Paving block formed of rubber crumb and a method of manufacturing the same
AssigneeInpress Technologies Inc.
InventorClark Chow
Life of this patent
Estimating the term…
Abstract
A hollow paving block comprises a substantially planar member having a first surface and a second surface opposite the first surface. The first surface of the planar member is a textured surface which functions as a top of the paving block. A side wall extends along and away from a periphery of the second surface of the planar member to define a cavity in the paving block. The side wall has a bevelled edge which extends about a mouth of the cavity. At least one protrusion extends along the second surface of the planar member. The paving block is formed in part from crumb rubber and polyolefin.
Claims8
A method of manufacturing an object, the method comprising the steps of:
- providing a mixture of approximately 50% to 80% by weight crumb rubber which is between 10 mesh and less than 20 mesh crumb rubber and 18% to 40% by weight polyolefin having a melting index ranging between approximately 5 g/10 minutes and approximately 50 g/10 minutes;
- feeding the mixture of crumb rubber and granular polyolefin into a barrel and screw;
- heating the mixture of crumb rubber and granular polyolefin in the barrel to a temperature between 150° C. and 220° C. to produce a heated mixture of crumb rubber and melted polyolefin;
- conveying the heated mixture of crumb rubber and melted polyolefin along the barrel towards a nozzle;
- and
- injecting the heated mixture of crumb rubber and melted polyolefin through the nozzle into a mold so that melted polyolefin solidifies and forms a matrix about the crumb rubber.
Dependencies are inferred from the claim text.