Defibrating apparatus and fiber body manufacturing apparatus

Patent metadata

Field	Value
Publication number	US-11851817-B2
Application number	US-202217814847-A
Country	US
Kind code	B2
Filing date	Jul 26, 2022
Priority date	Jul 28, 2021
Publication date	Dec 26, 2023
Grant date	Dec 26, 2023

Abstract

A defibrating apparatus includes a screen and housings, and side walls of the housings have inner surfaces that define the inner surface of a discharge path. Let communication hole be any through-hole that interconnects the defibrating chamber and the discharge path, and let discharge path-side opening edge be the opening edge, close to the discharge path, of the through-hole, then the screen has through-hole rows, each of which is formed by a plurality of communication holes arranged at an interval in a circumferential direction, and the through-hole row is provided at a position where the discharge path-side opening edge of the communication holes is overlapped with the inner surface as seen in a radial direction.

First claim

What is claimed is:

1. A defibrating apparatus comprising:
a rotational body;
a plate shaped side wall to which the rotational body is rotatably coupled;
a defibrating chamber that is partially defined by the plate shaped side wall, in which the rotational body is stored, and in which a defibrated material is formed from a raw material containing fibers while the rotational body is rotated;
a circular annular wall fixed to the plate shaped side wall such that an interval is provided between the circular annular wall and the rotational body in a radial direction of the rotational body, the circular annular wall partially defining the defibrating chamber;
a discharge path arranged such that the circular annular wall is disposed between the discharge path and the defibrating chamber;
a plurality of through-holes provided in the circular annular wall, the discharge path communicating with the defibrating chamber via the plurality of through-holes, and receiving the defibrated material discharged from the defibrating chamber via the plurality of through-holes; and
a housing that forms the discharge path, a side wall of the housing extending in a circumferential direction of the circular annular wall and having an inner surface that defines the discharge path, the side wall of the housing contacting the circular annular wall;
the discharge path having a width in an axial direction of the rotational body, and extends in the circumferential direction of the circular annular wall,
when a communication hole is any of the through-holes which interconnect the defibrating chamber and the discharge path, and a discharge path-side opening edge is any of opening edges, closest to the discharge path, of a plurality of communication holes each of which is the communication hole,
the circular annular wall having a communication hole group formed by a part of the plurality of communication holes, arranged at intervals in the circumferential direction, and
the communication hole group being provided at a position where the discharge path-side opening edge is overlapped with the inner surface as seen in the radial direction.

2. The defibrating apparatus according to claim 1 ,
wherein a pair of side walls of the housing, each of which is the side wall, is provided at an interval in the axial direction, and each of the side walls has the inner surface,
a pair of communication hole groups, each of which is the communication hole group, is arranged in the circular annular wall, and
one of the communication hole groups is provided at a position where the discharge path-side opening edge is overlapped with one of the inner surfaces as seen in the radial direction, and the other of the communication hole groups is provided at a position where the discharge path-side opening edge is overlapped with the other of the inner surfaces as seen in the radial direction.

3. The defibrating apparatus according to claim 1 ,
wherein a dimension of the circular annular wall in the axial direction is greater a dimension of the width of the discharge path, and
the housing forms the discharge path by covering an outside of the circular annular wall.

4. The defibrating apparatus according to claim 3 , further comprising
a fixing member that fixes the circular annular wall,
wherein the housing is fixed to the fixing member with the circular annular wall interposed between the fixing member and the housing.

5. The defibrating apparatus according to claim 1 , further comprising:
a discharge pipe that receives a negative pressure to discharge the defibrated material through the discharge path; and
a discharge section that interconnects the discharge path and the discharge pipe,
wherein the housing forms the discharge path in an annular shape by surrounding the outside of the circular annular wall in the circumferential direction, and has an outer circumferential wall provided at an interval from the circular annular wall in the radial direction, and
the discharge section is provided in the outer circumferential wall, and opened toward the circular annular wall.

6. A fiber body manufacturing apparatus comprising:
the defibrating apparatus according to claim 1 ;
a web former that is arranged downstream relative to the defibrating apparatus in a transport direction of the defibrated material, and forms a web by accumulating the defibrated material discharged from the defibrating apparatus; and
a fiber body former that is arranged downstream relative to the web former in a transport direction of the web, and forms a fiber body including the fibers by binding the fibers contained in the web.

Assignees

• Seiko Epson Corp

Inventors

• Omagari Naoko

Classifications

• D21F9/04 Primary

  of the cylinder type · CPC title

• D21B1/061 Primary

  using cutting devices · CPC title

• D21B1/32

  of waste paper · CPC title

• Y02W30/64

  Paper recycling · CPC title