Press-fitting cap and its production

Abstract

Abstract PURPOSE:To obtain a press-fitting cap which is easy to produce and has a high reliability, by forming a soft metallic layer on all of the outside face and a specific part of the inside face from the aperture end up to prescribed dimensions of a covered metallic cap body. CONSTITUTION:A covered metallic cap body 21 which consists of a nickel silver and has one end closed and has the other end opened has a foundation metallic layer 22 where copper, an electric nickel, a chemical nickel, or the like is plated with 1-3mu thickness on all of the inside face and the outside face. A soft metallic layer 23 which has 5-20mu thickness and consists of a solder or the like is formed on all of the outside face and a specific part of the inside face from the aperture end up to prescribed dimensions H of the foundation metallic layer 22. Prescribed dimensions H are set to a value approximately equal to the height of a stem to be press-fitted to this cap 20. The soft metallic layer 23 is formed by soaking a cap intermediate structure, where the foundation metallic layer 22 is formed, in a solder plating bath while packing gas smaller than the volume of the inside of this structure into the inside of this structure.

Inventors

• 👤 Zenichi Fukuma
• 👤 福馬　全一

Bibliographic Details