This disclosure provides an injection molding system for use with a material, the system comprising: a heated barrel; a member mounted in the barrel for melting the material and for ejecting molten material; a pair of mold plates, one of the pair being operatively coupled to the barrel in use, the other of the pair being movable relative to other plate for movement between a closed position and an open position, characterized in that the barrel is defined by a nested part and a protruding part, the nested part having an external end which is disposed exteriorly of the one of the pair of mold plates and an internal end which, in use, is disposed interiorly of the one of the pair of mold plates and engaged therewith, the protruding part, in use, extending to the nested part and being releasably coupled thereto in end-to-end communicating relation.

A mold includes: a fixed mold; a movable mold facing the fixed mold; a first plate having a first opening into which the fixed mold is incorporated and fixing the fixed mold; and a second plate having a second opening into which the movable mold is incorporated and fixing the movable mold. The fixed mold and the movable mold define a cavity. The fixed mold and the movable mold are sized for attachment to a first injection molding device, and the first plate and the second plate are sized for attachment to a second injection molding device different from the first injection molding device.

A mold includes: a fixed mold; a movable mold facing the fixed mold; a first plate having a first opening into which the fixed mold is incorporated and fixing the fixed mold; and a second plate having a second opening into which the movable mold is incorporated and fixing the movable mold. The fixed mold and the movable mold define a cavity. The fixed mold and the movable mold are sized for attachment to a first injection molding device, and the first plate and the second plate are sized for attachment to a second injection molding device different from the first injection molding device.

The present invention provides a die assembly for molding a resin-made insert having a sleeve that is inserted into an intake port of an internal combustion engine. Each sleeve has one inlet and two outlets. The die assembly includes an inner die and an outer die. The inner die includes an inlet side part and an outlet side part. The inlet side part and the outlet side part mold an inner peripheral surface of the sleeve in an assembled state, and are removed in mutually opposite directions. By means of this assembly, a sleeve having a complicated structure and shape can be molded easily.

The present invention provides a die assembly for molding a resin-made insert having a sleeve that is inserted into an intake port of an internal combustion engine. Each sleeve has one inlet and two outlets. The die assembly includes an inner die and an outer die. The inner die includes an inlet side part and an outlet side part. The inlet side part and the outlet side part mold an inner peripheral surface of the sleeve in an assembled state, and are removed in mutually opposite directions. By means of this assembly, a sleeve having a complicated structure and shape can be molded easily.

There is provided a method which includes: plasticizing and melting a thermoplastic resin to provide a molten resin in a plasticization zone of a plasticizing cylinder; allowing the molten resin to be in a starved state in a starvation zone of the plasticizing cylinder; introducing a pressurized fluid containing a physical foaming agent having a fixed pressure into the starvation zone to retain the starvation zone at the fixed pressure; bringing the molten resin in the starved state in contact with the pressurized fluid containing the physical foaming agent having the fixed pressure in the starvation zone in a state in which the starvation zone is retained at the fixed pressure; and molding the molten resin having been brought in contact with the pressurized fluid containing the physical foaming agent into the foam-molded product.

There is provided a method which includes: plasticizing and melting a thermoplastic resin to provide a molten resin in a plasticization zone of a plasticizing cylinder; allowing the molten resin to be in a starved state in a starvation zone of the plasticizing cylinder; introducing a pressurized fluid containing a physical foaming agent having a fixed pressure into the starvation zone to retain the starvation zone at the fixed pressure; bringing the molten resin in the starved state in contact with the pressurized fluid containing the physical foaming agent having the fixed pressure in the starvation zone in a state in which the starvation zone is retained at the fixed pressure; and molding the molten resin having been brought in contact with the pressurized fluid containing the physical foaming agent into the foam-molded product.

A method for detachably attaching a linking unit, including an end with a hole and a slit, to a mold, the method comprising inserting a first attachment member connected to the mold through the hole; and inserting a second attachment member connected to the mold through the slit, wherein the linking unit is detached from the mold by moving the linking unit in a direction opposite to a direction in which the slit is formed in a state where the first attachment member is disconnected from the mold and the second attachment member remains connected to the mold.

A method for detachably attaching a linking unit, including an end with a hole and a slit, to a mold, the method comprising inserting a first attachment member connected to the mold through the hole; and inserting a second attachment member connected to the mold through the slit, wherein the linking unit is detached from the mold by moving the linking unit in a direction opposite to a direction in which the slit is formed in a state where the first attachment member is disconnected from the mold and the second attachment member remains connected to the mold.