An injection mold with a guide demolding structure

Abstract

This utility model discloses an injection mold with a guiding demolding structure, including a fixed mold and a moving mold. Two guide rods are fixedly installed on both outer walls of the fixed mold via support plates. Connecting plates are fixedly installed on both outer walls of the moving mold. Guide sleeves that mate with the two guide rods on the same side are fixedly installed on the upper surfaces of the two connecting plates through installation openings. Sliding rods are fixedly installed on both outer walls of the fixed mold via buffer frames. Moving plates are slidably installed on the outer walls of the two sliding rods. This utility model, by setting up components such as guide rods, guide sleeves, buffer springs, and buffer plates, and the precise cooperation between the guide rods and guide sleeves, controls the movement error of the moving mold to a very small range, effectively avoiding lateral displacement when the moving mold separates from the fixed mold. This significantly reduces problems such as flash and dimensional deviations in the product. At the same time, the buffer springs and buffer plates absorb impact forces during mold opening and closing, avoiding damage to the mold caused by rigid collisions and extending the mold's service life.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, and in particular to an injection mold with a guide demolding structure. Background Technology

[0002] Injection molds are specialized tools used in plastic injection molding processes. They are used to inject heated and molten plastic into a mold cavity, where it is cooled and solidified to obtain the finished product.

[0003] Injection molds are widely used in the production of plastic parts and products, and are particularly suitable for mass production of products with complex geometries and high precision requirements, such as automotive parts, electronic housings, home appliances, and toys. Traditional injection molds rely on a single guiding structure for demolding, which can easily cause lateral displacement when the moving mold separates from the fixed mold, resulting in flash or dimensional deviations in the product, reducing the production pass rate of injection molded parts and making them impractical. Therefore, it is necessary to redesign an injection mold with a guiding demolding structure to address the above problems. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing an injection mold with a guiding demolding structure.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An injection mold with a guiding demolding structure includes a fixed mold and a moving mold. Two guide rods are fixedly mounted on each of the outer walls of the fixed mold via support plates. Connecting plates are fixedly mounted on each of the outer walls of the moving mold. Guide sleeves that mate with the two guide rods on the same side are fixedly mounted on the upper surfaces of both connecting plates through mounting openings. Sliding rods are fixedly mounted on each of the outer walls of the fixed mold via buffer frames. Moving plates are slidably mounted on the outer walls of both sliding rods. The bottom walls of both moving plates are connected to the inner bottom wall of the buffer frame on the same side via a buffer mechanism. Buffer plates that mate with the connecting plates are fixedly connected to the upper surfaces of both moving plates via a connecting mechanism. The fixed mold... An upper top plate is slidably mounted on the bottom wall of the cavity via a storage groove. A bidirectional screw is rotatably mounted on the outer bottom wall of the fixed mold via a base. A motor connected to the bidirectional screw is fixedly mounted on the outer wall of the base. Two moving blocks are rotatably mounted on the outer wall of the bidirectional screw via a limiting mechanism. A first connecting frame is fixedly mounted on the upper surface of each of the two moving blocks. A second connecting frame is rotatably connected to the two first connecting frames via a connecting mechanism. An upper top opening that mates with the second connecting frame is opened on the upper surface of both the outer bottom wall of the fixed mold and the upper surface of the base. A pressure sensor is fixedly mounted on the upper surface of the second connecting frame. The end of the pressure sensor is fixedly connected to the bottom wall of the upper top plate.

[0007] Preferably, the buffer mechanism includes a buffer spring installed on the outer wall of the slide bar, and the two ends of the buffer spring are elastically connected to the bottom wall of the buffer frame and the bottom wall of the moving plate, respectively.

[0008] Preferably, the connecting mechanism includes two connecting rods fixedly installed on the upper surface of the movable plate, and the ends of the two connecting rods are fixedly connected to the bottom wall of the buffer plate.

[0009] Preferably, the limiting mechanism includes a limiting rod fixedly installed inside the base, the limiting rod sliding through the two moving blocks.

[0010] Preferably, the connecting mechanism includes a connecting plate rotatably mounted inside the first connecting frame, and the end of the connecting plate is rotatably connected to the inside of the second connecting frame.

[0011] Preferably, a controller is fixedly installed on the outer wall of the base, and the controller is electrically connected to the motor and the pressure sensor.

[0012] The beneficial effects of this utility model are:

[0013] 1. By setting up components such as guide rods, guide sleeves, buffer springs and buffer plates, the precise cooperation between the guide rods and guide sleeves controls the movement error of the moving mold to a very small range, effectively avoiding lateral displacement when the moving mold separates from the fixed mold, and significantly reducing problems such as flash and dimensional deviations in the products. At the same time, the buffer springs and buffer plates absorb the impact force during the mold opening and closing process, avoiding damage to the mold caused by rigid collisions and extending the service life of the mold.

[0014] 2. By setting up components such as an upper ejector plate, a bidirectional screw, and a pressure sensor, the pressure sensor monitors the ejection force in real time. Once the preset threshold is exceeded, the controller automatically adjusts the motor speed to achieve dynamic control of the product ejection process. This prevents product deformation and tearing due to excessive ejection force, making it particularly suitable for the production of thin-walled and precision plastic products. The design of the bidirectional screw and connecting plate ensures that the upper ejector plate rises smoothly, ensuring uniform force on the product and further improving product quality and production stability. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of an injection mold with a guiding demolding structure proposed in this utility model;

[0016] Figure 2 for Figure 1 A schematic diagram of the vertical section structure;

[0017] Figure 3 This is a side view of an injection mold with a guide demolding structure proposed in this utility model.

[0018] Figure 4 for Figure 2Enlarged schematic diagram of the structure at point A in the diagram;

[0019] Figure 5 for Figure 3 Enlarged schematic diagram of the structure at point B in the diagram.

[0020] In the diagram: 1 Fixed mold, 2 Moving mold, 3 Support plate, 4 Guide rod, 5 Connecting plate, 6 Guide sleeve, 7 Buffer frame, 8 Slide rod, 9 Moving plate, 10 Buffer spring, 11 Connecting rod, 12 Buffer plate, 13 Top plate, 14 Base, 15 Bidirectional screw, 16 Motor, 17 Limiting rod, 18 Moving block, 19 First connecting frame, 20 Connecting plate, 21 Second connecting frame, 22 Pressure sensor, 23 Controller. 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 of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0022] Reference Figure 1-5 An injection mold with a guiding demolding structure includes a fixed mold 1 and a moving mold 2. Two guide rods 4 are fixedly installed on both outer walls of the fixed mold 1 via support plates 3. Connecting plates 5 are fixedly installed on both outer walls of the moving mold 2. Guide sleeves 6, which mate with the two guide rods 4 on the same side, are fixedly installed on the upper surfaces of the two connecting plates 5 through installation openings. Sliding rods 8 are fixedly installed on both outer walls of the fixed mold 1 via buffer frames 7. Moving plates 9 are slidably installed on the outer walls of the two sliding rods 8. The bottom walls of the two moving plates 9 are connected to the inner bottom wall of the buffer frame 7 on the same side via a buffer mechanism. Buffer plates 12, which mate with the connecting plates 5, are fixedly connected to the upper surfaces of the two moving plates 9 via a connecting mechanism. The bottom wall of the mold cavity of the fixed mold 1 is fitted with a... The upper top plate 13 is slidably installed in the groove. A bidirectional screw 15 is rotatably installed on the outer bottom wall of the fixed mold 1 via the base 14. A motor 16 connected to the bidirectional screw 15 is fixedly installed on the outer wall of the base 14. Two moving blocks 18 are rotatably installed on the outer wall of the bidirectional screw 15 via a limiting mechanism. A first connecting frame 19 is fixedly installed on the upper end face of each of the two moving blocks 18. A second connecting frame 21 is rotatably connected to the inside of each of the two first connecting frames 19 via a connecting mechanism. An upper top opening that mates with the second connecting frame 21 is opened on the outer bottom wall of the fixed mold 1 and the upper end face of the base 14. A pressure sensor 22 is fixedly installed on the upper end face of the second connecting frame 21. The end of the pressure sensor 22 is fixedly connected to the bottom wall of the upper top plate 13.

[0023] Furthermore, the guide rod 4 is made of high-strength alloy steel and its surface is hardened to enhance wear resistance and corrosion resistance. The inner wall of the guide sleeve 6 is provided with a self-lubricating coating, which can reduce friction between the guide rod 4 and the moving mold 2 and the fixed mold 1. During the opening and closing process of the moving mold 2 and the fixed mold 1, the cooperation between the guide rod 4 and the guide sleeve 6 can ensure that the moving mold 2 moves along a precise trajectory, effectively improving the mold closing accuracy and stability.

[0024] The buffer mechanism includes a buffer spring 10 installed on the outer wall of the slide bar 8. The two ends of the buffer spring 10 are elastically connected to the inner bottom wall of the buffer frame 7 and the bottom wall of the movable plate 9, respectively.

[0025] Furthermore, the buffer spring 10 adopts a helical compression spring structure, and its elastic coefficient has been rigorously calculated and tested. It can provide appropriate buffering force under different mold closing speeds. The surface of the buffer spring 10 is treated with anti-rust to extend its service life. During the closing process of the moving mold 2, the buffer spring 10 is compressed, converting the kinetic energy of the moving mold 2 into elastic potential energy, effectively reducing the impact of the moving mold 2 on the fixed mold 1 and protecting the key components of the mold.

[0026] The connecting mechanism includes two connecting rods 11 fixedly installed on the upper surface of the movable plate 9, and the ends of the two connecting rods 11 are fixedly connected to the bottom wall of the buffer plate 12.

[0027] Furthermore, the connecting rod 11 is fixed to the moving plate 9 and the buffer plate 12 by welding to ensure the firmness of the connection. The length of the connecting rod 11 is reasonably designed according to the overall structure of the mold to ensure that the buffer plate 12 contacts the connecting plate 5 in a suitable position. The two connecting rods 11 are symmetrically distributed to make the buffer plate 12 bear the force evenly, maintain stability during the buffering process, and improve the buffering effect.

[0028] The limiting mechanism includes a limiting rod 17 fixedly installed inside the base 14, which slides through two moving blocks 18.

[0029] Furthermore, the limiting rod 17 and the base 14 are fixed with an interference fit to ensure the stability of the limiting rod 17. The diameter of the limiting rod 17 is precisely matched with the limiting hole on the moving block 18, so that the moving block 18 can only slide along the axial direction of the limiting rod 17, effectively limiting the movement trajectory of the moving block 18, preventing the moving block 18 from rotating during the rotation of the bidirectional screw 15, and ensuring the movement accuracy of the moving block 18.

[0030] The connecting mechanism includes a connecting plate 20 rotatably installed inside the first connecting frame 19, and the end of the connecting plate 20 is rotatably connected to the inside of the second connecting frame 21.

[0031] Furthermore, the connecting plate 20 is rotatably connected to the first connecting frame 19 and the second connecting frame 21 by a pin. Both ends of the pin are fixed with snap rings to prevent the pin from falling off. The shape of the connecting plate 20 is specially designed so that while ensuring the connection strength, it can flexibly rotate between the first connecting frame 19 and the second connecting frame 21, so that the second connecting frame 21 can smoothly pass through the top opening under the drive of the moving block 18, and realize the pushing action on the top plate 13.

[0032] A controller 23 is fixedly installed on the outer wall of the base 14. The controller 23 is electrically connected to the motor 16 and the pressure sensor 22.

[0033] Furthermore, the controller 23 adopts a high-performance microprocessor with fast data processing and analysis capabilities. The controller 23 is equipped with multiple interfaces to facilitate data transmission and interaction with external devices. The controller 23 can be programmed to set parameters, enabling it to precisely control the start, stop and speed of the motor 16 based on the data fed back by the pressure sensor 22, thereby achieving an automated demolding process and improving production efficiency and product quality.

[0034] When this utility model is used, the moving mold 2 can move up and down through the lifting components at the injection site. When the moving mold 2 moves downward, the guide sleeves 6 installed on the connecting plates 5 on both sides of the moving mold 2 will accurately fit into the guide rods 4 fixed on the support plates 3 on both sides of the fixed mold 1, ensuring that the moving mold 2 moves down smoothly in the vertical direction and preventing mold misalignment caused by deviation. At the same time, the connecting plates 5 follow the moving mold 2 downward and squeeze the buffer plate 12. The buffer plate 12 drives the moving plate 9 to slide down along the slide bar 8, so that the buffer spring 10 is compressed, converting the impact force generated when the moving mold 2 moves downward into the elastic potential energy of the spring, effectively reducing the collision force when the moving mold 2 and the fixed mold 1 close, avoiding mold damage due to rigid contact, and extending the service life of the mold. When the moving mold 2 and the fixed mold 1 are completely closed, the injection molding machine injects the molten plastic into the mold cavity. Under the action of the cooling system, the plastic gradually solidifies and is formed into the desired product.

[0035] During the mold opening stage, the lifting assembly drives the moving mold 2 to move upward. The guide sleeve 6 slides smoothly along the guide rod 4, ensuring that the moving mold 2 maintains precise guidance during its ascent and preventing deviation in the demolding direction. As the moving mold 2 continues to rise, the compressed buffer spring 10 begins to slowly release its elastic potential energy, pushing the moving plate 9 and the buffer plate 12 to return to their original positions. The buffer plate 12 provides a reverse support force to the connecting plate 5, assisting the moving mold 2 to rise smoothly and further reducing vibration during demolding. At this time, the motor 16 at the bottom of the fixed mold 1 starts under the command of the controller 23, driving the bidirectional screw 15 to start rotating. Under the restriction of the limit rod 17, Two moving blocks 18 move towards each other along the bidirectional screw 15, and drive the second connecting frame 21 to rise smoothly through the connecting plate 20. The second connecting frame 21 pushes the upper ejector plate 13, slowly ejecting the formed product from the cavity of the fixed mold 1. During this process, the pressure sensor 22 monitors the magnitude of the ejection force in real time and feeds the data back to the controller 23. Once the ejection force exceeds the preset threshold, the controller 23 immediately adjusts the speed of the motor 16 to slow down the ejection speed, so as to avoid product deformation, tearing and other quality problems caused by excessive ejection force. This achieves precise control of the demolding process and ensures that the product can be completely and with high quality removed from the mold.

[0036] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An injection mold with a guiding demolding structure, comprising a fixed mold (1) and a moving mold (2), characterized in that, Two guide rods (4) are fixedly installed on both sides of the outer wall of the fixed mold (1) through support plates (3). Two connecting plates (5) are fixedly installed on both sides of the outer wall of the moving mold (2). Guide sleeves (6) that cooperate with the two guide rods (4) on the same side are fixedly installed on the upper surface of the two connecting plates (5) through installation openings. Slide rods (8) are fixedly installed on both sides of the outer wall of the fixed mold (1) through buffer frames (7). Moving plates (9) are slidably installed on the outer walls of the two slide rods (8). The bottom walls of the two moving plates (9) are connected to the inner bottom wall of the buffer frame (7) on the same side through a buffer mechanism. The upper surface of the two moving plates (9) is fixedly connected to a buffer plate (12) that cooperates with the connecting plate (5) through a connecting mechanism. The upper top plate (13) is slidably installed on the inner bottom wall of the mold cavity of the fixed mold (1) through a storage groove. The bottom wall of the fixed mold (1) is rotatably mounted with a bidirectional screw (15) via a base (14). The outer wall of the base (14) is fixedly mounted with a motor (16) connected to the bidirectional screw (15). The outer wall of the bidirectional screw (15) is rotatably mounted with two moving blocks (18) via a limiting mechanism. The upper surfaces of the two moving blocks (18) are fixedly mounted with a first connecting frame (19). The two first connecting frames (19) are rotatably connected with a second connecting frame (21) via a connecting mechanism. The bottom wall of the fixed mold (1) and the upper surface of the base (14) are both provided with an upper opening that cooperates with the second connecting frame (21). The upper surface of the second connecting frame (21) is fixedly mounted with a pressure sensor (22). The end of the pressure sensor (22) is fixedly connected to the bottom wall of the upper top plate (13).

2. The injection mold with a guide demolding structure according to claim 1, characterized in that, The buffer mechanism includes a buffer spring (10) installed on the outer wall of the slide bar (8), and the two ends of the buffer spring (10) are elastically connected to the inner bottom wall of the buffer frame (7) and the bottom wall of the moving plate (9), respectively.

3. The injection mold with a guide demolding structure according to claim 2, characterized in that, The connecting mechanism includes two connecting rods (11) fixedly installed on the upper surface of the movable plate (9), and the ends of the two connecting rods (11) are fixedly connected to the bottom wall of the buffer plate (12).

4. An injection mold with a guide demolding structure according to claim 3, characterized in that, The limiting mechanism includes a limiting rod (17) fixedly installed inside the base (14), and the limiting rod (17) slides through two moving blocks (18).

5. An injection mold with a guide demolding structure according to claim 4, characterized in that, The connecting mechanism includes a connecting plate (20) rotatably installed inside the first connecting frame (19), and the end of the connecting plate (20) is rotatably connected to the inside of the second connecting frame (21).

6. An injection mold with a guide demolding structure according to claim 5, characterized in that, A controller (23) is fixedly installed on the outer wall of the base (14), and the controller (23) is electrically connected to the motor (16) and the pressure sensor (22).

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