DE1244601B - Solid rubber tires - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

Int. CL:

B 60 c

German class: 63 e - 21/01

Number: 1244 601

File number: U1052211 / 63 e

Filing date: February 21, 1964

Opened on: July 13, 1967

The invention relates to a solid rubber tire, to increase the wear resistance continuously wire-armored tread is inextricably connected to a metal ring or the wheel.

Numerous solid rubber tires of this type are known. You will usually be immediate the metal ring or the wheel is built up in layers and then connected to it by vulcanization. It has been shown that in heavy-duty tires this structure separation errors between Tread and metal ring occur, creating premature wear and the need frequent tire changes.

It is also known in a tire built on a metal ring between this and a relatively hard outer layer to interpose a softer layer of the same or greater height. However, these layers have the disadvantage that, because of their thickness, they require too much flexing and therefore also lead to separation errors.

The use of a thin layer of damping between the tread and the wheel is true with solid rubber tires known that were not built on the metal ring or a wheel before vulcanization, rather, after vulcanization, they can be pressed onto a ring or rim. However, this has the task of either securing the seat of the tire on the rim, whereby the treads are tensile Have wire inserts near the rim, or even pressing the tire onto the rim to enable or facilitate by slight, radial widening of the rubber layer. These layers are therefore not intended for solid rubber tires that are firmly connected to the metal ring or the wheel.

The object of the invention, on the other hand, is to remedy the aforementioned separation errors in tires of the type specified at the outset to exclude.

This object is achieved in that a known per se between the metal ring and the tread Reinforcement-free damping layer made of rubber is provided, this being inseparable with both parts connected and thin relative to the height of the tread.

Contrary to expectations, this measure brought completely satisfactory results. The lifespan is here- noticeably increased by, and the frequent tire changes that have been common up to now are no longer necessary.

It is particularly advantageous according to the invention if the damping layer has a thickness of 0.25 to 1.27 mm, preferably of about 0.76 mm, and with the tread and the metal ring or Wheel is inextricably linked.

Solid rubber tires

Applicant:

United States Rubber Company,

New York, N.Y. (V. St. A.)

Representative:

Dr. rer. nat. D. Thomsen, patent attorney,

Munich 2, valley 33

Named as inventor:
Howard Hobert Chapman,
Detroit, me. (V. St. A.)

Claimed priority:

V. St. v. America April 30, 1963 (276 814)

The reinforcement of the tread is expedient in a manner known per se in the circumferential direction oriented and the rest of the metal ring cylindrical.

The invention is illustrated below with reference to schematic drawings of an exemplary embodiment explained in more detail. It shows

F i g. 1 shows a solid rubber tire according to the invention in a side view,

FIG. 2 shows, on an enlarged scale, a section along the line II-II in FIG. 1,

FIG. 3, on the same scale as FIG. 1, shows an axial section through the tire according to FIG. 1 before that Vulcanization,

FIG. 4 on the same scale as FIG Cross section through the unvulcanized tire along the line IV-IV in FIG. 3 and

F i g. 5 shows, in an even greater magnification, a circumferential section from the axial section according to FIG. 3.

The tire 10 shown in the figures consists of a cylindrical metal ring 11, on which, fastened by binding agent, a relatively thin reinforcement-free damping layer 12 made of rubber and above a tread 13 with continuous wire

709 610/145

reinforcement is built up, with the outer surfaces of the tread of a relatively thin rubber top layer 14 are covered, which, however, is not in contact with the damping layer 12. the The damping layer has a thickness in the range from 0.25 to 1.27 mm and is preferably 0.76 mm thick.

To produce the solid rubber tire, according to one illustrated in FIGS. 3, 4 and 5 preferred embodiment of the metal ring 11 first in an alkali soap degreasing solution or -cleaning solution degreased and cleaned, then rinsed in cold water and finally in hot Water washed. Then there is a layer of adhesive and then a cushioning layer 12 'of a non-vulcanized rubber compound with a thickness of about 0.76 mm on the Metal ring 11 is applied, which later forms the damping layer 12.

Subsequently, 2.3 mm thick tread layers 13 'are successively applied by roller calenders. (Fig. 3, 4 and 5) made of non-vulcanized wire-reinforced rubber continuously under contact pressure placed, the wires 15 in the tread layers 13 'oriented essentially in the circumferential direction as illustrated in FIG. Finally, the built-up tread is used to protect the mold from damage by the wire or the tread layers 13 'with. a top layer

ίο 14 'covered from a wire-free rubber compound, which, however, is not in contact with the damping layer 12 '. The one built in this way Ring 10 'is then in a conventional shape in a plate press to form the final Tire 10 vulcanized or cured.

The following formulation formulations, which are not the subject of the invention, have been found to be has, for the damping layer 12 ', the tread layers 13' or the cover layer 14 'suitable:

Preferred
lot

area

Damping layer No. 4 smoked rubber in sheets (No. 4 p. P.)

Fast hardening zinc oxide (F.C. ZnO)

No. 3 Medium treatment channel soot (MPC soot)

Treatment oil (partially cracked terpenes and resin acids) [»P.T. OIL «, supplied by Godfrey L. Cabot, Inc.]

Stearic acid

"BLE" (high temperature reaction product of diphenylamine and acetone) [supplied by Naugatuck Chemical]. .

sulfur

MBT (2-mercaptobenzothiazole)

Tread layer

No. 4S.S.

F. C. ZnO

No. 3 MPC carbon black

Treatment oil ("P. T. OIL")

Stearic acid

Accelerator (N-cyclohexyl-2-benzothiazolesulfenamide) ["CBS" supplied by Naugatuck Chemical]

"BLE"

sulfur

1.27 x 0.015 cm (V2 inch x 0.006 inch) brass plated Steel wire

Top layer
No. 4S.S.

MPC carbon black

Stearic acid

Treatment Oil ("TAREX" supplied by Godfrey L. Cabot, Inc.)

F.C. ZnO

"BLE-25"

Accelerator ("CBS")

sulfur

100

12th
47.75

0.4

2.5

0.85

5
1

100

5
50

5
3

0.37
1

35.59

100

50
3

0.37

No. 1 to No. 4 smoked gum in sheets or any suitable Polymer

5th to 15th

35 to 55

0.2 to 0.8
1.5 to 5.0

0.5 to 1.0
3 to 6
0.5 to 1.5

2 to 7
30 to 70

3 to 7
Ibis 4

0.25 to 1.0
0.5 to 2.0
3 to 6

30 to 40

No. 1 to No. 4 pp. Or any suitable polymer

40 to 60 or high abrasion furnace carbon black 2 to 4

any treatment oil, 3 to 8 4 to 6
0.8 to 1.2
0.3 to 0.5

3 to 5

Claims (4)

Patent claims: 1. Solid rubber tires, which are completely wire-armored to increase wear resistance The tread is permanently connected to a metal ring or the wheel, characterized in that that between the metal ring (11) and the tread (13) a known, reinforcement-free Damping layer (12) made of rubber is provided, this being undetachable with both parts connected and thin relative to the height of the tread. 2. Solid rubber tire according to claim 1, characterized in that the damping layer (12) has a Thickness of 0.25 to 1.27 mm, preferably of about 0.76 mm. 3. Solid rubber tire according to claim 1 or 2, characterized in that the reinforcement of the Tread is oriented in a known manner in the circumferential direction. 4. solid rubber tire according to claim 1 to 3, characterized in that the metal ring (11) is cylindrical. Considered publications:
German utility model No. 1 678 755,
1853111; Belgian Patent No. 625,932;
French Patent No. 844 445;
British Patent No. 146,347;
U.S. Patent Nos. 2,525,196, 3,066,716. 1 sheet of drawings 709 610/145 7. 67 © Bundesdruckerei Berlin