JP2005313038A - Ultrasonic vibration sieving machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an ultrasonic vibration sieving machine having a high treatment capacity owing to transmission of high-frequency vibrations from a resonance ring through a metal net and allowing sieving of a fine powder by setting the conditions of a resin net. <P>SOLUTION: A metal sieving net 17 is fixed with an adhesive to the top surface of a resonance ring 13 arranged within a vibration container 2, and a resin sieving net 18 is stretched over the metal sieving net 17 so as to overlap in a not-adhered manner. The metal sieving net is 100 to 200 mesh, and the resin sieving net has a wider sieve opening than that of the metal sieving net. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an ultrasonic vibration sieving machine.

Conventionally, an ultrasonic vibration sieving machine known from the following Patent Document 1 is provided with a resonance ring (ring resonator) fixed with an ultrasonic oscillator so as to contact the lower surface of the sieving net, By transmitting to the sieve mesh through the resonance ring and vibrating the sieve mesh, the processed materials such as various powders and granules are screened and mixed and agitated.
Japanese Patent Laid-Open No. 11-128842

  By the way, metal sieve nets (hereinafter referred to as “wire meshes”) such as stainless steel meshes that are generally distributed in the market have a minimum mesh size of about 20 microns, and those with fine mesh sizes are difficult to manufacture. It is not commercially available, and even if it could be manufactured, it would be expensive and expensive. On the other hand, sieve mesh made of synthetic resin (hereinafter referred to as “resin mesh”) is also manufactured with fine openings of around 5 microns, and those with antistatic treatment are also offered to the market relatively inexpensively. For this reason, even if the metal mesh is clogged due to static electricity and difficult to screen, powder can be screened by using the resin screen.

However, since the resin mesh is generally soft, when used in the above-mentioned ultrasonic vibration sieving machine, the high-frequency vibration from the resonance ring is attenuated and difficult to transmit to the processed material. There has been a problem of a significant drop.
Therefore, the present invention is intended to solve such problems in the ultrasonic vibration sieving machine.

  In order to solve the problem, an ultrasonic vibration sieve machine according to claim 1 is configured such that a metal sieve mesh is fixed to an upper surface of a resonance ring provided in a vibrating container with an adhesive, and the top of the sieve mesh. A synthetic resin sieve net is stretched so as to overlap in a non-adhered state.

  According to a second aspect of the present invention, in the ultrasonic vibration sieving machine, the number of meshes of the metal sieving net is 100 to 200 mesh.

  According to a third aspect of the present invention, in the ultrasonic vibration sieving machine, the synthetic resin sieve screen has a larger number of meshes than the metal sieve screen.

  According to a fourth aspect of the present invention, in the ultrasonic vibration sieving machine, the synthetic resin sieve screen is subjected to antistatic treatment.

  Since high-frequency vibrations from the resonance ring are transmitted through the wire mesh, the processing capability is high, and fine powder sieving can be dealt with by setting the resin mesh.

  Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a longitudinal sectional view of an ultrasonic vibration sieving machine according to the present invention. 1 is a base, 2 is a bottomed cylindrical vibration container supported by a coil spring 3 on the base, and 4 is the vibration container. The vibration motors 5 and 6 fixed to the lower part of 2 are non-equilibrium weights attached to the motor shaft, and 7 is a sieve discharge cylinder provided on one side of the vibration container. Further, an annular hopper 8 is disposed on the upper portion of the vibrating container, and the upper end opening edge of the vibrating container 2 and the hopper are connected by winding a metal band 9.

  As shown in FIGS. 2 and 3, reference numeral 10 denotes an annular frame having a flange 11 formed on the outer periphery, and a plurality of stays 12 are fixed to the frame by welding. An annular resonant ring 13 as a vibration conductor is fixed to the end by welding. The resonance ring 13 is formed in a hollow shape by forming a square pipe into a ring shape. The frame 10 is fixed to the upper part of the vibrating container 2 by sandwiching the flange 11 between the vibrating container 2 and the hopper 8. Reference numeral 14 denotes an ultrasonic oscillator fixed to a part of the resonance ring, and reference numeral 15 denotes a relay socket fixed to the lower surface of the frame body 10 in order to supply a high-frequency current to the oscillator via a cable 16.

  Reference numeral 17 denotes a metal sieving net (hereinafter referred to as a metal net) firmly fixed to the upper surface of the resonance ring 13 with an adhesive, and an antistatic treatment is performed on the metal net 17 so as to overlap with the non-adhesive state. A synthetic resin sieve net (hereinafter referred to as a resin net) 18 is provided, and the periphery of the metal net 17 and the resin net 18 is sandwiched between the upper surface of the frame 10 and the lower edge surface of the hopper 8. The wire net 17 and the resin net 18 are stretched in the vibration container 2. The wire mesh 17 is a 100-200 mesh stainless steel wire mesh, and the resin mesh 18 has a mesh size of about 45 microns (330 mesh) smaller than the wire mesh 17.

  In the ultrasonic vibration sieving machine configured as described above, a high frequency current of 20 kHz to 40 kHz is supplied from a generator (not shown) to the ultrasonic oscillator 14 to oscillate the ultrasonic oscillator, and the high frequency vibration is passed through the resonance ring 13. The processed material such as powder loaded on the resin net 18 is screened and discharged from the discharge cylinder 7. Moreover, since the vibration container 2 can be vibrated by rotating the vibration motor 4, low-frequency vibration is added to the high-frequency fine vibration, and the processed material can be efficiently screened.

  Further, the vibration of the resonance ring 13 vibrates the wire mesh 17 fixed on the upper surface thereof, and the vibration of the wire mesh 17 is transmitted to the resin mesh 18, so that the entire surface of the resin mesh 18 vibrates without difficulty and improves the screening processing capability. be able to. In addition, it is easy to transmit a vibration to use the wire mesh 17 of 100-200 mesh.

  In addition, in the conventional ultrasonic vibration sieving machine in which only the wire mesh is stretched, it is costly to replace the wire mesh with a new wire mesh, but in the present invention, the number of resin meshes is reduced. More than the number, the processed material is substantially screened by the resin mesh, the frequency of wire mesh breakage is reduced, and if the resin mesh breaks, a new resin mesh is placed on the wire mesh. Since it is only necessary to change, there is an advantage that maintenance is easy and cost is reduced. In addition, the use of a resin net has an advantage that it can easily cope with fine powder sieving.

Next, an example in which the toner (particle diameter of 45 microns) for an electronic copying machine mainly composed of resin powder is screened for removing foreign substances by the above ultrasonic vibration sieving machine will be described. As the wire mesh 17, a stainless steel wire mesh of SUS304 (150 mesh) was used, and a resin mesh 18 having an opening of 45 μm subjected to antistatic treatment was placed thereon. The processing capacity at this time was 670 kg / h.
On the other hand, when the toner was screened only with a SUS316 stainless steel mesh having a mesh size of 45 microns without using a resin mesh, the processing capacity was halved to 286 kg / h.
This difference is presumed to be partly due to the fact that clogging due to static electricity occurs only in the metal mesh, whereas clogging due to static electricity is less likely to occur in the resin net 18. In any case, it has been confirmed that according to the present invention, the processing capability of the ultrasonic vibrating screen can be greatly improved.

The systematic diagram of the ultrasonic sieving machine which shows the embodiment of the present invention, and its abnormality detection device. The expanded longitudinal cross-sectional view of the principal part of the ultrasonic sieving machine shown in FIG. The perspective view of the lower surface of the sieve net | network of the ultrasonic sieving machine shown in FIG.

Explanation of symbols

2 Vibrating vessel 13 Resonant ring 14 Ultrasonic oscillator 17 Metal sieve mesh (wire mesh)
18 Sieve mesh made of synthetic resin (resin mesh)

Claims (4)

  A metal sieve mesh is fixed to the upper surface of the resonance ring provided in the vibration container with an adhesive, and a synthetic resin sieve mesh is stretched over the sieve mesh so as to overlap in an unbonded state. An ultrasonic vibration sieving machine characterized by   The ultrasonic vibration sieving machine according to claim 1, wherein the number of meshes of the metal sieving mesh is 100 to 200 mesh.   The ultrasonic vibration sieving machine according to claim 1 or 2, wherein the synthetic resin sieving net has a larger number of meshes than the metal sieving net.   The ultrasonic vibration sieving machine according to any one of claims 1 to 3, wherein the synthetic resin sieve screen is subjected to antistatic treatment.

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