Measuring and testing – Hardness – By penetrator or indentor
Patent
1989-04-10
1990-09-18
Raevis, Robert
Measuring and testing
Hardness
By penetrator or indentor
G01N 348
Patent
active
049569945
ABSTRACT:
A plunger of a known mass is held in a guide sleeve of a test device at a predetermined height over the sample of settable plastic material being tested. The plunger is gently released onto the sample without impact to apply a static force thereon similar to a "handgrip" pressure applied on a molded part during handling. The static pressure is applied on the sample released at selected times and places after reactive components of the sample are mixed for reaction to effect a series of indentations on the sample whose depths are measured and plotted as points on a depth versus time graph to define a cure curve of the sample. Curing rate is determined from the initial slope of the curve. Cure completion is determined where the curve levels off. A measure of the likelihood of handling damage is established by the portion of the indentations after a given time period.
REFERENCES:
patent: 490860 (1893-01-01), Snoeck
patent: 1232782 (1917-07-01), Field
patent: 2509692 (1950-05-01), Miller
patent: 2650435 (1953-09-01), Kidd
patent: 2791903 (1957-05-01), Lundstedt
patent: 2975631 (1961-03-01), Hansen
patent: 3078710 (1963-02-01), Palmer
patent: 3421364 (1969-01-01), Moneypenny et al.
patent: 4565089 (1986-01-01), Arciszewski et al.
Davidson Textron Inc.
Evans John C.
Raevis Robert
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