Views: 0 Author: Site Editor Publish Time: 2022-01-05 Origin: Site
The Blow and Blow procedure or the Press and Blow process can both be used to make glass cups. The type of glass cup being manufactured determines which procedure is used. All glass cups begin as unprocessed materials. The desired qualities of the bottle are mixed into a precise mixture of silica (sand), soda ash, limestone, and cullet (furnace-ready, recycled glass). The combination is then melted in a furnace at high temperatures until it forms a molten material that can be formed. Soda-lime glass, the most common type of glass for food and beverages, will be produced by this mixture. Here are the main points:
1. Methods of Glass Cup Forming
2. Process of Pressing and Blowing
3. Process of Blow and Blow
4. Putting the Pieces Together
Before going into the forming machine, molten glass gobs are chopped with a precisely timed blade to guarantee that each job is of a similar weight. The weight of a gob plays a significant role in the construction of each glass cups. The moulded glass is made by gravity-feeding molten glass into a forming machine, where pressure produces the bottle's neck and basic shape. The form is known as a parison once the neck finish and general glass cup shape have been accomplished. One of two methods is utilized to achieve the final container shape.
In the glass cup industry, the Press and Blow process is the most often used method. It employs an individual section (IS) machine that is divided into various parts in order to create multiple containers of the same size at the same time. A shearing blade is used to cut the molten glass into a precise gob size. Gravity causes the gob to fall into the machine. The gob is pushed down into the mould with a metal plunger, where it begins to take shape and become a parison. The parison is then put into the blow mould and reheated until it is pliable enough to complete the glass proportions. Air is pumped into the parison after it has been reheated to blowing temperature in order to shape the container. Wide-mouth bottles and jars are frequently made using the press and blow method because their size allows the plunger to fit into the parison.
To make narrow containers, the Blow and Blow method is employed. It also necessitates the use of an IS machine, which gravity feeds molten glass into the mould. The parison is made by forming the neck finish and basic bottle shape with compressed air. After that, the parison is flipped 180 degrees and reheated before being blown into its final shape with air. The bottle is blown into the proper shape using compressed air once more. Blow and Blow are the finest procedures for making glass cups with varying neck thicknesses.
After the bottle has been completely made, it is removed from the mould and transferred to the annealing lehr, regardless of the procedure utilized. The bottles are reheated to about 1,050 degrees Fahrenheit in the lehr, then gently cooled to around 390 degrees Fahrenheit. This method allows the glass to cool at a consistent rate, reducing internal stresses that could cause cracking or breaking. The bottles are then thoroughly inspected to ensure that they comply with quality control standards. Any bottles with flaws, such as bubbles, cracks, or malformed portions, are taken off the line and utilized as cullet. All of the remaining bottles are classified by size and type. After that, the bottles are packaged on pallets and ready to transport.
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