Plastic particle extrusion molding device and preparation process thereof

Abstract

The invention discloses a plastic particle extrusion molding device and a preparation process thereof, relates to the technical field of plastic particle extrusion, and aims to solve the technical problems that a columnar plastic strip is easily rapidly shrunk and deformed and the molding quality of the columnar plastic strip is reduced because molten plastic is instantaneously contacted with a low-temperature environment of a water cooling tank from a high-temperature environment of a machine head. Comprising an extrusion assembly, a pre-cooling assembly and a cooling assembly, the extrusion assembly comprises a motor, a screw, a stock bin column and a hopper, the screw penetrates through a fixing block and extends into the stock bin column, a heating box is arranged on the outer wall of the circumference of the stock bin column, the other end of the stock bin column is connected with a tubular machine head, and an inner cavity of the tubular machine head communicates with an inner cavity of the stock bin column; a plurality of discharging pipes are arranged in the tubular machine head, the pre-cooling assembly comprises a cooling liquid box body, a first water pipe, a water pump and a second water pipe, and the output end of the second water pipe communicates with an inner cavity of the tubular machine head. The device has the advantages that the deformation condition of the columnar plastic strip is reduced, and the forming quality of the columnar plastic strip is improved.

Description

Technical Field

[0001] The invention relates to the technical field of plastic particle extrusion, and more specifically to a plastic particle extrusion molding device and a preparation process thereof. Background Art

[0002] Plastic particles are raw materials of plastic in the form of granules. Plastic particles are usually obtained through polymerization or processing of plastic waste. They have different properties and uses, which depend on their chemical composition, molecular weight, crystallinity and other factors. Common types of plastic particles include polyethylene (PE) particles, polypropylene (PP) particles, polystyrene (PS) particles, polyvinyl chloride (PVC) particles, etc. In the plastics industry, the quality and performance of plastic particles play a vital role in the quality of the final plastic products. At the same time, the production and use of plastic particles also have a certain impact on the environment. For example, improper treatment of waste plastic particles may cause environmental pollution; Plastic particle extrusion molding is a common and important plastic processing method. Its working principle is to melt the plastic particles by heating, and then extrude them through the mold in a continuous manner under the push of the screw of the extruder to form products with a specific cross-sectional shape. This molding method has many advantages. First, it has high production efficiency and can achieve continuous large-scale production. Secondly, it can produce products of various shapes and sizes, such as pipes, plates, rods, films, etc. Thirdly, the extrusion molding process is relatively simple and the cost is low. Plastic particle extrusion molding plays an important role in the plastic processing industry and provides efficient and reliable solutions for the production of various plastic products.

[0003] In the process of extruding plastic particles into columnar plastic strips, the existing plastic particle extrusion molding device usually heats the plastic particles to melt them, and then extrudes the plastic particles through the round hole mold of the die head under the push of the screw of the extruder to form a columnar plastic strip, and uses a water cooling tank and an air cooling device to quickly cool the extruded molten plastic to solidify it. The molten plastic is directly extruded and the high temperature environment of the die head is instantly exposed to the low temperature environment of the water cooling tank, which easily causes the columnar plastic strip to shrink and deform rapidly, thereby reducing the quality of the columnar plastic strip. In view of this, we propose a plastic particle extrusion molding device and a preparation process thereof. Summary of the invention

[0004] The purpose of the present invention is to provide a plastic particle extrusion molding device to solve the technical problem that the molten plastic is easily caused to shrink and deform rapidly in the columnar plastic strip when it is instantly exposed to the low temperature environment of the water cooling tank from the high temperature environment of the head, thereby reducing the quality of the columnar plastic strip molding.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: a plastic particle extrusion molding device, comprising an extrusion component, a pre-cooling component and a cooling component; The extrusion assembly comprises a bottom plate, a motor is arranged on the top surface of the bottom plate, a gear 1 is arranged at the output end of the motor, a gear 2 is meshed at the output end of the gear 1, a rotating shaft is connected to the side wall of the gear 2, and a screw is connected to the end of the rotating shaft; The top surface of the bottom plate is also provided with a fixed block, a plurality of support frames and a support block, a silo column is provided above the support frame, and the end of the silo column is connected to the side wall of the fixed block; The screw rod passes through the fixed block and extends to the interior of the silo column, and the screw rod is rotatably connected to the interior of the fixed block and the interior of the silo column through a bearing; The top surface of the support block is connected to a plurality of support plates, a hopper is arranged between the plurality of support plates, and the bottom of the hopper is connected to the interior of the silo column; The circumferential outer wall of the silo column is provided with a heating box, and a heating pipe is provided inside the heating box; The other end of the silo column is connected to a tubular head, the inner cavity of the tubular head is connected to the inner cavity of the silo column, and a plurality of discharge pipes are arranged inside the tubular head; The pre-cooling component includes a coolant tank, a water pipe 1 is provided at the output end of the coolant tank, a water pump is provided at the output end of the water pipe 1, a water pipe 2 is provided at the output end of the water pump, the output end of the water pipe 2 is connected to the inner cavity of the tubular head, the bottom of the inner cavity of the tubular head is connected to a water pipe 3, and the output end of the water pipe 3 is connected to the inside of the coolant tank; A porous plate is provided at the end of the inner cavity of the tubular head, a drainage block is provided on the side wall of the porous plate, a plurality of drainage holes are opened on the side wall of the drainage block, and the drainage block is connected with the inner cavity of the discharge pipe through the drainage holes; The plurality of discharge pipes divide the inner cavity of the tubular head into an upper channel and a lower channel; The inner cavity of the tubular head is provided with a plurality of guide plates, the side walls of the guide plates are provided with a plurality of guide grooves, and the inner side wall of the tubular head is provided with a connecting hole for connecting the upper channel and the lower channel; A blocking plate is provided at the other end of the inner cavity of the tubular die head, and the discharge pipe passes through the side wall of the blocking plate; The cooling assembly comprises a water tank, and a plurality of supporting plates are arranged inside the water tank.

[0006] Preferably, a gear bin is further provided on the top surface of the bottom plate, an upper cover plate is provided on the top of the gear bin, and the gear one and the gear two are rotatably connected inside the gear bin.

[0007] Preferably, the heating tube is spirally wound around the circumferential outer wall of the silo column, and a plurality of strip grooves are provided on the top of the heating box.

[0008] Preferably, the coolant tank is U-shaped and surrounds the outer side wall of the bottom plate, and a liquid filling port is provided on the top.

[0009] Preferably, a pump rack is provided on the side wall of the bottom plate, the water pump and the pipe rack are provided above the pump rack, and the water pipe 2 is sleeved on the top of the pipe rack.

[0010] Preferably, a plurality of square holes are formed on the side wall of the porous plate, and the side wall of the porous plate is connected to the inner cavity of the silo column.

[0011] Preferably, the circumferential outer walls of the plurality of discharge pipes are connected in pairs, the side wall of the drainage block is in the shape of a curved surface with an open structure, and the side wall of the drainage block is tightly welded to the discharge pipe.

[0012] Preferably, the guide support plate is a disc-shaped structure, a plurality of discharge pipes penetrate the side wall of the guide support plate and are tightly welded to the guide support plate, and the circumferential side wall of the guide support plate is tightly welded to the inner wall of the tubular head.

[0013] Preferably, a plurality of supporting grooves are provided on the top of the supporting plate, and the supporting grooves are in a semicircular arc groove structure.

[0014] Preferably, the preparation process of the plastic particle extrusion molding device comprises the following steps: S1, loading, pouring plastic particles into the hopper; S2, extrusion, through the motor, drives gear 1 and gear 2 to rotate, gear 2 drives the shaft to rotate, the shaft drives the screw to rotate, during the screw rotation, drives the plastic particles in the hopper to move forward inside the silo column, the heating tube is powered by an external power supply, the heating tube generates high temperature, the high temperature is transmitted to the side wall of the silo column, and the silo column further generates high temperature, the plastic particles are melted into liquid, the screw continues to push the molten plastic forward, and is extruded through multiple discharge pipes of the tubular head to form a columnar plastic strip; S3, pre-cooling. When the molten plastic enters the discharge pipe, the water pump works to guide the coolant in the coolant box through water pipes 1 and 2 into the upper channel of the inner cavity of the tubular head. The coolant flows forward in the upper channel and flows into the lower channel through the connecting hole. The coolant absorbs the heat of the molten plastic in the discharge pipe during the flow of the upper and lower channels, so that the molten plastic can be slowly cooled and formed in the discharge pipe. The coolant flows into the coolant box through water pipe 3 connected to the lower channel to take away the heat. After entering the coolant box, the coolant gradually cools down and circulates to continuously cool the discharge pipe. S4, cooling and molding. When the molten plastic flows out from the discharge pipe, a columnar plastic strip is formed. A plurality of supporting plates are used to hold up the columnar plastic strip. At this time, the columnar plastic strip is rapidly cooled down by the cold water inside the water tank, so that the columnar plastic strip is quickly solidified and formed. The columnar plastic strip is pulled at a constant speed by an external traction device to ensure its uniform size and straightness.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. When the molten plastic enters the discharge pipe, the present invention uses a water pump to guide the coolant in the coolant box through water pipes 1 and 2 into the upper channel of the inner cavity of the tubular head. The coolant flows forward in the upper channel and flows into the lower channel through the connecting hole. The coolant absorbs the heat of the molten plastic in the discharge pipe during the flow of the upper channel and the lower channel, so that the molten plastic can be slowly cooled and formed in the discharge pipe. The coolant flows into the coolant box through water pipe 3 connected to the lower channel to take away the heat. After entering the coolant box, the coolant gradually cools down and circulates. , continuously cool down the discharge pipe, and cooperate with the plasticity of the tubular shape inside the discharge pipe to make it difficult for the molten plastic to deform when the temperature inside the discharge pipe is reduced, and always maintain the shape of the columnar plastic strip. When the molten plastic flows out from the inside of the discharge pipe and enters the water tank, it avoids rapid drop from high temperature to low temperature, reduces the deformation of the columnar plastic strip, and makes the columnar plastic strip quickly solidify and form, improves the quality of the columnar plastic strip forming, and solves the problem that the molten plastic is easily caused to shrink and deform rapidly due to the high temperature environment of the machine head and the low temperature environment of the water cooling tank, thereby reducing the quality of the columnar plastic strip forming.

[0016] 2. The present invention also designs the side wall of the drainage block as a curved surface shape of an open structure, which can effectively squeeze the molten plastic from the opening into the drainage hole until it enters the inner cavity of the discharge pipe. The molten plastic flows from the larger space of the drainage block opening structure to the smaller space of the drainage hole, which can increase the density of the molten plastic after forming a columnar plastic strip, reduce the pores inside the columnar plastic strip, and further improve the molding quality of the columnar plastic strip.

[0017] 3. The present invention also designs a guide support plate with a disc-shaped structure, and opens a plurality of guide grooves on the side wall of the guide support plate, which can not only reinforce the discharge pipe to prevent the discharge pipe from shaking and affecting the molding effect of the columnar plastic strips, but also enable the coolant to flow into the lower channel through the guide groove, slowing down the flow rate of the coolant, increasing the time for the coolant to absorb the heat of the discharge pipe, further improving the slow cooling effect of the discharge pipe, and avoiding the situation where the molten plastic is easily formed by rapid cooling. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of partial disassembly of the overall structure of the present invention; Figure 3 It is an enlarged schematic diagram of the internal structure of the gear chamber of the present invention; Figure 4 It is an enlarged schematic diagram of the supporting plate structure of the present invention; Figure 5 It is a schematic diagram of the cross-sectional structure of a silo column of the present invention; Figure 6 It is a schematic diagram of the screw structure of the present invention; Figure 7 It is a schematic diagram of the structure of the pre-cooling component of the present invention; Figure 8 It is a schematic diagram of the cutaway structure of the tubular handpiece of the present invention; Fig. 9 It is a schematic diagram of the structure of the discharge pipe and the drainage block of the present invention; Fig.10 The figure is a schematic diagram of a usage state of the present invention.

[0019] Description of the numbers in the figure: 1. Extrusion component; 2. Pre-cooling component; 3. Cooling component; 101, bottom plate; 102, motor; 103, gear bin; 1031, upper cover plate; 104, gear 1; 105, gear 2; 106, rotating shaft; 107, screw rod; 108, fixing block; 109, supporting frame; 110, supporting block; 111, silo column; 112, supporting plate; 113, hopper; 114, heating tube; 115, heating box; 116, strip groove; 117, tubular head; 118, discharge pipe; 201, coolant tank; 2011, liquid filling port; 202, water pipe 1; 203, water pump; 204, water pipe 2; 205, water pipe 3; 206, pump rack; 207, pipe rack; 208, porous plate; 209, drainage block; 2091, drainage hole; 210, diversion support plate; 2101, diversion groove; 211, connecting hole; 212, baffle plate; 301. Water tank; 302. Support plate; 303. Support trough. DETAILED DESCRIPTION

[0020] like Figures 1 to 10 As shown, the present invention relates to a plastic particle extrusion molding device, comprising an extrusion component 1, a pre-cooling component 2 and a cooling component 3; In an embodiment of the present invention, the extrusion assembly 1 includes a bottom plate 101, a motor 102 is arranged on the top surface of the bottom plate 101, a gear 104 is arranged on the output end of the motor 102, a gear 105 is meshed with the output end of the gear 104, a rotating shaft 106 is connected to the side wall of the gear 105, a screw 107 is connected to the end of the rotating shaft 106, a fixing block 108, a plurality of support frames 109 and a support block 110 are also arranged on the top surface of the bottom plate 101, and a silo column is arranged above the support frame 109. 111, the end of the silo column 111 is connected to the side wall of the fixed block 108, the screw 107 penetrates the fixed block 108 and extends to the inside of the silo column 111, the screw 107 is rotatably connected to the inside of the fixed block 108 and the inside of the silo column 111 through a bearing, a plurality of support plates 112 are connected to the top surface of the support block 110, a hopper 113 is arranged between the plurality of support plates 112, the bottom of the hopper 113 is connected to the inside of the silo column 111, and a heating box 115 is arranged on the outer wall of the circumference of the silo column 111 A heating tube 114 is arranged inside the heating box 115, and a tubular head 117 is connected to the other end of the silo column 111. The inner cavity of the tubular head 117 is connected to the inner cavity of the silo column 111, and a plurality of discharge pipes 118 are arranged inside the tubular head 117. The present invention pours plastic particles into the hopper 113, and drives the motor 102 to rotate the gear 104 and the gear 2 105, and the gear 2 105 drives the shaft 106 to rotate, and the shaft 106 drives the screw 107 During the rotation of the screw 107, the plastic particles in the hopper 113 are driven to move forward inside the silo column 111, and the heating tube 114 is powered by an external power supply, so that the heating tube 114 generates high temperature, and the high temperature is transmitted to the side wall of the silo column 111, and further high temperature is generated inside the silo column 111, melting the plastic particles into liquid. The screw 107 continues to push the molten plastic forward and extrude it through multiple discharge pipes 118 of the tubular head 117 to form a columnar plastic strip.

[0021] In an embodiment of the present invention, the pre-cooling component 2 includes a cooling liquid tank 201, a water pipe 202 is provided at the output end of the cooling liquid tank 201, a water pump 203 is provided at the output end of the water pipe 202, a water pipe 204 is provided at the output end of the water pump 203, the output end of the water pipe 204 is connected to the inner cavity of the tubular head 117, the bottom of the inner cavity of the tubular head 117 is connected to the water pipe 3 205, the output end of the water pipe 3 205 is connected to the inside of the cooling liquid tank 201, a porous plate 208 is provided at the end of the inner cavity of the tubular head 117, a drainage block 209 is provided on the side wall of the porous plate 208, and a plurality of drainage holes 2091 are opened on the side wall of the drainage block 209, The drainage block 209 is connected to the inner cavity of the discharge pipe 118 through the drainage hole 2091. The multiple discharge pipes 118 divide the inner cavity of the tubular head 117 into an upper channel and a lower channel. The inner wall of the tubular head 117 is provided with a connecting hole 211 for connecting the upper channel and the lower channel. A blocking plate 212 is provided at the other end of the inner cavity of the tubular head 117. The discharge pipe 118 passes through the side wall of the blocking plate 212. The cooling component 3 includes a water tank 301. A plurality of supporting plates 302 are provided inside the water tank 301. A plurality of supporting grooves 303 are provided on the top of the supporting plate 302. The supporting grooves 303 are semicircular arc groove structures for supporting the formed columnar plastic strips. When the molten plastic enters the discharge pipe 118, the water pump 203 is used to guide the coolant in the coolant box 201 into the upper channel of the inner cavity of the tubular head 117 through the water pipe 1 202 and the water pipe 2 204. The coolant flows forward in the upper channel and flows into the lower channel through the connecting hole 211. The process of the coolant flowing in the upper channel and the lower channel absorbs the heat of the molten plastic in the discharge pipe 118, so that the molten plastic can be slowly cooled and formed in the discharge pipe 118. The coolant flows into the discharge pipe 118 through the water pipe 3 205 connected to the lower channel. The heat is taken away from the coolant box 201. After entering the coolant box 201, the coolant gradually cools down and circulates, continuously cooling the discharge pipe 118. Combined with the plasticity of the tubular shape inside the discharge pipe 118, the molten plastic is difficult to deform when the temperature inside the discharge pipe 118 is cooled, and the shape of the columnar plastic strip is always maintained. When the molten plastic flows out from the inside of the discharge pipe and enters the water tank, it avoids rapid cooling from high temperature to low temperature, reduces the deformation of the columnar plastic strip, and makes the columnar plastic strip quickly solidify and form, thereby improving the molding quality of the columnar plastic strip.

[0022] In an embodiment of the present invention, a gear bin 103 is further provided on the top surface of the bottom plate 101, an upper cover plate 1031 is provided on the top of the gear bin 103, and gear one 104 and gear two 105 are rotatably connected inside the gear bin 103. By arranging gear one 104 and gear two 105 inside the gear bin 103 and sealing them with the upper cover plate 1031, it is possible to prevent gear one 104 and gear two 105 from being interfered with by foreign objects.

[0023] As another embodiment of the present invention, the heating tube 114 is spirally wound around the circumferential outer wall of the silo column 111 , and a plurality of strip grooves 116 are provided on the top of the heating box 115 , and the strip grooves 116 are used to dissipate heat inside the heating box 115 .

[0024] As another embodiment of the present invention, the coolant box 201 is U-shaped and surrounds the outer wall of the bottom plate 101, and a liquid filling port 2011 is set on the top, which is conducive to extending the flow distance of the coolant inside the coolant box 201 and increasing the cooling time of the coolant.

[0025] As another embodiment of the present invention, a pump rack 206 is provided on the side wall of the bottom plate 101 , a water pump 203 and a pipe rack 207 are provided above the pump rack 206 , a water pipe 204 is sleeved on the top of the pipe rack 207 , and the water pipe 204 is fixed by the pump rack 206 .

[0026] As another embodiment of the present invention, a plurality of square holes are formed on the side wall of the porous plate 208, and the side wall of the porous plate 208 is connected to the inner cavity of the silo column 111. The function of the porous plate 208 is to change the trajectory of the molten plastic movement and filter some impurities using the directional holes.

[0027] As another embodiment of the present invention, the circumferential outer walls of a plurality of discharge pipes 118 are connected in pairs, the side walls of the drainage block 209 are curved with an open structure, and the side walls of the drainage block 209 are tightly welded to the discharge pipe 118; the present invention designs the side walls of the drainage block 209 to be curved with an open structure, so that the molten plastic can be effectively squeezed from the opening into the drainage hole 2091 until it enters the inner cavity of the discharge pipe 118. The molten plastic flows from the larger space of the opening structure of the drainage block 209 to the smaller space of the drainage hole 2091, which can increase the density of the molten plastic after forming a columnar plastic strip, reduce the pores inside the columnar plastic strip, and further improve the molding quality of the columnar plastic strip.

[0028] As another embodiment of the present invention, the inner cavity of the tubular head 117 is provided with a plurality of guide branches 210, and the side walls of the guide branches 210 are provided with a plurality of guide grooves 2101. The guide branches 210 are in a disc-shaped structure, and a plurality of discharge pipes 118 penetrate through the side walls of the guide branches 210 and are tightly welded to the guide branches 210, and the circumferential side walls of the guide branches 210 are tightly welded to the inner side walls of the tubular head 117. The present invention also designs a guide branch 210 with a disc-shaped structure, and provides a plurality of guide grooves 2101 on the side walls of the guide branches 210, which can not only reinforce the discharge pipe 118 to prevent the discharge pipe 118 from shaking and affecting the effect of forming the columnar plastic strips, but also enable the coolant to flow into the lower channel through the guide grooves 2101, slowing down the flow rate of the coolant, and increasing the time for the coolant to absorb the heat of the discharge pipe 118, further improving the slow cooling effect of the discharge pipe 118, and avoiding the situation where the molten plastic is easily formed by rapid cooling.

[0029] Working principle: This embodiment provides a preparation process of a plastic particle extrusion molding device. First, plastic particles are poured into the hopper 113. The motor 102 works to drive the gear 104 and the gear 2 105 to rotate. The gear 2 105 drives the shaft 106 to rotate. The shaft 106 drives the screw 107 to rotate. During the rotation of the screw 107, the plastic particles in the hopper 113 are driven to move forward inside the silo column 111. The heating tube 114 is powered by an external power supply to generate high temperature. The high temperature is transmitted to the side wall of the silo column 111, and the high temperature is further generated inside the silo column 111 to melt the plastic particles into liquid. The screw 107 continues to push the molten plastic forward and extrude it through the multiple discharge pipes 118 of the tubular head 117 to form a columnar plastic strip. When the molten plastic enters the discharge pipe 118, the water pump 203 works to pump the coolant in the coolant box 201 through the water pipe 1 202 and the water pipe 2 203. 04 is guided into the upper channel of the inner cavity of the tubular head 117, the coolant flows forward in the upper channel, and flows into the lower channel through the connecting hole 211. The process of the coolant flowing in the upper channel and the lower channel will absorb the heat of the molten plastic inside the discharge pipe 118, so that the molten plastic can be slowly cooled and formed in the discharge pipe 118, and the coolant flows into the coolant tank 201 through the water pipe 3 205 connected to the lower channel to take away the heat. After entering the coolant tank 201, the coolant gradually cools down and circulates to continuously cool the discharge pipe 118. When the molten plastic flows out from the inside of the discharge pipe 118, a columnar plastic strip is formed, and the columnar plastic strip is supported by multiple supporting plates 302. At this time, the columnar plastic strip is inside the water tank 301, and is rapidly cooled by the cold water inside the water tank 301, so that the columnar plastic strip is quickly solidified and formed, and cooperates with the external traction device to pull the columnar plastic strip at a constant speed to ensure its uniform size and straightness.

[0030] The embodiments of the present invention disclose preferred embodiments, but are not limited thereto. A person skilled in the art can easily understand the spirit of the present invention based on the above embodiments and make different extensions and changes. However, as long as they do not deviate from the spirit of the present invention, they are all within the protection scope of the present invention.

Claims

1. A plastic particle extrusion molding device, characterized in that: It comprises an extrusion component (1), a pre-cooling component (2) and a cooling component (3); The extrusion assembly (1) comprises a bottom plate (101), a motor (102) is arranged on the top surface of the bottom plate (101), a gear 1 (104) is arranged at the output end of the motor (102), a gear 2 (105) is meshed with the output end of the gear 1 (104), a rotating shaft (106) is connected to the side wall of the gear 2 (105), and a screw (107) is connected to the end of the rotating shaft (106); The top surface of the bottom plate (101) is further provided with a fixed block (108), a plurality of support frames (109) and a support block (110); a silo column (111) is provided above the support frame (109); the end of the silo column (111) is connected to the side wall of the fixed block (108); The screw rod (107) passes through the fixing block (108) and extends to the interior of the silo column (111); the screw rod (107) is rotatably connected to the interior of the fixing block (108) and the interior of the silo column (111) via a bearing; A plurality of support plates (112) are connected to the top surface of the support block (110), a hopper (113) is provided between the plurality of support plates (112), and the bottom of the hopper (113) is connected to the interior of the silo column (111); A heating box (115) is provided on the circumferential outer wall of the silo column (111), and a heating pipe (114) is provided inside the heating box (115); The other end of the silo column (111) is connected to a tubular head (117); the inner cavity of the tubular head (117) is in communication with the inner cavity of the silo column (111); and a plurality of discharge pipes (118) are arranged inside the tubular head (117); The pre-cooling component (2) comprises a cooling liquid tank (201), the output end of the cooling liquid tank (201) is provided with a water pipe 1 (202), the output end of the water pipe 1 (202) is provided with a water pump (203), the output end of the water pump (203) is provided with a water pipe 2 (204), the output end of the water pipe 2 (204) is connected to the inner cavity of the tubular head (117), the bottom of the inner cavity of the tubular head (117) is connected to a water pipe 3 (205), and the output end of the water pipe 3 (205) is connected to the interior of the cooling liquid tank (201); A porous plate (208) is provided at the end of the inner cavity of the tubular head (117); a drainage block (209) is provided on the side wall of the porous plate (208); a plurality of drainage holes (2091) are opened on the side wall of the drainage block (209); and the drainage block (209) is connected to the inner cavity of the discharge pipe (118) through the drainage holes (2091); The plurality of discharge pipes (118) divide the inner cavity of the tubular head (117) into an upper channel and a lower channel; The inner cavity of the tubular head (117) is provided with a plurality of guide plates (210), the side walls of the guide plates (210) are provided with a plurality of guide grooves (2101), and the inner side wall of the tubular head (117) is provided with a connecting hole (211) for connecting the upper channel and the lower channel; A blocking plate (212) is provided at the other end of the inner cavity of the tubular machine head (117), and the discharge pipe (118) passes through the side wall of the blocking plate (212); The cooling assembly (3) comprises a water tank (301), and a plurality of supporting plates (302) are arranged inside the water tank (301).

2. The plastic particle extrusion molding device according to claim 1, characterized in that: A gear bin (103) is also provided on the top surface of the bottom plate (101), an upper cover plate (1031) is provided on the top of the gear bin (103), and the gear one (104) and the gear two (105) are rotatably connected inside the gear bin (103).

3. The plastic particle extrusion molding device according to claim 2, characterized in that: The heating tube (114) is spirally wound around the circumferential outer wall of the silo column (111), and a plurality of strip grooves (116) are provided on the top of the heating box (115).

4. The plastic particle extrusion molding device according to claim 3, characterized in that: The cooling liquid box body (201) is in a U-shape and surrounds the outer wall of the bottom plate (101), and a liquid filling port (2011) is provided on the top.

5. The plastic particle extrusion molding device according to claim 4, characterized in that: A pump rack (206) is arranged on the side wall of the bottom plate (101), the water pump (203) and a pipe rack (207) are arranged above the pump rack (206), and the second water pipe (204) is sleeved on the top of the pipe rack (207).

6. The plastic particle extrusion molding device according to claim 5, characterized in that: A plurality of square holes are formed on the side wall of the porous plate (208), and the side wall of the porous plate (208) is connected to the inner cavity of the silo column (111).

7. The plastic particle extrusion molding device according to claim 6, characterized in that: The circumferential outer walls of the plurality of discharge pipes (118) are connected in pairs, the side wall of the drainage block (209) is in the shape of a curved surface with an open structure, and the side wall of the drainage block (209) is tightly welded to the discharge pipe (118).

8. The plastic particle extrusion molding device according to claim 7, characterized in that: The guide support plate (210) is in a disc-shaped structure, a plurality of discharge pipes (118) penetrate the side wall of the guide support plate (210) and are tightly welded to the guide support plate (210), and the circumferential side wall of the guide support plate (210) is tightly welded to the inner side wall of the tubular machine head (117).

9. The plastic particle extrusion molding device according to claim 8, characterized in that: A plurality of supporting grooves (303) are provided on the top of the supporting plate (302), and the supporting grooves (303) are in the form of semicircular arc groove structures.

10. The process for preparing a plastic particle extrusion molding device according to claim 9, characterized in that: The following steps are involved: S1, loading, pouring plastic particles into the hopper (113); S2, extrusion, the motor (102) drives the gear 1 (104) and the gear 2 (105) to rotate, the gear 2 (105) drives the rotating shaft (106) to rotate, the rotating shaft (106) drives the screw (107) to rotate, and during the rotation of the screw (107), the plastic particles in the hopper (113) are driven to move forward inside the silo column (111), and the heating tube (114) is powered by an external power supply, so that the heating tube (114) generates a high temperature, which is transmitted to the side wall of the silo column (111), and further generates a high temperature inside the silo column (111), melting the plastic particles into a liquid state, and the screw (107) continues to push the molten plastic forward, and extrudes it through a plurality of discharge pipes (118) of the tubular head (117) to form a columnar plastic strip; S3, pre-cooling, when the molten plastic enters the discharge pipe (118), the water pump (203) works to guide the coolant in the coolant box (201) through the water pipe 1 (202) and the water pipe 2 (204) into the upper channel of the inner cavity of the tubular head (117), the coolant flows forward in the upper channel, and flows into the lower channel through the connecting hole (211). The coolant absorbs the heat of the molten plastic in the discharge pipe (118) during the flow of the coolant in the upper channel and the lower channel, so that the molten plastic can be slowly cooled and formed in the discharge pipe (118), and the coolant flows into the coolant box (201) through the water pipe 3 (205) connected to the lower channel to take away the heat. After entering the coolant box (201), the coolant gradually cools down and circulates, thereby continuously cooling the discharge pipe (118); S4, cooling and molding. When the molten plastic flows out from the discharge pipe (118), a columnar plastic strip is formed. The columnar plastic strip is supported by a plurality of support plates (302). At this time, the columnar plastic strip is rapidly cooled by the cold water in the water tank (301) so that the columnar plastic strip is quickly solidified and formed. The columnar plastic strip is pulled at a constant speed by an external pulling device to ensure uniform size and straightness.

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