Casting moulding process for preparing large ship propeller from synthetic resin

Abstract

The invention discloses a casting moulding process for preparing a large ship propeller from synthetic resin, which comprises the following steps of: A, moulding blades, namely manufacturing wood-based sections of the blades by using a wood-based machine center, making the wood-based sections have lattice shapes, filling resin sand in lattice-shaped brackets, scraping uniformly for curing, fixing the blade brackets in a core box on a blade moulding platform in a cross way, and assembling a mould by taking the center line on a mould assembling platform and base lines of blade moulds as references; B, drying the mould, namely naturally drying the blade moulds which are not subjected to mould assembling, forcibly drying the interiors of a runner and a cavity by using a blast stove until the interiors are fully dried, and keeping constant temperature of the interiors; and C, heating a riser, namely arranging a riser heater on the upper part of the riser, heating the riser in an electric heating mode, and stopping heating until the riser is completely solidified and cooled. The casting moulding process meets the requirement on dimension of the integral mould by methods such as separate moulding, unified manufacture, positioning and mould assembling, and the like.

Description

technical field [0001] The invention relates to a casting molding process for making a large marine propeller by using synthetic resin. Background technique [0002] The production material of marine propellers is mainly copper alloy. The appearance of the propeller is three-dimensional streamlined, and the thickness gradually decreases from the blade root to the blade tip. Generally, the molding material of marine propellers is mainly cement. The overall mold cavity is dried and poured at high temperature. After complete cooling, post-processing is carried out to complete the production of blank parts. There are also synthetic resins used as binders to make moldings. Many companies use integral molding methods, which not only require a lot of measuring tools for continuous measurement, but also take a long time to make, and the workability is not good. Well, it makes it difficult to get the shape we expect. After the molding is completed, if the impurities and moisture insi...

AI Technical Summary

Problems solved by technology

[0002] The production material of marine propellers is mainly copper alloy. The appearance of the propeller is three-dimensional streamlined, and the thickness gradually decreases from the blade root to the blade tip. Generally, the molding material of marine propellers is mainly cement. The overall mold cavity is dried and poured at high temperature. After complete cooling, post-processing is carried out to complete the production of blank parts. There are also synthetic resins used as binders to make moldings. Many companies use integral molding methods, which not only require a lot of measuring tools for continuous measurement, but also take a long time to make, and the workability is not good. Well, it makes it difficult to get the shape we expect. After the molding is completed, if the impurities and moisture inside the cavity are not completely removed, it will lead to casting defects. In addition, if the air humidity is high, although some drying methods are used, it cannot be completely Remove the water contained in the surface of the shape of the leaf tip, and manage the riser after pouring. In order to ensure directional solidification and reduce the probability of casting defects, in addition, add melt and heating agent to the riser during the solidification process. The feeding effect is better, but it is difficult to manage the temperature and solidification height, so it is not easy to work

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