Drying and gas or vapor contact with solids – Apparatus – Sheet – web – or strand
Patent
1994-07-27
1996-12-10
Sollecito, John M.
Drying and gas or vapor contact with solids
Apparatus
Sheet, web, or strand
34629, 432 59, F26B 1300
Patent
active
055819095
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a heat treatment apparatus for yarn and, more particularly, to a heat treatment apparatus for treating a thermoplastic synthetic fiber, such as polyester, nylon 6 or nylon 66, by a heated fluid, such as steam.
BACKGROUND ART
Steam, which has the advantage of being capable of heating an object extremely rapidly by its condensation heat transmission effect, has conventionally been widely used in applications such as a heat-stretching or heat-fixing step in a synthetic fiber producing process. However, although steam has such an advantage, the following various problems are pointed out in terms of handling.
A first problem is that since the nature of steam greatly varies with pressure, it is difficult to utilize the steam without precisely managing pressure control. In particular, if yarn is to be treated with steam having a low pressure close to atmospheric pressure, the management of pressure control becomes far more difficult. However, since there has conventionally been no means for positively managing pressure control, an operator has no choice but to make a check for abnormality by periodic inspection.
A second problem is that steam is easy to condense. If condensation occurs in a pipe or an apparatus, the liquid water condensate is injected into a heat treatment area in which to heat-treat yarn, so that spots are formed on the yarn and yarn quality is degraded.
A third problem, which is associated with the first problem is that if a multiplicity of yarns are to be respectively heat-treated by heat treatment apparatuses provided for a multiplicity of spindles, it is extremely difficult to reduce differences among the spindles with regard to the pressure, temperature, flow rate and the like of steam. Since it is difficult to eliminate such differences among the spindles merely by improving the precision of production of the apparatuses or the manner of piping, it has been our practice to unwillingly accept some differences in yarn quality among the spindles.
DISCLOSURE OF INVENTION
A primary object of the present invention is to provide a heat treatment apparatus for yarn which is capable of substantially preventing differences from occurring among spindles with regard to the pressure, temperature, flow rate and the like of a heated fluid even if a plurality of heat treatment apparatuses are constituted by heat treatment areas required for a plurality of spindles.
Another object of the present invention is to provide a heat treatment apparatus which is capable of facilitating a threading operation for rethreading yarn after the occurrence of a yarn break or the like, and does not need any complicated operation, such as the operations of starting and stopping supply of a heated fluid or readjustment, each time the yarn threading operation is performed.
The present invention which has been made to achieve the primary object provides a heat treatment apparatus for yarn including heat treatment apparatuses provided for a plurality of spindles disposed at horizontally spaced intervals. The heat treatment apparatus provided for each of the plurality of spindles comprises: (a) a heat treatment tube having in its inside a heat treatment area through which to pass yarn; (b) a heat insulating jacket provided in such a manner as to surround the heat treatment tube; (c) a supply pipe connected so as to supply a heated fluid to the heat insulating jacket; (d) pressure regulating means provided on the supply pipe in such a manner as to be common to the main supply pipe and to the sub supply pipes respectively connected to heat insulating jackets of a plurality of other heat treatment apparatuses; (e) a nozzle provided downstream of a part which provides communication between the heat insulating jacket and the heat treatment tube, the nozzle having an injection opening which is open to the heat treatment area of the heat treatment tube and having, in its inside, means for straightening the heated fluid; and (f) an orifice provided upstream of the part which provid
REFERENCES:
patent: 2622961 (1952-12-01), Finlayson et al.
patent: 3554502 (1971-01-01), Rye et al.
patent: 3778909 (1973-12-01), Ostertag et al.
Arakane Shuko
Sano Takao
Ueda Kunihiko
Gravini Steve
Sollecito John M.
Toray Industries Inc.
LandOfFree
Heat treatment apparatus for yarn does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Heat treatment apparatus for yarn, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Heat treatment apparatus for yarn will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-416962