A semi-automatic vacuum varnishing machine

Abstract

The present invention belongs to the field of vacuum varnish dipping machines, and specifically is a semi-automatic vacuum varnish dipping machine, comprising a varnish dipping tank, the top of which is open, the top of which is provided with an openable upper cover, the outer side of which is provided with a plurality of closed covers which can be raised and lowered and translated, the closed covers being through-through arranged up and down, the spaces enclosed by the inner circles of the plurality of closed covers being different, the outer side of the varnish dipping tank is provided with a paint storage tank for transferring paint liquid to the interior of the varnish dipping tank, through the setting of the closed cover, a suitable closed cover can be selected according to the size of the workpiece, the closed cover can be placed at the bottom of the varnish dipping tank, and the interior space of the closed cover can be made, through this setting, only a large-space varnish dipping tank is needed, which can be applied to a large number of workpieces with different volumes and shapes, and the processing process of the workpiece can be kept in a relatively short working time, and there is no need to prepare too much paint liquid.

Description

Technical Field

[0001] The invention belongs to the field of vacuum varnish dipping machines, in particular to a semi-automatic vacuum varnish dipping machine. Background Art

[0002] Vacuum dipping equipment, also known as vacuum impregnation machine, vacuum dipping machine, its principle is to place the workpiece to be processed in a vacuum container, through vacuuming, the moisture, air and other volatile substances in the workpiece are removed, and then the liquid material sufficient to cover the workpiece is injected into the vacuum container so that all gaps can be filled with material.

[0003] A patent application with publication number CN103611660A discloses a decontamination vacuum paint dipping tank and a paint dipping method, including a tank body, a tank cover matching the tank body, a paint delivery pipe, a bracket, a vacuum pump, a compressed air pipe and a filter screen, the bottom of the tank body is connected to the paint delivery pipe, the compressed air pipe is connected to the upper part of the tank body, the vacuum pump is connected to the upper part of the tank body, and the filter screen is arranged inside the tank body through the bracket; the decontamination vacuum paint dipping tank provided by the present invention can filter the insulating paint to prevent deteriorated paint and oil from entering the paint storage tank to contaminate the insulating paint; the paint dipping method provided by the present invention improves the uniformity of paint dipping and improves the quality of motor repair.

[0004] Traditional vacuum varnishing machines are generally integrated settings, and the internal space cannot be changed. However, when the vacuum varnishing machine is working, after the interior is evacuated to a vacuum, the paint liquid needs to be filled into the vacuum varnishing machine so that the paint liquid level is higher than the workpiece to ensure that the paint liquid can completely cover the surface and gaps of the workpiece. However, due to the large differences in the size and height of the workpieces, when a large-space device is processing a small-volume workpiece, the paint liquid needs to be injected into the large-space device and cover the bottom of the equipment, resulting in the amount of paint liquid injected far exceeding the required amount of the workpiece. Not only is the paint injection time and the paint liquid withdrawal time too long, but also a large amount of paint liquid needs to be prepared. If the factory prepares multiple equipment with different spaces, it not only takes up space but also has a high cost.

[0005] To this end, the present invention provides a semi-automatic vacuum varnish dipping machine. Summary of the invention

[0006] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0007] The technical solution adopted by the present invention to solve the technical problem is as follows: a semi-automatic vacuum paint dipping machine described in the present invention comprises a paint dipping tank, the top of the paint dipping tank is open, the top of the paint dipping tank is provided with an openable upper cover, the outer side of the paint dipping tank is provided with a plurality of closed covers that can be raised and lowered and translated, the closed covers are provided through-through from top to bottom, the spaces enclosed by the inner circles of the plurality of closed covers are different, the outer side of the paint dipping tank is provided with a paint storage tank for transferring paint liquid to the inside of the paint dipping tank, and the outer side of the paint dipping tank is also provided with a negative pressure machine for transferring negative pressure to the inside of the paint dipping tank;

[0008] By setting the enclosed hood, a suitable enclosed hood can be selected according to the size of the workpiece, and the enclosed hood can be placed at the bottom of the paint immersion tank. Then the workpiece is placed in the enclosed hood, and the bottom of the enclosed hood is fit with the bottom of the paint immersion tank. Then the upper cover is closed to make the internal space inside the enclosed hood, and the air inside the enclosed hood is evacuated by a negative pressure machine, and then the paint liquid is injected into the enclosed hood. Since the enclosed hood changes the bottom area of ​​the paint immersion tank, at this time, only an appropriate amount of paint liquid needs to be injected to completely immerse the workpiece. Through this setting, only a large-space paint immersion tank is needed to be suitable for a large number of workpieces with different volumes and shapes, and the processing process of the workpiece can be kept in a shorter working time, and there is no need to prepare too much paint liquid.

[0009] Preferably, the paint dipping tank and the enclosed cover are both cylindrically arranged, a sealing ring is installed between the upper cover and the paint dipping tank, and a sealing gasket adapted to multiple enclosed covers is installed at the bottom of the upper cover. Through the structural arrangement of the paint dipping tank and the enclosed cover, the enclosed cover can be fixedly placed in a concentric circle manner at the bottom center of the paint dipping tank, and paint dipping spaces with different bottom areas can be produced according to enclosed covers of different diameters, so that it can be suitable for workpieces of different sizes, which not only saves the time of vacuuming and painting, but also greatly reduces the paint that needs to be prepared.

[0010] Preferably, the plurality of the closure covers are sleeved with each other, the outer side of the closure cover is provided with a plurality of lifting and lowering restraining rings, the plurality of the restraining rings are sleeved with the outer sides of the plurality of closure covers respectively, a support frame is fixedly connected above the plurality of the restraining rings, a screw nut mechanism for driving the support frame to translate is provided above the support frame, a plurality of hydraulic rods for grabbing and releasing the closure covers are provided inside the support frame, the plurality of closure covers are sleeved with each other, the space occupied by the plurality of closure covers when the closure covers are not in use can be reduced, and when one of the closure covers needs to be used, the screw nut mechanism drives the restraining ring to move to Open the upper cover on the top of the paint immersion tank, then let the restraint ring sink into the paint immersion tank, let the bottom of all the enclosed covers contact with the bottom of the paint immersion tank first, release the enclosed covers of the required diameter by controlling the hydraulic rod, and then the restraint ring drives the remaining enclosed covers to rise and move away. When the enclosed covers need to be recovered, let the restraint ring sink into the paint immersion tank, control the hydraulic rod to grab and fix the enclosed covers, and then the entire restraint ring and the enclosed covers rise to complete the transfer. This setting ensures the stable sinking and release process of the enclosed covers, and will not cause impact damage to the bottom of the paint immersion tank when the enclosed covers are released due to their large mass.

[0011] Preferably, the multiple hydraulic rods are divided into two groups, the two groups of hydraulic rods are symmetrically arranged, and a support block is fixed between the ends of the multiple hydraulic rods in each group, the support block is slidably clamped in the inner ring of the restraining ring, and the outer side of the enclosed cover is fixedly connected with two symmetrically arranged outer convex frames. When it is necessary to release one of the enclosed covers, after the bottom of the enclosed cover is placed, the two groups of hydraulic rods at the corresponding positions are shortened to allow the support blocks to retract into the restraining ring. Thereafter, when the restraining ring rises, the enclosed cover will not be pulled upward together, and the enclosed cover will remain in the paint immersion tank; when the enclosed cover needs to be recovered, the two groups of hydraulic rods are extended to push out the support blocks, and the support blocks will lift the outer convex frames on both sides of the enclosed cover to lift and transfer the enclosed cover upward. Through this arrangement, the release and grasping of the enclosed cover are completed, and the grasping method is a supporting effect. Compared with friction grasping, it is less likely to lose the enclosed cover and it is also more firmly fixed.

[0012] Preferably, the negative pressure output end of the negative pressure machine is connected to the middle part of the top end of the upper cover, and the bottom of the paint storage tank is connected to the middle part of the bottom end of the paint dipping tank through a transmission tube 2. A solenoid valve is fixedly connected to the connection between the transmission tube 2 and the paint dipping tank. A transmission tube 1 is connected between the other negative pressure end of the negative pressure machine and the top of the paint storage tank. The transmission tube 2 is used for injecting and recovering the paint liquid. The paint liquid can be injected by gravity or by a built-in liquid pump. To utilize gravity, the paint storage tank needs to be installed above the paint dipping tank. The transmission tube 1 can transmit negative pressure to the paint storage tank to draw back the paint liquid. The solenoid valve controls the delivery of the paint liquid by opening and closing. Since the space formed by the closed cover is a concentric circle from the inside to the outside, the transmission of the negative pressure and the paint liquid are both transmitted from the top or bottom center of the paint dipping tank, ensuring that the negative pressure and the paint liquid can be smoothly transmitted to the inner circle of the closed cover.

[0013] Preferably, four winding seats 2 are fixedly connected to the bottom of the movable end of the screw nut mechanism, a reduction motor 1 is arranged on the inner side of the winding seat 2, a chain is wound around the output end of the reduction motor 1, the bottom of the chain is fixedly connected to the middle part of the support frame, and the four winding seats 2 are arranged equidistantly in a ring. Since the paint dipping tank is deep, in order to facilitate the lifting and lowering of the enclosure cover, the chain and the reduction motor 1 are used, and the reduction motor 1 is released and reeled in forward and reverse rotation to control the lifting and lowering of the support frame and the restraining ring, thereby controlling the lifting and lowering of the enclosure cover. Compared with the method of using a hydraulic telescopic rod, the volume occupied is smaller, and the four winding seats 2 are arranged equidistantly in a ring and have the same height, so that the four chains restrict each other, greatly reducing the swing of the lower parts.

[0014] Preferably, two symmetrically arranged snap-fit ​​plates are fixed to the outer side of the outermost restraint ring, and two symmetrically arranged alignment strips are fixed to the inner wall of the paint dipping tank. The outer side of the snap-fit ​​plates are provided with snap-fit ​​grooves adapted to the alignment strips. In order to ensure the concentric alignment of the enclosure cover, when the enclosure cover and the restraint ring are sunk into the paint dipping tank, the snap-fit ​​grooves on the outer side of the snap-fit ​​plates are combined with the alignment strips to ensure the accurate position of the overall restraint ring and ensure that the enclosure cover is in a predetermined position when it is finally placed.

[0015] Preferably, a plurality of interlocking grooves are provided on the bottom surface of the paint dipping tank, and the widths of the plurality of interlocking grooves are adapted to the bottom shape of the enclosing cover. The plurality of interlocking grooves form a stepped shape on the bottom surface of the paint dipping tank, the height of which gradually decreases from the outside to the inside. The arrangement of the interlocking grooves allows the bottom of the enclosing cover to be firmly assembled with the bottom of the paint dipping tank, and the enclosing cover will not be shifted due to negative pressure and paint liquid injection. The stepped shape formed by the plurality of interlocking grooves allows the paint liquid injected into the paint dipping tank to not be retained in the interlocking grooves, but to flow chaotically into the solenoid valve and the transmission pipe 2.

[0016] Preferably, an adjusting arm is provided on the top of the negative pressure machine, the rear end of the adjusting arm is connected to the negative pressure machine, the front end of the adjusting arm is fixedly connected to a docking valve, a transmission valve adapted to the docking valve is installed in the middle of the top surface of the upper cover, and a servo motor for driving the adjusting arm is installed on the outer side of the adjusting arm. The negative pressure of the negative pressure machine is transmitted to the docking valve through the adjusting arm. The drive of the servo motor can drive the adjusting arm to rotate, so that the docking valve and the transmission valve are docked to complete the transmission of negative pressure. When the upper cover needs to be opened, the adjusting arm can rotate in the opposite direction and away from the upper cover so that the upper cover can be opened normally.

[0017] Preferably, a support platform is fixedly connected to the outer side of the paint dipping tank, a bending arm is rotatably connected to the outer side of the support platform, the transmission valve of the upper cover is fixedly connected to the end of the bending arm, and a winding seat 1 is fixedly connected to the outer side of the paint dipping tank, and the winding seat 1 is located below the support platform. A reduction motor 2 is installed inside the winding seat 1, and a steel cable is fixedly connected to the output end of the reduction motor 2, and the free end of the steel cable is fixedly connected to the outer end of the bending arm. By winding the steel cable with the reduction motor 2, the bending arm can be pulled to complete the process of controlling the opening of the upper cover. Through this arrangement combined with the drive of the adjustment arm, most of the operations of the paint dipping tank are mechanized, reducing manual adjustments and operations.

[0018] The beneficial effects of the present invention are as follows:

[0019] 1. The semi-automatic vacuum paint dipping machine described in the present invention can select a suitable closed cover according to the size of the workpiece through the setting of the closed cover, and put the closed cover into the bottom of the paint dipping tank, then put the workpiece into the closed cover, let the bottom of the closed cover fit with the bottom of the paint dipping tank, and then close the upper cover to make the internal space inside the closed cover, evacuate the air inside the closed cover by a negative pressure machine, and then inject paint liquid into the closed cover. Since the closed cover changes the bottom area of ​​the paint dipping tank, at this time, only an appropriate amount of paint liquid needs to be injected to completely immerse the workpiece. Through this setting, only a large-space paint dipping tank is needed to be suitable for a large number of workpieces with different volumes and shapes, and the processing process of the workpiece can be kept in a shorter working time, and there is no need to prepare too much paint liquid.

[0020] 2. The semi-automatic vacuum varnish dipping machine described in the present invention, through the structural arrangement of the varnish dipping tank and the enclosed cover, allows the enclosed cover to be fixedly placed at the bottom center of the varnish dipping tank in a concentric circle manner, and varnish dipping spaces with different bottom areas are produced according to the enclosed covers of different diameters, so that it can be suitable for workpieces of different sizes, which not only saves the time of vacuuming and painting, but also greatly reduces the paint that needs to be prepared. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described below in conjunction with the accompanying drawings.

[0022] Figure 1 It is a perspective view of the present invention.

[0023] Figure 2 It is a three-dimensional diagram of the paint dipping tank and the paint storage tank of the present invention.

[0024] Figure 3 It is the internal schematic diagram of the paint dipping tank of the present invention.

[0025] Figure 4 It is a cross-sectional view of a paint dipping tank of the present invention.

[0026] Figure 5 It is a three-dimensional diagram of a paint storage can of the present invention.

[0027] Figure 6 It is a three-dimensional view of the trap cover of the present invention.

[0028] Figure 7 It is a three-dimensional diagram of the restraining ring of the present invention.

[0029] In the figure: 1. paint dipping tank; 2. paint storage tank; 3. closure cover; 4. screw nut mechanism; 5. sealing ring; 6. upper cover; 7. transmission pipe 1; 8. adjustment arm; 9. docking valve; 10. bending arm; 11. support platform; 12. winding seat 1; 13. alignment strip; 14. fitting groove; 15. transmission pipe 2; 16. solenoid valve; 17. servo motor; 18. negative pressure machine; 19. winding seat 2; 20. chain; 21. support frame; 22. external convex frame; 23. restraining ring; 24. hydraulic rod; 25. clamping plate; 26. steel cable. DETAILED DESCRIPTION

[0030] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0031] like Figures 1 to 6 As shown, a semi-automatic vacuum paint dipping machine according to an embodiment of the present invention comprises a paint dipping tank 1, the top of the paint dipping tank 1 is open, the top of the paint dipping tank 1 is provided with an openable upper cover 6, the outer side of the paint dipping tank 1 is provided with a plurality of closed covers 3 that can be raised and lowered and translated, the closed covers 3 are arranged through-through from top to bottom, and the spaces enclosed by the inner circles of the plurality of closed covers 3 are different, the outer side of the paint dipping tank 1 is provided with a paint storage tank 2 for transferring paint liquid to the inside of the paint dipping tank 1, and the outer side of the paint dipping tank 1 is also provided with a negative pressure machine 18 for transferring negative pressure to the inside of the paint dipping tank 1;

[0032] When the workpiece is a slender tubular object, or a small workpiece with a small length and height, when processing such a workpiece, the workpiece is directly placed in the paint dipping tank 1. Since the bottom area of ​​the paint dipping tank 1 is large, the paint liquid needs to fill the bottom surface of the paint dipping tank 1 first, resulting in the amount of paint injected far exceeding the required amount of the workpiece, resulting in too long a time for injection and withdrawal of paint liquid, and more paint liquid needs to be prepared;

[0033] By setting the enclosed cover 3, a suitable enclosed cover 3 can be selected according to the size of the workpiece, and the enclosed cover 3 can be placed at the bottom of the paint immersion tank 1. Then the workpiece is placed in the enclosed cover 3, and the bottom of the enclosed cover 3 is fitted with the bottom of the paint immersion tank 1. Then the upper cover 6 is closed to make the internal space inside the enclosed cover 3. The air inside the enclosed cover 3 is evacuated by the negative pressure machine 18, and then the paint liquid is injected into the enclosed cover 3. Since the enclosed cover 3 changes the bottom area of ​​the paint immersion tank 1, at this time, only an appropriate amount of paint liquid needs to be injected to completely immerse the workpiece. Through this setting, only a large-space paint immersion tank 1 is needed to be suitable for a large number of workpieces with different volumes and shapes, and the processing process of the workpiece can be kept in a shorter working time, and there is no need to prepare too much paint liquid.

[0034] like Figures 1 to 6 As shown, the paint dipping tank 1 and the enclosed cover 3 are both cylindrically arranged, a sealing ring 5 is installed between the upper cover 6 and the paint dipping tank 1, and a sealing gasket adapted to the multiple enclosed covers 3 is installed at the bottom of the upper cover 6;

[0035] During operation, through the structural setting of the paint immersion tank 1 and the enclosed cover 3, the enclosed cover 3 can be fixedly placed at the bottom center position of the paint immersion tank 1 in a concentric circle manner. According to the enclosed covers 3 of different diameters, paint immersion spaces with different bottom areas are produced, so that it can be suitable for workpieces of different sizes, which not only saves the time of vacuuming and painting, but also greatly reduces the paint that needs to be prepared.

[0036] like Figures 1 to 7 As shown, the plurality of the enclosed covers 3 are mutually sleeved, and the outer side of the enclosed covers 3 is provided with a plurality of lifting and lowering restraining rings 23, and the plurality of the restraining rings 23 are respectively sleeved on the outer sides of the plurality of the enclosed covers 3, and a support frame 21 is fixedly connected above the plurality of the restraining rings 23, and a lead screw nut mechanism 4 for driving the support frame 21 to translate is provided above the support frame 21, and a plurality of hydraulic rods 24 for grabbing and releasing the enclosed covers 3 are provided inside the support frame 21;

[0037] When working, multiple enclosed covers 3 are connected to each other, which can reduce the space occupied by multiple enclosed covers 3 when they are not in use. When one of the enclosed covers 3 needs to be used, the screw nut mechanism 4 drives the restraining ring 23 to move to the top of the paint immersion tank 1, opens the upper cover 6, and then allows the restraining ring 23 to sink into the paint immersion tank 1, so that the bottoms of all the enclosed covers 3 first contact with the bottom of the paint immersion tank 1, and releases the enclosed covers 3 of the required diameter by controlling the hydraulic rod 24. Then the restraining ring 23 drives the remaining enclosed covers 3 to rise and move away. When the enclosed cover 3 needs to be recovered, the restraining ring 23 is sunk into the paint immersion tank 1, and the hydraulic rod 24 is controlled to grab and fix the enclosed cover 3. Then the entire restraining ring 23 and the enclosed cover 3 rise to complete the transfer. This arrangement ensures the stable sinking and release process of the enclosed cover 3, and will not cause impact damage to the bottom of the paint immersion tank 1 when the enclosed cover 3 is released due to its large mass.

[0038] like Figures 1 to 7 As shown, the plurality of hydraulic rods 24 are divided into two groups, and the two groups of hydraulic rods 24 are symmetrically arranged. A support block is fixed between the ends of the plurality of hydraulic rods 24 in each group, and the support block is slidably clamped on the inner ring of the restraining ring 23. The outer side of the enclosed cover 3 is fixedly connected to two symmetrically arranged outer convex frames 22;

[0039] During operation, when it is necessary to release one of the enclosed covers 3, after the bottom of the enclosed cover 3 is placed, the two groups of hydraulic rods 24 at the corresponding positions are shortened to allow the support block to retract into the restraining ring 23. Then, when the restraining ring 23 rises, the enclosed cover 3 will not be pulled upward together, and the enclosed cover 3 will remain in the paint dipping tank 1; when it is necessary to recover the enclosed cover 3, the two groups of hydraulic rods 24 are extended to push out the support blocks, and the support blocks will lift the outer protrusions 22 on both sides of the enclosed cover 3 to lift and transfer the enclosed cover 3 upward. Through this arrangement, the release and grasping of the enclosed cover 3 are completed, and the grasping method is a supporting effect. Compared with the friction grasping, it is less likely to lose the enclosed cover 3 and it is also more firmly fixed.

[0040] like Figures 1 to 7 As shown, the negative pressure output end of the negative pressure machine 18 is connected to the middle of the top of the upper cover 6, the bottom of the paint storage tank 2 is connected to the middle of the bottom end of the paint dipping tank 1 through the transmission pipe 2 15, the connection between the transmission pipe 2 15 and the paint dipping tank 1 is fixedly connected with a solenoid valve 16, and the other negative pressure end of the negative pressure machine 18 is connected to the top of the paint storage tank 2 with a transmission pipe 1 7;

[0041] During operation, the transmission pipe 2 15 is used to inject and recover the paint liquid. The paint liquid can be injected by gravity or by a built-in liquid pump. To utilize gravity, the paint storage tank 2 needs to be installed above the paint immersion tank 1. The transmission pipe 1 7 can transmit negative pressure to the paint storage tank 2 to allow the paint liquid to be withdrawn. The solenoid valve 16 controls the delivery of the paint liquid by opening and closing. Since the space formed by the enclosed cover 3 is a concentric circle from the inside to the outside, the transmission of the negative pressure and the paint liquid are both transmitted from the top or bottom center of the paint immersion tank 1, ensuring that the negative pressure and the paint liquid can be smoothly transmitted to the inner circle of the enclosed cover 3.

[0042] like Figures 1 to 7 As shown, four winding seats 2 19 are fixedly connected to the bottom of the moving end of the screw nut mechanism 4, a reduction motor 1 is arranged inside the winding seat 2 19, a chain 20 is wound around the output end of the reduction motor 1, and the bottom of the chain 20 is fixedly connected to the middle of the support frame 21, and the four winding seats 2 19 are arranged equidistantly in a ring shape;

[0043] During operation, due to the deepness of the paint dipping tank 1, in order to facilitate the lifting and lowering of the enclosure cover 3, a chain 20 and a reduction motor 1 are used. The reduction motor 1 releases and rewinds the chain 20 in forward and reverse rotation to control the lifting and lowering of the support frame 21 and the restraining ring 23, thereby controlling the lifting and lowering of the enclosure cover 3. Compared with the method of using a hydraulic telescopic rod, the volume occupied is smaller. At the same time, the four rewinding seats 19 are arranged equidistantly in a ring and have the same height. In this way, the four chains 20 restrict each other, greatly reducing the swing of the lower parts.

[0044] like Figures 1 to 7 As shown, the outer side of the restraining ring 23 located at the outermost side is fixedly connected with two symmetrically arranged clamping plates 25, and the inner wall of the paint dipping tank 1 is fixedly connected with two symmetrically arranged alignment strips 13, and the outer side of the clamping plate 25 is provided with a clamping groove adapted to the alignment strip 13;

[0045] During operation, in order to ensure the concentric alignment of the enclosed cover 3, when the enclosed cover 3 and the restraining ring 23 sink into the paint dipping tank 1, the engaging groove on the outer side of the engaging plate 25 is combined with the alignment strip 13 to ensure the accurate position of the overall restraining ring 23, and ensure that the enclosed cover 3 is in the predetermined position when finally placed.

[0046] like Figures 1 to 7 As shown, a plurality of fitting grooves 14 are provided on the bottom surface of the paint dipping tank 1, and the width of the plurality of fitting grooves 14 is adapted to the bottom shape of the enclosed cover 3, and the plurality of fitting grooves 14 form a step-like shape with a height gradually decreasing from the outside to the inside on the bottom surface of the paint dipping tank 1;

[0047] During operation, the arrangement of the interlocking grooves 14 allows the bottom of the enclosed cover 3 to be firmly assembled with the bottom of the paint dipping tank 1, and the enclosed cover 3 will not be shifted due to negative pressure and paint liquid injection. The stepped shape formed by the multiple interlocking grooves 14 can prevent the paint liquid injected into the paint dipping tank 1 from being retained in the interlocking grooves 14, but will flow chaotically into the solenoid valve 16 and the transmission pipe 15.

[0048] like Figures 1 to 7 As shown, an adjusting arm 8 is provided on the top of the negative pressure machine 18, the rear end of the adjusting arm 8 is connected to the negative pressure machine 18, a docking valve 9 is fixedly connected to the front end of the adjusting arm 8, a transmission valve adapted to the docking valve 9 is installed in the middle of the top surface of the upper cover 6, and a servo motor 17 for driving the adjusting arm 8 is installed on the outer side of the adjusting arm 8;

[0049] During operation, the negative pressure of the negative pressure machine 18 is transmitted to the docking valve 9 through the adjusting arm 8. The drive of the servo motor 17 can drive the adjusting arm 8 to rotate, so that the docking valve 9 and the transmission valve are docked to complete the transmission of negative pressure. When the upper cover 6 needs to be opened, the adjusting arm 8 can rotate in the opposite direction and move away from the upper cover 6 so that the upper cover 6 can be opened normally.

[0050] like Figures 1 to 7 As shown, a support platform 11 is fixedly connected to the outside of the paint dipping tank 1, a bending arm 10 is rotatably connected to the outside of the support platform 11, a transmission valve of the upper cover 6 is fixedly connected to the end of the bending arm 10, a winding seat 12 is fixedly connected to the outside of the paint dipping tank 1, the winding seat 12 is located below the support platform 11, a reduction motor 2 is installed inside the winding seat 12, a steel cable 26 is fixedly connected to the output end of the reduction motor 2, and a free end of the steel cable 26 is fixedly connected to the outer end of the bending arm 10;

[0051] During operation, the steel cable 26 is wound up by the second reduction motor to pull the bending arm 10 to complete the process of controlling the opening of the upper cover 6. This arrangement combined with the drive of the adjustment arm 8 makes most of the operations of the paint dipping tank 1 mechanized, reducing manual adjustments and operations.

[0052] During operation, through the setting of the enclosed cover 3, a suitable enclosed cover 3 can be selected according to the size of the workpiece, and the enclosed cover 3 can be placed at the bottom of the paint immersion tank 1, and then the workpiece is placed in the enclosed cover 3, so that the bottom of the enclosed cover 3 fits with the bottom of the paint immersion tank 1, and then the upper cover 6 is closed to make the internal space inside the enclosed cover 3, and the air inside the enclosed cover 3 is evacuated by the negative pressure machine 18, and then the paint liquid is injected into the enclosed cover 3. Since the enclosed cover 3 changes the bottom area of ​​the paint immersion tank 1, at this time, only an appropriate amount of paint liquid needs to be injected to completely immerse the workpiece. Through this setting, only a large-space paint immersion tank 1 is needed to be suitable for a large number of workpieces with different volumes and shapes, and the processing process of the workpiece can be kept in a short working time, and there is no need to prepare too much paint liquid;

[0053] Through the structural setting of the paint immersion tank 1 and the enclosed cover 3, the enclosed cover 3 can be fixedly placed at the bottom center of the paint immersion tank 1 in a concentric circle manner. According to the enclosed covers 3 of different diameters, paint immersion spaces with different bottom areas are produced, so that they can be suitable for workpieces of different sizes, which not only saves the time of vacuuming and painting, but also greatly reduces the paint that needs to be prepared;

[0054] The plurality of enclosed covers 3 are connected to each other, which can reduce the space occupied by the plurality of enclosed covers 3 when they are not in use. When one of the enclosed covers 3 needs to be used, the screw nut mechanism 4 drives the restraining ring 23 to move to the top of the paint immersion tank 1, opens the upper cover 6, and then allows the restraining ring 23 to sink into the paint immersion tank 1, so that the bottoms of all the enclosed covers 3 first contact with the bottom of the paint immersion tank 1, and releases the enclosed covers 3 of the required diameter by controlling the hydraulic rod 24, and then the restraining ring 23 drives the remaining enclosed covers 3 to rise and move away. When the enclosed covers 3 need to be recovered, the restraining ring 23 is allowed to sink into the paint immersion tank 1, and the hydraulic rod 24 is controlled to grab and fix the enclosed covers 3, and then the entire restraining ring 23 and the enclosed covers 3 are raised to complete the transfer. This arrangement ensures the stable sinking and release process of the enclosed covers 3, and will not cause the enclosed covers 3 to cause impact damage to the bottom of the paint immersion tank 1 when releasing the enclosed covers 3 due to their large mass;

[0055] When it is necessary to release one of the enclosed covers 3, after the bottom of the enclosed cover 3 is placed, the two groups of hydraulic rods 24 at the corresponding positions are shortened to allow the support block to retract into the restraining ring 23. Then, when the restraining ring 23 rises, the enclosed cover 3 will not be pulled upward together, and the enclosed cover 3 will remain in the paint dipping tank 1. When it is necessary to recover the enclosed cover 3, the two groups of hydraulic rods 24 are extended to push out the support blocks, and the support blocks will lift the outer convex frames 22 on both sides of the enclosed cover 3 to lift and transfer the enclosed cover 3 upward. Through this arrangement, the release and grasping of the enclosed cover 3 are completed, and the grasping method is the supporting effect. Compared with the friction grasping, it is less likely to lose the enclosed cover 3 and it is also more firmly fixed.

[0056] The transmission pipe 2 15 is used to inject and recover the paint liquid. The way to inject the paint liquid can be gravity or a built-in liquid pump. To use gravity, the paint storage tank 2 needs to be installed above the paint immersion tank 1. The transmission pipe 1 7 can transmit negative pressure to the paint storage tank 2 to allow the paint liquid to be withdrawn. The solenoid valve 16 controls the delivery of the paint liquid by opening and closing. Since the space formed by the enclosed cover 3 is a concentric circle from the inside to the outside, the transmission of the negative pressure and the transmission of the paint liquid are all transmitted from the top or bottom center of the paint immersion tank 1, ensuring that the negative pressure and the paint liquid can be smoothly transmitted to the inner circle of the enclosed cover 3;

[0057] Since the depth of the paint dipping tank 1 is relatively deep, in order to facilitate the lifting and lowering of the enclosed cover 3, the chain 20 and the reduction motor 1 are used. The reduction motor 1 rotates forward and reversely to release and reel in the chain 20 to control the lifting and lowering of the support frame 21 and the restraining ring 23, thereby controlling the lifting and lowering of the enclosed cover 3. Compared with the method of using a hydraulic telescopic rod, the volume occupied is smaller. At the same time, the four reeling seats 19 are arranged in an equidistant manner in a ring and have the same height, so that the four chains 20 restrict each other, greatly reducing the swing of the lower parts;

[0058] In order to ensure the concentric alignment of the enclosed cover 3, when the enclosed cover 3 and the restraining ring 23 are sunk into the paint dipping tank 1, the clamping groove on the outer side of the clamping plate 25 is combined with the alignment strip 13 to ensure the accurate position of the overall restraining ring 23, and ensure that the enclosed cover 3 is in the predetermined position when finally placed;

[0059] The arrangement of the interlocking groove 14 allows the bottom of the enclosed cover 3 to be firmly assembled with the bottom of the paint immersion tank 1, and the enclosed cover 3 will not be displaced due to negative pressure and paint liquid injection. The stepped shape formed by the multiple interlocking grooves 14 can prevent the paint liquid injected into the paint immersion tank 1 from being retained in the interlocking groove 14, but will flow chaotically into the solenoid valve 16 and the second transmission pipe 15;

[0060] The negative pressure of the negative pressure machine 18 is transmitted to the docking valve 9 through the adjustment arm 8. The drive of the servo motor 17 can drive the adjustment arm 8 to rotate, so that the docking valve 9 and the transmission valve are docked to complete the transmission of negative pressure. When the upper cover 6 needs to be opened, the adjustment arm 8 can rotate in the opposite direction and move away from the upper cover 6, so that the upper cover 6 can be opened normally.

[0061] By winding up the steel cable 26 of the second reduction motor, the bending arm 10 can be pulled to complete the process of controlling the opening of the upper cover 6. Through this arrangement combined with the drive of the adjustment arm 8, most of the operations of the paint dipping tank 1 are mechanized, reducing manual adjustment and operation.

[0062] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A semi-automatic vacuum varnishing machine, characterized in that: The paint tank (1) comprises a paint dipping tank (1), wherein the top of the paint dipping tank (1) is open, and the top of the paint dipping tank (1) is provided with an openable upper cover (6), and the outer side of the paint dipping tank (1) is provided with a plurality of closed covers (3) that can be raised and lowered and translated, and the closed covers (3) are arranged to be through-connected from top to bottom, and the spaces enclosed by the inner circles of the plurality of closed covers (3) are different, and the outer side of the paint dipping tank (1) is provided with a paint storage tank (2) for transferring paint liquid to the inside of the paint dipping tank (1), and the outer side of the paint dipping tank (1) is also provided with a negative pressure machine (18) for transferring negative pressure to the inside of the paint dipping tank (1); The paint dipping tank (1) and the enclosed cover (3) are both cylindrically arranged, a sealing ring (5) is installed between the upper cover (6) and the paint dipping tank (1), and a sealing gasket adapted to the plurality of enclosed covers (3) is installed at the bottom of the upper cover (6); The plurality of confinement covers (3) are mutually sleeved, and the outer side of the confinement covers (3) is provided with a plurality of lifting and lowering restraining rings (23), and the plurality of restraining rings (23) are respectively sleeved on the outer sides of the plurality of confinement covers (3), and a support frame (21) is fixedly connected above the plurality of restraining rings (23), and a screw nut mechanism (4) for driving the support frame (21) to translate is provided above the support frame (21), and a plurality of hydraulic rods (24) for grabbing and releasing the confinement covers (3) are provided inside the support frame (21).

2. A semi-automatic vacuum dipping machine according to claim 1, characterized in that: The plurality of hydraulic rods (24) are divided into two groups, the two groups of hydraulic rods (24) are symmetrically arranged, a support block is fixedly connected between the ends of the plurality of hydraulic rods (24) in each group, the support block is slidably engaged with the inner ring of the restraining ring (23), and the outer side of the confinement cover (3) is fixedly connected with two symmetrically arranged outer convex frames (22).

3. A semi-automatic vacuum dipping machine according to claim 2, characterized in that: The negative pressure output end of the negative pressure machine (18) is connected to the middle of the top end of the upper cover (6), the bottom of the paint storage tank (2) is connected to the middle of the bottom end of the paint dipping tank (1) through the second transmission pipe (15), and the connection between the second transmission pipe (15) and the paint dipping tank (1) is fixedly connected with a solenoid valve (16), and the other negative pressure end of the negative pressure machine (18) is connected to the top of the paint storage tank (2) with the first transmission pipe (7).

4. A semi-automatic vacuum dipping machine according to claim 3, characterized in that: Four winding seats (2) (19) are fixedly connected to the bottom of the movable end of the screw nut mechanism (4), a reduction motor (1) is arranged inside the winding seat (2) (19), a chain (20) is wound around the output end of the reduction motor (1), the bottom of the chain (20) is fixedly connected to the middle of the support frame (21), and the four winding seats (19) are arranged in a circular shape with equal spacing.

5. A semi-automatic vacuum varnishing machine according to claim 4, characterized in that: Two symmetrically arranged snap-fit ​​plates (25) are fixedly connected to the outer side of the restraining ring (23) located at the outermost side, and two symmetrically arranged alignment strips (13) are fixedly connected to the inner wall of the paint dipping tank (1), and snap-fit ​​grooves adapted to the alignment strips (13) are provided on the outer side of the snap-fit ​​plates (25).

6. A semi-automatic vacuum varnishing machine according to claim 5, characterized in that: A plurality of engaging grooves (14) are provided on the bottom surface of the paint dipping tank (1), the width of the plurality of engaging grooves (14) being adapted to the bottom shape of the enclosed cover (3), and the plurality of engaging grooves (14) are formed on the bottom surface of the paint dipping tank (1) in a stepped shape with the height gradually decreasing from the outside to the inside.

7. A semi-automatic vacuum varnishing machine according to claim 6, characterized in that: An adjusting arm (8) is arranged on the top of the negative pressure machine (18), the rear end of the adjusting arm (8) is connected to the negative pressure machine (18), the front end of the adjusting arm (8) is fixedly connected to a docking valve (9), a transmission valve adapted to the docking valve (9) is installed in the middle of the top surface of the upper cover (6), and a servo motor (17) for driving the adjusting arm (8) is installed on the outer side of the adjusting arm (8).

8. A semi-automatic vacuum varnishing machine according to claim 7, characterized in that: The outer side of the paint dipping tank (1) is fixedly connected to a support platform (11), the outer side of the support platform (11) is rotatably connected to a bending arm (10), the transmission valve of the upper cover (6) is fixedly connected to the end of the bending arm (10), the outer side of the paint dipping tank (1) is fixedly connected to a winding seat (12), the winding seat (12) is located below the support platform (11), a reduction motor (2) is installed inside the winding seat (12), the output end of the reduction motor (2) is fixedly connected to a steel cable (26), and the free end of the steel cable (26) is fixedly connected to the outer end of the bending arm (10).

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