JPS5936703B2 - Manufacturing method for cord with core wire - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improved method for producing a cored string that can simultaneously produce a large number of cored strings.

Conventionally, a cored string is known, which is made by embedding a metal wire in the center of a narrow tape-like body along its longitudinal direction.
Widely used as a simple packaging material.

This cored string is usually manufactured by extrusion coating a plastic material while feeding the cored wire into a crosshead die of an extruder, or by arranging a large number of cored wires in parallel and covering both sides with plastic sheets. It is manufactured using a method in which multiple core wires are obtained at the same time by laminating materials such as paper or paper together and then cutting between the core wires.

Compared to the above-mentioned former method of manufacturing using an extruder, the latter method of laminating makes it easier to produce a large number of sheets, and it is not easy to obtain products of uniform quality, but the sheet material on both sides can be made with different colors. Although this is a rational and efficient method, as it can be constructed with different materials, it is difficult to achieve complete bonding and integration due to the short bonding time, and it is difficult to bond and integrate. A major drawback was that it was not possible to remove the wrinkles that sometimes occur.

The present invention proposes a new and improved method for manufacturing a cored string that solves the difficulties in the above-mentioned bonding method. At least one core wire whose surface is coated with adhesive is sandwiched between the sheets, and the sheets are welded together by pressure-welding pinch rolls, and then these are crossed between a heating roll and a cooling roll under tension. In the method of the present invention, the core wire is sandwiched between two sheets between pressure-welding pinch rolls, and after they are pressure-welded and integrated, they are first rolled up while applying tension. Wrap it around the circumferential surface of a heating roll to ensure perfect adhesion, remove wrinkles, and then wrap it under tension around a cooling roll to cool and solidify it, making it flat and free from warping and bending. The purpose is to manufacture high-quality cored strings with high efficiency.

Hereinafter, the present invention will be explained in detail based on the accompanying drawings.

First, FIG. 1 diagrammatically illustrates the schematic configuration of an apparatus for carrying out the method of the present invention, and as is clear from the drawing, this apparatus is a device for applying adhesive to a core wire. A) Equipment for applying adhesive to sheets B) Equipment for arranging core wires in parallel and pasting sheets on both sides to form an integrated unit, then heating and cooling them C) Equipment for cutting the integrated sheet-like object , each of which has a take-up device D as its main component, but it goes without saying that a device E for feeding out the core wire is provided in the front stage of this device, and a device F for winding the product is provided in the rear stage. There it is.

To explain each of the above-mentioned devices A to D in detail, device A that applies adhesive to the core wire W includes a guide roll 1 that arranges the core wire W at regular intervals, an adhesive tank 2, a core wire presser guide 3, and a core wire presser guide 3 that applies adhesive to the core wire W. It consists of a heating/guide roll 4 that dries the adhesive and arranges it at regular intervals, and the guide rolls 1 and 4 have a plurality of ring-shaped grooves on their outer peripheral surfaces that guide the core wires W at regular intervals. is engraved.

The device B for applying adhesive to the sheet s consists of an adhesive tank 5, a transfer roll 6 placed in this tank, and guides T, 8, and FIG. 1 shows a case in which adhesive is applied only to the sheet s. However, if necessary, a device for applying adhesive to the inner surface of the other sheet s' can be provided.

In addition, when applying adhesive to both sheets S and s', the amount of adhesive that adheres is generally too large, and the adhesive oozes outward when they are pressed together, causing damage to the circumferential surface of the pinch roll, etc. It is usually desirable to apply adhesive only to one side of one of the sheets, as it tends to stick. Further, the adhesive used here preferably has a viscosity of generally 100 to 1000 centipoise in order to prevent the adhesive from oozing out. Next, the core wire W and the sheet S,
The device C for bonding and integrating s' includes l pairs of pressure welding pinch rolls αy) and two heating rolls 10, 11 and 2.
Consists of book cooling rolls 12, 13, pinch rolls 9,
y is a material in which a core wire W and two sheets S and s' are bonded together by pressure, and the roll surfaces of these are in contact with each other and rotate at the same speed, and are heated appropriately by a heater installed inside. These rolls are heated and, as shown in FIG. 2, ring-shaped grooves 9a, 9a' for guiding the core wire W are carved on one or both of the peripheral surfaces thereof.

The heating rolls 10 and 11 have the pinch roll 9 inside them.
. However,
As will be described later, the heating roll and cooling roll make important movements in the present invention, and these rolls move the sheets S and s', which are bonded and integrated, along an S-shaped or Z-shaped path. It is arranged so that it runs in a sash-hung state. As shown in FIG. 3, the device D includes cutting knives 14 installed at equal intervals, a socket roll 15 having relief grooves at the cutting positions of the knives, and pinch rolls 16, 16 provided behind the receiving roll 15. This pinch roll has almost the same structure as the pinch rolls 9 and q described above, except that it does not have a heating means. The sheets S and s' used in the present invention include plastic sheets such as polyvinyl chloride, polyethylene, and polyethylene-polyester laminates, ordinary paper, synthetic paper, or aluminum foil lined with hot melt. , tin foil, etc. can be used, while core wire W
As the material, metal wires made of iron, aluminum, stainless steel, etc., or natural or artificially spun yarns are used.

Next, a method for manufacturing a cored string according to the present invention using the above-mentioned apparatus will be explained. First, the cored wire W wound around a plurality of bobbins is guided to an adhesive tank 2 via a guide roll 1, After being soaked in the adhesive, the adhesive is dried while passing through the rolls 4, and then fed into the pinch rolls 9q.

On the other hand, the sheet s is pulled out from the original fabric roll, passed through the guide roll T, is coated with an appropriate amount of adhesive while in contact with the transfer roll 6, passes through the guide roll 8, runs along the lower pinch roll 9, and forms the core wire W. It is retracted to the lower side and the sheet s'
is pulled out from the original fabric roll, passes through the guide roll 8', and is rolled into the upper side of the core wire W along the upper pinch roll y.

In this case, the sheets S and s' do not need to be of the same quality or the same color. The sheets S and s' with the core wire W sandwiched therebetween are pressed together between the pinch rolls 9 and g to form a sheet-like body S. This sheet-like body is then transferred to the heating roll 10 , 11. Furthermore, cooling rolls 12, 13
It runs along an S-shaped or Z-shaped route.

In addition, in the present invention, one sheet S is strongly heated while the sheet S passes through the circumferential surface of the heating roll 10 in contact with the other sheet S, but in the next step, the other sheet S is heated strongly. The sheet s' is strongly heated while it passes through the heating rolls 10 and 11, which causes warping and bending while the sheet S passes through the heating rolls 10 and 11. Then, while passing through the cooling rolls 12 and 13, the sheets s and s' are uniformly cooled and the adhesive is cooled and solidified.

In addition, in the present invention, the sheet-like body S, which has been pressure-welded and integrated with the pinch rolls 9 and q, is placed under tension on the heating rolls 10 and 11.
Since the sheet S passes through contact with the circumferential surfaces of the cooling rolls 12 and 13, there is no possibility that the sheet S will be wrinkled during this time. In addition, although FIG. 1 shows an example in which two heating rolls and two cooling rolls are arranged, this is one roll each, and the sheet-like body S runs across these rolls. In this case as well, the sheet-like body is placed under tension, so that the resulting cored string can be prevented from warping, bending, wrinkles, etc. However, as shown in FIG. It goes without saying that it is more effective to pass the film in contact between two heating rolls and two cooling rolls.

The sheet S that has passed through the heating rolls 10, 11 and the cooling rolls 12, 13 as described above is then passed through the roll 15.
At this time, the cored string T is cut with a knife 14 and cut into individual core wires, and then passes through a pinch roll 16,
16 and are pulled out at the same speed and wound onto separate winding bobbins 17, respectively.

As explained above, in the method of the present invention, a core wire whose surface is coated with an adhesive is sandwiched between two sheets having an adhesive coated on at least one of the inner surfaces, and the core wire is sandwiched between two sheets with pressure welding pinch rolls. The core wire cord obtained by this method is one in which the core wires are integrated by pressure welding and then cross-crossed between a heating roll and a cooling roll to apply tension.
The above-mentioned heating roll and cooling roll run in a cross-tension state under tension, which effectively removes uneven heating and strain caused by bending stress, and prevents the generation of wrinkles, resulting in a flat, warped and curved surface. Not considered to be of good quality.

Therefore, the industrial utility of the present invention is great.

[Brief explanation of drawings]

FIG. 1 is a diagram showing a schematic configuration of an apparatus for carrying out the method of the present invention, FIG. 2 is a schematic diagram showing the configuration of a pressure welding pinch roll in this apparatus, and FIG. 3 is a cutting knife for sheet-like objects in this apparatus. FIG. 3 is a schematic diagram showing the configuration of a receiving roll. 1... Guide roll, 2... Adhesive tank, 3... Core wire presser guide, 4... Heating/guide roll, 5...・Adhesive tank, 6...
...Transfer roll, 7, 8...Guide roll, 9
...Pinch roll for pressure welding, 10, 11...
...Heating roll, 12,13...Cooling roll,
14... Cutting knife, 15... Receiving roll, 16... ...Pinch roll, 17...
Winding bobbin, S, s'...sheet, S sheet-like body, W...core wire, T...string with core wire.

Claims (1)

[Claims] 1 Two sheets coated with an adhesive on at least one of their inner surfaces are pressed together between pressure welding pinch rolls with at least one core wire whose surface is coated with an adhesive sandwiched between them, and then A method for producing a cored string, which comprises passing these wires between heating rolls and cooling rolls under tension, and then winding them up.