Plastic cutting equipment

Abstract

The present invention belongs to the field of cutting technology, and specifically is a plastic cutting device, comprising: a workbench; two mounting frames fixedly connected to the top of the workbench; a lifting plate slidably connected to the two mounting frames; by placing a plastic pipe through a feeding roller and a limiting roller, when the plastic pipe passes through an infrared sensor, the infrared sensor monitors the length of the plastic pipe conveyed in real time; when the infrared sensor detects a predetermined length, a signal is transmitted to a computer end, and a second motor and a driving motor are controlled by a computer program, and the driving motor is turned off to stop the feeding of the plastic pipe; the second motor drives the first bidirectional screw rod to rotate, and drives the arc clamping plate to move toward the center at the same time through the first bidirectional screw rod, until the arc clamping plate clamps and fixes the plastic pipe to prevent the plastic pipe from continuing to move forward under the action of inertia; the plastic pipe remains stable under the action of the limiting roller, the feeding roller and the arc clamping plate, and then the first electric push rod drives the cutting knife to cut the plastic pipe, thereby realizing the functions of cutting and feeding coordination.

Description

Technical Field

[0001] The invention belongs to the field of cutting technology, in particular to a plastic cutting device. Background Art

[0002] Plastic pipes are generally made of synthetic resin, that is, polyester as raw material, with the addition of stabilizers, lubricants, plasticizers, etc., and are extruded in a pipe making machine using the "plastic" method. Plastic pipes are an important component of chemical building materials and are widely accepted for their superior performance, hygiene, environmental protection, and low consumption. The main types include UPVC drainage pipes, UPVC water supply pipes, aluminum-plastic composite pipes, polyethylene water supply pipes, and polypropylene PPR hot water pipes. In the production of plastic pipes, the pipes need to be cut so that the pipes can be used more reasonably.

[0003] A Chinese patent with publication number CN211806400U discloses a high-efficiency plastic pipe cutting device, which includes a cutting device fixing frame, a plastic pipe sliding assisting member, a feed fixed sliding adjustment device, an anti-swaying plastic pipe fastener, a fastening adjustment device, a high-efficiency cutting device, a fastening cutting auxiliary discharging device and a discharging sliding assisting member; by placing the plastic pipe to be cut on the plastic pipe sliding assisting member, starting the feeding motor, the feeding motor drives the feeding screw to rotate, the feeding screw drives the lower sliding fastener to move, the lower sliding fastener moves to drive the fastening adjustment device and the upper sliding fastener to move. The upper sliding fastener moves toward the direction close to the lower sliding fastener, thereby fastening the plastic pipe between the upper sliding fastener and the lower sliding fastener. The height adjustment motor is started, and the height adjustment motor drives the height adjustment screw to rotate. The height adjustment screw drives the cutting sliding fixed rod to move. The movement of the cutting sliding fixed rod drives the high-efficiency cutting knife to move. The cutting motor is started to perform the cutting operation.

[0004] In the above technology, when the plastic pipe needs to be cut, it is usually necessary to cut the longer plastic pipe into pipe sections of fixed size. The conveying roller feeds the pipe through the feeding screw, fixes it through the upper sliding fastener and the lower sliding fastener, and then cuts it. However, since feeding and cutting are two processes, if there is no limit between feeding and cutting, the plastic pipe will be affected by friction or external force during the feeding process, resulting in different speeds of the plastic pipe. If the cutting knife cuts at the same speed, the cutting length of the plastic pipe may be different, resulting in inconsistent cutting of the plastic pipe.

[0005] To this end, the present invention provides a plastic cutting device. Summary of the Invention

[0006] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0007] The technical solution adopted by the present invention to solve the technical problem is: a plastic cutting device according to the present invention comprises:

[0008] Workbench;

[0009] Two mounting brackets fixed to the top of the workbench;

[0010] a lifting plate slidably connected to the two mounting brackets;

[0011] A cutting knife fixed to the bottom of the lifting plate;

[0012] An infrared sensor located between the two mounting brackets;

[0013] A stopping mechanism provided on the workbench;

[0014] The braking mechanism includes two arc-shaped clamping plates arranged on the top of the workbench; the two arc-shaped clamping plates are arranged on the side of the mounting frame away from the infrared sensor; two fixing plates are symmetrically fixed to the top of the workbench; a first bidirectional screw rod is rotatably connected between the fixing plates through bearings; the two arc-shaped clamping plates are symmetrically threaded on the first bidirectional screw rod; two cross bars are fixed between the fixing plates; the arc-shaped clamping plates are all slidably connected on the cross bars; a second motor is fixed to the outer side of one of the fixing plates; the output shaft of the second motor is fixed to one end of the first bidirectional screw rod; the inner side walls of the arc-shaped clamping plates are provided with anti-slip grooves;

[0015] Feeding mechanisms are symmetrically provided at both ends of the workbench; each of the feeding mechanisms comprises two feeding rollers, one end of each of the feeding rollers is fixedly connected to a driving motor;

[0016] Both sides of the mounting frame are provided with limiting mechanisms, and the limiting mechanisms each include four limiting rollers; the four limiting rollers are arranged circumferentially.

[0017] Preferably, the limiting mechanism also includes two pillars fixed to the workbench; a fixed frame is fixed to the top of the pillar; an inner gear ring is rotatably connected to the fixed frame through a bearing; four gear columns are rotatably connected to the fixed frame through a rotating shaft; the four gear columns are circumferentially arranged on the fixed frame; the gear columns are all meshed with the inner gear ring; four racks are slidably connected to the fixed frame; the racks are all meshed with adjacent gear columns; one end of the rack inside the fixed frame is fixed to a mounting seat; the limiting rollers are rotatably connected to the mounting seat through roller shafts.

[0018] Preferably, the end of the rack away from the limiting roller is fixed with a connecting plate; the side walls of the rack are fixed with limiting rods; the limiting rods slide in the fixed frame; two second electric push rods are fixed to the top of the workbench; the output end of the second electric push rod is fixed to the connecting plate below.

[0019] Preferably, both ends of the workbench are fixed with a first bracket and a second bracket; a second slide groove is opened in the first bracket; a first slide groove is opened in the second bracket; the outer shell of the drive motor slides in the second slide groove; the other end of the feed roller is connected to a lifting block through a roller shaft, and the lifting block slides in the first slide groove.

[0020] Preferably, a second bidirectional screw is rotatably connected to the first slide groove via a bearing; the lifting blocks are threadedly connected to the second bidirectional screw; a third motor is fixed to the top of the second bracket; the output shaft of the third motor is rotatably connected to the second bracket via a bearing; the output shaft of the third motor is fixed to the second bidirectional screw.

[0021] Preferably, a top plate is fixed between the two mounting frames; a first electric push rod is fixed to the top of the top plate; the output end of the first electric push rod is fixed to the top of the lifting plate; a cutting table is provided directly below the cutting knife, and the cutting table is fixed to the top of the workbench.

[0022] Preferably, two baffles are fixedly connected to the top of the workbench; the two baffles are arranged on both sides of the mounting frame; two reciprocating screws are rotatably connected between the baffles through bearings; the two reciprocating screws are respectively arranged on both sides of the cutting table; the reciprocating screws are threadedly connected to moving blocks; the outer side of one of the baffles is fixedly connected to a first motor; the output shaft of the first motor is fixedly connected to one end of the reciprocating screw; the bottom of the moving blocks is fixedly connected to a cleaning brush; the bottom of the cleaning brush is in contact with the workbench.

[0023] Preferably, one end of the reciprocating screw away from the first motor is fixedly connected to a rotating wheel, and a belt is provided between the two rotating wheels.

[0024] Preferably, the workbench is provided with a plurality of material drop openings; a material collection box is fixedly connected to the bottom of the workbench; the material drop openings are all matched with the material collection box; and one of the material drop openings passes through the cutting table.

[0025] Preferably, the moving blocks are slidably connected to two guide rods; both ends of the guide rods are fixed to the baffle.

[0026] The beneficial effects of the present invention are as follows:

[0027] 1. The plastic cutting equipment described in the present invention, through the cooperation of infrared sensor, arc splint and feeding roller, first puts the plastic pipe through feeding roller and limit roller, when the plastic pipe passes the infrared sensor, the infrared sensor will monitor the length of the plastic pipe conveyed in real time, wherein the length of the first cutting is the distance monitored by the infrared sensor minus the distance between the center line of the infrared sensor and the center line of the cutting blade, and the length of the subsequent cutting is the distance monitored by the infrared sensor minus the distance between the center line of the infrared sensor and the center line of the cutting blade; when the infrared sensor detects the predetermined length, the signal is transmitted to the computer end, and the second motor and the drive motor are controlled by the computer program, and the plastic cutting is stopped by turning off the drive motor. Feeding of the material pipe; the first bidirectional screw is driven to rotate by the second motor, and a ball nut seat is provided at the connection between the first bidirectional screw and the arc-shaped splint, which ensures the radial movement of the arc-shaped splint through the ball nut seat, and the arc-shaped splint is driven to move toward the center at the same time by the first bidirectional screw until the arc-shaped splint clamps the plastic pipe and prevents the plastic pipe from continuing to move forward under the action of inertia; the plastic pipe is prohibited from shaking in the vertical direction under the limitation of the limiting roller and the feed roller; the plastic pipe is prohibited from shaking in the horizontal direction under the action of the arc-shaped splint, realizing the stopping function, and then the first electric push rod is controlled by the computer program to drive the cutting knife to cut the plastic pipe, thereby completing the cutting of the plastic pipe of a specific length.

[0028] 2. The plastic cutting equipment described in the present invention opens the second electric push rod through the cooperation of the rack, the inner gear ring and the gear column, drives the connecting plate to move through the second electric push rod, and the connecting plate drives the rack to move, and the rack drives the limit rod to move, and the limit rod slides in the fixed frame, and the limit rod limits the rack in the same straight line direction. The rack drives the gear column to rotate during movement, and the gear column drives the inner gear ring to rotate, and the rotation of the inner gear ring drives the other three gear columns to rotate synchronously. When these three gear columns rotate, they simultaneously drive the rack to move, so that the effect of synchronous movement of the four racks is achieved, and the rack drives the mounting seat and the limit roller to move until the limit roller is in close contact with the edge of the plastic pipe, so as to fix plastic pipes of different sizes and shapes.

[0029] 3. The plastic cutting equipment described in the present invention is provided with a cleaning brush. When cleaning debris, the first motor is turned on, and the reciprocating screw is driven to rotate by the first motor, and the moving block is driven to move by the reciprocating screw, and the cleaning brush is driven to move by the moving block. The cleaning brush cleans the debris on the workbench, and when the cleaning brush moves to one end of the reciprocating screw, the cleaned debris is dropped into the collection box through the drop port through the drop port, which not only keeps the workbench clean, but also prevents the accumulation of debris, which affects the transportation and cutting of plastic pipes; wherein the baffle can prevent the debris from splashing, facilitates cleaning, and also facilitates the recovery of debris. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The present invention will be further described below with reference to the accompanying drawings.

[0031] Figure 1 is a first stereogram of the present invention;

[0032] Figure 2 is a second perspective view of the present invention;

[0033] Figure 3 It is a structural schematic diagram of the arc-shaped splint in the present invention;

[0034] Figure 4 It is a structural diagram of the fixing frame in the present invention;

[0035] Figure 5 It is a schematic structural diagram of the rack and the gear column in the present invention;

[0036] Figure 6 It is a structural schematic diagram of the baffle in the present invention;

[0037] Figure 7 It is a structural schematic diagram of the limiting roller in the present invention;

[0038] Figure 8 It is a schematic structural diagram of the cutting knife in the present invention;

[0039] In the figure: 1. Workbench; 11. Dropping port; 12. Collecting box; 2. Mounting frame; 21. Top plate; 22. First electric push rod; 23. Lifting plate; 24. Cutting knife; 25. Cutting table; 26. Infrared sensor; 3. Fixing frame; 31. Internal gear ring; 32. Gear column; 33. Rack; 34. Limiting rod; 35. Mounting seat; 36. Limiting roller; 37. Second electric push rod; 38. Support column; 39. Connecting plate; 4. Baffle; 41. 1. Motor; 42. Reciprocating screw; 43. Guide rod; 44. Cleaning brush; 45. Moving block; 46. Rotating wheel; 47. Belt; 5. Arc splint; 51. 2. Motor; 52. 1. Bidirectional screw; 53. Cross bar; 54. Fixed plate; 6. 1. Bracket; 61. 2. Bracket; 62. Feed roller; 63. Driving motor; 64. 3. Motor; 65. Lifting block; 66. 2. Bidirectional screw; 67. 1. Slide; 68. 2. Slide. DETAILED DESCRIPTION

[0040] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0041] like Figures 1 to 8As shown, a plastic cutting device according to an embodiment of the present invention comprises: a workbench 1; two mounting brackets 2 fixedly connected to the top of the workbench 1; a lifting plate 23 slidably connected to the two mounting brackets 2; a cutting knife 24 fixedly connected to the bottom of the lifting plate 23; an infrared sensor 26 arranged between the two mounting brackets 2; a stopping mechanism arranged on the workbench 1; the stopping mechanism comprises two arc-shaped clamping plates 5 arranged on the top of the workbench 1; the two arc-shaped clamping plates 5 are arranged on the side of the mounting bracket 2 away from the infrared sensor 26; two fixed plates 54 are symmetrically fixedly connected to the top of the workbench 1; a first bidirectional screw rod 52 is rotatably connected between the fixed plates 54 via a bearing; the two arc-shaped clamping plates 5 are symmetrically connected to the top of the workbench 1 Threaded connection to the first bidirectional screw rod 52; two cross bars 53 are fixed between the fixed plates 54; the arc-shaped splints 5 are all slidably connected on the cross bars 53; a second motor 51 is fixed to the outer side of one of the fixed plates 54; the output shaft of the second motor 51 is fixed to one end of the first bidirectional screw rod 52; the inner side walls of the arc-shaped splints 5 are provided with anti-slip grooves; feeding mechanisms are symmetrically provided at both ends of the workbench 1; the feeding mechanisms include two feeding rollers 62, and one end of the feeding rollers 62 is fixed to a driving motor 63; limiting mechanisms are provided on both sides of the mounting frame 2, and the limiting mechanisms include four limiting rollers 36; the four limiting rollers 36 are arranged circumferentially.

[0042] When plastic pipes need to be cut, they are usually cut into sections. Since feeding and cutting are two processes, if there is no limit between feeding and cutting, the plastic pipes may be affected by friction or external forces during feeding, resulting in different speeds of the plastic pipes. If the cutting knife cuts at the same speed, the cut lengths of the plastic pipes may be different, resulting in inconsistent cutting of the plastic pipes.

[0043] When the stopping mechanism provided by the present invention is used, the plastic tube is first passed through the feeding roller 62 and the limiting roller 36. When the plastic tube passes the infrared sensor 26, the infrared sensor 26 will monitor the length of the plastic tube conveyed in real time. The length of the first cutting is the distance monitored by the infrared sensor 26 minus the distance between the center line of the infrared sensor 26 and the center line of the cutting blade 24. The length of the subsequent cutting is the distance monitored by the infrared sensor 26 minus the distance between the center line of the infrared sensor 26 and the center line of the cutting blade 24. When the infrared sensor 26 detects the predetermined length, the signal is transmitted to the computer terminal, and the second motor 51 and the drive motor 63 are controlled by the computer program. By turning off the drive motor 63, the feeding of the plastic tube is stopped. 51 drives the first bidirectional screw rod 52 to rotate. A ball nut seat is provided at the connection between the first bidirectional screw rod 52 and the arc splint 5. The ball nut seat ensures the radial movement of the arc splint 5, and the first bidirectional screw rod 52 drives the arc splint 5 to move toward the center at the same time until the arc splint 5 clamps the plastic tube and fixes it to prevent the plastic tube from continuing to move forward under the action of inertia; the plastic tube will not shake in the vertical direction under the limitation of the limiting roller 36 and the feed roller 62; the plastic tube will not shake in the horizontal direction under the action of the arc splint 5, realizing the function of stopping the plastic tube, and then the first electric push rod 22 is controlled by the computer program to drive the cutting knife 24 to cut the plastic tube, thereby completing the cutting of the plastic tube of a specific length.

[0044] like Figure 1 、 Figure 4 and Figure 5 As shown, the limiting mechanism also includes two pillars 38 fixed to the workbench 1; the top of the pillar 38 is fixed to a fixed frame 3; an inner gear ring 31 is rotatably connected to the fixed frame 3 through a bearing; four gear columns 32 are rotatably connected to the fixed frame 3 through a rotating shaft; the four gear columns 32 are circumferentially arranged on the fixed frame 3; the gear columns 32 are all engaged with the inner gear ring 31; four racks 33 are slidably connected to the fixed frame 3; the racks 33 are all engaged with adjacent gear columns 32; one end of the racks 33 inside the fixed frame 3 is fixed to a mounting seat 35; the limiting rollers 36 are rotatably connected to the mounting seat 35 through roller shafts.

[0045] Plastic pipes are mostly square pipes and round pipes. The sizes of plastic pipes are different. In order to prevent the plastic pipes from shifting during transportation or cutting, plastic pipes of different sizes and shapes need to be limited and fixed.

[0046] When in use, the limiting mechanism provided by the present invention drives a rack 33 to move. The rack 33 drives the gear column 32 to rotate during movement, and the gear column 32 drives the inner gear ring 31 to rotate. The rotation of the inner gear ring 31 drives the remaining three gear columns 32 to rotate synchronously. When these three gear columns 32 rotate, they also drive the rack 33 to move, so that the effect of synchronous movement of the four racks 33 is achieved. The rack 33 drives the mounting base 35 and the limiting roller 36 to move until the limiting roller 36 is in close contact with the edge of the plastic pipe, thereby achieving the fixation of plastic pipes of different sizes and shapes.

[0047] like Figure 3 and Figure 4 As shown, the end of the rack 33 away from the limiting roller 36 is fixedly connected to a connecting plate 39; the side walls of the rack 33 are fixedly connected to limiting rods 34; the limiting rods 34 slide in the fixed frame 3; two second electric push rods 37 are fixedly connected to the top of the workbench 1; the output end of the second electric push rod 37 is fixedly connected to the connecting plate 39 below.

[0048] When the limiting rod 34 provided by the present invention is in use and drives the rack 33 to move, the second electric push rod 37 needs to be turned on, and the connecting plate 39 is driven to move by the second electric push rod 37, and the connecting plate 39 drives the rack 33 to move, and the limiting rod 34 is driven to move by the rack 33. The limiting rod 34 slides in the fixed frame 3, and the limiting rod 34 limits the rack 33 in the same straight line direction.

[0049] like Figure 1 and Figure 7 As shown, both ends of the workbench 1 are fixed with a first bracket 6 and a second bracket 61; a second slide groove 68 is provided in the first bracket 6; a first slide groove 67 is provided in the second bracket 61; the outer shell of the drive motor 63 slides in the second slide groove 68; the other end of the feed roller 62 is connected to the lifting block 65 through the roller shaft, and the lifting block 65 slides in the first slide groove 67.

[0050] When the first chute 67 and the second chute 68 provided by the present invention are in use, the distance between the feed roller 62 needs to be adjusted to contact the surface of the plastic pipe; during the up and down movement of the feed roller 62, the feed roller 62 drives the lifting block 65 and the drive motor 63 to slide in the first chute 67 and the second chute 68 respectively, and the first chute 67 and the second chute 68 limit the feed roller 62, the lifting block 65 and the drive motor 63 in the vertical plane.

[0051] like Figure 7As shown, the first slide groove 67 is rotatably connected to the second bidirectional screw rod 66 through a bearing; the lifting blocks 65 are threadedly connected to the second bidirectional screw rod 66; the top of the second bracket 61 is fixedly connected to the third motor 64; the output shaft of the third motor 64 is rotatably connected to the second bracket 61 through a bearing; the output shaft of the third motor 64 is fixedly connected to the second bidirectional screw rod 66.

[0052] The second bidirectional screw rod 66 provided by the present invention is used to adjust the distance between the conveying rollers when in use. By turning on the third motor 64, the third motor 64 drives the second bidirectional screw rod 66 to rotate, and the second bidirectional screw rod 66 drives the lifting block 65, the conveying roller, and the drive motor 63 to move in different directions until the conveying roller is in close contact with the plastic tube, so as to facilitate the transportation of the plastic tube by the rotation of the conveying roller.

[0053] like Figure 1 and Figure 8 As shown, a top plate 21 is fixed between the two mounting frames 2; a first electric push rod 22 is fixed to the top of the top plate 21; the output end of the first electric push rod 22 is fixed to the top of the lifting plate 23; a cutting table 25 is provided directly below the cutting knife 24, and the cutting table 25 is fixed to the top of the workbench 1.

[0054] When the cutting knife 24 provided by the present invention is in use and needs to be cut, the first electric push rod 22 is turned on, and the lifting plate 23 is driven downward by the first electric push rod 22. The two ends of the lifting plate 23 slide on the mounting frame 2, and the cutting knife 24 is driven downward by the lifting plate 23. The cutting knife 24 cuts the plastic pipe downward to complete the cutting of the plastic pipe.

[0055] like Figure 1 and Figure 6 As shown, two baffles 4 are fixed to the top of the workbench 1; the two baffles 4 are arranged on both sides of the mounting frame 2; two reciprocating screws 42 are rotatably connected between the baffles 4 through bearings; the two reciprocating screws 42 are respectively arranged on both sides of the cutting table 25; the reciprocating screws 42 are threadedly connected to a moving block 45; the outer side of one of the baffles 4 is fixed with a first motor 41; the output shaft of the first motor 41 is fixed to one end of the reciprocating screw 42; the bottom of the moving block 45 is fixed with a cleaning brush 44; the bottom of the cleaning brush 44 is in contact with the workbench 1.

[0056] The cleaning brush 44 provided by the present invention is used to clean debris when in use. The first motor 41 is turned on, and the reciprocating screw 42 is driven to rotate by the first motor 41, and the moving block 45 is driven to move by the reciprocating screw 42, and the cleaning brush 44 is driven to move by the moving block 45. The cleaning brush 44 cleans the debris on the workbench 1, which not only keeps the workbench 1 clean, but also prevents the accumulation of debris, which affects the transportation and cutting of plastic pipes; the baffle 4 can prevent debris from splashing, facilitates cleaning, and also facilitates the recovery of debris.

[0057] like Figure 6 As shown, one end of the reciprocating screw rod 42 away from the first motor 41 is fixedly connected to a rotating wheel 46 , and a belt 47 is sleeved between the two rotating wheels 46 .

[0058] When in use, the rotating wheel 46 and the belt 47 provided by the present invention drive the reciprocating screw 42 to rotate through the first motor 41, and the reciprocating screw 42 drives the connected rotating wheel 46 to rotate, and the rotating wheel 46 drives the belt 47 to rotate, and the belt 47 drives another rotating wheel 46 to rotate, and the rotating wheel 46 drives another reciprocating screw 42 to rotate, and the reciprocating screw 42 can drive the connected moving block 45 and the cleaning brush 44 to move, thereby achieving the effect of cleaning debris.

[0059] like Figure 2 and Figure 8 As shown, the workbench 1 is provided with a plurality of material dropping openings 11 ; a material collecting box 12 is fixedly connected to the bottom of the workbench 1 ; the material dropping openings 11 are all matched with the material collecting box 12 ; one of the material dropping openings 11 passes through the cutting table 25 .

[0060] When the drop-out port 11 provided by the present invention is in use, when the cleaning brush 44 moves to one end of the reciprocating screw 42, the cleaned debris is dropped into the collection box 12 through the drop-out port 11; during cutting, part of the debris falls on the cutting table 25, and the debris on the cutting table 25 passes through the drop-out port 11 and falls into the collection box 12, thereby realizing the cleaning and collection of the debris.

[0061] like Figure 6 As shown, the moving block 45 is slidably connected to two guide rods 43 ; both ends of the guide rods 43 are fixed to the baffle 4 .

[0062] When the guide rod 43 provided by the present invention is in use, the moving block 45 slides on the guide rod 43 during movement, and the moving block 45 is limited in a horizontal direction by the guide rod 43 .

[0063] Working principle: When plastic pipes need to be cut, usually longer plastic pipes need to be cut into sections. Since feeding and cutting are two processes, it is impossible to ensure that the cutting and feeding of plastic pipes are completed alternately, and it is impossible to ensure that the cut lengths of plastic pipes are the same, which makes the cutting of plastic pipes inconsistent;

[0064] When in use, the plastic tube is first placed through the feeding roller 62 and the limiting roller 36. When the plastic tube passes the infrared sensor 26, the infrared sensor 26 will monitor the length of the plastic tube conveyed in real time. The length of the first cutting is the distance monitored by the infrared sensor 26 minus the distance between the center line of the infrared sensor 26 and the center line of the cutting blade 24. The length of the subsequent cutting is the distance monitored by the infrared sensor 26 minus the distance between the center line of the infrared sensor 26 and the center line of the cutting blade 24. When the infrared sensor 26 detects the predetermined length, the signal is transmitted to the computer, and the computer program controls the second motor 51 and the drive motor 63. By turning off the drive motor 63, the feeding of the plastic tube is stopped. 51 drives the first bidirectional screw rod 52 to rotate. A ball nut seat is provided at the connection between the first bidirectional screw rod 52 and the arc-shaped clamping plate 5. The ball nut seat ensures the radial movement of the arc-shaped clamping plate 5. The first bidirectional screw rod 52 drives the arc-shaped clamping plate 5 to move toward the center at the same time until the arc-shaped clamping plate 5 clamps and fixes the plastic tube, preventing the plastic tube from continuing to move forward under the action of inertia; the plastic tube is prohibited from shaking in the vertical direction under the limit of the limit roller 36 and the feed roller 62; the plastic tube is prohibited from shaking in the horizontal direction under the action of the arc-shaped clamping plate 5, realizing the stopping function, and then the first electric push rod 22 is controlled by the computer program to drive the cutting knife 24 to cut the plastic tube, thereby completing the cutting of the plastic tube of a specific length;

[0065] The plastic tubes are mostly square tubes and round tubes, and the sizes of the plastic tubes are different. In order to prevent the plastic tubes from shifting during transportation or cutting, it is necessary to limit and fix the plastic tubes of different sizes and shapes; turn on the second electric push rod 37, and the second electric push rod 37 drives the connecting plate 39 to move, and the connecting plate 39 drives the rack 33 to move, and the rack 33 drives the limiting rod 34 to move, and the limiting rod 34 slides in the fixing frame 3, and the limiting rod 34 limits the rack 33 to the same straight line direction. When the rack 33 moves, it drives the gear column 32 to rotate, and the gear column 32 drives the inner gear ring 31 to rotate, and the rotation of the inner gear ring 31 drives the other three gear columns 32 to rotate synchronously. When the three gear columns 32 rotate, they simultaneously drive the rack 33 to move, so that the effect of synchronous movement of the four racks 33 is achieved, and the rack 33 drives the mounting seat 35 and the limiting roller 36 to move until the limiting roller 36 is in close contact with the edge of the plastic tube, so as to achieve the fixation of plastic tubes of different sizes and shapes;

[0066] By turning on the third motor 64, the third motor 64 drives the second bidirectional screw 66 to rotate, and the second bidirectional screw 66 drives the lifting block 65, the conveying roller, and the driving motor 63 to move in different directions until the conveying roller is in close contact with the plastic pipe, so that the conveying roller can rotate to drive the plastic pipe to be conveyed;

[0067] When cleaning debris, turn on the first motor 41, and the reciprocating screw 42 is driven to rotate by the first motor 41, and the moving block 45 is driven to move by the reciprocating screw 42, and the cleaning brush 44 is driven to move by the moving block 45. The cleaning brush 44 cleans the debris on the workbench 1. When the cleaning brush 44 moves to one end of the reciprocating screw 42, the cleaned debris is dropped into the collection box 12 through the drop port 11 through the drop port 11, which not only keeps the workbench 1 clean, but also prevents debris from accumulating and affecting the transportation and cutting of plastic pipes; the baffle 4 can prevent debris from splashing, facilitates cleaning, and also facilitates the recovery of debris.

[0068] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A plastic cutting device comprising: Workbench (1); Two mounting frames (2) fixedly connected to the top of the workbench (1); A lifting plate (23) slidably connected to the two mounting frames (2); A cutting knife (24) fixedly connected to the bottom of the lifting plate (23); An infrared sensor (26) disposed between the two mounting frames (2); A stopping mechanism provided on the workbench (1); The feature is that: the braking mechanism comprises two arc-shaped clamping plates (5) arranged on the top of the workbench (1); the two arc-shaped clamping plates (5) are arranged on the side of the mounting frame (2) away from the infrared sensor (26); two fixing plates (54) are symmetrically fixed to the top of the workbench (1); a first bidirectional screw rod (52) is rotatably connected between the fixing plates (54) through bearings; the two arc-shaped clamping plates (5) are symmetrically threadedly connected to the first bidirectional screw rod (52); two cross bars (53) are fixed between the fixing plates (54); the arc-shaped clamping plates (5) are all slidably connected on the cross bars (53); a second motor (51) is fixed to the outer side of one of the fixing plates (54); the output shaft of the second motor (51) is fixed to one end of the first bidirectional screw rod (52); the inner side walls of the arc-shaped clamping plates (5) are all provided with anti-slip grooves; Feeding mechanisms are symmetrically arranged at both ends of the workbench (1); each of the feeding mechanisms comprises two feeding rollers (62), and one end of each of the feeding rollers (62) is fixedly connected to a driving motor (63); Limiting mechanisms are provided on both sides of the mounting frame (2), and the limiting mechanisms each include four limiting rollers (36); the four limiting rollers (36) are arranged circumferentially; First, the plastic tube passes through a feeding roller (62) and a limiting roller (36). When the plastic tube passes through the infrared sensor (26), the infrared sensor (26) monitors the length of the plastic tube in real time. The length of the first cutting is the distance monitored by the infrared sensor (26) minus the distance between the center line of the infrared sensor (26) and the center line of the cutting knife (24). The length of the subsequent cutting is the distance monitored by the infrared sensor (26) minus the distance between the center line of the infrared sensor (26) and the center line of the cutting knife (24). When the infrared sensor (26) detects a predetermined length, a signal is transmitted to a computer terminal, and the computer program controls the second motor (51) and the drive motor (63). By turning off the drive motor (63), the feeding of the plastic tube is stopped. The second motor (51) drives the second motor (51) to drive the second motor (63). A bidirectional screw rod (52) rotates, and a ball nut seat is provided at the connection between the first bidirectional screw rod (52) and the arc clamping plate (5). The ball nut seat ensures radial movement of the arc clamping plate (5), and the arc clamping plate (5) is driven by the first bidirectional screw rod (52) to move toward the center at the same time until the arc clamping plate (5) clamps and fixes the plastic pipe, thereby preventing the plastic pipe from continuing to move forward under the action of inertia; the plastic pipe will not shake in the vertical direction under the limit of the limit roller (36) and the feed roller (62); the plastic pipe will not shake in the horizontal direction under the action of the arc clamping plate (5), thereby realizing the function of stopping the plastic pipe, and then the first electric push rod (22) is controlled by a computer program to drive the cutting knife (24) to cut the plastic pipe, thereby completing the cutting of the plastic pipe of a specific length; The limiting mechanism further comprises two pillars (38) fixedly connected to the workbench (1); a fixed frame (3) is fixedly connected to the top of the pillar (38); an inner gear ring (31) is rotatably connected to the fixed frame (3) via a bearing; four toothed columns (32) are rotatably connected to the fixed frame (3) via a rotating shaft; the four toothed columns (32) are circumferentially arranged on the fixed frame (3); the toothed columns (32) are meshed with the inner gear ring (31); four racks (33) are slidably connected to the fixed frame (3); the racks (33) are meshed with adjacent racks (32); one end of the racks (33) inside the fixed frame (3) is fixedly connected to a mounting seat (35); the limiting rollers (36) are rotatably connected to the mounting seat (35) via roller shafts; One end of the rack (33) away from the limiting roller (36) is fixedly connected to a connecting plate (39); the side wall of the rack (33) is fixedly connected to a limiting rod (34); the limiting rod (34) slides in the fixed frame (3); two second electric push rods (37) are fixedly connected to the top of the workbench (1); the output end of the second electric push rod (37) is fixedly connected to the connecting plate (39) below.

2. A plastic cutting device according to claim 1, characterized in that: Both ends of the workbench (1) are fixedly connected with a first bracket (6) and a second bracket (61); a second slide groove (68) is provided in the first bracket (6); a first slide groove (67) is provided in the second bracket (61); the housing of the drive motor (63) slides in the second slide groove (68); the other end of the feed roller (62) is rotatably connected to a lifting block (65) via a roller shaft, and the lifting block (65) slides in the first slide groove (67).

3. A plastic cutting device according to claim 2, characterized in that: A second bidirectional screw rod (66) is rotatably connected to the first slide groove (67) via a bearing; the lifting block (65) is threadedly connected to the second bidirectional screw rod (66); a third motor (64) is fixedly connected to the top of the second bracket (61); an output shaft of the third motor (64) is rotatably connected to the second bracket (61) via a bearing; and an output shaft of the third motor (64) is fixedly connected to the second bidirectional screw rod (66).

4. A plastic cutting device according to claim 3, characterized in that: A top plate (21) is fixedly connected between the two mounting frames (2); a first electric push rod (22) is fixedly connected to the top of the top plate (21); an output end of the first electric push rod (22) is fixedly connected to the top of the lifting plate (23); a cutting table (25) is provided directly below the cutting knife (24), and the cutting table (25) is fixedly connected to the top of the workbench (1).

5. A plastic cutting device according to claim 4, characterized in that: Two baffles (4) are fixedly connected to the top of the workbench (1); the two baffles (4) are arranged on both sides of the mounting frame (2); two reciprocating screws (42) are rotatably connected between the baffles (4) via bearings; the two reciprocating screws (42) are respectively arranged on both sides of the cutting table (25); a moving block (45) is threadedly connected to the reciprocating screws (42); a first motor (41) is fixedly connected to the outer side of one of the baffles (4); the output shaft of the first motor (41) is fixedly connected to one end of the reciprocating screw (42); a cleaning brush (44) is fixedly connected to the bottom of each of the moving blocks (45); and the bottom of each of the cleaning brushes (44) is in contact with the workbench (1).

6. A plastic cutting device according to claim 5, characterized in that: One end of the reciprocating screw rod (42) away from the first motor (41) is fixedly connected to a rotating wheel (46), and a belt (47) is sleeved between the two rotating wheels (46).

7. A plastic cutting device according to claim 6, characterized in that: The workbench (1) is provided with a plurality of material drop openings (11); a material collection box (12) is fixedly connected to the bottom of the workbench (1); the material drop openings (11) are all matched with the material collection box (12); and one of the material drop openings (11) passes through the cutting table (25).

8. A plastic cutting device according to claim 7, characterized in that: The moving block (45) is slidably connected to two guide rods (43); both ends of the guide rods (43) are fixedly connected to the baffle (4).

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