Nitto Boseki Co., Ltd.

Toshiaki Kikuchi

Koji Nakazawa

Toshihito Fujita

Hiroaki Shono

Shin Kasai

Yutaka Kawaguchi

Michio Sato

Isao Wakasa

Toshio Noji

Kogi Nakazawa

Tomoko Fujita

A fiber bundle cutting device is disclosed which includes an elastic roller; a cutting roller having a plurality of thin plate-like cutter blades extending radially therefrom, the cutter roller being disposed in parallel relation with the elastic roller in such a manner that the cutter blades can be slightly pressed against a surface of the elastic roller; a plurality of push-out members each movably mounted between a respective pair of the cutter blades and disposed adjacent to one another; and ring members respectively holding the opposite ends of each of the push-out members to maintain the push-out members in a generally cylindrical configuration; the ring members and the push-out members held by the ring members being movable to an eccentric position relative to the cutter roller so as to progressively move from the proximal to the distal edge of the cutting blades during the operation of the cutting device to discharge the cut pieces of a fiber bundle.

Fiber bundle cutting device

Apparatus for reciprocating a yarn guide to wind yarn on a bobbin including a rotating scroll cam provided with an endless helical cam groove and a second cam groove in superposed relationship with the endless cam groove and having a greater lead angle than the endless cam groove over a predetermined distance adjacent each turning point. The yarn guide is provided with an elongate ship-shaped cam follower slidably fitted into the endless cam groove and pivotable with respect to the yarn guide and a cylindrical cam follower slidably fitted into the second cam groove. The width of the portion of the endless cam groove adjacent each turning point is gradually increased toward the turning point so as to permit the elongate cam follower to smoothly reverse its direction when it passes the turning point.

Traverse motion for use with apparatus for winding continuous elongate

An air nozzle apparatus for directing air flow against the undersurface of an orifice plate of a glass fiber drawing forehearth, having an air introducing section having a manifold formed with at least one air supply port, and an air nozzle section formed with a plurality of nozzle channels communicating with the manifold. The air nozzle section has a plurality of nozzle ribs of substantially the same shape each having opposed side surfaces and opposed end edge portions. The plurality of nozzle ribs are arranged to have their side surfaces located in adjacent relationship to provide a nozzle block. Each nozzle rib is formed on at least one of the opposed side surfaces with a longitudinally extending recess which defines one of the plurality of nozzle channels between the adjacent nozzle ribs.

Air nozzle apparatus for use in drawing glass fibers

A traverse motion used in combination with a device for winding a continous elongate element such as a strand consisting of a large number of glass filaments drawn through a bushing with a large number of nozzles. In the traverse motion of the type including a scroll cam with an endless cam groove consisting of at least one pair of right- and left-hand grooves joined at each end and a strand guide which has a cam follower fitted in the endless cam groove of the scroll cam and is adapted to reciprocate along a straight path in parallel with the axis of the shaft of the scroll cam when the latter is rotated, the lead angle of the endless cam groove is increased adjacent to its ends or adjacent to each returning point of the cam follower so that the guide is increased in velocity adjacent to each returning point. With a conventional scroll cam the traversing motion of the strand at the downstream of the strand guide lags behind that of the strand guide in the case of winding the strand into package on a spool so that the ends of a package being formed are increased in diameter as compared with the intermediate portion between them. When the strand guide is increased in the manner described above adjacent to each returning point, the flange-like increased-diameter distortions at the ends of the package can be avoided and high-quality packages with square ends can be produced.

Traverse motion used in combination with device for winding a continuous

A cutting roller 2 of a glass filament chopping apparatus mounts a plurality of spaced, axially parallel cutting blades 19 held in receiving grooves 20 by retainer strips 21. The peripheral flange surfaces 24, 25 of the cutting roller on the opposite ends of the roller drum 18 are raised to almost the radius of the cutting blade edges, and serve as driving engagement surfaces when the rotating cutting roller is biased into contact with a feed roller 1.

Roller apparatus for cutting glass fibers

A system for manufacturing chopped strands of glass filaments wherein a multiplicity of glass filaments are extruded through orifices in the bottom of at least two spinning furnaces and a sizing agent is applied and the filaments are collected to form at least two strands. The strands brought into contact with the circumferential surface of a feed roller through a predetermined angle so as to be drawn and attenuated by frictional force exerted by the circumferential surface of the feed roller while the strands are cut into chopped strands of a predetermined length with a cutter roller in contact with the feed roller. An auxiliary feed roller is disposed adjacent to one end portion of and in axial alignment with the main feed roller and is driven independently thereof. An auxiliary cutter roller is adapted to contact under pressure the circumferential surface of the auxiliary feed roller to rotate therewith. When introducing a strand onto the main feed roller, the auxiliary feed roller is maintained substantially stationary or driven at a relatively low speed while the main feed roller is rotated at a normal attenuation speed, and the strand is wound on and taken up by the auxiliary feed roller. The speed of the auxiliary feed roller is gradually increased to a normal attentuation speed, and thereafter the strand on the auxiliary feed roller is moved onto the main feed roller.

Method and apparatus for introduction of glass filament strand onto feed

An apparatus for manufacturing a glass fiber chopped strand mat is disclosed, in which the dropping direction of chopped strands is detected at all times, so that whenever the dropping direction is varied, immediately the relative position of an axis of a feed roller and an axis of a cutter roller with respect to a stationary structure is displaced so as to correct the dropping direction thereby to uniformly accumulate the chopped strands on a conveyer means.

Apparatus for manufacturing a glass fiber chopped strand mat

In a process for spinning glass fibers continuously from a nozzle plate having 25- 200 orifices per cm.sup.2, a start-up operation is improved by using the nozzle plate made of a material having a contact angle of 60.degree. or more, drawing flooded molten glass which has spread over the whole undersurface of the nozzle plate at a greater speed than the flowing speed of the molten glass by its own weight from each orifice, while maintaining the normal spinning temperature, and finding the ends of the individual filaments.

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Fukushima, Japan

Toshiaki Kikuchi