References in periodicals archive ?
The melting zone of Bl was a smooth barrel and the polymer in the screw channel directly contacted external heat source conducted from the barrel, so that the polymer melted rapidly at the beginning.
This results in seven workers per shift and a $3.98 labor cost/ton of iron melted.
The presence of relatively modern algae indicates that much or all of West Antarctica must have melted sometime within the past million years, leaving open ocean in its place.
Unlike conventional barrier screws, the ET does not separate the melted and unmelted polymer and does not use shear as the mixing/melting mechanism.
Radioactive contamination of the environment might have been less widespread, and perhaps more manageable, some scientists now believe, if the Ukrainian reactor damaged in an explosion and fire three weeks ago had melted down in the classic China syndrome scenario instead of flinging its contamination primarily into the atmosphere.
The refractory had undergone severe erosion and the silica dry vibratable hot face had melted. The diagram in Fig.
Conversely, a barrel-temperature setting that results in very low torque requirements and still produces melted plastic is too hot.
A 50:50 mix of A356 primary aluminum ingot and recirculating processed scrap is melted in two reverberatory furnaces and are charged directly to the dry hearths, while as-cast scrap wheels are melted in the open charge wells.
Unlike some other dewatering systems, where water is drained in high-pressure areas of the extruder through a slotted barrel, our drain and its position proved less likely to become blocked by solids or partly melted polymer.
When the same charge was melted in a coreless induction furnace, 50% of the lead in the charge was recovered in the iron.
A wedge-shaped tank bottom funnels melted alloy into heated pipes that carry it back to the core-casting machine.
He soon developed a sort of three-legged hypothesis: that metal could be melted in crucibles by heating it by induction with a current of higher than normal frequency, that it could be melted without the use of any transformer iron and, what nobody had seen before, with the use of static condensers to maintain the power factor on the supply at unity."
They also suggested actions that can be taken to capture these advancements in current coreless induction furnace melt shops to improve the quality, productivity and cost of the metal melted. Heine shared his observation that "technical advancements in the foundry and related equipment have improved dramatically, making the foundry smaller, more automated and a much better, safer place to work." Further, he said: "Batch melting with launder transfer to a holder or dual systems with two furnaces appears to be gaining acceptance as the preferred primary melting method."
Initial melting follows the conventional solid-bed mechanism, but at the end of the relatively short transition section where only about half of the resin is melted, it enters the E.T.