JPH024687B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a melt spinning device capable of composite spinning in a thermoplastic synthetic fiber spinning device.

[Prior Art] Several structures have been conventionally implemented as apparatuses for melt spinning thermoplastic synthetic fibers. For example, (1) the most commonly used type includes an introduction path for polymer melt-supplied by an extruder or the like into the spinning pack, and a spinning pump for metering the polymer can be inserted into the spinning pack. There is a melt spinning equipment. Although there is no problem in spinning a single polymer with this device, composite spinning is not possible, and the device has the disadvantage that the range of application is narrow as a recent low-volume, high-mix production facility.

(2) The above-mentioned melt-spinning equipment includes multiple types of polymer introduction channels, but on the other hand, it is difficult to spin a single polymer with this equipment due to problems such as polymer deterioration. Or,
There are problems in that each polymer introduction path can only be set at the same temperature, which limits the types of polymers that can be spun into composite fibers.

[Objective of the Invention] The present invention has been made against the background of the above-mentioned circumstances, and its purpose is to provide a thermal processing system capable of both single polymer spinning and composite spinning using multiple polymers, which can be used for low-volume, high-mix production. An object of the present invention is to provide a melt spinning device for plastic synthetic fibers.

[Structure of the Invention] As a result of repeated studies to achieve the above object, the present inventors discovered that heating and temperature control can be performed independently by separating the polymer introduction path from the spin block portion and insulating it. , arrived at the present invention.

That is, the present invention is a thermoplastic synthetic fiber melt spinning apparatus in which a spinning pack can be inserted from the upper or lower part, and which comprises a spin block having a single polymer introduction path and a heating source, and a spin block having a single polymer introduction path and a heating source. and a heating block having one or more separate polymer introduction passages connected to each other via a heat insulating material, and characterized in that the spin block and each heating block have independent heating adjustment means. This is a melt spinning device.

[Example] The present invention will be explained below based on the drawings. FIG. 1 is a plan view showing an embodiment in which composite spinning is performed using a four-spindle spinning pack, and FIG. 2 is a cross-sectional view taken along the line AA in FIG. 1.

In the figure, reference numeral 1 denotes a rectangular parallelepiped spin block main body, and the main body 1 is provided with four vertical holes 2 for attaching spinning packs, and a jacket chamber 3 is formed so as to surround the outer wall of the vertical holes 2. There is. The jacket chamber 3 is filled with a heat medium (for example, Dowtherm, a product of Dow Chemical Co., USA), and can be heated to a predetermined temperature by an electric heater 4 provided at the bottom. A heat insulating material (for example, a board heat insulating material made of calcium silicate) is provided on the upper side of the spin block body 1.
A hollow heating block 7 having four convex ends 7' is disposed at predetermined intervals through 6, and the four ends 7' are located at the upper side of the vertical hole 2. There is. An inlet 8 is provided in the center of the heating block 7 to connect with a polymer supply pipe 12, and a metering pump 13 is provided near the convex end 7'.
are installed respectively, and the inlet port 8 and metering pump 1
3 are connected by introduction pipes 9, 9'. Further, the discharge port 14 of the metering pump 13 is connected to a spinning pack 18 which will be described later.
It is connected to a communication pipe (hole) 10 that leads to.

The hollow part 11 of the heating block 7 has a heat medium (Dowtherm, a product of the Dow Chemical Co., Ltd., Bi, Pb,
The introduction pipes 9, 9' and the communication pipe 10 are filled with a low melting point metal made of a eutectic composition alloy such as Sn, and an aluminum cast heater 15 is used as a heat source outside.
is pasted on it so that the temperature can be adjusted independently (one part is omitted). In this case, the block 7 itself is preferably made of a metal with good thermal conductivity, such as SUS 304.

It goes without saying that the spin block main body 1, heating block 7, etc. can be heated by circulating a known heat medium, by using a gas phase, a liquid phase, or both gas and liquid phases, or by using any heating source.

A spinning pack 18 is inserted into the vertical hole 2 of the spin block body 1 so as to be supplied from above or below and pressed onto the communicating tube 10 by a pack pressing tool 16. The spinning pack 18 has introduction holes 19 and 19' for introducing polymers having different physical properties, a filtration section 20,
20' is for composite spinning having distribution holes 21, 21', a spinneret plate 22, etc., and the introduction holes 19, 19' are connected to the communication pipe 10 of the corresponding heating block 7 and the communication pipe provided in the spin block body. 10'.

Four metering pumps 13' are attached to the spin block body 1 in correspondence with the metering pumps 13.
The discharge port 14' is connected to the communication pipe 10', and
The metering pump 13' is connected to another polymer inlet pipe 1
It is connected to 2'.

Further, a stopper or the like is formed in the vertical hole 2 so that the spinning pack 18 can be easily attached or detached from above or below.

Here, for example, polymer A and polymer B are each melted and supplied by an extruder or the like (not shown) and introduced into the heating block 7 and spin block 1 via supply pipes 12, 12'. This heating block 7
And polymers A and B passing through spin block 1 are
Temperatures are independently set by the Al casting heaters 15, 15' and the spin block heater 4, and are supplied to the connecting portions 23, 23', respectively. Since the heating block 7 is almost completely thermally insulated from the spin block main body 1 by the heat insulating material 6, mutually independent temperature control can be performed satisfactorily.

Polymers A and B supplied through the connecting portions 23 and 23' are introduced into the introduction holes 19 and 1 of the spinning pack 18.
9' and is spun out through the spinneret plate 22.

Next, when changing the composite spinning method to a single spinning method using only the B polymer, it is sufficient to replace the spinning pack 32 with a spinning pack 32 as shown in FIG.
The polymer flows from the spin block 1 to the connecting portion 23'.
The fibers are then spun from the spinning pack 24. In this case, the A polymer will remain in the tube of the heating block 7, but since it is thermally isolated from the spin block main body 1 below by the heat insulating material 6, the heating block 7 can be adjusted to an appropriate temperature or It can be solidified and maintained as it is, and problems such as polymer carbonization within the spin block and clogging of pipes due to deterioration that occur in conventional melt spinning apparatuses do not occur at all.

[Effects of the Invention] Conventionally known melt spinning apparatuses are generally used for single polymer spinning and composite spinning, and there is a problem in that the number of spinning machines increases accordingly. Furthermore, in melt-spinning equipment for composite spinning, it is often difficult to maintain optimal temperatures for multiple types of polymers, and even if it is difficult to spin a single polymer, carbonization and deterioration of the dormant polymer may cause the polymer introduction path to deteriorate. Problems such as blockages occurred one after another.

In this regard, in the melt spinning apparatus according to the present invention, the spin block that heats the spinning pack and one or more heating blocks attached to a part of the spin block can be heated and temperature controlled independently.
It is possible to maintain the temperature of multiple types of polymers at the optimum temperature until immediately before the spinning pack, and even when spinning a single polymer, the heating block of the resting polymer can be cut off from the heating source and covered with suitable insulation material. Since it is possible to solidify the polymer as it is or to maintain the heated state at an appropriate temperature, there are no problems such as carbonization or deterioration of the dormant polymer.

Therefore, according to the melt spinning apparatus according to the present invention, it is possible to alternately operate single polymer spinning and composite spinning within the floor space of one spinning machine, and the quality of the spun yarn can also be improved.

As described above, the melt spinning apparatus according to the present invention enables production of a wide variety of products in small quantities with a small installation floor space, and achieves quality equal to or higher than spun yarn obtained with conventional melt spinning apparatus. becomes possible.

[Brief explanation of drawings]

Fig. 1 is a plan view showing an embodiment of the melt spinning apparatus according to the present invention in which the spinning pack has four spindles, Fig. 2 is a cross-sectional view taken along the line A-A in Fig. 1, and Fig. 3 is a single polymer spinning FIG. 3 is a side view showing the spinning pack at the time. 1... Spin block body, 6... Insulation material, 7
... Heating block, 18 ... Spinning pack.

Claims (1)

[Claims] 1. A thermoplastic synthetic fiber melt-spinning device in which a spinning pack can be inserted from the top or bottom, which includes a spin block having a single polymer introduction path and a heating source, and a part of the spin block equipped with a heat insulating material. and a heating block having one or more separate polymer introduction passages connected to each other via a spin block, wherein the spin block and each heating block have independent heating adjustment means.