Fanuc Corporation

Naruhiro Nishimura

Koichi Nishimura

Masatoshi Senga

Katsuyuki Yamanaka

Shingo Okada

In a mold mounting platen for an injection molding machine, at least one of a mold mounting member and a clamping force transmission member constituting the mold mounting platen has a central bearing surface in a central portion thereof and a peripheral bearing surface outside the central bearing surface. The amount of protrusion of the central bearing surface is larger than that of the peripheral bearing surface.

Mold mounting platen for injection molding machine

An injection molding machine is provided with a linear guide block configured to be guided on a linear guide rail and a guide mounting block which is secured to the linear guide block and supports the movable platen. Two mounting bolts and two adjust bolts are disposed individually at two positions, spanning between the movable platen and the guide mounting block. The size of a gap between the movable platen and the guide mounting block is adjusted by independently tightening the adjust bolts, whereby the horizontal tilt of the movable platen is adjusted.

Movable platen support mechanism

A guide member having guide faces is mounted on a base frame of an injection molding machine. Adjusting mechanisms are fixed to a platen. The inclination of a moving platen with respect to a stationary platen in a horizontal direction is adjusted by adjusting the projection amount of a member disposed in the adjusting mechanism in abutment against the guide face toward the guide face.

Clamping mechanism for injection molding machine

A toggle type mold clamping mechanism for preventing the degradation of parallelism between stationary and movable platens, which is caused due to a clearance between a pin and a bushing, with use of a simple construction. A mold clamping force acting on the pin is transmitted through the bushing to a link L, thereby moving the movable platen to perform mold clamping. A pre-pressure exerting in the same direction as the direction of a mold clamping force generated at the time of mold clamping is applied by a spring or the like to move the pin toward the link L. Even a mold opening force is exerted at the time of mold opening, the pre-pressure c provided by the spring or the like keeps the position of the clearance &#x3b4; between the pin and the bushing unchanged. Since the link Lpulled by the spring or the like is moved to follow the pin (so that the pin is not moved alone by an amount of clearance &#x3b4;), the parallelism between the stationary and movable platen is not degraded.

Mold clamping mechanism of injection molding machine

Jack-up bolts are provided at two places along the rear platen movement direction on both sides of a lower part of a rear platen of an injection molding machine. The jack-up bolt engages threadedly with a bolt hole formed in the rear platen, and a lower end face of the jack-up bolt abuts on the upper surface of a slide plate to support the rear platen. A fixing bolt is inserted in a through hole formed in the jack-up bolt, and is threadedly engaged with a tap hole provided in the slide plate, by which the rear platen and the slide plate are integrated. The rear platen moves while being supported by the slide plate. When the tilt of the rear platen is corrected, the fixing bolt is loosened and the jack-up bolt is turned, by which a distance between the rear platen and the slide plate is adjusted.

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Yamanashi, Japan

Naruhiro Nishimura