Elastogran Maschinenbau Gmbh & Co.

Krauss-maffei Aktiengesellschaft

Ivica Grgic

Fritz W Schneider

Wolfgang Sochtig

A method of and apparatus for the measurement of the degree of charging of a liquid synthetic resin component with a gas in which the flushing of the measuring column and the detection of the hydrostatic pressure are effected solely by control of the intake valve to the measuring chamber, a discharge valve at the bottom of an overflow chamber connected to the measuring chamber, and a three position valve connected to the top of the overflow chamber. In one position of this latter valve, a pressurized gas is applied to the overflow chamber to drive overflow liquid component back to the tank: in another position of this valve the column can be equilibrated with atmospheric pressure: in a third position this valve is closed.

Method of and apparatus for measuring the degree of gas charge in a

Method and apparatus for preparing multi-component plastic materials wherein at least one of the components is compounded with admixed solid materials or is highly viscous, the various components are continuously recycled and are metered separately by associated continuously operating feed pumps, and a mixing operation is effected in a mixing chamber served by a control piston. In the circuit for the compounded or viscous component a transmitter device is connected in a position downstream of the respective continuously operating feed pump and upstream of the associated mixing chamber inlet port. This transmitter device operates in a manner similar to a piston pump and increases the delivery pressure of the compounded or viscous component upon discharge into the mixing chamber whereby the operation of the transmitter is operatively coupled to the operation of the control piston at the mixing chamber. The component circuit may furthermore include a filling pump and a check valve.

Method and apparatus for preparing multi-component plastic materials,

A mixing and proportioning apparatus for multi-component plastics materials such as polyurethane comprises a number of tanks, a mixing chamber and a separate pipe connecting each tank to the mixing chamber. The tanks are provided with pressurizing means for causing the components to flow through the pipes and each pipe is provided with a metering mechanism to control the flow of the component through it. The metering mechanisms of the different pipes are all positively coupled to each other so that the rates of flow of the components through the pipes are all kept in constant proportions.

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Munich, Germany

Ivica Grgic