Injection molding machine for recycling plastic waste

Abstract

The injection molding machine comprises an injection molding base table and a feeding table fixedly installed on one side of the injection molding base table, a heater is fixedly installed on one side of the upper portion of the feeding table, and a fixed mold table fixedly connected with the injection molding base table is arranged on the other side of the heater. When a plurality of injection molding heads on a mold table are all pressed in place by a spring rod, a gear shaft is driven to rotate through the operation of a double-shaft servo motor, so that a heat insulation belt extends upwards from the interior of an equipment box to the position between a heater and a charging barrel, the charging barrel is coated to block heat transfer, and meanwhile, the charging barrel is subjected to heat preservation; according to the injection molding device, the plastic melt in the charging barrel is prevented from being continuously heated and dried when the plastic mold is cooled and demolded, meanwhile, the situation that heating operation on the injection molding melt needs to be stopped after injection molding filling in the mold is completed is improved, energy consumption is reduced, and the injection molding efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of injection molding machines, and particularly to an injection molding machine for recycling plastic waste. Background Art

[0002] Plastic products are indispensable in life and are widely used in all aspects of life. However, after the use of plastic products, the recycling of plastic waste is a difficult problem. An injection molding machine is a device used to manufacture plastic products. It can first process plastic waste into plastic pellets, heat and melt the plastic pellets, and then inject the molten plastic into a mold. After the plastic cools in the mold, a formed plastic product is formed, so that the plastic can be reused. Injection molding machines are widely used in the automotive industry, electronics industry, home appliance manufacturing, daily necessities production and other fields, and can produce plastic products of various shapes and sizes, such as plastic containers, parts, shells, etc. The use of injection molding machines can achieve advantages such as mass production, high production efficiency, low cost, and stable product quality, and is one of the key equipment indispensable in the production process of plastic products.

[0003] Since it is necessary to stop heating the molten material in the barrel to avoid long-term high-temperature drying of the molten material in the barrel after injection filling, however, during the process of product forming and demolding in the mold, the heating stop time is relatively long when injection molding is paused, resulting in a gradual decrease in the temperature of the barrel and the molten material therein, and the molten material gradually solidifies, and the fluidity is significantly reduced. When heating is restarted, not only does it need to reheat the barrel and the internal molten material to an appropriate temperature, but also it needs to melt the gradually solidified plastic molten material with weakened fluidity to improve its fluidity, thereby increasing the consumption of time and energy. Summary of the Invention

[0004] The purpose of the present invention is to provide an injection molding machine for recycling plastic waste, so as to solve the problem proposed in the above background art that when the product in the mold stops injection molding during forming and demolding, the heating stop time is relatively long, the temperature of the barrel and the molten material therein will gradually decrease and gradually solidify, and when reheating, not only does it need to heat the barrel to restore the temperature, but also it needs to remelt the gradually solidified plastic, thereby consuming more time and energy.

[0005] To achieve the above purpose, the present invention provides the following technical solutions: An injection molding machine for the recycling of plastic waste, comprising an injection molding base platform and a feeding platform fixedly installed on one side of the injection molding base platform. Above one side of the feeding platform, a heater is fixedly installed, and on the other side of the heater, a fixed mold platform fixedly connected to the injection molding base platform is provided. Below the heater, there is an equipment box, and the equipment box is fixedly fitted and installed in the middle of the fixed mold platform and the feeding platform. Inside the feeding platform, a centrifugal pump is fixedly installed, and a transmission rod is provided in the middle of the centrifugal pump. Above the inner side of the feeding platform, a double-shaft servo motor is fitted and installed, and the transmission rod is in transmission connection with the double-shaft servo motor. On one side of the equipment box, a transmission box is fixedly installed, and the double-shaft servo motor is in transmission connection with the transmission box; Inside the equipment box, two gear shafts are fitted and movably installed, and the gear shafts are in transmission connection with the transmission box. Below the gear shafts, there are two cooling boxes, and the cooling boxes are fitted and connected to the equipment box. A heat insulation belt is provided in the middle of the cooling boxes, and the heat insulation belt is arranged in a meshing connection with the gear shafts; On one side of the fixed mold platform, a mold plate is fitted and installed, and a mold table is fixedly provided on the mold plate. Inside the mold table, a plurality of injection heads are fitted and installed. On one side of the injection heads, connecting shafts are installed in a surrounding manner, and on one side of the connecting shafts, an adjusting plate is fixedly connected. On the outer side of the adjusting plate, spring rods are provided, and the spring rods are fixedly installed in an equidistant surrounding manner on one side of the injection heads. On the other side of the spring rods, a pressing plate is fixedly installed, and the adjusting plate penetrates through the inner side of the pressing plate; Inside the inner side of the feeding platform, a barrel is fitted and installed, and the barrel is arranged inside the heater. Inside the barrel, a threaded extrusion rod is fitted and movably installed. On one side of the threaded extrusion rod, a sub-conduit in through connection with a plurality of injection heads is fitted and provided, and the sub-conduit is fixedly connected to the fixed mold platform. On one side of the sub-conduit, a docking plug rod penetrating through the inner side of the threaded extrusion rod is fixedly installed. On the outer side of the docking plug rod, an extrusion port is provided, and the extrusion port is in through connection with the barrel.

[0006] In the above solution, preferably: Above the feeding platform, a feeding barrel is fixedly installed, and the feeding barrel is in through connection with one side of the barrel. On the other side above the injection molding base platform, a fixing plate is fixedly installed. On one side of the fixing plate, an air pump is fixedly installed.

[0007] In the above solution, preferably: On the other side of the fixing plate, a moving mold platform is provided. At the four corners between the fixing plate and the moving mold platform, balance sliding rods are respectively installed. At the symmetric center of the balance sliding rods, telescopic air rods connecting the fixing plate and the moving mold platform are fitted and installed.

[0008] In the above solution, preferably: On one side of both the fixed mold platform and the moving mold platform, mold plates are fitted and installed, and a diversion groove is provided inside the mold plates. On both sides of the mold plates, docking heads are fixedly connected, and the docking heads are in through connection with the diversion groove inside the mold plates.

[0009] In the above solution, preferably: A plurality of telescopic ejector rods are fitted and movably installed inside the mold table, and the telescopic ejector rods are fixedly connected to the fixed mold table. One side of each of the two cooling boxes is connected through a connecting pipe, and a multi-way pipe is fixedly connected through one side of the connecting pipe.

[0010] In the above solution, preferably: Docking holes are provided at the four corners of the mold plate on the fixed mold table. Docking rods are fixedly installed at the four corners of the mold plate on the moving mold table, and the docking rods and the docking holes are arranged for alignment and fitting. A plastic mold for injection molding is provided inside the mold plates on the fixed mold table and the moving mold table.

[0011] In the above solution, preferably: One side of the screw extrusion rod is hollow, and guiding grooves are equidistantly arranged around the outside of the hollow screw extrusion rod. An internal thread fixedly connected to the screw extrusion rod is provided inside the guiding grooves, and the docking plug rod penetrates through the inside of the internal thread. A transmission head is provided on one side of the screw extrusion rod, and the transmission head penetrates through one side of the barrel and is fitted and movably installed inside the feeding table. An emission outlet penetrating through the screw extrusion rod is provided on one side of the internal thread.

[0012] In the above solution, preferably: Tooth grooves meshing with the gear shaft are provided on one side of each heat insulation belt. The double-shaft servo motor and the spring rod are connected by telecommunications, and a torsion spring for adjusting the opening and resetting of the adjusting plate is provided in the connecting shaft.

[0013] The present invention provides an injection molding machine for recycling plastic waste, having the following technical key points and beneficial effects: 1. By designing devices such as a double-shaft servo motor, a heat insulation belt, and a spring rod, when multiple injection heads on the mold table are all pressed in place by the spring rod, at this time, the operation of the double-shaft servo motor drives the gear shaft to rotate, so that the heat insulation belt extends upward from the equipment box to between the heater and the barrel, and wraps the barrel to block heat transfer, while keeping the barrel warm. Furthermore, when the plastic mold is cooled and demolded, it prevents the plastic melt in the barrel from being continuously heated and dried, and at the same time improves the situation that after the injection filling in the mold is completed, it is necessary to stop heating the injection melt. Furthermore, it avoids the situation that the heater is restarted to heat the barrel to restore the temperature and remelt the gradually solidified plastic, thereby reducing energy consumption and improving the injection molding efficiency.

[0014] 2. The present invention designs devices such as a biaxial servo motor, a cooling box, and a spring rod. After the plastic mold is taken out from the mold plate, the biaxial servo motor performs a reverse rotation operation. When the coolant is circulated and transported in the cooling box by a centrifugal pump, the coolant for cooling the plastic mold is transported to one side of the cooling box for cooling through a connecting pipe on one side, and the coolant further cooled by the other side of the cooling box is transported through the connecting pipe on the other side to the diversion groove in the mold plate to perform circulating cooling on the plastic mold, thereby improving the cooling efficiency of the plastic mold.

[0015] 3. The present invention designs devices such as a guiding groove, a discharge outlet, and an internal thread. Through the operation of the heater, heat transfer is performed on the barrel, and then the plastic particles transported by the screw extruder in the barrel are heated and melted. At this time, through the rotation of the screw extruder, the guiding groove scoops the plastic melt with relatively low fluidity in the inner circle into the inside of one side of the screw extruder, and then the plastic melt with relatively low fluidity on one side inside the screw extruder is discharged from the discharge outlet again for reflux heating, thereby improving the injection efficiency. The plastic melt with relatively high fluidity in the outer circle enters the sub-conduit through the extrusion port, and the sub-conduit transports the plastic melt with relatively high fluidity to the injection heads respectively for injection use, so as to facilitate flow and filling for molding in the mold plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0017] Figure 2 It is a schematic diagram of a partial structure of the mold plate in the present invention.

[0018] Figure 3 It is a schematic diagram of a partial structure of the fixed mold table in the present invention.

[0019] Figure 4 It is a schematic diagram of a partial structure of the screw extruder in the present invention.

[0020] Figure 5 It is a schematic diagram of a partial structure of the mold table in the present invention.

[0021] Figure 6 It is a schematic diagram of a cross-sectional structure of the screw extruder in the present invention.

[0022] Figure 7 It is a schematic diagram of a partial structure disassembly of the barrel in the present invention.

[0023] Figure 8 It is a schematic diagram of a partial structure of the internal thread in the present invention.

[0024] Figure 9 It is a schematic diagram of a partial structure of the injection head in the present invention.

[0025] Figure 10 For the present invention Figure 3 Schematic diagram of enlarged partial structure at position A in the present invention.

[0026] Figure 11 For the present invention Figure 9 Schematic diagram of enlarged partial structure at position B in the present invention.

[0027] In the figure: 1, injection molding base; 101, fixed plate; 2, feeding table; 201, centrifugal pump; 202, dual-axis servo motor; 3, feeding cylinder; 4, heater; 5, equipment box; 501, cooling box; 502, gear shaft; 503, heat insulation belt; 504, transmission box; 6, fixed mold table; 601, telescopic ejector rod; 7, moving mold table; 8, balance slide bar; 9, air pump; 10, telescopic air rod; 11, mold plate; 1101, docking rod; 1102, mold table; 1103, docking hole; 12, barrel; 13, connecting pipe; 1301, multi-way pipe; 14, docking head; 15, plastic mold; 16, injection head; 1601, extrusion plate; 1602, spring rod; 1603, adjusting plate; 1604, connecting shaft; 17, threaded extrusion rod; 1701, guiding groove; 1702, discharge outlet; 1703, transmission head; 1704, internal thread; 18, sub-conduit; 1801, docking plug; 1802, extrusion port. Specific embodiments

[0028] 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 creative efforts shall fall within the protection scope of the present invention.

[0029] Please refer to Figures 1 to 11 , the present invention provides a technical solution for an injection molding machine for plastic waste recycling and utilization: An injection molding machine for plastic waste recycling and utilization includes an injection molding base 1 and a feeding table 2 fixedly installed on one side of the injection molding base 1. A heater 4 is fixedly installed on the upper side of the feeding table 2, and a fixed mold table 6 fixedly connected to the injection molding base 1 is provided on the other side of the heater 4. An equipment box 5 is provided below the heater 4, and the equipment box 5 is fixedly and fittingly installed in the middle of the fixed mold table 6 and the feeding table 2. A centrifugal pump 201 is fixedly installed inside the feeding table 2, and a transmission rod is provided in the middle of the centrifugal pump 201. A dual-axis servo motor 202 is fittingly installed above the inner side of the feeding table 2, and the transmission rod is in transmission connection with the dual-axis servo motor 202. A transmission box 504 is fixedly installed on one side of the equipment box 5, and the dual-axis servo motor 202 is in transmission connection with the transmission box 504; As an embodiment of the present invention, as Figure 3, Figure 9 , Figure 10 and Figure 11 As shown, a mold plate 11 is embedded and installed on one side of the fixed mold table 6, and a mold table 1102 is fixedly installed on the mold plate 11, and a plurality of injection heads 16 are embedded and installed on the inner side of the mold table 1102, a connecting shaft 1604 is installed around one side of the injection head 16, and an adjusting plate 1603 is fixedly connected to one side of the connecting shaft 1604, a spring rod 1602 is provided on the outer side of the adjusting plate 1603, and the spring rod 1602 is fixedly installed around one side of the injection head 16 at an equal distance, an extrusion plate 1601 is fixedly installed on the other side of the spring rod 1602, and the adjusting plate 1603 is penetrated and arranged on the inner side of the extrusion plate 1601, the dual-axis servo motor 202 and the spring rod 1602 are arranged in telecommunication connection, and a torsion spring for opening and resetting the adjusting plate 1603 is provided in the connecting shaft 1604; During operation, the mold plates 11 on the fixed mold table 6 and the movable mold table 7 are docked and fitted, and a mold table 1102 with a specific shape is used to perform injection molding in the cavity after the mold plates 11 are fitted to form a plastic mold 15. During the injection molding process, the plastic melt is injected into the cavity by the injection molding head 16 on the mold table 1102. When the continuous injection molding of the injection molding head 16 fills the cavity with the plastic melt, the continuously injected plastic melt generates pressure on the extrusion plate 1601, thereby pushing the extrusion plate 1601 to move downward on the spring rod 1602. At this time, the opening of the adjustment plate 1603 gradually becomes smaller when the extrusion plate 1601 is pressed downward. When the extrusion plate 1601 is pressed into place by the spring rod 1602, the injection molding operation of the injection molding head 16 is stopped. At this time, the adjustment plate 1603 is squeezed by the extrusion plate 1601 to a closed state, thereby avoiding To prevent the highly fluid plastic melt from producing a water hammer effect when the feeding is stopped, when the multiple injection heads 16 on the mold table 1102 are pressed into place by the spring rod 1602, a current path is formed between the spring rod 1602 and the dual-axis servo motor 202, and current and signals are transmitted to the dual-axis servo motor 202. At this time, the dual-axis servo motor 202 starts to rotate in a directional manner after receiving the current and signals. When the plastic mold 15 is taken out from the mold plate 11, since a torsion spring is provided in the connecting shaft 1604, when the extrusion plate 1601 is pushed up by the spring rod 1602, the opening of the adjustment plate 1603 through the connecting shaft 1604 gradually becomes larger, and the path for the spring rod 1602 to transmit current and signals to the dual-axis servo motor 202 is interrupted. When the parallel current and signal path is interrupted, the dual-axis servo motor 202 performs a reverse rotation operation.

[0030] As an embodiment of the present invention, Figure 2 , Figure 3 , Figure 4 and 10As shown in the figure, two gear shafts 502 are fitted and movably installed inside the equipment box 5, and the gear shafts 502 are in transmission connection with the transmission box 504. Below the gear shafts 502, there are two cooling boxes 501, and the cooling boxes 501 are fitted and connected with the equipment box 5. A heat insulation belt 503 is provided in the middle of the cooling box 501, and the heat insulation belt 503 is meshed and connected with the gear shafts 502. Tooth grooves meshed with the gear shafts 502 are provided on one side of the heat insulation belt 503. On one side of each of the two cooling boxes 501, a connecting pipe 13 is connected through, and a multi-way pipe 1301 is fixedly connected through on one side of each of the connecting pipes 13; During operation, the operation of the double-shaft servo motor 202 provides power for the transmission box 504, and the power is transmitted to the two gear shafts 502 through the transmission box 504. Since the heat insulation belt 503 is meshed and connected with the gear shafts 502 through the tooth grooves, when the double-shaft servo motor 202 operates, the gear shafts 502 are driven to rotate, so that the heat insulation belt 503 extends upward from the equipment box 5 between the heater 4 and the barrel 12 and wraps the barrel 12 to block the heat transfer. Secondly, the double-shaft servo motor 202 provides the operating power for the centrifugal pump 201 through the transmission rod. The operation of the centrifugal pump 201 circulates and conveys the coolant in the two cooling boxes 501, and the heat is conveyed to the heater 4 through the heat dissipation pipe in the cooling box 501, so as to perform heat exchange when the cooling box 501 refrigerates and reduce the energy consumption when the heater 4 heats the plastic particles in the barrel 12; When the coolant is circulated and conveyed in the cooling box 501 by the centrifugal pump 201, the coolant for cooling and circulating the plastic mold 15 is conveyed to one side of the cooling box 501 through the connecting pipe 13 on one side for cooling, and the coolant further cooled by the other cooling box 501 is conveyed through the connecting pipe 13 on the other side to the diversion groove in the mold plate 11 to circulate and cool the plastic mold 15, so as to realize the conversion and utilization of heat energy and improve the cooling efficiency of the plastic mold 15. When the plastic mold 15 is taken out of the mold plate 11 and injection molding is performed again, the double-shaft servo motor 202 performs a reverse rotation operation to retract the heat insulation belt 503 into the equipment box 5 to cancel the wrapping of the barrel 12, and then the operation of the feeding table 2 makes the screw extrusion rod 17 rotate in the barrel 12 to melt and convey the plastic particles.

[0031] As an embodiment of the present invention, as Figures 4 to 8As shown in the figure, a barrel 12 is fitted and installed inside the feeding table 2, and the barrel 12 is arranged inside the heater 4. A screw extrusion rod 17 is fitted and movably installed inside the barrel 12. A sub-conduit 18 that is connected to a plurality of injection heads 16 in a penetrating manner is fitted on one side of the screw extrusion rod 17. The sub-conduit 18 is fixedly connected to the fixed mold table 6. A docking plug 1801 that penetrates the inside of the screw extrusion rod 17 is fixedly installed on one side of the sub-conduit 18. An extrusion port 1802 is arranged on the outer side of the docking plug 1801, and the extrusion port 1802 is connected to the barrel 12 in a penetrating manner; One side of the screw extrusion rod 17 is hollow, and guide grooves 1701 are equidistantly arranged around the outer side of the hollow screw extrusion rod 17. An internal thread 1704 fixedly connected to the screw extrusion rod 17 is arranged inside the guide grooves 1701. The docking plug 1801 penetrates the inside of the internal thread 1704. A transmission head 1703 is arranged on one side of the screw extrusion rod 17. The transmission head 1703 penetrates one side of the barrel 12 and is fitted and movably installed inside the feeding table 2. A discharge port 1702 that penetrates the screw extrusion rod 17 is arranged on one side of the internal thread 1704; During operation, the feeding table 2 controls the conveying operation of the screw extrusion rod 17 for plastic particles and plastic melt. When the plastic particles are being conveyed by the screw extrusion rod 17, heat transfer is performed on the barrel 12 through the operation of the heater 4, and then the plastic particles conveyed by the screw extrusion rod 17 inside the barrel 12 are heated and melted. Since the melt closer to the heating part in the barrel 12 has a higher temperature than the melt farther from the heating part, the melt temperature near the heating part of the barrel 12 is relatively high and the fluidity is relatively strong, while the plastic melt temperature inside the inner circle of the barrel 12 is relatively low and the fluidity is relatively weak. At this time, by rotating the screw extrusion rod 17, the guide grooves 1701 scoop the plastic melt with relatively low fluidity inside the inner circle into the inside of one side of the screw extrusion rod 17. Since the docking plug 1801 penetrates the inside of one side of the screw extrusion rod 17, and the internal thread 1704 thread inside one side of the screw extrusion rod 17 is opposite to the thread on the outer side of the screw extrusion rod 17, the plastic melt with relatively low fluidity inside one side of the screw extrusion rod 17 is discharged from the discharge port 1702 again for reflux heating, thereby improving the injection efficiency. The plastic melt with relatively high fluidity on the outer circle enters the sub-conduit 18 through the extrusion port 1802, and the sub-conduit 18 conveys the plastic melt with relatively high fluidity to the injection heads 16 respectively for injection use, thereby improving the fluidity of the plastic melt to facilitate flow filling and molding inside the mold plate 11.

[0032] As an embodiment of the present invention, as Figure 1 and Figure 2As shown, a feed barrel 3 is fixedly installed above the feed table 2, and the feed barrel 3 is connected to one side of the barrel 12, a fixed plate 101 is fixedly installed on the other side of the top of the injection molding base 1, and an air pump 9 is fixedly installed on one side of the fixed plate 101; a movable mold table 7 is provided on the other side of the fixed plate 101, and balance slide bars 8 are respectively installed at the four corners between the fixed plate 101 and the movable mold table 7, and a telescopic air rod 10 with the fixed plate 101 and the movable mold table 7 is embedded in the symmetric center of the balance slide bar 8; During operation, the feed barrel 3 is installed and used through the feed table 2. The installation of the feed barrel 3 facilitates the transportation of plastic particles into the barrel 12, and then the plastic particles are heated to a molten state by the heater 4 in the barrel 12. Secondly, the fixed plate 101 is installed on the injection molding base 1, and the air pump 9 is installed on the fixed plate 101. Since a balancing slide bar 8 is provided between the fixed plate 101 and the movable mold table 7, and a telescopic gas rod 10 is provided in the center, the telescopic gas rod 10 is telescoped through the operation of the air pump 9 to push the movable mold table 7 to move, thereby realizing the opening and closing operation of the fixed mold table 6 and the movable mold table 7, so that the plastic mold 15 can be injection molded in the mold plate 11 in the fixed mold table 6 and the movable mold table 7. Secondly, the balancing slide bar 8 is used to improve the stability during the movement when the movable mold table 7 moves.

[0033] As an embodiment of the present invention, Figures 1 to 5 As shown, a mold plate 11 is installed on one side of the fixed mold platform 6 and the movable mold platform 7, and a guide groove is provided inside the mold plate 11. Both sides of the mold plate 11 are fixedly connected with docking joints 14, and the docking joints 14 are connected with the guide groove in the mold plate 11. The four corners of the mold plate 11 on the fixed mold platform 6 are provided with docking holes 1103, and the four corners of the mold plate 11 on the movable mold platform 7 are fixedly installed with docking rods 1101, and the docking rods 1101 and the docking holes 1103 are arranged in a counter-positioned and embedded arrangement. The inner side of the mold plate 11 on the fixed mold platform 6 and the movable mold platform 7 is provided with an injection-molded plastic mold 15, and the inner side of the mold platform 1102 is movably installed with a plurality of telescopic ejector rods 601, and the telescopic ejector rods 601 are all fixedly connected to the fixed mold platform 6; During operation, the moving mold table 7 moves towards the fixed mold table 6 on the injection molding base 1, causing the mold plates 11 to be butted against each other. When butting, through the alignment of the butting rod 1101 and the butting hole 1103, the stability during injection molding after butting is improved. The plastic melt is injected and ejected through the injection head 16 on the mold table 1102, enabling the plastic mold 15 to be filled in the cavity formed after the mold plates 11 are butted against each other, thus completing the injection molding process of the product. Secondly, the docking head 14 is connected to the external connecting pipe and the multi-way pipe 1301, allowing the coolant cooled in the cooling tank 501 to circulate in the flow guide grooves in the mold plate 11. During the injection molding process, the circulating coolant rapidly absorbs the heat of the plastic mold 15 through the flow guide grooves, effectively reducing the injection molding time of the plastic mold 15 and improving production efficiency. When the plastic mold 15 is cooled after molding, through the operation of the telescopic ejector rod 601, the plastic mold 15 is ejected from the cavity of the butted mold plate 11 to complete the demolding of the plastic mold 15 after molding.

[0034] Working principle: The feeding table 2 is used to install and use the feeding cylinder 3. By installing the feeding cylinder 3, it is convenient to convey plastic particles into the cylinder 12, and the plastic particles are heated to a molten state by the heater 4 in the cylinder 12. Secondly, the fixing plate 101 is installed on the injection molding base 1, and the air pump 9 is installed on the fixing plate 101. Through the operation of the air pump 9, the telescopic air rod 10 is telescoped to push the moving mold table 7 to move, thereby realizing the opening and closing operation of the fixed mold table 6 and the moving mold table 7, enabling the plastic mold 15 to be injection molded in the mold plates 11 of the fixed mold table 6 and the moving mold table 7. The plastic melt is injected and ejected through the injection head 16 on the mold table 1102, enabling the plastic mold 15 to be filled in the cavity formed after the mold plates 11 are butted against each other, thus completing the injection molding process of the product. Secondly, the docking head 14 is connected to the external connecting pipe and the multi-way pipe 1301, allowing the coolant cooled in the cooling tank 501 to circulate in the flow guide grooves in the mold plate 11. During the injection molding process, the circulating coolant rapidly absorbs the heat of the plastic mold 15 through the flow guide grooves to cool it into shape. When the plastic mold 15 is cooled after molding, through the operation of the telescopic ejector rod 601, the plastic mold 15 is ejected from the cavity of the butted mold plate 11 to complete the demolding of the plastic mold 15 after molding. During the injection molding process, plastic melt is injected into the cavity through the injection head 16 on the mold table 1102. When the continuous injection of the injection head 16 fills the cavity with plastic melt, the continuously injected plastic melt generates pressure on the extrusion plate 1601, thereby pushing the extrusion plate 1601 to move downward on the spring rod 1602. At this time, when the extrusion plate 1601 moves downward, the opening of the regulating plate 1603 gradually becomes smaller. When the extrusion plate 1601 is pressed down to the position on the spring rod 1602, the injection head 16 stops the injection operation. At this time, the regulating plate 1603 is squeezed by the extrusion plate 1601 to a tendency to close state. When multiple injection heads 16 on the mold table 1102 are all pressed down to the position on the spring rod 1602, at this time, after receiving the current and signal, the dual-axis servo motor 202 starts the directional rotation operation. When the plastic mold 15 is taken out of the mold plate 11, when the spring rod 1602 pushes the extrusion plate 1601 upward, the opening of the regulating plate 1603 gradually becomes larger through the connecting shaft 1604, and at the same time, the dual-axis servo motor 202 performs the reverse rotation operation; The operation of the dual-axis servo motor 202 provides power for the transmission box 504, and the power is transmitted to the two gear shafts 502 through the transmission box 504. When the dual-axis servo motor 202 operates, it drives the gear shaft 502 to rotate, so that the heat insulation belt 503 extends upward from the equipment box 5 between the heater 4 and the barrel 12 and wraps the barrel 12 to block the heat transfer. Secondly, the dual-axis servo motor 202 provides the operating power for the centrifugal pump 201 through the transmission rod. Through the operation of the centrifugal pump 201, the coolant in the two cooling boxes 501 is circulated and transported. The heat is transported to the heater 4 through the heat dissipation pipe in the cooling box 501, and then heat exchange is carried out when the cooling box 501 refrigerates, and the energy consumption during the heating operation of the plastic particles in the barrel 12 by the heater 4 is reduced; When the coolant is circulated and transported in the cooling box 501 by the centrifugal pump 201, the coolant for cooling the plastic mold 15 is transported to one side of the cooling box 501 for cooling through the connecting pipe 13 on one side, and the coolant further cooled by the other cooling box 501 is transported through the connecting pipe 13 on the other side to the diversion groove in the mold plate 11 for circulating cooling of the plastic mold 15, so as to realize the conversion and utilization of heat energy and improve the cooling efficiency of the plastic mold 15. When the plastic mold 15 is taken out of the mold plate 11 and the injection operation is carried out again, the dual-axis servo motor 202 performs the reverse rotation operation to take the heat insulation belt 503 into the equipment box 5 to cancel the wrapping of the barrel 12, and then through the operation of the feeding table 2, the screw extrusion rod 17 rotates in the barrel 12 to melt and transport the plastic particles; The feeding table 2 controls the conveying operation of the screw extrusion rod 17 for plastic particles and plastic melt. When the plastic particles are being conveyed by the screw extrusion rod 17, heat transfer is performed on the barrel 12 through the operation of the heater 4, thereby heating and melting the plastic particles conveyed by the screw extrusion rod 17 in the barrel 12. At this time, through the rotation of the screw extrusion rod 17, the guiding groove 1701 scoops the plastic melt with relatively low fluidity in the inner circle into the inside of one side of the screw extrusion rod 17, and then discharges the plastic melt with relatively low fluidity on one side inside the screw extrusion rod 17 from the discharge outlet 1702 again for reflux heating, thereby improving the injection molding efficiency. The plastic melt with relatively high fluidity in the outer circle enters the sub-conduit 18 through the extrusion outlet 1802, and the sub-conduit 18 conveys the plastic melt with relatively high fluidity to the injection head 16 respectively for injection molding use, so as to flow and fill and form in the mold plate 11.

[0035] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An injection molding machine for recycling plastic waste, comprising an injection molding base and a feed table fixedly mounted on one side of the injection molding base, a heater fixedly mounted on one side of the feed table, a fixed mold table fixedly connected to the injection molding base is provided on the other side of the heater, an equipment box is provided below the heater, and the equipment box is fixedly mounted between the fixed mold table and the feed table, characterized in that: A centrifugal pump is fixedly installed inside the feed table, a transmission rod is provided in the middle of the centrifugal pump, a double-axis servo motor is embedded and installed on the upper inner side of the feed table, the transmission rod is connected to the double-axis servo motor, a transmission box is fixedly installed on one side of the equipment box, and the double-axis servo motor is connected to the transmission box; Two gear shafts are movably installed inside the equipment box, and the gear shafts are drivingly connected to the transmission box. Two cooling boxes are arranged below the gear shafts, and the cooling boxes are engaged with the equipment box. An insulating belt is arranged in the middle of the cooling box, and the insulating belt is meshingly connected with the gear shaft. A mold plate is embedded and installed on one side of the fixed mold table, a mold table is fixedly installed on the mold plate, a plurality of injection heads are embedded and installed on the inner side of the mold table, a connecting shaft is installed around one side of the injection head, an adjustment plate is fixedly connected to one side of the connecting shaft, a spring rod is provided on the outer side of the adjustment plate, the spring rod is fixedly installed around one side of the injection head at an equal distance, an extrusion plate is fixedly installed on the other side of the spring rod, and the adjustment plate is penetrated and arranged on the inner side of the extrusion plate; A barrel is embedded and installed on the inner side of the feed table, and the barrel is arranged on the inner side of the heater. A threaded extrusion rod is movably embedded and installed on the inner side of the barrel. A branch conduit connected with multiple injection molding heads is embedded and installed on one side of the threaded extrusion rod. The branch conduit is fixedly connected to the fixed mold table. A docking rod that passes through the inner side of the threaded extrusion rod is fixedly installed on one side of the branch conduit. An extrusion port is arranged on the outer side of the docking rod, and the extrusion port is connected with the barrel.

2. The injection molding machine for recycling plastic waste according to claim 1, characterized in that: A feed barrel is fixedly installed above the feed platform, and is connected to one side of the barrel through a fixed plate is fixedly installed on the other side above the injection molding base, and an air pump is fixedly installed on one side of the fixed plate.

3. The injection molding machine for recycling plastic waste according to claim 2, characterized in that: A movable die table is arranged on the other side of the fixed plate, and balance slide bars are respectively installed at the four corners between the fixed plate and the movable die table, and a telescopic gas rod with the fixed plate and the movable die table is embedded in the symmetric center of the balance slide bar.

4. The injection molding machine for recycling plastic waste according to claim 1, characterized in that: A mold plate is embedded and installed on one side of the fixed mold table and the movable mold table. A guide groove is arranged inside the mold plate. Both sides of the mold plate are fixedly connected with a butt joint, which is connected with the guide groove in the mold plate.

5. The injection molding machine for recycling plastic waste according to claim 1, characterized in that: A plurality of telescopic ejector rods are movably mounted on the inner side of the mold table, and the telescopic ejector rods are fixedly connected to the fixed mold table. One side of the two cooling boxes is connected through a connecting pipe, and one side of the connecting pipe is fixedly connected through multiple pipes.

6. The injection molding machine for recycling plastic waste according to claim 4, characterized in that: The four corners of the mold plate on the fixed mold table are provided with docking holes, and the four corners of the mold plate on the movable mold table are fixedly installed with docking rods, which are arranged in alignment with the docking holes. The inner sides of the mold plates on the fixed mold table and the movable mold table are provided with injection-molded plastic molds.

7. The injection molding machine for recycling plastic waste according to claim 1, characterized in that: One side of the threaded extrusion rod is hollow, and guide grooves are equidistantly arranged around the outside of the hollow threaded extrusion rod. The inner side of the guide groove is provided with an internal thread fixedly connected to the threaded extrusion rod, and the docking rod passes through the inner side of the internal thread. A transmission head is provided on one side of the threaded extrusion rod, and the transmission head passes through one side of the barrel and is movably installed on the inner side of the feed table. One side of the internal thread is provided with a discharge outlet that passes through the threaded extrusion rod.

8. The injection molding machine for recycling plastic waste according to claim 1, characterized in that: One side of the insulation belt is provided with a tooth groove meshing with the gear shaft, the double-axis servo motor and the spring rod are arranged in telecommunication connection, and a torsion spring for adjusting the plate to be opened and reset is arranged in the connecting shaft.

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