Views: 0 Author: Site Editor Publish Time: 2026-09-04 Origin: Site
Bottles, jerry cans, drums and containers remain some of the most recognisable applications of the technology. Yet as industries evolve, the boundaries of blow moulding are expanding.
Today, large engineered hollow products are increasingly being used in automotive systems, marine applications, water management and industrial infrastructure.
Renewable energy may become another important frontier.
India’s rapid development of floating solar photovoltaic infrastructure provides a clear example of this transition.
It shows how a manufacturing technology traditionally associated with plastic products can become part of something much larger:
the infrastructure supporting the global energy transition.
India has become one of the world’s most important solar markets.
By July 2026, cumulative installed solar capacity had reached approximately 164.6 GW, while the country continues to strengthen domestic renewable-energy manufacturing and reduce dependence on imported components.
But expanding solar capacity creates another challenge: land.
Large ground-mounted photovoltaic projects compete with agriculture, industrial development, urbanisation and other infrastructure for available land.
Floating Solar Photovoltaic — FSPV — provides another possibility.
Instead of occupying additional land, photovoltaic modules can be installed on engineered floating platforms across reservoirs and other suitable inland water bodies.
India’s National Institute of Solar Energy has estimated approximately 102.18 GWp of floating solar potential.
The Indian government’s Pradhan Mantri Surya Sarovar Yojana (PM-SSY) further demonstrates this direction, targeting around 5,000 MW of floating solar capacity together with at least 10,000 MWh of energy storage between FY2026-27 and FY2030-31.
These developments are significant not only for the energy industry.
They also create an important question for manufacturing:
Who will build the physical infrastructure required to support this new energy capacity?
When looking at a floating solar power plant from above, the photovoltaic modules naturally attract the most attention.
But underneath those modules lies an extensive engineered floating structure.
A floating solar installation may require main floats, secondary floats, walkways, connection components and other buoyant structures. Large projects can require thousands — or even hundreds of thousands — of individual components.
Many of these products are manufactured from UV-stabilised HDPE.
HDPE combines low density, corrosion resistance, chemical resistance and good processability with the ability to form large hollow structures.
This makes extrusion blow moulding particularly suitable for manufacturing floating solar components.
A single moulded product can integrate buoyancy chambers, structural ribs, mounting surfaces, handles and connecting points.
But the apparent simplicity of a hollow plastic floater can be misleading.
Once the product becomes part of an energy installation expected to operate outdoors for many years, it is no longer simply a plastic component.
It becomes part of the infrastructure.
Consider a typical large solar floater measuring approximately:
1500 × 500 × 254 mm
with a finished weight of around:
10–11 kg.
Machine selection cannot simply be based on the nominal weight of the finished product.
Additional material is required for flash, pinch-off areas and processing allowance. More importantly, the material must be correctly distributed throughout a large and geometrically complex product.
During inflation, different areas of the parison experience different stretching ratios.
Corners, deep sections and structural connection areas may require substantially more material than relatively flat surfaces.
Uniform parison thickness can therefore produce non-uniform final wall thickness.
This is where parison programming — or wall thickness control — becomes critical.
By dynamically controlling die-gap opening during extrusion, material can be strategically distributed throughout the parison.
The engineering objective is not simply to increase product weight.
It is:
to place the right amount of material in the right position.
This distinction becomes increasingly important as blow moulded products move from packaging into structural and infrastructure applications.
Floating solar also changes how production capacity should be evaluated.
A photovoltaic floating system rarely uses only one product.
A single project may require several floaters of different dimensions and weights — perhaps components weighing 4 kg, 6 kg, 11 kg and more than 15 kg — each required in different quantities.
Therefore, traditional production calculations expressed only as pieces per hour do not provide the complete picture.
For an infrastructure project, a more useful calculation is:
Floater configuration per MW
→ Total pieces required per MW
→ Total HDPE consumption per MW
→ Machine and mould productivity
→ Available operating hours
→ MW production capacity per month
This represents an important shift in thinking.
The customer does not ultimately need a machine capable of producing one floater.
The customer needs a manufacturing system capable of supporting the delivery schedule of an entire solar project.
A machine can successfully produce the product and still be the wrong machine for the investment if the required project capacity cannot be achieved.
Product feasibility and project feasibility are not the same thing.
This leads to a broader lesson for the blow moulding industry.
As applications become larger and more technically demanding, machine specifications alone become less meaningful.
Machine plasticising capacity affects cycle time.
Accumulator-head capacity determines the available shot.
Parison programming determines material distribution.
The mould affects cooling efficiency, geometry and pinch-off quality.
The polymer formulation influences UV resistance, environmental stress cracking and long-term durability.
The product design determines buoyancy, loading conditions and structural performance.
And production planning determines whether the investment can ultimately satisfy project demand.
These factors cannot be separated.
The future of advanced blow moulding therefore requires an increasingly integrated approach:
Product + Material + Mould + Machine + Process + Capacity
The machine is one part of the solution — not the entire solution.
At Dawson Group, we believe this transition represents the future direction of our industry.
Our ambition is not limited to building machines that manufacture plastic products.
We want to continuously explore what becomes possible when blow moulding technology is applied to new industries, new materials and new engineering challenges.
From conventional packaging to automotive components.
From water-management products to marine applications.
And now, from industrial hollow products to renewable-energy infrastructure.
The applications may change, but the engineering philosophy remains consistent.
Understand the product.
Understand the material.
Understand the manufacturing process.
And then design the machine, mould and production system around the real objective of the project.
This is why we see Dawson Group’s future not simply as a blow moulding machine supplier, but as a global engineering partner for advanced blow moulding applications.
Our responsibility should extend beyond machine delivery.
It should include helping customers evaluate product feasibility, optimise production concepts, understand capacity requirements and transform new product ideas into reliable industrial manufacturing systems.
Floating solar is only one example.
But it represents a much broader transformation.
As the global economy invests in renewable energy, sustainable transportation, water infrastructure and new industrial systems, manufacturing technologies will also need to evolve.
Blow moulding has an opportunity to participate in this transformation.
Not only by producing more plastic products.
But by producing better-engineered components for more demanding applications.
India’s floating solar expansion demonstrates what this future can look like.
Above the water, photovoltaic modules convert sunlight into electricity.
Below them, engineered floating structures provide the physical foundation.
Behind those structures are polymers, moulds, machinery, process engineering and manufacturing capacity working together.
For Dawson Group, this is the direction we want to continue exploring.
Beyond packaging.
Beyond machinery.
Towards engineered manufacturing solutions.
Because the future of blow moulding should not be defined only by what it has manufactured in the past.
It should be defined by what we can enable it to build next.
