JPH0226943Y2 - - Google Patents

Description

[Detailed description of the invention] <Industrial application field> The present invention relates to a melt-spinning device for thermoplastic synthetic fiber yarn, and more specifically, to a melt-spinning device for thermoplastic synthetic fiber yarn, and more specifically, to facilitate the disassembly of a polymer conduit between a melting part of a high molecular weight polymer and a spinneret part. The purpose of the present invention is to provide a melt spinning device that can perform this process. This invention is particularly useful for spinning synthetic fiber yarns where the polymer tends to solidify, such as carbon fiber, which is a conjugate yarn of carbon and nylon. It is suitable for melt spinning equipment that needs to perform

<Prior art> In conventional melt spinning equipment, a polymer conduit is provided in the spin block to uniformly heat the polymer transferred from the melting section to the spindle section, and the spin block is heated by a heating medium such as dowsum. That's what I do. However, certain polymers,
For example, carbon polymers tend to solidify, and if the polymer adheres to and solidifies in the polymer conduit located at the site where it is likely to accumulate at the beginning and end of the spinning operation, and the solidified polymer mixes into the fibers discharged from the spinneret, the quality of the yarn will deteriorate. This will result in deterioration and thread breakage. Furthermore, if the amount of adhesion inside the conduit increases, the conduit may be completely blocked and spinning may not be possible. In order to prevent such problems, it is necessary to periodically remove the adhered and solidified polymer by incineration or washing.

<Purpose and Structure> An object of the present invention is to provide a melt-spinning apparatus in which a polymer passage portion such as a polymer conduit can be disassembled during such removal work. In the present invention, this purpose is achieved by providing the polymer conduit outside the spin block, and a special structure is also used to solve the problem of uniform heating caused by providing the polymer conduit outside the spin block. I am doing it.

That is, the present invention provides a melt spinning device of a conjugate spinning machine that combines and spins two or more types of polymers. At the same time, a concave space is formed on the outer surface of the spin block from the polymer introduction part to the spinneret part, and a polymer conduit is provided inside for transporting at least one or more other type of molten polymer into the concave space. This melt spinning apparatus is characterized in that a plurality of perforated conduit blocks are embedded, and at least two types of polymers are transferred to the spinneret via conduits formed inside and outside the spin block.

Further, in a preferred embodiment of the present invention, the path of the polymer conduit (hole) bored inside the conduit block is a simple path formed by two approximately straight lines, for example, -1, V, L, etc. on both sides of the block. This is a guide hole that can be drilled using a straight drill. By creating such a guide hole, when cleaning solidified polymer, it is possible to insert a cleaning device such as a drill into both (one) side of the block to easily remove the solidified polymer, or to facilitate cleaning after disassembly. We make it possible to do it quickly.

Embodiments of the present invention will be described below with reference to the accompanying drawings. 1, 2, and 3 are diagrams for explaining one embodiment of the present invention. FIG. 1 is a plan view when no heat insulating material is attached, and FIGS.
This figure shows a cross-sectional view of the main parts of the figure (note that gaps are drawn between each part in the drawing for ease of viewing). The present invention applies to conduit spinning machines, which typically have two or more extruder-like polymer melt sections (not shown).
It has a spin block 1 below it. As mentioned above, this invention targets a conjugate spinning machine, and examples include carbon polymer (hereinafter referred to as A polymer) as a polymer that adheres and solidifies very easily, and nylon polymer (hereinafter referred to as B polymer) as a polymer that does not easily adhere and solidify. This will be explained below using an example. In the present invention, there are two types of polymer conduit equipment for transporting polymers A and B, but since the B polymer conduit is a conventionally known method installed inside the spin block, the explanation will be omitted, and the conduit for A polymer will be focused. Explain. On the upper surface of the spin block 1, a first
A concave space 1a having a shape as shown in the figure is formed. The illustrated embodiment is a melt spinning apparatus that distributes polymer from one polymer melt section to four spinneret sections for spinning, which are connected to the polymer melt section and A
Clamp joint 2 to first divide the polymer into two parts
is located in the center of the concave space 1a. Sho 3 is B
It is a polymer clamp joint. A polymer conduit P is bored inside the clamp joint 2 . The clamp joint 2 is connected with conduit blocks 4, 5, 6, and 7, each of which has a polymer conduit (hole) P drilled therein, so as to transport the polymer to the spinneret part 8, which includes a pack part and a spinneret part. It's summery. Note that a metal O-ring is inserted into the connection portion of each conduit to prevent leakage. The downstream end of the conduit block 4 branches into two directions. A gear pump 9 is also provided above the conduit block 6. Reference numeral 10 denotes a valve block which cuts off the flow of polymer only to the necessary weights when replacing the gear pump 9 or the pack portion, so that the replacement work can be performed in units of weights. Further, 21 is a heating medium such as dowsome sealed inside the spin block 1, and 22 is a sheath heater for heating. 23
is a heat insulating material covering the outside of the spin block 1.

Further, in a preferred embodiment of the present invention, the path of the bent portion of the polymer conduit bored inside the conduit block is a simple path including a substantially L-shape as shown in conduit blocks 6 and 7 in FIG. ing.

<Operation and Effect> In the present invention, a plurality of conduit blocks 4 to 7 each having a polymer conduit perforated therein for transporting molten polymer are buried in the concave space 1a of the spin block 1 and connected together, thereby making it possible to form a polymer conduit P. is forming. Since the conduit blocks 4 to 7 are buried in the concave space 1a and the upper part is sufficiently kept warm,
It is possible to efficiently and uniformly transmit and receive the heat of the spin block 1 heated by the heat medium from the lower surfaces of the conduit blocks 4 to 7 and the vertical surface, thereby spinning the molten polymer without causing uneven heating. I can do it. According to actual measurements by the present inventor, it is possible to maintain the temperature of the conduit block within -3 degrees with respect to the temperature inside the spin block 1.

On the other hand, in the present invention, since the conduit blocks 4 to 7 can be easily removed and disassembled, the adhered and solidified polymer can be removed by periodic incineration or washing. Preferably, by having a spare conduit block for replacement, it is possible to minimize downtime of the spinning machine.

Furthermore, since the polymer conduit used in the present invention has a simple path as described above, by cleaning both sides of the conduit, it is possible to return it to its initial state very easily and reliably.

In addition, so far we have described a melt spinning device of a conjugate spinning machine that combines and spins two or more types of polymers. This is because two or more types of conduits are required, which increases the number of bends, which tends to cause problems such as clogging.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing an embodiment of the present invention, and FIGS. 2 and 3 are sectional views of essential parts of FIG. 1. 1... Spin block, 1a... Concave space, 4
~7...Conduit block, 8...Spinneret part, 9...
...Gear pump, 10...Valve block, 23
...Heat insulation material, P...Polymer conduit.

Claims (1)

[Claims for Utility Model Registration] (1) In a melt spinning device of a conjugate spinning machine that combines and spins two or more types of polymers, the inside of a spin block containing a heating medium is connected to a spinneret part. At least one type of polymer conduit is provided, and a concave space is formed on the outer surface of the spin block that extends from the polymer introduction part to the spinneret part, and at least one or more other type of molten polymer is transferred to the concave space. A melting method characterized in that a plurality of conduit blocks each having a plurality of polymer conduits perforated therein are buried therein, and at least two kinds of polymers are transferred to a spinneret section through conduits formed inside and outside the spin block. Spinning equipment. (2) The melt spinning apparatus according to claim 1, wherein the polymer conduit bored into the conduit block has a simple path formed by two substantially straight lines.