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Suction casting method and suction casting apparatus

A suction device, suction port technology

Inactive Publication Date: 2002-10-23
CENTRAL MOTOR WHEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, in the aforementioned metal molds, there is a problem that the fluidity of the molten metal decreases in the part where the temperature of the metal mold is low. , the fluidity of the molten metal is worse than that of the horizontal metal type 109, such as Figure 7 As shown, a space A is created between the surface of the upper metal mold 110 and the casting 119
Therefore, this space A becomes a thermal insulation layer, producing such as Figure 7 Problems with casting defects (porosity) B shown
[0006] In addition, as in the above-mentioned device with high negative pressure on the joint surface 117, it is also because the pressure of the entire area in the chamber 112 is the same, and the air in the space A generated above cannot be discharged, and the aforementioned casting defect B still occurs. question

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  • Suction casting method and suction casting apparatus
  • Suction casting method and suction casting apparatus
  • Suction casting method and suction casting apparatus

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Embodiment Construction

[0027] according to figure 1 and Figure 5 The ideal embodiment shown illustrates the implementation status of the present invention.

[0028] Figure 1 ~ Figure 4 Example 1 is shown.

[0029] The illustrated embodiment is a casting example in which the present invention is applied to an automobile wheel.

[0030] exist figure 1 , the holding furnace 1 is filled with molten aluminum. The upper portion of the aforementioned holding furnace 1 is provided with a lower support plate 3, on which a furnace side burner 4 is installed. The metal mold 5 is composed of a lower metal mold 6, a horizontal metal mold 7, and an upper metal mold 8 which fits in the horizontal metal mold 7 from above, and a bottom annular chamber 9 is formed inside it. The chamber 9 is formed in the shape of a car hub.

[0031] The lower mold 6 forms a mold side gate 6 a connected to the furnace side gate 4 .

[0032] The upper surface of the aforementioned lower metal mold 6 and the lower surface o...

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Abstract

One suction casting method is to form a first suction opening 10 between the horizontal metal mold 7 and the peripheral protrusion 8a of the upper metal mold 8 . A knockout rod insertion hole 11 is formed in the peripheral protrusion 8 a of the upper mold 8 forming the upper end of the chamber 9 . Insert stripping rod 12 in this hole 11. A second suction port is formed between the hole 11 and the rod 12 . Or do not use the stripping rod 12, and configure the gas-permeable sintered metal to form many air holes as the second suction port. The suction negative pressure of the second suction port 14 is set higher than the negative pressure of the first suction port 10, and due to the high negative pressure of the second suction port 14, the air remaining on the low-temperature type surface 8b of the upper metal mold 8 can be prevented.

Description

technical field [0001] The invention relates to a suction casting method and a suction casting device. Background technique [0002] In the past, in the suction casting method in which the molten metal is drawn into the chamber by negative pressure from the gate of the metal mold, such as the suction casting device for the wheel hub of the automobile, there are Figure 6 and Figure 7 construction shown. [0003] In this structure, a lower supporting plate 102 is arranged on the upper part of the holding furnace 101, and a furnace side gate 103 is arranged, and a metal side gate 104 and a metal mold 105 connected to the aforementioned furnace side gate 103 are arranged on the upper part of the lower supporting plate 102, The periphery of this metal mold 105 is surrounded by box body 106 and loam cake 107, depressurizes (negative pressure) in box body 106, 107 with suction pump 108, passes through the gap D between horizontal metal mold 109 and upper metal mold 110 1 And th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D17/22B22D18/06
CPCB22D18/06
Inventor 阪部春之泽田智和升田隆一漆谷广行
Owner CENTRAL MOTOR WHEEL CO LTD