US 6,432,333 B1 · Nozzle touch apparatus for injection molding machine

Abstract

An injection apparatus is disposed to be movable relative to the frame. A driver advances and retracts the injection apparatus. An energy absorption element is disposed between the driver and the frame and adapted to absorb mechanical energy relating to the nozzle touch force. A buffer member may also be disposed between the injection apparatus and the driver. In this case, variation in nozzle touch force due to overload can be adjusted by the action of the buffer member. Accordingly, when the buffer member is adjusted so as to reduce the variation in nozzle touch force due to overload, an excessively large nozzle touch force is not generated, so that breakage of the mold apparatus and the nozzle can be prevented. Further, resin is prevented from leaking from any clearance between the injection nozzle and the molding apparatus.

Claims22

Dependent claims

A method of operating an injection molding machine comprising:

a) driving an injection nozzle against a mold with a driver;
b) sensing a deformation of a first spring positioned between the driver and a frame;
c) stopping the driving in step (a) in response to a deformation sensed in step (b);
and
d) absorbing shocks to the injection nozzle with a second spring positioned between the driver and the injection nozzle.

2 more elements

Dependencies are inferred from the claim text.

Nozzle touch apparatus for injection molding machine

Life of this patent

Nozzle touch apparatus for injection molding machine

Life of this patent

Abstract

Claims22