To prevent/reduce wear on injection tools would you recommend dlc coatings? What are the parameters to consider to designing the coating? What is the life time? Are there any imitations on the injection tool size? What other coatings are possible?
Dear Corrine,
for sure you can try use DLC coatings. I know about tests on forming tools for instance. Typically the wear and frition of DLC is very low compared to other coatings. For this reason they are very interesting for the automotive industry for instance.
But you have to consider that there is a huge variety of DLC coatings and preparation technologies. In general you can differ between diamond like carbon coatings a) with hydrogen, b) without hydrogen or c) with metallic additives. For preperation you can use CVD or PVD technologies. Depending on the technology the tool size is limited. As an example we can handle parts with a length of ~ 0,5 m.
Regards
Dear Corrine,
A question for me is what kind of medium you would like to "inject". DLC is already industrially in use for automotive gas injection systems, e.g. injection needles. If you want to inject fluids or e.g. liquid polymers, modifications of DLC with very low surface energy can be used to prevent adhesion of the medium to the injection tool. Possible material for this application are e.g. Si- and/or F-doped DLC coatings which reach low surface energies like TEFLON.
Regards
Kirsten
Corrine we have seen good results using our system in a number of the applications you have listed. you visit us at www.ietmechannical.com for initial information. I will glad to provide more information to you directly
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