CN211518445U

CN211518445U - Traction rotating device for avoiding film deviation

Info

Publication number: CN211518445U
Application number: CN201921741526.XU
Authority: CN
Inventors: 陈卫兵; 荣敏; 陈建华; 王涵
Original assignee: Wuhan Xinzhongde Plastic Machinery Co ltd
Current assignee: Wuhan Xinzhongde Plastic Machinery Co ltd
Priority date: 2019-10-17
Filing date: 2019-10-17
Publication date: 2020-09-18
Anticipated expiration: 2029-10-17

Abstract

The utility model discloses an avoid traction rotary device of film off tracking relates to blown film and extrudes the production field, and this traction rotary device includes main shaft, first air cushion roller and second air cushion roller, have certain clearance between first air cushion roller, second air cushion roller and the main shaft, > 0, the diameter of first air cushion roller, second air cushion roller is Y, the outer wall of main shaft and first air cushion roller, the corresponding part of second air cushion roller are provided with first concave arc, the degree of depth of first concave arc with the diameter Y's of first air cushion roller, second air cushion roller size is the same, be provided with the second concave arc for 45 on the main shaft with the rotation angle of first concave arc. The utility model discloses the off tracking volume can be effectively reduced, and then the edge is uneven and the film produces the fold effectively to avoid the membrane to roll up.

Description

Traction rotating device for avoiding film deviation

Technical Field

The utility model relates to a blown film extrudes production field, concretely relates to avoid pulling rotary device of film off tracking.

Background

In order to solve the rib explosion problem in the film winding process, the plastic extrusion film blowing production line generally adopts the following two structural modes: the film forming machine comprises a die head rotating mechanism and a traction rotating mechanism, wherein the two structures are respectively used for enabling a film bubble to rotate around the center in a reciprocating mode in the operation process, so that the thickness points of a film are uniformly distributed along the axis direction, the winding surface of the film is smooth, and rib explosion is eliminated. The defects of easy failure, poor reliability, difficult maintenance and the like of die head rotation are gradually eliminated, and traction rotation becomes a main mode used in the market.

Referring to fig. 1, the traction rotation mechanism comprises a rotation main shaft 1, a first air cushion roller 2, a flattening roller 3, a second air cushion roller 4, a guide roller 5 and a traction device 6, wherein the first air cushion roller 2, the flattening roller 3 and the second air cushion roller 4 are all connected with the main shaft 1 through a differential gear set 7, the traction device 6 is connected with the main shaft 1 through a rotation supporting device 8, when in use, a film 9 is connected with the traction device 6 after passing through the first air cushion roller 2, the flattening roller 3, the second air cushion roller 4 and the guide roller 5 in sequence,

the traction devices 6 are distributed around the rotation center in a staggered manner (the maximum staggered angle is 45 degrees) to horizontally guide the film 9, the traction rotating mechanism has the advantages of reliable transmission, less faults, long service life and the like, and the film lotus leaf edge phenomenon can be effectively eliminated.

However, the film 9 will move along the axial direction when swinging along with the guide roller 5 to generate deviation, if the deviation value is too large, the deviation value will exceed the working range of the deviation correcting device to generate fault and cause the edge of the film roll to be uneven, and the film is easy to wrinkle.

SUMMERY OF THE UTILITY MODEL

To the defect that exists among the prior art, the utility model aims to provide an avoid pulling rotary device of film off tracking can avoid the membrane to roll up the border and uneven and film production fold.

In order to achieve the above purpose, the utility model adopts the technical proposal that:

the utility model provides an avoid traction rotary device of film off tracking, includes main shaft, first air cushion roller and second air cushion roller, there is certain clearance between first air cushion roller, second air cushion roller and the main shaft, > 0, the diameter of first air cushion roller, second air cushion roller is Y, the outer wall of main shaft and the corresponding place of first air cushion roller, second air cushion roller are provided with first concave arc, the degree of depth of first concave arc with the size of the diameter of first air cushion roller, second air cushion roller is the same, be provided with second concave arc with the rotation angle of first concave arc for 45 degrees on the main shaft.

Further, the depth of the second concave arc is the same as the depth of the first concave arc.

Furthermore, the diameters Y of the first air cushion roller and the second air cushion roller, and the depths H of the first concave arc and the second concave arc are both 25 mm.

Furthermore, the intersection of the first concave arc and the second concave arc is an arc surface.

Further, the clearance between the first air cushion roller and the main shaft, the second air cushion roller and the main shaft is 15 mm.

Compared with the prior art, the utility model has the advantages of:

(1) the utility model discloses in avoid the traction rotary device of film off tracking, there is certain clearance between first air cushion roller, second air cushion roller and the main shaft, the outer wall of main shaft and the corresponding part of first air cushion roller, second air cushion roller are provided with first concave arc, the degree of depth of first concave arc with the diameter Y's of first air cushion roller, second air cushion roller size is the same, be provided with the second concave arc for 45 parts with the rotation angle of first concave arc on the main shaft for the eccentricity is apart from L_{Improvement of}0.5X +15-X is 15-0.5X, and the difference between the eccentricity of the present embodiment and the eccentricity of the conventional apparatus is L_{Front side}-L_{Improvement of}The single-side deviation amount X × sin45 can be reduced, the double-side deviation amount 2X × sin45 can be reduced, and therefore the deviation amount is effectively reduced, and the phenomenon that the edges of a film roll are not uniform and the film is wrinkled can be effectively avoided.

Drawings

FIG. 1 is a schematic structural view of a traction rotating device;

fig. 2 is a schematic structural view of the spindle cooperating with the first air cushion roller and the second air cushion roller in the embodiment of the present invention;

FIG. 3 is an enlarged view at B in FIG. 2;

FIG. 4 is a schematic diagram showing the relative positions of the main shaft 1 and the first and second air cushion rollers;

FIG. 5 is a top view of FIG. 4;

fig. 6 is a schematic structural view of the first air cushion roller in fig. 5 after rotating a maximum angle, i.e., 45 °.

In the figure: 1-main shaft, 2-first air cushion roller, 3-flattening roller, 4-second air cushion roller, 5-guide roller, 6-traction device, 7-differential gear set, 8-rotary supporting device, 9-film and 10-first concave arc.

Detailed Description

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

Referring to fig. 1, fig. 2 and fig. 3, the embodiment of the utility model provides an avoid traction rotary device of film off tracking, including main shaft 1, first air cushion roller 2 and second air cushion roller 4, have certain clearance between first air cushion roller 2, second air cushion roller 4 and the main shaft 1, > 0, in this embodiment, the clearance between first air cushion roller 2, second air cushion roller 4 and the main shaft 1 is 15 mm.

The diameter of the main shaft 1 is X, the diameters of the first air cushion roller 2 and the second air cushion roller 4 are Y, a first concave arc 10 (shown in an enlarged view at the position B in the figure 2) is arranged at the position, corresponding to the first air cushion roller 2 and the second air cushion roller 4, of the outer wall of the main shaft 1, the depth of the first concave arc 10 is the same as the diameter Y of the first air cushion roller 2 and the second air cushion roller 4, a second concave arc is arranged at the position, rotating angle of +/-45 degrees with the first concave arc 10, of the main shaft 1, the depth of the second concave arc is the same as the depth of the first concave arc 10, and the intersection position of the first concave arc 10 and the second concave arc is an arc surface.

The embodiment of the utility model provides an in, the degree of depth of first concave arc 10, the second concave arc is 25mm for diameter Y of first air cushion roller 2, second air cushion roller 4.

Referring to fig. 4 to 6, a schematic view of a conventional traction mechanism is shown, and fig. 4 shows a main shaft 1 and a first shaftThe relative position of the air cushion roller 2 and the second air cushion roller 4 is schematically shown, fig. 5 is a top view of fig. 4, fig. 6 is a structural schematic diagram of the first air cushion roller 2 in fig. 5 after rotating at the maximum angle, namely 45 degrees, and the eccentricity L is the same when the conventional traction rotating device is in use (except that the first concave arc 10 and the second concave arc are not arranged and other conditions are the same)_{Front side}0.5X +15, single side deflection B_{Front side}＝L×sin45°＝1.414×L。

Referring to fig. 4 to 6, the present invention sets the first concave arc 10 and the second concave arc by leaving a certain gap between the first air cushion roller 2, the second air cushion roller 4 and the main shaft 1, so that the eccentricity L is obtained_{Improvement of}0.5X +15-X is 15-0.5X, and the difference between the eccentricity of the present embodiment and the eccentricity of the conventional apparatus is L_{Front side}-L_{Improvement of}The difference delta B of the unilateral deviation amount is X × sin45 degrees, namely the unilateral deviation amount X × sin45 degrees can be reduced, the bilateral deviation amount 2X × sin45 degrees can be reduced,

specifically, the eccentric distance L in the present embodiment_{Improvement of}0.5X +15-25 is 0.5X-10, and the difference of eccentricity between the present embodiment and the conventional device is L_{Front side}-L_{Improvement of}25, the difference delta B of the unilateral deviation amount is 25 × sin45 degrees is 35, namely the unilateral deviation amount can be reduced by 35mm, and the bilateral deviation amount is reduced by 70mm, so that the deviation amount is effectively reduced, and the phenomenon that the edges of a film roll are uneven and the film folds can be effectively avoided.

The present invention is not limited to the above preferred embodiments, and any person can obtain other products in various forms without departing from the scope of the present invention, but any change in shape or structure is within the scope of protection.

Claims

1. The utility model provides an avoid pulling rotary device of film off tracking, includes main shaft (1), first air cushion roller (2) and second air cushion roller (4), its characterized in that: the novel air cushion roller is characterized in that certain gaps are formed among the first air cushion roller (2), the second air cushion roller (4) and the main shaft (1) and are larger than 0, the diameters of the first air cushion roller (2) and the second air cushion roller (4) are Y, first concave arcs (10) are arranged at the positions, corresponding to the outer wall of the main shaft (1), of the first air cushion roller (2) and the second air cushion roller (4), the depth of each first concave arc (10) is the same as the diameter Y of the first air cushion roller (2) and the diameter of the second air cushion roller (4), and second concave arcs are arranged at the positions, rotating angles of the main shaft (1) and the first concave arcs (10) are +/-45 degrees.

2. The traction rotating device for preventing the film from deviating as claimed in claim 1, wherein: the depth of the second concave arc is the same as the depth of the first concave arc (10).

3. The traction rotating device for preventing the film from deviating as claimed in claim 1, wherein: the diameters Y of the first air cushion roller (2) and the second air cushion roller (4), and the depths of the first concave arc (10) and the second concave arc are both 25 mm.

4. The traction rotating device for preventing the film from deviating as claimed in claim 1, wherein: the intersection of the first concave arc (10) and the second concave arc is an arc surface.

5. The traction rotating device for preventing the film from deviating as claimed in claim 1, wherein: the gaps between the first air cushion roller (2), the second air cushion roller (4) and the main shaft (1) are 15 mm.