No registration or passwords; no pop-up ads -- just aloha, fun, & answers.
(as an eBay Partner & Amazon Affiliate earns from qualifying purchases).
Home /
T.O.C.
Fun
FAQs
Good
Books
Ref.
Libr.
Advertise
 
Help
Wanted
Current
Q&A's
Site 🔍
Search
pub  Where the
world gathers for metal finishing
Q&As since 1989



-----

Barrel plating of flat parts




Q. Hello:

We have a flat part that we are attempting to run in our barrel zinc line. We are having great difficulty in keeping the parts from sticking together. Do they make any type of insert or auger to break those parts apart as they tumble in our barrels? Suggestions will be greatly appreciated.

John Doyle
PM Industries - Springdale, Arkansas
2005



A. Without further information i.e. part size, barrel size,type of barrel, type of electrolyte, etc., answers can not be too specific. I will just give you some of the old "tried and true" (or possibly just old plater's myths) methods for overcoming "nesting".
1. Hang a chain between the danglers to break up the mass
2. Mix the load with other parts or shot or "dog bones" to encourage tumbling and less nesting
3. Wedge plastic rod (or even broom sticks) in an X configuration inside the barrel to knock parts apart during rotation.
4. Reduce load size, use a larger barrel, etc.

Gene Packman
process supplier - Great Neck, New York
2005


A. Sometimes nothing will work! If you do not believe this, go to a machine shop that has jo blocks in their QC section. I have seen numerous blocks that were "ringed" together and you could pick up a fairly long stick with many blocks from either end and they would stay together like they were super glued. If your parts are perfectly flat and have a trace of moisture, they will stick like they were glued.

James Watts
- Navarre, Florida
2005



Washers nesting and not getting cad coverage

Q. We are plating thousands of washers (they pair with a grommet) per AMSQQP416 [affil link], TY II Cl 2. The indention in the washer makes these want to nest with each other while processing so the washers that are nested only get coverage on the exposed portion. Any suggestions to keep them from nesting within each other? I can rack them, but costs get so high.
Thanks guys. First time poster but enjoy reading what you guys write.

J Lewis
buyer - Fort Worth, Texas USA
September 7, 2018


A. Hi J. We appended your inquiry to a thread which explains the usual methods, while acknowledging that complete success may be impossible with some washers that were designed without barrel plating in mind. Best of luck.

Regards,

pic of Ted Mooney
Ted Mooney, P.E. RET
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
September 2018




(No "dead threads" here! If this page isn't currently on the Hotline your Q, A, or Comment will restore it)

Q, A, or Comment on THIS thread -or- Start a NEW Thread

Disclaimer: It's not possible to fully diagnose a finishing problem or the hazards of an operation via these pages. All information presented is for general reference and does not represent a professional opinion nor the policy of an author's employer. The internet is largely anonymous & unvetted; some names may be fictitious and some recommendations might be harmful.

If you are seeking a product or service related to metal finishing, please check these Directories:

 
Jobshops
Capital
Equipment
Chemicals &
Consumables
Consult'g, Train'g
& Software


About/Contact  -  Privacy Policy  -  ©1995-2024 finishing.com, Pine Beach, New Jersey, USA  -  about "affil links"