In an injection molding machine including a first nozzle and a second nozzle that injects resin into a mold from the first nozzle through the second nozzle, a distance between the second nozzle and the mold is changed with movement of at least the second nozzle in a first direction, and the second nozzle is displaceable in a second direction in a state in which the mold is fixedly secured relative to the first nozzle and the second nozzle is in contact with the first nozzle.

A method of filling a microcavity with layers of a polymer material includes the following steps: (A) estimating a current vertical position of a bottom of the microcavity (current bottom position); (B) lowering the capillary tube into the microcavity towards the current bottom position; (C) dispensing a polymer composition from a tube outlet of the capillary tube under a dispensing applied pressure until the polymer composition substantially fills the microcavity; (D) curing a work piece including the microcavity and the polymer composition in the microcavity to obtain a current layer of the polymer material; and (E) repeatedly executing steps (A), (B), (C), and (D), until the layers of the polymer material have substantially filled the microcavity.

A method of filling a microcavity with layers of a polymer material includes the following steps: (A) estimating a current vertical position of a bottom of the microcavity (current bottom position); (B) lowering the capillary tube into the microcavity towards the current bottom position; (C) dispensing a polymer composition from a tube outlet of the capillary tube under a dispensing applied pressure until the polymer composition substantially fills the microcavity; (D) curing a work piece including the microcavity and the polymer composition in the microcavity to obtain a current layer of the polymer material; and (E) repeatedly executing steps (A), (B), (C), and (D), until the layers of the polymer material have substantially filled the microcavity.

A valve assembly for resin transfer molding is provided. The valve assembly includes an inlet positioned to receive a fluid. The valve assembly additionally includes a valve shaft positioned to receive the fluid from the inlet. The valve assembly further includes an outlet positioned to receive the fluid from the inlet. The valve assembly also includes an injection port positioned to receive the fluid from the valve shaft. The valve assembly also includes a piston configured to move coaxially within the valve shaft, such that the fluid is delivered from the inlet to the outlet when the piston is in a first position, and the fluid is delivered from the inlet to the injection port when the piston is in a second position.

A purpose of the present disclosure is to provide a fine pattern transfer mold and a fine pattern molding method that allow high-resolution transfer of a fine pattern to the interior of a hollow product by integral molding. In a product formation chamber that is formed between a cavity and a core pin member having a predetermined portion at which a fine pattern original plate is fixed by closing of a mold body, a gate into which a molten resin material flows from a hot runner member has an opening that is located outside an end of a fixed surface of the fine pattern original plate in a horizontal direction of the fixed surface and that faces the end of the fixed surface, an injection nozzle of the hot runner member and the gate are directly coupled together, and the hollow product is integrally molded by the resin material flowing from the gate.

An injection molding apparatus includes a mixing section having a hollow cylinder and a stirring member disposed in the cylinder, the mixing section generating a mixed material by using the stirring member to mix a first liquid and a second liquid that flow through the cylinder, the first liquid containing a thermoset material and the second liquid containing a polymerization initiator for initiating a polymerization reaction of the thermoset material, an injection section having a nozzle and being configured to inject the mixed material from the nozzle toward a cavity defined by a fixed molding die and a movable molding die, and a detection section configured to detect a state in the cylinder.

An injection molding apparatus includes a mixing section having a hollow cylinder and a stirring member disposed in the cylinder, the mixing section generating a mixed material by using the stirring member to mix a first liquid and a second liquid that flow through the cylinder, the first liquid containing a thermoset material and the second liquid containing a polymerization initiator for initiating a polymerization reaction of the thermoset material, an injection section having a nozzle and being configured to inject the mixed material from the nozzle toward a cavity defined by a fixed molding die and a movable molding die, and a detection section configured to detect a state in the cylinder.

A three-dimensional shaping device includes: a material storage unit and a mouth portion which is provided below the body portion and which has a hole with a diameter smaller than a maximum inner diameter of the body portion, a material supply unit configured to supply a material to the material storage unit, a melting unit configured to melt the material supplied through the mouth portion, a nozzle configured to discharge the shaping material toward a stage, a remaining state detection unit configured to detect a remaining state of the material, a remaining amount determination unit configured to determine whether a remaining amount of the material is less than a first reference value based on the remaining state, and a control unit configured to supply, when the remaining amount is less than the first reference value, the material to the material storage unit.

A three-dimensional shaping device includes: a material storage unit and a mouth portion which is provided below the body portion and which has a hole with a diameter smaller than a maximum inner diameter of the body portion, a material supply unit configured to supply a material to the material storage unit, a melting unit configured to melt the material supplied through the mouth portion, a nozzle configured to discharge the shaping material toward a stage, a remaining state detection unit configured to detect a remaining state of the material, a remaining amount determination unit configured to determine whether a remaining amount of the material is less than a first reference value based on the remaining state, and a control unit configured to supply, when the remaining amount is less than the first reference value, the material to the material storage unit.

An injection molding machine includes a cylinder that accommodates a molten resin, a discharging nozzle, a piston that discharges the molten resin from the discharging nozzle, and one or more processors configured to execute the following functions. The functions include calculating a target pressure at which a flow rate of the molten resin discharged from the discharging nozzle becomes an indicated flow rate, controlling a pressure of the molten resin in the cylinder such that the pressure becomes the target pressure, acquiring a temperature of the molten resin in the cylinder, and acquiring a pseudo-plastic viscosity corresponding to the temperature of the molten resin. The target pressure is calculated based on the indicated flow rate, the temperature of the molten resin, the pseudo-plastic viscosity, and the size of the discharging nozzle.