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 core molding apparatus and a core molding method capable of reducing the possibility of the deterioration in the calculation accuracy of the amount of supply of a raw material for a core are provided. A core molding apparatus includes: a kneading tank configured to knead a raw material for a core; a raw material supply unit configured to supply the raw material to the kneading tank; a mold configured to contain a kneaded material made of the raw material kneaded in the kneading tank and to mold the core; a piston configured to inject the kneaded material contained in the kneading tank into the mold; and a control unit configured to control an amount of supply of the raw material from the raw material supply unit to the kneading tank.

The invention relates to a food packaging unit (20) comprising a food container (1) for receiving a liquid, pasty or free-flowing food. The injection-moulded, single-component, cup-shaped base body (2) of the food container surrounds, with a wall (5), a bottom (6) and an outwardly projecting collar (7), an opening (4) which is closed by a food-container-covering film (10) applied to the collar (7). The food container (1) is injection-moulded in a single layer from a polymer blend comprising two components, a first component of which being PVOH or a PVOH copolymer. The food-container-covering film (10), which can be applied to the plastic food container (1) in order to close the opening (4) by sealing, welding or adhesion, comprises a cellulose-containing layer which is coated with PVOH, or a PVOH polymer blend layer.

The device for feeding molten plastic material into a molding cavity (30) includes a melting chamber (20) in which metered solid plastic material is introduced, a sonotrode (10) provided for tightly inserting a portion thereof into said melting chamber (20), causing the plastic material to melt by means of vibration, and relative movement of the sonotrode (10) and melting chamber (20) allows driving the molten plastic material inside a molding cavity (30) communicated with said melting chamber (20), the device including resistance sensors (40) allowing an electronic control device (50) to know the resistance that the plastic material has against the movement of the sonotrode (10).

A plasticizing device includes a driving motor, a rotor rotated around a rotation axis by the driving motor and having a groove forming surface on which a groove is formed, a barrel having an opposed surface opposed to the groove forming surface, a communication hole into which a plasticized material flows being provided in the barrel, a housing section housing the rotor, a first restricting section fixed to the rotor and having a first contact surface facing the barrel side, and a second restricting section fixed to the housing section, opposed to the first contact surface, and having a second contact surface contactable with the first contact surface. Movement of the rotor along the rotation axis is restricted by the first restricting section and the second restricting section. The groove forming surface is separated from the opposed surface at a predetermined interval in a state in which the first contact surface and the second contact surface are in contact.

A plasticizing device includes a driving motor, a rotor rotated around a rotation axis by the driving motor and having a groove forming surface on which a groove is formed, a barrel having an opposed surface opposed to the groove forming surface, a communication hole into which a plasticized material flows being provided in the barrel, a housing section housing the rotor, a first restricting section fixed to the rotor and having a first contact surface facing the barrel side, and a second restricting section fixed to the housing section, opposed to the first contact surface, and having a second contact surface contactable with the first contact surface. Movement of the rotor along the rotation axis is restricted by the first restricting section and the second restricting section. The groove forming surface is separated from the opposed surface at a predetermined interval in a state in which the first contact surface and the second contact surface are in contact.

The present disclosure provides an injection machine for a recycled plastic injection molding system. The injection machine comprises a supplying system configured to drive plastics from an entry end to downstream of receiving route, a heating system disposed to downstream of the supplying system and configured to melt plastics and drive plastics to the downstream of receiving route, and a buffer system disposed to downstream of the heating system and configured to be a receiving state and a supplying state. When the buffer system is in the receiving state, the buffer system is configured to receiving plastics from the heating system. When the buffer system is in the supplying state, the buffer system is configured to drive plastics to downstream of the receiving route.

A plasticizing device includes a driving motor, a rotor rotated around a rotation axis by the driving motor and having a groove forming surface on which a groove is formed, a barrel having an opposed surface opposed to the groove forming surface, a communication hole into which a plasticized material flows being provided in the barrel, a housing section housing the rotor, a first restricting section fixed to the rotor and having a first contact surface facing the barrel side, and a second restricting section fixed to the housing section, opposed to the first contact surface, and having a second contact surface contactable with the first contact surface. Movement of the rotor along the rotation axis is restricted by the first restricting section and the second restricting section. The groove forming surface is separated from the opposed surface at a predetermined interval in a state in which the first contact surface and the second contact surface are in contact.

A plasticizing device includes a driving motor, a rotor rotated around a rotation axis by the driving motor and having a groove forming surface on which a groove is formed, a barrel having an opposed surface opposed to the groove forming surface, a communication hole into which a plasticized material flows being provided in the barrel, a housing section housing the rotor, a first restricting section fixed to the rotor and having a first contact surface facing the barrel side, and a second restricting section fixed to the housing section, opposed to the first contact surface, and having a second contact surface contactable with the first contact surface. Movement of the rotor along the rotation axis is restricted by the first restricting section and the second restricting section. The groove forming surface is separated from the opposed surface at a predetermined interval in a state in which the first contact surface and the second contact surface are in contact.

An injection piston drives a screw. An injection hydraulic cylinder drives the injection piston and is partitioned into first and second chambers. A first oil discharge port is disposed in the injection hydraulic cylinder to be blocked by a piston part when the piston part of the injection piston advances to a pressure-holding switching position, and discharges hydraulic oil from the second chamber. A second oil discharge port is disposed in the injection hydraulic cylinder to be capable of discharging hydraulic oil from the second chamber regardless of the position of the injection piston. The injection piston has first and second members. The joint of the first and second members is disposed at a position separated from an end of the piston part on a side of the second chamber by a predetermined distance.