Standard and method of testing for plastic tensile testing machine

According to user requirements, a plastic tensile testing machine can measure various mechanical properties of both metallic and non-metallic materials. For non-metallic materials, it provides data on maximum strength, elastic modulus (E), constant compressive strength, constant load elongation, yield strength, and other related parameters. For metallic materials, it measures yield strength, non-proportional strength, total compressive strength, tensile strength, and elongation. These tests are essential for material evaluation and design processes. The test standard for plastic tensile testing is GB/T 9341-2000, which outlines detailed procedures for conducting the test. This standard is widely used in industries to ensure consistent and reliable results. The bending test, another important method, is primarily used to assess how materials perform under bending loads. It helps evaluate the bending strength and ductility of materials, making it a crucial factor in quality control and application design. GB/T 9341-2000 specifies the exact steps and conditions for the test, ensuring accuracy and reproducibility. This standard applies to a wide range of materials, including thermoplastic molded and extruded products, such as filled or unfilled rigid sheets, as well as thermoset molded sheets and laminates. It also covers fiber-reinforced composites made from unidirectional or non-unidirectional fibers, such as woven rovings, chopped strands, and hybrid reinforcements. Additionally, it includes thermotropic liquid crystal polymer prepreg sheets. The configuration of a plastic tensile testing machine typically includes a sample preparation unit that produces standardized samples for accurate testing. The main testing device is often a desktop electronic universal testing machine, such as the HY-0580 model. Accessories like three-point bending fixtures are used to evaluate rigid and semi-rigid materials effectively. When setting up the test, the support span of the sample is closely related to its thickness. Therefore, it’s important to know the sample size range before selecting the appropriate fixture. Different standards may require different sizes of the loading indenter and base, so consulting the relevant standard is recommended. For three-point bending tests, it's not advisable to use beam displacement to measure deflection. Instead, a linear encoder or resistance strain gauge is used to directly measure the deformation and strain. This ensures more precise and reliable results. For more information on standards and testing methods, visit: http://news.chinawj.com.cn Editor: Hardware Business Network Information Center http://news.chinawj.com.cn

Diesel Water Pump

Diesel Engine water pump is a common industrial equipment, which is widely used in agriculture, construction, engineering, fire protection and other fields. Its main function is to convert the power generated by the diesel engine into the power of water, so as to realize the delivery and supply of water. This article will introduce the working principle, structural characteristics, application fields and maintenance of diesel engine water pump.

The working principle of the diesel engine water pump is to use the power generated by the combustion capacity of the diesel engine to transmit the power to the water pump through the connecting rod mechanism, so as to drive the water pump to work. The working process of diesel engine water pump can be divided into three stages: water absorption, water pressure and drainage. In the suction stage, the diesel engine generates negative pressure through the up and down movement of the piston to draw water from the water source into the water inlet of the water pump; in the pressurized water stage, the piston of the diesel engine moves upwards to press the water into the pressurized water chamber of the water pump; in the drainage stage, the piston of the diesel engine moves downward to discharge the water from the outlet of the water pump.

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