Device for ejection of moulded pieces from a moulding tool
AssigneeAdval Tech Holding AG
InventorsRudolf Lüthi, Daniel Meier
Life of this patent
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Abstract
The invention relates to a so-called spring cushion (5), for the ejection of moulded pieces (4) from a moulding tool (3), with a plunger (6), moving in a guide tube (9) within the moulding tool and loaded in the ejection direction (14) by means of a spring (15). According to the invention, the spring (15) is embodied as a draw spring, in particular as a spiral draw spring. Considerably longer service life can be achieved as draw springs do not have radial deflections on loading.
Claims3
A device for ejecting formed parts from a forming die having a plunger movably guided in the forming die in a guide tube and loaded in the ejection direction by a spring wherein, the spring is a tension spring, and
- wherein the tension spring is a helical spring, wherein the guide tube and the plunger are arranged essentially inside this helical spring.
Dependencies are inferred from the claim text.