Operation instructions for powder shear tester

2.1.Description:

By analyzing the dynamic data of powder to describe the flow behavior, arch/mouse hole structures are often found in the powder industry during processing, storage, transportation, and material storage; If the compression arch is subjected to the pressure of the silo, the consolidation strength increases, resulting in arch formation; The wedge-shaped arch block materials mesh with each other at the hole opening to form an arch bridge; The adhesion of moisture and electrostatic adsorption to the bonding arch enhances the adhesion force between the powder and the warehouse wall, forming an arch; Air pressure balance arch: Poor sealing of the unloading device causes a large amount of air to leak into the warehouse from the bottom, resulting in a balance of air pressure between the upper and lower layers of the material; In the storage and transportation system of granular materials, the flowability of materials, friction between materials, and friction between materials and solid walls; In the design of the hopper, the size of the discharge port, the inclination angle of the hopper wall, and the pressure of the powder on the hopper wall can cause great difficulties in production if the hopper is not designed properly; These behavioral characteristics that affect the flowability of powders cannot be solved using traditional measurement methods;

This machine quantitatively analyzes the above phenomena and states by measuring dynamic data such as shear strength, flow function, internal friction function, loose and compacted density, time consolidation function, wall friction, bonding index, and temperature and humidity in the air Commonly used in quality inspection departments, developing new products, improving production processes and ratios
2.2.Function description:

Refer to ASTM-D6128-97; ASTM D6682-2008Using the Jenike method and the ring shear method to analyze the characterization characteristics of powder flow behavior, a data model was established and combined with PC software. Real time dynamic data collection and analysis curves were obtained through powder shear, consolidation, time, stress-strain relationship, yield strength function. The Mohr circle failure envelope, flow factor, effective internal friction angle, yield trajectory line, flow function, Jenike flowability index FI were established to determine flow and non flow and critical points, calculate the hopper half top angle, powder porosity, loose fitting and compaction change relationship, and precompression until steady-state flow state Provide both Chinese and English language operation interfaces
2.3.Scope of application:Widely used in agriculture, chemical industry, ceramic processing, food, cosmetics, and pigments Quality control and research in the fields of pharmaceuticals, metal powders, graphite powders, plastics, rubber, concrete, ore crushing, river sand and other powder and granular materials are commonly used in production and processing enterprises, research institutes and universities
2.4.Technical parameters:

1）. Principal stress (vertical pressure): 0-500N (optional 100N; 300N; 500N) Standard 300N

2）.Torque range: 0-50N.m(You can choose 10)N.m;30N.m;50N.m）Standard 10N.m
3）.Shear speed: 0.1 mm/sec～5 mm/sec.

4）.Using Moore's Circle Law to Analyze Friction Function

5）.Automatic data measurement and processing

6）.Use pre compaction to process the sample

7）.Cutting mode: forward and reverse cutting modes

8）.Automatic self calibration function of the instrument
9）.The cutting box comes with two types of stainless steel covers, suitable for internal friction and wall friction respectively. Other materials can be customized

10）.Overflow collection tray and sample sorting blade
11）.Communication interface: USB, RS-232 interface

12）.Temperature and humidity range:8-40℃ relative humidity between 35-80%

13）.Purchase: 1 set of PC software for process analysis and database establishment
14）. The power supply adopts 220V+10%/50Hz

Key points for instrument installation

4.1Installation Introduction

This chapter mainly introduces the rules for product unpacking, inspection, and preparation before use.

4.2Unsealing and Inspection

The product is packaged in a wooden box protected by foam. If the packaging box is damaged upon receipt, please check the appearance of the machine for any deformation, scratches, or panel damage. If there is any damage, please notify the manufacturer or its distributor immediately. Please keep the packaging box and foam to understand the cause of the occurrence. Our service center will help you solve the problem. Do not immediately return the product without notifying the manufacturer or its distributor.

4.3Preparation before use

4.3.1input voltage

Input 220V, with stable current and voltage environment, no electromagnetic interference

4.3.2.The instrument should be placed firmly on the workbench, without swinging, and able to support both sides of the total mass of the instrument

4.3.3Surrounding environmental conditions for use---The following environmental conditions must not occur

Flammable and explosive air environment. Unstable workbench

In places with direct sunlight. A damp place

Corrosive air environment. Air pollution is heavy with dust

4.4Storage and transportation

4.4.1surrounding environment

The instrument can be stored and transported under the following conditions:

Surrounding temperature: 10 ° C to 60 ° C

Height: 7620 meters (25000 feet)

This machine must avoid sudden temperature changes, which may cause water vapor to condense inside the body.

4.4.2Original packaging:

Please keep all original packaging materials. If the machine needs to be returned to the factory for repair, please use the original packaging materials for packaging. Please contact the maintenance center of the manufacturing plant first. When sending for repair, please make sure to return all the attachments together, and indicate the fault symptoms and reasons. Additionally, please indicate "Fragile Items" on the packaging and handle with caution.

Sample preparation and processing

5.1.It is recommended to process the sample before the experiment. For sample preparation, loose samples need to be placed in a fixed sealed container in a constant environment without vibration; The storage time exceeds about 12 hours

5.2.Different samples should be classified and managed separately, and the processing of samples needs to be very careful to prevent environmental pollution or mixing pollution before different samples; It is necessary to ensure the consistency of each sample in order to obtain reliable data It is recommended to use labor protection equipment, clothing, gloves, etc

5.3.During the sample preparation process, please use a unified tool to handle the sample; After processing each specification sample, the equipment needs to be cleaned before processing samples of other specifications to ensure consistency and reduce the impact and uncertainty caused by external factors such as equipment material

5.4.The purpose of the experiment is to obtain more accurate and reliable data, which is a key factor in the experiment. During the testing process, we recommend conducting pre testing work before testing, using pre testing methods to determine the required sample size for quantitative analysis. Under consistent sample conditions, ideal data reliability and repeatability can be obtained

5.5.Note that samples of the same specification can be retested using the calibrated sample size, while samples of other specifications need to be re quantified