DE2426044

A size control device for use in an extrusion molding machine, comprising an opto-electric position sensor for measuring the cross-sectional size of an extruded material and producing an electric signal representative of the measured cross sectional size of the extruded material. Circuitry is arrang...

Full description

Saved in:
Bibliographic Details
Main Author YAGI, EIGO
Format Patent
LanguageEnglish
Published 07.12.1978
Subjects
AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
MEASURING
MEASURING ANGLES
MEASURING AREAS
MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
MEASURING LENGTH, THICKNESS OR SIMILAR LINEARDIMENSIONS
PERFORMING OPERATIONS
PHYSICS
SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR
SHAPING OR JOINING OF PLASTICS
TESTING
TRANSPORTING
WORKING OF PLASTICS
WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Online AccessGet full text

Cover

More Information
Summary:A size control device for use in an extrusion molding machine, comprising an opto-electric position sensor for measuring the cross-sectional size of an extruded material and producing an electric signal representative of the measured cross sectional size of the extruded material. Circuitry is arranged to increase or decrease the draw-off rate of the extruded material through detection of an amount of deviation of the cross-sectional size of the extruded material from a prescribed normal size. The opto-electric position sensor is characterized by a light-emitting unit adapted to project a collimated beam of parallel rays of light and a light-sensitive unit for receiving the beam of light. The light-sensitive unit is formed with a pinholed camera obscura so that, if an object such as the extruded material is positioned between the two units and intercepts the beam of light, an inverted image faithfully following the contour of the object is produced in the pinholed camera obscura.
Bibliography:Application Number: DE19742426044