Core assembly and core assembling technique thereof

Abstract

The invention relates to a core assembly, which comprises a plurality of cavity cores which are orderly connected in series by cascading holes on the cavity cores, an upper outline core and a lower outline core arranged at two ends of the plurality of the serial cavity cores respectively, a cascading piece passing through the upper outline core, the plurality of the cavity cores and the lower outline core in turn, and a left side core and a right side core arranged at two sides of the upper outline core, the plurality of the cavity cores and the lower outline core respectively, wherein a sealed cavity for accommodating pouring liquid is formed among the upper outline core, the right side core, the lower outline core, the left side core and the plurality of the cavity cores. The invention also relates to core assembling technology. The core assembly and the core assembling technology make a casting have higher size accuracy, reduce the casting defect caused by sticking, and increase operability of the core assembling process at the same time.

Description

technical field [0001] The invention relates to a core group; the invention also relates to a core assembly process of the core group. Background technique [0002] For valve body castings with a very complex inner cavity, a lot of sand cores are often required to be combined to form. It is very difficult to assemble these sand cores under the premise of ensuring dimensional stability and high operability. Now There are core-assembling methods in the art such as figure 1 As shown: it includes an integral valve cavity core (12) in the middle, and uses it as a base cavity core, and a plurality of independent valve cavity cores (11) are respectively assembled on the base core by means of glue. This process is difficult to ensure the size of the casting, and has greater difficulty in operation. At the same time, in the process of bonding each valve cavity core (11) with a core adhesive, defects such as pores are prone to occur, making the valve body produced by this process Ca...

AI Technical Summary

Problems solved by technology

This process is difficult to ensure the size of the casting, and has greater difficulty in operation. At the same time, in the process of bonding each valve cavity core (11) with a core adhesive, defects such as pores are prone to occur, making the valve body produced by this process High scrap rate of castings

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