Injection mold capable of preventing product surface from being scratched

Abstract

The invention relates to the technical field of injection molds, and discloses an injection mold capable of preventing the surface of a product from being scratched, the injection mold comprises a mold top plate, a movable mold plate is arranged at the lower part of the mold top plate, a cooling mechanism is arranged outside the movable mold plate, a fixed block is arranged at the lower part of the movable mold plate, and an injection molding mechanism is arranged outside the fixed block; a first fixed mold plate is arranged on the left side of the lower portion of the fixed block, a second fixed mold plate is arranged on the right side of the lower portion of the fixed block, and the lower portion of the first fixed mold plate and the lower portion of the second fixed mold plate are fixedly connected with a mold bottom plate. When the die is static, the spring extends to lift the core roller, so that the product is prevented from being contacted and protected; in the core injection stage, the spring is pressed to enable the core roller to descend to be flush with the product to complete machining; after cooling, the spring is released to lift the core roller to prevent scratching; when the mold is opened to eject a product, the core roller is kept at a high position, contact scratch is avoided, spring adjustment ensures that each stage adapts to requirements, the finished product quality is improved, and mold abrasion is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of injection molds, in particular to an injection mold for preventing the surface of a product from being scratched. Background Art

[0002] Injection molding is an important method for the production of industrial products with a wide range of applications. Products usually use two processes: rubber injection molding and plastic injection molding. The specific selection is based on the characteristics of the material and the functional requirements of the product. In addition, the injection molding process can be further divided into injection molding and die casting. These methods are adapted through different process flows and equipment to meet the production needs of various complex products. The injection molding machine (abbreviated as injection machine or injection molding machine) is the core equipment. It heats thermoplastic or thermosetting plastic materials to a molten state, injects them into the mold under high pressure, and cools and molds them into plastic products of various shapes.

[0003] However, with the rapid development of the plastic products industry and the increasing market demand for high-end products, especially in the production of certain products with extremely high surface quality requirements, the design and manufacturing of traditional injection molds have some limitations. For example, during the injection molding process, factors such as friction inside the mold, improper design of the ejection mechanism, and uneven material flow may cause scratches, indentations or defects on the product surface. These problems not only affect the appearance of the product, but may also reduce its functionality and service life. In severe cases, they may even lead to product scrapping and increase production costs. Summary of the invention

[0004] In view of the shortcomings of the prior art, the present invention provides an injection mold that prevents scratches on the product surface, thereby solving the problem that during the injection molding process, factors such as friction inside the mold, improper design of the ejection mechanism, and uneven material flow may cause scratches, indentations or defects on the product surface. These problems not only affect the appearance of the product, but may also reduce its functionality and service life.

[0005] To achieve the above purpose, the present invention is implemented through the following technical solutions: an injection mold for preventing scratches on the surface of a product, comprising a mold top plate, a movable mold plate is arranged at the lower part of the mold top plate, a cooling mechanism is arranged outside the movable mold plate, a fixed block is arranged at the lower part of the movable mold plate, an injection mechanism is arranged outside the fixed block, a fixed mold plate 1 is arranged on the left side of the lower part of the fixed block, a fixed mold plate 2 is arranged on the right side of the lower part of the fixed block, the lower parts of the fixed mold plate 1 and the fixed mold plate 2 are fixedly connected with a mold bottom plate, a top mold mechanism is arranged inside the fixed block, a mounting block 1 is fixedly connected with the middle parts of the fixed mold plate 1 and the fixed mold plate 2, a mounting block 2 is arranged at the lower part of the mounting block, and a buffer mechanism is arranged at the upper part of the mounting block 1; The top mold mechanism comprises a fixing frame, which is fixedly connected to both sides of the interior of the fixing block, a first spring is arranged at the lower part of the fixing frame, and core rollers are installed on both sides of the interior of the two fixing frames.

[0006] Preferably, the cooling mechanism includes a cooling joint, which is fixedly connected to the outside of the movable template, a cooling shell is installed inside the movable template, the cooling joint is connected to the cooling shell, and plug blocks are fixedly connected around the inside of the movable template.

[0007] Preferably, the injection molding mechanism comprises an injection molding joint, the injection molding joint is fixedly connected to the outside of the fixed block, an injection molding shell is arranged inside the injection molding joint, and the injection molding joint is connected to the injection molding joint.

[0008] Preferably, the buffer mechanism comprises a fixing rod, the fixing rod is fixedly connected around the upper part of the mounting block, a second spring is sleeved on the outside of a plurality of the fixing rods, and a plurality of tops of the fixing rods are arranged inside the fixing block.

[0009] Preferably, an injection port is provided on the upper portion of the mold top plate.

[0010] Preferably, fixing columns are fixedly connected to the lower part of the movable template on all sides, and sockets are opened on all sides inside the fixing block, and a plurality of the fixing columns are plugged into a plurality of the sockets.

[0011] Preferably, the lower part of the fixing block is provided with slots around it, and a plurality of the fixing rods are plugged into the plurality of the slots.

[0012] Preferably, a mounting rod is fixedly connected to the right side of the exterior of the fixing block, a mounting plate is rotatably connected to the exterior of the mounting rod, and a positioning pin is inserted into the top of the mounting plate.

[0013] Preferably, both sides of the fixed template 1 and the fixed template 2 are provided with sliding grooves, and the plurality of insert blocks are slidably connected inside the plurality of sliding grooves.

[0014] Preferably, the shape of the plurality of slide grooves is oblique.

[0015] Working principle: When the mold is in a stationary state, the first spring stretches naturally and pushes the movable core roller to a height slightly higher than the surface of the product, avoiding unnecessary contact with the product and protecting the surface of the product. In the core injection stage of the mold, as the mold closes and fills the material, the first spring is gradually compressed, and the height of the core roller drops to be flush with the surface of the product and is pushed to the specified position to complete the core injection process. After the product is cooled and shaped, the mold enters the core discharge stage. The first spring releases the stored energy and pushes the movable core roller back to the initial high position to ensure that the surface of the product is protected from scratches during the core discharge process. After the mold is opened, the ejection mechanism ejects the product smoothly, while the core roller always remains in a high position to avoid any direct contact and further reduce the risk of scratches. During the entire working cycle, the spring device adjusts the height to ensure that the movable core roller can flexibly adapt to the needs at different stages and avoid unnecessary friction or collision. This design significantly improves the quality and pass rate of the finished product, while reducing the wear of mold components.

[0016] The present invention provides an injection mold for preventing product surface from being scratched. The invention has the following beneficial effects: The present invention has the following steps: when the mold is stationary, the spring stretches to raise the core roller to avoid contact and protect the product; during the core injection stage, the spring is compressed to lower the core roller to be flush with the product to complete the processing; after cooling, the spring is released to raise the core roller to prevent scratches; when the mold is opened to eject the product, the core roller is kept in a high position to avoid contact and scratches. The spring adjustment ensures that each stage meets the needs, improves the quality of the finished product and reduces mold wear. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A three-dimensional diagram of an injection mold for preventing scratches on the surface of a product according to the present invention; Figure 2 This is a schematic diagram of the structure of a rotating block of an injection mold for preventing scratches on the surface of a product according to the present invention; Figure 3 This is a schematic diagram of a cooling joint structure of an injection mold for preventing scratches on the surface of a product according to the present invention; Figure 4 This is a schematic structural diagram of an injection head of an injection mold for preventing scratches on the surface of a product according to the present invention; Figure 5 This is a schematic diagram of a mounting hole structure of an injection mold for preventing scratches on the surface of a product according to the present invention; Figure 6 This is a schematic diagram of a second spring structure of an injection mold for preventing scratches on the surface of a product according to the present invention; Figure 7 The present invention is a schematic diagram of a bottom plate structure of an injection mold for preventing scratches on the surface of a product.

[0018] Figure 8 for Figure 7 A magnified view of the structure in the middle.

[0019] Among them, 1. mold top plate; 2. moving mold plate; 3. fixed block; 4. fixed mold plate 1; 5. fixed mold plate 2; 6. mounting block 1; 7. mounting block 2; 8. mold bottom plate; 9. injection port; 10. mounting rod; 11. mounting plate; 12. positioning pin; 13. cooling mechanism; 1301. cooling joint; 1302. cooling shell; 14. fixing column; 15. slot; 16. injection mechanism; 1601. injection joint; 1602. injection shell; 17. top mold mechanism; 1701. fixing frame; 1702. first spring; 1703. core roller; 18. socket; 19. plug block; 20. buffer mechanism; 2001. fixing rod; 2002. second spring; 21. slide groove. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] Embodiment 1: Please refer to the attached Figure 1 -Attached Figure 7The embodiment of the present invention provides an injection mold for preventing scratches on the surface of a product, including a mold top plate 1, a movable mold plate 2 is arranged at the lower part of the mold top plate 1, and a cooling mechanism 13 is arranged outside the movable mold plate 2 for adjusting the working temperature of the mold, thereby ensuring the stability of the injection molding process and the quality of the product, a fixed block 3 is arranged at the lower part of the movable mold plate 2, and an injection mechanism 16 is arranged outside the fixed block 3, which can accurately inject molten plastic into the mold cavity to complete the molding process of the product, a fixed mold plate 1 4 is arranged on the left side of the lower part of the fixed block 3, and a fixed mold plate 2 5 is arranged on the right side of the lower part of the fixed block 3 A fixed mold plate 1 4 is arranged on the left side of the lower part of the fixed block 3, and a fixed mold plate 2 5 is arranged on the right side. The two mold plates cooperate to form a complete injection molding cavity to meet the manufacturing requirements of different products. The fixed mold plate 1 4 and the fixed mold plate 2 5 are fixedly connected to the mold bottom plate 8 at the lower part, thereby providing stable support for the mold as a whole. A top mold mechanism 17 is arranged inside the fixed block 3, which is used to eject the product after the molding is completed, ensuring that the product is smoothly demolded while reducing surface damage. A mounting block 1 6 is fixedly connected to the middle part of the fixed mold plate 1 4 and the fixed mold plate 2 5, and a mounting block 2 7 is arranged at the lower part of the mounting block 6. A buffer mechanism 20 is arranged on the upper part of the mounting block 6. The buffer mechanism 20 effectively alleviates the impact force on the product surface during the injection and demoulding process through a spring and a shock-absorbing structure, thereby further reducing the risk of product scratches. An injection port 9 is provided on the upper part of the mold top plate 1 for injecting molten plastic into the mold cavity to ensure that the plastic is evenly distributed to obtain high-quality products. Fixed columns 14 are fixedly connected to the lower part of the movable template 2 around the periphery. These fixed columns 14 play a guiding role when the mold is opened and closed to ensure the precise alignment of the movable template 2 and the fixed template. Sockets are provided around the inner periphery of the fixed block 3. 18, multiple fixed columns 14 are plugged into multiple sockets 18, a mounting rod 10 is fixedly connected to the right side of the fixed block 3, a mounting plate 11 is rotatably connected to the outside of the mounting rod 10, a positioning pin 12 is plugged into the top of the mounting plate 11, both sides of the fixed mold plate 1 4 and the fixed mold plate 2 5 are provided with slide grooves 21, multiple insert blocks 19 are slidably connected inside the multiple slide grooves 21, and the shape of the multiple slide grooves 21 is oblique, and the shape of the slide grooves 21 is oblique. This design enables the insert block 19 to slide smoothly when opening and closing the mold, further reducing the risk of surface scratches caused by impact or friction; The top mold mechanism 17 includes a fixed frame 1701, which is fixedly connected to both sides of the inside of the fixed block 3, and is used to support the overall structure of the top mold mechanism 17 and provide a mounting base for other components. A first spring 1702 is arranged at the lower part of the fixed frame 1701. The design of the first spring 1702 can provide elastic adjustment function to achieve the up and down displacement of the core roller 1703 at different stages of mold operation. The natural extension state of the spring keeps the core roller 1703 at a height slightly higher than the surface of the product, effectively avoiding unnecessary contact between the core roller 1703 and the surface of the product when the mold is stationary, thereby preventing scratches. The core roller 1703 is installed on both sides of the inside of the two fixed frames 1701. The core roller 1703 is a key component of the injection mold, and its main function is to assist in completing the steps of core injection, core removal and demoulding of the product in the mold working cycle.

[0022] Specifically, when the mold is in a stationary state, the first spring 1702 stretches naturally, pushing the movable core roller 1703 to a height slightly higher than the surface of the product. At this time, the core roller 1703 is in a high position, maintaining a certain gap with the surface of the product to avoid unnecessary contact, thereby effectively protecting the surface of the product from scratches or indentations. In the core injection stage of the mold, as the mold closes and fills with molten material, the first spring 1702 is gradually compressed, and the movable core roller 1703 drops in height and slides smoothly to a position flush with the surface of the product. At this stage, the core roller 1703 It is pushed to the designated position through precise positioning, cooperates with the mold cavity, completes the core injection process, ensures that the molten plastic is evenly filled and forms a high-quality product structure. After the product is cooled and shaped, the mold enters the core-out stage. At this time, the first spring 1702 releases its stored energy and pushes the movable core roller 1703 back to its initial high position. The rising action of the movable core roller 1703 ensures that during the core-out process, there is no direct friction between the core roller 1703 and the product surface, thereby avoiding surface scratches caused by collision or scratching during the demoulding process. In this design In the design, the spring device provides continuous buffering and dynamic height adjustment functions, so that the core roller 1703 can flexibly adapt to the changes in demand at each working stage of the mold, which not only ensures product quality, but also improves the reliability of mold operation. When the mold is opened, the ejector mechanism 17 starts to push the ejector pin or push plate to eject the molded product smoothly. At the same time, the movable core roller 1703 remains in a high position, further avoiding contact with the product, ensuring that the surface of the product is intact during the ejection process. This structural design greatly reduces the risk of scratches on the product surface by reducing the contact opportunity between the product and the core roller 1703 and the height adjustment characteristics of the spring. In the entire working cycle, the cooperation of the first spring 1702 and the movable core roller 1703 ensures the dynamic height adjustment and smooth movement of the core roller 1703, avoiding any unnecessary friction or collision caused by the various components of the mold on the product surface at different stages. At the same time, this design effectively improves production efficiency and the qualified rate of finished products by optimizing the product demoulding process. Not only that, the service life of the mold is extended by reducing the wear between the core roller 1703 and other components in the mold.

[0023] Please refer to the attached Figure 1 -Attached Figure 3 The cooling mechanism 13 includes a cooling joint 1301, which serves as an interface for the coolant to enter and exit the mold. The cooling joint 1301 is fixedly connected to the outside of the movable template 2. A cooling shell 1302 is installed inside the movable template 2. The cooling shell 1302 ensures that the coolant can be evenly distributed inside the movable template 2, so that the overall temperature of the mold is uniform, avoiding local overheating or insufficient cooling. The cooling joint 1301 is connected to the cooling shell 1302, and plug blocks 19 are fixedly connected around the inside of the movable template 2.

[0024] Specifically, the coolant is introduced from the cooling device into the cooling joint 1301 through the pipeline and enters the interior of the mold. The coolant flows in the movable mold plate 2 of the mold through the channel inside the cooling shell 1302. The cooling shell 1302 in the movable mold plate 2 is in close contact with the mold surface. Its high thermal conductivity material can quickly transfer the heat in the mold to the coolant. The coolant that absorbs the heat of the mold flows out through the cooling shell 1302 and is discharged back to the cooling device through the cooling joint 1301 for cooling, thereby realizing the recycling of the coolant.

[0025] Embodiment 2: Please see attached Figure 4 -Attached Figure 5 The injection molding mechanism 16 includes an injection molding joint 1601, which serves as a connection interface between the injection molding machine nozzle and the mold, ensuring that the molten plastic can stably flow into the mold cavity during the injection molding process to avoid leakage or uneven flow. The injection molding joint 1601 is fixedly connected to the outside of the fixed block 3. An injection molding shell 1602 is arranged inside the injection molding joint 1601. The injection molding shell 1602 can reduce the resistance and pressure loss during the flow of the plastic, ensuring that the molten plastic can fill the mold cavity with a uniform flow rate and pressure distribution, thereby improving the surface quality of the molded part. The injection molding joint 1601 is connected to the injection molding joint 1601.

[0026] Specifically, during the injection molding process, the molten plastic is heated by the injection molding machine and maintained at an appropriate flow temperature. The molten plastic enters the injection molding joint 1601 through the injection molding machine nozzle and flows into the mold cavity along the injection molding shell 1602 to complete the filling. The injection molding mechanism 16 continues to apply pressure to ensure that the plastic completely fills the mold cavity and compensates for the volume shrinkage during the cooling process to avoid shrinkage or defects in the molded parts. After the injection molding is completed, the injection molding mechanism 16 closes the flow channel and the molten plastic stops flowing in.

[0027] Please see attached Figure 5 -Attached Figure 8 The buffer mechanism 20 includes a fixed rod 2001, which is fixedly connected to the upper part of the mounting block 6. The fixed rod 2001 is fixedly connected to the upper part of the mounting block 6 to provide a support frame for the buffer mechanism 20. The second spring 2002 is sleeved on the outside of the multiple fixed rods 2001, which can withstand and release appropriate pressure during the opening and closing of the mold and the injection molding process, reduce the direct impact force between the various components of the mold, and extend the service life of the mold. The tops of the multiple fixed rods 2001 are arranged inside the fixed block 3, and the lower part of the fixed block 3 is provided with card slots 15. The multiple fixed rods 2001 are plugged into the multiple card slots 15.

[0028] Specifically, when the mold is in a stationary state, the second spring 2002 is in a naturally extended state, the top of the fixing rod 2001 is fixed inside the fixing block 3, and multiple fixing rods 2001 are tightly plugged with the fixing block 3 through the slot 15 to keep the mold stable. When the mold starts to close, the fixing rod 2001 moves downward with the action of the mounting block 6, and the second spring 2002 is gradually compressed. At the same time, the second spring 2002 plays a buffering role, absorbing the impact force when the mold is closed, preventing direct collision between mold components, and protecting the precise structure and surface quality of the mold. During the injection and cooling stages, the buffer mechanism 20 remains stable, and the second spring 2002 continues to provide support to the mold through its pre-compression state to ensure that the height and position of the mold remain consistent.

[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An injection mold for preventing scratches on a product surface, comprising a mold top plate (1), characterized in that: A movable die plate (2) is arranged at the lower part of the mold top plate (1), a cooling mechanism (13) is arranged outside the movable die plate (2), a fixed block (3) is arranged at the lower part of the movable die plate (2), an injection mechanism (16) is arranged outside the fixed block (3), a fixed die plate 1 (4) is arranged at the left side of the lower part of the fixed block (3), a fixed die plate 2 (5) is arranged at the right side of the lower part of the fixed block (3), a mold bottom plate (8) is fixedly connected to the lower parts of the fixed die plate 1 (4) and the fixed die plate 2 (5), a top die mechanism (17) is arranged inside the fixed block (3), a mounting block 1 (6) is fixedly connected to the middle parts of the fixed die plate 1 (4) and the fixed die plate 2 (5), a mounting block 2 (7) is arranged at the lower part of the mounting block 1 (6), and a buffer mechanism (20) is arranged at the upper part of the mounting block 1 (6); The top mold mechanism (17) comprises a fixed frame (1701), the fixed frame (1701) being fixedly connected to both sides of the interior of the fixed block (3), a first spring (1702) being arranged at the lower part of the fixed frame (1701), and core rollers (1703) being installed on both sides of the interior of the two fixed frames (1701).

2. The injection mold for preventing product surface scratches according to claim 1, characterized in that: The cooling mechanism (13) comprises a cooling joint (1301), wherein the cooling joint (1301) is fixedly connected to the outside of the movable template (2), a cooling shell (1302) is installed inside the movable template (2), the cooling joint (1301) is connected to the cooling shell (1302), and plug blocks (19) are fixedly connected to the inside of the movable template (2) on all four sides.

3. The injection mold for preventing product surface from being scratched according to claim 1, characterized in that: The injection molding mechanism (16) comprises an injection molding joint (1601), the injection molding joint (1601) being fixedly connected to the outside of the fixed block (3), an injection molding shell (1602) being arranged inside the injection molding joint (1601), and the injection molding joint (1601) being connected to the injection molding joint (1601).

4. The injection mold for preventing product surface from being scratched according to claim 1, characterized in that: The buffer mechanism (20) comprises a fixing rod (2001), the fixing rod (2001) being fixedly connected to the upper periphery of the mounting block (6), a second spring (2002) being sleeved on the outside of a plurality of the fixing rods (2001), and the tops of the plurality of the fixing rods (2001) being arranged inside the fixing block (3).

5. The injection mold for preventing product surface from being scratched according to claim 1, characterized in that: An injection port (9) is provided on the upper portion of the mold top plate (1).

6. The injection mold for preventing product surface from being scratched according to claim 1, characterized in that: The lower part of the movable template (2) is fixedly connected with fixed columns (14) on all sides, and the fixed block (3) is provided with insertion holes (18) on all sides. A plurality of the fixed columns (14) are plugged into a plurality of the insertion holes (18).

7. The injection mold for preventing product surface from being scratched according to claim 4, characterized in that: The lower part of the fixing block (3) is provided with slots (15) on all sides thereof, and a plurality of the fixing rods (2001) are plugged into the plurality of the slots (15).

8. The injection mold for preventing product surface from being scratched according to claim 1, characterized in that: The right side of the exterior of the fixing block (3) is fixedly connected to a mounting rod (10), the exterior of the mounting rod (10) is rotatably connected to a mounting plate (11), and a positioning pin (12) is inserted into the top of the mounting plate (11).

9. The injection mold for preventing product surface from being scratched according to claim 2, characterized in that: Slide grooves (21) are provided on both sides of the interior of the fixed mold plate 1 (4) and the fixed mold plate 2 (5), and the plurality of insert blocks (19) are slidably connected inside the plurality of slide grooves (21).

10. The injection mold for preventing product surface from being scratched according to claim 9, characterized in that: The shape of the plurality of slide grooves (21) is oblique.

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