Modified plastic reinforced injection molding method and apparatus

Abstract

The application discloses a modified plastic reinforced injection molding method and device, and relates to the technical field of injection molding. The modified plastic reinforced injection molding method comprises the following steps: raw material hot melting and mixing, mold preheating, mold clamping and clamping, pressure boosting injection molding, pressure maintaining and shaping, cooling and solidifying, mold opening and discharging. The modified plastic reinforced injection molding method and device, through uniform fusion of glass fibers and molten plastics, greatly improve the mechanical strength, rigidity and deformation resistance of modified plastics. The pressure boosting injection molding cooperates with an exhaust structure to eliminate defects such as bubbles and material defects, and the product is compact and smooth. The pressure maintaining and precise temperature control cooling guarantee the size stability and reduce deformation. The worm gear and worm clamping block type clamping simplifies mold disassembly and improves mold changing efficiency. The discharging assembly linkage automatically ejects the product, reduces manual operation, and improves overall production efficiency and molding quality.

Description

Technical Field

[0001] This invention relates to the field of injection molding technology, and in particular to a modified plastic reinforced injection molding method and apparatus. Background Technology

[0002] Plastics are polymer materials synthesized from raw materials such as petroleum and natural gas. With their advantages of being lightweight, having moderate strength, being easy to process, having low cost, and being corrosion-resistant, they have been widely used in many fields, including daily life and industrial manufacturing. Injection molding is the mainstream process for plastic processing, which involves injecting melted plastic granules into a mold cavity, followed by cooling and solidification to obtain the molded product.

[0003] Current traditional injection molding technology has significant drawbacks: air bubbles are easily trapped when molten plastic fills the mold cavity, resulting in pitted surfaces and porous interiors, severely affecting appearance and performance; ordinary plastic products lack sufficient mechanical strength, and thin parts are more prone to deformation, making it difficult to meet the requirements of high load-bearing and high stability applications; furthermore, existing injection molding equipment often uses bolt-fixed molds, which are cumbersome to disassemble and reassemble, resulting in low replacement efficiency and failing to meet the needs of rapid mold change production, thus hindering the improvement of production efficiency and product quality. Therefore, this paper proposes an injection molding method and apparatus that can enhance plastic properties, improve molding quality, and facilitate mold replacement. Summary of the Invention

[0004] The purpose of this invention is to provide a modified plastic reinforced injection molding method and apparatus to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A modified plastic reinforced injection molding method includes the following steps: Step 1: Raw material hot melting and mixing: Add the modified plastic granules and glass fiber into the hot melting box according to the ratio, start the heating equipment to heat the raw materials to a molten state, and at the same time turn on the stirring equipment to continuously stir so that the raw materials are heated evenly, and the glass fiber and molten plastic are fully dispersed and fused to improve the reinforcing effect of the raw materials; Step 2, Mold Preheating: Start the mold preheating equipment to evenly heat the cavity and punch to the set temperature, avoiding rapid cooling of the molten plastic after injection, and ensuring injection flowability and molding quality; Step 3, Mold Closure and Clamping: The cavity mold and punch are moved by the guide rail to complete the mold closure. The clamping components are operated to accurately fix the mold to prevent the mold from shifting during the injection process and to ensure injection accuracy. Step 4, Pressure Injection: Open the feed pipe solenoid valve to inject the molten plastic mixed with glass fiber into the mold cavity. At the same time, start the pressure boosting component to pressurize the raw material, so that the molten plastic quickly fills the cavity and eliminates air bubbles and material shortage defects. Step 5, Pressure Holding and Shaping: Keep the mold closed and maintain internal pressure, allowing the molten plastic to fully adhere to the inner wall of the mold under pressure, compensating for cooling shrinkage, and ensuring that the product has a dense structure and stable dimensions; Step 6, Cooling and Curing: Start the cooling equipment to circulate and cool the mold, so that the modified plastic in the cavity can be cooled and hardened quickly, completing the product shaping. Control the cooling rate to avoid product deformation. Step 7, Mold Opening and Unloading: Move the punch to open the mold, start the unloading assembly to eject the molded product from the mold, collect the product through the unloading port, and complete the entire injection molding process.

[0006] A modified plastic reinforced injection molding apparatus includes a worktable, a guide rail, a housing, a fixing plate, and a positioning frame fixedly mounted on the top of the worktable. A concave mold and a convex mold are slidably mounted on the top of the guide rail. A heat preservation box is fixedly mounted on the top of the housing, with a feed inlet on the top of the heat preservation box. A heating plate is fixedly mounted on the inner wall of the heat preservation box. A first feed pipe is fixedly mounted on one side of the heat preservation box, and a second feed pipe is fixedly connected to the first feed pipe. A second electric push rod is fixedly mounted on the fixing plate. The apparatus also includes a clamping assembly mounted on the housing and the second electric push rod, used to clamp and fix the concave mold and the convex mold. A discharge assembly mounted on the worktable, the concave mold, and the convex mold, used to eject the molded workpiece from the concave mold and the convex mold through the cooperation of the second electric push rod and the discharge assembly. A stirring assembly mounted on the heat preservation box is used to stir and mix the raw materials. A pressurizing assembly mounted on the second feed pipe is used to pressurize the hot-melt raw materials entering the mold.

[0007] Preferably, the clamping assembly includes a bidirectional worm gear, a crank handle, a fixed shaft, a worm wheel, a hollow rod, a telescopic rod, a first locking block, and a second locking block. The bidirectional worm gear is rotatably mounted on the front and rear sides of the housing. The crank handle is fixedly mounted on one end of the bidirectional worm gear. The fixed shaft is fixedly mounted on the top and bottom of the housing. The worm wheel is rotatably mounted on the outer wall of the fixed shaft. The hollow rod is fixedly mounted on the outer wall of the worm wheel. The telescopic rod is slidably mounted on one end of the hollow rod. The first locking block is fixedly mounted on the outer wall of the hollow rod. The second locking block is fixedly mounted on the outer wall of the telescopic rod. Slots are provided on the front and rear sides of both the die and the punch. The first locking block and the second locking block are respectively engaged in the slots of the die and the punch. There are two sets of the fixed shaft, worm wheel, hollow rod, telescopic rod, first locking block, and second locking block, which are arranged symmetrically front and rear. This allows for quick engagement or disengagement of the locking blocks from the die slots, eliminating the traditional bolt fixing method, greatly simplifying the die assembly and disassembly steps, shortening the die change time, and adapting to the needs of rapid die change production.

[0008] Preferably, the discharge assembly includes a push rod, a first pusher frame, a second pusher frame, and push springs. The push rod is slidably installed on both sides of the housing, and one end of the push rod is fixedly installed with the free end of the second electric push rod. The first pusher frame is slidably installed on the die cavity, and the second pusher frame is slidably installed on the punch. There are four sets of push springs, which are fitted in pairs on the outer walls of the first pusher frame and the second pusher frame.

[0009] Preferably, the stirring assembly includes a motor and a stirring frame. The motor is fixedly installed on the top outer wall of the insulated box, and the stirring frame is rotatably installed on the top and bottom of the insulated box. The output shaft of the motor is fixedly installed on the top of the stirring frame. During the hot melting stage of the raw materials, glass fiber is added and mixed evenly with the stirring assembly, so that the glass fiber and the molten plastic are fully dispersed and fused, significantly improving the mechanical strength, rigidity and deformation resistance of the modified plastic. This allows thin products to meet the requirements of high load-bearing and high stability in application scenarios, breaking through the performance bottleneck of ordinary plastic products.

[0010] Preferably, the pressurizing assembly includes a first electric push rod and a piston. The first electric push rod is fixedly installed on the top of the second feed pipe, and the piston is slidably installed on the inner wall of the second feed pipe. The free end of the first electric push rod is fixedly installed with the top of the piston to pressurize the cavity in real time, avoid air being trapped during the filling process to form air bubbles, eliminate surface pits and internal loose defects of the product, and ensure that the product has a smooth appearance and a dense structure.

[0011] Preferably, an injection port and an exhaust port are provided between the die and the punch, one end of the second feed pipe extends into the injection port, an exhaust pipe is provided on the inner side of the exhaust port, a connecting rod is fixedly installed on the outer wall of the exhaust pipe, and one end of the connecting rod is fixedly installed on one side of the outer wall of the insulation box.

[0012] Preferably, one end of the telescopic rod is provided with a slot, and the free end of the second electric push rod is fixedly installed with a retaining ring, which is engaged in the slot.

[0013] Preferably, the worktable has a discharge port, the push rod is located inside the discharge port, and the discharge port is located below the die and the punch.

[0014] Preferably, both the first feed pipe and the exhaust pipe are equipped with solenoid valves, and a control panel is fixedly installed on one side of the worktable.

[0015] Compared with the prior art, the beneficial effects of the present invention are: This modified plastic reinforced injection molding method and apparatus, by adding glass fiber during the hot melting stage of the raw material and mixing it evenly with a stirring component, allows the glass fiber to be fully dispersed and fused with the molten plastic, significantly improving the mechanical strength, rigidity and deformation resistance of the modified plastic, enabling thin products to meet the requirements of high load-bearing and high stability applications, and breaking through the performance bottleneck of ordinary plastic products; The pressurized injection molding and the venting structure work together to pressurize the molten plastic in real time when it is injected into the cavity, and the venting pipe quickly removes the air in the cavity, avoiding the formation of air bubbles during the filling process, eliminating surface pits and internal looseness defects, and ensuring that the product has a smooth appearance and a dense structure. The pressure holding and shaping process continuously maintains the internal pressure of the mold, effectively compensating for the cooling shrinkage of the plastic, ensuring the dimensional accuracy and stability of the product, reducing the defect rate, and the cooling equipment precisely controls the temperature of the mold circulation to control the cooling rate to avoid product warping and deformation, further improving the molding quality. The device uses a clamping assembly combining a worm gear and a clamping block. By turning the handle, the clamping block can be quickly engaged or disengaged from the mold slot, eliminating the traditional bolt fixing method, greatly simplifying the mold assembly and disassembly steps, shortening the mold change time, and adapting to the needs of rapid mold change production. The discharge assembly is linked with the electric push rod, automatically ejecting the molded product when the mold is opened, realizing automated discharge, reducing manual operation, and improving overall production efficiency. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a parting diagram of the present invention; Figure 3 This is a demolding diagram of the present invention; Figure 4 This is a schematic diagram of the structure of the workbench of the present invention; Figure 5 This is a cross-sectional view of the casing of the present invention; Figure 6 This is a cross-sectional view of the insulated box and the second feed pipe of the present invention; Figure 7 This is a cross-sectional view of the die and punch of the present invention.

[0017] Reference numerals: 1. Workbench; 2. Guide rail; 3. Die; 4. Punch; 5. Machine box; 6. Insulation box; 7. Feed inlet; 8. Heating plate; 9. First feed pipe; 10. Second feed pipe; 11. Motor; 12. Stirring rack; 13. First electric push rod; 14. Piston; 15. Exhaust pipe; 16. Connecting rod; 17. Solenoid valve; 18. Bidirectional worm gear; 19. Handle; 20. Fixed shaft; 21. Worm gear; 22. Hollow rod; 23. Telescopic rod; 24. First locking block; 25. Second locking block; 26. Fixed plate; 27. Second electric push rod; 28. Snap ring; 29. ​​Snap groove; 30. Push rod; 31. First pusher frame; 32. Second pusher frame; 33. Push spring; 34. Control panel; 35. Positioning frame. Detailed Implementation

[0018] This section will describe in detail specific embodiments of the present invention. Preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and overall technical solution of the present invention, but they should not be construed as limiting the scope of protection of the present invention.

[0019] Please see Figure 1-7 This invention provides a technical solution: a modified plastic reinforced injection molding method, comprising the following steps: Step 1: Raw material hot melting and mixing: Add the modified plastic granules and glass fiber into the hot melting box according to the ratio, start the heating equipment to heat the raw materials to a molten state, and at the same time turn on the stirring equipment to continuously stir so that the raw materials are heated evenly, and the glass fiber and molten plastic are fully dispersed and fused to improve the reinforcing effect of the raw materials; Step 2, Mold Preheating: Start the mold preheating equipment to evenly heat the cavity and punch to the set temperature, avoiding rapid cooling of the molten plastic after injection, and ensuring injection flowability and molding quality; Step 3, Mold Closure and Clamping: The cavity mold and punch are moved by the guide rail to complete the mold closure. The clamping components are operated to accurately fix the mold to prevent the mold from shifting during the injection process and to ensure injection accuracy. Step 4, Pressure Injection: Open the feed pipe solenoid valve to inject the molten plastic mixed with glass fiber into the mold cavity. At the same time, start the pressure boosting component to pressurize the raw material, so that the molten plastic quickly fills the cavity and eliminates air bubbles and material shortage defects. Step 5, Pressure Holding and Shaping: Keep the mold closed and maintain internal pressure, allowing the molten plastic to fully adhere to the inner wall of the mold under pressure, compensating for cooling shrinkage, and ensuring that the product has a dense structure and stable dimensions; Step 6, Cooling and Curing: Start the cooling equipment to circulate and cool the mold, so that the modified plastic in the cavity can be cooled and hardened quickly, completing the product shaping. Control the cooling rate to avoid product deformation. Step 7, Mold Opening and Unloading: Move the punch to open the mold, start the unloading assembly to eject the molded product from the mold, collect the product through the unloading port, and complete the entire injection molding process.

[0020] A modified plastic reinforced injection molding apparatus includes a worktable 1. A guide rail 2, a housing 5, a fixing plate 26, and a positioning frame 35 are fixedly mounted on the top of the worktable 1. A concave mold 3 and a convex mold 4 are slidably mounted on the top of the guide rail 2. A heat preservation box 6 is fixedly mounted on the top of the housing 5. A feed inlet 7 is opened on the top of the heat preservation box 6. A heating plate 8 is fixedly mounted on the inner wall of the heat preservation box 6. A first feed pipe 9 is fixedly mounted on one side of the heat preservation box 6. A second feed pipe 10 is fixedly connected to the first feed pipe 9. A second electric motor is fixedly mounted on the fixing plate 26. The push rod 27 also includes a clamping assembly installed on the housing 5 and the second electric push rod 27. The clamping assembly is used to clamp and fix the die 3 and the punch 4. The discharge assembly installed on the worktable 1, the die 3 and the punch 4 is used to eject the molded workpiece from the die 3 and the punch 4 through the cooperation of the second electric push rod 27 and the discharge assembly. The stirring assembly installed on the heat preservation box 6 is used to stir and mix the raw materials. The pressurizing assembly installed on the second feed pipe 10 is used to pressurize the hot melt raw materials entering the mold.

[0021] Furthermore, the clamping assembly includes a bidirectional worm gear 18, a crank handle 19, a fixed shaft 20, a worm wheel 21, a hollow rod 22, a telescopic rod 23, a first locking block 24, and a second locking block 25. The bidirectional worm gear 18 is rotatably mounted on the front and rear sides of the housing 5. The crank handle 19 is fixedly mounted on one end of the bidirectional worm gear 18. The fixed shaft 20 is fixedly mounted on the top and bottom of the housing 5. The worm wheel 21 is rotatably mounted on the outer wall of the fixed shaft 20. The hollow rod 22 is fixedly mounted on the outer wall of the worm wheel 21. The telescopic rod 23 is slidably mounted on one end of the hollow rod 22. The first locking block 24 is fixedly mounted on the outer wall of the hollow rod 22. The second locking block 25 is fixedly mounted on the outer wall of the worm wheel 22. The outer wall of the telescopic rod 23, and the front and rear sides of the die 3 and the punch 4 are provided with slots. The first locking block 24 and the second locking block 25 are respectively locked into the slots of the die 3 and the punch 4. There are two sets of the fixed shaft 20, worm gear 21, hollow rod 22, telescopic rod 23, first locking block 24 and second locking block 25, which are arranged symmetrically in front and behind. The locking blocks can be quickly locked or disengaged from the mold slots, eliminating the traditional bolt fixing method, greatly simplifying the mold assembly and disassembly steps, shortening the mold change time, and adapting to the needs of rapid mold change production. The self-locking characteristics of the worm gear can prevent the mold from loosening under force during injection molding, and improve the mold closing stability and injection accuracy.

[0022] Furthermore, the ejection assembly includes a push rod 30, a first ejector frame 31, a second ejector frame 32, and a push spring 33. The push rod 30 is slidably mounted on both sides of the housing 5, and one end of the push rod 30 is fixedly mounted to the free end of the second electric push rod 27. The first ejector frame 31 is slidably mounted on the cavity mold 3, and the second ejector frame 32 is slidably mounted on the punch mold 4. There are four sets of push springs 33, which are set in pairs on the outer wall of the first ejector frame 31 and the outer wall of the second ejector frame 32. The push springs can drive the ejector frame to automatically reset after ejection, so as to avoid affecting the next mold closing and injection molding, and realize the automated cycle of ejection and reset.

[0023] Furthermore, the stirring assembly includes a motor 11 and a stirring frame 12. The motor 11 is fixedly installed on the top outer wall of the insulation box 6, and the stirring frame 12 is rotatably installed on the top and bottom of the insulation box 6. The output shaft of the motor 11 is fixedly installed on the top of the stirring frame 12. During the hot melting stage of the raw materials, glass fiber is added and mixed evenly with the stirring assembly, so that the glass fiber and the molten plastic are fully dispersed and fused, significantly improving the mechanical strength, rigidity and deformation resistance of the modified plastic. This allows thin products to meet the requirements of high load-bearing and high stability applications, breaking through the performance bottleneck of ordinary plastic products. Continuous stirring can prevent the glass fiber from settling and stratifying, ensuring that the reinforcement effect of the raw materials is uniform throughout.

[0024] Furthermore, the pressurizing component includes a first electric push rod 13 and a piston 14. The first electric push rod 13 is fixedly installed on the top of the second feed pipe 10, and the piston 14 is slidably installed on the inner wall of the second feed pipe 10. The free end of the first electric push rod 13 is fixedly installed with the top of the piston 14 to pressurize the cavity in real time, avoid air from being trapped during the filling process and forming air bubbles, eliminate surface pits and internal loose defects of the product, and ensure that the product has a smooth appearance and a dense structure. The piston pressurization can accurately control the injection pressure and filling speed, and adapt to the injection molding needs of different flowability modified plastics.

[0025] Furthermore, an injection port and an vent are provided between the die 3 and the punch 4. One end of the second feed pipe 10 extends into the injection port. An vent pipe 15 is provided inside the vent. A connecting rod 16 is fixedly installed on the outer wall of the vent pipe 15. One end of the connecting rod 16 is fixedly installed on one side of the outer wall of the insulation box 6. The vent pipe and the pressurization component work together to quickly discharge the air in the cavity and avoid molding defects such as bubbles, material shortage, and scorching caused by gas entrapment.

[0026] Furthermore, a slot 29 is provided at one end of the telescopic rod 23, and a retaining ring 28 is fixedly installed at the free end of the second electric push rod 27. The retaining ring 28 is engaged in the slot 29. The movable engagement structure of the retaining ring and the slot can realize the linkage between the mold opening action and the clamping and unlocking, without affecting the normal movement and disassembly of the mold.

[0027] Furthermore, the worktable 1 is provided with a discharge port, the push rod 30 is located inside the discharge port, and the discharge port is located below the die 3 and the punch 4. The discharge port is centrally located to ensure that the product falls smoothly and is collected after being ejected, avoiding bumps and scratches, and improving the finished product qualification rate.

[0028] Furthermore, both the first feed pipe 9 and the exhaust pipe 15 are equipped with solenoid valves 17, and a control panel 34 is fixedly installed on one side of the workbench 1. The solenoid valves can be automatically controlled in sequence through the control panel, and can be precisely switched on and off in conjunction with the pressurization, pressure holding and cooling processes to improve the automation and intelligence level of the entire injection molding process.

[0029] Furthermore, the cooling equipment adopts a linkage structure of built-in circulating channels in the mold and external constant temperature cooling unit. The circulating channels are evenly distributed around the cavities of the concave mold 3 and the convex mold 4. The inner walls of the channels are polished to prevent scaling, ensuring smooth flow of coolant without blockage or dead corners. The cooling equipment can precisely control the cooling water temperature and circulation flow rate to achieve segmented gradient cooling: after injection molding, medium-speed cooling is used first to stabilize the internal structure of the product, then rapid cooling is switched to shorten the curing cycle, and finally low-speed constant temperature cooling is used to eliminate internal stress, effectively avoiding deformation problems such as warping, shrinkage marks, and cracking of the product. The cooling equipment is connected to the control panel 34 via signal, supporting automated timing control. It can automatically match cooling parameters according to the modified plastic material and product thickness to ensure cooling uniformity and molding stability, and improve the dimensional accuracy and appearance quality of the product.

[0030] Working principle: Modified plastic granules and glass fiber are fed into the heat preservation box 6 through the feed inlet 7. The heating plate 8 heats the raw materials to a molten state. The motor 11 drives the stirring rack 12 to continuously stir, so that the glass fiber and molten plastic are evenly fused, completing the pretreatment of the raw material reinforcement. The concave mold 3 and convex mold 4 are preheated to the set temperature and move along the guide rail 2 to close the mold. Turning the handle 19 drives the bidirectional worm gear 18 and worm wheel 21 to drive the first locking block 24 and the second locking block 25 on the hollow rod 22 and the telescopic rod 23 into the mold slot, completing the precise clamping and fixing. The solenoid valve 17 is opened, and the molten raw material is injected into the mold cavity through the first feed pipe 9 and the second feed pipe 10. The first electric push rod 13 drives the piston. 14. Downward pressure is increased, and air in the cavity is discharged in conjunction with exhaust pipe 15. During the pressure holding stage, pressure is maintained to compensate for the cooling and shrinkage of the raw material and ensure the product is dense. The mold is cooled by circulation through the cooling equipment, and the modified plastic inside the cavity cools and hardens rapidly, completing the product shaping. The second electric push rod 27 drives the retaining ring 28 and the telescopic rod 23 to move the punch 4 to open the mold. At the same time, the push rod 30 pushes the first pusher 31 and the second pusher 32. With the cooperation of the push spring 33, the molded product is ejected from the cavity 3 and the punch 4. The product is collected through the worktable outlet. The reverse crank 19 makes the first retaining block 24 and the second retaining block 25 disengage from the mold slot, so that the cavity 3 and the punch 4 can be quickly disassembled and replaced.

[0031] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A method for injection molding modified plastic reinforcement, characterized in that, Includes the following steps: Step 1: Raw material hot melting and mixing: Add the modified plastic granules and glass fiber into the hot melting box according to the ratio, start the heating equipment to heat the raw materials to a molten state, and at the same time turn on the stirring equipment to continuously stir so that the raw materials are heated evenly, and the glass fiber and molten plastic are fully dispersed and fused to improve the reinforcing effect of the raw materials; Step 2, Mold Preheating: Start the mold preheating equipment to evenly heat the cavity and punch to the set temperature, avoiding rapid cooling of the molten plastic after injection, and ensuring injection flowability and molding quality; Step 3, Mold Closure and Clamping: The cavity mold and punch are moved by the guide rail to complete the mold closure. The clamping components are operated to accurately fix the mold to prevent the mold from shifting during the injection process and to ensure injection accuracy. Step 4, Pressure Injection: Open the feed pipe solenoid valve to inject the molten plastic mixed with glass fiber into the mold cavity. At the same time, start the pressure boosting component to pressurize the raw material, so that the molten plastic quickly fills the cavity and eliminates air bubbles and material shortage defects. Step 5, Pressure Holding and Shaping: Keep the mold closed and maintain internal pressure, allowing the molten plastic to fully adhere to the inner wall of the mold under pressure, compensating for cooling shrinkage, and ensuring that the product has a dense structure and stable dimensions; Step 6, Cooling and Curing: Start the cooling equipment to circulate and cool the mold, so that the modified plastic in the cavity can be cooled and hardened quickly, completing the product shaping. Control the cooling rate to avoid product deformation. Step 7, Mold Opening and Unloading: Move the punch to open the mold, start the unloading assembly to eject the molded product from the mold, collect the product through the unloading port, and complete the entire injection molding process.

2. A modified plastic reinforced injection molding device, comprising a worktable (1), a guide rail (2), a machine box (5), a fixing plate (26), and a positioning frame (35) fixedly installed on the top of the worktable (1), a concave mold (3) and a convex mold (4) slidably installed on the top of the guide rail (2), a heat preservation box (6) fixedly installed on the top of the machine box (5), a feed inlet (7) opened on the top of the heat preservation box (6), a heating plate (8) fixedly installed on the inner wall of the heat preservation box (6), a first feed pipe (9) fixedly installed on one side of the heat preservation box (6), a second feed pipe (10) fixedly connected to the first feed pipe (9), and a second electric push rod (27) fixedly installed on the fixing plate (26), characterized in that, Also includes: The clamping assembly is installed on the housing (5) and the second electric push rod (27). The clamping assembly is used to clamp and fix the die (3) and the punch (4). The ejection assembly installed on the worktable (1), the die (3), and the punch (4) is used to eject the formed workpiece from the die (3) and the punch (4) through the cooperation of the second electric push rod (27) and the ejection assembly. The stirring assembly installed on the insulated box (6) is used to stir and mix the raw materials; A pressurizing assembly is installed on the second feed pipe (10) to pressurize the hot melt material entering the mold.

3. The modified plastic reinforced injection molding apparatus according to claim 2, characterized in that: The clamping assembly includes a bidirectional worm gear (18), a crank handle (19), a fixed shaft (20), a worm wheel (21), a hollow rod (22), a telescopic rod (23), a first locking block (24), and a second locking block (25). The bidirectional worm gear (18) is rotatably mounted on the front and rear sides of the housing (5). The crank handle (19) is fixedly mounted on one end of the bidirectional worm gear (18). The fixed shaft (20) is fixedly mounted on the top and bottom of the housing (5). The worm wheel (21) is rotatably mounted on the outer wall of the fixed shaft (20). The hollow rod (22) is fixedly mounted on the outer wall of the worm wheel (21). The telescopic rod... (23) Slidingly installed on one end of the hollow rod (22), the first locking block (24) is fixedly installed on the outer wall of the hollow rod (22), and the second locking block (25) is fixedly installed on the outer wall of the telescopic rod (23). The front and rear sides of the die (3) and the punch (4) are provided with slots. The first locking block (24) and the second locking block (25) are respectively locked in the slots of the die (3) and the punch (4). The fixed shaft (20), the worm gear (21), the hollow rod (22), the telescopic rod (23), the first locking block (24), and the second locking block (25) are all in two sets and are arranged symmetrically in front and behind.

4. The modified plastic reinforced injection molding apparatus according to claim 3, characterized in that: The discharge assembly includes a push rod (30), a first pusher frame (31), a second pusher frame (32), and a push spring (33). The push rod (30) is slidably installed on both sides of the housing (5). One end of the push rod (30) is fixedly installed with the free end of the second electric push rod (27). The first pusher frame (31) is slidably installed on the die (3), and the second pusher frame (32) is slidably installed on the punch (4). There are four sets of push springs (33), which are set in pairs on the outer wall of the first pusher frame (31) and the outer wall of the second pusher frame (32).

5. The modified plastic reinforced injection molding apparatus according to claim 4, characterized in that: The stirring assembly includes a motor (11) and a stirring frame (12). The motor (11) is fixedly installed on the top outer wall of the insulation box (6), and the stirring frame (12) is rotatably installed on the top and bottom of the insulation box (6). The output shaft of the motor (11) is fixedly installed on the top of the stirring frame (12).

6. The modified plastic reinforced injection molding apparatus according to claim 5, characterized in that: The pressurization assembly includes a first electric push rod (13) and a piston (14). The first electric push rod (13) is fixedly installed on the top of the second feed pipe (10), and the piston (14) is slidably installed on the inner wall of the second feed pipe (10). The free end of the first electric push rod (13) is fixedly installed on the top of the piston (14).

7. The modified plastic reinforced injection molding apparatus according to claim 6, characterized in that: An injection port and an exhaust port are provided between the concave mold (3) and the convex mold (4). One end of the second feed pipe (10) extends into the injection port. An exhaust pipe (15) is provided on the inner side of the exhaust port. A connecting rod (16) is fixedly installed on the outer wall of the exhaust pipe (15). One end of the connecting rod (16) is fixedly installed on one side of the outer wall of the heat preservation box (6).

8. The modified plastic reinforced injection molding apparatus according to claim 7, characterized in that: One end of the telescopic rod (23) is provided with a slot (29), and the free end of the second electric push rod (27) is fixedly installed with a retaining ring (28), which is engaged in the slot (29).

9. The modified plastic reinforced injection molding apparatus according to claim 8, characterized in that: The workbench (1) has a discharge port, the push rod (30) is located inside the discharge port, and the discharge port is located below the die (3) and the punch (4).

10. The modified plastic reinforced injection molding apparatus according to claim 9, characterized in that: The first feed pipe (9) and the exhaust pipe (15) are both equipped with solenoid valves (17), and a control panel (34) is fixedly installed on one side of the workbench (1).

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