DEGASSING DEVICE AND METHOD OF BACK-FILLING MATERIAL FOR SPRAY FORMED METAL TOOLS

摘要

An apparatus and a method for degassing of back-filling materials for spray formed metal tools are provided to reduce time required for performing a degassing operation and improve compressive strength of the spray formed metal tools by proceeding mixing of the back-filling materials and mixing of a hardening material in a vacuum atmosphere. An apparatus(100) for degassing of back-filling materials(150) for spray formed metal tools comprises: an agitating impeller(110) for agitating back-filling materials or a mixture of the back-filling materials and hardening materials; a vacuum chamber(130) having the agitating impeller mounted on a top part thereof; and a vacuum pump(140) connected to one side of the vacuum chamber. The apparatus further comprises a vessel(120) which is positioned within the vacuum chamber, and in which the back-filling materials are contained. A method for degassing of back-filling materials for spray formed metal tools comprises the steps of: (a) preparing a jig for back-filling a thermal spray coating layer; (b) mixing the back-filling materials under the vacuum atmosphere; (c) injecting hardening materials into the back-filling materials mixed in the step(b); (d) agitating the back-filling materials with the hardening materials under the vacuum atmosphere; and (e) injecting the back-filling materials mixed with the hardening materials into a backside of the thermal spray coating layer fixed by the jig.