Surface grinding equipment for mold production

Abstract

The invention relates to the technical field of grinding, in particular to surface grinding equipment for mold production, which comprises a base, a fixing frame capable of moving up and down is arranged on the base, a grinding assembly is rotatably arranged on the fixing frame, the grinding assembly comprises a grinding cylinder, a first cleaning assembly is arranged in the grinding cylinder, and the first cleaning assembly comprises a first cleaning cylinder. The bottom of the first cleaning cylinder communicates with a first air bag, the first air bag is located below the polishing cylinder, the first cleaning cylinder is correspondingly provided with a first driving mechanism, and the first driving mechanism is used for inflating the first air bag to unfold or contract; a second cleaning assembly is coaxially arranged in the first cleaning cylinder and comprises a second cleaning cylinder, the bottom of the second cleaning cylinder communicates with a second air bag, the second cleaning cylinder is correspondingly provided with a second driving mechanism, the second driving mechanism enables the second air bag to be inflated to unfold or contract, the two air bags are alternately used, and the scrap cleaning effect is improved; the service life of the airbag is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of polishing, in particular to a surface polishing device for mold production. Background Art

[0002] The mold needs to be polished during the production process, and the mold usually has a large number of holes, so a grinding device is needed to mechanically grind the inner wall of the hole.

[0003] The patent document with announcement number CN117182682B discloses a processing device for aluminum casting production, wherein a grinding piece is fixedly connected to the lower side of the rotating frame, and also includes a first air cylinder, a piston frame and an air bag, wherein the first air cylinder is fixedly connected to the upper side of the grinding piece, the inner upper side of the first air cylinder is movably connected to the piston frame, the lower side of the first air cylinder is connected to the air bag, the air bag penetrates into the grinding piece, and the air bag is movably connected to the grinding piece, the gas in the first air cylinder is squeezed into the air bag through the piston frame, so that the air bag is inflated and tightly fits the inner wall of the hole, and the debris is pushed upward by the air bag, thereby preventing the debris from remaining in the hole; however, when the device is in use, the debris generated by grinding will fall into the gap between the air bag and the hole wall, thereby intensifying the friction between the air bag and the hole wall and greatly reducing the service life of the air bag; at the same time, the debris in the gap will fall into the hole, making it difficult to clean the debris. Summary of the invention

[0004] Based on this, it is necessary to provide a surface grinding device for mold production to address the problems of short airbag service life and difficulty in cleaning debris in current grinding devices.

[0005] The above purpose is achieved through the following technical solutions: A surface grinding device for mold production, comprising a base, the base is used to clamp and fix the mold, the base is provided with a fixed frame that can move up and down, the fixed frame is rotatably provided with a grinding assembly, the grinding assembly comprises a grinding cylinder, the outer peripheral surface of the grinding cylinder is provided with a grinding piece, the grinding piece is used to grind the hole wall of the mold, the interior of the grinding cylinder is provided with a first cleaning assembly, the first cleaning assembly comprises a first cleaning cylinder, the bottom of the first cleaning cylinder is connected to a first air bag, the first air bag is located below the grinding cylinder, so that debris generated by grinding can fall onto the first air bag, the first cleaning cylinder is correspondingly provided with a first driving mechanism, the first driving mechanism is used to expand or contract the first air bag; the interior of the first cleaning cylinder is coaxially provided with a second cleaning assembly, the second cleaning assembly comprises a second cleaning cylinder, the bottom of the second cleaning cylinder is connected to a second air bag, the second cleaning cylinder is correspondingly provided with a second driving mechanism, the second driving mechanism drives the second cleaning cylinder to extend from the bottom of the first cleaning cylinder, so that the second air bag is located below the first air bag and expands or contracts the second air bag.

[0006] Furthermore, a center hole and a plurality of first air holes distributed circumferentially around the center hole are provided inside the first cleaning cylinder, the second cleaning cylinder is anti-rotatingly assembled in the center hole, a first rotating plate is provided above the first cleaning cylinder, a plurality of first piston rods are provided at the bottom of the first rotating plate, the first piston rods correspond one-to-one to the first air holes, the first driving mechanism includes a first cylinder, the output end of the first cylinder is connected to a fixed plate, and the fixed plate corresponds to the first rotating plate up and down.

[0007] Furthermore, a second air hole is provided inside the second cleaning cylinder, a second rotating plate is provided above the second cleaning cylinder, a second piston rod is provided at the bottom of the second rotating plate, the second piston rod corresponds to the second air hole, the second driving mechanism includes a second cylinder, and the output end of the second cylinder is connected to the second rotating plate.

[0008] Furthermore, the fixed plate and the first rotating plate are both provided with through holes, and the output end of the second cylinder passes through the through holes into the central hole of the first cleaning cylinder and corresponds to the second rotating plate up and down.

[0009] Furthermore, a first magnetic ring is fixed to the outer circumferential surface of the first cleaning cylinder, a first magnetic chain is provided at the connection between the first airbag and the first cleaning cylinder, the first magnetic chain includes a first elastic rope, a plurality of first magnetic balls are evenly distributed on the first elastic rope, and the first magnetic ring corresponds to the first magnetic ball up and down and repel each other.

[0010] Furthermore, a second magnetic ring is fixed to the outer circumferential surface of the second cleaning cylinder, a second magnetic chain is provided at the connection between the second airbag and the second cleaning cylinder, the second magnetic chain includes a second elastic rope, a plurality of second magnetic balls are evenly distributed on the second elastic rope, and the second magnetic ring corresponds to the second magnetic ball up and down and repel each other.

[0011] Furthermore, the first cylinder and the second cylinder are both fixed on a fixing frame.

[0012] Furthermore, a spline groove is provided on the inner wall of the center hole, and a spline is provided on the outer peripheral surface of the second cleaning cylinder, and the spline is engaged with the spline groove in a rotation-stopping manner.

[0013] Furthermore, a return spring is provided between the spline and the bottom of the spline groove, and in an initial state, the return spring can shrink the second cleaning cylinder into the first cleaning cylinder.

[0014] Furthermore, the fixing frame is installed on the base through telescopic legs, and a driving motor is provided on the fixing frame, and the driving motor is used to drive the grinding cylinder to rotate.

[0015] The beneficial effects of the present invention are: The surface grinding equipment for mold production provided by the present invention, when the grinding component is grinding the hole wall of the mold, first controls the first airbag to be expanded through the first driving mechanism, so that the debris generated by grinding will fall on the first airbag, and then controls the first airbag to be contracted through the first driving mechanism, so that the contact point between the first airbag and the mold hole wall will approach the axis of the grinding cylinder, thereby driving the debris to approach the axis of the grinding cylinder, avoiding the accumulation of debris between the first airbag and the mold hole wall, and reducing the friction between the first airbag and the mold hole wall; then controls the second airbag to be expanded through the second driving mechanism, and the debris generated by grinding will fall on the second airbag, and the second driving mechanism The second airbag is controlled to contract so that the contact point between the second airbag and the mold hole wall will approach the axis of the grinding tube, thereby driving the debris to approach the axis of the grinding tube, avoiding most of the debris from accumulating between the second airbag and the mold hole wall, and reducing the friction between the second airbag and the mold hole wall; in this way, when the grinding assembly is removed from the mold hole, the first airbag and the second airbag can take out most of the debris, avoiding most of the debris between the first airbag and the mold hole wall, and between the second airbag and the mold hole wall from falling into the mold hole, thereby improving the debris cleaning effect; at the same time, the friction between the first airbag, the second airbag and the mold hole wall is reduced, and the service life of the first airbag and the second airbag is extended.

[0016] Secondly, two airbags are provided, and the first airbag and the second airbag can be used alternately or synchronously, which can extend the service life of the airbag compared to providing only one airbag.

[0017] Third, two airbags are provided so that most of the debris generated by grinding can be transported by the first airbag and the second airbag, and will not accumulate on only one airbag, thereby improving the efficiency of debris cleaning.

[0018] Fourthly, since the second airbag is located at a certain distance below the polishing piece, after the polishing piece extends out of the mold hole, the second airbag remains in the mold hole, thereby preventing debris from falling into the mold hole again. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of the three-dimensional structure of a surface grinding device for mold production provided by one embodiment of the present invention; Figure 2 A side view of a surface grinding device for mold production provided by one embodiment of the present invention; Figure 3 for Figure 2 Middle AA section view; Figure 4 for Figure 3 Enlarged image at the center X; Figure 5 for Figure 3 Enlarged view of Y in the middle; Figure 6An exploded view of the structure of a surface grinding device for mold production provided by one embodiment of the present invention; Figure 7 An exploded view of the structure of a grinding component in a surface grinding device for mold production provided by an embodiment of the present invention; Figure 8 for Figure 7 Enlarged view of the middle Z; Fig. 9 for Figure 7 Enlarged view at W in the middle; Fig.10 A first state diagram of a first airbag in a surface polishing device for mold production provided by an embodiment of the present invention; Fig.11 A second state diagram of the first airbag in the surface polishing device for mold production provided by one embodiment of the present invention; Fig.12 for Fig.10 A cross-sectional view of Fig.13 for Fig.11 sectional view of .

[0020] in: 100, base; 101, telescopic cylinder; 102, clamping plate; 200, mold; 300, fixed frame; 301, telescopic legs; 400, motor; 500, grinding assembly; 501, grinding head; 610, first cylinder; 620, second cylinder; 700, first cleaning assembly; 710, fixed plate; 720, first rotating plate; 721, first piston rod; 730, first cleaning barrel; 731, first air hole; 732, center hole; 740, first magnetic ring; 750, first magnetic chain; 751, first elastic rope; 760, first air bag; 761, first vertical section; 762, second vertical section; 800, second cleaning assembly; 810, second rotating plate; 811, second piston rod; 820, second cleaning barrel; 821, second air hole; 822, second air bag. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0022] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings). In the description of the present invention, it should be understood that the orientation or position relationship indicated by the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. are based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0023] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0024] like Figures 1 to 13As shown, a surface grinding device for mold production provided by an embodiment of the present invention includes a base 100, the base 100 is used to clamp and fix the mold 200, the base 100 is provided with four telescopic cylinders 101, the output end of the telescopic cylinder 101 is connected to a clamping plate 102, the clamping plate 102 is used to clamp the mold 200; the base 100 is provided with a fixed frame 300 that can move up and down, the fixed frame 300 is rotatably provided with a grinding assembly 500, the grinding assembly 500 includes a grinding cylinder, the outer peripheral surface of the grinding cylinder is provided with a grinding piece, the grinding piece is used to grind the hole wall of the mold 200, the interior of the grinding cylinder is provided with a first cleaning assembly 700, the first cleaning assembly 700 includes a first cleaning cylinder 730, the bottom of the first cleaning cylinder 730 The first cleaning barrel 730 is connected with a first airbag 760, which is located below the grinding barrel, so that the debris generated by grinding can fall onto the first airbag 760. The first cleaning barrel 730 is correspondingly provided with a first driving mechanism, which is used to expand or shrink the first airbag 760; the first cleaning barrel 730 is coaxially provided with a second cleaning assembly 800, which includes a second cleaning barrel 820, and the bottom of the second cleaning barrel 820 is connected with a second airbag 822, and the second cleaning barrel 820 is correspondingly provided with a second driving mechanism, which is used to extend the second cleaning barrel 820 from the bottom of the first cleaning barrel 730, so that the second airbag 822 is located below the first airbag 760, and expand or shrink the second airbag 822. In this embodiment, the grinding piece is a grinding head 501. The shape of the first airbag 760 is annular, so that the second cleaning barrel 820 can pass through, and the second airbag 822 is cylindrical.

[0025] Furthermore, the first cleaning cylinder 730 is provided with a central hole 732 and a plurality of first air holes 731 distributed circumferentially around the central hole 732, the second cleaning cylinder 820 is fixedly assembled in the central hole 732, a first rotating plate 720 is provided above the first cleaning cylinder 730, a plurality of first piston rods 721 are provided at the bottom of the first rotating plate 720, the first piston rods 721 correspond to the first air holes 731 one by one, the first driving mechanism includes a first cylinder 610, the output end of the first cylinder 610 is connected to a fixed plate 710, the fixed plate 710 corresponds to the first rotating plate 720 up and down. The extension of the first cylinder 610 drives the fixed plate 710 to move downward, and then drives the first rotating plate 720 to move downward, so that the first piston rod 721 squeezes the gas in the first air hole 731, so that the first airbag 760 is deployed.

[0026] Further, the second cleaning cylinder 820 is provided with a second air hole 821 inside, a second rotating plate 810 is provided above the second cleaning cylinder 820, a second piston rod 811 is provided at the bottom of the second rotating plate 810, the second piston rod 811 corresponds to the second air hole 821, and the second driving mechanism includes a second cylinder 620, and the output end of the second cylinder 620 is connected to the second rotating plate 810. The extension of the second cylinder 620 pushes the second rotating plate 810 to move downward, and since the second air bag 822 is contracted in the first cleaning cylinder 730, there is a certain air pressure in the second air hole 821, so that the downward movement of the second rotating plate 810 first drives the second cleaning cylinder 820 to slide along the central hole 732 of the first cleaning cylinder 730, until the second air bag 822 extends from the bottom of the first cleaning cylinder 730, and then the second rotating plate 810 can drive the second piston rod 811 to squeeze the second air hole 821, so that the second air bag 822 is deployed.

[0027] Furthermore, the fixed plate 710 and the first rotating plate 720 are both provided with through holes, and the output end of the second cylinder 620 passes through the through holes and enters the central hole 732 of the first cleaning cylinder 730 , and corresponds to the second rotating plate 810 up and down.

[0028] Furthermore, a first magnetic ring 740 is fixed to the outer peripheral surface of the first cleaning cylinder 730, and a first magnetic chain 750 is provided at the connection between the first airbag 760 and the first cleaning cylinder 730. The first magnetic chain 750 includes a first elastic rope 751, and a plurality of first magnetic balls are evenly distributed on the first elastic rope 751. The first magnetic ring 740 corresponds to the first magnetic ball up and down and repel each other.

[0029] Furthermore, a second magnetic ring (not shown in the figure, the same as the first magnetic ring 740) is fixed to the outer peripheral surface of the second cleaning cylinder 820, and a second magnetic chain (not shown in the figure, the same as the first magnetic chain 750) is provided at the connection between the second airbag 822 and the second cleaning cylinder 820. The second magnetic chain includes a second elastic rope (not shown in the figure, the same as the first elastic rope 751), and a plurality of second magnetic balls (not shown in the figure, the same as the first magnetic balls) are evenly distributed on the second elastic rope. The second magnetic ring corresponds to the second magnetic ball up and down and repel each other.

[0030] Furthermore, the first cylinder 610 and the second cylinder 620 are both fixed on the fixing frame 300 .

[0031] Furthermore, the inner wall of the central hole 732 is provided with a spline groove, and the outer peripheral surface of the second cleaning cylinder 820 is provided with a spline, and the spline and the spline groove are anti-rotationally matched, so that the second cleaning cylinder 820 rotates synchronously with the first cleaning cylinder 730.

[0032] Further, a return spring (not shown in the figure) is provided between the spline and the bottom of the spline groove, and in the initial state, the return spring can shrink the second cleaning cylinder 820 into the first cleaning cylinder 730. In this way, in the initial state, the second airbag 822 will shrink into the first cleaning cylinder 730.

[0033] Furthermore, the fixing frame 300 is installed on the base 100 through telescopic legs 301, and a driving motor 400 is provided on the fixing frame 300, and the driving motor 400 is used to drive the grinding cylinder to rotate.

[0034] In combination with the above embodiments, the use principle and working process of the embodiments of the present invention are as follows: First, the mold 200 is clamped and fixed on the base 100, and then the telescopic legs 301 are controlled to adjust the height of the fixing frame 300 so that the grinding head 501 of the grinding assembly 500 can enter the hole of the mold 200, and then the driving motor 400 is controlled to drive the grinding cylinder to rotate so that the grinding head 501 on the grinding cylinder grinds the hole wall of the mold 200, and the first cleaning cylinder 730 and the second cleaning cylinder 820 rotate synchronously with the grinding cylinder, and then the first cylinder 610 is controlled to extend to drive the first fixed plate 710 to move downward, and then the first rotating plate 720 is pushed to drive the first piston rod 721 to slide downward along the first air hole 731, so that the first airbag 760 is gradually inflated and expanded, and the expansion of the first airbag 760 drives the first magnetic chain 750 to expand, and at the same time, the first magnetic chain 750 overcomes the magnetism and approaches the first magnetic ring 740, such as Fig.10 and 11 As shown, the first airbag 760 is composed of Fig.10 The first state gradually expands and becomes Fig.11 The second state, during this process, Fig.12 and Fig.13 As shown in FIG. 1 , the height of the first vertical section 761 gradually decreases, while the height of the second vertical section 762 gradually increases, so that the first airbag 760 is in closer contact with the hole wall of the mold 200. As the grinding progresses, the debris generated by the grinding will fall onto the first airbag 760. Then the first cylinder 610 is controlled to contract, thereby driving the first piston rod 721 to slide upward along the first air hole 731, so that the first airbag 760 contracts a part. Under the repulsive effect of the first magnetic ring 740 and the first magnetic chain 750, the first airbag 760 is Fig.11 The second state becomes Fig.10 The first state of the first airbag 760 is achieved, and the debris on the surface of the first airbag 760 is close to the axis of the grinding cylinder, reducing the accumulation of debris between the first airbag 760 and the hole wall of the mold 200. In this way, when the first airbag 760 rotates with the grinding cylinder, the wear of the first airbag 760 can be reduced.

[0035] Then the second cylinder 620 is controlled to extend, driving the second rotating plate 810 to move downward. Since the second air bag 822 is contracted in the first cleaning cylinder 730, there is a certain air pressure in the second air hole 821, which makes it difficult for the second piston rod 811 to slide in the second air hole 821. The downward movement of the second rotating plate 810 will first drive the second cleaning cylinder 820 to overcome the elastic force of the return spring, so that the second cleaning cylinder 820 slides along the center hole 732 of the first cleaning cylinder 730 until the spline of the second cleaning cylinder 820 slides to the bottom of the spline groove. At this time, the second air bag 822 extends from the bottom of the first cleaning cylinder 730, and then the downward movement of the second rotating plate 810 can drive the second piston rod 811 to squeeze the second air hole 821, thereby realizing the deployment of the second air bag 822. The opening process of the second airbag 822 is the same as that of the first airbag 760, which can make the second airbag 822 contact more closely with the hole wall of the mold 200, and the debris generated by grinding will fall on the second airbag 822. Then the second cylinder 620 is controlled to contract, thereby driving the second airbag 822 to contract, and then the debris on the surface of the second airbag 822 will be close to the axis of the grinding cylinder, reducing the accumulation of debris between the second airbag 822 and the hole wall of the mold 200, and reducing the wear of the second airbag 822. After the grinding is completed, the fixed frame 300 is controlled to move upward to drive the grinding piece to extend from the hole of the mold 200. Since the second airbag 822 is located below the first airbag 760, and the first airbag 760 is located below the grinding piece, the second airbag 822 still stays in the hole of the mold 200 when the grinding piece is extended, which can prevent the debris from entering the hole of the mold 200 again. When the second airbag 822 extends out from the hole of the mold 200, the first cylinder 610 and the second cylinder 620 are controlled to shorten, so that the first airbag 760 and the second airbag 822 are both contracted to achieve the cleaning of debris. After the second airbag 822 is completely contracted, the return spring will drive the second cleaning cylinder 820 to enter the first cleaning cylinder 730, so that the second airbag 822 is completely contracted into the first cleaning cylinder 730.

[0036] Due to the arrangement of the first airbag 760 and the second airbag 822, when the grinding assembly 500 is removed from the hole of the mold 200, the first airbag 760 and the second airbag 822 can take out most of the debris, avoiding most of the debris between the first airbag 760 and the hole wall of the mold 200, and between the second airbag 822 and the hole wall of the mold 200 from falling into the hole of the mold 200, thereby improving the debris cleaning effect; at the same time, reducing the friction between the first airbag 760, the second airbag 822 and the hole wall of the mold 200, thereby extending the service life of the first airbag 760 and the second airbag 822.

[0037] The first airbag 760 and the second airbag 822 can be used alternately or synchronously, and have a longer service life compared to setting only one airbag. When the first airbag 760 transports the debris toward the axis of the grinding cylinder, the remaining accumulated debris will partially fall onto the second airbag 822, and the second airbag 822 can continue to transport the debris toward the axis of the grinding cylinder, so that the accumulated debris can be shared by the first airbag 760 and the second airbag 822, and will not be accumulated only between a certain airbag and the hole wall of the mold 200, thereby improving the debris cleaning efficiency.

[0038] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0039] The above-described embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A surface grinding device for mold production, characterized in that: The invention comprises a base, wherein the base is used for clamping and fixing the mold, the base is provided with a fixed frame which can move up and down, the fixed frame is rotatably provided with a grinding assembly, the grinding assembly comprises a grinding cylinder, the outer peripheral surface of the grinding cylinder is provided with a grinding piece, the grinding piece is used for grinding the hole wall of the mold, the interior of the grinding cylinder is provided with a first cleaning assembly, the first cleaning assembly comprises a first cleaning cylinder, the bottom of the first cleaning cylinder is connected with a first air bag, the first air bag is located below the grinding cylinder, so that the debris generated by grinding can fall onto the first air bag, the first cleaning cylinder is correspondingly provided with a first driving mechanism, the first driving mechanism is used to expand or contract the first air bag; the interior of the first cleaning cylinder is coaxially provided with a second cleaning assembly, the second cleaning assembly comprises a second cleaning cylinder, the bottom of the second cleaning cylinder is connected with a second air bag, the second cleaning cylinder is correspondingly provided with a second driving mechanism, the second driving mechanism drives the second cleaning cylinder to extend from the bottom of the first cleaning cylinder, so that the second air bag is located below the first air bag and expands or contracts the second air bag.

2. The surface grinding equipment for mold production according to claim 1, characterized in that: A center hole and a plurality of first air holes distributed circumferentially around the center hole are provided inside the first cleaning cylinder, and a second cleaning cylinder is anti-rotatingly assembled in the center hole. A first rotating plate is provided above the first cleaning cylinder, and a plurality of first piston rods are provided at the bottom of the first rotating plate, and the first piston rods correspond one-to-one to the first air holes. The first driving mechanism includes a first cylinder, and a fixed plate is connected to the output end of the first cylinder, and the fixed plate corresponds to the first rotating plate up and down.

3. The surface grinding equipment for mold production according to claim 2, characterized in that: A second air hole is provided inside the second cleaning cylinder, a second rotating plate is provided above the second cleaning cylinder, a second piston rod is provided at the bottom of the second rotating plate, the second piston rod corresponds to the second air hole, the second driving mechanism includes a second cylinder, and the output end of the second cylinder is connected to the second rotating plate.

4. The surface grinding equipment for mold production according to claim 3, characterized in that: The fixed plate and the first rotating plate are both provided with through holes, and the output end of the second cylinder passes through the through hole into the central hole of the first cleaning cylinder and corresponds to the second rotating plate up and down.

5. The surface grinding equipment for mold production according to claim 1, characterized in that: A first magnetic ring is fixed to the outer circumferential surface of the first cleaning cylinder, a first magnetic chain is provided at the connection between the first airbag and the first cleaning cylinder, the first magnetic chain includes a first elastic rope, a plurality of first magnetic balls are evenly distributed on the first elastic rope, the first magnetic ring and the first magnetic balls correspond to each other up and down and repel each other.

6. The surface grinding equipment for mold production according to claim 1, characterized in that: A second magnetic ring is fixed to the outer circumferential surface of the second cleaning cylinder, a second magnetic chain is provided at the connection between the second airbag and the second cleaning cylinder, the second magnetic chain includes a second elastic rope, a plurality of second magnetic balls are evenly distributed on the second elastic rope, and the second magnetic ring corresponds to the second magnetic balls up and down and repel each other.

7. The surface grinding equipment for mold production according to claim 3, characterized in that: The first cylinder and the second cylinder are both fixed on a fixing frame.

8. The surface grinding equipment for mold production according to claim 2, characterized in that: The inner wall of the center hole is provided with a spline groove, and the outer peripheral surface of the second cleaning tube is provided with a spline, and the spline is anti-rotationally matched with the spline groove.

9. The surface grinding equipment for mold production according to claim 8, characterized in that: A return spring is arranged between the spline and the bottom of the spline groove. In the initial state, the return spring can shrink the second cleaning cylinder into the first cleaning cylinder.

10. The surface grinding equipment for mold production according to claim 1, characterized in that: The fixing frame is installed on the base through telescopic legs. A driving motor is arranged on the fixing frame, and the driving motor is used to drive the grinding cylinder to rotate.

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