A piston includes: a base body; a sealing ring provided at an outer peripheral surface of the base body and configured to slidingly contact an inner peripheral surface of a container; a pressing body provided at one side of the base body in a non-hermetical state with respect to the container, the one side being close to a fluid; and a supporting member supporting the pressing body in a state where the pressing body is separated from the base body. The base body includes an air discharge hole through which an inside and outside of the container communicate with each other, the inside and outside of the container being sealed by the sealing ring. The pressing body can approach and separate from the base body between a first position at which the pressing body opens the air discharge hole and a second position at which the pressing body closes the air discharge hole. The pressing body is supported by the supporting member at the first position and moves to the second position by force applied from the fluid in the container.

A toy system includes: a toy body including an interface; an extrusion tube including a sidewall that defines an open interior region, the sidewall extends from a first end to a second end, at least one of the first end and the second end is configured to attach to the interface, and the sidewall defines extrusion features that pass through the sidewall; and a plunger configured to move in the interior region and to force a moldable material in the interior region through the extrusion features to form an extruded moldable material.

A toy system includes: a toy body including an interface; an extrusion tube including a sidewall that defines an open interior region, the sidewall extends from a first end to a second end, at least one of the first end and the second end is configured to attach to the interface, and the sidewall defines extrusion features that pass through the sidewall; and a plunger configured to move in the interior region and to force a moldable material in the interior region through the extrusion features to form an extruded moldable material.

A molding method for a resin molded article includes: a step of sandwiching a sheet-shaped resin in a molten state extruded downward by a pair of rollers, and sending out downward the sheet-shaped resin in the molten state by a rotational driving of the rollers so as to allow a first stretching; a step of drawing downward the sheet-shaped resin in the molten state sent out downward so as to allow a second stretching; a step of disposing the sheet-shaped resin in the molten state that is drawn in a side portion of a mold disposed below the pair of rollers; and a step of molding the sheet-shaped resin into a shape conforming to a mold shape by depressurizing a sealed space formed between the sheet-shaped resin in the molten state and the mold and/or pressurizing the sheet-shaped resin toward the mold.

Provided is a blow-molding method capable of suppressing generation of blister-like bubbles and producing a high quality hollow molded article when forming a thick hollow molded article by blow-molding. A blow-molding method includes setting a die-slit interval in a die head according to a target wall thickness of a hollow molded article to be molded, extruding a molten resin in an accumulator into a cylindrical shape from the die slit to form a parison, and molding the parison in a mold. The die-slit interval is made smaller than a value set according to the target wall thickness at start of extrusion, and then is increased to match the value set according to the target wall thickness. The value set according to the target wall thickness is preferably corrected considering wall thickness reduction due to drawdown. The wall thickness of the hollow molded article is preferably 3.5 mm or more.

Provided is a blow-molding method capable of suppressing generation of blister-like bubbles and producing a high quality hollow molded article when forming a thick hollow molded article by blow-molding. A blow-molding method includes setting a die-slit interval in a die head according to a target wall thickness of a hollow molded article to be molded, extruding a molten resin in an accumulator into a cylindrical shape from the die slit to form a parison, and molding the parison in a mold. The die-slit interval is made smaller than a value set according to the target wall thickness at start of extrusion, and then is increased to match the value set according to the target wall thickness. The value set according to the target wall thickness is preferably corrected considering wall thickness reduction due to drawdown. The wall thickness of the hollow molded article is preferably 3.5 mm or more.

A method of additive manufacturing of un-vulcanized rubber includes providing a printing apparatus and providing un-vulcanized rubber to the printing apparatus. The method also includes warming the un-vulcanized rubber and pressurizing the un-vulcanized rubber provided to the printing apparatus to a pressure of at least 800 psi. The method further includes positioning a dispenser at a beginning of a series of motion control commands, dispensing the un-vulcanized rubber from the printing apparatus onto an area, and cutting the dispensed un-vulcanized rubber.

A group of hollow modules through which the material to be extruded flows, is provided that includes at least: a rectangular heating-shaping module (6), in which the material undergoes a temperature increase and takes on the desired shape; and a tubular cooling-solidification module (8), in which the material, which has taken on the desired shape, changes from liquid to solid with said shape. A heating-reaction module (2) is provided upstream of module (6). The heating-reaction module (2) includes an interchangeable hollow tube (3) with an external heating system (4). The heating-shaping module (6) includes detachable parts (7) and includes another external heating system (4) based on the auto-acceleration of the curing reaction and of the heat supply from said system (4). The tubular portion between module (2) and module (6) includes a shaping coupling (5) equipped with a through-hole. The extrusion module includes a circuit through which the polymer flows into at least two push compartments (20).

A method for manufacturing an antibacterial resin according to the present invention includes the following steps. The method includes: a preparation step of preparing synthetic resin powder and an antibacterial additive; a dispersion step of introducing into a mixer the synthetic resin powder together with iron balls having a pointed protrusion formed on an outer surface thereof and dispersing particles; a dispersion and mixing step of introducing the antibacterial additive into the mixer containing the synthetic resin powder, followed by dispersion and mixing; a pellet forming step of separating the iron balls and forming the mixture of the synthetic resin powder and the antibacterial additive into pellets by melting, extrusion and cutting; and a product producing step of introducing the pellets into an injection molding machine to produce an antibacterial resin product; wherein white charcoal powder is included in the antibacterial additive in the mixing step.

A method of introducing color to a polymer stream during the manufacturing of bulked continuous carpet filament comprises: adding a colorant to a polymer stream downstream of a primary extruder; changing a color probe within a color injection port while maintaining the flow of the polymer stream at a polymer stream pressure; using one or more static mixing assemblies for the polymer stream to substantially uniformly mix the polymer stream and its colorant; and spinning the polymer stream with its substantially uniformly mixed colorant into BCF using a spinning machine.