In addition to blowing, what are the other methods for forming glass bottles?-Jianhua Glass

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In addition to blowing, what are the other methods for forming glass bottles?

Feb 12,2025

In addition to blowing, the methods for forming glass bottles include pressing, press-blowing, centrifugal casting, and drawing.

In addition to blowing, what are the other methods for forming glass bottles?

The methods for forming glass bottles include the following besides blowing:

Pressing method

Principle1: The molten glass is placed into a mold, and pressure is applied through a punch or plunger to shape the glass within the mold. This method is suitable for producing glass bottles with regular shapes and high dimensional accuracy, such as some square or angular bottles.
Process1: First, the raw materials are heated and melted to generate liquid glass. After homogenization and purification, the molten glass is extruded and cut into droplets of a certain quality. The glass droplets are then sent to a low-temperature mold, where they fill the entire cavity under the action of compressed air or plunger pressure. After cooling and sufficient solidification, they are demolded and extracted.

Press-blowing method

Principle2: This is a method that combines pressing and blowing. First, the initial shape of the glass product is formed using the pressing method, and then compressed air is used to blow it into the final product. This method combines the advantages of both pressing and blowing, allowing for the production of high-quality, more complex-shaped glass bottles.
Process2: The glass paste flows into the mold, and the top rod and bottom mold press the liquid into the initial shape. At this point, the bottle mouth is formed, and the bottle body needs to be blown again to take shape. When the scissors cut off the glass droplet, the rotatable initial mold rotates from the loading position into the pressing station, the mouth mold closes and descends into the initial mold to form the initial blank, and the turret mechanism brings the pressed blank to the blowing station under the blowing head for shaping.

Centrifugal casting method

Principle: The molten glass is poured into a rotating mold, utilizing centrifugal force to evenly distribute the glass on the inner wall of the mold, and then cooled to form. This method is suitable for manufacturing large glass bottles with special shapes, such as large-caliber glass containers.
Process: First, prepare the rotating mold, pour the glass liquid that has reached the appropriate temperature into the mold, and the mold rotates at a certain speed. The glass liquid spreads and adheres evenly to the mold wall under the action of centrifugal force. As the mold rotates and cools, the glass liquid gradually solidifies into shape. Finally, the mold stops rotating, and the formed glass bottle is taken out.

Drawing method

Principle: Generally used for producing glass tubes and other products, it can also be used to make some special-shaped glass bottles by drawing the glass liquid from the furnace and using mechanical devices to stretch the glass liquid, forming the desired shape and size during the stretching process.
Process: The glass liquid is drawn from the outlet of the furnace. Under the combined action of gravity and drawing force, the drawn glass liquid gradually elongates and thins, forming glass tubes or specific-shaped glass blanks. The glass blanks are then further processed and treated as needed, such as cutting and bending, to make glass bottles.

Different glass bottle forming methods each have their own advantages and disadvantages.

How to ensure the quality and safety of glass bottles for alcoholic beverages?

Glass bottle specification standardization

What are the common specifications for glass bottles?

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Tel: +86-0775-6658866

E-mail: TomasYan@wzglass.com

E-mail: 389651625@qq.com

website: www.wzglass.com