For me, the answer--volume--comes from studying cavity-pressure curves and witnessing the wear on parting lines
along with the resulting development of flash on parts.
Venting through the parting line
is normal until the polymer begins to soften and cover the inside of the parting line
The all around this side of parting line
symbol is view dependent and applies to a shape seen in its true profile on one side of a parting line
"With molds becoming more complex and being exposed to high pressures, it is a superior tool to bluing agents, which moldmakers traditionally use," says John Bozzelli, owner of Injection Molding Solutions, who uses Pressurex to demonstrate good or bad parting line
mating, and open or closed vents in his consulting and training services."
* A maximum height of the part, from the parting line
, that remains 3"--a part can be up to 6" high if the parting line
can pass through the middle of the part, both inside and out.
For a short shot with flash, 95% of time you have a weak parting line
The main culprit to a quick and easy design: the casting's parting line
"It is placed between platens on the parting line
, which are then subjected to pressure upon clamp closing using minimal clamp tonnage.
Mold & Engineering offers silicone vacuum seals in two sizes for parting line
sealing of silicone and rubber molds.
Other mold enhancements include better parting line
gap checking with auto-zoom and wire frame-supported parting line
They are manufactured with a highly polished barb and molded without a parting line
to ensure a leak-proof seal.
The parting line
finish allows passage of air without producing flash.