An injection molding machine that contributes to improving the quality of a workpiece is provided. An injection molding machine configured to causes torpedo pistons to be slid in one way to thereby plasticize a resin material supplied to a first space of a cylinder, and causes a molten resin to flow into a second space of the cylinder and causes the torpedo pistons to be slid in the other way to thereby inject the molten resin. The injection molding machine includes pressurizing pistons inserted into the torpedo pistons so that the pressurizing pistons can be slid in such a way that an amount of protrusion of the cylinder into the second space of the cylinder with respect to the torpedo pistons is changed, and energizing means for energizing the pressurizing pistons toward the second space of the cylinder.

Disclosed is a system and a related method for regulating a temperature in a shooting pot associated with an injection molding machine. The structure includes, amongst other things, a cooling circuit and thermocouple proximate a plunger entry end of the shooting pot as well as a cooling adjustment unit for controlling an amount of cooling provided by the cooling fluid. In operation a controller coupled with the cooling adjustment unit and the thermocouple controls the cooling adjustment unit based on a temperature reading associated with the thermocouple.

An injection molding machine capable of continuously injecting a molten resin is provided. An injection molding machine including: a plurality of cylinders; a plurality of pistons configured to extrude the molten resin inside the respective cylinders; a plurality of drive parts configured to drive the respective pistons; an injection part configured to inject the molten resin extruded from the plurality of cylinders; and a controller configured to control the plurality of drive parts. The controller controls the plurality of drive parts in such a way that a period during which the molten resin is injected from a first cylinder overlaps a period during which the molten resin is injected from a second cylinder and the molten resin is continuously injected from the plurality of cylinders.

An injection molding machine that contributes to improving the quality of a workpiece is provided. An injection molding machine configured to causes torpedo pistons to be slid in one way to thereby plasticize a resin material supplied to a first space of a cylinder, and causes a molten resin to flow into a second space of the cylinder and causes the torpedo pistons to be slid in the other way to thereby inject the molten resin. The injection molding machine includes pressurizing pistons inserted into the torpedo pistons so that the pressurizing pistons can be slid in such a way that an amount of protrusion of the cylinder into the second space of the cylinder with respect to the torpedo pistons is changed, and energizing means for energizing the pressurizing pistons toward the second space of the cylinder.

A manufacturing apparatus includes a defining portion, a plunger, and a valve member. The defining portion defines a supply port, a discharge port, and a resin channel. The resin channel includes a reserving portion, a first partial channel connecting the supply port and the reserving portion, a second partial channel connecting the reserving portion and the discharge port, a relay channel connecting the first partial channel, the reserving portion and the second partial channel, and a connecting channel connecting the first partial channel and the second partial channel. The plunger discharges the molten resin reserved in the reserving portion. The valve member is provided in the connecting channel and the second partial channel. The first partial channel and the relay channel are connected to the connecting channel so as to intersect with the connecting channel. The valve member includes a first valve portion and a second valve portion.

A shooting pot assembly for a two-stage injection unit includes: (a) a housing; (b) a plunger chamber in the housing; (c) an injection plunger in the plunger chamber; and (d) a conduit network including (i) a feed conduit, (ii) an outlet conduit, and (iii) a transfer conduit. The shooting pot assembly further includes (e) a purge valve assembly having a purge conduit open to the plunger chamber and in fluid communication with the transfer conduit via the plunger chamber when the plunger is in the advanced position. The purge valve assembly further includes a purge valve closure member movable between a closed position, in which the purge conduit is blocked, and an open position, in which the purge conduit is open for flushing stale melt from the transfer conduit through the purge conduit via supply of fresh melt into the transfer conduit from the feed conduit.

A molding material supply device and a molding material supply method capable of supplying a degassed molding material to a molding apparatus at a desired timing are desired. According to the molding material supply device and method of the disclosure, a first discharge member is driven to discharge a molding material accommodated in a first accommodation member to a second discharge member through a through hole of a die, and a second discharge member configured by the first accommodation member and the die advances to discharge the molding material having been degassed in the second accommodation member to the molding apparatus from a molding material supply port.

A resin injection apparatus includes: a mold die and a receiving die configured to hold a core body in an axial direction of the core body, the core body having a resin formation region serving as a region where resin is to be formed by injection of molten resin; a plurality of plungers; and a pot group attached to the mold die, the pot group including a plurality of pots proximately located next to each other in a direction. Each of the plurality of pots has a through hole in which a corresponding plunger of the plungers is insertable. The plurality of pots have a first coefficient of thermal expansion that is lower than a second coefficient of thermal expansion of the mold die.

A resin injection apparatus includes: a mold die and a receiving die configured to hold a core body in an axial direction of the core body, the core body having a resin formation region serving as a region where resin is to be formed by injection of molten resin; a plurality of plungers; and a pot group attached to the mold die, the pot group including a plurality of pots proximately located next to each other in a direction. Each of the plurality of pots has a through hole in which a corresponding plunger of the plungers is insertable. The plurality of pots have a first coefficient of thermal expansion that is lower than a second coefficient of thermal expansion of the mold die.

An injection apparatus (100) for injecting molten plastic into a mold for molding one or more hollow articles, in particular, bottle preforms; the injection apparatus (100) comprisingtwo injectors (1, 2), each defining a respective longitudinal axis (X, X), adapted to receive the molten plastic and inject it alternately into the mold; and a conduit (3, 31, 32, 33), having an inlet opening (30) for the molten plastic, adapted to be connected to a plasticization apparatus (102) and to conduct the molten plastic from the plasticization apparatus (102) towards the two injectors (1, 2); wherein the length of said conduit (3) is less than the length (Ltot) of each of the two injectors (1, 2) along the respective longitudinal axis (X, X).