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on on the part (see "N" reference in Figure the part (see "N" reference in Figure
6). This shaft stroke also can affect the ). 6). This shaft stroke also can affect the This shaft stroke also can affect the
filling pattern of the cavity. The thinner lling filling pattern of the cavity. The thinner pattern of the cavity. The thinner
the plastic part, the shorter the stroke he the plastic part, the shorter the stroke plastic part, the shorter the stroke
should be. Part thickness and aesthetic hould should be. Part thickness and aesthetic be. Part thickness and aesthetic
requirements also determine the neces- equirements requirements also determine the neces- also determine the neces-
sary overall valve size. ary sary overall valve size. overall valve size.
FIGURE 6
An outer sleeve, a sliding shaft and a central pin make up a dynamic venting valve system.
CONTRIBUTOR
Damiano Balzi is managing director with Ermanno
Balzi S.r.l.
FOR MORE INFORMATION
Ermanno Balzi S.r.l
damiano.balzi@ermannobalzi.com
ermannobalzi.com
CB Mould Services Inc.
colin@cbmouldservices.ca
cbmouldservices.ca
VIDEO:
Venting in Action
short.moldmakingtechnology.com/
ventaction