Toshiba Kikai Kabushiki Kaisha

Shinya Itani

Hiroshi Yokoyama

Makoto Tsuji

Takaharu Tashiro

Takato Baba

Takafumi Ookawa

Hiromi Nishihara

Hidetoshi Kitahara

Noriyuki Sasaki

Harumichi Tokuyama

Akira Yoshinaga

Haruhiko Kikuchi

Masahiko Mori

Makoto Takami

Mitsunori Kokubo

Yuji Abe

Saburo Noda

Hiroshi Uchimura

Masaki Yashiro

Yutaka Tsukita

Hiromi Masuda

Kouichi Usami

A machine tool includes: a spindle head; a spindle rotatably supported on the spindle head; a chuck unit configured to chuck a tool inserted in an axis direction of the spindle; a tool holder configured to hold the tool attached to the chuck unit; and a rotary arm configured to move the tool holder to a reachable position of the spindle. The tool holder is supported on the rotary arm by a support mechanism, and the support mechanism includes a displacement following mechanism configured to support the tool holder on the rotary arm in a manner to be capable of displacing the tool holder in a direction intersecting an axis of the tool.

Machine tool

A sheet-shaped mold position detection devicefor conveying and positioning a sheet-shaped mold M on which a fine transfer pattern Mis formed. The sheet-shaped mold position dejection deviceincludes a sheet-shaped mold position detectorthat detects a predetermined region of the sheet-shaped mold M by detecting transmittance of light in the sheet-shaped mold M.

Sheet-shaped mold position detection device, transfer device and transfer method

A transfer systemcomprising: a conveying/positioning deviceconfigured to convey and position a flat sheet-shaped mold MA in a predetermined direction, on which a fine transfer pattern Mis formed; a transfer deviceconfigured to transfer the fine transfer pattern Mto a molding target W, the transfer devicebeing provided on an upstream side in the conveying direction of the sheet-shaped mold MA; and a peeling deviceconfigured to peel off the sheet-shaped mold MA and the molding target from those mutually clinging to each other, after the transfer by the transfer deviceis performed and the conveyance by the conveying/positioning deviceis performed, the peeling devicebeing provided on a downstream side in the conveying direction of the sheet-shaped mold MA.

Transfer system and transfer method

A demolding device detaches a sheet-shaped mold from a molded product. The demolding device includes a molded product holder placed in a location different from a transfer device. The molded product holder is constructed and arranged to hold the molded product while being adhered to a first region of the mold. A detaching roller on which the mold is wound is movably provided above the molded product holder in an extending direction of the mold to roll up and detach the mold from the molded product.

Demolding device

A transfer devicetransfers a fine transfer pattern Mformed on a mold M to a molding target W. The transfer device includes: a base memberincluding a press bodya moving memberincluding a molding target placing bodythat sandwiches and presses the mold M and the molding target W in cooperation with the press body, and is provided on the base memberso that the molding target placing bodycan move; and a moving body supporting bodythat includes a guide portion, and is engaged with and provided integrally on the base memberonly in a region of the base memberelastically deformed very slightly by reaction force when the press is performed, the region being a region where a flexure angle becomes substantially '0'.

Transfer device

A conveying/positioning device includes: a unused-mold placing devicethat places a rolled mold MB of a sheet-shaped mold M thereon; a mold rolling-up devicethat rolls up the flat sheet-shaped mold MA supplied from the unused-mold placing device; and a tension maintaining device that constantly maintains a tension of the flat sheet-shaped mold even if a form of the flat sheet-shaped mold is changed when the peeling is performed.

Sheet-shaped mold conveying/positioning device

A lubrication-condition detector detects a lubricant shortage of a target portion that repeats a predetermined operation at a predetermined cycle. The lubrication-condition detector includes: a physical-quantity measuring unit for continuously measuring a physical quantity related to the target portion; and a computer for determining a presence of a lubricant shortage based on the physical quantity. The computer includes: a cycle extractor for extracting a cycle datum per an operational cycle from continuous data including the physical quantity and its measuring time; a representative-value calculator for calculating a representative value for each of plural cycle data; and determining unit for determining a presence of a lubricant shortage based on the plural representative values.

Lubrication-condition detector, lubricant feeder, injection molding machine and method of detecting lubrication-condition

A new clamping machine is disclosed, which can perform a straight-hydraulic mold clamping and a tie-bar drawing-out operation in a reduced working space, and enables a shortened mold exchanging time, by effecting retraction of a movable die plate and a tie-bar drawing-out operation simultaneously. In order to draw out tie barsfrom a fixed die plateonly when molds are exchanged, annular pistons, which construct mold clamping cylinders in the fixed die plate, are provided. Abutting each piston, a pair of half nutsA,B are arranged and driven to engage with an engagement portionA provided at one end of each tie bar on the side of the fixed die plate, usually, other than during the drawing out operation. A relative position of each tie bar to the half nuts is set to be able to engage with the half nuts when a right end face of the tie bar contacts with the stopper plate. When pressure for clamping molds is increased during such engagement, the annular pistons are driven to transmit a force, for performing an initial operation, to the tie bars.

Clamping machine

A mold clamping apparatus for a die casting machine is provided. The apparatus can include a base, a fixed die plate standing fixedly on an end of an injection side of the base and defining a cavity therein, and a moving die plate arranged so as to proceed and retract on the base facing the fixed die plate and defining a cavity therein. A first versatile main mold can be disposed in the cavity of the fixed die plate and adapted to receive an insert die. Further, a second versatile main mold can be disposed in the cavity of the moving die plate and adapted to receive an insert die.

Method, apparatus, and system for changing a mold in a die casting machine

The present invention provides a die plate and a mold clamping apparatus equipped with the die plate for a die casting machine and so on capable of reducing dimensions of die length as small as possible. A fixed die plate FXPL and a moving die plate MVPL of a mold clamping apparatus on a base BS place a versatile main mold inside, respectively. A pair of insert dies FINS and MINS is carried in to a mold opened space without disturbing tie bars TBU or TBD located in an upper portion or a side portion. The pair of insert dies are separated and fastened to each of the versatile main mold. The die length becomes zero or very small when the moving die plate positions at a mold closing position, and as the result dimension of the mold clamping apparatus in the direction of mold opening and closing can be shortened. Also, particularly the moving die plate can be avoided to tilt.

System for changing a mold in a die casting machine

Method, apparatus and system of changing a mold in a die casting machine

Disclosed is a method for electric clamping, which performs a clamping process in parallel with a core-drawing-in process, avoiding damages of molds and core mechanisms and enabling secure clamping. The method comprises the steps of: setting a check point, for judging safety of the clamping process in advance, in a position that is nearer to the operational start position by a predetermined distance in the mold opening direction than a position of the movable mold when the core-drawing-in process is expected to be completed, wherein the core-drawing-in process and the clamping process proceed in parallel with each other in a straight course for reciprocating a movable mold; activating a core system and a servo-motor to start an operation to draw a core into a cavity in parallel with an operation to move the movable mold in the mold closing direction; detecting whether or not the movable mold reaches the check point; judging whether or not the core reaches the position in which the core is fully drawn into the cavity at a point of time at which the movable mold reaches the check point, and confirming the completion of the core-drawing-in process. Thereafter, the clamping process of the molds is further continued if confirming that the core-drawing-in process is already completed.

Method and apparatus for electric clamping

There is provided a mold clamping apparatus which has a space-saving apparatus construction and can easily carry out mold replacement. The mold clamping apparatus includes: a base; a fixed die plate, fixed on the base, for mounting a fixed mold thereto; a movable die plate, disposed opposite the fixed die plate and movably on the base, for mounting a movable mold thereto; a mold opening/closing means for moving the movable die plate closer to and away from the fixed die plate; a plurality of mold clamping cylinders provided in the fixed die plate; mold clamping pistons fit in the mold clamping cylinders; a plurality of tie bars, each detachably mountable at one end to each mold clamping piston and penetrating the movable die plate and extending; a coupling means for releasably coupling each tie bar to the movable die plate at a position as determined depending on the sum of the thickness of the fixed mold and the thickness of the movable mold; and a tie bar retreating means which, when the movable die plate is in a backward position to form a space for mold replacement operation, moves at least one of the plurality of tie bars, which obstructs the mold replacement operation, backward to a retreat position.

Mold clamping apparatus

To provide a mold clamping apparatus able to suppress spout of a molding material from between mating faces of dies and to extend the lifetime of the dies. A mold clamping apparatus has a control apparatus deciding a distribution of a load divided by a plurality of tie bars based on information concerning to the die and controlling pressure of driving oil of a cylinder chamber of each cylinder for mold clamping independently to become a load having a determined distribution.

Growing community of inventors

Mishima, Japan

Shinya Itani