Linkage mechanism for injection mold

Abstract

This utility model discloses a linkage mechanism for injection molds, belonging to the field of injection mold technology. It includes a support base, with a support platform fixedly connected to the top center of the support base. A first mold base is fixedly installed on the top of the support platform. An ejector plate is slidably connected inside the first mold base. A second mold base is tightly engaged with the top of the first mold base. A lifting rod can push the second mold base to move up and down. The lifting plate can push the ejector plate to move up and down via the ejector rod. A support plate is fixedly connected to the outer wall of the back of the first mold base, and an auxiliary ejector plate is slidably inserted into the support plate. This utility model not only provides precise guidance for the movement of the second mold base, improving the stability of mold closing and opening operations and ensuring the quality of the molded product, but also automatically ejects the molded product, ensuring the ejection force and effectively improving demolding efficiency and work efficiency.

Description

Technical Field

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

[0002] Injection molds are tools used to produce plastic products. Specifically, they involve injecting molten material under high pressure into a mold cavity, where it cools and solidifies to form the molded product. A mold generally consists of two parts: a moving mold and a fixed mold. These two parts can be separated or joined together. When separated, the molded part can be removed; when joined together, the blank is injected into the mold cavity to form the product.

[0003] To address this, Chinese Patent CN220517449U discloses a linkage mechanism for an injection mold, comprising a lower mold and an upper mold. The lower mold has multiple molding cavities evenly and vertically formed on its top surface, and molding pillars are vertically inserted into each cavity. The bottom end of each molding pillar is fixed to the inner bottom surface of the molding cavity, and a top ring is vertically slidably fitted around the outside of the molding pillar. A guide rod is vertically fixed on the bottom surface of the top ring and vertically slidably inserted into a through hole. A horizontally positioned mechanism is located below the bottom surface of the lower mold. There is a support plate with a spring vertically fixed on its top surface. The top of the spring is fixed to the bottom surface of the lower mold. The upper mold can be raised and lowered and installed on the top surface of the lower mold. After the plastic tube is formed, it pushes the upper mold to move up on the lower mold. After the mold is opened, since the formed plastic tube lacks the pressure of the upper mold, the support plate, under the deformation force of the spring, pushes the top ring upward and pushes the formed plastic tube out of the forming cavity, thus automatically completing the demolding of the plastic tube. This avoids the need for manual demolding by hand, improves demolding efficiency, and enhances demolding safety.

[0004] However, the above-mentioned device only uses the deformation capacity of the spring to push the top ring to achieve automatic demolding. The spring wears out quickly, and the elasticity is consumed quickly, making it very easy to loosen. This will greatly reduce the ejection force, thus affecting the demolding efficiency. Utility Model Content

[0005] To address the problems existing in the prior art, this utility model provides a linkage mechanism for injection molds. This mechanism not only precisely guides the movement of the second mold base, improving the stability of mold closing and opening operations and ensuring the quality of the molded product, but also automatically ejects the molded product, ensuring sufficient ejection force and effectively improving demolding efficiency and overall work efficiency. It solves the problem in the prior art where automatic demolding is achieved solely through the deformation capacity of a spring to drive the ejector ring. This results in rapid spring wear and elasticity depletion, easily leading to loosening and significantly reducing the ejection force, thus affecting demolding efficiency.

[0006] This utility model is implemented as follows: a linkage mechanism for an injection mold includes a support base, a support platform fixedly connected to the top center of the support base, a first mold base fixedly installed on the top of the support platform, an ejector plate slidably connected inside the first mold base, a second mold base tightly engaged with the top of the first mold base, an injection port fixedly installed in the center of the second mold base, lifting plates fixedly connected to both sides of the second mold base, lifting rods fixedly connected to the bottom of each lifting plate, the lifting rods being able to push the second mold base to move up and down, the lifting plates being able to push the ejector plate to move up and down via the ejector rods, a support plate fixedly connected to the back outer wall of the first mold base, and an auxiliary unloading plate slidably inserted into the support plate.

[0007] As a preferred embodiment of this utility model, telescopic cylinders are fixedly installed on both inner sides of the bottom of the support base, and the output ends of the telescopic cylinders extend to the top of the support base. The output ends of the telescopic cylinders are fixedly connected to the corresponding lifting rods.

[0008] This design allows the telescopic cylinder to be activated to move the lifting rod up and down, which in turn moves the lifting plate and the second mold base up and down. This facilitates the mold closing and forming, and demolding operations between the second mold base and the first mold base, making it convenient to use.

[0009] As a preferred embodiment of this utility model, a first spring is sleeved on the lifting rod, and the upper and lower ends of the first spring are fixedly connected to the lifting plate and the support base, respectively.

[0010] This design facilitates the lifting rod to drive the lifting plate to move up and down stably, ensuring stable connection between the second mold base and the first mold base, and helping to guarantee the molding quality of the product.

[0011] As a preferred embodiment of this utility model, both ends of the bottom of the top plate are fixedly connected to a top rod. The top rod slides through the bottom of the first mold base and extends to both sides of the first mold base. The upper end of the top rod passes through the corresponding lifting plate, and a push plate is threaded onto the upper end of the top rod.

[0012] This setup facilitates a stable connection between the ejector rod, the first mold base, and the lifting plate. Through the cooperation between the lifting plate, the ejector rod, and the push plate, it not only precisely guides the movement of the second mold base but also drives the ejector plate to eject the molded product, achieving automatic demolding. This effectively avoids the reduction of the ejector demolding force, improves demolding efficiency, and thus helps to improve work efficiency.

[0013] When demolding is performed, the lifting rod pushes the lifting plate upward, causing the lifting plate and the second mold base to move upward along the ejector rod and separate from the first mold base. At this time, the lifting plate is in contact with the push plate. If it continues to move upward, the lifting plate will push the push plate upward, which in turn will cause the ejector rod and the ejector plate to move upward, so that the ejector plate ejects the molded product and separates from the mold cavity of the first mold base, realizing automatic demolding operation, saving time and effort.

[0014] As a preferred embodiment of this utility model, the lifting plate is provided with guide holes, and the top material rod passes through the corresponding guide holes.

[0015] This design improves the stability of the connection between the lifting plate and the top material rod, making it easier to precisely guide the movement of the lifting plate and to push the push plate to move the top material plate up and down, thus making it convenient to use.

[0016] As a preferred embodiment of this utility model, a handle rod is fixedly connected to the back of the auxiliary feeding plate, the handle rod slides through the support plate, and a second spring is sleeved on the handle rod. The two ends of the second spring are fixedly connected to the auxiliary feeding plate and the support plate, respectively.

[0017] With this setup, after the molded product is demolded, holding the handle and pushing it will move the auxiliary unloading plate and push the molded product on the top plate, facilitating its rapid unloading and enabling the next round of injection molding. This improves the continuity of injection molding and thus further enhances work efficiency.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows: Through the linkage between the lifting rod, lifting plate, ejector rod, push plate and ejector plate, it can not only accurately guide the movement of the second mold base, improve the stability of mold closing and mold opening operations, and help ensure the quality of the molded product, but also automatically demold and eject the molded product without the need for an additional power source, simplifying the demolding process and effectively improving demolding efficiency. Furthermore, the auxiliary unloading plate can also enable the molded product to be unloaded quickly, saving working time and thus improving work efficiency. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural schematic diagram provided in an embodiment of the present utility model;

[0020] Figure 2 This is a cross-sectional structural schematic diagram provided in an embodiment of the present utility model;

[0021] Figure 3 This is a side view structural diagram provided in an embodiment of the present utility model;

[0022] Figure 4 This is a schematic diagram of the second mold base structure provided in an embodiment of the present invention;

[0023] Figure 5 This is a schematic diagram of the top plate structure provided in an embodiment of the present utility model.

[0024] In the diagram: 1. Support base; 101. Support platform; 2. First mold base; 3. Second mold base; 301. Injection port; 302. Lifting plate; 303. First spring; 304. Guide hole; 4. Ejector plate; 401. Ejector rod; 402. Push plate; 5. Lifting rod; 501. Telescopic cylinder; 6. Auxiliary unloading plate; 601. Support plate; 602. Handle rod; 603. Second spring. Detailed Implementation

[0025] To further understand the utility model content, features and effects of this utility model, the following embodiments are provided, and detailed descriptions are given in conjunction with the accompanying drawings.

[0026] The structure of this utility model will now be described in detail with reference to the accompanying drawings.

[0027] refer to Figures 1 to 5 As shown in the figure, the linkage mechanism of the injection mold provided in this embodiment of the utility model includes a support base 1. A support platform 101 is fixedly connected to the top center of the support base 1. A first mold base 2 is fixedly installed on the top of the support platform 101. An ejector plate 4 is slidably connected inside the first mold base 2. A second mold base 3 is tightly engaged with the top of the first mold base 2. An injection port 301 is fixedly installed in the middle of the second mold base 3. Lifting plates 302 are fixedly connected to both sides of the second mold base 3. Lifting rods 5 are fixedly connected to the bottom of the lifting plates 302. The lifting rods 5 can push the second mold base 3 to move up and down. The lifting plates 302 can push the ejector plate 4 to move up and down through the ejector rod 401. A support plate 601 is fixedly connected to the outer wall of the back of the first mold base 2. An auxiliary unloading plate 6 is slidably inserted into the support plate 601.

[0028] Specifically, telescopic cylinders 501 are fixedly installed on both inner sides of the bottom of the support base 1. The output ends of the telescopic cylinders 501 extend to the top of the support base 1, and the output ends of the telescopic cylinders 501 are fixedly connected to the corresponding lifting rods 5.

[0029] Using the above scheme, the telescopic cylinder 501 is activated to facilitate the lifting rod 5 to move up and down, which in turn facilitates the lifting plate 302 and the second mold base 3 to move up and down, thereby facilitating the mold closing and forming and demolding operations between the second mold base 3 and the first mold base 2, making it convenient to use.

[0030] Specifically, a first spring 303 is sleeved on the lifting rod 5, and the upper and lower ends of the first spring 303 are fixedly connected to the lifting plate 302 and the support base 1, respectively.

[0031] The above scheme facilitates the stable up-and-down movement of the lifting rod 5 and the lifting plate 302, and facilitates the stable docking of the second mold base 3 and the first mold base 2, which helps to ensure the molding quality of the product.

[0032] Specifically, both ends of the bottom of the top plate 4 are fixedly connected with a top rod 401. The top rod 401 slides through the bottom of the first mold base 2 and extends to both sides of the first mold base 2. The upper end of the top rod 401 passes through the corresponding lifting plate 302. The upper end of the top rod 401 is threaded with a push plate 402.

[0033] The above scheme facilitates a stable connection between the ejector rod 401 and the first mold base 2 and the lifting plate 302. Through the cooperation between the lifting plate 302, the ejector rod 401 and the push plate 402, not only can the movement of the second mold base 3 be precisely guided, but the ejector plate 4 can also be driven to eject the molded product to achieve automatic demolding. This effectively avoids the reduction of the ejection demolding force and improves the demolding efficiency, thereby helping to improve work efficiency.

[0034] When demolding is performed, the lifting rod 5 pushes the lifting plate 302 upward, causing the lifting plate 302 and the second mold base 3 to move upward along the ejector rod 401 and separate from the first mold base 2. At this time, the lifting plate 302 is in contact with the push plate 402. If it continues to move upward, the lifting plate 302 will push the push plate 402 upward, which will then drive the ejector rod 401 and the ejector plate 4 to move upward, so that the ejector plate 4 ejects the molded product and separates from the mold cavity of the first mold base 2, realizing automatic demolding operation, saving time and effort.

[0035] Specifically, the lifting plate 302 is provided with a guide hole 304, and the top material rod 401 passes through the corresponding guide hole 304.

[0036] The above solution improves the stability of the connection between the lifting plate 302 and the top material rod 401, which not only facilitates precise guidance of the movement of the lifting plate 302, but also facilitates the pushing plate 402 to realize the up and down movement of the top material plate 4, making it convenient to use.

[0037] Specifically, a handle rod 602 is fixedly connected to the back of the auxiliary feeding plate 6. The handle rod 602 slides through the support plate 601. A second spring 603 is sleeved on the handle rod 602. The two ends of the second spring 603 are fixedly connected to the auxiliary feeding plate 6 and the support plate 601, respectively.

[0038] Using the above scheme, after the molded product is demolded, hold the handle rod 602 and push it, which will drive the auxiliary unloading plate 6 to move and push the molded product located on the top plate 4, so as to facilitate its rapid unloading and facilitate the next round of injection molding. This is conducive to improving the continuity of injection molding and thus further improving work efficiency.

[0039] The working principle of this utility model:

[0040] In use, the injection plastic is injected into the second mold base 3 through the injection port 301 and enters the mold cavity of the first mold base 2. After injection molding, when demolding is performed, the telescopic cylinder 501 is activated, and the lifting rod 5 pushes the lifting plate 302 upward, which drives the lifting plate 302 and the second mold base 3 to move upward along the ejector rod 401 and separate from the first mold base 2. At this time, the lifting plate 302 is in contact with the push plate 402. If it continues to move upward, the lifting plate 302 will push the push plate 402 upward, which in turn drives the ejector rod 401 and the ejector plate 4 to move upward, so that the ejector plate 4 ejects the molded product and separates from the mold cavity of the first mold base 2, realizing automatic demolding operation, saving time and effort. Then, hold the handle rod 602 and push it, which will drive the auxiliary unloading plate 6 to move and push the molded product located on the ejector plate 4, which facilitates its rapid unloading and facilitates the rapid progress of the next round of injection molding, improving work efficiency.

[0041] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0042] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art 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 appended claims and their equivalents.

Claims

1. A linkage mechanism for an injection mold, comprising a support base (1), characterized in that: A support platform (101) is fixedly connected to the top center of the support base (1). A first mold base (2) is fixedly installed on the top of the support platform (101). A top material plate (4) is slidably connected inside the first mold base (2). A second mold base (3) is tightly clamped to the top of the first mold base (2). An injection port (301) is fixedly installed in the middle of the second mold base (3). Lifting plates (302) are fixedly connected to both sides of the second mold base (3). Lifting rods (5) are fixedly connected to the bottom of the lifting plates (302). The lifting rods (5) can push the second mold base (3) to move up and down. The lifting plates (302) can push the top material plate (4) to move up and down through the top material rod (401). A support plate (601) is fixedly connected to the outer wall of the back of the first mold base (2). An auxiliary unloading plate (6) is slidably inserted on the support plate (601).

2. The linkage mechanism of an injection mold as described in claim 1, characterized in that: Telescopic cylinders (501) are fixedly installed on both inner sides of the bottom of the support base (1). The output ends of the telescopic cylinders (501) extend to the top of the support base (1). The output ends of the telescopic cylinders (501) are fixedly connected to the corresponding lifting rods (5).

3. The linkage mechanism of an injection mold as described in claim 1, characterized in that: The lifting rod (5) is fitted with a first spring (303), and the upper and lower ends of the first spring (303) are fixedly connected to the lifting plate (302) and the support base (1), respectively.

4. The linkage mechanism of an injection mold as described in claim 1, characterized in that: The top plate (4) has a top rod (401) fixedly connected to both ends of the bottom. The top rod (401) slides through the bottom of the first mold base (2) and extends to both sides of the first mold base (2). The upper end of the top rod (401) passes through the corresponding lifting plate (302). The upper end of the top rod (401) is threaded with a push plate (402).

5. The linkage mechanism of an injection mold as described in claim 1, characterized in that: The lifting plate (302) has a guide hole (304), and the top material rod (401) passes through the corresponding guide hole (304).

6. The linkage mechanism of an injection mold as described in claim 1, characterized in that: A handle rod (602) is fixedly connected to the back of the auxiliary feeding plate (6). The handle rod (602) slides through the support plate (601). A second spring (603) is sleeved on the handle rod (602). The two ends of the second spring (603) are fixedly connected to the auxiliary feeding plate (6) and the support plate (601) respectively.

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