CN103193102A - Floating roll device for film production device - Google Patents

Abstract

The present invention is a floating roller device for film production equipment. Both ends of the floating roller are rotatably connected to a rotating arm, and the middle parts of the left and right rotating arms are respectively hinged to the piston rod of a cylinder, and the cylinder barrel of the cylinder is connected to the wallboard. . 2. The rotating arm is fixedly connected with the rotating rod, and the two ends of the rotating rod are rotatably installed on the wallboard. One end of the rotating rod is connected with an angle encoder of a position detection mechanism, and the signal line of the encoder is connected with the control mechanism of the reel drive motor. The film goes down from the front guide roller, goes around the bottom of the floating roller, and then winds up to the reel through the rear guide roller. A counterweight is mounted on the far end of the boom relative to the dancer roller. The pulling force of the film on the floating roller, the gravity of the floating roller, the thrust of the cylinder and the gravity of the counterweight are balanced, and the floating roller is in a balanced position. This device can adapt to the film tension value from 2N to 200N, and can be used for plastic films of different specifications, as well as paper or cloth; it adopts a low-friction cylinder with a sensitivity of ±0.01N.

Description

Floating roll unit for film production equipment

technical field

The invention relates to film production equipment, in particular to a floating roller device of the film production equipment.

Background technique

In the winding and unwinding process of film production and processing, the diameter of the film roll is constantly changing, and the change in the diameter of the film roll will cause the tension of the film roll to change. If the tension of the film roll is too small, the film roll will loosen and wrinkle, a large amount of air will be involved, and the roll will be uneven in the transverse direction. If the tension of the film roll is too high, the roll will be overstretched, longitudinal tension lines will appear on the surface of the film, raised ribs will appear on the surface of the film roll, and even the film will be deformed and broken. Therefore, in the process of film winding and unwinding, in order to ensure the production efficiency and the surface quality of the film, the tension must always be kept constant.

In actual production, the surface line speed of the film roll that takes up the film changes dynamically as the diameter of the film roll increases. At the same time, the speed of the film conveyed by the front equipment will also change with the change of the production speed, which will cause the film The tension on it is constantly changing. In order to keep the tension of the film constant, it is necessary to automatically adjust the speed of the winding reel according to the tension of the film roll.

At present, the floating roller device is more commonly used to detect the tension and control the speed of the reel. The film conveyed by the previous process passes through the guide roller and is taken up by the reel. The floating roller is set between the two guide rollers. The floating roller is lower than the guide roller. Both ends of the floating roller are rotatably connected with rotating arms. The piston rods of the cylinders meet. The other side of the rotating arm is connected with a position detection mechanism, and the signal of the position detection mechanism is connected with the reel motor control mechanism. The film goes down from the front guide roller, goes around the bottom of the floating roller, and then winds up to the reel through the rear guide roller. At the beginning, the pulling force of the film on the floating roller is balanced with the gravity of the floating roller and the thrust of the cylinder, and the floating roller is in a balanced position. As the diameter of the film roll increases, the linear speed of the film increases, the tension acting on the film increases, and the floating roller swings upward. The floating roller swings upwards to drive the rotating arm to swing, and the position detection mechanism connected to it operates, and the signal is sent to the reel motor control mechanism to reduce the reel speed, the film tension returns to a given value, and the floating roller returns to the equilibrium position.

However, the sensitivity of the existing floating roller device is not high, and the speed of the reel can only be adjusted when the tension of the coil reaches more than 20N (Newton). Still cannot fully guarantee the quality of film rolls. In addition, this floating roller device can only be adjusted and controlled corresponding to one kind of film tension. When producing films of different specifications, the film tension is different, and the floating roller device cannot be adjusted to adapt.

In order to improve the control accuracy of the floating roller device, the Chinese invention patent application No. CN200710031010.1 "New floating roller device for the winding mechanism of the cast film machine" discloses a swing arm, two supporting shafts, a synchronous wheel, and a synchronous belt. Structure. However, this scheme has a complex structure, difficult adjustment, and is not easy to implement and use.

Contents of the invention

The purpose of the present invention is to design a floating roller device for film production equipment, including guide rollers, floating rollers, rotating arms, cylinders, position detection mechanism actions and reel motor control mechanisms, and a counterweight at the far end of the rotating arm , can balance the tension of the film with the gravity of the floating roller and the force of the cylinder, and adapt to the given tension value of the film with different specifications.

The floating roller device of the film production equipment designed by the present invention includes a guide roller, a floating roller, a rotating arm, a cylinder, a position detection mechanism and a reel motor control mechanism, the floating roller is arranged between two guiding rollers, and the floating roller is lower than the guiding roller. Roller, the film goes down from the front guide roller, bypasses the bottom of the floating roller, and then winds up to the reel through the rear guide roller to form a film roll.

Both ends of the floating roller are fixedly connected to a rotating arm, and the middle parts of the left and right rotating arms are hinged to the piston rod of a cylinder, and the cylinder barrel of the cylinder is connected to the wallboard of the equipment. The rotating arm is connected with a position detection mechanism, and the signal of the position detection mechanism is connected with the reel motor control mechanism. The film goes down from the front guide roller, goes around the bottom of the floating roller, and then winds up to the reel through the rear guide roller. The floating roller device designed in the present invention is also equipped with a rotating rod and a counterweight. The two ends of the rotating rod are rotatably installed on the wallboard of the equipment. between the rod and the floating roller. A counterweight is mounted on the far end of the boom relative to the dancer roller. The position detection mechanism is an angle encoder, which is connected with the rotating rod through a shaft coupling, and the signal line of the angle encoder is connected with the reel motor control mechanism.

At the beginning, the pulling force of the film on the floating roller, the gravity of the floating roller, the thrust of the cylinder and the gravity of the counterweight are balanced, and the floating roller is in a balanced position. For different films, the tension is different, and the floating roller can be in the set balance position by adjusting the counterweight.

As the diameter of the film roll increases, the linear speed of the film increases, the tension acting on the film increases, and the floating roller swings upward. The floating roller swings upwards to drive the rotating arms on both sides to rotate, and the rotating rod drives the angle encoder to rotate synchronously. The angle encoder measures the rotation angle signal and sends it to the reel motor control mechanism to adjust the reel motor speed. The tension returns to a given value, and the floating roller returns to its original equilibrium position.

In order to improve the sensitivity of the device, the cylinder is a low-friction cylinder, and the change of the air source pressure is as low as 0.005Mpa to make the cylinder piston move, and the output force of 0.01N can be precisely controlled. When the film tension changes slightly by 0.01N, the piston of the cylinder can move to make the rotating arm rotate, and the angle encoder detects the rotation of the rotating arm to adjust the reel motor speed in time to make the winding operation more stable.

A pressure regulating valve is installed at the intake end of the cylinder to regulate the pressure of the cylinder. When adjusting the balance position of the floating roller in the initial state, the balance weight can be adjusted, and the cylinder pressure, that is, the cylinder thrust received by the rotating arm, can be adjusted to make the floating roller reach the required balance position.

For the convenience of operation and control, the pressure regulating valve is an electric proportional valve, and the control signal line of the electric proportional valve is connected with the reel drive motor control mechanism. By changing the current value or voltage value of the control valve, the intake pressure of the cylinder changes accordingly, realizing the stepless adjustment of the cylinder pressure, realizing remote control and program control.

The two pivoting arms are hinged to the piston rod of the cylinder, the cylinder can rotate around the connection point at the top of the piston rod, the tail of the cylinder barrel is hinged to the cylinder seat, the cylinder seat is fixed on the wallboard, and the cylinder barrel can rotate along the cylinder seat.

Taking the distance from the centerline of the floating roller to the centerline of the rotating rod as L, the distance between the connecting point of the cylinder piston rod on the rotating arm and the centerline of the rotating rod is 1/2L to 2/3L, and the distance between the center of the counterweight and the center of the rotating rod is 2/5L to 6/5L.

There are 1 to 6 counterweights of different weights, which are convenient for selection and use when adjusting the initial state.

There is a groove along the longitudinal direction of the rotating arm at the far end of the rotating arm. The bolt connects the rotating arm and the counterweight through the groove. The distance between the center of the counterweight and the rotating rod can be adjusted by using this groove, that is, the moment arm of the counterweight can be adjusted. It is used to adjust the counterweight in the initial state so that the floating roller is in the set balance position, and it can also prevent the counterweight from falling off the rotating arm accidentally.

The reel motor control mechanism includes a programmable logic controller (PLC) and a governor, the signal of the angle encoder is connected to the input terminal of the programmable logic controller, and the output of the programmable logic controller is connected to the governor, The governor is connected to the reel motor. The PLC processes the angle signal, compares it with the original balance point angle voltage signal, and obtains the deviation value. After the integral operation, the reel motor speed adjustment value is obtained. The motor speed adjustment value output by the PLC is connected to the speed controller to adjust the speed. The controller adjusts the reel motor speed. During the whole process of the film being taken up by the reel, as the diameter of the film reel increases, the floating roller swings up and down, so that the angle encoder generates a real-time feedback signal, and the reel motor speed is constantly adjusted, indirectly controlling the film reeled by the reel. The tension is kept constant, and the dancer roller is maintained at the balance position adjusted by the initial state.

The reel motor is a variable frequency motor or a servo motor, and the corresponding governor is a frequency converter or a servo controller.

One of the two rotating arms has a limit seat above and below the joint of the floating roller, and the limit seat is fixed on the wallboard to limit the rotation range of the rotating arm and protect the floating roller, angle encoder and other components. Vibration-absorbing pads are arranged on the face of the limit seat towards the rotating arm.

Compared with the prior art, the advantages of the floating roller device of the film production equipment of the present invention are: 1. By changing the cylinder pressure and the weight and position of the counterweight, the film tension value can be adapted from 2N to 200N, and can be used for plastics of different specifications. Film products can also be used for paper winding in the printing industry, or cloth winding in the textile industry; 2. Using a low-friction cylinder, the sensitivity of the action can reach ±0.01N, that is, the film tension value can be adjusted when it changes to ±0.01N , which ensures the stable collection of the film roll, improves the production efficiency and the surface quality of the film; 3. The initial balance position of the floating roller can be realized by adjusting the cylinder pressure, weight and position of the counterweight, which is convenient and quick; 4. Simple structure and easy installation , suitable for various specifications of film winding equipment.

Description of drawings

Fig. 1 is the structural representation of the embodiment of the floating roller device of this film production equipment;

Figure 2 is a side view of Figure 1

1. Angle encoder, 11. Protective cover, 2. Elastic coupling, 3. Counterweight, 4. Rotating arm, 5. Rotating rod, 6. Cylinder, 61. Piston rod, 62. Cylinder, 63. Cylinder seat, 7, floating roller, 71, mandrel, 8, limit seat, 9, wallboard, 10, film.

Detailed ways

The embodiment of the floating roller device of this film production equipment is shown in Figures 1 and 2. The floating roller 7 is a hollow roller, and a rolling bearing is embedded in each of the two ends of the floating roller. Step is arranged on 71, passes bearing endoporus and is fixed as one with roller by shaft collar and roller, and the two ends of mandrel 71 are fixed in the corresponding hole of left and right turning arm 4. The floating roller 7 is lower than the guide roller, and the film 10 goes downward from the front guide roller, bypasses the bottom of the floating roller 7, and is wound up on the reel by the rear guide roller to form a film roll.

There are steps at both ends of the rotating rod 5, and the left end of the rotating rod 5 passes through the relative hole of the rotating arm 4 on the left side and is fixedly connected with the rotating arm 4 on the left side; the right end of the rotating rod 5 passes through the corresponding hole of the rotating arm 4 on the right side and is connected with The right rotating arm 4 is fixedly connected; the two ends of the rotating rod are installed on the wallboards 9 on both sides through bearing seats and bearings. The floating roller 7 forms a rectangular frame with the rotating rod 5 and the left and right rotating arms 4 through the mandrel 71, and this rectangular frame can swing up and down around the rotating rod 5. The left end of the rotating rod 5 passes through the wallboard 9 and links to each other with the angle encoder 1 through the elastic coupling 2. The angle encoder 1 is fixed on the wallboard 9, and the angle encoder 1 is equipped with a protective cover 11 outside. The signal line of the angle encoder 1 is connected with the reel motor control mechanism.

Left and right pivoting arms 4 are provided with grooves along the longitudinal direction of pivoting arms 4 on the far-end side relative to floating roller 7. Counterweight 3 is worn on pivoting arm 4 and is fixed in the pivoting arm groove by bolts. The distance between the center of the counterweight 3 and the rotating rod 5 can be adjusted longitudinally on the arm 4 . In this example, there are 3 counterweights of different weights for selection.

The rotating arm 4 on the left side of this example has a limit seat 8 respectively above and below the joint with the floating roller, and the limit seat 8 is fixed on the wallboard 9 . The limit seat 8 is equipped with a damping pad towards the face of the rotating arm 4 .

The middle part of left and right swing arm 4 is respectively hinged with the piston rod 61 of a cylinder 6. The cylinder 6 is a low-friction cylinder. As shown in Figure 2, the cylinder piston rod 61 can rotate along the connection point. The cylinder barrel 62 afterbody of low-friction cylinder 6 is hinged with the cylinder block, and the cylinder block 63 is fixed on the wallboard 9, and the cylinder barrel can rotate along the cylinder block.

The intake end of the cylinder 6 is equipped with an electric proportional valve. The control signal line of the electric proportional valve is connected with the reel motor control mechanism.

In this example, the distance from the centerline of the floating roller 7 to the centerline of the rotating rod 5 is L, the distance between the connection point of the cylinder piston rod 61 on the rotating arm 4 and the centerline of the rotating rod 5 is 1/2L, and the center of the counterweight and the center of the rotating rod The distance is L.

The reel motor control mechanism includes a programmable logic controller (PLC) and a governor, the signal of the angle encoder is connected to the input terminal of the programmable logic controller, and the output of the programmable logic controller is connected to the governor, The governor is connected to the reel motor. In this example, the reel motor is a variable frequency motor, and the governor is a frequency converter.

In the initial state, adjust the electric proportional valve of the cylinder 6 and the counterweight 3 so that the pulling force of the film 10 acting on the floating roller 7, the gravity of the floating roller 7, the thrust of the cylinder 6 and the gravity of the counterweight 3 are balanced, and the floating roller 7 is in a balanced position. As the diameter of the film roll increases, the linear speed of the film 10 increases, the tension acting on the film 10 increases, and the floating roller 7 swings upward. The floating roller 7 swings upwards to drive the rotating arms 4 on both sides to rotate, and the rotating rod 5 drives the angle encoder 1 to rotate synchronously. The rotation angle signal measured by the angle encoder 1 is sent to the reel motor control mechanism to adjust the reel motor speed. The rotating speed drops, the tension of the film 10 returns to a given value, and the floating roller 7 returns to the original equilibrium position.

The floating roller device of this example is applied in the winding section of the film production line. During the film winding process, the speed of the reel is constantly adjusted according to the film tension. ensure. And when the variety of the film to be produced changes, the device can conveniently adjust and adapt to the tension of different films.

The above-mentioned embodiments are only specific examples for further specifying the purpose, technical solutions and beneficial effects of the present invention, and the present invention is not limited thereto. Any modifications, equivalent replacements, improvements, etc. made within the disclosed scope of the present invention are included in the protection scope of the present invention.

Claims (10)

1. the float roller device of film production equipment, comprise guiding roller, dancer, pivoted arm, cylinder, position detecting mechanism and reel motor control mechanism, dancer is arranged between 2 guiding rollers, dancer is lower than guiding roller, guiding roller is downward in the past for film, walk around dancer below, upwards batch through the back guiding roller again and form film on the reel and roll up; Pivoted arm of each captive joint of dancer two ends, each is hinged the middle part of left and right 2 pivoted arms with the piston rod of a cylinder, the cylinder barrel of cylinder is connected in the wallboard of equipment, and pivoted arm is connected to position detecting mechanism, and the signal of position detecting mechanism is connected with the reel motor control mechanism; It is characterized in that:

Also dispose revolving bar (5) and clump weight (3), revolving bar (5) two ends are rotatably installed on wallboard (9), pivoted arm (4) is captiveed joint with revolving bar (5), and the point of connection of cylinder piston rod (61) and pivoted arm (4) is between revolving bar (5) and the dancer (7); Clump weight (3) is installed on pivoted arm (4) with respect to the far-end of dancer (7), position detecting mechanism is angular encoder (1), angular encoder (1) is connected with revolving bar (5) through coupler, and the signal wire (SW) of angular encoder (1) is connected with the reel motor control mechanism.

2. the float roller device of film production equipment according to claim 1 is characterized in that:

Described cylinder (6) is low friction cylinder.

3. the float roller device of film production equipment according to claim 1 is characterized in that:

The inlet end of described cylinder (6) is equipped with pressure regulating valve.

4. the float roller device of film production equipment according to claim 3 is characterized in that:

Described pressure regulating valve is electric Proportion valve, and the control signal wire of this electric Proportion valve is connected with the reel motor control mechanism.

5. the float roller device of film production equipment according to claim 1 is characterized in that:

Described dancer (7) line of centers is L to the distance of revolving bar (5) line of centers, and the distance of pivoted arm (4) upper cylinder piston rod (61) point of connection and revolving bar (5) line of centers is 1/2L to 2/3L.

6. the float roller device of film production equipment according to claim 5 is characterized in that:

The distance at described clump weight (3) center and revolving bar (5) center is 2/5L to 6/5L.

7. the float roller device of film production equipment according to claim 1 is characterized in that:

Described clump weight (3) is 1～6 of Different Weight.

8. the float roller device of film production equipment according to claim 1 is characterized in that:

Described pivoted arm (4) far-end has along pivoted arm (4) groove longitudinally, and bolt connects pivoted arm (4) and clump weight (3) through groove.

9. the float roller device of film production equipment according to claim 1 is characterized in that:

Described reel motor control mechanism comprises programmable logic controller (PLC) and governor, and the signal of angular encoder (1) inserts the input end of programmable logic controller (PLC), and the output of programmable logic controller (PLC) inserts governor, and governor connects the reel motor.

10. the float roller device of film production equipment according to claim 1 is characterized in that:

One of described 2 pivoted arms (4) respectively have a limit base (8) in the above and below with dancer (7) junction, and limit base (8) is fixed in wallboard (9).

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