Liquid discharge cartridge manufacturing method

A liquid discharge cartridge manufacturing method comprising:

• a first step of individually shaping a first shaped member and a second shaped member that form a housing of a liquid discharge cartridge;
• and
• a second step of joining the first shaped member and the second shaped member to be bonded to each other with molten resin,
• wherein the first step includes:
• shaping a first wall section and a second wall section in the second first shaped member, the first wall section and the second wall section for forming a recess for accommodating the molten resin;
• and
• shaping a first projection and a second projection in the first shaped member such that in a case where the first shaped member and the second shaped member are joined in the second step:
• (i) the first projection extends such that the first projection is located at an outer side of the first wall section, with a first gap being formed between the first projection and the first wall section;
• and
• (ii) the second projection extends such that the second projection is located at an outer side of the second wall section, with a second gap being formed between the second projection and the second wall section.