Plastic injection molding machine with cooling mechanism

Abstract

The invention relates to the technical field of plastic molding machines, and discloses a plastic injection molding machine with a cooling mechanism, the plastic injection molding machine comprises a base, the top of the base is fixedly provided with a melting box and an injection machine, and one side of the base is provided with a discharging plate; the cooling device is located on one side of the base, the cooling device comprises a cooling box arranged on one side of the base, a plurality of connecting plates are fixed between the cooling box and the base, the outer wall of the cooling box is connected with a water injection pipe and a water drainage pipe, and a heat conduction pipe is arranged in the base; the cooling device adopts a reasonable design, a cooling box conveys cooling liquid to a heat conduction pipe through a circulating pump, through mutual cooperation of a water suction pump, a control valve, a one-way valve, a valve body and an opening and closing valve, after cooling operation is completed, cooling water in the heat conduction pipe can be pumped out through the water suction pump, cooling water residues are avoided, and the cooling efficiency is improved. And the die can smoothly carry out next cycle operation, the service life of the die is prolonged, and the operation efficiency of the die is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of plastic molding machines, and particularly to a plastic injection molding machine with a cooling mechanism. Background Art

[0002] Plastic injection molding machines emerged at the end of the 19th century. When plastic materials such as celluloid appeared, the early injection molding machines had simple structures and low production efficiency. With the development of the plastic industry, thermoplastic plastics were widely used, and the technology of injection molding machines was continuously innovated. The advent of screw-type injection molding machines solved problems such as uneven plasticization.

[0003] In the plastic processing industry, plastic injection molding machines are commonly used equipment that can process plastic raw materials into plastic products of various required shapes. However, there are some deficiencies in the actual use of existing plastic injection molding machines. In terms of feeding, the traditional feeding mechanism of molding machines lacks an effective filtering device, and impurities in plastic raw materials easily enter the melting tank, thereby affecting the quality of plastic products. Moreover, the raw materials may accumulate and block during the feeding process, resulting in unsmooth feeding and reduced production efficiency. The cooling link is a shortcoming of existing molding machines. The cooling systems of some molding machines are not reasonably designed, and the cooling effect is not good, resulting in too long cooling time for plastic products, extending the production cycle, the circulation of coolant is not efficient enough, and the energy consumption is large, increasing the production cost. Moreover, cooling water is easily left inside the heat conduction tube, seriously affecting the cyclic operation of the mold. Summary of the Invention

[0004] The purpose of the present invention is to provide a plastic injection molding machine with a cooling mechanism, which solves the problems in the background art of lacking an effective filtering device in feeding, large energy consumption in the cooling link, increasing production costs, and cooling water being easily left inside the heat conduction tube.

[0005] To solve the above technical problems, the present invention provides the following technical solutions:

[0006] A plastic injection molding machine with a cooling mechanism, comprising:

[0007] A base, on the top of which a melting tank and an injection machine are fixed, and a discharge plate is installed on one side of the base;

[0008] A feeding mechanism, which is located on one side of the top of the base and is used to add plastic raw materials into the melting tank;

[0009] A mold clamping mechanism, which is located on the top of the base and is used to mold the plastic;

[0010] Cooling device, the cooling device is located on one side of the base and is used to cool the mold clamping mechanism. The cooling device includes a cooling box arranged on one side of the base. A plurality of connecting plates are fixed between the cooling box and the base, and a water injection pipe and a drain pipe are connected to the outer wall of the cooling box. A heat conduction pipe is arranged inside the base. One side of the cooling box is fixedly connected with a condenser. One end of the heat conduction pipe is connected with a return pipe, and the return pipe is connected with the condenser. A circulating pump is fixed inside the cooling box, and the water outlet end of the circulating pump is connected with a water supply pipe, and the water supply pipe is connected with the water inlet end of the heat conduction pipe.

[0011] Preferably, a water extraction pipe is connected to the bottom of the return pipe, and a water extraction pump is further arranged inside the cooling box. The water inlet end of the water extraction pump is connected with the water extraction pipe.

[0012] Preferably, an air inlet pipe is connected to the top of the water supply pipe, a control valve is arranged inside the water extraction pipe, an opening and closing valve is arranged inside the air inlet pipe, a check valve is arranged inside the water supply pipe, and a valve body is arranged inside the return pipe.

[0013] Preferably, the mold clamping mechanism includes a frame fixed on the top of the base and a lower mold installed at the bottom of the frame. An upper mold corresponding to the lower mold is further arranged inside the frame. A cylinder is fixed on the top of the frame, and the output end of the cylinder is connected with the upper mold. A limiting component for limiting the upper mold is arranged between the upper mold and the frame.

[0014] Preferably, the limiting component includes a plurality of fixed grooves opened on both sides of the frame. Fixed rods are fixedly installed inside the plurality of fixed grooves. Sliders are sleeved on the outer walls of the plurality of fixed rods. Every two sliders extend to one side of the frame and are jointly fixed with a linkage plate. A positioning component for positioning the sliders is arranged on one side of the frame.

[0015] Preferably, the positioning component includes a fixing plate fixedly installed on one side of the frame. Two extension frames are fixedly installed on one side of the fixing plate. Second electric push rods are fixedly installed on one side of the two extension frames. The telescopic end of the second electric push rod is connected with a positioning plate. A positioning groove is opened on one side of the frame, and the positioning groove penetrates through the fixed groove. The positioning plate is inserted into the positioning groove, and an opening groove matched with the fixed rod is opened inside the positioning plate.

[0016] Preferably, the feeding mechanism includes a diversion box fixed on one side of the top of the base. A filtering box is fixed on the top of the diversion box. A feeding box is installed on the top of the filtering box. A rotating shaft is rotatably installed inside the feeding box. A plurality of uniformly distributed rotating blades are fixedly installed on the outer wall of the rotating shaft. A feeding pipe is connected between the diversion box and the melting box.

[0017] Preferably, guide blocks are fixedly installed on both sides inside the filtering box. A filter plate is installed between the two guide blocks. One side of the top of the filter plate is provided with a push plate which is inclined. One side of the filtering box is fixedly installed with a first electric push rod, and the telescopic end of the first electric push rod extends into the filtering box and is connected to the push plate.

[0018] Preferably, a discharge port is formed on one side of the filtering box. A closing plate is installed inside the discharge port. Two clamping plates are fixed on both sides of the closing plate. The clamping plates and the filtering box are fixed by bolts. A dismounting and assembling plate is fixedly installed at the bottom of the feeding box. A plurality of uniformly distributed screw rods are fixed on the top of the filtering box. Disassembling holes into which the plurality of screw rods are inserted are formed inside the dismounting and assembling plate, and nuts screwed onto the screw rods are arranged on the top of the dismounting and assembling plate.

[0019] Preferably, a connecting pipe is connected to the bottom of the melting box. A feeding pump is fixed inside the base. The feeding end of the feeding pump is connected to the connecting pipe, and the discharging end of the feeding pump is connected to a liquid infusion pipe. The liquid infusion pipe is connected to an injection machine. An injection pipe is connected to one side of the injection machine and corresponds to the lower mold. A U-shaped pipe is connected to the bottom of one side of the injection machine. A reinforcing sleeve for reinforcing the U-shaped pipe is installed between the U-shaped pipe and the injection machine.

[0020] Compared with the prior art, the beneficial effects achieved by the present invention are as follows:

[0021] 1. The cooling device of the present invention adopts a reasonable design. The cooling box conveys the coolant to the heat conduction pipe through the circulating pump to efficiently cool the die clamping mechanism. After absorbing heat, the coolant flows back to the condenser through the return pipe for cooling, forming an efficient circulating system, which greatly shortens the cooling time of plastic products, effectively shortens the production cycle, improves the production efficiency, and the efficient circulating design reduces energy consumption. At the same time, through the mutual cooperation of the water pump, control valve, one-way valve, valve body and opening and closing valve, when the cooling operation is completed, the cooling water in the heat conduction pipe can be pumped out by the water pump to avoid the residue of cooling water, ensuring that the mold can smoothly carry out the next cycle operation, and improving the service life and operation efficiency of the mold;

[0022] 2. A filter plate is installed inside the filter box, which can effectively intercept various impurities in the plastic raw materials, ensuring that only pure raw materials enter the melting box, guaranteeing the quality of the plastic raw materials, significantly improving the molding quality of plastic products, reducing the defective rate, making the produced plastic products more in line with the quality standards. A rotating shaft and rotating blades are arranged in the feeding box. During the feeding process of the raw materials, the rotating shaft drives the rotating blades to continuously stir, effectively avoiding the problems of raw material accumulation and blockage, enabling the raw materials to enter the melting box evenly and smoothly, greatly improving the feeding efficiency, thereby enhancing the production efficiency of the entire molding machine and reducing the production stagnation time caused by unsmooth feeding.

[0023] 3. Through the mutual cooperation of the clamping plate and the bolt, the impurities filtered out can be easily discharged by driving the push plate through the first electric push rod. Moreover, the feeding box and the filter box adopt a detachable connection method, which is convenient for regular cleaning and maintenance of the filter box and the feeding box, ensuring the long-term stable operation of the feeding mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic structural diagram of the whole invention;

[0025] Figure 2 is a side view of the whole invention;

[0026] Figure 3 is a schematic structural diagram of the cooling device and the mold clamping mechanism of the invention;

[0027] Figure 4 is a schematic structural diagram of the cooling device when disassembled;

[0028] Figure 5 is a schematic structural diagram of the mold clamping mechanism when disassembled;

[0029] Figure 6 is a schematic structural diagram of the positioning component when disassembled;

[0030] Figure 7 is a cross-sectional view of the filter box of the invention;

[0031] Figure 8 is a schematic structural diagram of the feeding mechanism of the invention when disassembled;

[0032] Figure 9 is a schematic structural diagram of the melting box and the injection machine of the invention.

[0033] Among them: 1. Base; 2. Cooling device; 3. Feeding mechanism; 4. Mold clamping mechanism; 5. Melting box; 6. Injection machine; 7. Discharge plate; 8. U-shaped pipe; 9. Feeding pipe; 10. Feed pump; 11. Liquid delivery pipe; 12. Injection pipe.

[0034] 21. Cooling box; 22. Connecting plate; 23. Drain pipe; 24. Return pipe; 25. Heat conduction pipe; 26. Circulation pump; 27. Water pump; 28. Water suction pipe; 29. Control valve; 210. Opening and closing valve; 211. Check valve; 212. Air inlet pipe; 213. Water supply pipe; 214. Valve body

[0035] 31. Diversion box; 32. Filter box; 33. Feeding box; 34. Nut; 35. Disassembly and installation plate; 36. Rotating blade; 37. Diversion block; 38. First electric push rod; 39. Push plate; 310. Filter plate; 311. Clamping plate; 312. Closing plate

[0036] 41. Frame body; 42. Lower mold; 43. Upper mold; 44. Cylinder; 45. Extension frame; 46. Fixed rod; 47. Slide block; 48. Linking plate; 49. Fixed plate; 410. Second electric push rod; 411. Positioning plate Specific embodiments

[0037] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention

[0038] Please refer to Figures 1-4 , a plastic injection molding machine with a cooling mechanism, including: a base 1, a melting box 5 and an injection machine 6 are fixed on the top of the base 1, and a discharge plate 7 is installed on one side of the base 1; a cooling device 2, the cooling device 2 is located on one side of the base 1 and is used to cool the mold clamping mechanism 4. The cooling device 2 includes a cooling box 21 arranged on one side of the base 1. A plurality of connecting plates 22 are fixed between the cooling box 21 and the base 1, and a water injection pipe and a drain pipe 23 are connected to the outer wall of the cooling box 21. A heat conduction pipe 25 is arranged inside the base 1. One end of the heat conduction pipe 25 is connected to a return pipe 24, and the return pipe 24 is connected to the condenser. A circulation pump 26 is fixed inside the cooling box 21. The water outlet end of the circulation pump 26 is connected to a water supply pipe 213, and the water supply pipe 213 is connected to the water inlet end of the heat conduction pipe 25. The bottom of the return pipe 24 is connected to a water suction pipe 28. A water pump 27 is also arranged inside the cooling box 21, and the water inlet end of the water pump 27 is connected to the water suction pipe 28. The top of the water supply pipe 213 is connected to an air inlet pipe 212. A control valve 29 is arranged inside the water suction pipe 28. An opening and closing valve 210 is arranged inside the air inlet pipe 212. A check valve 211 is arranged inside the water supply pipe 213

[0039] The basic structure of a plastic injection molding machine with a cooling mechanism mainly includes a base 1, on the top of which a melting tank 5 and an injection machine 6 are fixed, and a discharge plate 7 is installed on one side; a cooling device 2 located on one side of the base 1 for cooling the mold clamping mechanism 4, which includes a cooling tank 21, a connecting plate 22, a water injection pipe, a drain pipe 23, a heat conduction pipe 25, a condenser, a circulation pump 26, a water supply pipe 213, a return pipe 24, a water extraction pipe 28, a water extraction pump 27, etc., and also provided with components such as a control valve 29, an opening and closing valve 210 and a check valve 211 to ensure the coolant circulation and the normal operation of the system;

[0040] Furthermore, as Figure 9 shown, a connecting pipe is connected to the bottom of the melting tank 5, a feeding pump 10 is fixed inside the base 1, the feeding end of the feeding pump 10 is connected to the connecting pipe, and the discharging end of the feeding pump 10 is connected to a liquid infusion pipe 11, the liquid infusion pipe 11 is connected to the injection machine 6, an injection pipe 12 is connected to one side of the injection machine 6, the injection pipe 12 corresponds to the lower mold 42, a U-shaped pipe 8 is connected to the bottom of one side of the injection machine 6, and a reinforcing sleeve for reinforcing the U-shaped pipe 8 is installed between the U-shaped pipe 8 and the injection machine 6; Based on this, the bottom of the melting tank 5 is connected to the feeding end of the feeding pump 10 inside the base 1 through the connecting pipe, the discharging end of the feeding pump 10 is connected to the injection machine 6 through the liquid infusion pipe 11, the injection pipe 12 on one side of the injection machine 6 corresponds to the lower mold 42, in addition, the U-shaped pipe 8 is connected to the bottom of one side of the injection machine 6, and a reinforcing sleeve is provided between the U-shaped pipe 8 and the injection machine 6 for reinforcement;

[0041] Please refer to Figures 3-6 , the mold clamping mechanism 4 includes a frame body 41 fixed on the top of the base 1 and a lower mold 42 installed at the bottom of the frame body 41. An upper mold 43 corresponding to the lower mold 42 is also arranged inside the frame body 41. A cylinder 44 is fixed on the top of the frame body 41, the output end of the cylinder 44 is connected to the upper mold 43, and a limiting component for limiting the upper mold 43 is arranged between the upper mold 43 and the frame body 41. The limiting component includes a plurality of fixed slots opened on both sides of the frame body 41, fixed rods 46 are fixedly installed inside the plurality of fixed slots, sliders 47 are sleeved on the outer walls of the plurality of fixed rods 46, and every two sliders 47 extend to one side of the frame body 41 and are jointly fixed with a linkage plate 48. A positioning component for positioning the sliders 47 is arranged on one side of the frame body 41. The positioning component includes a fixed plate 49 fixedly installed on one side of the frame body 41, two extension frames 45 are fixedly installed on one side of the fixed plate 49, a second electric push rod 410 is fixedly installed on one side of each of the two extension frames 45, the telescopic end of the second electric push rod 410 is connected to a positioning plate 411, a positioning groove is opened on one side of the frame body 41, the positioning groove penetrates through the fixed slot, the positioning plate 411 is inserted into the positioning groove, and an opening groove matched with the fixed rod 46 is opened inside the positioning plate 411;

[0042] The mold clamping mechanism 4 is installed on the top of the base 1 and is composed of a frame body 41, a lower mold 42 and an upper mold 43. The cylinder 44 at the top of the frame body 41 drives the upper mold 43 to cooperate with the lower mold 42. The limit component is used to limit the upper mold 43 and includes fixed rods 46 in the fixed slots on both sides of the frame body 41, sliders 47 sleeved on the fixed rods 46 and a linkage plate 48 connecting the sliders 47. The positioning component is used to position the sliders 47 and includes a fixed plate 49, an extension frame 45, a second electric push rod 410 and a positioning plate 411 on one side of the frame body 41. The positioning plate 411 can be inserted into the positioning slot of the frame body 41 and cooperate with the fixed rod 46 through the opening slot, so as to ensure that the separation of the lower mold 42 and the upper mold 43 is safer;

[0043] Please also refer to Figure 7 and Figure 8 In addition, the feeding mechanism 3 includes a diversion box 31 fixed on one side of the top of the base 1. A filter box 32 is fixed on the top of the diversion box 31. A feeding box 33 is installed on the top of the filter box 32. A rotating shaft is rotatably installed inside the feeding box 33. A plurality of uniformly distributed rotating blades 36 are fixedly installed on the outer wall of the rotating shaft. A feeding pipe 9 is connected between the diversion box 31 and the melting box 5. Guide blocks 37 are fixedly installed on both sides inside the filter box 32. A filter plate 310 is installed between the two guide blocks 37. A push plate 39 is arranged on one side of the top of the filter plate 310. The push plate 39 is inclined. A first electric push rod 38 is fixedly installed on one side of the filter box 32. The telescopic end of the first electric push rod 38 extends into the filter box 32 and is connected to the push plate 39. A discharge port is opened on one side of the filter box 32. A closing plate 312 is installed inside the discharge port. Two clamping plates 311 are fixed on both sides of the closing plate 312. The clamping plates 311 and the filter box 32 are fixed by bolts. A disassembly and assembly plate 35 is fixedly installed at the bottom of the feeding box 33. A plurality of uniformly distributed screw rods are fixed on the top of the filter box 32. Disassembly and assembly holes inserted with the plurality of screw rods are opened inside the disassembly and assembly plate 35, and a nut 34 screwed with the screw rod is arranged on the top of the disassembly and assembly plate 35;

[0044] Among them, the feeding mechanism 3 is fixed on one side of the top of the base 1. From bottom to top, there are a diversion box 31, a filter box 32 and a feeding box 33 in sequence. The diversion box 31 is connected to the melting box 5 through a feeding pipe 9. There is a rotating shaft with rotating blades 36 in the feeding box 33, which can preliminarily process the raw materials. There are guide blocks 37 on both sides inside the filter box 32, and a filter plate 310 is installed in the middle for filtering the raw materials; A first electric push rod 38 is provided to push the inclined push plate 39, which can push the filtered impurities towards the discharge port; The discharge port is provided with a closing plate 312 fixed by clamping plates 311 and bolts, which is convenient for cleaning impurities. The disassembly and assembly plate 35 at the bottom of the feeding box 33 realizes the convenient disassembly and assembly of the feeding box 33 and the filter box 32 through cooperation with the screw rods and nuts 34 on the top of the filter box 32.

[0045] The working principle of the present invention is:

[0046] First, the plastic raw material is poured into the feeding box 33. The rotating shaft in the feeding box 33 drives the rotating blades 36 to rotate, enabling the raw material to flow downward more smoothly. The raw material enters the filtering box 32 from the feeding box 33. The filter plate 310 in the filtering box 32 filters the raw material to remove impurities therein. The guide block 37 guides the raw material to flow towards the filter plate 310. As the filtering progresses, impurities will remain on the filter plate 310. At this time, the first electric push rod 38 pushes the inclined push plate 39 to push the impurities towards the discharge port. The clamping plate 311 and the filtering box 32 are separated by bolts, and the closing plate 312 is opened to discharge the impurities. The filtered raw material enters the melting box 5 through the diversion box 31 and the feeding pipe 9. The feeding box 33 is connected to the filtering box 32 through the disassembly and assembly plate 35, the screw rod and the nut 34, which is convenient for disassembly and maintenance. After the raw material enters the melting box 5, it is melted. The melted plastic enters the feeding pump 10 through the connecting pipe. The feeding pump 10 transports the melted plastic to the infusion pipe 11, and then enters the injection machine 6 through the infusion pipe 11. Through the setting of the U-shaped pipe 8, it is convenient for the staff to observe the liquid level inside the injection machine 6, and the U-shaped pipe 8 is reinforced by the reinforcing sleeve. Subsequently, the mold clamping mechanism 4 starts to work. The output end of the cylinder 44 at the top of the frame body 41 pushes the upper mold 43 to move downward to close with the lower mold 42. The limiting component ensures the accurate movement of the upper mold 43. Among them, the slider 47 slides on the fixed rod 46, and the linkage plate 48 connects the sliders 47. When the upper mold 43 moves to the top of the frame body 41, the positioning component is used to position the slider 47. The second electric push rod 410 pushes the positioning plate 411 to insert into the positioning groove. The opening groove of the positioning plate 411 cooperates with the fixed rod 46 to realize the positioning of the slider 47. Then, the injection machine 6 injects the melted plastic into the cavity formed by the lower mold 42 and the upper mold 43 through the injection pipe 12 to complete the plastic molding. Finally, the cooling device 2 cools the mold clamping mechanism 4. The circulating pump 26 in the cooling box 21 transports the coolant to the heat conduction pipe 25 through the water supply pipe 213. The heat conduction pipe 25 absorbs the heat of the mold clamping mechanism 4 to rapidly cool the formed plastic. The coolant after absorbing heat flows back to the condenser for cooling through the return pipe 24. After cooling, the one-way valve 211 and the valve body 214 are closed, and the opening and closing valve 210 and the control valve 29 are opened. The heat conduction pipe 25 is pumped by the water pump 27. Through the setting of the air inlet pipe 212, the situation that the heat conduction pipe 25 is deformed due to the action of the water pump 27 is avoided. By continuously pumping the heat conduction pipe 25, the cooling water inside it can enter the cooling box 21, so that the cooling water is not easily retained inside the heat conduction pipe 25, which is convenient for the cyclic operation of the upper mold 43 and the lower mold 42, and greatly improves the plastic molding efficiency of the present invention.

[0047] Although embodiments of the present invention have been shown and described, those of ordinary skill in the art will appreciate that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the invention, and the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A plastic injection molding machine with a cooling mechanism, characterized in that, Comprising: A base (1), on the top of which a melting tank (5) and an injection machine (6) are fixed, and a discharge plate (7) is installed on one side of the base (1); A feeding mechanism (3), which is located on one side of the top of the base (1) and is used to add plastic raw materials into the melting tank (5); A mold clamping mechanism (4), which is located on the top of the base (1) and is used to mold the plastic; A cooling device (2), which is located on one side of the base (1) and is used to cool the mold clamping mechanism (4). The cooling device (2) includes a cooling tank (21) arranged on one side of the base (1). A plurality of connecting plates (22) are fixed between the cooling tank (21) and the base (1). A water injection pipe and a drain pipe (23) are connected to the outer wall of the cooling tank (21). A heat conduction pipe (25) is arranged inside the base (1). A condenser is fixedly connected to one side of the cooling tank (21). One end of the heat conduction pipe (25) is connected to a return pipe (24), and the return pipe (24) is connected to the condenser. A circulation pump (26) is fixed inside the cooling tank (21). The water outlet end of the circulation pump (26) is connected to a water supply pipe (213), and the water supply pipe (213) is connected to the water inlet end of the heat conduction pipe (25).

2. The plastic injection molding machine with a cooling mechanism according to claim 1, characterized in that: The bottom of the return pipe (24) is connected to a water extraction pipe (28), and a water extraction pump (27) is further arranged inside the cooling tank (21). The water inlet end of the water extraction pump (27) is connected to the water extraction pipe (28).

3. The plastic injection molding machine with a cooling mechanism according to claim 2, characterized in that: The top of the water supply pipe (213) is connected to an air inlet pipe (212). A control valve (29) is arranged inside the water extraction pipe (28). An opening and closing valve (210) is arranged inside the air inlet pipe (212). A check valve (211) is arranged inside the water supply pipe (213). A valve body (214) is arranged inside the return pipe (24).

4. A plastic injection molding machine with a cooling mechanism according to claim 1, characterized in that: The mold clamping mechanism (4) includes a frame body (41) fixed on the top of the base (1) and a lower mold (42) installed at the bottom of the frame body (41). An upper mold (43) corresponding to the lower mold (42) is further arranged inside the frame body (41). A cylinder (44) is fixed on the top of the frame body (41). The output end of the cylinder (44) is connected to the upper mold (43). A limiting component for limiting the upper mold (43) is arranged between the upper mold (43) and the frame body (41).

5. A plastic injection molding machine with a cooling mechanism according to claim 4, characterized in that: The limiting component includes a plurality of fixing grooves opened on both sides of the frame body (41). A fixing rod (46) is fixedly installed inside each of the plurality of fixing grooves. A sliding block (47) is sleeved on the outer wall of each fixing rod (46). The extensions of every two sliding blocks (47) to one side of the frame body (41) are jointly fixed with a linkage plate (48). A positioning component for positioning the sliding block (47) is arranged on one side of the frame body (41).

6. The plastic injection molding machine with a cooling mechanism according to claim 5, wherein: The positioning component includes a fixing plate (49) fixedly installed on one side of the frame body (41). On one side of the fixing plate (49), two extension frames (45) are fixedly installed. On one side of each of the two extension frames (45), a second electric push rod (410) is fixedly installed. The telescopic end of the second electric push rod (410) is connected to a positioning plate (411). A positioning groove is formed on one side of the frame body (41), and the positioning groove penetrates through the fixing groove. The positioning plate (411) is inserted into the positioning groove, and an opening groove matching with the fixing rod (46) is formed inside the positioning plate (411).

7. A plastic injection molding machine with a cooling mechanism according to claim 1, characterized in that: The feeding mechanism (3) includes a diversion box (31) fixed on one side of the top of the base (1). A filtering box (32) is fixed on the top of the diversion box (31). A feeding box (33) is installed on the top of the filtering box (32). A rotating shaft is rotatably installed inside the feeding box (33). A plurality of uniformly distributed rotating blades (36) are fixedly installed on the outer wall of the rotating shaft. A feeding pipe (9) is connected between the diversion box (31) and the melting box (5).

8. A plastic injection molding machine with a cooling mechanism according to claim 7, characterized in that: On both sides inside the filtering box (32), diversion blocks (37) are fixedly installed. A filtering plate (310) is installed between the two diversion blocks (37). On one side of the top of the filtering plate (310), a push plate (39) is arranged. The push plate (39) is inclined. A first electric push rod (38) is fixedly installed on one side of the filtering box (32). The telescopic end of the first electric push rod (38) extends into the filtering box (32) and is connected to the push plate (39).

9. The plastic injection molding machine with a cooling mechanism according to claim 8, characterized in that: A discharge port is formed on one side of the filtering box (32). A closing plate (312) is installed inside the discharge port. Two clamping plates (311) are fixed on both sides of the closing plate (312). The clamping plates (311) are fixed to the filtering box (32) by bolts. A disassembly and assembly plate (35) is fixedly installed at the bottom of the feeding box (33). A plurality of uniformly distributed screw rods are fixed on the top of the filtering box (32). Disassembly and assembly holes into which the plurality of screw rods are inserted are formed inside the disassembly and assembly plate (35), and nuts (34) screwed with the screw rods are arranged on the top of the disassembly and assembly plate (35).

10. The plastic injection molding machine with a cooling mechanism according to claim 1, characterized in that: A connecting pipe is connected to the bottom of the melting box (5). A feeding pump (10) is fixed inside the base (1). The feeding end of the feeding pump (10) is connected to the connecting pipe, and the discharging end of the feeding pump (10) is connected to an infusion pipe (11). The infusion pipe (11) is connected to an injection machine (6). An injection pipe (12) is connected to one side of the injection machine (6). The injection pipe (12) corresponds to the lower die (42). A U-shaped pipe (8) is connected to the bottom of one side of the injection machine (6). A reinforcing sleeve for reinforcing the U-shaped pipe (8) is installed between the U-shaped pipe (8) and the injection machine (6).

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