Polishing device for automobile die machining

Abstract

The invention relates to the technical field of automobile die machining, and discloses a polishing device for automobile die machining, which comprises a polishing table, a polishing machine is fixedly mounted on one side of the top of the polishing table, the polishing device further comprises a collecting box, the collecting box is fixedly mounted on the polishing table, and the top of the collecting box penetrates through the polishing table and extends to the outside; and a bag type filter and a through pipe I are arranged on one side of the collecting box. The top plate is a downwards-sunken cambered surface, and polishing chippings can be gathered in the direction of the collecting box in cooperation with airflow guiding of the fan blades; the bag type filter forms negative pressure circulation through the first through pipe and the second through pipe, dust is rapidly adsorbed through the air holes and the limiting grooves, and drifting pollution is avoided. A screw in the collecting chamber drives a scraper to slide, chips can be pushed to the position of a through pipe, the chips are guided out in a centralized mode in cooperation with the inclined inner bottom wall, meanwhile, a cleaning brush synchronously cleans the residual chips on the surface of the top plate, whole-process dust collection of centralized gathering, rapid adsorption and thorough cleaning is achieved, and the working environment is greatly improved.

Description

Technical Field

[0001] This invention relates to the field of automotive mold processing technology, specifically to a polishing device for automotive mold processing. Background Technology

[0002] Automotive mold processing is a core link in the automotive manufacturing industry chain, encompassing the precision machining processes of various types of molds, including stamping dies, injection molds, and die-casting molds. This process uses high-performance materials such as mold steel and aluminum alloys as a base, integrating multiple processes such as CNC milling, EDM, precision grinding, and polishing. It relies on CAD / CAM integrated design software to achieve digital modeling of the mold structure and machining path planning. During processing, strict control must be maintained over the dimensional accuracy, surface roughness, and geometric tolerances of the mold cavity to match the forming requirements of automotive body panels, interior parts, and powertrain components. Currently, automotive mold processing technology is developing towards high precision, high efficiency, and integration. Its processing quality directly determines the forming effect and assembly consistency of automotive parts, and is a key support for ensuring the stability of overall vehicle production.

[0003] Polishing is an essential process in automotive mold manufacturing. However, traditional polishing equipment often generates a lot of dust during the process, leaving workers constantly exposed to dust. Inhaling this dust can seriously affect their health. Therefore, we propose a polishing device for automotive mold manufacturing. Summary of the Invention

[0004] The purpose of this invention is to provide a polishing apparatus for automotive mold processing to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a polishing device for automotive mold processing, comprising a polishing table, wherein a polishing machine is fixedly mounted on one side of the top of the polishing table, and further comprising:

[0006] A collection box is fixedly installed on a polishing table. The top of the collection box passes through the polishing table and extends to the outside. A bag filter and a through pipe are provided on one side of the collection box. Two scrapers are provided inside the collection box. A connecting plate is fixedly installed on the top of the scraper. A cleaning brush is fixedly installed on the top of the connecting plate. A lower clamping rod is fixedly installed on the top of the cleaning brush. An upper clamping rod is provided above the lower clamping rod. Several clamping heads are provided on one side of the upper clamping rod.

[0007] The top plate has a limited groove and several ventilation holes. Side frames are fixedly installed on both sides of the collection box, and a fan blade is rotatably installed on one side of the side frame.

[0008] A power unit, located on one side of the side frame, is used to drive the fan blades to rotate.

[0009] In this technical solution, the operator places the car mold to be polished on the top plate. Then, the operator turns on motor one, which drives the screw to rotate. Under the action of the screw, the two scrapers move closer to each other. The scrapers drive the connecting plate, lower clamping rod, and upper clamping rod to move synchronously towards the car mold until the clamping head clamps the car mold on the top plate. At this time, the operator can polish the car mold with the polishing machine. While the car mold is being polished, the operator turns on the bag filter. When the bag filter is turned on, it generates negative pressure. The vent holes and limiting grooves continuously adsorb the dust generated on the top plate into the collection chamber. The dust is then guided into the bag filter through pipe one and pipe two. At the same time, after turning on the bag filter, the operator turns on motor two. The output end of motor two drives the fan blades to rotate. When the fan blades rotate, they continuously blow the airflow on both sides towards the top plate, which facilitates the concentration of dust on the top plate until the car mold on the top plate is polished.

[0010] In the above technical solution, the power component further includes:

[0011] Motor 2 is fixedly installed on one side of the side frame. The output end of motor 2 passes through the side frame and is coaxially connected to the fan blade.

[0012] In this technical solution, the second motor can stably drive the fan blades to rotate, ensuring that the dust generated during the polishing of the car mold is concentrated and blown onto the top plate, making it easy for the collection box to collect the dust on the top plate.

[0013] In the above technical solution, further, a collection chamber is provided inside the collection box, the scraper is slidably connected to the collection chamber, the bottom of the scraper is in contact with the inner bottom wall of the collection chamber, the collection chamber is connected to a first connecting pipe, and one side of the first connecting pipe is fixedly connected to one side of the bag filter.

[0014] In this technical solution, when the scraper moves, it can scrape the dust in the collection chamber, and the dust in the collection chamber can be concentrated and scraped into the first and second connecting pipes, ensuring that the bag filter can collect the dust in a concentrated manner.

[0015] In the above technical solution, a screw is rotatably installed in the collection chamber, one side of the screw passes through the scraper, and the screw is threadedly connected to the scraper.

[0016] In this technical solution, the screw can stably control the movement of the scraper in the collection chamber, thereby stably controlling the lower clamping rod to hold the car mold on the top plate.

[0017] In the above technical solution, furthermore, both sides of the bag filter are fixedly installed with a second through pipe, and one side of the second through pipe is connected to the collection chamber.

[0018] In this technical solution, the dust collected in the collection room can be centrally fed into the bag filter through pipe one and pipe two, ensuring that dust does not accumulate in the collection room.

[0019] In the above technical solution, a sliding groove is further provided at the top of the lower clamping rod, and a sliding rod fixed to the bottom of the upper clamping rod is slidably installed in the sliding groove.

[0020] In this technical solution, the upper clamping rod can drive the sliding rod to move up and down in the sliding groove, thereby adjusting the position of the upper clamping rod, so that the upper clamping rod can drive the clamping head to adapt to the height of the automobile mold.

[0021] In the above technical solution, the bottom of the cleaning brush is in contact with the top of the top plate, and the top of the top plate has a downwardly concave arc surface.

[0022] In this technical solution, the top plate can concentrate the accumulated dust and guide it into the fan blades, ensuring that the accumulated dust can be collected in the collection chamber.

[0023] In the above technical solution, the limiting groove is further adapted to the connecting plate, the fan blade passes through the limiting groove and extends to the outside, and the limiting groove is located at the center of the top plate.

[0024] In this technical solution, the connecting plate can be restricted by the limiting groove, ensuring that the connecting plate can drive the lower clamping rod and the upper clamping rod to move continuously, thus avoiding the problem of deviation when the lower clamping rod moves.

[0025] In the above technical solution, the scraper is in the form of a right-angled trapezoidal structure, the inner bottom wall of the collection chamber is an inclined surface sloping towards the through pipe, a motor is fixedly installed on one side of the collection box, the output end of the motor passes through the collection box and is coaxially connected to the screw, and the output end of the motor is rotatably connected to the collection box.

[0026] In this technical solution, the screw rotation can be stably controlled by the motor, thereby ensuring that the scraper can be continuously moved in the collection chamber by the screw.

[0027] In the above technical solution, furthermore, a plurality of the clamping heads are arranged at equal intervals, the clamping heads are semi-capsule shaped structures, and the same clamping head is also fixedly installed on one side of the lower clamping rod.

[0028] In this technical solution, the clamping head can clamp the car mold onto the top plate, ensuring that the car mold will not move during polishing.

[0029] This invention provides a polishing device for automotive mold processing. It has the following beneficial effects:

[0030] 1. This invention employs a clamping structure with upper and lower clamping rods and a semi-capsule-shaped clamping head, which can stably clamp the mold from multiple directions, preventing displacement and shaking during polishing. The upper clamping rod achieves height adjustment through the cooperation of the sliding rod and the sliding groove, adapting to molds of different heights and improving positioning adaptability. The sliding cooperation between the connecting plate and the limiting groove ensures smooth movement of the clamping components, avoids positioning deviation, provides a stable foundation for high-precision polishing, and ensures that the surface roughness and geometric tolerances of the mold meet the requirements.

[0031] 2. The top plate of this invention has a downward-concave arc surface, which, together with the airflow guidance of the fan blades, can concentrate polishing debris towards the collection box; the bag filter forms a negative pressure circulation through the first and second through-pipes, and quickly adsorbs dust through the vent holes and limiting grooves, avoiding dust dispersion and pollution; the screw in the collection chamber drives the scraper to slide, which can push the debris to the through-pipe position, and together with the inclined inner bottom wall, the debris is concentrated and discharged. At the same time, the cleaning brush simultaneously cleans the residual debris on the top plate surface, realizing the whole process of "concentrated collection - rapid adsorption - thorough cleaning" of dust collection, which greatly improves the working environment.

[0032] 3. This invention uses the fan blades on the side frame to rotate under the drive of the second motor, continuously supplying air to the work area. This not only helps to concentrate and gather debris, but also removes the heat and some dust generated during polishing, reducing the ambient temperature and improving visibility. The vents and ventilation structure create air circulation, avoiding stuffiness and reducing operator fatigue, thus improving work safety and continuity.

[0033] 4. This invention integrates polishing, positioning, dust collection, and ventilation functions, eliminating the need for additional auxiliary equipment and simplifying the site layout; the clamping and cleaning components work together, and the positioning process simultaneously completes the pre-treatment of the top plate, allowing for rapid cleaning of debris after polishing, reducing process connection time; the bag filter achieves dust filtration, and the collected debris is easy to centrally recycle and reuse, reducing resource waste and environmental pressure; each component adopts modular assembly, making maintenance and replacement convenient, adaptable to the processing needs of different specifications of automotive molds, and highly versatile. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0035] Figure 2 This is a rear view of the present invention;

[0036] Figure 3 This is an exploded view of the clamping rod of the present invention;

[0037] Figure 4 This is a cross-sectional view of the inside of the collection box of the present invention;

[0038] Figure 5The interior structure diagrams are collected for this invention.

[0039] The markings in the diagram are as follows:

[0040] 1. Polishing table; 2. Polishing machine; 3. Collection box; 4. Collection chamber; 5. Screw; 6. Pipe 1; 7. Bag filter; 8. Pipe 2; 9. Motor 1; 10. Scraper; 11. Connecting plate; 12. Lower clamping rod; 13. Slide groove; 14. Cleaning brush; 15. Slide rod; 16. Upper clamping rod; 17. Clamping head; 18. Top plate; 19. Vent hole; 20. Limiting groove; 21. Side frame; 22. Fan blade; 23. Motor 2. Detailed Implementation

[0041] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0042] Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the invention, and should not be construed as limiting the invention.

[0043] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0044] Example 1: As Figure 1-5 As shown: This embodiment provides a polishing device for automotive mold processing, including a polishing table 1, a polishing machine 2 fixedly mounted on one side of the top of the polishing table 1, and further including:

[0045] Collection box 3 is fixedly installed on polishing table 1. The top of collection box 3 passes through polishing table 1 and extends to the outside. A bag filter 7 and a through pipe 6 are provided on one side of collection box 3. Two scrapers 10 are provided inside collection box 3. A connecting plate 11 is fixedly installed on the top of scraper 10. A cleaning brush 14 is fixedly installed on the top of connecting plate 11. A lower clamping rod 12 is fixedly installed on the top of cleaning brush 14. An upper clamping rod 16 is provided above the lower clamping rod 12. Several clamping heads 17 are provided on one side of the upper clamping rod 16.

[0046] The top plate 18 has a limited groove 20 and several ventilation holes 19. Side frames 21 are fixedly installed on both sides of the collection box 3, and a fan blade 22 is rotatably installed on one side of the side frame 21.

[0047] The power unit is located on one side of the side frame 21 and is used to drive the fan blades 22 to rotate.

[0048] The process involves placing the car mold to be polished on the top plate 18. Then, the operator turns on motor 9, which drives screw 5 to rotate. Under the action of the screw, the two scrapers 10 move closer together, causing the connecting plate 11, lower clamping rod 12, and upper clamping rod 16 to move synchronously towards the car mold until the clamping head 17 clamps the car mold onto the top plate 18. At this point, the operator can polish the car mold using polishing machine 2. While polishing the car mold, the operator turns on bag filter 7. When the filter 7 is turned on, it will generate negative pressure, and the vent 19 and the limiting groove 20 will continuously adsorb the dust generated on the top plate 18 into the collection chamber 4. Then, the dust will be introduced into the bag filter 7 through the first pipe 6 and the second pipe 8. At the same time, after the bag filter 7 is turned on, the second motor 23 will be turned on. The output end of the second motor 23 will drive the fan blade 22 to rotate. When the fan blade 22 rotates, it will continuously blow the airflow on both sides onto the top plate 18, which will facilitate the concentration of dust on the top plate 18 until the car mold on the top plate 18 is polished.

[0049] When the car mold is fixed on the top plate 18 by the lower clamping rod 12 and the upper clamping rod 16 and polished by the polishing machine 2, the bag filter 7 can continuously absorb the dust generated on the top plate 18 into the collection chamber 4 through the cooperation of the first pipe 6 and the second pipe 8, ensuring that the dust will not be dispersed in the air and eventually inhaled by personnel.

[0050] Example 2: This example provides a polishing device for automotive mold processing. In addition to the technical solutions described in the above examples, it also has the following technical features: the power component includes:

[0051] Motor 23 is fixedly installed on one side of side frame 21. The output end of motor 23 passes through side frame 21 and is coaxially connected to fan blade 22.

[0052] Among them, the motor 23 can stably drive the fan blade 22 to rotate, ensuring that the dust generated during the polishing of the car mold is concentrated and blown onto the top plate 18, so that the collection box 3 can collect the dust on the top plate 18.

[0053] Example 3: This example provides a polishing device for automobile mold processing. In addition to the technical solutions of the above examples, it also has the following technical features: a collection chamber 4 is provided in the collection box 3, the scraper 10 is slidably connected to the collection chamber 4, the bottom of the scraper 10 is in contact with the inner bottom wall of the collection chamber 4, the collection chamber 4 is connected to the through pipe 6, and one side of the through pipe 6 is fixedly connected to one side of the bag filter 7.

[0054] When the scraper 10 moves, it can scrape the dust in the collection chamber 4, and the dust in the collection chamber 4 can be concentrated and scraped into the first pipe 6 and the second pipe 8, so that the bag filter 7 can collect the dust in a concentrated manner.

[0055] Example 4: This example provides a polishing device for automobile mold processing. In addition to the technical solutions of the above examples, it also has the following technical features: a screw 5 is rotatably installed in the collection chamber 4, one side of the screw 5 passes through the scraper 10, and the screw 5 is threadedly connected to the scraper 10.

[0056] The screw 5 can stably control the movement of the scraper 10 in the collection chamber 4, thereby stably controlling the lower clamping rod 12 to clamp the car mold on the top plate 18.

[0057] Example 5: This example provides a polishing device for automobile mold processing. In addition to the technical solutions of the above examples, it also has the following technical features: both sides of the bag filter 7 are fixedly installed with a second pipe 8, and one side of the second pipe 8 is connected to the collection chamber 4.

[0058] The dust collected in the collection chamber 4 can be concentrated into the bag filter 7 through the first pipe 6 and the second pipe 8, ensuring that dust does not accumulate in the collection chamber 4.

[0059] Example 6: This example provides a polishing device for automobile mold processing. In addition to the technical solutions of the above examples, it also has the following technical features: a groove 13 is provided on the top of the lower clamping rod 12, and a sliding rod 15 fixed to the bottom of the upper clamping rod 16 is slidably installed in the groove 13.

[0060] The upper clamping rod 16 can drive the slide rod 15 to move up and down in the slide groove 13, thereby adjusting the position of the upper clamping rod 16 so that the upper clamping rod 16 can drive the clamping head 17 to adapt to the height of the automobile mold.

[0061] Example 7: This example provides a polishing device for automobile mold processing. In addition to the technical solutions of the above examples, it also has the following technical features: the bottom of the cleaning brush 14 is in contact with the top of the top plate 18, and the top of the top plate 18 is a downwardly concave arc surface.

[0062] The top plate 18 can guide the accumulated dust into the fan blades 22, ensuring that the accumulated dust can be collected in the collection chamber 4.

[0063] Example 8: The limiting groove 20 is slidably adapted to the connecting plate 11, the fan blade 22 passes through the limiting groove 20 and extends to the outside, and the limiting groove 20 is located at the center of the top plate 18.

[0064] The connecting plate 11 can be restricted by the limiting groove 20 to ensure that the connecting plate 11 can drive the lower clamping rod 12 and the upper clamping rod 16 to move continuously, thus avoiding the problem of the lower clamping rod 12 deviating when it moves.

[0065] Example 9: The scraper 10 has a right-angled trapezoidal structure. The inner bottom wall of the collection chamber 4 is an inclined surface that slopes towards the through pipe 6. A motor 9 is fixedly installed on one side of the collection box 3. The output end of the motor 9 passes through the collection box 3 and is coaxially connected to the screw 5. The output end of the motor 9 is rotatably connected to the collection box 3.

[0066] Among them, the rotation of the screw 5 can be stably controlled by the motor 9, thereby ensuring that the scraper 10 can be continuously moved in the collection chamber 4 by the screw 5.

[0067] Example 10: Several clamping heads 17 are arranged at equal intervals. The clamping heads 17 have a semi-capsule-shaped structure. The same clamping heads 17 are also fixedly installed on one side of the lower clamping rod 12.

[0068] The clamping head 17 can clamp the car mold onto the top plate 18, ensuring that the car mold will not move during polishing.

[0069] Working principle: First, the operator places the car mold to be polished on the top plate 18. Then, the operator turns on motor 9. When motor 9 is turned on, it drives screw 5 to rotate. Under the action of the screw, the two scrapers 10 will move closer to each other. Scrapers 10 will drive connecting plate 11, lower clamping rod 12, and upper clamping rod 16 to move synchronously towards the car mold until the clamping head 17 clamps the car mold on the top plate 18. At this time, the operator can polish the car mold using polishing machine 2. While polishing the car mold, the operator turns on bag filter 7. When bag filter 7 is turned on, it will... A negative pressure is generated, and the vent 19 and limiting groove 20 will continuously adsorb the dust generated on the top plate 18 into the collection chamber 4. Then, the dust is introduced into the bag filter 7 through the first pipe 6 and the second pipe 8. At the same time, after the bag filter 7 is turned on, the second motor 23 is turned on. The output end of the second motor 23 will drive the fan blade 22 to rotate. When the fan blade 22 rotates, it will continuously blow the airflow on both sides onto the top plate 18, which will facilitate the concentration of dust on the top plate 18. After the car mold on the top plate 18 is polished, the personnel can remove the car mold from the top plate 18.

[0070] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0071] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A polishing device for automotive mold processing, characterized in that, The polishing device mainly includes a polishing table (1) for supporting various components, a polishing machine (2) for polishing the mold, a collection component for collecting polishing debris, a ventilation component for ventilation assistance, a power component for driving the components to run, and a clamping component for positioning the mold.

2. The polishing device for automotive mold processing according to claim 1, characterized in that, The polishing table (1) is a horizontal plate structure, providing a stable bearing base for polishing operations; a polishing machine (2) is fixedly installed on one side of the top of the polishing table (1), and the polishing machine (2) is used to polish the car mold; a collection box (3) is also fixedly installed on the polishing table (1), and the top of the collection box (3) penetrates through the polishing table (1) and extends to the outside, and is used to collect the debris and dust generated during the polishing process.

3. The polishing apparatus for automotive mold processing according to claim 2, characterized in that, The collection box (3) has a collection chamber (4) for storing debris. The bottom wall of the collection chamber (4) is an inclined surface that is inclined to one side, which makes it easy for debris to converge at a designated location. A screw (5) is rotatably installed in the collection chamber (4). A motor (9) is fixedly installed on one side of the collection box (3). The output end of the motor (9) passes through the collection box (3) and is coaxially fixedly connected with the screw (5). The output end of the motor (9) is rotatably engaged with the collection box (3), and the screw (5) is driven to rotate stably by the motor (9).

4. The polishing apparatus for automotive mold processing according to claim 3, characterized in that, Two scrapers (10) are slidably installed in the collection chamber (4). The scraper (10) has a right-angled trapezoidal structure and its bottom is in close contact with the inner bottom wall of the collection chamber (4). One side of the screw (5) passes through the scraper (10) and is threadedly connected to the scraper (10). The rotation of the screw (5) drives the scraper (10) to slide along the collection chamber (4) and pushes the debris to the collection point. A connecting plate (11) is fixedly installed on the top of the scraper (10). A cleaning brush (14) is fixedly installed on the top of the connecting plate (11) for cleaning residual debris on the surface of the polishing table.

5. The polishing apparatus for automotive mold processing according to claim 2, characterized in that, The collection box (3) is provided with a first pipe (6) and a bag filter (7) on one side. The collection chamber (4) is connected to the first pipe (6). One side of the first pipe (6) is fixedly connected to one side of the bag filter (7) to guide the collected dust into the filtration equipment. The bag filter (7) is fixedly installed with a second pipe (8) on both sides. One side of the second pipe (8) is connected to the collection chamber (4) to form a circulating filtration channel and improve the dust filtration effect.

6. The polishing apparatus for automotive mold processing according to claim 2, characterized in that, The device also includes a top plate (18), the top of which is a downward-concave arc surface, which facilitates the sliding of debris into the collection box (3). A limiting groove (20) and several ventilation holes (19) are provided on the top plate (18). The ventilation holes (19) are used for ventilation. The limiting groove (20) is located in the center of the top plate (18) and is slidably adapted to the connecting plate (11) to ensure that the connecting plate (11) drives the cleaning brush (14) to move smoothly. The bottom of the cleaning brush (14) is in close contact with the top of the top plate (18) to achieve comprehensive cleaning.

7. The polishing apparatus for automotive mold processing according to claim 6, characterized in that, Both sides of the collection box (3) are fixedly installed with side frames (21), which are used to install ventilation and power components. A fan blade (22) is rotatably installed on one side of the side frame (21). The fan blade (22) passes through the limiting groove (20) and extends to the outside. The power component is located on one side of the side frame (21) and is used to drive the fan blade (22) to rotate. The power component includes a second motor (23). The second motor (23) is fixedly installed on one side of the side frame (21). Its output end passes through the side frame (21) and is coaxially fixedly connected with the fan blade (22) to drive the fan blade (22) to rotate and achieve ventilation.

8. The polishing apparatus for automotive mold processing according to claim 4, characterized in that, The lower clamping rod (12) is fixedly installed on the top of the connecting plate (11). An upper clamping rod (16) is provided above the lower clamping rod (12). A sliding groove (13) is provided on the top of the lower clamping rod (12). A sliding rod (15) fixed to the bottom of the upper clamping rod (16) is slidably installed in the sliding groove (13). The upper clamping rod (16) can be adjusted by the cooperation of the sliding rod (15) and the sliding groove (13). Several clamping heads (17) are provided on one side of the upper clamping rod (16) at equal intervals. The same clamping heads (17) are also fixedly installed on one side of the lower clamping rod (12). The clamping heads (17) are semi-capsule shaped structures, which are used to firmly clamp the car mold and prevent it from shifting during polishing.

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