JPS62140959A - Method for winding up long-size object and wound object - Google Patents

Abstract

PURPOSE:To prevent deformation, etc. by using a core having an inside diameter of a uniform dimension and a tapered irregular outside diameter having a difference of 2mm in the outside perimeters between both end parts, bringing the core end part having smaller outside perimeter to the cutting starting side of a long-size object, and making the acute angle part of said cut long-size object 20-70 deg.. CONSTITUTION:Cores 2, 3 are irregular outside diameter cores with an inside diameter of 63mm, an outside perimeter of 220mm on one end while that of 224mm on the other end, and a length of 185cm, having a taper on the outside ranging over the whole length. A metal round bar 7 having an outside diameter of 62mm is put in the core. The core is used with its end part having the outside perimeter of 220mm brought to a cutting knife 5 side. The cutting knife 5 is moved in the direction of the arrow 6, perpendicular to the moving direction of a film 1 at a speed of 1.5m/sec, to cut the film 1. The form of the acute angle part of the film produced by cutting the film is made an angle of 20-70 deg.. Thereby, the film can be made easier to use without deformation, wrinkles, sag, etc. when a wound film is unwound.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method for continuously winding a produced elongate object around a winding core in the process of manufacturing a elongate object made of synthetic resin or the like. .

[Prior art]

In order to continuously wind up a long object, it is necessary to cut the long object and wind it around a new core when it is fully wound. The winding methods used for this purpose include a center winding method (shaft-driven winding) in which the winding core is directly rotated by a rotation drive device, and a center winding method in which the winding core is brought into contact with the surface of a rotating drum. A surface winding method (surface-driven winding) is used in which the winding core is rotated by frictional force. A new empty core is placed parallel to the full roll and above or below the moving long object, and the long object is cut by a cutting blade as close as possible to the new core. Start winding by wrapping the cut end of the object. The core used in this case is generally cylindrical, and the cylindrical core has uniform inner and outer diameter dimensions.

A common cutting method is to move a cutting blade along the length of the core in a direction perpendicular to the direction of movement of the long object from one side of the long object to the other.

The cutting line of a long object cut by such a cutting method is diagonal, and the cut end is an acute angle as shown in FIG. 1 (Conventional Example 1). When a long object with such a cut end is wound up using the above-mentioned winding core, when it is unrolled and used, the second
As shown in the figure, there is a problem in that long objects are deformed, warped, and cracked. As a method for preventing deformation, a method has been proposed (Conventional Example 2) in which a plurality of cutting blades are moved in opposite directions to form a cut end shape as shown in FIG. Although this product improves the deformation of long objects, it has the disadvantage that warps and walnuts remain partially along the longitudinal direction, and the cutting device is complicated and expensive.

In addition, a winding core with tapered inner and outer surfaces was manufactured by using a tapered core with different diameters at both ends and wrapping trapezoidal paper around the outer periphery of the core (Figure 4). There is a method to use (Conventional Example 3). This winding core has the disadvantage of extremely low strength. Furthermore, continuous production is difficult and expensive.

[Problem that the invention seeks to solve]

The present invention is a method for continuously winding a long object, which prevents deformation, warping, and walnuts when the wound long object is unwound.

[Means to solve the problem]

When a long object winding machine is fully wound, the long object is cut with a cutting blade that moves from one side of the long object to the other in a direction perpendicular to the direction of movement of the long object. In the continuous winding method of winding around a new empty winding core, the inner diameter is uniform, the outer circumference length difference between both ends is two or more fins, and the outer circumference is directed from the shortest end of the winding core to the other end. Use a winding core with different outer diameters that has a taper over 1/2 or more of the total length of the winding core, place it so that the end of the winding core with the shorter outer periphery is on the cutting start side of the long object, and cut. To provide a method for winding up a long object, which is characterized by cutting the long object produced by cutting the long object so that its acute angle part has an angle of 20 to 70 degrees, and winding it up.

〔Example〕

EXAMPLES The present invention will be explained below with reference to examples, but the present invention is not limited to what is shown in the examples.

Further, the drawings of the embodiments are for helping understanding of the embodiments, and the relative dimensions and angles of each part are not limited to those shown in the drawings.

Example 1 FIGS. 5 and 6 show a surface winding type winding device of the present invention installed in a flexible polyvinyl chloride film manufacturing apparatus. The film (1) has a thickness of 0.1 mm, a width of 180 mm, and is wound at a speed of 80 m/min. (The phrase is a core fully wound with film (1). (3) is a new empty core. The core (→, (
3) is a different outer diameter winding core with an inner diameter of 63 mm, an outer circumference length of 220 stitches at one end of the core, an outer circumference length of 224 mm at the other end, and a length of 185 m, with a taper on the outside across the entire length (No. 7 figure). A metal round rod (7) with an outer diameter of 62 mm is placed inside the winding core. The purpose of this round bar is to apply a load uniformly over the entire length of the winding core and accurately transmit the rotation of the rotating drum (→) located below to the winding core. Outer circumference length 22
Use it so that the 0- end is on. The cutting blade (5) is indicated by the arrow (
Cut the film (1) by moving in the direction of 6) at a speed of L5 m/sec in a direction perpendicular to the moving direction of the film (1),
After cutting, it stops, moves upward so as not to contact the film, moves in the opposite direction to the arrow (6), and returns to the position shown. The cut film has a shape as shown in FIG. A fully rolled film was unwound after one month of aging, and the shape of the film was examined. The result was that there were few deformations, wrinkles, and walnuts, and the film was in very good condition and was easy to use when used for post-processing.

The core used here was made by laminating seven pieces of paper tape with a width of 100m+ in a spiral around the outer circumference of a metal round bar for manufacturing cores with an outer diameter of 63m, and after bonding them together with adhesive, the outer surface was polished using a grinding machine. It is ground and tapered and has the same excellent strength as conventional products.

In addition, the moving speed of the cutting blade of the present invention does not need to be the same from the start of cutting to the end of cutting, and cutting is performed by changing the speed multiple times to prevent mistakes and wrinkles when winding the film around the core. can be done.

Incidentally, it is necessary that the shape of the acute-angled portion of the film formed by cutting the film be at an angle of 20 to 70 degrees. This angle is determined by the relationship between the moving speed of the film and the cutting blade.
If it is more than that, it is not preferable because the wrapping may cause mistakes and wrinkles.

Also, if you slow down the cutting blade to less than 20 degrees, the film at the acute angle will become longer, making this part unusable.
There is no loss and no gain. Further, the difference in the outer circumferential length of the winding core must be 2W or more, and is appropriately selected depending on the thickness of the film and the length of the acute angle portion.

Example 2 The inner diameter of the winding core is 63 mm, the outer circumference length of one end of the winding core is 220 mm, and the outer circumference length of 150 cm from the one end to the other end is 224 + W,
The same procedure as in Example 1 was carried out except that the outer side of the core was tapered and the core shown in FIG. 8 with an outer circumference of 224M from the 150 cm section to the 185 cWI section at the other end was used. As a result of examining the shape of the fully wound film after unwinding it after one month, it was found that the winding core was 15 mm compared to Example 1.
ocII! Although some walnuts were observed in the film in some areas, overall there was little deformation, fading, or walnuts, and the film was easy to use in post-processing.

Comparative Example 1 One end made by the method of Conventional Example 3 has an inner diameter of 63 m and an outer diameter of '70.
m, inner diameter of other end 60. , an outer diameter of 67 mm, a length of 185 mm, a core with a tapered outer surface was used, and a metal round bar with a similar taper was inserted into the core, but the same procedure as in Example 1 was carried out. did.

When a new empty winding core is placed on the surface of the rotating drum (4),
Since the thick opposite side of the metal round bar presses the core with a strong load, it was found that the film moving between the drum (4) and the core (3) was easily deformed and wrinkled.

After unwinding the fully rolled film after one month, it was discovered that some of the core had been crushed and deformed. The film was broken at the crushed part of the core.

Further, when the iron core is inserted into the winding core and a fully wound film is set in a post-processing machine, the iron core is difficult to insert and is difficult to use.

〔Effect of the invention〕

Therefore, since the present invention cuts with one cutting blade, the cutting device is not complicated, and since the inner diameter of the winding core is uniform, a rod with a uniform outer diameter can be used as the metal core to be inserted. Since it can be pressed smoothly and uneven force is not applied to the film, winding can be done accurately. Furthermore, since the outer circumferential lengths of the cores are different, when the wound film is unraveled, there is little deformation, wrinkles, or walnuts in the film, making it easy to use.

[Brief explanation of drawings]

Figure 1 shows the cut end of a long object in Conventional Example 1 and Example, and Figure 2 shows the deformation, twisting, and walnut of the long object. R1) Rigid Figure 5 is a cross-sectional view of the winding core of conventional example 3, Figure 5 is a side view of the winding machine of Example 1, Figure 6 is a plan view of Figure 5, Figure M, and Figure 8 are examples of implementation. An example winding core cross-sectional view is shown.

Claims (2)

[Claims] (1) When a long object winder is fully wound, the long object is removed by a cutting blade that moves from one side of the long object to the other in a direction perpendicular to the direction of movement of the long object. In a continuous winding method in which the core is cut and wound around a new empty core, the inner diameter is uniform, the difference in outer circumference length between both ends is 2 mm or more, and the end of the core with the shorter outer circumference is closer to the other end. 1/2 of the total length of the opposite winding core
Using a winding core with different outer diameters having tapers in the above sections, place the winding core so that the shorter end of the outer circumference of the winding core is on the cutting start side of the long object, and avoid the acute angle of the long object caused by cutting. 20 parts
A method for winding up a long object, characterized by cutting it at an angle of ~70 degrees and winding it up. (2) The inner diameter is uniform, the outer circumference length difference between both ends is 2 mm or more, and the direction from the shorter outer circumference end to the other end is 1 of the total core length.
Using a winding core with a different outer diameter that has a taper at a portion of /2 or more,
The cut end of the long object having an angle of 20 to 70 degrees formed by the cutting line of the long object and the long object side on the cutting start side is wound around the end of the winding core having the shorter outer circumference of the winding core. A long roll of material characterized by the fact that it is