structural foam succeeds in eliminating swirl and still maintains low stress through internal foaming but at the cost of a thicker wall of structural foam, and therefore higher weight.
TCW Equipment and Systems of Saint Helena, CA, produces a four-spout counterpressure
filler, fitted with two banks of two filler spouts and a two-station crowner.
The final result was a structural foam polyester, molded with counterpressure
, that worked very well.
Three of these approaches are well known: gas counterpressure
, a movable core or cavity that withdraws after filling to allow foaming, and a textured mold surface to hide swirls or bubbles.
Comfort measures for labor; bring out "bag of tricks," and let them practice with one another with positioning, birth ball, massage, counterpressure
The ability to mold thinner walls without sink marks on large parts, such as with gas-assist; use of counterpressure
to produce housings without secondary painting, with custom-colored pellets; and using two different materials, each with its own advantages, as in coinjection, are all part of today's greater mix.
The processor opted for a counterpressure
floating platen instead of a typical mechanical-lock type.
There are many suggestions for alleviating persistent back pain: slow dancing together with the partner providing counterpressure
Featuring 242 plastic parts, the unit utilizes low pressure structural foam, gas counterpressure
, thin-wall structural foam, and injection molding.
Another smooth-skin process that arrived in the 1970s was gas counterpressure
molding, in which the mold is pressurized with gas before injection.
A further development of the conventional structural foam molding process is the gas counterpressure
process, which was developed in the early 1970s.
A gas counterpressure
control module for structural-foam or standard injection molding, introduced in 2001 by the consulting firm Caropreso Associates, Becket, Mass.