Molding equipment for preventing deformation of injection molding product

Abstract

The invention discloses molding equipment for preventing deformation of injection molding products, and relates to the technical field of automobile processing equipment, the molding equipment comprises a movable mold, a fixed mold and a cooling mechanism, an injection molding cavity is formed between the movable mold and the fixed mold after the movable mold and the fixed mold are closed, and the cooling mechanism is arranged in the movable mold and the fixed mold; the cooling mechanism comprises a plurality of first cooling inserts close to the thick area of the injection molding cavity and a plurality of second cooling inserts close to the thin area of the injection molding cavity, the first cooling inserts and the second cooling inserts are distributed in the movable mold and the fixed mold, a main runner is formed in the fixed mold, a plurality of branch runners are formed between the fixed mold and the movable mold, and the branch runners are communicated with the main runner; a vacuum exhaust part is arranged on the end face of the vacuum pipe, reinforcing cavities communicated with the injection molding cavity are formed in the two sides of the fixed mold, rib plates are arranged in the reinforcing cavities in a sealed and sliding mode, and an ejector plate is arranged in the fixed mold. Through mechanical integrated design such as thick area first cooling, thin area delayed cooling, vacuum self-exhausting and synchronous ejection, the warping condition of an injection molding product can be greatly reduced.

Description

Technical Field

[0001] The invention relates to the technical field of automobile processing equipment, in particular to a molding equipment for preventing deformation of injection molded products. Background Art

[0002] Injection molding is one of the most commonly used manufacturing processes for automotive exterior and structural parts, such as bumper fascias, headlight covers, instrument panel trim, fan shrouds, and battery cooling headers. With the trend toward lightweight and large-scale integration of vehicles, these parts generally exhibit complex geometric features such as large size, wide variations in wall thickness, numerous ribs, and thick localized reinforcement columns.

[0003] For example, "CN118849318A" is a molding device for preventing deformation of injection molded products, which relates to the field of injection molding industry technology, including a molding mechanism, a material injection mechanism fixedly installed on the top of the molding mechanism, and the molding mechanism including a supporting base, a concave mold fixedly installed in the supporting base, a liquid injection ring longitudinally slidingly installed on the top of the concave mold, a sealed liquid injection rod fixedly installed on the bottom inside the concave mold, a demoulding push rod longitudinally slidingly installed on the outside of the sealed liquid injection rod, a liquid injection cover plate fixedly installed on the top of the demoulding push rod by stretching a second spring, and the liquid injection cover plate and the demoulding push rod slidingly cooperate. The present invention evenly applies demoulding liquid into the mold through the liquid injection ring and the demoulding push rod, so that the injection molded parts can be demoulded smoothly, preventing the injection molded products from being deformed during the demoulding process; the vibration motor of the present invention can vibrate and pat the injection molded products during the molding process, so that the injection molded products are more complete;

[0004] However, in the existing technology, as the requirements for dimensional accuracy of injection molded products become higher and higher, and the assembly requirements are stricter, many products are deformed, bent, and twisted during the molding process or after molding, resulting in abnormal assembly on the customer side. For example, bumper masks, instrument panel upper shells and other parts are usually made by injection molding. These parts have large areas and thin and uneven wall thickness. Once the cooling is not synchronized, they will bend like wet paper drying in the sun. The warping will cause light to leak through the assembly gaps, screws to not fit into the holes, and even stress cracking, resulting in an extremely high rework and scrap rate. There are many reasons for the warping of parts. For example, the cooling system in the mold after injection molding does not cool the parts evenly. The cooling water channel is close to the piece of plastic, which will cool and shrink first. Therefore, when the thick area shrinks later, the entire part will be arched or twisted. These factors may cause the finished parts to warp, resulting in reduced product quality. Summary of the Invention

[0005] In view of the above existing problems, the present invention is proposed.

[0006] The purpose of the present invention is to solve the problem in the prior art that automobile parts are prone to warping during injection molding.

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0008] On the one hand, the present invention provides a molding device for preventing deformation of injection molded products, which includes a movable mold, a fixed mold and a cooling mechanism. An injection cavity is formed between the movable mold and the fixed mold after the movable mold and the fixed mold are closed. The cooling mechanism is arranged in the movable mold and the fixed mold. The cooling mechanism includes a plurality of first cooling inserts close to the thick area of ​​the injection cavity and a second cooling insert close to the thin area of ​​the injection cavity. The plurality of first cooling inserts and second cooling inserts are distributed in the movable mold and the fixed mold. A main channel is provided on the fixed mold, and a plurality of branch channels are provided between the fixed mold and the movable mold. The branch channels are connected to the main channel, and a vacuum tube is provided at the end of the branch channel. A vacuum exhaust part is provided on the end face of the vacuum tube. Reinforcement cavities connected to the injection cavity are provided on both sides of the fixed mold. A rib plate is provided for sealing and sliding in the reinforcement cavity, and an ejection plate is provided in the fixed mold.

[0009] Furthermore, the first cooling insert and the second cooling insert have the same structure and are both condensers. All the first cooling inserts on the fixed mold or the movable mold are interconnected and all the second cooling inserts are interconnected. The first cooling insert and the second cooling insert are respectively connected to the external cooling water source through the valve body, and are used to cool the corresponding position of the injection cavity by controlling the opening and closing of the corresponding valve body. Taking the lampshade of a car headlight as an example, the first cooling insert is set at the middle lamp cup position and is opened first to ensure that the thick area is frozen quickly to avoid shrinkage. The second cooling insert is located at the edge of the lampshade and is opened after a delay of 1-2 seconds to allow the thin area to solidify and avoid premature freezing of the injection liquid.

[0010] Furthermore, the first cooling insert and the second cooling insert are adapted to the shape of the injection cavity in the fixed mold and the movable mold respectively, the first cooling insert is 6-7 mm away from the injection cavity, and the second cooling insert is 8-10 mm away from the injection cavity.

[0011] Furthermore, the vacuum exhaust component includes a sealing plate and a first spring, one side of the sealing plate is rotatably arranged in the vacuum tube, the sealing plate is sealingly assembled and connected to the vacuum tube, the sealing plate is assembled and connected to the vacuum tube through the first spring, a connecting strip is provided on the sealing plate, the connecting strip sealingly slides through the side wall of the vacuum tube and extends outward, the vacuum tube is connected to an external vacuum pump, and the sealing plate is pushed and rotated to open by pushing the connecting strip inward, thereby driving the vacuum pump to extract the gas in the injection cavity, and then loosening the connecting strip. The first spring pulls the sealing plate and the vacuum tube mouth to seal and close, and the injection liquid will not pass through the sealing plate and flow into the vacuum tube when entering the injection cavity from the branch channel.

[0012] Furthermore, a sliding bar is provided on one side of the rib plate away from the injection molding cavity, and a sliding groove is provided in the reinforcement cavity which is slidably adapted to the sliding bar. The sliding bar and the sliding groove are slidably adapted to install the rib plate. The disassembly direction of the rib plate is different from the disassembly direction of the workpiece. The setting of the rib plate can increase the structural support at the weak position of the injection molded part to ensure its structural stability. In addition, a sliding and removable structure is provided for the rib plate, and rib plates of different structural materials can be selected for installation according to actual conditions to increase the structural strength of the parts that are prone to warping to meet better injection molding requirements.

[0013] The locking plate is fixed to the mold by a locking mechanism, wherein the locking plate includes a limit plate and a second spring, wherein the limit plate is provided with an assembly groove on a side of the limit plate away from the injection cavity, and one end of the limit plate is rotatably connected to the assembly groove toward the inner end of the fixed mold, and the limit plate is assembled and connected to the assembly groove by the second spring. The fixed mold is provided with a triangular groove adapted to the limit plate in the expanded state, and the limit plate is a magnetic plate, and a magnetic block that is mutually repelled by the magnetic plate is electrically connected to an external power supply. When the rib plate is installed, the rib plate is slidably inserted into the slide groove, and the limit plate is rotated and locked in the triangular groove under the thrust of the second spring. At this time, the rib plate is difficult to slide out of the slide groove, which can ensure the stability of the rib plate during the injection molding process. When disassembling and replacing, the magnetic block is electrically connected to the external power supply, and the magnetic block and the limit plate repel each other, pushing the limit plate to compress the second spring and move it into the assembly groove. At this time, the rib plate can be smoothly pulled out.

[0014] Furthermore, the ejector plate is slidably arranged in the fixed mold, and a plurality of ejector pins are provided on the ejector plate. The ejector pins are arranged on a side of the ejector plate facing the injection cavity. A disassembly groove connected to the injection cavity is provided in the fixed mold, and the ejector pins are slidably arranged in the disassembly groove. Both ends of the ejector plate are linked to the movable mold. When the movable mold is disassembled, the movable mold is separated from the fixed mold, and the movable mold is separated from the injection molded part. The movable mold continues to move and the separation range from the fixed mold increases, driving the ejector plate to move toward the movable mold. At this time, the ejector plate and the ejector pins move toward the injection molded part as a whole, and the ejector pins eject the injection molded part from the injection cavity, thereby facilitating the separation of the injection molded part.

[0015] Furthermore, both ends of the ejector plate are respectively slidably extended to both sides of the fixed mold, and fixed frames are respectively provided on both sides of the movable mold. Both sides of the ejector plate are assembled and connected to the fixed frames through telescopic shafts. When the telescopic shaft is fully retracted, the movable mold and the fixed mold are just closed. When the movable mold is separated from the fixed mold, the telescopic shaft gradually extends. After the injection molded parts on the movable mold and the fixed mold are separated for a distance, the telescopic shaft is just extended to the maximum. The movable mold continues to move, and the ejector plate can be pulled toward the injection cavity until the end face of the ejector separates the molded injection molded part from the injection cavity in the fixed mold, thereby saving the operation of secondary separation between the injection molded part and the fixed mold.

[0016] Furthermore, an adjustment groove is provided on the movable mold or the fixed mold at the diversion channel, and a sealing block is provided in the adjustment groove for sealing and sliding. The sealing block is hingedly provided with a hinge bar on the side away from the diversion channel, and a push rod is provided for sliding in the movable mold or the fixed mold. The push rod is arranged at one inner end and is hinged to the end face of the hinge bar. By pushing the push rod, the hinge bar tends to be vertical. At this time, the distance between the sealing block and the push rod increases. At this time, the sealing block moves into the diversion channel and occupies the space of the diversion channel to reduce the flow rate of the injection liquid in the diversion channel. Conversely, the diameter of the diversion channel can be increased, making it easier for the injection liquid to pass through the diversion channel, avoiding the formation of injection cavity and ensuring product quality.

[0017] The beneficial effects of the present invention are:

[0018] Before the injection molding process, the movable mold is slowly brought close to the fixed mold, and injection molding is performed into the main channel through the injection molding machine nozzle. After the mold is closed, the branch channel between the fixed mold and the movable mold forms a complete channel, and the injection liquid in the main channel flows evenly into multiple branch channels and enters the injection cavity. The vacuum exhaust part is provided, which is used to connect the injection cavity with the vacuum tube before injection molding, wherein the vacuum tube is connected to the external vacuum pump for extracting excess gas in the injection cavity, and the first cooling insert and the second cooling insert are respectively controlled by the first cooling insert. The inserts are distributed in the thick area of ​​the injection cavity, while the second cooling insert is set in the thin area. When the injection liquid enters the injection cavity, the first cooling insert is driven to cool the injection liquid in the thick area first, and then the second cooling insert is driven to cool the injection liquid in the thin area, so that different wall thickness areas can complete solidification almost at the same time, greatly reducing the local shrinkage difference, thereby greatly avoiding the warping of the thin edges of the injection molded products. In addition, for some narrow locations of the injection cavity structure, ribs are slidably set in these places to support and reinforce the weak locations. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 A three-dimensional diagram of a molding device for preventing deformation of injection molded products provided by the present invention;

[0021] Figure 2 A schematic diagram of a fixed mold structure of a molding device for preventing deformation of injection molded products provided by the present invention;

[0022] Figure 3A schematic diagram of the internal structure of a fixed mold of a molding device for preventing deformation of injection molded products provided by the present invention;

[0023] Figure 4 A schematic diagram of the internal structure of a fixed mold of a molding device for preventing deformation of injection molded products provided by the present invention;

[0024] Figure 5 The present invention provides a molding device for preventing deformation of injection molded products Figure 4 A schematic diagram of the structure at center A;

[0025] Figure 6 A schematic diagram of a vacuum exhaust component of a molding device for preventing deformation of injection molded products provided by the present invention;

[0026] Figure 7 A schematic diagram of a movable mold of a molding device for preventing deformation of injection molded products provided by the present invention;

[0027] Figure 8 A schematic diagram of a movable mold of a molding device for preventing deformation of injection molded products provided by the present invention;

[0028] Figure 9 A schematic diagram of the positions of a sealing block and a diversion channel of a molding device for preventing deformation of injection molded products provided by the present invention.

[0029] Legend:

[0030] 1. Moving mold; 2. Fixed mold; 3. Injection cavity; 411. First cooling insert; 412. Second cooling insert; 511. Main flow channel; 512. Branch flow channel; 513. Vacuum tube; 514. Vacuum exhaust part; 611. Reinforcement cavity; 612. Rib plate; 6121. Slide bar; 6122. Slide groove; 613. Ejector plate; 614. Ejector pin; 711. Sealing plate; 712. First spring; 713. Connecting strip; 811. Limiting plate; 812. Second spring; 813. Assembly groove; 814. Triangular groove; 815. Magnetic block; 911. Disassembly groove; 912. Fixing bracket; 913. Telescopic shaft; 101. Adjustment groove; 102. Sealing block; 103. Hinge strip; 104. Push rod. DETAILED DESCRIPTION

[0031] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0032] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0033] Secondly, as referred to herein, "one embodiment" or "an embodiment" refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in various places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive of other embodiments.

[0034] See also Figures 1-9 The present invention provides a technical solution: a molding device for preventing deformation of injection molded products, comprising a movable mold 1, a fixed mold 2 and a cooling mechanism. An injection cavity 3 is formed between the movable mold 1 and the fixed mold 2 after the movable mold 1 and the fixed mold 2 are closed. The cooling mechanism is arranged in the movable mold 1 and the fixed mold 2. The cooling mechanism comprises a plurality of first cooling inserts 411 close to a thick area of ​​the injection cavity 3 and a second cooling insert 412 close to a thin area of ​​the injection cavity 3. The plurality of first cooling inserts 411 and the second cooling inserts 412 are distributed in the movable mold 1 and the fixed mold 2. A main channel 511 is provided on the fixed mold 2, and a plurality of branch channels 512 are provided between the fixed mold 2 and the movable mold 1. The branch channels 512 are connected to the main channel 511. A vacuum tube 513 is provided at the end of the branch channel 512. A vacuum exhaust part 514 is provided on the end face of the vacuum tube 513. Reinforcement cavities 611 connected to the injection cavity 3 are provided on both sides of the fixed mold 2. A rib plate 612 is provided in the reinforcement cavity 611 for sealing and sliding. An ejection plate 613 is provided in the fixed mold 2.

[0035] like Figures 1-9 As shown, the first cooling insert 411 and the second cooling insert 412 have the same structure and are both condensers. All the first cooling inserts 411 on the fixed mold 2 or the movable mold 1 are interconnected and all the second cooling inserts 412 are interconnected. The first cooling insert 411 and the second cooling insert 412 are respectively connected to the external cooling water source through the valve body, and are used to cool the corresponding position of the injection cavity 3 by controlling the opening and closing of the corresponding valve body. Taking the lampshade of a car headlight as an example, the first cooling insert 411 is set at the middle lamp cup position. It is opened first to ensure that the thick area is frozen quickly to avoid shrinkage. The second cooling insert 412 is located at the edge of the lampshade and is opened after a delay of 1-2 seconds to allow the thin area to solidify to avoid premature freezing of the injection liquid.

[0036] like Figures 1-9 As shown, the first cooling insert 411 and the second cooling insert 412 are adapted to the shape of the injection cavity 3 in the fixed mold 2 and the movable mold 1 respectively. The first cooling insert 411 is 6-7 mm away from the injection cavity 3, and the second cooling insert 412 is 8-10 mm away from the injection cavity 3.

[0037] like Figures 1-9As shown, the vacuum exhaust component 514 includes a sealing plate 711 and a first spring 712. One side of the sealing plate 711 is rotatably arranged in the vacuum tube 513. The sealing plate 711 is sealed and assembled with the vacuum tube 513. The sealing plate 711 is assembled with the vacuum tube 513 through the first spring 712. A connecting strip 713 is provided on the sealing plate 711. The connecting strip 713 seals and slides through the side wall of the vacuum tube 513 and extends outward. The vacuum tube 513 is connected to an external vacuum pump. By pushing the connecting strip 713 inward, the sealing plate 711 is pushed and rotated to open, and then the vacuum pump is driven to extract the gas in the injection cavity 3, and then the connecting strip 713 is loosened. The first spring 712 pulls the sealing plate 711 and the vacuum tube 513 port to seal and close. When the injection liquid enters the injection cavity 3 from the branch channel 512, it will not pass through the sealing plate 711 and flow into the vacuum tube 513.

[0038] like Figures 1-9 As shown, a slide bar 6121 is provided on the side of the rib plate 612 away from the injection cavity 3, and a slide groove 6122 is provided in the reinforcement cavity 611 for sliding adaptation with the slide bar 6121. The slide bar 6121 and the slide groove 6122 are slidably adapted to install the rib plate 612. The disassembly direction of the rib plate 612 is different from the disassembly direction of the workpiece. The setting of the rib plate 612 can increase the structural support at the weak position of the injection molded part to ensure its structural stability. In addition, a sliding detachable structure is provided for the rib plate 612. Rib plates 612 of different structural materials can be selected for installation according to actual conditions to increase the structural strength of the warping-prone part to meet better injection molding requirements.

[0039] like Figures 1-9 As shown, the rib plate 612 is engaged with the interior of the fixed mold 2 through a locking mechanism, and the locking mechanism includes a limit plate 811 and a second spring 812. The rib plate 612 is provided with an assembly groove 813 on the side away from the injection cavity 3. One end of the limit plate 811 is connected to the assembly groove 813 and rotated toward one end inside the fixed mold 2. The limit plate 811 is assembled and connected to the assembly groove 813 through the second spring 812. A triangular groove 814 is provided in the fixed mold 2 to match the limit plate 811 in the expanded state. The limit plate 811 is a magnetic plate. A magnetic block 815 that is mutually repelled with the magnetic plate is provided in the triangular groove 814. The magnetic block 815 5 is electrically connected to an external power supply. When installing the rib plate 612, the rib plate 612 is slidably inserted into the slide groove 6122. The limiting plate 811 rotates and engages in the triangular groove 814 under the thrust of the second spring 812. At this time, the rib plate 612 is difficult to slide out of the slide groove 6122, which can ensure the stability of the rib plate 612 during the injection molding process. When disassembling and replacing, the magnetic block 815 is electrically connected to the external power supply. The magnetic block 815 and the limiting plate 811 repel each other, pushing the limiting plate 811 to compress the second spring 812 and move it into the assembly groove 813. At this time, the rib plate 612 can be smoothly pulled out.

[0040] like Figures 1-9As shown, the ejector plate 613 is slidably arranged in the fixed mold 2, and a plurality of ejector pins 614 are provided on the ejector plate 613. The ejector pins 614 are arranged on the side of the ejector plate 613 facing the injection cavity 3. A disassembly groove 911 connected to the injection cavity 3 is provided in the fixed mold 2, and the ejector pins 614 are slidably arranged in the disassembly groove 911. Both ends of the ejector plate 613 are linked with the movable mold 1. By disassembling the movable mold 1, the movable mold 1 is separated from the fixed mold 2 during disassembly, and the movable mold 1 is separated from the injection molded part. The movable mold 1 continues to move and the separation range from the fixed mold 2 increases, driving the ejector plate 613 to move toward the movable mold 1. At this time, the ejector plate 613 and the ejector pins 614 move toward the injection molded part as a whole, and the ejector pins 614 eject the injection molded part from the injection cavity 3, which facilitates the separation of the injection molded part.

[0041] like Figures 1-9 As shown, the two ends of the ejector plate 613 slide and extend to the two sides of the fixed mold 2 respectively, and fixed frames 912 are provided on both sides of the movable mold 1. The two sides of the ejector plate 613 are assembled and connected with the fixed frames 912 through telescopic shafts 913. When the telescopic shafts 913 are fully retracted, the movable mold 1 and the fixed mold 2 are just molded together. When the movable mold 1 is separated from the fixed mold 2, the telescopic shafts 913 gradually extend. After the injection molded parts on the movable mold 1 and the fixed mold 2 are separated for a distance, the telescopic shafts 913 are just extended to the maximum. The movable mold 1 continues to move, and can pull the ejector plate 613 to move toward the injection cavity 3 until the end surface of the ejector pin 614 separates the molded injection molded part from the injection cavity 3 in the fixed mold 2, which saves the operation of separating the injection molded part from the fixed mold 2 for the second time.

[0042] like Figures 1-9 As shown, an adjustment groove 101 is provided on the movable mold 1 or the fixed mold 2 located at the diverter channel 512, and a sealing block 102 is provided in the adjustment groove 101 for sealing and sliding. The sealing block 102 is hingedly provided with a hinge bar 103 on the side away from the diverter channel 512, and a push rod 104 is provided for sliding in the movable mold 1 or the fixed mold 2. The push rod 104 is arranged at one end inside and is hinged to the end face of the hinge bar 103. By pushing the push rod 104, the hinge bar 103 tends to be vertical. At this time, the distance between the sealing block 102 and the push rod 104 increases. At this time, the sealing block 102 moves into the diverter channel 512, and by occupying the space of the diverter channel 512, the flow rate of the injection liquid in the diverter channel 512 is reduced. Conversely, the diameter of the diverter channel 512 can be increased, so that the injection liquid can pass through the diverter channel 512 more easily, thereby avoiding the formation of injection cavity and ensuring product quality.

[0043] Working principle: Before the injection molding process, the movable mold 1 is slowly brought close to the fixed mold 2, and injection is carried out into the main channel 511 through the nozzle of the injection molding machine. After the mold is closed, the branch channel 512 between the fixed mold 2 and the movable mold 1 forms a complete channel. The injection liquid in the main channel 511 flows evenly into the multiple branch channels 512 and enters the injection cavity 3. The vacuum exhaust part 514 provided therein is used to connect the injection cavity 3 with the vacuum tube 513 before injection. The vacuum tube 513 is connected to an external vacuum pump to extract excess gas in the injection cavity 3, and is used to cool the first cooling insert 411 and the second cooling insert 412. They are controlled separately, wherein the first cooling insert 411 is distributed in the thick area of ​​the injection cavity 3, and the second cooling insert 412 is arranged in the thin area. When the injection liquid enters the injection cavity 3, the first cooling insert 411 is driven to first cool the injection liquid in the thick area, and then the second cooling insert 412 is driven to cool the injection liquid in the thin area, so that different wall thickness areas are solidified almost at the same time, which greatly weakens the local shrinkage difference, thereby avoiding the warping of the thin edges of the injection molded products to a great extent. In addition, for some relatively narrow locations of the injection cavity 3, ribs 612 are slidably set at these locations, and the ribs 612 are used to support and reinforce the weak locations.

[0044] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A molding device for preventing deformation of injection molded products, comprising a movable mold (1), a fixed mold (2) and a cooling mechanism, wherein an injection cavity (3) is formed between the movable mold (1) and the fixed mold (2) after being clamped, and the cooling mechanism is arranged in the movable mold (1) and the fixed mold (2), and is characterized in that: The cooling mechanism comprises a plurality of first cooling inserts (411) close to the thick area of ​​the injection cavity (3) and a second cooling insert (412) close to the thin area of ​​the injection cavity (3), wherein the plurality of the first cooling inserts (411) and the second cooling inserts (412) are distributed in both the movable mold (1) and the fixed mold (2), a main flow channel (511) is provided on the fixed mold (2), and a plurality of branch flow channels (512) are provided between the fixed mold (2) and the movable mold (1), The branch channel (512) is connected to the main channel (511), the end of the branch channel (512) is connected to a vacuum tube (513), and the end surface of the vacuum tube (513) is provided with a vacuum exhaust component (514). Reinforcement cavities (611) connected to the injection cavity (3) are opened on both sides of the fixed mold (2), and a rib plate (612) is provided in the reinforcement cavity (611) for sealing and sliding. An ejection plate (613) is provided in the fixed mold (2).

2. A molding device for preventing deformation of injection molded products according to claim 1, characterized in that: The first cooling insert (411) and the second cooling insert (412) have the same structure and are both condensation tubes. All the first cooling inserts (411) on the fixed mold (2) or the movable mold (1) are interconnected and all the second cooling inserts (412) are interconnected. The first cooling insert (411) and the second cooling insert (412) are respectively connected to an external cooling water source through a valve body.

3. A molding device for preventing deformation of injection molded products according to claim 2, characterized in that: The first cooling insert (411) and the second cooling insert (412) are adapted to the shape of the injection cavity (3) in the fixed mold (2) and the movable mold (1), respectively; the first cooling insert (411) is 6-7 mm away from the injection cavity (3), and the second cooling insert (412) is 8-10 mm away from the injection cavity (3).

4. A molding device for preventing deformation of injection molded products according to claim 3, characterized in that: The vacuum exhaust component (514) includes a sealing plate (711) and a first spring (712). One side of the sealing plate (711) is rotatably arranged in the vacuum tube (513). The sealing plate (711) is assembled and connected to the vacuum tube (513) in a sealing manner. The sealing plate (711) is assembled and connected to the vacuum tube (513) through the first spring (712). A connecting strip (713) is provided on the sealing plate (711). The connecting strip (713) seals and slides through the side wall of the vacuum tube (513) and extends outside. The vacuum tube (513) is connected to an external vacuum pump.

5. The molding device for preventing deformation of injection molded products according to claim 4, characterized in that: A sliding bar (6121) is provided on a side of the rib plate (612) away from the injection cavity (3), and a sliding groove (6122) slidably adapted to the sliding bar (6121) is provided in the reinforcement cavity (611).

6. The molding device for preventing deformation of injection molded products according to claim 5, characterized in that: The rib plate (612) is engaged with the interior of the fixed mold (2) through an engaging mechanism, the engaging mechanism comprising a limit plate (811) and a second spring (812), an assembly groove (813) is provided on a side of the rib plate (612) away from the injection cavity (3), one end of the limit plate (811) is rotatably connected to the assembly groove (813) toward one end inside the fixed mold (2), the limit plate (811) is assembled and connected to the assembly groove (813) through the second spring (812), a triangular groove (814) adapted to the limit plate (811) in the expanded state is provided in the fixed mold (2), the limit plate (811) is a magnetic plate, a magnetic block (815) is provided in the triangular groove (814) and is mutually repelled from the magnetic plate, and the magnetic block (815) is electrically connected to an external power supply.

7. The molding device for preventing deformation of injection molded products according to claim 1, characterized in that: The ejector plate (613) is slidably arranged in the fixed mold (2); a plurality of ejector pins (614) are provided on the ejector plate (613); the ejector pins (614) are arranged on a side of the ejector plate (613) facing the injection cavity (3); a disassembly groove (911) communicating with the injection cavity (3) is provided in the fixed mold (2); the ejector pins (614) are slidably arranged in the disassembly groove (911); and both ends of the ejector plate (613) are arranged in linkage with the movable mold (1).

8. The molding device for preventing deformation of injection molded products according to claim 7, characterized in that: The two ends of the ejection plate (613) are respectively slidably extended to the two sides of the fixed mold (2), and the two sides of the movable mold (1) are respectively provided with fixed frames (912), and the two sides of the ejection plate (613) are assembled and connected with the fixed frames (912) through telescopic shafts (913).

9. The molding device for preventing deformation of injection molded products according to claim 8, characterized in that: An adjusting groove (101) is provided on the movable mold (1) or the fixed mold (2) located at the diverter channel (512), a sealing block (102) is provided in the adjusting groove (101) for sealing and sliding, a hinge bar (103) is hingedly provided on one side of the sealing block (102) away from the diverter channel (512), a push rod (104) is provided in the movable mold (1) or the fixed mold (2) for sliding, and the push rod (104) is provided at one inner end and is hingedly provided with the end face of the hinge bar (103).

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