Furniture painting equipment and painting method

Abstract

The present invention belongs to the field of paint spraying technology, and in particular, relates to a paint spraying device and a paint spraying method for furniture, wherein the paint spraying device includes a spray gun, a nozzle, a paint cup and a main air pipe, and is characterized in that it also includes a spray barrel, which is used to determine the spraying position of the paint atomization area formed by the nozzle and adjust the final spraying shape of the atomized paint according to the width and position of the spraying area on the furniture. In the present invention, two No. 1 baffles, two No. 2 baffles and two No. 3 baffles on each No. 2 baffle in the square barrel of the spray barrel can adjust the paint atomization area sprayed by the nozzle according to the width of the sprayed surface, so that the spraying area finally formed by the paint atomization area sprayed by the nozzle on the spraying surface can basically match the surface of the spraying surface and be basically completely blocked by the spraying surface, and the paint will not fly away due to not being blocked by the spraying surface, thereby avoiding the pollution of the environment and the waste of paint after the paint flies away.

Description

Technical Field

[0001] The invention belongs to the technical field of spray painting, and in particular relates to a spray painting device and a spray painting method for furniture. Background Art

[0002] Furniture painting is a surface treatment process used to improve the appearance of furniture and protect the wood. By using different types of paint and spraying techniques, furniture can be given different colors, textures and sheens while providing a protective layer against wear, moisture and chemical erosion.

[0003] Furniture is usually painted with a high-pressure spray gun, which is a tool that uses high-pressure air or other gases to atomize paint and spray it onto the surface of an object. It can provide a uniform and detailed coating and is suitable for surface treatment of various materials, such as metal, wood, plastic, etc. The characteristics of a high-pressure spray gun include high efficiency, paint saving, reduced paint mist splashing, and the ability to achieve thicker coatings.

[0004] When a high-pressure spray gun is used to spray paint on a spray surface, the nozzle is at a certain distance from the spray surface, and the sprayed paint is atomized into small droplets by the high-pressure air. After the paint is sprayed out of the nozzle, a conical atomization area is formed, and the paint surface sprayed on the spray surface is circular (except for slit nozzles).

[0005] like Fig.30 As shown, if the spraying area of ​​the nozzle on the spraying surface is finally circular, for the spraying of structures such as table legs or frames, during spraying, the surface of the frame structure behind the table legs is narrow and cannot completely block the atomized paint sprayed from the nozzle. For example, in patents CN201980059303.1, CN201721580151.4 and CN201720929845.8, the atomized paint sprayed from the nozzle cannot be completely blocked by the table legs or frame structure, so part of the paint passes through the table legs or frame structure and flies away. The paint that is not blocked by the table legs or frame structure and flies away will cause environmental pollution and paint waste.

[0006] The present invention designs a furniture painting device and a painting method to solve the above problems. Summary of the invention

[0007] Based on this, it is necessary to provide a furniture painting equipment and painting method for the problems existing in the current painting equipment. The cone cylinder at the end of the spray barrel in the present invention is convenient for the operator to observe the spraying position and determine the spraying area on the spraying surface to be sprayed because the cone area of ​​the atomized paint sprayed by the nozzle is located in the middle of the cone cylinder, thereby improving the spraying efficiency. The two No. 1 baffles, two No. 2 baffles and two No. 3 baffles on each No. 2 baffle in the square cylinder of the spray barrel in the present invention can adjust the atomized area of ​​the paint sprayed by the nozzle according to the width of the sprayed surface, so that the spraying area finally formed by the atomized area of ​​the paint sprayed by the nozzle on the spraying surface can basically match the surface of the spraying surface and be basically completely blocked by the spraying surface, and the paint will not fly away due to not being blocked by the spraying surface, thereby avoiding the pollution of the environment and the waste of paint after the paint flies away. The outer side of the spray barrel, the first baffle plate and the second baffle plate of the present invention are provided with a structure for timely recovering the liquid paint blocked by the first baffle plate, the second baffle plate and the third baffle plate, so that the paint sprayed from the oil nozzle will basically not be attached to the first baffle plate, the second baffle plate or the third baffle plate due to being partially blocked by the first baffle plate, the second baffle plate or the third baffle plate, and the first baffle plate, the second baffle plate and the third baffle plate are kept basically clean, avoiding the waste of paint while ensuring that the first baffle plate, the second baffle plate and the third baffle plate will not be adhered to the inner wall of the spray barrel after the attached paint dries, so as to facilitate the next normal use of the spray barrel.

[0008] The above purpose is achieved through the following technical solutions:

[0009] A furniture painting device is used for painting the surface of furniture, comprising a spray gun, a nozzle, a paint cup and a main air pipe, and also comprising:

[0010] The spray barrel is used to determine the spraying position of the paint atomization area formed by the nozzle and adjust the final spraying shape of the atomized paint according to the width and position of the spraying area on the furniture; the spray barrel comprises a round sleeve mounted on the nozzle atomization cap, the round sleeve is connected to a square cylinder through a No. 1 horn, the square cylinder is connected to a conical cylinder through a No. 2 horn, four visual sensors distributed at 90 degree intervals in the circumferential direction are arranged on the end surface of the conical cylinder, an adjustment component is arranged in the square cylinder, and the adjustment component comprises two opposing No. 1 baffles and two opposing ladders. The two baffle plates No. 1 are hinged on the left and right inner wall surfaces of the square tube respectively, the movable end of the baffle plate No. 1 is located on the rear side of its hinged end, the two baffle plates No. 2 are hinged on the upper and lower inner wall surfaces of the square tube respectively, the trapezoidal bottom edge of the baffle plate No. 2 is the hinged end, the movable end of the baffle plate No. 2 is located on the rear side of its hinged end, two baffle plates No. 3 are slidably arranged in the slide grooves on the two waist edges of the baffle plate No. 2 and abut against the plate surface of the baffle plate No. 1, and two leaf springs are connected between the baffle plate No. 3 and the inner wall of the slide groove so that no gap is generated between the baffle plate No. 3 and the baffle plate No. 1.

[0011] The outer side of the square tube is provided with a No. 1 driving structure for driving the No. 1 baffle plate to swing and a No. 2 driving structure for driving the No. 2 baffle plate to swing. The No. 1 baffle plate, the No. 2 baffle plate and the wall of the square tube are provided with a recovery structure for recovering the atomized paint blocked by the No. 1 baffle plate and the No. 2 baffle plate into the paint cup.

[0012] Since the No. 1 and No. 2 baffles in the square tube are at a greater distance from the nozzle, the final spray shape of the atomized paint after being shielded by the No. 1 or No. 2 baffle on the furniture spray surface is similar to the middle shape of the atomized area between the No. 1 or No. 2 baffles.

[0013] In one embodiment, the No. 1 driving structure includes a No. 1 rotating shaft, which is installed on the outside of the square cylinder. Two No. 2 gears are installed at both ends of the No. 1 rotating shaft, and the two No. 2 gears are respectively meshed with the No. 1 gears on the No. 1 rotating pins of the two No. 1 baffles. A No. 1 worm wheel is installed on the No. 1 rotating shaft, and the No. 1 worm wheel is meshed with a No. 1 worm mounted on the outside of the square cylinder. The No. 1 worm is connected to the output shaft of the No. 1 motor installed on the outside of the square cylinder.

[0014] In one embodiment, the No. 2 driving structure includes a No. 2 rotating shaft, which is installed on the outside of the square tube. Two No. 4 gears are installed at both ends of the No. 2 rotating shaft. The two No. 4 gears are respectively meshed with the No. 3 gear on the No. 2 rotating pins of the two No. 2 baffles. A No. 2 worm wheel is installed on the No. 2 rotating shaft, and the No. 2 worm wheel is meshed with the No. 2 worm mounted on the outside of the square tube. The No. 2 worm is connected to the output shaft of the No. 2 motor installed on the outside of the square tube.

[0015] In one embodiment, the hinged ends of the first baffle plate and the second baffle plate are both rotatably disposed in the rotation groove of the inner wall of the square tube, and the hinged ends of the first baffle plate and the second baffle plate are provided with sealing gaskets that cooperate with the corresponding rotation groove seals.

[0016] In one of the embodiments, the upper and lower ends of the first baffle are provided with sealing gaskets that are sealed with the upper and lower inner wall surfaces of the square tube.

[0017] In one of the embodiments, a sealing gasket is provided at the side end of the third baffle plate to seal with the plate surface of the corresponding side first baffle plate.

[0018] In one embodiment, the main air pipe is installed at the air inlet of the spray gun through a three-way valve.

[0019] In one embodiment, the recovery structure includes four recovery shells and a No. 2 bronchus, the four recovery shells are respectively arranged at the recovery ports on the four outer walls of the square tube, the bell mouths on the recovery shells are connected to the recovery ports, the recovery ports are opposite to the No. 1 baffle or the No. 2 baffle on the corresponding side, the recovery shell has an arc surface opposite to the bell mouth, the middle of the arc surface is provided with a negative pressure port opposite to the bell mouth, a filter membrane is arranged in the negative pressure port, an airway is arranged at the negative pressure port, and the airway is connected to the No. 2 negative pressure pipe on the negative pressure pump through the No. 1 negative pressure pipe, A liquid cavity and a liquid channel are respectively provided at both ends of the arc surface. A liquid inlet and a plurality of liquid discharge holes tangent to the arc surface are opened on the wall surface of the liquid cavity. The liquid inlet is connected with a No. 2 liquid delivery pipe through a No. 1 liquid delivery pipe, the No. 2 liquid delivery pipe is connected with a paint cup, and a No. 1 oil pump is provided on the No. 2 liquid delivery pipe. The liquid channel is connected with a No. 2 recovery pipe through a No. 1 recovery pipe, the No. 2 recovery pipe is connected with the paint cup, and a No. 2 oil pump is provided on the No. 2 recovery pipe. A guide plate is provided on the inner wall on one side of the bell mouth to guide the high-pressure gas entering the recovery shell through the bell mouth to the negative pressure port.

[0020] The No. 2 bronchus connects the second air outlet of the three-way valve with the four No. 1 bronchus, and the four No. 1 bronchus respectively pass through the wall of a horn and are connected with the No. 1 air inlet on the wall of the No. 1 air cavity at the movable end of the No. 1 baffle or the No. 2 air inlet on the wall of the No. 2 air cavity at the movable end of the No. 2 baffle. A number of No. 1 exhaust holes tangent to the outer surface of the No. 1 baffle are provided on the wall of the No. 1 air cavity, and a number of No. 2 exhaust holes tangent to the outer surface of the No. 2 baffle are provided on the wall of the No. 2 air cavity.

[0021] In one embodiment, the four inner walls of the square tube are provided with No. 2 receiving grooves which cooperate with the No. 1 air cavity at the movable end of the No. 1 baffle or the No. 2 air cavity at the movable end of the No. 2 baffle, and the inner wall of the No. 1 horn tube is provided with four No. 1 receiving grooves which are evenly distributed axially and correspond one-to-one with the No. 1 bronchus, the No. 1 bronchus is connected with the No. 1 annular tube, the No. 1 annular tube is connected with the No. 2 bronchus, the No. 1 negative pressure tube is connected with the No. 2 annular tube, the No. 2 annular tube is connected with the No. 2 negative pressure tube, the No. 1 liquid delivery tube is connected with the No. 3 annular tube, the No. 3 annular tube is connected with the No. 2 liquid delivery tube, the No. 1 recovery tube is connected with the No. 4 annular tube, and the No. 4 annular tube is connected with the No. 2 recovery tube.

[0022] The painting method is as follows:

[0023] The spraying distance between the nozzle and the furniture surface is 30 cm.

[0024] When it is necessary to spray paint on a large surface area of ​​furniture, keep the two No. 1 baffles and the two No. 2 baffles close to the inner wall of the square tube, so that the conical atomization area sprayed by the nozzle can be sprayed through the spray tube unobstructed for normal spraying.

[0025] When it is necessary to spray paint on the edge of furniture or the surface whose width is smaller than the diameter of the final spraying area of ​​the conical atomization area, the four visual sensors on the end face of the conical cylinder at the front end of the spray tube will determine the edge orientation, and control the No. 1 baffle or No. 2 baffle on the corresponding side to swing toward the middle of the square cylinder by a certain amplitude through the control system, so as to partially block the conical atomization area formed by the nozzle spraying, so that the final spray shape of the atomized paint on the spraying surface is an incomplete circle with one straight edge or two relatively straight edges, so that the straight edge of the incomplete circle is just flush with the edge of the furniture for spraying, thereby ensuring that the atomized paint is evenly and effectively sprayed on the edge of the furniture and will not fly away and be wasted due to some areas not being blocked.

[0026] When it is necessary to spray the right-angled edge of the spraying surface on the furniture or the rectangular surface whose side length is smaller than the diameter of the final spraying area of ​​the conical atomization area, the four visual sensors on the end face of the conical cylinder at the front end of the spray tube will judge the edge position of the spraying surface, and control the two No. 1 baffles and the two No. 2 baffles to swing toward the middle of the square cylinder by a certain amplitude through the control system, so as to partially block the conical atomization area formed by the nozzle, so that the spraying area finally formed by the atomized paint on the spraying surface is a rectangle whose side length is smaller than the edge size of the spraying surface, so that the edge of the rectangular spraying area finally formed by the atomized area is just flush with the edge of the furniture for spraying, thereby ensuring that the atomized paint will not fly away and be wasted due to some areas not being blocked while being evenly and effectively sprayed on the right-angled edge of the furniture or the rectangular surface whose side length is smaller than the diameter of the final spraying area of ​​the conical atomization area.

[0027] During the spraying process on the edge of furniture or the surface whose width is smaller than the diameter of the final spraying area of ​​the conical atomization area, or the right-angle edge of the spraying surface of furniture or the rectangular surface whose side length is smaller than the diameter of the final spraying area of ​​the conical atomization area, the atomized paint blocked by the No. 1 baffle or the No. 2 baffle is promptly recovered into the paint cup through the recovery shell on the corresponding side.

[0028] The beneficial effects of the present invention are as follows:

[0029] 1. The cone at the end of the spray barrel in the present invention is convenient for the operator to observe the spraying position and determine the spraying area on the spraying surface to be sprayed because the cone area of ​​the atomized paint sprayed by the nozzle is located in the middle of the cone, thereby improving the spraying efficiency.

[0030] 2. In the square tube of the spray gun in the present invention, the two No. 1 baffles, the two No. 2 baffles and the two No. 3 baffles on each No. 2 baffle can adjust the atomization area of ​​the paint sprayed by the nozzle according to the width of the sprayed surface, so that the spraying area finally formed by the atomization area of ​​the paint sprayed by the nozzle on the spraying surface can basically match the surface of the spraying surface and be basically completely blocked by the spraying surface, and the paint will not fly away due to not being blocked by the spraying surface, thereby avoiding pollution to the environment and waste of paint after the paint flies away.

[0031] 3. In the present invention, the outer side of the spray barrel, the No. 1 baffle and the No. 2 baffle are provided with a structure for timely recovering the liquid paint blocked by the No. 1 baffle, the No. 2 baffle and the No. 3 baffle, so that the paint sprayed from the nozzle will basically not adhere to the No. 1 baffle, the No. 2 baffle or the No. 3 baffle due to being partially blocked by the No. 1 baffle, the No. 2 baffle or the No. 3 baffle, and the No. 1 baffle, the No. 2 baffle and the No. 3 baffle are kept basically clean, avoiding the waste of paint while ensuring that the No. 1 baffle, the No. 2 baffle and the No. 3 baffle will not be bonded to the inner wall of the spray barrel after the attached paint dries, so as to facilitate the next normal use of the spray barrel. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is an overall schematic diagram of the present invention;

[0033] Figure 2 is an overall cross-sectional view of the present invention;

[0034] Figure 3 It is a schematic diagram of the outer structure of the spray barrel in the present invention;

[0035] Figure 4 It is a top cross-sectional view of the structure of the spray barrel in the present invention;

[0036] Figure 5 It is a side structural cross-sectional view of the No. 1 baffle on the spray barrel of the present invention;

[0037] Figure 6 It is a side sectional view of the upper structure of the spray barrel in the present invention;

[0038] Figure 7 It is a side structural cross-sectional view of the second baffle on the spray barrel of the present invention;

[0039] Figure 8 These are two distribution diagrams of No. 1 transfer and No. 2 transfer in the present invention;

[0040] Fig. 9 It is a schematic diagram of a No. 1 driving structure for driving two No. 1 baffles on the outer side of the spray barrel in the present invention;

[0041] Fig.10 It is a schematic diagram of a No. 2 driving structure for driving two No. 2 baffles on the outer side of the spray barrel in the present invention;

[0042] Fig.11 It is a cross-sectional view of the cooperation between the No. 1 baffle and the square tube and the No. 3 baffle on the corresponding side of the No. 2 baffle in the present invention;

[0043] Fig.12 It is a cross-sectional view of the cooperation between the second baffle and the rotating groove on the inner wall of the square tube in the present invention;

[0044] Fig.13 It is a cross-sectional view of the cooperation between the first baffle plate and the rotating groove on the inner wall of the square tube in the present invention;

[0045] Fig.14 It is a top cross-sectional view of the cooperation between two No. 3 baffles and two No. 1 baffles in the No. 2 baffle of the present invention;

[0046] Fig.15 It is a spray barrel and a cross-sectional view thereof in the present invention;

[0047] Fig.16 It is a baffle No. 1 in the present invention and a cross-sectional view thereof;

[0048] Fig.17 are two schematic diagrams of the structure on the second baffle in the present invention;

[0049] Fig.18 are two cross-sectional views of the structure on the second baffle in the present invention;

[0050] Fig.19 are two schematic diagrams of the second baffle in the present invention;

[0051] Fig. 20 It is a schematic diagram of the structure on the recovery shell in the present invention;

[0052] Fig.21 It is a cross-sectional view of the structure on the recovery shell in the present invention;

[0053] Fig. 22 It is a schematic diagram of the connection mode between the No. 1 bronchus and the No. 2 bronchus in the present invention;

[0054] Fig.23 It is a schematic diagram of the connection method of the No. 1 negative pressure pipe and the No. 2 negative pressure pipe in the present invention;

[0055] Fig.24 It is a schematic diagram of the connection method of the No. 1 liquid delivery pipe and the No. 2 liquid delivery pipe in the present invention;

[0056] Fig.25 It is a schematic diagram of the connection method between the No. 1 recovery pipe and the No. 2 recovery pipe in the present invention;

[0057] Fig.26 It is a schematic diagram of the spraying area after the two No. 1 baffles are adjusted in the present invention;

[0058] Fig. 27 It is a schematic diagram of the spraying area after the two No. 2 baffles are adjusted in the present invention;

[0059] Fig.28 Schematic diagram of the spraying area after two No. 1 baffles and two No. 2 baffles are adjusted together in the present invention;

[0060] Fig.29 It is the regulation state diagram of the present invention;

[0061] Fig.30It is a schematic diagram of spraying the surface of a table leg or frame structure with a spray gun in the prior art;

[0062] Name of the label in the figure:

[0063] 101, spray gun; 102, paint cup; 103, No. 1 oil pump; 104, No. 2 oil pump; 105, three-way valve; 106, main air pipe; 107, nozzle;

[0064] 200, spray gun; 201, round sleeve; 202, trumpet No. 1; 203, receiving tank No. 1; 204, square cylinder; 205, recovery port; 206, receiving tank No. 2; 207, rotating trough; 208, trumpet No. 2; 209, conical cylinder;

[0065] 300, adjustment assembly; 301, baffle plate No. 1; 302, air cavity No. 1; 303, exhaust hole No. 1; 304, air inlet No. 1; 305, rotating pin No. 1; 306, sealing gasket; 307, gear No. 1; 308, gear No. 2; 309, rotating shaft No. 1; 310, worm gear No. 1; 311, worm gear No. 1; 312, motor No. 1; 313, baffle plate No. 2; 314, slide; 315, air cavity No. 2; 316, exhaust hole No. 2; 317, air inlet No. 2; 318, rotating pin No. 2; 319, baffle plate No. 3; 320, leaf spring; 321, gear No. 3; 322, gear No. 4; 323, rotating shaft No. 2; 324, worm gear No. 2; 32 5. Worm gear No. 2; 326. Motor No. 2; 327. Recovery shell; 328. Bell mouth; 329. Arc surface; 330. Negative pressure port; 331. Air filter membrane; 332. Airway; 333. Liquid channel; 334. Liquid cavity; 335. Drain hole; 336. Liquid inlet; 337. Guide plate; 338. Bronchus No. 1; 339. Ring tube No. 1; 340. Bronchus No. 2; 341. Negative pressure tube No. 1; 342. Ring tube No. 2; 343. Negative pressure tube No. 2; 344. Liquid delivery tube No. 1; 345. Ring tube No. 3; 346. Liquid delivery tube No. 2; 347. Recovery tube No. 1; 348. Ring tube No. 4; 349. Recovery tube No. 2; 350. Visual sensor. DETAILED DESCRIPTION

[0066] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0067] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings). In the description of the present invention, it should be understood that the orientation or position relationship indicated by the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. are based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0068] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0069] like Figure 1-25 As shown, a furniture painting device is used to paint the surface of furniture, including a spray gun 101, a nozzle 107, a paint cup 102 and a main air pipe 106, and also includes:

[0070] The spray barrel 200 is used to determine the spraying position of the paint atomization area formed by the nozzle 107 and adjust the final spraying shape of the atomized paint according to the width and position of the spraying area on the furniture; the spray barrel 200 includes a round sleeve 201 mounted on the atomizing cap of the nozzle 107, the round sleeve 201 is connected to a square cylinder 204 through a No. 1 horn 202, the square cylinder 204 is connected to a conical cylinder 209 through a No. 2 horn 208, and four visual sensors 350 are arranged on the end surface of the conical cylinder 209 at intervals of 90 degrees in the circumferential direction, and an adjustment component 300 is arranged in the square cylinder 204, and the adjustment component 300 includes two opposing No. 1 baffles 301 and two opposing No. 1 baffles 301. The trapezoidal No. 2 baffle plate 313, the two No. 1 baffle plates 301 are respectively hinged on the left and right inner wall surfaces of the square tube 204, the movable end of the No. 1 baffle plate 301 is located at the rear side of its hinged end, the two No. 2 baffle plates 313 are respectively hinged on the upper and lower inner wall surfaces of the square tube 204, the trapezoidal bottom edge of the No. 2 baffle plate 313 is the hinged end, the movable end of the No. 2 baffle plate 313 is located at the rear side of its hinged end, and two No. 3 baffle plates 319 that are against the plate surface of the No. 1 baffle plate 301 are slidably arranged in the slide groove 314 on the two waist edges of the No. 2 baffle plate 313, and two leaf springs 320 are connected between the No. 3 baffle plate 319 and the inner wall of the slide groove 314 so that there is no gap between it and the No. 1 baffle plate 301.

[0071] The outer side of the square tube 204 is provided with a No. 1 driving structure for driving the No. 1 baffle 301 to swing and a No. 2 driving structure for driving the No. 2 baffle 313 to swing. The No. 1 baffle 301, the No. 2 baffle 313 and the wall of the square tube 204 have a recovery structure for recovering the atomized paint blocked by the No. 1 baffle 301 and the No. 2 baffle 313 into the paint cup 102.

[0072] In the present invention, the cone 209 at the end of the spray tube 200 is convenient for the operator to observe the spraying position and determine the spraying area on the spraying surface to be sprayed, thereby improving the spraying efficiency because the cone area of ​​the atomized paint sprayed by the nozzle 107 is located in the middle of the cone 209.

[0073] In the present invention, the two No. 1 baffles 301, the two No. 2 baffles 313 and the two No. 3 baffles 319 on each No. 2 baffle 313 in the square tube 204 of the spray tube 200 can adjust the paint atomization area sprayed by the nozzle 107 according to the width of the sprayed surface, so that the spraying area finally formed by the paint atomization area sprayed by the nozzle 107 on the spraying surface can basically match the surface of the spraying surface and be basically completely blocked by the spraying surface, and the paint will not fly away due to not being blocked by the spraying surface, thereby avoiding pollution to the environment and waste of paint after the paint flies away.

[0074] In the present invention, the outer side of the spray barrel 200, the first baffle 301 and the second baffle 313 are provided with a structure for timely recovering the liquid paint blocked by the first baffle 301, the second baffle 313 and the third baffle 319, so that the paint sprayed from the oil nozzle will basically not adhere to the first baffle 301, the second baffle 313 or the third baffle 319 due to being partially blocked by the first baffle 301, the second baffle 313 or the third baffle 319, and the first baffle 301, the second baffle 313 and the third baffle 319 are kept basically clean, avoiding the waste of paint while ensuring that the first baffle 301, the second baffle 313 and the third baffle 319 will not be bonded to the inner wall of the spray barrel 200 after the attached paint dries, so as to facilitate the next normal use of the spray barrel 200.

[0075] In a further embodiment, Fig. 9 As shown, the No. 1 driving structure includes a No. 1 rotating shaft 309, which is installed on the outside of the square tube 204. Two No. 2 gears 308 are installed at both ends of the No. 1 rotating shaft 309. The two No. 2 gears 308 are respectively meshed with the No. 1 gear 307 on the No. 1 rotating pin 305 of the two No. 1 baffles 301. A No. 1 worm gear 310 is installed on the No. 1 rotating shaft 309, and the No. 1 worm gear 310 is meshed with a No. 1 worm 311 installed on the outside of the square tube 204. The No. 1 worm 311 is connected to the output shaft of a No. 1 motor 312 installed on the outside of the square tube 204.

[0076] In a further embodiment, Fig.10 As shown, the second drive structure includes a second rotating shaft 323, the second rotating shaft 323 is installed on the outside of the square tube 204, two fourth gears 322 are installed at both ends of the second rotating shaft 323, the two fourth gears 322 are respectively meshed with the third gear 321 on the second rotating pin 318 of the two second baffles 313, and a second worm wheel 324 is installed on the second rotating shaft 323, the second worm wheel 324 is meshed with the second worm 325 installed on the outside of the square tube 204, and the second worm 325 is connected to the output shaft of the second motor 326 installed on the outside of the square tube 204. Both sets of worm wheels and worms are self-locking worm wheels, which can be self-locked and cannot rotate when the worm is not driven.

[0077] In a further embodiment, Fig.12 , 13 As shown, the hinged ends of the first baffle plate 301 and the second baffle plate 313 are both rotatably disposed in the rotation groove 207 of the inner wall of the square tube 204 , and the hinged ends of the first baffle plate 301 and the second baffle plate 313 are provided with sealing gaskets 306 that are sealed with the corresponding rotation grooves 207 .

[0078] In a further embodiment, Fig.11 , 16As shown, the upper and lower ends of the first baffle 301 are provided with sealing gaskets 306 that are sealed with the upper and lower inner wall surfaces of the square tube 204 .

[0079] In a further embodiment, Fig.11 , 14 As shown in Figures 17, the side end of the third baffle plate 319 is provided with a sealing gasket 306 which is sealed with the plate surface of the first baffle plate 301 on the corresponding side.

[0080] In a further embodiment, Figure 1 , 2 As shown, the main air pipe 106 is installed at the air inlet of the spray gun 101 through a three-way valve 105.

[0081] In a further embodiment, Figure 3 , 7 , 15, 16, 18, 20, and 21, the recovery structure includes four recovery shells 327 and a No. 2 bronchus 340, the four recovery shells 327 are respectively arranged at the recovery port 205 on the four outer walls of the square tube 204, the bell mouth 328 on the recovery shell 327 is connected to the recovery port 205, the recovery port 205 is opposite to the No. 1 baffle 301 or the No. 2 baffle 313 on the corresponding side, the recovery shell 327 has an arc surface 329 opposite to the bell mouth 328, the middle part of the arc surface 329 is provided with a negative pressure port 330 opposite to the bell mouth 328, the negative pressure port 330 is provided with a gas filter membrane 331, the negative pressure port 330 is provided with an airway 332, the airway 332 is connected to the No. 2 negative pressure pipe 343 on the negative pressure pump through the No. 1 negative pressure pipe 341 The two ends of the arc surface 329 are respectively provided with a liquid cavity 334 and a liquid channel 333. A liquid inlet 336 and a plurality of liquid discharge holes 335 tangent to the arc surface 329 are provided on the wall of the liquid cavity 334. The liquid inlet 336 is connected with a No. 2 liquid delivery pipe 346 through a No. 1 liquid delivery pipe 344. The No. 2 liquid delivery pipe 346 is connected with the paint cup 102. The No. 1 oil pump 103 is arranged on the No. 2 liquid delivery pipe 346. The liquid channel 333 is connected with a No. 2 recovery pipe 349 through a No. 1 recovery pipe 347. The No. 2 recovery pipe 349 is connected with the paint cup 102. The No. 2 recovery pipe is provided with a No. 2 oil pump 104. A guide plate 337 is provided on the inner wall of one side of the bell mouth 328 for guiding the high-pressure gas entering the recovery shell 327 through the bell mouth 328 to the negative pressure port 330.

[0082] The No. 2 bronchus 340 connects the second air outlet of the three-way valve 105 with the four No. 1 bronchus 338, and the four No. 1 bronchus 338 respectively pass through the wall of a horn and are connected with the No. 1 air inlet 304 on the wall of the No. 1 air cavity 302 at the movable end of the No. 1 baffle 301 or the No. 2 air inlet 317 on the wall of the No. 2 air cavity 315 at the movable end of the No. 2 baffle 313. A number of No. 1 exhaust holes 303 tangent to the outer plate surface of the No. 1 baffle 301 are opened on the wall of the No. 1 air cavity 302, and a number of No. 2 exhaust holes 316 tangent to the outer plate surface of the No. 2 baffle 313 are opened on the wall of the No. 2 air cavity 315.

[0083] In a further embodiment, Figure 5 , 7 As shown in Figures 12 and 15, the four inner walls of the square tube 204 are provided with No. 2 receiving grooves 206 which cooperate with the No. 1 air cavity 302 at the movable end of the No. 1 baffle 301 or the No. 2 air cavity 315 at the movable end of the No. 2 baffle 313. The inner wall of the No. 1 horn tube 328 is provided with four No. 1 receiving grooves 203 which are evenly distributed in the axial direction and correspond to the No. 1 bronchus 338 in one-to-one correspondence. The No. 1 bronchus 338 is connected to the No. 1 annular tube 339. The No. 1 annular tube 339 is connected to the No. 2 bronchial tube 340, the No. 1 negative pressure tube 341 is connected to the No. 2 annular tube 342, the No. 2 annular tube 342 is connected to the No. 2 negative pressure tube 343, the No. 1 liquid delivery tube 344 is connected to the No. 3 annular tube 345, the No. 3 annular tube 345 is connected to the No. 2 liquid delivery tube 346, the No. 1 recovery tube 347 is connected to the No. 4 annular tube 348, and the No. 4 annular tube 348 is connected to the No. 2 recovery tube 349.

[0084] like Fig.26 , 27 , 28, and 29, the painting method is as follows:

[0085] The spraying distance between the nozzle 107 and the furniture surface is 30 cm.

[0086] When a large area of ​​furniture needs to be sprayed with paint, the two No. 1 baffles 301 and the two No. 2 baffles 313 are kept in close contact with the inner wall of the square tube 204, so that the conical atomization area sprayed by the nozzle 107 can be sprayed through the spray tube 200 without obstruction for normal spraying.

[0087] When it is necessary to spray paint on the edge of furniture or the surface whose width is smaller than the diameter of the final spraying area of ​​the conical atomization area, the four visual sensors 350 on the end face of the conical cylinder 209 at the front end of the spray gun 200 will judge the edge orientation, and control the No. 1 motor 312 to drive the two No. 1 baffles 301 or control the No. 2 motor 326 to drive the two No. 2 baffles 313 to swing toward the middle of the square cylinder 204 by a certain amplitude through the control system, so as to partially block the conical atomization area formed by the nozzle 107, so that the spray shape formed by the atomized paint on the spraying surface is an incomplete circle with one straight edge or two relatively straight edges, so that the straight edge of the incomplete circle is just flush with the edge of the furniture for spraying, thereby ensuring that the atomized paint will not fly away and be wasted due to some areas not being blocked while spraying the edge of the furniture evenly and effectively.

[0088] When it is necessary to spray the right-angle edge of the spraying surface on the furniture or the rectangular surface whose side length is smaller than the diameter of the final spraying area of ​​the conical atomization area, the four visual sensors 350 on the end face of the cone cylinder 209 at the front end of the spray cylinder 200 will judge the edge position of the spraying surface, and control the No. 1 motor 312 and the No. 2 motor 326 to run simultaneously, and the No. 1 motor 312 drives the two No. 1 baffles 301 to swing toward the middle of the square cylinder 204 by a certain amplitude, and at the same time, the No. 2 motor 326 drives the two No. 2 baffles 313 to swing toward the middle of the square cylinder 204 by a certain amplitude, and the two No. 1 baffles 301 and the two No. 2 baffles 313 and The third baffle plate 319 on the second baffle plate 313 forms a rectangular outlet with a side length smaller than the diameter of the conical atomization area, thereby partially blocking the conical atomization area formed by the nozzle 107, so that the spraying area finally formed by the atomized paint on the spraying surface is a rectangle with a side length smaller than the edge size of the spraying surface, so that the edge of the rectangular spraying area finally formed by the atomized area is just flush with the edge of the furniture for spraying, thereby ensuring that the atomized paint is evenly and effectively sprayed on the right-angled side of the furniture or the rectangular surface with a side length smaller than the diameter of the final spraying area of ​​the conical atomization area, and will not fly away and be wasted due to some areas not being blocked.

[0089] When the No. 1 baffle 301 and the No. 2 baffle 313 swing simultaneously, the two No. 3 baffles 319 on both sides of each No. 2 baffle 313 will shrink into the slide groove 314 of the No. 2 baffle 313 under the action of the No. 1 baffle 301 and compress the leaf spring 320 to store energy, ensuring that the No. 3 baffle 319 always maintains a sealed contact with the No. 1 baffle 301 without any gap when the No. 2 baffle 313 drives the No. 3 baffle 319 to swing, thereby ensuring that the No. 1 baffle 301 After swinging, the second baffle 313 and the third baffle 319 effectively shield the four sides of the conical atomization area, so that the paint atomization area finally forms a rectangular spraying area on the furniture surface after adjustment by the first baffle 301, the second baffle 313 and the third baffle 319, so as to facilitate the spraying of the right-angled edges of the furniture surface and the spraying surface whose width is smaller than the diameter of the cylindrical paint atomization area without wasting paint, and at the same time, protect the environment from being polluted by omitted paint.

[0090] Since the No. 1 baffle 301 and the No. 2 baffle 313 in the square tube 204 are at a greater distance from the nozzle 107 , the final spray shape of the atomized paint after being shielded by the No. 1 baffle 301 or the No. 2 baffle 313 on the furniture spray surface is similar to the middle shape of the atomized area between the No. 1 baffle 301 or the No. 2 baffle 313 .

[0091] During the spraying process on the edge of furniture or the surface whose width is smaller than the diameter of the final spraying area of ​​the conical atomization area, or the right-angle edge of the spraying surface of furniture or the rectangular surface whose side length is smaller than the diameter of the final spraying area of ​​the conical atomization area, the atomized paint blocked by the first baffle 301 or the second baffle 313 is promptly recovered into the paint cup 102 through the recovery shell 327 on the corresponding side.

[0092] In the process of spraying the edge of furniture or the surface whose width is smaller than the final spraying area diameter of the conical atomization area, or the right-angle edge of the spraying surface of furniture or the rectangular surface whose side length is smaller than the final spraying area diameter of the conical atomization area, the high-pressure air in the main air pipe 106 enters the No. 1 air cavity 302 on the No. 1 baffle 301 and the No. 2 air cavity 315 on the No. 2 baffle 313 through the three-way valve 105, the No. 2 bronchial pipe 340, the No. 1 annular pipe 339 and the four No. 1 bronchial pipes 338, and the high-pressure air entering the No. 1 air cavity 302 is discharged through the No. 1 exhaust hole 334. 03 blows out and blows the atomized paint blocked by the No. 1 baffle 301 to the recovery port 205 on the corresponding inner wall of the square tube 204 to prevent the paint from adhering to the outside of the No. 1 baffle 301. The high-pressure air in the No. 2 air cavity 315 blows out through the No. 2 exhaust hole 316 and blows the atomized paint blocked by the No. 2 baffle 313 to the recovery port 205 on the corresponding inner wall of the square tube 204 to prevent the paint from adhering to the outside of the No. 2 baffle 313. At the same time, the negative pressure pump is respectively connected to the No. 2 negative pressure pipe 343, the No. 2 annular pipe 342 and the four No. 1 negative pressure pipes 341. Negative pressure is formed at the negative pressure ports 330 of the four recovery shells 327. The recovery shell 327 at the recovery port 205 will reach the recovery port 205 and the high-pressure air carrying the atomized paint will be sucked in through the bell mouth 328 due to the negative pressure generated by the negative pressure port 330. The high-pressure air carrying the atomized paint entering the recovery shell 327 is filtered by the air filter membrane 331 and reaches the negative pressure pump. The paint filtered out of the high-pressure air adheres to the arc surface 329. At the same time, the paint in the paint cup 102 is pumped through the No. 2 liquid delivery pipe 346 and the No. 3 ring pipe 345 under the action of the No. 1 oil pump 103. The paint is respectively delivered to the liquid chambers 334 of the four recovery shells 327 in the form of high pressure through the four No. 1 liquid delivery pipes 344. Since the arc surface 329 is a smooth surface, the high-pressure paint entering the liquid chamber 334 is discharged into the recovery shell 327 through the drainage hole 335 on the wall and, under the guidance of the arc surface 329, carries the paint filtered by the air filter membrane 331 into the No. 1 recovery pipe 347 through the liquid channel 333. The paint entering the No. 1 recovery pipe 347 is recovered into the paint cup 102 through the No. 4 ring pipe 348 and the No. 2 recovery pipe 349 under the action of the No. 2 oil pump 104.

Claims

1. A furniture painting equipment, used for painting the surface of furniture, comprising a spray gun, a nozzle, a paint cup and a main air pipe, characterized in that: Also includes: The spray barrel is used to determine the spraying position of the paint atomization area formed by the nozzle and adjust the final spraying shape of the atomized paint according to the width and position of the spraying area on the furniture; the spray barrel comprises a round sleeve mounted on the nozzle atomization cap, the round sleeve is connected to a square cylinder through a No. 1 horn, the square cylinder is connected to a conical cylinder through a No. 2 horn, four visual sensors distributed at 90 degree intervals in the circumferential direction are arranged on the end surface of the conical cylinder, an adjustment component is arranged in the square cylinder, and the adjustment component comprises two opposing No. 1 baffles and two opposing ladders. The two No. 1 baffles are respectively hinged on the left and right inner wall surfaces of the square tube, the movable end of the No. 1 baffle is located at the rear side of its hinged end, and the two No. 2 baffles are respectively hinged on the upper and lower inner wall surfaces of the square tube, the trapezoidal bottom edge of the No. 2 baffle is the hinged end, and the movable end of the No. 2 baffle is located at the rear side of its hinged end, and two No. 3 baffles that are against the plate surface of the No. 1 baffle are slidably arranged in the slide grooves on the two waist edges of the No. 2 baffle, and two leaf springs are connected between the No. 3 baffle and the inner wall of the slide groove so that there is no gap between the No. 3 baffle and the No. 1 baffle; The outer side of the square tube is provided with a No. 1 driving structure for driving the No. 1 baffle plate to swing and a No. 2 driving structure for driving the No. 2 baffle plate to swing. The No. 1 baffle plate, the No. 2 baffle plate and the wall of the square tube are provided with a recovery structure for recovering the atomized paint blocked by the No. 1 baffle plate and the No. 2 baffle plate into the paint cup; The main air pipe is installed at the air inlet of the spray gun through a three-way valve; The recovery structure includes four recovery shells and a No. 2 bronchus. The four recovery shells are respectively arranged at the recovery ports on the four outer walls of the square tube. The bell mouths on the recovery shells are connected to the recovery ports. The recovery ports are opposite to the No. 1 baffle plate or the No. 2 baffle plate on the corresponding side. The recovery shell has an arc surface opposite to the bell mouth. A negative pressure port opposite to the bell mouth is opened in the middle of the arc surface. A filter membrane is arranged in the negative pressure port. An airway is arranged at the negative pressure port. The airway is connected to the No. 2 negative pressure pipe on the negative pressure pump through the No. 1 negative pressure pipe. A liquid cavity and a liquid channel are respectively provided at both ends, a liquid inlet and a plurality of liquid discharge holes tangent to the arc surface are provided on the wall surface of the liquid cavity, the liquid inlet is connected with a No. 2 liquid delivery pipe through a No. 1 liquid delivery pipe, the No. 2 liquid delivery pipe is connected with a paint cup, a No. 1 oil pump is provided on the No. 2 liquid delivery pipe, the liquid channel is connected with a No. 2 recovery pipe through a No. 1 recovery pipe, the No. 2 recovery pipe is connected with a paint cup, a No. 2 oil pump is provided on the No. 2 recovery pipe, and a guide plate for guiding the high-pressure gas entering the recovery shell through the bell mouth to the negative pressure port is provided on the inner wall on one side of the bell mouth; The No. 2 bronchus connects the second air outlet of the three-way valve with the four No. 1 bronchus, and the four No. 1 bronchus respectively pass through the wall of a trumpet and connect with the No. 1 air inlet of the wall of the No. 1 air cavity at the movable end of the No. 1 baffle or the No. 2 air inlet of the wall of the No. 2 air cavity at the movable end of the No. 2 baffle, and a plurality of No. 1 exhaust holes tangent to the outer surface of the No. 1 baffle are provided on the wall of the No. 1 air cavity, and a plurality of No. 2 exhaust holes tangent to the outer surface of the No. 2 baffle are provided on the wall of the No. 2 air cavity; The four inner walls of the square tube are provided with No. 2 receiving grooves which cooperate with the No. 1 air cavity at the movable end of the No. 1 baffle or the No. 2 air cavity at the movable end of the No. 2 baffle. The inner wall of the No. 1 horn tube is provided with four No. 1 receiving grooves which are evenly distributed axially and correspond one to one with the No. 1 bronchus. The No. 1 bronchus is connected with the No. 1 annular tube, which is connected with the No. 2 bronchus, the No. 1 negative pressure tube is connected with the No. 2 annular tube, which is connected with the No. 2 negative pressure tube, the No. 1 liquid delivery tube is connected with the No. 3 annular tube, which is connected with the No. 2 liquid delivery tube, the No. 1 recovery tube is connected with the No. 4 annular tube, which is connected with the No. 2 recovery tube.

2. A furniture painting equipment according to claim 1, characterized in that: The No. 1 driving structure includes a No. 1 rotating shaft, which is installed on the outside of the square cylinder. Two No. 2 gears are installed at both ends of the No. 1 rotating shaft. The two No. 2 gears are respectively meshed with the No. 1 gears on the No. 1 rotating pins of the two No. 1 baffles. A No. 1 worm wheel is installed on the No. 1 rotating shaft, and the No. 1 worm wheel is meshed with a No. 1 worm installed on the outside of the square cylinder. The No. 1 worm is connected to the output shaft of the No. 1 motor installed on the outside of the square cylinder.

3. The furniture painting equipment according to claim 1, characterized in that: The No. 2 driving structure includes a No. 2 rotating shaft, which is installed on the outside of the square tube. Two No. 4 gears are installed at both ends of the No. 2 rotating shaft. The two No. 4 gears are respectively meshed with the No. 3 gear on the No. 2 rotating pins of the two No. 2 baffles. A No. 2 worm wheel is installed on the No. 2 rotating shaft, and the No. 2 worm wheel is meshed with the No. 2 worm installed on the outside of the square tube. The No. 2 worm is connected to the output shaft of the No. 2 motor installed on the outside of the square tube.

4. The furniture painting equipment according to claim 1, characterized in that: The hinged ends of the first baffle plate and the second baffle plate are both rotatably arranged in the rotation groove of the inner wall of the square tube, and the hinged ends of the first baffle plate and the second baffle plate are provided with sealing gaskets that are sealed with the corresponding rotation grooves.

5. The furniture painting equipment according to claim 1, characterized in that: The upper and lower ends of the first baffle are provided with sealing gaskets which are sealed with the upper and lower inner wall surfaces of the square tube.

6. The furniture painting equipment according to claim 1, characterized in that: The side end of the No. 3 baffle is provided with a sealing gasket which is sealed with the plate surface of the No. 1 baffle on the corresponding side.

7. The painting method of furniture painting equipment according to claim 1, characterized in that: The painting method is: The spraying distance between the nozzle and the furniture surface is 30 cm; When it is necessary to spray paint on a large surface of furniture, keep the two No. 1 baffles and the two No. 2 baffles close to the inner wall of the square tube, so that the conical atomization area sprayed by the nozzle can be sprayed through the spray tube without obstruction for normal spraying; When it is necessary to spray paint on the edge of furniture or the surface whose width is smaller than the diameter of the final spraying area of ​​the conical atomization area, the four visual sensors on the end face of the conical cylinder at the front end of the spray cylinder will judge the edge position, and control the No. 1 baffle or No. 2 baffle on the corresponding side to swing a certain amplitude toward the middle of the square cylinder through the control system, so as to partially block the conical atomization area formed by the nozzle spraying, so that the spraying shape of the atomized paint finally formed on the spraying surface is an incomplete circle with one straight edge or two relatively straight edges, so that the straight edge of the incomplete circle is just flush with the edge of the furniture for spraying, thereby ensuring that the atomized paint will not fly away and be wasted due to the partial area not being blocked while spraying the edge of the furniture evenly and effectively; When it is necessary to spray the right-angle edge of the spraying surface of the furniture or the rectangular surface whose side length is smaller than the diameter of the final spraying area of ​​the conical atomization area, the four visual sensors on the end face of the conical cylinder at the front end of the spray cylinder will judge the edge position of the spraying surface, and control the two No. 1 baffles and the two No. 2 baffles to swing toward the middle of the square cylinder by a certain amplitude through the control system, so as to partially block the conical atomization area formed by the nozzle, so that the spraying area finally formed by the atomized paint on the spraying surface is a rectangle whose side length is smaller than the edge size of the spraying surface, so that the edge of the rectangular spraying area finally formed by the atomized area is just flush with the edge of the furniture for spraying, thereby ensuring that the atomized paint will not fly away and be wasted due to some areas not being blocked while spraying the right-angle edge of the furniture or the rectangular surface whose side length is smaller than the diameter of the final spraying area of ​​the conical atomization area evenly and effectively. During the spraying process on the edge of furniture or the surface whose width is smaller than the diameter of the final spraying area of ​​the conical atomization area, or the right-angle edge of the spraying surface on the furniture or the rectangular surface whose side length is smaller than the diameter of the final spraying area of ​​the conical atomization area, the atomized paint blocked by the No. 1 baffle or the No. 2 baffle is promptly recovered into the paint cup through the recovery shell on the corresponding side.

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