JPS62201760A - Wind-up device for band-like material such as film - Google Patents

Abstract

PURPOSE:To prevent creases, concavities and convexities, scratches and the like, by forming several air blow-off holes in the periphery of a retainer roll making in contact with a band-like material. CONSTITUTION:When a band-like material is wound up into a roll-like form, in order to prevent a deviation in wind-up, creases and the like, compressed air or high temperature air is jetted onto a sheet-like material 7 from the inside of a porous retainer roll 10 through an air blow-off port 10a, the roll 10 being made into contact with the material 7 to be wound on a mill roll 1. The pressure of air jetted onto the material 7 differs in dependence upon the characteristic of the band-like material to be wound, and therefore, the adjustment is made by a discharge air pressure setting dial 14, and a discharged air pressure regulating valve 15 or the like. The porous retainer roll 10 winds up the material with a predetermined space being always maintained between itself and the mill roll 1 along with increasing of the wind-up diameter of the mill roll 1, by means of a retainer roll position adjusting device 21 and a retainer roll position setting dial 22.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a winding device for winding up a strip of plastic film, paper, etc. into a roll.

[Conventional technology]

(rl) Generally, when winding up a strip of plastic foil or the like into seven rolls, the following problems occur.

(a) Misalignment during winding (uneven cuts at both ends of the film...also known as a bamboo shoot shape) (b) Occurrence of unevenness (c) Occurrence of vertical and horizontal wrinkles (d) ) Scratches on the surface of the film, etc. 1-) Occurrence of tension unevenness In order to solve the above problem, it is important to reduce the thickness unevenness in the flow direction and width direction of the strip, but there is a limit to reducing this below a certain level. There is.

(2) The winding method shown in FIG. 5 is commonly used.

In Fig. 5, 01 is a mill roll, and the plastic film is 0°.
(hereinafter referred to as a strip) is wound up into a roll. It is usually wound up to an outer diameter of 1000 to 1200φ. At the center is a winding core, which is generally made of iron, but when winding lightweight items, paper or the like is used.

02 is a presser roll that holds the strip at a preset pressure in order to prevent the strip from slipping, wrinkles, unevenness, etc. when it is completely wound around the core, and at the same time to adjust the amount of air caught between the films. It works by reducing the pressing pressure as the mill roll becomes thicker.

The material is often rubber-wrapped rolls. As the strip becomes thicker, the main roll moves so that it can always be held at a given position from the outside.

03 is a guide roll, and a roll with a plated surface is often used as a guide roll when winding a strip.

04 is a roll position adjustment device, which controls the position of the presser roll 02 to adjust the pressure of the presser roll 02, and uses an electro-pneumatic converter etc. to adjust the pressure of the air cylinder 06 to a specified pressure from the outside. Freely control input and output pressure and change position.

05 is a suppression setting dial, which is a pressure setting dial when winding a strip onto a 1-mil roll 01, and input is given from an external source.

An air cylinder 06 is used to control the pressing force of the presser roll 02, and is operated in response to a signal transmitted from the roll position adjustment device 04.

07 is a band-like material such as plastic foil, which is wound up into a roll.

Mill roll 01
When winding the strip, it is wound with a preset tension and at the same time, the presser roll 02 is pressed against the surface of the strip 070 with a pressure given in advance by the roll position adjustment device 04 and the pressure setting dial 05. The pressing force is adjusted by changing the position of the presser roll 02.

[Problem that the invention seeks to solve]

(1) The following problems often occur in the above-mentioned method of winding using a presser roll: (a) Although winding is possible with very weak pressure, the pressure roll Due to the weight and the hardness of the rubber material on the surface of the presser roll, it is difficult to wind it up with a weak pressing force. In particular, as the width of the strip increases, the weight of the roll increases, making it difficult to adjust the winding with a weak pressing force.

(6) If the pressing pressure of the presser roll is increased and the belt is rolled, the belt will shrink while it is left for a long time.
The film cannot be used as a product due to wrinkles (wrinkles), adhesion of the films to each other (called blocking), or formation of lumps.

1+l When winding a strip into a roll, it is very easy to roll it tightly, but it is generally necessary to roll it weakly because problems such as those described in item 61 above occur.

In this case, a large amount of air enters between the strips, causing the strips to slip. In addition, in order to create a loose winding, the surface of the presser roll is processed into a spiral shape, a grooved roll is used, or a cloth-like material is wrapped around the outer circumference of the presser roll, but this increases the cost. Or, cloth-like dust may get into the belt-like material, causing dirt.

(2) Even if the surface of the strip is pressed with a soft rubber material, etc., there will be a mismatch between the advancing speed of the strip and the roll surface speed, and the surface of the strip will be scratched, which may result in a defective product.

(3) After winding up the stretched film, if the mill roll is left in a constant temperature room and the aging treatment 1 is not performed, the strip will shrink.

Therefore, it is necessary to perform a relaxing operation for the strip material called aging treatment 1 in a constant temperature room for 2 to 3 days.

[Means for solving problems]

A presser roll in contact with the strip has porous air outlets on its outer periphery.

A pressure-adjustable air blowing device is provided inside the roll.

When winding up the strip, the strip is forcibly pressed against the mill roll by the air pressure flowing out from inside the presser roll through the air outlet.

The shrinkability of the strip is improved by increasing the temperature of the air being blown.

[Effect]

(1) When winding a strip of plastic foil into a roll, the occurrence of wrinkles, irregularities, scratches, etc. on the strip can be prevented by blowing pressurized air or high-temperature air onto the strip from the outside. Ru.

(2) Shrinkage of the strip is prevented by blowing hot air from the outside.

〔Example〕

1 to 4, 1 is a mill roll, 3 is a guide roll, and 7 is a strip of plastic foil or the like, and these members are the same as the corresponding members described in connection with FIG. 5.

10 is a presser roll with holes, and there are many air outlets 1 on the outer periphery.
0 cL, and rotates at the same speed without contacting the strip 7 wound on the mill roll 1, while a box-shaped chamber 11 is installed inside to blow air at a uniform speed in the width direction.

Both ends of the presser roll 100 are held by rotatable arms 31 and bearings 32.

The widthwise position of the air outlet 10α is always designed to be smaller than the width of the strip 7 to be wound up.

11 is a box-shaped chamber that uniformly distributes pressurized air sent in from the outside in the width direction. The box-shaped chamber 11 consists of an air inflow pipe 12, a rectifier plate 13, and the like.

Reference numeral 12 denotes an air inflow pipe, and an outflow hole 12α is provided at a position opposite to the blowing direction of the box-shaped chamber 11 through which pressurized air flows into the box-shaped chamber 11, so that the air pressure within the box-shaped chamber 11 is kept constant. There is.

Reference numeral 13 denotes a rectifying plate, which is a plate with holes for uniformly distributing the pressurized air flowing out from the air inlet pipe 12 in the width direction.

Reference numeral 14 denotes an outflow air pressure setting dial, which determines the pressure with which the strip 7 is pressed against the mill roll 1 when the strip 7 is wound around the mill roll 1.

Initial pressure setting, light pressure setting, taper setting (gradually increasing or decreasing the setting of pressurized air from initial pressure to light pressure), etc. are all performed using this dial 14.

Reference numeral 15 is an outflow air pressure adjustment valve, which is a control valve for setting the blowout pressure to the setting indicated by the outflow air pressure setting dial 14.

Reference numeral 16 denotes a pressurized air production device, which is a source of air to be blown onto the strip 7, and may be of a proa type as shown in this figure or of a power storage type.

Reference numeral 17 denotes a pressurized air velocity pipe, which supplies pressurized air from the generation source 16 to the box-shaped chamber 11 through a joint (not shown).

18 is an air accumulator for storing blown air.

19 is a heat exchanger, which is a device that warms the blown air, and the heat source can be electricity, steam, oil, etc.

Reference numeral 20 denotes an air cylinder, which is rotatable as shown by the arrow to follow the winding of the mill roll 1, and is designed to maintain a constant gap δ with the mill roll 1 at all times.

Next, the operation of this device will be explained.

■ When winding up a 7t roll of a strip, the winding may be misaligned,
In order to prevent wrinkles, unevenness, surface scratches, etc., pressurized air or high-temperature air is passed through the air outlet 108 from the inside of the porous presser roll 10 that is in contact with the strip 7 wound on the mill roll 1. Spray onto the strip 7.

■ The air pressure to be blown varies depending on the characteristics of the strip 7 to be wound, so the outflow air pressure setting dial 14 is set from the outside.
and outflow air pressure adjustment valve 15, etc.

■ Preferably, the blowing air width t1 is the width of the belt-like material 7 to be wound up.
The winding width L1 is designed to be narrower.

■ The perforated presser roll 10 is wound up as shown in Fig. 3, using the presser roll position adjustment device 21 and the presser roll position setting dial 22, according to the mill roll 10 winding thickness while always maintaining a constant gap δ with the mill roll 1. go.

〔Effect of the invention〕

When winding a strip, the pressurized air 2 flowing out from the inside of the presser roll with holes blows hot air onto the strip to prevent (1) winding misalignment (2) wrinkles (3) surface irregularities (4) surface Scratches (5) Deformation of the strip after winding due to soft winding (6)
By blowing hot air, it is possible to prevent shrinkage and produce high-quality products.

[Brief explanation of drawings]

Fig. 1 is a longitudinal sectional view of an embodiment of the winding device for a strip of film or the like according to the present invention, Fig. 2 is an enlarged view of a part of Fig. 1, Fig. 3 is a detailed view of the The figure is from arrow IV-■ in Figure 3.
The sectional view, FIG. 5, is a longitudinal sectional view of a conventional winding machine. DESCRIPTION OF SYMBOLS 1... Mill roll 3... Kite roll 7... Plastic etc. strip 10... Holder roll with hole 11... Box-shaped chamber 12... Air inflow pipe 13... Rectifying plate 14
... Outflow air pressure setting dial 15 ... Outflow air pressure adjustment pulp 16 ... Pressure air production device 17 ... Pressure air blast pipe 18 ... Air accumulator 19 ... Heat exchanger 20 ...・Air cylinder 21... Presser roll position adjustment device 22... Presser roll position setting dial Sub-agent Patent attorney Shige Okamoto 2 other persons

Claims (1)

[Claims] In a winding device that winds a strip of plastic foil or the like formed by an extrusion molding device onto a mill roll, a large number of air outlets are provided around a presser roll that is in contact with the strip, and pressure is applied to the inside of the presser roll. An air blowing device that blows adjustable pressure air or high-temperature air is provided, and when winding the strip, the strip is pressed against the mill roll by the air pressure flowing out from the air outlet of the presser roll. A winding device for a strip-like object such as a film.