Nozzle touch mechanism
AssigneeFanuc Corporation
InventorSeiji Yamasaki
Life of this patent
Estimating the term…
Abstract
In a nozzle touch mechanism for urging a nozzle (3) of an injection unit (1) against a mold (4), the mechanism urges and holds the nozzle (3) against the mold (4) through a simple structure. The threaded portion (11a) of the ball screw (11) of the mechanism is engaged with a ball nut (13) fixed to a pressure plate (12) for moving the injection unit (1) through springs (15a, 15b). When a predetermined flexure of the springs (15a, 15b) is generated to urge the nozzle (3) against the mold (4) with an appropriate urging force, the threaded portion (11a) is disengaged from the ball nut (13) at that point. The threaded portion (11a) holds the injection unit (1) at this position and urges and holds the nozzle (3) against the mold (4) by the flexure of the springs (15a, 15b).
Claims8
A nozzle touch mechanism for rotating a ball screw via a motor, moving a ball nut engaged with a threaded portion of said ball screw and a pressure plate fixed to said ball nut, and moving an injection unit with said pressure plate through a spring, thereby urging a nozzle of said injection unit against a mold by a force generated by flexure of said spring, characterized in that said threaded portion of said ball screw is formed to be disengaged from said ball nut at a position where a predetermined flexure of said spring is generated to urge said nozzle against said mold at an appropriate urging force.
Dependencies are inferred from the claim text.