CN201186348Y - Vacuum upper suction casting equipment - Google Patents

Abstract

The utility model discloses a vacuum suction casting equipment, which is composed of a smelter, a casting mold, a casting chamber, a magnetic valve, a negative pressure cabin, a delivery valve, a vacuum pump and a high temperature hot-gas valve, wherein the casting mold is composed of a main flow passage, a pouring head and a mold cavity, wherein the pouring head is obliquely intersected with the main flow passage from bottom to top, a top cover which is provided with a plurality of millipores is covered on the main passage, a suction tube is downwards extended form the main passage, and the suction tube can extend into the smelter. Since the equipment utilizes the vacuum pump to pump the vacuum in the casting chamber, utilizes the air permeability of the mold cavity to form the atmospheric pressure difference between the surfaces of smelting metals, and compels molten metal to enter the mold cavity, after the negative pressure in the casting chamber is disappeared, the molten metal in the main flow passage flows back to the smelter under the function of the gravity, thereby no remained metallic waste materials are existed in the main flow passage, and the cost is saved, furthermore, since the equipment utilizes the negative pressure to pump out air and water in the die cavity, thereby the casted metallic pieces have no air bubble and the products have high quality.

Description

The vacuum updraught Casting Equipment

Technical field

The utility model relates to a kind of machine casting field, particularly relates to a kind of vacuum updraught Casting Equipment.

Background technology

At present, in the metalwork manufacturing, mostly adopt traditional type sand casting mold to cast, this casting mold is mainly by runner, cast gate, die cavity constitutes, in casting process, runner and the remaining a large amount of waste material of cast gate meeting, though for general metal casting, these waste materials are to reclaim, but contain the metal casting of trace element for some, after waste material melted down again, its trace element meeting loss was in order to keep the micro-ratio in the metal material, will add trace element again, as nickeliferous stainless steel material, waste material melts down the back just needs to add trace element, thereby increases the cost of material.

The utility model content

The purpose of this utility model is to provide the vacuum updraught that a kind of waste material is few, product quality is high Casting Equipment.

For achieving the above object, technical solution of the present utility model is:

The utility model is a kind of vacuum updraught Casting Equipment, and it mainly is made up of smelting furnace, mold, casting chamber, magnetic valve, negative pressure cabin, air bleeding valve, vavuum pump, high temperature hot gas valve; Described casting chamber is connected by pipeline with the negative pressure cabin, and magnetic valve and Pressure gauge are installed on this pipeline, connects air bleeding valve and high temperature hot gas valve on the negative pressure cabin; Vavuum pump connects the negative pressure cabin by pipeline;

Described mold is made of sprue, cast gate and die cavity, cast gate intersects with sprue is oblique from bottom to top, its angle is an acute angle, die cavity is positioned at the below of cast gate and sprue junction, connect a top cover with many small guide holes at the upper end cover of sprue, sprue extends downwards inhales flow-path tube on one, when mold is placed on the casting chamber of casting chamber, should go up inhale flow-path tube and pass the outlet on the bottom surface of casting chamber and stretch into the smelting furnace that is positioned at below, casting chamber, the asbestos pad that seals in this exit socket one.

Described top cover with many small guide holes is that high temperature alumina silicate or ceramic fibre are made.

After adopting such scheme, because the utility model is to utilize vavuum pump that the chamber of casting is vacuumized, utilize the gas permeability of mold cavity, air pressure in the mold cavity is reduced, atmospheric pressure between formation and the smelting metal surface is poor, force the molten metal self-straw, sprue, cast gate enters mold cavity, after casting chamber negative pressure disappears, molten metal in the sprue can be back in the smelting furnace under the effect of gravity, making does not have remaining scrap metal existence in the sprue, thereby significantly reduced the generation of waste material, this is for titaniferous, the casting of the stainless steel material of nickel can reduce the loss of trace element, the interpolation titanium defaults, the cost of trace element such as nickel, save cost, reduce power consumption, but power saving 50%.In addition, because the utility model is extracted the air in the die cavity, steam out earlier by negative pressure, the metalwork density that casting is come out evenly, does not have bubble and produces, the product quality height.

Below in conjunction with the drawings and specific embodiments the utility model is further described.

Description of drawings

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the cutaway view of the utility model casting chamber.

The specific embodiment

As shown in Figure 1, be a kind of vacuum updraught Casting Equipment that realizes above-mentioned technology, it mainly is made up of smelting furnace 1, mold 2, casting chamber 3, Pressure gauge 4, magnetic valve 5, air bleeding valve 6, negative pressure cabin 7, vavuum pump 8 and high temperature hot gas valve 9, vacuum pump valve 11 and vacuum pump pressure table 12.

Described casting chamber 3 is connected by pipeline 10 with negative pressure cabin 7, and magnetic valve 5 and Pressure gauge 4 are installed on this pipeline 10, connects air bleeding valve 6 and high temperature hot gas valve 9 on negative pressure cabin 7, also connects inflating pump 13 on air bleeding valve 6.Vavuum pump 8 has three, connects negative pressure cabin 7 by pipeline 20, is provided with vacuum pump valve 11 and vacuum pump pressure table 12 on pipeline 20.

As Fig. 2 with reference to shown in Figure 1, described mold 2 by sprue 21, cast gate 22, die cavity 23, on inhale flow-path tube 24 and constitute.Cast gate 22 is oblique crossing with sprue 21 from bottom to top, its angle α is an acute angle, die cavity 23 is positioned at the below of cast gate 22 and sprue 21 junctions, upper end cover at sprue 21 connects a top cover 25, this top cover 25 is made by high temperature alumina silicate or ceramic fibre, has many small guide holes, so as air can from this small guide hole by and molten metal can not pass from this small guide hole, also cover in the upper end of top cover 25 and to connect a vacuum chamber cover plate 31, the chamber 3 of will casting is airtight; Sprue 21 extends downwards inhales flow-path tube 24 on one, inhale flow-path tube 24 on this and communicate with sprue 21.When casting, mold 2 is placed in the casting chamber 3, on inhale flow-path tube 24 and pass the outlet on casting chamber 3 bottom surfaces and stretch into the smelting furnace 1 that is positioned at casting 3 belows, chamber, seal and can resistant to elevated temperatures asbestos pad 26 in this exit socket one.

The course of work of the present utility model (shown in Figure 2) as Fig. 1 reference:

(1), mold 2 is positioned in the casting chamber 3, what communicate with sprue 21 go up to inhale flow-path tube 24 down, moves to smelting furnace 1 top then.

(2), close magnetic valve 5, air bleeding valve 6, high temperature hot gas valve 9, open vavuum pump valve 11.

(3), start vavuum pump 8, negative pressure is extracted in negative pressure cabin 7, when vacuum pump pressure table 12 reaches predetermined pressure, close vavuum pump 8.

(4), mold 2 slow declines make in the molten metal of inhaling flow-path tube 24 insertion smelting furnaces 1.

(5), open magnetic valve 5, make casting chamber 3 and 7 conductings of negative pressure cabin, in casting chamber 3, produce negative pressure, make air decompression in the casting chamber 3, utilize the gas permeability of mold 2 die cavities 23 and the small guide hole on the top cover 25, air pressure in mold 2 die cavities 23 is reduced, and the atmospheric pressure between formation and the smelting metal surface is poor, forces molten metal to enter die cavity 23 from last suction flow-path tube 24, sprue 21, cast gate 22.

(6), treat that molten metal is full of die cavity 23, raise up back cast of Pressure gauge 4 finishes.Open the air bleeding valve 6 on the negative pressure cabin 7, cold air enters negative pressure cabin 3 and casting chamber 3, make the molten metal of staying in the sprue 21 under the effect of gravity, be back in the smelting furnace 1, and die cavity 23 molten metals can not flow into sprue 21 and are trapped in the die cavity 23 because cast gate 22 intersects with sprue 21 is oblique from bottom to top.

(7), valve-off 5 and 11, unlatching air bleeding valve 6 reaches the high temperature hot gas valve 9 on the negative pressure cabin 7 that communicates with casting chamber 3, starts the inflating pump 13 that links to each other with air bleeding valve, inflates to the negative pressure cabin by inflating pump, discharge hot gas and impurity, make to keep pressure-less state in the negative pressure cabin 7.

Emphasis of the present utility model just is: the cast gate of mold intersects with sprue is oblique from bottom to top, and is used to settle the casting chamber of mold to be connected by pipeline with the negative pressure cabin, and the casting chamber can form negative pressure.

Claims (2)

1, a kind of equipment of realizing the described vacuum updraught casting technology of claim 1 is characterized in that: it mainly is made up of smelting furnace, mold, casting chamber, magnetic valve, negative pressure cabin, air bleeding valve, vavuum pump, high temperature hot gas valve; Described casting chamber is connected by pipeline with the negative pressure cabin, and magnetic valve and Pressure gauge are installed on this pipeline, connects air bleeding valve and high temperature hot gas valve on the negative pressure cabin; Vavuum pump connects the negative pressure cabin by pipeline;

Described mold is made of sprue, cast gate and die cavity, cast gate intersects with sprue is oblique from bottom to top, its angle is an acute angle, die cavity is positioned at the below of cast gate and sprue junction, connect a top cover with many small guide holes at the upper end cover of sprue, sprue extends downwards inhales flow-path tube on one, when mold is placed on the casting chamber of casting chamber, should go up inhale flow-path tube and pass the outlet on the bottom surface of casting chamber and stretch into the smelting furnace that is positioned at below, casting chamber, the asbestos pad that seals in this exit socket one.

2, vacuum updraught Casting Equipment according to claim 1 is characterized in that: described top cover with many small guide holes is that high temperature alumina silicate or ceramic fibre are made.

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