Patent ID: 11958222
Assignee: SEIKO EPSON CORPORATION
Field: Other special machines (Mechanical engineering)
Classification: CPC B | IPC B

Claim 0:
1. A plasticizing device that plasticizes a solid material, the plasticizing device comprising:
a drive motor;
a screw rotated around a rotation axis by the drive motor and having a groove forming surface in which a groove is formed, the groove being configured with a bottom, a wall, and a rib;
a barrel having a facing surface facing the groove forming surface and provided with a communication hole in a central portion thereof; and
a heater configured to heat at least one of the screw and the barrel, wherein
a first facing region and a second facing region are provided between the groove forming surface and the facing surface, and the second facing region is closer to the rotation axis than the first facing region,
a first gap is formed between a first tip of the rib and the facing surface in the first facing region, and a second gap is formed between a second tip of the rib and the facing surface in the second facing region,
the second gap is larger than the first gap,
the second gap becomes large toward the rotation axis, and
in a cross section along the rotation axis,
at least one of the groove forming surface and the facing surface corresponding to the first facing region is inclined at a first angle with respect to an intersecting direction perpendicular to the rotation axis,
at least one of the groove forming surface and the facing surface corresponding to the second facing region is inclined at a second angle with respect to the intersecting direction, and
the first angle and the second angle are different.