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Method of casting thick-wall casting through sand insulation cold iron

A technology for sand-separated cold iron and thick-walled castings, which is applied in the field of casting thick-walled castings, can solve the problems of time-consuming and labor-intensive production, high casting production costs, and achieve the effects of reducing production costs, improving cleaning efficiency, and reducing usage

Active Publication Date: 2013-06-05
KOCEL EQUIP
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Problems solved by technology

Not only the production cost of castings is high, but also the imprint of direct cooling chilled iron on castings is time-consuming and labor-intensive in the later stage

Method used

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  • Method of casting thick-wall casting through sand insulation cold iron
  • Method of casting thick-wall casting through sand insulation cold iron
  • Method of casting thick-wall casting through sand insulation cold iron

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Embodiment Construction

[0017] A method for casting thick-walled castings using sand-separated cold iron, the method is sequentially mold making, molding, core making, box closing, pouring and sand cleaning, such as figure 2 Shown: Before modeling, place the sand-insulated chill iron 1 on the hot joint, that is, the thick part of the casting 2, and then fix it with the boss of the sand-insulated chill iron, and put the boss on the sand-insulated chill iron close to the casting pattern of the casting Place it so that the three bosses of the sand-isolated chill iron are all close to the pattern. After placing the sand-isolated chill iron, use a rectangular strip to compact the sand layer between the chill iron and the casting pattern of the casting. The vibrating compaction platform performs micro compaction on the molding sand. The vibration frequency is 50HZ, and the micro vibration is compacted for 30 seconds. After standing for 2 hours, the box is opened, and after the box is closed, the molten iro...

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Abstract

The invention relates to a casting method of a thick-wall casting, in particular to a method of casting the thick-wall casting through sand insulation cold iron. The method sequentially comprises mould manufacturing, modeling, core manufacturing, mould assembling, pouring and falling sand cleaning. The method is characterized in that the sand insulation cold iron is placed on a thermal center portion, namely the thick portion of the casting before modeling, a boss of the sand insulation cold iron is used for fixation, and the boss of the sand insulation cold iron is placed close to a casting format of the casting. After the sand insulation cold iron is placed, quicksand is conducted, comprehensive tiny compaction of moulding sand is conducted through a vibration ramming platform, the mould is opened after being placed for two hours, and after mould assembling, iron liquid after nodulizing inoculation is poured into the mould. The method is unique in technique, can guarantee quality of the casting, shortens the production period, improves production efficiency, and saves production cost. The method not only saves the production cost, but also reduces casting surface cleaning work and work intensity.

Description

technical field [0001] The invention relates to a method for casting thick-walled castings, in particular to a method for casting thick-walled castings using sand-separated chill iron. Background technique [0002] The minimum wall thickness of the casting is 40mm, the maximum is 180mm, and the main wall thickness reaches 80mm. It belongs to ductile iron parts with thick and large cross-section. Due to the large cross-section and slow cooling rate, the solidification time is long, and graphite distortion, graphite floating and spheroidization recession are prone to occur in castings, especially at the center of wall thickness or hot joints. The thick and large parts of the casting are generally forced to cool with direct cooling chilled iron to achieve the purpose of sequential solidification of the casting and eliminate shrinkage porosity and shrinkage cavity inside the casting. A large number of direct cooling chillers are used for forced cooling of castings. Because of t...

Claims

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Application Information

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IPC IPC(8): B22D15/00
Inventor 李旭曹玉华陈阵
Owner KOCEL EQUIP
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