Introduction: HYL-1001 multi-functional powder physical properties tester is based on the United States ASTM D6393-99 standard (Standard Test Method for Bulk Solids Characterization by Carr Indices) requirements, and with reference to China's national standard GB / T 5162-2006 / ISO 3953 : 1993 (Determination of metal powder tap density), GB / T 1482-2010 (Determination of fluidity of metal powders by standard funnel method), GB / T 1479.1-2010 (Bulk metal powder density - Funnel method), GB / T 16913.3-2008 (Determination of bulk density of natural stacking method) the provisions of the main technical indicators, developed for the evaluation of a comprehensive physical properties of powder testing equipment. Because the powder is in a stationary state or a fluid state, it is a two-phase system. The characteristics of the particles themselves and the mutual friction between the particles will produce some special flow characteristics. It is of great significance to study these characteristics on the work of powder processing, conveying, packaging and storage. The instrument is characterized by a multi-purpose machine, flexible and diverse measurement conditions, easy to operate, repeatable, suitable for a variety of standards. The successful development of this instrument has provided a new method for evaluating the comprehensive testing of the properties of powders in fields such as scientific research and industrial production. The instrument can directly test the items including the tap density, loose (stacking) density, angle of repose, collapse angle, slab angle, dispersion and other parameters, through the calculation of the test data can be obtained by the differential angle, compression, clearance Rate, uniformity, cohesion and other indicators, but also through the above-mentioned parameters look-up table flow index, jet index and other Carr index parameters. Determination and calculation of the definition of the project Determination of the definition of the project: 1. tap density: tap density refers to the powder loaded in a specific container, under certain conditions, the container to vibrate, thereby undermining the powder in the gap, so that the powder in a tightly packed state density, under normal circumstances The tap density of the powder is less than the true density of the single particles in the powder. HYL-1001 multi-functional powder physical properties tester provides the United States ASTM D6393-99 standard (Karl Index) in the determination of the tap density and the national standard (Determination of metal powder tap density) GB / T 5162-2006 / ISO953: 1993 Determination of tap density method. 2. Loaded density: Loose density refers to the density of the powder filled with a specific container under the specified conditions. When testing loose density, no additional vibration or other external force should be applied. This indicator is important for the design of storage containers and bags. HYL-1001-type multi-function powder physical properties tester provides three different ways of determining the standard: A. United States ASTM D6393-99 standard (Karl Index) Determination of bulk density; B. National Standard GB 1479-2010 (metal powder bulk density - funnel method); C. GB / T 16913.3-2008 (Determination of loosened natural stacking method) Determination of bulk density. 3. Angle of repose: The free surface of the powder accumulation layer, in the static equilibrium, the maximum angle formed with the horizontal plane is called the angle of repose. It is through a specific way to make the powder naturally fall to a specific platform formed. The angle of repose has the greatest influence on the fluidity of the powder. The smaller the angle of repose, the better the fluidity of the powder. Repose angle, also known as the angle of rest, natural slope angle. HYL-1001 multi-function powder physical properties tester provides the United States ASTM D6393-99 standard (Karl Index) specified in the determination of the method. 4. Crash angle: to measure the angle of repose of the accumulation of powder with a certain impact, so that the collapse of the surface, the remaining cone of powder cone called the collapse angle. HYL-1001 multi-function powder physical properties tester provides the United States ASTM D6393-99 standard (Karl Index) specified in the determination of the method. 5. Flat angle (Trowel angle): the plate will be buried in the powder up vertical lift, the powder in the flat surface of the free surface (bevel) and the angle between the plate and the vibration angle after the average Called flat angle. In the actual measurement process, the plate angle is based on the angle of the plate after lifting and flat plate by removing the impact of unstable powder after the average angle to represent. The smaller the flat angle, the stronger the fluidity of the powder. In general, the slab angle is greater than the angle of repose. HYL-1001 multi-function powder physical properties tester provides the United States ASTM D6393-99 standard (Karl Index) specified in the determination of the method. 6. Dispersion: is to measure the powder dispersed in all directions, jet or fluidized ability is called dispersion. The method of measurement is to measure the percentage of specimens outside the sample trays to the total number of specimens after dropping 10 grams of the specimens from a certain height. Dispersion and dispersion of the sample, floating and splashing related. If the degree of dispersion exceeds 50%, the sample has a strong splashing tendency. HYL-1001 multi-function powder physical properties tester provides the United States ASTM D6393-99 standard (Karl Index) specified in the determination of the method. Calculation of the definition of the project: 1. The difference angle: the angle between the angle of repose and the collapse angle is called the difference angle. The greater the difference, the stronger the fluidity and jet flow of the powder. Compression: the same sample of the tap density and loose density density and tap density ratio of compression. Compression is also called compression ratio. The smaller the degree of compression, the better the fluidity of the powder. 3. Voidage: Voidage refers to the percentage of the void in the powder as a whole volume of the powder. The porosity varies depending on factors such as particle shape, arrangement structure and particle size of the powder. When the particles are spherical, the porosity of the powder is about 40%; when the particles are ultrafine or irregular, the porosity of the powder is 70-80% or more. 4. Agglutination degree: Aggregation degree is the size of mutual cohesion of the surface of the powder particles. Generally dry powder agglomeration is small. 5. Homogeneity: powder agglutination is another manifestation of powder agglomeration in the powder can not be measured, the use of uniformity to represent the size of powder cohesion. 6. Liquidity Index: The liquidity index is calculated by Carr in the United Kingdom in the 1960s. After measuring a large amount of powder, he quantified qualitative concepts in a way similar to the method of bisecting in fuzzy mathematics. Briefly, the liquidity index is the weighted sum of the indices of angle of repose, compression, slab angle, homogeneity, agglutination, and so on. Sprayability index: It is a measure of the difficulty of the powder material to produce an indicator of dust, but also a measure of how easy the powder liquid gas liquefied a way. Spurting strong powder easy to produce dust, but also easy to be liquefied. Jet index Jet index is fluidity index, crash angle, difference angle, dispersion index of four physical index.
Introduction: HYL-1001 multi-functional powder physical properties tester is based on the United States ASTM D6393-99 standard (Standard Test Method for Bulk Solids Characterization by Carr Indices) requirements, and with reference to China's national standard GB / T 5162-2006 / ISO 3953 : 1993 (Determination of metal powder tap density), GB / T 1482-2010 (Determination of fluidity of metal powders by standard funnel method), GB / T 1479.1-2010 (Bulk metal powder density - Funnel method), GB / T 16913.3-2008 (Determination of bulk density of natural stacking method) the provisions of the main technical indicators, developed for the evaluation of a comprehensive physical properties of powder testing equipment. Because the powder is in a stationary state or a fluid state, it is a two-phase system. The characteristics of the particles themselves and the mutual friction between the particles will produce some special flow characteristics. It is of great significance to study these characteristics on the work of powder processing, conveying, packaging and storage. The instrument is characterized by a multi-purpose machine, flexible and diverse measurement conditions, easy to operate, repeatable, suitable for a variety of standards. The successful development of this instrument has provided a new method for evaluating the comprehensive testing of the properties of powders in fields such as scientific research and industrial production. The instrument can directly test the items including the tap density, loose (stacking) density, angle of repose, collapse angle, slab angle, dispersion and other parameters, through the calculation of the test data can be obtained by the differential angle, compression, clearance Rate, uniformity, cohesion and other indicators, but also through the above-mentioned parameters look-up table flow index, jet index and other Carr index parameters.
