Method of Evaluating Grease amd Extrusion Die for the Method
OwnerRichard N. Wurzbach, Andreas Retzlaffinventors
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Abstract
A method of measuring a characteristic property of grease includes pushing a constant volumetric flow of grease through an extrusion die and measuring the force needed to extrude the grease from the die. The die includes a flow restriction that increases the force required to flow the grease.
Claims15
An extrusion die for extruding a uniform flow of new or used grease, the extrusion die comprising:
- an inlet opening to receive the grease, a discharge opening to discharge the extruded grease, and a flow channel fluidly connecting the inlet opening and the discharge opening to flow grease in a downstream direction through the flow channel from the inlet opening to the discharge opening, the discharge opening having a shape defining the cross-section shape of the grease extruded from the die;
- and
- a flow restriction in the flow channel, and a baffle in the flow restriction, the baffle extending at an acute angle with respect to the direction of flow through the flow restriction.
A method of measuring a characteristic property of grease by measuring the force needed to flow an amount of grease through a flow channel, the flow channel having an intake opening and a discharge opening, the discharge opening defining the cross-sectional area of the grease discharged from the flow channel, the method comprising the steps of:
- (a) pushing a constant volumetric flow of grease into the inlet opening and flowing grease through the flow channel under the impetus of the grease being pushed into the opening;
- and
- (b) measuring the force needed to maintain the constant volumetric flow of grease into the flow channel as a function of time while grease is being discharged from the discharge opening.
Dependencies are inferred from the claim text.