Vacuum molding process
OwnerTheodore O. Mandishinventor
Life of this patent
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Abstract
A vacuum molding process includes selecting a flexible polymer cover for covering a selected cement container and at least partially filling the container with a cement mixture. The polymer cover is removably attached to the partially filled cement container and a vacuum is applied to the cement mixture in the container. The process may also include connecting a vibrator to the container for simultaneously vibrating the container and the placing of a hollow mold core member having a plurality of apertures therein in the middle of the container for the gas bubbles to escape as a result of the vibration of the cement mixture in a vacuum.
Claims6
A vacuum molding process comprising the steps of:
- selecting a cement mixer drum having an open portion;
- selecting a flexible polymer cover sized to at least cover said open portion in said selected cement mixer drum, said selected polymer cover having a vacuum hose coupling attached thereto and a vacuum hose removably attached to said vacuum hose coupling and a vacuum pump connected to said vacuum hose for drawing a vacuum therein;
- at least partially filling said cement mixer drum with an uncured cement and water mixture;
- removably attaching said selected polymer cover to said cement mixer drum open portion;
- actuating said vacuum pump to place a vacuum on said cement and water mixture to thereby remove gases therefrom;
- actuating said vibrator to vibrate said selected cement mixer drum whereby a cement mixer drum can have a vacuum and vibration placed thereon to remove gases from said cement and water mixture.
Dependencies are inferred from the claim text.