CN110842999A - Cutter device for paper tube cutting machine - Google Patents

Abstract

The invention discloses a cutter device of a paper tube cutting machine, which comprises a cylinder, a piston rod of the cylinder is connected to a sliding block; an insulating seat is fixed on the sliding block; A conductive connecting shaft, one end of the connecting shaft is connected with a cutting knife; a signal wire is installed on the insulating base, and the signal wire is electrically connected with the connecting shaft; the signal wire is connected with the external control system, and the cutting knife passes through the connecting shaft, the signal wire and the control System is connected. When the cutter contacts the mandrel, a current path is formed, and current is generated in the whole path. After the control system detects the current signal, it immediately controls the cutter to retreat, which can avoid the collision between the cutter and the mandrel and prevent damage to the blade of the cutter. And the surface of the mandrel, improve the service life of the cutter and the mandrel, reduce the production and processing cost, and can reduce the number of replacements and greatly improve the production efficiency.

Description

Cutter device for paper tube cutting machine

technical field

The invention relates to the technical field of paper tube processing equipment, in particular to a cutter device of a paper tube cutting machine for cutting the paper tube.

Background technique

As a common product in daily life, paper tube has a wide range of applications, such as tape, roll paper, plastic film and other products, all use paper tube as the inner core. When making a paper tube, first combine a certain thickness and hardness of paper with glue, and wind the hard paper into a paper tube on a special rolling device. Since the winding process is continuous, the paper tube needs to be cut into a long length during the manufacturing process. A long paper tube of one meter to several meters. At this time, the length of the paper tube is very long, and it cannot be directly applied to products such as tape and roll paper. Therefore, special paper tube cutting equipment is also required to cut the long paper tube into small pieces of paper tubes of specified length. When the prior art paper tube cutting machine works, the paper tube rotates at high speed under the drive of the chuck, the cutter approaches the paper tube and is tangent to the high-speed rotating paper tube, and the paper tube is cut by the friction force between the two. , but the cutting machine itself cannot confirm when the cutter will cut the paper tube, so in the prior art, a larger advance of the cutter is usually set to ensure that the cutter has enough cutting volume to completely cut the paper tube. Since the inside of the paper tube is a metal mandrel, and the distance between the inner wall of the paper tube and the mandrel is very small, after the cutter cuts the paper tube, it is easy to collide with the mandrel in the process of moving forward, causing the cutter to roll up the edge, resulting in In the subsequent cutting process, the incision is not smooth, which affects the quality of the paper tube, and even causes scrap, and the cutter needs to be replaced frequently, which reduces the processing efficiency. Moreover, because the cutter and the mandrel often collide, the cutter will scratch the surface of the mandrel. After a period of time, the surface of the mandrel will be scratched by the cutter, causing the surface of the mandrel to be uneven, which is easy to cause the paper tube to rotate at high speed. Instability, it will also cause the incision not to be smooth, affecting the cutting quality, and the mandrel needs to be replaced, which increases the processing cost. At the same time, all the paper tube cutting machines in the prior art have only one cutter for cutting, and the processing efficiency is low. Moreover, since the cutter does not rotate during the cutting process, the cutter always cuts the paper tube at the same position, which is likely to cause local blade damage, and requires frequent replacement of the cutter, which affects the processing efficiency.

SUMMARY OF THE INVENTION

In the existing paper tube cutting machine, the applicant cannot automatically detect whether the cutter is in contact with the metal mandrel, resulting in damage caused by the collision between the cutter and the mandrel, and the inability of the cutter to rotate, resulting in frequent replacement of the cutter, affecting the processing efficiency and increasing the To solve the maintenance cost and other issues, a new type of cutter device for the paper tube cutting machine is provided, which can avoid the cutter and the mandrel from being damaged due to collision, and periodically rotate the cutter to reduce the maintenance cost and improve the processing efficiency of the cutting machine.

The technical scheme adopted in the present invention is as follows:

A cutter device for a paper tube cutting machine, comprising a cylinder, a piston rod of which is connected to a sliding block; an insulating seat is fixed on the sliding block; the insulating seat is provided with insulating material, through holes are processed in the insulating material, and the holes are installed in the holes A conductive connecting shaft, one end of the connecting shaft is connected with a cutting knife; a signal wire is installed on the insulating base, and the signal wire is electrically connected with the connecting shaft; the signal wire is connected with an external control system, and the cutting knife passes through the connecting shaft, The signal line communicates with the control system.

As a further improvement of the above technical solution:

Metal conductive bolts are installed on the insulating seat, the conductive bolts pass through the insulating material and contact the connecting shaft, and the conductive bolts are externally connected to the signal lines.

A cutter fixing plate is installed between the connecting shaft and the cutter, and the cutter is installed on the cutter fixing plate.

The control system can provide voltage to the cutter, and detect the current signal in the circuit, and control the movement of the cutter device.

A cutter rotating mechanism is installed at the other end of the connecting shaft, and the connecting shaft is electrically isolated from the cutter rotating mechanism.

The cutter rotating mechanism is composed of a stepping motor and a reduction gear, and the reduction gear is an insulating material.

The sliding block is installed on the guide rail, and the guide rail is fixed on the base.

The cutter device has two sets of upper and lower sets, and the two sets of cutter devices are fixed together.

The beneficial effects of the present invention are as follows:

In the cutter device of the present invention, the cutter is installed on the insulating seat. When the cutter contacts the mandrel, a current path is formed at the moment when the cutter is in contact with the mandrel, and current is generated in the whole path. After the control system detects the current signal, it immediately controls the cutter to retreat, which can avoid cutting The collision between the knife and the mandrel prevents damage to the blade of the cutter and the surface of the mandrel, improves the service life of the knife and the mandrel, reduces the production and processing cost, and can reduce the number of replacements and greatly improve the production efficiency.

The cutter device of the present invention is equipped with a cutter rotation mechanism. During the processing, when the blade at one position of the cutter operates for a certain period of time or after cutting a certain amount, the cutter rotation mechanism drives the cutter to rotate at a certain angle, so that the new blade part is Align the paper tube for cutting, avoid cutting with the blade in one position all the time, and improve the service life of the cutter.

The cutter device of the invention has two sets of upper and lower sets, and the two sets of cutter devices are fixed together, and can cut two paper tubes at the same time, thereby greatly improving the processing efficiency of the paper tubes.

Description of drawings

Figure 1 is a front view of the paper tube cutting machine.

FIG. 2 is a top view of FIG. 1 without the clamping and rotating device shown.

FIG. 3 is a schematic diagram of the tool device and the mandrel of the present invention cooperating.

FIG. 4 is a top view of the cutter device of FIG. 3 .

FIG. 5 is a cross-sectional view along the AA direction in FIG. 4 , showing only the structure of one cutter.

FIG. 6 is a cross-sectional view taken along the BB direction in FIG. 4 , only showing the structure of one cutter.

In the figure: 1. Frame; 2. Clamping and rotating device; 3. Tool device; 4. Horizontal moving device; 5. Mandrel fixing device; 6. Driving device; 7. Control system; 8. Mandrel; 9. Center roller; 10, mandrel group; 11, cutter; 12, cylinder; 13, cutter rotation mechanism; 14, insulating seat; 15, connecting shaft; 16, conductive bolt; 17, signal wire; 18, slider; 19, fixing bolt; 20, base; 21, cutter fixing plate; 22, motor; 23, screw rod; 24, connecting seat; 25, guide rail.

Detailed ways

The specific embodiments of the present invention will be described below with reference to the accompanying drawings.

As shown in Figures 1 and 2, the paper tube cutting machine using the cutter device of the present invention includes a frame 1 and a control system 7. One end of the frame 1 is installed with a mandrel fixing device 5 and a driving device 6, and the other end is installed with a clamping rotation The device 2 and the driving device 6 are fixedly connected with the mandrel fixing device 5, and are used to drive the mandrel fixing device 5 to rotate and move horizontally. The central position of the mandrel fixing device 5 is installed with a central roller 9, and a plurality of mandrels 8 are installed on the edge. The rotating device 2 is used to clamp the paper tube and drive the paper tube to rotate at a high speed to complete the cutting.

A horizontal moving device 4 is also installed on the frame 1 of the paper tube cutting machine, and a cutting tool device 3 is installed above the horizontal moving device 4, which can drive the cutting tool device 3 to move horizontally along the axis of the mandrel 8. By moving a certain distance each time, The cutter device 3 cuts the paper tube sleeved on the mandrel 8 to form a small paper tube of a certain length. In this embodiment, the number of mandrels 8 is preferably 8, and every two mandrels 8 form a set of mandrel groups 10, and there are 4 groups in total. The cutter device 3 is equipped with two sets of upper and lower cutters, which are used to cut two paper tubes at the same time. .

The horizontal moving device 4 includes a motor 22, the output shaft of the motor 22 is connected with a lead screw 23, the two ends of the lead screw 23 are mounted with connecting seats 24, and the cutter device 3 is mounted on the lead screw nut. When the motor 22 works, the tool device 3 is driven to move horizontally by the screw rod 23 . The length of the paper tube product is set in the cutting machine control system 7. After the cutter device 3 completes one cutting, the horizontal moving device 4 drives the cutter device 3 to move horizontally the same distance as the length of the paper tube product, and the next cutting is performed. A long paper tube is cut. When the whole long paper tube is completely cut, the horizontal moving device 4 drives the cutter device 3 to return to the starting position, ready to cut the next group of paper tubes.

As shown in FIG. 3 , the cutter device 3 of the present invention includes two sets of upper and lower cutters, and the two sets of cutters are fixed together. Taking the above tool as an example, as shown in FIGS. 4 , 5 and 6 , the tool device 3 includes an air cylinder 12 , the piston rod of the air cylinder 12 is connected to the slider 18 , the slider 18 is installed on the guide rail 25 , and the guide rail 25 is fixed on the base 20 . superior. An insulating seat 14 is installed above the slider 18 through fixing bolts 19, and the insulating seat 14 is made of insulating material. The insulating seat 14 is machined with a central through hole perpendicular to the axis of the cylinder 12 in the horizontal direction. A connecting shaft 15 is installed in the hole. The connecting shaft 15 can conduct electricity. , the cutter 11 is installed on the cutter fixing plate 21 . In this embodiment, the cutter rotating mechanism 13 is composed of a stepping motor and a reduction gear, and the reduction gear is an insulating material to ensure that the connecting shaft 15 is electrically isolated from the stepping motor. The cutter rotating mechanism 13 is used to drive the connecting shaft 15 and the cutting The knife 11 is rotated by a certain angle. Metal conductive bolts 16 are installed above the insulating seat 14 , and the conductive bolts 16 pass through the upper half of the insulating seat 14 and are in contact with the connecting shaft 15 . The conductive bolt 16 is externally connected with a signal wire 17, and the signal wire 17 is connected to the control system 7, which is controlled by the control system 7 and a safety voltage is applied. Through the above structure, the signal line 17 is communicated with the cutter 11 through the conductive bolt 16 , the connecting shaft 15 , and the cutter fixing plate 21 in sequence.

When the cutter device 3 starts to work, the cutter 11 is not in contact with the paper tube. At this time, there is voltage on the cutter 11, but no current flows. The air cylinder 12 pushes the slider 18 and the cutter 11 to move to the position of the mandrel 8, tangent to the high-speed rotating paper tube, and cuts the paper tube. After the paper tube is cut, the cutter 11 continues to move forward. When the cutter 11 is in contact with the mandrel 8, since the mandrel 8 is a metal material, a passage is formed through the entire cutter. Therefore, the moment when the cutter 11 contacts the mandrel 8, a current path is formed, and current is generated in the entire path. At this time, the signal line 17 will also have a current flow. After the control system 7 detects the current signal of the signal line 17, it immediately Control the cylinder 12 to retreat, and return the cutter 11 to the starting position. Through the cooperation of the above different insulating and conductive structures, the control system 7 can monitor the current at the moment when the cutter 11 contacts the mandrel 8, and control the cutter 11 to retreat, so that the cutter 11 will not collide with the mandrel 8 to avoid The cutting edge of the cutter 11 and the surface of the mandrel 8 are damaged, the service life of the cutter 11 and the mandrel 8 is increased, the production and processing cost is reduced, the number of replacements can be reduced, and the production efficiency is greatly improved.

In the process of cutting the paper tube, since the cutter 11 does not need to rotate at high speed, if the cutter 11 is always cut at one position, the edge of the cutter 11 will be curled, which will affect the quality of the paper tube incision. In the present invention, by setting the cutter rotating mechanism 13, when the blade at one position of the cutter 11 operates for a certain period of time or after cutting a certain amount, the cutter rotation mechanism 13 drives the cutter 11 to rotate at a certain angle, so that the new blade is partially aligned with the paper tube The cutting is performed to avoid cutting with the blade in one position all the time, so as to improve the service life of the cutter 11 .

Referring to FIG. 3 , when the paper tube cutting machine using the cutter device of the present invention works, the four sets of mandrel groups 10 have different functions respectively, and the two mandrels 8 arranged vertically on the right side form a set of mandrel groups 10, each of which A paper tube is sleeved on the mandrel 8, and the cutter device 3 has two upper and lower cutters, which can cut two paper tubes at the same time, which doubles the processing efficiency compared with the cutting of a single paper tube in the prior art. The top mandrel set 10 has been fitted with two paper tubes to be cut. The mandrel group 10 on the left faces the operator. When the cutting machine cuts the right paper tube, the operator takes off the previously cut small paper tube and conducts a preliminary inspection, and at the same time sets the new long paper tube set. on the mandrel 8. As for the mandrel group 10 located at the bottom, the two mandrels 8 are covered with small paper tubes that have already been cut. However, because the two mandrels are located at the bottom, it is inconvenient to operate and used as a transition area. When the two paper tubes on the right are cut, the driving device 6 drives the mandrel fixing device 5 to rotate precisely 90 degrees. At this time, the top mandrel group 10 turns to the right to perform the next group of cutting, while the other three groups The mandrel group 10 is also rotated to the next process. By using the cutter device 3 with two sets of cutters in the present invention, the processing efficiency of the paper tube can be more than doubled.

The above description is an explanation of the present invention, not a limitation of the present invention. The present invention may be modified in any form without departing from the spirit of the present invention.

Claims (8)

1. A cutter device for a paper tube cutting machine, characterized in that it comprises a cylinder (12), and a piston rod of the cylinder (12) is connected to a slider (18); an insulating seat (14) is fixed on the slider (18). ); the insulating seat (14) has insulating material, through holes are processed in the insulating material, a conductive connecting shaft (15) is installed in the hole, and a cutter (11) is connected to one end of the connecting shaft (15); the insulating material A signal wire (17) is installed on the seat (14), and the signal wire (17) is electrically connected to the connecting shaft (15); the signal wire (17) is communicated with an external control system, and the cutter (11) passes through the connecting shaft in turn. (15), the signal line (17) is communicated with the control system. 2 . The cutter device of a paper tube cutting machine according to claim 1 , wherein the insulating seat ( 14 ) is provided with metal conductive bolts ( 16 ), and the conductive bolts ( 16 ) are connected to the insulating material after passing through the insulating material. 3 . The shaft (15) is in contact, and the conductive bolt (16) is externally connected to the signal wire (17). 3 . The cutter device of the paper tube cutting machine according to claim 1 , wherein a cutter fixing plate ( 21 ) is installed between the connecting shaft ( 15 ) and the cutter ( 11 ), and the cutter fixing disc is 3 . Install the cutter (11) on the (21). 4. The cutter device of the paper tube cutting machine according to claim 1, characterized in that: the control system can provide voltage to the cutter (11), and detect the current signal in the circuit, and control the movement of the cutter device . 5. The cutter device of a paper tube cutting machine according to claim 1, characterized in that: the other end of the connecting shaft (15) is provided with a cutter rotating mechanism (13), and the connecting shaft (15) and the cutter rotating mechanism (13) Electrical isolation. 6 . The cutter device of a paper tube cutting machine according to claim 5 , wherein the cutter rotating mechanism ( 13 ) is composed of a stepping motor and a reduction gear, and the reduction gear is an insulating material. 7 . 7 . The cutter device of the paper tube cutting machine according to claim 1 , wherein the sliding block ( 18 ) is installed on the guide rail ( 25 ), and the guide rail ( 25 ) is fixed on the base ( 20 ). 8 . 8. The cutter device of a paper tube cutting machine according to any one of claims 1 to 7, wherein the cutter device has two sets of upper and lower sets, and the two sets of cutter devices are fixed together.

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