A mold injection molding equipment with ejection function

Abstract

This utility model discloses a mold injection molding equipment with ejection function, belonging to the technical field of injection molding equipment. It includes a fixed mold, a moving mold, a hydraulic cylinder, an ejection assembly, a support frame, a guide rod, an ejector pin, and a spring. In this utility model, adjusting the extension of the hydraulic cylinder allows for mold closing between the fixed and moving molds. The moving mold pushes the guide rod inward, which in turn pushes the support frame inward. The spring stretches, and the support frame moves the ejector pin inward, causing it to move out from the inside of the fixed mold core. Simultaneously, the ejector pin seals the through hole of the fixed mold core before injection molding. After injection molding is complete, the hydraulic cylinder retracts to disassemble the fixed and moving molds. The clamping force of the moving mold on the guide rod gradually decreases, the spring gradually rebounds, and the ejector pin, under the rebound of the spring, gradually ejects the injection molded part outward, effectively preventing damage to the injection molded part during the ejection process.

Description

Technical Field

[0001] This utility model relates to the field of injection molding equipment technology, specifically to a mold injection molding equipment with an ejection function. 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 located at the lower part of the demolding bracket, and a hydraulic cylinder is located at the upper part. The output end of the hydraulic cylinder is fixedly connected to a moving mold. Two demolding mechanisms are installed on each of the 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, the hydraulic cylinder drives the moving mold and the ejector mold 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 a pneumatic cylinder pushes a support plate to clamp the injection molded part until a sliding rod touches the top plate. Simultaneously, an electric push rod pushes the support plate downwards. The demolding process can be completed under the action of thrust, pull, and gravity, improving demolding efficiency. After demolding, the injection molded part falls onto the support plate, preventing damage from material loss and improving the yield rate.

[0004] The rapid demolding assembly of the injection molding machine in the aforementioned patent assists in demolding the injection molded part by setting up cylinders and clamping components. However, this demolding method requires the injection molded part to fall down along the moving mold under its own weight first, then the injection molded part is clamped, and finally the injection molded part is pulled down to demold. This demolding method has relatively complex operation steps, and the initial steps depend on the weight of the injection molded part itself and the friction between it and the moving mold, which makes the demolding operation highly uncertain and results in low accuracy. Utility Model Content

[0005] The purpose of this invention is to provide a mold injection molding equipment with an ejection function 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 injection molding equipment with ejection function, including a hydraulic cylinder and a matching fixed mold and a moving mold, the fixed mold and the moving mold being movably connected by the hydraulic cylinder, a fixed mold core being provided on the outer wall of the fixed mold near the moving mold, an ejection assembly being provided inside the fixed mold away from the moving mold, the ejection assembly including a support frame, a plurality of guide rods being provided on the outer wall of the support frame outside the fixed mold core, a plurality of ejector rods being provided on the outer wall of the support frame near the fixed mold core, and a plurality of springs being provided on the outer wall of the support frame, the guide rods, ejector rods and springs being parallel to the hydraulic cylinder, the guide rods extending to the outer side of the fixed mold, and a through hole matching the ejector rods being opened on the outer wall of the fixed mold core.

[0007] Furthermore, the support frame has a cross-shaped structure, the guide rods are respectively located at the four corners of the outer wall of the support frame, the top rods are evenly distributed on the outer wall of the support frame, and the length of the guide rods is greater than the length of the top rods.

[0008] Furthermore, the ejection assembly also includes a guide frame, which is fixedly connected to the inner wall of the fixed mold. The guide frame is disposed between the support frame and the fixed mold core, and the spring is disposed between the guide frame and the support frame.

[0009] Furthermore, the top of the guide frame is provided with a first through groove that matches the guide rod, and the outer wall of the guide frame is provided with a linear bearing that matches the top rod.

[0010] Furthermore, the spring is sleeved on the outside of the top rod, and both ends of the spring are fixedly connected to the support frame and the linear bearing, respectively.

[0011] Furthermore, the outer wall of the fixed mold is provided with a second through groove that matches the guide rod, and the outer wall of the moving mold is provided with a pressure rod that matches the second through groove.

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

[0013] 1. This utility model comprises a fixed mold, a moving mold, a hydraulic cylinder, an ejector assembly, a support frame, a guide rod, a push rod, and a spring. The hydraulic cylinder extends and closes the fixed and moving molds. The moving mold contacts and abuts the guide rod in the ejector assembly, pushing the guide rod inward. The guide rod drives the support frame inward, the spring stretches, and the support frame moves the push rod inward. When the fixed and moving molds are closed, the push rod moves out from the inside of the fixed mold core, simultaneously sealing the through hole of the fixed mold core. The mold is sealed and then injection molded. After injection molding is completed, the hydraulic cylinder retracts and disassembles the fixed mold and the moving mold. The clamping force of the moving mold on the guide rod gradually decreases, the spring gradually rebounds, and the support frame gradually resets under the action of the spring. The support frame pushes the ejector rod outward. The ejector rod passes through the through hole and enters the inside of the fixed mold core to push the injection molded part outward. Under the rebound of the spring, the ejector rod gradually pushes the injection molded part outward. This operation can effectively avoid damage to the injection molded part during the ejection process.

[0014] 2. In this utility model, the fixed mold and the moving mold cooperate to form an injection molding space. The fixed mold core in the fixed mold and the moving mold core in the moving mold cooperate to form an injection molding space. The extension and retraction of the hydraulic cylinder can drive the fixed mold and the moving mold to perform mold closing and opening operations, which is convenient and quick. The ejection assembly is used to eject the injection molded part in the fixed mold core. The support frame supports the guide rod and the ejector rod. By pushing the guide rod, the guide rod can drive the ejector rod to move through the support frame. The ejector rod can block the through hole of the fixed mold core. The ejector rod can extend and retract at the through hole of the fixed mold core, thereby ejecting the injection molded part inside the fixed mold core. The spring provides elastic support to the support frame, so that the guide rod and the ejector rod can perform elastic reset work, realizing the elastic ejection operation of the injection molded part, which can effectively avoid damage to the injection molded part caused by excessive ejection force. 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 ejection assembly of this utility model;

[0018] Figure 3 This is a structural schematic diagram of the support frame, guide rod, and top rod of this utility model;

[0019] Figure 4 This is a schematic diagram of the structure of the guide frame of this utility model;

[0020] In the diagram: 1. Fixed mold; 2. Moving mold; 3. Hydraulic cylinder; 4. Ejection assembly; 401. Support frame; 402. Guide rod; 403. Ejector rod; 404. Spring; 405. Guide frame; 406. First through slot; 407. Linear bearing. Detailed Implementation

[0021] 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.

[0022] Please see Figures 1-4 This utility model provides a technical solution: a mold injection molding equipment with ejection function, including a hydraulic cylinder 3 and a matching fixed mold 1 and a moving mold 2. The fixed mold 1 and the moving mold 2 are movably connected by the hydraulic cylinder 3. A fixed mold core is provided on the outer wall of the fixed mold 1 near the moving mold 2. An ejection assembly 4 is provided inside the fixed mold 1 on the side away from the moving mold 2. The ejection assembly 4 includes a support frame 401. A plurality of guide rods 402 are provided on the outer wall of the support frame 401 outside the fixed mold core. A plurality of ejector rods 403 are provided on the outer wall of the support frame 401 near the fixed mold core. A plurality of springs 404 are provided on the outer wall of the support frame 401. The guide rods 402, ejector rods 403, and springs 404 are connected together. Springs 404 are parallel to hydraulic cylinders 3. Guide rods 402 extend to the outside of the fixed mold 1. The outer wall of the fixed mold core has through holes that match the ejector rods 403. The support frame 401 has a cross-shaped structure. Guide rods 402 are respectively located at the four corners of the outer wall of the support frame 401. Ejector rods 403 are evenly distributed on the outer wall of the support frame 401. The length of the guide rods 402 is greater than the length of the ejector rods 403. The ejection assembly 4 also includes a guide frame 405. The guide frame 405 is fixedly connected to the inner wall of the fixed mold 1. The guide frame 405 is located between the support frame 401 and the fixed mold core. Springs 404 are located between the guide frame 405 and the support frame 401.

[0023] In one embodiment, the top of the guide frame 405 is provided with a first through groove 406 that matches the guide rod 402. The first through groove 406 provides telescopic guiding space for the guide rod 402 on the surface of the guide frame 405, ensuring the stability and safety of the movement of the guide rod 402. The outer wall of the guide frame 405 is provided with a linear bearing 407 that matches the top rod 403. The linear bearing 407 provides telescopic guiding support for the top rod 403 on the outer wall of the guide frame 405, which can effectively ensure the safety and stability of the movement of the top rod 403.

[0024] In one embodiment, the spring 404 is sleeved on the outside of the push rod 403. The two ends of the spring 404 are fixedly connected to the support frame 401 and the linear bearing 407, respectively. Sleeving the spring 404 on the outer wall of the push rod 403 can effectively guide the compression and rebound motion of the spring 404, effectively prevent the spring 404 from bending and shifting, and ensure the stability of the movement of the push rod 403.

[0025] In one embodiment, the outer wall of the fixed mold 1 is provided with a second through groove that matches the guide rod 402, and the outer wall of the moving mold 2 is provided with a pressure rod that matches the second through groove. The second through groove provides telescopic space for the guide rod 402, which can effectively ensure that the guide rod 402 can extend out of the fixed mold 1, and ensure that the guide rod 402 can be pushed inward when the moving mold 2 and the fixed mold 1 are closed. The pressure rod can be inserted into the second through groove to push the guide rod 402 inward further, ensuring that the guide rod 402 pushes the push rod 403 inward through the support frame 401.

[0026] The working principle of this utility model:

[0027] Refer to the instruction manual appendix Figures 1-4 This utility model comprises a fixed mold 1, a moving mold 2, a hydraulic cylinder 3, an ejector assembly 4, a support frame 401, a guide rod 402, an ejector rod 403, and a spring 404. The fixed mold 1 and the moving mold 2 cooperate to form an injection molding space. The fixed mold core in the fixed mold 1 and the moving mold core in the moving mold 2 cooperate to form an injection molding space. The extension and retraction of the hydraulic cylinder 3 can drive the fixed mold 1 and the moving mold 2 to perform mold closing and opening operations, which is convenient and quick. The ejector assembly 4 is used to eject the injection molded part in the fixed mold core for demolding. The support frame 401 supports the guide rod 402 and the ejector rod 403. By pushing the guide rod 402, the guide rod 402 can drive the ejector rod 403 to move through the support frame 401. The ejector rod 403 can block the through hole of the fixed mold core and can extend and retract at the through hole of the fixed mold core, thereby ejecting the injection molded part inside the fixed mold core. The spring 404 provides elastic support to the support frame 401, so that the guide rod 402 and the ejector rod 403 can perform elastic reset work, realizing the elastic ejection operation of the injection molded part, which can effectively avoid damage to the injection molded part caused by excessive ejection force.

[0028] In use, the hydraulic cylinder 3 is extended, and it closes the fixed mold 1 and the moving mold 2. The moving mold 2 moves towards the fixed mold 1, and it contacts the guide rod 402 in the ejector assembly 4, pushing the guide rod 402 inward. The guide rod 402 drives the support frame 401 inward, and the spring 404 is stretched. The support frame 401 drives the ejector rod 403 inward. When the fixed mold 1 and the moving mold 2 are closed, the ejector rod 403 moves out from the inside of the fixed mold core. At the same time, the ejector rod 403 seals the through hole of the fixed mold core. Then, the injection molding process is performed between the fixed mold core in the fixed mold 1 and the moving mold core in the moving mold 2. After injection molding is completed, hydraulic cylinder 3 retracts, and hydraulic cylinder 3 performs mold disassembly processing on fixed mold 1 and moving mold 2. Moving mold 2 moves away from fixed mold 1, and the clamping force of moving mold 2 on guide rod 402 gradually decreases. Spring 404 gradually rebounds, and support frame 401 gradually resets under the action of spring 404. Support frame 401 pushes ejector rod 403 outward. Ejector rod 403 passes through the through hole and enters the inside of fixed mold core to push the injection molded part outward. Under the rebound action of spring 404, ejector rod 403 gradually pushes the injection molded part outward, which can effectively avoid damage to the injection molded part during the ejection operation.

[0029] The support frame 401 is designed with a cross-shaped structure, which reduces the space occupied by the telescopic movement of the support frame 401 inside the fixed mold 1, effectively reducing the impact of the ejector assembly 4 on the internal structure of the fixed mold 1 and ensuring rapid molding of injection molded parts in the fixed mold 1 and moving mold 2. The guide rods 402 are set at the four corners of the outer wall of the cross-shaped structure of the support frame 401, ensuring that the moving mold 2 can push the guide rods 402 inward when the moving mold 2 and the fixed mold 1 are closed, while effectively preventing the guide rods 402 from damaging the structure of the fixed mold core and ensuring the normal operation of the fixed mold core. The ejector rods 403 are evenly distributed. The cross-shaped outer wall of the support frame 401 effectively ensures that multiple ejector pins 403 are distributed in a cross shape to eject the injection molded part. During the ejection operation, the ejector pins 403 apply force in a cross shape on the outer wall of the injection molded part, which can effectively improve the safety and stability of the ejection operation. The guide rod 402 is designed to be longer than the ejector pin 403, so that the displacement operation of the guide rod 402 can ensure that the ejector pin 403 is ejected from the inside of the through hole of the fixed mold core and moved outward, avoiding the ejector pin 403 not being in place and affecting the structural shape of the injection molded part.

[0030] A guide frame 405 is designed in the ejection assembly 4. The guide frame 405 can guide the ejector rod 403 and the guide rod 402, which can effectively improve the safety and stability of the push-in and ejection operations of the guide rod 402 and the ejector rod 403. The spring 404 provides elastic support between the guide frame 405 and the support frame 401.

[0031] 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 mold injection molding equipment with ejection function, comprising a hydraulic cylinder (3) and a matching fixed mold (1) and a moving mold (2), characterized in that: The fixed mold (1) and the moving mold (2) are movably connected by a hydraulic cylinder (3). The fixed mold (1) has a fixed mold core on the side of its outer wall near the moving mold (2). The fixed mold (1) has an ejection assembly (4) on the side of its interior away from the moving mold (2). The ejection assembly (4) includes a support frame (401). The outer wall of the support frame (401) has several guide rods (402) on the outside of the fixed mold core. The outer wall of the support frame (401) has several push rods (403) on the side of its outer wall near the fixed mold core. The outer wall of the support frame (401) has several springs (404). The guide rods (402), push rods (403), and springs (404) are all parallel to the hydraulic cylinder (3). The guide rods (402) extend to the outside of the fixed mold (1). The outer wall of the fixed mold core has through holes that match the push rods (403).

2. The mold injection molding equipment with ejection function according to claim 1, characterized in that: The support frame (401) has a cross-shaped structure. The guide rods (402) are respectively located at the four corners of the outer wall of the support frame (401). The top rods (403) are evenly distributed on the outer wall of the support frame (401). The length of the guide rods (402) is greater than the length of the top rods (403).

3. The mold injection molding equipment with ejection function according to claim 1, characterized in that: The ejection assembly (4) further includes a guide frame (405), which is fixedly connected to the inner wall of the fixed mold (1). The guide frame (405) is located between the support frame (401) and the fixed mold core, and the spring (404) is located between the guide frame (405) and the support frame (401).

4. The mold injection molding equipment with ejection function according to claim 3, characterized in that: The top of the guide frame (405) is provided with a first through groove (406) that matches the guide rod (402), and the outer wall of the guide frame (405) is provided with a linear bearing (407) that matches the top rod (403).

5. A mold injection molding equipment with ejection function according to claim 4, characterized in that: The spring (404) is sleeved on the outside of the top rod (403), and the two ends of the spring (404) are fixedly connected to the support frame (401) and the linear bearing (407) respectively.

6. The mold injection molding equipment with ejection function according to claim 1, characterized in that: The outer wall of the fixed mold (1) is provided with a second through groove that matches the guide rod (402), and the outer wall of the moving mold (2) is provided with a pressure rod that matches the second through groove.

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