Definition: as
for the contact and collision between main channel, high temperature material and
nozzle, main channel is usually designed
to be replaceable bushing, hereinafter referred to sprue bushing.
(1) Main role:
A. Make mould install into hole easier and better fit injection machine nozzle hole. and can withstand the back pressure of material in case of push off from mould.
A. Make mould install into hole easier and better fit injection machine nozzle hole. and can withstand the back pressure of material in case of push off from mould.
B.
As main channel of the gating system, sprue bushing transits material from cylinder into mould
cavity smoothly. During metal injection molding process, material is unallowed overflow. At the same time sprue bushing ensures main
channel setting out conveniently.
( 2) Structure
Integral type: shoulder and main channel parts are integrated
Split type: shoulder and main channel parts are made separately
Japanese industrial standard: JIS
Chinese industry standard: SJB
Integral type: shoulder and main channel parts are integrated
Split type: shoulder and main channel parts are made separately
Japanese industrial standard: JIS
Chinese industry standard: SJB
Original
article link：http://www.zcmim.com/article/metal-injection-molding-proces-mimci_1.html
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