Injection Moulding

Blow Moulding

Blow Moulded Tank

Film Application

Pale Container Application

Extrusion Application

Woven Sack Application

Blow Moulding Applications

Blow Moulding process is simple & effective way of producing complex, intricate hollow shapes that are light weight and have excellent stiffness to weight ratios. Blow molding is a cost-effective alternative to injection molding, with both production and machinery being cheaper typically. Blow molding works well for products that are one single piece in mass volumes.
The costs in blow molding are lower as compared to injection molding because machinery costs are typically lower as well. In blow moulding process, one-piece construction is done so that there’s no need to connect part halves, which can achieve shapes that injection molding cannot produce

NEED FOR BLOW MOULDING

Blow Moulding process is simple & effective way of producing complex, intricate hollow shapes that are light weight and have excellent stiffness to weight ratios. Various types of Bottles, Jerry cans, Containers, Drums, Carboys & Water tanks are also made through this process.

Blow molding is a cost-effective alternative to injection molding, with both production and machinery being cheaper typically. Blow molding works well for products that are one single piece in mass volumes.

The costs in blow molding are lower as compared to injection molding because machinery costs are typically lower as well.

In blow moulding process, one-piece construction is done so that there’s no need to connect part halves, which can achieve shapes that injection molding cannot produce.

TYPES OF BLOW MOULDING

A) Extrusion blow molding(one stage)

It’s the most commonly used & simple type of process used widely, it can be continuous or intermittent. In continuous extrusion blow molding, a parison will be constantly fed into the mold and each form will be cut off with a blade as it forms. Intermittent extrusion blow molding expels each new plastic from the metal mold when it is cooled and the parison is fed into the mold only after the preceding parison is expelled.

Extrusion blow molds are generally much less expensive than injection blow molds and can be produced in a much shorter period of time. Extrusion blow molding is appropriate for smaller runs. Advantages include cost savings on tooling and shorter production time while disadvantages usually include lesser control of wall thickness and greater amount of scrap material.

B) Injection blow molding (one stage)

In injection blow molding, a blow or core rod is used throughout the process. First a parison is injected into a split mold cavity around the rod. The parison that is formed looks similar to a test tube. The core rod transfers the parison to the blow mold machine where forced air creates the final shape. The rod then transfers and extrudes the finished product from the machine.

This process is generally suitable for smaller containers with large volumes. Here, tighter tolerances can be expected than when extrusion blow moulding is used. Other advantages are the assurance of uniform wall thicknesses, production free from waste & seamless products in the neck and base areas. This enables blow products to resist pressure strains and endows them with high surface finish.

C) Injection stretch blow molding (two stages)

Injection stretch blow molding combines the injection molding and blow molding processes. The plastic material is first molded into a solid preform, to create a threaded bottle neck. Once the preform cools it is fed into a stretch blow mold machine. The preform is then reheated using an infrared heater and blown into a plastic bottle with forced compressed air.

This process is best known for producing PET bottles commonly used for water, juice & beverages. Biaxial stretching of plastic material increases the tensile strength, barrier properties, drop impact, clarity & load bearing for containers produced. This also helps in reducing weight of bottles.

Advantages of Using Bajaj Masterbatch for Blow Moulding

Instead of having pre coloured compounds, usage of our masterbatches facilitates low stock holding as and when required.

Compared to compounds, our masterbatches gives a choice of wide range of colors and other properties besides saving huge cost as the inventory level & space required is very minimal .

Provides “dust free” environment without any health or safety risks in comparision to conventional usage of pigments powders & additives individually.

Optimum dispersion of pigments and additives in our masterbatches facilitates ease of processing. Also, it reduces the cost of purging & flushing .

Elimination of ‘trial and error’ development or formulation work, as this is done already by us ensuring color strength and consistency forever.

Our masterbatches are filler free and they are fairly highly concentrated (in comparison with the target composition), with “let-down ratios” affordable and economical as per the client’s application requirements.

Provides aesthetic appeal with gloss and brightness on the finished product without any surface defects.

As blow moulded bottles, containers, carboys and drums are extensively used in Pharma and Chemical applications, our masterbatches has the ability to maintain the chemical stability of the pigments and other ingredients incorporated in it. This facilitates migration resistant , leaching free and non reactive & ease of using at any conditions.

We use eco friendly pigments which are not harmful to the environment, on request we can provide ROHS (Restriction of Hazardous Substance) compliance.

Ease of consolidation with polymer at any addition levels and has uniform dispersion.

They are suitable for food contact applications as the ingredients used in it are non-toxic , non hazardous and the articles incorporated with our masterbatches are safe for use.

ONE STOP SOLUTION FOR BLOW MOULDING PROBLEMS / DEFECTS

Product Solutions for Blow Moulding

Blow Moulding Applications for
Color Masterbatch

PLAST COLOUR produced with high pigment loading to provide light fastness, migration resistance, dispersion, thermal stability , food contact compliance & colour consistency for every supplied lot. We can offer wide range of Colours from our existing product range or customize based on pantone shades given by clients

Blow Moulding Applications for
White Masterbatches

PLAST SUPER 131,181 (70% TiO2 content), PLAST SUPER 157, 132 (50% TiO2 content). These products are having superior dispersion, opacity, gloss, ease of processing and food packaging compliant. Also, they do impart heat resistance & UV protection to the end product to certain extent.