Automatic paint spraying assembly line for plastic parts

Abstract

The invention discloses an automatic paint spraying assembly line for plastic parts, and relates to the technical field of automatic paint spraying, the automatic paint spraying assembly line comprises a plastic conveyor, an electric lifting table and a concave clamping block are arranged at the bottom of the front face of the plastic conveyor, the concave clamping block is arranged at the moving end of the electric lifting table, and a machine shell is slidably mounted on the inner wall of the concave clamping block; a second servo motor is installed on the back face of the inner wall of the machine shell, a screw rod is fixed to the back face of a rotating shaft of the second servo motor, the back face of the screw rod penetrates through the front face of the inner wall of the machine shell and is rotationally connected with the front face of the inner wall of the machine shell, the inner screw block is fixed to the right side of the inner wall of a concave clamping block, and the inner wall of the inner screw block is meshed with a threaded groove in the outer wall of the screw rod; an annular plate pulls a spring to stretch out and draw back in a reciprocating mode, and therefore the problem that the thickness of paint on the surface of a plastic part is not uniform due to the fact that an electric paint spraying gun shakes when the electric paint spraying gun moves to spray paint is solved.

Description

Technical Field

[0001] This invention relates to the field of automatic spray painting technology, specifically to an automatic spray painting production line for plastic parts. Background Technology

[0002] With the rapid development of industries such as automobiles, home appliances, consumer electronics, and daily consumer goods, there are higher requirements for the appearance quality (color, gloss, texture) of plastic parts. Manual painting cannot meet the needs of large-scale and consistent production. Automated plastic parts painting production lines are equipment that spray paint the surface of plastic parts on an assembly line, which significantly improves production efficiency and coating quality.

[0003] Patent CN212120574U discloses a spray painting production line, belonging to the technical field of spray painting equipment. It includes a spray painting chamber and a drying chamber, which are connected sequentially in the direction of the production line via a channel steel. Several hanging rods are slidably arranged on the channel steel. A cleaning chamber is arranged on the side of the spray painting chamber away from the drying chamber. A brush is arranged in the cleaning chamber, and the brush can abut against the surface of the part to be painted. This patent has the effect of facilitating the enhancement of the quality of painted iron products.

[0004] However, the current painting production line has the following problems: During the process of painting plastic parts on the production line, the electric paint gun is prone to shaking when moving and spraying, which leads to uneven paint thickness on the surface of the plastic parts. Therefore, we propose an automatic painting production line for plastic parts. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides an automated painting production line for plastic parts, solving the problems mentioned in the background section.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an automatic painting production line for plastic parts, comprising: a plastic conveyor, wherein an electric lifting platform is provided at the bottom front of the plastic conveyor; a recessed clamping block is located at the moving end of the electric lifting platform; a housing is slidably mounted on the inner wall of the recessed clamping block; a second servo motor is mounted on the back of the inner wall of the housing; a screw is fixed to the back of the shaft of the second servo motor; the back of the screw penetrates and is rotatably connected to the front of the inner wall of the housing; an inner screw block is fixed to the right side of the inner wall of the recessed clamping block; the threaded grooves of the inner wall of the inner screw block and the outer wall of the screw mesh with each other; and a third servo motor is mounted on the left side of the housing. An electric paint spray gun is fixed to the outer wall of the shaft of a servo motor. A U-shaped rod is fixed to the top surface of the housing. A slip ring is fixed to the top surface of a recessed block. A ring plate is fixed to the outer wall of the U-shaped rod. A spring is directly installed on the back of the ring plate and the front of the slip ring. Under the constraint of the recessed block, the screw reciprocates back and forth in the threaded groove of the inner screw block. The screw drives the housing to reciprocate back and forth, the housing drives the U-shaped rod to reciprocate back and forth, the U-shaped rod reciprocates back and forth in the slip ring, and the U-shaped rod drives the ring plate to reciprocate back and forth. The ring plate pulls the spring to reciprocate and extend. The elastic force of the spring is used to reduce the vibration amplitude when the housing moves.

[0007] According to the above technical solution, the electric lifting platform includes: a U-shaped frame, a servo motor, a long shell, a threaded rod, and a threaded ring. The U-shaped frame is fixed to the bottom front of the plastic conveyor. The servo motor is fixedly installed inside the bottom of the U-shaped frame. The long shell is fixed to the middle of the top surface of the U-shaped frame. A sliding groove is provided on the top of the outer wall of the long shell. The threaded rod passes through and is rotatably installed inside the top and bottom of the long shell. The bottom end of the threaded rod is fixedly connected to the top of the rotating shaft of the servo motor. A non-self-locking threaded groove is provided on the outer wall of the threaded rod. The threaded ring is slidably installed on the outer wall of the threaded rod. The inner wall of the threaded ring meshes with the threaded groove of the threaded rod. The right side of the threaded ring is fixedly connected to the left side of the concave locking block. The outer wall of the concave locking block slides in contact with the inner wall of the sliding groove of the long shell.

[0008] According to the above technical solution, a paint storage tank is provided at the bottom of the plastic conveyor, a hose is provided at the top of the electric paint spray gun, and a liquid suction pump is provided at the end of the hose away from the electric paint spray gun. The liquid suction pump is located at the bottom of the paint storage tank.

[0009] According to the above technical solution, a sliding groove is provided on both the top and bottom surfaces of the housing, the inner wall of the sliding groove of the housing is slidably connected to the inner wall of the recessed block, a non-self-locking threaded groove is provided on the outer wall of the screw, and the spring is sleeved on the U-shaped rod.

[0010] According to the above technical solution, the housing is located above the plastic conveyor, the servo motor is located behind the electric lifting platform, and the electric paint spray gun is located on the right side of the housing.

[0011] According to the above technical solution, a drying device is provided on the outer wall of the U-shaped rod. The drying device is used to dry the paint on the surface of the plastic parts transported by the plastic conveyor. An anti-splash device is provided on the right side of the drying device. The anti-splash device is used to block the paint from splashing forward.

[0012] According to the above technical solution, the drying device includes: a ring frame fixed on the outer wall of a U-shaped rod, the ring frame being located above the housing; a square shell fixed on the back of the ring frame, with a resistance heater passing through and fixed on the left side of the inner wall of the square shell; an air inlet pipe passing through and fixed in the top surface of the square shell, the top surface of the air inlet pipe being used to connect an air pump; and an inclined air trough located on the bottom surface of the square shell. The air pump sends gas into the air inlet pipe, the resistance heater heats the gas in the square shell, and the square shell drives the inclined air trough to move back and forth. The inclined air trough is used to spray out heated gas to dry the surface of the plastic part.

[0013] According to the above technical solution, an L-shaped plate is fixed to the top surface of the ring frame, a U-shaped vertical plate is fixed to the bottom surface of the L-shaped plate, and a ring straight plate is fixed to the outer wall of the shaft of the servo motor three. The ring straight plate is located inside the U-shaped vertical plate. The ring frame drives the L-shaped plate to move back and forth, the L-shaped plate drives the U-shaped vertical plate to move back and forth, and the shaft of the servo motor three drives the ring straight plate to rotate. The U-shaped vertical plate is used to limit the rotation angle of the shaft of the servo motor three.

[0014] According to the above technical solution, the anti-splash device includes: a cylinder, which is embedded in the right side of an L-shaped plate; a double-arc plate, which is fixed to the right end of the cylinder; a thin rod, which passes through and is fixed to the bottom left side of the double-arc plate, with one end of the thin rod away from the double-arc plate fixedly connected to the outer wall of the housing; and an arc baffle, the inner wall of which is fixedly connected to the outer wall of the thin rod. The double-arc plate drives the thin rod to move back and forth reciprocally, and the thin rod drives the arc baffle to move back and forth reciprocally. The arc baffle is used to block paint from splashing forward when the electric paint spray gun is spraying paint.

[0015] According to the above technical solution, a connecting ring is fixed to the outer wall of the cylinder, a bent plate is fixed to the top surface of the connecting ring, and a ring block is fixed to the end of the bent plate away from the connecting ring. The connecting ring drives the bent plate to move back and forth, and the bent plate drives the ring block to move back and forth. The ring block is fitted onto the hose of the electric paint spray gun.

[0016] This invention provides an automated painting production line for plastic parts. It has the following advantages:

[0017] (1) The present invention uses a plastic conveyor, an electric lifting platform, a concave block, a housing, a second servo motor, a screw, an inner screw block, a third servo motor, an electric paint gun, a U-shaped rod, a slip ring, and a spring in conjunction with a ring plate. Under the restriction of the concave block, the screw moves back and forth in the threaded groove of the inner screw block. The screw drives the housing to move back and forth, the housing drives the U-shaped rod to move back and forth, the U-shaped rod moves back and forth in the slip ring, the U-shaped rod drives the ring plate to move back and forth, and the ring plate pulls the spring to reciprocate and extend. Under the elastic force of the spring, the amplitude of the housing movement is reduced, preventing the electric paint gun from shaking during painting and causing uneven paint thickness on the surface of the plastic parts.

[0018] (2) The present invention, through the setting of the drying device, makes the ring frame, the square shell, the resistance heater and the air inlet pipe cooperate with the inclined air groove. The air pump sends the gas into the air inlet pipe, the resistance heater heats the gas in the square shell, the square shell drives the inclined air groove to move back and forth, and the inclined air groove sprays hot air to dry the paint on the surface of the plastic parts, so as to prevent the paint on the surface of the plastic parts from drying slowly, resulting in poor paint drying effect.

[0019] (3) The present invention, through the setting of the drying device, makes the L-shaped plate and the U-shaped vertical plate cooperate with the ring straight plate. The ring frame drives the L-shaped plate to move back and forth, the L-shaped plate drives the U-shaped vertical plate to move back and forth, the shaft of the servo motor three drives the ring straight plate to rotate, and the U-shaped vertical plate limits the rotation of the ring straight plate to prevent the electric paint gun from rotating too much and causing poor paint effect on the surface of the dried plastic parts.

[0020] (4) The present invention, through the setting of the anti-splash device, makes the cylinder, double arc plate and thin rod cooperate with the arc baffle. The double arc plate drives the thin rod to move back and forth, and the thin rod drives the arc baffle to move back and forth, preventing the paint sprayed by the electric paint gun from splashing forward and causing a large amount of paint to accumulate on the electric lifting platform.

[0021] (5) The present invention, through the setting of the anti-splash device, makes the connecting ring and the bending plate cooperate with the ring block. The connecting ring drives the bending plate to move back and forth, and the bending plate drives the ring block to move back and forth. The ring block is fitted on the hose to prevent the hose from getting tangled together and causing the electric spray gun to be blocked. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the entire invention;

[0023] Figure 2 This is a schematic diagram of the internal components of the present invention;

[0024] Figure 3 This is a cross-sectional schematic diagram of the electric lifting platform of the present invention;

[0025] Figure 4 This is a cross-sectional view of the housing of the present invention;

[0026] Figure 5 For the present invention Figure 4 A magnified view of a portion of point A in the middle;

[0027] Figure 6 This is a schematic diagram of the drying apparatus of the present invention;

[0028] Figure 7 For the present invention Figure 6 A magnified view of a portion of point B in the middle;

[0029] Figure 8 This is a schematic diagram of the anti-splash device of the present invention;

[0030] Figure 9 For the present invention Figure 8 A magnified view of a portion of point C.

[0031] In the diagram: 1. Plastic conveyor; 2. Electric lifting platform; 201. U-shaped frame; 202. Servo motor one; 203. Long shell; 204. Threaded rod; 205. Threaded ring; 3. Concave locking block; 4. Machine housing; 5. Servo motor two; 6. Screw; 7. Inner thread block; 8. Servo motor three; 9. Electric paint spray gun; 10. U-shaped rod; 11. Slip ring; 12. Spring; 13. Ring plate; 14. Drying device; 141. Ring frame; 142. Square shell; 143. Resistance heater; 144. Air inlet pipe; 145. Inclined air groove; 146. L-shaped plate; 147. U-shaped vertical plate; 148. Ring straight plate; 15. Anti-splash device; 151. Cylindrical; 152. Double arc plate; 153. Thin rod; 154. Arc baffle; 155. Connecting ring; 156. Bend plate; 157. Ring block. Detailed Implementation

[0032] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0033] Please see Figures 1-9One embodiment of the present invention is: an automatic painting production line for plastic parts, comprising: a plastic conveyor 1, a paint storage tank disposed at the bottom of the interior of the plastic conveyor 1, and an electric lifting platform 2 disposed at the bottom of the front of the plastic conveyor 1. The electric lifting platform 2 comprises: a U-shaped frame 201, a servo motor 202, a long shell 203, a threaded rod 204, and a threaded ring 205. The U-shaped frame 201 is fixed to the bottom of the front of the plastic conveyor 1, the servo motor 202 is fixedly installed at the bottom of the interior of the U-shaped frame 201, and the long shell 203 is fixed in the middle of the top surface of the U-shaped frame 201. The outer wall of the long shell 203... A groove is provided at the top, and a threaded rod 204 is installed through and rotatably inside the top and bottom of the long shell 203. The bottom of the threaded rod 204 is fixedly connected to the top of the servo motor shaft. A non-self-locking threaded groove is provided on the outer wall of the threaded rod 204. A threaded ring 205 is slidably installed on the outer wall of the threaded rod 204. The inner wall of the threaded ring 205 meshes with the threaded groove of the threaded rod 204. A concave locking block 3 is provided at the moving end of the electric lifting platform 2. The right side of the threaded ring 205 is fixedly connected to the left side of the concave locking block 3. The outer wall of the concave locking block 3 slides in contact with the inner wall of the groove of the long shell 203.

[0034] A housing 4 is slidably mounted on the inner wall of the recessed block 3. The housing 4 is located above the plastic conveyor 1. A groove is provided on both the top and bottom surfaces of the housing 4. The inner wall of the groove of the housing 4 is slidably connected to the inner wall of the recessed block 3. A servo motor 5 is mounted on the back of the inner wall of the housing 4. A screw 6 is fixed to the back of the shaft of the servo motor 5. The back of the screw 6 penetrates and is rotatably connected to the front of the inner wall of the housing 4. A non-self-locking threaded groove is provided on the outer wall of the screw 6. An inner screw block 7 is fixed inside the recessed block 3. On the right side of the wall, the inner wall of the inner screw block 7 and the outer wall of the screw 6 are engaged with each other by the threaded groove. Servo motor 3 8 is installed on the left side of the housing 4. Servo motor 3 8 is located behind the electric lifting platform 2. Electric paint gun 9 is fixed on the outer wall of the rotating shaft of servo motor 3 8. Electric paint gun 9 is located on the right side of the housing 4. A hose is provided on the top of electric paint gun 9. A suction pump is provided at the end of the hose away from electric paint gun 9. The suction pump is located at the bottom of the inside of the paint storage tank.

[0035] U-shaped rod 10, fixed to the top surface of housing 4; slip ring 11, fixed to the top surface of recessed block 3; ring plate 13, fixed to the outer wall of U-shaped rod 10; spring 12 is directly provided on the back of ring plate 13 and the front of slip ring 11; spring 12 is sleeved on U-shaped rod 10; the elastic force of spring 12 is used to reduce the vibration amplitude when housing 4 moves.

[0036] When using this equipment, the operator places the plastic part on the plastic conveyor 1. The plastic conveyor 1 moves the plastic part to the right. At the same time, the operator starts the electric lifting platform 2. The shaft of the servo motor 202 in the U-shaped frame 201 starts to rotate clockwise. The shaft of the servo motor 202 drives the threaded rod 204 to rotate clockwise. The threaded rod 204 rotates clockwise within the long shell 203. Under the constraint of the long shell 203, the threaded ring 205 moves upward within the thread groove of the threaded rod 204. The threaded ring 205 drives the concave clamp. Block 3 moves downwards, and the recessed locking block 3 moves upwards in the groove of the long shell 203. The recessed locking block 3 drives the housing 4 to move upwards. When the housing 4 moves above the plastic part, the operator starts the second servo motor 5. The shaft of the second servo motor 5 begins to rotate in both directions. The shaft of the second servo motor 5 drives the screw 6 to rotate in both directions. The screw 6 rotates in both directions in the housing 4. Under the restriction of the recessed locking block 3, the screw 6 moves back and forth in the thread groove of the inner screw block 7. The screw 6 drives the housing 4 to move back and forth. The machine housing 4 moves back and forth within the recessed locking block 3, driving the servo motor 8 to move back and forth as well. The operator starts the servo motor 8, causing its shaft to rotate in both directions. This rotation drives the electric spray gun 9 to rotate. Simultaneously, the operator starts the electric spray gun 9, and the suction pump draws paint from the storage tank. The paint enters a hose, which then delivers the paint to the electric spray gun 9. The electric spray gun 9 rotates and sprays the paint onto the surface of the plastic part. At the same time, the machine... The housing 4 drives the U-shaped rod 10 to move back and forth. The U-shaped rod 10 moves back and forth in the slip ring 11. The U-shaped rod 10 drives the ring plate 13 to move back and forth. The ring plate 13 pulls the spring 12 to extend and retract. Under the elastic force of the spring 12, the amplitude of the housing 4 when it moves is reduced, so that the electric paint gun 9 will not vibrate violently during the painting process. This avoids the problem of uneven paint thickness on the surface of plastic parts caused by the vibration of the electric paint gun 9 when it moves to spray paint in the automatic painting production line.

[0037] A drying device 14 is provided on the outer wall of the U-shaped rod 10. The drying device 14 is used to dry the paint on the surface of the plastic parts transported by the plastic conveyor 1. An anti-splash device 15 is provided on the right side of the drying device 14. The anti-splash device 15 is used to block the paint from splashing forward.

[0038] Working principle: The plastic part is placed on the plastic conveyor 1. The plastic conveyor 1 moves the plastic part to the right. The shaft of servo motor 1 202 drives the threaded rod 204 to rotate clockwise. Under the constraint of the long shell 203, the threaded ring 205 moves upward in the threaded groove of the threaded rod 204. The threaded ring 205 drives the concave locking block 3 to move downward. The concave locking block 3 moves upward in the sliding groove of the long shell 203. The concave locking block 3 drives the machine housing 4 to move upward. The machine housing 4 moves above the plastic part. The shaft of servo motor 2 5 drives the screw 6 to rotate clockwise and counterclockwise. The screw 6 rotates clockwise and counterclockwise in the machine housing 4. Under the constraint of the concave locking block 3, the screw 6 moves in the inner screw block 7. The screw 6 moves back and forth in the threaded groove, the screw 6 drives the housing 4 to move back and forth, the housing 4 moves back and forth in the recessed block 3, the housing 4 drives the servo motor 8 to move back and forth, the shaft of the servo motor 8 drives the electric spray gun 9 to rotate, the suction pump draws paint from the paint storage tank, the paint enters the hose, the hose delivers the paint into the electric spray gun 9, the electric spray gun 9 rotates and sprays paint onto the surface of the plastic part, the housing 4 drives the U-shaped rod 10 to move back and forth, the U-shaped rod 10 moves back and forth in the slip ring 11, the U-shaped rod 10 drives the ring plate 13 to move back and forth, the ring plate 13 pulls the spring 12 to reciprocate.

[0039] Please see Figures 1-9 Based on the above embodiments, in another embodiment of the present invention, the drying device 14 includes: a ring frame 141, which is fixed on the outer wall of the U-shaped rod 10 and is located above the housing 4; a square shell 142, which is fixed on the back of the ring frame 141 and has a resistance heater 143 that is fixed through and fixed on the left side of the inner wall of the square shell 142; an air inlet pipe 144, which is fixed through and fixed in the top surface of the square shell 142 and is used to connect an air pump; and an inclined air groove 145, which is provided on the bottom surface of the square shell 142 and is used to spray heated gas to dry the surface of the plastic part.

[0040] While the U-shaped rod 10 drives the ring plate 13 to move back and forth, the U-shaped rod 10 drives the ring frame 141 to move back and forth, the ring frame 141 drives the square shell 142 to move back and forth, and the square shell 142 drives the air inlet pipe 144 to move back and forth. The air pump sends gas into the air inlet pipe 144, and the air inlet pipe 144 delivers gas into the square shell 142. The operator starts the resistance heater 143, which heats the gas in the square shell 142. The square shell 142 drives the inclined air groove 145 to move back and forth. During the movement, the inclined air groove 145 sprays hot air to dry the paint on the surface of the plastic parts, thus avoiding the problem of slow paint drying speed on the surface of plastic parts and poor paint drying effect in automatic painting production lines.

[0041] An L-shaped plate 146 is fixed to the top surface of the ring frame 141, and a U-shaped vertical plate 147 is fixed to the bottom surface of the L-shaped plate 146. A ring straight plate 148 is fixed to the outer wall of the shaft of the servo motor 3 8. The ring straight plate 148 is located inside the U-shaped vertical plate 147. The U-shaped vertical plate 147 is used to limit the rotation angle of the shaft of the servo motor 3 8.

[0042] While the ring frame 141 drives the square shell 142 to move back and forth, the ring frame 141 drives the L-shaped plate 146 to move back and forth, and the L-shaped plate 146 drives the U-shaped vertical plate 147 to move back and forth. At the same time, during the forward and reverse reciprocating rotation of the servo motor 38 shaft, the servo motor 38 shaft drives the ring straight plate 148 to rotate. The U-shaped vertical plate 147 limits the rotation of the ring straight plate 148, so that the electric paint gun 9 on the servo motor 38 shaft will not rotate excessively. This avoids the problem of poor paint effect on the surface of dry plastic parts caused by excessive rotation of the electric paint gun 9 during painting in the automatic painting production line.

[0043] The anti-splash device 15 includes: a cylinder 151, which is embedded in the right side of the L-shaped plate 146; a double arc plate 152, which is fixed to the right end of the cylinder 151; a thin rod 153, which passes through and is fixed to the bottom left side of the double arc plate 152, with one end of the thin rod 153 away from the double arc plate 152 being fixedly connected to the outer wall of the housing 4; and an arc baffle 154, whose inner wall is fixedly connected to the outer wall of the thin rod 153. The arc baffle 154 is used to block paint from splashing forward when the electric paint spray gun 9 is spraying paint.

[0044] While the L-shaped plate 146 drives the U-shaped vertical plate 147 to move back and forth, the L-shaped plate 146 drives the cylinder 151 to move back and forth, the cylinder 151 drives the double arc plate 152 to move back and forth, the double arc plate 152 drives the thin rod 153 to move back and forth, the housing 4 supports the thin rod 153 to move back and forth, the thin rod 153 drives the arc baffle 154 to move back and forth. During the back and forth movement, the arc baffle 154 blocks the paint sprayed by the electric spray gun 9 from splashing forward, thereby avoiding the paint sprayed by the electric spray gun 9 from splashing forward and causing a large amount of paint to accumulate on the electric lifting platform 2 during the automatic painting production line.

[0045] A connecting ring 155 is fixed to the outer wall of the cylinder 151. A bent plate 156 is fixed to the top surface of the connecting ring 155. A ring block 157 is fixed to the end of the bent plate 156 away from the connecting ring 155. The ring block 157 is fitted onto the hose of the electric paint spray gun 9.

[0046] While the cylinder 151 drives the double arc plate 152 to move back and forth, the cylinder 151 drives the connecting ring 155 to move back and forth, the connecting ring 155 drives the bending plate 156 to move back and forth, and the bending plate 156 drives the ring block 157 to move back and forth. During the back and forth movement of the ring block 157, the ring block 157 is fitted onto the hose, so that the hose will not get tangled together when it is displaced, thereby avoiding the problem of the hose getting tangled together and causing the electric spray gun 9 to be blocked during spraying in the automatic spray painting production line.

[0047] Working principle: The U-shaped rod 10 drives the ring frame 141 to move back and forth, the ring frame 141 drives the square shell 142 to move back and forth, the square shell 142 drives the air inlet pipe 144 to move back and forth, the air pump sends gas into the air inlet pipe 144, the air inlet pipe 144 delivers gas into the square shell 142, the resistance heater 143 heats the gas in the square shell 142, the square shell 142 drives the inclined air groove 145 to move back and forth, and the inclined air groove 145 sprays hot air to dry the paint on the surface of the plastic parts during the movement.

[0048] The ring frame 141 drives the L-shaped plate 146 to move back and forth, the L-shaped plate 146 drives the U-shaped vertical plate 147 to move back and forth, and the servo motor 38 shaft rotates during the rotation process, the servo motor 38 shaft drives the ring straight plate 148 to rotate, and the U-shaped vertical plate 147 limits the rotation of the ring straight plate 148.

[0049] L-shaped plate 146 drives cylinder 151 to move back and forth, cylinder 151 drives double arc plate 152 to move back and forth, double arc plate 152 drives thin rod 153 to move back and forth, and housing 4 supports thin rod 153 to move back and forth. Thin rod 153 drives arc baffle 154 to move back and forth.

[0050] The cylinder 151 drives the connecting ring 155 to move back and forth, the connecting ring 155 drives the bent plate 156 to move back and forth, and the bent plate 156 drives the ring block 157 to move back and forth.

[0051] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An automatic paint spraying line for plastic parts, comprising: Plastic conveyor (1), wherein an electric lifting platform (2) is provided at the bottom front of the plastic conveyor (1); A recessed block (3) is set at the moving end of the electric lifting platform (2). A housing (4) is slidably installed on the inner wall of the recessed block (3). A servo motor (5) is installed on the back of the inner wall of the housing (4). A screw (6) is fixed on the back of the rotating shaft of the servo motor (5). The back of the screw (6) penetrates and rotates through the front of the inner wall of the housing (4). The inner screw block (7) is fixed on the right side of the inner wall of the concave block (3), and the inner wall of the inner screw block (7) meshes with the thread groove of the outer wall of the screw (6); Servo motor three (8) is mounted on the left side of the housing (4); An electric paint spray gun (9) is fixed on the outer wall of the shaft of a servo motor (8); U-shaped rod (10), the U-shaped rod (10) is fixed to the top surface of the housing (4); Slip ring (11), the slip ring (11) is fixed to the top surface of the concave block (3); Ring plate (13), the ring plate (13) is fixed on the outer wall of U-shaped rod (10), and spring (12) is directly provided on the back of the ring plate (13) and the front of the slip ring (11). The elastic force of the spring (12) is used to reduce the vibration amplitude when the housing (4) moves.

2. The automatic plastic part painting assembly line according to claim 1, characterized in that: The electric lifting platform (2) includes: a U-shaped frame (201), a servo motor (202), a long shell (203), a threaded rod (204), and a threaded ring (205). The U-shaped frame (201) is fixed to the bottom front of the plastic conveyor (1). The servo motor (202) is fixedly installed inside the bottom of the U-shaped frame (201). The long shell (203) is fixed to the middle of the top surface of the U-shaped frame (201). A sliding groove is provided on the top of the outer wall of the long shell (203). The threaded rod (204) passes through and is rotatably installed. The top and bottom of the long shell (203) are connected. The bottom of the threaded rod (204) is fixedly connected to the top of the servo motor shaft. The outer wall of the threaded rod (204) is provided with a non-self-locking threaded groove. The threaded ring (205) is slidably installed on the outer wall of the threaded rod (204). The inner wall of the threaded ring (205) meshes with the threaded groove of the threaded rod (204). The right side of the threaded ring (205) is fixedly connected to the left side of the concave block (3). The outer wall of the concave block (3) slides in contact with the inner wall of the groove of the long shell (203).

3. The automatic plastic part painting assembly line according to claim 2, characterized in that: The plastic conveyor (1) has a paint storage tank at the bottom inside, and the electric paint spray gun (9) has a hose at the top. A liquid suction pump is installed at the end of the hose away from the electric paint spray gun (9). The liquid suction pump is located at the bottom inside the paint storage tank.

4. The automatic plastic part painting assembly line according to claim 3, characterized in that: The top and bottom surfaces of the housing (4) are provided with a sliding groove. The inner wall of the sliding groove of the housing (4) is slidably connected to the inner wall of the recessed block (3). The outer wall of the screw (6) is provided with a non-self-locking threaded groove. The spring (12) is sleeved on the U-shaped rod (10).

5. The automatic painting production line for plastic parts according to claim 4, characterized in that: The housing (4) is located above the plastic conveyor (1), the servo motor (8) is located behind the electric lifting platform (2), and the electric paint gun (9) is located on the right side of the housing (4).

6. The automatic painting production line for plastic parts according to claim 5, characterized in that: The outer wall of the U-shaped rod (10) is provided with a drying device (14), which is used to dry the paint on the surface of the plastic parts transported by the plastic conveyor (1). A splash guard (15) is provided on the right side of the drying device (14), which is used to block paint from splashing forward.

7. An automatic painting production line for plastic parts according to claim 6, characterized in that: The drying device (14) includes: a ring frame (141), which is fixed on the outer wall of the U-shaped rod (10) and is located above the housing (4); A square shell (142) is fixed to the back of the ring frame (141), and a resistance heater (143) is fixed through and fixed to the left side of the inner wall of the square shell (142). An air intake pipe (144) is inserted through and fixed in the top surface of the square shell (142), and the top surface of the air intake pipe (144) is used to connect an air pump. Inclined air groove (145), the inclined air groove (145) is disposed on the bottom surface of the square shell (142); The inclined air groove (145) is used to spray heated gas to dry the surface of the plastic part.

8. An automatic painting production line for plastic parts according to claim 7, characterized in that: An L-shaped plate (146) is fixed to the top surface of the ring frame (141), and a U-shaped vertical plate (147) is fixed to the bottom surface of the L-shaped plate (146). A ring straight plate (148) is fixed to the outer wall of the shaft of the servo motor three (8). The ring straight plate (148) is located inside the U-shaped vertical plate (147). The U-shaped vertical plate (147) is used to limit the rotation angle of the shaft of the servo motor three (8).

9. An automatic painting production line for plastic parts according to claim 8, characterized in that: The splash-proof device (15) includes: a cylinder (151), which is embedded in the right side of the L-shaped plate (146); A double-arc plate (152) is fixed to the right end of a cylinder (151); A thin rod (153) passes through and is fixed to the bottom left side of the double arc plate (152), and the end of the thin rod (153) away from the double arc plate (152) is fixedly connected to the outer wall of the housing (4); An arc baffle (154) is fixedly connected to the outer wall of a thin rod (153) and is used to block paint from splashing forward when the electric paint spray gun (9) is spraying.

10. An automatic painting production line for plastic parts according to claim 9, characterized in that: A connecting ring (155) is fixed to the outer wall of the cylinder (151), and a bent plate (156) is fixed to the top surface of the connecting ring (155). A ring block (157) is fixed to one end of the bent plate (156) away from the connecting ring (155), and the ring block (157) is fitted onto the hose of the electric paint spray gun (9).

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