These polymers may be processed by injection molding, extrusion, compression molding, rotational casting
or blow molding.
Xtend 19CMS can be employed for a variety of processes, including rotational casting
, compression molding, resin transfer molding, as well as open molding of non-gel-coated or primer gel-coated parts.
In #6,673,288, Dargavell and Evans for Intertec Systems designed a multi-element moving vacuum chamber for rotational casting
, including a mold with an axis of rotation and a box containing molding powder.
For example, according to Gianluigi Mengoli, director of R&D, there is a rotational casting
process used in order to get an additional cooling fin for the head.
As can be seen from figures 1 and 2, the processing advantages of the rotational casting roll covering system are extremely significant versus the conventional roll covering system.
When used with conventional rotational casting materials, the additional mixing head allows for an even shorter start-to-finish time.
Reviewing the overall rotational casting process as shown in figure 2 , the following details help to provide an understanding of the system:
Rotational casting requires formulations with very short gel times of about 3-6 seconds.
Some of the advantages of rotational casting of roller covers include: