UN PIANO AD ALVEOLI, DI UNA COMPOSI PROCEDIMENTO DI CONDIZIONATURA, IN ZIONE ADESIVA PERMANENTE, ATTREZZATURA PER LA MESSA IN OPERA E CONDIZIONATURA OTTENUTA DA QUESTA

摘要

An open-topped casting mold and a mating cover are electrostatically coated with a powder screen and casting material is poured into the mold without disturbing the powder by holding the powder in position with static electricity. The casting material is permitted to harden and a screen of powdery or fatty material placed on the upper surface of the hardened material and protective film applied over the screen.