JPS6034693B2 - Powder adhesion measuring device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an instrument for measuring the adhesion force of powder and granular materials, and more specifically, a tensile load is applied to a powder and granular material sample (hereinafter simply referred to as a sample) to break it, and the resulting sample is The tensile load required for the sample to break is regarded as the adhesive force of the sample, and this relates to bag counterfeiting for measuring the adhesive force.

Techniques for measuring the tensile load of powder and granular material as adhesive force are well known, and there are various types.

Conventionally, in this type of measuring device, one cell was supported by a ball bearing, etc., and the friction with the transfer surface was large. Due to restrictions on the strength of the rolling surface, it is not only impossible to perform measurements that apply a relatively large load, but also tends to cause large errors in the measurement of the tensile load, making accurate measurements impossible.
In addition, even if one of the cells is suspended in order to improve the above-mentioned drawbacks, if a load, especially a fairly large load, is applied to compact the sample, the other cell will be fixed. Since one of the suspended cells is also fixed to and held by the fixed cell using a separate fixture or the like, it is possible to carry out measurements sufficiently for practical use against a certain amount of additional load. However, when the additional load becomes large, the suspension member that hangs and supports the movable cell, although it is fixedly held by the fixed cell, is not completely free of load, so the load that exceeds the holding force of the fixed odor is added. If this happens, there is a risk that the suspension member will stretch to some extent, causing misalignment between the mating surfaces of the bolt and both cells. This becomes more noticeable as the applied load increases, and at this time cracks occur in the sample near the mating surfaces of both cells, making the measurement impossible.The present invention aims to eliminate these drawbacks. The structure of the present invention will be explained with reference to the following examples. 1 is a machine base, and 2 is a support that is fixed to the machine base 1.

4 and 5 correspond to cells, and each has a support stand 3 at the same position and height.
a, 3b.

The lower ends of a plurality of suspension members 6 are joined to the core support stands 3a and 3b, and the upper ends of the suspension members 6 are suspended and held by the pillars 2, and in a freely suspended state, there is a gap between the mating surfaces of the cells 4 and 5. is arranged so that it is zero. 12 is a holding member for machine base 1
This is to prevent one of the support stands 3a, 3b from moving in the horizontal direction with respect to the other support stand 3b on the towing side. The pin-shaped or plate-shaped members 12 are attached in contact with both the front and rear end surfaces of the support stand 3a, and the support stand 3a does not move horizontally, but can freely slide vertically, and the additional load is reduced. It is optimal to completely eliminate the induction of vibrations due to sliding on the cells 4, 5 when the support stands 3a, 3b hang down during application.

Note that the suspension member 6 has a necessary length such that vertical deviation of the support stand 3b can be ignored even if the support stand 3b moves slightly in the horizontal direction for measurement. ,
In addition to being made of a leaf spring, its constituent material may be a bamboo material, a strip of material, or other materials, and a rigid village with knife-edge type supporting members arranged at both ends can be used. 8 is a filling cylinder, 9 is a presser weight, and both are iron-bonded on cells 4 and 5. Sample 7
The fixture 14 and the tightening screw 15 are used to join and fix the cells 4 and 5.

Reference numeral 11 denotes a load measuring device, which is the other support stand 3b of the support stand 3a.
The detection end thereof is connected to the filament 10.

The strip 10 is connected to a winding mechanism 13, and the load measuring device 11 is connected to an amplifier, a recorder, etc. (not shown). The load measuring device 11 uses a load converter (for example, a T-C type load converter manufactured by Kyowa Dengyo Co., Ltd.) that has a built-in strain gauge and measures electrical resistance that changes in response to external force by converting it into a detected voltage. However, it is also possible to apply other load measuring instruments. In the above configuration, after the cells 4 and 5 are aligned and fixed with 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, and then the presser weight 9 and the filling cylinder 8 are removed. Upper edge of cells 4 and 5. Scrape off the excess sample 7 that has protruded out using something like a scraping plate (not shown), and then remove the fixing tool 14 and tightening screw 15.
The reason for completing the measurement preparation is to release the fixation by the filling tube because the plurality of suspension members 6 that suspend the support stands 3a and 3b are made of the same elastic body and are configured so that the added load is the same. 8. When the presser weight 9 is added, the same amount of downward elongation occurs due to the weight, and the support stands 3a and 3b are slightly lowered with the same dimensions, and when the filling cylinder 8 and presser weight 9 are removed, elasticity is generated. Although the force returns the cell to its original height, since the amount of descent due to the elongation of the suspension member 6 is the same, there is no misalignment between the cells 4 and 5, so that the above-mentioned trouble in measurement does not occur.

Next, the winding mechanism 13 is activated to wind up one end of the filament 10, and a tensile load is applied to the filament 10, the one support pedestal 3b, and one of the cells 5 via the load measuring device 11, and the sample 7 However, the holding member 12 prevents only the horizontal movement of the other support base 3a that supports the other cell 4.
Therefore, when the above-mentioned tensile load is applied, it is in a fixed state and is separated from the one cell 5. Incidentally, an amplifier and a recorder (not shown) are connected to the load measuring device 11, and the above-mentioned tensile load situation is displayed and recorded on the recorder one by one. Various samples 7 were prepared as described above.
According to the present invention, cells 4 and 5 are suspended members that exhibit the same elongation with respect to the additional load for the filling cylinder through the support stands 3a and 3b, respectively. Since the cells 4 and 5 are suspended by the same suspension method, there is no misalignment between the two cells 4 and 5, which would be a problem with a device in which only one cell 5 is suspended, which would be the case with a device in which only one cell 5 is suspended. Provides convenience and certainty,
In addition, high-precision measurements can be made, and in addition, durability can be improved, and the consolidation load can be considerably increased, so the measurement range is expanded, making it possible to measure more samples and a wider range of measurement conditions. The present invention is industrially very useful for measuring the adhesion of particles.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a main part of an embodiment of the present invention, and FIG. 2 is a plan view of this embodiment. In the figure, 1... Machine base, 2... Support, 3a, 3b
... Support stand, 4, 5... Cell, 6... Suspension member,
DESCRIPTION OF SYMBOLS 10... Textile, 12... Holding member, 13... Winding mechanism. Figure 1 Figure 2

Claims (1)

[Claims] 1 Two divided cells 4 and 5 that correspond to form a pair of cells
A plurality of suspension members 6 which bear the same load and exhibit the same elongation, and a machine base 1 which supports the suspension members 6, are suspended. The fixed strut 2, the cable 10 for horizontally pulling the one support pedestal 3b, the winding mechanism 13 for winding up the cable 10, and the horizontal tension of the other support pedestal 3a. A particle adhesion measurement device characterized in that one end of a holding member 12 for preventing directional movement is pivotally supported on the support stand 3a, and the other end is fixed to the machine stand 1.