To provide a method for manufacturing an injection cylinder whose injection needle connection part is sealed, small in the number of parts, low in cost, easy in manufacture and high in reliability without possibility of causing a liquid leaking accident even when being subjected to a sterilization treatment using an autoclave.
In the method for manufacturing the injection cylinder provided with a tubular main tube part, a bottom part having a hood part and the injection needle connection part and a connection part connecting them, a recessed part is provided on an outer side face at the end part of the main tube part and also a recessed part is provided on the inner side face of the hood part. Also, for the connection part, an unhardened or unsolidified resin is introduced between the outer side face at the end part of the main tube part and the inner side of the hood part of the bottom part and is hardened or solidified so as to form projection parts respectively corresponding to the recessed parts provided on the outer side face at the end part of the main tube part and the inner side face of the hood part.
AKIYAMA HIDEO
SUZUKI HIROKAZU
Hiroshi Ochi
Sadao Matsumura
Isamu Kakiuchi