Method of reclaiming rubber from vehicle tires

• US 5,482,215 A
• Filed: 01/24/1994
• Issued: 01/09/1996
• Est. Priority Date: 06/13/1991
• Status: Expired due to Term

• Current Assignee: Southern Rubber Pty Limited
• Original Assignee: CMHT Technology Pty Limited
• Inventors: Veres, George
• Primary Examiner(s): Eley, Timothy V.
• Application Number:
  US08/162,084
• Time in Patent Office: 715 Days
• Field of Search: 241/1, 241/3, 241/14, 241/15, 241/24, 241/29, 241/DIG. 31, 241/DIG. 38, 241/101.4
• US Class Current: 241/1
• CPC Class Codes: B26D 3/005 for cutting used tyres
• CPC Class Codes: B29B 17/02 Separating plastics from other materials
• CPC Class Codes: B29B 17/0206 Selectively separating reinforcements from matrix material by destroying the interface bound before disintegrating the matrix to particles or powder, e.g. from tires or belts
• CPC Class Codes: B29B 17/0404 to powder
• CPC Class Codes: B29B 2017/0021 Dividing in large parts
• CPC Class Codes: B29B 2017/0094 Mobile recycling devices, e.g. devices installed in truck trailers
• CPC Class Codes: B29B 2017/0203 Separating plastics from plastics
• CPC Class Codes: B29B 2017/0224 Screens, sieves
• CPC Class Codes: B29B 2017/0272 Magnetic separation
• CPC Class Codes: B29B 2017/0428 Jets of high pressure fluid
• CPC Class Codes: B29B 2017/044 Knives
• CPC Class Codes: B29C 2791/001 Shaping in several steps
• CPC Class Codes: B29K 2021/00 Use of unspecified rubbers as moulding material
• CPC Class Codes: B29K 2705/12 Iron
• CPC Class Codes: B29L 2030/00 Pneumatic or solid tyres or parts thereof conveyor belts B29L2031/7092; drive belts B29L2031/7094; fourdrinier belts B29L2031/733
• CPC Class Codes: Y02W 30/52 Mechanical processing of waste for the recovery of materials, e.g. crushing, shredding, separation or disassembly
• CPC Class Codes: Y02W 30/62 Plastics recycling; Rubber recycling
• CPC Class Codes: Y10S 241/31 Rubber preparation

Abstract

A method of reclaiming rubber from vehicle tyres that enables the high grade rubber in the tread portion of the tire to be collected separate from the lower grade rubber in the sidewalls and other areas of the tire. The method comprising separating the complete tread portion from the remainder of the tire and then removing from that tread portion the high grade tread rubber. Thereafter the remainder of the tread portion and the sidewall and bead portion of the tire are each treated to separate the rubber from metallic and fabric reinforcement materials therein. The high quality tread rubber and lower grade other rubber are both removed in a particulate form.

Claims

1. A method of reclaiming rubber from a vehicle tire incorporating an annular tread portion having a metallic reinforcement belt underlying a layer of tread rubber, and respective sidewalls, said method comprising:

separating the tread portion from the respective sidewalls and forming a tread portion strip;

treating said tread portion strip to remove the layer of tread rubber from the reinforcement belt in a particle form;

separately treating the tread portion strip to remove the remaining rubber from the reinforcement belt in a particle form, and

separately treating the sidewalls to reduce the sidewalls to a particle form,

the steps of treating the tread strip portion to remove the remaining rubber and the treating of the sidewalls each being performed independently of the step of removal of the tread rubber and each by the use of ultra high pressure liquid jets.

2. A method as claimed in claim 1, wherein the material of the reinforcement belt is separately collected as the tread portion strip is treated to remove said remaining rubber from the tread portion strip.

3. A method as claimed in claim 2, wherein the particulate sidewall material is treated to separate the rubber particles from sidewall fibre reinforcement particles.

4. A method as claimed in claim 2, wherein the separated tread portion of the tire is cut transversely to form two or more tread portion sections and each said section is treated to remove the tread rubber therefrom.

5. A method as claimed in claim 1, wherein the particulate sidewall material is treated to separate the rubber particles from sidewall fibre reinforcement particles.

6. A method as claimed in claim 1, wherein the separated tread portion of the tire is cut transversely to form two or more tread portion sections and each said section is treated to remove the tread rubber therefrom.