Plastic injection molding device with controllable fluid plastic discharging speed

Abstract

The invention discloses a plastic injection molding device with a controllable fluid plastic discharging speed, and belongs to the technical field of injection molding, the plastic injection molding device comprises an injection molding structure, a power output structure and a self-adaptive displacement assembly, and the injection molding structure, the power output structure and the self-adaptive displacement assembly are all assembled on the same bearing foundation; the power output structure is in transmission fit with the injection molding structure to provide feeding power, and the self-adaptive displacement assembly is in linkage with the injection molding structure and the power output structure and used for controlling transmission connection and disconnection of the power output structure and the injection molding structure. Through the self-adaptive material supplementing design of the power output structure, the driving motor is in a standby state continuously after the cavity is filled, a cavity generated by cooling shrinkage of fluid plastic can be filled in time, and the defect of material shortage is avoided; the self-adaptive displacement assembly achieves synchronous linkage of die assembly and material cutting, material supply is stopped immediately when the die is separated, excess material overflow and product flash are avoided, it is guaranteed that the appearance of a product is regular, and the rejection rate is remarkably reduced.

Description

Technical Field

[0001] This invention belongs to the field of injection molding technology, specifically referring to a plastic injection molding device with controllable fluid plastic discharge speed. Background Technology

[0002] In the field of plastic injection molding, the stability of material supply, equipment protection, and production adaptability of injection molding equipment directly affect product qualification rate and production efficiency. Existing injection molding equipment generally suffers from the following technical pain points: First, the coordination between the feeding system and mold forming is insufficient. When the mold cavity is full, the feeding auger is prone to damage due to the inability to stop and continue to bear force, or the inability to replenish material in time after stopping the machine will cause product defects due to material shortage. Second, the mold closing and feeding actions lack precise linkage. When the mold separates, the feeding system tends to continuously push fluid plastic, resulting in excess material overflow, flash on the product, and increased scrap rate and cleaning costs. Third, the power output is unstable during the mold closing process. The instantaneous impact force can easily cause the mold to collide and deform, affecting the accuracy of the cavity. Fourth, traditional equipment relies on complex electrical control modules to achieve start-stop control, which is not only cumbersome in structure and has a high failure rate, but also has response delay problems, making it difficult to adapt to the needs of efficient continuous production.

[0003] To address the aforementioned issues, there is an urgent need to develop an injection molding device that is simple in structure, highly collaborative, and reliably protected. Through adaptive design of the mechanical structure, precise linkage between material feeding, mold closing, and material replenishment can be achieved, balancing production efficiency and product quality while reducing equipment maintenance costs. Summary of the Invention

[0004] In view of the above situation and to overcome the defects of the prior art, the present invention provides a plastic injection molding device with controllable fluid plastic discharge speed, which effectively solves the problems currently on the market.

[0005] The technical solution adopted by the present invention is as follows: The present invention proposes a plastic injection molding device with controllable fluid plastic discharge speed, including an injection molding structure, a power output structure, and an adaptive displacement component. The injection molding structure, the power output structure, and the adaptive displacement component are all assembled on the same bearing base. The power output structure and the injection molding structure are driven together to provide feeding power. The adaptive displacement component is linked with the injection molding structure and the power output structure respectively, and is used to control the transmission on and off of the power output structure and the injection molding structure.

[0006] Furthermore, the injection molding structure includes a placement base, a feeding auger, a barrel, a fixed mold, a mounting plate, an electric telescopic rod, a moving mold, and a buffer component. The placement base serves as the overall load-bearing foundation, and the feeding auger, barrel, fixed mold, and mounting plate are all fixedly installed on the upper surface of the placement base. The discharge port of the barrel passes through and is fixedly connected to the feeding auger, and heating elements are evenly arranged on the feeding auger. The electric telescopic rod is fixedly installed on the mounting plate, and the moving mold is fixedly connected to the output end of the electric telescopic rod and is adapted to the fixed mold to form a cavity. The buffer component is located between the mounting plate and the moving mold.

[0007] Furthermore, the power output structure includes a fixed frame, a drive motor, a drive shaft, fixed blocks, a first fixed bracket, a second fixed bracket, a rotating friction disc, a telescopic block, a return spring, and a telescopic spring. The fixed frame is fixedly installed on the upper surface of the base, the drive motor is fixed inside the fixed frame, and the drive shaft is fixedly connected to the output end of the drive motor. The fixed blocks are evenly distributed and fixedly connected to the end of the drive shaft away from the drive motor. The first and second fixed brackets are slidably connected to the upper surface of the base and located inside the fixed frame. The rotating friction disc is rotatably connected between the first and second fixed brackets and can be detachably abutted against the rotating shaft of the feeding auger.

[0008] Furthermore, the telescopic blocks are evenly distributed and slidably connected to the inner surface of the rotating friction disk. The return spring is located between the telescopic blocks and the rotating friction disk, and its two ends are fixedly connected to the telescopic blocks and the rotating friction disk respectively. The side of the telescopic block near the drive shaft is set as an inclined surface and is adapted to the fixed block. The telescopic spring is located between the fixed bracket and the fixed frame, and its two ends are fixedly connected to the fixed bracket and the fixed frame respectively.

[0009] Furthermore, the adaptive displacement component includes hydraulic cylinder one, hydraulic cylinder two, piston rod, connecting spring, conveying pipe and docking plate; hydraulic cylinder one and hydraulic cylinder two are both fixedly installed on the upper surface of the placement base, and the piston rod is slidably connected to hydraulic cylinder one and hydraulic cylinder two respectively; one end of the connecting spring is fixedly connected to the piston rod, and the other end is fixedly connected to hydraulic cylinder one or hydraulic cylinder two; the two ends of the conveying pipe pass through and are fixedly connected to hydraulic cylinder one and hydraulic cylinder two respectively.

[0010] Furthermore, the piston rod on hydraulic cylinder one is fixedly connected to the moving mold, and the piston rod on hydraulic cylinder two is fixedly connected to fixed bracket two through a mating plate; the mating plate passes through and is slidably connected to the fixed frame.

[0011] Furthermore, the rotating friction disc, supported by the elasticity of the telescopic spring, abuts against the rotating shaft of the feeding auger. The fixed block engages with the telescopic block for transmission, driving the rotating friction disc to rotate the feeding auger through friction.

[0012] Furthermore, once the cavity of the injection-molded structure is filled, the feeding auger stops rotating, and the fixed block overcomes the elastic force of the return spring through the inclined surface of the telescopic block, pushing the telescopic block into the interior of the rotating friction disk, driving the motor to continue idling.

[0013] Furthermore, when the moving mold moves away from the fixed mold, the hydraulic oil in the first hydraulic cylinder flows into the second hydraulic cylinder through the delivery pipe, pushing the piston rod and docking plate of the second hydraulic cylinder to move, thereby causing the fixed bracket two to move synchronously with the rotating friction disc, so that the rotating friction disc separates from the feeding auger.

[0014] Furthermore, the electric telescopic rod has adjustable output thrust and telescopic stroke, and the buffer is an elastic buffer structure used to offset the instantaneous impact force when the electric telescopic rod is pushed forward.

[0015] The beneficial effects achieved by the present invention using the above structure are as follows:

[0016] (1) Through the adaptive feeding design of the power output structure, the drive motor continues to standby after the cavity is filled, which can fill the cavity generated by the cooling and shrinkage of the fluid plastic in time and avoid material shortage defects; the adaptive displacement component realizes the synchronous linkage of mold closing and material cutting, and stops the material supply immediately when the mold is separated, eliminating the overflow of residual material and product flash, ensuring the product has a regular shape and significantly reducing the scrap rate.

[0017] (2) After the cavity is filled, the inclined structure of the fixed block and the telescopic block realizes overload avoidance, avoids the drive motor from being damaged by overcurrent and overheating due to stalling, and at the same time reduces the hard impact between transmission components; the buffer buffer buffers the instantaneous thrust of mold closing to prevent mold collision and deformation; each component is linked by mechanical structure to reduce the dependence on the electrical control module, reduce the failure points and maintenance frequency, and extend the overall service life of the equipment.

[0018] (3) The drive motor does not need to be frequently started and stopped, and the continuous and stable operation reduces energy waste and equipment wear; the entire cycle of "feeding-mold closing-replenishing-demolding-cutting off" can be completed without manual intervention, simplifying the operation process and avoiding material supply delay caused by secondary start-up; the coordinated response of each structure is rapid, with no control lag problem, ensuring production continuity and significantly improving overall production efficiency. Attached Figure Description

[0019] Figure 1 This is a perspective view of a plastic injection molding apparatus with controllable fluid plastic discharge speed proposed in this invention;

[0020] Figure 2 This is a three-dimensional schematic diagram of the injection-molded structure;

[0021] Figure 3 Partial cross-section of the power output structure Figure 1 ;

[0022] Figure 4 Partial cross-section of the power output structure Figure 2 ;

[0023] Figure 5 This is a partial structural diagram of the power output structure;

[0024] Figure 6 This is an exploded view of part of the power output structure;

[0025] Figure 7 A cross-sectional view of the rotating friction disc;

[0026] Figure 8 This is a cross-sectional view of hydraulic cylinder one.

[0027] Among them, 1. Injection molding structure; 101. Placement base; 102. Feeding auger; 103. Material cylinder; 104. Fixed mold; 105. Mounting plate; 106. Electric telescopic rod; 107. Moving mold; 108. Buffer component; 2. Power output structure; 201. Fixed frame; 202. Drive motor; 203. Drive shaft; 204. Fixed block; 205. Fixed bracket one; 206. Fixed bracket two; 207. Rotating friction disc; 208. Telescopic block; 209. Return spring; 210. Telescopic spring; 3. Adaptive displacement component; 301. Hydraulic cylinder one; 302. Hydraulic cylinder two; 303. Piston rod; 304. Connecting spring; 305. Conveying pipe; 306. Connecting plate.

[0028] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof. Detailed Implementation

[0029] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0030] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0031] like Figures 1-8 As shown.

[0032] In some embodiments, the injection molding structure 1 may include a base 101 for supporting other components of the device; a feeding auger 102 fixedly installed on the upper surface of the base 101 for conveying raw materials required for injection molding; a barrel 103 fixedly installed on the base 101, with the discharge port of the barrel 103 passing through and fixedly connected to the feeding auger 102; a fixed mold 104 fixedly installed on the upper surface of the base 101; a mounting plate 105 fixedly installed on the base 101; an electric telescopic rod 106 fixedly installed on the mounting plate 105 for providing power for mold closing; a moving mold 107 fixedly installed at the output end of the electric telescopic rod 106, which together with the fixed mold 104 forms the shape of the product; and a buffer 108 disposed between the mounting plate 105 and the moving mold 107 for buffering the thrust provided by the electric telescopic rod 106.

[0033] Heating elements are uniformly arranged on 102 to heat the plastic particles inside 102 and melt them into a fluid.

[0034] The injection molding structure 1 uses the base 101 as its overall support foundation, stably assembling all components such as the feeding auger 102, the material cylinder 103, the fixed mold 104, and the mounting plate 105 to ensure the structural integrity and stability of the entire device during operation. During operation, the raw materials required for injection molding are first transported through the feeding auger 102 to the material cylinder 103. After pre-processing within the material cylinder 103, the raw materials are continuously transported to the area enclosed by the fixed mold 104 and the moving mold 107. Subsequently, the electric telescopic rod 106 fixed on the mounting plate 105 is activated, initiating the mold closing action. A stable power source is provided to drive the movable mold 107, whose output end is fixed, to move towards the fixed mold 104 until the movable mold 107 and the fixed mold 104 are precisely fitted together to form a cavity consistent with the target product. During this process, the buffer 108 located between the mounting plate 105 and the movable mold 107 plays a role in buffering the instantaneous thrust generated when the electric telescopic rod 106 is pushed forward, avoiding excessive thrust that could cause mold collision damage or cavity deformation. After the raw material is formed inside the cavity, the electric telescopic rod 106 retracts, driving the movable mold 107 to reset, and the molded product can be removed, completing one injection molding cycle.

[0035] In this embodiment, the base 101 provides unified support and fixation for all components, avoiding operational shaking caused by the scattered installation of each component. This ensures precise coordination in all stages, including material feeding, mold closing, and molding, reducing injection molding failures caused by component displacement and improving the overall reliability of the device. The electric telescopic rod 106 provides stable and adjustable power for the mold closing action, enabling precise control of the moving mold 107's movement distance and contact force, ensuring precise contact between the moving mold 107 and the fixed mold 104, and guaranteeing the consistency of the cavity shape. At the same time, the buffer 108 effectively buffers the instantaneous impact force during mold closing, preventing mold damage and cavity deformation, reducing defects in the molded products, and significantly improving the pass rate and quality stability of the injection molded products.

[0036] In some embodiments, the power output structure 2 may include a fixed frame 201, fixedly mounted on the upper surface of the placement base 101; a drive motor 202, fixedly mounted inside the fixed frame 201, serving as a power source; a drive shaft 203, fixedly connected to the output end of the drive motor 202; fixed blocks 204, evenly distributed on the end of the drive shaft 203 away from the drive motor 202, and fixedly connected to the drive shaft 203; a first fixed bracket 205, slidably connected to the upper surface of the placement base 101, and disposed inside the fixed frame 201; and a second fixed bracket 206, slidably connected to the upper surface of the placement base 101, and disposed inside the fixed frame 201. Inside the fixed frame 201: a rotating friction disc 207 is located between a first fixed bracket 205 and a second fixed bracket 206, and the rotating friction disc 207 is rotatably connected to the first fixed bracket 205 and the second fixed bracket 206; telescopic blocks 208 are evenly distributed on the inner surface of the rotating friction disc 207, and the telescopic blocks 208 are slidably connected to the rotating friction disc 207; a return spring 209 is located between the telescopic blocks 208 and the rotating friction disc 207, with one end fixedly connected to the telescopic blocks 208 and the other end fixedly connected to the rotating friction disc 207; a telescopic spring 210 is located between the first fixed bracket 205 and the fixed frame 201, with one end fixedly connected to the first fixed bracket 205 and the other end fixedly connected to the fixed frame 201.

[0037] The end of the telescopic block 208 near the drive shaft 203 has a slope.

[0038] The power output structure 2 uses a fixed frame 201 as the mounting carrier and is fixedly assembled on the upper surface of the placement base 101. It works in conjunction with the injection molding structure 1 to provide auxiliary power support for the device. During operation, the drive motor 202, which is fixedly installed inside the fixed frame 201, starts and drives the drive shaft 203, which is fixedly connected to its output end, to rotate synchronously as the core power source. When the drive shaft 203 rotates, the fixed blocks 204, which are evenly distributed at the end away from the drive motor 202, rotate together with the drive shaft 203. Initially, the rotating friction disk 207 abuts against the rotating shaft of the feeding auger 102, and the thrust provided by the fixed blocks 204 cannot overcome the support force provided by the return spring 209 for the telescopic block 208. The drive motor 202, through the fixed blocks 204 set on the drive shaft 203 and the fixed blocks 204 set on the rotating friction disk 207, rotates together with the drive shaft 208. The telescopic block 208 pushes the rotating friction disk 207 to rotate. The rotating friction disk 207 drives the feeding auger 102 to rotate through the friction between it and the feeding auger 102, thus completing the feeding. When the cavity between the moving mold 107 and the fixed mold 104 is filled, the feeding auger 102 can no longer rotate to feed. At this time, the friction between the feeding auger 102 and the rotating friction disk 207 increases. The fixed block 204 set on the drive shaft 203 pushes the telescopic block 208 against the support force provided by the return spring 209 and pushes it into the rotating friction disk 207 to continue rotating through the inclined surface of the telescopic block 208 near the end of the drive shaft 203. At this time, the drive motor 202 does not need to stop running, so that it can be filled in time when the cavity appears after the plastic between the moving mold 107 and the fixed mold 104 cools down, and will not cause damage to the drive motor 202.

[0039] In this embodiment, during the feeding stage, the feeding auger 102 is driven by friction transmission to accurately supply material. After the mold cavity is filled, it automatically switches to the "idle avoidance" mode, which can wait for the replenishment demand after the plastic cools down without stopping the machine. This avoids the material supply delay caused by secondary startup, ensures the integrity of injection molding, and reduces the scrap rate due to material shortage. When the mold cavity is filled and the feeding auger 102 cannot rotate, the fixing block 204 achieves "overload avoidance" through the inclined structure of the telescopic block 208, which avoids the drive motor 202 from being damaged by overcurrent and overheating due to stalling. At the same time, it reduces the hard impact between transmission components, reduces the probability of wear, and reduces equipment maintenance costs and the frequency of downtime for maintenance.

[0040] In some embodiments, the adaptive displacement component 3 may include a hydraulic cylinder 301 fixedly mounted on the upper surface of the placement base 101; a hydraulic cylinder 302 fixedly mounted on the upper surface of the placement base 101; a piston rod 303 slidably connected to the hydraulic cylinder 301 and the hydraulic cylinder 302; a connecting spring 304 fixedly connected at one end to the piston rod 303 and at the other end to the hydraulic cylinder 301 and the hydraulic cylinder 302; a conveying pipe 305 disposed between the hydraulic cylinder 301 and the hydraulic cylinder 302, one end of the conveying pipe 305 passing through and fixedly connected to the hydraulic cylinder 301, and the other end of the conveying pipe 305 passing through and fixedly connected to the hydraulic cylinder 302; and a docking plate 306 fixedly connected to the output end of the hydraulic cylinder 302.

[0041] The piston rod 303 on the hydraulic cylinder 301 is fixedly connected to the moving mold 107, and the mating plate 306 passes through and is slidably connected to the fixed frame 201.

[0042] When the moving mold 107 moves, the moving mold 107 uses the piston rod 303 to transport the hydraulic oil in the hydraulic cylinder 1 301 to the hydraulic cylinder 2 302 through the delivery pipe 305. After receiving the hydraulic oil, the hydraulic cylinder 2 302 pushes the piston rod 303 on the hydraulic cylinder 2 302 to move, and pushes the fixed bracket 206 to move through the docking plate 306 connected to the piston rod 303. This causes the rotating friction disc 207 to separate from the feeding auger 102, thus preventing plastic from being squeezed out after the moving mold 107 separates from the fixed mold 104.

[0043] In this embodiment, the displacement of the moving mold 107 and the separation of the rotating friction disk 207 are synchronized through hydraulic transmission. When the moving mold 107 separates from the fixed mold 104, the rotating friction disk 207 immediately disengages from the feeding auger 102, stopping the transmission of material supply power. This completely avoids problems such as excess material overflow and flash caused by the feeding auger 102 continuing to push plastic after mold separation, ensuring that the injection molded product has a regular shape and reducing waste generation.

[0044] In practical use, the device uses the base 101 as a supporting foundation. The plastic granules in the cylinder 103 are conveyed by the feeding auger 102. The heating element on the feeding auger 102 melts the plastic granules into fluid plastic, preparing for injection molding. At the same time, the drive motor 202 in the fixed frame 201 of the power output structure 2 starts, driving the drive shaft 203 and the fixed block 204 to rotate. In the initial state, the rotating friction disk 207 abuts against the rotating shaft of the feeding auger 102 under the support of the telescopic spring 210. The fixed block 204 pushes the rotating friction disk 207 to rotate through the telescopic block 208 (with the return spring 209 providing support force). With the help of friction, the feeding auger 102 rotates synchronously, realizing the continuous conveying of fluid plastic.

[0045] The electric telescopic rod 106 is activated, pushing the moving mold 107 towards the fixed mold 104. The buffer 108 buffers the instantaneous thrust of mold closing, ensuring that the moving mold 107 and the fixed mold 104 fit precisely to form a cavity. The feeding auger 102 continuously delivers the fluid plastic into the cavity until the cavity is filled. At this time, the feeding auger 102 can no longer rotate, and the friction between it and the rotating friction disk 207 increases. The fixed block 204 overcomes the supporting force of the return spring 209 through the inclined structure of the telescopic block 208, pushing the telescopic block 208 into the rotating friction disk 207. The drive motor 202 continues to run and enters the standby feeding state to avoid the formation of cavities after the fluid plastic cools and shrinks.

[0046] After the fluid plastic is formed in the cavity, the electric telescopic rod 106 retracts, causing the moving mold 107 to reset. When the moving mold 107 moves, the hydraulic oil in the first hydraulic cylinder 301 is transported to the second hydraulic cylinder 302 through the delivery pipe 305 via the piston rod 303. The second hydraulic cylinder 302 pushes the piston rod 303 and the docking plate 306 to move, thereby causing the second fixed bracket 206 and the rotating friction disk 207 to move synchronously, so that the rotating friction disk 207 is completely separated from the feeding auger 102, stopping the power transmission of material supply and preventing residual material from overflowing during mold separation. After demolding, the device resets and enters the next injection molding cycle. When it is necessary to adjust the discharge speed during injection, only the rotation speed of the servo motor 202 needs to be adjusted. The above is the overall workflow of the present invention. This step can be repeated for the next use. The actual operation process is very simple and easy.

[0047] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0048] Although embodiments of the 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 invention, the scope of which is defined by the appended claims and their equivalents.

[0049] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the invention, such designs should fall within the protection scope of the present invention.

Claims

1. A plastic injection molding apparatus with controllable fluid plastic discharge speed, characterized in that: It includes an injection molding structure (1), a power output structure (2), and an adaptive displacement component (3). The injection molding structure (1), the power output structure (2), and the adaptive displacement component (3) are all assembled on the same bearing base. The power output structure (2) and the injection molding structure (1) are driven together to provide feeding power. The adaptive displacement component (3) is linked with the injection molding structure (1) and the power output structure (2) respectively, and is used to control the transmission on and off of the power output structure (2) and the injection molding structure (1).

2. The plastic injection molding apparatus with controllable fluid plastic discharge speed according to claim 1, characterized in that: The injection molding structure (1) includes a base (101), a feeding auger (102), a barrel (103), a fixed mold (104), a mounting plate (105), an electric telescopic rod (106), a moving mold (107), and a buffer (108). The base (101) is the overall load-bearing foundation. The feeding auger (102), barrel (103), fixed mold (104), and mounting plate (105) are all fixedly installed on the upper surface of the base (101). The discharge port of the barrel (103) passes through and is fixedly connected to the feeding auger (102). Heating elements are evenly arranged on the feeding auger (102). The electric telescopic rod (106) is fixedly installed on the mounting plate (105). The moving mold (107) is fixedly connected to the output end of the electric telescopic rod (106) and is adapted to the fixed mold (104) to form a cavity. The buffer (108) is located between the mounting plate (105) and the moving mold (107).

3. The plastic injection molding apparatus with controllable fluid plastic discharge speed according to claim 2, characterized in that: The power output structure (2) includes a fixed frame (201), a drive motor (202), a drive shaft (203), a fixed block (204), a first fixed bracket (205), a second fixed bracket (206), a rotating friction disc (207), a telescopic block (208), a return spring (209), and a telescopic spring (210); the fixed frame (201) is fixedly installed on the upper surface of the placement base (101), the drive motor (202) is fixed inside the fixed frame (201), and the drive shaft (203) is fixed. Connected to the output end of the drive motor (202); the fixed blocks (204) are evenly distributed and fixedly connected to the end of the drive shaft (203) away from the drive motor (202); the first fixed bracket (205) and the second fixed bracket (206) are slidably connected to the upper surface of the placement base (101) and located inside the fixed frame (201); the rotating friction disk (207) is rotatably connected between the first fixed bracket (205) and the second fixed bracket (206), and can be detachably abutted against the rotating shaft of the feeding auger (102).

4. The plastic injection molding apparatus with controllable fluid plastic discharge speed according to claim 3, characterized in that: The telescopic blocks (208) are evenly distributed and slidably connected to the inner surface of the rotating friction disk (207). The return spring (209) is located between the telescopic blocks (208) and the rotating friction disk (207), and its two ends are fixedly connected to the telescopic blocks (208) and the rotating friction disk (207) respectively. The side of the telescopic block (208) near the drive shaft (203) is set as an inclined surface and is adapted to the fixed block (204). The telescopic spring (210) is located between the fixed bracket (205) and the fixed frame (201), and its two ends are fixedly connected to the fixed bracket (205) and the fixed frame (201) respectively.

5. A plastic injection molding apparatus with controllable fluid plastic discharge speed according to claim 4, characterized in that: The adaptive displacement component (3) includes a hydraulic cylinder 1 (301), a hydraulic cylinder 2 (302), a piston rod (303), a connecting spring (304), a conveying pipe (305), and a docking plate (306); the hydraulic cylinder 1 (301) and the hydraulic cylinder 2 (302) are both fixedly installed on the upper surface of the placement base (101), and the piston rod (303) is slidably connected to the hydraulic cylinder 1 (301) and the hydraulic cylinder 2 (302) respectively; one end of the connecting spring (304) is fixedly connected to the piston rod (303), and the other end is fixedly connected to the hydraulic cylinder 1 (301) or the hydraulic cylinder 2 (302); the two ends of the conveying pipe (305) pass through and are fixedly connected to the hydraulic cylinder 1 (301) and the hydraulic cylinder 2 (302) respectively.

6. A plastic injection molding apparatus with controllable fluid plastic discharge speed according to claim 5, characterized in that: The piston rod (303) on hydraulic cylinder one (301) is fixedly connected to the moving mold (107), and the piston rod (303) on hydraulic cylinder two (302) is fixedly connected to the fixed bracket two (206) through the docking plate (306); the docking plate (306) passes through and slides to connect the fixed frame (201).

7. A plastic injection molding apparatus with controllable fluid plastic discharge speed according to claim 6, characterized in that: The rotating friction disc (207) abuts against the rotating shaft of the feeding auger (102) under the elastic support of the telescopic spring (210). The fixed block (204) engages with the telescopic block (208) to drive the rotating friction disc (207) to rotate the feeding auger (102) through friction.

8. A plastic injection molding apparatus with controllable fluid plastic discharge speed according to claim 7, characterized in that: When the cavity of the injection molding structure (1) is filled, the feeding auger (102) stops rotating, and the fixed block (204) overcomes the elastic force of the return spring (209) through the inclined surface of the telescopic block (208), pushing the telescopic block (208) into the rotating friction disk (207), and driving the motor (202) to run continuously.

9. A plastic injection molding apparatus with controllable fluid plastic discharge speed according to claim 8, characterized in that: When the moving mold (107) moves away from the fixed mold (104), the hydraulic oil in the first hydraulic cylinder (301) flows into the second hydraulic cylinder (302) through the delivery pipe (305), pushing the piston rod (303) and the docking plate (306) of the second hydraulic cylinder (302) to move, thereby driving the second fixed bracket (206) and the rotating friction disk (207) to move synchronously, so that the rotating friction disk (207) separates from the feeding auger (102).

10. A plastic injection molding apparatus with controllable fluid plastic discharge speed according to claim 9, characterized in that: The electric telescopic rod (106) has adjustable output thrust and telescopic stroke, and the buffer (108) is an elastic buffer structure used to offset the instantaneous impact force when the electric telescopic rod (106) is pushed forward.

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