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Explanation: after core and mould production the coating can be applied by dipping , flooding , and spraying.If it is waterbased ie.materials such as Al silicates,Zircon are suspended in water with suitable additives .The coating has to be dried as residual water in contact with molten metals develops huge amounts of steam leading to casting defects.Coatings provide better surface finishes than sand surfaces only , thereby reducing fettling costs.
Solvent (often isopropanol,hence Alcoholschlichten)based coatings made with the same refractory minerals dry faster and are often burned off to reduce emissions.They are more expensive to produce.
Wolf Brosius Local time: 01:36 Native speaker of: German, English PRO pts in pair: 607
Explanation: I’ve hidden my first answer- It was carelessly written.
Harry and Wolf’s answers are both more than adequate.
I would only add that the general and most traditional term used is “core wash”- in this case water-based.
In foundry core work, the surface quality is everything. In this case dipping in water-based “wash” inhibits pre-ignition of the sand binder at the surface which would otherwise cause (through rapid release of gases) surface defects when the molten metal is poured and makes contact with the core.
The wash also helps bind the “crumbiness” of the core surface.
Coating, dressing, sizing (nothing to do with measuring) are general terms for applying the wash- facing is more refined work when the “wash” is used more thickly as a “Spachtelmass”.
Founders black, is a very old term from the days when a mix of graphite and water with other liquids was used- filthy stuff. Still is used today, but the mixes are more sophisticated.
Die lubricant is just what it says- e.g. to lubricate steel dies used in aluminium casting.
Release agent is sprayed on the core making dies to prevent the resin sand binder “gluing the core to the surface of the moulds (dies).