Pulverizing apparatus and pulverizing method

Patent metadata

Field	Value
Publication number	US-9409179-B2
Application number	US-201113579309-A
Country	US
Kind code	B2
Filing date	Feb 21, 2011
Priority date	Mar 26, 2010
Publication date	Aug 9, 2016
Grant date	Aug 9, 2016

Abstract

A pulverizing apparatus for pulverizing a hard resin composition has a pulverizing mechanism having a pair of rollers arranged parallel to one another, these rollers pulverizing the hard resin composition by pressuring the hard resin composition between the rollers and a cooling device for cooling the hard resin composition during the hard resin composition being pulverized. Each of the rollers has a cylindrical shape with a hollow portion and the cooling device is configured to supply a coolant into the hollow portion of each of the rollers. The coolant flows in the hollow portion of each of the rollers in a longitudinal direction of each of the rollers. The cooling device has facilitating members respectively inserted into the hollow portions of the rollers.

First claim

What is claimed is:

1. A pulverizing apparatus for pulverizing a sheet-shaped hard resin composition into a pulverized hard resin composition by pressuring the sheet-shaped hard resin composition, the pulverizing apparatus cooling the sheet-shaped hard resin composition and the pulverized hard resin composition, the pulverizing apparatus comprising:
a pulverizing mechanism having a pair of rollers arranged parallel to one another, these rollers pulverizing the sheet-shaped hard resin composition by pressuring the sheet-shaped hard resin composition between the rollers; and
a cooling device for cooling the sheet-shaped hard resin composition during the sheet-shaped hard resin composition being pulverized,
wherein each of the rollers has a cylindrical shape with a hollow portion,
wherein the cooling device is configured to supply a coolant into the hollow portion of each of the rollers and has facilitating members for facilitating a flow of the coolant, and the facilitating members are respectively inserted into the hollow portions of the rollers so as to be respectively rotated together with the rollers,
wherein each of the facilitating members has a main body having a columnar shape and an outer surface and a spirally projecting portion outwardly and spirally projecting from the outer surface of the main body,
wherein the main body has an inflow passage for introducing the coolant into the hollow portion of the roller and an outflow passage for discharging the coolant from the hollow portion of the roller,
wherein the inflow passage is formed at one end portion of the main body and the outflow passage is formed at the other end portion of the main body,
wherein the coolant is introduced into the hollow portion of each of the rollers through the inflow passage of each of the facilitating members, spirally flows in the hollow portion of each of the rollers in only one longitudinal direction thereof due to the spirally projecting portion of each of the facilitating members when each of the rollers rotates and then is discharged from the hollow portion of each of the rollers through the outflow passage of each of the facilitating members,
wherein the cooling device has a chamber in which cool air is supplied during the sheet-shaped hard resin composition being pulverized and the chamber contains the rollers, the sheet-shaped hard resin composition and the pulverized hard resin composition therein,
wherein the chamber has at least two supply ports for supplying the cool air into the chamber and the supply ports are installed on a side wall of the chamber and arranged so as to be opposite to each other through the rollers in a direction perpendicular to the longitudinal direction of each of the rollers,
wherein the at least two supply ports are arranged so as to directly blow the cool air to the sheet-shaped resin hard composition and an outer peripheral surface of each of the rollers,
wherein the rollers are configured to be capable of adjusting a center distance between axes of the pair of rollers,
wherein the pair of rollers comprises a first roller and a second roller, the first roller is restricted so as not to be moved in a direction perpendicular to the axis of the first roller, and the second roller is configured to be capable of being moved in a direction perpendicular to the axis of the second roller,
wherein the pulverizing mechanism further has a biasing portion for biasing the second roller toward the first roller and a restricting portion for restricting the second roller not to move to the first roller over a limit of movement against a bias power from the biasing portion,
wherein the restricting portion has one end portion bend into a L shape and contacting with a housing containing the axis of the second roller, the other end portion supported by the side wall of the chamber and a fixing member slidably provided so as to be opposite to the one end portion, and
wherein the biasing portion is constituted of a coil spring, one end portion of the coil spring contacts with the housing and the other end portion of the coil spring contacts with the fixing member of the restricting portion.

2. The pulverizing apparatus as claimed in claim 1 , wherein a temperature of the coolant is in the range of −5 to 5° C.

3. The pulverizing apparatus as claimed in claim 1 , wherein a temperature of the cool air is in the range of −5 to 5° C.

4. The pulverizing apparatus as claimed in claim 1 , wherein the outer peripheral surface of each of the rollers is constituted of a ceramic material.

5. The pulverizing apparatus as claimed in claim 4 , wherein each of the rollers has a core portion containing the hollow portion and an outer layer provided on an outer periphery of the core portion, the core portion is constituted of a metallic material and the outer layer is constituted of the ceramic material.

6. The pulverizing apparatus as claimed in claims 1 , wherein each of the rollers has an outer diameter changing portion having an outer diameter changing along with a longitudinal direction of each of the rollers.

7. The pulverizing apparatus as claimed in claim 6 , wherein the outer diameter changing portion has the outer diameter gradually increasing from a center portion of the roller toward both end portions of the roller.

8. The pulverizing apparatus as claimed in claim 6 , wherein the outer diameter changing portion of each of the rollers has the outer diameter gradually decreasing from a center portion of each of the rollers toward both end portions of each of the rollers.

9. The pulverizing apparatus claimed in claim 1 , wherein a thickness of the sheet-shaped hard resin composition is in the range of 0.5 to 3 mm and a clearance between the outer peripheral surfaces of the rollers is in the range of 1 to 2 mm.

Assignees

• Ueda Shigehisa
• Noda Kazuo
• Sumitomo Bakelite Co

Inventors

• Ueda Shigehisa
• Noda Kazuo

Classifications

• B02C4/02 Primary

  with two or more rollers · CPC title

• B02C4/32

  Adjusting, applying pressure to, or controlling the distance between, milling members · CPC title

• B29B13/10 Primary

  by grinding, e.g. by triturating; by sieving; by filtering · CPC title

• B02C4/44

  Cooling or heating rollers or bars · CPC title

• B29B9/04

  in the form of plates or sheets · CPC title