Plastic injection molding equipment and method

Abstract

The invention discloses plastic injection molding equipment and method, and belongs to the technical field of injection molding. Plastic injection molding equipment comprises a workbench with an injection mold assembly, a melting injection pipe and a feeding cylinder, the melting injection pipe is fixedly connected to the workbench, the injection end of the melting injection pipe communicates with the input end of the injection mold assembly, and a spiral lifting mechanism is arranged in the feeding cylinder. The sprayed hot air can help to evaporate moisture on the surfaces of the plastic particles, reduce the moisture content, prevent the moisture-containing plastic from generating vacuum bubbles in a molten state, prevent bubbles or air holes from being formed in the formed plastic tray, and improve the strength of a finished product; and redundant heat in the cooling liquid can be transferred into the feeding barrel to heat air, redundant heat in the injection mold assembly is recycled, waste of heat resources is reduced, and energy consumption of the cooling circulating pump can be reduced.

Description

Technical Field

[0001] The invention relates to the technical field of injection molding, and in particular to a plastic injection molding device and method. Background Art

[0002] Plastic injection molding is a widely used process in plastic manufacturing, which uses hot molten plastic materials to form various plastic products through molds. The advantage of this technology is that it can efficiently and mass-produce parts with complex shapes. It is widely used in electronic products, automobiles, household goods and other fields. With the rise of tea culture and changes in consumer lifestyles, the tea set market continues to grow, and the diversified demand for tea sets has promoted the production of related auxiliary products, including plastic trays for placing and displaying tea sets. Plastic trays are not only light and easy to clean, but also effectively protect ceramic or glass tea sets from breakage.

[0003] As a result, the use of plastics has increased dramatically, and environmental pollution has become more and more serious. The recycling and reuse of waste plastics has gradually become an important issue in the plastic injection molding industry. The recycling of waste plastics not only helps to reduce the demand for new plastic raw materials, but also reduces the cost of raw material procurement and achieves sustainable utilization of resources. Therefore, more and more companies are able to recycle the cleaned polypropylene and polyethylene and crush them into particles, and then use the particles for a second time.

[0004] Due to the increasing demand, the production progress needs to be followed up in a timely manner. In the prior art, the following disadvantages exist in the injection molding process of the plastic tray for displaying tea sets. During the injection molding process, excess water will remain inside the transported plastic, and the plastic with water will produce vacuum bubbles in the molten state, which will form bubbles or pores inside the plastic tray, resulting in reduced strength of the finished product. In addition, during the cooling process, coolant is needed to cool the heat of the plastic material injected into the mold so that the plastic tray is cooled and formed. However, the coolant that absorbs heat will return to the cooling circulation pump for cooling, and the excess heat in the mold cannot be recycled, which not only wastes heat resources but also increases the energy consumption of the cooling circulation pump. Summary of the invention

[0005] The purpose of the present invention is to solve the problem in the prior art that plastics containing moisture will produce vacuum bubbles in a molten state, which will cause bubbles or pores to form inside the plastic pallet, resulting in reduced strength of the finished product and inability to recycle excess heat in the mold, which not only wastes heat resources but also increases the energy consumption of the cooling circulation pump, and proposes a plastic injection molding device and method.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A plastic injection molding device comprises a workbench with an injection mold assembly, and further comprises: a melting injection tube, which is fixedly connected to the workbench, and the injection end of the melting injection tube is connected to the input end of the injection mold assembly, wherein the feeding end of the melting injection tube is fixedly connected to a feeding barrel through a mounting tube, a spiral lifting mechanism is arranged in the feeding barrel, and a jet hole is arranged on the spiral lifting mechanism, when the spiral lifting mechanism drives the plastic to move from bottom to top, the jet hole moves synchronously and sprays; a hollow plate, which is sleeved on the outer wall of the melting injection tube, a cooling pipe is arranged in the injection mold assembly, and the output end of the cooling pipe is connected to the cavity of the hollow plate; a drying mechanism, which is arranged on the inner wall of the feeding barrel, and the input end of the drying mechanism is connected to the cavity of the hollow plate through a connecting pipe; a recoil jet mechanism, which is arranged in the feeding barrel, wherein an air outlet is opened at the top of the feeding barrel, the jet end of the recoil jet mechanism faces the air outlet, and when the jet hole sprays gas, the recoil jet mechanism sprays gas toward the air outlet.

[0008] In order to facilitate stirring of the plastic, preferably, the spiral lifting mechanism comprises a hollow tube rotatably connected to the feeding barrel, and a spiral plate is fixedly connected to the outer wall of the hollow tube.

[0009] In order to enable the spiral plate to stir the plastic and blow air to the plastic at the same time, further, a transmission disk is fixedly connected to the top of the feed barrel, a turbine blade is fixedly connected to the outer wall of the hollow tube, and the turbine blade is arranged in the cavity of the transmission disk, and the transmission disk is arranged on the connecting pipe. When the coolant is transported through the connecting pipe, the turbine blade rotates synchronously.

[0010] In order to facilitate the heating of the air in the feed barrel, the drying mechanism further includes: a heat conduction plate fixedly connected to the inner wall of the feed barrel, wherein a cavity is opened in the heat conduction plate, and a liquid inlet pipe and a liquid outlet pipe are fixedly connected to the feed barrel respectively, and the liquid inlet pipe and the liquid outlet pipe are both connected to the cavity, and the liquid inlet pipe is connected to the connecting pipe; a cooling circulation pump arranged on the workbench, wherein the input end of the cooling circulation pump is fixedly connected to the liquid outlet pipe through a pipeline, and the output end of the cooling circulation pump is connected to the cooling pipe, and the cooling pipe includes a delivery pipe and an output pipe arranged in the injection mold assembly, the delivery pipe is connected to the output end of the cooling circulation pump, and the output pipe is fixedly connected to the hollow plate.

[0011] In order to facilitate the discharge of moisture in the feed barrel, preferably, the recoil jet mechanism includes a hollow disk fixedly connected to the outer wall of the hollow tube, the hollow disk is arranged in the feed barrel, and a cavity is opened in the hollow disk, the cavity is connected with the hollow tube, a through hole is opened at the top of the hollow disk, and the jet end of the through hole faces the air outlet.

[0012] In order to facilitate the recycling of heat outside the hollow plate, further, an air delivery plate is fixedly connected to the top of the transmission plate, the hollow tube extends to the air delivery plate and a main gear is arranged therein, a rotating shaft is rotatably connected to the air delivery plate, an auxiliary gear is fixedly connected to the rotating shaft, the main gear is meshed with the auxiliary gear, a booster plate is fixedly connected to the top of the air delivery plate, the rotating shaft extends to the booster plate and is fixedly connected to blades, a heat conducting pipe is wound around the outer wall of the hollow plate, the heat conducting pipe is connected to the booster plate, and the booster plate is connected to the cavity of the air delivery plate through an air outlet pipe.

[0013] In order to facilitate the provision of hot air to the diversion chamber and the jet hole, preferably, a guide chamber is opened in the hollow tube, the guide chamber is connected to the gas delivery disk, and a diversion chamber is opened in the spiral plate, and the diversion chamber is respectively connected to the guide chamber and the jet hole.

[0014] In order to facilitate filtering and cleaning of the air entering the heat conducting pipe, preferably, a filter box is provided at the air inlet end of the heat conducting pipe, and a filter screen is provided in the filter box.

[0015] In order to facilitate the injection molding of the plastic pallet, the injection mold assembly further includes a concave mold and a convex mold, a work box is fixedly connected to the workbench, the concave mold is fixedly connected in the work box, and the concave mold is connected to the injection end of the melting injection tube, and the convex mold is slidably connected in the work box and cooperates with the concave mold.

[0016] A plastic injection molding method, the operating steps are as follows:

[0017] Step 1: transport the plastic into the feed barrel through the pipeline, start the melt injection pipe, and inject the molten plastic liquid into the injection mold assembly;

[0018] Step 2: When the injection mold assembly is demoulded, the cooling circulation pump is started to allow the coolant to cool and demould the mold through the delivery pipe and the output pipe. The coolant absorbs the heat of the mold and is injected into the cavity of the hollow plate;

[0019] Step 3: The coolant in the hollow plate cavity absorbs the heat on the outer wall of the molten injection tube and transfers it to the heat conducting plate. The temperature of the heat conducting plate rises to heat and dehumidify the plastic particles in the feed barrel.

[0020] Step 4: The spiral plate rotates to move the particles in the feed barrel, and the jet holes spray hot air to the moving particles;

[0021] Step 5: Jet through the hole to allow the humid gas in the feed barrel to be discharged through the outlet hole.

[0022] Compared with the prior art, the present invention provides a plastic injection molding device and method, which has the following beneficial effects:

[0023] 1. The plastic injection molding equipment drives the spiral plate to rotate through the hollow tube, so that the spiral plate drives the plastic particles to move spirally inside the feeding barrel, and can evenly mix the plastic particles in the barrel while stirring. While stirring, the jet hole synchronously follows the spiral lifting mechanism to move spirally, and the jet hole ejects hot air. With the movement of the jet hole, on the one hand, the hot air can be evenly distributed in the entire barrel, effectively increasing the temperature of the plastic particles, thereby accelerating their melting or processing process. On the other hand, the ejected hot air can also help evaporate the moisture on the surface of the plastic particles, reduce the moisture content, thereby reducing bubbles and defects caused by moisture, improving the quality of the final product, preventing the plastic with moisture from generating vacuum bubbles in the molten state, preventing bubbles or pores from forming inside the molded plastic tray, and improving the strength of the finished product;

[0024] 2. The plastic injection molding equipment starts the cooling circulation pump, and the coolant first passes through the interior of the injection mold assembly to cool the mold, and the heat-absorbing coolant first passes through the cavity of the hollow plate sleeved on the outer wall of the molten injection tube. In this process, the coolant absorbs the excess heat emitted from the outer wall of the molten injection tube and transfers it to the heat conduction plate for recycling, so that the excess heat in the coolant is transferred to the inside of the feed barrel, and the excess heat in the injection mold assembly can be recycled, which not only reduces the waste of heat resources, but also reduces the energy consumption of the cooling circulation pump;

[0025] 3. The plastic injection molding equipment drives the plastic particles to move through the spiral plate, and the jet holes will spray the particles to the outside of the drying mechanism on the inner wall of the feed barrel, thereby impacting and vibrating the entire plastic particles, thereby promoting the evaporation of water vapor in the plastic particles, improving the transfer efficiency of the heat and moisture of the hot air inside the feed barrel, promoting the rapid evaporation of water vapor, accelerating the drying process of the plastic particles, and preheating the plastic particles;

[0026] 4. The plastic injection molding equipment sprays gas toward the air outlet through the through hole. In this process, the moisture inside the feed barrel is blown to the outside through the air outlet opened on the top of the feed barrel, which can quickly blow out the moisture inside the feed barrel, significantly reduce the moisture content in the air inside the feed barrel, thereby improving the drying effect of the plastic particles, and preventing moisture from accumulating in the feed barrel, thereby keeping the environment dry;

[0027] 5. The plastic injection molding equipment is provided with a filter box at the air inlet end of the heat conducting pipe. A filter screen is provided in the filter box for intercepting and filtering the gas entering the heat conducting pipe. The filter screen is detachable for subsequent cleaning.

[0028] The parts not involved in the device are the same as the prior art or can be implemented by the prior art. The present invention can effectively increase the temperature of plastic particles, thereby accelerating their melting or processing process. It can also enable the ejected hot air to help evaporate the moisture on the surface of the plastic particles and reduce the moisture content, thereby reducing bubbles and defects caused by moisture, improving the quality of the final product, preventing plastics with moisture from generating vacuum bubbles in a molten state, preventing bubbles or pores from forming inside the molded plastic tray, and improving the strength of the finished product. It can also transfer excess heat in the coolant to the inside of the feed barrel for heating the air, and recycle excess heat in the injection mold assembly, which not only reduces the waste of heat resources, but also reduces the energy consumption of the cooling circulation pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic diagram of the isometric structure of a plastic injection molding device proposed by the present invention;

[0030] Figure 2 A partial structural diagram of a plastic injection molding device proposed by the present invention Figure 1 ;

[0031] Figure 3 A partial structural diagram of a plastic injection molding device proposed by the present invention Figure 2 ;

[0032] Figure 4 A schematic diagram of a cross-section of a plastic injection molding device proposed by the present invention Figure 1 ;

[0033] Figure 5 A schematic diagram of a cross-section of a plastic injection molding device proposed by the present invention Figure 2 ;

[0034] Figure 6 A schematic diagram of a cross-section of a plastic injection molding device proposed by the present invention Figure 3 ;

[0035] Figure 7 The present invention provides a schematic diagram of the structure inside a hollow tube of a plastic injection molding device.

[0036] In the figure: 1, workbench; 2, melting injection tube; 3, mounting tube; 4, feed barrel; 5, hollow plate; 6, heat transfer tube; 7, filter box; 8, concave mold; 9, convex mold; 10, delivery pipe; 11, output pipe; 12, hollow tube; 13, spiral plate; 14, jet hole; 15, guide cavity; 16, diversion cavity; 17, hollow disk; 18, through hole; 19, turbine blade; 20, transmission disk; 21, air delivery disk; 22, main gear; 23, rotating shaft; 24, auxiliary gear; 25, boost disk; 26, blade; 27, air outlet pipe; 28, air outlet hole; 29, liquid inlet pipe; 30, heat transfer plate; 31, liquid outlet pipe. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0038] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0039] Example:

[0040] Reference Figure 1-Figure 7 A plastic injection molding device includes a workbench 1 with an injection mold assembly, and also includes: a melting injection tube 2, which is fixedly connected to the workbench 1, and the injection end of the melting injection tube 2 is connected to the input end of the injection mold assembly, wherein a feeding barrel 4 is fixedly connected to the feeding end of the melting injection tube 2 through a mounting tube 3, a spiral lifting mechanism is arranged in the feeding barrel 4, and an injection hole 14 is arranged on the spiral lifting mechanism, when the spiral lifting mechanism drives the plastic to move from bottom to top, the injection hole 14 moves synchronously and sprays; hollow plate 5, which is sleeved on the outer wall of the melting injection tube 2, a cooling tube is arranged in the injection mold assembly, and the output end of the cooling tube is communicated with the cavity of the hollow plate 5; a drying mechanism is arranged on the inner wall of the feed barrel 4, and the input end of the drying mechanism is communicated with the cavity of the hollow plate 5 through a connecting tube; a recoil jet mechanism is arranged in the feed barrel 4, wherein an air outlet 28 is opened at the top of the feed barrel 4, and the jet end of the recoil jet mechanism faces the air outlet 28, and when the jet hole 14 jets, the recoil jet mechanism jets gas toward the air outlet 28.

[0041] The melting injection tube 2 is mainly composed of a melting system and an injection system. The melting system is mainly composed of a heater, a screw, etc. It is the main part for heating and melting plastic particles. The injection system is mainly composed of an injection cylinder, an injection head, etc. It can inject the molten plastic into the injection mold assembly to complete the molding. The device is fixedly connected to a feed barrel 4 at the feed end of the melting injection tube 2 through a mounting tube 3, which is used to inject plastic particles into the melting injection tube 2.

[0042] When the plastic particles are pre-injected into the feed barrel 4, the spiral lifting mechanism will drive the plastic particles to move spirally inside the feed barrel 4, stirring the plastic particles while also evenly mixing the plastic particles in the barrel. While stirring, the jet hole 14 synchronously follows the spiral lifting mechanism to move in a spiral shape, and the jet hole 14 ejects hot air. As the jet hole 14 moves, on the one hand, the hot air can be evenly distributed throughout the barrel, effectively increasing the temperature of the plastic particles, thereby accelerating their melting or processing process. On the other hand, the ejected hot air can also help evaporate the moisture on the surface of the plastic particles, reducing the moisture content, thereby reducing bubbles and defects caused by moisture, improving the quality of the final product, preventing plastic with moisture from generating vacuum bubbles in a molten state, preventing bubbles or pores from forming inside the molded plastic tray, and improving the strength of the finished product.

[0043] In addition, when the spiral lifting mechanism drives the plastic particles to be spirally stirred inside the feed barrel 4, the plastic particles will be fully in contact with the drying mechanism. During the movement, the plastic particles can be fully in contact with the outside of the drying mechanism. When the cooling circulation pump is started, the coolant will first pass through the inside of the injection mold assembly to cool and form the mold, and the coolant that absorbs heat will first pass through the cavity of the hollow plate 5 mounted on the outer wall of the molten injection tube 2. During this process, the coolant will absorb the excess heat emitted from the outer wall of the molten injection tube 2, and transfer it to the drying mechanism for recycling, so that it can transfer the excess heat in the coolant to the inside of the feed barrel 4, and the excess heat in the injection mold assembly can be recycled, which not only reduces the waste of heat resources, but also reduces the energy consumption of the cooling circulation pump.

[0044] And the spiral lifting mechanism can cooperate with the drying mechanism. When the spiral lifting mechanism drives the plastic particles to move, the air jet hole 14 will spray the particles to the outside of the drying mechanism on the inner wall of the feed barrel 4, and then impact and vibrate the plastic particles as a whole, thereby promoting the evaporation of water vapor in the plastic particles, improving the transfer efficiency of heat and moisture in the hot air inside the feed barrel 4, promoting the rapid evaporation of water vapor, accelerating the drying process of the plastic particles, and preheating the plastic particles.

[0045] When the jet hole 14 is in the process of jetting, the recoil jet mechanism jets gas toward the air outlet 28. In this process, the moisture inside the feed barrel 4 will be blown to the outside through the air outlet 28 opened at the top of the feed barrel 4, which can quickly blow out the moisture inside the feed barrel 4, significantly reduce the moisture content in the air inside the feed barrel 4, thereby improving the drying effect of the plastic particles, and preventing moisture from accumulating in the feed barrel 4, thereby keeping the environment dry.

[0046] Furthermore, the spiral lifting mechanism comprises a hollow tube 12 rotatably connected to the inside of the feed barrel 4 , and a spiral plate 13 is fixedly connected to the outer wall of the hollow tube 12 .

[0047] The hollow tube 12 rotates to drive the spiral plate 13 to rotate, thereby driving the plastic particles to move in the feed barrel 4 .

[0048] A transmission disc 20 is fixedly connected to the top of the feed barrel 4, a turbine blade 19 is fixedly connected to the outer wall of the hollow tube 12, and the turbine blade 19 is arranged in the cavity of the transmission disc 20, and the transmission disc 20 is arranged on the connecting pipe. When the coolant is transported through the connecting pipe, the turbine blade 19 rotates synchronously.

[0049] When the cooling circulation pump is working, the coolant entering the cavity of the hollow plate 5 will be transported to the transmission plate 20 through the pipeline. At this time, the coolant will drive the turbine blade 19 to rotate during the flow, and then the hollow tube 12 will drive the spiral plate 13 to rotate.

[0050] Furthermore, the above-mentioned drying mechanism includes: a heat conducting plate 30 fixedly connected to the inner wall of the feed barrel 4, wherein a cavity is opened in the heat conducting plate 30, and a liquid inlet pipe 29 and a liquid outlet pipe 31 are respectively fixedly connected to the feed barrel 4, the liquid inlet pipe 29 and the liquid outlet pipe 31 are both connected to the cavity, and the liquid inlet pipe 29 is connected to the connecting pipe; a cooling circulation pump arranged on the workbench 1, wherein the input end of the cooling circulation pump is fixedly connected to the liquid outlet pipe 31 through a pipeline, and the output end of the cooling circulation pump is connected to the cooling pipe, and the cooling pipe includes a delivery pipe 10 and an output pipe 11 arranged in the injection mold assembly, the delivery pipe 10 is connected to the output end of the cooling circulation pump, and the output pipe 11 is fixedly connected to the hollow plate 5.

[0051] In addition, the injection mold assembly includes a female mold 8 and a male mold 9. A work box is fixedly connected to the workbench 1. The female mold 8 is fixedly connected in the work box, and the female mold 8 is connected to the injection end of the molten injection tube 2. The male mold 9 is slidably connected in the work box and cooperates with the female mold 8. The molten plastic is injection molded by cooperating with the female mold 8 and the male mold 9. In addition, the male mold 9 is driven by a hydraulic cylinder.

[0052] When the cooling circulation pump is started, the liquid will be transported to the inside of the female mold 8 and the male mold 9 through the delivery pipe 10, the coolant will absorb the heat inside the mold and transfer it to the hollow plate 5 through the output pipe 11, and then be transported to the liquid inlet pipe 29 by the hollow plate 5, and the liquid inlet pipe 29 will transfer the coolant to the cavities of the heat conducting plates 30 at different positions on the inner wall of the feed barrel 4, so that the heat conducting plates 30 generate heat, heat the air in the feed barrel 4, and then the coolant is discharged and transported to the input end of the cooling circulation pump by the liquid outlet pipe 31 to achieve the circulation effect.

[0053] It needs to be explained that the above-mentioned recoil jet mechanism includes a hollow disk 17 fixedly connected to the outer wall of the hollow tube 12, the hollow disk 17 is arranged in the feed barrel 4, and a cavity is opened in the hollow disk 17, the cavity is connected to the hollow tube 12, a through hole 18 is opened at the top of the hollow disk 17, and the jet end of the through hole 18 faces the outlet hole 28.

[0054] When gas is transported in the hollow tube 12 , the through hole 18 will blow the gas toward the position of the gas outlet 28 , so that the moisture in the feed barrel 4 is discharged to the outside.

[0055] Here, in order to facilitate the transportation of hot air in the hollow tube 12, an air delivery disc 21 is fixedly connected to the top of the transmission disc 20, and a main gear 22 is provided in the air delivery disc 21 extending from the hollow tube 12. A rotating shaft 23 is rotatably connected in the air delivery disc 21, and an auxiliary gear 24 is fixedly connected to the rotating shaft 23. The main gear 22 is meshed with the auxiliary gear 24. A booster disc 25 is fixedly connected to the top of the air delivery disc 21, and the rotating shaft 23 extends to the booster disc 25 and is fixedly connected with blades 26. A heat conducting pipe 6 is wound around the outer wall of the hollow plate 5, and the heat conducting pipe 6 is connected to the booster disc 25. The booster disc 25 is connected to the cavity of the air delivery disc 21 through an air outlet pipe 27.

[0056] When the hollow tube 12 rotates, it will drive the main gear 22 in the gas delivery disk 21 to rotate, and the main gear 22 will drive the auxiliary gear 24 on the rotating shaft 23 to rotate, so that the rotating shaft 23 drives the blades 26 in the supercharging disk 25 to rotate, thereby generating a negative pressure effect in the supercharging disk 25, and the heat conducting pipe 6 connected to the supercharging disk 25 will absorb the external air into the inside of the supercharging disk 25, and then the gas is transported to the cavity of the gas delivery disk 21 by the air outlet pipe 27, and the heat conducting pipe 6 can be a copper pipe. When the gas moves inside the heat conducting pipe 6, it will transfer the heat on the outer wall of the hollow plate 5, thereby heating and raising the temperature of the air, so that the gas in the heat conducting pipe 6 rises, and a filter box 7 is arranged at the air inlet end of the heat conducting pipe 6, and a filter screen is arranged in the filter box 7 for intercepting and filtering the gas entering the heat conducting pipe 6, and the filter screen is detachable for subsequent cleaning.

[0057] In addition, a guide cavity 15 is provided in the hollow tube 12, and the guide cavity 15 is connected to the gas delivery plate 21. A diversion cavity 16 is provided in the spiral plate 13, and the diversion cavity 16 is respectively connected to the guide cavity 15 and the injection hole 14. The gas is respectively transported to the diversion cavity 16 and the injection hole 14 through the guide cavity 15.

[0058] A plastic injection molding method, the operating steps are as follows:

[0059] Step 1: transport the plastic into the feed barrel 4 through the pipeline, start the melting injection tube 2, and inject the molten plastic liquid into the injection mold assembly;

[0060] Step 2: When the injection mold assembly is demoulded, the cooling circulation pump is started to cool the mold through the delivery pipe 10 and the output pipe 11 to demould the mold. The coolant absorbs the heat of the mold and is injected into the cavity of the hollow plate 5;

[0061] Step 3: The cooling liquid in the cavity of the hollow plate 5 absorbs the heat on the outer wall of the molten injection tube 2 and transfers it to the heat conducting plate 30. The temperature of the heat conducting plate 30 increases to heat and dehumidify the plastic particles in the feed barrel 4.

[0062] Step 4: The spiral plate 13 rotates to move the particles in the feed barrel 4, and the air jet holes 14 spray hot air to the moving particles;

[0063] Step 5: The through hole 18 ejects air, so that the moist gas in the feed barrel 4 is discharged through the air outlet 28 .

[0064] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A plastic injection molding device, comprising a workbench (1) with an injection mold assembly, characterized in that: Also includes: A melting injection tube (2) is fixedly connected to the workbench (1), and an injection end of the melting injection tube (2) is connected to an input end of the injection mold assembly. The feed end of the melting injection tube (2) is fixedly connected to a feed barrel (4) via a mounting tube (3), a spiral lifting mechanism is arranged inside the feed barrel (4), and an air jet hole (14) is arranged on the spiral lifting mechanism. When the spiral lifting mechanism drives the plastic to move from bottom to top, the air jet hole (14) moves synchronously and sprays air; A hollow plate (5) is sleeved on the outer wall of the melting injection tube (2); a cooling tube is arranged in the injection mold assembly, and the output end of the cooling tube is connected to the cavity of the hollow plate (5); A drying mechanism is arranged on the inner wall of the feed cylinder (4), and the input end of the drying mechanism is connected to the cavity of the hollow plate (5) through a connecting pipe; A recoil jet mechanism is arranged in the feed barrel (4), The top of the feed barrel (4) is provided with an air outlet (28), and the jet end of the recoil jet mechanism is directed toward the air outlet (28). When the jet hole (14) jets, the recoil jet mechanism jets gas toward the air outlet (28).

2. A plastic injection molding device according to claim 1, characterized in that: The spiral lifting mechanism comprises a hollow tube (12) rotatably connected to the inside of the feeding barrel (4), and a spiral plate (13) is fixedly connected to the outer wall of the hollow tube (12).

3. A plastic injection molding device according to claim 2, characterized in that: A transmission disc (20) is fixedly connected to the top of the feed barrel (4), a turbine blade (19) is fixedly connected to the outer wall of the hollow tube (12), and the turbine blade (19) is arranged in the cavity of the transmission disc (20), and the transmission disc (20) is arranged on the connecting pipe. When the coolant is transported through the connecting pipe, the turbine blade (19) rotates synchronously.

4. A plastic injection molding device according to claim 1, characterized in that: The drying mechanism comprises: a heat conducting plate (30) fixedly connected to the inner wall of the feed barrel (4), A cavity is provided in the heat conducting plate (30), and a liquid inlet pipe (29) and a liquid outlet pipe (31) are fixedly connected to the feed cylinder (4), respectively; the liquid inlet pipe (29) and the liquid outlet pipe (31) are both connected to the cavity, and the liquid inlet pipe (29) is connected to the connecting pipe; a cooling circulation pump arranged on the workbench (1), The input end of the cooling circulation pump is fixedly connected to the liquid outlet pipe (31) through a pipeline, and the output end of the cooling circulation pump is connected to the cooling pipe. The cooling pipe includes a delivery pipe (10) and an output pipe (11) arranged in the injection mold assembly. The delivery pipe (10) is connected to the output end of the cooling circulation pump, and the output pipe (11) is fixedly connected to the hollow plate (5).

5. A plastic injection molding device according to claim 2, characterized in that: The recoil jet mechanism comprises a hollow disk (17) fixedly connected to the outer wall of the hollow tube (12); the hollow disk (17) is arranged in the feed barrel (4); a cavity is formed in the hollow disk (17); the cavity is communicated with the hollow tube (12); a through hole (18) is formed at the top of the hollow disk (17); and the jet end of the through hole (18) faces the air outlet (28).

6. A plastic injection molding device according to claim 3, characterized in that: The top of the transmission disc (20) is fixedly connected to an air delivery disc (21); the hollow tube (12) extends to the air delivery disc (21) and is provided with a main gear (22); a rotating shaft (23) is rotatably connected to the air delivery disc (21); an auxiliary gear (24) is fixedly connected to the rotating shaft (23); the main gear (22) and the auxiliary gear (24) are meshed; a booster disc (25) is fixedly connected to the top of the air delivery disc (21); the rotating shaft (23) extends to the booster disc (25) and is fixedly connected with blades (26); a heat conduction pipe (6) is wound around the outer wall of the hollow plate (5); the heat conduction pipe (6) is connected to the booster disc (25); and the booster disc (25) is connected to the cavity of the air delivery disc (21) through an air outlet pipe (27).

7. A plastic injection molding device according to claim 6, characterized in that: A flow guide cavity (15) is provided in the hollow tube (12), and the flow guide cavity (15) is connected to the gas delivery plate (21). A flow diversion cavity (16) is provided in the spiral plate (13), and the flow diversion cavity (16) is respectively connected to the flow guide cavity (15) and the gas injection hole (14).

8. The plastic injection molding equipment according to claim 6, characterized in that: The air inlet end of the heat conducting pipe (6) is provided with a filter box (7), and a filter screen is provided inside the filter box (7).

9. The plastic injection molding equipment according to claim 1, characterized in that: The injection mold assembly comprises a female mold (8) and a male mold (9); a work box is fixedly connected to the workbench (1); the female mold (8) is fixedly connected in the work box, and the female mold (8) is connected to the injection end of the melting injection tube (2); the male mold (9) is slidably connected in the work box and cooperates with the female mold (8).

10. A plastic injection molding method, using a plastic injection molding device according to any one of claims 1 to 9, characterized in that: The steps are as follows: Step 1: transport the plastic into the feed barrel (4) through a pipeline, start the melt injection tube (2), and inject the melted plastic liquid into the injection mold assembly; Step 2: When the injection mold assembly is demoulded, the cooling circulation pump is started to allow the coolant to cool the mold through the delivery pipe (10) and the output pipe (11) to demould, and the coolant absorbs the heat of the mold and is injected into the cavity of the hollow plate (5); Step 3: The cooling liquid in the cavity of the hollow plate (5) absorbs the heat on the outer wall of the molten injection tube (2) and transfers it to the heat conducting plate (30), and the temperature of the heat conducting plate (30) rises to heat and dehumidify the plastic particles in the feed barrel (4); Step 4: The spiral plate (13) rotates to drive the particles in the feed barrel (4) to move, and the air jet holes (14) spray hot air to the moving particles; Step 5: Jet the air through the through hole (18) to discharge the moist air in the feed barrel (4) through the air outlet (28).

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