Pulverizer, absorber manufacturing apparatus provided with the same, and pulp sheet pulverizing method

Patent metadata

Field	Value
Publication number	US-2016199849-A1
Application number	US-201414917057-A
Country	US
Kind code	A1
Filing date	Sep 1, 2014
Priority date	Sep 12, 2013
Publication date	Jul 14, 2016
Grant date	—

Abstract

Provided are a pulverizer that enables to uniformly pulverize a pulp sheet in the axial direction of a rotary shaft, an absorber manufacturing apparatus provided with the same, and a pulp sheet pulverizing method. A plurality of cutter plates are disposed away from each other at an interval in the axial direction of a rotary shaft. Each of the cutter plates includes a plurality of pulverizing blades aligned circumferentially along the outer periphery edge of the cutter plate. At least one of the cutter plates is fixed to the rotary shaft in a state that the cutter plate is inclined with respect to a direction orthogonal to the rotary shaft.

First claim

1 . A pulverizer for pulverizing a pulp sheet, comprising:
a casing into which the pulp sheet is introduced; and a rotary blade including a plurality of cutter plates accommodated in the casing, and a rotary shaft fixed to the cutter plates in a state that the rotary shaft passes through the cutter plates in a thickness direction of the cutter plates, wherein the cutter plates are disposed away from each other at an interval in an axial direction of the rotary shaft, each of the cutter plates includes a plurality of pulverizing blades aligned circumferentially along an outer periphery edge of the cutter plate, and at least one of the cutter plates is fixed to the rotary shaft in a state that the at least one of the cutter plate is inclined with respect to a direction orthogonal to the rotary shaft.

2 . The pulverizer according to claim 1 , wherein
all the cutter plates are inclined with respect to the direction orthogonal to the rotary shaft.

3 . The pulverizer according to claim 2 , wherein
the cutter plates are disposed in parallel to each other.

4 . The pulverizer according to claim 2 , wherein
a title angle of a specific one of the cutter plates with respect to the rotary shaft is set in such a manner that a pulverizing range by which the pulverizing blades of the specific cutter plate are axially displaced when the rotary shaft makes one turn is deviated from a pulverizing range of the cutter plate adjacent to the specific cutter plate.

5 . The pulverizer according to claim 1 , wherein
the pulverizing blades of the respective two adjacent cutter plates of the cutter plates are disposed at positions away from each other circumferentially of the rotary shaft.

6 . An absorber manufacturing apparatus for manufacturing an absorber, comprising:
the pulverizer of claim 1 ; a fiber stacking device which forms pulp fibers obtained by pulverizing by the pulverizer into a predetermined shape of the absorber; and a duct which guides the pulp fibers from the pulverizer to the fiber stacking device.

7 . A method for pulverizing a pulp sheet with use of a pulverizer provided with a casing; and a rotary blade including a plurality of cutter plates accommodated in the casing, and a rotary shaft fixed to the cutter plates in a state that the rotary shaft passes through the cutter plates in a thickness direction of the cutter plates, each of the cutter plates including a plurality of pulverizing blades aligned circumferentially along an outer periphery edge of the cutter plate, the method comprising:
a rotating step of rotating the rotary shaft in a state that the cutter plates are disposed away from each other at an interval in an axial direction of the rotary shaft, and that at least one of the cutter plates is inclined with respect to a direction orthogonal to the rotary shaft; and an introducing step of introducing the pulp sheet into the casing in a state that the rotating step is executed.

Assignees

• Zuiko Corp

Inventors

• Wada Takao

Classifications

• B29C41/02

  for making articles of definite length, i.e. discrete articles · CPC title

• B02C18/145

  with knives spaced axially and circumferentially on the periphery of a cylindrical rotor unit · CPC title

• B02C18/146

  with a rotor comprising a plurality of axially contiguous disc-like segments each having at least one radially extending cutting element · CPC title

• A61F13/15617 Primary

  Making absorbent pads from fibres or pulverulent material with or without treatment of the fibres · CPC title

• B02C18/182

  Disc-shaped knives · CPC title