Surface polishing device for laser film production

Abstract

The utility model relates to the technical field of laser film production, and discloses a surface polishing device for laser film production, which comprises a support bottom plate, a laser film transmission part and a laser film polishing dust collection part, support legs are fixedly mounted on the outer wall of the bottom of the support bottom plate, and support cushion blocks are fixedly mounted on the outer walls of the bottoms of the support legs; and the laser film transmission part is arranged at the top of the supporting bottom plate. Through a dust collection system composed of the dust collector, the dust collection box, the dust collection pipe and all dust collection parts, chippings and dust generated by polishing on the surface of a laser film can be collected in time in the polishing process, lifting of the polishing frame is controlled through stretching and retracting of the electric telescopic rod, and through cooperation of the supporting sliding rod, the spring and the limiting plate, the polishing effect is improved. The polishing roller can adjust the pressure in a self-adaptive mode according to the thickness and the surface flatness of the laser film, the polishing supporting plate provides a stable installation foundation for the whole polishing dust collection part, and the stability of parts such as the electric telescopic rod and the polishing frame in the working process is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to laser film production technical field, concretely is a surface polishing device for laser film production. BACKGROUND

[0002] In the production process of laser film, surface polishing is a key process, and its quality directly affects the optical performance, appearance and subsequent use effect of the laser film. With the wide application of laser film in packaging, decoration, electronics and many other fields, the requirement for its surface quality is also increasing.

[0003] The traditional laser film polishing equipment has many deficiencies. In terms of dust collection, most early equipment does not have perfect dust collection device or the dust collection effect is poor, and the debris and dust generated in the polishing process cannot be effectively removed in time. These impurities are easy to adhere to the surface of the laser film, which not only affects the smoothness and optical performance of the laser film, leading to defects such as surface pitting, increased haze and other problems, but also may cause wear to the equipment in the subsequent processing or use process, shorten the service life of the equipment, and at the same time, in the polishing pressure control, it is difficult to adjust the pressure according to the actual thickness and surface flatness of the laser film. If the polishing pressure is too large, it may cause the surface of the laser film to be excessively worn or even damaged, reducing the qualified rate of the product; and if the pressure is too small, the expected polishing effect cannot be achieved, affecting the production efficiency and product quality. In addition, due to the possible uneven thickness of the laser film in the production process, the fixed pressure polishing method cannot adapt to such changes, further aggravating the instability of the product quality. SUMMARY

[0004] The utility model aims at providing a surface polishing device for laser film production to solve the problems in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a surface polishing device for laser film production, comprising a support bottom plate, a laser film transmission part and a laser film polishing dust collection part, a support leg is fixedly installed on the bottom outer wall of the support bottom plate, and a support pad is fixedly installed on the bottom outer wall of the support leg; the laser film transmission part is arranged on the top of the support bottom plate; and the laser film polishing dust collection part is arranged on the top of the laser film transmission part.

[0006] Preferably, the laser film transmission part specifically comprises: a support fixed block one fixedly installed on the top outer wall of the support bottom plate; a support fixed block two fixedly installed on the top outer wall of the support bottom plate; and a polishing protection box fixedly installed on the top outer wall of the support bottom plate.

[0007] Preferably, the two sides of the polishing protection box are provided with rectangular access ports, and the side wall of the polishing protection box is provided with an observation window.

[0008] The transmission motor one drives the transmission roller to rotate, and the transmission roller outer wall circumferentially fixed abrasive strip block can be preliminary polished in the process of laser film transmission, increase the surface roughness, lay the foundation for subsequent fine polishing, and the transmission motor two drives the winding roller to rotate, and the winding roller winds the preliminary processed laser film at a suitable speed, which matches the rotation speed of the transmission roller, and ensures that the laser film always maintains stable tension and uniform transmission state in the whole polishing process. This stable transmission not only improves the uniformity of polishing, avoids the polishing quality problem caused by uneven stretching of the film material, but also enables the laser film to pass through each polishing and processing link in order, greatly improves the production efficiency, and meets the needs of industrialized mass production.

[0009] Preferably, the output ends of the transmission motor one and the transmission motor two are respectively movably penetrated through one side wall of the support fixed block one and the support fixed block two, and extend to the other side wall of the support fixed block one and the support fixed block two, and the output ends of the transmission motor one and the transmission motor two are respectively fixedly connected with the transmission roller and the winding roller, and the other ends of the transmission roller and the winding roller are respectively rotatably connected with the outer walls of the support fixed block one and the support fixed block two, and the outer walls of the transmission roller and the winding roller are circumferentially fixedly installed with abrasive strip blocks.

[0010] Preferably, the laser film polishing dust collection part comprises: a dust collector arranged at the bottom of the support bottom plate; a dust collection box fixedly installed at the top of the polishing protection box; an electric telescopic rod arranged at the top of the polishing protection box; and a polishing support plate fixedly installed on the inner wall of the polishing protection box.

[0011] Preferably, the dust collection box is internally provided with a circular through groove, the electric telescopic rod is arranged in the circular through groove, the electric telescopic rod is fixedly installed at the top of the polishing protection box, the outer wall of the electric telescopic rod is fixedly installed with a fixed frame, the inner wall of the dust collection box is fixedly installed with a partition plate, the partition plate is circumferentially and equidistantly provided with a circular port, the inner wall of the circular port is fixedly installed with a filter screen, the dust suction end of the dust collector is communicated with a dust suction pipe, the other end of the dust suction pipe is communicated with the dust collection box, and the polishing support plate is provided with a through port, and the through port is slidably connected with a support slide rod.

[0012] The dust collection box is arranged, when the dust collector works, a negative pressure environment is formed in the dust collection box, air is sucked into the dust collection box from the polishing protection box, clean air is discharged after being filtered by the filter screen, this process not only removes impurities, but also promotes air circulation in the polishing protection box, helps to dissipate heat generated during polishing, avoids that local high temperature causes adverse effects on the laser film and equipment, meanwhile, air purification provides a relatively healthy and clean working environment for the operator, reduces dust stimulation and damage to the respiratory tract of the operator, and meets the requirements of safety production and environmental protection.

[0013] Preferably, one end of the supporting slide rod is movably arranged through the inner wall of the polishing protection box and the top outer wall of the supporting bottom plate, and extends to the bottom outer wall of the supporting bottom plate, the other end of the supporting slide rod is fixedly connected with the limiting plate, the outer wall of the supporting slide rod is sleeved with a spring, one end of the spring is fixedly connected with the bottom outer wall of the supporting bottom plate, the other end of the spring is fixedly connected with the limiting plate, and the telescopic end of the electric telescopic rod is movably arranged through the top outer wall of the polishing protection box and extends to the inside of the polishing protection box.

[0014] Preferably, the telescopic end of the electric telescopic rod is fixedly connected with the polishing frame, polishing rollers are equidistantly arranged between the inner walls of the polishing frame, the outer walls of the polishing frame are fixedly connected with the connecting plates, the dust collection block is fixedly arranged between the connecting plates, the dust collection hopper is arranged in communication at the bottom of the dust collection block, the dust collection hose is arranged in communication at the top of the dust collection block, the other end of the dust collection hose is movably arranged through the inner wall of the polishing protection box and extends to the top outer wall of the polishing protection box, and the other end of the dust collection hose is connected with the dust collection box.

[0015] The electric telescopic rod is arranged, when the electric telescopic rod drives the polishing frame to move up and down for polishing, the dust collection block also moves synchronously, so that the dust collection hopper is always close to the polishing area, and the generated debris and dust during polishing can be effectively sucked in time, the polishing and dust collection are closely matched in the cooperative working mode, the polishing effect is ensured, the working area is kept clean, the adverse effects of debris and dust on the quality of the laser film and the internal components of the equipment are avoided, the working performance and stability of the whole device are improved, and the service life of the equipment is prolonged.

[0016] The surface polishing device for laser film production has the following beneficial effects:

[0017] (1), the utility model discloses a transmission motor one and transmission motor two drive transmission roll and winding roll respectively, can provide stable and continuous power for laser film, guarantee laser film even speed, stablely move in polishing process, this kind of stable conveying mode avoids the polishing flaw that laser film produces when polishing because of uneven speed or jam, improves the consistency and stability of product surface quality, thereby guarantees the production quality of laser film, reduces the rate of defective products, and the outer wall circumference equidistance fixed mounting of transmission roll and winding roll abrasive grain strip block, not only play the role of conveying laser film in the transmission process, still can carry out the preliminary polishing and pretreatment to laser film surface, when laser film passes transmission roll, abrasive grain strip block contacts with laser film surface, removes some more obvious convex and rough part, lays the foundation for the fine polishing of polishing roller on the subsequent polishing frame.

[0018] (2), the utility model discloses a dust collection system that is composed of a dust collector, a dust collection box, a dust collection pipe and various dust collection components, which can timely suck and remove the debris and dust generated on the surface of the laser film during polishing. The lifting of the polishing frame is controlled by the extension and retraction of the electric telescopic rod. In combination with the supporting slide rod, the spring and the limiting plate, the polishing roller can self-adaptively adjust the pressure according to the thickness and surface flatness of the laser film. The polishing support plate provides a stable installation foundation for the entire polishing dust collection part, ensuring the stability of the electric telescopic rod, the polishing frame and other components during work. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a front view of the overall structure of the utility model;

[0020] Figure 2 It is a partial view of the laser film transmission part of the utility model;

[0021] Figure 3 It is a partial sectional view of the dust collection box of the utility model;

[0022] Figure 4 It is a partial view of the laser film polishing dust collection part of the utility model.

[0023] In the drawing: 1 is a supporting bottom plate, 2 is a supporting leg, 3 is a laser film transmission part, 311 is a supporting fixed block one, 312 is a supporting fixed block two, 313 is a transmission motor one, 314 is a winding roll, 315 is a polishing protection box, 316 is a transmission roll, 317 is an entry-exit rectangular port, 318 is an observation window, 319 is a transmission motor two, 4 is a laser film polishing dust collection part, 411 is a fixed frame, 412 is an electric telescopic rod, 413 is a dust collection box, 414 is a partition, 415 is a filter screen, 416 is a dust collection pipe, 417 is a dust collection hose, 418 is a dust collector, 419 is a polishing support plate, 4111 is a supporting slide rod, 4112 is a spring, 4113 is a limiting plate, 4114 is a polishing frame, 4115 is a dust collection block, 4116 is a connecting plate, 4117 is a polishing roller. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0025] Examples of the embodiments are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0026] Embodiment one:

[0027] The preferred embodiment of the surface polishing device for laser film production provided by the present application is shown in the figure: Figures 1-4 The surface polishing device for laser film production comprises a supporting bottom plate 1, a laser film transmission part 3, and a laser film polishing and dust collection part 4. The supporting legs 2 are fixedly installed on the bottom outer wall of the supporting bottom plate 1, and the supporting pads are fixedly installed on the bottom outer wall of the supporting legs 2. The laser film transmission part 3 is arranged on the top outer wall of the supporting bottom plate 1. The laser film polishing and dust collection part 4 is arranged on the top of the laser film transmission part 3.

[0028] The laser film transmission part 3 specifically comprises: a supporting fixed block one 311 fixedly installed on the top outer wall of the supporting bottom plate 1; a supporting fixed block two 312 fixedly installed on the top outer wall of the supporting bottom plate 1; and a polishing protection box 315 fixedly installed on the top outer wall of the supporting bottom plate 1.

[0029] The polishing protection box 315 is provided with an observation window 318 on one side of the outer wall, and the outer walls of the supporting fixed block one 311 and the supporting fixed block two 312 are fixedly installed with a motor fixing frame. The inner part of the motor fixing frame is fixedly installed with a transmission motor one 313 and a transmission motor two 319, respectively.

[0030] The output ends of the transmission motor one 313 and the transmission motor two 319 are respectively movably penetrated through one side of the outer wall of the supporting fixed block one 311 and the supporting fixed block two 312, and extend to the other side of the outer wall of the supporting fixed block one 311 and the supporting fixed block two 312. The output ends of the transmission motor one 313 and the transmission motor two 319 are fixedly connected with a transmission roller 316 and a winding roller 314, respectively. The other ends of the transmission roller 316 and the winding roller 314 are rotatably connected with the outer walls of the supporting fixed block one 311 and the supporting fixed block two 312, respectively. The outer walls of the transmission roller 316 and the winding roller 314 are fixedly installed with a grinding strip block at a circumferential equidistant position.

[0031] In the process of the embodiment, the transmission motor one 313 and the transmission motor two 319 are started, the transmission motor one 313 drives the transmission roller 316 to start rotating, through the friction force between the grinding strip block on the outer wall of the transmission roller 316 and the laser film, the laser film is driven to move at a constant speed in the direction of the winding roller 314; at the same time, the transmission motor two 319 drives the winding roller 314 to rotate at a speed and direction matched with the transmission roller 316, so as to wind the laser film after polishing treatment, ensure that the laser film maintains stable tension and speed during the whole polishing process, avoid problems such as film surface wrinkles or excessive stretching, and the like, with the transmission of the laser film, the electric telescopic rod 412 starts to work according to the preset program or manual control instruction, pushes the polishing frame 4114 to move downward, so that the polishing roller 4117 gradually contacts the surface of the laser film, and starts to polish the laser film, in the process of contacting and relative movement with the laser film, the polishing roller 4117 uses the polishing material and structure on the surface to polish, smooth and finish the surface of the laser film, remove the defects, scratches and roughness on the surface of the laser film, and improve the surface quality and optical performance of the laser film.

[0032] Embodiment two

[0033] On the basis of the embodiment one, the preferable embodiment of the surface polishing device for laser film production provided by the utility model like Figures 1-4 As shown in the figure: the laser film polishing dust collection part 4 specifically comprises: a dust collector 418 arranged at the bottom of the support bottom plate 1; a dust collection box 413 fixedly installed at the top of the polishing protection box 315; an electric telescopic rod 412 arranged at the top of the polishing protection box 315; and a polishing support plate 419 fixedly installed on the inner wall of the polishing protection box 315.

[0034] The dust collection box 413 is internally provided with a circular through groove, the electric telescopic rod 412 is arranged in the circular through groove, the electric telescopic rod 412 is fixedly installed at the top of the polishing protection box 315, a fixed frame 411 is fixedly installed on the outer wall of the electric telescopic rod 412, a partition plate 414 is fixedly installed on the inner wall of the dust collection box 413, circular openings are circumferentially and equidistantly arranged on the partition plate 414, a filter screen 415 is fixedly installed on the inner wall of the circular opening, a dust collection pipe 416 is in communication with the dust collection end of the dust collector 418, the other end of the dust collection pipe 416 is in communication with the dust collection box 413, and a through opening is arranged on the polishing support plate 419, and a support sliding rod 4111 is slidably connected in the through opening.

[0035] One end of the supporting slide rod 4111 is movably penetrated through the inner wall of the polishing protection box 315 and the top outer wall of the supporting bottom plate 1 respectively, and extends to the bottom outer wall of the supporting bottom plate 1, and the other end of the supporting slide rod 4111 is fixedly connected with the limiting plate 4113, and the outer wall of the supporting slide rod 4111 is sleeved with the spring 4112, one end of the spring 4112 is fixedly connected with the bottom outer wall of the supporting bottom plate 1, and the other end of the spring 4112 is fixedly connected with the limiting plate 4113, and the telescopic end of the electric telescopic rod 412 is movably penetrated through the top outer wall of the polishing protection box 315 and extends to the inside of the polishing protection box 315.

[0036] The telescopic end of the electric telescopic rod 412 is fixedly connected with the polishing frame 4114, equidistantly arranged between the inner walls of the polishing frame 4114 are the polishing rollers 4117, the outer walls of the two sides of the polishing frame 4114 are both fixedly installed with the connecting plates 4116, the connecting plates 4116 are fixedly installed with the dust suction block 4115, the bottom of the dust suction block 4115 is communicatively provided with the dust suction hopper, the top of the dust suction block 4115 is communicatively provided with the dust suction hose 417, the other end of the dust suction hose 417 is movably penetrated through the inner wall of the polishing protection box 315 and extends to the top outer wall of the polishing protection box 315, and the other end of the dust suction hose 417 is in communication with the dust suction box 413.

[0037] In the process of the embodiment, in the polishing process, the dust suction hopper at the bottom of the dust suction block 4115 is closely attached to the surface of the laser film, due to the negative pressure effect of the dust collector 418, the impurities such as debris and dust generated in the polishing process are sucked into the inside of the dust suction block 4115 through the dust suction hopper, and are transmitted to the dust suction box 413 through the dust suction hose 417, the air and impurities entering the dust suction box 413 are first filtered through the filter screen 415 on the partition plate 414, the dust and debris are intercepted on the filter screen 415, and the clean air is discharged by the dust collector 418 through the dust suction pipe 416, so that the polishing area is continuously cleaned, and the dust and debris are prevented from being attached to the surface of the laser film again in the polishing process, so as to affect the polishing effect and product quality.

[0038] Working principle: in use:

[0039] Step one: install the laser film roll on the transmission roller 316, one end of the film is fixedly connected with the winding roller 314 through the dust suction hopper below the dust suction block 4115, ensure that the laser film is in a taut state and the position is appropriate, and can smoothly pass through the polishing area and the rectangular port 317;

[0040] Step two: start transmission motor one 313 and transmission motor two 319, transmission motor one 313 drives transmission roller 316 to start rotating, through the friction force between the grinding strip block on the outer wall of transmission roller 316 and the laser film, drive the laser film to move at a constant speed to the direction of winding roller 314; at the same time, transmission motor two 319 drives winding roller 314 to rotate at a speed and direction matched with transmission roller 316;

[0041] Step four: in the polishing process, the dust suction hopper at the bottom of dust suction block 4115 is closely attached to the surface of the laser film, due to the negative pressure effect generated by dust collector 418, the debris, dust and other impurities generated in the polishing process are sucked into the inside of dust suction block 4115 through the dust suction hopper, and are transmitted to dust suction box 413 through dust suction hose 417, the air and impurities entering dust suction box 413 first pass through filter screen 415 on partition plate 414 for filtration, the dust and debris are intercepted on filter screen 415, and the clean air is discharged by dust collector 418 through dust suction pipe 416, at the same time, the elastic support structure composed of supporting slide rod 4111, spring 4112 and limiting plate 4113 monitors and adjusts the pressure of polishing frame 4114 in real time, when the surface of the laser film has uneven thickness or local protrusion, spring 4112 will automatically expand and contract according to the pressure change, driving supporting slide rod 4111 to slide in the through hole of polishing support plate 419, so as to adjust the pressure between polishing roller 4117 and the laser film, ensuring that the pressure in the polishing process is always kept within a suitable range, which can not only ensure good polishing effect, but also avoid damage to the laser film caused by excessive pressure;

[0042] Step five: when the laser film is completely polished and wound by winding roller 314, the operation of transmission motor one 313, transmission motor two 319 and dust collector 418 is stopped in turn, electric telescopic rod 412 lifts polishing frame 4114 to the initial position, facilitating the preparation for the next polishing operation, such as cleaning the impurities remaining on the surface of polishing roller 4117, checking and replacing the worn polishing material, etc., the operator takes the wound laser film product from winding roller 314, and performs comprehensive cleaning and maintenance on the equipment, checks the wear condition of each part, and prepares for the next batch of laser film polishing production.

[0043] Finally, it should be noted that the above description is only a preferred embodiment of the present application and is not intended to limit the present application, although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for some technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A surface polishing device for laser film production, comprising a support base plate (1), a laser film transmission part (3), and a laser film polishing and dust collection part (4), characterized in that, The bottom outer wall of the support bottom plate (1) is fixedly installed with a support leg (2), and the bottom outer wall of the support leg (2) is fixedly installed with a support pad; the laser film transmission part (3) is arranged at the top of the support bottom plate (1); and the laser film polishing dust collection part (4) is arranged at the top of the laser film transmission part (3).

2. The surface polishing device for laser film production according to claim 1, wherein The laser film transmission part (3) specifically comprises: A support fixed block one (311) is fixedly installed at the top outer wall of the support bottom plate (1); A support fixed block two (312) is fixedly installed at the top outer wall of the support bottom plate (1); A polishing protection box (315) is fixedly installed at the top outer wall of the support bottom plate (1).

3. The surface polishing apparatus for laser film production according to claim 2, wherein Rectangular inlet and outlet openings (317) are formed in the two side outer walls of the polishing protection box (315), an observation window (318) is arranged on one side outer wall of the polishing protection box (315), motor fixing frames are fixedly installed on the outer walls of the support fixed block one (311) and the support fixed block two (312), and a transmission motor one (313) and a transmission motor two (319) are respectively fixedly installed in the motor fixing frames.

4. The surface polishing device for laser film production according to claim 3, wherein Output ends of the transmission motor one (313) and the transmission motor two (319) are movably penetrated through one side outer walls of the support fixed block one (311) and the support fixed block two (312) and extend to the other side outer walls of the support fixed block one (311) and the support fixed block two (312), and transmission rollers (316) and winding rollers (314) are respectively fixedly connected to the output ends of the transmission motor one (313) and the transmission motor two (319), and the other ends of the transmission rollers (316) and the winding rollers (314) are rotatably connected to the outer walls of the support fixed block one (311) and the support fixed block two (312), and abrasive strip blocks are fixedly installed on the outer walls of the transmission rollers (316) and the winding rollers (314) at equal distances in the circumferences.

5. The surface polishing apparatus for laser film production according to claim 1, wherein The laser film polishing dust collection part (4) specifically comprises: A dust collector (418) is arranged at the bottom of the support bottom plate (1); A dust collection box (413) is fixedly installed at the top of the polishing protection box (315); An electric telescopic rod (412) is arranged at the top of the polishing protection box (315); A polishing support plate (419) is fixedly installed on the inner wall of the polishing protection box (315).

6. The surface polishing apparatus for laser film production according to claim 5, wherein A circular through groove is formed in the dust collection box (413), the electric telescopic rod (412) is arranged in the circular through groove, the electric telescopic rod (412) is fixedly installed at the top of the polishing protection box (315), a fixing frame (411) is fixedly installed on the outer wall of the electric telescopic rod (412), a partition plate (414) is fixedly installed on the inner wall of the dust collection box (413), circular openings are formed in the partition plate (414) at equal distances in the circumference, a filter screen (415) is fixedly installed on the inner wall of the circular opening, a dust collection pipe (416) is in communication with the dust suction end of the dust collector (418), the other end of the dust collection pipe (416) is in communication with the dust collection box (413), and a through opening is formed in the polishing support plate (419), and a support sliding rod (4111) is slidably connected in the through opening.

7. The surface polishing apparatus for laser film production according to claim 6, wherein One end of the supporting slide rod (4111) is movably penetrated through the inner wall of the polishing protection box (315) and the top outer wall of the support bottom plate (1) respectively and extends to the bottom outer wall of the support bottom plate (1), the other end of the supporting slide rod (4111) is fixedly connected with the limiting plate (4113), the outer wall of the supporting slide rod (4111) is sleeved with the spring (4112), one end of the spring (4112) is fixedly connected with the bottom outer wall of the support bottom plate (1), the other end of the spring (4112) is fixedly connected with the limiting plate (4113), and the telescopic end of the electric telescopic rod (412) is movably penetrated through the top outer wall of the polishing protection box (315) and extends to the inside of the polishing protection box (315).

8. The surface polishing apparatus for laser film production according to claim 7, wherein The telescopic end of the electric telescopic rod (412) is fixedly connected with the polishing frame (4114), the inner walls of the polishing frame (4114) are equidistantly provided with the polishing rollers (4117), the outer walls on the two sides of the polishing frame (4114) are both fixedly installed with the connecting plates (4116), the connecting plates (4116) are fixedly installed with the dust suction blocks (4115), the bottom of the dust suction block (4115) is communicatively provided with the dust suction hopper, the top of the dust suction block (4115) is communicatively provided with the dust suction hose (417), the other end of the dust suction hose (417) is movably penetrated through the inner wall of the polishing protection box (315) and extends to the top outer wall of the polishing protection box (315), and the other end of the dust suction hose (417) is in communication with the dust suction box (413).

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