Spraying machine for door body machining

Abstract

A spraying machine for door body machining comprises a spraying machine body, and the spraying machine body comprises a workbench and a cover body. The workbench is further provided with a sliding door structure and a door plate conveying structure. The door plate conveying structure comprises a sliding rail, a first motor, a first lead screw, a first nut seat and a sliding plate. Sliding cavities are formed in the sliding rails, and strip-shaped through grooves are formed in the left ends and the right ends of the sliding rails. Sliding blocks are fixed to the left end and the right end of the first nut base. Longitudinal plates are fixed to the two sliding blocks. And a sliding plate is fixedly connected between the two longitudinal plates. The sliding door structure comprises a cavity, a second motor, a rotating shaft, a lifting door, two driving gears and two longitudinal rods. Sliding grooves are formed in the opposite sides of the two longitudinal rods. A second lead screw is rotationally connected into the sliding groove. A driven gear is fixed to the bottom end of the second lead screw. The second lead screw is sleeved with a second nut seat. A notch is formed in the bottom end of the lifting door. According to the utility model, the door plate can be more conveniently placed in the cover body.

Description

Technical Field

[0001] The utility model relates to the technical field related to door and window processing equipment, in particular to a spraying machine for door body processing. Background Art

[0002] The applicant has previously applied for and been granted a utility model patent with an authorization announcement number of CN218188767U, which is a dust reduction mechanism of a spray machine for door body processing, including a base, on which a workbench is installed; a cover body, which is installed on the base, and the workbench is located inside the cover body; a dust reduction channel, which is opened on the base, and an air inlet connected to the dust reduction channel is opened at the lower end of the workbench, and an air outlet connected to the dust reduction channel is opened on the side wall of the base; a spraying device, which is arranged in the cover body and is used for spraying; a mounting frame, which is arranged in the dust reduction channel and has a filter installed on it; a fan, which is installed on the mounting frame; a first nozzle, which is installed on the mounting frame and connected to an external water supply mechanism, the first nozzle is located on the side of the fan away from the filter, and is used to spray water into the mounting frame; the beneficial effects of the utility model are: good dust reduction effect and convenient use.

[0003] However, the applicant found in the actual use of the utility model that due to the setting of the cover, the staff could not place the door panel from top to bottom. Instead, they had to insert one end of the door panel into the cover first, with the lower surface of the door panel attached to the top of the workbench, and then push the door panel into the cover to slide it in. This process is time-consuming and laborious, and the lower surface of the door panel may be worn in the process of pushing the door panel.

[0004] Therefore, the utility model proposes a technical solution to solve the problem that the process of placing the door panel into the cover body is time-consuming and labor-intensive. Utility Model Content

[0005] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a spraying machine for door body processing, aiming to achieve the technical effect of more conveniently placing the door panel into the cover.

[0006] A spraying machine for door body processing, comprising a spraying machine body, the spraying machine body comprising a workbench and a cover body, the cover body being fixed to the rear side of the top end of the device body and being a cylindrical structure with a bottom end and a front end open, a spraying structure being arranged in the cover body, and a sliding door structure and a door panel conveying structure being also arranged on the workbench;

[0007] The cam is secured to the top of the workbench and is equipped with a first motor, a second motor, a second nut seat, and a slider that slides forward and backward along the strip through the slot. The ends of the two sliders that face each other extend out of the slide and are secured to the top of the workbench and are equipped with a second motor.

[0008] The sliding door structure includes a cavity, a second motor, a rotating shaft, a lifting door, two driving gears and two longitudinal rods. The cavity is opened inside the workbench, and the rotating shaft is rotatably connected between the left and right cavity walls of the cavity through a bearing. The second motor is installed on the outer wall of the workbench to drive the rotating shaft to rotate. The two driving gears are fixedly sleeved on the outside of the rotating shaft, and the two longitudinal rods are fixed to the top of the workbench and are symmetrically arranged on the left and right sides. The two longitudinal rods are provided with a sliding groove extending longitudinally up and down on the opposite sides. A second screw rod is rotatably connected in the sliding groove through a bearing, and the bottom end of the second screw rod penetrates into the cavity and is fixed with a driven gear meshing with the driving gear. The outside of the second screw rod is sleeved with a second nut seat that moves up and down along the sliding groove in a threaded connection manner. The lifting door is fixedly connected between the two second nut seats to cover the front end opening of the cover body, and the rear side of the lifting door is in contact with the front side of the cover body, and the bottom end of the lifting door is in contact with the top of the workbench and is provided with a notch matching the slide rail.

[0009] By adopting the above technical solution, when the door panel needs to be placed in the cover, first slide the sliding plate out of the cover along the slide rail, and then directly place the door panel on the sliding plate. At this time, there is no obstruction around the sliding plate, and the door panel can be easily placed on the sliding plate. Then slide the sliding plate into the cover along the slide rail, thereby driving the door panel into the cover. Finally, lower the lifting door to block the front end opening of the cover. After the lifting door is lowered, the bottom end of the lifting door fits with the top of the workbench, and the lifting door is sleeved on the outside of the slide rail through the notch at its bottom, and the inner side wall of the notch fits with the outer side wall of the slide rail, so that the lifting door can effectively block the front end opening of the cover. Similarly, after the spraying is completed, the lifting door is raised, and the sliding plate is slid out of the cover to remove the door panel from the cover, and the staff can then remove the door panel from the sliding plate.

[0010] The sliding principle of the sliding plate is as follows: the first motor is started, and the first motor drives the first screw to rotate. The rotation of the first screw drives the first nut seat to slide forward and backward along the sliding cavity. The first nut seat drives the slider to slide forward and backward along the strip-shaped through groove. The slider drives the longitudinal plate to slide forward and backward. The longitudinal plate drives the sliding plate to slide forward and backward.

[0011] The lifting principle of the lifting door is as follows: the second motor is started, and the second motor drives the rotating shaft to rotate. The rotating shaft drives the driving gear to rotate. The driving gear drives the driven gear to rotate. The driven gear drives the second screw rod to rotate. The second screw rod drives the second nut seat to move up and down along the slide slot. The second nut seat drives the lifting door to move up and down.

[0012] The utility model can more conveniently place the door panel into the cover body, and in the process of placing the door panel into the cover body, no friction is generated between the door panel and the sliding plate, and wear of the door panel can also be avoided.

[0013] The utility model is further configured as follows: a groove is provided in the middle of the top of the sliding plate, a plurality of rotating rollers arranged at equal intervals are rotatably connected in the groove, and the top of the rotating rollers is located above the sliding plate.

[0014] By adopting the above technical solution, when it is necessary to remove the painted door panel from the sliding plate, since the door panel is completely placed on the sliding plate and is heavy, it is inconvenient for the staff to pick it up. At this time, the door panel can be moved a short distance so that a part of the door panel is offset from the sliding plate, which is convenient for the staff to pick up the door panel. Therefore, the provision of the rotating roller can make the movement of the door panel on the sliding plate smoother and can also prevent the door panel and the sliding plate from being damaged due to friction.

[0015] The utility model is further configured as follows: a limiting plate is fixed to the rear side of the top end of the sliding plate.

[0016] By adopting the above technical solution and setting the limit plate, the door panel can be prevented from sliding forward and deviating due to inertia when entering the cover body along with the sliding plate.

[0017] Further configuration of the utility model: the sprayer body also includes a dust removal and purification structure, which includes a bracket, a spray dust removal device, an activated carbon purifier, a drying box and a fan. The bracket is located on the rear side of the workbench, and the bracket includes a support plate and a plurality of support rods fixed to the bottom end of the support plate, and a partition located below the support plate is fixed between the plurality of support rods. The spray dust removal device is placed on the ground and is located below the partition, and the drying box is placed on the top of the partition and is located below the support plate. The activated carbon purifier is placed on the top of the support plate, and the rear side of the cover body is connected to the air inlet of the spray dust removal device through a fan and a pipeline, the air outlet of the spray dust removal device is connected to the air inlet of the drying box through a pipeline, and the air outlet of the drying box is connected to the air inlet of the activated carbon purifier through a pipeline.

[0018] By adopting the above technical solution, dust and other impurities generated during the spraying process enter the spray dust removal equipment under the action of the fan, and the spray dust removal equipment performs dust reduction treatment. Then, after being dried in a drying oven, it enters the activated carbon purifier for purification and is discharged.

[0019] The utility model is further configured as follows: the drying box comprises a box body and a drying plate arranged in the box body, the upper and lower ends of the box body are respectively connected with an air outlet pipe and an air inlet pipe, two symmetrically arranged clamping strips are fixed on the inner side wall of the box body, the drying plate comprises an annular outer frame and two filter screens, the two ends of the annular outer frame are respectively clamped on the top ends of the two clamping strips, the two filter screens are respectively detachably connected to the upper and lower ends of the annular outer frame by bolts, and a plurality of granular water-absorbing resins are filled between the two filter screens.

[0020] By adopting the above technical solution, the gas coming out of the spray dust removal equipment will contain water vapor, which needs to be dried in the drying box before being discharged into the activated carbon purifier. When the gas passes through the drying plate, the water vapor in it will be quickly absorbed by the granular water-absorbing resin, thereby achieving a drying effect. When the granular water-absorbing resin needs to be replaced, the drying plate is pulled out of the box and the bolts on the filter are unscrewed. After the granular water-absorbing resin is replaced, the drying plate is placed in the box and stuck on the card strip.

[0021] Compared with the prior art, the beneficial effects of the utility model are:

[0022] A spraying machine for door body processing. The utility model can more conveniently place a door panel into a cover body, and during the process of placing the door panel into the cover body, no friction will be generated between the door panel and the sliding plate, and wear of the door panel can also be avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the structure of a spray coating machine for door body processing according to the utility model;

[0024] Figure 2 It is a cross-sectional view of a spray coating machine for door body processing according to the utility model in a side view direction;

[0025] Figure 3 for Figure 2 The enlarged view of point A in the middle;

[0026] Figure 4 for Figure 2 The enlarged view of point B in the middle;

[0027] Figure 5 This is a cross-sectional view of a spray coating machine for door body processing according to the utility model in the main viewing direction;

[0028] Figure 6 It is a cross-sectional view in the main viewing direction of a door panel conveying structure of a spraying machine for door body processing according to the utility model.

[0029] Figure numerals: 1, workbench; 2, cover; 3, spraying structure; 4, slide rail; 5, first motor; 6, first screw rod; 7, first nut seat; 8, sliding plate; 9, sliding cavity; 10, strip-shaped through groove; 11, slider; 12, longitudinal plate; 13, groove; 14, rotating roller; 15, limit plate; 16, cavity; 17, second motor; 18, rotating shaft; 19, lifting door; 20, driving gear; 21, longitudinal rod; 22, slide groove ; 23. Second screw rod; 24. Driven gear; 25. Second nut seat; 26. Notch; 27. Bracket; 28. Spray dust removal equipment; 29. ​​Activated carbon purifier; 30. Fan; 31. Drying box; 32. Support plate; 33. Support rod; 34. Partition; 35. Box; 36. Drying plate; 37. Exhaust pipe; 38. Inlet pipe; 39. Card strip; 40. Annular outer frame; 41. Filter; 42. Granular water-absorbent resin. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] A spraying machine for door body processing, such as Figure 1-Figure 6 As shown, the spraying machine includes a spraying machine body, which includes a workbench 1, a cover body 2 and a dust removal and purification structure.

[0032] The cover body 2 is fixed to the rear side of the top of the device body, and is a cylindrical structure with a bottom end and a front end opened. A spraying structure 3 is arranged inside the cover body 2.

[0033] The workbench 1 is provided with a sliding door structure and a door panel conveying structure.

[0034] The door panel conveying structure includes a slide rail 4, a first motor 5, a first screw rod 6, a first nut seat 7 and a sliding plate 8. The slide rail 4 is fixed to the top of the workbench 1 and extends horizontally forward and backward. The rear end of the slide rail 4 penetrates into the cover body 2. A slide cavity 9 extending in the same direction as the slide rail 4 is provided inside the slide rail 4. Both left and right ends of the slide rail 4 are provided with a strip-shaped through groove 10 that communicates with the slide cavity 9 and extends horizontally forward and backward. The first screw rod 6 is rotatably connected between the front and rear side walls of the slide cavity 9 through a bearing. The first motor 5 is installed at the front end of the slide rail 4 to drive the first screw rod 6 to rotate. The first nut seat 7 is sleeved on the outside of the first screw rod 6 in a threaded connection manner and moves forward and backward along the slide cavity 9. Slide blocks 11 that slide forward and backward along the strip-shaped through groove 10 are fixed to the left and right ends of the first nut seat 7. The ends of the two slide blocks 11 that are separated from each other penetrate the slide cavity 9 and are fixed with longitudinal plates 12. The sliding plate 8 is fixedly connected between the tops of the two longitudinal plates 12 and is located above the slide rail 4.

[0035] The sliding plate 8 is used to place the door panel. A groove 13 is provided in the middle of the top of the sliding plate 8. A plurality of rotating rollers 14 arranged at equal intervals are rotatably connected in the groove 13. The top of the rotating roller 14 is located above the sliding plate 8. A limit plate 15 is fixed to the rear side of the top of the sliding plate 8.

[0036] The sliding door structure includes a cavity 16, a second motor 17, a rotating shaft 18, a lifting door 19, two driving gears 20 and two longitudinal rods 21. The cavity 16 is opened inside the workbench 1. The rotating shaft 18 is rotatably connected between the left and right side walls of the cavity 16 through a bearing. The second motor 17 is installed on the outer wall of the workbench 1 to drive the rotating shaft 18 to rotate. The two driving gears 20 are fixedly sleeved on the outside of the rotating shaft 18. The two longitudinal rods 21 are fixed to the top of the workbench 1 and are symmetrically arranged on the left and right. The two longitudinal rods 21 are provided with a sliding groove 22 extending vertically up and down on the opposite side. The sliding groove 22 is rotatably connected with a second screw rod 23 through a bearing. The bottom end of the second screw rod 23 penetrates into the cavity 16 and is fixed with a driven gear 24 meshing with the driving gear 20. The outside of the second screw rod 23 is sleeved with a second nut seat 25 that moves up and down along the sliding groove 22 in a threaded connection. The lifting door 19 is fixedly connected between the two second nut seats 25 to cover the front opening of the cover body 2. The rear side of the lifting door 19 fits with the front side of the cover body 2. The bottom end of the lifting door 19 fits with the top end of the workbench 1 and is provided with a notch 26 matching the slide rail 4.

[0037] The dust removal and purification structure includes a bracket 27, a spray dust removal device 28, an activated carbon purifier 29, a drying box 31 and a fan 30. The bracket 27 is located at the rear side of the workbench 1. The bracket 27 includes a support plate 32 and a plurality of support rods 33 fixed to the bottom end of the support plate 32. A partition 34 located below the support plate 32 is fixed between the plurality of support rods 33. The spray dust removal device 28 is placed on the ground and is located below the partition 34. The drying box 31 is placed at the top of the partition 34 and is located below the support plate 32. The activated carbon purifier 29 is placed at the top of the support plate 32. The rear side of the cover body 2 is connected to the air inlet of the spray dust removal device 28 through the fan 30 and the pipeline. The air outlet of the spray dust removal device 28 is connected to the air inlet of the drying box 31 through a pipeline. The air outlet of the drying box 31 is connected to the air inlet of the activated carbon purifier 29 through a pipeline. The spray dust removal equipment 28, the activated carbon purifier 29 and the fan 30 are mature existing technologies. In this embodiment, the spray dust removal equipment 28 can adopt the dust reduction spray equipment of model RY-141, the activated carbon purifier 29 can adopt the dry filtering exhaust gas purifier of model QH-HXT, and the fan 30 can adopt the dust collection equipment fan 30 of model TB125.

[0038] The drying box 31 includes a box body 35 and a drying plate 36 disposed in the box body 35. The upper and lower ends of the box body 35 are respectively connected with an air outlet pipe 37 and an air inlet pipe 38. Two symmetrically arranged clamping strips 39 are fixed on the inner side wall of the box body 35. The drying plate 36 includes an annular outer frame 40 and two filter screens 41. The two ends of the annular outer frame 40 are respectively clamped on the top of the two clamping strips 39. The two filter screens 41 are detachably connected to the upper and lower ends of the annular outer frame 40 by bolts. A plurality of granular water-absorbing resins 42 are filled between the two filter screens 41.

[0039] Working process: When the door panel needs to be placed in the cover body 2, the sliding plate 8 is first slid out of the cover body 2 along the slide rail 4, and then the door panel is directly placed on the sliding plate 8. At this time, there is no shielding around the sliding plate 8, and the door panel can be easily placed on the sliding plate 8. Then the sliding plate 8 is slid into the cover body 2 along the slide rail 4, thereby driving the door panel into the cover body 2. In the process of the sliding plate 8 driving the door panel into the cover body 2, the setting of the limit plate 15 can prevent the door panel from sliding forward and deviating due to the action of inertia.

[0040] Then, the lifting door 19 is lowered to cover the front opening of the cover body 2. After the lifting door 19 is lowered, the bottom end of the lifting door 19 is fitted with the top end of the workbench 1, and the lifting door 19 is sleeved on the outside of the slide rail 4 through the notch 26 at its bottom, and the inner side wall of the notch 26 is fitted with the outer side wall of the slide rail 4, so that the lifting door 19 can effectively cover the front opening of the cover body 2.

[0041] Then the door panel is sprayed by the spraying structure 3 .

[0042] During the spraying operation, dust and other impurities will enter the spray dust removal device 28 under the action of the fan 30, and the spray dust removal device 28 will perform dust reduction treatment. The gas coming out of the spray dust removal device 28 will contain water vapor, which needs to be dried in the drying box 31 before being discharged into the activated carbon purifier 29. After the gas enters the drying box 31, it will pass through the drying plate 36, and the water vapor in it will be quickly absorbed by the granular water-absorbing resin 42, thereby achieving a drying effect. Finally, the gas enters the activated carbon purifier 29 for purification and is discharged.

[0043] After the spraying is completed, the lifting door 19 is raised, and the sliding plate 8 is slid out of the cover body 2 to remove the door panel from the cover body 2, and the staff can then remove the door panel from the sliding plate 8. When it is necessary to remove the sprayed door panel from the sliding plate 8, since the door panel is completely placed on the sliding plate 8 and the door panel is heavy, it is inconvenient for the staff to pick it up. At this time, the door panel can be moved a short distance so that a part of the door panel is staggered with the sliding plate 8, which is convenient for the staff to pick up the door panel. Therefore, the provision of the rotating roller 14 can make the movement of the door panel on the sliding plate 8 smoother, and can also prevent the door panel and the sliding plate 8 from being damaged due to friction.

[0044] The sliding principle of the sliding plate 8 is as follows: the first motor 5 is started, and the first motor 5 drives the first screw 6 to rotate. The rotation of the first screw 6 drives the first nut seat 7 to slide forward and backward along the sliding cavity 9. The first nut seat 7 drives the slider 11 to slide forward and backward along the strip-shaped through groove 10. The slider 11 drives the longitudinal plate 12 to slide forward and backward. The longitudinal plate 12 drives the sliding plate 8 to slide forward and backward.

[0045] The lifting principle of the lifting door 19 is as follows: the second motor 17 is started, and the second motor 17 drives the rotating shaft 18 to rotate. The rotating shaft 18 drives the driving gear 20 to rotate. The driving gear 20 drives the driven gear 24 to rotate. The driven gear 24 drives the second screw rod 23 to rotate. The second screw rod 23 drives the second nut seat 25 to move up and down along the slide groove 22. The second nut seat 25 drives the lifting door 19 to move up and down.

[0046] When the drying plate 36 is used for a long time, the granular water-absorbing resin 42 in the drying plate 36 needs to be replaced. The drying plate 36 only needs to be pulled out of the box 35 and the bolts on the filter screen 41 are screwed off. After the granular water-absorbing resin 42 is replaced, the drying plate 36 is put into the box 35 and is clamped on the clamping strip 39.

[0047] The utility model can more conveniently place the door panel into the cover body 2, and during the process of placing the door panel into the cover body 2, no friction will be generated between the door panel and the sliding plate 8, and wear of the door panel can also be avoided.

[0048] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0049] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "set / connected", "connected", etc. should be understood in a broad sense. For example, "connected" 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 ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0050] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0051] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A spraying machine for door body processing, comprising a spraying machine body, the spraying machine body comprising a workbench (1) and a cover body (2), the cover body (2) being fixed to the rear side of the top end of the device body, and being a cylindrical structure with a bottom end and a front end open, a spraying structure (3) being arranged in the cover body (2), characterized in that: The workbench (1) is also provided with a sliding door structure and a door panel conveying structure; The door panel conveying structure comprises a slide rail (4), a first motor (5), a first screw rod (6), a first nut seat (7) and a sliding plate (8); the slide rail (4) is fixed to the top of the workbench (1) and extends transversely forward and backward; the rear end of the slide rail (4) penetrates into the cover body (2); a slide cavity (9) extending in the same direction as the slide rail (4) is provided inside the slide rail (4); both left and right ends of the slide rail (4) are provided with a strip-shaped through groove (10) which is in communication with the slide cavity (9) and extends transversely forward and backward; the first screw rod (6) is rotatably connected between the front and rear side walls of the slide cavity (9) through a bearing; the first motor ( 5) installed at the front end of the slide rail (4) for driving the first screw rod (6) to rotate, the first nut seat (7) is sleeved on the outside of the first screw rod (6) in a threaded connection manner and moves forward and backward along the slide cavity (9), the left and right ends of the first nut seat (7) are fixed with sliders (11) that slide forward and backward along the strip-shaped through groove (10), the two ends of the sliders (11) that are away from each other pass through the slide cavity (9) and are fixed with longitudinal plates (12), the sliding plate (8) is fixedly connected between the top ends of the two longitudinal plates (12) and is located above the slide rail (4), and the sliding plate (8) is used to place the door panel; The sliding door structure comprises a cavity (16), a second motor (17), a rotating shaft (18), a lifting door (19), two driving gears (20) and two longitudinal rods (21); the cavity (16) is opened inside the workbench (1); the rotating shaft (18) is rotatably connected between the left and right cavity walls of the cavity (16) through a bearing; the second motor (17) is installed on the outer wall of the workbench (1) to drive the rotating shaft (18) to rotate; the two driving gears (20) are fixedly sleeved on the outside of the rotating shaft (18); the two longitudinal rods (21) are fixed to the top of the workbench (1) and are symmetrically arranged on the left and right; and the two longitudinal rods (21) are provided with upper and lower longitudinal extensions on opposite sides thereof. A second screw rod (23) is rotatably connected to the slide groove (22) through a bearing, the bottom end of the second screw rod (23) penetrates into the cavity (16) and is fixed with a driven gear (24) meshing with the driving gear (20), the outside of the second screw rod (23) is sleeved with a second nut seat (25) that moves up and down along the slide groove (22) in a threaded connection manner, the lifting door (19) is fixedly connected between the two second nut seats (25) to cover the front end opening of the cover body (2), the rear side of the lifting door (19) is in contact with the front side of the cover body (2), the bottom end of the lifting door (19) is in contact with the top end of the workbench (1) and is provided with a notch (26) that matches the slide rail (4).

2. A spraying machine for door processing according to claim 1, characterized in that: A groove (13) is provided in the middle of the top end of the sliding plate (8), and a plurality of rotating rollers (14) arranged at equal intervals are rotatably connected in the groove (13), and the top ends of the rotating rollers (14) are located above the sliding plate (8).

3. A spraying machine for door processing according to claim 2, characterized in that: A limiting plate (15) is fixed to the rear side of the top end of the sliding plate (8).

4. A spray coating machine for door processing according to claim 1, characterized in that: The spraying machine body also includes a dust removal and purification structure, which includes a bracket (27), a spray dust removal device (28), an activated carbon purifier (29), a drying box (31) and a fan (30). The bracket (27) is located at the rear side of the workbench (1). The bracket (27) includes a support plate (32) and a plurality of support rods (33) fixed to the bottom end of the support plate (32). A partition plate (34) located below the support plate (32) is fixed between the plurality of support rods (33). The spray dust removal device (28) is placed on the ground and is located The drying box (31) is placed at the top of the partition (34) and below the support plate (32). The activated carbon purifier (29) is placed at the top of the support plate (32). The rear side of the cover body (2) is connected to the air inlet of the spray dust removal device (28) via a fan (30) and a pipeline. The air outlet of the spray dust removal device (28) is connected to the air inlet of the drying box (31) via a pipeline. The air outlet of the drying box (31) is connected to the air inlet of the activated carbon purifier (29) via a pipeline.

5. A spray coating machine for door processing according to claim 4, characterized in that: The drying box (31) comprises a box body (35) and a drying plate (36) arranged in the box body (35); the upper and lower ends of the box body (35) are respectively connected with an air outlet pipe (37) and an air inlet pipe (38); two symmetrically arranged clamping strips (39) are fixed on the inner side wall of the box body (35); the drying plate (36) comprises an annular outer frame (40) and two filter screens (41); the two ends of the annular outer frame (40) are respectively clamped on the top ends of the two clamping strips (39); the two filter screens (41) are respectively detachably connected to the upper and lower ends of the annular outer frame (40) by bolts; and a plurality of granular water-absorbing resins (42) are filled between the two filter screens (41).

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