PURPOSE: To easily manufacture a corner formwork for placing concrete in accurate dimension by extrusion molding resin plastic material consisting of polyolefine series resin and inorganic filler by the use of a sizing die.
CONSTITUTION: Polyolefine series resine such as polypropylene resin of bending elastic modulus for example over 2000kg/cm2 is prepared. Further inorganic filler such as metal, metallic oxide, metallic carbonate, conductive powder, ceramics, carbon fiber, carbon black, glass fiber, glass bend, glass balloon, mica, or potassium titanate is prepared. Resin plastic material constituted by mixing the polyolfine series resin 10-90weight% and the inorganic filer 90-10weight% is extrusively molded by the use of a sizing die, so as to form a corner formwork 1 having voids 2.
MATONO TOSHIAKI
YASUKAWA YASUO
ISHITOBI HIROYUKI
Next Patent: FORMWORK DEVICE FOR JUMPING FORMWORK CONSTRUCTION METHOD