Paint spraying device for paint packaging barrel production

Abstract

The invention relates to the technical field of material paint spraying equipment, in particular to a paint spraying device for paint packaging barrel production. The technical problems that due to the fact that manual placement of a packaging barrel is not accurate enough and the packaging barrel is difficult to fix, the packaging barrel is prone to shifting in the paint spraying process, paint spraying is not accurate enough, residual paint is prone to being left in a spray head after paint spraying, the paint flow of paint spraying every time is inconsistent, paint spraying is not uniform enough, and the paint spraying effect is affected are solved. A paint spraying device for paint packaging barrel production comprises a base; the outer frame is fixedly connected to the base; and the motor is mounted on the outer frame. The motor drives the driving mechanism (gear ring removal), the opening mechanism (extrusion ring removal) and the packaging barrel to move in the arc direction, the extrusion ring extrudes the opening frame to enable the supporting frame to extrude the periphery of the inner wall of the packaging barrel, then the packaging barrel is positioned and fixed, follow-up paint spraying is more accurate and stable, and the paint spraying effect is enhanced.

Description

Technical Field

[0001] The present invention relates to the technical field of material spraying equipment, and particularly to a spraying device for the production of paint packaging barrels. Background Art

[0002] During the production of paint packaging barrels, in order to improve the appearance of the barrels and increase their durability and corrosion resistance, a specific paint is usually sprayed on the side surfaces of the packaging barrels. During the spraying process, in order to save paint and ensure a consistent paint thickness, workers usually spray a uniform layer of paint around the side surface of the packaging barrel only once in an environment with a fixed rotation speed and fixed flow rate, and then immediately stop spraying to achieve the purpose of effective spraying.

[0003] Since the manual placement of the packaging barrels is not accurate enough, and the existing spraying devices are not convenient for positioning and fixing the placed packaging barrels during spraying, the packaging barrels are prone to shift during spraying, resulting in inaccurate spraying. In addition, there is often residual paint in the nozzles after spraying, and the existing spraying devices are not convenient for wiping the residual paint in the nozzles clean after each spraying, resulting in inconsistent paint flow rates for each spraying, uneven spraying, and thus affecting the spraying effect. Summary of the Invention

[0004] To overcome the above-mentioned drawbacks, the present invention provides a spraying device for the production of paint packaging barrels, which can position and fix the manually placed packaging barrels before spraying to make the spraying more accurate and stable, and can wipe the residual paint in the nozzles clean after spraying to make the spraying more uniform, thereby enhancing the spraying effect.

[0005] The technical solution is as follows: A spraying device for the production of paint packaging barrels, comprising: A base; An outer frame, fixedly connected to the base; A motor, installed on the outer frame; A driving mechanism, arranged inside the outer frame, on which a packaging barrel is placed; A spreading mechanism, arranged on the driving mechanism; A spraying mechanism, arranged on the driving mechanism.

[0006] Optionally, the driving mechanism includes: a toothed ring, fixedly connected to the top of the inner wall of the outer frame; a rotating arm installed on the output shaft of the motor; a limiting plate fixedly connected to one end of the rotating arm, on which four inclined slots I are evenly opened; a rotating shaft rotatably connected to the limiting plate; a support plate fixedly connected to the upper part of the rotating shaft, on which four inclined slots II are evenly opened, and the packaging barrel is placed on the support plate; a gear fixedly connected to the rotating shaft, on which four inclined slots III are evenly opened, and the gear meshes with the toothed ring.

[0007] Optionally, the four first inclined grooves, the four second inclined grooves, and the four third inclined grooves are vertically correspondingly arranged in sequence.

[0008] Optionally, the expanding mechanism includes: four support frames, which are respectively slidably connected to the four second inclined grooves, and the bottoms of the four support frames are respectively slidably connected to the four third inclined grooves; four first return springs are respectively connected between the mutually approaching ends of the four support frames and the bottom of the rotating shaft; four contact strips are respectively fixed to the bottoms of the four support frames; four expanding frames are respectively slidably connected to the four first inclined grooves, and the outer sides of the tops of the four expanding frames are respectively in contact with the inner sides of the four contact strips; an extrusion ring fixed to the bottom inner wall of the outer frame.

[0009] Optionally, the length of the contact strip is greater than the gap length between the four expanding frames after expansion.

[0010] Optionally, the painting mechanism includes: an extrusion block, which is vertically slidably connected to the side of the limiting plate away from the rotating arm; an extrusion strip fixed to one side of the inner bottom of the outer frame; a slide rail fixed to the inner side wall of the outer frame; a sliding frame slidably connected to the slide rail; two tension springs connected between the sliding frame and one end of the slide rail, both of which are sleeved on the slide rail; a spraying assembly arranged on the sliding frame.

[0011] Optionally, the spraying assembly includes: a right-angle valve installed on the top of the sliding frame, with a right-angle channel and an arc groove opened inside, the right-angle channel and the arc groove are communicated, and one side of the arc groove is communicated with the outside of the right-angle valve; a connecting pipe installed on one side of the right-angle valve and communicated with one side of the right-angle channel, and one end of the connecting pipe is located outside the outer frame; a baffle slidably connected inside the arc groove, and the baffle blocks the flow of the right-angle channel in the arc groove; a rubber block installed at the bottom of the baffle and slidably connected to the chute; a spray pipe installed on the top of the right-angle valve, and the bottom is communicated with the top of the right-angle channel; a plurality of nozzles evenly arranged on one side of the spray pipe.

[0012] Optionally, a cleaning mechanism is further included for wiping the nozzles during reset for cleaning, and is arranged on the slide rail. The cleaning mechanism includes: a pressure-receiving frame slidably connected to the slide rail, and one end of the pressure-receiving frame passes through one side of the sliding frame; two second return springs connected between the pressure-receiving frame and the sliding frame, both of which are sleeved on the slide rail; a fixing plate fixed to the pressure-receiving frame; a wiping strip vertically slidably connected to the fixing plate and in contact with the plurality of nozzles; a limiting ring fixed to the inner side wall of the outer frame, with a wavy groove opened on the limiting ring, and the bottom of the wiping strip is slidably connected to the wavy groove.

[0013] Optionally, the surface of the wiping strip close to the nozzles is made of cloth-like material.

[0014] Beneficial effects: 1. The motor drives the driving mechanism (except the gear ring), the expanding mechanism (except the extrusion ring) and the packaging barrel to move in an arc direction. The extrusion ring squeezes the expanding frame, causing the support frame to squeeze the inner wall of the packaging barrel, thereby positioning and fixing the packaging barrel, making the subsequent painting more accurate and stable, and enhancing the painting effect.

[0015] 2. The movement of the limit plate drives the extrusion block to squeeze the sliding frame to move. The movement of the sliding frame drives the spraying assembly to move along with the packaging barrel. The right-angle valve moves a short distance, causing the baffle to no longer block the right-angle channel. The paint is evenly sprayed on the side surface of the rotating packaging barrel. During the movement of the spray pipe and the nozzle, the entire side surface of the packaging barrel is evenly sprayed with paint. When the spraying is completed, the extrusion strip lifts the extrusion block to disengage from the sliding frame. The tension spring resets to drive the sliding frame and the spraying assembly to reset. The baffle blocks the right-angle channel again, and the paint no longer sprays out. Subsequently, the right-angle valve continues to reset to drive the baffle and the rubber block to reset together. In this way, the painting can be stopped immediately while spraying a full circle of paint on the packaging barrel, making the paint thickness uniform and saving paint waste. The staff only needs to remove the painted packaging barrel and place the packaging barrel to be painted to complete the painting work, which is more convenient for the staff to use and improves the painting efficiency.

[0016] 3. The movement of the extrusion block first squeezes the pressure-bearing frame to move. The movement of the pressure-bearing frame drives the fixed plate and the wiping strip to move together. The wiping strip disengages from the nozzle without affecting the normal use of the nozzle. After the painting is completed, the extrusion block disengages from the sliding frame and the pressure-bearing frame at the same time. The second return spring resets to make the wiping strip reset and contact the nozzle again. The reset of the sliding frame will drive the cleaning mechanism (except the limit ring) to reset through the second return spring. The wave groove of the limit ring squeezes the wiping strip to move up and down reciprocally to continuously wipe the residual paint on the nozzle, preventing the nozzle from being blocked due to the solidification of the residual paint when the painting stops, making the paint flow rate consistent each time, making the painting more uniform, and further enhancing the painting effect on the packaging barrel. Brief Description of the Drawings

[0017] Figure 1 It is a three-dimensional structure diagram of the present invention.

[0018] Figure 2 It is a sectional three-dimensional structure diagram of the present invention.

[0019] Figure 3 It is a partial sectional three-dimensional structure diagram of the present invention.

[0020] Figure 4 It is a partial three-dimensional structure diagram of the present invention.

[0021] Figure 5 For the present invention Figure 3 An enlarged three-dimensional structure diagram of A in it.

[0022] Figure 6 Partial three-dimensional structural schematic diagram of the driving mechanism, expanding mechanism and extrusion block of the present invention.

[0023] Figure 7 Partial three-dimensional structural schematic diagram of the limiting plate, rotating shaft and expanding mechanism of the present invention.

[0024] Figure 8 Partial exploded three-dimensional structural schematic diagram of the driving mechanism and expanding mechanism of the present invention.

[0025] Figure 9 Partial exploded three-dimensional structural schematic diagram of the limiting plate and expanding mechanism of the present invention.

[0026] Figure 10 For the present invention Figure 3 Enlarged three-dimensional structural schematic diagram of B in the present invention.

[0027] Figure 11 Partial sectional three-dimensional structural schematic diagram of the painting mechanism and cleaning mechanism of the present invention.

[0028] Figure 12 Partial three-dimensional structural schematic diagram of the painting mechanism and cleaning mechanism of the present invention.

[0029] Figure 13 Partial exploded three-dimensional structural schematic diagram of the painting mechanism of the present invention.

[0030] Figure 14 Partial sectional three-dimensional structural schematic diagram of the spraying assembly of the present invention.

[0031] Figure 15 Partial sectional exploded three-dimensional structural schematic diagram of the right-angle valve and baffle of the present invention.

[0032] Figure 16 Partial three-dimensional structural schematic diagram of the sliding rack and cleaning mechanism of the present invention.

[0033] Figure 17 Partial exploded three-dimensional structural schematic diagram of the cleaning mechanism of the present invention.

[0034] Description of reference numerals: 1 - base, 2 - outer frame, 3 - motor, 4 - driving mechanism, 41 - gear ring, 42 - swing arm, 43 - limiting plate, 431 - first inclined groove, 44 - rotating shaft, 45 - support plate, 451 - second inclined groove, 46 - gear, 461 - third inclined groove, 5 - expanding mechanism, 51 - support frame, 52 - first return spring, 53 - contact strip, 54 - expanding frame, 55 - extrusion ring, 6 - painting mechanism, 61 - extrusion block, 62 - extrusion strip, 63 - slide rail, 64 - sliding frame, 65 - tension spring, 66 - spraying assembly, 661 - right-angle valve, 6611 - right-angle channel, 6612 - arc groove, 662 - connecting pipe, 663 - baffle, 664 - rubber block, 665 - spray pipe, 666 - nozzle, 7 - cleaning mechanism, 71 - pressure-bearing frame, 72 - second return spring, 73 - fixing plate, 74 - wiping strip, 75 - limiting ring, 751 - wavy groove. Detailed implementation manners

[0035] The present invention will be further described below in conjunction with the accompanying drawings and specific implementation manners.

[0036] Example 1: A painting device for the production of paint packaging barrels, as Figures 1 - 15 shown, comprising: Base 1; Outer frame 2, welded to the base 1; Motor 3, installed on the outer frame 2; Driving mechanism 4, arranged inside the outer frame 2, on which a packaging barrel is placed, and the driving mechanism 4 is used to drive the packaging barrel to move and rotate; Expanding mechanism 5, used to limit and fix the packaging barrel in an expanded form, arranged on the driving mechanism 4; Painting mechanism 6, used to spray paint for one week on the outside following the rotation of the packaging barrel, arranged on the driving mechanism 4.

[0037] The driving mechanism 4 includes: a gear ring 41, installed on the top of the inner wall of the outer frame 2; a swing arm 42 installed on the output shaft of the motor 3, located inside the outer frame 2; a limiting plate 43 welded to one end of the swing arm 42, on which four first inclined grooves 431 are evenly opened; a rotating shaft 44 rotatably connected to the limiting plate 43; a support plate 45 connected to the upper part of the rotating shaft 44 by a flat key, used to support the packaging barrel, on which four second inclined grooves 451 are evenly opened, and the packaging barrel is placed on the support plate 45; a gear 46 connected to the rotating shaft 44 through a keyway, located between the limiting plate 43 and the support plate 45, on which four third inclined grooves 461 are evenly opened, and the gear 46 meshes with the gear ring 41.

[0038] The four first inclined grooves 431, the four second inclined grooves 451 and the four third inclined grooves 461 are vertically corresponding in sequence.

[0039] The expanding mechanism 5 includes: four support frames 51, all located inside the packaging barrel, used to support the packaging barrel in an internal expanding manner, respectively slidably connected to four second inclined grooves 451, and the bottoms of the four support frames 51 are respectively slidably connected to four third inclined grooves 461; there are four first return springs 52 respectively connected between the mutually approaching ends of the four support frames 51 and the bottom of the rotating shaft 44; four contact strips 53 respectively welded to the bottoms of the four support frames 51; four expanding frames 54 respectively slidably connected to four first inclined grooves 431, and the outer sides of the tops of the four expanding frames 54 are respectively in contact with the inner sides of the four contact strips 53; an extrusion ring 55 welded to the bottom of the inner wall of the outer frame 2, used to extrude the four expanding frames 54 to expand in a mutually separated direction.

[0040] The length of the contact strip 53 is greater than the gap length between the four expanding frames 54 after expansion, so that the contact strip 53 will not be separated from the expanding frame 54 during rotation.

[0041] The painting mechanism 6 includes: an extrusion block 61 vertically slidably connected to the side of the limiting plate 43 away from the rotating arm 42; an extrusion strip 62 welded to one side of the inner bottom of the outer frame 2, used to lift the extrusion block 61; a slide rail 63 welded to the inner side wall of the outer frame 2, which is an arc-shaped structure; a sliding frame 64 slidably connected to the slide rail 63, located on one side of the slide rail 63; two tension springs 65 connected between the sliding frame 64 and one end of the slide rail 63, both sleeved on the slide rail 63; a spraying assembly 66 arranged on the sliding frame 64, used to spray paint on the surface of the packaging barrel when following and stop when resetting.

[0042] The spraying assembly 66 includes: a right-angle valve 661 installed on the top of the sliding frame 64, with a right-angle channel 6611 and an arc groove 6612 opened inside, the right-angle channel 6611 and the arc groove 6612 are communicated, one side of the arc groove 6612 is communicated with the outside of the right-angle valve 661, and the arc groove 6612 is located in the middle of the right-angle channel 6611; a connecting pipe 662 installed on one side of the right-angle valve 661 and communicated with one side of the right-angle channel 6611, one end of the connecting pipe 662 is located outside the outer frame 2, and the connecting pipe 662 is used to connect the external paint; a baffle 663 slidably connected inside the arc groove 6612, used to block or open the right-angle channel 6611, and the baffle 663 blocks the flow of the right-angle channel 6611 in the arc groove 6612; a rubber block 664 installed at the bottom of the baffle 663 and slidably connected to the chute; a spray pipe 665 installed on the top of the right-angle valve 661, the bottom of which is communicated with the top of the right-angle channel 6611; a plurality of nozzles 666 evenly arranged on one side of the spray pipe 665, used to evenly spray the paint on the surface of the packaging barrel.

[0043] First, the staff connects the external paint through a pipe and pumps it into the connecting pipe 662. The paint pumped into the connecting pipe 662 will enter the right-angle channel 6611 and be blocked by the baffle 663. Then the staff will turn the packaging barrel to be painted upside down on the support plate 45 with the barrel mouth facing down, and then the staff will start the motor 3; the rotation of the output shaft of the motor 3 will drive the driving mechanism 4 (except the ring gear 41), the opening mechanism 5 (except the extrusion ring 55) and the packaging barrel to move along the arc direction, and the movement of the gear 46 will drive the rotating shaft 44, the support plate 45 and the packaging barrel to rotate together through the ring gear 41, and then drive the packaging barrel to move and rotate at the same time. When the support plate 45 and the gear 46 rotate, the support frame 51 and the contact strip 53 will be driven to rotate together. When the opening frame 54 moves to one side of the extrusion ring 55 , one end of the extrusion ring 55 will first squeeze the bottom of the four expansion frames 54 to move away from each other to form an expansion state, and then the extrusion ring 55 will keep squeezing the bottom of the expansion frame 54, so that the four expansion frames 54 remain in the expansion state, and when the four expansion frames 54 are expanded, they will squeeze the four contact strips 53 and the four support frames 51 to move away from each other to form an expansion state, and the four reset springs 52 will be stretched. Since the length of the contact strip 53 is greater than the gap length between the four expansion frames 54 after expansion, the contact strip 53 will never be out of contact with the expansion frame 54 when rotating. When the four support frames 51 are expanded, they will squeeze the inner wall of the packaging barrel, thereby positioning and fixing the packaging barrel, so that the subsequent painting is more accurate and stable, thereby enhancing the painting effect; When the limit plate 43 moves along the arc direction, it will drive the extrusion block 61 to move. After the extrusion block 61 moves a certain distance, it will contact the sliding frame 64. Then the extrusion block 61 continues to move to squeeze the sliding frame 64 to move along the slide rail 63. The two tension springs 65 are stretched along the slide rail 63. The movement of the sliding frame 64 will drive the spray assembly 66 to move with the packaging barrel. Under the material of the rubber block 664, when the right-angle valve 661 moves a short distance, it will not drive the rubber block 664 and the baffle 663 to move, so that the baffle 663 moves to one side of the arc groove 6612, and then the baffle 663 no longer blocks the right-angle channel 6611, and the pumped paint will be pumped into the spray assembly through the right-angle channel 6611 and the arc groove 6612. The paint in the nozzle 665 will then be evenly sprayed on the side surface of the rotating packaging barrel through a plurality of nozzles 666. The right-angle valve 661 continues to move, pulling the baffle 663 and the rubber block 664 to move together. During the movement of the nozzle 665 and the nozzle 666, the side surface of the packaging barrel will be evenly sprayed with paint. When the extrusion block 61 moves to the extrusion bar 62, the paint just sprays the side surface of the packaging barrel for a circle. At the same time, the extrusion bar 62 will lift the extrusion block 61, and the extrusion block 61 will be lifted and out of contact with the sliding frame 64. The reset of the tension spring 65 will drive the sliding frame 64 to reset along the slide rail 63. The reset of the sliding block will drive the spraying assembly 66 to reset. Under the action of the material, when the right-angle valve 661 is reset for a short distance, the rubber block 664 and the baffle 663 will not move in the original position, so that the baffle 663 blocks the right-angle channel 6611 again along the arc groove 6612, so that the paint is no longer sprayed out through the nozzle 666, and then the right-angle valve 661 continues to reset and drives the baffle 663 and the rubber block 664 to reset together, and the extrusion block 61 continues to move and disengages from the extrusion strip 62, and the extrusion block 61 is reset under the action of gravity. In this way, the paint spraying can be stopped immediately after spraying a week of paint in the packaging barrel, so that the paint thickness is consistent and the waste of paint is saved; the support frame 54 continues to move and disengages from the extrusion ring 55, and the four reset springs 52 The resetting will drive the four support frames 51 to reset respectively. The resetting of the four support frames 51 drives the four contact strips 53 to squeeze the four support frames 54 to reset in the direction of approaching each other. The reset of the support frames 51 no longer fixes the packaging barrel. The staff removes the packaging barrel after painting, and then places the new packaging barrel to be painted on the support plate 45, and repeats this process. After all the packaging barrels are painted, the staff turns off the motor 3 and removes the external paint from the connecting pipe 662 through the pipeline. In this way, the staff only needs to remove the packaging barrel after painting and place the packaging barrel to be painted to complete the painting work, which is more convenient for the staff to use, thereby improving the painting efficiency.

[0044] Embodiment 2: Based on embodiment 1, Figures 2 - 17As shown in the figure, it further includes a cleaning mechanism 7 for wiping the nozzle 666 during reset. The cleaning mechanism 7 is arranged on the slide rail 63 and includes: a pressure-receiving frame 71 slidably connected to the slide rail 63, located on the side of the sliding frame 64 away from the tension spring 65, and one end of the pressure-receiving frame 71 passes through one side of the sliding frame 64; two second reset springs 72 connected between the pressure-receiving frame 71 and the sliding frame 64, both sleeved on the slide rail 63; a fixing plate 73 welded to the pressure-receiving frame 71; a wiping strip 74 vertically slidably connected to the fixing plate 73, contacting a plurality of nozzles 666, and used for wiping the residual paint on the nozzles 666 during reset; a limiting ring 75 welded to the inner side wall of the outer frame 2, with a wavy groove 751 opened on the limiting ring 75, and the bottom of the wiping strip 74 is slidably connected to the wavy groove 751.

[0045] The surface of the wiping strip 74 close to the nozzle 666 is made of cloth material, which can make the wiping more effective.

[0046] During painting, before the extrusion block 61 contacts the sliding frame 64, the movement of the extrusion block 61 will first squeeze the part of the pressure-receiving frame 71 that passes through the sliding frame 64, causing the pressure-receiving frame 71 to move away from the sliding frame 64, and the second reset spring 72 is stretched. The movement of the pressure-receiving frame 71 will drive the fixing plate 73 and the wiping strip 74 to move together. When the extrusion block 61 continues to move, one end of the pressure-receiving frame 71 will be flush with one side of the sliding frame 64, so that the wiping strip 74 will be separated from the nozzle 666 and will not affect the normal use of the nozzle 666. After the painting is completed, when the extrusion block 61 moves upward, it will be separated from the sliding frame 64 and the pressure-receiving frame 71 at the same time. The reset of the second reset spring 72 will drive the pressure-receiving frame 71, the fixing plate 73 and the wiping strip 74 to reset together. When the wiping strip 74 resets, it will contact the nozzle 666 again. When the sliding frame 64 resets, it will drive the cleaning mechanism 7 (except the limiting ring 75) to reset through the second reset spring 72. At the same time when the wiping strip 74 resets, the wavy groove 751 of the limiting ring 75 will squeeze the wiping strip 74 to move up and down reciprocally. The up and down reciprocal movement of the wiping strip 74 will continuously wipe the residual paint on the nozzle 666, so that the nozzle 666 is not easily blocked due to the solidification of the residual paint when the painting stops, and then the flow rate of each painting is consistent, and then the painting is more uniform, thereby further enhancing the painting effect on the packaging barrel.

[0047] The above embodiments are only preferred embodiments of the present invention and are not used to limit the scope of implementation of the present invention. Therefore, all equivalent changes made according to the content described in the claims of the present invention should be included within the scope of the claims of the present invention.

Claims

1. A paint spraying device for producing paint packaging barrels, characterized in that: include: Base (1); An outer frame (2) is fixedly connected to the base (1); A motor (3) is mounted on the outer frame (2); A driving mechanism (4) is arranged inside the outer frame (2), and a packaging barrel is placed on the driving mechanism (4); The expansion mechanism (5) is arranged on the driving mechanism (4); The paint spraying mechanism (6) is arranged on the driving mechanism (4).

2. A paint spraying device for producing paint packaging barrels as claimed in claim 1, characterized in that: The driving mechanism (4) comprises: a gear ring (41) fixedly connected to the top of the inner wall of the outer frame (2); a rotating arm (42) mounted on the output shaft of the motor (3); a limit plate (43) fixedly connected to one end of the rotating arm (42), the limit plate (43) being evenly provided with four inclined grooves 1 (431); a rotating shaft (44) rotatably connected to the limit plate (43); a support plate (45) fixedly connected to the upper part of the rotating shaft (44), the support plate (45) being evenly provided with four inclined grooves 2 (451), the packaging barrel being placed on the support plate (45); and a gear (46) fixedly connected to the rotating shaft (44), the gear (46) being evenly provided with four inclined grooves 3 (461), the gear (46) being meshed with the gear ring (41).

3. A paint spraying device for producing paint packaging barrels as claimed in claim 2, characterized in that: The four inclined slots 1 (431), the four inclined slots 2 (451) and the four inclined slots 3 (461) correspond to each other vertically.

4. A paint spraying device for producing paint packaging barrels as claimed in claim 2, characterized in that: The spreading mechanism (5) comprises: four support frames (51) respectively connected in a sliding manner to four inclined slots 2 (451), and the bottoms of the four support frames (51) are respectively connected in a sliding manner to four inclined slots 3 (461); four return springs 1 (52) are connected between the ends of the four support frames (51) close to each other and the bottoms of the rotating shafts (44); four contact strips (53) respectively fixed to the bottoms of the four support frames (51); four spreading frames (54) respectively connected in a sliding manner to the four inclined slots 1 (431), and the outer sides of the tops of the four spreading frames (54) are respectively in contact with the inner sides of the four contact strips (53); and an extrusion ring (55) fixed to the bottom of the inner wall of the outer frame (2).

5. A paint spraying device for producing paint packaging barrels as claimed in claim 4, characterized in that: The length of the contact strip (53) is greater than the length of the gap between the four expansion frames (54) after expansion.

6. A paint spraying device for producing paint packaging barrels as claimed in claim 4, characterized in that: The paint spraying mechanism (6) comprises: an extrusion block (61) vertically slidably connected to a side of the limit plate (43) away from the rotating arm (42); an extrusion strip (62) fixedly connected to one side of the inner bottom of the outer frame (2); a slide rail (63) fixedly connected to the inner side wall of the outer frame (2); a slide frame (64) slidably connected to the slide rail (63); two tension springs (65) connected between the slide frame (64) and one end of the slide rail (63), both of which are sleeved on the slide rail (63); and a spraying assembly (66) arranged on the slide frame (64).

7. A paint spraying device for producing paint packaging barrels as claimed in claim 6, characterized in that: The spray assembly (66) comprises: a right-angle valve (661) installed on the top of the sliding frame (64), with a right-angle channel (6611) and an arc groove (6612) formed inside, the right-angle channel (6611) and the arc groove (6612) being connected, and one side of the arc groove (6612) being connected to the outside of the right-angle valve (661); a connecting pipe (662) installed on one side of the right-angle valve (661) and connected to one side of the right-angle channel (6611), one end of the connecting pipe (662) being located on the outer frame (2); a baffle (663) slidably connected to the inside of the arc groove (6612), the baffle (663) being located in the arc groove (6612) to block the flow of the right-angle channel (6611); a rubber block (664) mounted on the bottom of the baffle (663) and slidably connected to the slide groove; a nozzle (665) mounted on the top of the right-angle valve (661), the bottom of which is connected to the top of the right-angle channel (6611); and a plurality of nozzles (666) evenly arranged on one side of the nozzle (665).

8. A paint spraying device for producing paint packaging barrels as claimed in claim 7, characterized in that: The cleaning mechanism (7) is used for wiping the nozzle (666) for cleaning when resetting, and is arranged on the slide rail (63). The cleaning mechanism (7) includes: a pressure frame (71) slidably connected to the slide rail (63), one end of the pressure frame (71) passing through one side of the slide frame (64); two reset springs (72) connected between the pressure frame (71) and the slide frame (64), both of which are sleeved on the slide rail (63); a fixed plate (73) fixedly connected to the pressure frame (71); a wiping strip (74) vertically slidably connected to the fixed plate (73) and in contact with a plurality of nozzles (666); a limiting ring (75) fixedly connected to the inner side wall of the outer frame (2), the limiting ring (75) having a wave groove (751) formed thereon, and the bottom of the wiping strip (74) being slidably connected to the wave groove (751).

9. A paint spraying device for producing paint packaging barrels as claimed in claim 8, characterized in that: The side of the wiping strip (74) close to the nozzle (666) is made of cloth-like material.

Images