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测量输送机皮带的硬度
日期:【2017-05-08 10:08】 共阅:【】次

标题:测量输送机皮带的硬度

 

Durometer is one of several measures of the hardness of a material. It can be identified as a material’s resistance to permanent indentation or it can be identified as a material’s resistance to penetration of a sharp object.

硬度计是一种测量材质硬度的设备。硬度可以被定义为一种材料抵抗持续挤压的能力或者抵抗尖锐物品穿透其表面的能力。

 

Durometer measures the depth of an indentation in the material created by a given force. Ideally, the material under test should be a minimum of 6.4mm or .25 inches to ensure accuracy.

硬度计用来测量一个给定力作用在材质表面所形成的凹陷深度。理论上,被测试的材料应最小6.4mm0.25英寸以保证准确性。

 

The term durometer is often used to refer to the measurement as well as the instrument itself.

术语“硬度计”通常是指一种测量方法,也是指其测量设备本身。

    

The durometer scale was defined by Albert F. Shore, who developed a measurement device to measure Shore hardness in the 1920s.

硬度级别Albert F. Shore定义,他在20世纪20年代发明出一种用来度量肖氏硬度的测量设备。

 

Durometer is typically used as a measure of hardness in polymers, elastomers and rubbers. When measuring the hardness of polymer, elastomer or rubber in a conveyor belt, it is very important to ensure that the measurement device is only penetrating the material being tested. If the penetration contacts the strength member (fabric) of the belt, it will not be measuring the elastomer, polymer or rubber. So, whenever possible the test should be done from the side of the belt, penetrating horizontally.

硬度计专门用于聚合物、弹性体和橡胶的硬度测量。当测量输送机皮带中聚合物、弹性体和橡胶的硬度时,保证测量设备只穿过被测试的材料是非常重要的。如果穿透过程中接触了皮带的强力部分(织物),那么这就不是测量弹性体、聚合物或者橡胶了。因此,无论何时,都应从皮带的一侧水平穿刺进行检测。

    

The ASTM D2240-00 testing standard calls for a total of 12 scales: types A, B, C, D, DO, E, M, O, OO, OOO, OOO-S and R. Each scale results in a value between 0 and 100, with higher values indicating a harder material. The two most common scales are type A (Shore A) and type D (Shore D).

ASTM D2240-00测试标准一共要求了12个等级:A, B, C, D, DO, E, M, O, OO, OOO, OOO-S R。每个等级数值从0100,数值越高,材料越坚硬。最常见的两种硬度级别是A(肖氏A)和D(肖氏D)。

 

For polymers, elastomers and rubbers used in conveyor belting, the most common scale is type A (Shore A).

对于用在输送机皮带中的聚合物,弹性体和橡胶来说,最常见的硬度等级为A(肖氏A

 

Material Durometer Scale材质硬度等级

Material    材质

Durometer   硬度

Scale 等级

Bicycle Gel Seat  自行车胶座

+/- 25

OO

Chewing Gum  口香糖

+/- 20

OO

Rubber Band  橡胶圈

+/- 25

A

Door Seal  车门密封条

+/- 55

A

SBR rubber in belting  丁苯橡胶带

+/- 60

A

Automotive tire tread  汽车轮胎胎面

+/- 60

A

PVC (thermoplastic) in belting  聚氯乙烯(热塑性)

+/- 70

A

Soft wheels of roller skates  溜冰鞋的软轮

+/- 78

A

Polyurethane (PU) in belting  聚氨酯(PU)

+/- 90

A

Hard wheels of skateboard  滑板硬轮

+/- 98

A

Solid truck tires  实心卡车轮胎

+/- 50

D

Hard Hat (typically HDPE)  安全帽(典型为HDPE)

+/- 75

D


In conveying applications, the durometer or hardness of the polymer, elastomer or rubber surface of the conveyor belt is particularly relevant to:

在输送机应用中,输送机皮带的聚合物,弹性体或者橡胶的表面硬度与以下方面尤为相关:

 

The flexibility of the conveyor belt over the end rollers  端辊上输送机皮带的灵活性、伸缩性

The coefficient of friction (COF) of the surface  表面的摩擦系数

Essentially, a lower/softer durometer will be more flexible and will have a higher COF. A higher/harder durometer will be less flexible and will have a lower COF.

本质上讲,低硬度或者较柔软的材质具有更大的灵活性、可塑性,且具备更大的摩擦系数。高硬度或者较坚硬的材质可塑性差,摩擦系数低。

 

CAUTION: Do not draw an assumption regarding conveyor belts that a higher durometer is generally better or worse than a lower durometer. It all depends on the conveying application and other characteristics of the belt. (i.e. oil resistance, abrasion resistance, etc.).

 

注意:不要假设认为硬度越高的输送机皮带品质就越好,或认为硬度越低的皮带品质就越差。具体情况要根据输送机的具体应用领域以及皮带的其他特性。(也就是,耐油性,抗磨损性等等。)

 

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