CN118144175A - Automatic cutting device and method for tray excess materials - Google Patents

Abstract

The utility model provides a tray clout automatic cutout device and method, includes the support, and the top of support is provided with cutting device, and the below of support is provided with the remolding device that can go up and down, cutting device includes first lift seat, and the fillet cutting knife is installed respectively to four angles of first lift seat, and the interior circular arc blade of fillet cutting knife matches with four fillets of tray, installs first conveyor around the first lift seat, installs the side cutting knife respectively on four sides that lie in the tray on the first conveyor, and first conveyor drives side cutting knife along tray side linear reciprocating motion, and remolding device includes the second lift seat, installs annular conveyor on the second lift seat, installs surface treatment device on the annular conveyor. The cutting device can cut off the residual materials conveniently and rapidly, and the surface trace is remolded through the remolding device, so that the processing cost of enterprises is reduced, the production efficiency is improved, and the product quality is improved.

Description

Automatic cutting device and method for tray excess materials

Technical Field

The invention relates to the technical field of tray processing equipment, in particular to an automatic cutting device and method for tray excess materials.

Background

The flat plastic tray is called according to the shape of the surface of the tray, and has wide application in various industries such as medicine, convenience food, paper making, flour and the like. In the current processing method, referring to fig. 4, when the tray 400 is formed, the base 401 and the top plate 402 are formed by hot melting, and during the forming process, the remainder 403 is extruded from the joint between the base 401 and the top plate 402.

The remainder is mainly cut manually at present, so that the cutting labor is increased, the processing standardization is not good, the production efficiency is low, and the production cost is high. And after the surplus material is manually cut off, cutting marks are formed around the tray 400, which affect the quality of the product.

Disclosure of Invention

The invention aims to solve the technical problems that: solves the problems existing in the prior art, and provides a device and a method for automatically cutting off the excess material of a tray, which can conveniently and rapidly cut off the excess material through a cutting device, remodel the surface trace through a remolding device, reduce the processing cost of enterprises, improve the production efficiency and improve the product quality.

In order to solve the technical problems, the invention adopts the following technical scheme: the utility model provides a tray clout automatic cutout device, includes the support, is used for the location to place the tray of waiting to handle on the support, and the top of support is provided with cutting device, and the below of support is provided with remolding device, cutting device includes first elevating socket, and the fillet cutting knife is installed respectively to four angles of first elevating socket, and the interior circular arc blade of fillet cutting knife matches with four fillets of tray, installs first conveyor around the first elevating socket, installs the side cutting knife respectively on four sides that lie in the tray on the first conveyor, and first conveyor drives side cutting knife along tray side linear reciprocating motion, remolding device includes the second elevating socket, installs annular conveyor on the second elevating socket, installs surface treatment device on the annular conveyor, and surface treatment device is used for handling the scratch after the cutting.

The support comprises a supporting plate, a positioning supporting plate is arranged on the upper side of the supporting plate, positioning stop blocks are arranged at two ends of the positioning supporting plate and on the supporting plate, and the four positioning stop blocks are used for positioning the tray.

A plurality of first lifting devices are arranged on the upper side of the first lifting seat, and the first lifting seat is driven to move up and down through the expansion and contraction of the first lifting devices.

The fillet cutting knife is connected and fixed with the first lifting seat through the first connecting rod, and the fillet cutting knife is positioned below the side cutting knife.

The first conveying device comprises linear guide rail systems which are respectively arranged on four sides of the upper side of the first lifting seat and a first synchronous belt system which is arranged on the inner side of the linear guide rail systems, the linear guide rail systems comprise linear guide rails and linear sliding blocks which are arranged on the linear guide rails in a sliding guiding manner, and side cutting knives are arranged on the linear sliding blocks; the first lifting seat is provided with mounting seats at four corners, the first synchronous belt system comprises a first synchronous wheel, a first synchronous belt and a first driver, the four first synchronous wheels are respectively and rotatably arranged at the lower sides of the four mounting seats, the first synchronous belt is sleeved on the four first synchronous wheels, at least one mounting seat is provided with the first driver, an output shaft of the first driver is in transmission connection with the first synchronous wheel, and four linear sliding blocks positioned on four sides are respectively connected and fixed with the first synchronous belt; the first driver rotates positively and negatively so as to drive the side cutting knife to reciprocate linearly along the side edge of the tray, and when the cutting edge of the side cutting knife moves forwards, the excess material on the side edge of the tray is cut off.

The side cutting knife is fixedly connected with the linear sliding block through a second connecting rod.

And a plurality of second lifting devices are arranged on the lower side of the second lifting seat, and the second lifting seat is driven to move up and down by stretching and retracting the second lifting devices.

The annular conveying device comprises an annular guide rail and a second synchronous belt system, the annular guide rail is arranged on the upper side edge of a second lifting seat, the second synchronous belt system comprises a second synchronous wheel, a second synchronous belt and a second driver, the second lifting seat is respectively rotatably provided with the second synchronous wheel at four corners positioned at the inner side of the annular guide rail, the second synchronous belt is sleeved on the four second synchronous wheels, and the second driver is in transmission connection with one of the second synchronous wheels, or the second driver is provided with a third synchronous wheel on an output shaft and in transmission connection with the second synchronous belt; the annular guide rail is provided with a sliding block matched with the annular guide rail, the sliding block is connected with a second synchronous belt, the sliding block is provided with a connecting seat, and the surface treatment device is arranged on the connecting seat.

The second lifting seat is further provided with an overturning positioning mechanism, the overturning positioning mechanism comprises a sliding seat, a positioning seat, a swinging rod and an air cylinder, the sliding seat is arranged on the annular guide rail, one side of the sliding seat is fixedly connected with the second synchronous belt, the positioning seat is arranged on the other side of the sliding seat, a rotating shaft is fixedly arranged in the middle of the swinging rod, two ends of the rotating shaft are respectively connected with the second lifting seat through lugs, the rotating shaft is further provided with a supporting arm, one end of the air cylinder is hinged with the second lifting seat, the other end of the air cylinder is hinged with the supporting arm, the upper end of the swinging rod is provided with a limiting part, the positioning seat is provided with a limiting groove on one side of the limiting part, inclined planes are respectively arranged on two sides of the limiting groove, and when the positioning seat rotates, the limiting part of the swinging rod enters the limiting groove to be limited through the inclined planes.

The automatic cutting method for the tray excess material adopts the automatic cutting device for the tray excess material, and the cutting method comprises the following steps:

s1, placing a tray to be processed into a support for positioning;

s2, the first lifting seat of the cutting device descends, so that the round corner cutting knives at four corners are driven to descend to cut off the residual materials at four round corners of the tray, the first lifting seat stops descending, at the moment, the four side cutting knives at four sides are respectively attached to four sides of the tray, and the cutting edges of the side cutting knives face the residual materials at the sides of the tray; when the side cutting knife faces the remainder on the side of the tray, the initial position of the side cutting knife is positioned at the round corner cutting knife on one side;

s3, starting the first conveying device, driving the side cutting knives positioned on the four sides of the tray to move to the round corner cutting knives positioned on the other side, and cutting off the residual materials on the four sides of the tray by the cutting edges of the side cutting knives in the moving process;

S4, after the side cutting knife moves to the round corner cutting knife on the other side, stopping the first conveying device, finishing cutting, lifting the first lifting seat, reversely starting the first conveying device, and then driving the side cutting knife to return to the initial position;

s5, a second lifting seat of the remolding device is lifted, so that the surface treatment device is driven to lift, and a nozzle of the surface treatment device faces to a cutting position of the residual materials;

s6, starting the annular conveying device, starting the surface treatment device, driving the surface treatment device to rotate along the tray for one circle, and carrying out surface remolding treatment on scratches, burrs and film closing lines after cutting of the residual materials;

S7, after the surface remodeling treatment is finished, the surface treatment device is closed, the annular conveying device is stopped, and the second lifting seat is lowered to the initial position;

s8, taking out the cut and processed tray from the support.

The invention has the following beneficial effects:

1. The round angle cutter is used for cutting the excess materials at the four round angles of the tray from top to bottom, and the side edge cutters at the front side, the back side, the left side and the right side respectively cut the excess materials at the four sides of the tray from four directions at the same time, so that the processing cost of enterprises is reduced, and the production efficiency is improved. After the surplus materials are processed through the round corner cutting knife and the side edge cutting knife, the cutting edges can be whitened, burrs, scratches and the like, so that the whitened, burrs and scratches after cutting are processed through the surface treatment device, and the product quality is improved.

2. The round angle cutter is connected and fixed with the first lifting seat through the first connecting rod, and the round angle cutter is positioned below the side angle cutter, so that the round angle cutter can cut the round angle residual materials firstly, when the side angle cutter is aligned with the side edge residual materials, the round angle cutter is positioned below the residual materials, thereby providing a larger space for the movement of the side angle cutter, the two cutters can respectively operate and cut without mutual interference, the control precision of the side angle cutter is reduced, and the cutting paths of the round angle cutter and the round angle cutter can be overlapped, so that the round angle cutter can be completely cut.

3. The second lifting seat is also provided with a turnover positioning mechanism for positioning the surface treatment device around one rotation. Therefore, the control is simpler, a servo motor with higher manufacturing cost is not needed, and the control of the second synchronous belt system is changed into the control of the air cylinder.

Drawings

The invention is further illustrated by the following examples in conjunction with the accompanying drawings:

fig. 1 is a schematic diagram of a front view structure of the present invention.

Fig. 2 is a schematic perspective view of the present invention.

Fig. 3 is a schematic perspective view of the support of the present invention.

Fig. 4 is a schematic perspective view of a tray placed on the support of the present invention.

Fig. 5 is a schematic perspective view of a cutting device according to the present invention.

Fig. 6 is a schematic diagram of a front view of a cutting device according to the present invention.

FIG. 7 is a schematic perspective view of a remodeling device according to the present invention.

Fig. 8 is a schematic perspective view of the overturning and positioning mechanism at a in fig. 7.

Fig. 9 is a schematic view showing the working states of the fillet cutter and the side cutter according to the present invention.

In the figure, a support 100, a supporting plate 101, a positioning supporting plate 102 and a positioning stop block 103;

The cutting device 200, the first elevating base 210, the fillet cutting knife 220, the first connecting rod 221,

The first conveyor 230, the first synchronizing wheel 231, the first synchronizing belt 232, the first driver 233, the linear guide 234, the linear slider 235, the side cutter 240, the second connecting rod 241, the first elevating device 250;

The device comprises a reshaping device 300, a second lifting seat 310, an annular conveying device 320, an annular guide rail 321, a connecting seat 330, a surface treatment device 340, a second synchronous belt system 350, a second synchronous wheel 351, a second synchronous belt 352, a second driver 353, a second lifting device 360, a turnover positioning mechanism 370, a sliding seat 371, a positioning seat 372, a limiting groove 373, a rotating shaft 374, a swinging rod 375, a limiting part 376, an ear seat 377, a supporting arm 378 and a cylinder 379;

tray 400, base 401, top plate 402, remainder 403.

Detailed Description

Embodiment one:

Referring to fig. 1-9, an automatic cutting device for tray excess materials comprises a support 100, a tray 400 to be processed is positioned and placed on the support 100, a cutting device 200 is arranged above the support 100, a remolding device 300 capable of lifting is arranged below the support 100, the cutting device 200 comprises a first lifting seat 210, four corners of the first lifting seat 210 are respectively provided with a round angle cutting knife 220, the inner circular arc cutting edges of the round angle cutting knives 220 are matched with four round angles of the tray 400, the periphery of the first lifting seat 210 is provided with a first conveying device 230, the four sides of the tray 400 on the first conveying device 230 are respectively provided with a side cutting knife 240, the first conveying device 230 drives the side cutting knives 240 to reciprocate linearly along the sides of the tray 400, the remolding device 300 comprises a second lifting seat 310, the second lifting seat 310 is provided with an annular conveying device 320, the annular conveying device 320 is provided with a surface treatment device 340, and the surface treatment device 340 is used for treating scratches after cutting.

The fillet cutting knife 220 is used for cutting the excess materials 403 at the four fillets of the tray 400 from top to bottom, and the side cutting knives 240 at the front, back, left and right sides cut the excess materials 403 at the four sides of the tray 400 from four directions at the same time, so that the processing cost of enterprises is reduced and the production efficiency is improved. After the surplus material 403 is processed by the fillet cutter 220 and the side cutter 240, the cut edge may be whitened, burred, scratched, etc., so that after the cutting device 200 finishes cutting, the first lifting seat 210 is lifted, and then the second lifting seat 310 is lifted, and the annular conveying device 320 drives the surface treatment device 340 to treat the whitened, burred and scratched cut, so as to improve the product quality.

Preferably, the surface treatment device 340 employs a thermal shrinkage flame thrower, and the fuel is ethane or liquefied gas. The surface treatment device 340 may also employ a plasma spray head, such as a plasma spray head of a direct-injection plasma apparatus of type P-100A.

The surface treatment device 340 melts the scratches, burrs, and the film-bonding lines by high temperature, changes the sharp scratches, burrs, and the film-bonding lines into relatively soft edges, and simultaneously restores the primary color from whitening.

Referring to fig. 3, the support 100 includes a pallet 101, a positioning pallet 102 is provided on an upper side of the pallet 101, positioning stoppers 103 are provided on both ends of the positioning pallet 102, and the pallet 101 positions a tray 400 by the positioning stoppers 103 on four sides.

Referring to fig. 5, in the present embodiment, a plurality of first elevating devices 250 are installed at the upper side of the first elevating base 210, and the first elevating base 210 is driven to move up and down by the first elevating devices 250 being extended and contracted. The first lifting device 250 may be a hydraulic cylinder, a cylinder, or a worm gear lifter. In use, a frame is disposed above the first lifting seat 210, the upper end of the first lifting device 250 is fixedly connected with the frame, and the lower end is connected with the first lifting seat 210.

The fillet cutter 220 may be longitudinal, see fig. 9, when the side cutter 240 cuts, the travel path of the side cutter 240 needs to be very precise due to the blocking of the fillet cutter 220, otherwise the side cutter 240 may collide with the fillet cutter 220 or may not be completely cut. Therefore, referring to fig. 5 and 6, in the present embodiment, the fillet cutter 220 is connected and fixed with the first lifting seat 210 through the first connecting rod 221, and the fillet cutter 220 is located below the side cutter 240, referring to fig. 6, so that the fillet cutter 220 can cut the remainder of the fillet first, when the side cutter 240 aligns with the remainder of the side, the fillet cutter 220 is located below the remainder, thereby providing a larger space for the movement of the side cutter 240, reducing the control precision of the side cutter 240, and overlapping the cutting path of the fillet cutter 220, so as to completely cut.

Referring to fig. 7, the first conveying device 230 includes linear guide rail systems respectively installed at four sides of an upper side of the first elevating seat 210, and a first timing belt system located at an inner side of the linear guide rail systems, the linear guide rail systems including linear guide rails 234 and linear sliders 235 slidably guiding the linear guide rails 234, and side cutters 240 are installed on the linear sliders 235; the first lifting seat 210 is provided with mounting seats 211 at four corners, the first synchronous belt system comprises a first synchronous wheel 231, a first synchronous belt 232 and a first driver 233, the four first synchronous wheels 231 are respectively and rotatably mounted at the lower sides of the four mounting seats 211, the first synchronous belt 232 is sleeved on the four first synchronous wheels 231, at least one mounting seat 211 is provided with a first driver 233, an output shaft of the first driver 233 is in transmission connection with the first synchronous wheel 231, and four linear sliding blocks 235 positioned on four sides are respectively and fixedly connected with the first synchronous belt 232; the first driver 233 rotates forward and backward, thereby driving the side cutter 240 to reciprocate linearly along the side of the tray 400, and cutting off the excess material 403 on the side of the tray 400 when the cutting edge of the side cutter 240 moves forward. By the above structure, the linear reciprocating motion of the side cutter 240 is achieved.

The first conveying device 230 can realize the linear reciprocating motion of the side cutting knife 240 by adopting the structure, four linear modules can be respectively installed on four sides of the first lifting seat 210, and the side cutting knife 240 is installed on a sliding block of the linear modules, so that the linear reciprocating motion can be realized.

Preferably, the first driver 233 is a servo motor or a stepping motor.

Further, referring to fig. 5, the side cutter 240 is fixedly connected to the linear slider 235 through a second connecting rod 241. Thereby can convenient design adjustment side cutting knife 240's mounted position through setting up the second connecting rod 241.

Referring to fig. 7, a plurality of second elevating means 360 are installed at the lower side of the second elevating seat 310, and extend and retract by the second elevating means 360, thereby driving the second elevating seat 310 to move up and down. The second lifting device 360 may be a hydraulic cylinder, a cylinder, or a worm gear lifter. When in use, a frame is arranged below the second lifting device 360, the lower end of the second lifting device 360 is fixedly connected with the frame, and the upper end is connected with the second lifting seat 310.

Referring to fig. 7, the endless conveyor 320 includes an endless guide rail 321 and a second timing belt system 350, the endless guide rail 321 is installed at an upper side edge of the second elevating seat 310, the second timing belt system 350 includes a second timing wheel 351, a second timing belt 352, and a second driver 353, the second elevating seat 310 is rotatably installed with the second timing wheel 351 at four corners inside the endless guide rail 321, the second timing belt 352 is sleeved on the four second timing wheels 351, the second driver 353 is in transmission connection with one of the second timing wheels 351, or the second driver 353 is installed with a third timing wheel 354 on an output shaft in transmission connection with the second timing belt 352; the annular guide rail 321 is provided with a slider adapted to the annular guide rail 321, the slider is connected with a second synchronous belt 352, the slider is provided with a connecting seat 330, and the surface treatment device 340 is arranged on the connecting seat 330. By the above-described structure, the rotation of the surface treating device 340 around the tray 400 is achieved.

Preferably, the second driver 353 is a servo motor or a stepping motor. The second driver 353 rotates to drive the second timing belt 352 to rotate, thereby driving the connection seat 330 to move along the circular guide 321.

Further, in order to position the surface treating device 340 at a position corresponding to one rotation, referring to fig. 8, a flipping and positioning mechanism 370 is further mounted on the second lifting base 310. The turnover positioning mechanism 370 comprises a sliding seat 371, a positioning seat 372, a swinging rod 375 and an air cylinder 379, wherein the sliding seat 371 is arranged on the annular guide rail 321, one side of the sliding seat 371 is fixedly connected with the second synchronous belt 352, the positioning seat 372 is arranged on the other side of the sliding seat 371, a rotating shaft 374 is fixedly arranged in the middle of the swinging rod 375, two ends of the rotating shaft 374 are respectively connected with the second lifting seat 310 through lugs 377, a supporting arm 378 is further arranged on the rotating shaft 374, one end of the air cylinder 379 is hinged with the second lifting seat 310, the other end of the air cylinder 379 is hinged with the supporting arm 378, a limiting part 376 is arranged at the upper end of the swinging rod 375, a limiting groove 373 is formed in one side of the limiting part 376, inclined planes are respectively arranged on two sides of the limiting groove 373, and when the positioning seat 372 rotates, the limiting part 376 of the swinging rod 375 enters the limiting groove 373 to be limited through the inclined planes. With the above-described structure, the surface treatment device 340 is positioned to rotate around one rotation. Thus, the control is simpler, and a servo motor with higher manufacturing cost is not needed. In this embodiment, in particular, when the second driver 353 is used, the motor and the third synchronizing wheel 354 are driven by a common motor through a friction plate coupling, in fig. 8, when the sliding seat 371 moves with the positioning seat 372, the two side inclined planes of the limiting groove 373 on the positioning seat 372 push out the limiting portion 376 of the swing rod 375, when the limiting groove 373 is aligned with the limiting portion 376, the limiting portion 376 is sprung into the limiting groove 373 under the action of air pressure of the air cylinder 379, and at this time, the sliding seat 371 stops rotating, so that the surface treatment device 340 also stops rotating. When the cylinder 379 is operated next time, the piston rod is retracted, the stopper 376 swings outwardly to be separated from the stopper 373, the sliding seat 371 is again rotated, and the surface treating device 340 is rotated again, thus circulating. So that control of the second timing belt system 350 becomes control of the cylinder 379. In this process, the air pressure in the air cylinder 379 cannot be too high, or the positioning seat 372 cannot push the limiting portion 376 open, and the function cannot be realized.

Embodiment two:

Referring to fig. 1-9, an automatic cutting method for tray remnants, which adopts the automatic cutting device for tray remnants, comprises the following steps:

s1, placing the tray 400 to be processed into the support 100 for positioning.

S2, the first lifting seat 210 of the cutting device 200 descends, so that the round corner cutting knives 220 at four corners are driven to descend to cut off the excess materials 403 at the four round corners of the tray 400, after the round corner cutting knives descend to a certain height, the first lifting seat 210 stops descending, at this time, the four side cutting knives 240 at four sides are respectively attached to the four sides of the tray 400, and the cutting edges of the side cutting knives 240 face the excess materials 403 at the side of the tray 400; wherein, when the side cutter 240 faces the remainder 403 on the side of the tray 400, the initial position of the side cutter 240 is at the fillet cutter 220 on one side.

S3, the first conveying device 230 is started, referring to fig. 9, the side cutting blades 240 on the four sides of the tray 400 are driven to move toward the fillet cutting blades 220 on the other side, and during the moving process, the cutting edges of the side cutting blades 240 cut off the excess materials 403 on the four sides of the tray 400. The side cutter 240 shown in phantom is in the end position.

S4, after the side cutter 240 moves to the fillet cutter 220 on the other side, the first conveying device 230 stops, the first lifting seat 210 is lifted, the first conveying device 230 is reversely started, and then the side cutter 240 is driven to return to the initial position.

S5, the second lifting seat 310 of the remolding device 300 is lifted, so that the surface treatment device 340 is driven to lift, and the nozzle of the surface treatment device 340 faces the cutting position of the residual materials.

S6, starting the annular conveying device 320, starting the surface treatment device 340, driving the surface treatment device 340 to rotate along the tray 400 for one circle, and performing surface remolding treatment on scratches, burrs and film closing lines after cutting the residual materials 403.

S7, after the surface remodeling treatment is completed, the surface treatment device 340 is closed, the annular conveying device 320 is stopped, the second lifting seat 310 is lowered back to the initial position,

S8, taking out the cut and processed tray 400 from the support 100.

Claims (10)

1. The utility model provides a tray clout automatic cutout device which characterized in that: including support (100), be used for the location to place tray (400) of waiting to handle on support (100), the top of support (100) is provided with cutting device (200), the below of support (100) is provided with remolding device (300), cutting device (200) are including first elevating socket (210), fillet cutting knife (220) are installed respectively in four angles of first elevating socket (210), the interior circular arc blade of fillet cutting knife (220) matches with four fillets of tray (400), first conveyor (230) are installed around first elevating socket (210), side cutting knife (240) are installed respectively at four sides that are located tray (400) on first conveyor (230), first conveyor (230) drive side cutting knife (240) are along tray (400) side rectilinear reciprocating motion, remolding device (300) are including second elevating socket (310), install annular conveyor (320) on second elevating socket (310), install surface treatment device (340) on annular conveyor (320), surface treatment device (340) are used for carrying out the scratch after the scratch to the scratch of cutting.

2. The automatic tray remainder cutting device according to claim 1, wherein: the support (100) comprises a supporting plate (101), a positioning supporting plate (102) is arranged on the upper side of the supporting plate (101), positioning stop blocks (103) are arranged at two ends of the positioning supporting plate (102) and on the supporting plate (101), and the four-side positioning stop blocks (103) are used for positioning the tray (400).

3. The automatic tray remainder cutting device according to claim 1, wherein: a plurality of first lifting devices (250) are arranged on the upper side of the first lifting seat (210), and the first lifting seat (210) is driven to move up and down through the expansion and contraction of the first lifting devices (250).

4. The automatic tray remainder cutting device according to claim 1, wherein: the fillet cutting knife (220) is fixedly connected with the first lifting seat (210) through the first connecting rod (221), and the fillet cutting knife (220) is positioned below the side cutting knife (240).

5. The automatic tray remainder cutting device according to claim 1, wherein: the first conveying device (230) comprises linear guide rail systems which are respectively arranged on four sides of the upper side of the first lifting seat (210), and a first synchronous belt system which is arranged on the inner side of the linear guide rail systems, wherein the linear guide rail systems comprise linear guide rails (234) and linear sliding blocks (235) which are arranged on the linear guide rails (234) in a sliding guiding manner, and side cutting knives (240) are arranged on the linear sliding blocks (235); the first lifting seat (210) is provided with mounting seats (211) at four corners, the first synchronous belt system comprises first synchronous wheels (231), first synchronous belts (232) and first drivers (233), the four first synchronous wheels (231) are respectively and rotatably mounted on the lower sides of the four mounting seats (211), the first synchronous belts (232) are sleeved on the four first synchronous wheels (231), at least one mounting seat (211) is provided with the first drivers (233), an output shaft of each first driver (233) is in transmission connection with each first synchronous wheel (231), and four linear sliding blocks (235) on four sides are respectively connected and fixed with the first synchronous belts (232); the first driver (233) rotates positively and negatively, so that the side cutter (240) is driven to reciprocate linearly along the side of the tray (400), and when the cutting edge of the side cutter (240) moves forwards, the excess material (403) on the side of the tray (400) is cut off.

6. The automatic tray remainder cutting device according to claim 1 or 5, wherein: the side cutting knife (240) is fixedly connected with the linear slide block (235) through a second connecting rod (241).

7. The automatic tray remainder cutting device according to claim 1, wherein: a plurality of second lifting devices (360) are arranged on the lower side of the second lifting seat (310), and the second lifting seat (310) is driven to move up and down by the expansion and contraction of the second lifting devices (360).

8. The automatic tray remainder cutting device according to claim 1, wherein: the annular conveying device (320) comprises an annular guide rail (321) and a second synchronous belt system (350), the annular guide rail (321) is arranged at the upper side edge of the second lifting seat (310), the second synchronous belt system (350) comprises a second synchronous wheel (351), a second synchronous belt (352) and a second driver (353), the second lifting seat (310) is respectively rotatably provided with the second synchronous wheel (351) at four corners positioned at the inner side of the annular guide rail (321), the second synchronous belt (352) is sleeved on the four second synchronous wheels (351), and the second driver (353) is in transmission connection with one of the second synchronous wheels (351), or the second driver (353) is provided with a third synchronous wheel (354) on an output shaft and is in transmission connection with the second synchronous belt (352); the annular guide rail (321) is provided with a sliding block matched with the annular guide rail (321), the sliding block is connected with a second synchronous belt (352), the sliding block is provided with a connecting seat (330), and the surface treatment device (340) is arranged on the connecting seat (330).

9. The automatic pallet residue cutting device according to claim 8, wherein: the utility model discloses a lifting device for a vehicle, including a first lifting seat (310), a second lifting seat (310) and a positioning mechanism (370), the second lifting seat (310) is connected with the first lifting seat, the second lifting seat (310) is connected with the second lifting seat (37), turnover positioning mechanism (370) is still installed, turnover positioning mechanism (370) includes sliding seat (371), positioning seat (372), pendulum rod (375) and cylinder (379), sliding seat (371) are installed on annular guide rail (321), sliding seat (371) one side is connected fixedly with second hold-in range (352), positioning seat (372) are installed to the opposite side, middle part fixed mounting of pendulum rod (375) has pivot (374), pivot (374) both ends are connected with second lifting seat (310) through ear seat (377) respectively, still install support arm (378) on pivot (374), cylinder (379) one end is articulated with second lifting seat (310), the other end is articulated with support arm (378), the upper end of pendulum rod (375) is provided with spacing portion (376), positioning seat (372) is leaning on spacing portion (373) one side is provided with spacing groove (373), the both sides of spacing groove (373) are provided with the inclined plane respectively, positioning seat (372) when rotating, spacing portion (376) enters into spacing groove (373) through the inclined plane.

10. An automatic cutting method for tray residue is characterized by comprising the following steps: an automatic cutting device for the tray residues according to any one of claims 1 to 9 is adopted, and the cutting method comprises the following steps:

S1, placing a tray (400) to be processed into a support (100) for positioning;

S2, a first lifting seat (210) of the cutting device (200) descends, so that round corner cutting knives (220) at four corners are driven to descend to cut off residual materials (403) at four round corners of the tray (400), the first lifting seat (210) stops descending, at the moment, four side edge cutting knives (240) at four sides are respectively attached to four side edges of the tray (400), and the cutting edges of the side edge cutting knives (240) face to the residual materials (403) at the side edges of the tray (400); when the side cutting knife (240) faces the excess material (403) on the side of the tray (400), the initial position of the side cutting knife (240) is positioned at the round corner cutting knife (220) on one side;

S3, starting the first conveying device (230), driving the side cutting knives (240) positioned on the four sides of the tray (400) to move towards the round corner cutting knives (220) positioned on the other side, and cutting off the residual materials (403) on the four sides of the tray (400) by the cutting edges of the side cutting knives (240) in the moving process;

S4, after the side cutting knife (240) moves to the round corner cutting knife (220) on the other side, the first conveying device (230) stops, the cutting is completed, the first lifting seat (210) ascends, the first conveying device (230) is reversely started, and then the side cutting knife (240) is driven to return to the initial position;

S5, a second lifting seat (310) of the remolding device (300) is lifted, so that the surface treatment device (340) is driven to lift, and a nozzle of the surface treatment device (340) faces to a residue cutting position;

S6, starting the annular conveying device (320), starting the surface treatment device (340), driving the surface treatment device (340) to rotate along the tray (400) for one circle, and carrying out surface remolding treatment on scratches, burrs and film-closing lines after cutting of the residual materials (403);

S7, after the surface remodeling treatment is finished, the surface treatment device (340) is closed, the annular conveying device (320) is stopped, and the second lifting seat (310) is lowered back to the initial position;

s8, taking out the cut and processed tray (400) from the support (100).