DD272358A1 - METHOD FOR DETERMINING THE DISTRIBUTION OF NORMAL AND RUBBER MATCH IN THE COMPOSITE BODY OF THE TIRE - Google Patents

Abstract

The invention relates to a method for determining the distribution of cord and rubber compound in Verbundkoerper the tire through which material savings while maintaining quality are possible. In this case, the required amount of material used is determined by a suitable Pruefverfahren. According to the invention, the rubber bands between the individual carcass plies, as well as between the plies of a ply, are determined, wherein the tire samples are embedded in a suitable hardening agent, such as polyester resin, and cuts are made with a rotating knife after hardening. Then the rubber pads are determined by microscope.

Description

APPLICATION OF THE INVENTION The invention relates to a method for determining the distribution of cord and bead mass in the composite body of the tire.

Characteristic of the known state of the art For the minimally required QummibrOeke, a theoretical value is added based on experience values. In order to be able to determine the rubber pressures actually present in the tire, it is necessary to develop a suitable measuring technique. It is important to ensure that no defects in the measurement results (for example due to weathering, crushing or the like during cutting) are tolerated.

Known from the textile industry as · embedding of fat in means (eg hane) for producing oilskins and cross-sectional determination.

Object of the invention

Aim of the Invention It is the development of a method for determining the swastika of corduroy and rubbery material in the body of the tire, by which it is possible to achieve material savings of good quality.

Explanation of the essence of the invention

The object of the invention lat it, a method for the determination of Ve. To develop cord and rubber roll In rolls in which the required amount of mat of rubber matting can be handled by a suitable test method. According to the invention, the object is achieved by providing for the determination of the parts) g of cord and rubber males in the tire. By determining the rubber bridges between the individual carcass plies and between the plies in a single layer, the samples taken from a tire are cut into a suitable means, in particular polyester resin, and embedded, and after being cut on a special cutter with a rotating knife The Qummibrots can be precisely determined with the help of a microacop.

Autföhrungabelaplel

The invention will be erlutert below to a Ausführungsibelsplel nlher.

From a tire of dimension 12.8-20.10 PR, K 31 (consisting of β carcass plies with a lining thickness of 1.28 mm each) z - 48 * samples are taken in the area of the cord thread angle. In this area, the value for the vertical accumulator blocks goes through a minimum.

These samples are embedded in a two-component resin whose basic materials are esters of methacrylic acid. After authlaving, cuts are made from this with a rotating knife on a special insert. With the help of a microscope, the vertical QummibrOcken are determined. For a number of n - 482 measured QummibrOcks an average value of H - 0.28 mm results. The minimum value for the vertical QummibrOeke is 0.10mm, resulting in a reduction of the layer thicknesses. For Nachwelsführung the pad disc is reduced from 1.28mm to 1.18mm in one attempt. A re - measurement of the rubber blocks shows a value of R - 0,24mm at n - 484. A rubber thickness reduction of 0,10mm therefore results in a reduction of the vertical rubber balance of 0,04 mm in the tire.

The method for determining the cord and Qummlmasse in the composite body of the Rolfen · it is possible to save Qummimaterial without quality losses occur.

Claims (1)

-1-272398 Claim: Procedure for determining the distribution of cord and rubber mat In the composite body of the tire, characterized in that the rubber bridges between the individual carcass plies and between the plies of a ply are determined, the samples taken from a tire being in a suitable hardening agent, in particular polycetane They are to be bedded and, after the authorship, cuts are made on a special cutting device with a rotating knife and the rubber bridges are precisely determined by means of a microtextop. Field of application of the invention The invention relates to a method for determining the distribution of cord and rubber in the composite body of the tire. Characteristic of the state of the art For dl · minimally necessary · rubber stamp · is set to theoretical value based on experience values. In order to determine the rubber bridges actually present in the tire, it is necessary to develop a suitable measuring method. It is important to ensure that there are no distortions in the results of the measurements (for example, by displacements, cuts, and / or cutting). Known also for textile industry as embedding of fat in neglecting means (eg hard) turn making of ski pistes and cross-sectional determination. Object of the invention Aim of the invention is the development of a method of determining the defense of cord and quill mass in the composite body of the tire, by which material savings with constant quality are possible. Presentation of the essence of invention The object of the invention is, in the case of the investigator, the Ve. division of cord and rubber In tire work, in which a suitable test method can be used to determine the required amount of matting of rubber. According to the invention, the object is achieved by providing a determination of the distribution of corduroy and rubber in the tire, by determining the rubber straps between the sheets of a sheet and with the sheets of a sheet taken from a tire suitable curing agent, in particular Polyester hard, are embedded and after cutting on a speilellen cutting device with a rotating knife cuts are made and the Qummibrücken with help «ein ·· microscope · exactly determined. AusfflhrungsbelspleJ Dk invention will be explained below to an Ausführungsbelsptel nlher. From a tire with the dimension 12.5-20.10 PR ₁ K 31 (consisting of β carcass plies with a pad thickness of 1.25 mm in each case) samples are taken in the area of the cord thread angle ι-45 '. In this area, the value for dl · vertical gumm bridges passes through «In Minimum. These samples are embedded in a Zweikomponentenhan whose base are · esters of methacrylic acid. After the authirten, cuts are produced from this with a rotating knife on a special speeding device. The vertical rubber bridges are determined by means of a microscope. For a number of η - 482 measured rubber bridges results in • I «in the mean value of S - 0,28 mm. Al · minimum value for the vertical rubber bridge is set to 0.10 mm, resulting in a reduction of the layer thicknesses. To demonstrate this, the pad disc is reduced from 1.25 mm to 1.15 mm in one test. A new measurement of the rubber bridges shows a value of R -0.24 mm at η-494. A lining thickness reduction of 0.10 mm thus results in a reduction of the vertical rubber bridge in the tire by 0.04 mm. The method for determining the cord and rubber mass in the composite body of the Roifens makes it possible to save on rubber material without causing loss of quality.