Rapid detection device for flatness of matching surface of graphite die

By designing a graphite mold mating surface flatness rapid detection device with variable bottom support module and liftable mold fixing module, the problem of data re-adjustment of existing equipment when replacing molds is solved, and fast and accurate mold detection is achieved, reducing operational complexity and cost.

CN223271884UActive Publication Date: 2025-08-26HUIXIAN WEIYE GRAPHITE PRODUCTS CO LTD
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Patent Information

Application Number
CN202422793366.0
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-11-15
Publication Date
2025-08-26
Estimated Expiration
2034-11-15

AI Technical Summary

Technical Problem

The existing graphite mold detection equipment needs to readjust the data after replacing different molds. The operation process is complex and costly, making it difficult to quickly and accurately detect the flatness of the fitting surface of molds of different sizes and shapes.

Method used

A rapid detection device for flatness of graphite mold mating surface is designed to position and detect the horizontality of the mold through manual means, including a variable bottom support module, a liftable mold fixing module and a detection mechanism to adapt to molds of different sizes and shapes.

Benefits of technology

It realizes simple operation, high detection accuracy, simple structure and low cost, and can adapt to mold mating surface inspection of different sizes and shapes.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model relates to the field of graphite mold production, in particular to a graphite mold matching surface flatness rapid detection device which comprises a base, length-variable bottom supporting modules are arranged on the two sides of the top end of the base, a stand column is vertically and fixedly arranged on the side portion of the base, and a liftable mold fixing module is arranged on the stand column. A detection mechanism capable of detecting the flatness of the top of the mold is arranged on the stand column above the base in a liftable manner; according to the rapid detection device for the flatness of the matching surface of the graphite mold, the levelness of the matching surface of the mold can be positioned and detected manually, the operation is simple and rapid, the detection accuracy is higher, the structure is simple, the manufacturing cost is low, and the rapid detection device can adapt to molds with different sizes and different shapes.
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Description

Technical Field

[0001] The utility model relates to the field of graphite mold production, in particular to a device for quickly detecting the flatness of a matching surface of a graphite mold. Background Art

[0002] After production, graphite molds require testing for mating surface flatness. This flatness directly impacts the mold's sealing and consistency during the molding process, and thus the dimensional accuracy and appearance quality of the final product. When producing large quantities, rapid testing of mold mating surfaces is crucial. This helps identify mold problems promptly, preventing the generation of large quantities of scrap resulting from long-term operation of defective molds, thereby reducing production costs and improving efficiency. However, most existing testing equipment can only test the same mold. Switching to a different mold requires re-adjusting the data, resulting in a complex operational process and high equipment purchase and maintenance costs. Therefore, overcoming these technical problems and drawbacks has become a key issue that needs to be addressed. Utility Model Content

[0003] The purpose of the invention of the utility model is to overcome the defects described in the background technology, thereby realizing a rapid detection device for the flatness of the mating surface of a graphite mold. The device can manually locate and detect the horizontality of the mating surface of the mold. The operation is simple and fast, the detection accuracy is high, and the structure is simple and the manufacturing cost is low. It can also adapt to molds of different sizes and shapes.

[0004] To achieve the aforementioned objectives, the present invention provides a device for rapidly detecting the flatness of a graphite mold's mating surface, comprising a base with variable-length bottom support modules mounted on either side of the base's top. Vertically fixed columns are mounted on the sides of the base, each containing a retractable mold-holding module. A retractable detection mechanism capable of detecting the top flatness of the mold is mounted on the column above the base.

[0005] In the aforementioned graphite mold mating surface flatness rapid testing device, the bottom support module includes two sets of support plates located on either side of the top of the base. The two support plates are arranged parallel to each other and each is connected to the top of the base via a first spring fixed at each end. This provides soft support for the mold, facilitating subsequent leveling of the mold mating surface.

[0006] A straight plate is mounted on the end of the support plate, sliding along its length. A straight rod is fixed horizontally to the support plate and inserted into the straight plate. A second spring is mounted inside the straight plate and sleeved on the straight rod. The supported mold size can be changed to accommodate molds of different lengths or widths, facilitating subsequent testing.

[0007] The ends of the support plate and the straight plate are fixedly provided with baffles, and the opposite ends of the two baffles are provided with gaskets, which can clamp the mold and thus simply limit the position of the mold.

[0008] In the above-mentioned graphite mold matching surface flatness rapid detection device, the column is fixedly arranged at the middle position of one side of the base, and the column is located between the two support plates.

[0009] In the above-mentioned graphite mold matching surface flatness rapid detection device, a T-shaped groove is provided inside the column, and a liftable T-shaped rod is provided in the T-shaped groove.

[0010] A first screw is vertically rotated inside the T-shaped slot, the top end of the first screw passes through the top end of the T-shaped rod and the column, and a first hand wheel is provided on the top end of the screw.

[0011] The first lead screw is threadedly connected to the T-shaped rod, so that the height of the T-shaped rod can be adjusted to adapt to mold inspections at different heights.

[0012] In the aforementioned graphite mold mating surface flatness rapid detection device, guide rods are fixedly mounted on both sides of the column, each of which extends vertically through the two arms of the T-shaped rod. This guides the movement of the T-shaped rod, preventing it from tilting and causing errors in detection.

[0013] In the above-mentioned graphite mold matching surface flatness rapid detection device, the mold fixing modules are provided in two groups and are respectively located at two opposite ends of the T-shaped rod.

[0014] The mold fixing module includes a positioning unit comprising a first slot horizontally defined on the arm of a T-shaped rod. A slider is slidably mounted on the T-shaped rod and slides within the first slot. A first adjustment bolt is vertically mounted on the top of the slider, abutting the slot. The slider's position can be adjusted to accommodate molds of varying lengths.

[0015] A second slot is horizontally defined on the side of the slider facing the base. A horizontal plate is mounted on the slider above the base, allowing for horizontal sliding within the second slot. The top of the plate is provided with reinforcing ribs, enabling horizontal positioning of the mold's mating surface to ensure its levelness during testing.

[0016] In the aforementioned graphite mold mating surface flatness rapid testing device, the mold fixing module further includes a fixing unit comprising an L-shaped plate fixed horizontally to the bottom of the slider below the horizontal plate. The L-shaped plate is located outside the horizontal plate and its length is aligned with the horizontal plate. At least two second adjustment bolts are horizontally disposed on the outside of the L-shaped plate and extend through the L-shaped plate. This can secure the mold after it is positioned horizontally, ensuring that the mold mating surface remains horizontal during testing.

[0017] The bent portion of the L-shaped plate is opposite to the direction of the horizontal plate.

[0018] In the above-mentioned graphite mold mating surface flatness rapid detection device, the detection mechanism includes a fixing rod with a single end of a T-shaped rod horizontally fixed, and the fixing rod is located above the base.

[0019] The fixed rod has a third slot extending through its end along its length. An extension rod is mounted on the fixed rod and can slide within the third slot. A paddle is vertically fixed to the top of the extension rod, extending from the top of the fixed rod. The extension rod's head extends out of the third slot. This allows for the adaptation of molds of varying sizes and facilitates subsequent testing.

[0020] A movable rod is positioned horizontally and parallel to the fixed rod below. A guide rod is vertically fixed to the top of the movable rod's tail. The top of the guide rod passes through the extension rod and the third chute, extending out of the top of the fixed rod. A second lead screw is vertically rotated at the top of the movable rod's head. The top of the second lead screw passes through the head of the extension rod and is threadedly connected to the extension rod. A second handwheel is fixed to the top of the second lead screw. The position of the movable rod can be adjusted to accommodate molds of different heights.

[0021] An H-shaped rod is installed in the middle of the movable rod for horizontal sliding. Color wiping plates are fixed at the bottom of both ends of the H-shaped rod. The bottoms of the color wiping plates are located in the same plane, and a grip is fixed at the top of the H-shaped rod. The color wiping plates can be used to detect the horizontality of the mold mating surface.

[0022] Compared with the prior art, the graphite mold mating surface flatness rapid detection device of the present invention has at least the following beneficial effects:

[0023] 1. The utility model of the graphite mold mating surface flatness rapid detection device can manually locate and detect the horizontality of the mold mating surface. The operation is simple and fast, the detection accuracy is high, and the structure is simple and the manufacturing cost is low. It can also adapt to molds of different sizes and shapes.

[0024] 2. The utility model's graphite mold mating surface flatness rapid detection device is equipped with a bottom support module with variable length and a liftable mold fixing module. It can locate and fix the horizontality of the mating surface of molds of different heights, shapes and sizes, facilitating subsequent levelness detection.

[0025] 3. The utility model is a rapid detection device for the flatness of the matching surface of a graphite mold. It is provided with a detection mechanism that can detect the flatness of the top of the mold. It can adapt to molds of different heights and sizes. At the same time, it can detect the horizontal surface through the rubbing plate. It is quick to operate, highly accurate and practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the overall structure of the graphite mold matching surface flatness rapid detection device of the utility model;

[0027] Figure 2 This is a schematic diagram of the exploded structure of the bottom support module of the graphite mold matching surface flatness rapid detection device of the utility model;

[0028] Figure 3 The utility model is a schematic diagram of the exploded structure of a mold fixing module of a device for quickly detecting the flatness of a matching surface of a graphite mold.

[0029] In the figure: 1. Base;

[0030] 2. Bottom support module; 21. Support plate; 22. First spring; 23. Straight plate; 24. Straight rod; 25. Second spring; 26. Baffle; 27. Gasket;

[0031] 3. Pillar;

[0032] 4. Mold fixing module; 41. Positioning unit; 411. First chute; 412. Slider; 413. First adjusting bolt; 414. Second chute; 415. Horizontal plate; 416. Reinforcement rib;

[0033] 42. Fixing unit; 421. L-shaped plate; 422. Second adjusting bolt;

[0034] 5. Detection mechanism; 51. Fixed rod; 52. Third slide; 53. Extension rod; 54. Pick; 55. Moving rod; 56. Guide rod; 57. Second lead screw; 58. Second hand wheel; 59. H-shaped rod; 60. Color eraser; 61. Grip;

[0035] 6. T-slot; 7. T-rod; 8. First lead screw; 9. First handwheel; 10. Guide rod. DETAILED DESCRIPTION

[0036] The following is a more detailed description of the graphite mold matching surface flatness rapid detection device of the present invention with reference to the accompanying drawings and through specific implementation methods.

[0037] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0038] See also Figure 1-Figure 3 The graphite mold mating surface flatness rapid detection device of this embodiment can manually locate and detect the horizontality of the mold's mating surface. It is simple and quick to operate, with high detection accuracy. It also has a simple structure and low manufacturing cost, and can adapt to molds of different sizes and shapes. In this embodiment, it mainly includes a base 1, and bottom support modules 2 with variable lengths are provided on both sides of the top of the base 1. The bottom support module 2 includes two groups of support plates 21 respectively located on both sides of the top of the base 1, and the two support plates 21 are arranged parallel to each other and each of the support plates 21 is connected to the top of the base 1 through a first spring 22 fixed at both ends of its bottom. Thereby, soft support for the mold is achieved, which facilitates the subsequent adjustment of the horizontality of the mold mating surface.

[0039] A straight plate 23 is slidably mounted along the length of the support plate 21. A straight rod 24 is fixed horizontally to the support plate 21 and inserted into the straight plate 23. A second spring 25 is mounted within the straight plate 23, which sleeves onto the straight rod 24. This allows for varying mold sizes to accommodate molds of varying lengths and widths, facilitating subsequent testing. Baffles 26 are fixed to the ends of both the support plate 21 and the straight plate 23, with gaskets 27 positioned at opposite ends of each baffle 26. During use, the straight plate 23 is pulled, causing it to extend outward from the support plate 21, overcoming the resistance of the second spring 25. The mold is then placed on the support plate 21 and the straight plate 23. The straight plate 23 is released, returning to its original position under the action of the second spring 25, thereby clamping the mold and providing a simple limit on its position. The first spring 22 provides soft support for the mold.

[0040] To accommodate molds of different heights. Figure 1 and Figure 3In this embodiment, a column 3 is vertically fixed on the side of the base 1. The column 3 is fixed in the middle position of one side of the base 1, and the column 3 is located between two support plates 21. A T-shaped slot 6 is provided inside the column 3, and a liftable T-shaped rod 7 is provided in the T-shaped slot 6. A first screw 8 is vertically rotated inside the T-shaped slot 6. The top of the first screw 8 passes through the T-shaped rod 7 and the top of the column 3, and a first handwheel 9 is provided at the top of the screw. The first screw 8 is threadedly connected to the T-shaped rod 7. The height adjustment of the T-shaped rod 7 is achieved to adapt to mold inspections of different heights. Guide rods 10 are fixed on both sides of the column 3, and each of the guide rods 10 passes through the two arms of the T-shaped rod 7 in the up and down directions.

[0041] Turning the first hand wheel 9 rotates the first lead screw 8, thereby raising and lowering the T-shaped rod 7 in the T-slot, thereby adjusting the height of the T-shaped rod 7 to accommodate molds at different heights. During this process, the guide rod 10 guides the movement of the T-shaped rod 7 to prevent it from tilting and causing errors in the inspection.

[0042] In order to realize the horizontal positioning and fixation of the mold matching surface. In this embodiment, see Figure 1 and Figure 3 , a mold fixing module 4 that can be raised and lowered is provided on the column 3. The mold fixing module 4 is provided in two groups and is respectively located at the opposite ends of the T-shaped rod 7. The mold fixing module 4 includes a positioning unit 41, and the positioning unit 41 includes a first slide groove 411 horizontally provided on the arm of the T-shaped rod 7, and a slider 412 sliding in the first slide groove 411 is slidably provided on the T-shaped rod 7, and a first adjustment bolt 413 that can abut against the slide groove is vertically provided on the top of the slider 412. The position of the slider 412 can be adjusted to adapt to molds of different lengths. A second slide groove 414 is horizontally provided on the side of the slider 412 facing the base 1, and a horizontal plate 415 that can slide horizontally in the second slide groove 414 is provided on the slider 412 above the base 1, and a reinforcing rib 416 is provided on the top of the horizontal plate 415. The reinforcing rib 416 keeps the horizontal plate 415 in a horizontal state.

[0043] Slider 412 is moved within first slot 411 to accommodate molds of varying lengths, and the position is fixed by first adjustment bolt 413. The height of T-bar 7 can then be adjusted to bring the bottom of horizontal plate 415 into contact with the mating surface of the mold. This, in conjunction with first spring 22, horizontally positions the mating surface of the mold, ensuring its levelness during testing.

[0044] The mold fixing module 4 also includes a fixing unit 42, which includes an L-shaped plate 421 fixed horizontally at the bottom of the slider 412 below the horizontal plate 415. The L-shaped plate 421 is located on the outside of the horizontal plate 415 and its length direction is consistent with the horizontal plate 415. At least two second adjustment bolts 422 that pass through the L-shaped plate 421 are horizontally arranged on the outside of the L-shaped plate 421. After the horizontal positioning of the mold mating surface, the position of the mold is fixed by the second adjustment bolts 422 to ensure that the mold mating surface is horizontal during testing. The horizontal plate 415 is then moved to the outside of the L-shaped plate 421 through the second slide 414 to prevent it from affecting the subsequent levelness test. The bent portion of the L-shaped plate 421 is opposite to the direction of the horizontal plate 415.

[0045] In order to realize the levelness detection of the mold matching surface. Figure 1 and Figure 3 The column 3 above the base 1 is provided with a detection mechanism 5 that can be raised and lowered to detect the top flatness of the mold. The detection mechanism 5 includes a fixed rod 51 fixed horizontally at one end of a T-shaped rod 7, and the fixed rod 51 is located above the base 1. The fixed rod 51 is provided with a third slide groove 52 running through its end along its length. The fixed rod 51 is provided with an extension rod 53 that can slide within the third slide groove 52. The top end of the extension rod 53 is vertically fixed with a paddle 54 that extends out of the top of the fixed rod 51, and the head of the extension rod 53 extends out of the third slide groove 52. It can adapt to molds of different sizes and facilitate subsequent inspections.

[0046] A movable rod 55 is arranged horizontally and parallel to the bottom of the fixed rod 51. A guide rod 56 is fixed vertically to the top of the tail of the movable rod 55. The top of the guide rod 56 passes through the extension rod 53 and the third slide groove 52 and extends out of the top of the fixed rod 51. A second screw 57 is arranged vertically and rotatably at the top of the head of the movable rod 55. The top of the second screw 57 passes through the head of the extension rod 53 and is threadedly connected to the extension rod 53. A second handwheel 58 is fixed to the top of the second screw 57. The position of the movable rod 55 can be adjusted to accommodate molds of different heights. An H-shaped rod 59 is arranged horizontally and slidably in the middle of the movable rod 55. Color erasers 60 are fixed to the bottom of both ends of the H-shaped rod 59. The color erasers 60 are hard boards that can be painted. They are mature existing technologies and will not be described in detail here. The bottoms of the color erasers 60 are located in the same plane, and a gripping rod 61 is fixed to the top of the H-shaped rod 59. The horizontality of the mold matching surface can be detected by the color wiping board 60.

[0047] After the mold is positioned, the second handwheel 58 is rotated to move the movable plate downward, bringing the wiping plate 60 into contact with the top of the mold. During this process, the guide rod 56 provides guidance to prevent the movable plate from tilting and affecting the inspection effect. The H-shaped plate is then moved using the grip 61, and the wiping plate 60 wipes the top of the mold. Flatness is checked by observing any untouched areas or areas with inconspicuous marks. During this process, the H-shaped plate is moved using the paddle 54 to accommodate molds of varying sizes.

[0048] The method for using the device for quickly testing the flatness of the mating surface of a graphite mold of the present invention is as follows: First, pull the straight plate 23 outward on the support plate 21, and then place the mold on the support plate 21 and the straight plate 23. Release the straight plate 23 and return it to its original position, thereby clamping the mold and simply limiting its position. Turn the first handwheel 9 to raise and lower the T-shaped rod 7 within the T-shaped slot, adjusting the height of the T-shaped rod 7 to accommodate testing molds of different heights. During this process, the guide rod 10 can guide the movement of the T-shaped rod 7 to prevent skewness and the resulting error in the test.

[0049] Slider 412 is moved within first slot 411 and fixed in position using first adjustment bolt 413. The bottom of horizontal plate 415 is brought into contact with the mating surface of the mold by adjusting the height of T-bar 7. This, in conjunction with first spring 22, positions the mating surface horizontally, ensuring its levelness during testing. Second adjustment bolt 422 is then used to secure the mold, ensuring its levelness during testing. Horizontal plate 415 is then moved outside L-shaped plate 421 via second slot 414 to prevent it from interfering with subsequent levelness testing. After the mold is fixed in position, second handwheel 58 is rotated to bring the wiping plate 60 into contact with the top of the mold. Guide rod 56 provides guidance during this process, preventing the movable plate from tilting and impacting the test. The H-shaped plate is then moved using grip 61, and the wiping plate 60 wipes the top of the mold. Flatness testing is performed by observing any untouched areas or areas with inconspicuous marks. The H-shaped plate is moved using paddle 54 to accommodate molds of varying sizes.

[0050] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning understood by persons of ordinary skill in the field to which the present invention belongs. The use of "one" or "an" and other similar words in the specification and claims of this application does not necessarily indicate a quantitative limitation. "Include" or "comprising" and other similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and other similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

[0051] The exemplary implementation of the present invention is described in detail above with reference to the preferred embodiments. However, it can be understood by those skilled in the art that, without departing from the concept of the present invention, various variations and modifications can be made to the above-mentioned specific embodiments, and various combinations of the various technical features and structures proposed in the present invention can be made without exceeding the scope of protection of the present invention.

Claims

1. A device for quickly detecting the flatness of a graphite mold mating surface, characterized in that: The invention comprises a base (1), bottom support modules (2) with variable lengths are arranged on both sides of the top of the base (1), columns (3) are vertically fixedly arranged on the sides of the base (1), a mold fixing module (4) that can be lifted and lowered is arranged on the columns (3), and a detection mechanism (5) that can detect the top flatness of the mold is arranged on the columns (3) above the base (1).

2. The graphite mold mating surface flatness rapid detection device according to claim 1, characterized in that: The bottom support module (2) comprises two groups of support plates (21) respectively located on both sides of the top of the base (1), the two support plates (21) are arranged parallel to each other, and each support plate (21) is connected to the top of the base (1) via a first spring (22) fixedly arranged at both ends of the bottom thereof; A straight plate (23) is slidably provided at the end of the support plate (21) along its length direction, a straight rod (24) is fixedly provided horizontally on the support plate (21) and inserted into the straight plate (23), and a second spring (25) is provided inside the straight plate (23) and sleeved on the straight rod (24); Baffles (26) are fixedly provided at the ends of the support plate (21) and the straight plate (23), and gaskets (27) are provided at the opposite ends of the two baffles (26).

3. The graphite mold mating surface flatness rapid detection device according to claim 2, characterized in that: The column (3) is fixedly arranged at a middle position on one side of the base (1), and the column (3) is located between two support plates (21).

4. The graphite mold mating surface flatness rapid detection device according to claim 1, characterized in that: A T-shaped groove (6) is provided inside the column (3), and a liftable T-shaped rod (7) is provided inside the T-shaped groove (6); a first screw (8) is provided inside the T-shaped groove (6) for vertical rotation, the top end of the first screw (8) passes through the T-shaped rod (7) and the top end of the column (3), and a first hand wheel (9) is provided at the top end of the screw; The first lead screw (8) is threadedly connected to the T-shaped rod (7).

5. The graphite mold mating surface flatness rapid detection device according to claim 4, characterized in that: Guide rods (10) are fixedly provided on both sides of the column (3), and each guide rod (10) passes through the two arms of the T-shaped rod (7) in the up-down direction.

6. The graphite mold mating surface flatness rapid detection device according to claim 4, characterized in that: The mold fixing modules (4) are provided in two groups and are respectively located at two opposite ends of the T-shaped rod (7); The mold fixing module (4) includes a positioning unit (41), the positioning unit (41) includes a first sliding groove (411) horizontally provided on the arm of the T-shaped rod (7), a slider (412) sliding in the first sliding groove (411) is slidably provided on the T-shaped rod (7), and a first adjusting bolt (413) capable of abutting against the sliding groove is vertically provided at the top end of the slider (412); A second sliding groove (414) is horizontally provided on one side of the slider (412) facing the base (1); a horizontal plate (415) capable of sliding horizontally in the second sliding groove (414) is provided on the slider (412) above the base (1); and a reinforcing rib (416) is provided at the top end of the horizontal plate (415).

7. The graphite mold mating surface flatness rapid detection device according to claim 6, characterized in that: The mold fixing module (4) further includes a fixing unit (42), the fixing unit (42) including an L-shaped plate (421) fixedly arranged horizontally at the bottom of the slider (412) below the horizontal plate (415), the L-shaped plate (421) being located outside the horizontal plate (415) and having a length direction consistent with that of the horizontal plate (415), and at least two second adjusting bolts (422) penetrating the L-shaped plate (421) being horizontally arranged outside the L-shaped plate (421); The bent portion of the L-shaped plate (421) is opposite to the direction of the horizontal plate (415).

8. The graphite mold mating surface flatness rapid detection device according to claim 4, characterized in that: The detection mechanism (5) comprises a fixing rod (51) fixedly arranged horizontally at one end of a T-shaped rod (7), and the fixing rod (51) is located above the base (1); The fixing rod (51) is provided with a third sliding groove (52) running through the end thereof along its length direction, and an extension rod (53) is provided on the fixing rod (51) and can slide inside the third sliding groove (52), and a paddle (54) extending from the top of the fixing rod (51) is vertically fixed at the top end of the tail of the extension rod (53), and the head of the extension rod (53) extends out of the third sliding groove (52); A movable rod (55) is horizontally and parallelly arranged below the fixed rod (51), a guide rod (56) is vertically fixedly arranged at the top end of the tail of the movable rod (55), the top of the guide rod (56) passes through the extension rod (53) and the third slide groove (52) and extends out of the top end of the fixed rod (51), a second screw (57) is vertically rotated at the top end of the head of the movable rod (55), the top end of the second screw (57) passes through the head of the extension rod (53) and the second screw (57) is threadedly connected to the extension rod (53), and a second hand wheel (58) is fixedly arranged at the top end of the second screw (57); An H-shaped rod (59) is horizontally slidably provided in the middle of the movable rod (55), and color wiping plates (60) are fixedly provided at the bottoms of both ends of the H-shaped rod (59). The bottoms of the color wiping plates (60) are located in the same plane, and a gripping rod (61) is fixedly provided at the top of the H-shaped rod (59).