| 摘要 |
PURPOSE:To improve abrasion resistibility and durability as the guide member of the printing wire for a dot matrix type printer by providing a prularity of penetrated hole on a ceramic sintering body making Si3N4 as the main component. CONSTITUTION:A powder forming body with Si3N4 powder being made as a main body is sintered. Guide holes are formed in this sintered body by laser working and wire polishing. The wire guide member of dot matrix type printer obtained in this manner is improved the durability thereof under the high speed condition of a printing action. |
