Skip to main content

Types of Blow Moulding



In today’s age plastic is seen everywhere- be it interiors, packaging industry, medical world or even the world of kitchen utensils. Plastic is a non-metallic substance that can easily be moulded into desired shape. It can be melted and then cooled down into the required structure for commercial use. Even the keyboard that you type on or the mobile that you utilise are made up of plastic.

The basic concept of plastic moulding is very simple. Plastic is melted and the molten plastic is poured in the ready moulds of the desired shape and then it is allowed to cool.

Blow Moulding

In this process the raw plastic is poured in a hollow tube shape with one open end called Parison.  The tube, through its open end is then pressed and the metal mould cooled and the pressurised air is forced into the tube. When the plastic cools the metal mould expands and throws out the product.

Types of Blow Moulding

  1. Injection Blow Moulding
Injection blow mould manufacturer in India


The molten plastic is filled into a mould where it is injected through a nozzle into a hollow mould that forms the external shape of the object. The mould opens and the center rod is rotated and it opens and allows the compressed air into the mould, this exercise inflates the finished object which is then ejected and after cooling. This method is majorly utilized for production of large quantities of hollow objects such bottles or jars.

  1. Extrusion Moulding
Extrusion Moulding


In this process the plastic is melted and the molten plastic is poured on a hollow parison. The parison is then closed to capture the melted plastic and air is blown through it so that the molten plastic inflates to the desired shape. After this step the plastic is allowed to cool and later excluded from the Parison. There are two types of extrusion moulding – continuous extrusion moulding and intermittent extrusion moulding. In continuous method the parison is continuously removed and then the individual parts are cut with a knife. In intermittent extrusion moulding parison is not continuously extruded, the new parison is fed only after the existing parison is extruded.

  1. Injection Stretch Blow Moulding
Stretch Blow mould


In Injection Stretch Blow Moulding initially the molten plastic is moulded into solid preform and cooled down. This cooled preform is filled into stretch blow mould machines. The preform is then heated again and filled into the plastic bottles with forced air (compressed). Basically this method consists of both injection moulding process and blow moulding process.

We at Awanti specialise in manufacturing the mould required for stretch blow moulding. Precise machining is done on high quality metal to make the mould suitable for world-class blow moulding machines. The result is – millions of bottles with the same level of accuracy are produced from a single mould

Labels:
Location: Pune, Maharashtra, India

Comments

Post a Comment

Popular posts from this blog

Moulds for Better Shelf Life of PET Bottles

Before we talk about Shelf Life of  PET Bottles  let us first understand what does the term shelf life means. Shelf life is the duration of time period measured from the date of manufacture, that a good is likely to endure within its accepted product specification while stocked under defined conditions. Shelf life is characteristically stated in units of months, i.e. 12 months, 24 months, up to a limit of 60 months. The expression “shelf life” and “expiry date” is frequently interchangeably made use of in the industry, as both the terms reflect the same notion: there is a duration of time period where a good is stable and harmless for use. Shelf life/expiry dates suggests the time where a good will work both securely and efficiently. This is the reason why “shelf life testing” is also known as “stability testing”. The total amount of time a product can remain stable under specific environmental circumstances, equates to its shelf life. Now let us understand what shelf ...
Post a Comment
Read more

Introduction to Injection Moulding

  Awanti Polymoulds , a  Blow Mould Manufacturer in India , started its journey in the industry of  precision machining  and  Mould Manufacturing  more than three decades ago. In the initial years, along with  PET Blow Moulds , Awanti manufactured  Injection Moulds  for various products in the beverage industry and automotive industry. Injection moulding , as the title suggests is implemented using an injection technique. It is a manufacturing process to produce different parts or moulded products by injecting molten material into the moulds and then cooling and solidifying them. Injecting moulding involves six steps like clamping, injection, dwelling, cooling, mould opening, and removal of the product. The clamping unit is used for the opening and closing of the die. It helps in the product’s ejection at the end of the process. The clamping unit is of 2 types: toggle type and straight-hydraulic type. The injection unit is used to melt the pl...
Post a Comment
Read more

High-Precision Shell Holders for Rotary Machines

  Looking for durable and precision-made shell holders for rotary blow moulding machines? Awanti Polymoulds manufactures shell holders compatible with Sidel, Krones, SIG, and Sacmi.   Shell Holders for Rotary Machines – Precision Engineering by Awanti Polymoulds   In the world of rotary blow moulding, every component plays a crucial role in ensuring seamless, high-speed production. Among these components, the shell holder—also referred to as the circulation jacket—holds significant importance. At Awanti Polymoulds, we specialize in designing and manufacturing high-quality shell holders compatible with top global rotary machine brands such as Sidel, Krones, SIG, and Sacmi.   What is a Shell Holder in Rotary Machines?   A shell holder is a precision-engineered component that securely houses the blow moulds in rotary blow moulding machines. It ensures accurate alignment and effective heat transfer during the moulding process. As part of the circulation system, it ...
Post a Comment
Read more