Ube Industries, Inc.

Masashi Uchida

Toyoaki Ueno

Sadayuki Dannoura

Minoru Kuriyama

In a die casting apparatus, mold opening/closing units are mounted on carriers and the carriers are freely moved in/out from a mold clamping unit in a lateral direction. The mold clamping unit includes at least two guides for guiding each of the carriers from a standby position to a predetermined position in the mold clamping unit and a stationary board having a higher portion formed at a portion sandwiched by the guides. Each of the carriers includes a lift unit for moving upward/downward the mold opening/closing unit. When each of the carriers is to be moved, the lift unit positions the mold opening/closing unit at a height at which the mold opening/closing unit can freely move without colliding against the higher portion, moves the mold opening/closing unit into the mold clamping unit, and then moves downward and places the mold opening/closing unit on the higher portion of the stationary board.

Die casting apparatus

In a horizontal mold clamping and vertical injection type die cast machine, when molds are opened, a product is held by a product holding device. When mold opening is completed, the product is pushed out by a product push out device mounted to a stationary metal mold side of the machine.

Horizontal mold clamping and vertical injection type die casting method

A vertical die casting machine of a vertically clamping type provided with a hydraulic piston-cylinder to actuate movable parting plates disposed between an injection sleeve and a runner hole in a stationary mold for constricting a melt passage, the parting plates defining an axial through-hole in a clamped state. The parting plates prevent a semi-solidified part of the melt 'shell' formed in the sleeve before an injection operation from intruding into a die cavity with the liquid melt. In an embodiment with a narrow runner hole having a diameter smaller than that of the sleeve, the parting plates move together to shear a cold melt runner from the cold melt bisket formed in the sleeve so that a cast product may be upwardly removed from the stationary mold. In another embodiment with an enlarged runner hole having a diameter not less than that of the sleeve, the parting plates move away from each other to allow an integral piece including the bisket formed in the sleeve, the runner formed in the runner hole, and the cast product, to be removed upward through the stationary mold and the enlarged runner hole.

Vertical die casting machine

Disclosed is a degassing apparatus incorporated with a molding apparatus having a mold cavity, which includes a spool having a bore formed therein. The spool further has formed therein a gas inlet opening adapted to be communicatively coupled to the mold cavity of the molding apparatus, and a gas outlet opening, the gas inlet and outlet openings being in selective communication and non-communication with each other. Means for selectively controlling the communication and non-communication between the gas inlet and gas outlet openings, are provided. Also provided is a flanged piston mounted in the bore and coupled to the communication controlling means, the piston being reciprocatingly slidable between a first position and a second position, the bore being further formed with an upper chamber and a rod-side chamber situated on opposite axial sides of the piston, and a lower chamber radially surrounding a portion of said piston. The spool further includes first, second and third fluid ports formed therein, the ports being in communication with the upper, rod-side and lower chambers respectively, the lower chamber being in communication with said rod-side chamber when said piston is in the second position, wherein the gas inlet and outlet openings are in non-communication, and the lower chamber being in non-communication with the rod-side chamber when the piston is in the first position, wherein the gas inlet and outlet openings are in communication.

Degassing apparatus for a metal mold

In a die cast machine of the type wherein molten metal in a metal melting furnace is poured into an injection sleeve and the molten metal in the injection sleeve is injected into a die, a ladle having a molten metal discharge port is used to receive the molten metal from the furnace. The lower portion of the ladle is inserted into the injection sleeve. Then the port is opened to discharge the molten metal in the ladle into the injection sleeve and the ladle is continuously raised at such a speed that the level of the molten metal in the sleeve is always maintained at a level near the port.

Method of pouring molten metal into injection sleeves of die cast

A vertical die casting machine comprising: a casting cylinder, pivotably mounted to a base, for activating a piston extension slidably fitted in a casting sleeve, and; a hollow block having an upper end connected to the casting sleeve and having a bore reduced at a lower end thereof through which bore the piston extension extends into the block. The block is forced to move by a ram cylinder relative to the casting cylinder. The piston extension has a radial extension in the block designed so that an engagement of the radial extension with the reduced bore end of the block causes a positional relationship between the casting sleeve and the piston extension to be maintained constant during an axial downward movement of the piston extension driven by the casting cylinder and during an axial upward movement driven by the ram cylinder.

A pull-back ram cylinder apparatus in combination with a vertical mold clamping machine to be incorporated in a vertical molding or casting machine. The pull-back apparatus comprises a hydraulic cylinder for actuating a hollow ram. A ram extension consisting of the ram and a ram rod extending into the ram in a thread engagement is slidably fitted in the cylinder. The ram rod extends downwardly from the cylinder and is connected to a movable platen of the clamping machine carrying a movable mold. The cylinder has a lower throttle portion in which radial openings for discharging an operation oil are formed in an axially spaced arrangement. The inner diameter of the throttle portion is slightly larger than the outer diameter of the ram. The throttle portion having the axially spaced openings serves, in cooperation with the head end portion of the ram, as buffering means by which the movable mold is allowed to come into contact gently with a stationary mold. The thread engagement of the ram and the ram rod is advantageous in that the positional relationship between the movable platen and the ram can be easily adjusted according to the change of the thickness in molds.

Pull-back ram cylinder apparatus

In a vertical die casting machine of the type wherein molten metal contained in a vertical casting sleeve located beneath a stationary platen is cast into a die cavity defined between a stationary die and a movable die urged against the stationary die, the casting sleeve is divided into an upper and a lower part. The upper casting sleeve is secured to the stationary platen in communication with the die cavity. The lower casting sleeve is normally held in vertical alignment with the upper casting sleeve but is moved to a position lateral to the stationary platen for receiving the molten metal. When the lower casting sleeve is returned to the normal vertical position it is urged against the upper casting sleeve and molten metal in the lower casting sleeve is teemed and cast into the die cavity by operating an injection plunger.

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Ube, Japan

Masashi Uchida