JPS58152612A - Weight balance correcting component material for tire - Google Patents

Abstract

PURPOSE:To improve retainability of the titled component being used and removability at the time of recorrection, by a method wherein a weight balance correction component for an aeroplane is constituted of an upper layer material made of a rubber composite of high specific gravity and a lower layer material made of a rubber composite of low tensile strength, and the lower layer material is made to adhere to the inner surface of the tire. CONSTITUTION:An upper layer material 6 having thickness of 2-10mm. is formed of a rubber composite having specific gravity of more than 1.5, a lower layer material 7 having thickness of 0.5-1.5mm. is formed of a rubber composite having tensile strength of 1-100kg/cm<2>, and a paste layer 8, such as an adhesive for rubber is formed. This component material 11 mounted on an inner plate layer 1 of an inner surface of a light weight part of a tire 10 placed on a cradle 9 by making the paste layer of the material 11 down is pressed and heated by a hot plate 12 for adherence. With this constitution, retainability of the component material being used is improved and it is easily removed off at the lower layer 7 part whose tensile strength is low.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a correction member used for correcting the weight balance of tires of aircraft, etc.

When the tread of an aircraft tire wears down to a certain thickness during takeoff and landing, it is reused by removing the worn tread with a puff and replacing it with a new tread layer. It is generally said that this method can be reused 5 to 6 times, but since replacing the new tread layer will disrupt the overall weight balance of the tire, it is necessary to readjust the balance by some method. It was necessary to do it.

The methods conventionally employed to correct this balance are as follows.

(1) A method of kneading crystalline neopreno rubber and lead powder using a solvent such as hexane, adhering this to the inner liner layer 1, and vaporizing the solvent to form a solidified product 2 (FIG. 1).

(2) A method in which a rubber material 3 with a high specific gravity is adhered to the inner liner layer 1 via a solution layer 4, and then partially vulcanized and solidified (FIG. 2).

(3) A method of gluing a weight 5 such as a lead plate or sand bag to the inner liner layer 1 (Fig. 3).

However, in methods (1) and (2) above, it is necessary to scrape off the correction rubber mixture once fixed using a puff or the like during the next correction, but this removal work is not necessarily easy. During the removal process, the inner liner layer is easily damaged, which is a major cause of defects in cranks and the like. Furthermore, the method (3) above has a problem in that the weights may peel off or move during running.

The present invention has been made in view of the above circumstances, and provides a weight imbalance correction member that can be reliably held during use and can be easily removed during re-adjustment, and will be described below.

In this invention, the weight balance correction member is provided in an upper layer material made of a high specific gravity rubber composition, a lower layer material made of a rubber composition with low tensile strength, and a lower surface portion of the lower layer material. It has a glue layer.

One embodiment of this weight variation correction member is schematically shown in FIG. A lower layer material 7 is provided, and a glue layer 8 is provided below the lower layer material 7. It is preferable to use a rubber composition with a specific gravity of 1.5 or more as the upper layer material 6, and it is preferable to use a rubber composition with a tensile strength of 1 to 100 Kf/- as the lower layer material 7. If the specific gravity of the upper layer material 6 is too low, it will not function sufficiently as a weight for lance correction.Also, if the tensile strength of the lower layer material 7 is less than lKf/i, the impact during running will There is a risk of peeling off, 4 out of 100
10I! If it is larger, it will be difficult to pull it off during re-adjustment, which is not preferable. Preferred blending examples of the upper layer material 6 and lower layer material 7 used in the present invention are shown in Table 1.

Note to Table 1) * The thickness (Ll) of the zinc diethyldithiocarbamate upper layer material 6 is preferably about 2 to 10 degrees. material 6 may be formed. In this case, the composition of the plate materials may be different. The thickness (2) of the lower layer material 7 is preferably about 0.5 to 15 u, more preferably about 1 u. The lower layer material 7 can also be made of a composite material if necessary. Note that as the material for the glue 1i8, a rubber adhesive having appropriate strength, such as rubber dissolved in a solvent, can be used. Further, the shape and dimensions of the single weight balance correction member may be appropriately selected depending on the conditions of use.

When using the weight balance correction member according to the present invention, for example, as shown in FIG.
The weight balance correction member 11 is placed on the adhesive layer 8, and is heated and pressurized using a pressure device 13 equipped with a hot plate 12 at the tip to fix it to the tire 10i. good. The work of fixing the weight error correction member 11 to the tire 1o is simple.

As explained above, the weight balance correction member according to the present invention has an upper layer material with high specific gravity, so it has a high weight balance correction ability, and a lower layer material with low tensile strength is provided below the upper layer material. Therefore, it is easy to remove when re-editing. In other words, compressive force mainly acts on the correction member attached to the inner surface of the tire's inner liner during driving due to the action of centrifugal force caused by the rotation of the tire, and almost no tensile force or shear force is applied. Therefore, even if there is an underlying material with low tensile strength, there is no risk of it being peeled off, or it can be easily peeled off from the underlying material with low tensile strength during reconditioning.

In this way, the combination of the upper layer material with high specific gravity and the lower layer material with low tensile strength results in an extremely slanted member for correcting weight balance. It is clear that this weight Balanos correction member can be used not only for aircraft tires, but also for trucks, buses, civil engineering vehicles, and the like.

[BRIEF DESCRIPTION OF THE DRAWINGS] FIGS. 1, 2, and 3 are explanatory diagrams of the conventional weight balance correction method, FIG. 4 is an explanatory diagram of the structure of the weight balance correction member according to the present invention, and FIG. The figure is an explanatory diagram showing how to use it. 1. Isonar liner single layer, 2.. Solidified material, 3.. Rubber material, 4.. Solution layer, 5.. Weight, 6.. Upper layer material, 7. Lower layer material, 8.. Glue layer, 9. - Pedestal, 10... Tire, 11... Weight balance correction member, 12 Heat plate. Patent Applicant Sumitomo Rubber Industries Co., Ltd. Agent Patent Attorney Hiroshi Sugawara Figure 1 Figure 2 Figure 3 Figure 4 Figure 51.1

Claims (2)

[Claims] (1) A tire comprising an upper layer material made of a high specific gravity rubber composition, a lower layer material made of a rubber composition with low tensile strength, and a glue layer provided on the lower surface of the lower layer material. A component for correcting weight balance. (2) The member for correcting the weight balance of a tire according to claim 1, wherein the specific gravity of the upper layer material is 1.5 or more (3)
The member for correcting the weight balance of a tire according to claim 1 or 2, wherein the lower layer material has a tensile strength of 1 to 100 kg/i.