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Casting method for ultra-large heavy-wall nodular iron castings

A technology for squash and iron pieces, which is applied in the casting field of super-thick-walled ductile iron pieces, can solve the problems of large volume and difficult casting cavity, and achieve the effects of low casting cost, convenient operation and guaranteed cooling.

Active Publication Date: 2016-06-15
阳泉市煜昌机械制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the technical problem that super large thick-walled ductile iron castings require no more than 120 minutes of solidification time of ductile iron, and it is difficult to manufacture casting mold cavity due to its large volume. A Casting Method of Super-large Thick-walled Ductile Iron Parts

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The casting method of super large thick-walled nodular iron parts in the present embodiment, it comprises the following steps:

[0022] 1) Manufacture the wooden pattern of the casting;

[0023] 2) Paste a 6-10mm thick pattern sheet on the surface of the wooden pattern of the casting;

[0024] 3), using the sand box casting method, the casting wooden pattern with the pattern thin plate is used as a sand core to make a cast iron cavity sand box with cooling fins on the outer wall;

[0025] 4), the cast iron cavity flask is installed on the formwork provided with the wooden pattern of the casting, so that the gap of the thickness of the pattern sheet is formed between the wooden pattern of the casting and the cavity of the cast iron cavity flask;

[0026] 5) Spray the wet-type coated sand into the gap between the wooden pattern of the casting and the cavity of the cast iron cavity sand box to ensure that the wet-type coated sand in the gap is filled evenly, densely and t...

Embodiment 2

[0035] The casting method of super large thick-walled nodular iron parts in the present embodiment, it comprises the following steps:

[0036] 1) Manufacture the wooden pattern of the casting;

[0037] 2) Paste a 10mm thick pattern sheet on the surface of the wooden pattern of the casting;

[0038] 3), using the sand box casting method, the casting wooden pattern with the pattern thin plate is used as a sand core to make a cast iron cavity sand box with cooling fins on the outer wall;

[0039] 4), the cast iron cavity flask is installed on the formwork provided with the wooden pattern of the casting, so that the gap of the thickness of the pattern sheet is formed between the wooden pattern of the casting and the cavity of the cast iron cavity flask;

[0040] 5) Spray the wet-type coated sand into the gap between the wooden pattern of the casting and the cavity of the cast iron cavity sand box to ensure that the wet-type coated sand in the gap is filled evenly, densely and tig...

Embodiment 3

[0049] The casting method of super large thick-walled nodular iron parts in the present embodiment, it comprises the following steps:

[0050] 1) Manufacture the wooden pattern of the casting;

[0051] 2) Paste a 6mm thick pattern sheet on the surface of the wooden pattern of the casting;

[0052] 3), using the sand box casting method, the casting wooden pattern with the pattern thin plate is used as a sand core to make a cast iron cavity sand box with cooling fins on the outer wall;

[0053] 4), the cast iron cavity flask is installed on the formwork provided with the wooden pattern of the casting, so that the gap of the thickness of the pattern sheet is formed between the wooden pattern of the casting and the cavity of the cast iron cavity flask;

[0054] 5) Spray the wet-type coated sand into the gap between the wooden pattern of the casting and the cavity of the cast iron cavity sand box to ensure that the wet-type coated sand in the gap is filled evenly, densely and tigh...

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Abstract

The invention discloses a casting method for ultra-large heavy-wall nodular iron castings, belongs to the technical field of casting on the ultra-large heavy-wall nodular iron castings, and aims at solving the technical problems that the requirement that solidification time of nodular iron shall not exceed 120 minutes cannot be met by the ultra-large heavy-wall nodular iron castings, and casting cavities are hard to manufacture due to the ultra-large heavy-wall nodular iron castings are huge in size. The casting method comprises a step of manufacturing a casting wood pattern, a step of manufacturing a cast iron cavity mould box of which the outer wall is provided with a heat dissipation wing by utilizing a mould box casting method by taking the casting wood pattern to which a pattern sheet is attached as a sand core, a step of filling the cast iron cavity mould box with wet pre-coated sand, a step of manufacturing a cast iron cavity mould box with a pre-coated sand layer and a step of mould closing and pouring. The wet pre-coated sand is adopted by the casting method disclosed by the invention, which is more conductive to manufacturing the cavities; moreover, the castings can be cooled more rapidly by utilizing the cast iron cavity mould box with the heat dissipation wing; and a self-heating iron pattern in a traditional pre-coated sand casting process is replaced with the wood pattern, so that manufacturing cost is greatly reduced, and the defect that the traditional pre-coated sand casting process only can be used for casting small castings is overcome.

Description

Technical field [0001] The present invention is a large -scale thick -thick till ironing casting technology field, which involves a large thick and thick -quality iron and iron parts. Background technique [0002] Casting is a method of casting liquid metal into the casting cavity that is compatible with the shape of the parts. After it is cooled and solidified, it obtains parts or rough.Casting is the basic process of modern machinery manufacturing industry, but the iron parts weighing more than 10 tons and the wall thickness of 150 to 630㎜ are used as a large thick wall thick casting, which has always been a technical problem in the field of casting.The iron solidification time must not exceed 120min, and the large thick wall thick casting itself is difficult to manufacture and manufactured. Invention content [0003] The purpose of the present invention is to solve the technical problem of the large thick wall ball iron casting requiring the iron coagulation time of the ball,...

Claims

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Application Information

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IPC IPC(8): B22C9/02B22C9/22B22C9/20
CPCB22C9/02B22C9/20B22C9/22
Inventor 马成敏邓先康
Owner 阳泉市煜昌机械制造有限公司
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