Skip to main content

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 plastic by heat. This molten plastic is then injected into a mould. The machine controls the injection speed and dwell pressure after cavities are filled with molten plastic. Screw-type plunger is used to force molten plastic into the mould cavity. Dwelling pressure is the pressure applied to ensure that all the Mould cavities are filled, leaving no empty bubbles or spaces. The core side requires more cooling as large material is in contact with the core. This process removes heat from the mould making it safe to remove the moulded part. This helps keep the mould dimensionally stable. Molding condition means cylinder temperature, injection speed, mold temperature etc. set in a molding machine to obtain required moldings, and the number of combinations of conditions is innumerable. Depending on the conditions selected, the appearances, dimensions, and mechanical properties of the molded products change considerably. An injection mould is generally multi-cavity, meaning multiple moulded parts are produced in a single shot.

Injection Moulding and PET

Polyethylene terephthalate plastic resin (PET) has an enhanced melting point near 270 degrees Celsius. The effect of the pressure on the gluiness is larger than that of the temperature. Temperature supervision of the mould and temperature managing of the plastic are obligatory items with PET. PET is highly sensitive to water and hence preliminary drying of moulding pellets is compulsory. A crystalline reinforcing agent is used to improve the crystallinity of the material. PET is used to make transparent products that have glossiness and heat distortion temperature.

In the beverage industry, the largest application of injection moulding is manufacturing of preforms. A preform is an intermediate product that is subsequently blown into a polyethylene terephthalate (PET) container or bottle. Preforms vary in neck finish, weight, colour, and shape, and are specifically designed to meet the needs of customers in different market segments. Preform weight depends on the end container’s desired volume. Preforms can be single-layer or multilayer. Barrier preforms provide additional benefits and increased beverage shelf life, thanks to a special layer embedded in several layers of polyethylene terephthalate. The colour and neck finish depends on the product application. These preforms are then fitted on blow moulds to manufacture PET bottles.

Labels:
Location: Sinhgad Rd, Pune, Maharashtra, India

Comments

Post a Comment

Popular posts from this blog

Crafting Quality: Awanti Polymoulds’ Precision moulds for PET

Plastic bottles and containers serve a diverse range of purposes across industries such as beverages, food processing, pharmaceuticals, liquor, and home care products. They are utilized for packaging water, soda, juice, oil, jams, medicines, liquor, as well as personal and home care items, with sizes varying from small volumes to several litres. At Awanti, we specialize in manufacturing blow moulds for PET bottles, employing advanced designing, high precision manufacturing and accelerated testing. Established in 1990, Awanti Polymoulds has been at the forefront of designing, manufacturing, and testing PET blow moulds to meet international standards. Precision and accuracy are paramount in our manufacturing process to ensure consistent, high-quality bottles that meet our customers’ expectations. Our commitment to customer satisfaction extends both domestically and internationally, driving our continuous efforts to excel. Our moulds are engineered for durability, precision, and longevity
Post a Comment
Read more

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 life of 
Post a Comment
Read more

AWANTI POLYMOULDS : THE SECRET OF MOULDING ACCURACY, SINCE 30 YEARS

  What began as an inspiration in engineering, yet a fire in the belly in 1990 in Pune, India has now crossed the seven seas and emerged as a leader in PET bottles blow moulds- that’s Awanti Polymoulds- the reliable   blow mould manufacturer in India. Growing from strength to strength, Awanti worked with giants like  Coca-Cola and Sidel . The further result- completion of assignments of  PET Bottle blow moulds  of leading brands in beverages, packaged drinking water, natural mineral water, sparkling water, carbonated fruit-drinks, hot-fill and cold-fill juices, edible oil, liquor, pharma and home-care products and more- the list is growing every week- pouring orders from various corners of the globe. These brands are spread over 200 locations in 15 countries, include names like  Coca-Cola, Pepsico, Unilever, BIG Cola, Parle Agro, Bisleri, SMF Germany, Electropneumatics & Hydraulics and Sidel India . To date, Awanti has clients from India, Nepal, Bhutan, Bangladesh, Maldives, Ghana,
Post a Comment
Read more