Component of printing head for wire-impact type dot printer and molding method thereof
AssigneeSeiko Epson Corporation
InventorsKiyofumi Koike, Minoru Tanaka
Life of this patent
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Abstract
Disclosed are a magnetic circuit component of an impact dot head and a molding method thereof by which the number of parts is reduced, and an excellent magnetic efficiency is exhibited. At least one member among a plurality of members constituting a magnetic circuit component (e.g., a core block 1) of a printing head is injection-molded after kneading a binder with metallic powder of a magnetic substance. The single member is sintered by joining it to another molded member after effecting de-binder processing, thus manufacturing the component.
Claims10
A component of a magnetic circuit of a printing head for a dot printer, characterized in that at least one element of said component in the magnetic circuit is configured as a joint body of a plurality of at least two elements joined to each other, one of said elements including magnetic powder and previously molded from a binder and said magnetic powder and thereafter separately debindered to remove said binder at a high temperature and thereafter the two elements being joined by sintering;
- wherein said metallic powder is a material exhibiting at least one of a high permeability and a high saturated magnetic flux density.
A method of forming a component of a magnetic circuit for a printing head for a dot printer, comprising the steps of:
- forming at least one magnetic circuit component as a joint body of a plurality of elements, at least one of said elements formed from metallic powder and binder by injection molding followed by the step of separately debindering to remove said binder at a high temperature;
- bringing together said at least one debindered element and a second element;
- and
- sintering said brought together second element and said previously molded debindered element to join said elements into the component;
- said metallic powder being a material exhibiting at least one of a high permeability and a high saturated magnetic flux density.
A method of forming a component of a magnetic circuit for a printing head for a dot printer, comprising the steps of:
- forming at least one magnetic circuit component as a joint body of a plurality of elements, at least one of said elements formed from metallic powder by injection molding, at least a second of said elements not formed from metallic powder;
- sintering said at least one of said previously molded elements and said at least second element to join said elements into said component;
- and
- said metallic powder being a material exhibiting at least one of a high permeability and a high saturated magnetic flux density.
Dependencies are inferred from the claim text.