Injection molding equipment of injection molding machine

Abstract

The invention relates to the technical field of injection molding machines, in particular to injection molding equipment of an injection molding machine, which comprises a base, a mounting frame is fixedly mounted at the top of the base, a conveying mechanism is arranged on the mounting frame, a charging barrel is fixedly mounted on the mounting frame, and the bottom of the charging barrel is fixedly communicated with a connecting barrel; the connecting cylinder is rotatably connected with a cooling cylinder through a rotating shaft, an inner cylinder is vertically arranged in the cooling cylinder, a thermal insulation layer is arranged on the inner wall of the cooling cylinder, a heating layer is arranged on the inner wall of the thermal insulation layer, and a plurality of groups of spiral plates are linearly distributed on the outer wall of the inner cylinder from top to bottom. Bubbles and impurities in melts are separated from main melts, the situation that a molten mixture with the high bubble content enters a final injection molding area is reduced, the heating layer automatically adjusts the heating temperature according to pressure changes, unmolten particles are directionally heated, the melting process is more uniform, and therefore the quality of the plastic melts is guaranteed; and the condition of non-uniform melting is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of injection molding machines, and in particular to injection molding equipment of an injection molding machine. Background Art

[0002] Injection molding machine Injection molding equipment usually refers to an industrial equipment used to produce plastic parts. It injects molten plastic materials into the mold through heating, injection and cooling processes to form the required plastic products. Some plastics (such as polyamide (PA), polycarbonate (PC), etc.) absorb moisture from the air during storage. This moisture is easily converted into water vapor during processing, resulting in the generation of gas. If the moisture is not fully removed, or the gas (such as water vapor, air or volatiles) generated during the injection molding process cannot be effectively discharged, it will affect the quality of injection molding, and eventually easily lead to bubbles or pores inside the product.

[0003] At present, although the existing exhaust injection molding machines can collect and purify the gas overflowing from the outside, they usually do not fully solve the problem of exhausting the gas inside the melt. They can only collect the gas overflowing from the mold or the injection molding machine (usually the gas converted from water or volatiles), but the bubbles generated inside the melt (such as water vapor or gas generated by the high-temperature melting process) cannot be effectively removed. These gases will eventually be retained in the melt and form bubbles after cooling, resulting in internal defects of the injection molded product, such as pores and foam, which seriously affect the quality of injection molding. In addition, the temperature of the entire melt is controlled as a whole, and there is no local adjustment for different areas of the melt, which is prone to uneven heating and easily leads to large temperature differences in different parts of the melt, which in turn affects the quality of the product, making the equipment less practical. Summary of the invention

[0004] The purpose of the present invention is to solve the disadvantage of poor practicability of the equipment in the prior art and to propose an injection molding machine injection molding equipment.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] An injection molding machine injection molding equipment, comprising a base, a mounting frame fixedly mounted on the top of the base, a conveying mechanism arranged on the mounting frame, a barrel fixedly mounted on the mounting frame, a connecting barrel fixedly connected to the bottom of the barrel, the connecting barrel rotatably connected to a cooling barrel via a rotating shaft, the cooling barrel is located below the connecting barrel and is connected to the inside of the connecting barrel, an inner barrel is vertically arranged inside the cooling barrel, and the inner barrel is located at the center of the cooling barrel, an insulation layer is arranged on the inner wall of the cooling barrel, a heating layer is arranged on the inner wall of the insulation layer, and the heating layer adjusts the temperature according to the pressure;

[0007] The outer wall of the inner cylinder is linearly distributed with multiple groups of spiral plates from top to bottom, and a heating mechanism is arranged between the upper and lower corresponding spiral plates, the spiral plates are fixedly connected to the heating layer and rotatably connected to the inner cylinder, and the top plates of the spiral plates are provided with a diversion mechanism;

[0008] The diverter mechanism comprises a diverter plate, the diverter plate is fixedly connected to the heating layer, two inner limit plates are fixedly connected to the side wall of the diverter plate, the distance between the two inner limit plates gradually increases along the direction away from the diverter plate, and the inner limit plate is fixedly connected to the heating layer, and the sides of the two inner limit plates away from each other are respectively installed with side limit plates through connecting components, and the side limit plates are fixedly connected to the heating layer, the side limit plates and the inner limit plates on the corresponding sides and the heating layer form a heating flow channel, and the flow area of ​​the heating channel gradually decreases along the direction away from the diverter plate;

[0009] The mounting frame is provided with an injection molding area, which is located below the cooling cylinder and communicated with the interior of the cooling cylinder. A recovery mechanism is provided at the bottom of the inner cylinder.

[0010] Preferably, a controller is fixedly mounted on the side wall of the base, the conveying mechanism includes a first motor fixedly mounted on a mounting frame, a feed screw is fixedly connected to the bottom of the first motor, the barrel is located below the first motor, the feed screw is located inside the barrel, and a feed hopper is fixedly connected to the side wall of the barrel.

[0011] Preferably, the connecting assembly is located at one end of the inner limit plate away from the diverter plate, and the connecting assembly includes two mounting shafts, which are respectively fixedly connected to the inner limit plate and the side limit plate, and a connecting shaft is rotatably connected between the two mounting shafts, and a stirring assembly is arranged on the connecting shaft.

[0012] Preferably, the stirring assembly includes a cover plate fixedly mounted on the side wall of the connecting shaft and a stirring rod, a gap is provided between the inner limit plate and the corresponding side limit plate, the stirring rod corresponds to the gap, and the cover plate is located at one end of the heating channel away from the diverter plate and corresponds to the channel opening.

[0013] Preferably, a detection plate is fixedly installed on the top of the spiral plate, the detection plate corresponds to the diversion mechanism and is located at the end of the cover plate away from the diversion plate. The detection plate is fixedly connected to the heating layer and is used to detect the flow rate of the molten material per unit time.

[0014] Preferably, the heating mechanism includes a heating block, which is arranged in the cooling cylinder through a rotating component, and the rotating component includes a second motor. A fixing rod is fixedly installed on the outer wall of the cooling cylinder, and the second motor is fixedly installed on the fixing rod. An insulating sleeve is fixedly connected to the output end of the second motor, and the insulating sleeve passes through the cooling cylinder, the insulating layer and the heating layer, and is rotatably connected to the cooling cylinder, the insulating layer and the heating layer. The heating block is fixedly connected to the insulating sleeve, and the insulating sleeve and the heating block form a circular ring structure. A heat conductive block is fixedly installed on the side wall of the insulating sleeve, and the heat conductive block corresponds to the cooling cylinder and is located inside the cooling cylinder.

[0015] Preferably, the inner wall of the thermal insulation sleeve is provided with a cooling component, and the cooling component includes a counterweight block rotatably connected to the inner wall of the thermal insulation sleeve, and a cooling block is fixedly installed on the counterweight block, and the counterweight block and the cooling block form a cylindrical structure.

[0016] Preferably, a sealing plate is fixedly installed on the end of the insulation sleeve away from the second motor, and an adjusting rod is fixedly connected to the end of the sealing plate away from the insulation sleeve. The adjusting rod is threadably connected to a guide plate, and the top and bottom of the guide plate are respectively slidingly connected to the spiral plates on the corresponding sides, and a limit block is fixedly installed on the end of the adjustment rod away from the sealing plate, and the limit block is located on the side of the guide plate away from the sealing plate.

[0017] Preferably, the recovery mechanism includes a recovery chamber arranged inside the inner cylinder, the bottom of the inner cylinder is fixedly connected to a reflux plate through a connecting frame, the reflux plate is located below the recovery chamber and is connected to the inside of the recovery chamber, and a material extraction mechanism is arranged on the top of the inner cylinder.

[0018] Preferably, the extraction mechanism includes an extraction pipe fixedly connected to the top of the inner cylinder, the extraction pipe is connected to the recovery chamber, one end of the extraction pipe away from the inner cylinder passes through the connecting cylinder and is fixedly connected to the connecting cylinder, and the outer wall of the extraction pipe is sheathed with an insulation pipe, and the insulation pipe is located outside the connecting cylinder.

[0019] Compared with the prior art, the advantages of the present invention are:

[0020] 1. In the present invention, through the action of centrifugal force, solid materials with higher density will be pushed to a position close to the inner wall of the heating layer, while the gas will tend to the outer wall of the inner cylinder, effectively separating the bubbles and impurities in the melt from the main melt, reducing the molten mixture with high bubble content from entering the final injection molding area, and the gas and the melt containing bubbles will eventually enter the recovery chamber to be recycled and reused, reducing material waste. By removing undesirable components, a purer and more uniform melt can be obtained during the injection molding process, which is conducive to more precise injection molding and reducing later product defects.

[0021] 2. The present invention provides an inner limit plate, a side limit plate and a heating layer, so that the solid plastic particles stay in the heating flow channel and are continuously heated, while the melted molten material flows out smoothly, ensuring that the solid particles that are not completely melted will not flow into the next link, avoiding the influence of these unmelted particles on subsequent processing or the quality of the final product. As the solid particles accumulate in the heating flow channel, the pressure in the flow channel gradually increases, and the heating layer automatically adjusts the heating temperature according to the pressure change, ensuring that the heating layer can dynamically adapt to the state of the material at different stages, avoiding the risk of excessively high or low temperature, ensuring the stability and efficiency of the heating process, effectively promoting the melting of solid particles, ensuring that the heating process is more precise and efficient, and the unmelted particles are heated in a direction, making the melting process more uniform, thereby ensuring the quality of the plastic melt and avoiding the occurrence of uneven melting. At the same time, it can effectively avoid the problem of overheating and ensure the stability and quality of the plastic melt.

[0022] 3. The present invention provides a stirring rod to continuously stir the solid particles, thereby promoting full mixing of the unmelted particles with the melted molten material, ensuring uniform heating of the raw materials, reducing local overheating or overcooling, and optimizing the melting effect. The cooperation of the cover plate, the connecting shaft, the stirring rod and the heating flow channel promotes the good circulation of the molten material and the unmelted particles, avoids stagnation or unevenness of the materials, and enhances the processing efficiency of the system. The stirring action causes the solid particles to melt quickly, ensuring the timely processing and discharge of the materials, and improving the fluency and work efficiency of the production line.

[0023] 4. The present invention sets a second motor and other devices. When the fluidity of the melt is poor, the temperature of the heating block is adjusted to face the flow direction of the melt, thereby quickly increasing the temperature of the melt and improving the fluidity of the melt, avoiding the problem of melt blockage or ineffective removal of bubbles due to poor fluidity. When the fluidity of the melt is good, the heating block rotates to the side close to the cooling block. At this time, the heating block changes from facing the flow direction of the melt to the opposite direction. The cooling block quickly conducts heat to the cooling cylinder through the heat conduction block, reducing the temperature of the heating block and avoiding overheating or thermal degradation. The change in the position of the heating block further controls the temperature of the melt to ensure that it flows and is injected within the optimal fluidity range. Through this mechanism, not only can energy consumption be reduced, but also the temperature of the melt can be controlled more accurately to prevent temperature fluctuations from having an adverse effect on fluidity and final injection molding quality.

[0024] 5. This device is provided with guide plates and other devices. The guide plates adjust their positions in real time and change the flow state of the melt according to the positions of the bubbles in the melt. When the melt has poor fluidity, the guide plates are kept in the area with more bubbles, prompting the melt to re-form a turbulent state, which helps to accelerate the separation of the bubbles. By guiding the flow of the melt, the guide plates can more efficiently help separate the bubbles from the melt, avoid bubbles remaining in the injection molding process and affecting the quality of the final product, maintain a turbulent state in the area with more bubbles, enhance the contact and separation efficiency between the gas and the melt, and reduce the possibility of bubbles being wrapped in the melt and entering the injection molding area with the melt, thereby helping to improve the surface quality, density and strength of the injection molded product.

[0025] In summary, the present invention effectively improves the efficiency of the injection molding process and product quality, reduces waste, and ensures more precise molding and higher quality final products by efficiently separating bubbles and impurities, recovering poor melts, and reducing material waste, and by comprehensively utilizing temperature control, stirring, bubble separation, and fluidity adjustment mechanisms. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the overall structure of an injection molding machine and injection molding equipment proposed by the present invention;

[0027] Figure 2 This is a structural schematic diagram of a barrel and a connecting barrel of an injection molding machine provided by the present invention;

[0028] Figure 3 This is a schematic structural diagram of a material extraction pipe portion of an injection molding machine injection molding equipment proposed by the present invention;

[0029] Figure 4 A schematic diagram of a half-section structure of a return plate and an inner cylinder of an injection molding machine provided by the present invention;

[0030] Figure 5 This is a schematic cross-sectional view of a cooling cylinder and a heating layer of an injection molding machine provided by the present invention;

[0031] Figure 6 A schematic diagram of the structure of a side limit plate and an inner limit plate of an injection molding machine provided by the present invention;

[0032] Figure 7 This is a structural schematic diagram of the connecting shaft and the detection plate of an injection molding machine injection molding equipment proposed by the present invention;

[0033] Figure 8 This is a structural schematic diagram of a cover plate and a stirring rod part of an injection molding machine provided by the present invention;

[0034] Fig. 9This is a structural schematic diagram of a guide plate and a spiral plate part of an injection molding equipment of an injection molding machine proposed by the present invention;

[0035] Fig.10 This is a structural schematic diagram of an injection molding machine injection molding equipment adjustment rod and guide plate part proposed by the present invention;

[0036] Fig.11 This is a schematic diagram of the exploded structure of the heat insulation sleeve of an injection molding machine proposed by the present invention;

[0037] Fig.12 The present invention provides a schematic structural diagram of a heating block and a cooling block of an injection molding machine.

[0038] In the figure: 1 base, 11 controller, 12 injection molding area, 2 first motor, 21 feed hopper, 22 feed screw, 23 barrel, 3 rotating shaft, 31 connecting barrel, 32 extraction pipe, 33 insulation pipe, 34 inner barrel, 35 reflux plate, 4 cooling barrel, 41 insulation layer, 42 heating layer, 43 spiral plate, 5 second motor, 51 fixing rod, 6 diverter plate, 61 detection plate, 62 side limit plate, 63 inner limit plate, 64 installation shaft, 641 cover plate, 642 connecting shaft, 643 stirring rod, 7 insulation sleeve, 71 guide plate, 72 heat conduction block, 73 heating block, 74 sealing plate, 741 adjusting rod, 742 limit block, 75 counterweight block, 751 cooling block. DETAILED DESCRIPTION

[0039] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions 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. The following embodiments are only for illustrative purposes and are not intended to limit the scope of the present invention.

[0040] Reference Figures 1 to 12An injection molding machine injection molding equipment comprises a base 1, a controller 11 is fixedly installed on the side wall of the base 1, a mounting frame is fixedly installed on the top of the base 1, a conveying mechanism is arranged on the mounting frame, the conveying mechanism comprises a first motor 2 fixedly installed on the mounting frame, a feeding screw 22 is fixedly connected to the bottom of the first motor 2, a barrel 23 is fixedly installed on the mounting frame, the barrel 23 is located below the first motor 2, the feeding screw 22 is located in the barrel 23, a feeding hopper 21 is fixedly connected to the side wall of the barrel 23, a connecting barrel 31 is fixedly connected to the bottom of the barrel 23, the connecting barrel 31 is rotatably connected to a cooling barrel 4 through a rotating shaft 3, the cooling barrel 4 is located below the connecting barrel 31, an inner barrel 34 is vertically arranged inside the cooling barrel 4, the inner barrel 34 is located at the center of the cooling barrel 4, an inner wall of the cooling barrel 4 is provided with a temperature insulation layer 41, an inner wall of the temperature insulation layer 41 is provided with a heating layer 42, and the inner barrel 34 The outer wall of the material cylinder 20 has multiple sets of spiral plates 43 linearly distributed from top to bottom. The spiral plates 43 are fixedly connected to the heating layer 42 and are rotatably connected to the inner cylinder 34. The raw materials enter the barrel 23 through the feeding funnel 21. The controller 11 starts the first motor 2. The feeding screw 22 rotates to convey the raw materials downward into the cooling cylinder 4 and moves downward along the multiple sets of spiral plates 43. The rotating shaft 3 is started by the controller 11. The rotating shaft 3 drives the cooling cylinder 4 and the multiple sets of spiral plates 43 to rotate. The function of the spiral plates 43 is not only to convey the raw materials, but also to promote the separation of the melt and the gas through centrifugal force. The rotation of the spiral plates 43 pushes the melt to different areas, helping to achieve the stratification of materials of different densities. The solid materials with high density will be concentrated near the heating layer 42, while the gas with low density will be pushed to the area near the outer wall of the inner cylinder 34, effectively separating the gas and solid particles, and improving the quality of the injection molding material.

[0041] The top plate of the spiral plate 43 is provided with a diverter mechanism, which includes a diverter plate 6, which is fixedly connected to the heating layer 42, and two inner limit plates 63 are fixedly connected to the side wall of the diverter plate 6, and the distance between the two inner limit plates 63 gradually increases in the direction away from the diverter plate 6, the two inner limit plates 63 are fixedly connected to the heating layer 42, and the sides of the two inner limit plates 63 away from each other are respectively installed with side limit plates 62 through connecting components, the two side limit plates 62 are fixedly connected to the heating layer 42, and the two side limit plates 62 are symmetrically distributed at the top and bottom of the diverter plate 6, and the connecting component is located at one end of the inner limit plate 63 away from the diverter plate 6, and the connecting component includes two mounting shafts 64, and the two mounting shafts 64 are respectively fixedly connected to the inner limit plate 63 and the side limit plate 62 A connecting shaft 642 is rotatably connected between the two mounting shafts 64, and a stirring assembly is arranged on the connecting shaft 642. The stirring assembly includes a cover plate 641 and a stirring rod 643 fixedly installed on the side wall of the connecting shaft 642. A gap is arranged between the inner limit plate 63 and the corresponding side limit plate 62, and the stirring rod 643 corresponds to the gap. The side limit plate 62 and the inner limit plate 63 on the corresponding side and the heating layer 42 form a heating channel. The flow area of ​​the heating channel gradually decreases in the direction away from the diverter plate 6. The cover plate 641 is located at one end of the heating channel away from the diverter plate 6 and corresponds to the channel opening. The channel opening area corresponding to the cover plate 641 is small, and it is difficult for unmelted raw material particles to flow out. The two heating channels are symmetrically distributed on the upper and lower sides of the diverter plate 6, and the solid melt mixing In the process of the material approaching the inner wall of the heating layer 42, it enters the two heating flow channels under the action of the diverter plate 6, and the molten material will flow out of the heating flow channel, while the unmelted solid plastic particles will be retained in the heating flow channel. The more solid particles in the heating flow channel, the greater the pressure on the surface of the heating layer 42. The heating layer 42 automatically adjusts the heating temperature according to the pressure (this is the prior art and will not be repeated here). The surface pressure of the heating layer 42 increases, and the temperature of the pressed part increases, thereby promoting the melting of the accumulated solid particles. The melted molten material is discharged from the heating flow channel, the pressure of the heating layer 42 returns to normal, and the temperature of the heating layer 42 also returns to normal, so that the unmelted solid plastic particles are heated in a direction, avoiding overheating of the molten material and causing decomposition of the plastic melt. , thereby improving the quality of injection molded products. During the melting process, the solid in the heating flow channel is continuously transformed into a molten material, which causes the pressure in the region to continuously change, thereby causing the pressure on the cover plate 641 to continuously change. The cover plate 641 is subjected to pressure, which continuously drives the connecting shaft 642 to rotate in a direction away from the heating flow channel. The connecting shaft 642 simultaneously drives the stirring rod 643 to rotate. The rotation of the stirring rod 643 will move the solid particles in the heating flow channel closer to the cover plate 641. Under the joint action of the stirring rod 643 and the flowing molten material, the fixed particles are gradually accumulated in the heating flow channel in a direction away from the cover plate 641. A detection plate 61 is fixedly installed on the top of the spiral plate 43. The detection plate 61 corresponds to the diversion mechanism and is located at the end of the cover plate 641 away from the diversion plate 6.The detection plate 61 is fixedly connected to the heating layer 42. When the molten material flows out from the heating flow channel, it will pass through the detection plate 61. The detection plate 61 is set to detect the flow rate of the molten material per unit time (this is a prior art and will not be repeated here). The fluidity of the molten material can be monitored in real time, which is very important for adjusting the temperature of the heating layer 42, because the fluidity of the molten material is closely related to the temperature. By detecting the flow rate, the state of the molten material can be effectively judged and the temperature can be adjusted in time to avoid the plastic molten material presenting physical properties similar to non-Newtonian fluids (such as poor or too fast fluidity), thereby ensuring the gas-liquid separation effect during the injection molding process and the quality of the final product.

[0042] A heating mechanism is arranged between the two corresponding upper and lower spiral plates 43, and the heating mechanism includes a heating block 73, and the heating block 73 is installed in the cooling cylinder 4 through a rotating assembly, and the rotating assembly includes a second motor 5, and a fixing rod 51 is fixedly installed on the outer wall of the cooling cylinder 4, and the second motor 5 is fixedly installed on the fixing rod 51, and the output end of the second motor 5 is fixedly connected with a heat insulating sleeve 7, and the heating block 73 is fixedly connected to the heat insulating sleeve 7, and the heat insulating sleeve 7 and the heating block 73 form a circular ring structure, and the inner wall of the heat insulating sleeve 7 is provided with a cooling assembly, and the cooling assembly includes a counterweight block 75 rotatably connected to the inner wall of the heat insulating sleeve 7, and the counterweight block 75 is fixedly installed with a cooling block 751, and the counterweight block 75 and the cooling block 751 form a cylindrical structure, and the side wall of the heat insulating sleeve 7 is fixedly installed with a guide The heat block 72 and the heat insulation sleeve 7 pass through the cooling cylinder 4, the insulation layer 41 and the heating layer 42, and are rotatably connected with the cooling cylinder 4, the insulation layer 41 and the heating layer 42. The heat conductive block 72 is located inside the cooling cylinder 4, corresponding to the cooling cylinder 4. A sealing plate 74 is fixedly installed at one end of the heat insulation sleeve 7 away from the second motor 5. An adjusting rod 741 is fixedly connected to one end of the sealing plate 74 away from the insulation sleeve 7. The adjusting rod 741 is threadedly rotatably connected with the guide plate 71. The top and bottom of the guide plate 71 are respectively slidably connected with the spiral plate 43 on the corresponding side. A limit block 742 is fixedly installed at one end of the adjusting rod 741 away from the sealing plate 74. The limit block 742 is located on the side of the guide plate 71 away from the sealing plate 74 to prevent the guide plate 71 from falling off the adjusting rod 741.

[0043] Under the action of centrifugation, the melt is divided into multiple layers: the outermost layer is a solid melt mixed layer, followed by a melt layer, then a melt-gas mixed layer, and the innermost layer is a gas layer. When the bubble separation effect is not good, the gas layer will become thinner, and the mixing effect of the gas and the melt will become worse. At this time, the melt-gas mixed layer becomes thicker, and the flow of bubbles in the melt will be resisted by the centrifugal force, making it difficult for the bubbles to rise quickly. The guide plate 71 can move along the adjustment rod 741 and always remain in the melt-gas mixed layer, thereby ensuring that the guide plate 71 is always in the area with more bubbles. In areas with more bubbles, the bubbles need more space to flow and rise. The guide plate 71 can play a diversion role, separating the melt from the gas in this area, and destroy the laminar state by introducing a turbulent state. Since the flow rate increases during the separation process, the melt changes from turbulent flow to laminar flow, and laminar flow is not conducive to gas-liquid separation. The guide plate 71 disturbs the flow of the melt so that the bubbles can rise better, thereby improving the gas-liquid separation effect and ensuring that the stratification of the melt and gas mixture is effective. It can improve subsequent processing processes (such as cooling, injection molding, etc.) and improve production efficiency and product quality.

[0044] At the same time, when the fluidity of the melt deteriorates, the resistance to the flow of the melt driven by centrifugal force will increase, and the flow speed of the melt will slow down, which will affect the smooth flow of the melt and the separation of bubbles. The second motor 5 drives the insulation sleeve 7 and the heating block 73 to rotate, which will make the heating block 73 finally stay in the direction facing the flow of the melt. At this time, the heating block 73 cannot contact the cooling block 751, avoiding interference with the cooling effect. By adjusting the relative position of the heating block 73 and the cooling block 751, precise control of the heating and cooling systems is ensured, and heat can be added when needed and heat waste can be avoided when not needed, thereby optimizing energy use. The counterweight block 75 has poor thermal conductivity and a low center of gravity, so that the counterweight block 75 and the cooling block 751 always maintain the same direction. The heating block 73 transfers its heat to the melt, quickly increases the temperature of the melt, and then improves its fluidity, thereby improving the rising speed of the bubbles, ensuring a more thorough gas-liquid separation, and avoiding uneven mixing of bubbles and the melt, which affects subsequent processes.

[0045] When the fluidity of the melt is better, its viscosity is lower, the flow is smoother, and the rising speed of the bubbles is faster, which is conducive to the separation of gas from the melt. Therefore, when the fluidity of the melt is better, the separation effect of gas and melt is usually better. The melt has good fluidity and the separation has been completed. Continuing to heat will cause the temperature of the melt to be too high, which may easily cause decomposition or other thermal damage to the melt. Therefore, it is necessary to quickly reduce the temperature of the heating block 73 to prevent the adverse consequences of continued heating. The purpose of quickly cooling the heating block 73 is to terminate the heating process and prevent the melt from being subjected to excessive heat energy input, thereby better controlling the temperature and fluidity of the melt.

[0046] The second motor 5 drives the heat insulation sleeve 7 and the heating block 73 to rotate, so that the heating surface of the heating block 73 originally facing the flow of the molten material turns to the direction opposite to the flow of the molten material. According to the pressure difference between the upstream surface and the downstream surface in fluid mechanics, the heating block 73 now faces the downstream surface, which will reduce the heat exchange efficiency with the molten material. The flow of the cylinder in the liquid will produce a pressure difference between the upstream surface and the downstream surface. Under normal circumstances, the upstream surface will be subject to a greater pressure, while the downstream surface will be under a smaller pressure. In heat exchange, the heat transfer efficiency of the upstream surface is usually higher than that of the downstream surface, because thermal disturbances in the flow direction are more likely to occur. It is easy to increase the thermal convection efficiency of the surface. After the heating block 73 rotates, the heat transfer to the molten material will be reduced when facing the back flow surface, because the back flow surface is less affected by the fluid disturbance, resulting in a decrease in the heat transfer efficiency, which helps to quickly stop the heating. The heating block 73 is in contact with the cooling block 751 at the same time. The cooling block 751 can quickly take away the heat of the heating block 73. The cooling block 751 transfers the heat to the heat conductive block 72, and then conducts the heat to the cooling cylinder 4 through the heat conductive block 72. Through this conduction process, the temperature of the heating block 73 will drop rapidly, thereby effectively controlling the temperature of the molten material and preventing overheating.

[0047] A recovery chamber is provided through the top of the inner cylinder 34, and a pumping pipe 32 is fixedly connected to the top of the inner cylinder 34, and the pumping pipe 32 is connected to the recovery chamber. One end of the pumping pipe 32 away from the inner cylinder 34 passes through the connecting cylinder 31 and is fixedly connected to the connecting cylinder 31. The outer wall of the pumping pipe 32 is sleeved with an insulation pipe 33, and the insulation pipe 33 is located outside the connecting cylinder 31. An injection molding area 12 is provided on the mounting frame, and the injection molding area 12 is located below the cooling cylinder 4 and is connected to the inside of the cooling cylinder 4. A return plate 35 is fixedly connected to the bottom of the inner cylinder 34 through the connecting frame. The return plate 35 is located below the recovery chamber and is connected to the inside of the recovery chamber. Under the action of centrifugal force, the gas (including bubbles) tends to the outer wall of the inner cylinder 34, and the gas and the melt containing bubbles will eventually pass through the return plate 35 into the recovery chamber The gas-containing parts do not enter the injection molding area 12, but are guided to the recovery chamber and recycled through the extraction pipe 32 for reuse. The gas-containing parts are recycled and reprocessed through the extraction pipe 32, which not only helps to remove bubbles, but also reduces material waste. The bubbles and impurities in the melt will have an adverse effect on the surface quality and physical properties (such as strength and transparency) of the injection molded products. By recycling and removing these undesirable components, the quality of the final injection molded products can be significantly improved, and voids, cracks or surface defects can be avoided. The function of the insulation pipe 33 is to ensure that the temperature of the waste (including gas and impurities) in the extraction pipe 32 is maintained within an appropriate range, thereby avoiding heat loss or solidification caused by a sudden drop in the temperature of the waste during the recycling process.

[0048] In the present invention, when it is necessary to produce injection molded parts, the raw materials are first poured into the feed hopper 21, and the first motor 2 is started by the controller 11, thereby driving the feed screw 22 to rotate. The raw materials enter the barrel 23 through the feed hopper 21 and are plasticized by the feed screw 22 and transmitted into the connecting barrel 31, and then fall onto the spiral plate 43.

[0049] The rotating shaft 3 is started by the controller 11, and the rotating shaft 3 drives the cooling cylinder 4 and then drives the spiral plate 43 to rotate. Under the action of centrifugal force, since the injection plastic is solid, the molten material and the residual gas inside have different densities, so they will gradually separate in the process of spirally moving along the spiral plate 43. The solid with high density will gradually move closer to the inner wall of the heating layer 42 under the action of centrifugal force, and the gas with low density will move closer to the outer wall of the inner cylinder 34 under the action of centrifugal force. Finally, the molten mixture with high gas and bubble content will enter the recovery chamber in the inner cylinder 34 through the reflux plate 35, and will finally be extracted through the extraction pipe 32 for recycling and reprocessing, so as to reduce material waste, thereby achieving the purpose of removing the gas inside the molten material.

[0050] When the solid approaches the inner wall of the heating layer 42, it will hit the diverter plate 6 and enter the heating flow channel along both sides of the diverter plate 6. The molten material will flow out of the heating flow channel, and the unmelted solid plastic particles will be left in the heating flow channel. The solid plastic will gradually accumulate in the heating flow channel. The more solid particles there are, the greater the pressure on the surface of the heating layer 42. The heating layer 42 automatically adjusts the heating temperature according to the pressure. The accumulation of solid particles increases the surface pressure of the heating layer 42, which increases the temperature of the pressurized part, thereby promoting the melting of the solid particles. The melted molten material will be discharged from the heating flow channel, the pressure will return to normal, and the temperature of the heating layer 42 will also return to normal, which is beneficial to the plastic melt internally due to heat. The unmelted solid plastic particles produced due to unevenness are heated in a directional manner, making the plastic melt more evenly, while avoiding overheating of the melt that may cause decomposition of the plastic melt, thereby improving the quality of the injection molded product and reducing losses. Since the solid in the heating flow channel is continuously converted into a melt during the melting process, the pressure in the area is continuously changing, so the pressure on the cover plate 641 is also continuously changing, and then the connecting shaft 642 is rotated to drive the stirring rod 643 to rotate along the axis of the connecting shaft 642. The stirring rod 643 will move the solid particles in the heating flow channel to move away from the diverter plate 6 for accumulation, which helps to further improve the directional heating effect of the heating layer 42 on the solid particles.

[0051] When the melt is heated in a directionally heated flow channel and no solid particles are present, the melt will pass through the detection plate 61, which can measure the flow rate of the liquid per unit time, and thus the fluidity of the internal melt. Since the effect of gas-liquid separation is related to the fluidity of the liquid, the plastic melt will exhibit physical properties similar to those of a non-Newtonian fluid if the temperature is not properly controlled, which will further affect the separation effect. Therefore, it is necessary to adjust the temperature of the melt in time.

[0052] When the fluidity of the melt is poor, the resistance to the movement of bubbles driven by centrifugal force is large. At this time, the second motor 5 will drive the insulation sleeve 7 and the heating block 73 to rotate, thereby causing the guide plate 71 to move toward the inner cylinder 34, so that the guide plate 71 always remains at the position of the melt with more bubbles. The function of the guide plate 71 is to divert the melt at this location and turn it back into a turbulent state to improve the separation effect of the melt and the gas at this location. When the fluidity of the melt deteriorates, the second motor 5 drives the insulation sleeve 7 and the heating block 73 to rotate, causing the heating block 73 to eventually stay in the direction facing the melt flow. At this time, the heating block 73 cannot contact the cooling block 751, and the heat of the heating block 73 will be quickly brought into the entire flow system through the oncoming melt, quickly raising the temperature to improve the fluidity of the melt.

[0053] When the melt has good fluidity, the separation effect of gas and melt will be better. At this time, the second motor 5 controls the heat insulation sleeve 7 and the heating block 73 to rotate, and drives the guide plate 71 to reset through the adjustment rod 741. The heating block 73 is rotated to a position close to the surface of the cooling block 751. The cooling block 751 conducts heat to the heat conduction block 72, and then conducts it to the cooling cylinder 4 to achieve the purpose of rapid cooling of the heating block 73. At the same time, the heating block 73 changes from the direction facing the melt to the back direction. According to fluid mechanics, the pressure of the cylinder on the water flow surface in the liquid will be greater than the back flow surface, and the smaller the pressure, the lower the efficiency of heat conduction, so that the heating block 73 can not only be quickly cooled by the cooling block 751 after rotation, but also reduce the heat transfer to the melt, so as to achieve the effect of quickly stopping heating and heating, and better control the temperature and fluidity of the melt. After separation, the melt will enter the injection molding area 12 to finally complete the injection molding process.

[0054] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An injection molding machine, comprising a base (1), a mounting frame being fixedly mounted on the top of the base (1), characterized in that: The mounting frame is provided with a conveying mechanism, and a barrel (23) is fixedly mounted on the mounting frame. The bottom of the barrel (23) is fixedly connected to a connecting barrel (31), and the connecting barrel (31) is rotatably connected to a cooling barrel (4) via a rotating shaft (3). The cooling barrel (4) is located below the connecting barrel (31) and is connected to the inside of the connecting barrel (31). An inner barrel (34) is vertically arranged inside the cooling barrel (4), and the inner barrel (34) is located at the center of the cooling barrel (4). The inner wall of the cooling barrel (4) is provided with a temperature insulation layer (41), and the inner wall of the temperature insulation layer (41) is provided with a heating layer (42), and the heating layer (42) adjusts the temperature according to the pressure; The outer wall of the inner cylinder (34) is linearly distributed with multiple groups of spiral plates (43) from top to bottom, and a heating mechanism is arranged between the upper and lower corresponding spiral plates (43), the spiral plates (43) are fixedly connected to the heating layer (42) and are rotatably connected to the inner cylinder (34), and the top plate of the spiral plates (43) is provided with a diversion mechanism; The diverter mechanism comprises a diverter plate (6), the diverter plate (6) is fixedly connected to the heating layer (42), two inner limit plates (63) are fixedly connected to the side wall of the diverter plate (6), the distance between the two inner limit plates (63) gradually increases in the direction away from the diverter plate (6), and the inner limit plate (63) is fixedly connected to the heating layer (42), and the two inner limit plates (63) are respectively installed with side limit plates (62) through a connecting assembly on the sides away from each other, and the side limit plates (62) are fixedly connected to the heating layer (42), and the side limit plates (62) and the inner limit plates (63) on the corresponding side and the heating layer (42) form a heating flow channel, and the flow area of ​​the heating channel gradually decreases in the direction away from the diverter plate (6); An injection molding area (12) is arranged on the mounting frame. The injection molding area (12) is located below the cooling cylinder (4) and is connected to the inside of the cooling cylinder (4). A recovery mechanism is arranged at the bottom of the inner cylinder (34).

2. The injection molding machine according to claim 1, characterized in that: A controller (11) is fixedly mounted on the side wall of the base (1); the conveying mechanism comprises a first motor (2) fixedly mounted on a mounting frame; a feeding screw (22) is fixedly connected to the bottom of the first motor (2); the barrel (23) is located below the first motor (2); the feeding screw (22) is located inside the barrel (23); and a feeding hopper (21) is fixedly connected to the side wall of the barrel (23).

3. The injection molding machine according to claim 1, characterized in that: The connecting assembly is located at one end of the inner limit plate (63) away from the diverter plate (6), and the connecting assembly comprises two mounting shafts (64). The two mounting shafts (64) are respectively fixedly connected to the inner limit plate (63) and the side limit plate (62). A connecting shaft (642) is rotatably connected between the two mounting shafts (64), and a stirring assembly is arranged on the connecting shaft (642).

4. The injection molding machine according to claim 3, characterized in that: The stirring assembly comprises a cover plate (641) and a stirring rod (643) fixedly mounted on the side wall of the connecting shaft (642); a gap is provided between the inner limit plate (63) and the corresponding side limit plate (62); the stirring rod (643) corresponds to the gap; the cover plate (641) is located at one end of the heating channel away from the diverter plate (6) and corresponds to the channel opening.

5. The injection molding machine according to claim 4, characterized in that: A detection plate (61) is fixedly mounted on the top of the spiral plate (43); the detection plate (61) corresponds to the diversion mechanism and is located at one end of the cover plate (641) away from the diversion plate (6); the detection plate (61) is fixedly connected to the heating layer (42); and the detection plate (61) is used to detect the flow rate of the molten material per unit time.

6. The injection molding machine according to claim 1, characterized in that: The heating mechanism comprises a heating block (73), and the heating block (73) is arranged in the cooling cylinder (4) through a rotating component. The rotating component comprises a second motor (5). A fixing rod (51) is fixedly installed on the outer wall of the cooling cylinder (4), and the second motor (5) is fixedly installed on the fixing rod (51). The output end of the second motor (5) is fixedly connected with a heat insulation sleeve (7). The heat insulation sleeve (7) passes through the cooling cylinder (4), the heat insulation layer (41) and the heating layer (42), and is rotationally connected with the cooling cylinder (4), the heat insulation layer (41) and the heating layer (42). The heating block (73) is fixedly connected with the heat insulation sleeve (7), and the heat insulation sleeve (7) and the heating block (73) form a circular ring structure. A heat conductive block (72) is fixedly installed on the side wall of the heat insulation sleeve (7), and the heat conductive block (72) corresponds to the cooling cylinder (4) and is located inside the cooling cylinder (4).

7. The injection molding machine according to claim 6, characterized in that: The inner wall of the thermal insulation sleeve (7) is provided with a cooling component, and the cooling component comprises a counterweight block (75) rotatably connected to the inner wall of the thermal insulation sleeve (7), and the counterweight block (75) is fixedly mounted with a cooling block (751), and the counterweight block (75) and the cooling block (751) form a cylindrical structure.

8. The injection molding machine according to claim 6, characterized in that: A sealing plate (74) is fixedly mounted on one end of the heat insulation sleeve (7) away from the second motor (5); an adjusting rod (741) is fixedly connected to one end of the sealing plate (74) away from the heat insulation sleeve (7); the adjusting rod (741) is threadedly connected to a guide plate (71); the top and bottom of the guide plate (71) are respectively slidably connected to the spiral plate (43) on the corresponding side; a limiting block (742) is fixedly mounted on one end of the adjusting rod (741) away from the sealing plate (74); the limiting block (742) is located on the side of the guide plate (71) away from the sealing plate (74).

9. The injection molding machine according to claim 1, characterized in that: The recovery mechanism comprises a recovery chamber arranged inside the inner cylinder (34); the bottom of the inner cylinder (34) is fixedly connected to a return plate (35) via a connecting frame; the return plate (35) is located below the recovery chamber and is in communication with the inside of the recovery chamber; and a material extraction mechanism is arranged at the top of the inner cylinder (34).

10. The injection molding machine according to claim 9, characterized in that: The material extraction mechanism comprises a material extraction pipe (32) fixedly connected to the top of the inner cylinder (34), the material extraction pipe (32) being in communication with the recovery chamber, the end of the material extraction pipe (32) away from the inner cylinder (34) passing through the connecting cylinder (31) and being fixedly connected to the connecting cylinder (31), the outer wall of the material extraction pipe (32) being sheathed with a heat preservation pipe (33), the heat preservation pipe (33) being located outside the connecting cylinder (31).

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