CN217668471U - Hard plastic edge smoothing device - Google Patents

Abstract

The utility model relates to the technical field of plastic edge smoothing, in particular to a rigid plastic edge smoothing device, which improves the effect of the device on simultaneously smoothing both sides of a plastic plate, improves the processing efficiency and improves the functionality of the device; the on-line screen storage device comprises a base, fixing device, two sets of front and back aversion mechanisms, two sets of hydraulic stretching arm, first casing, the mobile device, two sets of second casing, two sets of first motors, two sets of pivot and two sets of head of polishing, base top middle part is provided with fixing device, fixing device is used for fixing the plastic slab, two sets of front and back aversion mechanisms are installed respectively in base top left and right sides two, the stiff end of two sets of hydraulic stretching arm is installed respectively on two sets of front and back aversion mechanism output, the removal end of two sets of hydraulic stretching arm all is connected with first casing bottom, be provided with the mobile device on the first casing, two sets of second casing tops all are connected with the mobile device, the mobile device is used for driving two sets of second casing opposite directions and removes.

Description

Hard plastic edge smoothing device

Technical Field

The utility model relates to a plastics border smooth processing's technical field especially relates to a stereoplasm plastics border smoothing device.

Background

Plastics are with the monomer as the raw materials, macromolecular compound that polymerization formed through addition polymerization or condensation polymerization, its anti deformability is moderate, between fibre and rubber, by synthetic resin and filler, the plasticizer, the stabilizer, the lubricant, additives such as colouring material constitute, make plastics into rigid plastic flat board after, usually need carry out smooth processing to the border of plastic slab border, at present when carrying out smooth processing to the plastic slab border, in prior art CN202022556630.0, the device will need the plastic slab of edging to place on placing the board, the screw on two dead levers makes the screw move extrusion fixed plastic slab downwards in the inside of screw hole, will place the board after lining up joint piece and joint groove and put into the inside start edging device of working hole, promote to pull through two pull rings and place the board and slide left and right in the inside of working hole, realized the cutting of cutting to border department and polish the plastic slab, but the device finds when using, the device can only polish smooth processing to one side border of plastic slab once, work efficiency is lower, consequently, propose a smooth device of smooth processing to the both sides border simultaneously, improve processing efficiency.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides an improve device improves machining efficiency to the effect of plastic slab both sides smooth processing simultaneously, improves the functional stereoplasm plastics border smoothing device of device.

The utility model discloses a stereoplasm plastics border smoothing device, the on-line screen storage device comprises a base, a fixing device, two sets of front and back shift mechanism, two sets of hydraulic telescopic arm, a first shell, a mobile device, two sets of second shell, two sets of first motors, two sets of pivot and two sets of polishing heads, base top middle part is provided with fixing device, fixing device is used for fixing the plastic slab, two sets of front and back shift mechanism install respectively in base top left and right sides two, the stiff end of two sets of hydraulic telescopic arm is installed respectively on two sets of front and back shift mechanism output, the removal end of two sets of hydraulic telescopic arm all is connected with first shell bottom, be provided with the mobile device on the first shell, two sets of second shell top all are connected with the mobile device, the mobile device is used for driving two sets of second shell opposite-direction movement, two sets of first motors are installed respectively in two sets of second shell, two sets of pivot top are respectively through bearing rotation installation in two sets of second shell bottom, two sets of first motor output is connected with two sets of pivot tops are concentric respectively, two sets of polishing heads respectively with pivot bottom fixed connection, and two sets of polishing heads are respectively set up to "T" shape respectively; the device comprises a fixing device, a first shell, two sets of hydraulic telescopic arms, a second shell, two sets of grinding heads, a moving device, a shifting mechanism, a front shifting mechanism, a back shifting mechanism, two sets of front shifting mechanisms, two sets of back shifting mechanisms, two sets of front shifting mechanisms, two sets of rear shifting mechanisms, two sets of back shifting mechanisms, two sets of front shifting mechanisms and two sets of back shifting mechanisms, wherein the plastic plate to be machined is fixed by the fixing device, the moving ends of the two sets of hydraulic telescopic arms are controlled to move in opposite directions, the outer side walls of the two sets of grinding heads are respectively contacted with the left side edge and the right side edge of the plastic plate, the two sets of first motors are respectively started to drive the two sets of rotating shafts to rotate, the two sets of grinding heads are driven to rotate, the edges of the plastic plate are ground smoothly, the two sets of front shifting mechanisms and the two sets of front shifting mechanisms are driven by the two sets of front shifting mechanisms, the two sets of hydraulic telescopic arms are driven to reciprocate back and forth, the two sets of front and back shifting mechanisms, the two sets of grinding heads are used for simultaneously and smooth machining the edges of the plastic plate, machining efficiency is improved, and the functionality of the device.

Preferably, the fixing device comprises an annular slide way, a rotary table, a gas tank, a plurality of groups of suckers, a first hose, a vacuum pump, a third shell, a connecting shaft and a second motor, the annular slide way is arranged at the top end of the base, the rotary table is rotatably arranged at the top end of the annular slide way, the bottom end of the gas tank is fixedly connected with the top end of the rotary table, the groups of suckers are all communicated and arranged at the top end of the gas tank, the input end of the first hose is communicated with the inside of the gas tank, the output end of the first hose is communicated with the input end of the vacuum pump, the vacuum pump is arranged on the inner side wall of the base, the top end of the third shell is connected with the top end of the inner side wall of the base, the top end of the connecting shaft penetrates through the top end of the base to be concentrically connected with the bottom end of the rotary table, the bottom end of the connecting shaft is rotatably arranged at the bottom end of the inner side wall of the third shell through a bearing, the second motor is arranged at the bottom end of the third shell, and the output end of the second motor is concentrically connected with the bottom end of the connecting shaft; place the multiunit sucking disc top with the plastic slab that needs processing, open the vacuum pump and breathe in to the gas tank through first hose, make the gas tank adsorb fixedly with the plastic slab through the multiunit sucking disc, thereby improve two sets of heads of polishing and add the plastic slab level and smooth man-hour, the position stability of plastic slab, after two sets of heads of polishing are accomplished with the wherein both sides smooth machining of plastic slab, mobile device drives two sets of second casings and keeps away from the removal each other, make two sets of heads of polishing and plastic slab separation, it is rotatory later through opening the second motor drive connecting axle, the connecting axle is rotatory to drive the carousel, it is rotatory to make the carousel drive the plastic slab through gas tank and multiunit sucking disc 90, thereby be convenient for two sets of heads of polishing to the smooth machining of other both sides, improve the operational convenience of smooth device to the different border smooth machining of plastic slab, the work efficiency of improvement device.

Preferably, the dust collector further comprises dust hoods, a collecting box, an air exhauster, an air filter screen and second hoses, wherein the two groups of dust hoods are respectively installed on the outer side walls of the two groups of second shells through brackets, the two groups of dust hoods are respectively arranged on the side parts of the two groups of polishing heads, the bottom end of the collecting box is installed at the top end of the first shell through a bracket, the rear end of the collecting box is provided with a pollution discharge sealing door, the left end and the right end of the collecting box are respectively communicated with an air inlet, the top end of the collecting box is provided with an air outlet, the air exhauster is installed at the top end of the collecting box, the input end of the air exhauster is communicated with the air outlet of the collecting box, the input ends of the two groups of second hoses are respectively communicated with the two groups of dust hoods, and the output ends of the two groups of second hoses are respectively communicated with the air inlets at the left end and the right end of the collecting box; when two sets of polishing heads add man-hour to the plastic slab border, through opening convulsions in the air exhauster to the collecting box, make the collecting box through two sets of second hoses convulsions in to two sets of suction hoods to make the plastics piece that produces in two sets of suction hoods will process collect, the piece of collection is carried to the collecting box in through the second hose and is stored, thereby improves the convenience that the processing piece was collected, reduces the pollution of piece to operational environment.

Preferably, the moving device comprises a screw, sliders and a third motor, a chute is arranged in the first shell, the left end and the right end of the screw are rotatably mounted on the inner side wall of the chute through bearings respectively, the third motor is mounted at the right end of the first shell, the output end of the third motor is concentrically connected with the right end of the screw, two groups of sliders are slidably arranged in the chute of the first shell respectively, the bottom ends of the two groups of sliders are connected with the top ends of the two groups of second shells respectively, opposite threads are arranged on the left outer side wall and the right outer side wall of the screw respectively, and the two groups of sliders are matched with and screwed on the left outer side wall and the right outer side wall of the screw respectively; the third motor is started to drive the lead screw to rotate, and the lead screw rotates to drive the two groups of sliding blocks to slide oppositely, so that the two groups of sliding blocks drive the two groups of polishing heads to move oppositely, and the convenience of the device for smoothly processing the edges of the plastic plates with different widths is improved.

Preferably, the hydraulic brake further comprises a hydraulic cylinder and an arc-shaped brake block, the fixed end of the hydraulic cylinder is installed on the outer side wall of the third shell, the arc-shaped brake block is installed on the moving end of the hydraulic cylinder, and the arc-shaped brake block is arranged on the side of the connecting shaft; promote the arc brake block through the pneumatic cylinder and remove, make arc brake block and connecting axle lateral wall contact to make the arc brake block with the rotatory braking of connecting axle, and then improve the fixed convenience of plastic slab rotation angle.

Preferably, the electromagnetic brake is arranged at the left end of the first shell and is concentrically connected with the left end of the lead screw; through setting up electromagnetic braking ware, improve the rotatory braking effect of lead screw, and then improve two sets of polishing head opposite direction's rigidity convenience.

Compared with the prior art, the beneficial effects of the utility model are that: the device comprises a fixing device, a first shell, two sets of hydraulic telescopic arms, a second shell, two sets of grinding heads, a moving device, a shifting mechanism, a front shifting mechanism, a back shifting mechanism, two sets of front shifting mechanisms, two sets of back shifting mechanisms, two sets of front shifting mechanisms, two sets of rear shifting mechanisms, two sets of back shifting mechanisms, two sets of front shifting mechanisms and two sets of back shifting mechanisms, wherein the plastic plate to be machined is fixed by the fixing device, the moving ends of the two sets of hydraulic telescopic arms are controlled to move in opposite directions, the outer side walls of the two sets of grinding heads are respectively contacted with the left side edge and the right side edge of the plastic plate, the two sets of first motors are respectively started to drive the two sets of rotating shafts to rotate, the two sets of grinding heads are driven to rotate, the edges of the plastic plate are ground smoothly, the two sets of front shifting mechanisms and the two sets of front shifting mechanisms are driven by the two sets of front shifting mechanisms, the two sets of hydraulic telescopic arms are driven to reciprocate back and forth, the two sets of front and back shifting mechanisms, the two sets of grinding heads are used for simultaneously and smooth machining the edges of the plastic plate, machining efficiency is improved, and the functionality of the device.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

fig. 2 is a partial structural view of the second housing in connection with a slider or the like;

FIG. 3 is a partial schematic view of the connection of the turntable with a gas tank or the like;

FIG. 4 is a schematic view of a part of the structure of the spindle connected to the polishing head;

in the drawings, the reference numbers: 1. a base; 2. a front-rear shifting mechanism; 3. a hydraulic telescopic arm; 4. a first housing; 5. a second housing; 6. a first motor; 7. a rotating shaft; 8. polishing head; 9. an annular chute; 10. a turntable; 11. an air box; 12. a suction cup; 13. a first hose; 14. a vacuum pump; 15. a third housing; 16. a connecting shaft; 17. a second motor; 18. a dust hood; 19. a collection box; 20. an exhaust fan; 21. an air filter screen; 22. a second hose; 23. a lead screw; 24. a slider; 25. a third motor; 26. a hydraulic cylinder; 27. an arc-shaped brake pad; 28. an electromagnetic brake.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. The invention may be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

Two groups of front and rear shifting mechanisms 2 are respectively arranged at the left and right parts of the top end of a base 1, the fixed ends of two groups of hydraulic telescopic arms 3 are respectively arranged at the output ends of the two groups of front and rear shifting mechanisms 2, the moving ends of the two groups of hydraulic telescopic arms 3 are connected with the bottom end of a first shell 4, two groups of first motors 6 are respectively arranged in two groups of second shells 5, the top ends of two groups of rotating shafts 7 are respectively rotatably arranged at the bottom ends of the two groups of second shells 5 through bearings, the output ends of the two groups of first motors 6 are respectively concentrically connected with the top ends of the two groups of rotating shafts 7, two groups of polishing heads 8 are respectively fixedly connected with the bottom ends of the two groups of rotating shafts 7, the two groups of polishing heads 8 are respectively arranged in a T shape, an annular slideway 9 is arranged at the top end of the base 1, a turntable 10 is rotatably arranged at the top end of the annular slideway 9, the bottom end of the air box 11 is fixedly connected with the top end of the turntable 10, and a plurality of suckers 12 are respectively communicated and arranged at the top end of the air box 11, the input end of a first hose 13 is communicated with the inside of the air box 11, the output end of the first hose 13 is communicated with the input end of a vacuum pump 14, the vacuum pump 14 is arranged on the inner side wall of the base 1, the top end of a third shell 15 is connected with the top part of the inner side wall of the base 1, the top end of a connecting shaft 16 passes through the top end of the base 1 and is concentrically connected with the bottom end of a rotary disc 10, the bottom end of the connecting shaft 16 is rotatably arranged at the bottom part of the inner side wall of the third shell 15 through a bearing, a second motor 17 is arranged at the bottom end of the third shell 15, the output end of the second motor 17 is concentrically connected with the bottom end of the connecting shaft 16, two groups of dust hoods 18 are respectively arranged on the outer side walls of two groups of second shells 5 through brackets, and two groups of dust hoods 18 are respectively arranged at the sides of two groups of polishing heads 8, the bottom end of a collecting box 19 is arranged at the top end of the first shell 4 through a bracket, the rear end of the collecting box 19 is provided with a pollution discharge closing door, and the left end and the right end of the collecting box 19 are respectively communicated with an air inlet, an exhaust port is formed in the top end of the collection box 19, an exhaust fan 20 is installed at the top end of the collection box 19, the input end of the exhaust fan 20 is communicated with the exhaust port of the collection box 19, an air filter screen 21 is communicated with the input end of the exhaust fan 20, the input ends of two groups of second hoses 22 are respectively communicated with two groups of dust hoods 18, the output ends of two groups of second hoses 22 are respectively communicated with air inlets at the left end and the right end of the collection box 19, a sliding groove is formed in the first shell 4, the left end and the right end of a lead screw 23 are respectively rotatably installed on the inner side wall of the sliding groove through a bearing, a third motor 25 is installed at the right end of the first shell 4, the output end of the third motor 25 is concentrically connected with the right end of the lead screw 23, two groups of sliders 24 are respectively slidably arranged in the sliding groove of the first shell 4, the bottom ends of the two groups of sliders 24 are respectively connected with the top ends of the two groups of the second shell 5, opposite threads are respectively arranged on the outer side walls of the left and the left side of the lead screw 23, the two groups of the sliders 24 are respectively matched and screwed on the outer side walls of the left side of the lead screw 23, an outer wall of the hydraulic cylinder 26, an arc brake 27 is installed on the moving end of the third shell 15, an electromagnetic brake 27 is installed on the connecting shaft 16, an electromagnetic brake 28 of the first shell 4, and a concentric end of the electromagnetic brake 23; firstly, a plastic plate to be processed is fixed in position through a fixing device, then the shrinkage length of a moving end of two groups of hydraulic telescopic arms 3 is controlled, a first shell 4 drives two groups of second shells 5 to move downwards, the second shells 5 drive two groups of polishing heads 8 to move downwards through two groups of rotating shafts 7, meanwhile, the two groups of second shells 5 are driven to move inwards in opposite directions through a moving device, therefore, the outer side walls of the two groups of polishing heads 8 are respectively contacted with the left side edge and the right side edge of the plastic plate, then, the two groups of first motors 6 are respectively driven to rotate through the two groups of rotating shafts 7, the two groups of rotating shafts 7 drive the two groups of polishing heads 8 to rotate, after the two groups of polishing heads 8 rotate, the edges of the plastic plate are polished and smoothly processed, the two groups of hydraulic telescopic arms 3 are driven to reciprocate back and forth through the two groups of front and back shifting mechanisms 2, the two groups of polishing heads 8 are made to move back and forth to integrally and forth, the two sides of the plastic plate are simultaneously and smoothly processed by the device, the processing efficiency of the two groups of polishing heads 8 is improved, and the two groups of the plastic plates are arranged into a T shape, and the two groups of polishing heads 8 are simultaneously smooth processing the plastic plate, and the functional device is improved.

As shown in figures 1 to 4, the hard plastic edge smoothing device of the present invention, when in operation, firstly, a plastic plate to be processed is placed on top of a plurality of sets of suckers 12, a vacuum pump 14 is turned on to suck air into an air box 11 through a first hose 13, the air box 11 is made to adsorb and fix the plastic plate through the plurality of sets of suckers 12, then, by controlling the length of the moving end contraction of two sets of hydraulic telescopic arms 3, the first housing 4 is made to drive two sets of second housings 5 to move downwards, the second housing 5 is made to drive two sets of polishing heads 8 to move downwards through two sets of rotating shafts 7, and simultaneously, by controlling the moving device to drive two sets of second housings 5 to move inwards and oppositely, thereby, the outer side walls of the two sets of polishing heads 8 are respectively contacted with the left and right side edges of the plastic plate, and then, by turning on two sets of first motors 6, the two sets of rotating shafts 7 are respectively driven to rotate, make two sets of pivots 7 drive two sets of head 8 rotations, make two sets of 8 rotatory back of head of polishing polish the level and smooth processing with the plastic slab border, drive two sets of hydraulic stretching arm 3 reciprocating motion front and back through two sets of front and back shift mechanism 2, make two sets of 8 back-and-forth movement of head of polishing with the whole level and smooth processing in plastic slab border, then after two sets of 8 smooth processing in wherein both sides of head of polishing with the plastic slab accomplish, mobile device drives two sets of second casings 5 and keeps away from the removal each other, make two sets of 8 and plastic slab separation of head of polishing, later drive connecting axle 16 rotation through opening second motor 17, the connecting axle 16 rotation drives the carousel 10 rotation, it is rotatory 90 to make carousel 10 drive the plastic slab through gas tank 11 and multiunit sucking disc 12, thereby be convenient for two sets of 8 head of polishing to the level and smooth processing in both sides in addition.

The utility model discloses the main function who realizes does: firstly, the plastic plate to be processed is fixed in position through a fixing device, then the contraction length of the moving end of two sets of hydraulic telescopic arms 3 is controlled, the first shell 4 drives two sets of second shells 5 to move downwards, the second shells 5 drive two sets of polishing heads 8 to move downwards through two sets of rotating shafts 7, meanwhile, the two sets of second shells 5 are driven to move inwards in opposite directions through a moving device, therefore, the outer side walls of the two sets of polishing heads 8 are respectively contacted with the edges of the left side and the right side of the plastic plate, then, the two sets of first motors 6 are respectively driven to rotate the two sets of rotating shafts 7, the two sets of rotating shafts 7 drive the two sets of polishing heads 8 to rotate, after the two sets of polishing heads 8 rotate, the edges of the plastic plate are polished and smoothly processed, the two sets of hydraulic telescopic arms 3 are driven to reciprocate back and forth through the two sets of front and back shifting mechanisms 2, so that the two sets of polishing heads 8 move back and forth to integrally and forth the edges of the plastic plate, the effect of simultaneously and smoothly process the two sides of the plastic plate is improved, the device, the processing efficiency of the two sets of the plastic plate is improved, and the two sets of polishing heads 8 are simultaneously, the plastic plate can simultaneously and the plastic plate can be polished smoothly, and the functionality of the device is improved.

The mounting mode, the connecting mode or the setting mode of the hard plastic edge smoothing device of the utility model are common mechanical modes, and the hard plastic edge smoothing device can be implemented as long as the beneficial effects can be achieved; the utility model discloses a rigid plastic border smoothing device's front and back aversion mechanism 2, the flexible arm 3 of hydraulic pressure, first motor 6, vacuum pump 14, second motor 17, air exhauster 20, airstrainer 21, third motor 25, pneumatic cylinder 26, arc brake block 27 and electromagnetic braking ware 28 are purchase on the market, and this industry technical staff only need according to its subsidiary service instruction install and operate can, and need not the technical staff in this field and pay out the creative work.

All technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims (6)

1. A hard plastic edge smoothing device is characterized by comprising a base (1), a fixing device, two groups of front and back shifting mechanisms (2), two groups of hydraulic telescopic arms (3) and a first shell (4), the mobile device, two sets of second casing (5), two sets of first motor (6), two sets of pivot (7) and two sets of bistrique (8) of polishing, base (1) top middle part is provided with fixing device, fixing device is used for fixing the plastic slab, two sets of front and back shifting mechanism (2) are installed respectively in base (1) top left and right sides two, the stiff end of two sets of hydraulic telescopic arm (3) is installed respectively on two sets of front and back shifting mechanism (2) output, the removal end of two sets of hydraulic telescopic arm (3) all is connected with first casing (4) bottom, be provided with the mobile device on first casing (4), two sets of second casing (5) tops all are connected with the mobile device, the mobile device is used for driving two sets of second casing (5) opposite direction removal, two sets of first motor (6) are installed respectively inside two sets of second casing (5), two sets of pivot (7) tops are installed respectively through the bearing rotation in two sets of second casing (5) bottoms, first motor (6) output is connected with two sets of pivot (7) tops with one heart respectively, two sets of polishing head (8) bottoms are set up to two sets of fixed connection as two sets of pivot (8) respectively and "T shape bistrique" respectively.

2. A rigid plastic rim smoothing device as claimed in claim 1, wherein the fixing device comprises an annular slide (9), a rotary table (10), an air box (11), a plurality of groups of suckers (12), a first hose (13), a vacuum pump (14), a third housing (15), a connecting shaft (16) and a second motor (17), the annular slide (9) is installed on the top end of the base (1), the rotary table (10) is rotatably installed on the top end of the annular slide (9), the bottom end of the air box (11) is fixedly connected with the top end of the rotary table (10), the groups of suckers (12) are all communicated and arranged on the top end of the air box (11), the input end of the first hose (13) is communicated with the inside of the air box (11), the output end of the first hose (13) is communicated with the input end of the vacuum pump (14), the vacuum pump (14) is installed on the inside wall of the base (1), the top end of the third housing (15) is connected with the top end of the base (1), the top end of the connecting shaft (16) passes through the top end of the base (1) to be concentrically connected with the bottom end of the rotary table (10), the connecting shaft (16) is rotatably installed on the bottom end of the third housing (15), the inside wall of the second housing (17), and the second housing (17) is connected with the motor (17).

3. The hard plastic edge smoothing device according to claim 1, further comprising a dust hood (18), a collection box (19), an exhaust fan (20), an air filter (21) and a second hose (22), wherein the two sets of dust hoods (18) are respectively mounted on the outer side walls of the two sets of second shells (5) through brackets, the two sets of dust hoods (18) are respectively arranged on the lateral sides of the two sets of sanding heads (8), the bottom end of the collection box (19) is mounted on the top end of the first shell (4) through a bracket, the rear end of the collection box (19) is provided with a pollution discharge closing door, the left end and the right end of the collection box (19) are respectively communicated with an air inlet, the top end of the collection box (19) is provided with an air outlet, the exhaust fan (20) is mounted on the top end of the collection box (19), the input end of the exhaust fan (20) is communicated with the air outlet of the collection box (19), the air filter (21) is communicated with the input end of the exhaust fan (20), the input ends of the two sets of the second hose (22) are respectively communicated with the dust hoods (18), and the output ends of the collection box (19) are respectively communicated with the left end and the left end of the collection box (19).

4. The hard plastic edge smoothing device according to claim 1, wherein the moving device comprises a screw (23), sliders (24) and a third motor (25), a chute is arranged in the first housing (4), the left and right ends of the screw (23) are rotatably mounted on the inner side wall of the chute through bearings, respectively, the third motor (25) is mounted at the right end of the first housing (4), the output end of the third motor (25) is concentrically connected with the right end of the screw (23), two sets of sliders (24) are slidably disposed in the chute of the first housing (4), the bottom ends of the two sets of sliders (24) are connected with the top ends of the two sets of second housings (5), the left and right outer side walls of the screw (23) are provided with opposite threads, and the two sets of sliders (24) are respectively matched and screwed on the left and right outer side walls of the screw (23).

5. A rigid plastic rim smoothing device as defined in claim 2, further comprising a hydraulic cylinder (26) and an arc brake pad (27), wherein a fixed end of the hydraulic cylinder (26) is mounted on an outer side wall of the third housing (15), the arc brake pad (27) is mounted on a moving end of the hydraulic cylinder (26), and the arc brake pad (27) is disposed at a side of the connecting shaft (16).

6. A hard plastic rim smoothing device as defined in claim 4, further comprising an electromagnetic brake (28), wherein the electromagnetic brake (28) is mounted on the left end of the first housing (4), and the electromagnetic brake (28) is concentrically connected to the left end of the screw (23).

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