초록 ▼

A voltage is applied to a feeder plate (29) from a power source section (2) including an alternating power source for dielectric heating, whereby an electric field in a direction crossing a direction in which a mold (8) is moved is applied to an incoming plate (28) which is not in contact with the f

A voltage is applied to a feeder plate (29) from a power source section (2) including an alternating power source for dielectric heating, whereby an electric field in a direction crossing a direction in which a mold (8) is moved is applied to an incoming plate (28) which is not in contact with the feeder plate (29), so that molded object materials (9) are heated and expanded. By doing so, arc discharge caused by contact of the mold with an electrode is prevented from occurring during the heating and molding of a biodegradable molded object by dielectric heating.

대표청구항 ▼

[ We claim:] [1.] A method for manufacturing biodegradable molded objects, comprising the steps of:placing materials having biodegradability in a mold having first and second conductive mold halves and an insulating section therebetween; andapplying across both said mold halves alternating current f

[ We claim:] [1.] A method for manufacturing biodegradable molded objects, comprising the steps of:placing materials having biodegradability in a mold having first and second conductive mold halves and an insulating section therebetween; andapplying across both said mold halves alternating current from an alternating current power source, thus heating and expanding said materials by means of dielectric heating,wherein:said first mold half is provided with a conductive incoming section;a conductive feeder section is provided in parallel with said incoming section, so as to be not in contact with said incoming section; andin said alternating current applying step, said materials are heated and expanded by means of the dielectric heating, by moving said mold containing said materials in a predetermined direction, and by applying the alternating current from the alternating current power source through said feeder section and said incoming section by applying an electric field in a direction crossing the direction of the movement of said mold.