SU1732963A1 - Device for vibration consolidation when making teeth prosthetic - Google Patents

Abstract

The invention relates to medical technology. The purpose of the invention is to simplify the design while improving the quality of the vibration compaction process. The device contains a vibrator and a stage 4, legs 9 attached to the movable end of the leaf spring 6. The vibrator is installed in a cylindrical body 1, on the outer side of which an annular groove is made, in which a adjusting ring having radial projections is mounted in horizontal slots x of which are installed lamellar springs 6, made in the form of circular arcs, with the fixed end of each of the springs 6 attached to the housing 1.7 Il.

Description

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The invention relates to medical technology, in particular to the equipment of dental laboratories.

The purpose of the invention is to simplify the design while improving the quality of the vibration compaction process.

Fig, 1 shows the device, a general view; figure 2 - section aa in figure 1; on fig.Z - section bb in figure 2; figure 4 is a fragment of the tuning ring with springs and a table, axonometric (the body and the electromagnet not conventionally shown); figure 5 - section bb in figure 2; figure 6 is a section bb In figure 5; figure 7 - section GG in figure 5.

The device consists of a housing 1, in the center of which a vibrator in the form of an electromagnet 2 is fixed, and its measles 3 is rigidly connected to the stage 4. There is a gap between the electromagnet 2 and its core 3. In the housing 1 there is a groove in which a modular adjustment ring 5 is movably placed, having internal projections D — limiters (FIGS. 2, 3), in the slots of which the plate springs 6 are inserted, made in the form of circular arcs. The springs 6 are fixed with one end on the housing 1 by means of the sleeves 7 and screws 8 (FIG. 3). At the other ends of the springs 6, the legs 9 of the stage 4 are attached. Rotating the ring 5 in the groove 10 of the housing 1 changes the working length I (fig. 3) of the springs 6 between the projections 11 — the limiters and the attachment points of the legs 9 of the stage 4. Therefore, change The stiffness of the springs 6 is the natural frequency of the oscillating system — the oscillation amplitude of the stage 4.

The device works as follows.

A dental prosthesis, a cuvette with a plaster model, etc., are attached to the stage 4, for example, using a suction cup (not shown). The electromagnet 2 is powered by a current of a fixed frequency, and the stage 4 begins to vibrate. By turning the adjusting ring 5, the required amplitude of oscillations of the table 4 is determined, which is determined empirically according to the efficiency of vibro-compaction (condensation). If necessary (for a different particle size of compacted materials) switch the frequency of the supply current and also by turning the tuning ring 6 choose the desired amplitude of oscillations of the table 4.

The use of the device allows to simplify the design due to the exclusion of the duplicating oscillatory system and the introduction of amplitude adjustment and

oscillation frequencies directly into the vibrator, simplify the tuning of the oscillation amplitude (and therefore shorten its duration), since the search for the required amplitude of oscillations is performed by an elementary method — turning the adjusting ring, and the method of successive approximations of adjusting the amplitude of oscillations is eliminated, quickly and simply optimally match the amplitudes and frequencies of mechanical vibrations for vibration compaction with a maximum bulk density of the mother fishing consisting of particles classified by size, or mixtures thereof, such as the manufacture of porcelain teeth must be applied is compacted by successive strokes on the skeleton of a porcelain mass. When vibrating from

the mass evolves moisture (moisture condensation is underway). The higher the bulk density of the porcelain mass of the tooth, the less moisture there is in it, which leads to a decrease in the quality (strength) of the tooth - the appearance of microcracks in the tooth mass during the subsequent technological operation - sintering.

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Claims (1)

Invention Formula A device for vibrocompaction of materials in the manufacture of dental prostheses, containing a vibration exciter, an object table, legs attached to The movable ends of the leaf springs, characterized in that, in order to simplify the design while improving the quality of the vibro-compaction process, a cylindrical body, a tuning ring and plate springs are inserted into it, and the exciter is mounted in a cylindrical body, on the outer side of which an annular groove is made, in which made with the possibility radial rotation tuning ring with radial protrusions, in the horizontal slits of which are installed lamellar springs, made in the form of circular arcs, with the fixed end Each of the springs is attached to the housing. L -I five fig.-f J6 fig 2 lt eleven Bv five ten Fig 3 Ј-Ь d (pt / zSГ GgVernugl H- Јb / g / ft pool,