Rubber vehicular impact barrier

• US 5,336,016 A
• Filed: 09/09/1993
• Issued: 08/09/1994
• Est. Priority Date: 08/18/1993
• Status: Expired due to Fees

• Current Assignee: Guenter A. Baatz
• Original Assignee: Guenter A. Baatz
• Inventors: Baatz, Guenter A.
• Primary Examiner(s): Britts, Ramon S.
• Assistant Examiner(s): LISEHORA, JAMES
• Application Number:
  US08/118,301
• Time in Patent Office: 334 Days
• Field of Search: 404/6, 404/7, 404/8, 404/9, 404/10, 404/32, 256/13.1, 264/122, 264/126
• US Class Current: 404/6
• CPC Class Codes: B29B 17/0042 for shaping parts, e.g. multilayered parts with at least one layer containing regenerated plastic
• CPC Class Codes: B29K 2021/00 Use of unspecified rubbers as moulding material
• CPC Class Codes: C08L 19/003 Precrosslinked rubber; Scrap rubber; Used vulcanised rubber
• CPC Class Codes: C08L 2666/08 Homopolymers or copolymers according to C08L7/00 - C08L21/00; Derivatives thereof
• CPC Class Codes: C08L 7/00 Compositions of natural rubber
• CPC Class Codes: E01F 15/0476 Foundations
• CPC Class Codes: E01F 15/086 using plastic, rubber or synthetic materials
• CPC Class Codes: E01F 15/088 Details of element connection
• CPC Class Codes: Y02W 30/62 Plastics recycling; Rubber recycling

Abstract

This invention relates to a method of manufacturing a homogeneous solid rubber vehicular barrier, comprising the steps of: mixing and knead melting a mixture of: 80 to 90 percent by weight particles of recycled waste rubber; 10 to 20 percent by weight virgin rubber; and an accelerator composition; forming the mixture in a mould to a selected barrier configuration thus forming a barrier; curing the mixture within the mould at a temperature of 250 ° to 450° C. at a pressure of 500 to 1000 psi for a period of time from 1.5 to 7.5 hours; and removing the cured barrier from the mould. A homogeneous moulded solid rubber vehicular barrier, is thereby formed of 80 to 90 percent by weight particles of recycled waste rubber in a matrix of 10 to 20 percent by weight virgin rubber. The completed barrier has a finished outer surface of cured uncontaminated rubber, and has a Shore hardness of between 65 and 70.

Claims

1. A method of manufacturing a homogeneous solid rubber vehicular barrier, comprising the steps of:

mixing and knead melting a mixture of;

80 to 90 percent by weight particles of recycled waste rubber;

10 to 20 percent by weight virgin rubber; and

an accelerator composition;

forming the mixture in a mould to a selected barrier configuration thus forming a barrier wherein the barrier has an elongate body of uniform cross section, said cross section being substantially trapezoidal having a base, a top surface and two inclined concave side surfaces;

curing the mixture within the mould at a temperature of 250°

to 450°

C at a pressure of 500 to 1000 psi for a period of time from 1.5 to 7.5 hours wherein said barrier when fully cured has a finished outer surface of cured uncontaminated rubber, and has a Shore hardness of between 65 to 70; and

removing the cured barrier from the mould.

2. A method according to claim 1 wherein the mixture comprises 87 to 89 percent said waste rubber and 11 to 13 percent said virgin rubber.

3. A method according to claim 1 wherein the temperature is from 325°

to 375°

C.

4. A method according to claim 1 wherein the pressure is from 700 to 800 psi.

5. A method according to claim 1 wherein the period of time is from 4 to 5 hours.

6. A method according to claim 1 including the step of adding colouring pigments to the mixture during the mixing step.

7. A method according to claim 1 including the step of magnetically removing metallic contaminants from the recycled waste rubber particles prior to said mixing step.

8. A homogeneous moulded solid rubber vehicular barrier, comprising:

80 to 90 percent by weight particles of recycled waste rubber; and

10 to 20 percent by weight virgin cured uncontaminated rubber, and has a Shore hardness of between wherein said barrier has a finished outer surface of between 65 to 70 and wherein the barrier has an elongate body of uniform cross section, said cross section being substantially trapezoidal having a base, a top surface and two inclined concave side surfaces.

9. A barrier according to claim 8 having a mass of between 13 and 17 tons.

10. A barrier according to claim 8 wherein the recycled waste rubber particles contain metallic contaminants, and the finished outer surface is free of said metallic contaminants.

11. A barrier according to claim 8 wherein the recycled waste rubber particles comprise reclaimed particles of vehicular tires of a maximum dimension less than or equal to 3/8 the of an inch.

12. A barrier according to claim 8 wherein the recycled waste rubber particles comprise particles reclaimed from buffing of retread vehicular tires.

13. A homogeneous moulded solid rubber vehicular barrier, comprising:

80 to 90 percent by weight particles of recycled waste rubber; and

10 to 20 percent by weight virgin rubber;

wherein said barrier has a finished outer surface of cured uncontaminated rubber, and has a Shore hardness of between 65 and 70 and wherein the barrier has an elongate body of uniform cross section including bottom pedestal means for embedment of the barrier.

14. A homogeneous moulded solid rubber vehicular barrier, comprising:

80 to 90 percent by weight particles of recycled waste rubber; and

10 to 20 percent by weight virgin rubber;

wherein said barrier has a finished outer surface of cured uncontaminated rubber, and has a Shore hardness of between 65 to 70, the barrier including interconnecting means at longitudinally opposing ends of the barrier for interconnecting like barriers in a longitudinal series, wherein the interconnecting means comprise a mating tongue and groove of substantially triangular horizontal cross section.