Toyo Seikan Kaisha, Ltd.

Hideki Yagishi

Kiyoshi Kawaguchi

A nozzle device for extruding multiple synthetic resins as a resin composite, having a main extrusion flow passage having a main extrusion opening, a subsidiary extrusion flow passage having a subsidiary extrusion opening, at least a downstream portion of the subsidiary extrusion flow passage being disposed in the main extrusion flow passage, and an opening-closing member for opening or closing the subsidiary extrusion opening. The nozzle device further has an auxiliary extrusion flow passage which has an auxiliary extrusion opening and at least a downstream portion of which extends through the main extrusion flow passage as it surrounds the downstream portion of the subsidiary extrusion flow passage. The auxiliary extrusion opening is positioned downstream of the subsidiary extrusion opening and the downstream end portion of the auxiliary extrusion flow passage has a tapered part. The auxiliary extrusion flow passage is designed such that when the opening-closing member is held at a position at which it closes the subsidiary extrusion opening, a synthetic resin flowing through the auxiliary extrusion flow passage and extruded into the main extrusion flow passage through the auxiliary extrusion opening flows while undergoing collision with the forward end portion of the opening-closing member.

Apparatus for extruding multiple synthetic resins

Disclosed is a synthetic resin feeding apparatus including an extruder having an extrusion plate with an extrusion opening formed therein and a cutting tool for cutting molten synthetic resin extruded from the extrusion opening. The extrusion plate is formed to have a tapered portion. The extrusion opening opens to the front end surface of the tapered portion.

Apparatus for feeding and cutting synthetic resin

A nozzle device for extruding multiple synthetic resins as a resin composite, including a main extrusion flow passage having a main extrusion opening, a subsidiary extrusion flow passage having a subsidiary extrusion opening, at least a downstream portion of the subsidiary extrusion flow passage being disposed in the main extrusion flow passage, and an opening-closing member for opening or closing the subsidiary extrusion opening. The nozzle device has an auxiliary extrusion flow passage which has an auxiliary extrusion opening and at least a downstream portion of which extends through the main extrusion flow passage as it surrounds the downstream portion of the subsidiary extrusion flow passage. The auxiliary extrusion opening is positioned downstream of the subsidiary extrusion opening and the downstream end portion of the auxiliary extrusion flow passage has a tapered part. The auxiliary extrusion flow passage is designed such that when the opening-closing member is held at a position at which it closes the subsidiary extrusion opening, a synthetic resin flowing through the auxiliary extrusion flow passage and extruded into the main extrusion flow passage through the auxiliary extrusion opening flows while undergoing collision with the forward end portion of the opening-closing member.

Nozzle device for extrusion of multiple synthetic resins

A method of compression molding of a synthetic resin material in the heat-melted state by the cooperative action of a male mold assembly and a female mold assembly. The female mold assembly includes an outside member having a central opening and an inside member movable relative to the outside member through the central opening. A pre-mold-closing step of moving the outside member to a predetermined closed position is carried out, and thereafter, a compression molding step of moving the inside member to a predetermined closed position and compressing the synthetic resin material is carried out. Also provided is a synthetic resin feeding apparatus including an extruder having an extrusion plate with an extrusion opening formed therein and a cutting tool for cutting the synthetic resin in the heat-melted state extruded from the extrusion opening. A tapered portion is formed in the extrusion plate, and the extrusion opening is opened to the front end surface of the tapered portion.

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Yokohama, Japan

Hideki Yagishi