Core centered mold for hollow stackable plastic products
OwnerJens O. Sorenseninventor
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Abstract
A mold which comprises a number of circumferential throttles, at least partly located on the sides of the cavity and core parts respectively. The throttle distance is significantly shorter than the adjacent wall thickness, the pitch between throttles is such that stacking of the molded product is possible. The mold may comprise a number of feed channels leading from one throttle to the next throttle. The mold differs among other factors from the prior art by its short throttle distance, by its flow channels, by the throttles being located on the sides of the products, and the number of throttles being more than one. The throttles improve the rigidity of the molded thin-walled hollow product. When the molded product is a hand-held venting cup the throttles prevent buring of the fingers.
Claims8
A mold for injection molding of thin-walled, hollow, stackable plastic products, comprising a core part and a cavity part, where the relative reciprocal wall thickness of the molded product may be equalized by centering the core part in the cavity part during injection;
- the core part and the cavity part each having an axially extending circumferential recess in a circumferential shoulder, each said recess limiting an axially extending annular projection, corresponding such projections located on the sides of the core part and the cavity part respectively in combination defining a core-centering circumferential throttle.
Dependencies are inferred from the claim text.