Baking process of profile and sand core, made from resin sand, of natural gas power cylinder body

Abstract

The invention discloses a baking process of a profile and a sand core, made from resin sand, of a natural gas power cylinder body, aiming at overcoming the casting defects of pores, pin holes and the like of existing baking processes of a profile and a sand core, made from resin sand, of a natural gas power cylinder body. The baking process comprises the steps of putting the profile and the sand core, made from the resin sand, of the natural gas power cylinder body into a drying oven; heating up to 210-230 DEG C, and carrying out heat preservation for 3.5h-4.5h; and adjusting the temperature to 95-105 DEG C, and carrying out heat preservation until mould assembling. The baking process can reduce the water content and the gas displacement of the profile and the sand core, overcomes the casting defects of pores, pin holes and the like of existing resin sand profiles, and improves the casting quality. The baking process not only is suitable for baking of the profile and the sand core, made from the resin sand, of the natural gas power cylinder body, but also is suitable for baking of profiles and sand cores made from other resin.

Description

technical field [0001] The invention belongs to the technical field of natural gas power cylinder body, and in particular relates to a baking process of a natural gas power cylinder body shape and a sand core made of resin sand. Background technique [0002] In the prior art, natural gas is mainly compressed by a pipeline release steam turbine and a centrifugal natural gas compressor. [0003] At present, domestic and foreign natural gas compressors are mainly divided into high-speed and high-power reciprocating piston compressors and low-speed reciprocating compressors. Among them, the high-speed and high-power reciprocating piston compressor, with a speed n of 1000r / min and a power P of 6000kW, is mainly used for natural gas gathering and transportation pressurization and gas injection in gas storage. It is an indispensable equipment for natural gas exploration, development and storage . The power cylinder is the main part of the natural gas compressor to provide power d...

AI Technical Summary

Problems solved by technology

[0008] In order to solve the defects in the prior art, the present invention provides a baking process for the external shape and sand core of the natural gas powered cylinder made of resin sand, which solves the problem of the external shape and sand core of the natural gas powered cylinder made of the existing resin sand. Gas needles and casting defects with many pinholes in the baking process