Glass manufacturing – Processes – Forming product or preform from molten glass
Patent
1987-11-20
1989-05-16
Lindsay, Robert L.
Glass manufacturing
Processes
Forming product or preform from molten glass
65 43, 65 101, 242 18G, 242 42, C03B 3712
Patent
active
048306479
ABSTRACT:
A method of manufacturing glass yarns includes the steps of: forming a large number of glass filaments by drawing molten glass through a large number of orifices formed on the bottom of a bushing; forming a plurality of strands by separately gathering the large number of glass filaments after a sizing agent has been applied thereto with a plurality of gathering rollers aligned in such a manner that they are separated from each other by a predetermined gap; winding the plurality of strands on one winding tube mounted on a collet while traversing the strands by one traverse motion thereby forming one cake; drawing out the ends of the plurality of strands from the outer periphery of the cake and rewinding the cake in the state wherein the strands are separated from each other by a rewinder after the cake has been air dried; and winding each of the strands as a glass yarn on a bobbin while twisting it. In this method, the gap between adjacent gathering rollers, the drawing speed, and the rotational speed and shape of the traverse motion are set such that they ensure that the plurality of strands which are wound on the winding tube so as to form the cake are separated from each other by 2 to 3 mm, and that the average length of the adhered portions of the strands which are formed by being passed through the turns of the traverse motion is between 150 and 350 mm, thereby solving the problems involving the generation of fluffs and breakage of filaments and enabling glass yarns of good quality to be manufactured efficiently.
REFERENCES:
patent: 3254978 (1966-06-01), Hayes
patent: 3273812 (1966-09-01), Lacasse
patent: 3933456 (1976-01-01), Roberson
Lewen Bert J.
Lindsay Robert L.
Nitto Glass Fiber Mfg. Co., Ltd.
Sternberg Henry
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