Composite sand core sand shooting device and method

Abstract

The invention discloses a composite sand core sand shooting device comprising a lower core box and upper core boxes provided with sand shooting holes. The upper core boxes are at least two independent upper core boxes, wherein the mold cavity of each upper core box respectively corresponds to different positions of the lower core box. Preferably, the number of the upper core boxes is 2, wherein one upper core box has a mold cavity corresponding to the middle part of the mold cavity of the lower core box, and the other upper core box has a mold cavity corresponding to the peripheral part of the mold cavity of the lower core box. The position where the upper core box corresponds to the middle part of the mold cavity of the lower core box is a hollow cavity. One of the purposes of the invention is to provide a composite sand core sand shooting device used in cold core manufacturing, and another purpose of the invention is to provide a composite sand core sand shooting method used in composite sand core sand shooting. Therefore, a sand core, with which sand core strength can be ensured and cost can be effectively saved, can be manufactured.

Description

technical field [0001] The invention relates to a sand core shooting device and method, in particular to a composite sand core sand shooting device and method for cold core manufacturing process. Background technique [0002] When casting some parts with complex cavities, sand cores are needed. A relatively common sand core manufacturing process is to mix the sand material and additives (such as curing agent, adhesive, etc.) evenly, and then blow the mixed sand into the core box with compressed air, and wait for the sand to solidify. Sand cores will be formed. Sand cores made by this process are often called cold cores. [0003] For large parts such as the cylinder head water jacket of the engine cylinder block, due to its complex structure and high precision requirements, there are many special positions that are not conducive to casting, such as thin-walled structures and sharp-edged structures. The sand cores in these positions are in During the casting process, it has...

AI Technical Summary

Problems solved by technology

However, the structure of the engine cylinder head is complicated, and there are many thin-walled positions and sharp corner positions in the middle part and the distribution is irregular. If the special positions that need to use high-strength sand materials are separated from the ordinary positions, and sand cores are made separately, then The sand core in a special position is difficult to fix in the sand box or casting mold, which makes casting more difficult

This makes it necessary to use expensive high-strength sand materials to manufacture integrated sand cores containing both special and common positions during actual production, which is very unfavorable for the control of production costs

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