Title:
射出装置
Document Type and Number:
Japanese Patent JP7297973
Kind Code:
B2
Abstract:
To provide an injection device that suppresses wear on a contact surface between a head main portion and a backflow prevention ring.SOLUTION: There is provided an injection device, comprising: a cylinder; a screw arranged rotatably and freely in an advancing/retreating manner in the cylinder; rotating means for rotating the screw; and advancing/retreating means for advancing/retreating the screw, in which the injection device is configured in that: the screw has a screw head, a seal ring, and a flight screw which are rotated integrally, and a non-co-rotating backflow prevention ring; the screw head has a head main portion, and a rod portion that connects the head main portion and the seal ring, and is inserted into the backflow prevention ring; the head main portion has a shape that generates a force to push back the backflow prevention ring when the screw rotates; and a front surface of the backflow prevention ring facing a rear end surface of the head main portion and receiving a pushing force is formed on a plane perpendicular to a rotation axis of the screw.SELECTED DRAWING: Figure 4
Inventors:
Tomohito Ryokaku
Application Number:
JP2022075386A
Publication Date:
June 26, 2023
Filing Date:
April 28, 2022
Export Citation:
Assignee:
Sumitomo Heavy Industries Ltd.
International Classes:
B29C45/60
Domestic Patent References:
| JP2017056655A | ||||
| JP5269810A | ||||
| JP49019066U | ||||
| JP2010247432A | ||||
| JP57167817U | ||||
| JP59120431A |
Attorney, Agent or Firm:
Tadashige Ito
Tadahiko Ito
Tadahiko Ito
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