US3650645A

US3650645A - Spinning chimney

Info

Publication number: US3650645A
Application number: US867130A
Authority: US
Inventors: Seibi Yamada; Reizo Asada
Original assignee: Teijin Ltd
Current assignee: Teijin Ltd
Priority date: 1968-10-25
Filing date: 1969-10-17
Publication date: 1972-03-21
Anticipated expiration: 1989-03-21
Also published as: DE1953720B2; DE1953720A1

Abstract

In a spinning chimney comprising side plates and a back plate such a manner that a front part of the chimney is opened, in which extruded filaments are quenched and solidified by a stream of fluid blown in a direction from the back plate to the front part of the chimney through a screen; a plate at one end is swingably spanned with both front ends of said side plates, and said plate at the other end reclined slantly against the screen in order to remove waste filaments therefrom during the start-up of the spinning operation.

Description

[451 Mar. 21, 1972 United States Patent Yamada et al.

...l8/8 QM m t e n msm me .w c rhm BTSD 13600 6666 9999 1111 4 68 6929 6382 9048 7759 99 2333 m m C MW S .m .1 l.

[73] Assignee: Teijin Limited, Osaka, Japan Primary ExammerRobert D. Baldwin Oct. 17, 1969 Assistant Examiner-Michael 0. Sutton 867,130 Attorney-John Lezdey [22] Filed:

[2]] Appl. No.:

ABSTRACT In a spinning chimney comprising side plates and a back plate [30] Foreign Application Priority Data Oct. 25, 1968 Japan..................... ............43/93141 v a manner that a Part chimney is which extruded filaments are quenched and solidified by a stream of fluid blown in a direction from the back plate to the front part of the chimney through a screen; a plate at one end is swingably spanned with both front ends of said side plates.

and said plate at the other end reclined slantly against the screenin order to remove waste filaments therefrom during the start-up of the spinning operation.

50 m m MM7 5 d 2H 4 m U QM 5" 2" 4 W 1, 7 u l 5 n 2 H m L L c C s m U I U H 5 5 l. l.

[58] Field of Search..........,..........l8/8 QM, 8 OD; 264/176 F 2 Claims, 4 Drawing Figures References Cited Patented March 21, 1972 INVENTORS Ruzo AS DA AND BI YAMADA V1 E W n A SPINNING CHIMNEY This invention relates to a spinning chimney for quenching and solidifying filaments extruded through a spinneret from molten filament-forming polymeric materials, and more particularly it relates to startup spinning chimney for removing waste filaments therefrom during the start-up of the spinning operation. 7""

In a meltspinning apparatus for producing a synthetic fiber from a molten filament-forming material, it is important that filaments extruded through a spinneret are uniformly quenched and solidified by a stream of fluid in a spinning chimney to obtain filaments having a constant denier and uniform dyeing properties along the length thereof. Therefore,

. just under the spinneret extruding filaments there is generally provided a spinning chimney in which a stream of fluid for quenching said filaments blows.

Various types of this spinning chimney are well known in the art. As one type of this spinning chimney is a chimney whose front chimney is opened, whereby a stream of fluid such as air, inert gas,etc., is blown against extruded filaments from the back part of the chimney to the front part thereof so that said filaments can be quenched and solidified. The aforementioned type of the chimney is known what is called as a side-blow spinning chimney and widely available for its easy handling.

This invention is concerned with an improvement of this type of the spinning chimney. In a continuous operation of the melt-spinning for organic filament-forming compositions, it comes to be necessary to exchange a spinning pack for new one when some troubles have been encountered in breakage of monofilament, kneeling or bending phenomena, leakage of molten polymer from seal parts of the spinning pack, and increase of the spinning pack pressure. In the case of exchanging the spinning pack or mounting a new pack before the beginning of the spinning operation, it is necessary to extrude molten polymer for a time enough to exhaust the air from the spinning pack, and also keep extruded filaments up to desired temperature. During that period, waste filaments are extruded so that such waste filaments must be removed from the chimney. Moreover, it is also necessary that extruded filaments are cut off below the spinneret when the trouble of a winding machine or abnormality of the temperature of molten polymer is occurred. If such waste filaments are dropped and passed through the lower part of the chimney, undesired effect has been found in that yarn guides are broken, and oiling rollers and a winding machine are entangled with the filaments. Therefore, it is necessary to provide in the chimney a receiver for receiving waste filaments.

Conventionally a receiver was horizontally mounted in the spinning chimney so that waste filaments extruded through a spinneret are accumulated on said receiver. As a result, it became necessary that when the receiver was fully accumulated with waste filaments, the receiver had to be exchanged for new one with the result that the exchanging works were ultimately troublesome.

It is therefore the object of this invention to provide a spinning chimney having simple means for removing waste filaments with extreme convenience.

This object is accomplished according to this invention which provides a spinning chimney comprising sideplates and a backplate such a manner that a front part of the chimney is opened, wherein extruded filaments are quenched and solidified by a stream of fluid blown in a direction from the back part to the front part of the chimney through a screen positioned between the backplate and said filaments, characterized in that a plate at one end is swingably spanned with both front ends of said sideplates, and said plate at the other end reclines against the screen so as to be slant.

For a full understanding of the invention, a detailed description of the spinning chimney embodying the invention in a preferred form will now be given in connection with the accompanying drawings and the features forming the invention will be specifically pointed out in appended claims.

In drawings;

FIGS. 1 and 2 are front and sectional views of the conventional spinning chimney respectively.

FIGS. 3 and 4 are front and sectional views of the spinning chimney according to this invention.

Referring now to a conventional spinning chimney in FIGS. 1 and 2, numeral 1 designates a spinning assembly under which a spinning chimney 2 is provided interposing a heat insulting plate 3 therebetween. Said spinning chimney 2 comprises

sideplates

4, 5 and a backplate 6 such a manner that a front part of the chimney 2 is opened. A screen 7 is positioned between the backplate 6 and filaments 8 which are extruded through the spinneret 9 housed in the spinning assembly I so as to constitute a plenum chamber 10. A stream of fluid such as air, inert gas and the like is blown against filaments 8 in a right direction to filaments 8 from the backplate 6 to the front part of the chimney 2 through the screen 7 by way of the plenum chamber 10. A duct 1 l is fixed to the lower end of the chimney 2 for guiding a stream of fluid and filaments 8. On the inner surface of both

sideplates

4, 5 are provided rails 12 on which a receiver 13 is mounted horizontally so that filaments 8 extruded through a spinneret 9 are accumulated on said receiver 13. When the receiver 13 is accumulated with full waste filaments 8, it must be exchanged for new one. Therefore, the exchanging works as well as the preparation of the receiver are ultimately troublesome.

In this invention, these troubles are eliminated by providing a spinning chimney having simple means which are hereinafter described.

Supporting means 14 and 14 are fixed to the lower end of the

side plates

4 and 5 respectively, extending from the front part of the chimney 2. On the supporting

means

14, 14 is swingably mounted a bar 15 which is secured to one end of plate 16 which is necessarily so long as to recline against the screen 7 at the other end of the plate 16 and to form a slope on which filaments 8 can slip down. The plate 16 is also so wide as to make a swing motion between the

side plates

4, 5.

At the beginning of the spinning operation, when a number of waste filaments 8 issued from the spinneret 9 are removed from the spinning chimney 2, the plate 16 is set to recline against the screen 7 at the other end as in FIG. 4 so that when said waste filaments 8 fall on the plate 16, they slip down by their weight along the plate 16 and thus fall on the front floor of the chimney 2. Hence, according to this invention it is not necessary at all to do the troublesome work for exchanging the receiver like the conventional chimney. When filaments 8 come to be normally extruded, the plate 16 is swung to a position shown in dotted line by means of such as tools, etc., not shown so that filaments 8 pass through the chimney 2 and the duct 11 onto the bobbin whereby they are wound up. Hence, when the the plate 16 is swung to locate at the position parallel to the duct 11, it does not stand in the way of the spinning operation.

The reclining angle of the plate to the horizontal plane is preferably more than 30 when the plate relines against the screen. If said angle is less than 30, difficulties are encountered in that waste filaments accumulated on the plate do not slip down by their weight from the plate so that the provision of the plate is not significant at all.

As aforementioned, the spinning chimney of this invention has an advantage of simplicity thereof while overcoming the conventional defects.

Although this invention has been described with reference to specific embodiments thereof, it will be appreciated that many variations may be made without departing from the scope of this invention.

We claim:

1. A spinning chimney for crossflow quenching of extruded filaments comprising a back plate; a screen positioned between said back plate and said extruded filaments for introducing quenching fluid therethrough into said chimney; a pair of side plates spaced in parallel and secured to said back plate to form at the opposite side of said back plate an opening for the passage of quenching fluid out of said chimney, and a plate for removing waste filaments pivotally mounted on lower and front parts of said side plates, said plate being slantingly normal filaments are extruded.

reclined against said screen so as to intercept the passage of 2. The Spinning chimney according to claim 1 wherein said the'extruded filaments for moving the waste filaments from Plate for removing waste filaments is slantingly reclined more said chimney when the waste filaments are extruded, and than being pivoted out of passage of the extruded filaments when 5

Claims

1. A spinning chimney for crossflow quenching of extruded filaments comprising a back plate; a screen positioned between said back plate and said extruded filaments for introducing quenching fluid therethrough into said chimney; a pair of side plates spaced in parallel and secured to said back plate to form at the opposite side of said back plate an opening for the passage of quenching fluid out of said chimney, and a plate for removing waste filaments pivotally mounted on lower and front parts of said side plates, said plate being slantingly reclined against said screen so as to intercept the passage of the extruded filaments for moving the waste filaments from said chimney when the waste filaments are extruded, and being pivoted out of passage of the extruded filaments when normal filaments are extruded.

2. The spinning chimney according to claim 1 wherein said plate for removing waste filaments is slantingly reclined more than 30*.