An injection molding machine is provided with a nozzle touch mechanism configured to press a nozzle attached to an injection device against a mold, a drive unit configured to move the injection device, a drive compression member connected to the drive unit, an injection compression member connected to the injection device, at least one resilient member interposed preloaded between the drive compression member and the injection compression member, and at least one strain sensor mounted on the drive compression member.

An injection molding machine is provided with a nozzle touch mechanism configured to press a nozzle attached to an injection device against a mold, a drive unit configured to move the injection device, a drive compression member connected to the drive unit, an injection compression member connected to the injection device, at least one resilient member interposed preloaded between the drive compression member and the injection compression member, and at least one strain sensor mounted on the drive compression member.

In an injection molding system, an amount of deformation of an elastic member is calculated from image data of the elastic member causing a nozzle to generate a nozzle touch force and a nozzle touch force of the nozzle is calculated by converting the amount of deformation. Accordingly, it becomes possible to detect abnormal conditions such as resin leakage and mold deformation and exercise correct control of the nozzle touch force.