What is narrow neck press and blow process?

What is narrow neck press and blow process?

narrow neck press & blow is a process which produces a light weight container by pressing the glass in the blank and neck ring to form a parison, normally the finish is 35mm or less in diameter. It is designed to provide the correct amount of glass thickness throughout the finished container.

What is the process of making glass?

Making glass is a fairly straightforward process. In a commercial glass plant, sand is mixed with recycled glass, sodium carbonate, and calcium carbonate. These substances are then heated in a furnace. Once in a liquid state, it is poured into molds to shape, or poured on a flat surface to make sheets of glass.

What is NNPB?

Success Factors of NNPB This is why the NNPB technology (Narrow Neck Press & Blow) is still on a growth path.

What is a gob in glass blowing?

Forming process In both methods, a stream of molten glass at its plastic temperature (1,050–1,200 °C [1,920–2,190 °F]) is cut with a shearing blade to form a solid cylinder of glass, called a gob. The gob is of predetermined weight just sufficient to make a bottle.

What is the advantage of the narrow neck press and blow process over the blow and blow process?

The advantages of the press and blow process are that faster speeds can be achieved and glass distribution is much improved. This process is typically used for wide mouth containers such as food jars. Bottles can also be made using this process, however this would be referred to as NNPB (narrow neck press and blow).

What is the raw materials used to make glass?

Glass is a solid-like and transparent material that is used in numerous applications in our daily lives. Glass is made from natural and abundant raw materials (sand, soda ash and limestone) that are melted at very high temperature to form a new material: glass.

Which country is the largest producer of glass?

China is the biggest flat glass producer in the world. In 2013, the total flat glass production in China reached 780 million containers, according to an industry report.

How do you make clear glass?

  1. Melting and Refining. In order to make clear glass, the right set of raw materials is required.
  2. Float bath. The molten material from the furnace flows into the float bath which consists of a mirror-like surface made from molten tin.
  3. Coating for reflective glass.
  4. Annealing.
  5. Inspecting.
  6. Cutting to order.

What’s the difference between a blow and a press?

The difference between the press and blow process and the blow and blow process is that the parison is formed by pressing the shape. This process is used on containers with finish openings large enough to allow the plunger to enter to form the internal shape of the parison.

How does the blow and blow process work?

The Blow and Blow process is used to create narrow containers. It also requires an IS machine, where gobs of molten glass are gravity fed into the mold. The parison is created by using compressed air to form the neck finish and basic bottle shape.

How is a parison formed in a press and blow process?

The container is then pushed onto the conveyor belt where it travels to the annealing lehr. The difference between the press and blow process and the blow and blow process is that the parison is formed by pressing the shape.

How big is a wide mouth press and blow?

This process is similar to the wide mouth press and blow except the metal plunger in the blank mold is much smaller in diameter. This process is used to manufacture containers with narrow finish diameters (38mm and smaller).