求翻译：本机使用生产材料为覆膜砂，通过高压气流瞬时将砂射入型腔，模具加热（电或煤气）至180-240摄氏度固化成型，可制作砂型、壳芯，一个成品的成型周期为90-180秒（因砂型大小而定）。产品表面光滑，强度高，成型后即可使用，大大缩短制芯时间及工艺流程，生产效率高。（注：使用壳芯机制作壳芯，其模架可翻转180度，将型腔内多余未固化的砂倒出，大大降低砂芯重量及生产成本。）是什么意思？

The machine used in the production materials are coated sand, sand into the cavity through the instantaneous high pressure airflow, heating of the die (electric or gas) to 180-240 Celsius curing, can be made of sand, shell core, finished the cycle time is 90-180 seconds (due to sand size.) Smooth surface, high strength, forming can be used after, greatly reducing process time and process flow, high production efficiency. (Note: using the mechanism of core-shell as shell-core, the die set can be flipped 180 degrees, the excess is not cured within the cavity of sand poured out, significantly reducing sand core weight and production costs. ）