| 摘要 |
The invention relates to a plastic metering system in a device for producing plastic articles, comprising a metering unit ( 1 ) forming a block ( 2 ) comprising a material feed duct ( 10 ), a metering cavity ( 4 ) which may communicate with the said material feed duct ( 10 ), a material outlet orifice ( 5 ) placed on a wall of the said metering cavity ( 4 ), and a valve ( 3 ) in the form of a cylindrical rod designed to slide through and close off the said material outlet orifice ( 5 ), characterized in that the metering unit ( 1 ) furthermore includes a piston ( 7 ) mounted so as to slide coaxially around the valve ( 3 ) so as to allow the volume of the metering cavity ( 4 ) to be varied and the material feed duct ( 10 ) to be momentarily closed off. The invention also relates to a method for using the said system.
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