The Japan Steel Works, Ltd.

Akihiro Naito

Koichi Tamada

Hiromasa Uezono

Shoso Nishida

Takashi Uemura

Ryuki Sakamoto

Hiroshi Ito

Kazutoshi Yakemoto

Kenichi Furuki

Hideaki Nakashima

Katsuyuki Araki

A melting heater configured to melt joining end surfaces of a pair of semi-molded products in a case where the joining end surfaces are melted and joined to manufacture a molded product, the melting heater including: two glass plates arranged in parallel to each other; and a plurality of element heaters arranged in a unit having a flat plate shape as a whole between the two glass plates, in which the glass plate is subjected to surface processing for controlling infrared rays emitted from the plurality of element heaters.

Melting heater and method for manufacturing molded product

The interior of a heating cylinder () is divided into a first stage () and a second stage () due to the shape of a screw (). A first compression zone in which a resin is compressed is formed in the first stage (). A starvation zone () in which an inert gas is injected and a second compression zone in which the resin is compressed are formed in the second stage (). A barrier flight () that is obtained by combining a main flight () and a sub-flight () having a greater lead angle than the main flight is provided to a section of the screw (), said section corresponding to the first compression zone. A multiple flight is provided to another section of the screw (), said section corresponding to the second stage ().

Screw of injection molding machine for foam molding, and injection molding machine

The present disclosure relates to a screw of an injection molding machine in which a heating cylinder is formed with a first compression section, a starvation section, and a second compression section, and in which an inert gas is to be introduced into the starvation section. At a portion of the screw corresponding to the first compression section, a barrier flight as a double flight including a combination of a main flight and a sub-flight having a lead angle larger than that of the main flight is formed, and a dam flight having a predetermined-width ring shape is formed, downstream of, i.e., in front of the barrier flight. A seal structure to prevent backflow of the resin may be provided between the dam flight and the starvation section.

Screw of injection molding machine for foam molding and injection molding machine

A method for manufacturing a molded product with fine structure includes steps of, in a temperature-controlled stamper mold provided with a fine structure including a concavo-convex pattern having a width of 10 nm to 1 &#x3bc;m, forming a thermoplastic molten polymer layer to be in contact with the fine structureof the stamper mold having been kept at a predetermined temperature and holding the thermoplastic molten polymer layer for a predetermined time so as to transfer the fine structure of the stamper mold to the thermoplastic molten polymer layer under gravity.

Method for manufacturing microscopic structural body

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Hiroshima, Japan

Akihiro Naito