JPH02196925A - Detection of packing amount of conductor powder - Google Patents

Abstract

PURPOSE:To easily and exactly detect the packing amt. by detecting the packing of powder up to a set position by electric resistance. CONSTITUTION:A hopper 1 is communicated with a pipe 2 and is communicated with a discharge system as well. A vacuum rubber plug 3 connects the pipe 2 and a pipe 7 at the peak part of a powder packing container 6. A measuring instrument 8 measures the resistance between the powder packing container 6 and an electrode 4 and has an electrode 5 for detecting resistance to be screwed to the front end of an electrode 4 concentrical with the pipe 7 in the pipe 7. Current flows from the powder 9 via the container 6 to the resistance measuring instrument 8 when the powder is packed into the powder packing container 6 and arrives at the bottom end of the electrode 5. The packing of the powder 9 up to the prescribed position is thus confirmed.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a method for detecting the filling amount of conductor powder.

(Prior art) When filling an opaque metal container with metal powder, such as conductor powder, there is a method to check how far it is filled.
One method is to insert a measuring device from above and measure the distance from the top end of the container to the top surface of the packed powder. However, this method cannot be used if the container is vacuum-sealed, and
Although it can be estimated to some extent from the weight of the powder), the exact amount of filling cannot be determined due to differences in packing density.

Although it can be calculated from the volume inside the container and the powder density, there is a large deviation due to the difference in the packing density of the powder.

(Problems to be Solved by the Invention) It is an object of the present invention to solve the above-mentioned problems of the prior art and to provide a simple and accurate method for detecting the filling amount.

(Means for solving problems through invention) In a method of filling conductive powder such as metal powder into a vacuum-sealed metal container whose interior cannot be seen through, it is detected by electrical resistance that the powder has been filled to a set position. I decided to do so.

(Example) An explanation will be given based on FIG. 1. 1 is a hopper, which communicates with pipe 2 and also with the exhaust system.

3 is a vacuum rubber tube, which connects the pipe 2 and the pipe 7 at the top of the powder filling container 6. 8 is powder filling capacity II
A resistance measuring device for measuring the resistance between 6 and the electrode 4,
A resistance detection electrode 5 is provided in the pipe 7 and has a threaded portion 10 concentrically with the pipe 7 and screwed onto the tip of the electrode 4.

When the powder is filled into the powder filling container 6 and reaches the lower end of the electrode 5, a current flows from the powder 9 through the container 6 to the resistance measuring device 8, making it possible to confirm that the powder 9 has been filled to a predetermined position. .

Thereafter, the pipe 7 and the electrode 5 are spot welded together with the electrode 5 at position 11 in FIG. 1, and vacuum sealed. and its upper position 1
In step 2, the electrode 5 is also cut.

If it is to be used repeatedly, simply add the missing part to the electrode 5 by soldering and it can be used any number of times. Further, by screwing the joint flat portions of the electrodes 4 and 5 (FIG. 2, 10), repeated use is possible.

Now, when the level of the filled powder 9 reaches the set position (the lower end of the electrode 5), a current starts to flow through the container 6 and the powder 9 therein, and the value indicated by the resistance measuring device 8 changes from infinity to a certain finite limit. It will now show the value.

If the filling operation is stopped at that point, overfilling or underfilling can be prevented.

(Effect) In a method of filling conductive powder such as metal powder into a vacuum-sealed metal container whose interior cannot be seen through, electrical resistance is used to detect when the powder is filled to a set position. . Although this method is simple, it is possible to very accurately measure the filling amount even in opaque and empty containers.

[Brief explanation of the drawing]

FIG. 1 shows an apparatus implementing the method of the invention. Fig. 2 is an enlarged view of the part shown by the ■ arrow in Fig. 1. FIG. 3 is a sectional view taken along the line m-nx in FIG. 2. In the figure: 1 hopper 2 pipe 3 vacuum rubber tube 4 resistance detection electrode 5 resistance detection electrode 6 powder filling container 7 pipe 8 resistance measuring device 9 powder 10 threaded part 11 sealing position after powder filling 12 cutting after vacuum sealing Above position Applicant Sumitomo Heavy Industries, Ltd. Sub-Agent Patent Attorney Isamu Ohashi Figure 1

Claims (1)

[Claims] In a method of filling conductive powder such as metal powder into a vacuum-sealed metal container whose interior cannot be seen through, it is characterized by detecting by electrical resistance that the powder has been filled to a set position. A method for detecting the amount of conductive powder filled.