Energy-saving and environment-friendly plastic part extruder and method thereof

Abstract

The invention relates to the technical field of plastic part machining, in particular to an energy-saving and environment-friendly plastic part extruder and a method thereof.The energy-saving and environment-friendly plastic part extruder comprises a frame, the top of the frame is connected with a machine barrel through bolts, the left side of the top of the machine barrel communicates with a feeding barrel, and the left side of the machine barrel is connected with a gear motor through bolts; and the output end of the gear motor penetrates into an inner cavity of the machine barrel and is fixedly connected with a screw rod, and the front side and the rear side of the right side of the machine barrel are connected with supporting plates through bolts. Through cooperation of a heat exchange mechanism, a copper pipe, a first support and a limiting mechanism, the heat recovery function is achieved, a proper amount of water liquid is added into an inner cavity of a water tank, a water pump operates to convey the water liquid into the copper pipe through a water conveying pipe, heat on the surface of a plastic part is transferred to a heat conduction barrel, and the heat conduction barrel transfers the heat to the water liquid in the copper pipe; and the heated water liquid is conveyed to the inner cavity of the water tank through a water return pipe, and heat recovery operation is completed.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of plastic part processing, in particular to an energy-saving and environment-friendly plastic part extruder and a method thereof. BACKGROUND

[0002] As a core equipment in the field of plastic processing, the plastic extruder is widely used in the continuous production of pipes, plates, profiles and various shaped plastic parts. Its core working principle is to melt and plasticize the plastic raw material through a heating system, and then continuously convey the molten plastic to the mold cavity by the rotating extrusion action of the screw, so as to finally realize the shaping and extrusion of the material. It is a key equipment supporting the large-scale and efficient production of modern plastic industry.

[0003] In the prior art, relevant practitioners have carried out many researches on the structure optimization of the extruder. For example, the utility model patent with the patent number CN221292213U discloses a "screw extruder for plastic part extrusion". The device simplifies the disassembly and assembly process of the screw by improving the mounting and connecting structure of the extrusion screw, effectively solves the problem of complicated and time-consuming screw disassembly during maintenance of the traditional equipment, and has certain progressiveness in improving the convenience of equipment maintenance.

[0004] However, the above-mentioned traditional extruder and similar equipment still have two key technical shortcomings in actual application, which are difficult to meet the current high-quality production demand:

[0005] Firstly, the energy utilization efficiency is low, and there is a lack of heat recovery mechanism. The plastic extrusion process needs to go through many high-energy consumption links such as raw material preheating, melting and plasticizing, molten material conveying and product extrusion and shaping. A large amount of residual heat is still attached to the surface of the shaped plastic product. The existing equipment generally does not recover this part of the residual heat, which leads to the direct loss of heat to the production environment, resulting in serious waste of energy and indirectly increasing the additional energy consumption of workshop ventilation and cooling.

[0006] Secondly, the raw material pretreatment capacity is missing, and there is no effective screening function. During storage and transportation, plastic raw materials (such as granular materials) are prone to particle agglomeration due to changes in humidity, collision and extrusion, or mixed with large-size impurity particles. The feeding structure of the existing extruder is mostly designed in a straight-through manner, and the raw materials are directly fed into the cylinder without screening. Due to the uneven heating area of large-size agglomerated particles or impurities, it is difficult to fully heat exchange with the heating system in the cylinder and reach the complete plasticization state, which will eventually lead to local non-plasticized white spots, internal micro-cracks or surface concave-convex defects in the extruded product. At the same time, the particles that are not fully plasticized will also affect the flowability of the molten material, resulting in fluctuations in product size accuracy, significantly reducing the mechanical properties (such as tensile strength and impact toughness) of the product, and increasing the rate of defective products, causing the enterprise to suffer double losses of raw material waste and rising production costs.

[0007] Based on the deficiencies of the prior art, it is urgent to develop an energy-saving and environment-friendly plastic extruder integrated with waste heat recovery and raw material screening functions. Through innovative design of the equipment structure, the recycling of product waste heat is realized to reduce energy consumption, and the uniformity of plasticization is ensured through raw material pretreatment to improve product quality, thereby meeting the urgent needs of modern plastic processing industry for efficient, energy-saving and high-quality production. SUMMARY

[0008] The purpose of the present application is to provide an energy-saving and environment-friendly plastic part extruder, which has the advantages of heat recovery function and screening function, solves the problem that the existing plastic extruder cannot recycle the heat carried on the surface of the product during use, and cannot screen the plastic particles in the feeding cylinder.

[0009] To achieve the above purpose, the present application provides the following technical scheme: an energy-saving and environment-friendly plastic part extruder and its method, comprising a frame, a machine cylinder is connected to the top of the frame by bolts, a feeding cylinder is communicated to the left side of the top of the machine cylinder, a speed reducer is connected to the left side of the machine cylinder by bolts, the output end of the speed reducer penetrates into the inner cavity of the machine cylinder and is fixedly connected with a screw rod, front and rear sides of the right side of the machine cylinder are both connected with a support plate by bolts, the opposite side of the support plate is connected with a heat exchange mechanism by penetrating and moving, the heat exchange mechanism comprises a copper pipe, a first bracket is riveted to the top of the support plate, a limiting mechanism is connected to the top of the first bracket by penetrating and screwing, a screening plate is fixedly connected in the inner cavity of the feeding cylinder, stirring mechanisms are riveted to both sides of the inner cavity of the feeding cylinder, the stirring mechanism comprises a horizontal plate, a water tank is connected to the bottom of the frame by bolts, a water pump is connected to the bottom of the front side of the water tank by bolts.

[0010] Preferably, the limiting mechanism comprises a lead screw, the bottom end of the lead screw is movably connected with a second bracket through a bearing, the opposite side of the second bracket is movably connected with a guide roller through a bearing, the front and rear sides of the second bracket are both riveted with guide blocks, the front and rear sides of the inner cavity of the first bracket are both provided with guide grooves, the opposite sides of the guide blocks both extend into the inner cavity of the guide grooves, and the top end of the lead screw is riveted with a hand wheel.

[0011] Preferably, the top of the horizontal plate is connected with a servo motor by bolts, the output end of the servo motor penetrates through the horizontal plate and is fixedly connected with a scraper, and the bottom of the scraper is in contact with the screening plate.

[0012] Preferably, the surface of the copper pipe is movably sleeved with a heat conduction cylinder through a bearing, the front side of the copper pipe is communicated with a one-way valve, the front end of the one-way valve is communicated with a water delivery pipe, the left end of the water delivery pipe is communicated with the water outlet end of the water pump, the rear side of the copper pipe is communicated with a branch pipe, the rear end of the branch pipe is communicated with a water return pipe, and the left end of the water return pipe is communicated with the top of the rear side of the water tank.

[0013] Preferably, the right side of the barrel is bolted with a mold, and the bottom of the frame body is riveted with a bottom plate.

[0014] Preferably, the left side of the front side of the water tank is fixedly connected with a temperature sensor, and the front side of the water tank is respectively communicated with a water adding valve and a drain valve.

[0015] Preferably, the water inlet end of the water pump is communicated with the water tank, and the front side of the water tank is embeddedly installed with a liquid level window.

[0016] Preferably, the left side of the feeding cylinder is communicated with a discharge valve, and the screening plate is designed in a conical shape.

[0017] A method for using an energy-saving and environment-friendly plastic part extruder, comprising the following steps:

[0018] A: plastic particles are transported to the feeding cylinder, the screening plate screens larger particles, qualified particles enter the inside of the barrel, and the reduction motor rotates to drive the screw to rotate, and the mold extrudes and forms the material;

[0019] B: the formed plastic part moves to the surface of the heat conducting cylinder, then the hand wheel is rotated, at this time, the heat conducting cylinder moves downward to limit the plastic part, so that the bottom of the plastic part contacts the heat conducting cylinder;

[0020] C: an appropriate amount of water is added to the inner cavity of the water tank, the water pump operates to transport the water to the inside of the copper pipe through the water delivery pipe, the heat on the surface of the plastic part is transferred to the heat conducting cylinder, the heat conducting cylinder transfers the heat to the water in the copper pipe, so that the water is heated, and the heated water is transported to the inner cavity of the water tank through the backwater pipe, and the heat recovery operation is completed.

[0021] Compared with the prior art, the method has the following beneficial effects:

[0022] 1、The heat recovery function is realized through the cooperation of the heat exchange mechanism, the copper pipe, the first support and the limiting mechanism, an appropriate amount of water is added to the inner cavity of the water tank, the water pump operates to transport the water to the inside of the copper pipe through the water delivery pipe, the heat on the surface of the plastic part is transferred to the heat conducting cylinder, the heat conducting cylinder transfers the heat to the water in the copper pipe, so that the water is heated, and the heated water is transported to the inner cavity of the water tank through the backwater pipe, and the heat recovery operation is completed.

[0023] 2、The screening function is realized through the cooperation of the feeding cylinder, the screening plate and the stirring mechanism, the output end of the servo motor drives the scraper to rotate, the plastic particles are transported to the inner cavity of the feeding cylinder, the screening plate filters the particles, the qualified particles fall to the bottom of the screening plate, the larger particles remain on the top of the screening plate, after the feeding is completed, the discharge valve is opened, and the unqualified particles are discharged. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a perspective view of the structure of the application;

[0025] Figure 2 It is a perspective view of the screw structure of the application;

[0026] Figure 3 It is a perspective view of the structure of the application;

[0027] Figure 4 It is a perspective view of the structure of the application;

[0028] Figure 5 It is a perspective view of the heat exchange mechanism of the application.

[0029] In the figure: 1, frame; 2, barrel; 3, feed cylinder; 4, speed reducer; 5, screw; 6, support plate; 7, heat exchange mechanism; 8, copper pipe; 9, first support; 10, limiting mechanism; 11, screening plate; 12, stirring mechanism; 13, cross plate; 14, water tank; 15, water pump; 16, lead screw; 17, second support; 18, guide roller; 19, guide block; 20, guide groove; 21, hand wheel; 22, servo motor; 23, scraper; 24, heat conduction cylinder; 25, check valve; 26, water delivery pipe; 27, branch pipe; 28, backwater pipe; 29, mold; 30, temperature sensor; 31, water filling valve; 32, drain valve; 33, discharge valve. DETAILED DESCRIPTION

[0030] Please refer to Figures 1-5 An energy-saving and environment-friendly plastic part extruder, comprising a frame 1, a barrel 2 is connected to the top of the frame 1 by bolts, a feed cylinder 3 is communicated to the left top of the barrel 2, a speed reducer 4 is connected to the left side of the barrel 2 by bolts, the output end of the speed reducer 4 penetrates into the inner cavity of the barrel 2 and is fixedly connected with a screw 5, the front side and the rear side of the right side of the barrel 2 are both connected with a support plate 6 by bolts, the opposite side of the support plate 6 is connected with a heat exchange mechanism 7 by penetrating and moving, the heat exchange mechanism 7 comprises a copper pipe 8, a first support 9 is riveted to the top of the support plate 6, a limiting mechanism 10 is connected to the top of the first support 9 by penetrating and threading, a screening plate 11 is fixedly connected in the inner cavity of the feed cylinder 3, a stirring mechanism 12 is riveted to the two sides of the inner cavity of the feed cylinder 3, the stirring mechanism 12 comprises a cross plate 13, a water tank 14 is connected to the bottom of the inner cavity of the frame 1 by bolts, a water pump 15 is connected to the bottom of the front side of the water tank 14 by bolts.

[0031] Please refer to Figure 1 and Figure 4The limiting mechanism 10 comprises a lead screw 16, the bottom end of the lead screw 16 is movably connected with a second support 17 through a bearing, the opposite side of the second support 17 is movably connected with a guide roller 18 through a bearing, the front side and the back side of the second support 17 are riveted with guide blocks 19, the front side and the back side of the inner cavity of the first support 9 are provided with guide grooves 20, the guide blocks 19 and the guide grooves 20 can guide the second support 17, so that the second support 17 moves more stably, the opposite side of the guide block 19 extends to the inner cavity of the guide groove 20, the top end of the lead screw 16 is riveted with a hand wheel 21, the hand wheel 21 can rotate the lead screw 16.

[0032] Please refer to Figure 1 and Figure 3 The top of the cross plate 13 is connected with a servo motor 22 through bolts, the output end of the servo motor 22 penetrates through the cross plate 13 and is fixedly connected with a scraper 23, the scraper 23 can stir the plastic particles, which is convenient for subsequent screening work, and the bottom of the scraper 23 is in contact with the screening plate 11.

[0033] Please refer to Figure 1 and Figure 5 The surface of the copper pipe 8 is movably sleeved with a heat conduction cylinder 24 through a bearing, the front side of the copper pipe 8 is communicated with a one-way valve 25, the one-way valve 25 can avoid backflow of water, the front end of the one-way valve 25 is communicated with a water delivery pipe 26, the left end of the water delivery pipe 26 is communicated with the water outlet end of the water pump 15, the back side of the copper pipe 8 is communicated with a branch pipe 27, the back end of the branch pipe 27 is communicated with a backwater pipe 28, the backwater pipe 28 can make the heated water flow back to the inner cavity of the water tank 14, and the left end of the backwater pipe 28 is communicated with the top of the back side of the water tank 14.

[0034] Please refer to Figure 1 The right side of the machine barrel 2 is connected with a mold 29 through bolts, and the bottom of the frame body 1 is riveted with a bottom plate, the bottom plate can support the frame body 1.

[0035] Please refer to Figure 1 The left side of the front side of the water tank 14 penetrates and is fixedly connected with a temperature sensor 30, the temperature sensor 30 can monitor the water temperature in real time, when the water temperature reaches a suitable temperature, the drain valve 32 is opened to discharge and collect the hot water, then the water tank 14 is added with cool water through the water adding valve 31, and the front side of the water tank 14 is respectively communicated with the water adding valve 31 and the drain valve 32.

[0036] Please refer to Figure 1 The water inlet end of the water pump 15 is communicated with the water tank 14, and the front side of the water tank 14 is embeddedly installed with a liquid level window, the liquid level window can observe the liquid level.

[0037] Please refer to Figure 1 andFigure 3 The left side of the feeding cylinder 3 is communicated with a discharge valve 33, and the discharge valve 33 is arranged to discharge unqualified plastic particles.

[0038] The use method of the energy-saving and environment-friendly plastic part extruder comprises the following steps:

[0039] A: The plastic particles are conveyed to the feeding cylinder 3, the screening plate 11 screens the larger particles, the output end of the servo motor 22 drives the scraper 23 to rotate, the scraper 23 stirs the plastic particles to improve the screening effect, the qualified particles fall to the bottom of the screening plate 11, and the larger particles remain at the top of the screening plate 11; after the feeding is completed, the discharge valve 33 is opened to discharge the unqualified particles, and the qualified particles enter the inner barrel 2, the reduction motor 4 rotates to drive the screw 5 to rotate, and the heating assembly in the inner barrel 2 heats and processes the plastic particles, and the mold 29 extrudes and forms the material;

[0040] B: The formed plastic part moves to the surface of the heat conduction cylinder 24, and then the hand wheel 21 is rotated, the hand wheel 21 drives the lead screw 16 to rotate, the lead screw 16 is connected with the first support 9 through threads to move the lead screw 16 downward, the lead screw 16 drives the second support 17 to move downward, the second support 17 drives the heat conduction cylinder 24 to move downward, the heat conduction cylinder 24 limits the plastic part, and the bottom of the plastic part contacts the heat conduction cylinder 24;

[0041] C: The water tank 14 is added with appropriate water through the water adding valve 31, the water pump 15 operates to convey the water to the inside of the copper pipe 8 through the water conveying pipe 26, the heat on the surface of the plastic part is transferred to the heat conduction cylinder 24, the heat conduction cylinder 24 transfers the heat to the water in the copper pipe 8, thereby heating the water, and the heated water is conveyed to the inner cavity of the water tank 14 through the water return pipe 28, and the heat recovery operation is completed.

[0042] In summary: the energy-saving and environment-friendly plastic part extruder and the method thereof solve the problems that the existing plastic extruder cannot recycle the heat carried on the surface of the product and cannot screen and process the plastic particles in the feeding cylinder during use by cooperation of the heat exchange mechanism 7, the copper pipe 8, the first support 9, the limiting mechanism 10, the feeding cylinder 3, the screening plate 11 and the stirring mechanism 12.

Claims

1. An energy-saving and environmentally friendly plastic parts extruder, comprising a frame (1), characterized in that: The top of the frame (1) is connected to a cylinder (2). A feed cylinder (3) is connected to the left side of the top of the cylinder (2). A geared motor (4) is connected to the left side of the cylinder (2). The output end of the geared motor (4) passes through the inner cavity of the cylinder (2) and is fixedly connected to a screw (5). Support plates (6) are connected to the front and rear sides of the right side of the cylinder (2). A heat exchange mechanism (7) is movably connected to the opposite side of the support plate (6). The heat exchange mechanism (7) includes a copper tube (8). The top of the support plate (6) is fixedly connected to a first bracket (9), and the top of the first bracket (9) is threadedly connected to a limit mechanism (10). The inner cavity of the feed cylinder (3) is fixedly connected to a screening plate (11). The two sides of the inner cavity of the feed cylinder (3) are connected to an agitation mechanism (12). The agitation mechanism (12) includes a horizontal plate (13). The bottom of the inner cavity of the frame (1) is connected to a water tank (14), and the bottom of the front side of the water tank (14) is connected to a water pump (15).

2. The energy-saving and environmentally friendly plastic parts extruder according to claim 1, characterized in that: The limiting mechanism (10) includes a lead screw (16), the bottom end of which is movably connected to a second bracket (17), and the opposite side of the second bracket (17) is movably connected to a guide roller (18). The front and rear sides of the second bracket (17) are fixedly connected to guide blocks (19). The front and rear sides of the inner cavity of the first bracket (9) are provided with guide grooves (20). The opposite side of the guide blocks (19) extends into the inner cavity of the guide grooves (20). The top end of the lead screw (16) is fixedly connected to a handwheel (21).

3. The energy-saving and environmentally friendly plastic parts extruder according to claim 1, characterized in that: A servo motor (22) is connected to the top of the horizontal plate (13). The output end of the servo motor (22) passes through the horizontal plate (13) and is fixedly connected to a scraper (23). The bottom of the scraper (23) is in contact with the screening plate (11).

4. The energy-saving and environmentally friendly plastic parts extruder according to claim 1, characterized in that: A heat-conducting cylinder (24) is movably sleeved on the surface of the copper pipe (8). A one-way valve (25) is connected to the front side of the copper pipe (8). A water supply pipe (26) is connected to the front end of the one-way valve (25). The left end of the water supply pipe (26) is connected to the outlet end of the water pump (15). A branch pipe (27) is connected to the rear side of the copper pipe (8). A return water pipe (28) is connected to the rear end of the branch pipe (27). The left end of the return water pipe (28) is connected to the top of the rear side of the water tank (14).

5. The energy-saving and environmentally friendly plastic parts extruder according to claim 1, characterized in that: A mold (29) is connected to the right side of the barrel (2), and a base plate is fixedly connected to the bottom of the frame (1).

6. The energy-saving and environmentally friendly plastic parts extruder according to claim 1, characterized in that: A temperature sensor (30) is fixedly connected through the left side of the front of the water tank (14), and a water inlet valve (31) and a drain valve (32) are respectively connected to the front of the water tank (14).

7. The energy-saving and environmentally friendly plastic parts extruder according to claim 1, characterized in that: The water pump (15) has its inlet end connected to the water tank (14), and a liquid level window is installed on the front side of the water tank (14).

8. The energy-saving and environmentally friendly plastic parts extruder according to claim 1, characterized in that: The left side of the feed cylinder (3) is connected to a discharge valve (33), and the screening plate (11) is a conical design.

9. The method of using an energy-saving and environmentally friendly plastic parts extruder according to any one of claims 1-8, characterized in that... Includes the following steps: A: The plastic granules are conveyed to the feed cylinder (3), the screening plate (11) screens the larger granules, and the qualified granules enter the machine cylinder (2). The geared motor (4) drives the screw (5) to rotate, and the mold (29) extrudes and shapes the material. B: The molded plastic part moves to the surface of the heat-conducting cylinder (24), and then the handwheel (21) is rotated. At this time, the heat-conducting cylinder (24) moves downward to limit the plastic part, so that the bottom of the plastic part contacts the heat-conducting cylinder (24). C: Add an appropriate amount of water to the inner cavity of the water tank (14). The water pump (15) operates to transport the water through the water pipe (26) to the inside of the copper pipe (8). The heat on the surface of the plastic part is transferred to the heat conduction cylinder (24). The heat conduction cylinder (24) transfers the heat to the water inside the copper pipe (8), thereby heating the water. The heated water is then transported to the inner cavity of the water tank (14) through the return water pipe (28) to complete the heat recovery operation.

Images