Anti-adhesion injection mold

Abstract

The utility model discloses an anti-adhesion injection mold, which belongs to the technical field of injection molds and comprises a base, vertical plates are fixedly arranged on the left side and the right side of the base, a lower mold is fixedly mounted in the middle of the upper surface of the base, an upper mold is arranged above the lower mold, and the upper mold is fixedly mounted below a lifting plate. An injection port is formed in the middle of the top face of the lifting plate, sliding grooves are formed in the inner sides of the left side and the right side of the vertical plate, sliding blocks are fixedly installed on the left side and the right side of the lifting plate, the sliding blocks are slidably connected into the sliding grooves, a transmission rod is horizontally arranged in the base, a cam is arranged on the outer side of the transmission rod, and an ejection block is arranged above the cam; and the cam rotates to form a reciprocating ejection structure for the ejection block. According to the anti-adhesion injection mold, product adhesion is effectively prevented, mold actions are accurately controlled, the drive motor drives the transmission system to achieve mold opening and closing and product ejection, the injection product quality and production efficiency can be improved, and the production cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, specifically to an anti-sticking injection mold. Background Technology

[0002] Injection molds are key tools in plastic molding and processing, widely used in industries such as automotive, electronics, and home appliances. They mainly consist of two parts: a moving mold and a fixed mold. Through processes such as mold closing, injection, pressure holding, cooling, and mold opening, molten plastic is injected into the mold cavity, and after cooling and solidification, it is molded into the desired product. The structural design and manufacturing precision of injection molds directly determine the dimensional accuracy, surface quality, and production efficiency of plastic products. They are characterized by high production efficiency and good product consistency, enabling the mass production of complex-shaped plastic products. They are an indispensable piece of equipment in modern manufacturing. However, existing injection molds still have certain problems in use:

[0003] For example, an injection mold with application number 201721200900.6 includes a moving mold and a fixed mold. The technical solution is as follows: the moving mold is provided with a moving mold base, a moving mold clamping plate, a core, a positioning pin, a guide sleeve, and a connecting block. The connecting block is provided with a push rod. The fixed mold is provided with a fixed mold base, a fixed mold clamping plate, a cavity, a positioning groove, a reset rod, and fixing bolt holes. The moving mold and the fixed mold are connected in a cooperative manner. However, in the field of injection molding production, existing injection molds have insufficient surface finish, unreasonable draft angle design, and uneven cooling and shrinkage of plastic melt. As a result, plastic products are very easy to stick to the mold surface. Forced demolding will cause product deformation and damage, affecting the product qualification rate, increasing production costs, and accelerating mold wear.

[0004] In view of this, in-depth research was conducted on the above issues, which led to the creation of this case.

[0005] To address the aforementioned issues, innovative designs were implemented based on existing injection molds. Utility Model Content

[0006] The purpose of this invention is to provide an anti-adhesion injection mold to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] An anti-adhesion injection mold includes a base, with upright plates fixedly disposed on the left and right sides of the base. A lower mold is fixedly installed in the middle of the upper surface of the base, and an upper mold is disposed above the lower mold. The upper mold is fixedly installed below a lifting plate, and an injection port is opened in the middle of the top surface of the lifting plate. Sliding grooves are opened on the inner sides of the left and right sides of the upright plates, and sliders are fixedly installed on the left and right sides of the lifting plate, with the sliders slidably connected to the inside of the sliding grooves. A transmission rod is horizontally disposed inside the base, and a cam is disposed on the outer side of the transmission rod. An ejector block is disposed above the cam, and the rotation of the cam forms a reciprocating ejection structure with the ejector block.

[0009] Preferably, a drive motor is fixedly installed on the right side of the base, and a transmission rod is connected to the output end of the drive motor on the left side, with the left end of the transmission rod rotatably connected to the left side of the base.

[0010] With the above technical solution, the drive motor on the right side of the base and the connected transmission rod provide stable power to the transmission rod, ensuring that the transmission rod rotates continuously. This provides the power basis for driving the cam, worm gear and other components to work, and ensures the smooth operation of each action of the mold.

[0011] Preferably, worm gears are provided on the outer sides of both the left and right sides of the transmission rod, and worm wheels are connected and installed on the rear side of each worm gear, with the bottom of each worm wheel rotatably connected to the bottom surface inside the base.

[0012] By adopting the above technical solution, the worm gear on the outer side of the left and right sides of the transmission rod and the worm wheel connected to the rear side, the worm gear and worm wheel together form a worm gear transmission structure, which can effectively change the direction of power transmission, convert the rotation of the transmission rod into the vertical rotation of the worm wheel, and has a self-locking function, which can keep the lifting plate stable after it rises or falls to the designated position, and prevent it from moving accidentally due to external force or its own weight.

[0013] Preferably, a threaded rod is connected above the worm gear, and both sides of the lifting plate are threaded to the outside of the threaded rod.

[0014] By adopting the above technical solution, the threaded rod connected above the worm gear and the threaded connection with the lifting plate allow the lifting plate to move smoothly up and down when the worm gear drives the threaded rod to rotate. This precisely controls the opening and closing distance between the upper and lower molds, meets the precise requirements of the injection molding process for mold opening and closing, and helps to improve the molding quality of injection molded products.

[0015] Preferably, cams are fixedly installed on the inner sides of the left and right sides of the transmission rod, and sliding rails are fixedly provided on the left and right sides of the top surface inside the base, and a moving block is slidably connected inside the sliding rail.

[0016] The above technical solution uses cams fixed on the inner sides of the left and right sides of the transmission rod and sliding rails and moving blocks on the top surface of the base. When the cams rotate, they push the moving blocks to move within the sliding rails. This structural design is simple and reliable, and can convert the rotational motion of the cams into the linear motion of the moving blocks, providing a stable driving method for the ejection action of the ejector blocks.

[0017] Preferably, a top column is fixedly installed above the movable block, and the top column penetrates the top surface of the base and the bottom surface of the lower mold. An ejector block is fixedly connected to the top surface of the top column, and a spring is connected above the movable block, with the upper end of the spring connected to the inner top surface of the base.

[0018] The above technical solution uses a fixed top post and a connected ejector block above the moving block. The top post accurately transmits the movement of the moving block to the ejector block, while the spring acts as a buffer, enabling the ejector block to stably eject the plastic product, ensuring the smooth demolding process and preventing damage to the plastic product due to unstable ejection.

[0019] Preferably, the bottom of the lower mold has a conical groove, and the ejector block has a conical structure, and the ejector block is slidably connected inside the conical groove.

[0020] By adopting the above technical solution, the conical groove at the bottom of the lower mold and the conical ejector block have a conical design that allows the ejector block to make better contact with the plastic product when ejecting it, evenly distributing the ejection force and preventing the plastic product from deforming due to excessive local force. At the same time, the conical structure also helps the plastic product to detach from the mold more easily during demolding, reducing the possibility of sticking.

[0021] Compared with the prior art, the beneficial effects of this utility model are: this anti-sticking injection mold,

[0022] 1. Effectively prevents product sticking: The tapered groove at the bottom of the lower mold cooperates with the tapered ejector block. When the cam rotates, it pushes the moving block to move in the sliding track, causing the ejector block to move up and down repeatedly, evenly distributing the ejection force. Combined with a reasonable mold opening and closing structure, it can effectively prevent plastic products from sticking to the mold surface during demolding, improve the product qualification rate, and reduce production costs.

[0023] 2. Precise control of mold movements: Through the transmission system composed of components such as drive motor, worm gear, worm wheel, and threaded rod, the opening and closing distance of the upper and lower molds, as well as the ejection action of the ejector block, can be precisely controlled to meet the high precision requirements of the injection molding process and improve the quality and production efficiency of injection molded products. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the appearance and structure of this utility model;

[0025] Figure 2 This is a front sectional view of the present invention.

[0026] Figure 3 This utility model Figure 2 Enlarged structural diagram at point A in the middle;

[0027] Figure 4 This is a schematic diagram of the lower mold structure of this utility model;

[0028] Figure 5 This is a schematic diagram of the ejector block driving structure of this utility model.

[0029] In the diagram: 1. Base; 2. Vertical plate; 3. Slide groove; 4. Lower mold; 5. Upper mold; 6. Lifting plate; 7. Slider; 8. Injection port; 9. Drive motor; 10. Transmission rod; 11. Worm gear; 12. Worm wheel; 13. Threaded rod; 14. Cam; 15. Sliding rail; 16. Moving block; 17. Ejector column; 18. Ejector block; 19. Spring; 20. Conical groove. Detailed Implementation

[0030] 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.

[0031] Please see Figures 1-5 This utility model provides a technical solution:

[0032] An anti-adhesion injection mold includes a base 1, with upright plates 2 fixedly arranged on the left and right sides of the base 1. A lower mold 4 is fixedly installed in the middle of the upper surface of the base 1, and an upper mold 5 is arranged above the lower mold 4. The upper mold 5 is fixedly installed below a lifting plate 6, and an injection port 8 is opened in the middle of the top surface of the lifting plate 6. Slide grooves 3 are opened on the inner sides of the left and right sides of the upright plates 2, and sliders 7 are fixedly installed on the left and right sides of the lifting plate 6, and the sliders 7 are slidably connected to the inside of the slide grooves 3. A transmission rod 10 is horizontally arranged inside the base 1, and a cam 14 is arranged on the outer side of the transmission rod 10. An ejector block 18 is arranged above the cam 14. The rotation of the cam 14 forms a reciprocating ejection structure with the ejector block 18.

[0033] A drive motor 9 is fixedly installed on the right side of the base 1, and a transmission rod 10 is connected to the output end of the drive motor 9 on the left side. The left end of the transmission rod 10 is rotatably connected to the left side of the inside of the base 1. The drive motor 9 on the right side of the base 1 and the connected transmission rod 10 provide stable power to the transmission rod 10, ensuring that the transmission rod 10 rotates continuously. This provides the power basis for driving the cam 14, worm gear 11 and other components to work, ensuring the smooth operation of each action of the mold.

[0034] Worms 11 are provided on both the left and right outer sides of the transmission rod 10, and worm wheels 12 are connected and installed on the rear side of each worm 11. The bottom of each worm wheel 12 is rotatably connected to the inner bottom surface of the base 1. A threaded rod 13 is connected above the worm wheel 12, and the left and right sides of the lifting plate 6 are threadedly connected to the outer side of the threaded rod 13. The transmission structure composed of the worms 11 on the left and right outer sides of the transmission rod 10 and the worm wheels 12 connected to the rear side can effectively change the direction of power transmission, converting the rotation of the transmission rod 10 into... The vertical rotation of the worm gear 12, with its self-locking function, allows the lifting plate 6 to remain stable after rising or falling to a designated position, preventing accidental movement due to external forces or its own weight. The threaded rod 13 connected above the worm gear 12 is threadedly connected to the lifting plate 6. When the worm gear 12 drives the threaded rod 13 to rotate, the lifting plate 6 can move smoothly up and down, precisely controlling the opening and closing distance between the upper mold 5 and the lower mold 4, meeting the precise requirements of the injection molding process for mold opening and closing, and helping to improve the molding quality of injection molded products.

[0035] Cams 14 are fixedly installed on the inner sides of the left and right sides of the transmission rod 10. Sliding rails 15 are fixedly installed on the left and right sides of the top surface inside the base 1. Moving blocks 16 are slidably connected inside the sliding rails 15. A top post 17 is fixedly installed above the moving block 16, penetrating the top surface of the base 1 and the bottom surface of the lower mold 4. An ejector block 18 is fixedly connected to the top surface of the top post 17. A spring 19 is connected above the moving block 16, with its upper end connected to the top surface inside the base 1. A conical groove 20 is formed at the bottom of the lower mold 4, and the ejector block 18 has a conical structure and is slidably connected inside the conical groove 20. The cams 14 fixed on the inner sides of the left and right sides of the transmission rod 10, along with the sliding rails 15 and moving blocks 16 on the top surface inside the base 1, cause the moving blocks 16 to move within the sliding rails 15 when the cams 14 rotate. This structural design is simple. The single and reliable mechanism can convert the rotational motion of the cam 14 into the linear motion of the moving block 16, providing a stable drive for the ejection action of the ejector block 18. The ejector pin 17 fixed above the moving block 16 and the connected ejector block 18 allow the ejector pin 17 to accurately transmit the motion of the moving block 16 to the ejector block 18. The spring 19 acts as a buffer, enabling the ejector block 18 to stably eject the plastic product, ensuring a smooth demolding process and preventing damage to the plastic product due to unstable ejection. The conical groove 20 at the bottom of the lower mold 4 and the conical ejector block 18 allow the ejector block 18 to better contact the plastic product when ejecting it, evenly distributing the ejection force and preventing the plastic product from deforming due to excessive local force. At the same time, the conical structure also helps the plastic product to detach from the mold more easily during demolding, reducing the possibility of sticking.

[0036] Working principle:

[0037] In use, the mold closing process is as follows: the worm gears 11 on the outer sides of the transmission rod 10 rotate synchronously with the transmission rod 10, driving the worm wheel 12 connected to the rear to rotate. The threaded rod 13 connected above the worm wheel 12 rotates accordingly. Since the lifting plate 6 is threadedly connected to the outer side of the threaded rod 13 on both sides, and the sliders 7 on both sides of the lifting plate 6 slide in the grooves 3 on the inner side of the vertical plate 2, the lifting plate 6 descends smoothly, thereby driving the upper mold 5 to move downwards and close with the lower mold 4. During mold closing, the ejector block 18 is designed to be flush with the conical groove 20. Injection process: after mold closing, molten plastic is injected into the mold cavity composed of the upper mold 5 and the lower mold 4 through the injection port 8 in the middle of the top surface of the lifting plate 6. During injection, the stable mold closing structure ensures that the mold will not shift or loosen, guaranteeing the molding quality of the plastic product. Mold opening and ejection process: after injection and cooling, the drive motor 9 reverses, driving the transmission rod 10 to rotate in the opposite direction. The aforementioned transmission structure causes the lifting plate 6 to rise, thus opening the mold. Simultaneously, the cams 14 fixed to the inner sides of the transmission rod 10 rotate synchronously. When the cams 14 rotate, they push the moving block 16 to move within the sliding track 15 on the top surface inside the base 1. The ejector pin 17 fixedly installed above the moving block 16 moves accordingly. The ejector pin 17 penetrates the top surface of the base 1 and the bottom surface of the lower mold 4, driving the ejector block 18 connected to the top to move upward. The spring 19 connected above the moving block 16 is stretched when the ejector block 18 rises, causing the ejector block 18 to move elastically back and forth, avoiding impact on the plastic product during ejection. This allows the plastic product to smoothly leave the mold, effectively preventing deformation or adhesion to the mold due to excessive local force, thus completing the demolding process.

[0038] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0039] 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. An anti-adhesion injection mold, comprising a base (1), wherein upright plates (2) are fixedly disposed on the left and right sides of the base (1), a lower mold (4) is fixedly installed in the middle of the upper surface of the base (1), and an upper mold (5) is disposed above the lower mold (4), characterized in that: The upper mold (5) is fixedly installed below the lifting plate (6), and the top surface of the lifting plate (6) is provided with an injection port (8). The inner sides of the left and right sides of the vertical plate (2) are provided with sliding grooves (3), and the left and right sides of the lifting plate (6) are fixedly installed with sliders (7), and the sliders (7) are slidably connected to the inside of the sliding grooves (3). The base (1) is horizontally provided with a transmission rod (10), and a cam (14) is provided on the outside of the transmission rod (10). An ejector block (18) is provided above the cam (14). The rotation of the cam (14) forms a reciprocating ejection structure with the ejector block (18).

2. The anti-adhesion injection mold according to claim 1, characterized in that: A drive motor (9) is fixedly installed on the right side of the base (1), and a transmission rod (10) is connected to the output end of the drive motor (9) on the left side. The left end of the transmission rod (10) is rotatably connected to the left side of the inside of the base (1).

3. The anti-adhesion injection mold according to claim 2, characterized in that: The transmission rod (10) is provided with worm gears (11) on both the left and right sides, and worm wheels (12) are connected and installed on the rear side of each worm gear (11), and the bottom of each worm wheel (12) is rotatably connected to the bottom surface inside the base (1).

4. The anti-adhesion injection mold according to claim 3, characterized in that: A threaded rod (13) is connected above the worm gear (12), and the left and right sides of the lifting plate (6) are threaded to the outside of the threaded rod (13).

5. The anti-adhesion injection mold according to claim 2, characterized in that: Cams (14) are fixedly installed on the inner sides of the left and right sides of the transmission rod (10), and sliding rails (15) are fixedly installed on the left and right sides of the top surface inside the base (1), and a moving block (16) is slidably connected inside the sliding rail (15).

6. The anti-adhesion injection mold according to claim 5, characterized in that: A top post (17) is fixedly installed above the movable block (16), and the top post (17) penetrates the top surface of the base (1) and the bottom surface of the lower mold (4). An ejector block (18) is fixedly connected to the top surface of the top post (17). A spring (19) is connected above the movable block (16), and the upper end of the spring (19) is connected to the top surface inside the base (1).

7. The anti-adhesion injection mold according to claim 6, characterized in that: The lower mold (4) has a tapered groove (20) at the bottom, and the ejector block (18) has a tapered structure and is slidably connected to the inside of the tapered groove (20).

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