According to Glass Ball Manufacturers, the raw material for making glass balls can only be glass, which is industrially produced. The raw materials are mainly quartz sand, feldspar, calcite, mirabilite, etc. These ores must be heated to over 1,000 degrees before they can react to form molten glass. The diameter of glass pinball used by children at ordinary times is about 1 cm, and its production method can explain the problem:
Most of the raw materials for glass balls are natural ores. Therefore, in order to manufacture glass balls, all kinds of ores should be crushed and added into powder, and then according to the glass composition, batch materials should be made and sent to a glass melting furnace for melting to form molten glass. Qualified glass liquid flows through the feeding pool and flows out from the feeding port to form a stock. The temperature of the stock is generally 1150~1170℃ for medium alkali glass balls, and there is no alkali.
The temperature of the glass is 1200~1220℃. The stock is cut into globules nearly 200 times per minute. The balls pass through the chute, the ball separator, and are moved by the ball separating plate, and then roll into different funnels, and then fall into the ball forming groove formed by three rollers with the same rotating direction. The balls rotate on the rollers and gradually form smooth and round glass balls under the action of their own surface tension.