Nozzle for multicavity moulds for manufacturing medical plastic parts with special shapes
Available from Thermoplay S.p.A.Product Details
In injection molding applications of special shaped parts having long lengths proportionally to the diameter, it is difficult to avoid movements of the mould core, which determine consequent wall thickness differences.
The core can move sideways in consequence of a non homogeneous filling, which creates a radial strength even if the geometry of the molding part allows to have an injection point coinciding with its symmetry axis.
To position the injection points near the tube open side, determines lower movements of the core.
The new nozzle developed by Thermoplay, allow to eliminate the traditional “tunnel” sprues, normally used in these applications.
As it appears in the picture, injection is direct in the annular cavity wall. The nozzle structure allows easy machining of the injection system housing, in the mould. In addition the nozzle is provided with double plastic sealing ring. The thermal profile of the nozzle body and the tip insulation from the forming matrix, allow to use process parameters aligned with the ones suggested by the plastic material manufacturers.
Finally, the extraction operation allows to have an injection point very small and free from imperfections, thanks to the lateral injection.
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