The proper use of vacuum degassing and/or pressurizing can make the difference between a mediocre casting and a perfect casting. Some materials, by their chemistry, are either very thick or contain a lot of surface tension and therefore entrap air very easily, creating unwanted bubbles in the molds or parts. Here you see our FreemanRead More
Author: calore.yang@hotmail.com
APPENDIX A:REMOVAL OF AIR FROM LIQUIDS
1.1 APPLICATIONS . RTV Silicone Rubber . Araldite . Polyester Resin . Plastasols . Casting Plaster . Polysulphide Rubber . Polyurethane Resin . Adhesive Mixes . Epoxy Resins . Investment Plaster 1.2 INTRODUCTION When any of the above listed materials are mixed with the required additives, accelerator, fi ller etc., then air bubbles can becomeRead More
RECOMMENDED PROCEDURES of VACUUM PUMP OIL CHANGES
The Vacuum Degasser is the most critical maintenance item in a degassing system. For oil sealed rotary vane vacuum pumps the most critical maintenance item is to change the pump oil frequently. The frequency will depend on the application and usage but it is recommend that if the oil ever turns cloudy, dark or isRead More