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模具-浇口
Chapter 7
MOLD DESIGN continued
Sprue Bushing Figure 7-18 parting line. Though they can be cut
directly into the mold, sprue bushings
0.5-in or 0.75-in Spherical Radius are usually purchased as off-the-shelf
Locating Ring
items and inserted into the mold (see
0.5-in/ft
Taper figure 7-18). The head end of the sprue
bushing comes premachined with a
spherical recess — typically 0.5- or
Nozzle Tip 0.75-inch radius — to receive and seal
0.02 – 0.08-in
Radius off against the rounded tip of the press
injection nozzle. The sprue bushing
flow-channel diameter typically tapers
larger toward the parting line at a rate of
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