JPH06212520A - Production of crimped yarn and apparatus for producing the same - Google Patents

Abstract

PURPOSE:To impart crimps to continuous yarn without causing damage thereto by heat-treating the yarn while meandering and running the yarn among many columns running at a prescribed interval. CONSTITUTION:Chains 2 having attachments are run with sprockets in a heating box such as a hot-air heating box and continuous yarn 1 is advanced while being meandered among columns 3 provided in the attachments 4. Thereby, the yarn is heat-treated and discharged in a state of a heat-set crimp shape from the heating box.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crimped yarn production method and a production apparatus for producing a crimped yarn in which a continuous yarn is meandered and conveyed and heat-treated in that form.

[0002]

2. Description of the Related Art Conventionally, a method and apparatus for crimping a yarn is called a push-type crimping device, in which a pushing roller pushes the yarn into a winding chamber to give crimp, and then dry heat treatment. Alternatively, a method of heat treatment by moistening in a J box or the like is generally used for synthetic fibers or the like. In addition, as a method of vertically connecting a coil-shaped tube connected to a yarn supply roller and supplying the yarn to the conveyor while rotating the yarn and heat-treating it on the conveyor, as a method for treating the tow-shaped fibers, the relative rotation is performed. There is a method of mechanically crimping by sandwiching with a star roller. However, in these methods, since a considerable mechanical force is applied to the yarn to form the crimped shape, it is inevitable that the yarn is completely bent or damaged. In particular, in the case of a hollow fiber, there is a drawback in that the bending of the yarn leads to a loss of the function of the object itself.

[0003]

DISCLOSURE OF THE INVENTION The present invention has been made for the purpose of solving such problems.
That is, it is a method for efficiently crimping a yarn and a manufacturing apparatus thereof, without completely bending or damaging the yarn.

[0004]

In order to solve the above-mentioned problems, the present invention takes the following means. That is,
The present invention is a method for producing a crimped yarn, characterized in that the continuous yarn is made to meander between a large number of cylinders traveling at a constant interval and is run, and is heat-set by heat treatment, and
It is characterized by comprising a free roller, a heating box, and a yarn-conveying unit that is located in the heating box and has a chain fixed to an attachment, and a chain with an attachment that runs in opposition to convey the yarn meanderingly in the column. A crimped yarn manufacturing apparatus is adopted.

The present invention will be described in detail below. Figure 1
FIG. 2 is a vertical cross-sectional view of the crimped yarn manufacturing apparatus of the present invention, and FIG.
It is a detailed view of the main part. In FIG. 2, the continuous yarn 1 is conveyed while meandering between columns 3 provided on an attachment 4 of a chain 2 with an attachment.

In FIG. 1, a chain 2 with an attachment as shown in FIG. 2 is run in a heating box, for example, a hot air heating box 5 in the direction of an arrow by a sprocket 9 driven by a drive source (not shown). A cylinder 3 is fixed to the attachment 4, and one chain 2 with attachments is provided on each side. Here, the continuous yarn 1 is fed from the free roller 8, is moved forward as the column 3 travels while meandering between the columns, and is heat-set and heat-set by the hot air supplied from the hot air inlet 6. From the hot air heating box 5, crimps are applied and discharged.

The positions of the hot air inlet and the hot air outlet are not particularly specified as long as the hot air heating box is uniformly heated. Also, as for the heating method, a heater or the like is not particularly specified as long as it is a method other than hot air heating.

It is desirable that the clearance between the chains traveling relative to each other be variable by using a driving device such as a ball screw or an air cylinder. It is necessary to adjust the clearance according to the outer diameter of the yarn. If the clearance is too small, the traveling cylinders will hit each other, and the yarn will be damaged more than necessary. If the clearance is too large, the crimp applied to the yarn will be weakened and the effect will be reduced. Further, it is necessary to select the columnar shape, the chain mounting pitch, etc., according to the desired crimp shape of the yarn. The material of the chain and the cylinder is not particularly specified as long as it is heat-resistant and has corrosion resistance to the yarn.

[0009]

EFFECTS OF THE INVENTION The present invention has the remarkable effect that crimps can be efficiently applied without completely bending or damaging the yarn.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a crimped yarn manufacturing apparatus of the present invention.

FIG. 2 is a detailed view of a main part of FIG.

[Explanation of symbols]

 Chain with continuous thread attachment Cylindrical attachment Hot air heating box

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Claims (2)

[Claims] 1. A method for producing a crimped yarn, characterized in that a continuous yarn is made to run while meandering between a large number of cylinders running at regular intervals, and is heat set by heat treatment. 2. A free roller, a heating box, and a yarn transporting unit that is located in the heating box and in which a chain with an attachment, in which a cylinder is fixed to an attachment, travels in opposition to each other and transports the yarn meanderingly in the column. A crimped yarn manufacturing apparatus characterized by the above.