在這眾多的選擇中，如何正確選購邵氏硬度計呢？
不同的型號可以應(yīng)用檢測到不同的產(chǎn)品，在選購時須知以下幾點(diǎn)：
1、根據(jù)性能參數(shù)選擇
邵氏硬度計的主要參數(shù)為：
a、刻度盤值
b、壓針行程范圍
c、壓針端部壓力
d、壓針頂端直徑
根據(jù)這參數(shù)來選擇自己所需的型號，比如，壓針的行程范圍在0-0.1mm，如果產(chǎn)品的硬度值超出了數(shù)值，就不能選擇此類型號的硬度計。
2、根據(jù)行業(yè)需求選擇
一般情況下，指針式和數(shù)顯式兩種結(jié)構(gòu)都適用于橡膠行業(yè)的產(chǎn)品檢測，但是不同的型號硬度計有不同的優(yōu)勢。比如邵氏C型硬度計，是測定壓縮率為50%時應(yīng)力為0.5kg/c㎡以上的含有發(fā)泡濟(jì)制成的橡塑微孔材料硬度，也可用于類似硬度的其他材料。而邵氏D型硬度計，適用于一般硬橡膠、硬樹脂、壓克力、玻璃、熱塑性塑膠、印刷板、纖維等高硬度材料的硬度測試。根據(jù)行業(yè)的需求選擇合適的型號，是非常重要的。
3、根據(jù)生產(chǎn)廠家服務(wù)質(zhì)量選擇
有的小型的硬度計生產(chǎn)廠家，技術(shù)并不到位，檢測的硬度值也許不會準(zhǔn)確，我們在選擇時，可以把針頭頂在平滑干凈的玻璃上，如果所顯示的數(shù)值為100，那么，這只硬度計就是準(zhǔn)確的。另外，也可以手持硬度計，平壓于試樣(或試件)上，直到硬度計底面與試樣完全接觸為止，這時指針?biāo)缚潭燃礊樵嚇拥挠捕戎担瑸榉€(wěn)定測定條件，提高測定精度，應(yīng)將硬度計裝置在同型號定負(fù)荷測定架上。每次測定均應(yīng)在不同的位置上選擇測定三點(diǎn)，取其算術(shù)平均值。如果數(shù)值穩(wěn)定，即可硬度精確。除了硬度計本身技術(shù)服務(wù)外，還有重要的就是生產(chǎn)廠家的售后服務(wù)
使用注意事項：
1).測試樣塊厚度必須大于6mm,層數(shù)不多于3層，測試面積大于或等于壓足。
2).測試次數(shù)為三次，測試結(jié)果為這三次的平均值。
3).當(dāng)試樣用A型硬度計測量值超過90度時，推薦使用D型硬度計，當(dāng)D型硬度計測量值低于20度時，推薦用A型硬度計。A型硬度計示值低于10度時是不準(zhǔn)確的，測量結(jié)果不能使用。邵氏硬度計在使用完畢后，應(yīng)擦凈裝入儀器盒內(nèi)，放置干燥處，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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