CN217098088U - Die-cutting machine with self-centering device - Google Patents

Abstract

The utility model discloses a die-cutting machine with a self-centering device, which comprises a frame provided with a material loading device, a centering adjusting device, a feeding device and a die-cutting device; the material loading device comprises a bearing block fixedly arranged on the rack, a fixed shaft is rotationally connected in the bearing block, a hollow discharging roller is fixedly arranged on the fixed shaft, and one end of the discharging roller is rotationally and detachably arranged on the rack; the centering adjusting device comprises a threaded shaft arranged in the discharging roller, the right end of the threaded shaft is rotatably connected to the fixed shaft, the left end of the threaded shaft is fixedly provided with a knob capable of controlling the threaded shaft to rotate, and the knob is rotatably connected with the discharging roller; the threaded shaft is provided with a fixed triangular claw component and a tightening claw component which can move reversely along the axial direction of the threaded shaft; two groups of first slotted holes used for fixing the triangular claw assemblies and the elastic claw assemblies to extend out are formed in the discharging roller. Have and carry out the self-centering device who fixes a position to the material area winding cylinder, the material area position is accurate when guaranteeing cutting device to carry out the cross cutting, has improved cross cutting efficiency.

Description

Die-cutting machine with self-centering device

Technical Field

The utility model relates to a cross cutting machine specifically is a cross cutting machine with from centring means.

Background

The die cutting machine is mainly used for die cutting and indentation of non-metal materials, non-setting adhesives, double faced adhesive tapes and the like, utilizes a template carved by a steel knife, a hardware die or a steel plate and applies certain pressure through an embossing plate to roll and cut a printed product or a paper board into a certain shape, and is important equipment for packaging, processing and forming after printing.

However, the existing die cutting machine often has inaccurate die cutting positioning due to long-time continuous work, thereby causing low working efficiency. Moreover, the existing die-cutting machine cannot stably convey the raw material belts with different thicknesses, so that the raw material belts are easy to shake in the process of die cutting transmission, the tension of the raw material belts is unstable, the die-cutting position deviation is large, equipment accidents are caused even if the machine is damaged due to the falling of the raw material belts, and the finished product ratio is low.

Aiming at the problems of the existing equipment, a self-centering die cutting machine which has the advantages of simple structure, accurate positioning, large and stable tensioning force, convenient operation and long service life must be designed.

Disclosure of Invention

An object of the utility model is to provide a cross cutting machine with from centring means has and carries out the centring means from of fixing a position to the material area winding cylinder, and the material area position is accurate when guaranteeing that cross cutting device carries out the cross cutting, has improved cross cutting efficiency.

In order to achieve the above purpose, the utility model adopts the following technical scheme to realize:

a die-cutting machine with a self-centering device comprises a rack, wherein a material loading device, a centering adjusting device, a feeding device and a die-cutting device are arranged on the rack;

the material loading device comprises a bearing seat fixedly arranged on the right side of the rack, a fixed shaft is rotatably connected in the bearing seat, a hollow discharging roller is fixedly arranged at the left end of the fixed shaft, and the left end of the discharging roller is rotatably and detachably arranged on the left side of the rack;

the centering adjusting device comprises a threaded shaft arranged in the discharging roller, the left end of the threaded shaft is rotatably connected to the fixed shaft, a knob capable of controlling the threaded shaft to rotate is fixedly installed at the left end of the threaded shaft, and the knob is rotatably connected to the discharging roller;

the thread shaft is symmetrically provided with a fixed triangular claw component and a tightening claw component which can move reversely along the axial direction of the thread shaft; the fixed triangular claw assembly comprises a fixed triangular claw shaft movably connected to the left side of the threaded shaft, and three fixed triangular claws are uniformly and fixedly installed on the circumference of the fixed triangular claw shaft;

the elastic claw assembly comprises a group of elastic claw fixing inner rings and elastic claw fixing outer rings which are movably connected to the threaded shaft and can move reversely in the axial direction of the threaded shaft, three elastic claws are uniformly hinged to the circumferential direction of the elastic claw fixing inner rings, the tail ends of the elastic claws are hinged to connecting rods, and one ends of the connecting rods are hinged to the elastic claw fixing outer rings;

the feeding roller is provided with two groups of rectangular strip-shaped first slotted holes for fixing the triangular claws and the elastic claws to extend out, so that the feeding roller is clamped on the inner wall of the material belt winding drum.

Furthermore, the loading device also comprises a static slide rail fixedly arranged on the rack, a movable slide rail is connected onto the static slide rail in a sliding manner, a strip-shaped second slotted hole is formed in the movable slide rail, and a fastening bolt for fixing the movable slide rail is arranged in the second slotted hole;

the top end of the movable sliding rail is fixedly provided with a U-shaped clamping channel for fixing the left end of the feeding roller.

Furthermore, the feeding device comprises a group of rubber roller shaft brackets which are symmetrically and fixedly arranged on the left side and the right side of the rack, and a first rubber roller and a second rubber roller which are matched with each other are rotatably connected to the rubber roller shaft brackets;

a third slotted hole is formed in the rear end of the rubber roll shaft frame, a rubber roll shaft of the second rubber roll is rotatably connected in the third slotted hole and can move back and forth in the third slotted hole, a jackscrew is fixedly installed at the rear end inside the third slotted hole, and a pressure spring is fixedly installed on the jackscrew; a connecting ring is rotatably connected to a rubber roll shaft of the second rubber roll, and one end of the pressure spring is fixedly arranged on the connecting ring;

a first motor for driving the first rubber roller to rotate is arranged on the rubber roller shaft frame, so that the first rubber roller rotates and drives the second rubber roller to rotate, and the material belt is clamped and conveyed;

the rack is rotatably connected with a group of transmission rollers which are parallel to the first rubber roller and the second rubber roller and are positioned at the rear lower part of the rack, and a conveying belt for conveying the material belt is arranged on the transmission rollers; and a second motor for driving the transmission roller is arranged on the rack.

Furthermore, the feeding device also comprises a first optical axis, a second optical axis, a third optical axis and a tensioning roller set which are fixedly mounted on the frame and are parallel to each other, the first optical axis is arranged right behind the discharging roller and is parallel to the discharging roller, the second optical axis is arranged right above the first optical axis, the third optical axis is arranged right behind the second optical axis, the tensioning roller set inclining downwards is arranged below the second optical axis and the third optical axis, the tensioning roller set is composed of three tensioning rollers which are parallel to each other, and two ends of each tensioning roller are fixedly mounted with connecting side plates;

the second optical axis and the third optical axis are respectively arranged on the front side and the rear side of the first rubber roller and the second rubber roller and are parallel to the first rubber roller and the second rubber roller.

Further, the die cutting device comprises a group of slide rails symmetrically arranged on the left side and the right side of the rack, a first slide block is connected on each slide rail in a sliding manner, a moving platform is fixedly arranged at the lower end of each first slide block and arranged above the conveying belt, a third motor is fixedly arranged on the left side of the upper end of the moving platform, and a first synchronous belt pulley is arranged on an output shaft of the third motor;

a second synchronous belt wheel is installed on the right side of the upper end of the moving platform through a support, and a synchronous belt is connected to the first synchronous belt wheel and the second synchronous belt wheel;

the inboard of moving platform runs through to install the tool rail, and sliding connection has the second slider on the tool rail, and the upper end and the hold-in range fixed connection of second slider can remove along the tool rail is moved under the drive of hold-in range, and second slider bottom fixed mounting cuts out the sword.

Furthermore, a group of support groups for supporting the conveyor belt is fixedly arranged on the rack.

Furthermore, the right end of the material discharging roller is connected with the knob through two semicircular connecting pieces, so that the knob can rotate relative to the material discharging roller to drive the threaded shaft to rotate.

Further, the inner surface of the card way is provided with a sawtooth-shaped pattern.

Further, knife rests are fixedly mounted on two sides of the bottom end of the moving platform.

Further, the bottom of the support group is provided with a cavity.

The utility model discloses following beneficial effect has:

rotate the screw spindle through the knob, the fixed inner circle of elasticity claw and the fixed outer lane reverse movement of elasticity claw for the elasticity claw opens and pushes up tightly on the material area bobbin inner wall, fixed triangle claw axle moves left simultaneously, make fixed triangle claw block together on the material area bobbin inner wall, fixed triangle claw plays the flat horizontal effect of symmetry, supplementary elasticity claw realizes the centering effect to the raw materials area, accomplish to the heart regulation, thereby avoid the material area bobbin to remove about on the blowing cylinder or rock the accuracy that influences follow-up cross cutting position.

When the material is changed, the movable slide rail of the material loading device moves backwards along the static slide rail, and the clamping channel moves backwards together with the movable slide rail, so that the left end of the discharging roller is separated from the opening of the U-shaped clamping channel, the material belt winding drum is conveniently taken down from the left end of the discharging roller or sleeved, and the material belt is changed.

A pressure spring is arranged in a second groove hole formed in a rubber roller shaft frame in the feeding device through a jackscrew, and one end of the pressure spring is connected with a connecting ring on a rubber roller shaft of a second rubber roller, so that the second rubber roller can move backwards under the action of reverse extrusion force of the material belt while rotating, the distance between the second rubber roller and the first rubber roller is increased, and the feeding device can be suitable for material belts with different thicknesses; the elasticity of pressure spring is restored and can be extrudeed the second rubber roll and move forward and make it hug closely the material area surface, can press from both sides the material area tightly when making first rubber roll and second rubber roll transmission material area then, increases the tensile force, further guarantees the position accuracy of material area when the cross cutting.

First optical axis, second optical axis, third optical axis and tensioning roller set among the material feeding unit ensure that the material area is by abundant tensioning in the pay-off process, guarantee to pass the material area position accuracy among the cutting device, improve cross cutting efficiency.

When the same batch of material belts are processed, the moving platform of the die cutting device is adjusted to a required position and then fixed, the third motor repeatedly rotates forwards and backwards to drive the first synchronous belt pulley to rotate and drive the second synchronous belt pulley to rotate through the synchronous belt, and the synchronous belt drives the second sliding block to reciprocate leftwards and rightwards to enable the cutting knife to cut the material belts; the setting of support group can play the fixed effect of conveying belt support, establishes the cavity with support group bottom, can reduce its weight.

The knob and the discharging roller are connected through the two semicircular connecting pieces and can rotate relatively, when the knob is clamped in the clamping channel, the threaded shaft can be rotated through the knob, the discharging roller can be ensured to rotate, and the structure is simple and convenient to operate.

The knife rests are fixedly arranged on two sides of the bottom end of the moving platform, so that a supporting effect can be achieved, and the material belt on the conveying belt can be fixed.

Drawings

FIG. 1: the utility model has the overall structure schematic diagram;

FIG. 2: the structure schematic diagram of the material loading device of the utility model;

FIG. 3: the structure schematic diagram of the right view of the material loading device of the utility model;

FIG. 4: the left view structure schematic diagram of the material loading device of the utility model;

FIG. 5: the structure schematic diagram of the discharging roller of the utility model;

FIG. 6: the utility model is a schematic sectional structure diagram of a discharging roller;

FIG. 7: the structure schematic diagram of the centering adjusting device of the utility model;

FIG. 8: the utility model discloses a schematic view of the installation structure of a knob and a discharging roller;

FIG. 9: the utility model is a schematic view of the sectional structure of the knob and the discharging roller;

FIG. 10: the structure schematic diagram of the connecting piece of the knob and the emptying roller of the utility model is shown;

FIG. 11: the structure schematic diagram of the feeding device of the utility model;

FIG. 12: the utility model discloses a schematic diagram of the installation structure of the rubber roller and the frame;

FIG. 13: the structure schematic diagram of the jackscrew and the pressure spring of the utility model;

FIG. 14: the structure schematic diagram of the tensioning roller group of the utility model;

FIG. 15: the structure schematic diagram of the die cutting device of the utility model;

FIG. 16: the structure schematic diagram of the knife track and the synchronous belt wheel of the utility model;

FIG. 17: the structure schematic diagram of the bracket group of the utility model;

in the figure: 1. a frame; 2. a bearing seat; 3. a fixed shaft; 4. a discharging roller; 5. a threaded shaft; 6. a knob; 7. fixing the triangular claw shaft; 8. fixing the triangular claw; 9. the elastic claw fixes the inner ring; 10. the elastic claw fixes the outer ring; 11. loosening and tightening claws; 12. a connecting rod; 13. a first slot; 14. a stationary slide rail; 15. a movable slide rail; 16. a second slot; 17. fastening a bolt; 18. blocking a channel; 19. a first optical axis; 20. a second optical axis; 21. a third optical axis; 22. a tension roller; 23. connecting the side plates; 24. a rubber roller shaft frame; 25. a first rubber roller; 26. a second rubber roller; 27. a rubber roll shaft; 28. a third slot; 29. carrying out top thread; 30. a pressure spring; 31. a connecting ring; 32. a first motor; 33. a driving roller; 34. a second motor; 35. a conveyor belt; 36. a bracket set; 37. a slide rail; 38. a first slider; 39. a mobile platform; 40. a third motor; 41. a first timing pulley; 42. a synchronous belt; 43. a tool path; 44. a second slider; 45. a cutting knife; 46. a tool holder; 47. a connecting member; 48. a cavity; 49. a second timing pulley.

Detailed Description

The following examples are provided to explain the present invention in detail, but not to limit the present invention.

As shown in fig. 1-10, a die cutting machine with a self-centering device comprises a machine frame 1, wherein the machine frame 1 is provided with a loading device, a centering adjusting device, a feeding device and a die cutting device; the material belt winding drum is fixed through the centering adjusting device arranged on the material loading device, so that the phenomenon that the material belt winding drum moves left and right to cause inaccurate follow-up die cutting positions is avoided, and then the material belt is conveyed to the die cutting device through the feeding device to be die-cut.

The material loading device comprises a bearing seat 2 fixedly arranged on the right side of the rack 1, a fixed shaft 3 is rotatably connected in the bearing seat 2, a hollow discharging roller 4 is fixedly arranged at the left end of the fixed shaft 3, and the left end of the discharging roller 4 is rotatably and detachably arranged on the right side of the rack 1, so that a material belt winding drum is conveniently arranged at the left end of the discharging roller 4; the feeding device comprises a fixed slide rail 14 on the rack 1, a movable slide rail 15 is connected to the fixed slide rail 14 in a sliding manner, a strip-shaped second slotted hole 16 is formed in the movable slide rail 15, a fastening bolt 17 used for fixing the movable slide rail 15 is installed in the second slotted hole 16, a U-shaped clamping channel 18 used for fixing the right end of the feeding roller 4 is fixedly installed at the top end of the movable slide rail 15, and sawtooth-shaped patterns are arranged on the inner surface of the clamping channel 18 and used for positioning and locking the feeding roller 4.

The centering adjusting device comprises a threaded shaft 5 arranged in the feeding roller 4, the right end of the threaded shaft 5 is rotatably connected to the fixed shaft 3, a knob 6 capable of controlling the threaded shaft 5 to rotate is fixedly arranged at the left end of the threaded shaft 5, and a folded edge is arranged on the circumference of the knob 6; the left end of the material placing roller 4 is provided with a bulge matched with the folded edge, the right end of the knob 6 is tightly attached to the left end of the material placing roller 4 and is connected with the material placing roller 4 through two semicircular connecting pieces 47, grooves are formed in the inner surfaces of the two semicircular connecting pieces 47, so that the knob 6 can rotate relative to the material placing roller 4 when the knob 6 is manually rotated, and the left end of the threaded shaft 5 is fixedly connected with the knob 6, and the right end of the threaded shaft 5 is rotatably connected to the fixed shaft 3, so that the threaded shaft 5 rotates along with the threaded shaft when the knob 6 is rotated; meanwhile, the knob 6 is arranged in the clamping channel 18, so that the emptying roller 4 can rotate relative to the knob 6.

The threaded shaft 5 is symmetrically provided with a fixed triangular claw component and a tightening claw component which can move reversely along the axial direction of the threaded shaft; the fixed triangular claw assembly comprises a fixed triangular claw shaft 7 movably connected to the left side of the threaded shaft 5, and three fixed triangular claws 8 are uniformly and fixedly installed on the circumference of the fixed triangular claw shaft 7; the elastic claw assembly comprises a group of elastic claw fixing inner rings 9 and elastic claw fixing outer rings 10 which are movably connected to the threaded shaft 5 and can move reversely in the axial direction of the threaded shaft, three elastic claws 11 are uniformly hinged to the circumferential direction of the elastic claw fixing inner rings 9, the tail ends of the elastic claws 11 are hinged to connecting rods 12, and one ends of the connecting rods 12 are hinged to the elastic claw fixing outer rings 10; two groups of rectangular strip-shaped first slotted holes 13 for fixing the triangular claws 8 and the elastic claws 11 to extend out are formed in the discharging roller 4;

the both ends at 5 centers of threaded shaft are positive and negative screw respectively, and when rotatory knob 6 made threaded shaft 5 rotate: the elastic claw fixing outer ring 10 moves leftwards, the elastic claw fixing inner ring 9 moves rightwards, the connecting rod 12 is driven to be vertically extended, and the elastic claw 11 is opened and tightly propped against the inner wall of the material belt winding cylinder; meanwhile, the fixed triangular claw shaft 7 moves leftwards, so that the fixed triangular claws 8 are clamped on the inner wall of the material belt winding drum together, the fixed triangular claws 8 mainly play a balance role, and the fixed triangular claws are matched with each other to realize the centering effect on a raw material belt. When the material belt is replaced, the knob 6 is rotated reversely, so that the elastic claw 11 can be retracted, and the material belt winding drum is convenient to take down from the discharging roller.

As shown in fig. 1, 11-15, the feeding device includes a set of rubber roller shaft brackets 24 symmetrically and fixedly installed at the left and right sides of the frame 1, and the rubber roller shaft brackets 24 are rotatably connected with a first rubber roller 25 and a second rubber roller 26 which are mutually matched; a third slotted hole 28 is formed in the rear end of the rubber roll shaft frame 24, a rubber roll shaft 27 of the second rubber roll 26 is rotatably connected in the third slotted hole 28 and can move left and right in the third slotted hole 28, a jackscrew 29 is fixedly installed at the right end inside the third slotted hole 28, and a pressure spring 30 is fixedly installed on the jackscrew 29; a connecting ring 31 is rotatably connected to the rubber roll shaft 27 of the second rubber roll 26, and one end of the pressure spring 30 is fixedly mounted on the connecting ring 31; the rubber roller shaft frame 24 is provided with a first motor 32 for driving the first rubber roller 25 to enable the first rubber roller 25 to rotate and drive the second rubber roller 26 to rotate so as to clamp and convey the material belt, and the second rubber roller 26 is connected with a pressure spring 30, when the second rubber roller 26 rotates, the reverse extrusion force of the material belt on the second rubber roller 26 enables the second rubber roller 26 to extrude the pressure spring 30 so as to move backwards, so that the distance between the second rubber roller 26 and the second rubber roller is increased, and the rubber roller shaft frame can be used for conveying the material belts with different thicknesses; the elastic restoring force of the pressure spring 30 enables the second rubber roller 26 to be in close contact with the material belt, and the problems of untight material clamping and insufficient tension are avoided.

The feeding device further comprises a first optical axis 19, a second optical axis 20, a third optical axis 21 and a tensioning roller set, wherein the first optical axis 19, the second optical axis 20, the third optical axis 21 and the tensioning roller set are fixedly mounted on the frame 1 and are parallel to each other, the first optical axis 19 is arranged right behind the discharging roller 4 and is parallel to the discharging roller 4, the second optical axis 20 is arranged right above the first optical axis 19, the third optical axis 21 is arranged right behind the second optical axis 20, the tensioning roller set inclining downwards is arranged below the second optical axis 20 and the third optical axis 21, the tensioning roller set is composed of three tensioning rollers 22 which are parallel to each other, and connecting side plates 23 are fixedly mounted at two ends of each tensioning roller 22 and are fixedly connected through the connecting side plates 23; the second optical axis 20 and the third optical axis 21 are respectively arranged at the front side and the rear side of the first rubber roller 25 and the second rubber roller 26 and are parallel to the front side and the rear side; through first optical axis 19, second optical axis 20, third optical axis 21 and tensioning roller 22, ensure that the material area is by abundant tensioning in the pay-off process, guarantee to pass the material area position accuracy among the cutting device, improve cross cutting efficiency.

The automatic feeding device is characterized in that a group of transmission rollers 33 which are parallel to the first rubber roller 25 and the second rubber roller 26 and are located below the first rubber roller and the second rubber roller are rotatably connected to the rack 1, a conveyor belt 35 used for conveying a material belt is arranged on the transmission rollers 33, a second motor 34 used for driving the transmission rollers 33 is installed on the rack 1, a group of support groups 36 used for supporting the conveyor belt 35 are fixedly installed on the rack 1, the support groups 36 are arranged between the upper conveyor belt 35 and the lower conveyor belt 35, a cavity is formed in the bottom of each support group 36, and the weight of each support group 36 can be reduced.

The free end in blowing cylinder 4 material loading area is earlier in proper order through first optical axis 19 and the tensioning of second optical axis 20, passes through first rubber roll 25 and the tractive of second rubber roll 26 again, then passes through tensioning roller 22 and the tensioning of third optical axis 21 once more, then continues conveying backward through conveyer belt 35, and the cross cutting device of being convenient for carries out the cross cutting.

As shown in fig. 1, 15-17, the die cutting device includes a set of slide rails 37 symmetrically installed on the left and right sides of the frame 1, the slide rails 37 are slidably connected with a first slide block 38, a moving platform 39 is fixedly installed at the lower end of the first slide block 38, the moving platform 39 is disposed above the conveyor belt 35, a third motor 40 is fixedly installed on the left side of the upper end of the moving platform 39, and a first synchronous pulley 41 is installed on the output shaft of the third motor 40; a second synchronous belt wheel 49 is arranged on the right side of the upper end of the moving platform 39 through a bracket, and a synchronous belt 42 is connected to the first synchronous belt wheel 41 and the second synchronous belt wheel 49; a knife rail 43 penetrates through the inner side of the moving platform 39, a second sliding block 44 is connected to the knife rail 43 in a sliding manner, the upper end of the second sliding block 44 is fixedly connected with a synchronous belt 42 and can move left and right along the knife rail 43 under the driving of the synchronous belt 42, and a cutting knife 45 is fixedly installed at the bottom end of the second sliding block 44; the third motor 40 rotates forward and backward repeatedly to drive the first synchronous belt pulley 41 to rotate and drive the second synchronous belt pulley 49 to rotate through the synchronous belt 42 to further drive the synchronous belt 42 to drive the second sliding block 44 to move left and right in a reciprocating manner, and then the cutting knife 45 cuts the material belt to complete die cutting;

preferably, knife rests 46 are fixedly mounted on two sides of the bottom end of the movable platform 39 and can move back and forth along with the movable platform 39, so that the material belts in the moving range of the cutting scissors 45 are fixed, and the die cutting position is more accurate.

The working principle of the utility model is as follows:

firstly, mounting a processing material belt on a discharging roller 4, rotating a threaded shaft 5 through a knob 6, clamping a tightening claw 11 on the inner wall of a material belt winding drum, and positioning the material belt winding drum together with a fixed triangular claw 8; then, the movable slide rail 15 moves forwards to enable the knob 6 to be clamped in the clamping channel 18, the free end of the material strap on the material placing roller 4 is tensioned through the first optical axis 19 and the second optical axis 20 in sequence, then the first motor 32 is started to drive the first rubber roller 25 to rotate and drive the second rubber roller 26 to rotate, the first rubber roller and the second rubber roller combine to pull the material strap, the material strap is conveyed backwards, the material strap passes through the third optical axis 21 and the tensioning roller 22 to be tensioned for the second time, and the position accuracy of the material strap during subsequent die cutting is further ensured; then the sliding rail 37 is matched with the first sliding block 38, and the moving platform 39 is adjusted to a required position and then fixed; finally, the third motor 40 rotates forward and backward repeatedly to drive the first synchronous pulley 41 to rotate and drive the second synchronous pulley 49 to rotate through the synchronous belt 42 to further drive the synchronous belt 42 to drive the second sliding block 44 to move left and right in a reciprocating manner, so that the cutting knife 45 cuts the material belt to complete the die cutting.

Claims (10)

1. The die-cutting machine with the self-centering device is characterized by comprising a machine frame (1), wherein a loading device, a centering adjusting device, a feeding device and a die-cutting device are arranged on the machine frame (1);

the material loading device comprises a bearing seat (2) fixedly arranged on the right side of the rack (1), a fixed shaft (3) is rotatably connected to the bearing seat (2), a hollow discharging roller (4) is fixedly arranged at the left end of the fixed shaft (3), and the left end of the discharging roller (4) is rotatably and detachably arranged on the left side of the rack (1);

the centering adjusting device comprises a threaded shaft (5) arranged in the feeding roller (4), the left end of the threaded shaft (5) is rotatably connected to the fixed shaft (3), a knob (6) capable of controlling the threaded shaft (5) to rotate is fixedly installed at the left end of the threaded shaft (5), and the knob (6) is rotatably connected to the feeding roller (4);

the threaded shaft (5) is symmetrically provided with a fixed triangular claw component and a tightening claw component which can move reversely along the axial direction of the threaded shaft; the fixed triangular claw assembly comprises a fixed triangular claw shaft (7) movably connected to the left side of the threaded shaft (5), and three fixed triangular claws (8) are uniformly and fixedly installed on the circumferential direction of the fixed triangular claw shaft (7);

the tightening claw assembly comprises a tightening claw fixing inner ring (9) and a tightening claw fixing outer ring (10), wherein the tightening claw fixing inner ring (9) and the tightening claw fixing outer ring (10) are movably connected to the threaded shaft (5) and can move in the axial direction in the opposite direction, three tightening claws (11) are uniformly hinged to the circumferential direction of the tightening claw fixing inner ring (9), the tail ends of the tightening claws (11) are hinged to connecting rods (12), and one ends of the connecting rods (12) are hinged to the tightening claw fixing outer ring (10);

two groups of rectangular strip-shaped first slotted holes (13) used for fixing the triangular claws (8) and the elastic claws (11) to extend out are formed in the discharging roller (4) so that the discharging roller can be clamped on the inner wall of the material belt winding drum.

2. The die cutting machine with the self-centering device according to claim 1, wherein the material loading device further comprises a static slide rail (14) fixedly mounted on the frame (1), a movable slide rail (15) is connected to the static slide rail (14) in a sliding manner, a strip-shaped second slotted hole (16) is formed in the movable slide rail (15), and a fastening bolt (17) for fixing the movable slide rail (15) is mounted in the second slotted hole (16);

the top end of the movable sliding rail (15) is fixedly provided with a U-shaped clamping channel (18) for fixing the left end of the feeding roller (4).

3. The die cutting machine with the self-centering device according to claim 1 or 2, characterized in that the feeding device comprises a group of rubber roller shaft brackets (24) which are symmetrically and fixedly installed at the left side and the right side of the frame (1), and a first rubber roller (25) and a second rubber roller (26) which are matched with each other are rotatably connected to the rubber roller shaft brackets (24);

a third slotted hole (28) is formed in the rear end of the rubber roller shaft frame (24), a rubber roller shaft (27) of the second rubber roller (26) is rotatably connected in the third slotted hole (28) and can move back and forth in the third slotted hole (28), a jackscrew (29) is fixedly installed at the rear end inside the third slotted hole (28), and a pressure spring (30) is fixedly installed on the jackscrew (29); a connecting ring (31) is rotatably connected to a rubber roll shaft (27) of the second rubber roll (26), and one end of a pressure spring (30) is fixedly arranged on the connecting ring (31);

the rubber roller shaft frame (24) is provided with a first motor (32) for driving the first rubber roller (25) to enable the first rubber roller (25) to rotate and drive the second rubber roller (26) to rotate so as to clamp and convey the material belt;

a group of transmission rollers (33) which are parallel to the first rubber roller (25) and the second rubber roller (26) and are positioned below the first rubber roller and the second rubber roller are rotatably connected to the rack (1), and a conveyor belt (35) for conveying a material belt is arranged on the transmission rollers (33); and a second motor (34) for driving the transmission roller (33) is arranged on the frame (1).

4. The die cutting machine with the self-centering device according to claim 3, characterized in that the feeding device further comprises a first optical axis (19), a second optical axis (20), a third optical axis (21) and a tensioning roller set which are fixedly mounted on the frame (1) and parallel to each other, the first optical axis (19) is arranged right behind the discharging roller (4) and parallel to the discharging roller (4), the second optical axis (20) is arranged right above the first optical axis (19), the third optical axis (21) is arranged right behind the second optical axis (20), the tensioning roller set inclined downwards is arranged below the second optical axis (20) and the third optical axis (21), the tensioning roller set is composed of three tensioning rollers (22) which are parallel to each other, and connecting side plates (23) are fixedly mounted at two ends of the tensioning rollers (22);

the second optical axis (20) and the third optical axis (21) are respectively arranged on the front side and the rear side of the first rubber roller (25) and the second rubber roller (26) and are parallel to the first rubber roller and the second rubber roller.

5. The die cutting machine with the self-centering device according to claim 4, wherein the die cutting device comprises a set of slide rails (37) symmetrically arranged on the left side and the right side of the machine frame (1), the slide rails (37) are connected with a first slide block (38) in a sliding manner, the lower end of the first slide block (38) is fixedly provided with a movable platform (39), the movable platform (39) is arranged above the conveyor belt (35), the left side of the upper end of the movable platform (39) is fixedly provided with a third motor (40), and an output shaft of the third motor is provided with a first synchronous belt pulley (41);

a second synchronous pulley (49) is mounted on the right side of the upper end of the moving platform (39) through a support, and a synchronous belt (42) is connected to the first synchronous pulley (41) and the second synchronous pulley (49);

the inner side of the moving platform (39) is provided with a knife rail (43) in a penetrating mode, the knife rail (43) is connected with a second sliding block (44) in a sliding mode, the upper end of the second sliding block (44) is fixedly connected with a synchronous belt (42) and can move left and right along the knife rail (43) under the driving of the synchronous belt (42), and the bottom end of the second sliding block (44) is fixedly provided with a cutting knife (45).

6. The die cutting machine with self-centering device according to claim 4, characterized in that a set of brackets (36) for supporting the conveyor belt (35) is fixedly mounted on the machine frame (1).

7. The die cutting machine with the self-centering device according to claim 1 or 2, characterized in that the right end of the discharging roller (4) is connected with the knob (6) through two semicircular connecting pieces (47) so that the knob (6) can rotate relative to the discharging roller (4) to drive the threaded shaft (5) to rotate.

8. Die cutting machine with self-centering device according to claim 2, characterized in that the inner surface of the lane (18) is provided with a saw-tooth pattern.

9. The die cutting machine with self-centering device according to claim 5, characterized in that a tool holder (46) is fixedly mounted on both sides of the bottom end of the movable platform (39).

10. The die cutting machine with the self-centering device according to claim 6, characterized in that a cavity (48) is formed at the bottom of the bracket set (36).

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