Here is Casting Valve Body Supplier talking about the qualification standard
of precision casting.
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What kind of precision castings are considered qualified? For different precision castings, what should be done in the selection of casting methods? And, what is the overall selection requirement for the casting method? These questions are more concerned and want to know, so let's take concrete answers to eliminate confusion.
Casting Valve Body
1. What kind of precision castings are considered qualified?
For this problem, from a professional point of view, it is: the surface of precision castings is clean and clean, and there are no defects such as sand, scale, flash and casting. Also, on the machined surface, if there is a surface defect, the depth is not more than 2 mm, and on the non-machined surface is 1 mm. In addition, linear defects and cracks are not allowed for all parts of the casting.
2. For different precision castings, what should be done in the selection of casting methods? What is the overall selection requirement for the casting method?
Different precision castings, the selection of the corresponding casting method is different, if specific examples, it is:
(1) Small precision castings, which can be used in horizontal or vertical production lines;
(2) For medium-sized large castings, resin self-hardening sand molding and core making can be used.
(3) Heavy-duty precision castings produced in small quantities in a single piece are still mainly hand-cast.
(4) For precision castings produced in batches, low-pressure casting, centrifugal casting, etc. can be used, and die-casting can also be used.
For the overall selection requirements of the casting method, due to different methods, the precision of the obtained castings is also different. In addition, the initial investment, as well as the production efficiency, are also different, and thus, the suspicion leads to differences in economic benefits. However, in general, in the selection of precision casting casting methods, it is necessary to be able to achieve multiple, fast, good, and economical, and can have good economic benefits and meet various requirements.
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