Angle of repose tester – Applications:

The Angle of Discharge Tester is a precise slope angle gauge to determine the angle of repose of powders and granules and powder-like samples.

The determination of angle of repose takes place by flowing a powder sample through the flow funnel. The powder sample flows through the flow funnel onto the powder sample platform and forms a cone of powder. The measurement of the diameter and the height of the cone of powder calculates the angle of repose. The angle of repose is a measure of the flow behavior of powder samples. A smaller angle of repose points to a better one flow behavior Add the powder sample.

This precision-machined slope angle apparatus for measuring the flow behavior of powder samples is suitable for determining the flow behavior of a wide variety of powders and similar samples, including metallic powders, ceramic powders, pharmaceutical powders, and much more.

The angle of repose, too A Place of Peace ... is an important parameter in process engineering, particularly in the Powder and bulk solids technology. He describes the maximum angle at which a bulk material can be piled up on a flat surface without slipping.

A) Why is the angle of repose important?

i) Process optimization: Dosage: The angle of repose influences the dosing accuracy of bulk materials in containers or during conveying processes.
(ii) Storage: It provides information on the stability of bulk material piles and helps minimize the risk of slippage.
iii) Funding: The angle of repose is important for selecting appropriate conveying equipment (e.g., belts, screw conveyors).
iv) Product Development: Formulation, by measuring the angle of repose, formulations can be optimized to improve the flow behavior of products.
v) Quality Assurance: Consistency: The angle of repose serves as a quality parameter for assessing the consistency of products.

B) How does the angle of repose test setup work?

This professional Angle of Discharge Test Setup consists of:

i) Precision-engineered funnel: A high-quality, precision-engineered stainless steel funnel through which the bulk material flows onto the high-quality powder collection level.
ii) High-quality collection level: A high-quality stainless steel surface that is stretchable horizontally and onto which the bulk material flows during sample testing.
iii) Precision angle measuring device: A precision-machined protractor to precisely determine the angle of repose of the powder sample.

C) Performing the Measurement:

i) Filling: The precision-manufactured funnel is carefully and slowly filled with the bulk material to be tested.
ii) Opening: The opening of the precision-machined hopper is slowly opened.
iii) Dump cone: The bulk material forms a cone on the high-quality sample collection surface.
iv) Measurement: The exact angle between the base of the cone and its lateral surface is precisely measured. This angle corresponds to the angle of repose.

D) Factors Affecting the Angle of Discharge:

i) Particle size and particle shape: The smaller and rounder the particles are, the smaller the measured angle of repose generally is.
ii) Particle density: Dense particles often lead to smaller angles of repose.
iii) Moisture: Moisture can increase the angle of repose because it reduces friction between the particles.
iv) Temperature: Temperature changes can influence the flow behavior of bulk solids and thus also the angle of repose.

E) Primary applications:

i) Pharmaceutical industry: For the characterization of powders for tablet manufacturing, including tablet powder, active ingredient mixtures, excipients, e.g., lactose and starch, to ensure uniform dosage and compressibility of the tablets.

ii) Construction materials industry: For evaluating the properties of aggregates for concrete.

iii) Food industry: For controlling the quality of flour and other powdered foods including sugar, cocoa, milk powder, spices, and many more to test flowability for mixing, dosing, and packaging processes.

iv) Chemical industry: For monitoring the storage, transport, and miscibility of pigments, dyes, additives, catalyst powders, and many more.

v) Plastics and Materials Engineering: For quality testing of the flow behavior and bulk density of plastic granules, powders for injection molding or 3D printing, and much more.

vi) Construction materials industry: For determining the flowability of mixing and conveying processes for cement, lime, gypsum, sand, and much more.

vii) Cosmetics industry: For ensuring a uniform texture and dosage of powders, talc, pigments, and much more.

viii) Agricultural and feed industry: For testing the storage and conveying properties of animal feed powders, grain flours, additives, and much more.

ix) Metallurgy / Powder metallurgy: For controlling flowability for precise shaping of metal powder for sintering processes or additive manufacturing and much more.

x) Paper and pulp industry: To evaluate the influence on the processing and surface quality of fillers such as kaolin or chalk powder and many more.