Needle-valve for hot runner injection moulding

Details Needle-valve for hot runner injection moulding Needle-valve for hot runner injection moulding

1976-10-05

1978-05-09

Blunk, Evon C.

Fluid sprinkling, spraying, and diffusing

Fluid pressure responsive discharge modifier* or flow...

Fuel injector or burner

2395336, 239584, 425562, B05B 130

Patent

active

040882713

ABSTRACT:
Needle-valves to be inserted in a hot runner panel of an injection moulding machine for the distribution of the molten material to a plurality of dies fastened to the front of a hot runner panel and which are opened by the pressure of the molten material and closed by a spring by the releasing of the pressure. The construction of the valves being so that they as a unity may be easily inserted, removed and adjusted from the backside of the hot runner panel without disassembling the dies from the moulding machine. Further the valve is provided with an adjustable abutment in an enclosed space which will not be contaminated by the molten material to ensure exact position of the needle in its open and closed position.

REFERENCES:
patent: 3023458 (1962-03-01), Seymour
patent: 3398936 (1968-08-01), Delano
patent: 3434667 (1969-03-01), Chmura
patent: 3469793 (1969-09-01), Guertler
patent: 3491408 (1970-01-01), Natkins

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