Casting method

A casting method and casting mold technology, which is applied in the direction of casting molding equipment, casting molds, casting mold components, etc., can solve the problems of complicated follow-up processes such as parting and product separation, which have not been disclosed or implemented, and low injection qualification rates

Inactive Publication Date: 2008-09-10
五家 政人
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the injection pass rate represented by the product part weight / total injection weight is low, and subsequent processes such as mold separation and product separation are also very complicated.
[0027] As above, the casting method of filling only the cavity part expected in the existing casting method has not been disclosed or practiced at all.

Method used

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Examples

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Embodiment 1

[0142] figure 1 and figure 2 Example 1 is shown. For method 1 in this example, start pouring molten metal approximately equal to the volume of the desired cavity portion to be filled with molten metal into the cavity of the air-permeable mold, and then send compressed gas from the gate. A casting method in which molten metal is filled into a desired cavity and solidified will be described.

[0143] Firstly, the structure of the casting mold 1 will be described. The casting mold 1 is a sand mold, which is molded in the upper frame 2 and the lower frame 3, and placed on the mold base 4 after the molds are closed. The mold cavity 7 is composed of a gate part 8 , a runner part 9 and a product part 11 . Generally, a riser portion is often provided between the runner portion 9 and the product portion 11 , but this case is a case of a mold without a riser portion.

[0144] In this embodiment, a casting method will be described in which only the product part 11 itself, which is t...

Embodiment 2

[0154] image 3 and Figure 4 Example 2 is shown. In this example, method 2 is used to describe a casting method in which a compressed gas is fed to fill a desired cavity portion with molten metal after pouring starts, and the molten metal is solidified while the compressed gas is fed.

[0155] image 3 The state after pouring the molten metal 30 into the product part 11 which is the desired cavity part 12 is shown. The configuration of the mold 1 and the cavity 7 is the same as that of the first embodiment, and an iron cover member 18 is placed on the upper part of the upper frame 2 for airtightness. The covering member 18 is provided to make the pressure of the compressed gas more effective. The cover member 18 is preferably made of a non-ventilated material, but the same effect can be obtained with a material having less air permeability than the mold.

[0156] image 3 The state after pouring is the same as that shown in Example 1, the pouring amount is only the prod...

Embodiment 3

[0162] Figure 5 and Figure 6 Example 3 is shown. In this embodiment, using method 3, a part of the desired cavity portion to be filled is located in the upper mold, and in the case of a certain height, the pressurization pressure of the compressed gas is clearly specified, and the molten metal is filled to the desired Desired cavity parts and solidified casting methods are described.

[0163] Such as Figure 5 As shown, the composition of the casting mold 1 is substantially the same as that of the embodiment 2, and the casting mold cavity 7 is composed of a gate part 8 , a runner part 9 , a riser part 10 and a product part 11 . In addition, the product part 11 is arranged in the upper mold 5 and the lower mold 6 and the height of the upper mold part is H. In the present embodiment, the product part 11 and the riser part 10 are filled with molten metal as the desired cavity part 12 and solidified. The aforementioned height H corresponds to the height of the molten metal ...

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Abstract

To provide a casting method based on gravity casting with an air-permeable mold, wherein a melt is charged into only a desired part of the mold cavity and solidified. [MEANS FOR SOLVING PROBLEMS] A melt in a volume approximately equal to the volume of a cavity part which is desired to be filled with the melt is poured. Thereafter, a compressed gas is supplied through the melt-inlet part to fill the desired cavity part with the melt. The melt is then solidified. According to need, the cavity is evacuated before and after the casting.

Description

technical field [0001] The present invention relates to a high-precision and high-productivity casting method. The casting method is a casting method in which gravity pouring is performed from the upper part or the side part of the mold of an air-permeable mold. Background technique [0002] Molds molded (molded) using sand are the most common air-permeable molds, and molds molded using ceramic particles or metal particles are also widely used. In addition, even if a mold such as gypsum is basically not air-permeable, a mold in which air-permeability is imparted by mixing or partially using an air-permeable material can also be regarded as an air-permeable mold. In addition, even in the case of a metal mold with no air permeability at all, a mold provided with vent holes or vent holes to impart air permeability can be regarded as an air-permeable mold. The air-permeable casting mold of the present invention is a casting mold including the above-mentioned air-permeable casti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D18/04
CPCB22D18/04B22C9/02B22D27/13B22C9/082B22D27/15
Inventor 五家政人
Owner 五家 政人
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