A drum washing machine outer drum forming device

Abstract

The present invention belongs to the technical field of injection molding machines, and specifically is a drum washing machine outer drum molding device, comprising a workbench; a barrel is fixedly connected to the top surface of the workbench, and a heating component is installed on the outer surface of the barrel; a pair of screws are arranged inside the barrel; a pair of injection heads are fixedly connected to one end of the barrel away from a driving unit; a check valve is arranged at one end of the barrel close to the injection head; a lower hopper is installed on the top of the barrel, and the raw materials are driven to move by two screws, which can increase the transportation volume of the raw materials, and also expand the space between the injection head and the end of the screw, so that more raw materials can be injected at one time and the injection pressure can be guaranteed. At the same time, the two injection heads can also ensure the injection quality of multiple injection holes, so that the raw materials can enter the mold faster and more evenly, thereby improving the injection molding efficiency and quality of the washing machine outer drum.

Description

Technical Field

[0001] The invention belongs to the technical field of injection molding machines, in particular to an outer drum molding device for a drum washing machine. Background Art

[0002] The outer drum of a drum washing machine is a structure used to support components such as the motor, heater, thermostat, and shock absorber. It is mainly composed of a drum body, a front cover, a rear cover, and an outer drum fork frame. The material is generally plastic, so it is usually formed in one piece using injection molding. This can simplify the processing and assembly process, make the structure more compact, and reduce the number of parts.

[0003] In the prior art, a horizontal injection molding machine is generally used for the injection molding of the outer drum of a drum washing machine. The horizontal injection molding machine usually includes an injection system, a mold clamping system, a hydraulic system, and an electrical control system. It can automatically complete the steps of mold clamping, injection, pressure holding, cooling, and mold opening. The horizontal injection molding machine injects the molten plastic into the outer drum mold and then cools it to obtain an injection-molded outer drum.

[0004] Horizontal injection molding machines in the existing technology generally complete feeding and injection operations through a single screw in the barrel. However, the outer drum mold of the washing machine is relatively large and generally has multiple injection ports. At this time, if a single screw is still used for injection operation, it is easy to cause insufficient injection pressure, which in turn affects the injection efficiency of the raw materials and the final product quality.

[0005] To this end, the present invention provides an outer drum molding device for a drum washing machine. Summary of the Invention

[0006] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0007] The technical solution adopted by the present invention to solve its technical problems is: the outer drum molding equipment of a drum washing machine described in the present invention includes a workbench; a barrel is fixedly connected to the top surface of the workbench, and a heating component is installed on the outer surface of the barrel; a pair of screws are arranged inside the barrel; a driving unit is installed at one end of the barrel; the driving unit is used to drive the screw to rotate and move along the axial direction of the barrel; a pair of injection heads are fixedly connected to the end of the barrel away from the driving unit; a check valve is provided at the end of the barrel close to the injection head, and the check valve is sleeved on the ends of the two screws; a mold system is installed at the injection head on the top surface of the workbench; the mold system drives the mold to open and close through a hydraulic rod, and the mold in the mold system is connected to the injection head; a lower hopper is installed on the top of the barrel.

[0008] Preferably, the driving unit includes a rotating component and a pushing component; the pushing component includes an injection cylinder; the telescopic end of the injection cylinder is rotatably connected to a pair of connecting rods; the rotating component drives the two connecting rods to rotate through a servo motor; a slide is provided at the end of the connecting rod away from the injection cylinder, and the slide is slidably connected to the barrel; a sealing plate is installed at the end of the slide close to the connecting rod, and the sealing plate is fixedly connected to the end face of the slide; the two connecting rods are rotatably connected to the sealing plate and extend to the inside of the slide; the ends of the two connecting rods extending to the inside of the slide are respectively fixedly connected to the ends of the two screws; sliding seals and rotating seals are respectively installed between the barrel and the slide and between the sealing plate and the connecting rod; the lower hopper is fixedly connected to the sealing plate.

[0009] Preferably, the rotating assembly includes a drive box; the two connecting rods pass through the drive box; the internal rotation of the drive box is connected to a transmission rod, and the transmission rod is connected to the servo motor through a gear set; the surface of the transmission rod is fixedly connected to gear 1; the gear 1 is meshed with a pair of gear 2s; the two gears 2 are respectively mounted on the surfaces of two connecting rods; a limiting groove is provided on the inner wall surface of the gear 2; the surface of the connecting rod is fixedly connected to a limiting block at the corresponding position of the limiting groove; the limiting block is in the shape of a long strip and is slidably connected in the limiting groove.

[0010] Preferably, an extension cylinder is provided between the sealing plate and the slide cylinder; the extension cylinder includes a pair of half cylinders, and the two half cylinders are arranged up and down; the half cylinders are fixed by bolts, and the end face of the formed extension cylinder is adapted to the end face of the slide cylinder; a plurality of evenly arranged connecting holes are provided on the surface of the sealing plate; the connecting holes pass through the sealing plate and the two half cylinders, and extend to the inside of the slide cylinder; the internal thread of the connecting hole is connected with a fixing bolt.

[0011] Preferably, the top surface of the workbench is slidably connected to a pair of movable seats between the drive box; the top surfaces of the two movable seats are fixedly connected to a cover shell; the interior of the cover shell is adapted to the outer wall of the slide cylinder; the inner wall of the cover shell is inlaid with a heating wire; and the inner wall of the cover shell is installed with a heat spreader.

[0012] Preferably, the workbench is arranged in a hollow structure, and the driving seat passes through the top surface of the workbench; tooth plates are provided at the corresponding positions of the two movable seats inside the workbench, and the two tooth plates are respectively fixed to the bottom surfaces of the two movable seats; a gear three is engaged and connected between the two tooth plates; the gear three is rotatably connected to the inner wall of the workbench.

[0013] Preferably, a pair of fixing seats are fixedly connected to the sides of the two covers that are close to each other, and the fixing seats on the surfaces of the two covers are symmetrically arranged in pairs; two fixing bolts are threadedly connected between the pairs of fixing seats; a conductive sheet is fixedly connected to the surfaces of the sides of the two covers that are close to each other, and the heating wires in the covers on both sides are connected into a whole through the conductive sheet; the heating wire on one side is connected to an external power supply.

[0014] Preferably, a pair of support plates are provided on the top surface of the workbench at the bottom of the cover shell; an L-shaped tube is fixedly connected to the top surface inside the workbench; the horizontal ends of the two L-shaped tubes are respectively aligned with the directions of the two moving seats; the internal sliding connection of the vertical part of the L-shaped tube is connected to piston rod 1, and piston rod 1 passes through the top surface of the workbench and is fixed to the support plate; the internal sliding connection of the horizontal part of the L-shaped tube is connected to piston rod 2; the interior of the L-shaped tube is filled with hydraulic oil between piston rod 1 and piston rod 2; a connecting assembly is installed between the moving seat and piston rod 2; the connecting assembly is used to control the connection between the moving seat and piston rod 2.

[0015] Preferably, the top surfaces of the two movable seats are provided with limiting holes, and the limiting holes run through the entire movable seat; limiting rods are provided in the limiting holes; the bottom surface of the limiting rod is fixedly connected to a baffle; the top surface of the baffle is fixedly connected to an end of the telescopic rod away from the limiting rod, and the telescopic end of the telescopic rod is slidably connected to the top surface inside the workbench; the surface of the limiting rod is threaded with a nut.

[0016] Preferably, one end of the second piston rod away from the L-shaped tube is fixedly connected to a connecting plate; a spring is fixedly connected between the connecting plate and the outer wall of the L-shaped tube.

[0017] The beneficial effects of the present invention are as follows:

[0018] 1. The drum washing machine outer drum molding equipment described in the present invention uses two screws to drive the raw material movement, which can increase the raw material transportation capacity and also expand the space between the injection head and the screw end, so that more raw material can be injected at a time while ensuring the injection pressure. At the same time, the two injection heads can also ensure the injection quality of multiple injection holes, allowing the raw material to enter the mold faster and more evenly, thereby improving the injection efficiency and quality of the washing machine outer drum.

[0019] 2. The outer drum molding device for a drum washing machine described in the present invention locates the sliding seal and the rotating seal on the sliding drum and the connecting rod, respectively. Therefore, when completing the axial movement and rotational movement of the screw, the embodiment of the present invention does not require the connecting rod of a traditional injection molding machine to be able to perform both rotational sealing and sliding sealing, thereby reducing the sealing difficulty and improving the sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below with reference to the accompanying drawings.

[0021] Figure 1 It is a perspective view of the present invention;

[0022] Figure 2 It is a partial cross-sectional view of the barrel of the present invention;

[0023] Figure 3 It is a partial cross-sectional view of the drive box of the present invention;

[0024] Figure 4 It is a structural diagram of gear 2 in the present invention;

[0025] Figure 5 It is a structural schematic diagram of the half cylinder in the present invention;

[0026] Figure 6 This is a schematic diagram of the assembly of the half cylinder, the slide cylinder and the sealing plate in the present invention;

[0027] Figure 7 It is a partial cross-sectional view of the workbench in the present invention;

[0028] Figure 8 It is a structural schematic diagram of the mobile seat in the present invention;

[0029] Figure 9 is a partial cross-sectional view of the vapor chamber of the present invention;

[0030] In the figure: 1. workbench; 2. barrel; 3. screw; 4. injection head; 5. check valve; 6. lower hopper; 7. injection cylinder; 8. connecting rod; 9. slide; 10. sealing plate; 11. drive box; 12. transmission rod; 13. gear 1; 14. gear 2; 15. limiting groove; 16. limiting block; 17. half barrel; 18. connecting hole; 19. fixing bolt 1; 20. moving seat; 21. cover; 22. heating wire; 23. heat spreader; 24. tooth plate; 25. gear 3; 26. fixing seat; 27. fixing bolt 2; 28. conductive sheet; 29. ​​support plate; 30. L-shaped tube; 31. piston rod 1; 32. piston rod 2; 33. limiting hole; 34. limiting rod; 35. baffle; 351. telescopic rod; 36. nut; 37. connecting plate; 38. spring. DETAILED DESCRIPTION

[0031] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0032] like Figures 1 to 2As shown, an outer drum molding device for a drum washing machine according to an embodiment of the present invention comprises a workbench 1; a barrel 2 is fixedly connected to the top surface of the workbench 1, and a heating assembly is installed on the outer surface of the barrel 2; a pair of screws 3 are arranged inside the barrel 2; a driving unit is installed at one end of the barrel 2; the driving unit is used to drive the screw 3 to rotate and move axially along the barrel 2; a pair of injection heads 4 are fixedly connected to the end of the barrel 2 away from the driving unit; a check valve 5 is provided at the end of the barrel 2 close to the injection head 4, and the check valve 5 is sleeved on the ends of the two screws 3; a mold system is installed at the top surface of the workbench 1 at the injection head 4; the mold system drives the mold to open and close by a hydraulic rod, and the mold in the mold system is connected to the injection head 4; a lower hopper 6 is installed on the top of the barrel 2; during operation, in the process of injection molding the outer drum of the drum washing machine, in order to ensure the quality of injection molding, the embodiment of the present invention can be used. First, the user needs to introduce the raw material from the lower hopper 6 into the barrel 2, and then the driving unit drives the two screws 3 to rotate and drives the raw material toward the injection head 4 During the movement, the heating component outside the barrel 2 heats the barrel 2, and then heats the raw material in the barrel 2, so that the raw material is melted. Then the driving unit drives the screw 3 to move away from the injection head 4. At this time, the check valve 5 is in an open state, and the molten raw material is able to enter between the injection head 4 and the end of the screw 3. Then the driving unit pushes the screw 3 toward the injection head 4. At this time, the check valve 5 is in a closed state, and the raw material previously between the injection head 4 and the end of the screw 3 is pushed out from the injection head 4 and injected into the mold system. After the mold system is cooled and ejected, the final washing machine outer drum product can be obtained. The movement of the raw material by the two screws 3 can increase the transportation capacity of the raw material, and can also adjust the space between the injection head 4 and the end of the screw 3, so that it can be applied to the injection molding production of more washing machine outer drums of different sizes and models, and ensure the injection pressure. At the same time, the two injection heads 4 can also ensure the injection quality of multiple injection holes, so that the raw material can enter the mold faster and more evenly, thereby improving the injection molding efficiency and quality of the washing machine outer drum.

[0033] like Figure 1 、 Figure 2 and Figure 6As shown, the driving unit includes a rotating assembly and a pushing assembly; the pushing assembly includes an injection cylinder 7; the telescopic end of the injection cylinder 7 is rotatably connected to a pair of connecting rods 8; the rotating assembly drives the two connecting rods 8 to rotate through a servo motor; a slide 9 is provided at one end of the connecting rod 8 away from the injection cylinder 7, and the slide 9 is slidably connected to the barrel 2; a sealing plate 10 is installed at one end of the slide 9 close to the connecting rod 8, and the sealing plate 10 is fixedly connected to the end face of the slide 9; the two connecting rods 8 are rotatably connected to the sealing plate 10 and extend into the interior of the slide 9; the ends of the two connecting rods 8 extending into the interior of the slide 9 are respectively fixedly connected to the ends of the two screws 3; sliding seals and rotating seals are respectively installed between the barrel 2 and the slide 9 and between the sealing plate 10 and the connecting rod 8; the lower hopper 6 is fixedly connected to the sealing plate 10;

[0034] During operation, when the screw 3 needs to move away from the injection head 4, the injection cylinder 7 will drive the connecting rod 8 to move away from the injection head 4, and the connecting rod 8 will drive the screw 3, slide 9 and sealing plate 10 to move away from the injection head 4, thereby increasing the space in the injection area of ​​the injection head 4 and the end of the screw 3; and when the injection of the raw material needs to be completed, the injection cylinder 7 will drive the connecting rod 8 to move toward the injection head 4, thereby driving the screw 3, slide 9 and sealing plate 10 to move toward the injection head 4, and finally the end of the screw 3 cooperates with the check valve 5 to push the raw material in the injection area out of the injection head 4; since the slide 9 is slidingly connected to the barrel 2 and the connecting rod 8 is rotationally connected to the sealing plate 10, the sliding seal and the rotating seal are respectively located at the slide 9 and the connecting rod 8. Therefore, when completing the axial movement and rotational movement of the screw 3, the embodiment of the present invention does not need to be able to rotate and slide like the connecting rod 8 of the traditional injection molding machine, thereby reducing the sealing difficulty and improving the sealing effect.

[0035] like Figure 1 and Figure 3As shown, the rotating assembly includes a drive box 11; the two connecting rods 8 pass through the drive box 11; the internal rotation of the drive box 11 is connected to the transmission rod 12, and the transmission rod 12 is connected to the servo motor through a gear set; the surface of the transmission rod 12 is fixedly connected to a gear 13; the gear 13 is meshed and connected to a pair of gear 2 14; the two gears 2 14 are respectively sleeved on the surfaces of the two connecting rods 8; the inner wall surface of the gear 2 14 is provided with a limiting groove 15; the surface of the connecting rod 8 is fixedly connected to a limiting block 16 at the corresponding position of the limiting groove 15; the limiting block 16 is long and is slidably connected in the limiting groove 15; during operation, when the drive box 11 needs to drive the connecting rod 8 to rotate When the servo motor drives the transmission rod 12 to rotate through the gear set, the transmission rod 12 then drives the gear 2 14 on the two connecting rods 8 to rotate through the gear 1 13 on its surface, and then the rotation of the gear 2 14 drives the connecting rod 8 to rotate. Since the gear 2 14 is slidably connected to the connecting rod 8 through the limit groove 15 on its surface and the limit block 16 on the surface of the connecting rod 8, when the connecting rod 8 moves axially, the gear 2 14 will slide along the connecting rod 8, thereby ensuring that the connecting rod 8 can still drive the screw 3 to rotate in the process of the connecting rod 8 driving the screw 3 to move, thereby preventing the raw materials in the barrel 2 from accumulating together in the process of the connecting rod 8 driving the screw 3 to move axially.

[0036] like Figure 6 As shown, an extension cylinder is provided between the sealing plate 10 and the slide 9; the extension cylinder comprises a pair of half cylinders 17, and the two half cylinders 17 are arranged one above the other; the half cylinders 17 are fixed by bolts, and the end face of the formed extension cylinder is adapted to the end face of the slide 9; a plurality of evenly arranged connecting holes 18 are opened on the surface of the sealing plate 10; the connecting holes 18 pass through the sealing plate 10 and the two half cylinders 17 and extend into the interior of the slide 9; the internal thread of the connecting hole 18 is connected to a fixing bolt 19;

[0037] Since the slide 9 in the present invention moves with the connecting rod 8, when the connecting rod 8 drives the slide 9 to move away from the injection head 4, there is a risk that the slide 9 will fall out of the barrel 2 and cause the raw material to leak. The traditional solution is to lengthen the slide 9. However, if the length of the slide 9 is too long, it will greatly affect the heat transfer efficiency of the heating component on the barrel 2, and then affect the melting efficiency of the raw material.

[0038] In response to the above problem, in the present invention, when the user needs to injection mold a larger outer drum of a washing machine, the screw 3 needs to move a longer distance in the direction away from the injection head 4 to increase the injection area. To this end, the user needs to first remove the fixing bolt at the end of the closing plate 10 to separate the closing plate 10 from the slide 9, and then install the two half-cylinders 17 between the closing plate 10 and the slide 9, and then splice the two half-cylinders 17 into a whole through bolts. Then the user screws the fixing bolt 19 back into the connecting hole 18 on the surface of the closing plate 10, the half-cylinder 17 and the slide 9, and then fixes the closing plate 10, the half-cylinder 17 and the slide 9 together, and then the connecting rod 8 drives the closing plate 10 away from the injection head 4 When it moves in the direction of the screw 3, it can move the length of a slide 9 plus a half-barrel 17, thereby avoiding the risk of the slide 9 escaping from the barrel 2 and causing leakage of the raw material, and thereby increasing the space between the end of the screw 3 and the injection head 4, thereby increasing the injection volume of the raw material, and thus enabling the injection molding of a larger washing machine outer drum. By replacing the half-barrels 17 of different lengths, the capacity of the injection zone can be changed, thereby adapting to the injection molding of washing machine outer drums of different sizes, and improving the scope of application of the embodiment of the present invention; at the same time, by adapting and selecting the half-barrel 17 of the corresponding length, the total length of the slide 9 plus the half-barrel 17 can be controlled as much as possible, thereby reducing the adverse effects of the slide 9 plus the half-barrel 17 on the heat transfer efficiency of the heating component.

[0039] like Figure 5 、 Figure 8 and Figure 9 As shown, the top surface of the workbench 1 is slidably connected with a pair of movable seats 20 between the drive box 11; the top surfaces of the two movable seats 20 are fixedly connected with a cover shell 21; the interior of the cover shell 21 is adapted to the outer wall of the slide 9; the inner wall of the cover shell 21 is inlaid with a heating wire 22; the inner wall of the cover shell 21 is installed with a heat spreader 23; during operation, when the half cylinder 17 or the slide 9 moves to the outside of the barrel 2, the heat spreader 23 between the cover shells 21 will adhere to its surface and heat the raw materials inside it through the heating wire 22, so as to avoid the two from being no longer heated by the heating component after moving to the outside of the barrel 2, causing the raw materials on the back to agglomerate, thereby affecting the final product quality. At the same time, the user can also separate the two cover shells 21 through the movable seat 20, thereby facilitating the replacement of the half cylinder 17.

[0040] like Figure 5 and Figure 7As shown, the workbench 1 is arranged in a hollow structure, and the driving seat passes through the top surface of the workbench 1; tooth plates 24 are provided at the corresponding positions of the two moving seats 20 inside the workbench 1, and the two tooth plates 24 are respectively fixed to the bottom surfaces of the two moving seats 20; a gear three 25 is meshed and connected between the two tooth plates 24; the gear three 25 is rotatably connected to the inner wall of the workbench 1; during operation, when the user needs to move the two cover shells 21 away from each other, the user only needs to move the moving seat 20 on one side to drive the cover shell 21 away from the cover shell 21 on the other side, and during the movement During the movement of the movable seat 20, it will drive the gear three 25 to rotate through the tooth plate 24 at the bottom, and the rotating gear three 25 will drive the tooth plate 24 on the other side to move, thereby realizing the synchronous movement of the tooth plates 24 and gear three 25 on both sides toward or away from each other, thereby driving the movable seat 20 and cover shell 21 on the other side to move toward or away from each other synchronously, so that the user only needs to move the movable seat 20 and cover shell 21 on one side, and can also drive the movable seat 20 and cover shell 21 on the other side to move synchronously, thereby reducing the user's operating difficulty and improving the usability of the embodiment of the present invention.

[0041] like Figures 7 and 8 As shown, a pair of fixing seats 26 are fixedly connected to the side of the two covers 21 close to each other, and the fixing seats 26 on the surfaces of the two covers 21 are symmetrically arranged in pairs; a fixing bolt 27 is threadedly connected between the paired fixing seats 26; a conductive sheet 28 is fixedly connected to the surface of the side of the paired fixing seats 26 close to each other, and the heating wires 22 in the covers 21 on both sides are connected into a whole through the conductive sheet 28; the heating wire 22 on one side is connected to the external power supply; during operation, when the two covers 21 are buckled together, the user can fix the two covers 21 together through the fixing bolt 27, so that the heat spreader 23 on the inside of the cover 21 can be close to the surface of the slide 9 or the half cylinder 17, thereby improving the heat dissipation performance. The conductive sheet 28 on the surface of the fixing seat 26 can connect the heating wires 22 inside the two covers 21 into a complete loop. At this time, the heating wire 22 on one side is energized with the external power supply so that the two heating wires 22 can work normally. When the two covers 21 are separated, the conductive sheets 28 on the paired fixing seats 26 will also separate. At this time, the electric heating at the two covers 21 cannot form a complete loop, that is, both are in an open circuit state, thereby preventing the user from forgetting to turn off the connection between the heating wire 22 and the external power supply when replacing the half-cylinder 17, causing the heating wire 22 to continue working, thereby causing the heat spreader 23 to be in a high temperature state, which can easily burn the user who is replacing the half-cylinder 17.

[0042] like Figure 7As shown, a pair of supporting plates 29 are provided at the bottom of the cover shell 21 on the top surface of the workbench 1; two L-shaped tubes 30 are fixedly connected to the top surface inside the workbench 1; the horizontal ends of the two L-shaped tubes 30 are respectively aligned with the directions of the two moving seats 20; the interior of the vertical portion of the L-shaped tube 30 is slidably connected with a piston rod 1 31, and the piston rod 1 31 passes through the top surface of the workbench 1 and is fixedly connected to the supporting plates 29; the interior of the horizontal portion of the L-shaped tube 30 is slidably connected with a piston rod 2 32; the interior of the L-shaped tube 30 is filled with hydraulic oil between the piston rod 1 31 and the piston rod 2 32; a connecting assembly is installed between the moving seat 20 and the piston rod 2 32; the connecting assembly is used to control the connection between the moving seat 20 and the piston rod 2 32; working When the user needs to replace the half-cylinder 17, the user needs to first place the bottom half-cylinder 17 on the top surface of the support plate 29, and then the user pushes the moving seat 20 to make the moving seats 20 on both sides move toward each other. At this time, the moving seat 20 will drive the piston rod 2 32 to move toward the inside of the L-shaped tube 30 through the connecting assembly, and then squeeze the hydraulic oil inside the L-shaped tube 30, so that the piston rod 1 31 at the top is lifted up, and the lifted piston rod 1 31 will drive the support plate 29 to rise, thereby pushing the half-cylinder 17 on the support plate 29 to the end face of the slide 9. At this time, the user can first fix the slide 9, the half-cylinder 17 at the bottom and the sealing plate 10 together through the fixing bolt 19, so as to facilitate the user's installation operation of the half-cylinder 17.

[0043] like Figure 7As shown, the top surfaces of the two moving seats 20 are each provided with a limiting hole 33, and the limiting hole 33 runs through the entire moving seat 20; a limiting rod 34 is provided in the limiting hole 33; the bottom surface of the limiting rod 34 is fixedly connected to a baffle 35; the top surface of the baffle 35 is fixedly connected to the end away from the limiting rod 34, and the telescopic end of the telescopic rod 351 is slidably connected to the top surface inside the workbench 1; the surface of the limiting rod 34 is threadedly connected to a nut 36; during operation, when the user needs to move the seat 20 to squeeze the piston rod 2 32, the user only needs to screw the nut 36 on the surface of the limiting rod 34, so that the limiting rod 34 can be lowered to adjust the height of the baffle 35, and finally make the height of the baffle 35 consistent with the piston rod 2 32, and then the user moves the two moving seats 20 to make the two moving seats 20 When the user moves toward each other, the movable seat 20 can pass through the limiting hole 33, drive the limiting rod 34 and the baffle 35 to move, and then squeeze the piston rod 2 32. When the user no longer needs the baffle 35 to continue squeezing the piston rod 2 32, the user only needs to screw the nut 36 again, so that the limiting rod 34 drives the baffle 35 to rise, so that the height of the baffle 35 and the piston rod 2 32 are staggered. At this time, when the user moves the movable seat 20 again, the piston rod 2 32 will no longer be squeezed, and the telescopic rod 351 can be extended and retracted during the process of raising and lowering the baffle 35, and always has a limiting effect on the end of the baffle 35 away from the limiting rod 34, thereby preventing the baffle 35 from deflecting around the limiting rod 34 during the process of squeezing the piston rod 2 32, causing the baffle 35 to fail to squeeze the piston rod 2 32 normally.

[0044] like Figure 7 As shown, the end of the piston rod 2 32 away from the L-shaped tube 30 is fixedly connected to a connecting plate 37; a spring 38 is fixedly connected between the connecting plate 37 and the outer wall of the L-shaped tube 30; during operation, when the baffle 35 compresses the piston rod 2 32, the piston rod 2 32 will drive the connecting plate 37 to move toward the L-shaped tube 30, thereby compressing the spring 38 between the connecting plate 37 and the L-shaped tube 30, and when the baffle 35 no longer squeezes the connecting plate 37, the compressed spring 38 will immediately recover, thereby causing the piston rod 2 32 to move in the direction away from the L-shaped tube 30, thereby driving the piston rod 1 31 to descend, so that the piston rod 1 31 drives the support plate 29 to move quickly to the top surface of the workbench 1, so as to facilitate the user to close the two side covers 21 later.

[0045] During operation, in the process of injection molding the outer drum of the drum washing machine, in order to ensure the injection molding quality, the embodiment of the present invention can be used. First, the user needs to introduce the raw material into the barrel 2 from the lower hopper 6, and then the driving unit drives the two screws 3 to rotate and drive the raw material to move toward the injection head 4. During this period, the heating component outside the barrel 2 will heat the barrel 2, and then heat the raw material in the barrel 2, so that the raw material is melted. Then the driving unit drives the screw 3 to move in the direction away from the injection head 4. At this time, the check valve 5 is in an open state, and the molten raw material is able to enter between the injection head 4 and the end of the screw 3. Then the driving unit pushes the screw 3 to move toward the injection head 4. At this time, the check valve 5 is in a closed state, and the raw material between the injection head 4 and the end of the screw 3 is pushed out from the injection head 4 and injected into the mold system. Then, the mold system is cooled and ejected to obtain the final washing machine outer drum product. The two screws 3 drive the raw material to move, which can increase the transportation volume of the raw material. At the same time, the space between the injection head 4 and the end of the screw 3 can also be adjusted, so that it can be applied to the injection molding production of more washing machine outer drums of different sizes and models, and the injection pressure can be guaranteed. At the same time, the two injection heads 4 can also ensure the injection quality of multiple injection holes, so that the raw material can enter the mold faster and more evenly, thereby improving the injection molding efficiency and quality of the washing machine outer drum.

[0046] When the screw 3 needs to move away from the injection head 4, the injection cylinder 7 will drive the connecting rod 8 to move away from the injection head 4, and the connecting rod 8 will drive the screw 3, slide 9 and sealing plate 10 to move away from the injection head 4, thereby increasing the space in the injection area between the injection head 4 and the end of the screw 3; and when the injection of the raw material needs to be completed, the injection cylinder 7 will drive the connecting rod 8 to move toward the injection head 4, thereby driving the screw 3, slide 9 and sealing plate 10 to move toward the injection head 4, and finally the end of the screw 3 cooperates with the check valve 5 to push the raw material in the injection area out of the injection head 4; since the slide 9 is slidingly connected to the barrel 2 and the connecting rod 8 is rotationally connected to the sealing plate 10, the sliding seal and the rotating seal are respectively located at the slide 9 and the connecting rod 8. Therefore, when completing the axial movement and rotational movement of the screw 3, the embodiment of the present invention does not need to be able to rotate and slide like the connecting rod 8 of the traditional injection molding machine, thereby reducing the sealing difficulty and improving the sealing effect.

[0047] When the drive box 11 needs to drive the connecting rod 8 to rotate, the servo motor will first drive the transmission rod 12 to rotate through the gear set, and then the transmission rod 12 will drive the gear 2 14 on the two connecting rods 8 to rotate through the gear 1 13 on its surface, and then the rotation of the gear 2 14 will drive the connecting rod 8 to rotate. Since the gear 2 14 is slidably connected to the connecting rod 8 through the limit groove 15 on its surface and the limit block 16 on the surface of the connecting rod 8, when the connecting rod 8 moves axially, the gear 2 14 will slide along the connecting rod 8, thereby ensuring that the connecting rod 8 can still drive the screw 3 to rotate in the process of the connecting rod 8 driving the screw 3 to move, thereby avoiding the accumulation of raw materials in the barrel 2 in the process of the connecting rod 8 driving the screw 3 to move axially.

[0048] Since the slide 9 in the present invention moves with the connecting rod 8, when the connecting rod 8 drives the slide 9 to move away from the injection head 4, there is a risk that the slide 9 will fall out of the barrel 2 and cause the raw material to leak. The traditional solution is to lengthen the slide 9. However, if the length of the slide 9 is too long, it will greatly affect the heat transfer efficiency of the heating component on the barrel 2, and then affect the melting efficiency of the raw material.

[0049] In response to the above problems, when the user needs to injection mold a larger outer drum of a washing machine, the present invention requires the screw 3 to move a longer distance away from the injection head 4 to increase the injection area. To this end, the user needs to first remove the fixing bolt at the end of the closing plate 10 to separate the closing plate 10 from the slide 9, and then install the two half-cylinders 17 between the closing plate 10 and the slide 9, and then splice the two half-cylinders 17 into a whole through bolts. Subsequently, the user screws the fixing bolt 19 back into the connecting hole 18 on the surface of the closing plate 10, the half-cylinder 17 and the slide 9, and then fixes the closing plate 10, the half-cylinder 17 and the slide 9 together, and then the connecting rod 8 drives the closing plate 10 away from the injection head. 4, it can move the length of a slide 9 plus a half-barrel 17, thereby avoiding the risk of the slide 9 escaping from the barrel 2 and causing leakage of the raw material, and thereby increasing the space between the end of the screw 3 and the injection head 4, thereby increasing the injection volume of the raw material, and thus being able to achieve larger-sized washing machine outer drum injection molding, by replacing the half-barrel 17 of different lengths, the capacity of the injection zone can be changed, thereby adapting to the injection molding of washing machine outer drums of different sizes, and improving the scope of application of the embodiment of the present invention; at the same time, by adapting and selecting the half-barrel 17 of the corresponding length, the total length of the slide 9 plus the half-barrel 17 can be controlled as much as possible, thereby reducing the adverse effects of the slide 9 plus the half-barrel 17 on the heat transfer efficiency of the heating component.

[0050] When the half cylinder 17 or the slide cylinder 9 moves to the outside of the barrel 2, the heat spreader 23 between the cover shells 21 will adhere to their surfaces and heat the raw materials inside through the heating wire 22, thereby preventing the two from no longer being heated by the heating component after moving to the outside of the barrel 2, causing the raw materials on the back to agglomerate, thereby affecting the final product quality. At the same time, the user can also separate the two cover shells 21 through the movable seat to facilitate the replacement of the half cylinder 17.

[0051] When the user needs to move the two cover shells 21 away from each other, the user only needs to move the moving seat 20 on one side to drive the cover shell 21 away from the cover shell 21 on the other side. During the movement of the moving seat 20, it will drive the gear three 25 to rotate through the toothed plate 24 at the bottom, and the rotating gear three 25 will drive the toothed plate 24 on the other side to move, thereby realizing the synchronous movement of the toothed plates 24 and gear three 25 on both sides toward or away from each other, thereby driving the moving seat 20 and cover shell 21 on the other side to move toward or away from each other synchronously, thereby realizing that the user only needs to move the moving seat 20 and cover shell 21 on one side, and can also drive the moving seat 20 and cover shell 21 on the other side to move synchronously, thereby reducing the user's operating difficulty and improving the usability of the embodiment of the present invention.

[0052] When the two cover shells 21 are buckled together, the user can fix the two cover shells 21 together through the fixing bolt 27, so that the heat spreader 23 inside the cover shell 21 can be close to the surface of the slide cylinder 9 or the half cylinder 17, thereby improving the heating effect. At the same time, the conductive sheet 28 on the surface of the fixing seat 26 can connect the heating wires 22 inside the two cover shells 21 into a complete circuit. At this time, one side of the heating wire 22 is energized with the external power supply to enable both heating wires 22 to work normally. When the two cover shells 21 are separated, the conductive sheet 28 on the paired fixing seat 26 will also separate. At this time, the electric heating at the two cover shells 21 cannot form a complete circuit, that is, both are in an open circuit state, thereby preventing the user from forgetting to turn off the connection between the heating wire 22 and the external power supply when replacing the half cylinder 17, causing the heating wire 22 to continue working, thereby causing the heat spreader 23 to be in a high temperature state, which can easily burn the user who is replacing the half cylinder 17.

[0053] When the user needs to replace the half-cylinder 17, the user needs to first place the bottom half-cylinder 17 on the top surface of the support plate 29, and then the user pushes the moving seat 20 to make the moving seats 20 on both sides move toward each other. At this time, the moving seat 20 will drive the piston rod 2 32 to move toward the inside of the L-shaped tube 30 through the connecting assembly, and then squeeze the hydraulic oil inside the L-shaped tube 30, so that the piston rod 1 31 at the top is lifted up, and the lifted piston rod 1 31 will drive the support plate 29 to rise, thereby pushing the half-cylinder 17 on the support plate 29 to the end face of the slide 9. At this time, the user can first fix the slide 9, the half-cylinder 17 at the bottom and the sealing plate 10 together through the fixing bolt 19, so as to facilitate the user's installation operation of the half-cylinder 17.

[0054] When the user needs to move the seat 20 to squeeze the piston rod 2 32, the user only needs to screw the nut 36 on the surface of the limit rod 34 to lower the limit rod 34 to adjust the height of the baffle 35 and finally make the height of the baffle 35 consistent with the piston rod 2 32. Then, the user moves the two moving seats 20 so that the two moving seats 20 move toward each other. The moving seat 20 can pass through the limit hole 33 to drive the limit rod 34 and the baffle 35 to move, thereby squeezing the piston rod 2 32. When the user no longer needs the baffle 35 to continue squeezing the piston rod 2 32, the user only needs to The nut 36 needs to be screwed again so that the limit rod 34 drives the baffle 35 to rise, so that the height of the baffle 35 and the piston rod 2 32 are staggered. At this time, when the user moves the movable seat 20 again, the piston rod 2 32 will no longer be squeezed. The telescopic rod 351 can be extended and retracted during the process of the baffle 35 rising and falling, and always has a limiting effect on the end of the baffle 35 away from the limit rod 34, thereby preventing the baffle 35 from deflecting around the limit rod 34 during the process of squeezing the piston rod 2 32, which will cause the baffle 35 to fail to squeeze the piston rod 2 32 normally.

[0055] When the baffle 35 compresses the piston rod 2 32, the piston rod 2 32 will drive the connecting plate 37 to move toward the L-shaped tube 30, thereby compressing the spring 38 between the connecting plate 37 and the L-shaped tube 30. When the baffle 35 no longer squeezes the connecting plate 37, the compressed spring 38 will immediately recover, causing the piston rod 2 32 to move away from the L-shaped tube 30, thereby driving the piston rod 1 31 to descend, so that the piston rod 1 31 drives the support plate 29 to move quickly to the top surface of the workbench 1, so as to facilitate the user to close the two side covers 21 later.

[0056] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A drum washing machine outer drum molding device, characterized in that: The invention comprises a workbench (1); a barrel (2) is fixedly connected to the top surface of the workbench (1), and a heating component is installed on the outer surface of the barrel (2); a pair of screws (3) are arranged inside the barrel (2); a driving unit is installed at one end of the barrel (2); the driving unit is used to drive the screws (3) to rotate and move axially along the barrel (2); a pair of injection heads (4) are fixedly connected to the end of the barrel (2) away from the driving unit; a check valve (5) is arranged at the end of the barrel (2) close to the injection head (4), and the check valve (5) is sleeved on the ends of the two screws (3); a mold system is installed at the injection head (4) on the top surface of the workbench (1); the mold system drives the mold to open and close through a hydraulic rod, and the mold in the mold system is connected to the injection head (4); a lower hopper (6) is installed on the top of the barrel (2).

2. The outer drum molding device of a drum washing machine according to claim 1, characterized in that: The driving unit comprises a rotating component and a pushing component; the pushing component comprises an injection cylinder (7); the telescopic end of the injection cylinder (7) is rotatably connected to a pair of connecting rods (8); the rotating component drives the two connecting rods (8) to rotate through a servo motor; a slide cylinder (9) is provided at one end of the connecting rod (8) away from the injection cylinder (7), and the slide cylinder (9) is slidably connected to the barrel (2); a sealing plate (10) is installed at one end of the slide cylinder (9) close to the connecting rod (8), and the sealing plate (10) is fixedly connected to the end face of the slide cylinder (9); the two connecting rods (8) are rotatably connected to the sealing plate (10) and extend into the interior of the slide cylinder (9); the ends of the two connecting rods (8) extending into the interior of the slide cylinder (9) are respectively fixedly connected to the ends of the two screws (3); sliding seals and rotating seals are respectively installed between the barrel (2) and the slide cylinder (9) and between the sealing plate (10) and the connecting rod (8); the lower hopper (6) is fixedly connected to the sealing plate (10).

3. The outer drum molding device of a drum washing machine according to claim 2, characterized in that: The rotating assembly comprises a driving box (11); the two connecting rods (8) penetrate the driving box (11); the driving box (11) is rotatably connected to a transmission rod (12) inside, and the transmission rod (12) is connected to a servo motor through a gear set; a gear 1 (13) is fixedly connected to the surface of the transmission rod (12); the gear 1 (13) is meshingly connected to a pair of gear 2 (14); the two gear 2 (14) are respectively sleeved on the surfaces of two connecting rods (8); a limiting groove (15) is provided on the inner wall surface of the gear 2 (14); a limiting block (16) is fixedly connected to the surface of the connecting rod (8) at a position corresponding to the limiting groove (15); the limiting block (16) is in the shape of a long strip and is slidably connected in the limiting groove (15).

4. The outer drum molding device of a drum washing machine according to claim 3, characterized in that: An extension tube is provided between the sealing plate (10) and the slide tube (9); the extension tube comprises a pair of half tubes (17), and the two half tubes (17) are arranged up and down; the half tubes (17) are fixed by bolts, and the end surface of the formed extension tube is matched with the end surface of the slide tube (9); a plurality of evenly arranged connecting holes (18) are opened on the surface of the sealing plate (10); the connecting holes (18) penetrate the sealing plate (10) and the two half tubes (17), and extend to the inside of the slide tube (9); the internal thread of the connecting hole (18) is connected with a fixing bolt (19).

5. The outer drum molding device of a drum washing machine according to claim 1, characterized in that: A pair of movable seats (20) are slidably connected between the top surface of the workbench (1) and the drive box (11); the top surfaces of the two movable seats (20) are fixedly connected to a cover shell (21); the interior of the cover shell (21) is adapted to the outer wall of the slide cylinder (9); the inner wall of the cover shell (21) is inlaid with a heating wire (22); and a heat spreader (23) is installed on the inner wall of the cover shell (21).

6. The outer drum molding device of a drum washing machine according to claim 5, characterized in that: The workbench (1) is arranged in a hollow structure, and the driving seat passes through the top surface of the workbench (1); tooth plates (24) are arranged inside the workbench (1) at positions corresponding to the two moving seats (20), and the two tooth plates (24) are respectively fixedly connected to the bottom surfaces of the two moving seats (20); a gear three (25) is meshedly connected between the two tooth plates (24); and the gear three (25) is rotatably connected to the inner wall of the workbench (1).

7. The outer drum molding device of a drum washing machine according to claim 6, characterized in that: A pair of fixing seats (26) are fixedly connected to the sides of the two covers (21) close to each other, and the fixing seats (26) on the surfaces of the two covers (21) are symmetrically arranged in pairs; a fixing bolt (27) is threadedly connected between the pairs of fixing seats (26); a conductive sheet (28) is fixedly connected to the surfaces of the sides of the two fixing seats (26) close to each other, and the heating wires (22) in the covers (21) on both sides are connected into a whole through the conductive sheet (28); and the heating wire (22) on one side is connected to an external power source.

8. The outer drum molding device of a drum washing machine according to claim 5, characterized in that: A pair of supporting plates (29) are arranged on the top surface of the workbench (1) at the bottom of the cover shell (21); two L-shaped tubes (30) are fixedly connected to the top surface inside the workbench (1); the horizontal ends of the L-shaped tubes (30) are respectively aligned with the directions of the two moving seats (20); a piston rod 1 (31) is slidably connected inside the vertical portion of the L-shaped tube (30), and the piston rod 1 (31) passes through the top surface of the workbench (1) and is fixedly connected to the supporting plate (29); a piston rod 2 (32) is slidably connected inside the horizontal portion of the L-shaped tube (30); the interior of the L-shaped tube (30) between the piston rod 1 (31) and the piston rod 2 (32) is filled with hydraulic oil; a connecting assembly is installed between the moving seat (20) and the piston rod 2 (32); the connecting assembly is used to control the connection between the moving seat (20) and the piston rod 2 (32).

9. The outer drum molding device of a drum washing machine according to claim 8, characterized in that: The top surfaces of the two movable seats (20) are each provided with a limiting hole (33), and the limiting hole (33) runs through the entire movable seat (20); a limiting rod (34) is provided in each of the limiting holes (33); a baffle (35) is fixedly connected to the bottom surface of the limiting rod (34); a telescopic rod (351) is fixedly connected to one end of the top surface of the baffle (35) away from the limiting rod (34), and the telescopic end of the telescopic rod (351) is slidably connected to the top surface inside the workbench (1); and a nut (36) is threadedly connected to the surface of the limiting rod (34).

10. The outer drum molding device of a drum washing machine according to claim 9, characterized in that: One end of the second piston rod (32) away from the L-shaped tube (30) is fixedly connected to a connecting plate (37); a spring (38) is fixedly connected between the connecting plate (37) and the outer wall of the L-shaped tube (30).

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