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US 4,009,978 AGranted
Molding system with automatic fluid treatment of mold cavity
AssigneeHanning-Elektro-Werke Robert Hanning
InventorMichael Hanning
Life of this patent
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Abstract
Two mold halves together form a mold cavity and one of the mold halves is fitted with a plurality of ejector rods that can be reciprocated so as to push a molded article out of that half. At least some of these ejector rods are formed with throughgoing passages terminating adjacent the inner ends thereof at nozzle openings. Air and a treatment fluid, such as a demolding liquid, can be injected into the mold interior through these rods, the nozzle openings in the ends of the rods being covered during the normal molding operation.
Claims4
A molding apparatus comprising:
- a first mold half;
- a second mold half forming with said first half a mold cavity and formed with a bore between said cavity and the exterior;
- means operatively connected to said first mold half for moving same toward and away from said second mold half to open and close said cavity;
- an elongated ejector element in said bore having an inner end displaceable into said cavity and an outer end lying outside said mold halves, said element being formed with a passage extending between said ends;
- means operatively connected to said element and shiftable relative to said second mold half for displacing said element between a first position with said inner end within said cavity to eject a molded article from said cavity and a second position with said inner end generally flush with an inner surface of said cavity;
- and
- means including a source of mold-wall treating release liquid connected to said passage at said outer end for injecting a portion of said liquid into said cavity in said first position of said element, said ejector element being formed with means for training a spray of the liquid from said
4 more elements
Dependencies are inferred from the claim text.