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US 6,783,708 B2Granted
Method and device for producing short fibers
OwnerMasao Konishiinventor
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OwnerMasao Konishiinventor
Estimating the term…
A short fiber producing device is composed of a rotor having a raw material receiving chamber having outlets disposed in the outer periphery, wherein the centrifugal force concomitant with the rotation of the rotor causes a fluidized body of plastic to be delivered from the outlets to provide short fibers; resin reservoir tanks are provided inside the outlets in the outer periphery of the raw material receiving chamber, so as to amplify the flow pressure produced by centrifugal force.
A short fiber producing device comprising a rotor having a raw material receiving chamber having an outlet disposed in the outer periphery, wherein a centrifugal force concomitant with the rotation of said rotor causes a fluidized body of plastic to be delivered from said outlet to provide short fibers,
A short fiber producing device comprising a rotor having a raw material receiving chamber having an outlet disposed in the outer periphery, wherein a centrifugal force concomitant with the rotation of said rotor causes a fluidized body of plastic to be delivered from said outlet to provide short fibers,
A short fiber producing device comprising a rotatable raw material receiving chamber with a resin reservoir tank for melting plastic in an inner wall surface thereof, and a high frequency induction heating device for inducing a local heating action in the chamber.
A short fiber producing method comprising the steps of feeding crushed pieces of plastic or pellet-like solid substance directly into the raw material receiving chamber in the interior of a rotor, gelling the plastic in the raw material receiving chamber by high frequency induction heating, and delivering the gelled plastic by the action of centrifugal force concomitant with the rotation of the rotor so as to provide short fibers.
Dependencies are inferred from the claim text.
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From the US filing history. Foreign family members aren’t listed.
By agglomeration or compacting: of large particles, e.g. beads, granules, pellets, flakes, slices
Formation of filaments, threads, or the like: by means of rotating spinnerets
Specific disintegrating techniques; devices therefor: extruder as pressing tool with calibrated die openings for forming and disintegrating pasty…
Other particular articles: filamentary material, i.e. comprised of a single element, e.g. filaments, strands, threads, fibres
Term ended 21 Oct 2022 (estimated)
1. Field of the Invention
The present invention relates to a method and device for producing short fibers by converting thermoplastics into short fibers through the use of centrifugal force.
The short fibers produced in accordance with the present invention are intended for use in forming fused molded products as set forth in applicant's prior application Ser. No. 09/331,199, hereby incorporated in its entirety by reference.
FIG. 1 is an elevation, partly in section, of a device, showing a embodiment of the invention;
FIG. 2 is a partial enlarged view of the device of FIG. 1;
FIG. 3 is a view taken in the direction of arrow III in FIG. 2;
In an embodiment shown in FIG. 1, a short fiber producing device comprises a raw material loading section 10, a pre-processing section 20, and a spinning section 30.
The raw material loading section 10 consists of a loading hopper 12, and a cylindrical delivery outlet port 14 formed in the lower portion of the loading hopper 12 is connected to the raw material feeding port of a screw mechanism constituting a pre-processing section 20.
The pre-processing section 20, in this case, is constituted by a screw mechanism, which receives a screw 24 in a casing 22, the screw 24 being adapted to be driven for rotation by a driving unit 26, such as an electric motor. The casing 22 is provided at its front end with a cylindrical discharge pipe 28.