Plasticizing device

Patent metadata

Field	Value
Publication number	US-11465347-B2
Application number	US-201916583345-A
Country	US
Kind code	B2
Filing date	Sep 26, 2019
Priority date	Sep 27, 2018
Publication date	Oct 11, 2022
Grant date	Oct 11, 2022

Abstract

A plasticizing device includes a driving motor, a rotor that is rotated by rotation of the driving motor and has a groove-formed surface having a groove formed in a rotation direction, and a barrel that is opposite to the groove-formed surface and has a communication hole and a heater, plasticizes a material supplied between the groove and the barrel by rotation of the rotor and heating by the heater, and causes the plasticized material to flow out from the communication hole. Aside surface of the groove has a protrusion and recess surface including protrusion portions or recess portions.

First claim

What is claimed is:

1. A plasticizing device comprising:
a driving motor;
a rotor that is rotated by rotation of the driving motor and has a groove-formed surface having a groove formed in a rotation direction; and
a barrel that is opposite to the groove-formed surface and has a communication hole and a heater, wherein
the groove is formed in a spiral shape from an outer circumferential end of the groove-formed surface toward a center of the groove-formed surface,
a material supplied between the groove and the barrel is plasticized by rotation of the rotor and heating by the heater and is caused to flow out from the communication hole, and
a side surface of the groove has a protrusion and recess surface including protrusion portions or recess portions.

2. The plasticizing device according to claim 1 , wherein
the recess portions and the protrusion portions are formed along a rotation axis of the rotor and are alternately repeated in the rotation direction.

3. The plasticizing device according to claim 1 , wherein
the number of the recess portions or the protrusion portions increases from the center of the groove-formed surface toward the outer circumferential end of the groove-formed surface.

4. The plasticizing device according to claim 1 , wherein
the number of the recess portions or the protrusion portions increases from the outer circumferential end toward the center of the groove-formed surface.

5. A plasticizing device comprising:
a driving motor;
a rotor that is rotated by rotation of the driving motor and has a groove-formed surface having a groove formed in a rotation direction; and
a barrel that is opposite to the groove-formed surface and has a communication hole and a heater, wherein
the groove is formed in a spiral shape from an outer circumferential end of the groove-formed surface toward a center of groove-formed surface,
a material supplied between the groove and the barrel is plasticized by rotation of the rotor and heating by the heater and is caused to flow out from the communication hole, and
a surface roughness Ra of a side surface of the groove is 20 μm or more.

6. The plasticizing device according to claim 1 , further comprising:
a protrusion and recess surface including protrusion portions or recess portions on a bottom surface of the groove.

7. A plasticizing device comprising:
a driving motor;
a rotor that is rotated by rotation of the driving motor and has a groove-formed surface having at least one groove formed in a radial direction of the groove-formed surface; and
a barrel that is opposite to the groove-formed surface and has a communication hole and a heater, wherein
a material supplied between the groove and the barrel is plasticized by rotation of the rotor and heating by the heater and is caused to flow out from the communication hole,
the at least one groove is formed in a spiral shape from an outer circumferential end of the groove-formed surface toward a center of the groove-formed surface, and
wherein the groove-formed surface is characterized by:

0.43
<

n
×
w

r

<
1.00

where
n is a number of the at least one groove,
w is a width of the at least one groove, and
r is a radius of the groove-formed surface.

8. A plasticizing device comprising:
a driving motor;
a rotor that is rotated by rotation of the driving motor and has a groove-formed surface having a groove formed in a rotation direction; and
a barrel that is opposite to the groove-formed surface and has a communication hole and a heater, wherein
a material supplied between the groove and the barrel is plasticized by rotation of the rotor and heating by the heater and is caused to flow out from the communication hole, and
the groove is formed in a spiral shape from an outer circumferential end of the groove-formed surface toward a center of the groove-formed surface, and
a depth of the groove decreases from the outer circumferential end toward the center of the groove-formed surface, and
wherein the groove-formed surface is characterized by:

D
a

D
b

>
6.82

where
D a is a depth of the groove at the outer circumferential end of the groove-formed surface, and
D b is a depth of the groove at the center of the groove-formed surface.

Assignees

• Seiko Epson Corp

Inventors

• Sasagawa Kakeru
• Yokota Kei
• Anegawa Kenta
• Yamashita Seiichiro
• Watanabe Yusuke
• Sasage Yuichi
• Inutsuka Mitsuru

Classifications

• B22F12/52

  Hoppers · CPC title

• B22F12/226

  for rotary motion · CPC title

• B22F10/66

  by mechanical means · CPC title

• B22F10/20

  Direct sintering or melting · CPC title

• B22F12/53

  Nozzles · CPC title