Single lay steel cord for elastomer reinforcement

A technology of elastomers and steel ropes, which is applied in the field of single-twist steel ropes reinforced with elastomers, and can solve problems such as sequential fractures

Active Publication Date: 2009-11-04
BEKAERT ADVANCED CORDS AALTER NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] 1. Cost issues
[0015] 2. Size problem
[0016] 3. Core migration problem
[0017] 4. Sequence break problem
[0018] 5. Mechanical anchoring problem

Method used

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  • Single lay steel cord for elastomer reinforcement
  • Single lay steel cord for elastomer reinforcement
  • Single lay steel cord for elastomer reinforcement

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0049] The original scheme for providing a low-cost alternative is to utilize 1|3×N-type constructions, such as d 0 +(5×d 1 |5×d 2 |5×d 3 ), as described in EP 1474566, where the core filament diameter d 0 small enough to be located with diameter d 1 The center of the 5 first-layer filaments. with diameter d 2 and d 3The filaments form the second layer surrounding the first layer. The filaments between the brackets are assembled together with a single twist in one operation. A vertical bar "|" separates filaments that lie on different rings relative to the center of the circle when "regularly arranged". A "regular" arrangement means that the centers of the filaments of the first layer lie on a regular "N-gon", where N is the number of filaments in the layer. The filaments of the second layer are adjacent to the two filaments in the first layer in the slit formed by the filaments of the first layer, and are arranged according to the circumferential direction when they ...

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Abstract

The present invention discloses a steel cord (200) that is simple and cost effective to produce while solving some particular problems for the reinforcement of elastomer belts such as timing belts or the like. The cord (200) is a single lay cord that comprises a core filament (202), around which a first layer and a second layer of filaments (204, 210, 212) is twisted, all filaments being twisted with the same lay length and direction. By appropriate choice of the lay length, the core filament diameter and the filament diameters of the first layer - the latter being larger or equal to the former - an aggregate gap can form in which intermittently a filament (210') of the second layer gets entrained. This aggregate gap must be between 40 and 70 % of the core filament diameter in order to obtain the desired effect of having a core filament (202) that is deformed with the same lay length and direction as the other filaments (204,210,212). A deformed core filament (202) suppresses the effect of core filament migration. In addition the exceptional rough aspect of the cord (200) leads to good mechanical anchorage in the elastomer. Also the load exerted on the cord (200) is better distributed over all filaments. The use of the cord is not limited to timing belts: an advantageous use of the cord in tyres, hoses, hoisting belts, drive belts and reinforcing strips is anticipated.

Description

technical field [0001] The present invention relates to an easy-to-manufacture and effective steel cord particularly suitable for reinforcement applications, wherein said reinforcement is subjected to repeated cycles of pulling when said reinforcement is embedded in an elastomer. Background technique [0002] At present, timing belts—also known in the art as "toothed belts" or "drive belts" or "timing belts"—are no longer uniquely found in machines (they are reserved here due to the precision and high-power transmission movement). favored), but also in everyday applications such as garage door openers or sliding doors. They are preferred over traditional cable or chain systems for their quiet operation. In these systems, however, the belt is relatively gently loaded in terms of force and speed, so issues such as overall system price and durability become more important. [0003] However—at least for timing belts reinforced with steel cables—often the stranded cables used i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D07B1/06D07B7/02
CPCD07B7/025D07B2201/2059D07B1/062D07B2201/2023D07B2201/204D07B2201/2051D07B2501/2076D07B2201/2006Y10T428/249922D07B2801/12D07B1/06D07B1/08D07B1/12
Inventor H·罗梅尔B·范德贝肯
Owner BEKAERT ADVANCED CORDS AALTER NV
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