CN211517591U

CN211517591U - Rubber preforming shearing device

Info

Publication number: CN211517591U
Application number: CN201922162407.5U
Authority: CN
Inventors: 周宗波; 郭锐; 高志慧; 刘立松
Original assignee: Suzhou Weiming Rubber Co ltd
Current assignee: Suzhou Weiming Rubber Co ltd
Priority date: 2019-12-05
Filing date: 2019-12-05
Publication date: 2020-09-18
Anticipated expiration: 2029-12-05

Abstract

The utility model relates to a rubber preforming shearing mechanism, it includes support, cutter body and the motor that drives the cutter body and rise and fall, the motor rotates and is connected with the feeding roller, the cutter body below is equipped with the cutting bed, be fixed with two slide rails on the support, be equipped with the sliding body that removes along the slide rail between the slide rail, cutter body back of a knife fixed connection is on the sliding body, be equipped with flattening device around the cutter body, flattening device includes the mechanism that flattens of swing joint on the sliding body and is located the adsorption apparatus on the cutting bed. The utility model discloses with rubber the effect of mechanism and adsorption apparatus mechanism that is flattened when cutting down on the cutting bed of laminating down to improve the regularity of cutting cross-section, have the precision specification that improves and cut, reduce the effect of defective percentage.

Description

Rubber preforming shearing device

Technical Field

The utility model belongs to the technical field of cutting device's technique and specifically relates to a rubber preforming shearing mechanism is related to.

Background

The existing rubber preforming cutting device is called a rubber strip cutting machine and a strip cutting and bundling machine, is a necessary choice for cutting and bundling strips and cutting rolling strips in industries such as shoemaking, clothes, cases, shoes and hats, auxiliary materials for clothing, medical supplies, reflective material factories, tent factories, umbrella factories, gift packages, color flag manufacturing, decorative auxiliary materials and the like, and is suitable for the auxiliary materials for clothing to have: non-woven adhesive interlining, including spun-bonded interlining, double-sided adhesive interlining, cloth strips, nylon adhesive interlining, shoemaking, hat making, leather, lining cloth, adhesive tape, paper making, handbag and other industries, and strips with different widths, straight and oblique cutting.

The prior Chinese patent publication No. CN207509529U discloses a novel rubber slitter, which comprises a base frame and a slitter body, the left side and the right side of the base frame are respectively provided with a left side cover plate and a right side cover plate, the left side cover plate and the right side cover plate are both in threaded connection with a sliding body, the front end of the sliding body is provided with a regulator, the sliding body is provided with a sliding chute, the two ends of the slitting cutter body are connected with the sliding body in a sliding way through the sliding chute, the bottom of the slitting cutter body is provided with an oil guide groove which is connected with an oil collecting tank arranged on the outer wall of the left side cover plate, a long rotating shaft is arranged between the left side cover plate and the right side cover plate, a large belt pulley is arranged on one side of the long rotating shaft, the base shelf upper surface is provided with the slitting motor, install the slitting speed regulator in the slitting motor pivot, the slitting speed regulator other end is connected with the belt lace wheel.

The above prior art solutions have the following drawbacks: as shown in fig. 1, when the cutter body cuts rubber, because the rubber has elasticity, the cutter body presses on the rubber to tilt the two ends of the rubber, and when the rubber is cut, the cut surface of the rubber generates depression, the depression degree is uncontrolled, so that the width and quality of the rubber strip are not controlled, the precision specification of the rubber strip is reduced, and the defective rate is increased.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a rubber preforming shearing mechanism, it has the specification precision that cuts that has improved rubber products, has reduced the defective percentage to the not enough of prior art existence.

The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme: a rubber preforming shearing device comprises a support, a cutter body, a motor for driving the cutter body to rise and fall, and a feeding roller driven by the motor to transmit, wherein a cutting table is arranged below the cutter body, two sliding rails are fixed on the support and are perpendicular to the cutting table, a sliding body which vertically moves along the sliding rails is arranged between the sliding rails, the opposite side end of a cutting edge of the cutter body is fixedly connected to the sliding body, a flattening device is arranged around the cutter body, and the flattening device comprises a flattening mechanism movably connected to the sliding body and an adsorption mechanism positioned on the cutting table;

the feeding mechanism is characterized in that a placing cross rod is arranged between the supports, a transmission is fixed on the placing cross rod, the input end of the transmission is connected with the output shaft of the motor through a gear pair, an incomplete gear is arranged on the output shaft of the transmission, an eccentric boss is fixed on the end face of the incomplete gear and hinged with a sliding body through a connecting rod, the feeding roller is in meshing transmission with the incomplete gear through a speed regulator, and the incomplete gear is not in transmission with the speed regulator when the eccentric boss is at the lowest side.

According to the technical scheme, in the cutting process of rubber, the rubber is attached to the cutting table through the flattening mechanism and the adsorption mechanism which are arranged around the cutter body, so that the cutting end face of the rubber is more regular, the cutting precision is improved, and the defective rate is reduced;

the motor drives the transmission to rotate, the incomplete gear rotates along with the output end of the transmission by controlling the transmission to output a required rotating speed, and simultaneously drives an eccentric boss arranged on the end surface of the gear to rotate, the eccentric boss drives a connecting rod to enable a sliding body to reciprocate along a sliding rail, so that the cutter body is driven to cut rubber, and at the moment, the toothless part of the incomplete gear is opposite to a gear connected with the feeding roller, so that the feeding roller stops rotating and does not feed; when the cutter body is lifted, the toothed part of the incomplete gear is meshed with the feeding roller gear to drive the feeding roller to feed; the gear transmission structural design ensures the stability of the rotating speed output of the motor, and meanwhile, the incomplete gear is set so that feeding is not carried out during cutting, so that the problem of rubber accumulation during cutting is solved, and the cutting precision of rubber strips is improved.

The scheme further sets up as: the adsorption mechanism comprises a cutting plate and a vacuum pump, the cutting plate is embedded on a cutting table, a plurality of through holes are formed in the cutting plate, an arched baffle is fixedly connected below the cutting plate, a vacuum air duct is fixedly arranged below the baffle, and the vacuum air duct is connected with the vacuum pump.

Through above-mentioned technical scheme, after rubber gets into the cutting bed, place on the cutting board, vacuum pump work makes cutting board below produce the negative pressure, and rubber is laminated on the cutting board under the effect of atmospheric pressure, has further increased the planarization of rubber when the cutting.

The scheme further sets up as: the vacuum air duct is characterized in that a collecting box is sleeved outside the vacuum air duct and is connected with a cutting table around the cutting plate in a sealing mode, a discharging hole is formed in the bottom surface of the collecting box, and a sealing door is arranged on the discharging hole.

Through the technical scheme: the crushed aggregates that the cutting rubber produced fall into the below through the through-hole on the cutting board, fall into the collection box through cowl again in, can open the sealing door on the collecting box when collecting a certain amount and retrieve the crushed aggregates for the crushed aggregates can be retrieved and is reused, has guaranteed the planarization of cutting plane and then has increased cutting accuracy.

The scheme further sets up as: the flattening mechanism comprises a flattening plate, a sliding guide pillar is fixedly connected to the flattening plate, a guide hole for the sliding guide pillar to slide is formed in the sliding body, a positioning piece is detachably connected to the sliding guide pillar, and the size of the outer edge of the positioning piece is larger than the size of the transverse circle of the guide hole.

According to the technical scheme, when the cutter body falls, the flattening device firstly contacts rubber to enable the rubber to be attached to the cutting table, and then the cutter body continuously falls to cut the rubber, so that the rubber cannot be tilted in the cutting process, the regularity of a cutting surface is improved, and the cutting precision is further improved;

the pressure plate is fixedly connected with the sliding guide post, and then the pressure plate passes through the guide hole to be connected with the sliding body, the planarity of the pressure plate is ensured, the pressure plate is movably linked on the sliding body through the sliding guide post, so that the pressure plate is pressed on rubber, the sliding body drives the cutter body to continue to move downwards, the sliding guide post passes through the guide hole to enable the pressure plate to no longer bear the force to continue to extrude the rubber downwards, the structural design prevents the pressure plate from excessively extruding the rubber, the excessive deformation of the rubber is cut, and then the cutting precision is uncontrolled, and meanwhile, the structural design can meet the requirements of the cutting of rubber sheets with different thicknesses.

The scheme further sets up as: the pressing plate is located right below the cutter body, and a strip-shaped through hole for the cutter body to pass through is formed in the pressing plate.

Through the technical scheme, the cutter body downwards cuts through the strip-shaped through hole, and the pressing plate can press the rubber on the two sides of the cutter body to be flat on the cutting surface, so that the deformation of the rubber during cutting is smaller, and the shape of the cutting surface is more regular and controllable.

The scheme further sets up as: the sliding guide pillar is provided with a thread at one end far away from the pressing plate, the positioning piece is a locking nut matched with the thread, and the locking nut is screwed at the threaded part of the sliding guide pillar.

Through above-mentioned technical scheme, through adjusting lock nut position on the slip guide pillar, can adjust the distance between dull and stereotyped and the slider, and then adjust the dull and stereotyped rubber pressing time, when preventing to cut the rubber of higher thickness, the feeding roller still in the cutting bed when pay-off the dull and stereotyped rubber specification that has pressed to lead to cutting out on rubber not set for the specification to reduce the defective percentage.

The scheme further sets up as: a plurality of reset springs are arranged between the sliding body and the pressing plate, a first positioning groove for placing the reset springs is formed in the sliding body, and a second positioning groove is formed in the position, opposite to the first positioning groove, of the sliding body.

Through the technical scheme, the reset springs are arranged between the sliding body and the pressing plate, so that the pressing force of the pressing plate on rubber can be increased, the rubber can be better prevented from tilting when being cut, the stability of the working performance of the pressing plate is improved, the defective rate is reduced, when the pressing plate is lifted upwards along with the sliding body, the pressing plate quickly rebounds to the original state under the action of the reset springs and the self gravity to meet the time when the pressing plate presses the rubber during next cutting, and the defective rate is further reduced.

The scheme further sets up as: the first positioning groove comprises a rotary connection hole and a lifting platform which is in rotary connection with the rotary connection hole, and the reset spring is placed on the lifting platform.

Through above-mentioned technical scheme, reset spring installs in first constant head tank, can make the elevating platform change at downthehole position through rotatory downthehole elevating platform of revolving, and then adjusts the pretightning force of putting the reset spring on the elevating platform to hide the cutting of different model rubbers.

The scheme further sets up as: and a rolling ball bearing is embedded on the inner wall of the guide hole, and a rolling ball in the rolling ball bearing extends out of the inner wall of the rolling ball bearing.

Through the technical scheme, the sliding friction between the sliding guide column and the guide hole is changed into rolling friction, so that the pressure of the flattening sheet on the rubber is further controlled, the sliding guide column is in close contact with the guide hole, the sliding guide column can only slide up and down along the guide hole, and the left and right inclination is avoided, so that the phenomenon that the flattening plate inclines left and right due to the tilting of one end of the rubber and the tilting end cannot be flattened on the cutting table is avoided.

The scheme further sets up as: a control console is arranged on one side of the support, the speed changer and the speed regulator are both electric control automatic differentials, and the speed changer and the speed regulator are both electrically connected with the control console.

Through the technical scheme, the output rotating speed of the transmission can be controlled through the control console, so that the rotating speed of the crankshaft is changed, the rising and falling speed of the cutter body connected with the crankshaft is further changed, the overall working efficiency is further controlled, the conveying speed of the feeding roller is changed by controlling the speed regulator through the control console, and the rubber cutting length is further changed.

To sum up, the utility model discloses a following at least one useful technological effect:

1. through flattening device for rubber can not warp because of the pressure of cutter body when the cutting, thereby makes the cutting plane of rubber regular more, and then makes the precision specification of rubber strip improve.

2. Through the meshing transmission of the incomplete gear and the speed regulator, after the pressing plate presses the rubber, the feeding roller can not feed the rubber to the cutting table again to be accumulated, so that the defective rate is further reduced more stably in the cutting process.

Drawings

FIG. 1 is a schematic view of rubber cutting;

FIG. 2 is a front side overall schematic view of the present embodiment;

FIG. 3 is a rear side view showing the entire structure of the present embodiment;

FIG. 4 is a schematic view of the internal structure of the present embodiment;

FIG. 5 is a schematic view of the transmission mechanism of the present embodiment;

FIG. 6 is an exploded view of the flattening mechanism of the present embodiment;

FIG. 7 is a sectional view for showing the adsorption mechanism;

FIG. 8 is an enlarged partial schematic view of portion A of FIG. 7;

fig. 9 is a sectional view of the slider of the present embodiment.

Reference numerals: 1. a support; 2. a cutter body; 3. a motor; 4. a feeding roller; 5. a slide rail; 6. a sliding body; 8. sliding the guide post; 9. a positioning member; 10. placing a cross bar; 11. a transmission; 12. an incomplete gear; 13. an eccentric boss; 15. a connecting rod; 16. a speed regulator; 17. screwing holes; 18. a strip-shaped through hole; 19. a first positioning groove; 20. a second positioning groove; 21. a return spring; 22. a lifting platform; 23. a rolling ball bearing; 24. a ball bearing; 25. cutting table; 26. cutting the board; 27. a baffle plate; 28. a vacuum air duct; 29. a collection box; 30. a sealing door; 31. a flattening mechanism; 32. an adsorption mechanism; 33. pressing a flat plate; 34. a guide hole; 35. a console; 36. a vacuum pump; 37. a driven drum.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 2 and 3, in order to disclose the rubber preforming shearing apparatus of the present invention, the rubber preforming shearing apparatus includes a support 1, two sliding rails 5 are fixedly connected above the support 1, a sliding body 6 is slidably connected between the two sliding rails 5, and the sliding body 6 vertically slides along the sliding rails 5; the knife body 2 and the knife back are fixedly assembled on the sliding body 6, and the sliding body 6 is movably connected with a pressing plate 33. A cutting table 25 is fixed in the middle of the support 1, a pair of mutually meshed and rotating feeding rollers 4 is arranged on one side of the cutting table 25, and a row of driven rollers 37 are arranged inside the support 1 on one side, far away from the cutter body 2, of the feeding rollers 4. Fixed motor 3 and the vacuum pump 36 of being equipped with in support 1 bottom, the fixed control cabinet 35 that is equipped with in support 1 outside, electric connection between motor 3 and vacuum pump 36 all and the control cabinet 35, accessible control cabinet 35 control vacuum pump 36 and motor 3 open and stop.

Referring to fig. 4 and 5, a motor 3 is fixedly installed at the bottom of a support 1, a plurality of placing cross rods 10 are arranged between the support 1 above the motor 3, a transmission 11 is fixedly installed on the placing cross rods 10, the motor 3 is connected with the transmission 11 through a gear, an incomplete gear 12 is installed at the output end of the transmission 11, an eccentric boss 13 is fixed on the end face of the gear, a connecting rod 15 is hinged between the eccentric boss 13 and a sliding body 6, and the eccentric boss is driven to rotate through the rotation of the incomplete gear 12 so as to drive the connecting rod 15 and the sliding body 6 to reciprocate along a sliding rail, so that a cutter body 2 is driven to cut rubber.

The placing cross rod 10 is fixed with a speed regulator 16, the input end of the speed regulator 16 is meshed with the incomplete gear 12 through a gear, the output end of the speed regulator 16 is in gear transmission with the feeding roller 4, when the toothed part of the incomplete gear 12 is meshed with the speed regulator 16 through a gear set, the speed regulator 16 is driven to rotate, the feeding roller 4 is driven to roll for feeding, and when the toothless part of the incomplete gear 12 is opposite to the speed regulator 16, the speed regulator 16 does not rotate, so that the feeding roller 4 stops rotating for feeding. The rotating speed of the feeding roller 4 is adjusted by rotating the speed regulator 16 to output the rotating speed, thereby adjusting the cutting width of the rubber strip. Referring to fig. 2, the speed governor 16 and the speed variator 11 are both electrically controlled automatic differentials, the speed variator 11 and the speed governor 16 are both electrically connected to a console 35, and the console 35 is a PLC integrated console.

Referring to fig. 6, the flattening mechanism 31 includes a flattening plate 33, four sliding guide pillars 8 and a positioning element 9, the sliding guide pillars 8 are vertically fixed on the flattening plate 33, the four sliding guide pillars 8 are uniformly distributed on the flattening plate 34, the upper end of the sliding guide pillar 8 is threaded, the positioning element 9 is a lock nut, the sliding body 6 is provided with a guide hole 34 for the sliding guide pillar 8 to pass through, the outer edge dimension of the lock nut is larger than the dimension of the guide hole 34, the lock nut is screwed after the sliding guide pillar 8 passes through the guide hole 34, so that the flattening mechanism 31 is movably connected to the sliding body 6, and the distance between the flattening plate 33 and the cutter body 2 can be changed by adjusting the position of the lock nut on the sliding body 6, thereby adjusting the time for the flattening plate 33 to press rubber. When the platen 33 is pressed down, the platen 33 presses the rubber against the lifting by its own weight alone.

The pressing plate 33 is provided with a plurality of first positioning grooves 19, the sliding body 6 is provided with a second positioning groove 20 opposite to the first positioning groove 19, the first positioning groove 19 is a screwing hole 17 penetrating through the pressing plate 33, threads are turned in the screwing hole 17, a lifting platform 22 matched with the screwing hole 17 is screwed in the screwing hole 17, the second positioning groove 20 is a blind groove, a reset spring 21 is arranged between the two positioning grooves, the reset spring 21 can increase the pressure when the pressing plate 33 presses rubber, and meanwhile, when the sliding body 6 is lifted upwards, the pressing plate 33 can be quickly reset to a natural state. A groove is formed in the lifting platform 22, and the deformation quantity of the return spring 21 on the lifting platform 22 can be changed by rotating the position of the lifting platform 22 in the hole through the linear groove, so that the pretightening force of the return spring 21 is changed.

The middle of the pressing plate 33 is provided with the strip-shaped through hole 18 for the cutter body 2 to pass through, when the cutter body 2 penetrates through the cutting rubber from the middle of the pressing plate 33, the pressing plate 33 can press the rubber around the cutter body 2 on the cutting table 25, the regularity of the cutting end face is further improved, and the precision is improved.

Referring to fig. 7 and 8, the cutting board 26 of establishing is inlayed on the cutting bed 25 under the cutter body 2 to absorption mechanism 32, be equipped with a plurality of through-holes on the cutting board 26, cutting board 26 below is equipped with cowl 27, be fixed with the reference column on the cowl 27 lateral wall, the baffle 27 below is provided with vacuum dryer 28, the outside cover of vacuum dryer 28 is equipped with collecting box 29, cowl 27 passes through on the reference column fixed connection collecting box 29 inner wall, collecting box 29 and the outer wall sealing connection of vacuum dryer 28, the drain hole has been seted up to collecting box 29 bottom, be equipped with sealing door 30 on the drain hole, one side of sealing door 30 articulates on the box outer wall, vacuum dryer 28 runs through collecting box 29 and links to each other with vacuum pump 36 fixed on support 1 bottom surface.

Referring to fig. 9, the ball bearings 23 are embedded in the guide holes 34 of the slider 6, and the balls 24 in the ball bearings 23 protrude from the inner walls of the ball bearings 23.

The implementation principle of the embodiment is as follows:

the starting motor 3 drives the variable-speed rotation, the transmission 11 adjusts the incomplete gear 12 to have an adjustable rotating speed, so as to drive the end surface eccentric boss 13 to rotate, the eccentric boss 13 further drives the connecting rod 15 to move, so that the sliding body 6 hinged with the connecting rod 15 reciprocates, and the cutter body 2 fixedly installed on the sliding body 6 reciprocates to cut rubber; meanwhile, the incomplete gear 12 is in meshing transmission with the speed regulator 16, when a toothed part is meshed with the speed regulator 16, the feeding roller 4 is driven to rotate for feeding, and when a toothless part rotates to be opposite to the speed regulator 16, the speed regulator 16 can not rotate without input of rotation energy, so that the rotation is stopped; the rotating speed of the feeding roller 4 can be adjusted by adjusting the speed regulator 16 so as to adjust the cutting width of the rubber strip.

When rubber enters the cutting plate 26, the rubber covers the through holes in the cutting plate 26, the vacuum pump works to reduce the pressure below the cutting plate 26, and the rubber is pressed on the cutting plate 26 under the action of the atmospheric pressure. When the cutter body 2 falls, the pressing plate 33 below the cutter body 2 contacts the rubber strip first, so that the rubber strip is tightly attached to the cutting table 25, when the cutter body 2 continuously falls, the pressing plate 33 is blocked, the sliding guide post 8 fixedly connected with the pressing plate passes through the guide hole 34 and does not continue downwards, but the distance between the sliding body 6 and the pressing plate 33 is reduced, so that the elastic force of the reset spring 21 between the sliding body 6 and the pressing plate 33 is increased by extrusion deformation, the pressure of the pressing plate 33 on the rubber is increased, and the rubber with the increased elastic force due to the cutting and extrusion of the cutter body 2 can still be attached to the cutting table 25 smoothly. After the cutter body 2 is cut, the cutter body is lifted upwards, the pressing plate 33 is still pressed on the rubber strip under the action of the elastic force of the reset spring 21 and the self gravity, the pressing plate 33 leaves the rubber after the cutter body 2 rises to a certain height, the rubber is cut off, a cutting crack is generated in the middle of the cutting, so that the vacuum environment below the rubber strip is damaged, the feeding roller 4 starts feeding at the moment, the cut rubber strip leaves the cutting table 25 under the pushing of the rubber at the rear, and meanwhile, the pressing plate 33 is quickly restored to the original state under the action of the elastic force of the reset spring 21 so as to meet the time of pressing the rubber during the next cutting.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. The utility model provides a rubber preforming shearing mechanism, includes support (1), cutter body (2) and motor (3) that drive cutter body (2) rise and fall, drives by motor (3) and carries out driven feeding roller (4), cutter body (2) below is equipped with cutting bed (25), its characterized in that: the cutting tool is characterized in that two sliding rails (5) are fixed on the support (1), the two sliding rails (5) are perpendicular to the cutting table (25), a sliding body (6) which vertically moves along the sliding rails (5) is arranged between the sliding rails (5), the tool back of the tool body (2) is fixedly connected to the sliding body (6), a flattening device is arranged around the tool body (2), and the flattening device comprises a flattening mechanism (31) movably connected to the sliding body (6) and an adsorption mechanism (32) positioned on the cutting table (25);

the automatic feeding device is characterized in that a placing cross rod (10) is arranged between the supports (1), a transmission (11) is fixed on the placing cross rod (10), the input end of the transmission (11) and the output shaft of the motor (3) are mutually transmitted through a gear pair, an incomplete gear (12) is arranged on the output shaft of the transmission (11), an eccentric boss (13) is fixed on the end face of the incomplete gear (12), the eccentric boss (13) is hinged with the sliding body (6) through a connecting rod (15), the feeding roller (4) is meshed with the incomplete gear (12) through a speed regulator (16) for transmission, and the toothless part of the incomplete gear (12) is not transmitted with the speed regulator (16) when the eccentric boss (13) is at the lowest side.

2. A rubber preforming shearing device as claimed in claim 1, characterised in that: adsorption equipment constructs (32) including cutting board (26) and vacuum pump (36), cutting board (26) are inlayed and are established on cutting bed (25), be equipped with a plurality of through-holes on cutting board (26), cutting board (26) below fixedly connected with arch baffle (27), fixed vacuum dryer (28) of being equipped with in baffle (27) below, vacuum dryer (28) link to each other with vacuum pump (36).

3. A rubber preforming shearing device as claimed in claim 2, characterised in that: the vacuum air duct (28) is externally sleeved with a collecting box (29), the collecting box (29) is connected with a cutting table (25) around a cutting plate (26) in a sealing mode, a discharging hole is formed in the bottom face of the collecting box (29), and a sealing door (30) is arranged on the discharging hole.

4. A rubber preforming shearing device as claimed in claim 1, characterised in that: the flattening mechanism (31) comprises a flattening plate (33), a sliding guide post (8) is fixedly connected to the flattening plate (33), a guide hole (34) for the sliding guide post (8) to slide is formed in the sliding body (6), and a positioning part (9) used for being hung on the sliding body (6) is arranged on the sliding guide post (8).

5. A rubber preforming shearing device as claimed in claim 4, characterised in that: the pressing plate (33) is located under the cutter body (2), and a strip-shaped through hole (18) for the cutter body (2) to pass through is formed in the pressing plate (33).

6. A rubber preforming shearing device as claimed in claim 4, characterised in that: the sliding guide post (8) is provided with a thread at one end far away from the pressing plate (33), the positioning piece (9) is a locking nut matched with the thread, and the locking nut is screwed at the position where the sliding guide post (8) has the thread.

7. A rubber preforming shearing device as claimed in claim 5, characterised in that: a plurality of reset springs (21) are arranged between the sliding body (6) and the pressing plate (33), a first positioning groove (19) for the reset springs (21) to be placed is formed in the sliding body (6), and a second positioning groove (20) is formed in the position, opposite to the first positioning groove (19), of the sliding body (6).

8. A rubber preforming shearing device as claimed in claim 7, characterised in that: the first positioning groove (19) comprises a screwing hole (17) and a lifting platform (22) screwed in the screwing hole (17), and the reset spring (21) is placed on the lifting platform (22).

9. A rubber preforming shearing device as claimed in claim 4, characterised in that: and a rolling ball bearing (23) is embedded in the inner wall of the guide hole (34), and a rolling ball (24) in the rolling ball bearing (23) extends out of the inner wall of the rolling ball bearing (23).

10. A rubber preforming shearing device as claimed in claim 2, characterised in that: support (1) one side is equipped with control cabinet (35), derailleur (11) and speed regulator (16) are automatically controlled automatic differential, and derailleur (11) and speed regulator (16) all are connected with control cabinet (35) electric.