Production manner null of formation die of channel substrate of ink jet head, and channel substrate formation die of ink jet

摘要

PURPOSE: To obtain superior bubble discharge properties by injection molding by a method wherein in an ink jet head obtained by injection molding at least ink chambers and supply paths, the supply path is equal to the ink chamber in width but smaller than the same in depth. ;CONSTITUTION: A mold for injection molding a flow path substrate 230 is composed of a flow path molding piece and a peripheral part molding piece. The flow path molding piece is composed of a supply path forming groove provided from one end to the other end and ink chamber wall forming grooves provided from one end to the other end of the flow path molding piece crosswise to the supply path forming groove with a depth larger than that of the same. By using this mold, the flow path substrate 230 is molded with ink chambers 170 separated by ink chamber walls 180, supply paths 35 connected to the ink chambers 170 with a width equal to the ink chamber 170 and a depth smaller than the same, and a common ink reservoir 53. A bubble intruding into the common ink reservoir 53 is sucked into the ink supply path 35 with the suction of ink, depressed from downward in the supply path 35, deformed along a top sealing member, gradually moved toward the outlet of the supply path 35, and led to the ink chamber 170.;COPYRIGHT: (C)1994,JPO&Japio