Process of casting cylinder head of diesel engine

A cylinder head and diesel engine technology, which is applied to casting molding equipment, casting molds, casting mold components, etc., can solve the problems of low inner cavity smoothness and loose tissue, and achieve the effect of simple and practical operation, reducing shrinkage porosity and ensuring smoothness.

Inactive Publication Date: 2007-11-07
CSSC MARINE POWER
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Problems solved by technology

[0005] In order to overcome the above-mentioned technical difficulties, the object of the present invention is to propose a L21 / 31 cylinder head casting process that improves the production yield, and solves the loose structure and low inner cavity finish of the L21 / 31 cylinder head during the casting production process. casting problem

Method used

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  • Process of casting cylinder head of diesel engine
  • Process of casting cylinder head of diesel engine
  • Process of casting cylinder head of diesel engine

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Embodiment Construction

[0020] As shown in Figure 1, a two-box molding and bottom pouring gating system is adopted.

[0021] Its technological process is:

[0022] (1) Manufacture the mold according to the casting process drawing.

[0023] (2) Modeling and core making. Due to the use of resin sand for production, attention should be paid to the air outlet of the mud core, the compactness of the sand core and the accuracy of the position of the cold iron during the molding and core making process, and the curing speed of the core sand should be moderate.

[0024] (3) Drying of molds and sand cores. In order to ensure that the mold and sand core are thoroughly baked, dried, and not cracked, the heating and cooling speeds must be strictly controlled. For details, see Figure 2, the resin sand drying process specification.

[0025] (a) Heating stage: In order to prevent the mold and sand core from cracking, the heating rate is controlled below 250°C / hour;

[0026] (b) Heat preservation stage: In orde...

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Abstract

The present invention belongs to the field of casting technology, and is especially process of casting cylinder head of diesel engine. The process is one bottom pouring one including molten iron introduction from the bottom for smooth filling and fluent air exhaustion, applying iron chills in the heat centers to homogenize the cooling speed of different parts, and self shrink feeding of the casting to reduce inside shrinkage porosity and raise inherent quality of the casting. The present invention has high casting quality.

Description

technical field [0001] The invention belongs to casting technology, in particular to a casting process of a cylinder head of a core part of a diesel engine, in particular to a casting method of a cylinder head of a diesel engine. Background technique [0002] The cylinder head is a cutting-edge technology recognized in the domestic foundry industry, and the diesel engine cylinder head is one of its main representative parts. The complex inner cavity structure, the characteristics of large wall thickness difference and the material of ductile iron will easily lead to a high scrap rate of the product. As a result, the manufacturing cost of the cylinder head is very high. [0003] The cylinder head is one of the key parts of the diesel engine. Its quality directly affects the performance and service life of the diesel engine. Therefore, manufacturers have always paid great attention to the manufacturing technology of the cylinder head. [0004] The L21 / 31 cylinder head is the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D25/00B22D23/00B22C9/10
Inventor 李铜海张青松查达喜钮荣华
Owner CSSC MARINE POWER
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