Automatic control of the length of a row of articles to be injection-molded.

摘要

A method of automatically controlling the length of a row of articles to be injection-molded on a multi-cavity mold (11,12) having an elongate runner (14) and a plurality of successive cavities (13) spaced equidistantly along the runner (14), comprising the steps of: detecting an initial position of a control rod (20) inserted in the runner (14); registering both the direction and the extent to which the control rod (20) is to be moved for longitudinal adjustment with respect to the runner (14), depending on the initial position of the control rod (20) and a preselected length of the article row to be molded; moving the control rod (20) longitudinally of the runner in the registered direction; detecting the movement of the control rod (20) to the registered extend; and in response to the last-named detecting, terminating the movement of the control rod (20). An apparatus (10) for carrying out this method is also disclosed.