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Material for pelletizer knife?

Material for pelletizer knife?

Material for pelletizer knife?

(OP)
Does anyone know what kind of material is best to use for pelletizer blades for use in the plastic industry?

This is a customer request. The largest size knife they can buy is 2.12" x 1.37" wide by 0.047" thick. They think the knife would work better if it was 2.3" long by 1.37" wide by 0.047" thick.

The sample knife I have is a shiny gray metal with a mirror finish and is magnetically responsive.

I thought perhaps it was some sort of high speed steel or possibly something such as Stellite© but wondered if anybody could give me a more exact answer.

Thank you,
Tom Walz
Carbide Processors
 

Thomas J. Walz
Carbide Processors, Inc.
www.carbideprocessors.com

Good engineering starts with a Grainger Catalog.    

RE: Material for pelletizer knife?

I think from memory it is stellite ot tungsten carbide.

It might depend on what polymers and additives are being pelletized. I imagine 50% glass filled nylon is more demanding than unfilled LDPE and that rigid PVC has it's own unique requirements as might very soft and tough elastomers.

Regards
Pat
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