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Unusual Screw Failure

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Topic: Unusual Screw Failure

JohnS
Member

Posts: 1
From:franklin, tn,usa
Registered: Apr 2005

posted April 26, 2005 12:46 PM

I am new to Food Extrusion Equipment and have recently begun a failure review of a "unusual" screw design. The design includes a main shaft(20 L/D)inserted into/thru a glove shaft(splined connection)
fitted with a support flange(fills annular
space between main and glove shaft)and an
external clamp(to rigidize the connection. I know we have some process issues to deal with(feed(soy flour) variability - material and rate), but I believe the mechanical design may be not be adequate. We regularly experience main shaft and glove failure at the support flange/clamp connection. Questions:

1. Has anyone experience with this screw design?
2. Are there screw suppliers dedicated to
food extruders that may be familiar with this design?

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plastics
Senior Member

Posts: 11
From:Bombay,Maharashtra,India
Registered: Apr 2003

posted October 18, 2005 11:02 PM

quote:
Originally posted by JohnS:
I am new to Food Extrusion Equipment and have recently begun a failure review of a "unusual" screw design. The design includes a main shaft(20 L/D)inserted into/thru a glove shaft(splined connection)
fitted with a support flange(fills annular
space between main and glove shaft)and an
external clamp(to rigidize the connection. I know we have some process issues to deal with(feed(soy flour) variability - material and rate), but I believe the mechanical design may be not be adequate. We regularly experience main shaft and glove failure at the support flange/clamp connection. Questions:
1. Has anyone experience with this screw design?
2. Are there screw suppliers dedicated to
food extruders that may be familiar with this design?

Dear John,
please forward us existing screw design that you work with and may be we can suggest some suitable changes or alterations.
regards
vijay boolani
boolani engg corp
Tel:+91-22-24302826/24302790
fax:+91-22-24229875
email:plastics@powersurfer.net

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