CN115056404B - Glove gum dipping system and gum dipping method thereof - Google Patents

Abstract

The invention provides a glove gum dipping system and a gum dipping method thereof. The dipping box comprises a box body and further comprises a circulation driving module, wherein the circulation driving module comprises a motor, an annular circulation part and two rotating shafts, the two rotating shafts are arranged side by side and rotatably arranged in the box body, the annular circulation part is wound on the two rotating shafts, and the motor is in transmission connection with one rotating shaft. The gum dipping quality is improved, so that the product quality and the yield are improved.

Description

Glove gum dipping system and gum dipping method thereof

Technical Field

The invention relates to a mechanical device, in particular to a glove dipping system and a dipping method thereof.

Background

Gloves are commonly used articles in daily life and industrial production of people, wherein the dipped gloves are widely applied to industrial production due to good protection. Wherein, during the production process of the labor protection glove, the outside of the glove body is required to be subjected to gum dipping treatment. In the processing process, the glove body is generally sleeved on the hand mould, and the hand mould drives the glove body to move to the gum dipping box under the drive of the conveying chain, so that the glove body is immersed into the gum solution of the gum dipping box to finish gum dipping treatment. However, since the glue solution in the dipping tank is generally made of a glue solution material such as natural thermal latex or nitrile latex, it is necessary to ensure that the glue solution can keep circulating in the dipping tank during the use process so as to avoid forming a glue film on the surface. For example: CN 113427688A discloses a dipping mechanism and a glove dipping system, which adopt a plurality of annular circulating components arranged side by side to drive glue solution in a box body glue box to circularly flow. However, in the use process, as the viscosity of the glue solution is larger, the glue solution close to the side wall of the glue box is larger in viscosity with the side wall of the glue box, so that the flowing speed of the glue solution in the side wall area of the glue box is lower, the glue solution is in a speed step, the glue surface of the glue solution is uneven, and the glove dipping effect is poor, so that the quality of a glove product is reduced. Therefore, how to design a technology for improving the gum dipping quality to improve the product quality and the yield is the technical problem to be solved by the invention.

Disclosure of Invention

The technical problems to be solved by the invention are as follows: the glove gum dipping system and the gum dipping method thereof are provided, so that the gum dipping quality is improved, and the product quality and the yield are improved.

The invention provides a glove dipping system which comprises a frame, a dipping box, a conveying chain and a plurality of mold rods, wherein the conveying chain is arranged on the frame, the mold rods are arranged on the conveying chain and move along with the conveying chain in a circulating way, and hand molds are arranged on the mold rods;

the gum dipping box is arranged on the frame and comprises a box body and a plurality of guide rods capable of circularly moving in the box body;

the distance between two adjacent guide rods is the same as the distance between two adjacent mould rods, and the guide rods and the mould rods synchronously move.

Further, a lifting mechanism is further arranged on the frame, the dipping box is arranged on the lifting mechanism, and the lifting mechanism is configured to drive the box body to be close to or far away from the hand mould above the box body;

the frame is also provided with a sensor, and the sensor is configured to detect the liquid level of the glue solution in the box body so as to control the lifting mechanism to drive the box body to rise.

Further, the gum dipping box comprises a flow guiding assembly, the flow guiding assembly comprises a plurality of flow guiding rods, a partition plate, an annular circulating part and a driving part, the flow guiding rods are arranged side by side and arranged on the annular circulating part, the annular circulating part is arranged in the box, the partition plate is transversely arranged in the box, and the driving part is configured to drive the annular circulating part to carry the flow guiding rods to circularly move around the partition plate in the box.

Further, the driving part comprises two rotating shafts, and the two rotating shafts are arranged in parallel and are rotatably arranged on the box body; the guide assembly comprises two annular circulating components which are arranged oppositely, the annular circulating components are wound on two rotating shafts, and the guide rod is arranged between the two annular circulating components.

Further, the annular circulating component is arranged close to the tank wall on the corresponding side of the tank body, a guide supporting piece is further arranged on the tank wall of the tank body, and a guide part is formed at the upper part of the guide supporting piece; the annular circulation member surrounds the outside of the guide support at the corresponding side, an upper portion of the annular circulation member being abutted against an upper portion of the guide support, the guide portion being configured to guide movement of the upper portion of the annular circulation member.

Furthermore, the two ends of the guide rod are also provided with scraping plates, and the scraping plates extend towards the box wall direction at the corresponding side of the box body.

Further, the driving part comprises a motor, and the motor is in transmission connection with at least one rotating shaft; or, at least one rotating shaft is provided with a chain wheel, and the conveying chain is in transmission connection with the chain wheel.

Further, an overflow plate is further arranged in the box body, the overflow plate is vertically arranged and divides the box body into a liquid storage area and an overflow area, and the flow guide assembly is positioned in the liquid storage area;

the top of the guide rod above the partition plate is higher than the upper edge of the overflow plate.

The invention also provides a dipping method of the glove dipping system, which is characterized in that the dipping method comprises the step that a die rod drives a hand die sleeved with a glove to move into a dipping box, the hand die is positioned between two adjacent guide rods in the dipping box, and the hand die and the guide rods synchronously move.

Further, the gum dipping method further comprises the following steps: the liquid level of the dipping box is detected through the sensor, so that the lifting mechanism is controlled to drive the dipping box to lift until the distance between the liquid level of the dipping box and the sensor reaches a set distance value.

According to the glove dipping system and the dipping method thereof, the guide rod capable of circularly moving is arranged in the box body, the glue solution in the box body is driven by the guide rod, the end part of the guide rod can more effectively drive the glue solution close to the side wall of the box body to circularly flow, and further, the speed gradient formed by the viscous action of the glue solution close to the side wall of the box body is avoided, so that the defect of concave colloid plane caused by laminar flow and advection speed gradient of a glue solution plane is overcome, the dipping quality is improved, and the product quality and the yield are improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it will be obvious that the drawings in the following description are some embodiments of the present invention, and that other drawings can be obtained according to these drawings without inventive effort to a person skilled in the art.

FIG. 1 is a schematic diagram of a dipping tank according to one embodiment of the invention;

FIG. 2 is a second schematic diagram of a dipping box according to the embodiment of the invention;

FIG. 3 is a third schematic diagram of a dipping tank according to the embodiment of the invention;

FIG. 4 is a cross-sectional view taken along line A-A of FIG. 3;

FIG. 5 is a cross-sectional view taken along B-B in FIG. 3;

FIG. 6 is an enlarged partial schematic view of region C of FIG. 5;

FIG. 7 is an assembled view of a deflector rod in an embodiment of the dipping tank of the present invention;

FIG. 8 is an enlarged partial schematic view of region D of FIG. 7;

FIG. 9 is a schematic diagram of the agitator in an embodiment of the dipping tank of the present invention;

figure 10 is a schematic diagram of an embodiment of a glove dipping system of the present invention.

Reference numerals:

the device comprises a frame 100, a conveying chain 200, a mold rod 300, a hand mold 400, a dipping box 500, a lifting mechanism 600 and a sensor 700;

the box body 1, the guide supporting piece 11, the guide part 12 and the overflow plate 13;

the device comprises a flow guide assembly 2, a flow guide rod 21, a baffle 22, an annular circulating part 23 and a driving part 24;

a scraper 211 and a rotating shaft 241;

stirrer 3, stirring shaft 31, blade 32, through hole 33.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

In a first embodiment, as shown in fig. 1 to 9, the present invention provides a dipping box, including: the box 1 and the water conservancy diversion subassembly 2, the water conservancy diversion subassembly 2 includes a plurality of water conservancy diversion poles 21, baffle 22, annular circulation part 23 and drive part 24, and a plurality of water conservancy diversion poles 21 arrange side by side and set up on annular circulation part 23, and annular circulation part 23 sets up in box 1, and baffle 22 transversely sets up in box 1, and drive part 24 is configured to drive annular circulation part 23 and carry water conservancy diversion pole 21 around baffle 22 circulation movement in box 1.

Specifically, in the gum dipping box of the embodiment, a plurality of guide rods 21 capable of moving circularly are arranged in the box body 1, the plurality of guide rods 21 can move circularly along with the annular circulating part 23, and then the moving guide rods 21 are utilized to drive gum liquid in the box body 1.

The guide rod 21 is arranged in a manner that the guide rod 21 extends perpendicular to the movement direction of the guide rod 21 in the circulating movement process, and two end parts of the guide rod 21 can be effectively close to the side wall of the box body 1. Like this, guide bar 21 makes the uniform motion and will prevent the laminar flow fluctuation of colloid to the tip of guide bar 21 can more effectual drive be close to the glue solution circulation flow of box 1 lateral wall, and then avoids the velocity gradient that the lateral wall that is close to box 1 because of the glue solution receives viscous effect to the glue solution plane is sunken because of laminar flow and advection velocity ladder causes also to overcome the glue solution plane.

Under the action of the guide rod 21, the liquid level of the glue solution in the box body 1 can be kept consistent, and the liquid level can be ensured to be consistent during the glove dipping process, so that the dipping effect and quality of the glove are improved.

In the actual use process, the moving speed of the guide rods 21 is the same as that of the mold rods driving the glove to move, and meanwhile, the glove is positioned between two adjacent guide rods 21 to finish the dipping operation in the dipping process when moving to the box body 1, so that the glove is limited in the liquid level area between the corresponding guide rods 21 in the dipping process, and further, the influence of the glue dropping on the liquid level of the glue solution in the box body 1 caused by other dipped gloves can be effectively avoided. Specifically, since the mold rod and the guide rods 21 move synchronously, the dipped glove is always positioned above the corresponding two guide rods 21 in the dipping and glue dripping processes, so that the glue solution dripped in the glove glue dripping process also falls on the liquid level between the two guide rods 21 corresponding to the lower part, and the liquid level between other adjacent guide rods 21 is not influenced.

Further, in order to meet the requirement that the annular circulating member 23 drives the guide rod 21 to move in the case 1 in a circulating manner, the driving member 24 includes two rotating shafts 241, and the two rotating shafts 241 are arranged in parallel and rotatably provided on the case 1; the flow guiding assembly comprises two annular circulating components 23 which are arranged oppositely, the annular circulating components 23 are wound on two rotating shafts 241, and the flow guiding rod 21 is arranged between the two annular circulating components 23.

Specifically, the two rotating shafts 241 may be correspondingly disposed at the corresponding end portions of the box 1, the two rotating shafts 241 are utilized to support the two annular circulating components 23, and the flow guide rod 21 is mounted on the two annular circulating components 23, so that the requirement that the flow guide rod 21 is integrally maintained to be horizontally disposed can be ensured, and further, a more stable glue solution level can be obtained.

There are various ways in which the entity of representation of the annular circulation member 23 may be: the annular circulating part 23 is a chain, and a rotary shaft 241 is correspondingly provided with a chain wheel; or, the annular circulating part 23 is a synchronous belt, and correspondingly, a synchronous wheel is arranged on the rotating shaft 241. No limitation is made herein to the entity of the representation of the endless loop member 23.

In addition, in order to drive the deflector rod 21 to move synchronously with the mold rod at the same speed, the driving part 24 may comprise a motor in driving connection with at least one rotation shaft 241. Specifically, the driving part 24 is configured with an independent motor, and the motor drives the rotation shaft 241 to rotate so that the guide rod 21 and the mold rod move synchronously at the same speed. Or, the driving force of the rotating shaft 241 may be directly achieved by using the driving force of a conveying chain in the glove dipping system, specifically, at least one rotating shaft 241 is provided with a sprocket, and the conveying chain 200 is in driving connection with the sprocket.

Furthermore, in order to more effectively drive the glue solution close to the side wall of the box body 1 to circularly flow, the annular circulating component 23 is arranged close to the box wall of the corresponding side of the box body 1, the box wall of the box body 1 is also provided with a guide support piece 11, and the upper part of the guide support piece 11 forms a guide part 12; the annular circulation member 23 surrounds the outside of the guide support 11 on the corresponding side, the upper portion of the annular circulation member 23 is abutted against the upper portion of the guide support 11, and the guide 12 is configured to guide the upper portion of the annular circulation member 23 to move.

Specifically, for the annular circulation member 23, it is disposed as close to the side wall of the casing 1 as possible, and in order to ensure that the upper portion of the annular circulation member 23 can move smoothly to reduce the influence on the glue level, the guide support 11 is disposed on the side wall of the casing 1 to support the upper portion of the annular circulation member 23. In this way, during the movement of the annular circulation member 23, the upper annular circulation member 23 can be supported by the stationary guide support 11 to avoid the height position of the guide rod 21 from being affected by the collapse of the middle part due to gravity. In addition, the guide portion 12 can also enable the upper portion of the annular circulating member 23 to move stably and reliably, and shaking generated during movement is reduced. Taking the endless circulating member 23 as an example of a chain, the guide support 11 may be a support block, and the guide portion 12 is a guide rib formed on the top surface of the support block, and the upper chain is supported by the guide support 11 and smoothly moves along the guide rib.

Preferably, the guide rods 21 are further provided with scrapers 211 at both ends thereof, the scrapers 211 extending toward the wall of the case 1 on the corresponding side.

Specifically, the scrapers 211 are arranged at the two end parts of the guide rod 21, the scrapers 211 are vertically arranged when moving above the guide support piece 11, the scrapers 211 are closer to the side wall of the box body 1, and the scrapers 211 can be used for more effectively driving glue solution adhered on the side wall of the box body 1 to circularly flow, so that the step speed is reduced better, and the level of the glue solution in the box body 1 is kept flat.

Still further, in order to control the liquid level of the glue solution in the box body 1, an overflow plate 13 may be further disposed in the box body 1, the overflow plate 13 is vertically disposed and divides the box body 1 into a liquid storage area and an overflow area, and the flow guiding component 2 is disposed in the liquid storage area; wherein the top of the guide bar 21 above the partition 22 is higher than the upper edge of the overflow plate 13.

Specifically, by disposing the overflow plate 13 in the tank 1, the tank 1 is partitioned into two areas, namely, a liquid storage area and an overflow area, by the overflow plate 13. The glove is immersed in the liquid storage area, and the glue solution amount in the box body 1 is gradually reduced in the glove immersing process, so that new glue solution is needed to be supplemented in the corresponding liquid storage area, and in the glue solution supplementing process, the requirement of the glue solution on production is met, and the glue solution cannot be too high. For this purpose, by providing the overflow plate 13, the height thereof can be used to control the liquid level in the liquid storage area in the tank 1.

The top of the guide rod 21 is higher than the upper edge of the overflow plate 13, so that the glue solution can be partially exposed to effectively drive the glue solution to realize the circulating flow of the glue solution. Preferably, the center line of the guide bar 21 above the partition 22 is lower than the upper edge of the overflow plate 13. Specifically, in order to avoid the fluctuation of the liquid level in the moving process caused by the overhigh overall arrangement of the guide rod 21, the height of the center line of the guide rod 21 is set below the height plane where the upper edge of the overflow plate 13 is located, so that the guide rod 21 can stably drive the glue solution in the box body 1 to circularly flow and the fluctuation of the liquid level can not occur. And a circular rod can be adopted for the section of the flow guide rod 21 so as to improve the smoothness of pushing the glue solution, and the diameter of the flow guide rod 21 is set in the range of 10mm-50 mm.

Still further, the dipping box 500 further comprises a stirrer 3, the stirrer 3 comprises a stirring shaft 31 and a blade 32, the stirring shaft 31 is rotatably arranged in the box body 1, the blade 32 is arranged on the stirring shaft 31, and a plurality of through holes 33 are formed in the blade 32.

Specifically, the agitator 3 is disposed in the tank 1 below the partition 22, and the glue solution is agitated at the bottom of the tank 1 by the agitator 3. The through holes 33 arranged on the blades 32 can be used for stirring the glue solution at the bottom of the box body 1, and simultaneously, the glue solution can pass through the through holes 33 in the stirring process so as to reduce the influence on the liquid level of the glue solution at the top in the stirring process.

In use, the stirrers 3 may be disposed below the two ends of the partition 22, and the shielding plate 14 may be disposed above at least one stirrer 3. Specifically, the stirrers 3 distributed below the ends of the partition plate 22 can stir at the two end positions of the tank 1, so as to better drive the glue solution in the tank 1 to circularly flow. The shielding plate 14 arranged at the top can prevent the glue solution rolled up by the stirrer 3 in the stirring process from flowing upwards, so that the influence on the liquid level of the top glue solution in the stirring process is relieved.

In a second embodiment, as shown in fig. 10, the present invention further provides a glove dipping system, which includes a frame 100, a conveying chain 200, mold rods 300, hand molds 400 and a dipping box 500, wherein the conveying chain 200 is disposed on the frame 100, the mold rods 300 are disposed on the conveying chain 200 and move circularly along with the conveying chain 200, at least one hand mold 400 is disposed on each mold rod 300, the dipping box 500 is disposed on the frame 100, and the dipping box 500 includes a box body 1 and a plurality of guide rods 2 capable of moving circularly in the box body 1; wherein the distance between two adjacent guide rods 21 is the same as the distance between two adjacent mold rods 300, and the guide rods 21 move in synchronization with the mold rods 300.

Specifically, in the operation process of the glove dipping system, the glove is sleeved on the hand mold 400 configured on the mold rod 300, and the mold rod 300 moves along with the conveying chain 200 and drives the glove to move to the dipping box 500 for dipping treatment.

In the dipping tank 500, a guide rod 21 capable of circulating is disposed in the tank 1, and the glue solution in the tank 1 is driven to circulate by the guide rod 21. In addition, the moving speed of the guide rods 21 is the same as the moving speed of the mold rods 300 for moving the glove, so that the glove is limited in the liquid level area between the corresponding guide rods 21 in the dipping process, and further, the influence of the glue dripping on the liquid level of the glue solution in the box body 1 caused by other dipped gloves can be effectively avoided. Preferably, the distance between the adjacent two mold bars 300 is the same as the distance between the adjacent two guide bars in the dipping tank 500, and the guide bars are configured to move in synchronization with the mold bars 300.

Further, the frame 100 is further provided with a lifting mechanism 600, the dipping box 500 is arranged on the lifting mechanism 600, and the lifting mechanism 600 is configured to drive the box 1 to be close to or far away from the hand mold 400 above the box 1; the frame 100 is further provided with a sensor 700, and the sensor 700 is configured to detect the liquid level of the glue solution in the box 1 so as to control the lifting mechanism 600 to drive the box 1 to rise.

Specifically, in the use process, in order to improve the dipping effect and the dripping effect of the glove, the dipping box 500 is driven to move up and down by the lifting mechanism 600. The dipping box 500 is moved to a specific height to meet the dipping requirement of the glove, and after the dipping is completed, the dipping box 500 is moved downwards to ensure that the glove can effectively drip the redundant glue solution by using gravity, thereby improving the quality of the product.

The sensor 700 is configured to detect the level of the glue in the dipping tank 500, and further feedback control the elevation of the lifting mechanism 600 to ensure that the glue level of each glove dipping remains constant.

The specific entity of the lifting mechanism 600 may be a lifting mechanism (such as an electric push rod or a screw nut structure) or a winding mechanism formed by using a steel wire or a chain, which is not limited and described herein. In addition, the representation entity of the sensor 700 may employ a photoelectric sensor or a distance sensor, which is not limited and described herein.

In a third embodiment, the invention further provides a dipping method of the glove dipping system, wherein the dipping method comprises the step that the die rod drives the hand die sleeved with the glove to move into the dipping box, the hand die is positioned between two adjacent guide rods in the dipping box, and the hand die and the guide rods synchronously move.

Specifically, in the process that the hand mould on the mould rod drives the glove to circularly move, the guide rod in the dipping box also moves along with the mould rod at the same speed. In this way, the glove on the hand mould is immersed into the glue solution of the glue dipping box and is positioned between two adjacent guide rods in the moving process of the glue dipping box, so that the glove and the guide rods on two sides synchronously move, and the glue dipping effect and quality of the glove are improved by utilizing the stable glue solution level formed between the guide rods.

In the synchronous moving process of the mould rod and the guide rods, the dipped glove is always positioned above the two corresponding guide rods in the dipping and glue dripping processes, so that the glue solution dripped in the glove glue dripping process also falls onto the liquid level between the two corresponding guide rods below, and further the liquid level between other adjacent guide rods is not influenced, so that the dipped glove is prevented from being disturbed in the glue dripping process.

Still further, the dipping method further comprises: the liquid level of the dipping box is detected through the sensor, so that the lifting mechanism is controlled to drive the dipping box to lift until the distance between the liquid level of the dipping box and the sensor reaches a set distance value.

In the continuous dipping use process of the glove, the liquid level of the glue in the dipping box 500 can change, meanwhile, the liquid level can also change in the process of replenishing the glue in the dipping box, and the height of the liquid level in the dipping box is detected by a sensor to control the lifting mechanism to drive the lifting mechanism to lift the dipping box, so that the consistency of the height of the glue surface in the dipping process of the glove is met, and the quality of products is improved.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (7)

1. The glove gum dipping system is characterized by comprising a frame, a gum dipping box, a conveying chain and a plurality of mold rods, wherein the conveying chain is arranged on the frame, the mold rods are arranged on the conveying chain and move along with the conveying chain in a circulating way, and hand molds are arranged on the mold rods;

the gum dipping box is arranged on the frame and comprises a box body and a plurality of guide rods capable of circularly moving in the box body;

the distance between two adjacent guide rods is the same as the distance between two adjacent mold rods, and the guide rods and the mold rods synchronously move;

the frame is also provided with a lifting mechanism, the gum dipping box is arranged on the lifting mechanism, and the lifting mechanism is configured to drive the box body to be close to or far away from the hand mould above the box body;

the frame is also provided with a sensor, and the sensor is configured to detect the liquid level of the glue solution in the box body so as to control the lifting mechanism to drive the box body to rise;

the gum dipping box comprises a flow guiding assembly, wherein the flow guiding assembly comprises a plurality of flow guiding rods, a partition plate, an annular circulating part and a driving part, the flow guiding rods are arranged side by side and are arranged on the annular circulating part, the annular circulating part is arranged in the box body, the partition plate is transversely arranged in the box body, and the driving part is configured to drive the annular circulating part to drive the flow guiding rods to circularly move around the partition plate in the box body;

the driving part comprises two rotating shafts, and the two rotating shafts are arranged in parallel and are rotatably arranged on the box body; the guide assembly comprises two annular circulating components which are arranged oppositely, the annular circulating components are wound on two rotating shafts, and the guide rod is arranged between the two annular circulating components.

2. The glove dipping system according to claim 1, wherein the annular circulating member is disposed near a wall of a corresponding side of the case, a guide support is further provided on the wall of the case, and a guide portion is formed at an upper portion of the guide support; the annular circulation member surrounds the outside of the guide support at the corresponding side, an upper portion of the annular circulation member being abutted against an upper portion of the guide support, the guide portion being configured to guide movement of the upper portion of the annular circulation member.

3. The glove dipping system according to claim 1, wherein both end portions of the guide bar are further provided with scrapers extending toward a tank wall direction of a corresponding side of the tank.

4. The glove dipping system according to claim 1, wherein the drive component comprises a motor drivingly connected to at least one of the shafts; or, at least one rotating shaft is provided with a chain wheel, and the conveying chain is in transmission connection with the chain wheel.

5. The glove dipping system according to claim 1, wherein an overflow plate is further arranged in the box body, the overflow plate is vertically arranged and divides the box body into a liquid storage area and an overflow area, and the flow guiding assembly is positioned in the liquid storage area;

the top of the guide rod above the partition plate is higher than the upper edge of the overflow plate.

6. A method of dipping a glove dipping system according to any of claims 1 to 5 wherein the method comprises moving a glove-sleeved hand form into a dipping tank with the hand form between adjacent guide bars, the hand form moving in synchronism with the guide bars.

7. The method of dipping a glove dipping system according to claim 6, further comprising: the liquid level of the dipping box is detected through the sensor, so that the lifting mechanism is controlled to drive the dipping box to lift until the distance between the liquid level of the dipping box and the sensor reaches a set distance value.