CN116409661A - A flexible tension control device for a film roll of a blown film machine - Google Patents

Abstract

The invention discloses a flexible tension control device for a film roll of a film blowing machine, which relates to the field of blow molding equipment and includes: a swing arm, one end of which is hinged to the frame of the film blowing machine, and a tension roller is arranged on the swing arm, and the tension roller The roller is used to roll and cooperate with one side of the film material; two guide rollers are set on the frame, and the film material passes around one guide roller, tension roller and another guide roller in turn, and the two guide rollers are used to cooperate with the film material The other side of the rolling fit; the frame is also provided with a spring mechanism for pressing the tension roller on the film material. The invention can flexibly adjust the tension degree of the membrane material during the winding process of the membrane material; when the membrane material is relatively loose, the spring mechanism can drive the tension roller to press on the membrane material, thereby increasing the tension of the membrane material, When the tension of the membrane material is high, the spring mechanism will shrink through the tension roller and the swing arm, thereby reducing the tension of the membrane material, so as to realize the flexibility of the tension degree of the membrane material during the winding process of the membrane material. adjust.

Description

A flexible tension control device for a film roll of a blown film machine

technical field

The invention relates to the field of blow molding equipment, in particular to a flexible tension control device for a film roll of a blown film machine.

Background technique

The existing film blowing machine technology is relatively mature. Polyethylene film generally needs to be stirred, melted, and extruded from the film port to blow into a complete film bubble. The cut film material is rewound. Since the film roll needs to be cooled for a period of time before it can be cut and rewound, the film blowing machine is generally set up as a tower structure, usually at a height of 5-10m, or even higher. The winding roller at the top of the film machine is wound, and then guided by multiple guide rollers to transport the film material to the ground for final winding. However, due to the long conveying distance, the winding roller at the top and the winding roller at the bottom The speed is difficult to keep consistent, and it is prone to differential speed. If the top speed is greater than the bottom speed, it is easy to cause the membrane material to be too slack. If the top speed is lower than the bottom speed, it is easy to cause excessive tension, and the membrane material is easy to pull and eventually damage the membrane material. Therefore, based on this, a flexible tension control device for the film roll of the blown film machine is proposed.

Contents of the invention

The object of the present invention is to provide a flexible tension control device for a film roll of a blown film machine, to solve the above-mentioned problems in the prior art, and to flexibly adjust the tension degree of the film material.

To achieve the above object, the present invention provides the following scheme:

The invention provides a flexible tension control device for a film roll of a film blowing machine, comprising:

A swing arm, one end of the swing arm is hinged to the frame of the film blowing machine, and a tension roller is arranged on the swing arm, and the tension roller is used to roll and cooperate with one side of the film material;

Two guide rollers arranged on the frame, the film material passes around one of the guide rollers, the tension roller and the other guide roller in turn, and the two guide rollers are used to communicate with the Rolling fit on the other side of the membrane;

The frame is also provided with a spring mechanism for pressing the tension roller on the film material.

Preferably, the spring mechanism adopts a gas spring, the cylinder body of the gas spring is hinged to the frame, and the free end of the piston rod of the gas spring is hinged to the swing arm.

Preferably, it also includes a linear displacement sensor connected with the controller signal of the film blowing machine, the linear displacement sensor is used to detect the stroke of the piston rod of the gas spring, and the controller can The feedback signal is used to control and adjust the film winding drive mechanism on the film blowing machine.

Preferably, the linear displacement sensor is a potentiometer type linear displacement sensor, the main body of the linear displacement sensor is fixedly connected to the cylinder body of the gas spring, and the brush of the linear displacement sensor is fixedly connected to the piston rod.

Preferably, the frame is further provided with two limit blocks for limiting the swing angle of the swing arm, and the swing arm is located between the two limit blocks.

Preferably, the film rewinding drive mechanism includes an unwinding motor and a winding motor;

The delivery motor is used to drive the rotation of the delivery rotation roller, and the delivery guide roller is arranged on the frame, and the delivery guide roller and the delivery rotation roller clamp the film material;

The winding motor is used to drive the winding rotating roller to rotate, and the film roll is arranged on the frame, and the film material is wound on the winding rotating roller and finally wound on the film rolling.

Compared with the prior art, the present invention has achieved the following technical effects:

The spring mechanism in the film roll flexible tension control device of the film blowing machine of the present invention can flexibly adjust the tension degree of the film material during the film material winding process.

When the membrane material is relatively loose, the spring mechanism can drive the tension roller to press on the membrane material, so that the tension of the membrane material is increased. When the tension of the membrane material is high, the spring mechanism will be contracted through the tension roller and the swing arm. Therefore, the tension of the membrane material is reduced, thereby realizing the flexible adjustment of the tension degree of the membrane material during the winding process of the membrane material.

Further, when the film material is too loose (that is, the tension is too small) or too tight (that is, the tension is too large), the spring mechanism will be in the maximum stroke and the minimum stroke respectively, and the linear displacement sensor can detect the stroke of the spring mechanism Feedback to the controller of the film blowing machine, when the stroke of the spring mechanism exceeds the set range, the controller will control the winding motor and the feeding motor to adjust the corresponding speed, so as to control the degree of relaxation of the film material, that is, to realize the The adjustment of the tension of the film material avoids the phenomenon that the film material is too loose or the film material tension is too large during the film material winding process of the blown film machine.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings required in the embodiments. Obviously, the accompanying drawings in the following description are only some of the present invention. Embodiments, for those of ordinary skill in the art, other drawings can also be obtained according to these drawings without paying creative labor.

Fig. 1 is a structural schematic diagram of the film roll flexible tension control device of the film blowing machine of the present invention;

Fig. 2 is a partial enlarged view of place A in Fig. 1;

Among them, 1. Membrane material; 2. Swing arm; 3. Limit block; 4. Tension roller; 5. Linear displacement sensor; 6. Gas spring; 7. First reducer; 8. Film roll; 9. One articulated shaft; 10, the first guide roller; 11, the third articulated shaft; 12, the second guide roller; 13, the third guide roller; 14, the fourth guide roller; 15, the fifth guide roller; 16, winding Rotary roller; 17, broadcast motor; 18, broadcast rotary roller; 19, broadcast guide roller; 20, winding motor; 21, second reducer; 22, second hinged shaft.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

The object of the present invention is to provide a flexible tension control device for a film roll of a blown film machine, to solve the above-mentioned problems in the prior art, and to flexibly adjust the tension degree of the film material.

In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

As shown in Figures 1-2, this embodiment provides a flexible tension control device for a film roll of a film blowing machine, including a swing arm 2 and a spring mechanism.

Wherein, the top of the swing arm 2 is hinged with the frame of the film blowing machine through the first hinge shaft 9, and the swing arm 2 is provided with a tension roller 4; The axes are parallel, but the tension roller 4 cannot be coaxial with the first hinge shaft 9 , and the tension roller 4 is preferably arranged at the bottom end of the swing arm 2 .

Two guide rollers are arranged on the frame, respectively the first guide roller 10 and the second guide roller 12, and the film material 1 bypasses the first guide roller 10, the tension roller 4 and the second guide roller 12 successively, and the tension The roller 4 is used for rolling cooperation with one side of the film material 1 , while the first guide roller 10 and the second guide roller 12 are used for rolling cooperation with the other side of the film material 1 .

The frame is also provided with a spring mechanism for pressing the tension roller 4 on the film material 1 .

In this embodiment, the spring mechanism adopts the gas spring 6, the cylinder body of the gas spring 6 is hinged with the frame through the second hinge shaft 22, and the free end of the piston rod of the gas spring 6 is hinged with the swing arm 2 through the third hinge shaft 11 . It is worth noting that, based on the perspective of FIG. 1 , since the spring mechanism plays the role of pressing the tension roller 4 on the film material 1, the spring mechanism can be arranged on the left side of the swing arm 2 in theory. The side can also be arranged on the right side of the swing arm 2, as long as the spring mechanism can make the tension roller 4 pressed against the membrane material 1; but since the spring mechanism in this embodiment adopts the gas spring 6, it is necessary to make the membrane material 1 When the tension is too large, the gas spring 6 is given pressure instead of elastic force, so the spring mechanism in this embodiment needs to be arranged on the left side of the swing arm 2. In summary, the gas spring 6 and the first guide roller 10, the second The guide roller 12 should be on the same side of the swing arm 2 .

The film blowing machine film volume 8 flexible tension control device of this embodiment also includes a linear displacement sensor 5 connected with the controller signal of the film blowing machine. The linear displacement sensor 5 is used to detect the stroke of the piston rod of the gas spring 6, and the controller can according to The feedback signal of the linear displacement sensor 5 controls and adjusts the winding driving mechanism of the film material 1 on the film blowing machine.

The film material 1 rewinding drive mechanism should at least include a feeding motor 17 and a winding motor 20; The output shaft of the device 7 is fixedly connected with the rotating shaft of the delivery rotary roller 18. The delivery motor 17 can drive the delivery rotation roller 18 to rotate. The frame is provided with a delivery guide roller 19, and the delivery guide roller 19 and the delivery rotation roller 18 guide the film 1 is clamped to provide a certain tension for the membrane material 1.

The winding motor 20 is arranged on the bottom of the film blowing machine, the output shaft of the winding motor 20 is connected with the input shaft of the second speed reducer 21, the output shaft of the second speed reducer 21 is fixedly connected with the rotating shaft of the winding rotating roller 16, and the winding The winding motor 20 can drive the winding rotating roller 16 to rotate when it works, and the film roll 8 is arranged on the frame.

In this embodiment, the third guide roller 13, the fourth guide roller 14 and the fifth guide roller 15 are also arranged on the frame of the film blowing machine, and the film material 1 is fed from between the delivery guide roller 19 and the delivery rotary roller 18. After passing through, the first guide roller 10, the tension roller 4, the second guide roller 12, the third guide roller 13, the fourth guide roller 14, the fifth guide roller 15 and the winding guide roller are sequentially bypassed, and the final winding On film roll 8.

The linear displacement sensor 5 adopts a potentiometer type linear displacement sensor 5, the main body of the linear displacement sensor 5 is connected with the cylinder body of the gas spring 6, and the brush of the linear displacement sensor 5 is connected with the piston rod. The potentiometer-type linear displacement sensor 5 is a very mature component in the prior art, and its structure and principle will not be described in detail in this embodiment.

Two limit blocks 3 for limiting the swing angle of the swing arm 2 are also arranged on the frame, and the swing arm 2 is located between the two limit blocks 3 .

The specific working process of the film blowing machine film roll 8 flexible tension control device in this embodiment is as follows:

When the equipment is empty, the gas spring 6 pushes the swing arm 2 to the position close to the right limit block 3, and the linear displacement sensor 5 is at the longest end position. When the device starts to work, because the membrane material 1 has a certain tension, the swing arm 2 The position is kept at the center of the two limit blocks 3. When there is a speed difference between the top and the bottom of the film blowing machine winding system, the swing arm 2 will gradually move left and right with the increase or decrease of the tension. The limit block 3 It is used to control the range of movement and avoid excessive range. The gas spring 6 can provide a certain buffer force to play the role of flexible buffer.

In the middle state, the swing arm 2 moves left and right with the tension of the membrane material 1 and the resistance of the gas spring 6. When the swing arm 2 moves to the left, the tension decreases, and when the swing arm 2 moves to the right, the tension increases appropriately.

At the same time, since the linear displacement sensor 5 is provided, when the swing arm 2 is close to the right limit block 3 and the linear displacement sensor 5 is at the longest end position, it means that the tension of the bottom winding mechanism is too small at this time, and the linear displacement sensor 5. Send a signal to the film blowing machine control module to increase the winding motor 20 and/or reduce the rotation speed of the unwinding motor 17, so as to increase the tension of the film material 1.

When the swing arm 2 is close to the left limit block 3 and the linear displacement sensor 5 is at the shortest side position, it means that the tension of the bottom winding mechanism is too large at this time. At this time, the linear displacement sensor 5 sends a signal to the film blowing machine control module to reduce The winding motor 20 and/or increase the rotation speed of the unwinding motor 17 to reduce the tension of the film material 1 .

It should be noted that with the operation of the equipment, the radial dimension of the film roll 8 will become larger and larger. In the film blowing machine, the two ends of the film roll 8 are respectively compressed by a telescopic rod of a cylinder, so that the film roll 8 can be attached to the rewinding rotating roller 16. When the radial size of the film roll 8 becomes larger, the telescopic rods of the two cylinders will be compressed back to adapt to the change of the radial size of the film roll 8. This is the blown film The existing structural design in the machine is only briefly described in this embodiment, and will not be repeated.

In the present invention, specific examples have been used to illustrate the principle and implementation of the present invention. The description of the above embodiments is only used to help understand the method and core idea of the present invention; meanwhile, for those of ordinary skill in the art, according to the present invention The idea of the invention will have changes in the specific implementation and scope of application. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims (6)

1. A film roll flexible tension control device of a film blowing machine, comprising:

one end of the swing arm is hinged with the frame of the film blowing machine, and a tensioning roller is arranged on the swing arm and is used for rolling fit with one side of the film;

the film material sequentially bypasses one guide roller, the tensioning roller and the other guide roller, and the two guide rollers are used for being in rolling fit with the other side of the film material;

the frame is also provided with a spring mechanism for enabling the tension roller to be pressed on the membrane material.

2. The film roll flexible tension control device of the film blowing machine according to claim 1, wherein: the spring mechanism adopts a gas spring, a cylinder body of the gas spring is hinged with the frame, and the free end of a piston rod of the gas spring is hinged with the swing arm.

3. The film roll flexible tension control device of film blowing machine according to claim 2, wherein: the film winding device comprises a film blowing machine, a film winding driving mechanism, a linear displacement sensor, a film blowing machine and a film winding driving mechanism, wherein the film blowing machine is characterized by further comprising the linear displacement sensor which is in signal connection with a controller of the film blowing machine, the linear displacement sensor is used for detecting the stroke of a piston rod of the gas spring, and the controller can control and regulate the film winding driving mechanism on the film blowing machine according to a feedback signal of the linear displacement sensor.

4. A film roll flexible tension control device of a film blowing machine as defined in claim 3, wherein: the linear displacement sensor is a potentiometer type linear displacement sensor, the main body of the linear displacement sensor is fixedly connected with the cylinder body of the gas spring, and the electric brush of the linear displacement sensor is fixedly connected with the piston rod.

5. A film roll flexible tension control device of a film blowing machine as defined in claim 3, wherein: the swing arm is characterized in that two limiting blocks used for limiting the swing angle of the swing arm are further arranged on the frame, and the swing arm is located between the two limiting blocks.

6. A film roll flexible tension control device of a film blowing machine as defined in claim 3, wherein: the film material rolling driving mechanism comprises a delivering motor and a rolling motor;

the discharging motor is used for driving the discharging rotating roller to rotate, the frame is provided with a discharging guide roller, and the discharging guide roller and the discharging rotating roller clamp the film material;

the winding motor is used for driving the winding rotating roller to rotate, a film roll is arranged on the frame, and the film material is wound on the winding rotating roller and finally wound on the film roll.

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