SU1419798A1 - Apparatus for induction melting of metal subsequent centrifugal casting in gas-shielded atmosphere - Google Patents

Abstract

The invention relates to equipment for high-frequency and medium / frequency melting of metals and subsequent centrifugal casting in a protective atmosphere, in particular, small objects for dental purposes. The purpose of the invention is to increase the reliability of the device and reduce energy costs. The coil inductor 20 is located in the cabinet 6 of the casting space, rigidly mechanically and electrically connected to the terminals of the oscillation capacitor 10. The height-adjustable excitation coil 21 of the oscillator is mounted coaxially with the inductor 20. The melting crucible 12 is located on the swing arm 2 centrifuges on sled 15, adjustable in height and located in a rigid base, so that in the process 7. with (L

Description

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All melting preparations. The melting crucible is moved down to a rigid coil inductor 20 and after the melt. 1419798

17, the slide with a nlapiliy crucible is returned back to the upper position to the level of the base with a cuvette 5.

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The invention relates to equipment for high-frequency or medium-frequency smelting of metals and subsequent centrifugal casting in a protective atmosphere, in particular small castings, such as dental iipoieces.

The closest but technical: co-1 essence and the achieved effect; ..; A device for induction melting of meta.chla and subsequent centrifugal casting in a protective atmosphere, including a generator with a ry cooling system condenser, a centrifugal inductor located in the casing, liter) - is your mechanism with a noi-o-zide drive around the vertical p axis ;; chaga, at one end of which pa: iia is casting a mold with an IchalIi; IH i l crucible, and n; -, the other - a protyroses.

A disadvantage of the known device is the low reliability of the PCG and the high energy consumption.

The goal of this is to increase iia the reliability of the operation of the device and i li-i means energy costs.

The drawing shows the ycTpoiici iso equipment for high-frequency or mid-frequency smelting of metals and then centrifugal casting in a protective atmosphere.

The device consists of a high-precision, and: - total or medium-sized rejiepator 11 with a condenser unit 10 installed in the case 9, a water cooling unit (not shown) and a centrifuge mechanism, which is located in the casting cabinet 6 spaces of well-conducted material equipped with a lid 7. On the primary shaft 23 of the centrifuge connected to the shaft of the brake motor 1, located under the cabinet 6 of the casting space, a rotary shoulder 2 is installed, at one end of which p 4 3.p. f-ly, 1 ill.

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1WTL counterbalance 3 and closer to another KOHua, nonsup |; its base 4 cuvettes 5, fixed rigid base 16 with prulapy 17, connected to the lower 5 KoifLfOM adjustable thigh height of the sled 15, laying the 1X melting crucible 12. By using the correct liner 1 and 1: 13, the nesush of the 1X melting crucible 12. By means of a correct liner 1 and 1: nigher 15, the layer of the 1X melting crucible 12. By means of the correct liner 1 and 1; 12 in the coil-type Hi ;; ivbTop 0 with a cavity in the lower u h-esti of the body of the sled 15, in which 1.-id1 pgr; ggiru1; yes-h latch 18. In 1 G1H11em polo; sled the sled 15 finds-. ln: Knitwork crucible 12 in the level of os-: ii ,: inn i 4 kunety 5. Under the melting lif.U M /. installed above isolating where; , ;; - city morgue: d; oh 22, separating the cabinet U l:.: G1 th of the 1st space from the casing of the 9th axis: the condensing capacitor 10, ca. and the inductor 20 is formed by a hollow pro. Bij /, the peak of one or more of them, a railway connected mechanically, and a lector of the circuit with the Oscillators -,;,; ii; iHoro}; about the densator 10. Near the cat-: .jioi o inductor 20 is installed fuir; ri;,. pei-yjuipycMaK coil 21 is an oscillator 11, 11 oscillator so that the coil is 1; G inductor 20 is a perfect oscillatory inductive-;

 ill. 1: g; d, above the cabinet 6 of the foundry space; Ti; a fastens the locking latch - 4.1 i8, connected electrically with Kuii r.KroM 9. In the cabinet 6 of the cabinet 6 foundry- I OiC, pr;

5 input 14 for the atmospheric atmosphere, and on the sled 15, by pdom with a hole in the plane B; i.ibHoiu; l 12 moves the flow GZ; Set up the atmosphere. KrSh1ke 7 cabinet 6 with a viewing window arranged

 tshch that it is connected by contact 8 with the chain No. 1 of the control of the brake motor 1 so that when the cover 7 is opened, the brake motor 1 is switched off.

5 Teimoi lux on -oscillatory capacitor 10 coil inductor

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20 is diverted by a liquid cooling system to a cooling water battery, which is adjacent to the equipment, best of all in the free space under cabinet 6 of the casting space (in the drawing, the battery is not shown). The number of layers of the coil inductor 20 is determined by the size of the melting crucible 12 and the amount of melt.

The device works as follows.

With the open flake 7, the calcined cuvette 5 is loaded into the base 4 of the cuvette 5, which is set in height so that the inlet channel into the cuvette 5 is opposite the mouth of the exit of the melting crucible 12 and the base 4 of the cuvette 5 moves tightly to the melting crucible 12. The melting crucible 12 is filled with an appropriate amount of metal alloy granules and by releasing the nut of the spinning arm 2 of the centrifuge, the rotating arm 2 of the centrifuge is counterbalanced 3. After tightening the nut 2 ovorotnogo shoulder electrical switch is released the brake braking the motor 1, and the pivoting arm 20, centrifuges re vodits position for introducing the melting crucible 12 into the cavity 20. Compression coil inductor slide 15 to its lower position, the movement of the base 16 provides carriage position 15; The arresting latch 18 disconnects the contact 19 of the slide 15 and at the same time the protective atmosphere suction tube 13 is put on the protective atmosphere supply 14. Using the electric button again, the brake motor is braked. Crush 7 of cabinet 6 of the casting space is closed, which simultaneously activates contact 8 of blocking cover 7, which allows switching on high-frequency generator 11. After switching on high-frequency generator 11, high-frequency current flows through conductors of coil inductor 20 through a high-frequency magnetic field in coil coil 20 quickly melts the charge in the melting crucible 12 and at the same time opens the supply of inert gas, which is fed by the tube (14 and 13) above the melt level in lavil98 4

crucible 12. After the charge has been melted and the required melt temperature has been reached, the electrical signal shuts off the operation of the high-frequency generator 11, closes the supply of protective atmosphere 14, releases the arresting latch 18 and slide 15 with the melting crucible 12 and melts under

the action of the spring 17 moves along the base 16 into the upper half, the contact 19 of the slide 15 is opened, which turns on the brake motor I and the centrifuge arm 2 begins to rotate. Under the influence of centrifugal force, the melt from the crucible 12 flows in the cavity of the fuma in the cuvette 5. The rotation ends with an electric control signal. In coil

21, when the high-frequency generator 11 is operated, an excitation voltage arises. The propagation of strong high-frequency electromagnetic fields into the environment is prevented by a careful electromagnetic screening of the generator 11, the casing 9 of the oscillation capacitor 10, the casting space in cabinet 6 and the dense high-frequency connection

between the generator screen 11 and the case 9 of the oscillation capacitor 10 and in the separation plane of the case 9 of the oscillation capacitor 10 and the casting space. Insulating partition 22, which contains elements for connecting the coil inductor 20 and the excitation coil 21 and is part of the division plane between the cabinet 6 of the casting space and the skin 9 of the oscillating capacitor 10, prevents the penetration of contaminants from the cabinet 6 of the casting space into the casing 9. Heat, to work with in coil-type inductor

20 and the oscillation condenser 10, is discharged by a liquid cooling system with forced circulation to a collection-battery.

The proposed device is suitable

Claims (5)

1. A device for the induction melting of metal and subsequent centrifugal casting in a protective atmosphere, including a generator with a condenser, a cooling system, an inductor, a centrifugal casting mechanism placed in the casing with a drive in the form of a rotary around the vertical axis of the lever, at one end of which is a mold with a melting crucible, and on the other - a counterweight, means supply and. A protective atmosphere, characterized in that, in order to increase the reliability of the device and reduce energy costs, it is provided with a lid, marked up in the upper part of the casing, a brake located under the casing, a support and a spindle fixed relative to the support on the pivot arm and carrying the melting crucible with a mold. 2. The device according to any one of the preceding claims is that the inductor is made with one winding of a hollow conductor. 3. The device according to claim 1, about t l and - the fact that the inductor is made in the form of a hollow conductor from more than one winding. 4. The device according to claim 1, about tl and - that the means for supplying a protective atmosphere is installed in the casing, and the means for exhausting the protective atmosphere - on the sled. 5. The device according to claim 1, wherein the cover of the housing is electrically connected with the brake.