Evanescent mode production process of engine cylinder body

Abstract

The invention discloses an evanescent mode production process of an engine cylinder body, belonging to the technical field of evanescent mode production processes. The evanescent mode production process comprises the steps of: S1, a bead pre-frothing process; S2, a white mode forming process; S3, a drying treating process for drying a white mode; S4, a mode sticking process; S5, a coating dip-coating process; S6, a drying process after dip-coating; and S7, a modeling and casting process. According to the evanescent mode production process, phenomena of sand burning and water leakage can be effectively prevented, and thus the qualified rate of produced engine cylinder bodies of automobiles is increased.

Description

technical field [0001] The invention relates to a production process of lost foam, in particular to a production process of lost foam of an automobile engine cylinder. Background technique [0002] The lost foam casting method is also called the full mold casting method. It is usually embedded in a sand casting mold by the lost foam formed by polystyrene foam, pouring molten metal, and the lost model will be vaporized and disappeared due to the heat of the molten metal. A method of filling the resulting voids with molten metal to produce a cast product. [0003] For example, the invention patent of the patent number 01819493 discloses a lost pattern casting method, mainly through the gas generated by the disappearance of the model, through the exhaust channel with the exhaust gas suppression mechanism, it is relieved to the outside of the mold, and the casting is carried out at the same time; the patent number is 02823032 The invention patent discloses a lost foam casting m...

AI Technical Summary

Problems solved by technology

[0004] At present, few manufacturers in China use the lost foam process to produce engine cylinders, and the output is very small. The main reasons for the limitation are: on the one hand, sand sticking in the water chamber and tappet chamber of the cylinder body is particularly serious during the production process, which affects The water circulation of the cylinder body is improved; on the other hand, after the leak test of the crankshaft chamber of the casting, a large number of products leak water, which leads to the scrapping of the cylinder body

The invention patent with the patent number of 200310121116 discloses a lost foam casting method of an automobile engine cylinder block, which mainly uses pre-filling sand in the cavity in the middle part of the model before the lost foam model is cast in the sand box, and then pre-vibrates Tighten, and finally pre-vacuumize, which solves the problem that the core part disappears due to the double envelopment of sand, so that the vaporized gas is not easy to discharge, so that the casting does not produce wrinkled skin and bright charcoal, but there is no description of the technology to solve the problem of sand sticking and water leakage Program