Patent ID: 6824375
Filing Date: 2004-11-30
Classification: B29C

Abstract:
Arrangement for a consecutive two-stage ejector of the built-in type for moulding tools comprising pairs of moving ejector plates and an actuating device for causing the ejector plates to be moved to intended positions, comprisingrear ejector plates attached to, and are capable of actuation by, a reciprocating rod that is connected to the tool, a central pin extending between the fixed plate of the moulding tool and a body of the moulding tool, the central pin exhibits an annular groove, a plurality of adjustment screws, said adjustment screws comprising a first screw attached to a front ejector plate and a second screw adapted to accommodate the first screw and extending through an apperature in the rear ejector plate, pairs of sleeves are accommodated by the central pin with one sleeve passed onto the other sleeve, each of the two sleeves is attached to its own moving ejector plate, an inner sleeve exhibits transcurrent recesses corresponding to the desired number of locking segments, an outer sleeve exhibits a stop part capable of actuating the locking segment, the locking segments exhibit stop parts capable of interacting with the groove, the two ejector plates are attached to one another via an attachment which permits free packing together of the pairs of ejector plates, which are retracted to a specified distance from one another, when the rear pair of plates is caused respectively to be extended and retracted, in conjunction with which the ejector of the tool is so arranged in an initial phase as to actuate the rear ejector plates and so that the front ejector plates are conveyed along through the interconnection of the two sleeves with the help of the locking segments, and in that, after actuation of the locking segments and their accommodation in the annular groove, the front ejector plates are released and the rear ejector plates are so arranged as to be actuated singly by the ejector causing them to be extended to the intended end position a connection between the two pairs of plates is formed by a rod attached to the front pair of plates which exhibits a stop at its opposing end, and a connection is so arranged as to be adjustable for length and is formed by an internally threaded sleeve and a threaded pin attached thereto, together with a thickened head arranged at the free end of the sleeve which exhibits a means of attachment for a spanner, wherein the distance between the rear ejector plate and the front ejector plate can be adjusted by screwing the two adjustment screws relative to one another in the desired direction.