Skip to main content

A Walk Through Plastic Blow Moulding Techniques



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

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

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

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

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

Manufacturing of rotary-blowing moulds for a global soft-drink company across India

  Project duration: 8 months Project scope: – Technical and aesthetic design of a carbonated drink bottle, based on inputs from the customer – Testing of pilot mould and bottle samples as per international standards – Manufacturing of moulds for different rotary blowing machines (> 50 moulds) Project synopsis: The objective of this project was to design a common bottle for different flavours of carbonated drinks and manufacture moulds for six franchise-bottling operations of a global beverage brand in India. This was what we call a “full scale project”, which starts with designing the bottle, followed by pilot mould trials and ends with the manufacturing of commercial moulds for each franchise. Bottle designing Based on the customer inputs like product application, pack-size and perform weights, we initiated the process of designing the bottle With our in-house team of design engineers using state-of-the-art 3D modelling soft-wares, we gave the customer multiple design options, ...
Post a Comment
Read more

Import Quality Preform Moulds from India

PET, an acronym for polyethylene terephthalate, is a synthetic resin of thermoplastic polymer, while a preform is an intermediate product that is ultimately blown up into containers or bottles. Preforms are manufactured from polyethylene terephthalate (PET), and so they are called "PET Preforms." Over centuries, PET preform moulds have been manufactured in a particular manner. However, with modern plastic moulding materials, there has been a great advancement in the way they are manufactured now. The most recent mass production PET preform moulding machinery has been developed, and the latest PET preform moulds in steel and alloys have been introduced to withstand severe processes. Accuracy is the key requirement in present manufacturing, and PET preform plastics are manufactured by steadily mounting a high standard of precision, which requires modern machine tool applications and methods. While there are several PET blow mould manufacturers and suppliers all over the globe...
Post a Comment
Read more