Question

\(\ldots\ldots\ldots\ldots\ldots\) method is used for making wide neck bottles.

• A. Blow & Blow
• B. Press & Blow
• C. Pressing
• D. Centrifugal casting

Hint:

Wide neck bottles are commonly made by the press and blow method, while narrow neck bottles are usually made by the blow and blow method.

Answer 1

The Correct Option is B

Glass bottles are hollow glass products. They are generally manufactured by forming molten glass inside moulds. Different bottle-making methods are used depending on bottle shape and mouth size. The blow and blow process is commonly used for narrow neck bottles. In the blow and blow method, compressed air is used first to form the parison and again to form the final bottle. For wide neck bottles and jars, the press and blow method is more suitable. In the press and blow method, a plunger first presses the molten glass gob into the blank mould. This forms a parison with better control over glass distribution. Then air is blown to expand the parison into the final bottle shape. Since wide neck bottles require better control of the mouth and wall thickness, press and blow method is preferred. Therefore, the method used for making wide neck bottles is: \[ \text{Press \& Blow}. \]