Apparatus, mold, injection molding machine, manufacturing unit, method for manufacturing resin molded product, and valve unit

An apparatus comprising:

• a first flow path member configured to define a first section of a flow path;
• a second flow path member configured to define a second section of the flow path;
• a valve unit configured to suppress backflow in the flow path;
• and
• a fastening member configured to fasten the first flow path member and the second flow path member,
• wherein in a state where the first flow path member and the second flow path member are fastened by the fastening member, the valve unit is sandwiched between the first flow path member and the second flow path member, and the first section and the second section are connected via the valve unit, and
• the valve unit is detachable from the first flow path member and the second flow path member in a state where fastening of the first flow path member and the second flow path member by the fastening member are released.