Efficient multipart multilayer stacked pouring system and technology

Abstract

The invention discloses an efficient multipart multilayer stacked pouring system and technology. The system is characterized in that the pouring system is divided into a plurality of layers which are stacked; a sprue is arranged in each layer, and the sprues are cavities with pouring gates at the upper ends and the lower ends; the pouring gate of the pouring system body on the top layer is sleeved with a pouring gate cup, and the pouring gate at the lower end of each layer of pouring system body is arranged on the pouring gate at the upper end of the next layer of pouring system body in a sleeving manner; and the pouring gate of the bottom layer of pouring system body is sealed. Two or more transverse sprues are evenly distributed on the inner sides of the sprues, and are led to the inner pouring gates; and the inner pouring gates are communicated with product sand mould cavities; and the transverse sprues are circular-arc cavities, and slag accumulating plates are arranged on the inner walls of the cavities at the circular-arc upper ends of the transverse sprues. According to the efficient multipart multilayer stacked pouring system, each of the multiple layers of stacked pouring system bodies is provided with a plurality of inner pouring gates to pour a plurality of multilayer stacked castings, and the casting production efficiency is improved; and the casting time is shortened, the composition and temperature balance of multilayer cast molten iron can be ensured, and the quality of cast products can be improved.

Description

technical field [0001] The invention relates to the technical field of casting, in particular to a high-efficiency multi-piece multi-layer pouring system and technology. Background technique [0002] At present, the adaptability of sand casting is very wide. There are wooden molds for sand casting molds. In addition to single-piece sand castings, aluminum alloy molds or resin molds with high dimensional accuracy and long service life can be used. Although the price has increased, it is still much cheaper than molds for metal casting, especially in small batch and large-scale production. In addition, sand molds have higher refractoriness than metal molds, so materials with higher melting points such as copper alloys and ferrous metals also use this process. [0003] According to the traditional sand casting process, each sand mold can only be poured once, and the sand mold casts a casting product, and the mold will be damaged after the casting is obtained. The single casting...

AI Technical Summary

Problems solved by technology

[0003] According to the traditional sand casting process, each sand mold can only be poured once, and the sand mold casts a casting product, and the mold will be damaged after the casting is obtained. The single casting casting will occupy a large area when the castings are produced in batches. The production efficiency of casting is low; and a casting requires upper mold, lower mold, and even middle mold, which shows that the casting process is inefficient and wastes resources

[0004] Therefore, people study and improve the sand casting process in order to obtain higher casting production efficiency and casting product quality. They try to set the pouring process by overlapping the casting molds. The existing pouring system is pouring molten iron from top to bottom. , can complete the stacked casting multi-layer casting mold at one time, the castings are overlapped, and the molten iron is poured from top to bottom, causing uneven composition and temperature of the molten iron in the upper and lower castings, uneven shrinkage of the castings, and pores shrinkage due to pressure differences. Quality defects such as slag and cold shut affect the quality of castings. There are also layers of molds that can only expand upward when heated, extruded and deformed to lift the box, which makes the dimensional accuracy of castings seriously inaccurate, affects the yield of castings, and seriously affects the quality of castings. For batch The production of castings can only complete the number of single-piece stacking at one time, and the production efficiency of castings is still low. It is still inevitable to use bottom molds, cover molds, etc., which wastes resources and is cumbersome.

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