CN210148673U

CN210148673U - PVDC film bubble torsion device

Info

Publication number: CN210148673U
Application number: CN201920969384.6U
Authority: CN
Inventors: 申振锁
Original assignee: Zhengzhou New Printing Co Ltd
Current assignee: Zhengzhou New Printing Co Ltd
Priority date: 2019-06-26
Filing date: 2019-06-26
Publication date: 2020-03-17
Anticipated expiration: 2029-06-26

Abstract

A PVDC bubble twisting device is used for assisting in twisting and forming of PVDC bubbles and comprises a left swinging roller and a right swinging roller and a carrier roller positioned between the two swinging rollers, wherein swinging shafts of the left swinging roller and the right swinging roller are arranged coaxially; the PVDC film bubble is placed on the carrier roller and is positioned between the left and right swing rollers, the swing surfaces of the left and right swing rollers are parallel to the axis of the PVDC film bubble, and the two swing rollers are always in extrusion contact with the PVDC film bubble in the swing process. When the left and right rocking rollers rock in the same direction at a fixed included angle, the two rocking rollers are always positioned at two sides of the interface; when the left and right rocking rollers rock reversely, the left and right rocking rollers are always positioned at the same side of the interface. The utility model discloses creatively with two kinds of modes of swaing of two swaing roller realize the reciprocal rotation of PVDC membrane bubble, but diversification, multipath ground revise membrane bubble wall thickness inhomogeneities, make PVDC film wall thickness even, perfect of producing.

Description

PVDC film bubble torsion device

Technical Field

The utility model belongs to the technical field of PVDC film manufacturing and specifically relates to a PVDC membrane bubble torsion device is related to.

Background

PVDC (a chinese name: polyvinylidene chloride) is widely used for packaging in the fields of sheets, pipes, foods and the like because of its characteristics such as high barrier property, high toughness, good heat shrinkability and chemical stability. In PVDC film production, molten material is extruded through a die into a PVDC film bubble, which causes a variation in thickness of the PVDC film when the material is blown into the PVDC film bubble due to a slight difference in the flowability of the material at the die.

At present, the problem is solved by making the PVDC bubble twist back and forth when it is blown up, so as to make the difference of material fluidity at the die uniform. The general mode is to realize the integral axial torsion of the PVDC film bubble by adopting a rotary die head, a rotary winding frame or a sizing rotary disc.

The rotating die head scheme is prone to leakage; the scheme of rotating the winding frame easily causes uneven winding; according to the scheme of the fixed-diameter rotating disc, the friction force of the roller to the film bubble is insufficient, and slipping is easily caused. The above modes are not ideal, and the problems of complex structure and inconvenient operation exist.

In addition, the twisting modes of the PVDC film bubble in the modes are realized through the rotating disc and the rotating mechanism, the rotating disc is closed, a film belt penetrates through an inner hole of the rotating disc, and particularly, the mode for realizing the angle twisting of the film bubble is not good, and the correction of the non-uniformity of the wall thickness of the film bubble cannot be variously and variously coped with, so that the produced PVDC film cannot reach a perfect state on the uniformity of the wall thickness.

SUMMERY OF THE UTILITY MODEL

In order to overcome the deficiency in the background art, the utility model discloses a PVDC membrane bubble torsion device.

In order to realize the purpose of the utility model, the utility model adopts the following technical scheme:

a PVDC bubble twisting device is used for assisting in twisting and forming of PVDC bubbles and comprises a left swinging roller and a right swinging roller and a carrier roller positioned between the two swinging rollers, wherein swinging shafts of the left swinging roller and the right swinging roller are arranged coaxially; the PVDC film bubble is placed on the carrier roller and is positioned between the left and right swing rollers, the swing surfaces of the left and right swing rollers are parallel to the axis of the PVDC film bubble, and the two swing rollers are always in extrusion contact with the PVDC film bubble in the swing process;

the cross section of the PVDC film bubble passing through the swing shaft is taken as an interface, and when the left swing roller and the right swing roller swing in the same direction at a fixed included angle, the two swing rollers are always positioned at two sides of the interface; when the left and right rocking rollers rock reversely, the left and right rocking rollers are always positioned at the same side of the interface.

Preferably, when the left and right swinging rollers swing in the same direction at a fixed included angle, the fixed included angle is A, and the angle is 60 degrees < A <90 degrees.

Preferably, when the left and right oscillating rollers oscillate reversely, the oscillating angle of the oscillating roller is B, and B <70 °.

Preferably, the roller surface of the carrier roller is made of polytetrafluoroethylene.

Preferably, a speed reducer and a servo motor are sequentially connected to the swing shaft of each swing roller, and the servo motor drives the swing rollers to swing in the same direction or in the opposite direction under the control of the controller.

Preferably, the left rocking roller, the speed reducer and the servo motor connected with the left rocking roller are arranged on the sliding table, and the right rocking roller, the speed reducer and the servo motor connected with the right rocking roller are arranged on the sliding table.

Preferably, the sliding table and the sliding table are respectively provided with a carrier roller, and the carrier rollers can roll along the advancing direction of the PVDC film bubble.

Preferably, the device also comprises a base, wherein a bidirectional screw is arranged on the base, the sliding table and the sliding table are respectively arranged at two ends of the bidirectional screw, and the sliding table can move reversely by rotating the bidirectional screw.

Preferably, a caster for movement is further provided on the base.

Preferably, the controller is mounted on the base.

Owing to adopt above-mentioned technical scheme, compare the background art, the utility model discloses following beneficial effect has:

the utility model discloses creatively realizes the reciprocal rotation of PVDC membrane bubble with two kinds of modes of swaing of two swashplate rollers. The device breaks through the prior closed type membrane bubble torsion device, and the upper end of the PVDC membrane bubble is not closed, so that the membrane band does not need to be penetrated with a membrane, and the operation is simpler.

The controller can control the rotating speed, the steering direction, the angle, the rotating frequency and the start-stop position of the two swing rollers at will, realize various combinations of control parameters, and can modify the unevenness of the wall thickness of the film bubble in a diversified and multi-way manner, so that the wall thickness of the produced PVDC film is uniform and perfect.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic diagram of a left swing roller and a right swing roller which are positioned on two sides of an interface and swing clockwise in the same direction at a fixed included angle;

FIG. 3 is a schematic diagram of a left swing roller and a right swing roller which are positioned on the same side of an interface and swing clockwise in the same direction at a fixed included angle;

FIG. 4 is a schematic view of a left swing roller and a right swing roller which are positioned on the same side of an interface and swing reversely;

FIG. 5 is a schematic diagram of the left and right rocking rollers located on two sides of the interface and rocking in opposite directions.

In the figure: 1. a PVDC bubble; 2. shaking the roller; 3. a carrier roller; 4. a controller; 5. a servo motor; 6. a left slipway; 7. a right sliding table; 8. a machine base; 9. a bidirectional lead screw; 10. an interface.

Detailed Description

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention. It should be noted that in the description of the present invention, the terms "front", "back", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate directions or positional relationships based on those shown in the drawings, which are merely for convenience of description, but do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may include, for example, a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

A PVDC film bubble twisting device is used for assisting the twisting forming of a PVDC film bubble 1, and comprises a left swinging roller 2 and a right swinging roller 2 and a carrier roller 3 positioned between the two swinging rollers 2, wherein the swinging shafts of the left swinging roller 2 and the right swinging roller 2 are coaxially arranged; the PVDC film bubble 1 is placed on the carrier roller 3 and is positioned between the left and right swing rollers 2, the swing surfaces of the left and right swing rollers 2 are parallel to the axis of the PVDC film bubble 1, and the two swing rollers 2 are always in extrusion contact with the PVDC film bubble 1 in the swing process.

The cross section of the PVDC film bubble 1 passing through the swing shaft is taken as an interface 10, and when the left swing roller 2 and the right swing roller 2 swing in the same direction at a fixed included angle, the two swing rollers 2 are always positioned at two sides of the interface 10; when the left and right rocking rollers 2 rock reversely, the left and right rocking rollers 2 are always positioned at the same side of the interface 10.

As shown in fig. 2, the two left and right swing rollers 2 are located at two sides of the interface 10 and swing clockwise and in the same direction at a fixed included angle, the swing roller 2 at the left side of the interface 10 rubs the outer side of the PVDC bubble 1 to rotate upwards, and the swing roller 2 at the right side of the interface 10 rubs the inner side of the PVDC bubble 1 to rotate downwards, so that the PVDC bubble 1 rotates in the direction shown in the figure. In a similar way, when the left and right swinging rollers 2 swing anticlockwise at a fixed included angle, the PVDC film bubble 1 rotates reversely.

As shown in fig. 3, if the left and right oscillating rollers 2 are both on the same side of the interface 10 and oscillate clockwise or counterclockwise in the same direction at a fixed included angle, the directions of the twisting forces applied to the inner and outer sides of the PVDC film bubble 1 are the same, and the PVDC film bubble 1 cannot be rotated.

As shown in fig. 4, when the left and right oscillating rollers 2 are located on the same side of the interface 10 and oscillate in opposite directions, the outer oscillating roller 2 oscillates clockwise, the outer side of the PVDC bubble 1 is twisted to rotate downward, the inner oscillating roller 2 oscillates counterclockwise, and the inner side of the PVDC bubble 1 is twisted to rotate upward, so that the PVDC bubble 1 rotates in the direction shown in the figure. Similarly, the outer side swing roller 2 swings anticlockwise, the outer side of the rubbing PVDC film bubble 1 rotates upwards, the inner side swing roller 2 swings clockwise, the inner side of the rubbing PVDC film bubble 1 rotates downwards, and the PVDC film bubble 1 rotates reversely.

As shown in fig. 5, if the left and right oscillating rollers 2 are respectively located at two sides of the interface 10 and oscillate in opposite directions, the outer oscillating roller 2 oscillates clockwise, the outer side of the rubbed PVDC bubble 1 rotates upward, the inner oscillating roller 2 oscillates counterclockwise, the inner side of the rubbed PVDC bubble 1 rotates upward, and the PVDC bubble 1 cannot rotate. Otherwise, the same principle is applied.

The fixed included angle of the left and right swinging rollers 2 cannot be too large or too small, the swinging angle can be reduced when the fixed included angle is too large or too small, the optimal fixed included angle is A, and the angle is 60 degrees < A <90 degrees. Similarly, when the left and right oscillating rollers 2 oscillate in opposite directions, the oscillation angle of the oscillating roller 2 is generally not greater than 70 °.

In this embodiment, the swinging motion of the swinging roller 2 is realized by connecting a speed reducer and a servo motor 5 to the swinging shaft, and the servo motor 5 drives the swinging roller 2 to swing in the same direction or in the opposite direction under the control of the controller 4. The servo motor 5 has the advantage that the rotation speed, the steering direction, the angle, the rotation frequency and the start-stop position of the swinging roller 2 can be controlled at will. The left and right rocking rollers 2 are respectively connected with the two servo motors 5, so that various combinations of the two rocking rollers 2 in various aspects such as rotating speed, steering, angle, rotating frequency, starting and stopping positions and the like can be realized, the rotating angle of the PVDC film bubble 1 can be better controlled, and the wall thickness of the produced PVDC film is uniform.

In order to realize that the extrusion diameter of the PVDC film bubble 1 is adjustable, the left swinging roller 2, the speed reducer and the servo motor 5 connected with the left swinging roller are arranged on the left sliding table 6, and the right swinging roller 2, the speed reducer and the servo motor 5 connected with the right swinging roller are arranged on the right sliding table 7. The left sliding table 6 and the right sliding table 7 are arranged on the guide rail, the left sliding table 6 and the right sliding table 7 are respectively connected to two ends of a bidirectional screw rod 9, and the bidirectional screw rod 9 is rotated, so that the left sliding table 6 and the right sliding table 7 can move reversely along the guide rail. When the diameter of the PVDC film bubble 1 is large or small, the bidirectional screw 9 is rotated, so that the left and right oscillating rollers 2 can extrude the PVDC film bubble 1 at a proper distance.

The PVDC bubble 1 is placed on the carrier roller 3, and plays a supporting role for the PVDC bubble 1. In order to protect the PVDC film bubble 1 from being damaged, the roller surface of the carrier roller 3 is made of a polytetrafluoroethylene material. In this embodiment, the number of the carrier rollers 3 is two, and the carrier rollers are respectively arranged on the left sliding table 6 and the right sliding table 7, and the carrier rollers 3 are arranged along the advancing direction of the PVDC film bubble 1, so that the advancing resistance of the PVDC film bubble 1 is reduced.

Two-way lead screw 9 sets up on frame 8, installs controller 4 on frame 8 to and be used for the truckle of removal, it is convenient the utility model discloses a removal adjustment.

The controller can control the rotating speed, the steering direction, the angle, the rotating frequency and the start-stop position of the two swinging rollers at will, realize various combinations of control parameters, and can control the rotating angle of the PVDC film bubble in a diversified and multi-way manner, so that the wall thickness of the produced PVDC film is uniform and perfect.

The part of the utility model not detailed is prior art. Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A PVDC bubble twisting device is used for assisting twisting forming of a PVDC bubble (1), and is characterized in that: the device comprises a left swinging roller (2) and a right swinging roller (2) and a carrier roller (3) positioned between the two swinging rollers (2), wherein swinging shafts of the left swinging roller (2) and the right swinging roller (2) are arranged coaxially; the PVDC film bubble (1) is placed on the carrier roller (3) and is positioned between the left and right swing rollers (2), the swing surfaces of the left and right swing rollers (2) are parallel to the axis of the PVDC film bubble (1), and the two swing rollers (2) are always in extrusion contact with the PVDC film bubble (1) in the swing process;

the cross section of the PVDC film bubble (1) passing through the swing shaft is taken as an interface (10), and when the left swing roller and the right swing roller (2) swing in the same direction at a fixed included angle, the two swing rollers (2) are always positioned at two sides of the interface (10); when the left and right rocking rollers (2) rock reversely, the left and right rocking rollers (2) are always positioned at the same side of the interface (10).

2. The PVDC bubble twisting apparatus of claim 1, wherein: when the left and right rocking rollers (2) rock in the same direction at a fixed included angle, the fixed included angle is A, and the angle is 60 degrees < A <90 degrees.

3. The PVDC bubble twisting apparatus of claim 1, wherein: when the left and right rocking rollers (2) rock reversely, the rocking angle of the rocking rollers (2) is B, and B is less than 70 degrees.

4. The PVDC bubble twisting apparatus of claim 1, wherein: the roller surface of the carrier roller (3) is made of polytetrafluoroethylene.

5. A PVDC bubble twisting apparatus according to any one of claims 1 to 4, wherein: the swing shaft of each swing roller (2) is sequentially connected with a speed reducer and a servo motor (5), and the servo motor drives the swing rollers (2) to swing in the same direction or in the opposite direction under the control of the controller (4).

6. The PVDC bubble twisting apparatus of claim 5, wherein: the left rocking roller (2) and the speed reducer and the servo motor (5) connected with the left rocking roller are arranged on the left sliding table (6), and the right rocking roller (2) and the speed reducer and the servo motor (5) connected with the right rocking roller are arranged on the right sliding table (7).

7. The PVDC bubble twisting apparatus of claim 6, wherein: and carrier rollers (3) are respectively arranged on the left sliding table (6) and the right sliding table (7), and the carrier rollers (3) can roll along the advancing direction of the PVDC film bubble (1).

8. A PVDC bubble twisting apparatus according to claim 6 or claim 7, wherein: the automatic sliding mechanism is characterized by further comprising a base (8), wherein a bidirectional lead screw (9) is arranged on the base (8), the left sliding table (6) and the right sliding table (7) are respectively arranged at two ends of the bidirectional lead screw (9), and the bidirectional lead screw (9) is rotated to enable the left sliding table (6) and the right sliding table (7) to move in the opposite direction.

9. The PVDC bubble twisting apparatus of claim 8, wherein: the base (8) is also provided with a caster wheel for moving.

10. The PVDC bubble twisting apparatus of claim 8, wherein: the controller (4) is arranged on the machine base (8).