Fanuc Corporation

Hiroshi Imamura

Satoshi Takatsugi

Wataru Shiraishi

Hiroyasu Asaoka

Toshio Ishikuro

Wataru Shirashi

A heating cylinder protection cover that covers an entire circumference of a heating cylinder of an injection molding machine is configured from a plurality of protection cover members. Cutouts for cable passing section formation are provided in one or both of a pair of cover members joined to each other among the plurality of protection cover members. A cable is drawn out to the outer side of the heating cylinder protection cover through the cutouts for cable passing section formation.

Heating cylinder protection cover for an injection molding machine

Screw rotation speeds and screw rotating torques are measured at predetermined time intervals during metering and substituted into a previously-assumed function to determine a maximum screw rotating torque at each screw rotation speed. An allowable upper limit of screw rotating torque is set for each screw rotation speed on the basis of the determined maximum screw rotating torque. If a screw rotating torque exceeding the allowable upper limit is detected during metering after the allowable upper limit is set, the screw rotation is stopped or changed.

Injection molding machine having function for monitoring screw rotating torques

A mold is mounted with a locating ring mated into a hole in a stationary platen. A distance measuring unit is disposed to the side of the injection nozzle. The distance A between the sprue hole and the outer circumference of the locating ring and the distance B between the distance measuring unit and the outer circumference of the locating ring are both known. The distance C between the central axis of the nozzle hole and the side of the injection nozzle is also known. If the distance D to the side of the injection nozzle is measured by means of the distance measuring unit, the displacement between the central axis of the sprue hole and the central axis of the nozzle hole is obtained by calculating {(A+B)&#x2212;(C+D)}. The injection nozzle is centered by being moved manually or automatically by the amount corresponding to the displacement.

Injection molding machine having a centering device for centering a nozzle hole

The invention provides an injection molding capable of adjusting a detection level with a simple structure and detecting a deposit level of the resin pellets near a plasticizing screw. A cooling jacket is mounted so that a resin supplying hole of the cooling jacket communicates with a resin supplying hole of a heating cylinder. A sensor head mounted on a sensor mounting plate is inserted into the resin supplying hole through a sensor insertion port provided on a hopper plate and a resin inlet and detects the deposit level of the resin pellets deposited in the resin supplying hole. Changing the extent of insertion of the sensor head enables the resin pellets deposit detection level to be changed, and further, enables the deposit level near the outer periphery of the screw to be detected. Setting the sensor detection direction perpendicular to the resin deposit direction enables dirtying of the sensor detection surface by the resin pellets to be reduced, thus enabling erroneous detection readings to be reduced.

Growing community of inventors

Yamanashi, Japan

Hiroshi Imamura