Plasticizing device, injection device, molding apparatus, and manufacturing method of molded parts

1. A plasticizing device comprising:

a barrel of a tubular shape comprising a resin material supply port portion which is formed in a peripheral wall portion and to which a resin material is supplied, and a fiber supply port portion which is formed on a distal side from the resin material supply port portion in the peripheral wall portion and to which a continuous fiber is supplied; and

a screw that comprises a shaft body, and a flight of a spiral shape formed integrally on a peripheral surface of the shaft body, and is received in the barrel and rotating in a rotating direction,

wherein the barrel is disposed with a posture in which its axial line intersects a gravitational direction,

a maximum length of a rectangular opening in the barrel of the fiber supply port portion with two edges parallel to the axial line of the barrel is 1 time or more and 2 times or less as much as a pitch of the flight disposed in a portion of the screw which faces the rectangular opening in the barrel of the fiber supply port portion in a direction perpendicular to the axial line of the barrel.

2. The plasticizing device according to claim 1 , wherein, in a planar view of the fiber supply port portion when the fiber supply port portion is seen in the gravitational direction, one end of the rectangular opening in the barrel of the fiber supply port portion in a width direction perpendicular to the axial line is located between a position distant as much as a distance R(√3/2), in which R is an inner diameter of the barrel, from the axial line in the width direction and a position distant as much as a distance R from the axial in the width direction line, including these two positions, in a range where the rotating direction of the screw around the axial line becomes a downward direction along the gravitational direction.

3. The plasticizing device according to claim 2 , wherein, in the planar view of the fiber supply port portion when the fiber supply port portion is seen in the gravitational direction, the one end of the rectangular opening in the barrel of the fiber supply port portion in the width direction is located at the position distant as much as the distance R from the axial line in the range where the rotating direction of the screw around the axial line becomes the downward direction along the gravitational direction.

4. The plasticizing device according to claim 2 , wherein, in the planar view of the fiber supply port portion when the fiber supply port portion is seen in the gravitational direction, the other end of the fiber supply port portion in the width direction is located in a range where the rotating direction of the screw around the axial line becomes an upward direction along the gravitational direction.

5. The plasticizing device according to claim 3 wherein, in the planar view of the fiber supply port portion when the fiber supply port portion is seen in the gravitational direction, the other end of the fiber supply port portion in the width direction is located in a range where the rotating direction of the screw around the axial line becomes an upward direction along the gravitational direction.

6. The plasticizing device according to claim 1 , wherein the screw comprises a supplying section, a compressing section, a measuring section, a fiber pull-in section, and a fiber kneading section, and the sections are arranged in order from a proximal end of the screw toward a distal end thereof,

the fiber pull-in section faces the rectangular opening in the direction perpendicular to the axial line, and in the shaft body, a diameter of a portion in which the fiber pull-in section is formed is smaller than a diameter of a portion in which the measuring section is formed and a diameter of a portion in which the fiber kneading section is formed.

7. An injection device comprising:

the plasticizing device according to claim 1 ;

a discharging section connected to a distal end of the barrel; and

an injecting section coupled with the discharging section and configured to inject a resin supplied through the discharging section, the resin being already molten and kneaded in the plasticizing device.

8. A molding apparatus comprising:

the injection device according to claim 7 ; and

a clamping device configured to clamp a mold into which the resin is injected by the injection device.