Toshiba Kikai Kabushiki Kaisha

Toshiba Machine Co., Ltd.

Kabushiki Kaisha Toshiba

Denki Kagaku Kogyo Kabushiki Kaisha

Hiromi Nakamura

Mitsuo Sasaki

Ei Nakamura

Yutaka Hasegawa

Mitsuo Yamashita

Masaji Ishii

Yoshizo Komiyama

Noriyuki Motomura

Sadayoshi Yamada

Zenichi Mochizuki

Hiroaki Abe

Haruji Hosoi

Shogo Serizawa

Yosizo Komiyama

A structure having fine ribs with a high dimensional precision is used as the rear panel of a plasma display or as a micro organism carrier for use in a chemical device. The present invention aims to provide a method for manufacturing such a structure at low cost. According to the invention, a composite sheet comprises a surface layer of silicone rubber and a base layer of a steel sheet. Grooves are formed in the surface layer, and filled with a paste material. The paste material is cured to form ribs. After a substrate is placed on the surface layer of the composite sheet, the composite sheet is pressed against the substrate from the base layer side, thereby compressing the ribs and adhering them to the substrate. Thereafter, the ribs and the substrate are removed from the composite sheet. As a result, a structure with fine ribs is obtained.

Method for manufacturing a structure with fine ribs

A member is prepared by forming a magnetic surface layer on a magnetic base member having a different composition from the surface layer. A laser beam is radiated onto the member so as to fuse the member and the surface layer, thereby forming a fused portion having magnetic properties. A modified portion is formed in a portion of the fused portion corresponding to the surface layer such that this portion has different permeability from other portions of the surface layer.

Method of forming modified portion and magnetic recording member using

Method of forming a magnetically modified portion

A magnetic scale includes a magnetic base member and a thin film formed on a surface of the magnetic member by plating or flame spraying nickle, chromium, manganese, silicon, boron, carbon, or a combination thereof. A laser beam or an arc discharge is applied to the outer circumferential surface of the thin film to fuse the metal of thin film and the metal of the base member under heat for thereby forming nonmagnetic modified portions on the surface of the base member.

Magnetic scale and method of manufacturing the same

A die casting apparatus has a sleeve having one end communicating with a die cavity defined by a movable die and a fixed die and connected to a feed pipe, a plunger slidably fitted in the sleeve for forcing molten metal supplied from the feed pipe through the sleeve into the die cavity, and a hydraulic cylinder for moving the plunger in the sleeve. An inert gas supply unit communicates with the sleeve for supplying an inert gas to a passage defined in the sleeve and also to the feed pipe. The inert gas supply unit comprises a closed casing and a gas feed pipe for supplying the inert gas into the closed casing. The casing is connected to an opposite end of the sleeve in covering relation thereto, and has a window for visually checking the interior of the casing therethrough.

Die casting apparatus

A surface of a linear magnetic bar is subjected to such high density energy as a fine beam of laser rays, electrons, ions, plasma or an electric current to change permeability of portions subjected to the high density energy so as to form graduations spaced uniformly. A magnetic sensor is used to detect variation in the permeability, thus measuring movement, speed or acceleration of the scale relative to the magnetic sensor. The scale may be formed on a movable portion of a machine, for example a piston rod of a die casting machine or an injection molding machine.

Metallic scales and method of manufacturing the same

In a pump for use in a hot chamber type die casting machine wherein corrosive molten metal particularly aluminum or alloys thereof is injected into a metal mould through a goose neck shaped passage, a porous ceramic tube having a porosity of 10 to 40% and acting as the goose neck shaped passage is cast in the main body of the pump. The porous ceramic tube comprises sintered zircon or porous graphite.

Pump with porus ceramic tube

The cylinder and piston of an injection pump which are severely corroded by molten aluminum or the like are made of a composite sintered body containing two or more of the compounds selected from the group consisting of boron carbide, titanium diboride, zirconium diboride and boron nitride, and having excellent corrosion resistant, wear resistant and heat shock properties and high mechanical strength. One or more of the compounds selected from the group consisting of borides of tantalum, molybdenum and tungsten; carbides of silicon, zirconium, tantalum, vanadium,chromium, tungsten and molybdenum; nitrides of titanium, aluminum, silicon and zirconium; and oxides of aluminum and beryllium may be incorporated.

Growing community of inventors

Zama, Japan

Hiromi Nakamura