About Us

WHO ARE WE?

Ningbo yingyi machinery manufacturing Co., LTD. Is a foreign trade company engaged in import and export trade.
The company mainly engaged in machinery parts , Hardware products, Aluminum die-casting. zinc die-casting and other metal parts, Stamping parts, Forging parts, Auto parts, Train parts, Valve parts. 

WHY US?

THE GREEN CASTING TECHNOLOGY
THE ADVANTAGES OF LOST FOAM CASTING
THE GREEN CASTING TECHNOLOGY

The lost foam casting technology combines the foamed plastic models similar to the shape and shape of the casting into a model cluster, which is coated with a refractory coating and dried, vibrated in dry quartz sand, and poured with liquid metal under certain conditions to make the model in the high temperature environment, the metal liquid is vaporized and lysed. The cracked gas is discharged through the coating, so that the molten metal occupies the position of the model, and the method of forming the desired casting after solidification and cooling, for the lost foam casting, there are many different names. In China, we call "dry sand solid casting" or "negative compaction casting", and while USA& Europe name "Lost foam casting".

Compared with traditional casting technology, lost foam casting technology has unparalleled advantages, so it has been praised as "the casting technology of the 21st century" and "the green revolution of the foundry industry" by the casting industry at home and abroad.

THE ADVANTAGES OF LOST FOAM CASTING

1. The casting dimension is accurate and consistent.
2. Smooth casting surface finish.
3. No need the sand core parts, which will totally improve the casting quality, while sand casting have the manufacturing defect risk during sand core making and fixing core step.
4. Neither require mould close nor mould taking out, which greatly simplifies the molding process and eliminates casting defects and waste products caused by mold taking and boxing.
5. Dry sand molding with no binder, no moisture and no additives, eradicating various types of casting defects and waste products caused by moisture, additives and binders.
6. The sand treatment system has been greatly simplified, and the molding sand can be completely recycled and repeat used, eliminate the molding sand preparation department and the waste sand treatment department.
7. Falling sand is extremely easy, greatly reducing the workload and labor intensity of falling sand.
8. The lost foam casting has stable weight and less machining allowance, which help reduce raw casting weight and lower the cost compared with the traditional sand casting.

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