Toshiba Kikai Kabushiki Kaisha

Toshiba Machine Co., Ltd.

Isao Matsuzuki

Toshihisa Kamano

Hirotaka Masaki

Yu Murofushi

Satoshi Fukuyama

Yoshihiro Yamamoto

Ryuji Tanaka

Mitsunori Kokubo

Takato Baba

Yoshizo Komiyama

Yuki Sugiura

Hidetoshi Kitahara

Tetsuya Tanioka

Hiroshi Murakoshi

Toru Suzuki

Hiroaki Fujii

Kazunori Urushibata

Shigeru Fujiwara

Toshiyuki Takagi

Yasuo Yamamoto

A shape forming system according to one embodiment includes a mold assemblies; a heating unit; a pressing unit; a cooling unit; an isolation chamber configured to accommodate therein the heating unit, the pressing unit, and the cooling unit arranged in parallel with each other; and a conveyance unit configured to move the plurality of mold assemblies each of which is arranged on a plate provided in each of the heating unit, the pressing unit, and the cooling unit to thereby convey the mold assemblies in sequence.

Shape forming system and shape forming method

A transfer device that transfers a fine transfer pattern formed on a master mold to a molded material, includes a first transfer unit that transfers the fine transfer pattern formed on the master mold to a replica mold made from a material that transmits light; and a second transfer unit that transfers a fine transfer pattern formed on the replica mold by the first transfer unit to the molded material.

Transfer device, molded material and transfer method

A transfer device includes a holding body that holds a molded material; a first roller that holds, together with the holding body, a wound mold and the molded material held by the holding body so as to carry out a transfer, and rotates about a central axis to move with respect to the holding body; and a second roller on which the mold extending from the first roller is wound in a direction away from the molded material held by the holding body, the second roller rotating about a central axis to relatively move together with the first roller.

Transfer device and molded material

A mold set according to embodiment comprising: a die including a plurality of parts and holding a molded material; and a back plate laid below the die.

Mold set

A device for forming a glass semi-product loaded in a die set is comprised of: a first chamber enclosing a heating zone, a waiting zone and a cooling zone arranged in a row along a first direction and being controllable of an atmosphere in the first chamber; a second chamber in spatial communication with the first chamber and closable so as to keep vacuum in the second chamber, the second chamber so neighboring on the waiting zone as to receive the die set moving from the waiting zone in a second direction perpendicular to the first direction; and a ram disposed in the second chamber and movable to get contact with the die set and carry out press-forming on the glass semi-product in the vacuum kept in the second chamber.

Device for forming glass product

In the initial stage of die-opening operation when an upper coremoves upward together with an upper die plate, an upper cavity dieis biased downwardly by an elastic memberso as to press the lower surface of the upper cavity dieagainst the upper surface of a lower cavity dieand keep their contact, thereby forcing a molded glass elementto remain on a lower coreby utilizing the difference in outside diameter between the lower coreand the upper core. This makes it possible to securely release the molded glass elementfrom the upper coreand leave the molded product on the lower coreupon die opening, enabling smooth removal and automated transportation of the molded product.

Die assembly for molding of glass element

The present invention is directed to reduce the total footprint of a press forming system for glass having a plurality of press units, and also to increase an actual availability of each press unit. A plurality of press units are arranged in two parallel rows and a first transfer robot is arranged at the center of the space between the two rows. In adjacent of the moving area of the first transfer robot, a palette changer is arranged. A tray in use is mounted on a first base of the palette changer and a stand-by tray before use is placed on a second base. Blanks and formed products are stored in the tray. Press units equipped with second transfer robots, respectively. In front of the press units, intermediate transfer points are respectively provided for temporarily storing a blank and a formed product.

Press forming system for glass

An object of the present invention is to provide a press forming machine for glass optical devices which is superior in the temperature uniformity and has a low manufacturing cost. An upper die is fixed to a lower end of a fixed shaft, and a lower die is fixed to an upper end of a moving shaft. The upper die and the lower die are accommodated in a quartz tube, and a forming chamber in which atmosphere adjustment is possible is formed inside the quartz tube. An infrared lamp unit is arranged so as to surround the quartz tube. The infrared lamp unit is constituted by a plurality of straight tube type infrared lamps each of which has a vertical axis, and a reflecting mirror is arranged behind each infrared lamp. In this example, straight tube type infrared lamps are used in the infrared lamp unit.

Press forming machine for optical devices

An object of the present invention is to enable to use a common transfer machine for transferring performs to and for transferring products from a press-forming system for glass having a plurality of press units. The press-forming system for glass has a plurality of press units. A linear moving stage is arranged in the proximity of the press units. A transfer robot is mounted on the linear moving stage. A pallet changer is arranged in the proximity of an end of the linear moving stage. A tray presently in use is mounted on a first mount and a new tray on standby is mounted on a second mount on the pallet changer. The inner space of the tray is partitioned into sections so as to correspond to press units in number. In each section, a plurality of pockets is arranged for storing preforms or products one by one.

Press-forming system for glass

An object of the present invention is to facilitate the release of a formed product from a die. A lower die is formed of a die plate, a plurality of cores, a cavity die and a slide plate. In the cavity die, a plurality of first opening portions are formed at the upper side and a second opening portion is formed at the lower surface side. Each of the first opening portion communicates the second opening portion. A core is placed each of the first opening portions. The slide plate is fitted in the second opening portion and supports each core from the lower side. A through-hole is formed in the die plate. The tip of an ejector pin is inserted into the through-hole. The ejector pin is installed in a lower shaft of the machine.

Press-forming machine for glass

A press forming machine for optical devices which manufactures, an optical device from silica glass with a high glass transition point. A transparent quartz tube surrounds an upper die unit, lower die unit, fixed shaft, and moving shaft to form an airtight chamber inside it. Infrared lamps are arranged along the outer surface of the transparent quartz tube, and a reflecting mirror is arranged behind the infrared lamps. A cooling gas jacket is formed to cover the rear surface of the reflecting mirror. The inner-diameter side wall surface of the jacket and the reflecting mirror have many through holes. A cooling gas is sprayed from the interior of the jacket toward the transparent quartz tube through the through holes, thereby cooling the reflecting mirror, quartz bulbs constituting the outer surfaces of the infrared lamps, and the transparent quartz tube.

A method of manufacturing an optical waveguide comprises a first step of laminating, on one major surface of a first glass material, a second glass material to a desired thickness, the second glass material having optical characteristics different from those of the first glass material, a second step of forming the second glass material to have a desired circuit pattern, and a third step of laminating a third glass material having optical characteristics similar to those of the first glass material on an entire surface of the first glass material on which the circuit pattern is formed by the second glass material. In at least one of the first and third steps, the glass material to be laminated is laminated by coupling.

Method of manufacturing optical waveguide

In press molding, a shaft (metal mold 13) is moved by positional or torque control to cause upper and lower molds to reach a set position slightly before a position where the upper and lower molds are set in a final mold closed state. As soon as the upper and lower molds reaches the set position, the control is switched to torque control using a small force which does not deform a glass material to perform feedback control. For this reason, when the cooling process is started, the mobile shaft is moved by the same amount as a contraction amount of the shaft, the actual position of the shaft is moved. However, a tight contact state between the molds and the glass material is kept without changing the thickness of the glass material, and positional control and torque control can be apparently performed at once. Thereafter, when temperature reaches an almost glass transition point, final pressing is performed. A position where the material is press-molded is exactly controlled by correcting an origin position of lower mold by closing the molds before press-molding. According to this method, a highly accurate optical element having thickness reproducibility can be obtained.

Growing community of inventors

Numazu, Japan

Isao Matsuzuki