Flow tester for thermoplastic, and strand cutting method

Details Flow tester for thermoplastic, and strand cutting method Flow tester for thermoplastic, and strand cutting method

1991-11-27

1993-11-09

Noland, Tom

Measuring and testing

Liquid analysis or analysis of the suspension of solids in a...

Viscosity

G01N 1104

Patent

active

052592383

ABSTRACT:
According to the present invention, there is provided a flow tester for thermoplastic which uses an extrusion type plastometer including a vertically supported cylinder, a piston on which a weight is mounted at an upper portion thereof and which is inserted in the cylinder, a die mounted on a lower end of the cylinder, and a heater provided to surround the cylinder, characterized in that a sample of a thermoplastic is filled in the cylinder and is heated by the heater to melt, the molten sample is extruded from the die by the piston, a strand as an extruded material is cut, and a mass thereof is obtained, thereby testing a flow characteristic of the thermoplastic, characterized by including a strand bottle which has a cutting edge for cutting the strand and which catches the strand cut by the cutting edge, a strand bottle stocker for storing the strand bottle before and after use, a weight measuring unit for measuring a weight of the cut strand together with the strand bottle, a strand cutting unit for moving the strand bottle so that the cutting edge of the strand bottle travels along a lower end face of the die to perform cutting, and a strand bottle convey unit for transferring and conveying the strand bottle among the strand bottle stocker, the weight measuring unit, and the strand cutting unit.

REFERENCES:
patent: 2780096 (1957-02-01), Noble et al.
patent: 4229970 (1980-10-01), Barker et al.
patent: 4449395 (1984-05-01), Kurtz et al.
patent: 4587837 (1986-05-01), Newbould
patent: 4882930 (1989-11-01), Nagy et al.

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