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如何正确选购邵氏硬度计-邵氏硬度计选购指南

发布时间:2022-04-29 08:26:18人气:
邵氏硬度计广泛使用于橡胶行业,所以被称为橡胶硬度计。目前市场上,邵氏硬度计只有指针式和数显式两种结构,结合其常用分类的A型、C型、D型3种,组合起来选择性很多。

    在这众多的选择中,如何正确选购邵氏硬度计呢?

如何正确选购邵氏硬度计-邵氏硬度计选购指南(图1)

不同的型号可以应用检测到不同的产品,在选购时须知以下几点:

    1、根据性能参数选择

    邵氏硬度计的主要参数为:

    a、刻度盘值

    b、压针行程范围

    c、压针端部压力

    d、压针顶端直径

    根据这参数来选择自己所需的型号,比如,压针的行程范围在0-0.1mm,如果产品的硬度值超出了数值,就不能选择此类型号的硬度计。


    2、根据行业需求选择

    一般情况下,指针式和数显式两种结构都适用于橡胶行业的产品检测,但是不同的型号硬度计有不同的优势。比如邵氏C型硬度计,是测定压缩率为50%时应力为0.5kg/c㎡以上的含有发泡济制成的橡塑微孔材料硬度,也可用于类似硬度的其他材料。而邵氏D型硬度计,适用于一般硬橡胶、硬树脂、压克力、玻璃、热塑性塑胶、印刷板、纤维等高硬度材料的硬度测试。根据行业的需求选择合适的型号,是非常重要的。

    3、根据生产厂家服务质量选择

    有的小型的硬度计生产厂家,技术并不到位,检测的硬度值也许不会准确,我们在选择时,可以把针头顶在平滑干净的玻璃上,如果所显示的数值为100,那么,这只硬度计就是准确的。另外,也可以手持硬度计,平压于试样(或试件)上,直到硬度计底面与试样完全接触为止,这时指针所指刻度即为试样的硬度值,为稳定测定条件,提高测定精度,应将硬度计装置在同型号定负荷测定架上。每次测定均应在不同的位置上选择测定三点,取其算术平均值。如果数值稳定,即可硬度精确。除了硬度计本身技术服务外,还有重要的就是生产厂家的售后服务

使用注意事项:
1).测试样块厚度必须大于6mm,层数不多于3层,测试面积大于或等于压足。
2).测试次数为三次,测试结果为这三次的平均值。
3).当试样用A型硬度计测量值超过90度时,推荐使用D型硬度计,当D型硬度计测量值低于20度时,推荐用A型硬度计。A型硬度计示值低于10度时是不准确的,测量结果不能使用。
邵氏硬度计在使用完毕后,应擦净装入仪器盒内,放置干燥处,防止受潮。


Thao hardness tester is widely used in rubber industry, so it is called rubber hardness tester. Currently on the market, Shore hardness tester only pointer type and digital display two structures, combined with its common classification of type A, TYPE C, TYPE D 3, combination of A lot of selectivity.

In this many choices, how to correctly choose Shore hardness tester?

Different models can be used to detect different products, in the purchase of the following points:

1. Select according to the performance parameters

The main parameters of Shore hardness tester are:

A. Dial value

B. Travel range of pressing needle

C. Pressure at the end of the needle

D. Diameter of the top of the pressure needle

Choose the type you need according to this parameter. For example, the travel range of the indenter is 0-0.1mm. If the hardness value of the product exceeds the value, you cannot choose this type of durometer.

2. Choose according to industry demand

In general, both pointer and digital display structures are suitable for product testing in the rubber industry, but different types of hardness tester have different advantages. For example, Shaw C hardness tester, is to determine the compression rate of 50% when the stress is 0.5kg/ C square meters containing foam made of rubber and plastic microporous material hardness, can also be used for similar hardness of other materials. Shaw D hardness tester is suitable for hardness testing of general hard rubber, hard resin, acrylic, glass, thermoplastic plastic, printing board, fiber and other high hardness materials. It is very important to choose the right model according to the needs of the industry.

3. Choose according to the service quality of the manufacturer

Some small hardness tester manufacturers, the technology is not in place, the hardness value may not be accurate, when we choose, we can put the needle head on the smooth and clean glass, if the value displayed is 100, then the hardness tester is accurate. In addition, you can also hold the hardness tester, flat pressure on the sample (or specimen), until the bottom surface of the hardness tester and the sample are in complete contact, then the scale indicated by the pointer is the hardness value of the sample, in order to stabilize the determination conditions, improve the determination accuracy, the hardness tester should be installed in the same model fixed load determination frame. Three points should be selected at different positions for each measurement and their arithmetic mean value should be taken. If the value is stable, the hardness is accurate. In addition to the hardness tester itself technical services, there is an important after-sales service manufacturers

Precautions for use:

1). The thickness of the test sample shall be greater than 6mm, the number of layers shall not be more than 3 layers, and the test area shall be greater than or equal to the pressure foot.

2). The number of tests is three times, and the test result is the average of these three times.

3). When the sample is measured by type A hardness tester over 90 degrees, type D hardness tester is recommended; when the value measured by type D hardness tester is below 20 degrees, Type A hardness tester is recommended. The type A hardness tester is inaccurate when the value is below 10 degrees and the measurement result cannot be used. Shore hardness tester should be cleaned and put into the instrument box after use, and placed in a dry place to prevent dampness.




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