Sand mixing technology for water jacket core in diesel engine cylinder cover casting blank

Abstract

The invention is mainly applied to the technical field of diesel engine cylinder covers and particularly relates to a sand mixing technology for a water jacket core in a diesel engine cylinder cover casting blank. The sand mixing technology is characterized by comprising the following steps that firstly, 45 parts to 55 parts of ceramsite, 20 parts to 30 parts of chromite sand and 20 parts to 30 parts of quartz sand are weighed and mixed, and the above sand is evenly mixed; secondly, furan resin accounting for 1% to 3% of the mass of the above mixed sand is weighed, and para-toluenesulfonic acid accounting for 75% to 85% of the mass of the furan resin is weighed; thirdly, the weighed para-toluenesulfonic acid is poured into a molding sand mixing stirring machine to be stirred; and fourthly,the weighed furan resin is poured into the molding sand mixing stirring machine to be stirred, after the sand, the resin and the acid are evenly mixed, and the mixture is received through a sand hopper and is used for make preparation to forge the core. By means of the improvement on the sand mixing technology, the cleaning effect of a large water jacket cavity and a small water jacket cavity ofa cylinder cover is good, and the problem of sand sticking of the large water jacket cavity and the small water jacket cavity is solved. The problem that sand is wrapped in iron of the interior is completely solved.

Description

technical field [0001] The invention relates to a sand mixing process for a water jacket core in a casting blank of a cylinder head of a diesel engine, which is mainly used in the technical field of the cylinder head of a diesel engine. Background technique [0002] At present, the casting blanks of large marine diesel engine cylinder heads are mostly made of nodular cast iron and vermicular graphite cast iron, and resin sand is used for manual molding. When the large and small water jacket sand cores of the cylinder head are made of ordinary quartz sand, large and small water jackets are prone to occur after the blank is cleaned. Cavity sticky sand defects, and some places even have serious iron-clad sand phenomenon, which hinders or even blocks the water stringing effect of the cylinder head. At present, the improvement of water jacket core in China is mainly to improve the sand core into hot core box coated sand to increase sand strength and anti-sintering ability, but th...

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is: to provide a method to improve the water cooling effect of the cylinder head, the large and small water jacket cavities are cleaned and smooth, which can solve the proble