Integrated injection molding equipment for inner barrel of washing machine and demolding method

Abstract

The invention discloses washing machine inner barrel integral forming injection molding equipment and a demolding method.The washing machine inner barrel integral forming injection molding equipment comprises an upper mold base and a lower mold base, an injection molding opening used for inputting materials is formed in the top of the upper mold base, and the outer wall of one side of the upper mold base is fixedly connected with a water inlet pipe and a water outlet pipe; the side, away from the water inlet pipe and the water outlet pipe, of the upper die base is fixedly connected with a circulating pipe. A heat dissipation assembly is arranged on the circumferential outer wall of the circulating pipe; an expansion pipe is arranged in the middle of the circulating pipe, and the inner diameter of the expansion pipe is larger than that of the circulating pipe; a turbulent flow assembly is arranged in the circulating pipe, and a displacement assembly used for adjusting the turbulent flow effect of the turbulent flow assembly is arranged in the expansion pipe. Through efficient heat dissipation, uniform cooling and self-adaptive turbulent flow adjustment, the integrated forming quality of the inner barrel of the washing machine is guaranteed, product defects are reduced, meanwhile, the production efficiency is improved, and energy waste is reduced.

Description

Technical Field

[0001] This invention relates to the field of injection molding technology for washing machine inner drums, and more particularly to an injection molding equipment and demolding method for one-piece molding of washing machine inner drums. Background Technology

[0002] In the field of washing machine inner drum production, one-piece injection molding has become the mainstream production method because it can improve the stability of product structure and reduce assembly complexity. However, existing injection molding equipment still has many technical bottlenecks.

[0003] Traditional equipment cooling systems often employ a single-pipe cooling medium flow, with a simple heat dissipation structure design relying solely on ordinary flat heat sinks for heat exchange. This results in limited heat dissipation area and low heat exchange efficiency, failing to quickly dissipate the large amount of heat generated by the mold during injection molding. This not only prolongs the molding cycle of the inner cylinder product but also easily leads to uneven material solidification due to untimely cooling, affecting product dimensional accuracy and surface quality. Furthermore, the uniform flow pattern of the cooling medium within the pipe, lacking effective turbulence design, causes significant temperature differences in different areas of the cooling medium within the pipe, further exacerbating defects such as localized product deformation and inconsistent wall thickness, ultimately reducing the production yield.

[0004] Furthermore, the cooling adjustment mechanisms of existing injection molding equipment lack flexibility and are ill-suited to the varying heat dissipation requirements at different stages of the washing machine drum injection process. During the initial injection molding stage, the mold temperature is high and heat is concentrated, requiring rapid and efficient heat dissipation. However, as the mold temperature gradually decreases in the later stages of molding, the heat dissipation rate needs to be appropriately slowed to ensure uniform stress release within the product. Traditional equipment cannot automatically adjust the cooling intensity and medium flow rate based on real-time operating conditions such as mold temperature and cooling medium pressure, often using fixed heat dissipation parameters throughout the entire production process. This leads to either insufficient heat dissipation during high-temperature stages or energy waste during low-temperature stages. Simultaneously, the demolding process and cooling system of some equipment are poorly integrated, causing the product to easily adhere to the mold wall after cooling, resulting in scratches and damage during demolding, further hindering production efficiency and product quality improvement. Therefore, a one-piece injection molding equipment and demolding method for washing machine drums are urgently needed to solve these problems. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of existing technologies by proposing an injection molding equipment and demolding method for one-piece molding of a washing machine inner drum. Its advantages include: efficient heat dissipation, uniform cooling, and adaptive turbulence adjustment, ensuring the quality of the one-piece molding of the washing machine inner drum, reducing product defects, while simultaneously improving production efficiency and reducing energy waste.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: An injection molding equipment for one-piece molding of washing machine inner drum includes an upper mold base and a lower mold base. The top of the upper mold base is provided with an injection port for inputting materials. A water inlet pipe and a water outlet pipe are fixedly connected to one side of the outer wall of the upper mold base. A circulation pipe is fixedly connected to the side of the upper mold base away from the water inlet pipe and the water outlet pipe. The outer circumferential wall of the circulation pipe is provided with a heat dissipation component; An expansion tube is provided in the middle of the circulation tube, and the inner diameter of the expansion tube is larger than the inner diameter of the circulation tube. The circulation pipe is equipped with a flow-dispersing component, and the expansion pipe is equipped with a displacement component for adjusting the flow-dispersing effect of the flow-dispersing component.

[0007] Through the above technical solutions, an integrated cooling system of "cooling medium circulation, high-efficiency heat dissipation, and turbulence regulation" has been effectively constructed. The circulation pipe, as the carrier of the cooling medium, works in conjunction with heat dissipation components, turbulence components, and displacement components to achieve synergistic optimization of cooling efficiency, cooling uniformity, and adaptability to operating conditions, thus solving the problems of slow heat dissipation, uneven cooling, and rigid adjustment in traditional equipment.

[0008] Preferably, the heat dissipation assembly includes heat dissipation fins fixedly connected to the outer circumferential wall of the circulation pipe. The heat dissipation fins are spirally distributed on the outer circumferential wall of the circulation pipe, and the pitch of the heat dissipation fins gradually increases on the outer circumferential wall of the circulation pipe in a direction away from the expansion pipe.

[0009] Through the above technical solutions: the spirally distributed heat sink can guide the air to form a spiral airflow, prolong the contact time between the air and the heat sink, and improve the heat exchange efficiency. The design of the pitch gradually increasing along the direction away from the expansion tube is adapted to the law that the heat of the cooling medium gradually decreases after flowing out of the expansion tube, making the heat sink more densely distributed in the heat concentration area, making the heat exchange more targeted, and further improving the heat dissipation effect.

[0010] Preferably, the outer wall of the heat sink has equally spaced circularly distributed heat dissipation grooves, and the width of the heat dissipation grooves gradually increases in the direction away from the outer wall of the circulation pipe.

[0011] Through the above technical solutions: the setting of the heat dissipation slots greatly expands the contact area between the heat sink and the air, enhances the heat dissipation capacity, and the gradually increasing width design avoids airflow congestion in the slots, ensuring smooth airflow. At the same time, it makes the heat dissipation area at the outer end of the heat dissipation slots larger, further improving the heat dissipation efficiency.

[0012] Preferably, the inner walls on both sides of the heat dissipation groove are provided with equally spaced guide grooves, and the cross-section of the guide grooves is arc-shaped.

[0013] Through the above technical solutions: the arc-shaped guide channel can guide the airflow to flow smoothly along the channel wall, reduce wind resistance, avoid the formation of vortices in the airflow in the heat dissipation channel, and ensure continuous and efficient heat dissipation. At the same time, the guide channel increases the surface area of ​​the inner wall of the heat dissipation channel, further improving the heat exchange capacity and making the heat dissipation more uniform.

[0014] Preferably, the turbulence component includes a baffle plate fixedly connected to the inner circumference of the circulation pipe. The baffle plates are staggered inside the circulation pipe. The bottom of the baffle plate fixedly connected to the inner circumference of the upper circulation pipe forms a flow guiding gap with the inner wall of the bottom of the circulation pipe. The top of the baffle plate fixedly connected to the inner circumference of the lower circulation pipe forms another flow guiding gap with the inner wall of the top of the circulation pipe. The flow guiding gap and the other flow guiding gap are distributed in a wave-like shape inside the flow guiding groove.

[0015] Through the above technical solution: the staggered baffles form a wave-shaped flow channel, which forces the cooling medium to flow in a wave-like manner in the circulation pipe, breaking the traditional straight flow state, extending the residence time of the cooling medium in the pipe, ensuring that the cooling medium is in full contact with the inner wall of the circulation pipe, and absorbing more heat transferred from the mold. At the same time, the wave-like flow allows the cooling medium in different areas of the pipe to be fully mixed, avoiding excessive local temperature, ensuring cooling uniformity, and reducing product defects caused by uneven cooling.

[0016] Preferably, the expansion tube is provided with a piston tube inside, the end of the piston tube away from the heat sink is hemispherical, a connecting post is fixedly connected to one end of the piston tube, a through groove is fixedly connected to the inner circumference of the circulation tube, one end of the connecting post passes through the middle of the through groove, and the outer wall of the through groove is provided with equally spaced circular through grooves.

[0017] Through the above technical solutions: the hemispherical piston tube can reduce the resistance when the cooling medium flows, and prevent the medium from forming vortices in the expansion tube. The through groove provides stable support and movement guidance for the connecting column, and the circular through grooves on its outer wall ensure the normal flow of the cooling medium without affecting the circulation efficiency of the medium in the circulation tube, while providing sufficient space for the displacement of the piston tube.

[0018] Preferably, a spring is fitted around the outer circumference of the connecting column, and the two ends of the spring are respectively fixedly connected to the outer wall of one side of the through groove and the piston tube.

[0019] Through the above technical solution: the spring plays a buffering and resetting role. When the air pressure change in the circulation pipe pushes the piston tube to move, the spring can offset part of the impact force, avoid rigid collision between the piston tube and other components, and protect the equipment structure. When the air pressure returns to normal, the spring can drive the piston tube to quickly reset, ensuring the stable circulation of the displacement component's adjustment function and improving the service life and operational stability of the equipment.

[0020] Preferably, a limiting disk is fixedly connected to the end of the connecting column away from the piston tube, and the diameter of the limiting disk is larger than the diameter of the connecting column.

[0021] Through the above technical solutions, the limiting plate can restrict the movement of the connecting column, prevent the connecting column from coming out of the through groove due to excessive air pressure in the circulation pipe, ensure the connection stability of the piston tube, connecting column and through groove, prevent the displacement component from failing, and ensure the normal operation of the equipment.

[0022] Preferably, the displacement assembly includes a movable column fixedly connected to one end of the piston tube, a through hole is provided on one side of the fixed plate, one end of the movable column passes through the inside of the through hole, an adjustment hole is provided on one side of the outer wall of the partition, and an equal-distance distribution of adjustment protrusions is fixedly connected to the circumferential outer wall of the movable column. The cross-section of the adjustment protrusion is an isosceles trapezoid, and the adjustment protrusion is located inside the adjustment hole.

[0023] Through the above technical solutions: the fixed plate and through hole provide stable support and guidance for the movable column, ensuring that the movable column moves smoothly and synchronously with the piston tube. When the isosceles trapezoidal adjustment protrusion moves within the adjustment hole, it can flexibly adjust the flow cross-sectional area of ​​the cooling medium by changing the degree of contact with the inner wall of the adjustment hole, thereby adjusting the turbulence effect and realizing the dynamic matching of the cooling medium flow rate and heat dissipation requirements, adapting to the working conditions of different injection molding stages.

[0024] A demolding method for an injection molding equipment for an integrally molded inner drum of a washing machine, applied to the injection molding equipment for an integrally molded inner drum of a washing machine described in the above embodiments, includes the following steps: S1: After the inner drum of the washing machine is cooled and formed in the mold, stop feeding material into the injection port and at the same time shut off the cooling medium supply to the water inlet pipe. S2: Control the separation of the upper mold base and the lower mold base, so that the mold is in the open state, and the injection part is initially separated from the inner wall of the mold after cooling. S3: With the help of the equipment's preset lifting mechanism, the injection molded part is slowly pushed from one side of the lower mold base. Combined with the slight cooling effect of the residual cooling medium in the circulation pipe, the product is prevented from deforming during demolding. S4: After the injection molded part has completely detached from the mold, remove the product and clean the mold cavity to prepare for the next injection molding.

[0025] The beneficial effects of this invention are as follows: 1. A one-piece injection molding equipment and demolding method for a washing machine inner drum, comprising a heat dissipation component, wherein the heat dissipation fins on the outer circumference of the circulation pipe can increase the contact area with air, thereby improving the heat exchange effect between the cooling medium after heat absorption and the outside air. At the same time, the entire heat dissipation fins are spirally distributed on the outer circumference of the circulation pipe, thereby guiding the air to form a spiral airflow, extending the contact time between the air and the heat dissipation fins, and further improving the heat dissipation efficiency. Moreover, the pitch of the heat dissipation fins gradually increases along the direction away from the expansion pipe, which can adapt to the characteristic of the heat gradually decreasing during the flow of the cooling medium, making the heat exchange more targeted and efficient. Meanwhile, the equidistant circular heat dissipation grooves opened on the outer wall of the heat dissipation fins have a width that gradually increases along the direction away from the outer wall of the circulation pipe, which can further expand the heat dissipation area. The arc-shaped guide grooves on both sides of the inner wall of the heat dissipation grooves can guide the airflow smoothly, reduce wind resistance, and make the heat dissipation more uniform.

[0026] 2. A one-piece injection molding equipment and demolding method for a washing machine inner drum, which is equipped with a turbulence component. When the cooling medium flows inside the circulation pipe, the wave-shaped flow guide gap formed by the staggered upper and lower baffles inside the circulation pipe will generate a turbulence effect on the cooling medium, prolong its residence time in the pipe, ensure that the cooling medium fully absorbs heat, and avoid defects such as deformation and inconsistent wall thickness of the inner drum product due to uneven local cooling.

[0027] 3. A one-piece injection molding equipment and demolding method for a washing machine inner drum, comprising a displacement component. When the pressure of the cooling medium changes, the piston tube inside the expansion tube drives the connecting column to move along the through groove. The spring on the connecting column acts as a buffer and reset mechanism, and the limiting plate prevents the connecting column from falling off. Simultaneously, the movable column at one end of the piston tube moves accordingly, causing the isosceles trapezoidal adjusting protrusion on the movable column to move within the adjusting hole of the partition plate. When the air pressure in the circulation pipe increases due to high temperature, the movable column drives the adjusting protrusion to move laterally. At this time, the small end of the adjusting protrusion gradually approaches the adjusting hole, thereby effectively increasing the flow rate of the medium in the adjusting hole, accelerating the circulation speed of the cooling medium, and enabling faster heat dissipation from the mold. The flow rate is reduced to further improve heat dissipation efficiency to adapt to high-temperature conditions. When the air pressure in the circulation pipe decreases, the spring returns to its original position, causing the piston tube and movable column to move in the opposite direction. The large end of the adjusting protrusion moves closer to the adjusting hole, appropriately reducing the medium flow rate and extending the heat exchange time of the cooling medium in the pipe, thus ensuring the stability of the cooling effect. This structure, which automatically adjusts with pressure, allows the equipment to flexibly adapt to the heat dissipation requirements of different molding stages. It avoids product defects caused by untimely heat dissipation at high temperatures and prevents energy waste caused by excessively fast medium flow rate at low temperatures. Ultimately, while ensuring the one-piece molding quality of the washing machine inner drum and reducing problems such as deformation and uneven wall thickness, it further optimizes production efficiency and improves the adaptability and practicality of the equipment. Attached Figure Description

[0028] Figure 1This is a schematic diagram of the overall back structure of an injection molding equipment and demolding method for an integrated inner drum of a washing machine proposed in this invention; Figure 2 This invention provides an injection molding equipment and demolding method for one-piece molding of a washing machine inner drum. Figure 1 Enlarged structural diagram at point A; Figure 3 This is a schematic diagram of the overall front structure of an injection molding equipment and demolding method for an integrated inner drum of a washing machine proposed in this invention; Figure 4 This is a schematic cross-sectional view of the circulation pipe structure of an injection molding equipment and demolding method for an integrated inner drum of a washing machine proposed in this invention. Figure 5 This invention provides an injection molding equipment and demolding method for one-piece molding of a washing machine inner drum. Figure 4 Enlarged structural diagram at point A; Figure 6 This is a top view of the overall structure of the circulation pipe after cross-section of the injection molding equipment and demolding method for an integrated inner drum of a washing machine proposed in this invention. Figure 7 This is a magnified structural diagram of the displacement component of the one-piece injection molding equipment and demolding method for the inner drum of a washing machine proposed in this invention. Figure 8 This invention provides an injection molding equipment and demolding method for one-piece molding of a washing machine inner drum. Figure 7 A magnified structural diagram at point B in the middle.

[0029] In the diagram: 1. Upper mold base; 2. Lower mold base; 3. Injection port; 4. Circulation pipe; 5. Expansion pipe; 6. Heat sink; 7. Guide channel; 8. Heat dissipation channel; 9. Water inlet pipe; 10. Water outlet pipe; 11. Piston pipe; 12. Connecting column; 13. Spring; 14. Fixed plate; 15. Through groove; 16. Limiting plate; 17. Partition plate; 18. Adjustment hole; 19. Movable column; 20. Adjustment protrusion; 21. Through hole. Detailed Implementation

[0030] The technical solution of this patent will be further described in detail below with reference to specific embodiments.

[0031] The embodiments of this patent are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this patent, and should not be construed as limiting this patent.

[0032] In the description of this patent, it should be understood that the terms “center,” “upper,” “lower,” “front,” “back,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this patent and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this patent.

[0033] In the description of this patent, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection or setting, a detachable connection or setting, or an integral connection or setting. Those skilled in the art can understand the specific meaning of the above terms in this patent according to the specific circumstances.

[0034] Reference Figures 1-8 An injection molding equipment for one-piece molding of washing machine inner drum includes an upper mold base 1 and a lower mold base 2. The top of the upper mold base 1 is provided with an injection port 3 for inputting materials. A water inlet pipe 9 and a water outlet pipe 10 are fixedly connected to one side of the outer wall of the upper mold base 1, and a circulation pipe 4 is fixedly connected to the side of the upper mold base 1 away from the water inlet pipe 9 and the water outlet pipe 10. A heat dissipation component is provided on the outer circumferential wall of the circulation pipe 4; An expansion tube 5 is provided in the middle of the circulation tube 4, and the inner diameter of the expansion tube 5 is larger than the inner diameter of the circulation tube 4. The circulation pipe 4 is equipped with a turbulence-inducing component, and the expansion pipe 5 is equipped with a displacement component for adjusting the turbulence-inducing effect of the turbulence-inducing component. The circulation pipe 4, as the flow carrier of the cooling medium, together with the heat dissipation component, the turbulence-inducing component and the displacement component, achieves synergistic optimization of cooling efficiency, cooling uniformity and working condition adaptability, and solves the problems of slow heat dissipation, uneven cooling and rigid adjustment of traditional equipment.

[0035] Furthermore, the heat dissipation component includes heat sinks 6 fixedly connected to the outer circumference of the circulation pipe 4. The heat sinks 6 are spirally distributed on the outer circumference of the circulation pipe 4, and the pitch of the heat sinks 6 gradually increases on the outer circumference of the circulation pipe 4 in the direction away from the expansion pipe 5. The spirally distributed heat sinks 6 can guide the air to form a spiral airflow, prolong the contact time between the air and the heat sinks 6, and improve the heat exchange efficiency. The design of the pitch gradually increasing in the direction away from the expansion pipe 5 is adapted to the law that the heat of the cooling medium gradually decreases after flowing out of the expansion pipe 5, making the distribution of the heat sinks 6 more dense in the heat concentration area, making the heat exchange more targeted, and further improving the heat dissipation effect.

[0036] Furthermore, the outer wall of the heat sink 6 is provided with equally spaced circular heat dissipation grooves 8. The width of the heat dissipation grooves 8 gradually increases along the direction away from the outer wall of the circulation pipe 4. The setting of the heat dissipation grooves 8 greatly expands the contact area between the heat sink 6 and the air, enhances the heat dissipation capacity, and the gradually increasing width design avoids airflow congestion in the grooves, ensuring smooth airflow. At the same time, it makes the heat dissipation area at the outer end of the heat dissipation grooves larger, further improving the heat dissipation efficiency.

[0037] Furthermore, both sides of the heat dissipation slot 8 are provided with equally spaced guide channels 7. The cross-section of the guide channel 7 is arc-shaped. The arc-shaped guide channel 7 can guide the airflow to flow smoothly along the channel wall, reduce wind resistance, and prevent the airflow from forming vortices in the heat dissipation slot 8, ensuring continuous and efficient heat dissipation. At the same time, the guide channel 7 increases the surface area of ​​the inner wall of the heat dissipation slot 8, further improving the heat exchange capacity and making the heat dissipation more uniform.

[0038] Furthermore, the flow-disrupting component includes baffles 17 fixedly connected to the inner circumference of the circulation pipe 4. The baffles 17 are staggered inside the circulation pipe 4. The bottom of the baffle 17 fixedly connected to the inner circumference of the circulation pipe 4 forms a flow-guiding gap with the inner wall of the bottom of the circulation pipe 4, and the top of the baffle 17 fixedly connected to the inner circumference of the circulation pipe 4 forms another flow-guiding gap with the inner wall of the top of the circulation pipe 4. The flow-guiding gaps and the other flow-guiding gap are distributed in a wave-like pattern inside the flow-guiding groove 7. The staggered baffles 17 form a wave-shaped flow-guiding channel, which forces the cooling medium to flow in a wave-like pattern inside the circulation pipe 4, breaking the traditional straight flow state, prolonging the residence time of the cooling medium in the pipe, ensuring that the cooling medium is in full contact with the inner wall of the circulation pipe 4, and absorbing more heat transferred from the mold. At the same time, the wave-like flow makes the cooling medium in different areas of the pipe fully mixed, avoiding local overheating, ensuring cooling uniformity, and reducing defects caused by uneven cooling in the product.

[0039] Furthermore, a piston tube 11 is provided inside the expansion tube 5. The end of the piston tube 11 away from the heat sink 6 is hemispherical. A connecting post 12 is fixedly connected to one end of the piston tube 11. A through groove 15 is fixedly connected to the inner circumference of the circulation tube 4. One end of the connecting post 12 passes through the middle of the through groove 15. The outer wall of the through groove 15 has equally spaced circularly distributed through grooves 15. The hemispherical piston tube 11 can reduce the resistance when the cooling medium flows and prevent the medium from forming vortices in the expansion tube 5. The through groove 15 provides stable support and movement guidance for the connecting post 12. The circularly distributed through grooves 15 on its outer wall also ensure the normal flow of the cooling medium and do not affect the circulation efficiency of the medium in the circulation tube 4. At the same time, it provides sufficient space for the displacement of the piston tube 11.

[0040] Furthermore, a spring 13 is sleeved on the outer circumference of the connecting column 12. The two ends of the spring 13 are fixedly connected to the outer wall of the through groove 15 and the piston tube 11 respectively. The spring 13 plays a role in buffering and resetting. When the air pressure in the circulation pipe 4 changes and pushes the piston tube 11 to move, the spring 13 can offset part of the impact force, avoid the piston tube 11 from rigidly colliding with other components, and protect the equipment structure. When the air pressure returns to normal, the spring 13 can drive the piston tube 11 to quickly reset, ensuring the stable circulation of the adjustment function of the displacement component and improving the service life and operational stability of the equipment.

[0041] Furthermore, a limiting plate 16 is fixedly connected to the end of the connecting column 12 away from the piston tube 11. The diameter of the limiting plate 16 is larger than the diameter of the connecting column 12. The limiting plate 16 can limit the movement stroke of the connecting column 12, preventing the connecting column 12 from coming out of the through groove 15 due to excessive air pressure in the circulation pipe 4. This ensures the connection stability of the piston tube 11, the connecting column 12 and the through groove 15, prevents the displacement component from failing, and ensures the normal operation of the equipment.

[0042] Furthermore, the displacement assembly includes a movable column 19 fixedly connected to one end of the piston tube 11. A through hole 21 is provided on one side of the fixed plate 14, and one end of the movable column 19 passes through the interior of the through hole 21. An adjustment hole 18 is provided on the outer wall of one side of the partition plate 17. Adjustment protrusions 20 are fixedly connected to the circumferential outer wall of the movable column 19 at equal intervals. The cross-section of the adjustment protrusions 20 is an isosceles trapezoid. The adjustment protrusions 20 are located inside the adjustment hole 18. The fixed plate 14 and the through hole 21 provide stable support and guidance for the movable column 19, ensuring that the movable column 19 moves synchronously and smoothly with the piston tube 11. When the isosceles trapezoidal adjustment protrusions 20 are displaced within the adjustment hole 18, they can flexibly adjust the flow cross-sectional area of ​​the cooling medium by changing the degree of contact with the inner wall of the adjustment hole 18, thereby adjusting the turbulence effect and realizing the dynamic matching of the cooling medium flow rate and heat dissipation requirements, adapting to the working conditions of different injection molding stages.

[0043] A demolding method for an injection molding equipment for an integrally molded inner drum of a washing machine, applied to the injection molding equipment for an integrally molded inner drum of a washing machine described in the above embodiments, includes the following steps: Step 1: After the inner drum of the washing machine has cooled and formed in the mold, stop feeding material into the injection port 3 and at the same time shut off the cooling medium supply to the water inlet pipe 9. Step 2: Control the separation of the upper mold base 1 and the lower mold base 2, so that the mold is in the open state, and use the gap between the injection molded part and the inner wall of the mold after cooling to initially separate them; Step 3: Using the equipment's preset lifting mechanism, slowly push the injection molded part from one side of the lower mold base 2. Combined with the slight cooling effect of the residual cooling medium in the circulation pipe 4, this prevents the product from deforming during demolding. Step 4: After the injection molded part has completely detached from the mold, remove the product and clean the mold cavity to prepare for the next injection molding.

[0044] Working principle: When this injection molding equipment is working, the injection material is first fed into the mold through the injection port 3 at the top of the upper mold base 1. At the same time, the cooling medium is introduced into the circulation pipe 4 through the water inlet pipe 9. During the flow of the cooling medium in the circulation pipe 4, it can effectively absorb the heat transferred by the mold, thereby accelerating the rapid molding of the inner cylinder product. Meanwhile, the heat sink 6 on the outer circumference of the circulation pipe 4 can increase the contact area with the air, improve the heat exchange effect between the cooled medium after heat absorption and the outside air. At the same time, the entire heat sink 6 is spirally distributed on the outer circumference of the circulation pipe 4, thereby guiding the air to form a spiral airflow, prolonging the contact time between the air and the heat sink 6, further improving the heat dissipation efficiency. Moreover, the pitch of the heat sink 6 gradually increases in the direction away from the expansion pipe 5, which can adapt to the characteristic of the heat gradually decreasing during the flow of the cooling medium, making the heat exchange more targeted and efficient. Meanwhile, the equidistant circular heat dissipation grooves 8 on the outer wall of the heat sink 6 gradually increase in width along the direction away from the outer wall of the circulation pipe 4, which can further expand the heat dissipation area. The arc-shaped flow guide grooves 7 on both sides of the inner wall of the heat dissipation grooves 8 can guide the airflow smoothly, reduce wind resistance and make the heat dissipation more even. In addition, when the cooling medium flows inside the circulation pipe 4, the wave-shaped flow guide gap formed by the upper and lower staggered baffles 17 inside the circulation pipe 4 will generate a turbulent effect on the cooling medium, prolong its residence time in the pipe, ensure that the cooling medium fully absorbs heat, and avoid defects such as deformation and inconsistent wall thickness in the inner cylinder product due to uneven local cooling. When the pressure of the cooling medium changes, the piston tube 11 inside the expansion tube 5 drives the connecting column 12 to move along the through groove 15. The spring 13 on the connecting column 12 can act as a buffer and reset, and the limiting plate 16 can prevent the connecting column 12 from falling off. At the same time, the movable column 19 at one end of the piston tube 11 will move accordingly, causing the isosceles trapezoidal adjusting protrusion 20 on the movable column 19 to move within the adjusting hole 18 of the partition plate 17. When the air pressure in the circulation tube 4 increases due to high temperature, the movable column 19 will drive the adjusting protrusion 20 to move laterally together. At this time, the small end of the adjusting protrusion 20 will gradually approach the adjusting hole 18, thereby effectively increasing the flow rate of the medium in the adjusting hole 18, accelerating the circulation speed of the cooling medium, and more quickly removing the heat from the mold. This further improves heat dissipation efficiency to adapt to high-temperature conditions. When the air pressure in the circulation pipe 4 decreases, the spring 13 resets, causing the piston pipe 11 and the movable column 19 to move in opposite directions. The large end of the adjusting protrusion 20 approaches the adjusting hole 18, appropriately reducing the medium flow rate and extending the heat exchange time of the cooling medium in the pipe, thus ensuring the stability of the cooling effect. This structure, which automatically adjusts with pressure, allows the equipment to flexibly adapt to the heat dissipation requirements of different molding stages. It avoids product defects caused by untimely heat dissipation at high temperatures and prevents energy waste caused by excessively fast medium flow rate at low temperatures. Ultimately, while ensuring the one-piece molding quality of the washing machine inner drum and reducing problems such as deformation and uneven wall thickness, it further optimizes production efficiency and improves the adaptability and practicality of the equipment.

[0045] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A one-piece injection molding equipment for a washing machine inner drum, comprising an upper mold base (1) and a lower mold base (2), characterized in that, The top of the upper mold base (1) is provided with an injection port (3) for inputting materials. A water inlet pipe (9) and a water outlet pipe (10) are fixedly connected to one side of the outer wall of the upper mold base (1). A circulation pipe (4) is fixedly connected to the side of the upper mold base (1) away from the water inlet pipe (9) and the water outlet pipe (10). The outer circumferential wall of the circulation pipe (4) is provided with a heat dissipation component; An expansion tube (5) is provided in the middle of the circulation tube (4), and the inner diameter of the expansion tube (5) is larger than the inner diameter of the circulation tube (4). The circulation pipe (4) is equipped with a turbulence-inducing component inside, and the expansion pipe (5) is equipped with a displacement component for adjusting the turbulence-inducing effect of the turbulence-inducing component inside.

2. The one-piece injection molding equipment for a washing machine inner drum according to claim 1, characterized in that, The heat dissipation assembly includes a heat sink (6) fixedly connected to the outer circumference of the circulation pipe (4). The heat sink (6) is spirally distributed on the outer circumference of the circulation pipe (4), and the pitch of the heat sink (6) gradually increases on the outer circumference of the circulation pipe (4) in a direction away from the expansion pipe (5).

3. The one-piece injection molding equipment for a washing machine inner drum according to claim 2, characterized in that, The outer wall of the heat sink (6) is provided with heat dissipation grooves (8) that are distributed in a circular pattern at equal intervals. The width of the heat dissipation grooves (8) gradually increases in the direction away from the outer wall of the circulation pipe (4).

4. The one-piece injection molding equipment for a washing machine inner drum according to claim 3, characterized in that, The heat dissipation groove (8) has equally spaced guide grooves (7) on both sides of its inner wall, and the cross-section of the guide groove (7) is arc-shaped.

5. The one-piece injection molding equipment for a washing machine inner drum according to claim 4, characterized in that, The turbulence assembly includes a baffle (17) fixedly connected to the inner circumference of the circulation pipe (4). The baffle (17) is staggered inside the circulation pipe (4). The bottom of the baffle (17) fixedly connected to the inner circumference of the upper circulation pipe (4) forms a flow guiding gap with the inner wall of the bottom of the circulation pipe (4). The top of the baffle (17) fixedly connected to the inner circumference of the lower circulation pipe (4) forms another flow guiding gap with the inner wall of the top of the circulation pipe (4). The flow guiding gap and the other flow guiding gap are distributed in a wave shape inside the flow guiding groove (7).

6. The one-piece injection molding equipment for a washing machine inner drum according to claim 5, characterized in that, The expansion tube (5) is provided with a piston tube (11). The end of the piston tube (11) away from the heat sink (6) is hemispherical. A connecting post (12) is fixedly connected to one end of the piston tube (11). A through groove (15) is fixedly connected to the inner circumference of the circulation tube (4). One end of the connecting post (12) passes through the middle of the through groove (15). The outer wall of the through groove (15) is provided with equally spaced circular through grooves (15).

7. The one-piece injection molding equipment for a washing machine inner drum according to claim 6, characterized in that, A spring (13) is sleeved on the outer circumference of the connecting column (12), and the two ends of the spring (13) are respectively fixedly connected to the outer side of the through groove (15) and the piston tube (11).

8. The one-piece injection molding equipment for a washing machine inner drum according to claim 7, characterized in that, The end of the connecting column (12) away from the piston tube (11) is fixedly connected to a limiting disk (16), the diameter of which is larger than the diameter of the connecting column (12).

9. The one-piece injection molding equipment for a washing machine inner drum according to claim 8, characterized in that, The displacement assembly includes a movable column (19) fixedly connected to one end of the piston tube (11). A through hole (21) is provided on one side of the fixed plate (14). One end of the movable column (19) passes through the inside of the through hole (21). An adjustment hole (18) is provided on one side of the outer wall of the partition plate (17). An equally spaced adjustment protrusion (20) is fixedly connected to the circumferential outer wall of the movable column (19). The cross-section of the adjustment protrusion (20) is an isosceles trapezoid. The adjustment protrusion (20) is located inside the adjustment hole (18).

10. A demolding method for an integrated molding injection equipment for a washing machine inner drum, applied to the integrated molding injection equipment for a washing machine inner drum as described in claim 9, characterized in that, Includes the following steps: S1: After the inner drum of the washing machine is cooled and formed in the mold, stop feeding material into the injection port (3) and at the same time shut off the cooling medium supply of the water inlet pipe (9); S2: Control the separation of the upper mold base (1) and the lower mold base (2) so that the mold is in the open state and the injection part is initially separated from the inner wall of the mold after cooling. S3: With the help of the equipment’s preset lifting mechanism, the injection molded part is slowly pushed from the side of the lower mold base (2). Combined with the slight cooling effect of the residual cooling medium in the circulation pipe (4), the product is prevented from deforming during demolding. S4: After the injection molded part has completely detached from the mold, remove the product and clean the mold cavity to prepare for the next injection molding.

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