Polishing machine grinding fluid recycling system and polishing machine

By introducing a combination of a recycling filter box, a liquid level sensor, and a replenishment component into the polishing machine, the problem of polishing slurry crystallization was solved, enabling the recycling of polishing slurry and reducing production costs and resource waste.

CN224074119UActive Publication Date: 2026-04-03DONGGUAN FEILIXUN INTELLIGENT TECHNOLOGY CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-04-25
Publication Date
2026-04-03

AI Technical Summary

Technical Problem

The polishing slurry used in existing polishing machines is prone to crystallization during use and recycling, leading to resource waste and increased production costs.

Method used

The system employs a combination of a recycling filter box, a liquid level sensor, and a replenishment assembly. The liquid level sensor monitors the level of the grinding fluid and controls the replenishment assembly to supply water, thus preventing crystallization of the grinding fluid and enabling its recycling.

Benefits of technology

It extends the service life of the grinding slurry, reduces production costs, and minimizes resource waste and environmental pollution.

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Abstract

The polishing machine grinding fluid recycling and circulating system comprises a fluid supply box, a water receiving disc and a recycling and filtering box, the fluid supply box is used for providing grinding fluid, a liquid level sensor is arranged in the fluid supply box, the water receiving disc is used for receiving the grinding fluid consumed by the fluid supply box, and the recycling and filtering box is used for filtering the grinding fluid consumed by the fluid supply box. One end of the recovery filter box is communicated with the water pan, and the other end of the recovery filter box is communicated with the liquid supply box. According to the polishing machine, the water level is monitored through the liquid level sensor, so that the polishing liquid is not prone to crystallization, recycling of the polishing liquid is completed through the recycling and filtering box, and the production cost is reduced.
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Description

[0001] This application claims priority to prior application number 2025201579299, filed on January 22, 2025. Technical Field

[0002] This application relates to the field of polishing machine technology, and more specifically, to a polishing machine slurry recycling system and a polishing machine. Background Technology

[0003] Polishing products requires the use of polishing slurry. Currently, the wastewater generated from the polishing machines is directly discharged, which has the following drawbacks: Large amounts of wastewater containing metal oxides are directly discharged into the drains, causing the polishing slurry to settle and clog the drains, leading to overflows. A professional team needs to be hired monthly to unclog the drains, resulting in significant waste of labor and finished products. The large volume of wastewater increases the difficulty and cost of wastewater treatment. Furthermore, the cost of polishing powder is too high, resulting in significant resource waste. The entire polishing workshop consumes a large amount of polishing slurry daily; direct discharge without recycling will cause substantial resource waste.

[0004] To address the aforementioned issues, application number 202123381981.3 discloses a liquid crystal panel polishing machine polishing fluid recovery device, which includes a sewage discharge pipe for connecting to the machine base of the liquid crystal panel polishing machine, a recovery pipe and a sedimentation tank. The upper end of the recovery pipe is connected to the sewage discharge pipe, and the top of the sedimentation tank is provided with a connecting pipe connected to the lower end of the recovery pipe. The lower end of the connecting pipe is located inside the sedimentation tank, and a filter structure is provided on the lower end of the connecting pipe. Drainage pipes are provided at both the upper and lower parts of the sedimentation tank.

[0005] Although the above-mentioned polishing slurry recovery device can realize the recycling of polishing slurry, its drawback is at least that the polishing machine tends to atomize the water in the polishing slurry during operation, which leads to the crystallization of zirconium oxide in the polishing slurry.

[0006] Therefore, existing technologies need to be improved. Utility Model Content

[0007] The purpose of this application is to provide a polishing machine slurry recycling system and a polishing machine, which aims to solve the technical problem of easy crystallization of slurry in the prior art.

[0008] To achieve the above objectives, the technical solution adopted in this application is as follows:

[0009] In a first aspect, this application provides a polishing machine slurry recycling system, comprising:

[0010] A recycling filter box is used to receive wastewater from the machine and filter the wastewater from the machine.

[0011] A liquid level sensor is installed in the recycling filter tank and is used to monitor the warning liquid level of the recycling filter tank.

[0012] A replenishment component is provided, which is connected to the recovery filter box and electrically connected to the liquid level sensor. The replenishment component is used to replenish the water in the recovery filter box.

[0013] In one embodiment, the supply component includes:

[0014] A water inlet pipe, which is connected to the recycling filter box;

[0015] A water pipe control valve is installed on the water inlet pipe and is used to control the water inlet pipe.

[0016] In one embodiment, the warning liquid level includes:

[0017] Lower limit liquid level: When the recovery filter box is at the lower limit liquid level, the replenishment component replenishes the water to the recovery filter box.

[0018] When the recovery filter box is at the upper limit liquid level, the replenishment component stops replenishing water to the recovery filter box.

[0019] In one embodiment, the recycling filter box includes:

[0020] Filter box body;

[0021] A water receiving tray is connected to the filter box body. The water receiving tray is used to receive the wastewater from the machine and transport the wastewater from the machine to the filter box body.

[0022] A drain pipe is connected to the filter box body and is used to transport the grinding fluid of the filter box body to the machine.

[0023] In one embodiment, the filter box body has a solution chamber, which is sequentially provided with a water inlet zone, a filtration zone, a cooling zone, and a liquid extraction zone; the recovery filter box further includes:

[0024] A primary filter assembly is provided in the water inlet area and is connected to the supply assembly.

[0025] A secondary filtration assembly is disposed in the filtration zone and is used to filter the solution in the recovery filtration box;

[0026] A liquid cooling assembly is disposed within the filter box body and is used to cool the solution in the recovery filter box.

[0027] A water pump is provided in the liquid extraction area and is used to transport the grinding fluid in the liquid extraction area to the drain pipe.

[0028] In one embodiment, the recycling filter box further includes:

[0029] A moving mechanism consisting of multiple moving wheels is disposed on the filter box body.

[0030] In one embodiment, the recycling filter box further includes:

[0031] A handle is provided on the filter box body.

[0032] In one embodiment, the primary filtering component includes:

[0033] A filter screen is disposed in the water inlet area and has a water inlet, which is connected to the supply component and the water receiving tray respectively.

[0034] The secondary filtration assembly includes a triple filter element disposed in the filtration zone. The triple filter element is used to filter the solution from the filter screen and transport the filtered solution to the cooling zone.

[0035] In one embodiment, a step portion is provided between the filtration zone and the cooling zone. The step portion includes a first plane, a second plane, and a vertical connecting surface. The first plane, the vertical connecting surface, and the second plane are sequentially connected to form a step structure, and the height of the first plane is higher than the height of the second plane.

[0036] Secondly, this application provides a polishing machine, wherein the polishing machine includes the polishing slurry recovery and circulation system described in the above embodiment. Therefore, this polishing machine possesses all the technical features and beneficial effects of the aforementioned polishing slurry recovery and circulation system, which will not be elaborated further.

[0037] The beneficial effects of the polishing slurry recovery and circulation system and the polishing machine provided in this application are at least as follows:

[0038] This application discloses a polishing machine slurry recycling system and a polishing machine. The polishing machine slurry recycling system includes a recycling filter tank, a level sensor, and a replenishment component. The recycling filter tank receives and filters wastewater from the machine. The level sensor is installed in the recycling filter tank and monitors the warning level. The replenishment component is connected to the recycling filter tank and replenishes the tank with water. This application utilizes a level sensor to monitor the water level of the polishing machine slurry, preventing crystallization. The recycling filter tank facilitates the recycling and reuse of the polishing slurry, reducing production costs. Attached Figure Description

[0039] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0040] Figure 1 This is a structural block diagram of the polishing slurry recovery and circulation system provided in an embodiment of this application;

[0041] Figure 2 A structural block diagram of a specific embodiment of the polishing machine slurry recovery and circulation system provided in this application;

[0042] Figure 3 This is a schematic diagram illustrating the working principle of the polishing slurry recovery and circulation system provided in an embodiment of this application.

[0043] Figure 4 This is a schematic diagram of the structure of the recycling filter box provided in the embodiments of this application;

[0044] Figure 5 This is a schematic diagram of the internal structure of the recycling filter box provided in an embodiment of this application;

[0045] Figure 6 This is a schematic diagram of the structure of the machine provided in an embodiment of this application.

[0046] The following are the labeling elements in the figure:

[0047] 100. Recycling filter box; 200. Liquid level sensor; 300. Replenishment assembly; 400. Machine base; 110. Filter box body; 120. Water receiving tray; 130. Drain pipe; 140. Primary filter assembly; 150. Secondary filter assembly; 160. Liquid cooling assembly; 170. Water pump; 180. Moving mechanism; 190. Handle; 141. Filter screen; 142. Water inlet; 151. Triple filter cotton; 181. Casters; 101. Solution chamber; 102. Water inlet area; 103. Filtration area; 104. Cooling area; 105. Liquid extraction area; 106. Step section; 107. First plane; 108. Second plane; 109. Vertical connecting surface; 310. Water inlet pipe; 320. Water pipe control valve; 330. Controller; 121. Water outlet. Detailed Implementation

[0048] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0049] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it may be directly or indirectly located on that other component. When a component is referred to as "connected to" another component, it may be directly or indirectly connected to that other component. The terms "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate orientations or positions based on the accompanying drawings, and are for ease of description only, and should not be construed as limiting the technical solution. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features. "A plurality" means two or more, unless otherwise explicitly defined.

[0050] Example 1:

[0051] Please see Figure 1 This embodiment provides a polishing machine grinding fluid recycling system, which includes: a recycling filter box 100, a liquid level sensor 200, and a replenishment component 300. The recycling filter box 100 is used to receive wastewater from the machine 400 and filter the wastewater from the machine 400. The liquid level sensor 200 is installed in the recycling filter box 100 and is used to monitor the warning liquid level of the recycling filter box 100. The replenishment component 300 is connected to the recycling filter box 100 and is electrically connected to the liquid level sensor 200. The replenishment component 300 is used to replenish the water in the recycling filter box 100.

[0052] In existing technologies, grinding fluids are used and recycled, especially in 400-meter (mill) machines. Figure 6 The rotation of the spindle (as shown in the diagram) atomizes the water in the polishing slurry, causing the water content of the slurry to gradually decrease. As the polishing slurry is reused, the water content decreases until it eventually crystallizes and becomes unusable.

[0053] In this embodiment, the liquid level sensor 200 monitors the liquid level of the recovery filter tank 100 and transmits the liquid level information of the recovery filter tank 100 to the replenishment component 300, which replenishes the recovery filter tank 100 with water. When the liquid level sensor 200 detects that the liquid level of the recovery filter tank 100 is lower than the set water level, it can control the replenishment component 300 to replenish the recovery filter tank 100 with water, so that the grinding fluid in the recovery filter tank 100 does not crystallize, which can extend the service life of the grinding fluid and reduce the production cost of the enterprise.

[0054] Therefore, in this embodiment, the polishing slurry is monitored by a level sensor 200 to prevent crystallization. The polishing slurry is recycled through a recovery filter box 100, thereby reducing production costs.

[0055] Specifically, please refer to Figure 2 The replenishment component 300 includes: an inlet pipe 310 and a water pipe control valve 320. The inlet pipe 310 is connected to the recycling filter box 100. The water pipe control valve 320 is installed on the inlet pipe 310 and is used to control the inlet pipe 310.

[0056] In this embodiment, when the liquid level sensor 200 detects that the liquid level in the recovery filter box 100 is lower than the set water level, the water pipe control valve 320 can control the water inlet pipe 310 to replenish water to the recovery filter box 100 to prevent the grinding fluid from crystallizing, thereby extending the service life of the grinding fluid and reducing the production cost of the enterprise. For example, the replenishment component 300 may include: a controller 330, a water inlet pipe 310, and a water pipe control valve 320. The controller 330 is electrically connected to the liquid level sensor 200 and the water pipe control valve 320, respectively. The liquid level sensor 200 can monitor the real-time liquid level of the recovery filter tank 100 and transmit the monitoring data to the controller 330. The controller 330 can analyze and determine whether the real-time liquid level of the recovery filter tank 100 has reached the set water level. When the real-time liquid level of the recovery filter tank 100 reaches the set water level, the controller 330 can control the water pipe control valve 320 to open, so that the water inlet pipe 310 replenishes water to the recovery filter tank 100. The controller 330 and the water pipe control valve 320 can be understood as prior art, and the specific structure of the controller 330 and the water pipe control valve 320 will not be described in detail.

[0057] Specifically, the warning liquid level includes a lower limit liquid level and an upper limit liquid level. When the recovery filter box 100 is at the lower limit liquid level, the replenishment component 300 replenishes the recovery filter box 100 with water. When the recovery filter box 100 is at the upper limit liquid level, the replenishment component 300 stops replenishing the recovery filter box 100 with water.

[0058] In this embodiment, the warning liquid level can include a lower limit liquid level and an upper limit liquid level. For example, when the recovery filter tank 100 reaches the lower limit liquid level, the water pipe control valve 320 can control the water inlet pipe 310 to replenish water to the recovery filter tank 100, so that the actual liquid level of the recovery filter tank 100 rises; when the recovery filter tank 100 reaches the upper limit liquid level, the controller 330 can control the water pipe control valve 320 to close, thereby controlling the water inlet pipe 310 to stop replenishing water, so as to prevent the actual liquid level of the recovery filter tank 100 from continuing to rise.

[0059] Specifically, please refer to Figure 3 The recycling filter box 100 includes: a filter box body 110, a water receiving tray 120, and a drain pipe 130. The water receiving tray 120 is connected to the filter box body 110 and is used to receive wastewater from the machine 400 and transport the wastewater from the machine 400 to the filter box body 110. The drain pipe 130 is connected to the filter box body 110 and is used to transport the grinding fluid from the filter box body 110 to the machine 400.

[0060] In this embodiment, the water receiving tray 120 can be located below the main shaft of the machine 400, and the filter box body 110 is located at the water outlet 121 of the water receiving tray 120. Figure 6 Below (as shown), the water receiving tray 120 is used to collect the wastewater discharged from the machine 400 and transport the wastewater to the filter box body 110 through the water outlet 121. After the wastewater is filtered and purified by the filter box body 110, it is then transported to the machine 400 through the drain pipe 130 to realize the recycling of the grinding fluid.

[0061] Specifically, please refer to Figure 4 and Figure 5The filter box body 110 has a solution chamber 101, which is sequentially provided with a water inlet area 102, a filtration area 103, a cooling area 104, and a liquid extraction area 105. The recovery filter box 100 also includes a primary filtration component 140, a secondary filtration component 150, a liquid cooling component 160, and a water pump 170. The primary filtration component 140 is located in the water inlet area 102 and is used to communicate with the replenishment component 300. The secondary filtration component 150 is located in the filtration area 103 and is used to filter the solution in the recovery filter box 100. The liquid cooling component 160 is located inside the filter box body 110 and is used to cool the solution in the recovery filter box 100. The water pump 170 is located in the liquid extraction area 105 and is used to transport the grinding fluid in the liquid extraction area 105 to the drain pipe 130.

[0062] In this embodiment, the filter box body 110 is provided with a water inlet area 102, a filtration area 103, a cooling area 104, and a liquid extraction area 105 in sequence. The primary filtration component 140, the secondary filtration component 150, the liquid cooling component 160, and the water pump 170 are respectively arranged in the water inlet area 102, the filtration area 103, the cooling area 104, and the liquid extraction area 105. That is, the wastewater on the machine 400 is collected by the water receiving tray 120 and enters the water inlet area 102. After being initially filtered by the primary filtration component 140, it enters the secondary filtration component 150 for further filtration and purification. After being liquid cooled, it flows into the liquid extraction area 105 and is then discharged through the drain pipe 130 by the water pump 170. This can realize the recycling of polishing liquid, reduce the amount of polishing powder used, reduce material costs, reduce wastewater discharge, and help protect the environment and reduce pollution.

[0063] The recycling filter box also includes a moving mechanism 180 composed of multiple moving wheels 181, which is located on the filter box body 110.

[0064] In this embodiment, the filter box body 110 and the machine base 400 are detachably connected. The filter box body 110 is easy to assemble and disassemble, facilitating the maintenance and replacement of the filter box. For example, if the secondary filter assembly 150 or the water pump 170 is damaged, the filter box body 110 can be removed from the machine base 400, and then the secondary filter assembly 150 or the water pump 170 can be repaired or replaced. Meanwhile, the filter box body 110 is equipped with multiple casters 181, allowing it to be pushed into or pulled out of the machine base 400. Therefore, the moving mechanism 180 composed of multiple casters 181 facilitates transportation, is simple to operate, and is convenient to use.

[0065] Specifically, the recycling filter box also includes a handle 190, which is disposed on the filter box body 110.

[0066] In this embodiment, the handle 190 can assist in transporting the filter box body 110. For example, the handle 190 can be used in conjunction with the casters 181, allowing the filter box body 110 to be moved by pushing or pulling. Alternatively, the handle 190 can be used to hoist the filter box body 110, facilitating its movement and transportation.

[0067] Specifically, the primary filtration assembly 140 includes: a filter screen 141, which is disposed in the water inlet area 102 and has a water inlet 142, which is connected to the supply assembly 300 and the water receiving tray 120 respectively.

[0068] The secondary filtration assembly 150 includes a triple filter cotton 151, which is disposed in the filtration zone 103. The triple filter cotton 151 is used to filter the solution from the filter screen 141 and transport the filtered solution to the cooling zone 104.

[0069] In this embodiment, after the wastewater enters the filter box body 110, it needs to undergo primary filtration combined with secondary filtration. The primary filter component 140 can filter out larger particles in the wastewater. The primary filter component 140 helps to reduce the burden on the subsequent secondary filter component 150 and can extend the service life of the entire polishing machine grinding fluid recycling system. The secondary filter component 150 has higher filtration efficiency and can further remove impurities in the wastewater. Through the secondary filter component 150, the wastewater can meet the grinding fluid usage standards, that is, the wastewater is filtered and converted into grinding fluid, which can realize the recycling of grinding fluid.

[0070] The primary filtration component 140 includes a filter screen 141, which is used to filter wastewater after it enters the inlet zone 102 and then enters the secondary filtration component 150. The filter screen 141 can filter out larger particles in the wastewater. For example, the filter screen 141 can be configured as a filter box with an opening, which is equivalent to the inlet 142 of the filter screen 141. The filter box is surrounded by closed side plates, and a screen plate with a guide is located at the bottom of the filter box. Wastewater enters the filter box from the inlet 142 and then flows out through the screen plate at the bottom, while impurities or larger particles in the wastewater are blocked by the screen plate and the side plates.

[0071] The secondary filter element 150 includes a triple filter cotton 151, meaning that the secondary filter element 150 is made of triple filter cotton 151. The triple filter cotton 151 has excellent filtration performance and can efficiently remove fine particulate matter and pollutants from wastewater. Furthermore, the triple filter cotton 151 is composed of multiple layers of composite materials, thus it has good stability and durability and can be used for a long time without being easily damaged.

[0072] Specifically, a step portion 106 is provided between the filtration zone 103 and the cooling zone 104. The step portion 106 includes a first plane 107, a second plane 108 and a vertical connecting surface 109. The first plane 107, the vertical connecting surface 109 and the second plane 108 are connected in sequence to form a step structure, and the height of the first plane 107 is higher than the height of the second plane 108.

[0073] A step 106 is provided between the filtration zone 103 and the cooling zone 104, and one side of the filtration zone 103 is higher than the other side of the cooling zone 104. This allows the grinding fluid to flow smoothly into the liquid cooling zone after filtration, and prevents wastewater from accumulating and depositing on the water inlet zone 102 side. The step 106 also serves to facilitate the flow of the filter box body 110.

[0074] Example 2:

[0075] This embodiment provides a polishing machine, which includes the polishing slurry recovery and circulation system described in the above embodiment. Therefore, this polishing machine possesses all the technical features and beneficial effects of the aforementioned polishing slurry recovery and circulation system, which will not be elaborated further.

[0076] In summary, this application discloses a polishing machine slurry recycling system and a polishing machine. The polishing machine slurry recycling system includes a recycling filter tank, a level sensor, and a replenishment component. The recycling filter tank receives and filters wastewater from the machine. The level sensor is installed in the recycling filter tank to monitor the warning level. The replenishment component is connected to the recycling filter tank and replenishes the tank with water. This application utilizes a level sensor to monitor the water level of the polishing machine slurry, preventing crystallization. The recycling filter tank facilitates the recycling and reuse of the polishing slurry, reducing production costs.

[0077] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A polishing machine slurry recovery and recycling system characterized by, The polishing machine slurry recovery and recycling system comprises: a recovery filter box for receiving and filtering wastewater of a machine table; a liquid level sensor arranged in the recovery filter box for monitoring a pre-warning liquid level of the recovery filter box; a replenishment assembly in communication with the recovery filter box and electrically connected with the liquid level sensor, the replenishment assembly being configured to replenish water in the recovery filter box.

2. The polishing machine slurry recovery and recycling system of claim 1, wherein, The replenishment assembly comprises: a water inlet pipe in communication with the recovery filter box; a water pipe control valve arranged in the water inlet pipe for controlling the water inlet pipe.

3. The polishing machine slurry recovery and recycling system of claim 1, wherein, The pre-warning liquid level comprises: a lower limit liquid level, when the recovery filter box is in the lower limit liquid level state, the replenishment assembly replenishes water in the recovery filter box; an upper limit liquid level, when the recovery filter box is in the upper limit liquid level state, the replenishment assembly stops replenishing water in the recovery filter box.

4. The polishing machine slurry recovery and recycling system of claim 1, wherein, The recovery filter box comprises: a filter box body; a water receiving tray in communication with the filter box body, the water receiving tray being configured to receive wastewater of the machine table and deliver the wastewater of the machine table to the filter box body; a drain pipe in communication with the filter box body, the drain pipe being configured to deliver slurry in the filter box body to the machine table.

5. The polishing machine slurry recovery and recycling system according to claim 4, wherein: the filter box body has a solution cavity, the solution cavity being sequentially provided with a water inlet area, a filtering area, a cooling area and a slurry pumping area; the recovery filter box further comprises: a primary filter assembly provided in the water inlet area, the primary filter assembly being configured to communicate with the replenishment assembly; a secondary filter assembly arranged in the filtering area, the secondary filter assembly being configured to filter the solution in the recovery filter box; a liquid cooling assembly arranged in the filter box body, the liquid cooling assembly being configured to cool the solution in the recovery filter box; a slurry pumping pump arranged in the slurry pumping area, the slurry pumping pump being configured to deliver slurry in the slurry pumping area to the drain pipe.

6. The polishing machine slurry recovery and recycling system of claim 5, wherein, The recovery filter box further comprises: a moving mechanism composed of a plurality of moving wheels, the moving mechanism being arranged in the filter box body.

7. The polishing machine slurry recovery and recycling system of claim 5, wherein, The recovery filter box further comprises: a handle arranged in the filter box body.

8. The polishing machine slurry recovery and recycling system of claim 5, wherein, The primary filter assembly comprises: a filter screen arranged in the water inlet area, the filter screen being provided with a water inlet port, the water inlet port being in communication with the replenishment assembly and the water receiving tray respectively; the secondary filter assembly comprises triple filter cotton, the triple filter cotton being arranged in the filtering area, the triple filter cotton being configured to filter the solution from the filter screen and deliver the filtered solution to the cooling area.

9. The polishing machine slurry recovery and recycling system of claim 5, wherein, A step part is arranged between the filtering area and the cooling area, the step part comprises a first plane, a second plane and a vertical connecting surface, the first plane, the vertical connecting surface and the second plane are connected in sequence to form a step structure, and the height of the first plane is higher than the height of the second plane.

10. A polishing machine characterized by, The polishing machine comprises the polishing machine abrasive liquid recycling circulating system according to any one of claims 1-9.

Citation Information

Patent Citations

  • Grinding fluid recovery device of liquid crystal panel polishing machine

    CN217702988U