Injection mold with ejection structure

Abstract

The utility model relates to an injection mold with an ejection structure, which comprises a lower mold, an upper mold and a multi-stage ejection mechanism, the upper mold is arranged above the lower mold, a positioning rod is fixedly mounted at the bottom of the upper mold, a positioning hole is formed in the top of the lower mold, the positioning rod is inserted into the positioning hole, and the multi-stage ejection mechanism is connected with the lower mold. The multi-stage ejection mechanism is arranged in an inner cavity of the lower mold and can eject out a model, and the buffer mechanism is arranged between the multi-stage ejection mechanism and the lower mold. The multi-stage ejection mechanism is adopted, multi-stage ejection of a product is achieved through cooperation of the first-stage ejector pin and the second-stage ejector pin, the design can ensure that the product is completely ejected out of a mold, the situation that the product adheres to the mold is reduced, the production efficiency is improved, the buffering function is provided in the ejection process through the arrangement of the buffering mechanism, and the product quality is improved. The damage to the mold or a product caused by too fast ejection or too large force is effectively prevented, and the service life of the mold is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, in particular to an injection mold with an ejection structure. Background Art

[0002] Existing injection molds often encounter the problem of products sticking to the mold during the product ejection process, which not only requires extra time and labor to clean the mold and remove the product, thereby significantly extending the production cycle and reducing production efficiency, but what is worse is that forced removal of stuck products often causes scratches, breakage or deformation on the product surface, greatly reducing the product's appearance quality and usability. In addition, existing injection molds lack the necessary buffer protection mechanism. During the ejection process, due to excessive ejection speed or excessive force, mold parts are prone to wear and even cracking, and the product surface is also extremely susceptible to damage and deformation. These problems not only increase the maintenance cost of the mold, but also seriously affect the overall quality and appearance of the product. Utility Model Content

[0003] The purpose of the utility model is to provide an injection mold with an ejection structure, which not only has an efficient ejection function and can quickly eject the product from the mold to improve production efficiency, but also effectively prevents damage to the mold or product caused by ejection too quickly or with too much force through a buffer mechanism, thereby solving the problems raised by the above-mentioned background technology.

[0004] To achieve the above object, the utility model provides the following technical solution: comprising: a lower mold, and also comprising an upper mold, wherein the upper mold is arranged above the lower mold, a positioning rod is fixedly installed at the bottom of the upper mold, a positioning hole is arranged at the top of the lower mold, and the positioning rod is inserted into the interior of the positioning hole;

[0005] A multi-stage ejection mechanism, which is arranged in the inner cavity of the lower mold and can eject the model;

[0006] The buffer mechanism is arranged between the multi-stage ejection mechanism and the lower mold.

[0007] Furthermore, as a preferred embodiment of the utility model, the multi-stage ejection mechanism includes a first lifting block fixedly installed on the bottom of the lower mold, a cavity is arranged inside the first lifting block, a first cylinder connecting pipe is fixedly connected to the side of the first lifting block, a lifting rod is arranged on the top of the first lifting block, and the first cylinder connecting pipe and the lifting rod are both connected to the cavity.

[0008] Furthermore, as a preferred embodiment of the utility model, the inner wall of the lower mold is symmetrically provided with sliding grooves, the top of the lifting rod is fixedly connected to a second lifting block, both sides of the second lifting block are fixedly installed with sliding blocks, and the sliding blocks are slidably installed in the inner cavity of the sliding groove.

[0009] Furthermore, as a preferred embodiment of the utility model, a cavity is provided inside the second lifting block, a secondary ejector is provided inside the cavity, the secondary ejector extends to the outside through a through hole at the top of the second lifting block, a second cylinder connecting pipe is provided on the side of the second lifting block, and a primary ejector is provided on the top of the second lifting block.

[0010] Furthermore, as a preferred embodiment of the utility model, the buffer mechanism includes fixed columns fixedly installed at the four corners of the top of the second lifting block, the top of the fixed column is inserted into the reserved hole in the inner cavity of the lower mold, and the outer side of the fixed column is sleeved with a spring.

[0011] Furthermore, as a preferred embodiment of the present invention, a pinhole is provided on the top of the lower mold, fixing grooves are provided on both sides of the lower mold, and an injection port is provided on the top of the upper mold.

[0012] Beneficial effects. The technical solution of the present application has the following technical effects: the utility model adopts a multi-stage ejection mechanism, and realizes multi-stage ejection of the product through the cooperation of the first-level ejector pin and the second-level ejector pin. This design can ensure that the product is completely ejected from the mold, reduce the situation of product sticking to the mold, and improve production efficiency. The setting of the buffer mechanism provides a buffering effect during the ejection process, effectively preventing damage to the mold or product caused by ejecting too quickly or with too much force, extending the service life of the mold, and improving product quality and production safety. After the ejection is completed, the spring in the buffer mechanism can release the stored energy to assist the second lifting block to quickly return to the initial position, prepare for the next injection molding process, and improve production efficiency.

[0013] It should be appreciated that all combinations of the foregoing concepts, as well as additional concepts described in greater detail below, may be considered part of the inventive subject matter of the present disclosure, provided such concepts are not mutually inconsistent. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 This is a cross-sectional view of the lower mold of the utility model;

[0017] Figure 3 This is a schematic diagram of mold separation of the utility model;

[0018] Figure 4This is a top view of the lower mold of the utility model;

[0019] Figure 5 It is a local structural stereogram of the utility model.

[0020] In the figure, the meanings of the various reference numerals are as follows: 1. lower mold; 2. upper mold; 3. positioning rod; 4. positioning hole; 5. multi-stage ejector mechanism; 501. first lifting block; 502. first cylinder connecting pipe; 503. lifting rod; 504. second lifting block; 505. first-level ejector pin; 506. second-level ejector pin; 507. second cylinder connecting pipe; 6. slide groove; 7. slider; 8. buffer mechanism; 801. fixed column; 802. spring; 9. ejector pin hole; 10. fixing groove; 11. injection port. DETAILED DESCRIPTION

[0021] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined purpose of the utility model, the specific implementation method, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0022] As attached Figure 1 To Attachment Figure 5 As shown: This embodiment provides an injection mold with an ejection structure, including: a lower mold 1, and an upper mold 2, the upper mold 2 is arranged above the lower mold 1, a positioning rod 3 is fixedly installed at the bottom of the upper mold 2, and a positioning hole 4 is arranged on the top of the lower mold 1, and the positioning rod 3 is inserted into the inside of the positioning hole 4;

[0023] A multi-stage ejection mechanism 5, which is arranged in the inner cavity of the lower mold 1 and can eject the model;

[0024] The buffer mechanism 8 is arranged between the multi-stage ejection mechanism 5 and the lower mold 1 .

[0025] Specifically, the multi-stage ejection mechanism 5 includes a first lifting block 501 fixedly installed at the bottom of the lower mold 1, a cavity is arranged inside the first lifting block 501, a first cylinder connecting pipe 502 is fixedly connected to the side of the first lifting block 501, a lifting rod 503 is arranged on the top of the first lifting block 501, and the first cylinder connecting pipe 502 and the lifting rod 503 are both connected to the cavity.

[0026] In this embodiment: the lower mold 1 and the upper mold 2 together constitute the main part of the mold, which is used to form the shape of the product during the injection molding process. The positioning rod 3 and the positioning hole 4 ensure that the upper mold 2 and the lower mold 1 can be accurately aligned when the mold is closed to prevent product defects caused by misalignment. When the upper mold 2 and the lower mold 1 are closed, a closed cavity is formed. The plastic melt is cooled and solidified in this cavity to form a product. After the injection molding is completed, the multi-stage ejection mechanism 5 is responsible for ejecting the product from the mold to facilitate the removal of the product. The first cylinder connecting pipe 502 connected to the cylinder applies a lifting force to the lifting rod 503, and the lifting rod 503 drives the second lifting block 504 to move upward together, and at the same time drives the first-level ejector 505 on the top of the second lifting block 504 to perform the initial ejection of the product.

[0027] Specifically, the inner wall of the lower mold 1 is symmetrically provided with a slide groove 6, the top of the lifting rod 503 is fixedly connected to the second lifting block 504, and sliders 7 are fixedly installed on both sides of the second lifting block 504. The sliders 7 are slidably installed in the inner cavity of the slide groove 6, and a cavity is provided inside the second lifting block 504. A secondary ejector 506 is provided inside the cavity, and the secondary ejector 506 extends to the outside through the through hole at the top of the second lifting block 504, a second cylinder connecting pipe 507 is provided on the side of the second lifting block 504, and a primary ejector 505 is provided on the top of the second lifting block 504.

[0028] In this embodiment: the slide groove 6 provides a movement track for the slider 7, ensuring the stability of the second lifting block 504 during the ejection process. When the second lifting block 504 moves upward to a certain position, a lifting force is applied to the secondary ejector 506 through the second cylinder connecting pipe 507 connected to the cylinder to eject the product for the second time. Through the cooperation of the first lifting block 501 and the second lifting block 504, combined with the coordination of the first cylinder connecting pipe 502, the second cylinder connecting pipe 507, the lifting rod 503, the slider 7, the secondary ejector 506 and the primary ejector 505, a multi-stage ejection function is achieved.

[0029] Specifically, the buffer mechanism 8 includes fixed columns 801 fixedly installed at the four corners of the top of the second lifting block 504 , the top of the fixed column 801 is inserted into the reserved hole of the inner cavity of the lower mold 1 , and the outer side of the fixed column 801 is sleeved with a spring 802 .

[0030] In this embodiment: the buffer mechanism 8 provides buffering during the ejection process to prevent damage to the mold or product due to ejection too quickly or with too much force. When the second lifting block 504 moves upward, the spring 802 is compressed to play a buffering role; when the second lifting block 504 returns to its original position downward, the spring 802 releases energy to assist the second lifting block 504 in returning to its original position, thereby effectively protecting the mold and product and improving production efficiency and product quality.

[0031] Specifically, an ejector hole 9 is provided at the top of the lower mold 1 , fixing grooves 10 are provided on both sides of the lower mold 1 , and an injection port 11 is provided at the top of the upper mold 2 .

[0032] In this embodiment, the ejector hole 9 is used for extending and retracting the ejector to facilitate the removal of the product, the fixing groove 10 is used to fix the mold with other components, and the plastic melt is injected into the mold cavity through the injection port 11.

[0033] The working principle and use process of this utility model:

[0034] The upper mold 2 and the lower mold 1 are molded together by the precise cooperation of the positioning rod 3 and the positioning hole 4 to ensure the precise alignment of the molds and prevent product defects caused by misalignment. After the molds are closed, a closed cavity is formed between the upper mold 2 and the lower mold 1, and the plastic melt is injected into the closed cavity through the injection port 11, and is cooled and solidified therein to form a product. When the injection molding is completed, the ejection process begins. The first cylinder connecting pipe 502 is connected to the cylinder, and a lifting force is applied to the cavity of the first lifting block 501 through the cylinder. The lifting force is transmitted to the second lifting block 504 through the lifting rod 503, driving the second lifting block 504 to move upward under the guidance of the slide groove 6 and the slider 7. When the second lifting block 504 moves upward to a certain position, the primary ejector 50 First, the first ejector pin 505 extends out through the ejector hole 9 to eject the product for the first time. After the first ejector pin 505 is ejected for the first time, the second cylinder connecting pipe 507 is connected to another cylinder, and the second ejector pin 506 is provided with a lifting force through the cylinder to eject the product for the second time, so as to ensure that the product is completely separated from the mold cavity. The buffer mechanism 8 plays a buffering role in the process of the second ejector block 504 moving upward. When the second ejector block 504 moves upward, the spring 802 outside the fixed column 801 is compressed to absorb part of the lifting force to prevent the mold or product from being damaged due to excessive ejection or excessive force. When the ejection process is completed, the spring 802 releases the stored energy to assist the second ejector block 504 to return to the initial position to prepare for the next injection molding process.

[0035] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. An injection mold with an ejection structure, comprising: The lower mold (1) is characterized in that it also includes an upper mold (2), the upper mold (2) is arranged above the lower mold (1), a positioning rod (3) is fixedly installed at the bottom of the upper mold (2), a positioning hole (4) is arranged at the top of the lower mold (1), and the positioning rod (3) is inserted into the inside of the positioning hole (4); A multi-stage ejection mechanism (5), wherein the multi-stage ejection mechanism (5) is arranged in the inner cavity of the lower mold (1) and is capable of ejecting the model; A buffer mechanism (8), wherein the buffer mechanism (8) is arranged between the multi-stage ejection mechanism (5) and the lower mold (1).

2. The injection mold with an ejection structure according to claim 1, characterized in that: The multi-stage ejection mechanism (5) comprises a first lifting block (501) fixedly mounted on the bottom of the lower mold (1), a cavity being arranged inside the first lifting block (501), a first cylinder connecting pipe (502) being fixedly connected to the side of the first lifting block (501), a lifting rod (503) being arranged on the top of the first lifting block (501), and both the first cylinder connecting pipe (502) and the lifting rod (503) being connected to the cavity.

3. The injection mold with an ejection structure according to claim 2, characterized in that: The inner wall of the lower mold (1) is symmetrically provided with slide grooves (6); the top of the lifting rod (503) is fixedly connected to a second lifting block (504); sliding blocks (7) are fixedly installed on both sides of the second lifting block (504); and the sliding blocks (7) are slidably installed in the inner cavity of the slide groove (6).

4. The injection mold with an ejection structure according to claim 3, characterized in that: A cavity is provided inside the second lifting block (504), and a secondary ejector pin (506) is provided inside the cavity. The secondary ejector pin (506) extends to the outside through a through hole at the top of the second lifting block (504).

5. The injection mold with an ejection structure according to claim 3, characterized in that: A second cylinder connecting pipe (507) is provided on the side of the second lifting block (504), and a first-level ejector pin (505) is provided on the top of the second lifting block (504).

6. The injection mold with an ejection structure according to claim 1, characterized in that: The buffer mechanism (8) comprises fixed columns (801) fixedly mounted at the four corners of the top of the second lifting block (504), the top ends of the fixed columns (801) being inserted into reserved holes in the inner cavity of the lower mold (1), and the outer sides of the fixed columns (801) being sleeved with springs (802).

7. The injection mold with an ejection structure according to claim 1, characterized in that: An ejector hole (9) is provided at the top of the lower mold (1), fixing grooves (10) are provided on both sides of the lower mold (1), and an injection port (11) is provided at the top of the upper mold (2).

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