Method for manufacturing liquid supply member

A manufacturing method for molding a liquid supply member by using a first mold and a second mold, which are capable of being opened and closed relative to each other and in which the first mold is capable of being slid relatively to the second mold, the method comprising:

• a first molding step of performing injection molding to form a first component part, a second component part, a third component part of the liquid supply member at different positions from each other, with the first and the second mold closed relative to each other;
• an evacuation step of evacuating the second and the third component parts that have been formed in a direction intersecting with a direction of opening and closing of the first mold and the second mold, with the first and the second mold opened relative to each other;
• a moving step of sliding the first mold relative to the second mold in a direction intersecting with the direction of opening and closing of the first mold and the second mold and with the direction of evacuating of the second and the third component parts;
• a contacting step of moving the second and the third component parts in a direction opposite to the direction of evacuating and bringing each of the second and the third component parts that have been formed into contact with the first component part that has been formed;
• and
• a second molding step of performing injection molding to join the first component part and the second and the third component parts, with the first and the second mold closed relative to each other,
• wherein the first component part is located between the second component part and the third component part in the second molding step.