CN110694821A - Lacquer coating production line for door panel - Google Patents

Abstract

The invention relates to the technical field of flow coating equipment, and specifically discloses a paint flow coating production line on a door panel, which includes a frame, a conveyor belt, a grinding unit, a negative pressure unit and a flow coating unit, and also includes adhesion between the negative pressure unit and the flow coating unit. unit, the adhesive unit includes a driver, an adhesive belt and several infusion rollers, the driver drives the infusion roller to rotate, the adhesive belt is made of fabric, and the adhesive belt is sleeved on the infusion roller; the infusion roller is provided with a cavity, the cavity There is a solution inside, a circulation channel is arranged on the infusion roller, the circulation channel is communicated with the cavity, a blocking block is slidably connected on the circulation channel, and an elastic piece is connected between the other end of the blocking block and the inner wall corresponding to the circulation channel; There is a flow groove connecting the outside world with the cavity, and the blocking block can block the flow groove. This solution is used to solve the problem that the wood chips adhere to the door panel and affect the appearance quality of the door panel due to incomplete adsorption of the polished wood chips by means of negative pressure adsorption in the prior art.

Description

Lacquer coating production line for door panel

technical field

The invention relates to the technical field of spray coating equipment, in particular to a paint spray coating production line for door panels.

Background technique

The door panel made of sheet needs to be polished, sprayed and leveled. After leveling, it can be formed by natural drying or drying. In the production of door panel, the condition of the surface of the sheet after grinding is related to the uniformity of the subsequent coating of the sheet. And the quality of paint leveling, in order to facilitate the control of the quality of the door panel, the continuous operation of grinding and spray coating is generally carried out.

In the prior art, after the board is polished, negative pressure is generally used to suck the polished wood chips away from the board. However, the negative pressure adsorption method is often not completely absorbed, and the tiny wood chips and dust adhere to the board, so that the Sawdust or dust floats on the paint during the subsequent flow coating process of the panel, and finally adheres to the door panel.

In addition, in the prior art, in order to ensure that the same batch of plates can be quickly spray-coated, generally after the last plate is spray-coated, the machine will not be shut down alone to wait for the arrival of the next plate before starting the spray-coating substrate. For this reason, when there is no plate under the coating substrate, the coating knife will still spray a large amount of paint, and these coatings will be recycled manually, but the recycled coatings are prone to solidification. Once the workers forget to deal with them in time, the recycled coatings will be scrapped.

SUMMARY OF THE INVENTION

The present invention aims to provide a door panel paint flow coating production line to solve the problem in the prior art that wood chips or dust adhere to the door panel and affect the appearance quality of the door panel caused by incomplete adsorption of the polished wood chips by means of negative pressure adsorption.

In order to achieve the above object, the basic scheme of the present invention is as follows:

The door panel paint curtain coating production line, including the frame, the conveyor belt, the grinding unit, the negative pressure unit and the curtain coating unit, between the negative pressure unit and the curtain coating unit, the adhesion unit also includes the drive, the adhesive belt and Several infusion rollers, the driver drives the infusion roller to rotate, the adhesive tape is made of fabric, and the adhesive tape is sleeved on the infusion roller; the infusion roller is provided with a cavity, the cavity is filled with solution, and the infusion roller is provided with a circulation channel, The circulation channel is communicated with the cavity, the circulation channel is slidably connected with a blocking block, one end of the blocking block can extend out of the circulation channel, and an elastic piece is connected between the other end of the blocking block and the corresponding inner wall of the circulation channel; The flow groove communicated with the cavity, and the block can block the flow groove.

Beneficial effects compared to the prior art:

When this scheme is adopted, the infusion roller is driven to rotate by the driver, and the adhesive belt moves with the rotation of the infusion roller like a belt line. The circulation channel moves to the inside of the infusion roller, so that the circulation groove loses the blockage of the block, and the outside world is communicated with the cavity through the circulation groove. The solution in the cavity flows out from the circulation groove and then flows to the adhesive tape. contact, and then in the process of continuous movement of the adhesive tape, the adhesive tape can wipe the plate, and then the tiny sawdust and dust on the adhesive tape that are difficult to be adsorbed by the negative pressure unit are wiped clean. The prior art can ensure that the surface of the board is clean and tidy before the board enters the spray coating unit, and avoids the occurrence of wood chips floating on the paint and affecting the appearance quality of the door board.

In this solution, the solution will only flow out when the adhesive tape is in contact with the infusion roller. At the part where the adhesive tape does not touch the infusion roller, the blocking block automatically extends out of the infusion roller under the elastic force of the elastic member, thereby blocking the flow groove. , to avoid the loss of solution in the cavity of the infusion roller.

Further, the adhesion unit also includes a number of collection cylinders, the infusion roller and the collection cylinder are located on the inner and outer sides of the adhesive tape, the collection cylinder is provided with a grille, the adhesive tape can cover the grille, and the collection cylinder is connected to the outside. The number of infusion rollers is several, and at least one collection cylinder is arranged between adjacent infusion rollers.

Beneficial effect: after the adhesive tape is in contact with the board to wipe the board, the sawdust or dust on the board is attached to the adhesive tape. During the process of the adhesive tape moving with the rotation of the infusion roller, the The belt is in contact with the collection cylinder between the adjacent infusion rollers, and the sawdust and dust attached to the adhesive belt can be pumped into the collection cylinder through the grid under the action of the negative pressure device; at least one infusion roller is arranged between the adjacent infusion rollers. After the adhesive tape is in contact with the plate, the sawdust or dust on the adhesive tape can be collected by the collection tube in time and quickly, so that the adhesive tape entering the next infusion roller is relatively clean, which is further conducive to the cleaning of the plate. Wipe clean.

Further, the solution adopts alcohol; the alcohol is volatile, and the alcohol does not damage the wood, so it can not only achieve the effect of wiping the sawdust and dust, but also does not affect the subsequent coating of the board.

Further, the adhering unit further includes a guide roller, the guide roller rotates synchronously with the infusion roller, the guide roller is located above the infusion roller, and the adhesive belt is sleeved on the guide roller and the infusion roller.

Beneficial effect: The presence of guide rollers facilitates the movement of the adhesive tape.

Further, the grinding unit includes several rotatable rotating rollers, the outer circumference of the rotating rollers is provided with grinding sandpaper, and the rotating rollers are parallel to the conveyor belt.

Beneficial effects: The plate is polished through a rotating roller with sandpaper, and the operation is convenient.

Further, the rotational speeds of several of the rotating rollers are different, and the rotational speeds of the rotating rollers increase sequentially with the conveying direction of the conveyor belt.

Beneficial effect: In the case of the same mesh number of sandpaper, the rotating speed increases, and the polished surface is smoother. Therefore, the rough grinding and fine grinding of the plate can be relatively achieved by the different rotating speed in this scheme.

Further, the number of the conveyor belts is at least two, the flow coating unit includes a flow coating base, a return groove is arranged under the flow coating base, and the return groove is located between the adjacent conveyor belts. Connected to the recycling bin.

Beneficial effect: When the curtain coating unit is performing curtain coating, the paint sprayed on the coating substrate can be directly sprayed onto the reflow tank due to the space between adjacent plates, so that the sprayed out unused coating can pass through the reflow tank. Collect into recycling bins for easy paint recycling.

Further, a moving rod is slidably connected in the recirculation tank, the bottom of the recirculation tank is arc-shaped, two springs are sleeved on the moving rod, the springs are in contact with the arc-shaped bottom of the recirculation tank, and a baffle is detachably connected to the moving rod. , two springs are located on both sides of the baffle, and both springs are in contact with the baffle and the return groove.

Beneficial effect: When the paint is sprayed on the reflow tank, the splash of the paint is hindered by the existence of the spring; in addition, when the moving rod is moved, the spring is compressed or stretched by the baffle, and the spring is in the process of compression or stretching. There is friction with the inner wall of the reflow tank, and then the paint on the inner wall of the reflow tank is scraped off, so as to avoid the situation that the paint adheres to the reflow tank and hardens in the reflow tank.

Further, a rotatable stirring shaft is arranged in the recovery box, a stirring blade is fixedly connected to the lower part of the stirring shaft, a pressure plate is fixedly connected to the upper part of the stirring shaft, a filter screen is arranged in the recovery box, the pressure plate is located above the filter screen, and the stirring blade is It is located below the filter screen; the bottom of the pressure plate is provided with a sharp cone, which can be offset against the filter screen.

Beneficial effects: The stirring shaft continuously rotates to drive the stirring blades to continuously stir the paint in the recovery box, so as to avoid the paint from being hardened and agglomerated if it is not used in time.

The recovered large pieces of paint are intercepted by the filter screen. During the rotation of the pressing plate with the stirring shaft, the large pieces of paint are smashed by the sharp cone at the bottom of the pressing plate. The paint falls through the filter screen to the bottom of the recovery tank, and is continuously stirred by the stirring blade.

Further, the stirring shaft passes through the recovery box, a connecting rod is fixedly connected to the stirring shaft, and a push column is fixedly connected to the connecting rod; the moving rod extends out of the return groove, and the push rod can push the moving rod.

Beneficial effects: the rotation of the stirring shaft drives the rotation of the connecting rod, and the connecting rod rotates to push the moving rod to move, so that the mechanical energy of the rotation of the stirring shaft can be further utilized.

Description of drawings

1 is a front view of Embodiment 1 of the present invention;

Fig. 2 is the front sectional view of the collecting cylinder in Fig. 1;

Fig. 3 is the front sectional view of the infusion roller in Fig. 1;

Fig. 4 is the enlarged schematic diagram of A part in Fig. 3;

Fig. 5 is a partial schematic diagram of direction B in Fig. 4;

6 is a front view of Embodiment 2 of the present invention;

7 is a top view of the flow coating unit in Embodiment 3 of the present invention;

8 is a front partial cross-sectional view of the flow coating unit in Embodiment 3 of the present invention;

9 is a front cross-sectional view of the position of the reflow tank in Embodiment 3 of the present invention;

Fig. 10 is the top view of the reflux tank and the recovery tank in the third embodiment of the present invention;

FIG. 11 is a front sectional view of the recycling box in the third embodiment of the present invention.

Detailed ways

The following is further described in detail by specific embodiments:

Reference numerals in the accompanying drawings include: frame 1, coating substrate 2, conveyor belt 3, rotating roller 4, adsorption cover 5, adhesive belt 6, infusion roller 7, collecting drum 8, guide roller 9, cavity 71 , circulation channel 72, blocking block 73, compression spring 74, circulation groove 75, grille 81, drying chamber 10, return groove 12, spray coating knife edge 13, recovery box 14, moving rod 15, spring 16, baffle 17 , Disc 18 , stirring shaft 19 , stirring blade 20 , pressing plate 21 , filter screen 22 , turntable 23 , push column 24 .

Example 1

Embodiment 1 is basically as shown in accompanying drawings 1 to 5:

Lacquer coating production line for door panel, including frame 1, conveyor belt 3, grinding unit, negative pressure unit, adhesion unit and curtain coating unit. The directions are distributed in sequence, and there is a negative pressure unit behind each grinding unit.

1, the grinding unit includes three rotating rollers 4 rotatably connected to the frame 1, each rotating roller 4 is driven by a separate motor, the outer circumference of the rotating roller 4 is bonded with grinding sandpaper, the rotating roller 4 and the conveyor belt 3 Parallel; the rotational speeds of the three rotating rollers 4 are different, and the rotational speeds of the rotating rollers 4 increase sequentially from right to left.

The negative pressure unit includes a negative pressure fan fixed on the rack 1 and an adsorption cover 5, the adsorption cover 5 is communicated with the negative pressure fan, the adsorption cover 5 is covered above the board, and most of the wood chips on the board are passed through the adsorption cover by the negative pressure fan. 5 Suck away.

1, 3 to 5, the adhesion unit includes a motor, an adhesion belt 6, an infusion roller 7, a collection drum 8 and a guide roller 9. The number of infusion rollers 7 and collection drums 8 is three, and the guide roller 9 The number is six, the guide roller 9 and the infusion roller 7 are rotatably connected to the frame 1, the motor and the collecting cylinder 8 are fixedly connected to the frame 1 by screws; the motor drives the guide roller 9 to rotate, and the guide roller 9 is located on the infusion roller 7. Above, the chain drive connection between the guide roller 9 and the infusion roller 7, the infusion roller 7 and the guide roller 9 rotate synchronously; the adhesive belt 6 is made of fabric, and the adhesive belt 6 is sleeved on the guide roller 9 and the infusion roller The attachment 6 moves with the rotation of the guide roller 9 and the infusion roller 7 .

3 to 5, the infusion roller 7 includes a cylinder and end caps at both ends of the cylinder, the end caps are fixedly connected to the frame 1, the cylinder and the end caps are rotatably connected, and the cylinder and the guide roller 9 are connected by chain drive , the space between the cylinder of the infusion roller 7 and the cover at both ends forms a cavity 71 inside the infusion roller 7, the cavity 71 is filled with alcohol, the cylinder of the infusion roller 7 is provided with a number of circulation channels 72, and the circulation channels 72 Connected with the cavity 71 , a blocking block 73 is slidably connected to the circulation channel 72 , the blocking block 73 is T-shaped, one end of the blocking block 73 can extend out of the circulation channel 72 , and the other end of the blocking block 73 is between the inner wall corresponding to the circulation channel 72 . A compression spring 74 is connected; the circulation channel 72 is provided with a circulation groove 75 which communicates the outside with the cavity 71 , and the blocking block 73 can block the circulation groove 75 .

The infusion roller 7 and the collection cylinder 8 are located on the inner and outer sides of the adhesive tape 6. The upper part of the collection drum 8 is integrally formed with a grille 81, and the adhesive tape 6 can cover the grille 81 (the adhesive tape 6 can cover the grille 81). (hold), the collecting cylinder 8 is connected to the external negative pressure device;

The flow coating unit includes a flow coating base 2 and a paint pump, and a flow coating knife is arranged in the flow coating base 2 .

When using this door panel lacquer coating production line to produce door panels, the specific steps are as follows:

Grinding: The rotating roller 4 with grinding sandpaper is used to realize the grinding of the plate; and the rotation speed of the three rotating rollers 4 increases in turn with the conveying direction of the conveyor belt 3, so the grinding of the plate is also more and more fine, and the grinding from coarse to fine is realized. The process makes the surface of the plate more smooth.

Main dust removal: use a negative pressure fan to suck most of the wood chips on the polished board through the adsorption cover 5.

Auxiliary dust removal: start the motor that drives the guide roller 9 to rotate, so that the adhesive belt 6 moves continuously under the drive of the guide roller 9 and the infusion roller 7, and the adhesive belt 6 is pressed against the block 73 installed on the infusion roller 7 during the moving process. The blocking block 73 is moved to the inside of the infusion roller 7 along the circulation channel 72, so that the circulation groove 75 loses the blocking of the blocking block 73; Flow out and then flow onto the adhesive tape 6, the adhesive tape 6 is in contact with the sheet, and then in the process of moving with the adhesive tape 6, the sheet is wiped by the adhesive tape 6, and then the adhesive tape 6 is wiped. The tiny wood chips and dust that are difficult to be absorbed by the negative pressure unit can be wiped clean to avoid the situation that the wood chips float on the paint and affect the appearance quality of the door panel.

After the adhesive tape 6 is in contact with the board to wipe the board, the wood chips or dust on the board are attached to the adhesive tape 6. During the movement of the adhesive tape 6 with the rotation of the infusion roller 7, the adhesive tape 6 moves. The attachment 6 is in contact with the collection cylinder 8 between the adjacent infusion rollers 7, and the sawdust and dust attached to the adhesive tape 6 can be pumped into the collection cylinder 8 through the grille 81 under the action of the negative pressure device. When the belt 6 enters the next infusion roller 7, the sawdust and dust on the adhesive belt 6 have been collected by the collecting cylinder 8, thus ensuring that the adhesive belt 6 is in a relatively clean state, which is further beneficial for the adhesive belt 6 with alcohol to remove. Wipe the board clean.

In the first embodiment, the alcohol will only flow out when the adhesive tape 6 is in contact with the infusion roller 7 . At the position where the adhesive tape 6 and the infusion roller 7 do not abut, the blocking block 73 automatically extends under the elastic force of the compression spring 74 The infusion roller 7, and then the flow groove 75 is blocked, so as to avoid the loss of the solution in the cavity 71 of the infusion roller 7.

Spray coating: start the paint pump, the paint pump will pump the paint into the spray coating substrate 2, and the paint will be sprayed onto the board through the spray coating knife edge 13 to complete the spray coating on the board.

Embodiment 2

Referring to FIG. 6 , the second embodiment adds a drying chamber 10 on the basis of the first embodiment, that is, a drying chamber 10 is set between the adhesion unit and the spray coating unit, so as to facilitate the use of alcohol to adhere the wood chips and dust to the board. Drying, and then spray coating after the board is dry, so as to avoid the situation that the board is not completely dried due to the presence of alcohol, which affects the quality of the subsequent board.

Embodiment 3

Embodiment 3 is basically shown in Figures 7 to 11, and Embodiment 2 makes the following improvements on the basis of Embodiment 1, as follows:

The number of the conveyor belts 3 is three, and a recirculation groove 12 is arranged between the two conveyor belts 3 , and the recirculation groove 12 is opposite to the coating knife edge 13 of the coating substrate 2 .

Referring to FIG. 10 , a recovery box 14 is also fixedly installed on the rack 1 , and the recovery box 14 communicates with the return tank 12 .

8 to 11 , a moving rod 15 is slidably connected in the return groove 12 (the moving rod 15 can move in its own length direction), the bottom of the return groove 12 is arc-shaped, and two springs 16 are sleeved on the moving rod 15 , the spring 16 is in contact with the arc-shaped bottom of the return groove 12; the middle part of the moving rod 15 is fixedly connected with a baffle plate 17 by screws, and the two springs 16 are located on the front and rear sides of the baffle plate 17 (combined with FIG. 10). The two springs 16 One end is fixedly connected to the baffle plate 17 and the other end is fixedly connected to the inner wall of the return tank 12. Both ends of the moving rod 15 extend out of the return tank 12.

10 and 11, the recovery box 14 is fixedly installed on the frame 1 by bolts, a motor (not shown in the figure) is installed on the frame 1, and the recovery box 14 is rotatably connected with a stirring shaft 19 through a bearing, and the motor drives The stirring shaft 19 rotates, the middle and lower parts of the stirring shaft 19 all extend into the recovery box 14, and the upper part of the stirring shaft 19 penetrates the top of the recovery box 14; The middle and upper parts are fixedly connected with four pressing plates 21 by screws. The pressing plates 21 and the stirring blades 20 are evenly distributed along the circumferential direction of the stirring shaft 19 , and the bottom of the pressing plate 21 is integrally formed with a sharp cone.

Four protruding columns are welded in the recovery box 14 , on which is placed a filter screen 22 , the sharp cone of the pressing plate 21 can abut against the filtering screen 22 , the stirring blade 20 is located below the filtering screen 22 , and the pressing plate 21 is located above the filtering screen 22 . .

The part of the stirring shaft 19 passing through the recovery box 14 is fixedly connected with a turntable 23 by screws, a connecting rod is welded on the turntable 23, and the free end of the connecting rod is fixedly connected with a push post 24 by screws; The fixedly connected discs 18 abut against each other.

The specific implementation process is as follows:

During the spray coating, start the paint pump, the paint pump pumps the paint into the spray coating substrate 2, and the paint is sprayed out through the spray coating knife edge 13; when no plate passes under the spray coating knife edge 13, the paint is directly sprayed to the reflux On the spring 16 of the tank 12, the spiral shape of the spring 16 blocks the paint impacting into the reflow tank 12, preventing the paint from splashing; at the same time, the paint automatically flows to the recovery tank 14 under the inclination of the reflow tank 12. , realizing the timely recovery of excess paint.

During the process of the paint flowing into the recovery box 14, the motor is started, the stirring shaft 19 is continuously rotated, the large particles of paint flowing into the recovery box 14 are blocked by the filter screen 22, and the remaining paint passes through the filter screen 22 and is continuously stirred by the stirring blade 20, Avoid hardening and caking of paint.

The large pieces of paint left on the filter screen 22 are smashed by the sharp cones at the bottom of the pressing plate 21 during the rotation of the pressing plate 21 with the stirring shaft 19, and the smashed paint is continuously fed into the recovery box 14. Other tiny paints pass through the filter screen 22 and fall to the bottom of the recovery box 14 , and are continuously stirred by the stirring blades 20 .

In addition, during the rotation of the stirring shaft 19, the stirring shaft 19 drives the turntable 23 to rotate, and the connecting rod on the turntable 23 drives the push column 24 to push the moving rod 15 to move back and forth. During the movement of the moving rod 15, one of the two springs 16 is compressed and the other is compressed. Under tension, in the process of stretching and compressing the spring 16, the spring 16 rubs against the inner wall of the reflow tank 12, and then scrapes off the paint attached to the reflow tank 12, so as to prevent the paint from sticking to the reflow tank 12 and in the reflow tank 12. The case of hardening in the reflow tank 12 .

The above descriptions are only embodiments of the present invention, and common knowledge such as well-known specific structures and characteristics in the solution are not described too much here. It should be pointed out that for those skilled in the art, some modifications and improvements can be made without departing from the structure of the present invention. These should also be regarded as the protection scope of the present invention, and these will not affect the implementation of the present invention. Effectiveness and utility of patents. The scope of protection claimed in this application shall be based on the content of the claims, and the descriptions of the specific implementation manners in the description can be used to interpret the content of the claims.

Claims (10)

1. The paint spray coating production line on the door panel includes a frame, a conveyor belt, a grinding unit, a negative pressure unit and a spray coating unit, and is characterized in that: between the negative pressure unit and the spray coating unit, an adhesion unit is also included, and the adhesion unit includes A driver, an adhesive belt and several infusion rollers, the driver drives the infusion roller to rotate, the adhesive belt is made of fabric, and the adhesive belt is sleeved on the infusion roller; the infusion roller is provided with a cavity, and the cavity is filled with solution, the infusion roller There is a circulation channel on it, the circulation channel is communicated with the cavity, the circulation channel is slidably connected with a blocking block, one end of the blocking block can extend out of the circulation channel, and an elastic piece is connected between the other end of the blocking block and the corresponding inner wall of the circulation channel; The passage is provided with a flow groove that communicates the outside world with the cavity, and the blocking block can block the flow groove. 2. The paint spray coating production line on the door panel according to claim 1, characterized in that: the adhesion unit further comprises a plurality of collection cylinders, the infusion roller and the collection cylinder are located on the inner and outer sides of the adhesive belt, and the collection cylinder is provided with There is a grid, the adhesive tape can cover the grid, and the collecting cylinder is connected to an external negative pressure device; the number of infusion rollers is several, and at least one collecting cylinder is arranged between adjacent infusion rollers. 3. The paint spray coating production line on the door panel according to claim 2, wherein the solution adopts alcohol. 4. The paint spray coating production line for door panels according to claim 2, wherein the adhesion unit further comprises a guide roller, the guide roller rotates synchronously with the infusion roller, the guide roller is located above the infusion roller, and the adhesive belt is sleeved on the infusion roller. on the guide roller and the infusion roller. 5 . The paint spray coating production line for door panels according to claim 4 , wherein the grinding unit comprises a plurality of rotatable rotating rollers, the outer circumference of the rotating rollers is provided with grinding sandpaper, and the rotating rollers are parallel to the conveyor belt. 6 . 6 . The paint curtain coating production line for door panels according to claim 5 , wherein the rotational speeds of the several rotating rollers are different, and the rotational speeds of the rotating rollers increase sequentially with the conveying direction of the conveyor belt. 7 . 7. The door panel paint spray coating production line according to claim 6, wherein the number of the conveyor belts is at least two, the spray coating unit comprises a flow coating base, and a reflow groove is arranged under the flow coating base, and the return groove is located at the bottom of the flow coating base. Between adjacent conveyor belts, a recovery box is also arranged on the rack, and the return tank is communicated with the recovery box. 8 . The paint spray coating production line on the door panel according to claim 7 , wherein a moving rod is slidably connected in the recirculation groove, the bottom of the recirculation groove is arc-shaped, and two springs are sleeved on the moving rod. The arc-shaped bottom of the return groove is in contact with each other, a baffle is detachably connected to the moving rod, two springs are located on both sides of the baffle, and both springs are in contact with the baffle and the return groove. 9 . The paint spray coating production line for door panels according to claim 8 , wherein a rotatable stirring shaft is provided in the recovery box, a stirring blade is fixedly connected to the lower part of the stirring shaft, and a pressing plate is fixedly connected to the upper part of the stirring shaft. 10 . , There is a filter screen in the recovery box, the pressure plate is located above the filter screen, and the stirring blade is located below the filter screen; the bottom of the pressure plate is provided with a sharp cone, which can be offset with the filter screen. 10. The paint spray coating production line on the door panel according to claim 9, characterized in that: the stirring shaft passes through the recovery box, a connecting rod is fixedly connected to the stirring shaft, and a push column is fixedly connected to the connecting rod; Out of the return tank, the push rod can push the moving rod.

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