CN110027187B

CN110027187B - Traction device of blow molding equipment

Info

Publication number: CN110027187B
Application number: CN201910468011.5A
Authority: CN
Inventors: 曹玉; 毛潞
Original assignee: Chongqing Ruiting Plastic Co Ltd
Current assignee: Chongqing Ruiting Plastic Co Ltd
Priority date: 2019-05-31
Filing date: 2019-05-31
Publication date: 2021-05-28
Anticipated expiration: 2039-05-31
Also published as: CN110027187A

Abstract

The invention relates to the technical field of film processing, and discloses a traction device of blow molding equipment, which comprises a rack, wherein a base is rotatably connected onto the rack, a traction roller is rotatably connected onto the base, a support is fixedly connected onto the base, a first guide roller and a second guide roller are rotatably connected onto the support, a first support rod is fixedly connected onto the support, a first air roller is rotatably connected onto the first support rod, a second support rod is rotatably connected onto the support, a second air roller is rotatably connected onto the second support rod, an output guide roller is rotatably connected onto the rack, a film sequentially bypasses the first guide roller, the first air roller, the second guide roller, the second air roller and the output guide roller, cavities are respectively formed in the first air roller and the second air roller, the cavities and external air holes are respectively communicated with the first air roller and the second air roller, and an air supply mechanism for supplying air to the first air roller and the second air roller is arranged on the support. The invention can solve the problems of uneven film thickness and poor flatness in film production.

Description

Traction device of blow molding equipment

Technical Field

The invention relates to the technical field of film processing, in particular to a traction device of blow molding equipment.

Background

When the blow molding equipment is used for producing a film, plastic raw materials are extruded through the die head to form a thin-walled tube, the thin-walled tube is pulled upwards, is pressed into a double-layer planar film through the herringbone plate and the traction device, is transmitted through the guide roller, and is finally wound through the winding device. However, the thickness of each point of the thin-walled tube extruded by the die head is difficult to be absolutely uniform, and the thickness deviation belongs to systematic errors, namely if the thin-walled tube extruded from a certain point in the circumferential direction of the die head is thicker, the subsequent thin-walled tube is continuously thicker at the position, on the contrary, if the thin-walled tube extruded from a certain point in the circumferential direction of the die head is thinner, the subsequent thin-walled tube is continuously thinner at the point, so that a rolled thin film is easy to appear, the thick and thin points are gradually accumulated and superposed at the same position, the flatness of the thin film is poor, and the thickness of the rolled thin film roll is seriously uneven, and the rolling quality is poor.

Disclosure of Invention

The invention aims to provide a traction device of blow molding equipment, which aims to solve the problems of uneven film thickness and poor flatness in film production.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows:

blow molding equipment draw gear, which comprises a frame, it is connected with the base to rotate in the frame, it is connected with the carry over pinch rolls to rotate on the base, the rigid coupling has first deflector roll and second deflector roll on the support, the rigid coupling has first branch on the support, it is connected with first air roller to rotate on the first branch, it is connected with second branch to rotate on the support, it is connected with second air roller to rotate on the second branch, it is connected with the output deflector roll to rotate in the frame, first deflector roll is walked around in proper order to the film, first air roller, the second deflector roll, second air roller and output deflector roll, all open the cavity in first air roller and the second air roller, it has intercommunication cavity and external gas pocket to all open on first air roller and the second air roller, be equipped with the air feed mechanism who is used for first air roller and second air roller air feed on the support.

Compared with the prior art, the invention has the following principle and beneficial effects:

1. the base is arranged, the traction roller, the first guide roller, the first air roller and the second guide roller are driven to rotate in a positive and negative alternating mode by utilizing the positive and negative alternating rotation of the base, all points on the film can be fully contacted with the traction roller, the first guide roller, the first air roller and the second guide roller in the rotating process, and the thickness points of the film can be dispersed in the contact process, so that the thickness points are uniformly distributed; in addition, in the rotating process, the contact frequency and the acting force of each point of the film and the roller can be the same, and the phenomenon that the flatness of the film is different due to the fact that a certain point on the film is too large or too small under the action of tension when the film is fixed is avoided, so that the effect of adjusting the flatness of the film is achieved through positive and negative alternate rotation.

2. Set up first air roller and second air roller, utilize first air roller and second air roller to transmit the film, the in-process passes through the gas that air feed mechanism continuously let in certain pressure in to the cavity, and gas will blow out through the through-hole, makes and has certain space between film and the air roller, can enough drive the film transmission this moment, can reduce the frictional force between film and the air roller again, prevents that the film from gluing on the air roller to improve the roughness of film.

Furthermore, a first piston and a second piston are arranged at two ends in the cavity, a through hole for communicating the cavity with the outside is formed in the second piston, and the air supply mechanism supplies air to the cavity through the through hole. Through adjusting the position of first piston and second piston, can adjust the length of the section of giving vent to anger of first gas roller and second gas roller, can adjust this length of section according to actual production needs (the width of produced film) to can make full use of gas reduce the frictional force between film and the gas roller, reduce gaseous waste, thereby reach energy-conserving effect.

Further, the air supply mechanism is a blower. The operation is convenient and easy to obtain.

Furthermore, a first guide pipe is communicated between the air blower and the through hole in the first air roller, a tee joint is arranged on the first guide pipe, a second guide pipe is communicated between the tee joint and the through hole in the second air roller, and the air blower can simultaneously supply air to the first air roller and the second air roller. Through setting up the tee bend, only need use an air-blower can accomplish the air feed of two gas rollers, simplify the overall structure of device.

Furthermore, the support is rotatably connected with a tension roller, and the tension roller is positioned between the traction roller and the first guide roller. The film is tensioned by the tensioning roller, so that the influence on the flatness of a certain section of the film due to the looseness in the transmission process is avoided.

Further, the pulling roll comprises a steel roll and a rubber roll. Utilize the steel roll to drive the rubber roller and rotate, the rubber roller will increase the film and rather than the friction between them to the increase is to the traction force of film, and the film of being convenient for transmits, prevents that the phenomenon of skidding from appearing.

Furthermore, a swing rod is hinged to the rack, the output guide roller is rotatably connected to the swing rod, and a positioning block used for locking the swing rod is arranged on the rack. Through rotating the pendulum rod, adjust the position of output deflector roll to make it can be with the film tensioning, prevent that the film from appearing lax and influencing the roughness of its rolling, adjust the back and lock the pendulum rod through the locating piece, prevent that its position from changing in the transmission course.

Further, a motor is fixedly connected to the frame, a driving wheel is fixedly connected to an output shaft of the motor, and a conveying belt is wound between the base and the driving wheel. Utilize the motor to drive the drive wheel and rotate, the drive wheel will drive the base through the conveyer belt and rotate, and the in-process is through adjusting motor, realizes the just, reverse drive in turn of base.

Furthermore, a limiting groove for installing the conveying belt is formed in the base. Utilize the spacing groove to carry out spacing to the conveyer belt, avoid it from the base landing.

Further, a roller wheel used for tensioning the conveyor belt is rotatably connected to the rack. The roller is used for tensioning the conveyor belt, so that slipping is prevented, and particularly when the forward and reverse alternate rotation is switched.

Drawings

FIG. 1 is a front view of an embodiment of the present invention;

FIG. 2 is a cross-sectional view of a first gas roll in an embodiment of the present invention;

fig. 3 is an enlarged view of a portion a in fig. 2.

Detailed Description

The following is further detailed by way of specific embodiments:

reference numerals in the drawings of the specification include: the device comprises a rack 1, a base 2, a first motor 3, a transmission wheel 4, a conveyor belt 5, a steel roller 6, a rubber roller 7, a support 8, a first guide roller 9, a second guide roller 10, a first support rod 11, a first air roller 12, a second support rod 13, a limiting plate 14, a second air roller 15, a swing rod 16, an output guide roller 17, a tensioning roller 18, a cavity 19, an air hole 20, a first piston 21, a second piston 22, a through hole 23, an air blower 24, a first conduit 25, a tee joint 26 and a second conduit 27.

The embodiment is basically as shown in the attached figures 1 to 3:

mould equipment draw gear, including frame 1, rotate in frame 1 and be connected with base 2 of disc, be equipped with the opening that supplies the film to pass through on the base 2, the rigid coupling has first motor 3 in frame 1, the rigid coupling has drive wheel 4 on the output shaft of first motor 3, the wraparound has conveyer belt 5 between base 2 and the drive wheel 4, it has the spacing groove that is used for installing conveyer belt 5 to open on the base 2, rotate in frame 1 and be connected with the running roller that is used for tensioning conveyer belt 5. The base 2 is rotatably connected with a traction roller, the traction roller comprises a steel roller 6 and a rubber roller 7 which are arranged in an abutting mode, and the base 2 is fixedly connected with a second motor for driving the steel roller 6 to rotate; a bracket 8 is fixedly connected to the base 2, the bracket 8 is rotatably connected to the frame 1, a first guide roller 9 and a second guide roller 10 are rotatably connected to the bracket 8, a first support rod 11 is fixedly connected to the bracket 8, a first air roller 12 is rotatably connected to the first support rod 11, a second support rod 13 is rotatably connected to the bracket 8, limiting plates 14 positioned above and below the second support rod 13 are fixedly connected to the bracket 8 to prevent the second support rod 13 from sliding, and a second air roller 15 is rotatably connected to the second support rod 13; two swing rods 16 are hinged to the rack 1, an output guide roller 17 is rotatably connected between the swing rods 16, a positioning block used for locking the swing rods 16 is fixedly connected to the rack 1, a tensioning roller 18 is rotatably connected to the support 8, and the film sequentially bypasses the traction roller, the tensioning roller 18, the first guide roller 9, the first air roller 12, the second guide roller 10, the second air roller 15 and the output guide roller 17.

The first air roller 12 and the second air roller 15 are both provided with a cavity 19, the first air roller 12 and the second air roller 15 are both provided with air holes 20 for communicating the cavity 19 with the outside, as shown in the combined drawing 2 and the drawing 3, the left end and the right end in the cavity 19 are respectively provided with a first piston 21 and a second piston 22, and the second piston 22 is provided with a through hole 23 for communicating the cavity 19 with the outside; the support 8 is provided with an air supply mechanism for supplying air to the first air roller 12 and the second air roller 15, in this embodiment, the air supply mechanism is an air blower 24, a first conduit 25 is communicated between the air blower 24 and the through hole 23 on the first air roller 12, a tee 26 is installed on the first conduit 25, a second conduit 27 is communicated between the tee 26 and the through hole 23 on the second air roller 15, and the air blower 24 can simultaneously supply air to the first air roller 12 and the second air roller 15.

During specific implementation, the positions of the first piston 21 and the second piston 22 are adjusted according to actual production requirements (namely the width of the film), so that the effective gas outlet length of the first gas roller 12 and the second gas roller 15 is slightly larger than the sum of the width of the film and the moving distance of the film on the gas rollers, the gas out of the cavity 19 can be fully utilized, and the energy consumption of the blower 24 is reduced. The swing rod 16 is rotated, the position of the output guide roller 17 is adjusted, so that the film can be tensioned, the film is prevented from being loosened to influence the rolling flatness of the film, the swing rod 16 is locked through the positioning block after the film is adjusted, and the position of the swing rod is prevented from changing in the transmission process.

The first motor 3 and the second motor are started, the second motor drives the steel roller 6 to rotate, the steel roller 6 drives the rubber roller 7 to rotate through friction force, and therefore driving of the traction roller is achieved, and the traction roller pulls the film. The film passes through the drawing roller, the tensioning roller 18, the first guide roller 9, the first air roller 12, the second guide roller 10 and the second air roller 15 in sequence and is finally output through the output guide roller 17. In the process, the first motor 3 drives the driving wheel 4 to rotate in a positive and negative alternate mode, the driving wheel 4 drives the base 2 to rotate through the conveying belt 5, the base 2 drives the support 8 to rotate, so that the traction roller, the first guide roller 9, the first air roller 12 and the second guide roller 10 are driven to rotate in a positive and negative alternate mode, all points on the film can be in full contact with the traction roller, the first guide roller 9, the first air roller 12 and the second guide roller 10 in the rotating process, the thickness points of the film can be dispersed in the contact process, the film is uniformly distributed, and the phenomenon that the thickness of the film is not uniform is reduced; in the rotating process, the contact frequency and the contact acting force of each point of the film and each roller can be the same, so that the phenomenon that the flatness of the film is different due to the fact that a certain point on the film is too large or too small under the action of tension when the film is fixed is avoided, and the effect of adjusting the flatness of the film is achieved through positive and negative alternate rotation; since the second arm 13 is rotatably connected to the frame 8, the second arm 13 is not rotated when the frame 8 is rotated, so that the second air roller 15 does not rotate with the base 2 and smoothly transfers the film to the output guide roller 17.

Meanwhile, in the process, the air blower 24 is started, the air blower 24 continuously introduces air with certain pressure into the cavities 19 in the first air roller 12 and the second air roller 15 through the first guide pipe 25, the tee joint 26 and the second guide pipe 27 respectively, the air is blown out through the air holes 20, a certain gap is formed between the film and the air rollers, at the moment, the film transmission can be driven, the friction force between the film and the air rollers can be reduced, the film is prevented from being adhered to the air rollers, and therefore the flatness of the film is improved.

The foregoing is merely an example of the present invention and common general knowledge of known specific structures and features of the embodiments is not described herein in any greater detail. It should be noted that variations and modifications can be made by those skilled in the art without departing from the structure of the present invention. These should also be construed as the scope of the present invention, and they should not be construed as affecting the effectiveness of the practice of the present invention or the applicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.

Claims

1. Draw gear of blow molding equipment, including the frame, its characterized in that: the film winding machine is characterized in that a base is rotatably connected to a rack, a traction roller is rotatably connected to the base, a support is fixedly connected to the base, a first guide roller and a second guide roller are rotatably connected to the support, a first support rod is fixedly connected to the support, a first air roller is rotatably connected to the first support rod, a second support rod is rotatably connected to the support, a second air roller is rotatably connected to the second support rod, an output guide roller is rotatably connected to the rack, a film sequentially bypasses the first guide roller, the first air roller, the second guide roller, the second air roller and the output guide roller, cavities are formed in the first air roller and the second air roller, air holes communicating the cavities with the outside are formed in the first air roller and the second air roller, and an air supply mechanism for supplying air to the first air roller and the second air roller is arranged on the; the two ends in the cavity are provided with a first piston and a second piston, the second piston is provided with a through hole for communicating the cavity with the outside, the air supply mechanism supplies air to the cavity through the through hole, the length of the air outlet section of the first air roller and the second air roller can be adjusted by adjusting the positions of the first piston and the second piston, and the length of the air outlet section of the first air roller and the second air roller can be adjusted according to the width of the produced film.

2. The drawing device for a blowing apparatus according to claim 1, characterized in that: the air supply mechanism is an air blower.

3. Drawing device according to claim 2, characterized in that: a first guide pipe is communicated between the air blower and the through hole in the first air roller, a tee joint is arranged on the first guide pipe, a second guide pipe is communicated between the tee joint and the through hole in the second air roller, and the air blower can simultaneously supply air to the first air roller and the second air roller.

4. The drawing device for a blowing apparatus according to claim 1, characterized in that: the support is rotatably connected with a tension roller, and the tension roller is located between the traction roller and the first guide roller.

5. The drawing device of a blowing apparatus according to any one of claims 1 to 4, characterized in that: the pulling roll comprises a steel roll and a rubber roll.

6. The drawing device of a blowing apparatus according to any one of claims 1 to 4, characterized in that: the frame is hinged with a swing rod, the output guide roller is rotatably connected to the swing rod, and the frame is provided with a positioning block for locking the swing rod.

7. The drawing device of a blowing apparatus according to any one of claims 1 to 4, characterized in that: a motor is fixedly connected to the frame, a driving wheel is fixedly connected to an output shaft of the motor, and a conveying belt is wound between the base and the driving wheel.

8. The drawing device for a blowing apparatus according to claim 7, characterized in that: and the base is provided with a limiting groove for mounting a conveying belt.

9. The drawing device for a blowing apparatus according to claim 7, characterized in that: and the rack is rotatably connected with a roller for tensioning the conveying belt.