JPS58212912A - Method and apparatus for feeding synthetic resin laminated sheet - Google Patents

Abstract

PURPOSE:To prevent bonded sheets from peeling or to keep the peeled area to a minimum by providing concave groove streaks on the circumferential surface of one roll at least of a pair of upper and lower rolls to pass synthetic resin laminated sheet between the pair of rolls. CONSTITUTION:When a laminated sheet 10 is passed between rolls 19, 20 and fed in the fixed direction, spiral groove streaks 21 are provided on the circumferential surface of one roll at least. It is preferable that the groove streak 21 is divided into two parts and a spiral concave groove streak is on each of the right and the left sides of the boundary in the center part. Even though sheet rise parts 10a occur by incomplete adhesion upon part of the laminated sheet, the rise parts 10a enter the groove streaks 21 of the rolls 19 and the rise parts caused by rolling is crushed completely or can be prevented to a minimum.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method and apparatus for feeding a composite laminated sheet.

Generally, one synthetic resin ridge layer sheet is obtained by pasting two synthetic resin sheets or films together by heat-pressing or adhesion using a company's adhesive. This may occur from time to time, and this incompletely bonded portion creates an air layer inside, causing a raised portion of the sheet, resulting in an inconvenient problem in sheet feeding.

In other words, the sheet feeding device of the take-up roll and the secondary processing feed-out roll Gin has a pair of upper and lower rolls in order to feed the sheet in a fixed direction by the rotation of the roll. Since the surface of the roll 1.2 of the feeding device is a flat surface.

When the laminated sheet 3 is passed between the e-rolls 1 and 2 and fed in a certain direction, the raised sheet portion 3a, which is the incompletely adhered portion, is crushed between the rolls, so that the air layer 4 inside the sheet is It moves continuously in the direction opposite to the traveling direction, and therefore, as the air layer 4 moves, the pressure causes the 7-tooth binding parts to be peeled off one after another.

As shown in Fig. Jg2, a long continuous peeling part 5 is formed in a substantially straight line.
occurs. A laminated sheet with such peeled portions 5 not only has a poor appearance but also suffers from a decrease in strength.

This will significantly reduce the product value.

The present invention was developed in view of the above points, and an object of the present invention is to provide a method for feeding and mounting a synthetic resin laminated sheet that can prevent or minimize the occurrence of peeling at the sheet attachment part. do.

That is, one of the present inventions is a method in which a 9-synthetic resin laminated sheet is passed between a pair of upper and lower rolls, and the laminated sheet is fed in a fixed direction by rotation of the rolls.

Sheet lifting due to incomplete adhesion of the laminated sheet on the circumferential surface of at least one of the pair of upper and lower rolls 9
A method for feeding a synthetic resin laminated sheet, characterized in that a concave groove is provided to avoid contact with the surface of the sheet, so that the raised portion of the sheet enters the concave groove at an arbitrary position on the roll surface. The gist is:

An eleventh aspect of the present invention has a predetermined roll spacing.

It consists of a pair of upper and lower rolls through which a synthetic resin laminated sheet is passed and the laminated sheet is conveyed in a fixed direction by the rotation of the rolls, and at least one of the rolls has a sheet floating due to incomplete adhesion in the laminated sheet. The object of the present invention is to provide a feeding device for a synthetic resin laminated sheet, which is characterized by having a recessed groove having a width and depth that allows a portion of the sheet to be inserted therein.

An embodiment of the present invention will be described below with reference to the drawings.

In FIGS. 3 to 6, t and oti synthetic resin laminated sheets are shown, and 1G is a synthetic resin sheet or a thin film pasted thereon, and usually has a two-layer structure.

It may be a laminate of three or more layers. Furthermore, the combination of laminates is arbitrary, such as sheets and films, sheets and sheets, and films and films, and the sheet or film may be a synthetic resin foam or a non-foamed material. It is possible to laminate any combination of foams, foams, non-foams, etc. The material resin of the laminated sheet 10 is not particularly limited, and examples include polyolefin resins such as polyethylene and polypropylene, and polystyrene resins such as polystyrene.

The means for pasting the synthetic resin sheets or films (hereinafter simply referred to as sheets) 11 and 12 is heat compression bonding.

Any method such as bonding with adhesive can be used. For example, M
Figure 3 shows a semi-molten sheet 11 melt-extruded from a T-die and a sheet 12 separately delivered from a roll 13.
and are pinched between pinch rolls 14 and 15 to make both seams) 11
．． 12 is crimped to obtain a laminated sheet 10. When attaching the sheets 11, 12 by heat-pressing, adhesive bonding, or any other method, incomplete adhesion may occur due to technical reasons. An air layer 16 is formed inside the incompletely adhered portion, resulting in a raised sheet portion Nl'a' (FIGS. 5 and 6).

In FIG. 3, 11 is a take-up roll for sending the laminated sheet) 10tl in the direction of arrow a, and the laminated sheet) 10 sent in the direction of arrow a by the take-up roll 11 is wound up by multiple rolls per day. It will be done. The take-up roll 11, which is an embodiment of the sheet feeding device of the present invention, consists of a pair of upper and lower rolls 19, 2◎, a roll 1, and a roll 1, which are an upper and lower pair of rolls 19, 2◎, and a roll 1 having a predetermined roll interval.
9.20 Laminated sea) 10 through roll 19.20
The structure is such that the laminated sheet 10 can be fed in a certain direction (direction a in FIG. 3) by the rotation of the sheet.

A spiral concave groove 21 is provided on the roll surface of at least one of the upper and lower rolls, for example, the upper roll 19 in this embodiment. It is also possible to form a continuous spiral groove from one end of the roll surface to the other end (that is, along the axial direction) as the groove 2, but with this configuration, the 811-layer foot 1 Since the feeding direction of the roller curves in the direction corresponding to the helical direction, in order to avoid this problem, r divides the spiral concave groove 21 into two as shown in Fig. It is preferable to provide spiral concave grooves 21 on the left and right sides, respectively.

In this case, the direction of the two spiral concave grooves 21 can be directed toward the ends (outside) of the roll, or conversely, can be directed toward the center (inside) of the roll. is i#i.

If possible, the former is preferable since there is a risk of wrinkles occurring in the laminated sheet 10. In the case of this embodiment, the former method is adopted, and as shown in FIG.
1 are formed in a direction toward the end (outer fill) of the roll 19, respectively.

The concave grooves 21 must have a moderate width and depth into which the sheet floating upper p portion 10m of the incomplete adhesion portion of the laminated sheet 10 can be inserted, and the width is usually 5 to 50 m.
The depth is approximately 1.5 times the thickness of the laminated sheet 10. Furthermore, the pitch l (FIG. 4) between the grooves 21 is between 20 and 50 blades.

Roll 19 of the take-up roll 17 configured as described above.
I passed all 10 of the laminated sheets in 20 minutes.

Sheet lifting, 0fR (IOa is roll 190 concave groove 2
5 and 6), contact with the roll 19 can be avoided and the floating portion 10a will not be crushed between the rollers 19 and 20. As a result, the laminated sheet) 1G is sent without any pressing force being applied to the internal air N16, so that the sheet-attached portion does not peel off.

Since the concave groove strip 21 is provided in a spiral shape, the floating upper part lo
g enters the two concave grooves at an arbitrary position on the circumferential surface of the roll 19. That is, regardless of the initial position at which the raised portion 10m contacts the circumferential surface of the roll 19, as the roll 19 rotates, it always corresponds to the grooved groove 21, and the grooved groove 2
Enter 1. Therefore, the raised portion 10m of the temporary sheet contacts the flat surface 19m of the roll I'9 for the first time, and is therefore crushed between the rolls 19 and 20, causing the air layer 16 to move in the opposite direction to the sheet traveling direction. , even if peeling occurs at the sheet attachment part, the movable air layer 16, that is, the floating air layer 9
Since the portion 10m instantly enters the concave groove 21, no further peeling occurs, and peeling can be kept to a minimum.

As another embodiment of the present invention, contrary to the above embodiment, a roll having a flat circumferential surface is installed on the upper side, and 1! is placed on the lower side. ! A roll having a surface provided with four Iw strips may be installed. Furthermore, grooves may be provided on both the upper and lower roll surfaces. The concave grooves are not limited to spiral grooves; for example, a plurality of concave grooves may be provided along the axial direction or not along the axial direction (diagonally) at predetermined intervals on the circumferential surface of the roll.

The present invention is not limited to the case where the laminated sheet is fed by a take-up roll, but for example, the present invention is not limited to the case where the laminated sheet is fed by a take-up roll.
Do the same thing when sending sheets.

In short, the present invention can be applied to any case where the laminated sheet is passed between a pair of upper and lower rolls and fed in a constant direction eC. Therefore, the present invention device it? Ha, pick up 9
In addition to the above-mentioned feed-out roll, it includes any roll that can pass a laminated sheet between a pair of upper and lower rolls and feed the sheet in a fixed direction by rotation of the rolls.

As explained above, the present invention provides a grooved groove on at least one roll surface of a pair of upper and lower rolls.

A synthetic resin laminated sheet is passed between the pair of rolls.

Since the sheet is fed in a fixed direction, even if a part of the 811-layer sheet has a raised part due to incomplete adhesion, the raised part will enter the concave groove of the roll, so it will not be raised by the roll. This has the effect of completely or maximally preventing the parts from being crushed, thereby reliably preventing the sheet-attached parts from peeling off, or at least minimizing the peeling.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view showing a conventional sheet feeding device. FIG. 2 is a plan view of a sheet showing the state of peeling portions that occur on the sheet when the sheet is fed by the apparatus shown in FIG. 1, and FIGS. 3 to 6 show embodiments of the present invention. FIG. 3 is a schematic diagram showing the sheet pasting process and sheet feeding process;
Fig. 4 is a longitudinal sectional view showing the case of sheet feeding by the device of the present invention, Fig. 5 is an enlarged view of section A in Fig. 4, and Fig. 6 is a longitudinal sectional view taken along the line W-Mm of Fig. 4. .1 G--------Synthetic resin laminated sheet)' 10
m----Sheet floating 9 parts 17-------Take-back roll 19.20----One roll 21----
--- Single concave groove strip

Claims (2)

[Claims] (1) In a method in which a synthetic resin L-sheet is passed between a pair of upper and lower rolls and the upper stacked J-sheet is fed in a fixed direction by the rotation of the rolls, the peripheral surface of at least one of the upper and lower pairs of rolls is used. A concave groove was provided to avoid contact with the upper part 9 of the sheet due to incomplete adhesion on the upper Ha M 1m sheet. A method for feeding a synthetic resin laminated sheet, characterized in that the raised and raised portions of the sheet enter the concave grooves VC at arbitrary positions on the roll surface. (2) Consisting of a pair of upper and lower rolls with a predetermined roll interval and between which two synthetic resin laminated sheets are passed and the laminated sheet is fed in a fixed direction by the rotation of the rolls, the above-mentioned A feeding device for a synthetic resin laminated sheet, characterized in that a concave groove is provided with a width and depth sufficient to accommodate a raised portion of the laminated sheet due to incomplete adhesion.