JP2567213B2 - Method for multi-spinning of thermoplastic synthetic polymers - Google Patents

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a method for melt spinning a thermoplastic synthetic polymer such as polyester.

[0002]

2. Description of the Related Art In a spinning machine for industrially performing high-speed spinning at a speed of 6000 m / min or more, as shown in FIG. 7, a plurality of spinnerets 2'a, 2'b, 2'a, 2'b, are arranged parallel to the longitudinal direction X of the spinning machine. 2'c,
2'd are arranged. On the other hand, in order to facilitate the doffing of the package 7 when the package is fully loaded, in the present spinning apparatus, the axis of the winding mechanism of the package 7 is arranged vertically and horizontally in the longitudinal direction of the machine base to form one winding shaft. Multiple spinners 2 '
yarn 6'spun from a, 2'b, 2'c, 2'd
The method of simultaneously winding a, 6'b, 6'c and 6'd is adopted. Therefore, as shown in FIG. 7, a yarn running in a vertical plane parallel to the longitudinal direction of the machine stand from the spinneret 2 through the heating cylinder 3'to the cold air pressure chamber 24 to the cold air blowing portion 4 '. While 6'a, 6'b, 6'c and 6'd pass through the yarn guide and reach the oiling nozzle 5, they are moved into a vertical plane perpendicular to the longitudinal direction of the machine base. Therefore, the yarn path length of the yarn 6'between the spinneret 2 and the package 7 depends on the spinnerets 2'a, 2'b, 2'c, 2'd.
Each yarn 6 spun from the yarn differs from end to end.

[0003]

[Problems to be Solved by the Invention] Winding speed is 6000 m / mi
In ultra-high speed spinning of n or more, the air resistance of the yarn becomes very large. As a result, when the yarn path length differs from end to end as in the conventionally known spinning device shown in FIG. 7, the yarn tension changes from end to end. If the thread tension varies greatly from end to end,
There is a problem that the formed packages have different shapes and the obtained yarns have different physical properties.

Various attempts have been proposed to solve the above problems. For example, it has been proposed to provide a guide and a roll between the spinneret and the package to adjust the yarn tension for each end to be the same. However, the winding speed is 6,000 m /
If the roll is used in the case of min or more, the turbulence of the wind due to the surface of the roll has a great influence, and the yarn may dance on the roll,
The single yarn in the yarn is easily wound around the roll, and it is impossible to achieve stable spinning.

When a cross wind is used as the cold wind, the deviation of the yarn from the vertical axis becomes large, which may affect the dyeability of the product. Therefore, although it may be possible to take measures to cool it with a cylindrical cold air by a cooling cylinder, since it is wound at an ultra high speed of 6000 m / min, a vortex is generated inside the spinning cylinder due to the accompanying flow, and the yarn is also shaken. It causes deterioration of thread quality.

It is an object of the present invention to provide a multi-spindle spinning method in which the above-mentioned drawbacks of the conventionally known multi-spindle spinning method are eliminated and a package of uniform quality is obtained for each spindle.

[0007]

In order to achieve the above object, according to the present invention, a package winding shaft, the axis of which is substantially horizontal, extends vertically from the machine base along the longitudinal direction of the machine base. A plurality of packages are arranged on each of the package take-up shafts, and a plurality of packages are wound side by side along the axial direction of the take-up shaft, and the thermoplastic synthetic polymer is annealed from the spinneret to an annealing zone. A multi-spindle spinning method in which the yarn is wound into a package through a cooling zone, and features a yarn winding speed of 6000 m / min or more, and the yarn is wound into multiple packages on each winding shaft. The spinnerets are arranged along a line that is orthogonal to the longitudinal direction of the machine base and parallel to the axis of the winding shaft, and the lower ends are open around the yarns discharged from each spinneret. Enclose with a spinning tube and cool enough to match the associated flow rate. A cooling unit that supplies wind is provided, and the yarns from the corresponding spinners to the multiple packages of each winding shaft run only in one plane that includes the axis of the spinning shaft and the winding shaft. Is to let.

[0008]

By running a plurality of yarns in the same plane in this way, the length of the yarn path between the plurality of yarns becomes the same, and the yarn tension between the ends can be kept substantially the same. Further, a uniform flow free from vortices can be obtained by using cylindrical cold air and supplying an amount commensurate with the associated flow.

[0009]

The present invention will be described in detail below with reference to the accompanying drawings.
As shown in FIG. 1, in the multi-spindle spinning apparatus, a plurality of spinning units A, B, ... Are arranged in the longitudinal direction of the machine base. The number of spinning units A, B, ... Is determined arbitrarily, and normally 4 units, 8 units, 12 units are used. A winder 8 having an axis extending vertically and horizontally to the longitudinal direction of the machine base is provided below one spinning unit. In the illustrated example, four packages 7 are wound side by side in the axial direction. There is. The number of spinnerets 2a, 2b, 2 corresponding to the package 7
c and 2d are provided on the lower surface of the spin head 1 in a plane that extends substantially vertically upward including the axis of the winder 8, more specifically, the axis of the winding drum of the winder 8. The yarn 6 spun from each of the spinnerets 2a, 2b, 2c, 2d passes through the heating cylinder 3, the cold air cylinder 4, the oiling nozzle 5, the yarn guide 18 provided below the spin head 1, and the package 7
Reach The yarn 6 may be passed through an interlacer 25 arranged between two oiling nozzles 5 (see FIG. 6). The oiling nozzle 5 and the interlacer 25 are mounted on the pedestal 15.

The heating cylinder 3 and the cold air cylinder 4 are integrally formed and are suspended by a heating / cold air cylinder attaching / detaching device 10 on a traveling rail 11 provided on the side surface of the spin head 1. Cold air is supplied to the cold air tube 4 from a cold air duct 16 extending on the lower surface of the frame 15 in the longitudinal direction of the machine base through a cold air flexible duct 17. As shown in FIG. 6, the cold air in the cold air tube 4 is supplied to the yarn 4 running through the perforated plate 41. This cold air tube 4 is constructed such that the air passage resistance of the cold air blowing surface of the cylindrical cooling tube is substantially uniform in the circumferential direction and gradually decreases in the yarn running direction, and the amount of cooling is commensurate with the running yarn accompanying flow. Using a wake-compensation type cooling tube capable of supplying air (as the construction of the cold air tube alone, by the same applicant as the present invention, "Cooling tube for melt-spinning synthetic fiber" on January 22, 1985. It is the same as that disclosed in the specification of Japanese Patent Application No. 60-8483 filed under the name.) For example, as shown in FIG. 6 which generally shows the method of melt spinning, this cooling cylinder has a perforated plate 41 in which the arrangement intervals of the holes 42 are fitted downward, and the straightening cylinder 43 is connected from the holes 42. Cold wind blew downward 44
Cools the thread 6.

In FIG. 1, a heating cylinder 3 and a cooling cylinder 4 have spinnerets 2a, 2
The spinning unit A is shown immediately below b, 2c and 2d and is shown in operation. Next, the heating cylinder 3 and the cooling cylinder 4 are connected to the winder 4.
The state of being removed from the plane including the axis line and the spinnerets 2a, 2b, 2c, 2d will be described. FIG. 2 is a front view of the multi-spindle spinning apparatus. In FIG. 2A, the spinning unit is in operation as in FIG. 1, and FIG. 2B shows the spinning unit out of the plane. As shown in FIGS. 1 and 2, the heating / cooling air tube attaching / detaching device 10 for suspending the heating cylinder 3 and the cooling cylinder 4 has a pair of traveling wheels 14 engaged with the traveling rails 11, and the traveling wheels 14 at the ends. U-shaped main frame 13
A cylinder 12 housed in the main frame 13, a piston 12a extending downward from the cylinder 12 through the main frame 13, and a piston 12a attached to the lower end of the piston 12a extending horizontally and fixed to a side portion of the heating cylinder 3. Support arm 23
Consists of. In order to bring the heating cylinder 3 and the cooling cylinder 4 shown in FIG.
12 'is supplied with air through a conduit (not shown) to push down the spindle 12a', and then the heating / cooling air attaching / detaching device 10
2 together with the heating cylinder 3 and the cooling cylinder 4 to the right side in FIG. 2, thereby pushing down the heating cylinder 3 and the cooling cylinder. Alternatively, the movement and the pressing may be performed at the same time. Thus, the space S where the spinneret 2 can be cleaned is provided below the spinneret 2. After the cleaning of the spinneret 2 is completed, the heating cylinder 3 and the cooling cylinder 4 can be returned to the above-mentioned plane by performing an operation in the reverse order of the above-mentioned procedure.

FIGS. 3 and 4 are side views of the spinning unit in the state of FIG. 2A and the spinning unit in the state of FIG. 2B, respectively. As can be seen from FIG. 4, a cleaning space S is provided between the spinneret 2 and the upper surface of the heating cylinder 3. Cleaning is performed by inserting a cleaning tool or hand from both sides of the machine base, that is, from both sides of the spinning head in FIG. In the illustrated example in which four spinning holes are provided for one spinning unit, the four spinning holes can be completely cleaned by cleaning from both sides of the spinning head.

FIG. 5 shows another embodiment of the heating / cooling air attaching / detaching device 10. Heating / cooling air attaching / detaching device 10a in the embodiment of FIG.
Comprises a pillar 19 provided on a pedestal 15 and an arm 21 having one end attached to a rotary reactor 20 provided above the pillar 19 and the other end pivotally attached to the heating cylinder 3 by a pin 22.
In FIG. 5, (A) shows a state in which the heating cylinder 3 is arranged below the spinneret 2, and by rotating the arm 21 clockwise from this state, the heating cylinder 3 and the cooling cylinder shown in (B) are shown. 4 can be arranged below the rotary actuator 20.

Performance comparison between the method of the present invention and the conventional method Under the same conditions for the method of the present invention (method using the apparatus shown in FIG. 1) and the conventional method (method using the apparatus shown in FIG. 7) Three kinds of polyester multifilaments were spun and the winding tensions were compared. The comparison results are shown in Table 1.

[0015]

[Table 1]

From Table 1, when spinning is performed by the method of the present invention, the spinning tension can be made almost constant regardless of the position of the spinneret under each condition. On the other hand, in the conventional method, there is a large difference in spinning tension at each spinneret, and under the conditions shown with crosses, the amount of oil scattered in the yarn guide is large and frequent yarn breakages make stable winding impossible. Met.

[0017]

By using the spinning method of the present invention, the spinning tension at each end can be adjusted to be substantially uniform even when multi-spindle spinning is performed, and the spinning tension itself is smaller than that in the conventional method. can do. As a result, it is possible to obtain a yarn having a good yarn physical property with less fluff and a good-quality package formed by winding the yarn and having no bulge. Furthermore, by adopting a tubular flow and adjusting the flow rate to match the accompanying flow, it is possible to prevent uneven cooling and swaying of the yarn. As a result, good dyeability can be obtained.

The spinneret and the take-up shaft extend in a direction orthogonal to the machine base at intervals in the longitudinal direction of the machine base, and a space for exchanging a wound package is set in a direction parallel to the machine machine longitudinal direction. Therefore, there is no need for a space for exchanging packages between machine bases, and the space utilization efficiency of the factory can be improved.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a multi-spindle spinning device according to the present invention.

FIG. 2 is a front view of the multi-spindle spinning device shown in FIG. 1, where (A) shows a winding state and (B) shows positions of a heating cylinder and a cooling cylinder in a cleaning state.

FIG. 3 is a side view showing the spinning unit in a state corresponding to FIG. 2 (A).

FIG. 4 is a side view showing the spinning unit in a state corresponding to FIG. 2 (B).

FIG. 5 is a front view of a multi-spindle spinning device similar to FIG. 2 showing another embodiment of the heating / cooling air attaching / detaching device.

FIG. 6 is a front view schematically showing a multi-spindle spinning device according to the present invention using an associated flow compensation type cooling cylinder.

FIG. 7 is a perspective view showing a conventionally known multi-spindle spinning device.

[Explanation of symbols]

 2, 2a, 2b, 2c, 2d ... Spinner 3 ... Heating tube 4 ... Cold air tube 6 ... Thread 7 ... Package 8 ... Winding machine 10 ... Heating / cooling air tube attaching / detaching device 11 ... Running rail 12 ... Cylinder 12a ... Piston 14 ... Wheels for traveling 15 ... Work platform 20 ... Rotary actuator 21 ... Arm 22 ... Pin

Claims (1)

(57) [Claims] 1. A plurality of package take-up shafts whose axes are substantially horizontal are arranged vertically from the machine stand along the longitudinal direction of the machine stand, and each of the package take-up shafts has a plurality of packages. A multi-spindle spinning method in which a thermoplastic synthetic polymer is wound into a package from a spinneret through an annealing zone and a cooling zone by using a spinning device in which the fibers are wound side by side along the axial direction of the winding shaft, The take-up speed is 6000 m / min or more, and the yarn-spinning holes for multiple packages on each take-up shaft are in a line that is orthogonal to the longitudinal direction of the machine base and parallel to the axis of the take-up shaft. Around the yarn discharged from each spinneret is surrounded by a spinning cylinder whose lower end is open, and a cooling part is provided to supply an amount of cold air corresponding to the associated flow rate. Multiple winding shaft packages A multi-spindle spinning method, characterized in that the yarns from the corresponding spinner to the cage are run only in one plane including the axis of the spinneret and the winding shaft.