JPS6034691B2 - Powder adhesion measuring device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for measuring the adhesion force of powder and granular materials,
Specifically, the present invention relates to a device for applying a tensile load to a powder sample (hereinafter simply referred to as a sample) to break it, and simultaneously measuring the tensile load and displacement required for the sample to break.

Techniques for measuring the adhesion force of powder particles as the tensile load are well known, and there are various types. The present invention relates to a hanging type tensile strength adhesion measuring device using a two-part cell, and is a device for simultaneously measuring the tensile load and displacement amount at the time of sample breakage. Measuring the amount of displacement when a sample breaks is as important as measuring tensile load, and measuring these simultaneously and investigating their relationship is an important element in understanding the physical properties of the sample. be. However, in conventional measuring devices of this kind, the movable cell is supported by ball bearings, etc., which causes large friction with the transfer surface, and it is difficult to apply a large load to the sample in order to compactly fill the sample. Otherwise, it is not only impossible to perform measurements that apply a relatively large load due to constraints on the strength of the rolling surface, but also a large error tends to occur in the measurement of the tensile load. Therefore, when measuring the tensile load, the horizontal Measuring the amount of displacement in the direction and comparing it with the tensile load includes the above-mentioned error, and accurate measurement cannot be made. Therefore, the present invention aims to eliminate these drawbacks, and the configuration of the present invention will be explained with reference to the following examples.

2 is a column, and 4 is a fixed cell, both of which are fixed to the fixed base 1.

The movable cell 5 corresponds to the fixed cell 4 and is fixed to the movable frame 3 at the same position and height, the lower ends of a plurality of suspension members 6 are joined to the movable frame 3, and the upper ends of the suspension members 6 are connected to the pillars 2. The fixed cell 4 and the movable cell 5 are held suspended and are in a freely suspended state.
It is arranged so that the gap between the mating surfaces is zero. Although the suspension member 6 is made of a plate spring, it may be made of pond material, raw material,
In addition, a rigid punch with knife-edge type supporting members arranged at both ends can be used. Reference numeral 8 denotes a filling cylinder, and 9 a presser weight, both of which are fitted onto the cells 4 and 5 to press and fill the sample 7 into the cells 4 and 5.
5 is for joining and fixing the cells 4 and 5.

This fixed odor 14 is configured in a ring shape, and is fitted with iron on the outside after the joint surfaces of the fixed cell 4 and the movable cell 5 are aligned, and is firmly attached to both cells 4 and 5 using a tightening screw 15. The inner diameter of the fixed odor 14 is set to have a relatively large margin compared to the outer diameter of both cells 4 and 5 when they are joined in preparation for attachment and detachment. Reference numeral 11 denotes a load measuring device, which is disposed on the movable frame 3 and whose detection end is connected to the filament 10, which in turn is connected to the winding mechanism 13.

12 is a differential transformer type displacement detector, and coil 1 of the outer cylinder
The coil 12a is arranged on the fixed base 1, and the movable iron core 12b is arranged on the movable base 3.
The displacement detector 12 and the load measuring device 11 are connected to an amplifier, a recorder, etc. (not shown).

Although a differential transformer is used as the displacement detector 12 in this embodiment, various other electric and mechanical displacement detectors such as a capacitance type, a dial gauge, a type using air pressure, etc. can be applied. It is possible that the load measuring device 11
uses a load transducer (such as the T-C type load transducer manufactured by Kyowa Dengyo Co., Ltd.) that has a built-in strain gauge and measures the electric resistance that changes with external force by converting it into a detected voltage, but it can also be used with other types of loads. It is also possible to apply measuring instruments. In the above configuration, after the cells 4 and 5 are aligned and fixed using the fixture 14 and the tightening screw 15, the sample 7 is pressed and filled with the filling cylinder 8 and the presser weight 9.

Next, the sample 7 is pressed and filled with the presser weight 9. Next, the presser weight 9 and the filling cylinder 8 are removed, and the excess sample 7 protruding from the upper ends of the cells 4 and 5 is scraped off using a scraping plate (not shown), and the fixing odor 14 and the tightening screw are removed. 15
The fixation is released, the winding mechanism 13 is operated to wind up one end of the cable 10, and a tensile load is applied to the movable frame 3 and the movable cell 5 via the fiber 10 and the load measuring device 11 to remove the sample 7. rupture. At this time, the state of the tensile load is measured by the load measuring device 11, or is displayed and recorded on a recorder at any given time via an intensifier connected thereto. On the other hand, the movable iron core 12b disposed on the movable frame 3 is combined with the coil 12a to detect and measure the amount of displacement of the movable iron core 12b, or the detection signal is sent to an amplifier and a recorder one by one to be displayed and recorded. Ru. The above-mentioned tensile load is considered to be the adhesion force of sample 7, and the above-mentioned displacement amount is considered to be the elongation amount of sample 7 at the time of breakage, and from this, the above-mentioned displacement amount and the above-mentioned tensile load, or the displacement situation when the tensile load is applied, etc. It can be observed and measured. As described above, the adhesion force of various samples 7 is measured using the maximum tensile load of the two-divided cell.According to the present invention, the movable cell 5 is suspended by the suspension member 6 via the movable frame 3, so it is not explained in detail above. Ball bearings and their rolling surfaces are free from rolling friction that is unnecessary for measuring tensile loads and impede measurement accuracy for minute movements such as, and therefore provide highly accurate measurement results. There is no need for extremely high-precision machining, which is required for machining cells 4 and 5, and when a large consolidation load is applied when filling cells 4 and 5 with sample 7, in the conventional method, movable cell 5 moves easily and is difficult to handle. In contrast, according to the present invention, since a suspension method using the suspension member 6 is adopted, the measurement operation is simple and reliable, and high-precision measurement can be performed. In addition, durability can be improved and a large consolidation load can be taken, so the measurement range is expanded and more samples and a wider range of measurement conditions are possible. Accurate quantitative measurements can be added to the measurement or analysis of the physical properties of the sample as a new element based on the amount of horizontal displacement at the time, so the scope of application of the present invention has been expanded, and it can be applied to powders for which there were many unknowns in the past. The effects of the present invention on the measurement of the physical properties of powder and granular materials are significant, such as being useful for basic physical property measurements and considerations in the field of engineering.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a main part of an embodiment of the present invention. In the diagram: 1... Fixed stand, 2... Support, 3...
Movable frame, 4... Fixed cell, 5... Movable cell, 6... Suspension member, 10... Strand, 12... Displacement amount detector, 1
3... It is a winding mechanism. Figure 1

Claims (1)

[Claims] 1 A half-cut fixed cell 4 fixed on a fixed base 1, a movable half-shaped movable cell 5 forming a pair of cells in correspondence with the fixed cell 4, and a movable cell on which the movable cell 5 is arranged. A plurality of suspension members 6 for suspending and suspending the frame 3, a strut 2 for supporting the suspension members 6, a winding mechanism 13 for the cable 10 that pulls the movable frame 3 in the horizontal direction, and a load measuring device 11. In an adhesive force measuring device configured to measure the tensile load required to break the bond between the fixed cell 4 and the movable cell 5, the amount of horizontal displacement of the movable cell 5 is measured at the same time as the tensile load is measured. An apparatus for measuring the adhesion force of powder or granular material, characterized in that a displacement detector 12 for measuring the amount of displacement is disposed between a movable frame 3 and a fixed base 1 in correspondence with each other.