Paint spraying equipment for metal product machining

Abstract

The invention relates to the technical field of paint spraying equipment, in particular to paint spraying equipment for metal product machining, which comprises a baffle shell, an electrostatic spray gun, an air exhaust assembly, a reset assembly and a sealing assembly, the baffle shell is detachably mounted on the electrostatic spray gun, and the baffle shell can move left and right when the electrostatic spray gun works; the air exhaust assembly is installed in an inner cavity of the shell, the reset assembly is arranged on the air exhaust assembly, the sealing assembly is arranged in the inner cavity of the shell, the sealing assembly is connected with the air exhaust assembly, and when the air exhaust assembly moves, the sealing assembly works. The shell is blocked between the electrostatic spray gun for paint spraying work and the inner wall of the metal product automobile hub, so that a positive electric field of the inner wall of the hub is prevented from attracting negatively charged powder paint sprayed by the electrostatic spray gun, and the powder paint can be adsorbed to a deep cavity of the hub and a sunken part in the hub; and therefore, the spraying uniformity and the paint spraying effect are improved.

Description

Technical Field

[0001] The invention relates to the technical field of paint spraying equipment, in particular to a paint spraying equipment used for metal product processing. Background Art

[0002] With the progress of society and the development of science and technology, metal products are more and more widely used in industry, agriculture and various fields of people's lives, creating more and more value for society. However, if metal materials are not well protected, they are easily damaged by the surrounding medium. This phenomenon is called metal corrosion. As a metal product, the automobile wheel hub is the part where the axle is installed in the center of the wheel. After die-casting, it generally needs to be sprayed with paint and other post-processing. Spraying paint on the metal surface is a very important means of metal corrosion protection. The existing spraying method is generally to manually operate an electrostatic spray gun to electrostatically spray the surface of the automobile wheel hub. Electrostatic spraying refers to a coating method that uses the principle of corona discharge to make the atomized paint negatively charged under the action of a high-voltage DC electric field and adsorbed on the surface of a positively charged substrate for discharge. The sprayed paint can be adsorbed on the surface of the workpiece by itself, and the electric field force makes it surround the coated object. When spraying, the paint can be adsorbed on the front and side. Low pressure and high atomization effect, uniform coating, and better coating quality, but due to the existence of the Faraday effect of spraying paint, the paint in the deep cavity or some depressions of the automobile wheel hub will be attracted to the external position, affecting the spraying effect.

[0003] The invention patent with application number CN202010746484.X provides an automatic spraying production line for steel wheels. This invention patent combines an air spray gun with an electrostatic spray gun to spray different positions of the automobile wheel hub. The controller automatically controls the operation of the spray gun at each spraying position to realize automatic control of the painting process of the steel wheel, reduce the number of people on the production line, eliminate paint spraying positions, and reduce the risk of occupational health of operators. However, the assistance of the air spray gun cannot solve the Faraday effect well, and cannot improve the paint effect on the deep cavity or depression of the automobile wheel hub.

[0004] Therefore, in order to improve the painting effect of the metal hub and avoid the problem of uneven painting and poor coverage effect in the deep cavity or depression of the hub, a painting device for metal hub processing is proposed. Summary of the invention

[0005] The purpose of the present invention is to provide a paint spraying equipment for metal product processing. In order to avoid the Faraday effect during electrostatic spraying and prevent uneven paint spraying in the deep cavity or depression of the metal product hub, which affects the paint spraying quality and the paint spraying effect, a detachable shell baffle is installed on the outside of the electrostatic spray gun. When the electrostatic spray gun is extended into the inside of the hub for spraying, the shell baffle is blocked between the inner wall of the hub and the paint coating, so as to prevent the positive electric field of the inner wall of the hub from attracting the negatively charged paint coating sprayed by the electrostatic spray gun, so that the paint coating can be adsorbed on the deep cavity of the hub and the depression on the hub, thereby improving the feeding rate of the dead corner, thereby improving the uniformity of spraying and the paint spraying effect, and avoiding the secondary spraying step and improving production efficiency.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A paint spraying device for metal product processing includes: a baffle housing, a drive motor, an electrostatic spray gun, a circular buckle, a drive screw, and a screw nut. The drive motor is fixedly installed at the bottom of the circular buckle, the circular buckle is coaxially matched with the electrostatic spray gun, the drive screw is fixedly connected to the rotating shaft of the drive motor, the central axis of the drive screw is parallel to the central axis of the electrostatic spray gun, the screw nut is slidably installed on the drive screw, the bottom of the screw nut is fixedly connected to the baffle housing, and a circular slide groove is opened on the top of the screw nut, and the circular slide groove is slidably matched with the electrostatic spray gun.

[0008] By installing the baffle shell on the electrostatic spray gun, when the electrostatic spray gun is extended into the inner wall of the automobile wheel hub for painting, the shell is located between the electrostatic spray gun and the inner wall of the automobile wheel hub in the horizontal direction, and the baffle shell can change the shielding distance by driving the motor, so as to isolate the positive electric field of the outer edge of the inner wall of the automobile wheel hub, and avoid the positive electric field of this part to attract the negatively charged paint sprayed by the electrostatic spray gun, causing the paint particles to be attracted to the outside, so that the paint can enter the deep cavity and depression of the automobile wheel hub and adhere to it, avoiding the Faraday effect of painting, improving the painting effect and uniformity of the deep cavity and depression of the automobile wheel hub, and avoiding the need for secondary rework and spraying due to poor spraying effect at the first time, saving manpower and time costs, and improving production efficiency.

[0009] Preferably, a plurality of air holes are evenly arranged on one side of the baffle shell, the plurality of air holes are close to the nozzle of the electrostatic spray gun, a collecting chamber is provided inside the baffle shell, the collecting chamber and the air holes are located on the same side of the baffle shell, half of the space in the collecting chamber is connected to the outside air through the air holes, and an exhaust component is provided in the baffle shell, which cooperates with the air holes to complete exhaust when working.

[0010] By opening a plurality of evenly arranged air holes on the outer surface of the shell, and setting a collecting chamber inside the shell on the same side, so that half of the space in the collecting chamber is connected to the air holes, when the electrostatic spray gun is working, some of the paint cannot adhere to the target position due to the problem of jet pressure, and atomizes and floats in the air, causing waste of paint. If the number is too large, it will gather into paint droplets to form a hanging flow phenomenon, which affects the effect of painting. The multiple air holes opened on the shell can allow the paint that is not attached to the target position to enter the collecting chamber, and the collecting chamber can store the paint droplets to prevent the paint droplets from affecting the painting work. The collected paint can be recycled and processed for reuse, which improves the utilization rate of the paint while avoiding the hanging flow phenomenon that affects the painting work and improves the uniformity of the paint.

[0011] Preferably, the air extraction component includes a rotating motor, an air extraction screw, an air extraction nut, an air extraction block, a driving plate, a U-shaped plate, a driving spring, an air extraction chamber, and a limit block. The limit block is fixedly arranged on the inner wall of the shell, and a chamfer is arranged on the end of the limit block. The air extraction chamber is arranged on the inner wall of the baffle shell, and an air extraction port is opened on the top of the air extraction chamber. The air extraction port is communicated with the collecting chamber, and the U-shaped plate is arranged on the inner wall of the baffle shell. The rotating motor is fixedly installed in the inner cavity of the baffle shell, one end of the air extraction screw is fixedly connected to the rotating shaft of the rotating motor, and the other end passes through the U-shaped plate and is rotatably connected to the limit block. The air extraction nut slides with the air extraction screw, and the air extraction The air block is slidably mounted on the air extraction screw, and an air extraction plate is provided on one side of the air extraction block. The air extraction plate slidably cooperates with the air extraction chamber, and a slot is provided on the air extraction block. The driving spring is sleeved on the air extraction screw, and the left and right ends of the driving spring are respectively connected to the air extraction block and the U-shaped plate. The driving plate is rotatably mounted on the air extraction nut, and the driving plate as a whole is parallel to the inner wall of the baffle housing. A chamfer is provided on the end of the driving plate to cooperate with the chamfer of the limit block. A driving block is provided on the driving plate, and the driving block moves and cooperates with the slot of the air extraction block. A reset assembly is provided on the air extraction nut, and the reset assembly resets the driving block after the air extraction assembly completes its work.

[0012] The air extraction component is arranged in the baffle shell to improve the collection capacity of the baffle shell for spray paint. One end of the air extraction screw is fixedly connected to the rotating shaft of the rotating motor, and the other end passes through the U-shaped plate and is rotatably connected to the limit block. The air extraction block is installed on the air extraction screw and can slide left and right. The driving spring sleeve is arranged on the air extraction screw, and the U-shaped plate and the air extraction block are respectively connected on the left and right sides. The driving plate is arranged on the air extraction nut and the driving plate is provided with a driving block and a notch of the air extraction block. When the rotating motor drives the air extraction screw to rotate in the forward direction, the air extraction nut slides to the left, and at the same time drives the driving plate to slide to the left. At this time, the driving plate is in a horizontal state, the driving block is tightly attached to the notch of the air extraction block, and the driving plate drives the air extraction block to the left. The driving spring is in a stretched state, and the vacuum block moves to the left until the vacuum plate completely closes the vacuum chamber. The chamfer at the end of the driving plate contacts and cooperates with the chamfer of the limit block, and the driving plate and the limit block slide relative to each other. The driving plate rotates downward, and the driving block disengages from the notch of the vacuum block. Under the pulling force of the driving spring to the right, the vacuum block quickly returns to its initial position, and the vacuum plate is also extracted from the vacuum chamber. The vacuum chamber is connected to the collecting chamber through the vacuum port. At this time, the suction brought by the vacuum chamber enables the collecting chamber to better collect the wasted paint during the painting process, thereby improving the recycling rate of the paint. At the same time, it also avoids the excessive waste of paint that affects the overall quality of the paint and improves the paint effect.

[0013] Preferably, the reset assembly includes a sliding plate and a reset spring. The sliding plate is fixedly mounted on the vacuum nut. The sliding plate as a whole is parallel to the inner wall of the baffle housing. The upper and lower ends of the reset spring are respectively connected to the drive plate and the sliding plate. A chamfer is provided on one side of the vacuum block, and a chamfer is provided on one side of the drive block. The reset spring makes the chamfer of the vacuum block and the chamfer of the drive block slideably matched.

[0014] By arranging the reset component on the air extraction component, the upper and lower ends of the reset spring connect the driving plate and the sliding plate, and the thrust of the reset spring keeps the driving plate parallel to the inner wall of the baffle housing. When the end of the driving plate slides relative to the chamfer of the limit block, the reset spring is compressed. After the air extraction block returns to the initial position, the rotating motor reverses. At this time, the air extraction nut moves to the right, the reset spring extends, and after the driving plate moves a certain distance to the right, the chamfer of the driving block slides with the chamfer of the air extraction block. Under the action of the extrusion force, the driving plate rotates downward, and the reset spring is compressed again until the chamfer of the driving block leaves the chamfer of the air extraction block. Under the thrust of the reset spring, the driving block cooperates with the notch of the air extraction block again, and the reset component completes the reset. When the motor rotates forward, the air extraction work can be carried out. The reset component enables the air extraction component to quickly reset and repeat the air extraction work, thereby improving the working efficiency of the air extraction component and improving the effect of recycling spray paint.

[0015] Preferably, a closing component is provided inside the baffle shell, and the closing component includes a fixing rod, a beryllium copper strip, and a supporting port. A closing port is provided inside the vacuum chamber, and the closing port and the vacuum port are located on the same side. The fixing rod is fixedly provided on the inner wall of the baffle shell, and the supporting port is provided on the inner wall of the baffle shell. The beryllium copper strip is slidably matched with the supporting port, and one end of the beryllium copper strip is fixedly mounted on the vacuum block, and the other end bypasses the fixing rod, passes through the supporting port, and is located in the closing port.

[0016] Through the setting of the closing component, the beryllium copper belt slides with the vacuum block and opens or closes the vacuum chamber. The beryllium copper belt is a non-magnetic and durable spring sheet. One end of the beryllium copper belt is fixedly connected to the vacuum block, and the other end passes around the fixed rod and passes through the support port. The support port keeps the beryllium copper belt in a horizontal state. When the vacuum assembly is not working, the vacuum block is in the initial position, and the beryllium copper belt is located in the closed port of the vacuum chamber. The beryllium copper belt blocks and closes the vacuum port. When the transmission assembly starts to work, the vacuum assembly works at the same time, the vacuum block slides to the left, pulling the beryllium copper belt on one side to move to the left, and the beryllium copper belt The copper belt slides on the fixed rod, and the beryllium copper belt on the other side slides to the right, detaching from the closed port to open the vacuum chamber. When the vacuum assembly completes its work, the vacuum block is pulled back to the initial position by the driving spring, and the beryllium copper belt slides into the closed port at the same time to close the vacuum chamber. The closed component opens the vacuum chamber when the vacuum assembly is working to ensure the vacuum effect when the vacuum plate is detached from the vacuum chamber. After the vacuum plate completes the vacuuming, the vacuum port is covered to close the vacuum chamber to prevent the drawn paint from entering the inner cavity of the shell and the paint adhering to the inside of the mechanism affecting the normal operation of each component, thereby increasing the service life of the equipment.

[0017] Preferably, the circular buckle and the air hole are located on the same side, the inner radius of the circular buckle is 1-2mm larger than the radius of the electrostatic spray gun nozzle, the inner radius of the circular slide groove is 2-3mm larger than the radius of the electrostatic spray gun nozzle, and a locking opening is provided on the circular buckle, and the circular buckle locks the locking opening by means of bolts and nuts.

[0018] The baffle shell is placed on the electrostatic spray gun by setting a circular slide groove, the circular buckle is slidably connected to the electrostatic spray gun, and the locking mouth is locked with bolts and nuts to prevent the shell of the electrostatic spray gun from shaking or sliding during operation, affecting the normal operation of the electrostatic spray gun. The inner radius of the circular buckle is slightly larger than the electrostatic spray gun, so that the entire shell is easy to disassemble and clean, and the collected spray paint can be recycled, avoiding difficulty for staff to disassemble or install the shell, saving production time.

[0019] Preferably, two limit plates are symmetrically installed on the inner wall of the baffle housing, the two limit plates are located on opposite sides of the air hole, the two limit plates are parallel to the sliding plate, and the sliding plate slides between the two limit plates.

[0020] By setting a limit plate, the sliding plate is allowed to slide between the limit plates, which plays a limit guiding role when the lead screw nut drives the sliding plate to move, thereby preventing the sliding plate from shaking when the vacuum assembly is working and affecting the vacuum work, thereby improving the working stability of the vacuum assembly and improving the vacuum recovery effect of the spray paint.

[0021] Preferably, the upper surface of the air extraction plate is in contact with the outer surface of the supporting port, and the air extraction plate and the air extraction block are both made of solid self-lubricating material nylon.

[0022] By setting the exhaust plate and the exhaust block to be made of nylon, nylon has good wear resistance, the friction coefficient decreases with the increase of load, and is non-conductive. It is an excellent solid self-lubricating material, which reduces the friction resistance when the exhaust plate is exhausting and when the exhaust block and the exhaust screw are in relative motion, thereby improving the service life of the equipment.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. By moving the baffle shell and setting it on the electrostatic spray gun, the baffle shell isolates the positive electric field of the outer edge of the inner wall of the automobile wheel hub when the electrostatic spray gun is working, so that the spray paint enters the deep cavity and depression of the automobile wheel hub and adheres to it, avoiding the Faraday effect of spraying, improving the spraying effect and uniformity of the deep cavity and depression of the automobile wheel hub, and avoiding the need for secondary rework and spraying due to poor spraying effect in the first time, saving manpower and time costs, and improving production efficiency.

[0025] 2. By setting up a collection chamber and an exhaust component, the paint wasted in the electrostatic spray gun painting process is sucked into the air holes and stored in the collection chamber under the action of the exhaust component, avoiding excessive waste of paint to form droplets and preventing the paint droplets from affecting the painting work. The collected paint can be recycled and processed for reuse, which improves the utilization rate of the paint while avoiding the hanging flow phenomenon that affects the painting work, and improves the uniformity and quality of the paint.

[0026] 3. Through the setting of the closing component, the vacuum chamber is opened when the vacuum component is working to ensure the vacuum effect when the vacuum plate is separated from the vacuum chamber. The vacuum chamber is closed when the vacuum component is not working to prevent the drawn paint dust from entering the inner cavity of the shell and the paint from adhering to the inside of the mechanism, affecting the normal operation of each component and improving the service life of the equipment. The circular buckle connects the baffle shell to the electrostatic spray gun, making the shell easy to disassemble and clean while recycling the paint. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a working schematic diagram of the electrostatic spray gun of the present invention;

[0028] Figure 2 It is a schematic diagram of the overall structure of the present invention;

[0029] Figure 3 It is a schematic diagram of the movement of the baffle housing of the present invention;

[0030] Figure 4 It is a cutaway schematic diagram of the present invention;

[0031] Figure 5 is a cut-away side view of the present invention;

[0032] Figure 6 It is a schematic diagram of the working of the air extraction component of the present invention;

[0033] Figure 7 A schematic diagram of the driving block of the present invention leaving the notch;

[0034] Figure 8 It is a schematic diagram of the working of the reset component of the present invention.

[0035] In the figure: 1. baffle housing; 2. drive motor; 3. electrostatic spray gun; 4. circular buckle; 41. locking mouth; 5. drive screw; 6. screw nut; 61. circular slide groove; 7. air hole; 8. collecting chamber; 9. exhaust assembly; 91. rotating motor; 92. exhaust screw; 93. exhaust nut; 94. exhaust block; 941. notch; 942. exhaust plate; 95. drive plate; 951. drive block; 96. U-shaped plate; 97. drive spring; 98. exhaust chamber; 981. exhaust port; 982. closing port; 99. limit block; 10. closing assembly; 101. fixing rod; 102. beryllium copper strip; 103. supporting port; 11. reset assembly; 111. sliding plate; 112. reset spring; 12. limit plate; 13. automobile wheel hub. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] In the description of the present invention, it is necessary to understand that the terms "length", "inside", "up", "down", "left", "right", "horizontal", "one side", "vertical", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are 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 operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0038] See also Figures 1 to 4The present invention provides a painting equipment for metal product processing, and the technical solution is as follows:

[0039] The device is connected to the electrostatic spray gun 3 through a driving screw transmission. The driving motor 2 that drives the screw 5 to rotate is connected to the electrostatic spray gun 3 by being fixed on the circular buckle 4. The central axis of the driving screw 5 is parallel to the central axis of the electrostatic spray gun 3. The screw nut 6 slides with the driving screw 5. The baffle housing 1 is fixedly connected to the bottom of the screw nut 6. A circular slide groove 61 is provided on the top of the screw nut 6. The circular slide groove 61 slides with the electrostatic spray gun 3. The rotation of the driving screw 5 can drive the baffle housing 1 to move left and right in the horizontal direction. The electrostatic spray gun 3 will extend into the inner wall of the automobile wheel hub 13 when spraying paint. At this time, the baffle housing 1 is located between the inner wall of the wheel hub and the electrostatic spray gun in the horizontal direction. The baffle shell 1 blocks the positive electric field at the outer edge of the inner wall of the automobile wheel hub, preventing the negatively charged paint sprayed by the electrostatic spray gun 3 from being attracted by the positive charge, causing the paint particles to be attracted to the outside, avoiding the Faraday effect of the paint spraying, so that the paint sprayed by the electrostatic spray gun 3 can adhere to the deep cavity and depression of the automobile wheel hub 13, thereby improving the painting effect and uniformity of the deep cavity and depression of the automobile wheel hub 13, and avoiding the need for secondary rework and spraying due to poor spraying effect in the first time, saving manpower and time costs, and improving production efficiency; a plurality of air holes 7 are evenly arranged on one side of the top of the baffle shell 1, and the side where the air holes 7 are opened is close to the electrostatic spray gun 3 The nozzle has a collecting chamber 8 below the air hole 7, i.e., inside the baffle housing 1. Half of the space in the collecting chamber 8 is connected to the air hole 7, and the other half is a square storage space. When the electrostatic spray gun 3 is spraying paint, part of the paint cannot adhere to the target position of the paint due to the jet pressure problem, and the atomized paint floats in the air, causing waste of the paint. After a long time of spraying, the wasted paint will also gather into paint droplets to form a hanging flow phenomenon that affects the painting effect. The setting of the air hole 7 allows the wasted paint to enter the collecting chamber 8, and the collecting chamber 8 can store the paint droplets to prevent the paint droplets from affecting the painting work. The collected paint can be recycled and processed for reuse, thereby improving the utilization rate of the paint. At the same time, the hanging flow phenomenon is avoided to affect the painting work, and the uniformity of the painting is improved. The inner radius of the circular buckle 4 is 2 mm larger than the radius of the nozzle of the electrostatic spray gun 3, and the inner radius of the circular slide groove 61 is 3 mm larger than the radius of the nozzle of the electrostatic spray gun 3 and they are coaxially matched with the electrostatic spray gun 3. A locking port 41 is provided on the circular buckle 4. After the baffle housing 1 is installed on the electrostatic spray gun 3, the locking port 41 is locked with bolts and nuts to prevent the sliding and shaking of the baffle housing 1 when the electrostatic spray gun 3 is working, which affects the spraying work of the electrostatic spray gun 3. The setting of the circular buckle 4 is convenient for disassembling and cleaning the entire housing, and recycling the collected spray paint, avoiding the difficulty of disassembling or installing the housing for the staff, saving production time;

[0040] As an embodiment of the present invention, refer to Figures 1 to 8The air extraction component 9 includes a rotating motor 91, an air extraction screw 92, an air extraction nut 93, an air extraction block 94, a driving plate 95, a U-shaped plate 96, a driving spring 97, an air extraction chamber 98, and a limit block 99. One end of the air extraction screw 92 is fixedly connected to the rotating shaft of the rotating motor 91, and the other end passes through the U-shaped plate 96 and is rotatably connected to the limit block 99. The air extraction block 94 is installed on the air extraction screw 92 and can slide left and right. The limit block 99 is fixedly set on the inner wall of the shell, and a chamfer is set at the end of the limit block 99. An air extraction chamber 98 is set on the same side of the limit block 99. An air extraction port 981 is opened at the top of the air extraction chamber 98. The air extraction chamber 98 is connected to the collecting chamber 8 through the air extraction port 981. A rectangular closed port 982 is opened inside the air extraction chamber 98, and the closed port 982 is connected to the air extraction The air port 981 is located on the same side, and an air pumping plate 942 is provided on one side of the air pumping block 94. The air pumping plate 942 can fit tightly with the air pumping cavity 98. A notch 941 is provided on the air pumping block 94, and a chamfer is provided on the side on the same side as the notch 941. The driving spring 97 is sleeved on the air pumping screw 92, and the left and right ends are respectively connected to the U-shaped plate 96 and the air pumping block 94. One end of the driving plate 95 is rotatably mounted on the screw nut 6, and the driving plate 95 is parallel to the inner wall of the baffle housing 1 as a whole. The reset assembly 11 includes a sliding plate 111 and a reset spring 112. The sliding plate 111 is parallel to the driving plate 95 in a normal state. The upper and lower ends of the reset spring 112 connect the driving plate 95 to the sliding plate 111, and the other end of the driving plate 95 is provided with a chamfer. The chamfer of 95 can be slidably matched with the chamfer of the limit block 99, and a driving block 951 is fixedly arranged on the driving plate 95. One side of the driving block 951 is closely matched with the notch 941 of the air pumping block 94, and the other side is provided with a chamfer that can be matched with the chamfer of the air pumping block 94. When the rotating motor 91 rotates forward, the air pumping screw 92 rotates forward to make the air pumping nut 93 slide to the left, and the air pumping nut 93 drives the driving plate 95 to slide to the left. At this time, the driving block 951 is located in the notch 941 of the air pumping block 94, and the driving plate 95 drives the air pumping block 94 to move to the left. The driving spring 97 is stretched, and the air pumping block 94 moves leftward until the air pumping plate 942 completely closes the air pumping cavity 98. Then, the chamfer at the end of the driving plate 95 contacts and cooperates with the chamfer of the limit block 99, and the driving plate 95 and the limit block 9 9 produces relative sliding, the driving plate 95 rotates in the horizontal direction toward the side close to the sliding plate 111, the reset spring 112 is compressed, the driving block 951 is separated from the notch 941 of the air pumping block 94, and the air pumping block 94 quickly returns to the initial position under the pulling force of the driving spring 97. The air pumping plate 942 is drawn out of the air pumping cavity 98 and at the same time brings suction to the collecting cavity 8, absorbing the spray paint that has not been attached to the target position, thereby improving the recycling rate of the spray paint, and at the same time preventing the spray paint from gathering too much to form droplets that affect the overall quality of the spray paint, thereby improving the spray paint effect. After the air pumping block 94 returns to the initial position, the rotating motor 91 is reversed to move the air pumping nut 93 to the right, and at the same time the driving plate 95 moves to the right, and the port chamfer of the driving plate 95 leaves the chamfer of the limit block 99.The return spring 112 gives the driving plate 95 an upward thrust, and the driving plate 95 is restored to a state parallel to the sliding plate 111 after rotating. After the driving plate 95 slides to the right for a certain stroke, the chamfer of the driving block 951 slides in contact with the chamfer of the air pumping block 94. Under the extrusion force, the driving plate 95 rotates downward again, and the return spring 112 is compressed until the chamfer of the driving block 951 leaves the chamfer of the air pumping block 94. Under the thrust of the return spring 112, the driving block 951 cooperates with the notch 941 of the air pumping block 94 again, and the driving plate 95 is restored to a state parallel to the sliding plate 111. The motor rotates forward again to perform the air pumping work; two limit plates 1 are symmetrically installed on the inner wall of the baffle housing 1 2. The sliding plate 111 slides between the limiting plates 12, and plays a limiting and guiding role when the lead screw nut 6 drives the sliding plate 111 to move, so as to prevent the sliding plate 111 from shaking when the vacuum assembly 9 is working and affecting the vacuum work, thereby improving the working stability of the vacuum assembly 9 and the vacuum recovery effect of the spray paint. The vacuum plate 942 and the sliding plate 111 are made of nylon material. Nylon has good wear resistance, and the friction coefficient decreases with the increase of load. It is also non-conductive and is an excellent solid self-lubricating material. When the vacuum plate 942 is tightly matched with the vacuum cavity 98 and the sliding plate 111 is slidably matched with the sliding port, the friction resistance generated by the relative movement is reduced, thereby improving the service life of the equipment.

[0041] As an embodiment of the present invention, refer to Figures 1 to 8The closure assembly 10 includes a fixing rod 101, a beryllium copper strip 102, and a support opening 103. The fixing rod 101 is fixedly arranged on the inner wall of the housing, and its function is to make the beryllium copper strip 102 sleeved on the fixing rod 101 so that the beryllium copper strip 102 slides on the fixing rod 101. The support opening 103 is opened on the inner wall of the housing and is in the same horizontal plane as the locking opening. The beryllium copper strip 102 is a non-magnetic spring sheet with high elastic limit and fatigue limit. One end is fixedly connected to the pumping block 94 and moves with the movement of the pumping block 94, and the other end passes around the fixed rod 101 and passes through the support port 103. The support port 103 keeps the beryllium copper belt 102 in a horizontal state. When the pumping block 94 is in the initial position, one end of the beryllium copper belt 102 passing through the support port 103 is located in the closed port 982 of the pumping cavity 98. The beryllium copper belt 102 blocks and closes the pumping port 981. When the pumping assembly 9 starts working, the pumping The block 94 slides to the left, and the beryllium copper belt 102 on the side connected to the vacuum block 94 is pulled to the left. The middle part of the beryllium copper belt 102 slides on the fixed rod 101, and the beryllium copper belt 102 on the side of the closed port 982 slides to the right, detaches from the closed port 982 to open the vacuum chamber 98. When the vacuum assembly 9 completes its work, the vacuum block 94 is pulled back to the initial position by the driving spring 97, and the beryllium copper belt 102 on the side of the closed port 982 slides to the left into the closed port 982 to close the vacuum chamber 98. Through the linkage setting of the closed component 10 and the vacuum assembly 9, the vacuum chamber 98 is opened when the vacuum assembly 9 is working, ensuring the vacuum effect when the vacuum plate 942 is detached from the vacuum chamber 98. After the vacuum plate 942 completes the vacuuming, the vacuum port 981 is blocked to close the vacuum chamber 98 to prevent the drawn paint from entering the inner cavity of the shell and the paint adhering to the inside of the mechanism affecting the normal operation of each component, thereby improving the service life of the equipment.

[0042] Working principle: When the driving motor 2 rotates, it drives the driving screw 5 to rotate, the baffle housing 1 is fixedly connected to the screw nut 6, and the circular slide groove 61 of the screw nut 6 cooperates with the electrostatic spray gun 3. When the screw nut 6 moves left and right in the horizontal direction, it drives the baffle housing 1 to move left and right, changing the shielding area of ​​the baffle housing 1. At the same time, the rotating motor 91 rotates forward to make the air extraction nut 93 slide to the left, and the air extraction nut 93 drives the driving plate 95 and the sliding plate 111 to slide to the left. At this time, the driving block 951 is located in the notch 941 of the air extraction block 94, and the driving plate 95 carries The pumping block 94 moves to the left, and the pumping block 94 pulls the beryllium copper belt 102 to move. The beryllium copper belt 102 breaks away from the closed port 982 to open the pumping cavity 98. The driving spring 97 is stretched, and the pumping block 94 moves to the left until the pumping plate 942 completely closes the pumping cavity 98. The chamfer at the end of the driving plate 95 contacts and cooperates with the chamfer of the limit block 99, and the driving plate 95 and the limit block 99 slide relative to each other. The driving plate 95 rotates horizontally toward the side close to the sliding plate 111, the reset spring 112 is compressed, and the driving block 951 breaks away from the pumping The notch 941 of the air block 94, under the pulling force of the driving spring 97, the air pumping block 94 quickly returns to the initial position, the air pumping plate 942 is pulled out of the air pumping cavity 98, and the beryllium copper belt 102 slides to the left into the closed port 982 to close the air pumping cavity 98. After the air pumping block 94 returns to the initial position, the rotating motor 91 reverses to move the air pumping nut 93 to the right, and at the same time, the driving plate 95 and the sliding plate 111 move to the right, and the port chamfer of the driving plate 95 leaves the chamfer of the limit block 99. The reset spring 112 gives the driving plate 95 an upward thrust, and the driving plate 9 After the rotation, the driving plate 95 is restored to a state parallel to the sliding plate 111. After the driving plate 95 slides to the right for a certain distance, the chamfer of the driving block 951 slides in contact with the chamfer of the air pumping block 94. Under the force of the squeeze, the driving plate 95 is rotated downward again, and the return spring 112 is compressed until the chamfer of the driving block 951 leaves the chamfer of the air pumping block 94. Under the thrust of the return spring 112, the driving block 951 is matched with the notch 941 of the air pumping block 94 again, and the driving plate 95 is restored to a state parallel to the sliding plate 111. The motor rotates forward again to perform the air pumping work.

[0043] A specific embodiment of the present invention is described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above described embodiment. For those skilled in the art, various changes, modifications, substitutions and variations of these embodiments without departing from the principles and ideas of the present invention should still fall within the scope of protection of the present invention.

Claims

1. A paint spraying device for metal product processing, characterized in that: The invention comprises a baffle housing (1), a driving motor (2), an electrostatic spray gun (3), a circular buckle (4), a driving screw (5), and a screw nut (6), wherein the driving motor (2) is fixedly mounted on the bottom of the circular buckle (4), the circular buckle (4) is coaxially matched with the electrostatic spray gun (3), the driving screw (5) is fixedly connected to the rotating shaft of the driving motor (2), the central axis of the driving screw (5) is parallel to the central axis of the electrostatic spray gun (3), the screw nut (6) is slidably mounted on the driving screw (5), the bottom of the screw nut (6) is fixedly connected to the baffle housing (1), the baffle housing (1) is located between the inner wall of the automobile wheel hub (13) and the electrostatic spray gun (3), and a circular slide groove (61) is provided on the top of the screw nut (6), and the circular slide groove (61) is slidably matched with the electrostatic spray gun (3).

2. A paint spraying device for metal product processing according to claim 1, characterized in that: A plurality of air holes (7) are evenly arranged on one side of the baffle shell (1), and the plurality of air holes (7) are close to the nozzle of the electrostatic spray gun (3). A collecting chamber (8) is provided inside the baffle shell (1), and the collecting chamber (8) and the air holes (7) are located on the same side of the baffle shell (1). Half of the space inside the collecting chamber (8) is connected to the outside air through the air holes (7). An exhaust component (9) is provided inside the baffle shell (1), and the exhaust component (9) cooperates with the air holes (7) to complete exhaust when in operation.

3. A paint spraying device for metal product processing according to claim 2, characterized in that: The air extraction component (9) comprises a rotating motor (91), an air extraction screw (92), an air extraction nut (93), an air extraction block (94), a driving plate (95), a U-shaped plate (96), a driving spring (97), an air extraction cavity (98), and a limit block (99); the limit block (99) is fixedly arranged on the inner wall of the housing; the end of the limit block (99) is provided with a chamfer; the air extraction cavity (98) is arranged on the inner wall of the baffle housing (1); and the top of the air extraction cavity (98) is provided with an air extraction port. (981), the air extraction port (981) is connected to the collecting chamber (8), the U-shaped plate (96) is arranged on the inner wall of the baffle housing (1), the rotating motor (91) is fixedly installed in the inner cavity of the baffle housing (1), one end of the air extraction screw (92) is fixedly connected to the rotating shaft of the rotating motor (91), and the other end passes through the U-shaped plate (96) and is rotatably connected to the limit block (99), the air extraction nut (93) is slidably matched with the air extraction screw (92), and the air extraction block (94) is slidably connected to the air extraction screw (92). The vacuum pump (94) is installed on the vacuum screw (92), and a vacuum plate (942) is provided on one side of the vacuum block (94). The vacuum plate (942) is slidably matched with the vacuum chamber (98). A notch (941) is provided on the vacuum block (94). The drive spring (97) is sleeved on the vacuum screw (92). The left and right ends of the drive spring (97) are respectively connected to the vacuum block (94) and the U-shaped plate (96). The drive plate (95) is rotatably installed on the vacuum nut (93). The driving plate (95) is parallel to the inner wall of the baffle housing (1) as a whole; a chamfer is provided at the end of the driving plate (95) to cooperate with the chamfer of the limit block (99); a driving block (951) is provided on the driving plate (95); the driving block (951) is movably matched with the notch (941) of the air pumping block (94); a reset component (11) is provided on the air pumping nut (93); the reset component (11) resets the driving block (951) after the air pumping component (9) completes its work.

4. The paint spraying equipment for metal product processing according to claim 3, characterized in that: The reset assembly (11) comprises a sliding plate (111) and a reset spring (112). The sliding plate (111) is fixedly mounted on the air extraction nut (93). The sliding plate (111) is parallel to the inner wall of the baffle housing (1) as a whole. The upper and lower ends of the reset spring (112) are respectively connected to the drive plate (95) and the sliding plate (111). A chamfer is provided on one side of the air extraction block (94), and a chamfer is provided on one side of the drive block (951). The reset spring (112) enables the chamfer of the air extraction block (94) to slide with the chamfer of the drive block (951).

5. The paint spraying equipment for metal product processing according to claim 3, characterized in that: A sealing component (10) is arranged inside the baffle housing (1), and the sealing component (10) comprises a fixing rod (101), a beryllium copper strip (102), and a supporting opening (103). A sealing opening (982) is opened inside the air extraction cavity (98), and the sealing opening (982) and the air extraction opening (981) are located on the same side. The fixing rod (101) is fixedly arranged on the inner wall of the baffle housing (1), and the supporting opening (103) is opened on the inner wall of the baffle housing (1). The beryllium copper strip (102) and the supporting opening (103) are slidably matched. One end of the beryllium copper strip (102) is fixedly mounted on the air extraction block (94), and the other end bypasses the fixing rod (101), passes through the supporting opening (103), and is located in the sealing opening (982).

6. The paint spraying equipment for metal product processing according to claim 1, characterized in that: The circular buckle (4) and the air hole (7) are located on the same side, the inner radius of the circular buckle (4) is 1-2 mm larger than the radius of the nozzle of the electrostatic spray gun (3), the inner radius of the circular slide groove (61) is 2-3 mm larger than the radius of the nozzle of the electrostatic spray gun (3), and a locking opening (41) is provided on the circular buckle (4), and the locking opening (41) is locked by a bolt and nut.

7. The paint spraying equipment for metal product processing according to claim 4, characterized in that: Two limit plates (12) are symmetrically mounted on the inner wall of the baffle housing (1), the two limit plates (12) are located on opposite sides of the air hole (7), the two limit plates (12) are parallel to the sliding plate (111), and the sliding plate (111) slides between the two limit plates (12).

8. The paint spraying equipment for metal product processing according to claim 4, characterized in that: The upper surface of the air extraction plate (942) is in contact with the outer surface of the support opening (103), and the air extraction plate (942) and the air extraction block (94) are both made of solid self-lubricating material nylon.

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