Polishing device for plastic mold machining

Abstract

The utility model relates to the technical field of plastic mould processing, in particular to a polishing device for plastic mould processing, which comprises a machine table, the fixed box is fixedly mounted on the machine table; the fixing mechanism is used for fixing the plastic mold; the polishing mechanism is used for polishing the plastic mold; the fixing mechanism comprises a positioning plate; the movable seat is mounted on the machine table in a sliding manner; the supporting cylinder is fixedly mounted at the top of the movable seat; and the transmission rack is fixedly mounted at the bottom of the movable seat. According to the utility model, through the arrangement of the fixing mechanism, the plastic mold is automatically clamped and fixed while being automatically fed, and the fixed state of the plastic mold is automatically released while being automatically discharged after the plastic mold is polished, so that manual fixation is not needed, the working efficiency is improved, and the labor intensity of workers is reduced. And the use safety is improved.

Description

Technical Field

[0001] This utility model relates to the field of plastic mold processing technology, and specifically to a grinding device for plastic mold processing. Background Technology

[0002] Plastic molds are a type of combined mold used in compression molding, extrusion molding, injection molding, blow molding, and low-foaming molding. The coordinated changes of the mold's punch, die, and auxiliary molding system allow for the production of a series of plastic parts of different shapes and sizes. Plastic molds are the mother of industry; the launch of new products always involves plastics, and the production process of plastic molds requires grinding and polishing.

[0003] Chinese patent application CN202221501403.0 discloses a mold grinding and positioning device for plastic mold production, including a base plate, a top plate above the base plate, a second motor fixedly mounted on the top of the top plate, a second lead screw fixedly mounted on the output shaft of the second motor, the second lead screw passing through the top plate, a sliding plate threaded to the outer side of the second lead screw, and a cylindrical groove fixedly mounted between the top plate and the base plate. The cylindrical groove has first sliding grooves on its front and rear sides for sliding connection with the sliding plate. This invention utilizes the cooperation between components such as the first lead screw, the extrusion plate, the second sliding groove, the grinding roller, and the first motor. By rotating the first lead screw, the extrusion plate is positioned by the second sliding groove. The first motor drives the second lead screw to rotate, thereby moving the grinding roller closer to the mold for grinding, achieving the effect of accelerating grinding efficiency and reducing danger.

[0004] The aforementioned utility model requires manual fixing of the plastic mold during grinding, which is inefficient. Furthermore, workers need to be close to the grinding machine when fixing the plastic mold, posing a safety hazard.

[0005] Therefore, it is necessary to provide a new technical solution to overcome the above-mentioned defects. Utility Model Content

[0006] The purpose of this utility model is to provide a grinding device for plastic mold processing that can effectively solve the above-mentioned technical problems.

[0007] To achieve the purpose of this utility model, the following technical solution is adopted:

[0008] A grinding device for processing plastic molds includes: a machine base; a fixed box fixedly installed on the machine base; a fixing mechanism for fixing the plastic mold; and a grinding mechanism for grinding the plastic mold.

[0009] The fixing mechanism includes: a positioning plate; a movable seat slidably mounted on the machine base; a support cylinder fixedly mounted on the top of the movable seat; a transmission rack fixedly mounted on the bottom of the movable seat; a transmission gear meshing with the transmission rack; a driven bevel gear coaxially connected to the transmission gear; a driving bevel gear meshing with the driven bevel gear; a drive unit that drives the driving bevel gear to rotate; a fixing frame fixedly mounted on the machine base; a liquid storage tube; a piston plate slidably mounted inside the liquid storage tube; a clamping rod fixedly connected to the piston plate; a clamping plate fixedly connected to the clamping rod; a return spring that drives the clamping plate to reset; and a liquid supply unit that supplies hydraulic oil to the liquid storage tube.

[0010] Furthermore, the drive unit includes: a threaded rod rotatably mounted on the fixed box; a power source for driving the threaded rod to rotate; a movable frame threadedly connected to the threaded rod; a movable rod fixedly connected to the movable frame; a movable tube fixedly connected to the movable rod; a rotating rod rotatably mounted on the fixed box and the machine base; a guide groove formed on the rotating rod; and a rolling element rotatably mounted in the movable tube.

[0011] Furthermore, the liquid supply unit includes: a piston plate two slidably installed inside the support cylinder; a fixing rod fixedly connected to the piston plate two; and a liquid guide pipe connecting the support cylinder and the liquid storage pipe.

[0012] Furthermore, the fixing mechanism also includes: a jet head; and a gas guide pipe connecting the jet head and the liquid storage pipe.

[0013] Furthermore, the grinding mechanism includes: a grinding machine body; an adjustment component for adjusting the position of the grinding machine body; a liquid storage tank fixedly installed on the movable frame; a pump body installed in the liquid storage tank; a spray head communicating with the pump body; and a liquid replenishment component for replenishing coolant into the liquid storage tank.

[0014] Furthermore, the liquid replenishment assembly includes: a fixed cylinder fixedly installed inside the fixed box; a piston plate three slidably installed inside the fixed cylinder; a filter box communicating with the fixed cylinder; a filter screen fixedly installed inside the filter box; and a stirring blade for stirring the coolant inside the filter box.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] This utility model discloses a grinding device for processing plastic molds. Through the setting of a fixing mechanism, it realizes automatic feeding and clamping of the plastic mold at the same time. After the plastic mold is ground, it realizes automatic discharge and automatic release of the fixing state of the plastic mold, eliminating the need for manual fixing, thereby improving work efficiency and safety. Attached Figure Description

[0017] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0018] Figure 1 This is a three-dimensional schematic diagram of a grinding device for processing plastic molds according to the present invention.

[0019] Figure 2 This is a cross-sectional view of a component of a grinding device for processing plastic molds according to this utility model.

[0020] Figure 3 This utility model relates to a grinding device for processing plastic molds. Figure 2 Enlarged view of point A in the middle.

[0021] Figure 4 This is a cross-sectional schematic diagram of the filter box, a component of a grinding device for processing plastic molds according to this utility model.

[0022] Figure 5 This utility model relates to a grinding device for processing plastic molds. Figure 4 Enlarged view of section B in the middle.

[0023] Figure 6 This utility model relates to a grinding device for processing plastic molds. Figure 4 Enlarged view of point C in the middle.

[0024] Figure 7 This is a cross-sectional schematic diagram of the component support cylinder of a grinding device for processing plastic molds according to this utility model.

[0025] Figure 8 This is a cross-sectional schematic diagram of the fixing cylinder of a grinding device for processing plastic molds according to this utility model.

[0026] In the diagram: 1. Machine base; 2. Fixing mechanism; 21. Positioning plate; 22. Moving component; 221. Movable seat; 222. Support cylinder; 223. Guide rod; 224. Transmission rack; 225. Transmission gear; 226. Driven bevel gear; 227. Driving bevel gear; 228. Drive unit; 2281. Threaded rod; 2282. Power source; 2283. Movable frame; 2284. Limiting component; 2285. Movable rod; 2286. Movable tube; 2287. Rotating rod; 2288. Guide groove; 2289. Rolling component; 23. Clamping assembly; 231. Fixed component. 1. Fixed frame; 232. Liquid storage pipe; 233. Piston plate one; 234. Clamping rod; 235. Clamping plate; 236. Return spring; 237. Liquid supply unit; 2371. Piston plate two; 2372. Fixed rod; 2373. Liquid guide pipe; 24. Air guide pipe; 25. Jet nozzle; 3. Grinding mechanism; 31. Grinding machine body; 32. Adjustment component; 33. Liquid spray head; 34. Liquid storage tank; 35. Pump body; 36. Liquid replenishment component; 361. Fixed cylinder; 362. Piston plate three; 363. Filter box; 364. Filter screen; 365. Stirring blade; 4. Fixed box. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0028] In the description of this utility model, it should be understood that the terms "center," "lateral," "longitudinal," "front," "rear," "left," "right," "upper," "lower," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. When a component is referred to as being "fixed to" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be an intermediate component at the same time. When a component is considered to be "set on" another component, it can be directly set on the other component or there may be an intermediate component at the same time. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only.

[0029] like Figures 1 to 8As shown, the present invention provides a grinding device for processing plastic molds, comprising: a machine base 1; a fixed box 4 fixedly installed on the machine base 1; a fixing mechanism 2 for fixing the plastic mold; and a grinding mechanism 3 for grinding the plastic mold.

[0030] The fixing mechanism 2 includes: a positioning plate 21, which is U-shaped; a moving component 22 for moving the positioning plate 21; and a clamping component 23 for clamping the plastic mold. The moving component 22 includes: a limiting opening on the machine base 1; a movable seat 221 slidably installed in the limiting opening; and a guide rod 223 for guiding and limiting the movable seat 221. The movable seat 221 is slidably installed on the guide rod 223, and both ends of the guide rod 223 are fixedly installed in the limiting opening. Two guide rods 223 are provided to improve the stability of the movable seat 221 during movement. The top of the seat 221 has two support cylinders 222, which are symmetrically arranged on the movable seat 221. The positioning plate 21 is fixedly installed on the top of the two support cylinders 222. The transmission rack 224 is fixedly installed at the bottom of the movable seat 221. The limiting rod limits the movable seat 221. The transmission gear 225 is meshed with the transmission rack 224 and is rotatably installed in the machine base 1. The driven bevel gear 226 is coaxially connected with the transmission gear 225. The driving bevel gear 227 is meshed with the driven bevel gear 226. The drive unit 228 drives the driving bevel gear 227 to rotate.

[0031] When fixing the plastic mold, the plastic mold is first placed in the positioning plate 21. The positioning plate 21 limits the movement of the plastic mold along its direction, preventing it from shifting and improving its stability during grinding. Then, the moving component 22 is activated to move the plastic mold to the grinding location. The drive unit 228 includes: a threaded rod 2281 rotatably mounted on the fixed box 4; a power source 2282 that drives the threaded rod 2281 to rotate, which is fixedly mounted on the fixed box 4; a movable frame 2283 threadedly connected to the threaded rod 2281, with a sliding opening in the fixed box 4, in which the movable frame 2283 is slidably mounted; and a limiting member 2284 that limits the movement of the movable frame 2283, which includes a limiting rod that penetrates the movable frame 2283. Both ends of the limiting rod are fixedly installed inside the fixed box 4; the guide rail is fixedly installed on the fixed box 4; the slider is slidably installed on the guide rail, and the slider is fixedly connected to the movable frame 2283; the movable frame 2283 moves axially along the threaded rod 2281 through the limiting action of the limiting member 2284; the movable rod 2285 is fixedly connected to the movable frame 2283; the movable tube 2286 is fixedly connected to the movable rod 2285; the rotating rod 2287 is rotatably installed on the fixed box 4 and the machine base 1, the movable tube 2286 is sleeved on the outside of the rotating rod 2287, and the driving bevel gear 227 is fixedly sleeved on the rotating rod 2287; the guide groove 2288 is opened on the rotating rod 2287, the guide groove 2288 is composed of a spiral groove and a straight groove, and the spiral groove and the straight groove are connected; the rolling member 2289 is rotatably installed in the movable tube 2286; the rolling member 2289 is rotatably installed in the guide groove 2288.

[0032] Specifically, the starting power source 2282 drives the threaded rod 2281 to rotate, the threaded rod 2281 drives the movable frame 2283 to move downward, the movable frame 2283 drives the movable rod 2285 to move downward, the movable rod 2285 drives the movable tube 2286 to move downward, and the movable tube 2286 drives the rolling element 2289 to move downward, causing the rolling element 2289 to roll within the guide groove 2288. Since the guide groove 2288 is composed of a spiral groove and a straight groove, and the spiral groove and the straight groove are connected, the rolling element 2289 first rolls within the spiral groove. This drives the rotating rod 2287 to rotate, which in turn drives the driving bevel gear 227 to rotate. The driving bevel gear 227 drives the driven bevel gear 226 to rotate, which in turn drives the transmission gear 225 to rotate. The transmission gear 225 drives the transmission rack 224 to move, which in turn drives the movable seat 221 to move. The movable seat 221 drives the support cylinder 222 to move, which in turn drives the positioning plate 21 to move. This allows the plastic mold to be moved to the grinding area, thus achieving automatic feeding of the plastic mold.

[0033] When the plastic mold moves to the grinding area, the rolling element 2289 enters the straight groove, and the rotating rod 2287 stops rotating, thus stopping the plastic mold from moving. At the same time, the movable frame 2283 continues to move downward, thereby driving the grinding mechanism 3 to move downward and grinding the plastic mold.

[0034] After grinding is completed, the power source 2282 is started to rotate in reverse, which causes the movable frame 2283 to move upward, thereby driving the grinding mechanism 3 to reset upward. At the same time, the positioning plate 21 can be reset, thus realizing the discharge of the ground plastic mold, which is convenient for removing the ground plastic mold and replacing the plastic mold to be ground.

[0035] It should be noted that the power source 2282 is preferably an electric motor; the rolling element 2289 is preferably a bullseye ball bearing.

[0036] The clamping assembly 23 includes: a fixed frame 231 fixedly mounted on the machine base 1; a sliding frame fixedly mounted on the support cylinder 222, a liquid storage tube 232 fixedly mounted on the sliding frame, and the liquid storage tube 232 slidably mounted on the fixed frame 231 via the sliding frame; a piston plate 233 slidably mounted inside the liquid storage tube 232, the piston plate 233 dividing the liquid storage tube 232 into two independent spaces, one space for storing air and the other space for storing hydraulic oil; and a clamping rod 234 fixedly connected to the piston plate 233, the clamping rod 234 penetrating through the side wall of the liquid storage tube 232, and a sealing ring installed at the penetration point of the liquid storage tube 232, thereby reducing the amount of air inside the liquid storage tube 232. Gas is discharged from the through-hole of the liquid storage pipe 232; a clamping plate 235 is fixedly connected to the clamping rod 234; a return spring 236 drives the clamping plate 235 to return to its original position, one end of the return spring 236 is fixedly connected to the piston plate 233, and the other end of the return spring 236 is fixedly connected to the inner wall of the liquid storage pipe 232; a liquid supply unit 237 for supplying hydraulic oil into the liquid storage pipe 232; the liquid supply unit 237 includes: a piston plate 2371 slidably installed in the support cylinder 222; a fixing rod 2372 fixedly connected to the piston plate 2371, and the fixing rod 2372 is fixedly connected to the fixing frame 231; and a liquid guide pipe 2373 connecting the support cylinder 222 and the liquid storage pipe 232.

[0037] As the positioning plate 21 moves the plastic mold toward the grinding area, the two sets of support cylinders 222 move synchronously, causing the piston plate 2371 to slide within the support cylinder 222. This squeezes the hydraulic oil within the support cylinder 222, and the hydraulic oil enters the reservoir pipe 232 through the guide pipe 2373. As the hydraulic oil in the reservoir pipe 232 gradually increases, the hydraulic oil exerts a squeezing force on the piston plate 233. The piston plate 233 moves the clamping rod 234 and causes the return spring 236 to deform. The clamping rod 234 moves the clamping plate 235. When the positioning plate 21 moves the plastic mold to the grinding area, the two clamping plates 235 come into contact with the plastic mold, thus achieving clamping and fixing of the plastic mold. This further improves the stability of the plastic mold during grinding and prevents the plastic mold from shifting during grinding, which would affect the grinding accuracy.

[0038] When the plastic mold moves to the grinding area, the clamping plate 235 clamps and fixes the plastic mold. At this time, the rolling element 2289 enters the straight groove, and the rotating rod 2287 stops rotating, thus preventing the plastic mold from moving. That is, the support cylinder 222 stops moving, thereby stopping the supply of hydraulic oil to the liquid storage pipe 232, so that the clamping plate 235 maintains the clamping state of the plastic mold. At the same time, the movable frame 2283 continues to move downward, thereby driving the grinding mechanism 3 to grind the plastic mold downward, thus realizing the automatic grinding of the plastic mold by the grinding mechanism 3.

[0039] After the plastic mold is polished, the power source 2282 is started and rotated in the reverse direction, which causes the movable frame 2283 to move upward, thereby driving the polishing mechanism 3 to reset upward. At the same time, the support cylinder 222 can be reset. At this time, the piston plate 2371 slides again in the support cylinder 222 and generates suction, thereby drawing the hydraulic oil in the reservoir pipe 232 into the support cylinder 222 through the guide pipe 2373. At this time, the spring force of the reset spring 236 can drive the piston plate 233 to reset, thereby driving the clamping plate 235 to reset, so that the clamping plate 235 releases the clamping state of the plastic mold. At the same time, the support cylinder 222 drives the positioning plate 21 to reset, thereby realizing the discharge of the polished plastic mold, which is convenient for removing the polished plastic mold and replacing the plastic mold to be polished.

[0040] By setting up the fixing mechanism 2, the plastic mold is automatically fed and clamped at the same time. After the plastic mold is polished, it is automatically discharged and the fixing state of the plastic mold is automatically released, eliminating the need for manual fixing. This improves work efficiency and safety.

[0041] In this invention, through the cooperation of the grinding mechanism 3 and the fixing mechanism 2, the power source 2282 is started to rotate, which drives the grinding mechanism 3 to move downward and simultaneously drives the automatic feeding of the plastic mold. At the same time, the two clamping plates 235 move closer to each other. When the plastic mold moves to the grinding position, the clamping and fixing of the plastic mold is completed. At this time, the grinding mechanism 3 continues to move downward to achieve the grinding of the plastic mold.

[0042] After grinding is completed, the power source 2282 is started to rotate in the reverse direction. While driving the grinding mechanism 3 to reset upward, it also drives the plastic mold to automatically discharge. At the same time, the two clamping plates 235 move away from each other, releasing the clamping state on the plastic mold.

[0043] The fixing mechanism 2 also includes: a jet head 25, which is fixedly installed on the sliding frame; and a gas guide pipe 24 connecting the jet head 25 and the liquid storage pipe 232.

[0044] When the support cylinder 222 moves toward the grinding area, the piston plate 233 slides inside the liquid storage tube 232, thereby compressing the air inside the liquid storage tube 232. The air enters the jet nozzle 25 through the air guide tube 24 and is sprayed onto the surface of the plastic mold, thereby cleaning the dust on the surface of the plastic mold. This achieves pretreatment of the plastic mold before grinding and improves the grinding effect.

[0045] The grinding mechanism 3 includes: a grinding machine body 31; an adjustment component 32 for adjusting the position of the grinding machine body 31, the adjustment component 32 consisting of a linear movement module one fixedly mounted on the movable frame 2283 and a linear movement module two fixedly mounted on the linear movement module one; the grinding machine body 31 is fixedly mounted on the linear movement module two; the linear movement module one can drive the grinding machine body 31 to move longitudinally, and the linear movement module two can drive the grinding machine body 31 to move laterally, thereby expanding the grinding range of the grinding machine body 31; a liquid storage tank 34 fixedly mounted on the movable frame 2283; a pump body 35 installed in the liquid storage tank 34; and a spray head 33 connected to the pump body 35, the spray head 33 being connected to the pump body 35 through a connecting pipe, and the spray head 33 being fixedly mounted on the adjustment component 32, so that it can move with the movement of the grinding machine body 31. This ensures that the coolant is always sprayed onto the polished area of ​​the plastic mold; a replenishing component 36 replenishes the coolant into the reservoir 34; the replenishing component 36 includes: a fixed cylinder 361 fixedly installed in the fixed box 4; a piston plate 362 slidably installed in the fixed cylinder 361, the piston plate 362 being fixedly sleeved on the outside of the movable tube 2286; a filter box 363 connected to the fixed cylinder 361, the fixed cylinder 361 being connected to the filter box 363 through an inlet pipe, the fixed cylinder 361 being connected to the reservoir 34 through a reservoir pipe 232, a first one-way valve being installed on the inlet pipe, and a second one-way valve being installed on the outlet pipe; a filter screen 364 fixedly installed in the filter box 363; and a stirring blade 365 for stirring the coolant in the filter box 363, the bottom end of the rotating rod 2287 extending into the filter box 363, and the stirring blade 365 being fixedly installed on the rotating rod 2287.

[0046] When the grinding machine body 31 grinds the plastic mold, the pump body 35 is activated to deliver the coolant in the liquid storage tank 34 to the spray head 33, and spray it onto the grinding area of ​​the plastic mold through the spray head 33, thereby cooling the plastic mold and washing away the debris generated during the grinding process, thus improving the grinding effect.

[0047] When the movable tube 2286 moves downward, it can drive the piston plate 362 to slide downward in the fixed cylinder 361. At this time, the first one-way valve is closed and the second one-way valve is opened. The coolant in the fixed cylinder 361 is squeezed and enters the storage tank 34 through the outlet pipe, thereby realizing the automatic replenishment of coolant in the storage tank 34, preparing for the subsequent cooling of the plastic mold.

[0048] When the movable tube 2286 moves upward, it can drive the piston plate 362 to slide upward in the fixed cylinder 361. At this time, the first one-way valve opens and the second one-way valve closes. The coolant in the filter box 363 is drawn into the fixed cylinder 361 through the inlet pipe, which prepares for the subsequent replenishment of coolant in the storage tank 34.

[0049] The coolant mixed with debris sprayed through the spray nozzle 33 flows into the filter box 363 through the limiting opening. The debris in the coolant can be filtered by the filter screen 364. The filtered coolant is then recycled, thereby improving the utilization rate of the coolant.

[0050] A cold source is installed on the filter box 363 to cool the coolant inside the filter box 363. As the movable tube 2286 moves up and down, it drives the rotating rod 2287 to rotate. The rotating rod 2287 drives the stirring blade 365 to rotate. The rotation of the stirring blade 365 can stir the coolant, so that the coolant is cooled evenly and the cooling effect on the plastic mold is guaranteed.

[0051] It should be noted that Linear Motion Module 1 and Linear Motion Module 2 are common linear motion modules on the market.

[0052] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. In addition, the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0053] It should be understood that those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A grinding device for processing plastic molds, characterized in that, include: Machine tool; A fixed box that is fixedly installed on the machine base; A fixing mechanism for securing plastic molds; A grinding mechanism for grinding plastic molds; The fixing mechanism includes: a positioning plate; a movable seat slidably mounted on the machine base; a support cylinder fixedly mounted on the top of the movable seat; a transmission rack fixedly mounted on the bottom of the movable seat; a transmission gear meshing with the transmission rack; a driven bevel gear coaxially connected to the transmission gear; a driving bevel gear meshing with the driven bevel gear; a drive unit that drives the driving bevel gear to rotate; a fixing frame fixedly mounted on the machine base; a liquid storage tube; a piston plate slidably mounted inside the liquid storage tube; a clamping rod fixedly connected to the piston plate; a clamping plate fixedly connected to the clamping rod; a return spring that drives the clamping plate to reset; and a liquid supply unit that supplies hydraulic oil to the liquid storage tube.

2. The grinding device for plastic mold processing as described in claim 1, characterized in that, The drive unit includes: a threaded rod rotatably mounted on the fixed box; a power source for driving the threaded rod to rotate; a movable frame threadedly connected to the threaded rod; a movable rod fixedly connected to the movable frame; a movable tube fixedly connected to the movable rod; a rotating rod rotatably mounted on the fixed box and the machine base; a guide groove formed on the rotating rod; and a rolling element rotatably mounted in the movable tube.

3. The grinding device for plastic mold processing as described in claim 1, characterized in that, The liquid supply unit includes: a piston plate 2 slidably installed inside the support cylinder; a fixing rod fixedly connected to the piston plate 2; and a liquid guide pipe connecting the support cylinder and the liquid storage pipe.

4. The grinding device for plastic mold processing as described in claim 1, characterized in that, The fixing mechanism further includes: a jet head; and a gas guide pipe connecting the jet head and the liquid storage pipe.

5. A grinding device for processing plastic molds as described in claim 2, characterized in that, The grinding mechanism includes: a grinding machine body; an adjustment component for adjusting the position of the grinding machine body; a liquid storage tank fixedly installed on the movable frame; a pump body installed in the liquid storage tank; a spray head communicating with the pump body; and a liquid replenishment component for replenishing coolant into the liquid storage tank.

6. The grinding device for plastic mold processing as described in claim 5, characterized in that, The coolant replenishment assembly includes: a fixed cylinder fixedly installed inside the fixed box; a piston plate slidably installed inside the fixed cylinder; a filter box communicating with the fixed cylinder; a filter screen fixedly installed inside the filter box; and a stirring blade for stirring the coolant inside the filter box.

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