Nozzle shut-off valve

Details Nozzle shut-off valve Nozzle shut-off valve

1977-11-11

1979-02-20

Scherbel, David A.

Dispensing

Outlet element operated by pressure of contents

Reciprocable, nonpivoted

222504, 222545, 251 31, 425225, 425562, B29F 103

Patent

active

041402383

ABSTRACT:
A nozzle shut-off valve for injection molding machine for plastic material, especially thermoplastic material, has two pneumatic cylinder-and-plunger units. One such unit has its plunger mounted to reciprocate so as to block the passageway of the plastics through the nozzle. The first such plunger and cylinder unit is provided with a pilot passage in the valve nozzle so that the pressure of molten plastic can be used to open it. The second such unit is much smaller diameter and has its plunger mounted to block the pilot passage so that the second unit in effect becomes a pilot valve and controls the application of fluid pressure through the pilot passage to the first unit plunger or blocking plunger.

REFERENCES:
patent: 2781025 (1957-02-01), Loevy, Jr.
patent: 3500501 (1970-03-01), Johansson
patent: 3746486 (1973-07-01), Koster

Affiliated with

Also associated with

Rating

Nozzle shut-off valve does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Nozzle shut-off valve, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Nozzle shut-off valve will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-254635