Plastic article or earthenware shaping or treating: apparatus – Shaping orifice and downstream work contacting gaseous... – Orifice for filaments or fibers
Utility Patent
1998-11-25
2001-01-02
Pyon, Harold (Department: 1722)
Plastic article or earthenware shaping or treating: apparatus
Shaping orifice and downstream work contacting gaseous...
Orifice for filaments or fibers
C425S378200, C425S445000, C264S211180
Utility Patent
active
06168406
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to improvements made to the cooling of filaments for forming yarns, and more particularly to a yarn-forming filament cooling apparatus that enables filaments to be cooled in all directions while passing the cooling apparatus at full speed. Yarns produced with evenly cooled filaments shall have stable quality and increased yield rate.
It is known that the quality of filaments for forming yarns has direct influence on the quality of finished products and has close relations with chemicals and temperature control in the production environment. Earlier yarns produced had higher denier and inferior quality due to incomplete manufacturing equipment and techniques than yarns currently produced. Following the increasingly improved equipment and techniques, fine yarns having a diameter about 0.003 mm can be produced at much higher speed than ever before. However, it is still an important object of textile industry to achieve high yield rate of fine yarns having a more stable quality.
In a conventional yarn-forming filament cooling apparatus, there is a quick cooling chamber in which one-direction cooling air is supplied to blow and cool filaments passing therethrough, as shown in FIG.
6
. Following disadvantages are found in such conventional cooling apparatus and require improvement:
1. Filaments pass the quick cooling chamber at a speed as high as 3000 to 7000 meters per minute. When the filaments are subjected to the one-direction air while moving forward, they tend to be shifted to one side and have different temperatures at two sides thereof. Such difference in the temperature of filaments adversely affects the stability of yarns.
2. The one-direction air causes the filaments to shift laterally toward one side that would stop filaments from forming stable yarns. The good yield rate of yarns is low.
SUMMARY OF THE INVENTION
It is therefore a primary object of the present invention to provide a yarn-forming filament cooling apparatus that enables cooling of filaments for forming yarns in all directions to obtain yarns of stable quality, particularly yarns of super low denier.
Another object of the present invention is to provide a yarn-forming filament cooling apparatus- that would not obstruct smooth moving of filaments therein to allow significantly increased yield rate.
To achieve the above and other objects, the yarn-forming filament cooling apparatus of the present invention mainly includes a stand-up air compartment defining a cooling air channel and a quick-cooling air-converge compartment located at an upper portion of the stand-up air compartment. Inner tubes are provided in the quick-cooling air-converge compartment corresponding to filament guiding ports provided on top of the cooling air channel. Each inner tube is provided on a circumferential surface with a plurality of throttle pores, such that when filaments are directed to pass filament guiding ports and inner tubes at high speed, air flowing through the cooling air channel is radially drawn into inner tubes to cool the filaments in all directions while the filaments keep moving forward at full speed. Meanwhile, cooling air is supplied in horizontally opposite directions and supplied into an upper portion of the air-converge compartment without producing lateral resistance to the moving filaments. Whereby, high yield rate of yarns with stable quality can be achieved.
REFERENCES:
patent: 3108322 (1963-10-01), Tate
patent: 3936253 (1976-02-01), Fisher et al.
patent: 5173310 (1992-12-01), Katou et al.
patent: 5262110 (1993-11-01), Spaller, Jr. et al.
Del Sole Joseph S.
Dougherty & Troxell
Pyon Harold
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