Washing machine side plate forming and film wrapping device and forming and film wrapping method thereof

Abstract

The invention discloses a washing machine side plate forming and film wrapping device and a forming and film wrapping method thereof. The washing machine side plate forming and film wrapping device comprises a forming mold, a film sleeving mechanism, a leveling mechanism, a heat sealing mechanism, a cutting and separating mechanism and a flanging mold. The forming die is used for punching and forming a middle main body structure of a product and stretching a film to be matched and attached to the shape of the main body structure of the product; the film sleeving mechanism is used for sleeving a cylindrical stretched film on the outer side of a product; the leveling mechanism is used for straightening the stretched film to be attached to the product; the heat sealing mechanism is used for heating to seal the stretched film at the edge of the attached product; the cutting and separating mechanism is used for cutting off the connection between a thin film of a packaged product and a thin film roll and cutting and removing thin film slitter edges outside a sealing opening; the flanging die is used for conducting flanging machining on the product in the film carrying state. According to the coating machine, coating is completed in the forming process, and the good coating quality is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of metal parts forming and packaging, in particular to a washing machine side panel forming and packaging device and a forming and packaging method thereof. Background Art

[0002] The washing machine side panel is an important part of the washing machine body. It is usually formed by stamping metal sheets. After stamping, it is usually necessary to protect the product by coating with film to prevent moisture, oxidation and corrosion. The current packaging process is usually set at the last step of the overall production process. The structure of the fully formed product is more complex, which increases the difficulty of coating. For example, the washing machine side panel contains a complex concave-convex structure and flanged straight walls or flanges at different angles on the edge after being fully formed, which makes it difficult for the film to completely and tightly adhere to the product, and it is easy to cause wrinkles and damage to the film, affecting the quality of the coating. Summary of the invention

[0003] Purpose of the invention: In order to overcome the deficiencies in the prior art, the present invention provides a washing machine side panel forming and coating device and a forming and coating method thereof, which completes the coating during the forming process to achieve better coating quality.

[0004] Technical solution: To achieve the above-mentioned purpose, a washing machine side panel forming and coating device and a forming and coating method thereof of the present invention include a forming mold, a film covering mechanism, a flattening mechanism, a heat sealing mechanism, a cutting and separating mechanism and a flanging mold;

[0005] The forming die is used to stamp and form the main structure in the middle of the product, and to stretch the film to fit the shape of the main structure of the product;

[0006] The film sleeve mechanism is used to sleeve the cylindrical stretch film onto the outside of the product;

[0007] The flattening mechanism is used to straighten the stretch film to fit the product;

[0008] The heat sealing mechanism is used to heat so that the stretch film is sealed at the edge of the laminated product;

[0009] The cutting and separating mechanism is used to cut off the connection between the film of the packaged product and the film roll, and to cut and remove the waste edge of the film other than the seal;

[0010] The flanging die is used for flanging the product in a film-bearing state.

[0011] Furthermore, the molding die comprises a molding lower die and a molding upper die, the molding lower die and the molding upper die are respectively connected to independent lifting drive devices, the flanging die is fitted to the sides of the molding lower die, and is set at a fixed height;

[0012] When stamping and forming the main structure in the middle of the product, the sheet material of the product is placed on the lower forming die, and the upper forming die is close to the lower punch of the lower forming die;

[0013] When the film is stretched, the lower forming mold moves upward to press the lower film on the lower side of the main structure in the middle of the product, and the upper forming mold moves downward to press the upper film on the upper side of the main structure in the middle of the product;

[0014] During flanging, the lower forming die and the upper forming die clamp the middle portion of the product with the film, and drive the clamping portion to move downward relative to the flanging die.

[0015] Furthermore, the film covering mechanism includes a clamping roller, a film mouth twisting module, a clamping assembly and a film covering assembly. The film mouth twisting module is located at any end of the product in the length direction and is relatively located above the flanging mold. The clamping roller is located on the side of the film mouth twisting module away from the product. The film mouth twisting module is used to adsorb and support the film tube belt port in a ring-shaped opening state. The clamping assembly clamps the end of the product away from the film mouth twisting module, and is used to clamp and fix the product height to be flush with the film mouth twisting module. The film covering assembly cooperates with the film mouth twisting module to clamp the film tube belt port, and the film covering assembly moves laterally to drive the film tube belt to be covered relative to the product.

[0016] Furthermore, the film mouth twisting module includes two twisting units, the two twisting units are relatively close to or far away from each other in the vertical direction, a plurality of negative pressure ports are arranged on the clamping surfaces of the two units, and the two twisting units slide relatively along the direction of the clamping surfaces of the two units.

[0017] Furthermore, the film sleeve assembly includes a sealing clamp and a heating fan, the sealing clamp is used to seal and clamp the port of the film tube, the sealing clamp is arranged flush with the film mouth twisting module, the sealing clamp moves laterally close to or away from the film mouth twisting module, the air outlet of the heating fan is connected to the ventilation duct, and the ventilation duct is connected to the internal space of the film tube through the sealing clamp.

[0018] Furthermore, the leveling mechanism includes two clamping roller groups, which respectively clamp the two ends of the sheet material in the length direction, and the two rollers of the clamping roller groups clamp relatively up and down, so that the upper and lower side films of the film tube belt are respectively attached to the upper and lower side surfaces of the sheet material, and the clamping roller groups are movably arranged along the length direction of the sheet material.

[0019] Furthermore, the cutting and separating mechanism comprises a pressure member, a cutting lower die, a cutting upper die and a cutting tool, and the pressure member presses the sheet material coated with the film on the forming lower die and the flanging die;

[0020] The lower cutting die and the upper cutting die are arranged correspondingly up and down to form a cutting die;

[0021] The cutting tool is arranged on a side of the cutting die close to the film mouth twisting and dividing module.

[0022] Further, the following steps are included:

[0023] A1, punching the sheet through the forming die to form the middle main structure of the product;

[0024] A2, lifting the sheet formed in step I to the same height as the sleeve mechanism by means of the forming lower die, clamping and fixing the sheet position by means of the clamping assembly, and then resetting the forming lower die;

[0025] A3, clamp the film tube end by a sealing fixture close to the mouth twisting module, and pull the film tube end horizontally to achieve the film tube relative to the sheet material clamped and fixed in step II. During the clamping process, the pinch roller assists in pinching and the heating fan continuously supplies heat to the inside of the film tube;

[0026] A4, firstly, the film and one end of the sheet material are clamped and fixed relatively to each other by the clamping roller group on the side far away from the heating fan and rolled flat, then the heating fan is driven in reverse to make the film tube belt and the sheet material adhere to each other to the greatest extent, and finally, the film and the other end of the sheet material are clamped and fixed relatively to each other by the clamping roller group on the other side and rolled flat, and at the same time, the clamping and fixing of the clamping assembly is removed;

[0027] A5, the lower forming die and the upper forming die are synchronously approached and clamped at the plane where the sheet is located, so as to stretch the film until it is completely in contact with the main structure in the middle of the product;

[0028] A6, the clamping roller groups on both sides move away from each other to the outside of the cutting mold, and then the cutting lower mold and the cutting upper mold are synchronously approached and clamped at the plane where the sheet is located, so as to seal the edge of the sheet through the heating belt, and at the same time, the cutting tool cuts off the film tube belt from the position between the cutting mold and the clamping roller group;

[0029] A7, the forming lower die and the trimming lower die are reset to be flush with the flanging die, and the forming upper die, the trimming upper die and the pressure piece are pressed synchronously. After being fully pressed in place, the trimming die moves downward relative to the flanging die to complete the trimming of the waste edge of the film outside the sealing contour;

[0030] A8, the forming die moves downward relative to the flanging die to complete the flanging forming with film.

[0031] Beneficial effects: The device for forming and coating the side panels of a washing machine and the method for forming and coating the side panels of the washing machine of the present invention can achieve coating of the product during the product forming process by first stamping, then coating, and finally flanging, thereby avoiding the difficulty of coating after the formation of complex structures, thereby obtaining better coating quality. The film can be preheated first, then adsorbed and bonded, and finally pressed and shaped to ensure the fit between the film and the product, thereby further improving the coating quality. The film can be flattened by the cooperation of the double roller group during the coating process, thereby avoiding the phenomenon of wrinkles and stacking after the film is attached, thereby further improving the coating quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the overall structure of the side panel forming and coating device of the washing machine of the present invention;

[0033] Figure 2 The figure is a schematic cross-sectional view of a sealing fixture structure according to an embodiment of the present invention. DETAILED DESCRIPTION

[0034] The present invention will be further described below in conjunction with the accompanying drawings.

[0035] As attached Figure 1-2 The washing machine side panel forming and coating device and the forming and coating method thereof include a forming die, a coating mechanism, a flattening mechanism, a heat sealing mechanism, a cutting and separating mechanism and a flanging die;

[0036] The molding die is used for stamping and molding the middle main structure of the product, and stretching the film to fit the shape of the main structure of the product; the molding die includes a molding lower die 1 and a molding upper die 2, and the molding lower die 1 and the molding upper die 2 are respectively connected to independent lifting drive devices, and the flanging die is in contact with the four sides of the molding lower die 1 and is set at a fixed height; that is, the molding lower die 1 and the molding upper die 2 are used as a modular structure. When the two are matched separately, the stamping molding of the product and the stretching molding of the film are completed through different matching forms. When matched with the flanging die, the molding lower die 1 and the flanging die are combined as the flanging lower die, and the molding upper die 2 is used as the flanging upper die.

[0037] When stamping the middle main structure of the product, the sheet 10 to be formed into the product is positioned and placed on the upper end surface of the forming lower die 1, and the forming upper die 2 is pressed down close to the forming lower die 1, and the two cooperate to form the middle main structure of the product. The main structure protects various types of convex ridges, ridges and other plate reinforcement structures. The sheet 10 is pre-cut to form an edge contour, and is positioned and installed relative to the forming lower die through existing positioning means to ensure the accuracy of the forming position of the middle main structure on the sheet 10.

[0038] When stretching the film, the lower molding die 1 moves upward to press the lower film against the lower side of the main structure in the middle of the product, and the upper molding die 2 moves downward to press the upper film against the upper side of the main structure in the middle of the product; this ensures that the film can fully fit the complex structural surface of the main structure in the middle of the product, thereby improving the quality of the film coating.

[0039] During flanging, the lower molding die 1 and the upper molding die 2 clamp the middle part of the product with the film, and drive the clamping part to move downward relative to the flanging die. The film in the middle area is protected from the flanging process by clamping, and a separation gap is avoided between the film in the middle area that is completely attached to the product during the flanging process, thereby ensuring the final film coating quality.

[0040] The film covering mechanism is used to cover the cylindrical stretch film on the outside of the product; the film covering mechanism includes a clamping roller 3, a film mouth twisting module 4, a clamping assembly 5 and a film covering assembly 6. The film mouth twisting module 4 is located at any end of the product in the length direction and is relatively located above the flanging mold. The clamping roller 3 is located on the side of the film mouth twisting module 4 away from the product. The film mouth twisting module 4 is used to adsorb and support the film tube belt 20 port in a circular opening state. The clamping assembly 5 clamps the end of the product away from the film mouth twisting module 4, and is used to clamp and fix the product height flush with the film mouth twisting module 4. The film covering assembly 6 cooperates with the film mouth twisting module 4 to clamp the film tube belt 20 port. The film covering assembly 6 moves horizontally to drive the film tube belt 20 to cover the product. Among them, the clamping assembly can clamp the sheet material 10 in the air to facilitate the covering of the film tube belt 20. After the end of the film tube 20 is pulled out from the film roll, it passes through the pinch roller 3, and the pinch roller 3 pinches the end of the film to the film mouth twisting module 4, and the film mouth twisting module 4 twists and supports the end of the film tube 20 to form a flat annular opening, which is convenient for fitting the sheet 10. After the sheet 10 is clamped and fixed in position and the end of the film tube 20 is opened to a preset state, the end of the film tube 20 is clamped by the film fitting assembly 6 and pulled from one end of the sheet 10 to the other end, thereby completing the fitting of the cylindrical film relative to the sheet 10.

[0041] The film mouth twisting module 4 includes two twisting units, the two twisting units are relatively close to or far away from each other in the vertical direction, and a plurality of negative pressure ports are arranged on the clamping surfaces of the two twisting units, and the two twisting units slide relatively along the direction of the clamping surfaces of the two twisting units. When the end of the film tube 20 is clamped between the two twisting units by the clamping roller, the end of the film tube is first clamped by the two twisting units, and then the negative pressure ports of the clamping surface are activated, so that the two twisting units respectively apply adsorption force to the two superimposed layers of film, and then the two sides of the film are twisted apart by slight relative sliding of the two twisting units, and finally the two twisting units are relatively far away, so that the end of the film tube is opened and adsorbed and supported into a ring structure.

[0042] The film sleeve assembly 6 includes a sealing fixture 61 and a heating fan 62. The sealing fixture 61 is used to seal and clamp the port of the film tube 20. The sealing fixture 61 is flush with the film mouth twisting module 4. The sealing fixture 61 moves horizontally close to or away from the film mouth twisting module 4. The air outlet of the heating fan 62 is connected to the ventilation duct 63. The ventilation duct 63 is connected to the internal space of the film tube 20 through the sealing fixture 61. The ventilation channel can adopt a folded telescopic hose, and the two ends of the hose are respectively connected to the sealing of the heating fan and the ventilation port of the sealing fixture. After the sealing fixture completely clamps the film tube port, the negative pressure adsorption of the twisting unit on the film is closed to reduce the resistance of pulling the film, and the separation of the superimposed film layers is achieved by internal blowing, so that during the sleeve process, the film tube always maintains a state of relative suspension with the sheet material 10, avoiding scratches or damage to the film caused by scratches between the sheet material 10 and the film during the sleeve process. The hot air delivered can preheat the film, soften the film, and be more conducive to the stretching and forming of the film, thereby improving the film's fit and flatness.

[0043] Preferably, the sealing fixture 61 comprises an inner ring 611 and an outer ring 612 , the inner ring 611 and the outer ring 612 are sleeved relative to each other in a vertical plane, and an annular airbag 613 is provided on the outer ring surface of the inner ring. When the two twisting units clamp the end of the film tube, a small section flows out at the port position for the sealing clamp to clamp. The spacing between the two twisting units after separation ensures that the annular cross-section of the film port is just located in the area between the inner and outer rings of the sealing clamp. When clamping, the sealing clamp approaches the film mouth twisting module 4, and its inner ring extends into the inner side of the film tube port, while the outer ring is sleeved on the outer side of the film tube port. After the outer ring contacts the upper and lower twisting units, the advancement of the sealing clamp is stopped, and the annular airbag on the outer side of the inner ring is inflated, thereby pressing the film port from the inside to the outside against the inner side of the outer ring, thereby clamping the film. The annular airbag can be made of a flexible material with high friction, such as a rubber airbag, to maintain the firmness and airtightness of the clamping, and at the same time will not produce too hard a clamping force on the film, thereby avoiding damage to the film.

[0044] The flattening mechanism is used to straighten the stretch film and fit it to the product; the flattening mechanism includes two clamping roller groups 7, the two clamping roller groups 7 clamp the two ends of the sheet material 10 in the length direction respectively, and the two roller bodies of the clamping roller group 7 clamp relatively up and down, so that the upper and lower side films of the film tube 20 fit respectively with the upper and lower side panels of the sheet material 10, and the clamping roller group 7 is arranged to move along the length direction of the sheet material 10. The roller surface of the clamping roller is made of highly elastic rubber material, which provides a certain compression range when the two rubber clamping rollers are clamped relatively, ensuring that the overlapping and fitting parts of the film and the sheet material 10 can be clamped, and the overlapping parts of the film can also be clamped. When the two clamping roller groups move relatively far away, they can specifically straighten and flatten the section of the film tube set on the outside of the sheet material 10 to avoid folding, wrinkling and accumulation after the film is coated, so as to ensure the quality of the coating.

[0045] The cutting and separation mechanism is used to cut off the connection between the film of the packaged product and the film roll, and to cut off the waste edge of the film other than the seal; the cutting and separation mechanism includes a pressure piece 80, a cutting lower die 81, a cutting upper die 82 and a cutting tool 83, the pressure piece 80 presses the sheet material 10 coated with the film on the molding lower die 1 and the flanging die; the cutting lower die 81 and the cutting upper die 82 are arranged in correspondence with each other up and down to form a cutting die; the cutting tool 83 is arranged on the side of the cutting die close to the film mouth twisting module 4. Among them, the pressure piece corresponds to the flanging die up and down, and the cutting upper die 82 is fitted on the outside of the pressure piece, and the lifting and lowering movement is controlled by a separate driving cylinder. The two can also be used in combination to directly cut the edge contour of the sheet material 10, further improving the integration of the equipment. The vertical outer lifting and lowering movement of the cutting tool in line with the cutting die can make the cut end of the film tube belt always flat.

[0046] The heat sealing mechanism is used to heat the stretched film so that it is sealed at the edge of the product; the heat sealing mechanism includes a heating belt 9, which is arranged on the cutting contour line of the cutting lower mold 81. It can achieve perfect sealing according to the contour of the sheet 10, completely cut off the waste edge during cutting, and has no effect on the film strip at the cutting end, so as to avoid the film tube end being heat-sealed and unable to be packaged for the next time.

[0047] The flanging die is used to perform flanging processing on the product in the film state; if the flanging edge line is a closed curve, the flanging die is a ring-shaped integrated structure, and if the flanging edge is a non-closed curve, the flanging die is a split structure corresponding to multiple flanging parts. The flanging die includes a plurality of rollers 84. When flanging, the area within the flanging edge line is clamped by the forming die, and the entire sheet 10 is driven to move downward relative to the flanging die, so that the bottom side of the flanging part is in contact with the roller surface of the plurality of rollers 84 and slides. As the forming die is pressed downward as a whole, the flanging part gradually bends upward to fit with the side wall of the forming upper die 1 to form a flanging structure. The contact of the rollers avoids damage to the film during the bending process.

[0048] The above-mentioned film forming method of the side panel film forming device of the washing machine specifically comprises the following steps:

[0049] A1, punching the sheet material 10 through a forming die to form the middle main structure of the product; preferably, the lower forming die is a concave die and the upper forming die is a convex die, and the specific die structure is designed according to the product structure.

[0050] A2. After the stamping is completed, the upper forming mold rises and resets, and the sheet 10 formed in step I is lifted to the same height as the sleeve mechanism by the lower forming mold 1. The sheet 10 is clamped and fixed by the clamping assembly 5 and then the lower forming mold 1 is reset; so that the sheet 10 is suspended in the state of single-end clamping.

[0051] A3, clamp the end of the film tube 20 close to the mouth twist module 4 through the sealing clamp 61, and pull the end of the film tube 20 horizontally to achieve the film tube 20 relative to the sheet material 10 clamped and fixed in step II. During the wrapping process, the clamping roller 3 assists in clamping and the heating fan 62 continuously supplies heat to the inside of the film tube 20; the clamping roller hinders the further transportation of hot air along the length direction of the film tube to a certain extent, so as to limit the heat to be maintained near the sheet material 10, thereby focusing on heating and softening the tubular film sleeved on the outside of the sheet material 10, and the clamping roller maintains the tension of the film of the sleeve by controlling the rotation speed, while ensuring that the film is not stretched and deformed during the wrapping process, while maintaining the film in a straight state.

[0052] A4, firstly, the film and one end of the sheet material 10 are clamped and fixed relatively and flattened by the clamping roller group 7 on the side away from the heating fan 62, and then the heating fan 62 is reversed to drive, so that the film tube 20 and the sheet material 10 are attached to the maximum extent, and finally, the film and the other end of the sheet material 10 are clamped and fixed relatively and flattened by the clamping roller group 7 on the other side, and the clamping and fixing of the clamping assembly 5 are removed at the same time; after the film is in place, the relative fitting position of one end of the film and the sheet material 10 is first fixed by single-end clamping. During the fitting process, the heating time is short, which belongs to preheating. After the fitting is completed, the single-end clamping of the clamping roller group is used to achieve single-end closure and fixation, so that the hot air is concentrated near the sheet material, and then the hot air is continued for a period of time, and the sheet material and the film are heated at the same time, so that the film reaches the stretching softening degree. Then, through reverse suction, the softened film is pressed as much as possible to fit the semi-finished sheet material 10 by the atmospheric pressure. For the through-hole part on the plate, the films on both sides will also be sucked together at the through-hole position to achieve a better coating effect. During the suction process, the clamping roller group on the other side slowly clamps at the position biased inward of the clamping position of the clamping assembly, and slowly moves horizontally toward the end during the clamping process to gradually reduce the size of the exhaust port of the film tube and keep the film in a straight state. After the clamping roller group is completely clamped, the clamping assembly 5 is removed from the end of the plate, and suction is continued and the horizontal rolling clamping of the pinch roller is coordinated, so that the film between the two sides of the clamping roller group is almost completely fitted with the product sheet 10. At this time, the sheet 10 is suspended and fixed by clamping the two ends of the two clamping roller groups.

[0053] A5, by synchronously approaching the lower forming die 1 and the upper forming die 2 and clamping them at the plane position where the sheet material 10 is located, the film is stretched to completely fit with the main structure in the middle of the product; based on the clamped fixed position of the sheet material 10, the upper forming die and the lower forming die are approached to further shape and stretch the film at the complex structure before the film is completely cooled to ensure complete fit. A cooling pipe can be embedded in the forming die to quickly cool and shape the film after lamination.

[0054] A6, the clamping roller groups 7 on both sides move relatively away to the outside of the cutting mold, and then the lower cutting mold 81 and the upper cutting mold 82 are synchronously approached and clamped at the plane position where the sheet 10 is located, so as to seal the edge of the sheet 10 through the heating belt 9, and the film tube 20 is cut off from the position between the cutting mold and the clamping roller group 7 by the cutting tool 83 at the same time; the film belt is sealed and cut while it remains straight, so as to avoid excessive impact on the material roll of the film tube, avoid the generation of a long port after cutting, and cut in a straight state, so as to make the cut port more neat. After cutting, after turning on the negative pressure adsorption of the film by the twisting unit, the clamping roller group is released to clamp the port after shearing to form a new ring port in the open state, which is convenient for the next film covering.

[0055] A7, the forming lower die 1 and the cutting lower die 81 are reset to be flush with the flanging die, and the forming upper die 2, the cutting upper die 82 and the pressure member 80 are pressed synchronously. After being fully pressed into place, the cutting die moves downward relative to the flanging die to complete the cutting of the waste edge of the film outside the sealing contour; the edge trimming is performed after being cut off from the material roll to ensure the edge trimming quality.

[0056] A8, the forming die moves downward relative to the flanging die to complete the flanging forming with film.

[0057] The above description is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the above principles of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A washing machine side panel forming and coating device, characterized in that: It includes a forming die, a film sleeve mechanism, a flattening mechanism, a heat sealing mechanism, a cutting and separating mechanism, and a flanging die; The forming die is used to stamp and form the main structure in the middle of the product, and to stretch the film to fit the shape of the main structure of the product; The film sleeve mechanism is used to sleeve the cylindrical stretch film onto the outside of the product; The flattening mechanism is used to straighten the stretch film to fit the product; The heat sealing mechanism is used to heat so that the stretch film is sealed at the edge of the laminated product; The cutting and separating mechanism is used to cut off the connection between the film of the packaged product and the film roll, and to cut and remove the waste edge of the film other than the seal; The flanging die is used for flanging the product in a film-bearing state.

2. A washing machine side panel forming and coating device according to claim 1, characterized in that: The molding die comprises a molding lower die (1) and a molding upper die (2), the molding lower die (1) and the molding upper die (2) are respectively connected to independent lifting drive devices, and the flanging die is fitted to the sides of the molding lower die (1) and is set at a fixed height; When stamping and forming the middle main structure of the product, the sheet material (10) of the product is placed on the lower forming die (1), and the upper forming die (2) is pressed downwardly and close to the lower forming die (1); When the film is stretched, the lower forming mold (1) moves upward to press the lower film against the lower side of the main structure in the middle of the product, and the upper forming mold (2) moves downward to press the upper film against the upper side of the main structure in the middle of the product; During flanging, the lower molding die (1) and the upper molding die (2) clamp the middle portion of the product with the film, and drive the clamping portion to move downward relative to the flanging die.

3. A washing machine side panel forming and coating device according to claim 2, characterized in that: The film covering mechanism comprises a clamping roller (3), a film mouth twisting module (4), a clamping assembly (5) and a film covering assembly (6). The film mouth twisting module (4) is located at any end of the product in the length direction and is relatively located above the flanging mold. The clamping roller (3) is located on the side of the film mouth twisting module (4) away from the product. The film mouth twisting module (4) is used to adsorb and support the end of the film tube (20) in a circular opening state. The clamping assembly (5) clamps the end of the product away from the film mouth twisting module (4) and is used to clamp and fix the product to be flush with the film mouth twisting module (4). The film covering assembly (6) cooperates with the film mouth twisting module (4) to clamp the end of the film tube (20). The film covering assembly (6) moves laterally to drive the film tube (20) to be covered relative to the product.

4. A washing machine side panel forming and coating device according to claim 3, characterized in that: The film mouth twisting module (4) comprises two twisting units, the two twisting units are relatively close to or far away from each other in the vertical direction, a plurality of negative pressure ports are arranged on the clamping surfaces of the two units, and the two twisting units slide relatively along the direction of the clamping surfaces of the two units.

5. A washing machine side panel forming and coating device according to claim 4, characterized in that: The film sleeve assembly (6) comprises a sealing clamp (61) and a heating fan (62); the sealing clamp (61) is used for sealing and clamping the port of the film tube (20); the sealing clamp (61) is arranged flush with the film mouth twisting module (4); the sealing clamp (61) moves laterally towards or away from the film mouth twisting module (4); the air outlet of the heating fan (62) is connected to a ventilation duct (63); and the ventilation duct (63) is connected to the internal space of the film tube (20) through the sealing clamp (61).

6. A washing machine side panel forming and coating device according to claim 5, characterized in that: The leveling mechanism comprises two clamping roller groups (7), the two clamping roller groups (7) respectively clamping two ends of the sheet material (10) in the length direction, and the clamping roller groups (7) are arranged to move along the length direction of the sheet material (10).

7. A washing machine side panel forming and coating device according to claim 6, characterized in that: The cutting and separation mechanism comprises a pressure piece (80), a cutting lower die (81), a cutting upper die (82) and a cutting tool (83); the pressure piece (80) presses the sheet material (10) coated with a film on the forming lower die (1) and the flanging die; the cutting lower die (81) and the cutting upper die (82) are arranged correspondingly up and down to form a cutting die; the cutting tool (83) is arranged on one side of the cutting die close to the film mouth twisting and separation module (4).

8. A method for forming and coating a side panel of a washing machine according to any one of claims 1 to 7, characterized in that: The following steps are involved: A1, punching the sheet material (10) through a forming die to form a middle main structure of the product; A2, lifting the sheet material (10) formed in step I to the same height as the film sleeve mechanism by means of the forming lower die (1), clamping and fixing the sheet material (10) in position by means of the clamping assembly (5), and then resetting the forming lower die (1); A3, clamping the end of the film tube (20) close to the mouth twisting module (4) by means of a sealing clamp (61), and pulling the end of the film tube (20) horizontally, so as to achieve the film tube (20) being fitted relative to the sheet material (10) clamped and fixed in step II, and during the fitting process, the clamping roller (3) assists in clamping and the heating fan (62) continuously supplies heat to the inside of the film tube (20); A4, firstly, clamp the film and one end of the sheet material (10) relatively fixed and rolled flat by the clamping roller group (7) on the side away from the heating fan (62), then drive the heating fan (62) in reverse direction so that the film tube belt (20) and the sheet material (10) are attached to the greatest extent, and finally, clamp the film and the other end of the sheet material (10) relatively fixed and rolled flat by the clamping roller group (7) on the other side, and at the same time, remove the clamping and fixing of the clamping assembly (5); A5, the lower molding die (1) and the upper molding die (2) are synchronously brought close to each other and clamped at the plane where the sheet material (10) is located, so as to stretch the film until it is completely in contact with the main structure in the middle of the product; A6, the clamping roller groups (7) on both sides are relatively moved away from each other to the outside of the cutting mold, and then the cutting lower mold (81) and the cutting upper mold (82) are synchronously approached and clamped at the plane position where the sheet material (10) is located, so as to seal the edge of the sheet material (10) through the heating belt (9), and at the same time, the cutting tool (83) cuts off the film tube belt (20) from the position between the cutting mold and the clamping roller group (7); A7, the molding lower mold (1) and the trimming lower mold (81) are reset to be flush with the flanging mold, and the molding upper mold (2), the trimming upper mold (82) and the pressure member (80) are pressed synchronously. After being fully pressed into place, the trimming mold moves downward relative to the flanging mold to complete the trimming of the waste edge of the film outside the sealing contour; A8, the forming die moves downward relative to the flanging die to complete the flanging forming with film.

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