Auger pump

The powder is supplied to the gun by a powder pump at a uniform and consisfent rate. There are two types of powder pumps ejector type, using the venturi principle, and auger pumps, which use positive displacement. A corona charging system is most widely used to electrostatically charge the powder. The electrostatic spray gun has several functions ... 

Auger pumps and piston pumps are also commonly used in needle dispensing. Examples are shown in Figures 10-2 and 10-3. 

Dams usuaiiy dispensed with auger pump. Good bead width controi. 

Auger pumps are good for dam dispense because of bead control... 

Good for fill because of higher speed and better accuracy than auger pumps... 

Good resistance to abrasion compared with auger pumps Part preheating to 80-110°C is often assists the dispense process Needle heating... 

Auger pumps offer both higher flow rates and better accuracy than time-pressure, with a typical tolerance of 2%... 

The white cast irons and their low alloys have good abrasion resistance properties [2,3]. White cast irons are used for grinding balls, segments for mill liners and slurry pumps. In the ceramic industry they are used for muller tyres and augers in the pulp and paper industry for attrition mill plates and chip feeders and in the paint industry for balls for grinding pigments. 

The apparatuses used for the studies of both ammonia synthesis emd hydrodesulfurization were almost identical, consisting of a UHV chamber pumped by both ion and oil diffusion pumps to base pressures of 1 x10 " Torr. Each chamber was equipped with Low Energy Electron Diffraction optics used to determine the orientation of the surfaces and to ascertain that the surfaces were indeed well-ordered. The LEED optics doubled as retarding field analyzers used for Auger Electron Spectroscopy. In addition, each chamber was equipped with a UTI 100C quadrupole mass spectrometer used for analysis of background gases and for Thermal Desorption Spectroscopy studies. 

The collection of equipment blank data is unavoidable for the types of equipment that require decontamination prior to each use (for example, non-disposable bailers, non-dedicated submersible pumps, augers, split spoons). However, the number... 

---