Toyota Jidosha Kabushiki Kaisha

Ube Industries, Inc.

Ube Machinery Corporation, Ltd.

Ube Kosan Kikai Kabushiki Kaisha

Ahresty Corporation

Hiroaki Furuya

Tsukasa Kato

Yoshiki Matsuura

Hidenori Uebayashi

Kaoru Fujii

Yoshiaki Kanoh

Hiroyuki Takatori

Takashi Hirai

Tadaaki Higuchi

Junji Manabe

Fumiaki Matsubara

Hidenori Uebayasha

Shinji Sannakanishi

Yoshiaki Kanou

A clamp includes (a) a first engager that engages with engagement parts formed at ends of the tiebars at the moving platen side after moving the moving platen in the fixed platen direction to close a die or mold, in the tiebar insertion holes of the moving platen, (b) a second engager that engages with engagement parts formed at ends of the tiebars at the fixed platen sides detachably at ends of clamping pistons using a detachable engager, (c) a pushing device that cooperates with the tiebars and pushes the moving platen after die or mold closing against the fixed platen in the tiebar insertion holes of the fixed platen, and (d) a tiebar inserting and extracting device coupled with ends of the tiebars at the fixed platen sides at a side of the fixed platen opposite to the die or mold mounting surface.

Tiebar reverse extraction clamp

Die opening-closing means includes a servo motor and a movement conversion mechanism and is disposed between a support plate and a base stand. A movable plate is mounted on the support plate that is disposed on the base stand via a linear movement guide. In a forging cycle, die opening and closing is performed by activation of the die opening-closing means and tie bar fixing means at a rear surface side of the movable plate, and clamping force is obtained using a die clamping cylinder provided in the movable plate. When it is necessary to change over exclusive dies and change over is performed by: extending tie bar removal cylinders provided in a frame behind the movable plate so as to remove tie bars from a fixed plate; and moving a movable rail of internal rails to an open position and moving the change over carriage in along the internal rails from the outside.

Molding apparatus and die changing apparatus for exclusive die

Die opening-closing meansincludes a servo motorand a movement conversion mechanism and is disposed between a support plateand a base stand. A movable plateis mounted on the support platethat is disposed on the base standvia a linear movement guide. In a forging cycle, die opening and closing is performed by activation of the die opening-closing meansand tie bar fixing meansat a rear surface side of the movable plate, and clamping force is obtained using a die clamping cylinderprovided in the movable plate. When it is necessary to change over exclusive diesand, change over is performed by: extending tie bar removal cylindersprovided in a framebehind the movable plateso as to remove tie barsfrom a fixed plate; and moving a movable railof internal railsto an open position and moving the change over carriage in along the internal railsfrom the outside.

In a molding machine, a fixed platen which supports a fixed die is disposed on one end of a base plate. A movable platen which supports a movable die and a supporting mount which supports each one end portion of the four tie bars are mounted on slide units. The movable platen and the supporting mount are advanced so as to close the die, a tip portion of each tie bar is locked to the fixed platen by a lock mechanism, and a die clamping cylinder provided on the movable platen is actuated to generate a clamping force so as to execute molding. After that, the lock mechanism executes an unlocking operation so as to cause the movable platen and the supporting mount to retreat to a die open position. Furthermore, an attaching and detaching mechanism releases the die clamping cylinder so as to cause only the supporting mount to significantly retreat from the movable platen, and thus the four tie bars are completely evacuated from the fixed die and the movable die.

Molding machine and molding method

An improved process and apparatus for blow molding of engineering plastic materials, using a mold and an extrusion machine with a die for producing a hollow plastic parison to be partially received in the mold. An extrusion operation and a preblowing operation with air from the die into the parison are concurrently commenced at a high extrusion speed and a low air pressure, with a material remaining in the die being integrated with an upstream portion of a preceding parison prepared in a preceding blow molding run, to complete the downstream parison. The upstream portion has a closed and free lower end prepared in the preceding run. The apparatus is provided with a pinching and cutting device for self-adhering and separating the completed parison above and in the vicinity of the mold to prepare the above mentioned closed free end. In an embodiment, a heater is provided to heat the upstream parison portion immediately after the parison is separated into the upstream portion closed at the free lower end and a downstream portion to be received in the mold for blow molding and until immediately before a next extrusion.

Blow molding process and apparatus for producing hollow plastic articles

A method and apparatus for injecting and mold clamping control of an injection blow molding machine, wherein a parison injected downward from a die between mold halves defining a cavity is detected to thereby determine the dynamic locus of its free end. In every run the mold clamping is commanded to start before the end of injection is commanded and is effected according to the clamping operational conditions determined based on the parison locus determined in the instant or preceding run. In one method a clamping starting time is determined by a calculation with a predetermined clamping stroke speed. In another alternative method an initial clamping stroke speed is determined by a calculation with a predetermined clamping starting time and following stroke speed. In the alternative methods the end of injection is commanded at the time, predicted by a calculation, when the free parison end reaches a predetermined vertical position down from the end of the cavity where the inner horizontal end of each mold half is spaced a predetermined horizontal distance from the outer face of the parison. The mold clamping is switched from the initial stroke speed to the following speed at the predicted time.

Method for controlling injecting and mold clamping in a blow molding

Growing community of inventors

Ube, Japan

Hiroaki Furuya