first mold 1, with the second through hole 8 located inside the second injection cavity 201.

[0024] In one embodiment, two of the first ejector pins 5 and two of the second ejector pins 7 are provided, and the line connecting the two first ejector pins 5 and the line connecting the two second ejector pins 7 are perpendicular to each other. The number and position of the first ejector pins 5 and the second ejector pins 7 are limited so that only two of the first through holes 6 and the second through holes 8 are required. This can effectively reduce the risk of injection molding material entering the first through holes 6 and the second through holes 8. At the same time, the two first ejector pins 5 and the two second ejector pins 7 perform a cross-shaped ejection operation on both sides of the outer wall of the injection molded product, ensuring that the first ejector pins 5 and the second ejector pins 7 can automatically eject and demold the injection molded product from the first mold 1 and the second mold 2.

[0025] In one embodiment, an injection tube 102 is provided on the outer wall of the first mold 1 away from the center of the second mold 2. The first linear drive mechanism 3 includes a first support plate 301. The injection tube 102 passes through the first support plate 301 and extends to the outside of the first support plate 301. The outer wall of the injection tube 102 is slidably connected to the first support plate 301. The first push rod 5 is provided on one side of the outer wall of the first support plate 301. On the other side of the outer wall of the first support plate 301, a plurality of first cylinders 302 are provided outside the injection tube 102. The output end of the first cylinders 302 is fixedly connected to the outer wall of the first mold 1. After the first mold 1 and the second mold 2 are closed, the first injection cavity 101 and the second injection cavity 201 are closed to form an injection molding cavity. The injection tube 102 is used to transport the injection material of the injection molded product into the injection molding cavity between the first injection cavity 101 of the first mold 1 and the second injection cavity 201 of the second mold 2.

[0026] The first support plate 301 supports the first ejector rod 5 and the first cylinder 302. The first support plate 301 is fixedly installed on the injection molding equipment. The first cylinder 302 is adjusted to extend and retract, which drives the first mold 1 to perform linear reciprocating motion, realizing the mold closing and demolding operations of the first mold 1 and the second mold 2. When the first mold 1 is adjusted to perform linear motion, the first ejector rod 5 does not move, but the first through hole 6 on the first mold 1 and the first ejector rod 5 are relatively displaced. When the first mold 1 is closed with the second mold 2, the first ejector rod 5 and the inner side of the first through hole 6 are pulled apart, and one end of the first ejector rod 5 is connected to the first through hole 6 on the inner wall of the first injection cavity 101. With the ends flush, the first ejector rod 5 is located inside the first through hole 6, and the first ejector rod 5 does not enter the first injection cavity 101. The first ejector rod 5 closes the first through hole 6, which can effectively prevent the first ejector rod 5 from affecting the normal injection molding process of the injection molded product. When disassembling the first mold 1 and the second mold 2, the first cylinder 302 is adjusted to retract, and the first mold 1 moves towards the first support plate 301. The first ejector rod 5 remains stationary, and the first through hole 6 of the first mold 1 moves with the first mold 1, so that the first ejector rod 5 passes through the first through hole 6 and enters the first injection cavity 101 to eject the injection molded product. This can realize automatic ejection operation during the demolding process.

[0027] In one embodiment, the second linear drive mechanism 4 includes a second support plate 401, a second ejector rod 7 disposed on one side of the outer wall of the second support plate 401, and a second cylinder 402 disposed at the center of the outer wall of the second support plate 401 away from the second ejector rod 7. The output end of the second cylinder 402 is fixedly connected to the center of the outer wall of the second mold 2. The second support plate 401 is used to support the second cylinder 402 and the second ejector rod 7. The second support plate 401 is fixedly installed on the injection molding equipment. Adjusting the extension and retraction of the second cylinder 402 drives the second mold 2 to perform linear reciprocating motion, which can realize the mold closing and mold opening operations of the first mold 1 and the second mold 2. When the second mold 2 is adjusted for linear motion, the second ejector rod 7 does not move, but the second through hole 8 on the second mold 2 and the second ejector rod 7 are relatively displaced. When the first mold 1 closes with the second mold 2, the second ejector pin 7 and the inner side of the second through hole 8 are pulled out. One end of the second ejector pin 7 is flush with the end of the second through hole 8 on the inner wall of the second injection cavity 201. At this time, the second ejector pin 7 is located inside the second through hole 8 and does not enter the interior of the second injection cavity 201. The second ejector pin 7 closes the second through hole 8, which can effectively prevent the second ejector pin 7 from affecting the normal injection molding process of the injection molded product. When disassembling the first mold 1 and the second mold 2, the second cylinder 402 is adjusted to retract, and the second mold 2 moves towards the second support plate 401. The second ejector pin 7 remains stationary, and the second through hole 8 of the second mold 2 moves with the second mold 2, so that the second ejector pin 7 passes through the second through hole 8 and enters the interior of the second injection cavity 201 to eject the injection molded product. This can realize automatic ejection operation during the demolding process.

[0028] In one embodiment, the length of the first ejector rod 5 is greater than the thickness of the first mold 1, and the length of the second ejector rod 7 is equal to the thickness of the second mold 2. Limiting the lengths of the first ejector rod 5 and the second ejector rod 7 ensures that the first ejector rod 5 can be inserted into the first mold 1 to eject the injection-molded product outwards, and that the second ejector rod 7 can be inserted into the second mold 2 to eject the injection-molded product outwards. The length of the first ejector rod 5 is less than half the distance between the first support plate 301 and the second support plate 401, and the length of the second ejector rod 7 is less than half the distance between the first support plate 301 and the second support plate 401. Limiting the lengths of the first ejector rod 5 and the second ejector rod 7 effectively ensures that there is a spatial channel between the first ejector rod 5 and the second ejector rod 7, allowing the injection-molded product to be removed from the spatial channel between the first ejector rod 5 and the second ejector rod 7. This effectively prevents the injection-molded product from being blocked by the first ejector rod 5 and the second ejector rod 7 and unable to be removed.

[0029] The working principle of this utility model:

[0030] Refer to the instruction manual appendix Figures 1-5This utility model, by setting up a first mold 1, a second mold 2, a first linear drive mechanism 3, a second linear drive mechanism 4, a first ejector pin 5, a first through hole 6, a second ejector pin 7, and a second through hole 8, provides injection space for the injection molded product. The first linear drive mechanism 3 is used to adjust the linear motion of the first mold 1, and the second linear drive mechanism 4 is used to adjust the linear motion of the second mold 2, enabling mold closing and demolding operations of the first mold 1 and the second mold 2. Both the first mold 1 and the second mold 2 are designed as moving molds, so that the first mold 1 and the second mold 2 can be adjusted in motion during mold closing and demolding. When the first mold 1 is adjusted in motion, the first ejector pin 5 and the first through hole 6 are relatively displaced. When the second mold 2 is adjusted in motion, the second ejector pin 7 and the second through hole 8 are relatively displaced. When the mold is demolded, the first ejector pin 5 and the second ejector pin 7 can automatically eject the injection molded product.

[0031] During mold closing, the first mold 1 and the second mold 2 move towards each other. One end of the first ejector pin 5 is flush with the end of the first through hole 6 on the inner wall of the first injection cavity 101. At this time, the first ejector pin 5 is located inside the first through hole 6, and the first ejector pin 5 does not enter the interior of the first injection cavity 101. The first ejector pin 5 closes the first through hole 6, effectively preventing the first ejector pin 5 from affecting the normal injection molding process of the injection molded product. One end of the second ejector pin 7 is flush with the end of the second through hole 8 on the inner wall of the second injection cavity 201. At this time, the second ejector pin 7 is located inside the second through hole 8, and the second ejector pin 7 does not enter the interior of the second injection cavity 201. The second ejector pin 7 closes the second through hole 8, effectively preventing the first ejector pin 5 from affecting the normal injection molding process of the injection molded product. This effectively prevents the second ejector pin 7 from affecting the normal injection molding process of the injection molded product. During demolding, the first mold 1 and the second mold 2 move away from each other. The first ejector pin 5 remains stationary, and the first through hole 6 of the first mold 1 moves with the first mold 1, allowing the first ejector pin 5 to pass through the first through hole 6 and enter the first injection cavity 101 to eject the injection molded product. This enables automatic ejection during demolding. The second ejector pin 7 remains stationary, and the second through hole 8 of the second mold 2 moves with the second mold 2, allowing the second ejector pin 7 to pass through the second through hole 8 and enter the second injection cavity 201 to eject the injection molded product. This also enables automatic ejection during demolding.

[0032] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A mould for injection-moulded articles that can be automatically ejected, comprising a first mould (1) and a second mould (2) that cooperate with each other, characterised in that: The outer wall of the first mold (1) is provided with a first linear drive mechanism (3) on the side away from the second mold (2), and the outer wall of the second mold (2) is provided with a second linear drive mechanism (4) on the side away from the first mold (1). The outer wall of the first linear drive mechanism (3) is provided with a plurality of first ejector rods (5) on the side close to the first mold (1). The surface of the first mold (1) is provided with a first through hole (6) that matches the first ejector rod (5). The outer wall of the second linear drive mechanism (4) is provided with a plurality of second ejector rods (7) on the side close to the second mold (2). The surface of the second mold (2) is provided with a second through hole (8) that matches the second ejector rod (7).

2. A mold for automatically ejecting an injection molded article according to claim 1, characterized in that: The first mold (1) has a first injection cavity (101) on the outer wall near the second mold (2), and the first through hole (6) is located inside the first injection cavity (101). The second mold (2) has a second injection cavity (201) on the outer wall near the first mold (1), and the second through hole (8) is located inside the second injection cavity (201).

3. A mold for automatically ejecting an injection molded article according to claim 2, wherein: Two first push rods (5) and two second push rods (7) are provided, and the line connecting the two first push rods (5) is perpendicular to the line connecting the two second push rods (7).

4. A mold for automatically ejecting an injection molded article according to claim 1, wherein: An injection tube (102) is provided on the outer wall of the first mold (1) away from the center of the second mold (2). The first linear drive mechanism (3) includes a first support plate (301). The injection tube (102) passes through the first support plate (301) and extends to the outside of the first support plate (301). The outer wall of the injection tube (102) is slidably connected to the first support plate (301). The first push rod (5) is provided on one side of the outer wall of the first support plate (301). On the other side of the outer wall of the first support plate (301), a plurality of first cylinders (302) are provided on the outside of the injection tube (102). The output end of the first cylinder (302) is fixedly connected to the outer wall of the first mold (1).

5. A mold for automatically ejecting an injection molded article according to claim 4, wherein: The second linear drive mechanism (4) includes a second support plate (401), the second push rod (7) is located on one side of the outer wall of the second support plate (401), and a second cylinder (402) is located at the center of the outer wall of the second support plate (401) away from the second push rod (7). The output end of the second cylinder (402) is fixedly connected to the center of the outer wall of the second mold (2).

6. A mold for automatically ejecting an injection molded article according to claim 5, wherein: The length of the first ejector pin (5) is greater than the thickness of the first mold (1), and the length of the second ejector pin (7) is equal to the thickness of the second mold (2). The length of the first ejector pin (5) is less than half the distance between the first support plate (301) and the second support plate (401), and the length of the second ejector pin (7) is less than half the distance between the first support plate (301) and the second support plate (401).

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