Patent ID: 7175405
Filing Date: 2007-02-13
Classification: B29C

Abstract:
1. A compression molding machine, comprising: a fixed platen; a movable platen; a lower die being held by said fixed platen; an upper die being held by said movable platen; an open-close mechanism including a screw shaft, which is connected to said movable platen and which is turned by a first servo motor, whereby said upper die can be moved to and away from said lower die so as to open and close said dies, said open-close mechanism for stopping the first servo motor when a force for clamping said dies reaches a prescribed value, wherein said lower die is held by a slide plate, which is connected to a nut screwed with the screw shaft turned by a second servo motor and which is reciprocally moved, and said slide plate holding said lower die can be reciprocally moved between a clamping position, at which a work piece is clamped between the dies, and a transfer position, at which the work piece or a molded product is transferred, while said dies are opened, by synchronously changing rotational directions of the screw shaft turned by the second servo motor with the open-close action of the movable platen performed by changing rotational directions of the screw shaft turned by the first servo motor.