The Japan Steel Works, Ltd.

Kagome Co., Ltd.

Fuji Oil Company Limited

Nagase Co., Ltd.

Fumiaki Tsuda

Mitsuo Nagai

Yoshinori Tokugawa

Takahiro Inakuma

Hiroyasu Furui

Atsuo Teraoka

Hideo Ohyabu

Shuitsu Kirihara

Shigeki Inoue

Tadamoto Sakai

Kazuyuki Nakamura

Motohiko Hirotsuka

Toshiaki Saito

Keiichiro Hirao

Mitsuo Naga

The present invention relates to the step of plasticizing a thermoplastic resin material by rotatably driving a screw (). Also included in the method is the step of injecting an inert gas into a screw cylinder () to permeate the melted resin and injecting the melted resin into a mold by driving the screw () in the direction of injection. Here, the inert gas has a pressure, at least in pressure, equal to or greater than a supercritical pressure or is under a supercritical state. To provide a thermoplastic resin foam by the method, electric servomotors () are employed to drive the screw (). After the step of plasticizing the resin material has been completed, brakes are applied to the electric servomotors () to prevent the screw () from retreating. Alternatively, even after the step of plasticizing the resin material has been completed, the screw () is driven at low speeds in the direction of plasticization until immediately before the step of injecting the melted resin is initiated. This allows foaming inside the screw cylinder ().

Method and apparatus for forming thermoplastic resin foam

The present invention relates to the step of plasticizing a thermoplastic resin material by rotatably driving a screw ( ). Also included in the method is the step of injecting an inert gas into a screw cylinder ( ) to permeate the melted resin and injecting the melted resin into a mold by driving the screw ( ) in the direction of injection. Here, the inert gas has a pressure, at least in pressure, equal to or greater than a supercritical pressure or is under a supercritical state. To provide a thermoplastic resin foam by the method, electric servomotors ( ) are employed to drive the screw ( ). After the step of plasticizing the resin material has been completed, brakes are applied to the electric servomotors ( ) to prevent the screw ( ) from retreating. Alternatively, even after the step of plasticizing the resin material has been completed, the screw ( ) is driven at low speeds in the direction of plasticization until immediately before the step of injecting the melted resin is initiated. This allows foaming inside the screw cylinder ( ).

Method for forming thermoplastic resin foam

A method of plasticizing a material for molding thermoplastic resin foam including the steps of: rotating a screw disposed in a screw cylinder such that rotation and axial movement are permitted to plasticize thermoplastic resin, one of penetrating inactive liquid in a super critical state to molten resin in said screw cylinder and injecting inactive gas having a pressure not lower than the super critical gas pressure into said screw cylinder in a hot state not lower than the super critical temperature to realize a super critical state in said screw cylinder to cause said inactive gas to penetrate said molten resin, and injecting said molten resin for molding a foam member to which said inactive liquid has penetrated into a mold by moving said screw in the axial direction so that thermoplastic resin foam is obtained.

Apparatus for plasticizing material for molding thermoplastic resin foam

In the method and apparatus for continuous roasting of food materials according to the present invention, a food material is mixed up by blades ( ) provided on a paddle plate ( ) via an elastic material ( ) in a tubular cylinder ( ) with open ends. Thus the blades ( ) come in contact, at least once, with all faces of the inner wall of the tubular cylinder ( ) while the screw shaft makes one rotation. As a result, roasting can be completed in a favorable manner.

Apparatus for continuous roasting of food materials

In the method and apparatus for continuous roasting of food materials according to the present invention, a food material is mixed up by blades (,) provided on a paddle plate (,) via an elastic material (,) in a tubular cylinder (,) with open ends. Thus the blades (,) come in contact, at least once, with all faces of the inner wall of the tubular cylinder (,) while the screw shaft makes one rotation. As a result, roasting can be completed in a favorable manner.

Method for continuous roasting of food materials

The method and apparatus of the invention for the continuous roasting of food materials are such that the food material being fed into a heated tubular cylinder is mixed up within and transferred through said tubular cylinder while the vaporized components of the food material are recovered and cooled to liquefy. The apparatus may comprise the horizontally placed tabular cylinder with an open front end, the coil screw inserted into the tubular cylinder in such a way that it can be driven to rotate, and the cooling unit that is connected to a vent port formed in the middle part of the tubular cylinder.

A process for producing an edible proteinaceous film entails kneading and melting a raw material containing water and protein with heating by an extruder, extruding the melted material through a die in an extruder to form a tubular extrudate, providing a gas at a pressure above atmospheric pressure to the interior of the tubular extrudate while exhausting the gas, and holding and receiving the tubular extrudate with a take-off means. An apparatus for use with the method affords edible films. The apparatus and process are particularly advantageous for forming edible films from various sources of soybean protein.

Process for producing edible proteinaceous film

A method of reclaiming a plastic product having a paint film, including the steps of: obtaining crushed particles by crushing a plastic product having a paint film into particles of a predetermined size; supplying the crushed particles to a screw-type extruder; kneading and fusing the crushed particles while supplying water thereto; and obtaining a plastic by discharging a gas produced by decomposing the paint film and vaporized water.

Method of reclaiming plastic product with paint film

A method of forming a composite material involves feeding materials to a kneader, kneading the materials, and injecting them from the kneader into a mold. The kneader is formed by a screw-type extruder having an ejection outlet at one end for extrusion into the mold. Various input ports are located axially along the extruder. Materials are fed into the kneader beginning at the inlet port most remote from the outlet end and proceeding successively to the inlet port nearest the outlet end. The materials are fed in successive order from those with the highest viscosity and lowest reactivity relative to the materials with the highest reactivity and lowest viscosity. For example, thermoplastic is fed to the inlet most remote from the outlet, and thermosetting resin is fed to the inlet nearest the outlet. In another aspect of the invention, in which thermoplastic and thermosetting resins are employed in roughly comparable amounts, an 'island-in-sea' structure is desired. This structure is achieved by agglomerating thermoplastic material having a particle diameter of 0.05-0.5 .mu.m into particles of 10-1000 .mu.m diameter prior to kneading, then introducing the thermoplastic material into the kneader. The thermoset material is then added from least reactive and most viscous to most reactive and least viscous.

Growing community of inventors

Hiroshima, Japan

Fumiaki Tsuda