SMALL-SIZE ARTICLES FORWARD HOT EXTRUSION METHOD

摘要

FIELD: forward hot extrusion processes and equipment, possibly manufacture of high-frequency dielectric matching transformers. ^ SUBSTANCE: invention provides detailed process for preparation stage and making stage of high-frequency dielectric transformer used for matching frequency characteristics of wave guide with dielectric irradiator. Method comprises steps of preliminary emulsion copolymerization of styrene with nitrile of acrylic acid and alpha-methyl styrene by successively mixing components; cooling prepared pellets and depositing them in the form of tablets and(or) powdered mixture of styrene + alpha-methyl styrene; discretely feeding prepared mixture in the form of powder and(or) tablets to hopper of molding equipment; producing plasticized melt mixture with density 2 -2,2 g/cm2 in the form of discrete-mass batch of powder and(or) tablet; heating mixture in hopper till 190°C for 19 - 20 min; injecting melt mixture to press-mold under specific injection pressure 10.8 - 12.8 MPa; selecting mode parameters and keeping them for strictly normalized technological period. It provides maximally safe conditions for making pellets of styrene and alpha-methyl styrene. Further treatment of pellets together with desired components allows realize important physical and chemical parameters of articles of radio navigation and frequency-controlling receiving-transmitting systems. ^ EFFECT: possibility for producing articles with high dielectric permeability and small dielectric losses used for realizing functions of high-frequency transformer for matching frequency characteristics of wave guide with dielectric irradiator. ^ 1 ex