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US 8,940,816 B2Granted
Master batch for ceramic- or metal-powder injection-molding, and method for preparing said master batch
AssigneeCommissariat A L'energie Atomique Et Aux Energies Alternatives
InventorsFlorence Servant, Pascal Tiquet
Life of this patent
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Abstract
The master batch for molding includes at least one inorganic powder, advantageously ceramic or metallic; an organic mixture, advantageously polymer, comprising: a stable polymer having good ductility features, from 30 to 90% by mass of the mixture; a lubricant, from 5 to 30% by mass of the mixture; a plasticizing polymer, from 5 to 30% by mass of the mixture; with a [% by mass of the lubricant]/[% by mass of the stable polymer] ratio smaller than or equal to 1, advantageously strictly smaller than 1.
Claims14
A method for manufacturing a molded part comprising the steps of:
- preparing a master batch comprising:
- at least one ceramic or metallic powder;
- and
- an organic mixture comprising:
- a linear low density polyethylene as a stable polymer having good ductility features, from 30 to 90% by mass of the organic mixture;
- a paraffin wax as a lubricant, from 5 to 50% by mass of the organic mixture;
- and
- polyethylene glycol as a plasticizing polymer, from 5 to 30% by mass of the organic mixture;
- with a [% by mass of the lubricant]/[% by mass of linear low density polyethylene] ratio smaller than or equal to 1:
- injecting said master batch into a mold to form the part;
- thermally debinding the part at a temperature ranging between 300 and 500° C.;
- and
- sintering the part.
10 more elements
Dependencies are inferred from the claim text.