How are Piano Plates Made? Piano Parts

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The cast-iron plate of a piano is one of the most impressive structures of the instrument. It’s a large and complex part of the piano which weighs more than the rest of the piano – and you might wonder how they are made. There are actually two methods of making piano plates and we are going to talk about both of them and whether one technique is better than the other.

The traditional method of making piano plates is something that goes back to the 19th century. This is called a “wet sand cast plate”. In this method the plate takes a long time for the metal to cure; it can take months. This might not be the most time-effective strategy but this is still how most handmade pianos – such as Steinway and Mason & Hamlin plates are made today.

The Asian manufacturers found a much quicker way to produce plates for pianos – and comprises the vast majority of plates manufactured in Asia. By producing a plate with a vacuum mold process, it can be completed in just a few minutes. It’s a lot like how plastics are made – by filling a mold and letting it set.

Vacuum mold plates are structurally sound yet some people discern a different sound from wet sand cast plates. What is the truth? Wet sand cast plates have a higher density of metal and therefore don’t impart a metallic “ring” that you may hear from vacuum mold type plates.

So which one is better?

It’s more of a personal choice than anything else. Some people prefer the sound brighter sound of Asian pianos and some prefer the sound of American or European pianos. It doesn’t mean that one method is necessarily better than the other, but there are some sonic differences between the two.

I would love to hear your opinions about this topic. Have you played pianos with both types of plates? What are your impressions?

Thanks again for joining us here at Living Pianos. If you have any questions or comments about this subject or any subject at all please contact us directly: Info@LivingPianos.com (949) 244-3729.