Resin extruder, rotor-type screw, and resin manufacturing method
AssigneeThe Japan Steel Works, Ltd.
InventorsMakoto ISHIKAWA, Kyouhei YATA, Yohei SHIMIZU, Masao KURIHARA
Life of this patent
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Abstract
A resin extruder capable of efficiently improving performance of kneading a resin material is provided. A resin extruder (1) according to one embodiment includes a cylinder (20), and a rotor-type screw (33) that is disposed in the cylinder (20) and kneads a resin material (51). In the rotor-type screw (33), a top part (33b) of a flight (33a) is formed in such a way that a gap between the top part (33b) and an inner surface of the cylinder (20) is changed from a front point to a rear point of the rotor-type screw in a rotation direction in a cross section that is vertical to an axial direction.
Claims14
A resin extruder comprising:
- a cylinder;
- and
- a rotor-type screw that is disposed in the cylinder and kneads a resin material, wherein
- in the rotor-type screw, a top part of a flight is formed in such a way that a gap between the top part and an inner surface of the cylinder is changed from a front point to a rear point of the rotor-type screw in a rotation direction in a cross section that is vertical to an axial direction.
A rotor-type screw for an extruder that kneads a resin, wherein a top part of a flight is formed in such a way that a gap between the top part and an inner surface of a cylinder is changed from a front point to a rear point of the rotor-type screw in a rotation direction in a cross section that is vertical to an axial direction.
A resin manufacturing method comprising rotating a rotor-type screw that is disposed in a cylinder and in which a top part of a flight is formed in such a way that the size of a gap between the top part and an inner surface of the cylinder is gradually decreased from a front point to a rear point of the rotor-type screw in a rotation direction in a cross section that is vertical to an axial direction and elongating a resin material that is present in the gap from the front to the rear in the rotation direction.
Dependencies are inferred from the claim text.