The detachable bucket film is installed inside the sand injection bucket through the clamping connection of the insertion hole and the insertion block, which can effectively prevent the sand from contacting the inner wall of the sand injection bucket, and is easy to disassemble, convenient for workers to clean or replace, and ensure its cleanliness. At the same time, multiple micro fans improve the airflow inside the sand outlet cover, cool the sand outlet, and ensure stable operation of the equipment. This patent optimizes the sand injection process of the core shooting machine from the details, improving the overall performance of the equipment.