JPH0860480A - Synthetic fiber yarn heating device - Google Patents

Abstract

(57) [Summary] [Object] The present invention, by devising the shape of the heating groove, makes the heating temperature distribution uniform over the entire traveling path of the yarn, improves the heating efficiency of the yarn heating device, and causes stains and the like The purpose is to effectively prevent the deterioration of the physical properties of the yarn. [Structure] Guide members 14A and 14B are provided in heating grooves 12A and 12B formed in a heating body 11, and guide members 14A and 14B guide synthetic fiber yarns 1A and 1B so that they can run in a predetermined direction and heat In the device for heating the yarns 1A, 1B in the heating grooves 12A, 12B by the body 11, the heating grooves 12A,
The guide member 12B has a slit-shaped thread hooking groove portion 21 capable of introducing the yarns 1A and 1B in a direction substantially orthogonal to the predetermined direction, and a groove width D larger than the groove width d of the thread hooking groove portion 21. 14
It has a widening groove portion 22 for accommodating A and 14B. Heating groove
12A and 12B are preferably linear grooves, and the guide members 14A and 14B preferably guide the yarn in the widening groove portion 22 from both sides in the groove width direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat treatment device for synthetic fiber yarns, for example, a heat treatment device for synthetic fiber yarns provided in a draw false twisting machine or the like for heating the yarns in a predetermined traveling section.

[0002]

2. Description of the Related Art Conventionally, in a false twisting machine such as a false twisting machine or a drawing false twisting machine, an intentional processing speed has been increased, and in recent years, particularly, in a twisting section on the upstream side of a twisting machine. By using a non-contact heating device for the yarn heating device to be installed,
A dramatic increase in processing speed is being achieved.

As a heating device for this kind of synthetic fiber yarn, for example, there is one in which a heating block (heating passage) is formed in a heater block in which a heater is embedded and a plurality of yarn guides are mounted in the heating groove. The yarn guide is attached to the heater block from a direction orthogonal to the heating groove, and a substantially U-shaped guide groove having a narrower groove width is formed in the heating groove. It is heated while being guided so as not to contact the inner wall surface of the high temperature heater block. Further, in order to prevent so-called ballooning, a so-called bow-shaped running path in which a plurality of yarn guides are arranged and shaped so that the groove depth of the guide groove becomes deeper toward the entrance of the heating passage, is gently curved. Are formed, or the running path is made into a zigzag shape.

[0004]

However, in the above-mentioned conventional heating apparatus for synthetic fiber yarns, when the yarn running path is formed in an arch shape, the running path of the yarn is in the heating running direction of the heating groove. Since the central portion and the both end portions are located at different positions in the groove depth direction, as shown in FIG. 4, the heating temperature gradient is large in the shallow groove depth region of the heating groove, so that the heating efficiency decreases. Was there. Further, when the yarn causes so-called yarn wobbling with the rotation of the yarn during false twisting, a large heating temperature change (in the running direction central portion of the heating groove where the yarn travels at a position with a shallow groove depth) ( (Corresponding to ΔT1 in FIG. 4) was caused, which adversely affected the physical properties of the yarn such as highly heat-sensitive dyed spots.
Further, since the bow-shaped traveling path is formed by a large number of thread guides, there are many kinds of thread guides and the mounting structure thereof is complicated.

On the other hand, when the running path of the yarn is zigzag-shaped, it is difficult to hook the yarn on the yarn heating device at the initial stage, and the yarn is rotated along with the rotation of the yarn during false twisting. A so-called winding phenomenon is likely to occur with respect to the guide, and the yarn after the yarn is hooked may fall off. Moreover, in this case, since the running resistance of the yarn becomes large, it is extremely difficult to prevent the yarn breakage and the generation of fluff.

The present invention has been made in view of such conventional problems, and in particular, the heating efficiency of the yarn heating device is improved by making the temperature distribution in the heating groove uniform over the entire yarn traveling path. The first object of the present invention is to prevent the deterioration of yarn physical properties such as dye spots and the like, and to realize a yarn guide system capable of effectively preventing the displacement of the running yarn in the depth direction of the heating groove. A second object is to further homogenize the heating temperature by straightening the yarn traveling path.

[0007]

To achieve the above object, the invention according to claim 1 provides a guide member in a heating groove formed in a heating body, and the synthetic fiber yarn is provided in the heating groove by the guide member. In a heat treatment device for synthetic fiber yarns, the heating grooves heat the yarns in the heating grooves by the heating element, and the heating grooves make the yarns substantially orthogonal to the predetermined direction. It is characterized in that it has a slit-shaped thread hooking groove portion which can be introduced in a direction, and a widening groove portion which has a groove width larger than the groove width of the thread hooking groove portion and accommodates the guide member, and is preferable. According to the invention of claim 2, the heating groove is a linear groove, and the guide member guides the yarns from both sides in the groove width direction of the heating groove within the widening groove portion of the heating groove. Characterized by being a shaped guide member Is shall.

[0008]

In the invention according to claim 1, the heating groove formed in the heating element has a widening groove portion for accommodating the guide member and a slit-shaped thread hooking groove portion into which the yarn can be introduced. The heating temperature gradient becomes gentle in the entire groove depth direction in the widening groove portion where the yarn traveling path is formed, and the yarn heating temperature by the heating body is made uniform.

According to the second aspect of the present invention, the widening groove portion is formed as a straight groove, and a plurality of guide members housed in the groove guide the yarn from both sides of the heating groove in the groove width direction. Therefore, there is no guide surface that is constantly urged against the traveling yarn, such as the bottom of the guide groove in the bow-shaped traveling route or the side wall of the yarn guide in the zigzag traveling route, so that the traveling yarn is rotated during false twisting. The yarn is less likely to shake, and the heating temperature is made more uniform.

[0010]

Embodiments of the present invention will be described below in detail with reference to the drawings. 1 and 2 are views showing an embodiment of a heating device for a synthetic fiber yarn according to the present invention, FIG. 1 is a sectional view of a main part thereof, and FIG. 2 is a perspective view of a heating body thereof. The heating device of the present embodiment is provided on the upstream side of the twisting device of a draw false twisting machine (not shown), runs in a yarn path of the draw false twisting machine, and twists the synthetic fiber yarn in a predetermined running section ( It is designed to heat in the twisting section).

First, the structure thereof will be described. In FIG. 1, 11 is a heater block as a heating body, and the heater block 11 is a yarn 1A for two spindles which travels (moves) on the yarn path in a predetermined direction. 1B (synthetic fiber thread), each of which is formed to surround (at least 1)
It has heating grooves 12A, 12B (of a book). The heater block 11 is a main body made of a steel material having good corrosion resistance (for example, stainless steel, aluminum brass, aluminum bronze) embedded with a heater (not shown) having a predetermined electric resistance. It is designed to generate heat when electricity is applied from the circuit.

The two heating grooves 12A and 12B are slit-shaped thread hooking groove portions 21 into which the yarns 1A and 1B can be introduced in a direction substantially orthogonal to the predetermined direction, and a groove of the thread hooking groove portion 21, respectively. Widened groove portion having a substantially circular cross section having a groove width D larger than the width d
22 and the widening groove portion 22 of each heating groove 12A or 12B.
Inside, multiple guide members made of ceramics, etc.
14A or 14B is stored at a predetermined interval in the yarn traveling direction. The heating grooves 12A and 12B are two linear grooves whose axes are parallel to each other, and the guide members 14A and 14B are heating grooves.
Heat the thread 1A or 1B in the widening groove 22 of 12A, 12B.
The guide groove rows are formed by guiding the guide grooves 12g from both sides of the groove widths 12A and 12B and linearly arranging the guide groove portions 14g. That is, the plurality of guide members 14A and 14B are a plurality of guide members having the same shape.

Although not shown in detail, the guide member 14
A and 14B are embedded in, for example, slit-shaped grooves or recesses formed in parallel with the heater block 11 at predetermined intervals, and are attachable to and detachable from the heater block 11. further,
The heater block 11 is surrounded by a heat insulating material (for example, calcium silicate, calcium carbonate, magnesium carbonate, etc.) and a cover, which are not shown, and these two yarns 1A, 1B traveling in the heating grooves 12A, 12B as a whole.
Is heated under predetermined conditions without contacting the heater block 11.

Next, the operation will be described. In this embodiment, the heating grooves 12A and 12B formed in the heater block 11 are formed.
Has a wide groove portion 22 for accommodating the guide members 14A, 14B and a slit-shaped thread hooking groove portion 21 into which the yarns 1A, 1B can be introduced. Alternatively, as compared with the heating groove having a U-shaped cross section, the heating temperature gradient becomes very gentle in the widened groove portion 22 in which the yarn running path is formed in the entire groove depth direction. Therefore,
Even if the running positions of the yarns 1A and 1B are changed to some extent in the groove depth direction of the heating grooves 12A and 12B, the yarn heating temperature by the heater block 11 does not change so much, and the yarn heating temperature is within the heating device. Will be made uniform over the entire traveling path. As a result, the heating efficiency of the heating device is improved, dyeing stains and the like with high heat sensitivity are effectively prevented, and it becomes possible to heat (heat-treat) a yarn having stable yarn physical properties.

Further, the widening groove portion 22 is formed as a linear groove, and the plurality of guide members 14 housed in the widening groove portion 22 are provided.
Since A and 14B guide the yarns 1A and 1B only from both sides of the heating grooves 12A and 12B in the groove width direction, for the traveling yarns 1A and 1B heated by the heater block 11,
As a result, there is no guide surface that is always urged, such as the bottom of the guide groove in the conventional bow-shaped running path or the yarn guide side wall in the zigzag running path. Therefore, the heating grooves 12A, 12B
Despite being only guided from both sides in the groove width direction of
Since the yarn swaying due to the rotation of the running yarns 1A and 1B during false twisting is less likely to occur, and the running route of the yarn is straight, the yarn breakage and the fluff are more likely to occur than when the zigzag type running route is adopted. Is less likely to occur. Moreover, since the cross-sectional shape of the widening groove portion 22 is substantially circular, the heating temperature can be made extremely excellent and uniform.

Further, in this embodiment, it is only necessary to attach the guide members 14A and 14B having the same shape to the heater block 11 under the same conditions, and the work of attaching the guide members 14A and 14B can be facilitated. In the present embodiment, the heating grooves 12A, 12
B has a circular cross section, but the cross-sectional shape is not limited as long as it has a widened portion that widens the groove width with respect to the thread hooking groove portion. For example, as shown in FIG. It is also possible to form the groove width D on the side as the heating grooves 32A and 32B having a rectangular cross section, which has the widened groove portion 42 that is wider than the groove width d of the thread hooking groove portion 41.

[0017]

According to the invention of claim 1, a heating groove having a widening groove portion for accommodating the guide member and a slit-shaped thread hooking groove portion capable of introducing a yarn into the widening groove portion is provided in the heating element. Since it is formed, the heating temperature gradient in the widened groove portion where the yarn traveling path is formed can be made gentle in the entire groove depth direction, and the yarn heating temperature by the heating body is made uniform in the entire traveling path. be able to. As a result, even if the running position of the yarn changes slightly in the groove depth direction, it is possible to prevent the heating temperature from changing so much that the heating efficiency is improved and the deterioration of the physical properties of the yarn such as dye spots is effective. Can be prevented.

According to the second aspect of the invention, the widening groove portion is formed as a straight groove, and the yarn is guided from both sides of the heating groove in the groove width direction by a plurality of guide members housed in the groove. Since the running path of the yarn is linear, the running yarn heated by the heating element can be prevented from being constantly urged by a part of the guide member. It is possible to prevent the yarn from shaking due to the rotation of the traveling yarn inside. As a result, the heating temperature can be made more uniform, and high-quality yarn physical properties can be obtained. Moreover, since it is only necessary to attach the guide member having the same shape to the heating element under the same conditions, the work of attaching the guide member can be facilitated.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part showing an embodiment of a heating device for synthetic fiber yarns according to the present invention.

FIG. 2 is a perspective view showing a schematic shape of a heating body according to an embodiment.

FIG. 3 is a perspective view of a heating body similar to FIG. 2, showing another embodiment of the heating groove.

FIG. 4 is an explanatory diagram of a problem in the conventional yarn heating device.

[Explanation of symbols]

 1A, 1B Yarn (Synthetic fiber yarn) 11 Heater block (Heating body) 12A, 12B Heating groove 14A, 14B Guide member 14g Guide groove part 21 Threading groove part 22 Widening groove part

Claims (2)

[Claims] 1. A guide member is provided in a heating groove formed in a heating body, the synthetic fiber yarn is guided in the heating groove so that the synthetic fiber yarn can travel in a predetermined direction, and the heating groove is provided by the heating body. In a heat treatment device for a synthetic fiber yarn, which heats a yarn inside, the heating groove is a slit-shaped yarn hooking groove portion capable of introducing the yarn yarn in a direction substantially orthogonal to the predetermined direction, and a yarn hooking groove portion. And a widening groove portion having a groove width larger than the groove width for accommodating the guide member, and a heating device for a synthetic fiber yarn. 2. The heating groove is a linear groove, and the guide member is a plurality of guide members of the same shape that guide the yarn from both sides in the groove width direction of the heating groove within the widening groove portion of the heating groove. The heating device for a synthetic fiber yarn according to claim 1.