Top cover machining die and machining process

Abstract

The invention provides a top cover machining mold and a machining process, and relates to the technical field of washing machine top cover machining molds, the top cover machining mold comprises a sliding plate, an extrusion mold is installed on the surface of the sliding plate, a pressed mold is installed on the surface of a limiting plate, and a hydraulic telescopic rod is arranged between the sliding plate and a fixing plate; wherein the hydraulic telescopic rod can drive the sliding plate to slide along the rail rod to drive the extrusion mold to press on the pressed mold so as to press plastic into sheets, and a demolding part is arranged on the surface of the limiting plate. By means of magnetic attraction matching of a first magnetic block and a second magnetic block in the locking part and the elastic effect of a pulling spring, automatic plugging and conduction of the hose are achieved, demolding driving can be completed without an additional power source and a control element, and the ejection action of the push-out rod is smooth and good in synchronism.

Description

Technical Field

[0001] This invention relates to the field of washing machine top cover processing mold technology, and in particular to a top cover processing mold and processing technology. Background Technology

[0002] As a key appearance and functional component of the washing machine, the molding quality of the washing machine lid directly affects the overall performance and user experience. Currently, the industry generally uses plastic compression molding to produce washing machine lids, with the core processing equipment being the lid processing mold. Existing lid processing molds typically include core components such as a fixed plate, a limiting plate, an extrusion mold, a pressure mold, a drive mechanism, and a demolding mechanism. During operation, the drive mechanism drives the extrusion mold and the pressure mold to close, pressing the plastic raw material into a lid blank of a preset shape. Then, the demolding mechanism removes the molded blank from the mold cavity, completing one processing cycle.

[0003] Traditional demolding mechanisms rely on additional control components and power sources, such as solenoid valves and drive motors, for the opening and closing of air passages. This not only leads to complex mold structures and increased manufacturing costs, but also requires additional control systems to achieve coordinated actions, resulting in high energy consumption and more potential failure points. In large-scale production scenarios, failures of control components or power sources can easily cause production line shutdowns and affect production efficiency. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a top cover processing mold and processing technology.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a top cover processing mold, comprising a fixed plate and a limiting plate, wherein the fixed plate and the limiting plate are arranged opposite each other in the vertical direction, and are fixedly connected by circumferentially distributed support frames, together forming a square frame-shaped mold main structure; at least two track rods are arranged parallel to each other in the horizontal direction inside the square frame, and the two ends of the track rods are respectively fixedly connected to the inner surface of the fixed plate and the inner surface of the limiting plate; a sliding plate is slidably connected to the surface of the track rod along its axial direction, and an extrusion mold is detachably installed on the side surface of the sliding plate facing the limiting plate; the limiting plate faces the sliding plate... A pressure mold is fixedly installed on one side surface of the sliding plate, corresponding to the position of the extrusion mold; at least two hydraulic telescopic rods are evenly arranged along the axial direction of the track rod between the sliding plate and the fixed plate. The fixed end of the hydraulic telescopic rod is fixed to the fixed plate, and the telescopic end is fixed to the sliding plate. It can drive the sliding plate to make reciprocating linear motion along the track rod, thereby driving the extrusion mold to press towards the pressure mold, and pressing the plastic raw material placed between the two into a sheet; the side surface of the limiting plate facing the sliding plate is also provided with a demolding part. The demolding part is set corresponding to the cavity of the pressure mold, and can eject the plastic sheet pressed in the pressure mold from the cavity during the demolding stage to complete the demolding.

[0006] Preferably, the demolding part includes an air-injection part, which is embedded inside the limiting plate and compresses air synchronously with the closing action of the pressure mold and the extrusion mold; the air outlet of the air-injection part is connected to the telescopic part through a locking part, and the telescopic part is horizontally fixed to the side of the limiting plate by a fixing bracket, with its output end facing the inside of the mold; at least two ejector rods are slidably inserted into the limiting plate along its thickness direction, the inner end of the ejector rods extends to the bottom of the cavity of the pressure mold, and the outer end is fixedly connected to an assembly plate; a reset sleeve is fitted on the surface of the ejector rods. The spring has one end abutting against the outer surface of the limiting plate and the other end abutting against the inner surface of the assembly plate; the output end of the telescopic part is fixedly connected to the outer surface of the assembly plate; when the pressure mold separates from the extrusion mold with the movement of the sliding plate, the locking part opens synchronously, the compressed air in the air pumping part enters the telescopic part, drives the telescopic part to extend in the horizontal direction and extrude the assembly plate, the assembly plate drives the ejector rod to slide into the cavity along the thickness direction of the limiting plate, and at the same time compresses the return spring, and finally pushes the plastic sheet out from the cavity of the pressure mold through the ejector rod.

[0007] Preferably, the air-inflating part includes a cylinder, which is embedded inside the limiting plate, and its telescopic end extends toward the extrusion mold and is fixedly connected to the extrusion rod; a first spring is provided inside the cylinder along its telescopic direction, one end of the first spring is fixed to the bottom of the cylinder and the other end is fixed to the telescopic end, so that when the extrusion mold is separated from the pressure mold, the cylinder and the extrusion rod can be driven to reset along the demolding direction.

[0008] Preferably, the locking part includes a mounting block, which is detachably fixed to the side of the limiting plate. The mounting block has a sliding cavity and a horizontal hole inside. The sliding cavity is vertically oriented, and the horizontal hole passes through the mounting block and the sliding block horizontally, with the two arranged perpendicularly. A sliding block is slidably connected vertically inside the sliding cavity. A flexible tube passes through the horizontal hole, with one end connected to the air outlet of the air inflator and the other end connected to the air inlet of the telescopic part. A tension spring is provided between the bottom of the sliding block and the bottom of the sliding cavity. The tension spring is always in a stretched state, driving the sliding block to press the flexible tube to achieve a seal. A second mounting plate is fixedly installed on the side of the sliding plate corresponding to the position of the sliding block. A magnetic block is fixedly connected to the top of the sliding block. The magnetic attraction surfaces of the first and second magnetic blocks are arranged opposite each other. When the extrusion mold and the pressure mold are closed, the first and second magnetic blocks are magnetically attracted to each other, and the tension spring remains stretched. When the extrusion mold and the pressure mold begin to separate, the first magnetic block, under the magnetic attraction of the second magnetic block, drives the sliding block to slide upward against the elastic force of the tension spring, and the hose is unblocked and connected. As the extrusion mold and the pressure mold continue to separate, the extrusion rod returns to its original position under the elastic force of the first spring, and the push rod gradually retracts with the return spring until the first and second magnetic blocks disengage. The sliding block returns to its original position under the action of the tension spring and re-blocks the hose.

[0009] Preferably, the telescopic part includes a slide tube, which is fixedly connected to the fixing frame in the horizontal direction. A piston is slidably connected inside the slide tube in the axial direction. An air chamber is formed between one side surface of the piston and the bottom of the slide tube, and the air chamber is connected to the air inflator through a hose. A push rod is fixedly connected to the center of the other side surface of the piston. The end of the push rod away from the piston passes through the opening of the slide tube and is fixedly connected to the assembly plate.

[0010] Preferably, a lubrication port is provided at the top of the end of the slide tube away from the assembly plate. The lubrication port is connected to the interior of the slide tube, and lubricating oil can be injected into the interior of the slide tube through the lubrication port to lubricate the piston and the inner wall of the slide tube.

[0011] Preferably, the outer surface of the support frame is provided with a track groove along its height direction, and a shielding door is slidably connected in the track groove; the shielding door can slide up and down along the track groove, and slides to the outer circumference of the extrusion mold and the pressure mold during mold closing processing to form a closed protective space, blocking the exposed parts of the extrusion mold and the pressure mold, and avoiding injury to the workers.

[0012] Preferably, the sliding plate has a cooling section inside, which is set at the installation position of the extrusion mold, and can cool the extrusion mold from the back of the mold to improve the molding quality of the plastic sheet.

[0013] Preferably, the cooling section includes a storage cavity formed on the surface of the sliding plate facing the extrusion die. When the extrusion die is fixedly installed on the surface of the sliding plate, the opening of the storage cavity is sealed. The upper and lower edges of the extrusion die are respectively provided with circulation ports, which communicate with the interior of the storage cavity and can be connected to external circulation pipelines. After connecting the pipelines via a circulation pump, the coolant inside the storage cavity is driven to circulate along the circulation ports and pipelines to achieve cooling. The storage cavity also contains folded and bent cooling pipes made of copper, which are distributed in a serpentine folding and bending pattern inside the storage cavity, with both ends extending vertically from the top of the sliding plate. One end of the cooling pipe is connected to a high-pressure air pump, which continuously blows compressed air into the cooling pipe, using the airflow to assist in cooling the coolant inside the storage cavity and improve cooling efficiency.

[0014] Preferably, a top cover processing method, using any one of the top cover processing molds described above, includes the following steps: S1. Check the tightness of the connections of core components such as the fixed plate, support frame, track rod, and limit plate to ensure that the sliding plate slides smoothly along the track rod and that the fitting accuracy of the extrusion die and the pressure die meets the standard; inject lubricating oil into the lubrication port of the slide tube to ensure that the telescopic part moves flexibly; after debugging the hydraulic telescopic rod, demolding part and cooling part to ensure normal function, close the shielding door to ensure processing safety. S2. Select plastic raw materials that meet the material requirements of the washing machine top cover, dry and remove impurities to remove moisture and impurities from the raw materials, and avoid defects such as bubbles and cracks in the product after molding. Then, quantitatively put the pre-treated raw materials into the cavity of the pressure mold. S3. Start the hydraulic telescopic rod to drive the sliding plate to move along the track rod towards the limit plate, so that the extrusion mold is precisely pressed onto the pressure mold. Through the preset pressure and holding time, the plastic raw material is pressed into the top cover shape that matches the cavity. During this process, the air pumping unit completes air compression with the extrusion action. S4. By connecting the external pipelines and circulation pumps at the upper and lower ends of the extrusion mold to the circulation port, the coolant in the storage chamber is circulated. At the same time, the high-pressure air pump is started to continuously blow compressed air into the folded and bent copper cooling pipe to cool the coolant, thereby quickly cooling the extrusion mold, accelerating the curing and molding of the plastic top cover, and preventing product deformation. S5. After the pressure holding and cooling are completed, the hydraulic telescopic rod drives the sliding plate to move the extrusion mold away from the pressure mold. At this time, the first and second magnetic blocks magnetically attract and pull the sliding block, making the hose open. Compressed air enters the telescopic part to push the piston and push rod, and then drives the push rod through the assembly plate to compress the return spring, pushing out the forming top cover in the pressure mold, and continuing to separate the extrusion mold from the pressure mold until the first and second magnetic blocks disengage. The push rod retracts under the action of the return spring. S6. Open the shielding door, take out the formed washing machine top cover, and check whether the product appearance and size meet the requirements; clean the residual impurities in the cavity of the pressure mold and extrusion mold, close the shielding door, restore the mold to its initial state, and prepare for the next processing cycle.

[0015] Compared with the prior art, the advantages and positive effects of the present invention are as follows: 1. In this invention, the automatic sealing and conduction of the hose is achieved by means of the magnetic attraction between the first and second magnetic blocks in the locking part and the elastic action of the tension spring. The demolding drive can be completed without additional power source and control components, making the ejection action of the ejector rod smooth and synchronous.

[0016] 2. In this invention, a dual cooling structure of coolant circulation and cooling pipe ventilation is adopted. The copper pipe cooling pipe is folded and bent to increase the heat exchange area. The compressed air introduced by the high-pressure air pump can quickly reduce the temperature of the coolant, thereby achieving efficient cooling of the extrusion die. Attached Figure Description

[0017] Figure 1 This invention provides a three-dimensional structural diagram of a top cover processing mold and processing technology; Figure 2 This is another structural schematic diagram of a top cover processing mold and processing technology proposed in this invention; Figure 3 This invention provides a schematic diagram of a top cover processing mold and a partial extrusion mold used in the processing technology; Figure 4 This invention proposes a top cover processing mold and processing technology. Figure 3 Partial disassembly diagram; Figure 5 This invention proposes a top cover processing mold and processing technology. Figure 1 Enlarged view of point A; Figure 6 This invention provides a vertical cross-sectional view of the locking part in the top cover processing mold and processing technology; Figure 7 This invention provides a top cover processing mold and a vertical cross-sectional view of the telescopic part in the processing technology.

[0018] Legend: 1. Fixed plate; 2. Support frame; 3. Track rod; 4. Limiting plate; 5. Sliding plate; 6. Pressure mold; 7. Extrusion mold; 8. Demolding part; 81. Air inflator; 82. Extrusion rod; 83. Locking part; 831. Mounting block; 832. Horizontal hole; 833. Sliding cavity; 834. Tension spring; 835. Sliding block; 836. Magnetic block No. 1; 837. Hose; 838. Magnetic block No. 2; 84. Fixed frame; 85. Telescopic part; 851. Sliding tube; 852. Piston; 853. Push rod; 854. Lubrication port; 86. Assembly plate; 87. Return spring; 88. Push rod; 9. Cooling part; 91. Storage cavity; 92. Circulation port; 93. Cooling pipe; 10. Covering door. Detailed Implementation

[0019] like Figure 1-7 As shown, this invention provides a top cover processing mold and processing technology, mainly applied to the plastic molding processing of washing machine top covers. The mold includes a fixed plate 1 and a limiting plate 4, which are arranged opposite to each other and are fixedly connected by multiple support frames 2 to form a stable square frame structure. The support frames 2 are evenly distributed at the edges of the fixed plate 1 and the limiting plate 4 to ensure the load-bearing strength of the overall structure. A track rod 3 is installed inside the square frame. The two ends of the track rod 3 are fixed to the inner surfaces of the fixed plate 1 and the limiting plate 4, respectively. The track rod 3 is made of wear-resistant material and has a smooth surface treatment. A sliding plate 5 is slidably sleeved on the track rod 3 and can move smoothly along the track rod 3. An extrusion mold 7 is installed on the side of the sliding plate 5 facing the limiting plate 4. The extrusion mold 7 is detachably connected to the sliding plate 5 by bolts for subsequent maintenance and replacement. A pressure mold 6 is fixedly installed on the side of the limiting plate 4 facing the sliding plate 5, corresponding to the position of the extrusion mold 7. The cavity of the pressure mold 6 matches the shape of the washing machine top cover. A hydraulic telescopic rod is installed between the sliding plate 5 and the fixed plate 1. The fixed end of the hydraulic telescopic rod is fixed to the fixed plate 1, and the telescopic end is connected to the center area of ​​the sliding plate 5. The hydraulic telescopic rod can provide a stable driving force to drive the sliding plate 5 to reciprocate along the track rod 3. The surface of the limiting plate 4 is provided with a demolding part 8, which is arranged in accordance with the cavity of the pressure mold 6 to realize the demolding operation after molding.

[0020] The demolding section 8 includes an air-inflating section 81, which is embedded inside the limiting plate 4. When the pressure mold 6 and the extrusion mold 7 are engaged, the air-inflating section 81 compresses air synchronously. The air-inflating section 81 is connected to the telescopic section 85 via a locking section 83. The telescopic section 85 is fixed to the side of the limiting plate 4 by a fixing bracket 84. The fixing bracket 84 is welded to the limiting plate 4 to ensure the installation stability of the telescopic section 85. The limiting plate 4 has a through hole extending through its thickness direction. The ejector rod 88 slides through the through hole. One end of the ejector rod 88 extends to the bottom of the cavity of the pressure mold 6, and the other end is fixedly connected to the assembly plate 86. Multiple ejector rods 88 are evenly distributed on the assembly plate 86 to ensure uniform force during ejection. A return spring 87 is sleeved on the surface of the ejector rod 88. One end of the return spring 87 abuts against the outer surface of the limiting plate 4, and the other end abuts against the inner surface of the assembly plate 86. The return spring 87 is always in a pre-tight state. The output end of the telescopic part 85 is fixed to the outer surface of the assembly plate 86. When the pressure mold 6 moves with the sliding plate 5 and separates from the extrusion mold 7, the locking part 83 will automatically open, allowing the compressed air in the air pumping part 81 to enter the telescopic part 85 and drive the telescopic part 85 to extend. When the telescopic part 85 extends, it squeezes the assembly plate 86 and drives the ejector rod 88 to move into the cavity. At the same time, it compresses the return spring 87 and finally pushes out the plastic sheet inside the cavity through the ejector rod 88.

[0021] The air-pressing unit 81 includes a cylinder, which is embedded in a mounting groove inside the limiting plate 4. The telescopic end of the cylinder extends towards the extrusion mold 7 and is fixedly connected to the extrusion rod 82. The end face of the extrusion rod 82 corresponds to the side face of the extrusion mold 7. A first spring is installed inside the cylinder. One end of the first spring is fixed to the bottom of the cylinder, and the other end is connected to the telescopic end of the cylinder. When the extrusion mold 7 is disengaged from the pressure mold 6, the first spring can drive the cylinder and the extrusion rod 82 to return to their initial positions.

[0022] The locking part 83 includes a mounting block 831, which is fixed to the side of the limiting plate 4 by screws. The mounting block 831 has a sliding cavity 833 and a horizontal hole 832 on its side. The sliding cavity 833 is vertically oriented, and the horizontal hole 832 is horizontally oriented and intersects the sliding cavity 833 perpendicularly. A sliding block 835 is slidably installed inside the sliding cavity 833. The horizontal hole 832 passes through the mounting block 831 and the sliding block 835. A hose 837 passes through the horizontal hole 832, connecting the air inflator 81 and the telescopic part 85. The hose 837 is made of a high-pressure resistant elastic material. A tension spring 834 is connected between the sliding block 835 and the bottom of the sliding cavity 833. The tension spring 834 is always in a stretched state, and in its natural state, it can pull the sliding block 835 to press the hose 837, thus sealing the hose 837. A second magnetic block 838 is fixedly installed on the side of the sliding plate 5, and a first magnetic block 836 is fixed on the top of the sliding block 835. The first magnetic block 836 and the second magnetic block 838 have opposite magnetic properties. When the extrusion mold 7 and the pressure mold 6 are engaged, the first magnetic block 836 and the second magnetic block 838 magnetically attract each other to maintain the position of the sliding block 835. At this time, the tension spring 834 is still in the stretched state. When the extrusion die 7 begins to disengage from the pressure die 6, the first magnetic block 836, under the magnetic attraction of the second magnetic block 838, drives the sliding block 835 to slide against the elastic force of the tension spring 834, thereby relieving the pressure on the hose 837 and making the hose 837 conductive. As the extrusion die 7 continues to move away from the pressure die 6, the extrusion rod 82 returns to its original position under the elastic force of the first spring, and the push rod 88 will also gradually retract under the action of the return spring 87 until the first magnetic block 836 and the second magnetic block 838 disengage. The sliding block 835 returns to its original position under the action of the tension spring 834 and re-seals the hose 837.

[0023] The telescopic part 85 includes a slide tube 851, which is fixedly connected to the fixing frame 84 and arranged horizontally. A piston 852 is slidably installed inside the slide tube 851. The piston 852 is tightly fitted with the inner wall of the slide tube 851 to ensure sealing performance. A push rod 853 is fixedly connected to one side surface of the piston 852. The end of the push rod 853 away from the piston 852 passes through the opening of the slide tube 851 and is fixed to the assembly plate 86. Under the action of compressed air, the piston 852 can drive the push rod 853 to move axially along the slide tube 851. A lubrication port 854 is opened on the surface of the slide tube 851. A sealing plug is installed at the lubrication port 854. By opening the sealing plug, lubricating oil can be injected into the slide tube 851 through the lubrication port 854. The lubricating oil can reduce the frictional loss between the piston 852 and the inner wall of the slide tube 851 and extend the service life of the telescopic part 85.

[0024] The outer surface of the support frame 2 is provided with a track groove that extends along the height of the support frame 2. The shielding door 10 is slidably installed in the track groove, and the size of the shielding door 10 is sufficient to cover the outer areas of the extrusion mold 7 and the pressure mold 6. When the mold is being closed, the shielding door 10 is slid down along the track groove to block the exposed parts of the extrusion mold 7 and the pressure mold 6, preventing workers from accidentally touching and getting injured during processing. After processing, the shielding door 10 is slid up to allow for part removal.

[0025] The sliding plate 5 has a storage cavity 91 located behind the installation area of ​​the extrusion die 7. When the extrusion die 7 is installed on the sliding plate 5, the back of the extrusion die 7 fits tightly against the opening edge of the storage cavity 91, thus sealing the storage cavity 91. The upper and lower ends of the extrusion die 7 are respectively provided with circulation ports 92, which are connected to the inside of the storage cavity 91. Circulation ports 92 can be connected to external circulation pipelines, and after connecting the pipelines through a circulation pump, the coolant inside the storage cavity 91 can be circulated. The storage cavity 91 is equipped with folded and bent cooling pipes 93. The cooling pipes 93 are made of copper tubing and have good thermal conductivity. The cooling pipes 93 are distributed in a serpentine pattern inside the storage cavity 91 to increase the contact area with the coolant. Both ends of the cooling pipes 93 extend from the top of the sliding plate 5, with one end connected to a high-pressure air pump. The high-pressure air pump can continuously blow compressed air into the cooling pipes 93, and the airflow carries away the heat of the coolant, thus cooling the coolant.

[0026] The processing technology uses the aforementioned top cover processing mold to process the washing machine top cover. The specific steps are as follows: First, the mold is assembled and debugged. The fixed plate 1, support frame 2, and limit plate 4 are fixedly assembled according to the preset positions, ensuring that all connecting parts are firm and reliable. Then, the track rod 3 is installed between the fixed plate 1 and the limit plate 4. After the sliding plate 5 is fitted onto the track rod 3, the smoothness of sliding is checked. Next, the extrusion mold 7, the pressure mold 6, the hydraulic telescopic rod, the demolding part 8, and the cooling part 9 are installed in sequence, ensuring that the installation position of each component is accurate. An appropriate amount of lubricating oil is injected into the lubrication port 854 of the slide tube 851. The hydraulic telescopic rod is started to test the movement accuracy of the sliding plate 5, ensuring that the extrusion mold 7 and the pressure mold 6 can fit precisely when the molds are closed. At the same time, the flexibility of the extension and retraction of the demolding part 8 is tested, and the sealing of the circulation pipe and cooling pipe 93 connection of the cooling part 9 is checked. After debugging, the shield door 10 is slid to the protective position. Then, the raw materials are pre-treated and placed. Plastic raw materials that meet the processing requirements of the washing machine top cover are selected. The raw materials are placed in a drying device to remove internal moisture, and then impurities are removed by a screening device to avoid defects such as bubbles and cracks in the molded product. After pre-treatment, the raw materials are quantitatively placed into the cavity of the pressure mold 6 according to the preset weight to ensure that the raw materials are evenly distributed in the cavity. Next, the mold closing and extrusion molding are carried out. The hydraulic telescopic rod is activated, and the hydraulic telescopic rod drives the sliding plate 5 to move along the track rod 3 towards the limiting plate 4, thereby driving the extrusion mold 7 and the pressure mold 6 to close. The hydraulic telescopic rod applies a preset pressure and maintains the set pressure holding time, so that the plastic raw materials are pressed into a top cover prototype that matches the shape of the cavity inside the cavity. During the mold closing process, the extrusion mold 7 will squeeze the extrusion rod 82 of the air pump 81, which will drive the telescopic end of the cylinder to move so that the air pump 81 can complete the air compression. Subsequently, the molding and cooling process is carried out. During the pressure holding stage, the cooling system is started simultaneously. The coolant inside the storage cavity 91 is driven by the circulation pump to circulate along the circulation port 92 and the external pipeline. At the same time, the high-pressure air pump is started to blow compressed air into the cooling pipe 93. When the compressed air flows in the cooling pipe 93, it carries away the heat of the coolant. The cooled coolant can quickly absorb the heat of the extrusion mold 7, accelerate the curing and molding of the plastic top cover, and avoid product deformation due to uneven cooling.After cooling, an automatic demolding operation is performed. The hydraulic telescopic rod drives the sliding plate 5 to move the extrusion mold 7 away from the limiting plate 4. The extrusion mold 7 and the pressure mold 6 begin to separate. At this time, the second magnetic block 838 on the sliding plate 5 drives the first magnetic block 836 of the locking part 83 to move. The sliding block 835 slides against the elastic force of the tension spring 834, making the hose 837 open. The compressed air in the air pumping part 81 enters the slide tube 851 and pushes the piston 852 to move. The piston 852 drives the push rod 853 to extend out of the extrusion assembly plate 86. The assembly plate 86 drives the push rod 88 to move into the cavity and push out the solidified top cover. As the extrusion mold 7 continues to move away, the first magnetic block 836 and the second magnetic block 838 disengage. The push rod 88 is reset under the elastic force of the return spring 87. The cylinder returns to its initial state under the action of the first spring. Finally, the part is removed and the mold is cleaned. The shielding door 10 is slid open along the track groove to remove the formed washing machine top cover. The appearance and dimensions of the top cover are inspected to ensure it meets the processing requirements before proceeding with subsequent processing. If there are any defective products, the cause is analyzed and the mold parameters are adjusted. The residual plastic impurities in the cavity of the pressure mold 6 and the extrusion mold 7 are cleaned to ensure that the cavity is clean and free of debris. Then the shielding door 10 is closed, and the mold is restored to its initial state to await the next processing cycle.

[0027] Working principle: During processing, the hydraulic telescopic rod drives the sliding plate 5 to move along the track rod 3 towards the limiting plate 4, causing the extrusion mold 7 and the pressure mold 6 to close. During the mold closing process, the extrusion mold 7 compresses the extrusion rod 82 of the air-pressing part 81, causing the cylinder to compress air. At the same time, the first magnetic block 836 and the second magnetic block 838 in the locking part 83 are magnetically attracted. The sliding block 835, under the action of the tension spring 834, presses the hose 837 to maintain a sealed state. After the mold closes, the hydraulic telescopic rod maintains pressure to form the plastic material in the cavity. During this process, the cooling part 9 is activated, the circulation pump drives the coolant in the storage cavity 91 to circulate, and the high-pressure air pump blows compressed air into the cooling pipe 93 to cool the coolant. In turn, the coolant quickly reduces the temperature of the extrusion mold 7, accelerating the curing of the plastic top cover. After curing, the hydraulic telescopic rod drives the sliding plate 5 to move the extrusion mold 7 in the opposite direction. The extrusion mold 7 begins to separate from the pressure mold 6. At this time, the second magnetic block 838 drives the first magnetic block 836 and the sliding block 835 to slide. The hose 837 is unblocked and connected. Compressed air in the air pumping section 81 enters the slide tube 851 of the telescopic section 85, pushing the piston 852 and the push rod 853 to extend. Through the assembly plate 86, the push rod 88 moves into the cavity, pushing out the molded top cover to achieve demolding. As the extrusion mold 7 continues to move away, the first magnetic block 836 and the second magnetic block 838 disengage. The push rod 88 is reset under the action of the return spring 87, and the cylinder returns to its initial state under the action of the first spring, completing one processing cycle. The entire process achieves efficient and precise molding of the washing machine top cover through the coordinated cooperation of various components.

[0028] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention in any other way. Any person skilled in the art may utilize the disclosed technical content to make changes or modifications to create equivalent embodiments applicable to other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention, without departing from the scope of the present invention, still fall within the protection scope of the present invention. In the description of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in the present invention can be understood through specific circumstances.

Claims

1. A top cover processing mold, characterized in that: The device includes a fixed plate (1) and a limiting plate (4). The fixed plate (1) and the limiting plate (4) are fixed together by a support frame (2) to form a square frame structure. A track rod (3) is provided inside the square frame. The two ends of the track rod (3) are fixed to the fixed plate (1) and the limiting plate (4) respectively. A sliding plate (5) is slidably connected to the surface of the track rod (3). An extrusion mold (7) is installed on the surface of the sliding plate (5). A pressure mold (6) is installed on the surface of the limiting plate (4). A hydraulic telescopic rod is provided between the sliding plate (5) and the fixed plate (1). The hydraulic telescopic rod can drive the sliding plate (5) to slide along the track rod (3) to drive the extrusion mold (7) to press on the pressure mold (6) and thus press the plastic into a sheet. A demolding part (8) is provided on the surface of the limiting plate (4). The demolding part (8) can push the plastic sheet pressed into the pressure mold (6) out of the pressure mold (6) to demold.

2. The top cover processing mold according to claim 1, characterized in that: The demolding part (8) includes an air-injection part (81), wherein the pressure mold (6) is inserted into the extrusion mold (7) and the air-injection part (81) compresses air. The air-injection part (81) is connected to a telescopic part (85) by means of a locking part (83). The telescopic part (85) is fixed to the side of the limiting plate (4) by means of a fixing bracket (84). A push rod (88) is slidably inserted on the limiting plate (4). One end of the push rod (88) is fixedly connected to an assembly plate (86). A return spring is sleeved on the surface of the push rod (88). (87) The two ends of the return spring (87) are fixed to the limiting plate (4) and the assembly plate (86) respectively. The output end of the telescopic part (85) is fixed to the assembly plate (86). When the pressure mold (6) slides out of the extrusion mold (7), the locking part (83) opens and compressed air enters the telescopic part (85) to drive the telescopic part (85) to extend and extrude the assembly plate (86). The assembly plate (86) drives the push rod (88) to compress the return spring (87) and pushes the plastic sheet out of the pressure mold (6) with the help of the push rod (88).

3. The top cover processing mold according to claim 2, characterized in that: The air pump (81) includes a cylinder, wherein the cylinder extension end and the extrusion rod (82) are fixed. A first spring is provided inside the cylinder, which can drive the cylinder to reset when the extrusion mold (7) is disengaged from the pressure mold (6).

4. The top cover processing mold according to claim 3, characterized in that: The locking part (83) includes a mounting block (831), on the side of which a sliding cavity (833) and a transverse hole (832) are provided. The sliding cavity (833) and the transverse hole (832) are vertically arranged. A sliding block (835) is slidably connected inside the sliding cavity (833). The transverse hole (832) passes through the sliding block (835) from the side of the mounting block (831). The part also includes a hose (837), which connects the air pump part (81) and the telescopic part (85). The sliding block (835) and the sliding cavity (833) are sealed by pressing the hose (837) with a tension spring (834).

5. The top cover processing mold according to claim 4, characterized in that: The telescopic part (85) includes a slide tube (851), which is fixed to a fixing frame (84). A piston (852) is slidably connected inside the slide tube (851), and a push rod (853) is fixedly connected to the surface of the piston (852). One end of the push rod (853) is fixed to the assembly plate (86).

6. The top cover processing mold according to claim 5, characterized in that: The slide tube (851) has a lubrication port (854) on its surface, through which lubricating oil can be injected into the slide tube (851) for lubrication.

7. The top cover processing mold according to claim 6, characterized in that: The support frame (2) has a track groove on its surface and also includes a shield door (10). The shield door (10) can slide along the track groove on the support frame (2) and can be used to block the extrusion mold (7) and the pressure mold (6) to prevent injury to the workers.

8. The top cover processing mold according to claim 7, characterized in that: The sliding plate (5) is provided with a cooling section (9) inside, which can cool the extrusion die (7).

9. The top cover processing mold according to claim 8, characterized in that: The cooling section (9) includes a storage cavity (91) formed on the surface of the sliding plate (5). The extrusion mold (7) seals the storage cavity (91). The upper and lower ends of the extrusion mold (7) are provided with circulation ports (92). The circulation ports (92) can be connected to external pipelines. By means of a circulation pump, the coolant inside the storage cavity (91) can start to flow and circulate to cool down. The storage cavity (91) is also provided with a folded and bent cooling pipe (93). The cooling pipe (93) is a copper pipe. Both ends of the cooling pipe (93) extend from the top of the sliding plate (5). One end of the cooling pipe (93) is connected to a high-pressure air pump. The high-pressure air pump continuously blows compressed air into the cooling pipe (93) to cool the coolant inside the storage cavity (91).

10. A top cover processing technology, characterized in that: The top cover processing mold according to any one of claims 1-9 includes the following steps: S1. Check the tightness of the connections of core components such as the fixing plate (1), support frame (2), track rod (3), and limit plate (4) to ensure that the sliding plate (5) slides smoothly along the track rod (3) and that the fitting accuracy of the extrusion mold (7) and the pressure mold (6) meets the standard. Inject lubricating oil into the lubrication port (854) of the slide tube (851) to ensure that the telescopic part (85) moves flexibly. After the hydraulic telescopic rod, demolding part (8) and cooling part (9) are adjusted to be normal, close the shielding door (10) to ensure processing safety. S2. Select plastic raw materials that meet the material requirements of the washing machine top cover, dry and remove impurities to remove moisture and impurities from the raw materials, and avoid defects such as bubbles and cracks in the product after molding. Then, quantitatively put the pre-treated raw materials into the cavity of the pressure mold (6). S3. Start the hydraulic telescopic rod and drive the sliding plate (5) to move along the track rod (3) towards the limiting plate (4) so ​​that the extrusion mold (7) is precisely pressed onto the pressure mold (6). Through the preset pressure and holding time, the plastic raw material is pressed into a top cover shape that matches the cavity. During this process, the air pump (81) completes air compression with the extrusion action. S4. By connecting the external pipeline and the circulation pump through the circulation port (92) at the upper and lower ends of the extrusion mold (7), the coolant in the storage cavity (91) is circulated; at the same time, the high-pressure air pump is started to continuously blow compressed air into the folded and bent copper cooling pipe (93) to cool the coolant, thereby quickly cooling the extrusion mold (7), accelerating the curing and molding of the plastic top cover, and avoiding product deformation. S5. After the pressure holding and cooling are completed, the hydraulic telescopic rod drives the sliding plate (5) to move the extrusion mold (7) away from the pressure mold (6). At this time, the first magnetic block (836) and the second magnetic block (838) magnetically pull the sliding block (835), so that the hose (837) is connected. Compressed air enters the telescopic part (85) to push the piston (852) and the push rod (853), and then drives the push rod (88) through the assembly plate (86) to compress the return spring (87), push out the forming top cover in the pressure mold (6), and continue to separate the extrusion mold (7) from the pressure mold (6) until the first magnetic block (836) and the second magnetic block (838) disengage. The push rod (88) retracts under the action of the return spring (87). S6. Open the shielding door (10), take out the formed washing machine top cover, check whether the product appearance and size meet the requirements; clean the residual impurities in the cavity of the pressure mold (6) and the extrusion mold (7), close the shielding door (10), restore the mold to the initial state, and prepare for the next processing cycle.

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