FR2775933A1 - A one-piece solid wheel made of recycled rubber - Google Patents

Abstract

The one-piece wheel rim is made up of two half-sections in the shape of truncated cones the bases correspond to the flat faces of a cylindrical hub. A polypropylene or polyamide hub can be force fitted. The angle at the top of each truncated cone is 80-82 deg. .The wheel is made by stove molding regenerated powdered rubber with the usual additives at 160-200 deg. for 12 to 15 minutes

Description

The present invention relates to a solid wheel made of a rubber material.

  choueux and its manufacturing process.

  A wheel traditionally comprises a rim and a bandage held in position thereon. Current rims consist of a steel circle connected to the hub or of a plastic material body, the edges of which form a bead to prevent the tire from going off the rails. For some applications, the rim is connected to the hub by spokes, which saves material not

  negligible and therefore a reduction in cost.

  In addition, rubber bandages are made from recycled rubber which is generally in the form of crumb. Apart from the wheels made of certain high hardness plastic materials, such as those of roller skates for example, there is no known wheel made entirely of

recycled rubber.

  One of the aims of the present invention is to provide a completely reactive wheel.

made of recycled rubber.

  Another object of the invention is to provide such a wheel having a rigidity

  dity and cohesion at least of the same order as the current wheels.

  A further object of the invention is to provide a method which makes it possible to

make such a wheel.

  These aims, as well as others which will appear subsequently, are achieved by a wheel which is characterized, according to the present invention, by the fact that it is

  monobloc and regenerated rubber.

  Advantageously, this wheel has two half-sections in a truncated cone

  inverted whose large base is constituted by its hub.

  Preferably, the angle at the top of each truncated cone is included

  between 80 and 82 degrees approximately and preferably 81 degrees.

  The present invention also relates to a method for manufacturing such a wheel, which is characterized in that a mixture is mixed in a mold.

  regenerated rubber powder, defrayed and steamed with syn-

  usual thesis, that the mixture obtained is cooked at a temperature between et200 OC for 12 to 15 min.

  The description which follows and which is in no way limiting, must

  be read with reference to the appended figures: - Figure 1 shows a side view of a wheel according to the present invention; and

  3s - FIG. 2 represents a vertical section of the wheel according to FIG. 1.

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  As can be seen in the figures, a wheel, designated in its entirety

  ble by the reference 1, monobloc or solid, in recycled or regenerated rubber, that is to say comprising a solid rim 2 also forming a tread 3. The rim 2 comprises a hub 4 force-fitted, or base, a material such as polypropylene or polyamide, which makes it possible to obtain a rubbing surface

  smooth and soft with the wheel axle.

  In vertical section according to FIG. 2, the wheel 1 has half-sections 1a and 1b in inverted truncated cone, the base of which is constituted by its hub 4. The angle at the top of each truncated cone is between 80 and 82 degrees: he's from

preferably around 81 degrees.

  This one-piece wheel made of a regenerated or recycled rubber material is made of a 100% recycled material, in this case recycled rubber, and

  is also fully recyclable.

  To make such a wheel, rubber powder is recycled.

  key or regenerated, unlocked, calibrated and steamed with usual synthetic adjuvants. Then the whole is heated to a temperature between 160 and 200 for 12 to 15 min. Preferably the temperature is around 180

  C and the duration of 15 minutes.

  According to the process of the present invention, an overall density is obtained

  between 75 and 90 degrees Shore: a wheel according to the present invention con-

  titue an assembly with a high resistance to bending and torsion.

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Claims (5)

  1. Solid wheel, characterized in that it is in one piece and made of rubber regenerated cabbage.   2. Solid wheel, according to claim 1, characterized in that it pre-   feels two half-sections (la, lb) in inverted truncated cone whose large base is constituted by its hub (4).   3. Solid wheel according to claim 2, characterized in that the angle   at the top of each truncated cone is between 80 and 82 degrees.   4. Method for manufacturing a wheel, according to claims 1 to 3, which is   characterized by the fact that a rubber powder is mixed in a mold   regenerated, scraped and steamed with usual synthetic adjuvants.   5. Method according to claim 4, characterized in that the mixture obtained is cooked at a temperature between 160 and 200 C for 12 to min.