Tablet press Dust cups and punch seals
Tablet press Dust cups and punch seals
In tablet press
Dust cups and punch seals are options available to protect the tooling
from damage by abrasive nature of blend during compression cycle fines
are generated which may get up to the upper punch guides via upper punch
seals
Upper punch seals are present inside the punch holes of upper turret
Standard type dust cups
Dust cups , oil cups or bellows are installed below the upper punch tips thereby acting as primary barriers to the product.
Dust cups are of two types Standard and barrel type
Standard dust cups do
not come with holes holes are made manually. Standard dust cups protects
the tablet from lubrication oil , grease as well prevent the blend from
leakage during compression cycle.
Barrel type dust cups
comes with precut holes which can be directly inserted into the upper
punch barrel groove. Barrel type dust cups does not prevent the blend
from leakage as they are installed on barrel but prevents the oil /
grease from reaching the tablet.
Barrel type dust cups
Another technology, comes with the
introduction of bellows these make cushion from the upper punch seals to
the groove thereby preventing the oil or grease to reach the blend as
well as prevent the deposition of fines on the punch barrel.
Images will clearly clarify the difference between standard and barrel type
Punch seals
Most ignored but important part of
tablet press are lower and upper punch seals these seals are made up of
silicon and rupture with time in case of ruptured seals the blend will
pass to the lower punches and reach fill cam these seals are so critical
that some organizations even change them during each changeover.
Punch seals should never be washed with Iso propyl alcohol as it will damage them. However it is most commonly done in most organizations.
Seo wordpress plugin by www.seowizard.org.
Comments
Post a Comment