Storage container and manufacturing method of the same
A storage container with improved strength and airtightness, and a method for manufacturing the storage container are provided. The storage container includes, as a functional resin member, an insert component for a container body insert-molded with a molding material containing predetermined resin. The functional resin member is a side wall plate with support pieces. The side wall plate has a thick portion having at least a thickness of a side wall of the container body, and a thin joint portion formed around the thick portion, to be interposed into and joined to a peripheral wall of the container body. Most of the peripheral wall and the thin joint portion are engaged and joined to enlarge their contact area to eliminate a decrease of the mechanical strength and leakage around the peripheral edge of the side wall plate and prevent the peripheral wall from parting from the side wall plate.
1. A storage container including an insert component as a functional resin member for a container that is insert-molded with a resin-containing molding material, wherein the functional resin member comprises:
a thick portion having a thickness equal to or greater than a thickness of a wall of the storage container;
at least one rib protruding, with a thin-plate form, from an entire circumferential edge of the thick portion;
a plurality of bulging portions formed on a distal end of the at least one rib, the plurality of bulging portions bulging from both sides of the at least one rib; and
a plurality of molding material passage holes formed on the at least one rib,
the at least one rib, the plurality of bulging portions, and the plurality of molding material passage holes are interposed into and joined to the wall of the container, and
the plurality of bulging portions and the plurality of molding material passage holes are arrayed on the at least one rib in an alternate manner along a longitudinal direction of the at least one rib.
2. The storage container according to claim 1 , wherein the container is a front open box container body capable of arranging and storing a plurality of substrates.
3. The storage container according to claim 2 , wherein the functional resin member is a side wall plate in which a plurality of support pieces are arranged adjacent to one another, each support piece being capable of supporting a side of a peripheral edge of a substrate.
4. The storage container according to claim 2 , wherein the functional resin member is a window plate that forms a rear portion of the container body and allows a stored substrate to be seen.
5. The storage container according to claim 1 , wherein the plurality of bulging portions and the plurality of molding material passage holes are arrayed on each of the at least one rib in the alternate manner along the longitudinal direction of the at least one rib.
6. A manufacturing method for the storage container according to claim 1 , the method comprising the steps of:
inserting a functional resin member into a mold for molding the container; and
filling the mold with a resin-containing molding material to form the container by integrating the functional resin member with the molding material.