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NONRETURN VALVE FOR THE SCREW OF A PLASTICISING UNIT OF AN INJECTION-MOULDING MACHINE
NONRETURN VALVE FOR THE SCREW OF A PLASTICISING UNIT OF AN INJECTION-MOULDING MACHINE
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机译:用于注塑机的可加工单元的螺钉的非晶阀
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摘要
A nonreturn valve includes two half-shells, arranged in a portion of the screw with a reduced screw diameter. One or more channels for the melt to flow through from the screw into the space in front of the screw is/are provided in each of the half-shells, the channels lie substantially parallel to the longitudinal axis of the nonreturn valve or of the screw. In each of the channels are a ball and, following the ball in the direction of flow of the melt, a pin arranged substantially transversely to the direction of flow of the melt. In the direction of flow of the melt, the channels have a first channel portion, with a channel diameter less than the diameter of the ball, and a second channel portion, with a channel diameter greater than the diameter of the ball, the ball and the pin are arranged in the second channel portion.
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