A surface coating device for injection molded parts used in air conditioner production

Abstract

The present application provides a surface coating device for injection molded parts used in air conditioner production, which belongs to the field of air conditioner production technology, including a synchronous belt conveyor, multiple pallet frames, a lower support mold, injection molded parts, a lifting module and a coating module; the coating module includes a mounting frame, a first cylinder, an upper mold shell, a pressure plate one, a flexible pressure block one, a pressure plate two, a support plate, an L-shaped guide rail frame, a pressure plate three and a slit knife, and also includes a cutting unit for cutting the film. The surface coating device for injection molded parts used in air conditioner production of the present application can not only meet the basic needs of coating the surface of the air conditioner injection molded parts with a protective film, but also can be pressed by the central diffused air bag to ensure sufficient coating and lamination of large curved surface structures, and ensure the flatness of the lamination to avoid wrinkles, so as to more firmly coat the film on the air conditioner injection molded parts, so that the film can better protect the air conditioner injection molded parts.

Description

Technical Field

[0001] The present application relates to the technical field of air-conditioning production, and in particular to a surface coating device for injection-molded parts used in air-conditioning production. Background Art

[0002] The outer shell of the air conditioner is mostly an injection molded part. After the injection molded product is processed, a transparent plastic film is generally covered on the exposed surface of the product to prevent the product from being scratched during subsequent transportation and processing, which would affect the appearance quality.

[0003] Although the existing surface coating devices for injection molded parts used in air conditioner production can meet the basic needs of coating the surfaces of air conditioner injection molded parts, in the coating process, a film is usually placed on the injection molded part, and then the film is pressed onto the injection molded part through a flattening structure. However, this flattening structure only flattens the film placed on a larger plane of the workpiece, that is, it only has the function of flat pressing. In addition to having a larger plane structure, some air conditioner injection molded parts also have an arc-shaped connecting surface around them. Therefore, it is difficult for the flattening structure to effectively press the film flatly onto the above-mentioned arc-shaped connecting surface. This will cause the pressed film to not fully cover the workpiece, but to cause warping and wrinkling. This will cause the user to easily lift the film from the warped or wrinkled part due to careless operation during the subsequent transportation of the air conditioner injection molded part, thereby causing the film to no longer effectively protect the injection molded part.

[0004] For example, the patent document with the announcement number CN113400637B discloses a surface coating device for injection molded parts used in air conditioner production. In the technical solution of the patent document, a fixed mold carrying the injection molded parts is loaded onto a mold supporting seat of a rotating conveyor frame, and a rotating attaching roller rotates to evenly cover the film tightly against the outer surface of the injection molded parts. This roller coating method will make the user only able to coat the workpiece whose axial direction of the rotating attaching roller is a planar structure. For the workpiece whose axial direction of the rotating attaching roller is an arc surface structure, it is impossible to fully coat the workpiece. Therefore, it cannot fully meet the needs of film bonding for arc surface shaped air conditioner injection molded parts, such as the air conditioner inner unit outer shell. Summary of the invention

[0005] In view of this, in order to solve the technical problem that when coating the surface of air-conditioning injection molded parts, it is not possible to fully ensure the sufficient coating and bonding of large curved surface structures and ensure the flatness of the bonding, thereby making the film prone to wrinkles and further making the film prone to falling off and damage, the present application provides a surface coating device for injection molded parts for air-conditioning production.

[0006] In order to solve the above technical problems, the present application provides a surface coating device for injection molded parts used in air-conditioning production, comprising a synchronous belt conveyor, a plurality of pallet frames are vertically clamped on the synchronous belt conveyor, a lower support mold is clamped on the pallet frame, and the injection molded parts to be coated are clamped on the lower support mold, and also include a lifting module for lifting the lower support mold from the synchronous belt conveyor and a coating module for coating the film on the injection molded parts; the coating module includes a mounting frame arranged at the side end of the synchronous belt conveyor, a first cylinder located above the synchronous belt conveyor is vertically arranged on the mounting frame, an upper mold shell is arranged at the lower end of the output shaft of the first cylinder, and the bottom of the upper mold shell is provided with a member for pressing the film onto the upper arc surface and the front side of the injection molded parts through an elastic guide member. A pressure plate 1 is provided on the arc surface and the rear arc surface, and a flexible pressure block 1 is provided at the bottom of the pressure plate 1, which is adapted to the upper arc surface, the front arc surface and the rear arc surface of the injection molded part. The center position of the flexible pressure block 1 is the highest and gradually extends to the side end; the bottom of the upper mold shell is also provided with a pressure plate 2 for pressing the film on the right arc surface of the injection molded part through a vertical plate, and a support plate adapted to the pressure plate 2 is provided in the lower support mold through an elastic guide member 2; the bottom of the upper mold shell is also provided with an L-shaped guide frame located at both ends of the pressure plate 1, and a pressure plate 3 for pressing the film on the left plane of the injection molded part is rotatably provided between the two guide frames, and a slitting knife for slitting the film corresponding to the corners on both sides of the left plane of the injection molded part is also vertically provided at the bottom of the upper mold shell. A slide slot hole is provided on the guide rail frame, and sliding blocks adapted to the slide slot holes on the guide rail frame are provided at the four corners of the pressure plate 3.

[0007] By adopting the above technical scheme, with the cooperation of the synchronous belt conveyor, the pallet frame and the lower support mold, the injection molded parts to be coated can be transported to the bottom of the coating module, and then the film can be pressed evenly on the upper arc surface, front arc surface, rear arc surface, right arc surface and left plane surface of the injection molded parts with the cooperation of the first cylinder, the upper mold shell, the elastic guide part 1, the pressure plate 1, the flexible pressure block 1, the pressure plate 2, the support plate, the guide frame, the pressure plate 3, the slitting knife and the cutting unit.

[0008] As a further improvement, it also includes a pressing plate arranged on the front and rear sides of the bottom of the upper mold shell through an elastic guide member 3, and the front and rear side ends inside the lower support mold are respectively provided with pads matched with the corresponding pressing plates. The interior of the lower support mold is also provided with a cutter 1 which is located on the inner side of the corresponding pad and is used to cut the front and rear sides of the film. The interior of the lower support mold is also provided with a cutter 2 which is located on the inner side of the support plate and is used to cut the right side of the film. The bottom of the upper mold shell is also provided with a lower pressure plate located on the outer side of the guide rail frame, and the interior of the lower support mold is provided with a cutter 3 which is matched with the lower pressure plate and is used to cut the left side of the film.

[0009] By adopting the above technical scheme, after the film is pressed onto the upper arc surface, front arc surface, rear arc surface and right arc surface of the injection molded part, while the upper mold shell continues to move downward, the front and rear sides and the lower part of the film can be cut with the cooperation of the pressing plate, the pad, the cutter one and the cutter two. After the slitting process is completed and the film is pressed onto the left plane of the injection molded part, the upper part of the film can be cut with the cooperation of the cutter three.

[0010] As a further improvement, the slitting knife is parallel to a connecting line 1 between the upper arc surface and the left side plane of the injection molded part or parallel to a connecting line 2 between the upper arc surface and the rear side arc surface of the injection molded part.

[0011] By adopting the above technical solution, the film can be slit at the corners on both sides of the left side plane of the injection molded part along the direction of the connecting line 1 parallel to the upper arc surface and the left side plane of the injection molded part or the connecting line 2 parallel to the upper arc surface and the rear side arc surface of the injection molded part, and then the film can be pressed onto the left side plane of the injection molded part.

[0012] As a further improvement, the slitting knife is tilted and located between the angle formed by the connecting line 1 between the upper arc surface of the injection molded part and the left side plane and the connecting line 2 between the upper arc surface of the injection molded part and the rear arc surface.

[0013] By adopting the above technical solution, the film can be slit at the corners on both sides corresponding to the left side plane of the injection molded part along the inclined direction between the angle formed by the connecting line 1 between the upper arc surface of the injection molded part and the left side plane and the connecting line 2 between the upper arc surface of the injection molded part and the rear arc surface.

[0014] As a further improvement, the laminating module also includes an auxiliary pressure plate arranged at the bottom of the upper mold shell and used to press the edges and corners of the films connected to the front and rear side films, and the bottom of the auxiliary pressure plate is an arc-shaped structure adapted to the front and rear arc surfaces; the side ends of the synchronous belt conveyor are also provided with fixed frames corresponding to the two sides of the left side plane of the injection molded part, and second cylinders are respectively arranged laterally on the two fixed frames, and flexible pressure blocks 2 for pressing the edges and corners of the film connected to the left side film are respectively arranged on the output shafts of the two second cylinders, and the two flexible pressure blocks 2 are close to the side of the left side plane of the injection molded part and are arc-shaped structures adapted to the front and rear arc surfaces.

[0015] By adopting the above technical solution, the edges and corners of the film connected to the front and rear side films are pressed onto the front and rear curved surfaces of the injection molded part through the auxiliary pressure plate; through the cooperation of the fixing frame, the second cylinder and the flexible blades, the edges and corners of the film close to the left plane of the injection molded part can be pressed onto the corner between the left plane of the injection molded part and the front and rear curved surfaces.

[0016] As a further improvement, the lifting module includes a third cylinder vertically arranged on the ground, and the upper end of the output shaft of the third cylinder is provided with a lifting plate that can be clamped and fixed with the bottom of the lower supporting mold.

[0017] By adopting the above technical solution, with the cooperation of the third cylinder and the lifting plate, the pallet frame, the lower support mold and the injection molded parts can be lifted together from the synchronous belt conveyor, thereby avoiding pressure damage to the synchronous belt conveyor during the process of pressing the film onto the injection molded parts.

[0018] As a further improvement, a plurality of plug-in posts are provided on the two synchronous belts of the synchronous belt conveyor, and a plug-in hole matching the plurality of plug-in posts is provided on the pallet frame.

[0019] By adopting the above technical solution, with the cooperation of the plug-in column and the plug-in hole, the pallet frame and the synchronous belt of the synchronous belt conveyor can be plugged and fixed.

[0020] As a further improvement, a snap-in groove matched with the lower supporting mold is arranged on the top of the tray frame, and a snap-in protrusion matched with the injection molded part is arranged on the top of the lower supporting mold.

[0021] By adopting the above technical solution, with the cooperation of the clamping groove, the tray frame and the lower support mold can be clamped and fixed; with the cooperation of the clamping protrusion, the lower support mold and the injection molded part can be clamped and fixed.

[0022] In summary, compared with the prior art, the present application includes at least one of the following beneficial technical effects:

[0023] 1. The film is gradually attached to the upper curved surface, front curved surface and rear curved surface of the injection molded part from the center to the side through a flexible pressing block which is the highest in the center and gradually extends toward the side. This can effectively avoid bubbles and wrinkles in the process of attaching the film to the upper curved surface, front curved surface and rear curved surface, so that the film can be fully and evenly attached to the upper curved surface, front curved surface and rear curved surface of the injection molded part, and the firmness of the attachment is maintained.

[0024] 2. The corners of the air conditioner casing are more susceptible to bumps in actual production, so more protection is needed. In the prior art, a film is generally applied to the corners by stretching. However, this treatment method can easily cause the film to become thinner at the corresponding parts due to stretching, thereby making the film at the corresponding parts more susceptible to damage. However, the technical solution of the present application is to re-apply the cut film to the corners, which can not only meet the needs of quickly and completely applying film to the corners of the air conditioner casing, but also increase the thickness of the film at the corners, reducing the risk of bumps and damage during use.

[0025] 3. The film corresponding to the left plane corner can be cut by oblique cutting, so that the two film corners at the corner are respectively attached to the edge at the corner, so that the film on the edge at the corner is double-layered, thereby effectively improving the firmness of the film on the edge at the corner.

[0026] 4. The pallet frame, the lower support mold and the injection molded parts can be lifted from the synchronous belt conveyor together through the lifting module, thereby avoiding pressure damage to the synchronous belt conveyor during the process of pressing the film onto the injection molded parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the overall structure of this application;

[0028] Figure 2 This is a schematic diagram of the structure of the third cylinder and the lifting plate of the present application;

[0029] Figure 3 This is a schematic diagram of the structure of the lower support mold, support plate and cutter three of the present application;

[0030] Figure 4 This is a schematic diagram of the structure of the lower support mold, support plate and pad of the present application;

[0031] Figure 5 For this application Figure 4 A is a schematic diagram of the partially enlarged structure of the middle part;

[0032] Figure 6 This is a schematic diagram of the structure of the injection molded part of this application;

[0033] Figure 7 This is a schematic diagram of the structure of the upper mold shell, the flexible pressing block 1, the vertical plate and the pressing plate 2 of the present application;

[0034] Figure 8 For this application Figure 7 A schematic diagram of the partially enlarged structure of B in the middle;

[0035] Fig. 9 It is a front view cross-sectional structural schematic diagram of the upper mold shell, elastic guide member 1, pressure plate 1 and flexible pressure block 1 of the present application;

[0036] Fig.10 It is a schematic diagram of the side cross-sectional structure of the upper mold shell, the elastic guide member 1, the pressing plate 1 and the flexible pressing block 1 of the present application;

[0037] Fig.11 This is a schematic structural diagram of the fixing frame, the second cylinder and the flexible pressing block 2 of the present application.

[0038] Description of reference numerals: 1, synchronous belt conveyor; 2, pallet frame; 3, lower support mold; 4, injection molded part; 21, mounting frame; 22, first cylinder; 23, upper mold shell; 24, elastic guide member 1; 25, pressing plate 1; 26, flexible pressing block 1; 27, vertical plate; 28, pressing plate 2; 29, elastic guide member 2; 210, support plate; 211, guide rail frame; 212, pressing plate 3; 213, slit knife; 214, elastic guide Component three; 215, pressing plate; 216, pad; 217, cutter one; 218, cutter two; 219, lower pressing plate; 220, cutter three; 221, auxiliary pressing plate; 222, fixing frame; 223, second cylinder; 224, flexible pressing block two; 31, third cylinder; 32, lifting plate; 41, upper arc surface; 42, rear arc surface; 43, left plane; 44, right arc surface; 45, connecting line one; 46, connecting line two. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be clearly and completely described below in combination with the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the described embodiments of the present application, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of this application.

[0040] Reference Figure 1 The present embodiment provides a surface coating device for injection molded parts for air conditioner production, comprising a synchronous belt conveyor 1, a plurality of pallet frames 2, a plurality of lower support molds 3, a lifting module and a coating module; the pallet frame 2 is vertically clamped on the synchronous belt conveyor 1, the lower support mold 3 is clamped on the pallet frame 2, the injection molded part 4 is clamped on the lower support mold 3, the lifting module is used to lift the lower support mold 3 from the synchronous belt conveyor 1, and the coating module is used to coat a film on the injection molded part 4.

[0041] Reference Figure 1 , Figure 7 , Figure 8 , Fig. 9 and Fig.10 The laminating module includes a mounting frame 21, a first cylinder 22, an upper mold shell 23, an elastic guide member 24, a pressing plate 25, a flexible pressing block 26, a pressing plate 28, an elastic guide member 29, a supporting plate 210, two guide rail frames 211, a pressing plate 3 212, two slit knives 213 and a cutting unit; the flexible pressing block 26 is EVA foam or an air bag.

[0042] Reference Figure 7 , Figure 8 , Fig. 9 and Fig.10The mounting frame 21 is arranged at the side end of the synchronous belt conveyor 1, the first cylinder 22 is vertically arranged at the upper end of the mounting frame 21, and is located above the synchronous belt conveyor 1, the upper mold shell 23 is arranged at the lower end of the output shaft of the first cylinder 22, the pressing plate 25 is arranged at the bottom of the upper mold shell 23 through the elastic guide member 24, and is used to press the film onto the upper arc surface 41, the front arc surface and the rear arc surface 42 of the injection molded part 4, the flexible pressing block 26 is arranged at the bottom of the pressing plate 25, the center position of the flexible pressing block 26 is the highest, and gradually extends to the side end; the pressing plate 28 is arranged at the bottom of the upper mold shell 23 through the vertical plate 27, and is used to press the film onto the upper arc surface 41, the front arc surface and the rear arc surface 42 of the injection molded part 4. The film is pressed on the right side arc surface 44 of the injection molded part 4. The support plate 210 is arranged in the lower support mold 3 through the elastic guide member 29 and is matched with the pressing plate 28. Two guide rails 211 are arranged at the bottom of the upper mold shell 23 and are respectively located at the two ends of the outer side of the pressing plate 1 25. The pressing plate 3 212 is rotatably arranged between the two guide rails 211 to press the film on the left side plane 43 of the injection molded part 4. Two slitting knives 213 are vertically arranged at the bottom of the upper mold shell 23 and are respectively used to perform slitting processing on the two side corners of the film corresponding to the left side plane 43 of the injection molded part 4. The cutting unit is used to cut the film. The guide rail 211 is provided with a slide slot hole, and the four corners of the pressing plate 3 212 are provided with sliding blocks matched with the slide slot holes on the guide rail 211.

[0043] The elastic guide member 1 24 includes a telescopic rod 1 and a telescopic spring 1 sleeved on the outside of the telescopic rod 1, the two ends of the telescopic rod 1 are respectively connected to the upper mold shell 23 and the pressure plate 1 25, and the two ends of the telescopic spring 1 are respectively connected to the upper mold shell 23 and the pressure plate 1 25; the elastic guide member 2 29 includes a telescopic rod 2 and a telescopic spring 2 sleeved on the outside of the telescopic rod 2, the two ends of the telescopic rod 2 are respectively connected to the lower support mold 3 and the support plate 210, and the two ends of the telescopic spring 2 are respectively connected to the lower support mold 3 and the support plate 210. In other embodiments, the elastic guide member 1 24 can also be a spring or an air spring, and the elastic guide member 2 29 can also be a spring or an air spring, which will not be repeated here.

[0044] The user can snap-fit ​​the pallet frame 2 onto the synchronous belt conveyor 1, then snap-fit ​​the lower support mold 3 onto the pallet frame 2, snap-fit ​​the injection molded part 4 onto the lower support mold 3, and then start the synchronous belt conveyor 1 to convey multiple pallet frames 2, lower support molds 3 and injection molded parts 4, and with the cooperation of the film cloth retracting and releasing mechanism, the film is located above the multiple injection molded parts 4 and between the bottom of the flexible pressing block 26. When an injection molded part 4 is conveyed to the bottom of the flexible pressing block 26, the synchronous conveyor can be suspended to allow the injection molded part 4 to rest on the flexible pressing block 26. The lower support mold 3 and the injection molded part 4 can then be separated from the pallet frame 2 and lifted off the synchronous belt conveyor 1 by the lifting module. Then the upper mold shell 23, the pressure plate 25 and the flexible pressure block 26 can be moved downward by the first cylinder 22. The central part of the flexible pressure block 26 will first press the film onto the central part of the upper arc surface 41 of the injection molded part 4 (the windshield of the air conditioner inner unit shell), and then the film will gradually be attached to the upper arc surface 41 of the injection molded part 4 as well as the front and rear arc surfaces 42 from the center position to the side ends.

[0045] Then, the output shaft of the first cylinder 22 will continue to extend downward to a certain length, and the pressure plate 25 and the flexible pressure block 26 will maintain the pressing effect on the upper arc surface 41 and the front arc surface and the rear arc surface 42 with the cooperation of the elastic guide member 24. The pressure plate 28 will continue to move downward and, with the cooperation of the elastic guide member 29 and the support plate 210, press the film onto the right arc surface 44.

[0046] Then, the output shaft of the first cylinder 22 will continue to extend downward to a certain length, and the pressure plate 25 and the flexible pressure block 26 will maintain the pressing effect on the upper arc surface 41 and the front arc surface and the rear arc surface 42 with the cooperation of the elastic guide member 24. The pressure plate 28 and the support plate 210 will maintain the pressing effect on the right arc surface 44 with the cooperation of the elastic guide member 29. The slitting knife 213 will slit the film at the corners on both sides of the left plane 43 of the injection molded part 4, and the cutting unit will cut the film at the front and rear side ends and the right side end corresponding to the injection molded part 4 to produce a U-shaped cutting opening.

[0047] Then, the output shaft of the first cylinder 22 will continue to extend downward to a certain length, and the pressure plate 1 25 and the flexible pressure block 1 26 will maintain the pressing effect on the upper arc surface 41 and the front arc surface and the rear arc surface 42 under the cooperation of the elastic guide member 1 24, and the pressure plate 2 28 and the support plate 210 will maintain the pressing effect on the right arc surface 44 under the cooperation of the elastic guide member 2 29, and the two guide rails 211 and the pressure plate 3 212 will continue to move downward. The pressure plate 3 212 will be reversed and rotated along the guide rail 211 due to the reverse push of the film, thereby switching from a horizontal state to a vertical state, and moving downward with the guide rail 211, so as to press the film on the left plane 43 of the injection molded part 4. The cutting unit will then complete the cutting process of the film corresponding to the left end of the injection molded part 4. Afterwards, the first cylinder 22 can drive the upper mold shell 23 to reset upward, and the lifting module can drive the lower support mold 3 to reset downward, so that the lower support mold 3 and the pallet frame 2 are re-connected and fixed together, and the lifting module is separated from the lower support mold 3. After that, the pallet frame 2, the lower support mold 3 and the injection molded parts 4 can continue to be transported by the synchronous belt conveyor 1.

[0048] Reference Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig. 9 and Fig.10 The cutting unit includes four elastic guide members 3 214, two pressing plates 215, two pads 216, two cutters 1 217, a cutter 2 218, a lower pressing plate 219 and a cutter 3 220; the elastic guide member 3 214 includes a telescopic rod 3 and a telescopic spring 3 sleeved on the outside of the telescopic rod 3, the two ends of the telescopic rod 3 are respectively connected to the upper mold shell 23 and the pressing plate 215, and the two ends of the telescopic spring 3 are respectively connected to the upper mold shell 23 and the pressing plate 215. In other embodiments, the elastic guide member 3 214 can also be a spring or an air spring, which will not be repeated here.

[0049] The two pressing plates 215 are respectively arranged on the front and rear sides of the bottom of the upper mold shell 23 through two elastic guide members 214. The two pads 216 are respectively arranged on the front and rear side ends inside the lower support mold 3, and are respectively matched with the corresponding pressing plates 215. The two cutters 217 are arranged inside the lower support mold 3, and are respectively located on the inner sides of the corresponding pads 216, and are used to cut the front and rear sides of the film. The cutter 218 is arranged inside the lower support mold 3 and is located on the inner side of the support plate 210, and is used to cut the right side of the film. The lower pressure plate 219 is arranged at the bottom of the upper mold shell 23 and is located on the outer side of the guide rail frame 211. The cutter 3 220 is arranged inside the lower support mold 3, and is matched with the lower pressure plate 219, and is used to cut the left side of the film.

[0050] After the film coating process is completed on the upper arc surface 41, the front side arc surface, the rear side arc surface 42 and the right side arc surface 44 of the injection molded part 4, the first cylinder 22 drives the upper mold shell 23 to move downward, and the film corresponding to the front and rear sides of the injection molded part 4 is pressed and fixed under the cooperation of the elastic guide member 3 214, the pressing plate 215 and the pad 216, so that the film corresponding to the front and rear sides of the injection molded part 4 is cut under the downward movement of the cutter 1 217; During the downward movement, the pressure plate 28 will cooperate with the support plate 210 to press the right end of the film, so that the cutter 218 can cut the film corresponding to the right side of the injection molded part 4 during the downward movement; when the film is pressed onto the left side plane 43 of the injection molded part 4, as the upper mold shell 23 continues to move downward, the lower pressure plate 219 will move downward accordingly, and after touching the cutter 3 220, the cutting of the film corresponding to the left side of the injection molded part 4 is completed.

[0051] Reference Figure 7 and Figure 8 The slitting knife 213 is tilted and located between the angle formed by the connecting line 1 45 between the upper arc surface 41 of the injection molded part 4 and the left plane 43 and the connecting line 2 46 between the upper arc surface 41 of the injection molded part 4 and the front arc surface and the rear arc surface 42.

[0052] After the film is pressed onto the upper curved surface 41, the front curved surface, the rear curved surface 42 and the right curved surface 44 of the injection molded part 4, the slitting knife can be used to slit the film at the corners on both sides of the left side plane 43 of the injection molded part 4 along the inclined direction between the angle formed by the slitting knife 213 parallel to the left side plane 43 of the injection molded part 4 and the connecting line parallel to the upper curved surface 41 and the left side plane 43 of the injection molded part 4, and then the film can be pressed onto the left side plane 43 of the injection molded part 4.

[0053] In another embodiment, the slitting knife 213 is parallel to a connecting line 1 45 between the upper arc surface 41 and the left plane 43 of the injection molded part 4 or parallel to a connecting line 2 46 between the upper arc surface 41 and the rear arc surface 42 of the injection molded part 4 .

[0054] After the film is pressed onto the upper curved surface 41, the front curved surface, the rear curved surface 42 and the right curved surface 44 of the injection molded part 4, a slitting knife can be used to perform slits on the film at the corners on both sides of the left side plane 43 of the injection molded part 4 along a direction parallel to a connecting line 1 45 between the upper curved surface 41 and the left side plane 43 of the injection molded part 4 or a direction parallel to a connecting line 2 46 between the upper curved surface 41 and the front curved surface and the rear curved surface 42 of the injection molded part 4, and then the film can be pressed onto the left side plane 43 of the injection molded part 4.

[0055] Reference Figure 1 , Figure 7 , Figure 8 and Fig.11 The laminating module also includes an auxiliary laminating unit for laminating the film corners. The auxiliary laminating unit can press the film corners generated when the slits are opened onto the injection molded part 4, thereby improving the flatness and protection effect of the film at the corners of the injection molded part 4 and preventing the film corners from causing the film to loosen or fall off the injection molded part 4.

[0056] Reference Figure 1 , Figure 7 , Figure 8 and Fig.11 The auxiliary laminating unit includes an auxiliary pressing plate 221, two fixing frames 222, two second air cylinders 223 and two second flexible pressing blocks 224; the second flexible pressing blocks 224 are EVA foam or air bags.

[0057] The auxiliary pressure plate 221 is arranged at the bottom of the upper mold shell 23, and is used to press the edges and corners of the film connected to the front and rear side films. The bottom of the auxiliary pressure plate 221 is an arc-shaped structure that is compatible with the front and rear arc surfaces 42; two fixed frames 222 are arranged at the side ends of the synchronous belt conveyor 1 and correspond to the two sides of the left side plane 43 of the injection molded part 4, respectively. The two second cylinders 223 are respectively arranged laterally on the fixed frames 222, and the two flexible pressure blocks 224 are respectively arranged on the output shafts of the second cylinders 223, and are used to press the edges and corners of the film connected to the left side film. The two flexible pressure blocks 224 are close to the side of the left side plane 43 of the injection molded part 4, which are arc-shaped structures that are compatible with the front and rear arc surfaces 42.

[0058] When it is necessary to perform a pressing process on the edges and corners of the film connected to the front and rear side films, after completing the cutting process on the left side of the film, the first cylinder 22 can be used to make the upper mold shell 23 continue to move downward a certain distance, so that the auxiliary pressure plate 221 moves downward a certain distance. During the downward movement, the auxiliary pressure plate 221 will press the edges and corners of the film connected to the front and rear side films on the film at the left side plane 43 of the injection molded part 4, and perform film edging process on the edges at the two corners on the left side; thereafter, the first cylinder 22 can be used to drive the upper mold shell 23 and the auxiliary pressure plate 221 to reset upward.

[0059] When it is necessary to perform a pressing treatment on the edge corners of the film connected to the left film, after the upper mold shell 23 is reset upward, the output shaft of the second cylinder 223 can be extended to a certain length, so that the flexible pressure block 224 can move toward the direction close to the injection molded part 4, so that the flexible pressure block 224 can press the edge corners of the film on the front arc surface and the rear arc surface 42 of the injection molded part 4, and perform film edging treatment on the edges at the two corners on the left end. Thereafter, the flexible blades can be reset by the second cylinder 223, and then the injection molded part 4 can be reset to the synchronous belt conveyor 1.

[0060] When the film is slit at the corners on both sides of the left plane 43 of the injection molded part 4 along the direction parallel to the connecting line 45 of the upper curved surface 41 and the left plane 43 of the injection molded part 4, only the film corners connected to the left film will be produced. Only two fixing frames 222, two second cylinders 223 and two flexible pressing blocks 224 are required to cooperate to press the above-mentioned film corners onto the front curved surface and the rear curved surface 42.

[0061] When the film is slit at the corners on both sides of the left side plane 43 of the injection molded part 4 along the direction of the connecting line 46 parallel to the upper arc surface 41 of the injection molded part 4 and the front arc surface and the rear arc surface 42, only the film corners connected to the front and rear side films will be produced, and the above-mentioned film corners only need to be pressed onto the left side plane 43 by the auxiliary pressing plate 221.

[0062] When the slitting process is performed along the inclined direction between the angle formed by the connecting line 1 45 between the upper arc surface 41 of the injection molded part 4 and the left plane 43 and the connecting line 2 46 between the upper arc surface 41 of the injection molded part 4 and the front arc surface and the rear arc surface 42, film corners connected to the left film and film corners connected to the front and rear side films will be generated. The film corners connected to the front and rear side films are first pressed and laminated, and then the film corners connected to the left film are pressed and laminated.

[0063] Reference Figure 1 and Figure 2 The lifting module includes a third cylinder 31 and a lifting plate 32. The third cylinder 31 is vertically arranged on the ground. The lifting plate 32 is arranged at the upper end of the output shaft of the third cylinder 31, and the lifting plate 32 can be clamped and fixed with the bottom of the lower support mold 3.

[0064] By simply extending the output shaft of the third cylinder 31 by a certain length, the lifting plate 32 can be moved upward, first clamped and fixed with the bottom of the lower support mold 3, and then the lower support mold 3 and the injection molded part 4 can be lifted up from the synchronous belt conveyor 1. Subsequently, the output shaft of the third cylinder 31 can be shortened downward by a certain length, so that the lifting plate 32 drives the lower support mold 3 and the film-coated injection molded part 4 to move downward, so that the lower support mold 3 is clamped and fixed with the tray frame 2 again, and returns to the synchronous belt conveyor 1, and the lifting plate 32 is separated from the lower support mold 3, and then reset downward.

[0065] It also includes a plurality of plug-in posts and a plurality of plug-in holes; the plurality of plug-in posts are arranged on two synchronous belts of the synchronous belt conveyor 1; the plurality of plug-in holes are arranged on the pallet frame 2 and are adapted to the plurality of plug-in posts.

[0066] The insertion and fixing of the pallet frame 2 and the synchronous belt of the synchronous belt conveyor 1 can be achieved by the insertion and matching of the insertion column and the insertion hole.

[0067] It also includes a snap-in groove and a snap-in protrusion. The snap-in groove is arranged on the top of the tray frame 2 and is matched with the lower supporting mold 3 . The snap-in protrusion is arranged on the top of the lower supporting mold 3 and is matched with the injection molded part 4 .

[0068] The lower support mold 3 can be fixedly connected to the tray frame 2 by the cooperation of the clamping groove, so that the tray frame 2 and the lower support mold 3 can be flexibly fixed. The lower support mold 3 can be fixedly connected to the injection molded part 4 by the cooperation of the clamping protrusion, so that the lower support mold 3 and the injection molded part 4 can be flexibly fixed.

[0069] The implementation principle of the embodiment of the present application is: after an injection molded part 4 to be coated is conveyed to the bottom of the upper mold shell 23 by the synchronous belt conveyor 1, the synchronous belt conveyor 1 can be suspended, and then the lower supporting film and the injection molded part 4 to be coated can be lifted from the synchronous belt conveyor 1 by the lifting module, and then the film can be pressed onto the upper arc surface 41, the front arc surface and the rear arc surface 42 of the injection molded part 4 in a manner of gradually expanding from the center to the outside, and then the film can be covered on the right side arc surface 44 of the injection molded part 4, and then the front and rear side ends and the right side end of the film can be cut, and the two corners of the left side end of the film can be slit, and then the film can be covered on the left side plane 43 of the injection molded part 4, and then the left side end of the film can be cut.

[0070] After that, the film corners connected to the front and rear side ends of the film can be pressed onto the film on the left plane 43 of the injection molded part 4, and then the upper mold shell 23 can be reset upward, and then the film corners connected to the left end of the film can be pressed onto the front and rear curved surfaces 42 of the injection molded part 4. Then, the lower support mold 3 and the film-coated injection molded part 4 can be returned to the synchronous belt conveyor 1, and then the synchronous belt conveyor 1 can continue to operate.

[0071] In addition, it should be noted that in the description of this application, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0072] The above are preferred implementations of the present application. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A device for coating the surface of injection molded parts for air conditioner production, comprising a synchronous belt conveyor (1), a plurality of tray frames (2) being clamped on the synchronous belt conveyor (1), a lower support mold (3) being clamped on the tray frame (2), an injection molded part (4) to be coated being clamped on the lower support mold (3), and a lifting module and a coating module, characterized in that: The laminating module comprises a mounting frame (21) arranged at the side end of the synchronous belt conveyor (1), a first cylinder (22) being vertically arranged on the mounting frame (21), an upper mold shell (23) being arranged at the lower end of the output shaft of the first cylinder (22), a pressing plate (25) for pressing a film onto the upper curved surface (41), the front curved surface and the rear curved surface (42) of the injection molded part being arranged at the bottom of the upper mold shell (23) through an elastic guide member (24), a flexible pressing block (26) being arranged at the bottom of the pressing plate (25), the center position of the flexible pressing block (26) being the highest and gradually extending toward the side end; a flexible pressing block (26) for pressing a film onto the upper curved surface (41), the front curved surface and the rear curved surface (42) of the injection molded part being arranged at the bottom of the upper mold shell (23). The film is pressed against a second pressing plate (28) on the right curved surface (44) of the injection molded part (4); a support plate (210) adapted to the second pressing plate (28) is provided in the lower support mold (3) through a second elastic guide member (29); an L-shaped guide rail frame (211) located at both ends of the first pressing plate (25) is provided at the bottom of the upper mold shell (23); a third pressing plate (212) for pressing the film against the left flat surface (43) of the injection molded part (4) is rotatably provided between the two guide rail frames (211); and a slitting knife (213) for slitting the film at the corners on both sides of the left flat surface (43) is vertically provided at the bottom of the upper mold shell (23).

2. The surface coating device for injection molded parts for air conditioner production according to claim 1, characterized in that: The film further comprises a pressing plate (215) arranged on the front and rear sides of the bottom of the upper mold shell (23) through a third elastic guide member (214); the front and rear side ends inside the lower support mold (3) are respectively provided with pads (216) matched with the corresponding pressing plates (215); the lower support mold (3) is also provided with a first cutter (217) located on the inner side of the corresponding pad (216) and used for cutting the front and rear sides of the film; the lower support mold (3) is also provided with a second cutter (218) located on the inner side of the support plate (210) and used for cutting the right side of the film; the bottom of the upper mold shell (23) is also provided with a lower pressing plate (219) located on the outer side of the guide rail frame (211); the lower support mold (3) is provided with a third cutter (220) matched with the lower pressing plate (219) and used for cutting the left side of the film.

3. The surface coating device for injection molded parts for air conditioner production according to claim 2, characterized in that: The slitting knife (213) is parallel to a first connecting line (45) between the upper curved surface (41) of the injection molded part (4) and the left side plane (43) or is parallel to a second connecting line (46) between the upper curved surface (41) of the injection molded part (4) and the rear curved surface (42).

4. The surface coating device for injection molded parts for air conditioner production according to claim 2, characterized in that: The slitting knife (213) is arranged at an angle, and the slitting knife (213) is located between the angle formed by the first connecting line (45) between the upper curved surface (41) of the injection molded part (4) and the left side plane (43) and the second connecting line (46) between the upper curved surface (41) of the injection molded part (4) and the rear curved surface (42).

5. The surface coating device for injection molded parts for air conditioner production according to claim 3 or 4, characterized in that: The laminating module further comprises an auxiliary pressing plate (221) arranged at the bottom of the upper mold shell (23) and used for pressing and covering the film corners connected to the front and rear side films, the bottom of the auxiliary pressing plate (221) being an arc-shaped structure adapted to the front and rear arc surfaces (42); the side ends of the synchronous belt conveyor (1) are further provided with fixing frames (222) corresponding to the two sides of the left side plane (43) of the injection molded part (4), respectively, and second cylinders (223) are respectively arranged transversely on the two fixing frames (222), and flexible pressing blocks (224) (224) (224) are respectively arranged on the output shafts of the two second cylinders (223) for pressing and covering the film corners connected to the left side film, and the two flexible pressing blocks (224) (224) are both arc-shaped structures adapted to the front and rear arc surfaces (42) on the sides close to the left side plane (43) of the injection molded part (4).

6. The surface coating device for injection molded parts for air conditioner production according to claim 1, characterized in that: The lifting module comprises a third cylinder (31) vertically arranged on the ground, and the upper end of the output shaft of the third cylinder (31) is provided with a lifting plate (32) capable of being clamped and fixed to the bottom of the lower support mold (3).

7. The surface coating device for injection molded parts for air conditioner production according to claim 1, characterized in that: The two synchronous belts of the synchronous belt conveyor (1) are provided with a plurality of plug-in posts, and the pallet frame (2) is provided with plug-in holes that are compatible with the plurality of plug-in posts.

8. The surface coating device for injection molded parts for air conditioner production according to claim 1, characterized in that: The top of the tray frame (2) is provided with a clamping groove matched with the lower support mold (3), and the top of the lower support mold (3) is provided with a clamping protrusion matched with the injection molded part (4).

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