CN210025861U

CN210025861U - Follow-on slitter

Info

Publication number: CN210025861U
Application number: CN201822077095.3U
Authority: CN
Inventors: 翟小荣; 刘洋
Original assignee: Tianjin China Boson New Materials Co Ltd
Current assignee: Tianjin China Boson New Materials Co Ltd
Priority date: 2018-12-12
Filing date: 2018-12-12
Publication date: 2020-02-07
Anticipated expiration: 2028-12-12

Abstract

The utility model provides an improved slitting machine, which comprises a mounting plate, a mounting pipe, a supporting rod, an adjusting bolt, a connecting plate, a buffering and clamping frame structure, an adjustable protective cover structure, a mounting block, a motor, a cutting wheel, a connecting pipe, a connecting rod, a cutting blade, a fixing sheet, a cutting control switch and a lifting control switch, wherein the mounting pipe is connected to the left side of the upper surface of the mounting plate through a bolt; the supporting rod is longitudinally inserted at the upper part of the mounting pipe; the adjusting bolt is in threaded connection with the connecting part of the mounting pipe and the support rod. The utility model discloses the guard plate, the cylinder, splint, place the board, the backing sheet, the inserted link, stop plate, the guard tube, the inserted link, stop plate and buffering spring's setting, be favorable to carrying out the centre gripping to the article of variation in size; supporting shoe, dead lever, pivot, fastening bolt, protection casing, fixed pipe, protection rod, the setting of connection piece and protection spring is favorable to protecting the article that needs the cutting.

Description

Follow-on slitter

Technical Field

The utility model belongs to the technical field of mechanical equipment, especially, relate to an improved generation's slitter.

Background

In the production process of a TFT (thin film transistor) glass substrate liquid crystal glass substrate, a slitting machine is required to transversely or longitudinally cut the glass substrate to ensure that the size of the glass substrate is a specified size.

The slitter drives a cutter head fixedly connected with a screw nut to slide along a guide rail in a guide rail pair by the movement of the screw nut of the screw rod pair along the screw rod, so that the scribing and cutting are carried out on the glass substrate, the size of the glass substrate is increased along with the continuous upgrading and updating of the glass substrate, the travel of the cutter head in the guide rail of the frame is increased, however, each part of the slitting machine is generally not parallel to the guide rail and the lead screw due to machining tolerance and assembly error, therefore, in the process that the nut drives the cutter head to move along the screw rod for a long stroke, interaction force exists between the nut of the screw rod pair and the screw rod and between the guide rail of the guide rail pair and the sliding block, so that the cutter head does not move smoothly and generates vibration, and the abrasion between the guide rail pair and the screw rod pair is accelerated, thereby the life of guide rail pair and screw pair has been reduced, and then the life of slitter has been shortened.

The Chinese patent publication No. CN205816925U discloses a slitting machine, which comprises a frame, wherein a guide rail pair and a lead screw pair are arranged on the frame, the guide rail pair comprises a guide rail and a sliding block connected on the guide rail in a sliding manner, and the lead screw pair comprises a lead screw and a nut rotationally connected on the lead screw; the tool bit is connected with the sliding block; the cutter head is movably connected with the nut, and the distance between the nut and the cutter head is variable; when the screw nut moves along the lead screw, the screw nut drives the cutter head to slide along the guide rail through the sliding block. However, the existing slitting machine also has the problems that the articles with different sizes are not convenient to clamp, the protection effect is poor and the slitting can not be carried out according to the required sizes of the articles.

Therefore, it is necessary to develop an improved slitting machine.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides an improved generation slitter to solve the article of the inconvenient centre gripping variation in size of current slitter, the problem of cutting is carried out to the size that protecting effect is poor and can not be according to article needs. An improved slitting machine comprises a mounting plate, a mounting pipe, a supporting rod, an adjusting bolt, a connecting plate, a buffering and clamping frame structure, an adjustable protective cover structure, a mounting block, a motor, a cutting wheel, a connecting pipe, a connecting rod, a cutting piece, a fixing piece, a cutting control switch and a lifting control switch, wherein the mounting pipe is connected to the left side of the upper surface of the mounting plate through the bolt; the supporting rod is longitudinally inserted at the upper part of the mounting pipe; the adjusting bolt is in threaded connection with the connecting part of the mounting pipe and the support rod; the connecting plate is connected to the upper part of the support rod through a bolt; the structure of the buffering clamping frame is arranged in the middle of the upper surface of the mounting plate; the adjustable protective cover structure is connected to the right side of the bottom of the connecting plate through bolts; the mounting block is connected to the left side of the bottom of the connecting plate through a bolt; the motor is connected to the lower part of the mounting block through a bolt; the cutting wheel key is connected to an output shaft of the motor; the connecting pipe is glued at the middle position on the right side of the cutting wheel; the connecting rod is transversely tied at the right side in the connecting pipe; the cutting blade is connected to the right side of the connecting rod through a bolt; the fixing sheet is embedded in the middle of the right side of the front surface of the mounting plate; the cutting control switch and the lifting control switch are sequentially embedded in the middle of the front surface of the fixing sheet from left to right; the clamping frame structure capable of buffering comprises a protection plate, an air cylinder, a clamping plate, a placing plate, a support plate, an inserting rod, a blocking plate, a protection pipe, an inserting rod, a blocking piece and a buffering spring, wherein the air cylinder is connected to the middle position of the upper surface of the protection plate through a bolt; the clamping plate is connected to the left side of the inserted rod through a bolt; the placing plate is connected to the upper part of the cylinder through bolts; the supporting sheet is connected to the left side of the upper surface of the placing plate through bolts; the inserting rod is connected to the middle position of the right side of the supporting sheet through a bolt; the stop plate is connected to the right side of the upper surface of the placing plate through bolts; the protective pipe is connected to the left side of the blocking plate through a bolt; the inserted bar is longitudinally inserted at the left side in the protective tube; the blocking piece is connected to the right side of the inserted rod through a bolt; one end of the buffer spring is welded on the right side inside the protective tube, and the other end of the buffer spring is welded on the right side of the barrier sheet.

Preferably, a nylon limiting rope is arranged at the joint of the mounting pipe and the inner side of the support rod; one end of the nylon limiting rope is connected to the lower portion of the inner side of the mounting pipe in an adhesive mode, and the other end of the nylon limiting rope is connected to the lower portion of the supporting rod in an adhesive mode.

Preferably, a fixing bolt is arranged at the joint of the connecting pipe and the connecting rod; and a rubber ring is arranged at the joint of the connecting pipe and the outer side of the connecting rod.

Preferably, the bottom of the mounting plate is glued with a silica gel anti-slip pad with the thickness of two to four millimeters; the bottom of the silica gel anti-slip mat is provided with a straight-line-shaped anti-slip line.

Preferably, the left side of the clamping plate is glued with a rubber pad; PVC plastic sheets with the thickness of one to three millimeters are embedded on the inner sides of the rubber pads.

Preferably, the magnet piece with the thickness of one millimeter to three millimeters is glued on the upper surface of the placing plate; the outer surface of the magnet piece is embedded with a rubber layer with the thickness of one millimeter to three millimeters.

Preferably, the buffer spring is a stainless steel spring; the outer surface of the buffer spring is embedded with a PVC plastic layer; the diameter of the buffer spring is set to be ten millimeters to fourteen millimeters.

Preferably, the adjustable protective cover structure comprises a supporting block, a fixing rod, a rotating shaft, a fastening bolt, a protective cover, a fixing pipe, a protective rod, a connecting sheet and a protective spring, wherein the fixing rod is connected to the left side of the front surface of the supporting block through the rotating shaft; the fastening bolt is in threaded connection with the connecting position of the supporting block and the rotating shaft; the protective cover is connected to the lower part of the fixed rod through a bolt; the fixed pipe is connected to the right side of the bottom of the supporting block through a bolt; one end of the protection rod is transversely inserted into the left side of the inside of the fixed pipe, and the other end of the protection rod is connected to the middle position of the right side of the fixed rod through a bolt; the connecting piece is connected to the right side of the protective rod through a bolt; one end of the protection spring is welded on the right side inside the fixed pipe, and the other end of the protection spring is welded on the right side of the connecting sheet.

Preferably, a rubber ring is arranged at the joint of the supporting block and the rotating shaft; the rubber ring is embedded on the outer wall of the rotating shaft; the diameter of the rotating shaft is set to be ten millimeters to twelve millimeters.

Preferably, the protective cover is an arc acrylic plastic cover; the outer surface of the protective cover is embedded with a rubber layer.

Preferably, the diameter of the protection spring is set to be twelve millimeters to sixteen millimeters; the protection spring is a cylindrical stainless steel spring; the outer part of the protection spring and the lower part of the protection spring are respectively glued with a stainless steel ring with the diameter of two millimeters to four millimeters; the outer surface of the stainless steel ring is embedded with a rubber layer; and the outer surface of the protection spring is coated with an anti-rust paint layer.

Preferably, the protection plate is connected with the mounting plate through bolts.

Preferably, the supporting block is connected with the connecting plate through bolts.

Preferably, the cutting control switch is electrically connected with the motor; the lifting control switch is electrically connected with the air cylinder.

Preferably, the cutting control switch and the lifting control switch are switches with the model number of SB16 respectively; the motor is a YL type motor; the cylinder is particularly an SC125 type cylinder.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model discloses in, guard plate, cylinder, splint, place the board, the backing sheet, the inserted bar, the barrier plate, the protecting tube, the inserted bar blocks the setting of piece and buffering spring, is favorable to carrying out the centre gripping to the article of variation in size.

2. The utility model discloses in, supporting shoe, dead lever, pivot, fastening bolt, protection casing, fixed pipe, the setting of protection pole, connection piece and protection spring is favorable to protecting the article that needs the cutting.

3. The utility model discloses in, the cutting wheel, the connecting pipe, the setting of connecting rod and cutting piece are favorable to cutting the article of size difference.

4. In the utility model, the connecting part of the mounting tube and the inner side of the support rod is provided with a nylon spacing rope; one end of the nylon limiting rope is glued to the lower portion of the inner side of the mounting pipe, and the other end of the nylon limiting rope is glued to the lower portion of the supporting rod, so that the supporting rod can be prevented from falling off from the inner side of the mounting pipe.

5. In the utility model, a fixed bolt is arranged at the joint of the connecting pipe and the connecting rod; the junction outside connecting pipe and the connecting rod be provided with the rubber circle, be favorable to increasing the fixity between connecting pipe and the connecting rod.

6. In the utility model, the buffer spring is a stainless steel spring; the outer surface of the buffer spring is embedded with a PVC plastic layer; the diameter of the buffer spring is set to be ten millimeters to fourteen millimeters, so that the buffer spring is prevented from rusting and breaking.

Drawings

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

Fig. 2 is a schematic structural view of the structure of the buffering holding frame of the present invention.

Fig. 3 is a schematic structural diagram of the adjustable protective cover structure of the present invention.

In the figure:

1. mounting a plate; 2. installing a pipe; 3. a strut; 4. adjusting the bolt; 5. a connecting plate; 6. a buffer clamping frame structure; 61. a protection plate; 62. a cylinder; 63. a splint; 64. placing the plate; 65. a support sheet; 66. a plug rod; 67. a blocking plate; 68. a protective tube; 69. inserting a rod; 610. a blocking sheet; 611. a buffer spring; 7. the structure of the protective cover can be adjusted; 71. a support block; 72. fixing the rod; 73. a rotating shaft; 74. fastening a bolt; 75. a protective cover; 76. a fixed tube; 77. a guard bar; 78. connecting sheets; 79. a protection spring; 8. mounting blocks; 9. a motor; 10. a cutting wheel; 11. a connecting pipe; 12. a connecting rod; 13. cutting the slices; 14. a fixing sheet; 15. a cutting control switch; 16. a lifting control switch.

Detailed Description

The invention is further described below with reference to the accompanying drawings:

example (b):

as shown in figures 1 to 3

The utility model provides an improved slitting machine, which comprises a mounting plate 1, a mounting pipe 2, a support rod 3, an adjusting bolt 4, a connecting plate 5, a buffering and clamping frame structure 6, an adjustable protective cover structure 7, a mounting block 8, a motor 9, a cutting wheel 10, a connecting pipe 11, a connecting rod 12, a cutting piece 13, a fixing piece 14, a cutting control switch 15 and a lifting control switch 16, wherein the mounting pipe 2 is connected with the left side of the upper surface of the mounting plate 1 through a bolt; the supporting rod 3 is longitudinally inserted at the upper part of the mounting pipe 2; the adjusting bolt 4 is in threaded connection with the connecting part of the mounting pipe 2 and the support rod 3; the connecting plate 5 is connected to the upper part of the supporting rod 3 through bolts; the buffering clamping frame structure 6 is arranged in the middle of the upper surface of the mounting plate 1; the adjustable protective cover structure 7 is connected to the right side of the bottom of the connecting plate 5 through bolts; the mounting block 8 is connected to the left side of the bottom of the connecting plate 5 through a bolt; the motor 9 is connected to the lower part of the mounting block 8 through a bolt; the cutting wheel 10 is connected with the output shaft of the motor 9 in a key way; the connecting pipe 11 is glued at the middle position of the right side of the cutting wheel 10; the connecting rod 12 is transversely tied at the right side inside the connecting pipe 11; the cutting blade 13 is connected to the right side of the connecting rod 12 through a bolt; the fixing sheet 14 is embedded in the middle position of the right side of the front surface of the mounting plate 1; the cutting control switch 15 and the lifting control switch 16 are sequentially embedded in the middle of the front surface of the fixing sheet 14 from left to right; the buffering clamping frame structure 6 comprises a protection plate 61, an air cylinder 62, a clamping plate 63, a placing plate 64, a supporting plate 65, an inserting rod 66, a blocking plate 67, a protection pipe 68, an inserting rod 69, a blocking plate 610 and a buffering spring 611, wherein the air cylinder 62 is connected to the middle position of the upper surface of the protection plate 61 through a bolt; the clamping plate 63 is connected to the left side of the insert rod 69 through a bolt; the placing plate 64 is connected to the upper part of the air cylinder 62 through bolts; the supporting plate 65 is bolted on the left side of the upper surface of the placing plate 64; the insertion rod 66 is connected to the middle position of the right side of the supporting sheet 65 through a bolt; the blocking plate 67 is bolted on the right side of the upper surface of the placing plate 64; the protective pipe 68 is connected to the left side of the blocking plate 67 through a bolt; the inserting rod 69 is longitudinally inserted into the left side of the inner part of the protective tube 68; the stop piece 610 is bolted on the right side of the insert rod 69; one end of the buffer spring 611 is welded at the right side of the interior of the protection tube 68, and the other end is welded at the right side of the stop plate 610.

In the above embodiment, specifically, a nylon stopper rope is arranged at the joint between the inner sides of the mounting tube 2 and the strut 3; one end of the nylon limiting rope is glued to the lower part of the inner side of the mounting pipe 2, and the other end of the nylon limiting rope is glued to the lower part of the supporting rod 3.

In the above embodiment, specifically, a fixing bolt is arranged at the joint of the connecting pipe 11 and the connecting rod 12; and a rubber ring is arranged at the joint of the outer sides of the connecting pipe 11 and the connecting rod 12.

In the above embodiment, specifically, the bottom of the mounting plate 1 is glued with a silica gel anti-slip pad with a thickness of two to four millimeters; the bottom of the silica gel anti-slip mat is provided with a straight-line-shaped anti-slip line.

In the above embodiment, specifically, a rubber pad is glued to the left side of the clamping plate 63; PVC plastic sheets with the thickness of one to three millimeters are embedded on the inner sides of the rubber pads.

In the above embodiment, specifically, the magnet pieces with a thickness of one mm to three mm are glued on the upper surface of the placing plate 64; the outer surface of the magnet piece is embedded with a rubber layer with the thickness of one millimeter to three millimeters.

In the above embodiment, specifically, the buffer spring 611 specifically adopts a stainless steel spring; a PVC plastic layer is embedded on the outer surface of the buffer spring 611; the diameter of the buffer spring 611 is set to be ten mm to fourteen mm.

In the above embodiment, specifically, the adjustable shield structure 7 includes a supporting block 71, a fixing rod 72, a rotating shaft 73, a fastening bolt 74, a shield 75, a fixing tube 76, a shielding rod 77, a connecting piece 78 and a shielding spring 79, wherein the fixing rod 72 is connected to the left side of the front surface of the supporting block 71 through the rotating shaft 73; the fastening bolt 74 is in threaded connection with the connection position of the supporting block 71 and the rotating shaft 73; the protective cover 75 is connected to the lower part of the fixed rod 72 through bolts; the fixed pipe 76 is connected to the right side of the bottom of the supporting block 71 through a bolt; one end of the protective rod 77 is transversely inserted into the left side of the inner part of the fixed pipe 76, and the other end of the protective rod is connected to the middle position of the right side of the fixed rod 72 through a bolt; the connecting piece 78 is connected to the right side of the guard bar 77 through bolts; one end of the protection spring 79 is welded at the right side in the fixed pipe 76, and the other end is welded at the right side of the connecting piece 78.

In the above embodiment, specifically, a rubber ring is arranged at the joint of the supporting block 71 and the rotating shaft 73; the rubber ring is embedded on the outer wall of the rotating shaft 73; the diameter of the rotating shaft 73 is set to be ten mm to twelve mm.

In the above embodiment, specifically, the protective cover 75 specifically adopts an arc-shaped acrylic plastic cover; the outer surface of the protective cover 75 is embedded with a rubber layer.

In the above embodiment, specifically, the diameter of the protection spring 79 is set to be twelve millimeters to sixteen millimeters; the protection spring 79 is a cylindrical stainless steel spring; the outer part of the protection spring 79 and the lower part of the protection spring 79 are respectively glued with stainless steel rings with the diameter of two millimeters to four millimeters; the outer surface of the stainless steel ring is embedded with a rubber layer; the outer surface of the protection spring 79 is coated with an anti-rust paint layer.

In the above embodiment, specifically, the protection plate 61 is connected to the mounting plate 1 by bolts.

In the above embodiment, specifically, the supporting block 71 is connected with the connecting plate 5 by bolts.

In the above embodiment, specifically, the cutting control switch 15 is electrically connected to the motor 9; the lifting control switch 16 is electrically connected to the cylinder 62.

In the above embodiment, specifically, the cutting control switch 15 and the lifting control switch 16 are switches of SB16 type respectively; the motor 9 is a motor with a model of YL type; the cylinder 62 is a type SC125 cylinder.

Principle of operation

When the utility model is used, firstly, a slitter is placed on a workbench in a workshop, then one end of an object to be cut is fixed on the inserting rod 66, then a hand presses the clamp plate 63 rightwards, then the object to be cut is in a horizontal state, then the clamp plate 63 is loosened to enable the buffer spring 611 to drive the clamp plate 63 to recover to the original position, then the clamp plate 63 is utilized to be matched with the inserting rod 66 to clamp the object to be cut, then bolts between the connecting pipe 11 and the connecting rod 12 are loosened according to different sizes of the object to be cut, the bolts between the connecting pipe 11 and the connecting rod 12 are screwed down again after finishing adjustment, then an external power supply is connected, then the cutting control switch 15 is pressed to start the motor 9 to drive the cutting wheel 10 and the cutting blade 13 to rotate, then the lifting control switch 16 is pressed to start the cylinder 62, then the cylinder 62 is utilized to drive the object on the, the cutting wheel 10 and the cutting blade 13 are utilized to cut the object on the placing plate 64, the protective cover 75 is utilized to protect the object to be cut in the process of cutting the object, the angle of the protective cover 75 can be adjusted by loosening the fastening bolt 74, and the fastening bolt 74 is screwed again after the adjustment is finished.

Utilize technical scheme, or technical personnel in the field are in the utility model discloses under technical scheme's the inspiration, design similar technical scheme, and reach above-mentioned technological effect, all fall into the utility model discloses a protection scope.

Claims

1. The improved slitting machine is characterized by comprising a mounting plate (1), a mounting pipe (2), a supporting rod (3), an adjusting bolt (4), a connecting plate (5), a buffering and clamping frame structure (6), an adjustable protective cover structure (7), a mounting block (8), a motor (9), a cutting wheel (10), a connecting pipe (11), a connecting rod (12), a cutting sheet (13), a fixing sheet (14), a cutting control switch (15) and a lifting control switch (16), wherein the mounting pipe (2) is in bolted connection with the left side of the upper surface of the mounting plate (1); the supporting rod (3) is longitudinally inserted at the upper part of the mounting pipe (2); the adjusting bolt (4) is in threaded connection with the connecting part of the mounting pipe (2) and the support rod (3); the connecting plate (5) is connected to the upper part of the supporting rod (3) through bolts; the clamping frame structure (6) capable of buffering is arranged in the middle of the upper surface of the mounting plate (1); the adjustable protective cover structure (7) is connected to the right side of the bottom of the connecting plate (5) through bolts; the mounting block (8) is connected to the left side of the bottom of the connecting plate (5) through a bolt; the motor (9) is connected to the lower part of the mounting block (8) through a bolt; the cutting wheel (10) is connected to the output shaft of the motor (9) in a key way; the connecting pipe (11) is glued at the middle position of the right side of the cutting wheel (10); the connecting rod (12) is transversely tied at the right side in the connecting pipe (11); the cutting blade (13) is connected to the right side of the connecting rod (12) through a bolt; the fixing sheet (14) is embedded in the middle position of the right side of the front surface of the mounting plate (1); the cutting control switch (15) and the lifting control switch (16) are sequentially embedded in the middle of the front surface of the fixing sheet (14) from left to right; the clamping frame structure (6) capable of buffering comprises a protection plate (61), an air cylinder (62), a clamping plate (63), a placing plate (64), a support plate (65), an inserting rod (66), a blocking plate (67), a protection pipe (68), an inserting rod (69), a blocking sheet (610) and a buffering spring (611), wherein the air cylinder (62) is connected to the middle position of the upper surface of the protection plate (61) through a bolt; the clamping plate (63) is connected to the left side of the insert rod (69) through a bolt; the placing plate (64) is connected to the upper part of the cylinder (62) through bolts; the supporting piece (65) is connected to the left side of the upper surface of the placing plate (64) through bolts; the inserting rod (66) is connected to the middle position of the right side of the supporting sheet (65) through a bolt; the blocking plate (67) is connected to the right side of the upper surface of the placing plate (64) through bolts; the protective pipe (68) is connected to the left side of the blocking plate (67) through a bolt; the insert rod (69) is longitudinally inserted at the left side inside the protective tube (68); the blocking piece (610) is connected to the right side of the insert rod (69) through a bolt; one end of the buffer spring (611) is welded at the right side in the protective tube (68), and the other end of the buffer spring is welded at the right side of the barrier sheet (610).

2. The improved slitting machine as claimed in claim 1, wherein the connection between the mounting tube (2) and the inside of the supporting rod (3) is provided with a nylon stopper rope; one end of the nylon limiting rope is connected to the lower part of the inner side of the mounting pipe (2) in a glued mode, and the other end of the nylon limiting rope is connected to the lower part of the supporting rod (3) in a glued mode.

3. The improved slitting machine as claimed in claim 1, characterized in that the joints of the connecting pipes (11) and the connecting rods (12) are provided with fixing bolts; and a rubber ring is arranged at the joint of the outer sides of the connecting pipe (11) and the connecting rod (12).

4. The improved slitting machine as claimed in claim 1, wherein the bottom of the mounting plate (1) is glued with a silica gel non-slip mat with a thickness of two to four millimeters; the bottom of the silica gel anti-slip mat is provided with a straight-line-shaped anti-slip line.

5. The improved slitting machine as claimed in claim 1, wherein the left side of the clamping plate (63) is glued with a rubber pad; PVC plastic sheets with the thickness of one to three millimeters are embedded on the inner sides of the rubber pads.

6. The improved slitter in accordance with claim 1, wherein the upper surface of the placing plate (64) is glued with a magnet piece with a thickness of one to three mm; the outer surface of the magnet piece is embedded with a rubber layer with the thickness of one millimeter to three millimeters.

7. The improved slitting machine as claimed in claim 1, wherein said damping spring (611) is embodied as a stainless steel spring; a PVC plastic layer is embedded on the outer surface of the buffer spring (611); the diameter of the buffer spring (611) is set to be ten millimeters to fourteen millimeters.

8. The improved slitting machine as claimed in claim 1, wherein said adjustable guard structure (7) comprises a support block (71), a fixing rod (72), a rotating shaft (73), a fastening bolt (74), a guard (75), a fixing tube (76), a guard rod (77), a connecting piece (78) and a guard spring (79), said fixing rod (72) being connected to the left side of the front surface of the support block (71) through the rotating shaft (73); the fastening bolt (74) is in threaded connection with the connection position of the supporting block (71) and the rotating shaft (73); the protective cover (75) is connected to the lower part of the fixing rod (72) through bolts; the fixed pipe (76) is connected to the right side of the bottom of the supporting block (71) through a bolt; one end of the protective rod (77) is transversely inserted into the left side of the inside of the fixed pipe (76), and the other end of the protective rod is connected to the middle position of the right side of the fixed rod (72) through a bolt; the connecting piece (78) is connected to the right side of the guard rod (77) through a bolt; one end of the protection spring (79) is welded on the right side in the fixed pipe (76), and the other end of the protection spring is welded on the right side of the connecting sheet (78).

9. The improved slitting machine as claimed in claim 8, wherein the joints of the supporting blocks (71) and the rotating shafts (73) are provided with rubber rings; the rubber ring is embedded on the outer wall of the rotating shaft (73); the diameter of the rotating shaft (73) is set to be ten millimeters to twelve millimeters.

10. The improved slitting machine as claimed in claim 8, wherein the protective cover (75) is embodied as an arc-shaped acrylic plastic cover; the outer surface of the protective cover (75) is embedded with a rubber layer.