Core and
mold wash and physical mold packing were eliminated, cutting full shift man hours for both processes, plus wash drying time.
*
Mold wash penetration is on the order of 0.100-0.125 in.
(Normally, the temperature of the
mold wash in ambient conditions will be upwards of 20F [10C], colder than ambient as a result of evaporative cooling.)
Mold, core,
mold wash and even sleeve permeability must be considered when assessing the exposure of the liquid metal inside the riser sleeve to the atmospheric air.
It also includes two
mold wash systems, drying ovens, core setting, two automatic mold closing systems, a mold pouring and cooling system, two shakeouts and a 30 ton/hr.
Mold preparation, such as applying
mold wash, venting, setting chaplets and cores, and actual closing of the mold are completed on the finish line with less effort.
Then, the mold surface can be treated using
mold wash or other traditional foundry techniques to improve surface finish.
The mold halves pass through an infrared drying oven, which ensures curing of the bonded sand and heats the
mold wash surface to prevent the water-based wash from penetrating too deeply.
ITW/BCK electric infrared/forced-air
mold wash dryers are designed for rapid drying of water-based refractory coatings on sand molds.
The appearance issue was handled by mold temperature, injection pressure and control of
mold wash.
Changes in
mold wash, binders, or even the way the parts are molded can impact cleaning times.
Mold wash - a good thick layer of
mold wash is critical.