SU1171312A1 - Method of multiple-cavity mould casting and device for effecting same - Google Patents

Abstract

1, the method of hot-pouring into a multi-site form, including feeding a multi-site slip on a slip tube lowered into a container with a melt of a slip along runner channels, creating pressure in this tank, characterized in that, in order to ensure waste-free and defect-free molding of products, the slip from the slip tube into the gating channels of a multi-seat form is fed through auxiliary channels through an intermediate chamber at a temperature equal to the working temperature of the slip, which is constantly stirred, and after filling From the shaped cavities of the mold, the areas of the slip located in the gating and auxiliary channels are transformed into a solid state by supplying a cooling medium, while the pressure in the tank with the slip leaving the molded products unchanged, then the slurry hardened during the previous molding cycle in the gating and auxiliary channels, the slurry is alternately melted, the slurry melted in the gating channels, together with the pressure from the intermediate chamber, is used for the next molding. 2. A method according to claim 1, wherein and in order to alternately melt the solidified sections of the slurry located in the runner (out and auxiliary channels:; ah, use a heating medium. 3. For a device. hot pouring into a multi-part mold containing a container with a melt of a slip, a slip tube and a mold, characterized in that, in order to ensure waste-free and defect-free molding of the products, it is provided with an intermediate chamber with an agitator and heater connected to the slip tube with a cavity through one side with spomogatelnymi kanagu Lamy, on the other hand - to form the second cavity through a sprue 4.Ustroystvo according to claim 3, about T L ichayuschees in that the tube-cavity communicated radiator...

Description

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The invention relates to the manufacture of products from ceramic slips on a thermoplastic bond by hot casting in detachable metal molds and can be used in automatic installations of injection molding machines.

The purpose of the invention is to ensure waste-free and defect-free molding of the extruded material from hot metal during hot casting.

The drawing shows schematically a device for carrying out the proposed method, a cut (the state of the slip sections in the phase of the end of the molding cycle and before the separation of the mold).

The device contains a molded product 1, a form 2, gating channels 3, a heating-cooling medium 4, a cavity 5 encompassing the lit. channels, inlet nozzle b, a radiator tube 7, an intermediate chamber 8, auxiliary channels 9, a cavity 10, covering auxiliary channels , slip tube 11, the tank 12 with the melt slip, the heater 13, the stirrer 14, the melt 15 slip, the outlet 16, the slip 17, frozen in the channels 3 and 9.

The method is carried out as follows.

in a way.

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Before the first filling of the shaping cavities of the multiplace form 2 with the melt 15 of the slip, the heating medium 4 is fed through the inlet nozzle 6 through the cavity 5, the radiator 7 and the cavity 10 connected in series from the heating and cooling medium supply system (not shown) and the channels 3 are heated up the most and 9 to the operating temperature. The medium is discharged through the pipe 16. Then, in the tank 12, the melt 15 of the slip creates pressure, under the action of which the melted slip enters the slip tube 11, through the auxiliary channels 9 into the intermediate chamber 8, which is constantly heated by the heater 13 to the working temperature of the slip, and the slip, being in it, are constantly mixed with a stirrer 14, and from the intermediate chamber 8 - through the casting channels 3 into the shaping cavities of the multi-seat form 2. After filling the shaping cavities with Schlicker through the inlet 6 through the cavity 5, tube-p diator 7 and the cavity 10 is fed ohlazhdayu.schuyu medium 4 cooled channel

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3 and 9, by the most converting the slip in them to the solid state.

The slurry 17 hardened in channels 3 and 9 interrupts the flow of the molten slip under the working pressure in the intermediate chamber 8, which makes it possible to separate the mold and remove the molded products 1. Cut off the sprues, i.e. The slurry hardened in the gating channels 3 from the molded products 1 occurs in the form itself during its separation by means of popping-off sleeves (not shown) according to the surface of the gating channels to the shaping cavities of the form.

After removing the products 1, the form 2 is connected again and in the cavities 5 and 10 the heating medium is again supplied, which, flowing through the tube-radiator 7, gives off heat until the tube heats up to the temperature of the flowing medium. Due to the fact that the heat capacity of the tube-radiator 7 is greater than the heat capacity of the auxiliary channels 9 with being located in them with a slip, until the tube-radiator 7 warms up to the temperature of the heating medium, a cooled medium will flow into the cavity 10. During this time, the solidified slip 17, located in the gating channels 3, melts completely, and in the auxiliary channels 9 it starts to warm up. The under-heated slip and the slip coming from the slip tube coming out of the channels 9 displaces the slip already heated to the working temperature from the intermediate chamber 8 and the sprues 3, which enter the mold cavities where quality products are formed.

Then in the cavities 5 and 10 cooling is applied, the mold is separated after cooling the products, the products are removed and the molding cycle is repeated. During the time between subsequent cycles, the insufficiently heated portions of slip 17 entering the intermediate chamber 8, equal to the volume of these channels, have time to take the required temperature and necessary casting properties by mixing, as the final filling of the shaping cavities, the slip reaches the intermediate chamber 8 operating parameters.

Claims (4)

1. A method of hot casting in a multi-place form, including feeding a slip into a multi-place form through a slip tube, lowered into a container with a melt of the slip through the sprue channels with the creation of pressure in this container, characterized in that, in order to ensure non-waste and defect-free molding of products, the slip from the slip tube to the gating channels of the multi-seat shape is fed through auxiliary channels through the intermediate chamber at a temperature equal to the working temperature of the slip, which is constantly mixed, and after filling the slurry sections located in the gating and auxiliary channels are turned into a solid state by forming cooling cavities, while the pressure in the container with the slurry is left unchanged when the molded products are removed, then the slurry in the gating and auxiliary channels hardened during the previous molding cycle they melt, the slip melted in the sprue channels together with the slurry received from the intermediate chamber under pressure are used for the next molding. 2. The method according to claim 1, with the fact that for the alternate melting of the hardened sections of the slip located in the gate and auxiliary channels, a heating medium is used. 3. A device for hot casting in a multi-unit mold containing a container with a molten slurry, a slip tube and a mold, characterized in that, in order to ensure waste-free and defect-free molding of products, it is equipped with an intermediate chamber with a stirrer and a heater connected on one side to the slip posredst- tube ² vom cavity with auxiliary channels, but on the other hand - to form the second cavity by a lit. an i 1/1 O nicks channels. 4. A device according to claim 3, wherein the cavities are communicated by a radiator tube.