Manufacture of bodies using rice hulls

Details Manufacture of bodies using rice hulls Manufacture of bodies using rice hulls

1998-03-30

2001-02-13

Silbaugh, Jan H. (Department: 1732)

Plastic and nonmetallic article shaping or treating: processes

Direct application of electrical or wave energy to work

Forming articles by uniting randomly associated particles

C264S491000, C264S109000, C264S122000, C264S123000

Reexamination Certificate

active

06187249

ABSTRACT:

This invention relates to the manufacture of cellulosic bodies, such as bodies in the form of panels, sheets, and other formed shapes, and to products of such processes.
In Australian patent specification No. AU-48947/93 there is described a process for manufacturing bodies composed of a binder mixed with a feed material including rice hulls and/or particles obtained by commuting rice hulls. The binder comprises an RF curable composition. The mixture of the feed material and binder is formed into the generally desired shape of the body e.g. in a mould or in a press, and the binder is cured to form an adherent body having substantially the required shape by applying to the formed shape an RF field of a suitable frequency and intensity and for a suitable period of time to cause dielectric heating within the mixture so as to cure the binder to form the final adherent body. The body is then removed from the mould or press.
It is an object of the present invention to improve the process of forming bodies according to the said patent specification or to provide useful alternative or supplementary processes for forming bodies using rice hulls.
According to the present invention there is provided a process for forming a body of rice hulls, the process comprising: mixing rice hulls with a binder, the binder comprising a composition whose setting requires or is accelerated by heat; forcing the mixture of the rice hulls and binder into a generally desired formed shape of the body at a forming station; raising the temperature substantially throughout the formed shape of the body until a parameter indicative of or associated with the start of setting of the binder reaches a predetermined level or is observed; and progressing the setting of the binder beyond the start of setting until the binder has substantially fully cured. By monitoring the heating to determine the start of setting of the binder, and treating the subsequent curing as a separate process stage, greater control of the process is achieved, and production and product costs and quality can be optimised.


REFERENCES:
patent: 3207819 (1965-09-01), Raddin et al.
patent: 3668286 (1972-06-01), Brooks et al.
patent: 3927235 (1975-12-01), Chow
patent: 3930089 (1975-12-01), Vasishth
patent: 4111744 (1978-09-01), Reiniger
patent: 4162877 (1979-07-01), Nyberg
patent: 4382847 (1983-05-01), Akesson et al.
patent: 5096409 (1992-03-01), Stofko
patent: 4894793 (1994-05-01), None
patent: 6892394 (1995-07-01), None
patent: 2084212 (1982-04-01), None

Affiliated with

Also associated with

Rating

Manufacture of bodies using rice hulls does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Manufacture of bodies using rice hulls, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Manufacture of bodies using rice hulls will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2569372