Toshiba Kikai Kabushiki Kaisha

Toshiba Machine Co., Ltd.

Yukio Iimura

Yutaka Yamaguchi

Haruyuki Matsubayashi

Mitsunori Kokubo

Masakazu Kanemoto

Akira Kanda

Takashi Yamazaki

Makoto Nishizawa

Kazuhito Kobayashi

Masamitsu Suzuki

Kiyoshi Sasaki

Takamitsu Yamashita

Toshihiro Kasai

Jun Koike

Masahiro Tamaki

Kentaro Ishibashi

Tsuginobu Totani

Fumiyuki Katoh

Nobuyuki Asanuma

Yasumasa Sugiyama

Hidehisa Tanaka

Jyun Koike

A transfer apparatus includes a table on which a molding material is placed, a mold holding body that fixes and holds a mold disposed such as to be opposed to a surface of the table, a gimbal member which holds the mold holding body and which forms a convex spherical surface portion, a gimbal member formed with a concave spherical surface portion which is opposed and in contact with the convex spherical surface portion, a movable body that holds the gimbal member and which can advance and retreat in the vertical direction with respect to the table surface, and an attitude adjusting/holding unit that adjusts and holds attitude of the gimbal member.

Transfer apparatus having gimbal mechanism and transfer method using the transfer apparatus

A mold for an injection molding apparatus includes a light-transmitting part forming at least a portion of the mold, and configured to transmit light to a cavity to be filled with photo-setting resin.

Mold for injection molding apparatus

According to an aspect of the present invention, an imprinting apparatus is provided with: a mount to support a subject body; a movable body capable of moving away from and close to the mount; a support swingably attached to the movable body; a template being attached to the support and including an imprinting face, the imprinting face being patterned to make an impression on the subject body; and a regulator intervening between the movable body and the support and including at least three actuators, the actuators being independently controllably driven so as to regulate an orientation of the imprinting face.

Imprinting apparatus

A transcript apparatus has a base framesupported on one end of a body frame, a support framesupported on the other of the body frame, plural die barsthrough which the frameand the frameare integrally connected, a movable bodyplaced between the guide framesB,B located on both sides of the body frameand freely movable along the die bars, guide meansdisposed on the guide framesB,B on both sides to guide the movable bodyto a position symmetric to a center of the movable body, and drive means mounted on the framefor moving the movable bodyalong the guide means, wherein a given pattern is transcribed from a transcription diemounted on the movable bodyto a forming productplaced on the frame

Transcript apparatus

Method for mold clamping of the present invention is capable of shortening a molding cycle without any initial setting works for an engaging position of a tie bars. The method is constituted the steps of moving the tie bars in the direction of mold closing during mold close operation, judging a relative moving speed between a movable die plate and the tie bar to be within a predetermined value, engaging the tie bars with the movable die plate mechanically by operating an engaging means when the relative moving speed is judged to be within the value, then further moving the movable die plate against a fixed die plate under engagement, and after contact of a movable mold with a fixed mold driving a mold clamping cylinder, thereby executing mold clamping operation.

Method and apparatus for mold clamping in an injection molding machine and the like

An electric injection molding machine capable of maintaining a quality of molded articles and capable of suppressing a variation of weight of articles molded by a mold having a plurality of cavities when transferring molding conditions in a hydraulic injection molding machine as they are to the electric injection molding machine. This electric injection molding machine has an electric injection mechanism for injecting a molding material into a mold by a drive force of an electric motor, an injection control unit and a servo driver for controlling the injection motor so as to follow the injection speed reference, and an reference compensation unit for compensating the injection speed reference based on the characteristics of the hydraulic drive system so that fluctuation characteristics of the injection speed with respect to the injection pressure when controlling the electric injection mechanism approximate the fluctuation characteristics of the injection speed with respect to the injection pressure in the hydraulic injection mechanism performing the injection of the molding material to the mold by the hydraulic drive system.

Method for controlling injection of electric injection molding machine

An electric injection molding machine capable of maintaining a quality of molded articles and capable of minimizing weight variation of molded articles. An electric injection mechanism injects molding material into a mold using an electric motor. An injection control unit and a servo driver control the motor so as to follow an injection speed reference. A compensation unit compensates the injection speed reference based on characteristics of a hydraulic drive system so that fluctuation of injection speed with respect to the injection pressure approximate the fluctuation characteristics of a hydraulic injection mechanism.

Electric injection molding machine for controlling injection of electric injection molding machine

This invention provides a method which makes it possible to reliably detect malfunctions during the ejecting step without rendering the injection molding machine more complicated. An ejector pin is incorporated in the movable die. This ejector pin is connected, via an ejector plate, a connecting rod, a connecting plate and a feed screw, with a servo motor. The force for ejecting the ejector pin pushing a molded product is measured from the driving torque of a servo motor. In this invention, the relationship between driving torque and elapsed time from the initiation of ejection of the molded product is stored as a reference pattern. The tolerance limit and monitoring interval of driving torque are preset relative to the reference pattern. When the value of driving torque falls outside the tolerance limit during the ejecting step, it is judged as a malfunction, and an alarm is generated to stop the machine in a safe state.

Malfunction-detecting method in injection molding machines

A filling step control method of an injection molding machine for filling a molten resin into a die cavity is provided. The control method has the steps of: sampling in initiating the filling step for filling the molten resin into the die cavity by controlling an injection speed and, thereafter, by controlling a filling pressure while not exceeding a predetermined value; storing the injection speed over an entire filling process when a quality product can be stably obtained during the sampling step into a storage medium as a reference waveform; and after storing the reference waveform, molding for filling the molten resin into the die cavity by controlling the injection speed to follow the reference waveform over the entire filling step.

Filling step control method of injection molding machine

The retreat completion position of the screw in the charging step in actual production is controlled based on the result in pilot production as follows. In pilot production, the measurement value Ts of the screw driving torque is integrated with respect to the screw position P from the forward limit to the retreat completion position Ps. When conforming item is produced in the pilot production, the value &Sgr;Ts&middot;dP obtained as a result of the integration is stored as a reference value. After actual production begins, the measurement value Tx of the screw driving torque is integrated in real time with respect to the screw position P from the forward limit to the screw position at each time. The obtained value &Sgr;Tx&middot;dP is monitored. When this value &Sgr;Tx&middot;dP coincides with the reference value &Sgr;Ts&middot;dP, it is determined that the charging step has been completed, and the retreat operation of the screw is stopped.

Method for injection molding

An injection unit including a heating barrel and an injection screw rotationally and axially movable and placed in the heating barrel is disposed on one side of a clamping mechanism for clamping a mold. The injection screw is driven and controlled for operation through a ball screw by an electric motor. Products, each of a moving speed of the ball screw and an operating current supplied to the electric motor in a unit time, are accumulated to calculate a total energy value indicating the amount of total energy supplied to the ball screw. A life energy value is predetermined on the basis of products, each of force generated by the ball screw and a moving speed of the ball screw. It is decided that a life of the ball screw has terminated when the total energy value A is equal to or greater than the life energy B (A&gE;B).

Method of estimating a life of ball screw included in electric injection molding machine and life estimating system

The duty of a current to be supplied to an injection motor is calculated on the basis of the ratio between set injection time for which the injection motor operates and molding cycle time, a shaft torque of the injection motor is calculated on the basis of a set maximum injection force of the injection molding condition, a maximum current for the injection motor is determined on the basis of the calculated shaft torque, and it is decided that the injection motor is overloaded, an alarm is given, a duty for a current that enables continuous molding is retrieved for the maximum current, a state that enables continuous molding is displayed and the molding cycle time determining the duty of the current that enables continuous molding is corrected when the current having the calculated desired duty is smaller than the maximum current.

Growing community of inventors

Suntou-gun, Japan

Yukio Iimura