A hot runner system includes a manifold having a heater and a manifold channel network extending between a manifold inlet and a plurality of manifold outlets for distributing a molten plastic. A nozzle seated against the manifold and received in a respective manifold outlet has an extension portion received in the respective manifold outlet, a body portion projecting downstream from the extension portion, and a nozzle channel extending through the extension portion and the body portion. The hot runner system further includes a nozzle support seated against the nozzle, the nozzle support including an upstream nozzle support and a downstream nozzle support, the downstream nozzle support is discrete from and in slidable contact with the upstream nozzle support, and the downstream nozzle support having a looser fit with the body portion of the nozzle than that of the upstream nozzle support's fit with the body portion of the nozzle.

An object of the present invention is to provide a method for manufacturing an injection-molded product of a resin composition containing a P3HA-based resin, capable of performing stable continuous production without generating flash. To achieve the object, provided is a method for manufacturing an injection-molded product by using a mold apparatus for a resin composition containing a P3HA-based resin, the P3HA-based resin being a copolymer containing at least one kind of copolymer of a 3HB unit and another hydroxyalkanoate unit, a parting line that is in contact with a cavity inside a mold included in the mold apparatus having a maximum width of not more than 30 m, a vent portion being provided at a specific position inside the mold, the vent portion having an opening portion with a maximum width of 1 m to 50 m.

An injection molding apparatus includes a cavity, a component removably mountable within the cavity, and a covering. The covering is positionable about the component. The covering and the component are removably installable within the cavity.