JPS5919734Y2 - Pack for melt spinning - Google Patents

Description

[Detailed description of the invention] This invention relates to a melt-spinning pack in which a melt-spinning mouthpiece plate can be freely attached and detached from the lower part of the pack body with a mouthpiece plate holder via a gasket. The purpose of this is to make it easier to attach and detach the cap plate safely and quickly.

Generally, melt-spinning packs are assembled by housing the spindle plate, distribution plate, filtration unit, etc. from the top of the pack body, and are attached to the spin block, so replacing the spinneret plate requires replacing the entire pack. However, it was impossible to replace only the cap plate alone.

In order to eliminate this drawback, the cap plate can be attached from the bottom of the pack body, and in order to be able to replace the cap plate with the pack (main body) attached to the spin block, a holder is installed on the concave lower surface formed at the bottom of the pack body. Some have a structure in which the base plate is fixed.

Such a cap plate is installed by interposing and fixing a metal gasket between the concave lower surface of the pack body and the cap plate or its holder to prevent leakage of molten polymer from between these parts. However, when replacing the mouthpiece plate, the gasket adhered tightly to the pack body, making removal extremely troublesome and time-consuming.

In other words, when replacing the cap plate, the supply of molten polymer is stopped, but the space above the cap plate is filled with molten polymer, and it is unclear whether this is due to the adhesive force of this polymer or some other cause. When the cap plate is separated, only the gasket remains on the pack body side, and sometimes the cap plate also remains.

This tendency is particularly noticeable when a wire mesh filter with a tab is used also as a packing.

If the gasket remains on the pack body side when replacing the cap plate, it is troublesome to remove it, and it is difficult to remove it unless you use a special jig from below and move it in the horizontal (horizontal) direction. stain the seal surface.

If the sealing surface becomes contaminated with molten polymer, it is necessary to remove it and make it a clean surface, which is also troublesome and undesirable from a safety standpoint.

Generally, when replacing the cap plate, if the gasket can be removed at the same time as the cap plate, it will take at least a few minutes to replace the cap plate with a preheated cap plate, but if the gasket remains as described above, it will take some time to remove or clean it. Even if you hurry, it will take several more minutes, and during this time the lower surface of the pack body will be exposed, so the molten polymer on the lower surface of the pack will cool and solidify, making it impossible to expect good spinning after replacement.

This invention was made to solve this problem,
It has a cap plate, a holder with a hollow stepped surface that supports the cap plate, and a gasket whose size is the same as or smaller than the inner surface dimension of the hollow side wall of the holder, and the gasket is placed on the top surface of the cap plate and is connected to the cap plate. A pack for melt spinning is constructed by inserting a set of packings placed on top of the pack into the hollow inner wall of the holder and attaching it to the lower part of the pack body. It is characterized by having a groove, protrusion, or notch for fixing it.

Hereinafter, the present invention will be explained based on the drawings.

FIG. 1 is a cross-sectional view showing an embodiment of the present invention, and FIG. 2 is a cross-sectional view of essential parts showing the base portion of FIG. 1.

In the figure, reference numeral 1 denotes a pack body in which a dispersion plate 2 having a large number of through holes 3 is formed into one body, and this integrated dispersion plate 2 separates an upper passage part 4 and a lower mouth part 9. are doing.

The filtration section 4 includes a furnace layer 5 made of sand, glass beads, etc.
A top insert 7 and a lock ring 8 are incorporated in the upper part of the wire mesh filter 6.

The cap part 9 is a concave part 10 formed in the lower part of the pack body 1.
A cap plate 11. which corresponds to the dispersion plate 2 and is attached via a gasket 16. The cap plate 11 is made up of a holder 12 having a hollow stepped surface 13 for supporting and fixing the cap plate 11 and a bolt 15, and the cap plate 11 is removably attached to the bottom of the pack body 1.

Here, when the cap plate 11 is supported on the stepped surface 13 of the holder 12, the top surface of the holder 12 is higher than the top surface of the cap plate 11, and a single strip is formed on the inner surface of the holder 12 between these upper surfaces. The mountain-like protrusion 14 is formed in a circular shape.

The protrusions 14 may be two or more, or may be intermittent, or may be groove-like 14 or notches as shown in FIG.

In a pack having such a configuration, the cap plate 11 is the second
As shown in the figure, it is inserted into the hollow part 12' of the holder 12, and the packing 16 is placed thereon.

The gasket 16 has dimensions that are the same as or smaller than the inner dimensions of the hollow side of the holder 12, and its lower half is inserted into the holder hollow portion 12' and comes into close proximity to or in contact with the mountain-shaped protrusion 14. It is integrally fixed to the holder 12 together with the base plate 11.

Next, attach the holder 12 assembled in this way to the bolt 15.
When it is fixed in the recessed part 10 at the bottom of the pack, the bolt 15
Due to the tightening force, the packing 16 is crimped between the lower surface of the pack body 1 and the upper surface of the cap plate 11 and expands in the diametrical direction, so that the mountain-like protrusion 14 bites into the outer peripheral surface of the packing, forcing the holder. 12 (lower position of the protrusion).

Therefore, when replacing the cap plate 11, when the bolt 15 is removed and the holder 12 is taken out downward, the gasket 16 is fixed to the holder 12 (of course, the cap plate 11) and can be removed as a whole at the same time.

Therefore, the replacement of the cap plate 11 can be performed extremely quickly (several tens of seconds) and reliably, and unlike conventional methods, it is possible to remove only the packing, clean the sealing surface of the packing, or deterioration of product quality after replacing the cap plate due to polymer solidification, and spinning. Problems such as imbalances can be completely prevented.

The packing 16 used in the present invention is preferably made of relatively soft metal such as aluminum, copper, or brass, but stainless steel can also be used, and the rim of a rimmed wire mesh filter can also be used as a holder. In addition to protrusions, grooves, notches, etc., the inner surface of the holder corresponding to the seal fixing portion may be formed into a conical shape.

As detailed above, according to the present invention, the hollow stepped surface that supports the cap plate of the holder by being buried therein, and the hollow surface near the upper end thereof are provided with protrusions, grooves, or notches for fixing the gasket. By attaching the cap plate to the pack body, the gasket is forcibly fixed to the holder, and if the holder is removed when replacing the cap plate, the cap plate and gasket can be removed at the same time as one unit, greatly improving work efficiency. do.

In addition, it is possible to quickly and reliably replace the cap plate, and the polymer does not cool and solidify on the exposed surface of the lower part of the pack body, allowing for smooth operation after replacement, and it is easy to fix the position of the gasket when installing the cap plate. The gasket does not shift or fall from the holder, making mechanization such as automatic replacement and installation of the cap plate very easy.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view showing an embodiment of the present invention, FIG. 2 is a cross-sectional view of a main part of the mouthpiece shown in FIG. 1, and FIG. 3 is a cross-sectional view of a main part of another embodiment. 1...Pack body, 13...Stepped surface, attachment.

Claims (1)

[Scope of utility model registration request] It has a cap plate, a holder with a hollow stepped surface that supports the cap plate, and a gasket whose size is the same as or smaller than the inner surface dimension of the hollow side wall of the holder, and the gasket is placed on the top surface of the cap plate and is connected to the cap plate. It consists of a pack for melt spinning that is attached to the lower part of the pack body by inserting a set of packins placed on top of the pack into the hollow side wall of the holder. A pack for melt spinning characterized by having grooves, protrusions, or notches for fastening.