A molding unit (10) for forming a container made of thermoplastic material, includes:a mold bottom (16) that is movable between a low position, an intermediate boxing position and a high position;a carriage (24) that supports the mold bottom (16) and is mounted in a movable manner in a fixed holder (26);actuation elements for moving the carriage (24) into its intermediate boxing position;the actuation elements including a cylinder (32) that houses a piston (98) liable to push the mold bottom (16) through a boxing travel; characterized in that the mold bottom (16) is supported in a fixed manner by the carriage (24), the cylinder (32) being fixed with respect to the fixed holder (26). A method for employing the molding unit is also described.

A process for producing a container includes the steps of: selecting, in a mold selection step, a mold for a base container from a group of molds consisting of molds for a base container for infusion application and molds for a base container for irrigation, mold blowing, preferably extrusion mold blowing, in a blowing step, the base container in the mold, such that the base container has at least one opening, removing, in a removal step, the base container from the mold, filling, in a filling step, the base container with a liquid, closing, in a closing step, the base container so as to form the produced container, sterilizing, in a sterilization step, the produced container. The container is suitable for infusion application or for irrigation application.

A modular system for blow molding a container. The system may include a first portion, a second portion, and a third portion. The first portion and second portion may each include a shell, a mold removably coupled to the shell, and a top plate. The third portion may include a base and a base mold. The molds may be 3D printed. The molds together may define a blow mold cavity. The modular system may be used at lab scale, pilot scale, or full production scale. The molds may be durable and smooth enough for full production scale. Some embodiments are directed to methods for making a modular system for blow molding a container.