Abstract: Disclosed is a device for use in reshaping the gate of a metal mould for plastic injection moulding. A device A for reshaping the gate recess 7 of a metal injection mould 3 for plastics injection moulding when the recess has become worn comprises a cylinder 9 containing a body 10 which is biased by a spring 15. A cutting tool 13, 13a is mounted on the front of the body 10 and is shaped to re-cut the recess 7 to the required shape. A pin 14 on the tool 13 fits in the gate 6 to centralize the tool 13. A plate 17 with a recess 16 to receive the tip of an injection nozzle 5 is rotatably mounted on the rear end of the cylinder 9 and holds the rear of the device A centered. In operation the cylinder 9 is rotated manually and turns the body 10 and the tool 13 with it owing to the keyway 11 and screw 12 forming a key.

Abstract: Disclosed is an edged tool positioning device which is fixed to the quill of a machine tool for permitting the edged tool to reach a desired X- and Y-coordinate position on a workpiece and for permitting the edged tool thus put at the desired X- and Y-coordinate position to advance a desired distance in the thickness of the workpiece in the Z-direction. Every time the device is brought in contact with at least one selected side and upper surface of the workpiece, a warning unit built in the device informs a worker of the contact by the device with the workpiece, thus permitting him to find a start position and measure a desired distance in each direction.