Dispensing – Plural sources – compartment – containers and/or spaced jacket – With discharge assistant for each source
Patent
1988-04-14
1989-09-12
Kashnikow, Andres
Dispensing
Plural sources, compartment, containers and/or spaced jacket
With discharge assistant for each source
222 55, 222255, 222275, 222278, 222280, 222334, 222380, B67D 552
Patent
active
048652261
ABSTRACT:
A method and apparatus for metering and mixing multi-component plastics, in particular polyurethane, in which two or more hydraulic piston and cylinder units (A.sub.1 and A.sub.2) for each component, operate periodically by a balanced procedure. The pressure for the second piston and cylinder unit which takes over metering is equilibrated, before the beginning of the metering procedure, with the pressure of the first piston and cylinder unit which is in the process of metering. Switching from one piston and cylinder unit to the other (e.g. from A.sub.1 to A.sub.2) takes place in such a way that metering is taken over by the second piston and cylinder units at the same time as the first piston and cylinder unit is switched off. This is achieved by providing a pilot valve which has zero overlap and inevitably releases the component stream from the first piston and cylinder unit at the same time as the other piston and cylinder unit is switched off. Pressurization and pressure equilibration are effected by a hydraulic control apparatus which is incorporated in the hydraulic loop of the volume stream and automatically equilibrates the initial pressure with the metering pressure. This permits pressurization and pressure equilibration without additional parts in the component system.
REFERENCES:
patent: 711144 (1902-10-01), Wright
patent: 1569300 (1926-01-01), Purvis
patent: 4116364 (1978-09-01), Culbertson et al.
patent: 4195752 (1980-04-01), Heimgartner et al.
patent: 4616978 (1986-10-01), Matheson et al.
Becker Gunther
Lisker Norbert
Reisinger Gerhard
Taubenmann Peter
Elastogran Polyurethane GmbH
Kashnikow Andres
Le Mark T.
LandOfFree
Metering and mixing of multi-component plastics does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Metering and mixing of multi-component plastics, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Metering and mixing of multi-component plastics will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-910086