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The cast iron plate in a piano is a large, heavy metal frame that supports the string tension and provides the foundation for the piano’s soundboard and other components. It is a key structural element of the piano and plays a crucial role in determining the instrument’s sound and overall quality.
The cast-iron frame, also called the plate or harp, is responsible for sustaining the massive tension of the strings. Before advances in metallurgy, the frame was made of wood, which would bend and warp under high string tension.
Jun 10, 2023 · To stop the strings from collapsing the entire piano inwards, the rim and case are reinforced by a huge, heavy cast-iron plate. The plate sits just above the sound board and large metal holes around its edge (known as rosettes or portholes ) allow the sound to come up through it.
Jul 23, 2024 · The cast iron plate, also known as the frame or harp, is the rigid metal structure that supports the tension of the strings. It is designed to withstand the immense pressure exerted by the strings (up to 20 tons in some pianos) and provides overall stability to the instrument.
The cast-iron plate (Figure 31) is installed over the soundboard to suspend the strings, which are stretched at high tension. The modern plate covers the entire piano and greatly increases its structural stability. It is fastened to the rim and to the pinblock, and does not touch the soundboard. The plate commonly rests on dowels,
Mar 10, 2016 · Here is a quick rundown of the basic interior parts of a grand piano. The Cast Iron Plate. When lifting the lid and looking inside, the first piano part you probably will notice is the large cast iron plate. Although colors and casting methods vary from manufacturer to manufacturer, the basic function of the plate stays the same.
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Nov 18, 2023 · The metal part on the inside of a grand piano is called the “frame” or “plate.” This large, cast iron frame is crucial for a piano’s structure and sound. It supports the tension of the piano strings and maintains the piano’s structural integrity.