Capability decision data

Technical fit for Rotational molding

Use this capability summary to decide whether the process fits the part before discussing tooling, lead time or price.

Best fit: Large, hollow and seamless parts such as tanks, enclosures and durable low-stress shells.
Design focus: Generous radii, material flow into corners, inserts, vents and nominal wall distribution need early attention.
Material direction: Powder-grade polyethylene is common; UV, chemical, stiffness and impact needs guide the grade and additives.
Volume and cost logic: Lower-pressure tooling can reduce mold cost, while long heating and cooling cycles affect unit economics.
Inspection focus: Check wall distribution, internal porosity, cure, warpage, inserts, threads and leak performance.
Compare against: Compare with blow molding for higher-volume containers and thermoforming when an open shell or joined assembly is acceptable.

Product Description

When manufacturing large, durable, and seamless hollow parts, rotational molding (rotomolding) stands out as one of the most reliable and cost-effective solutions. Our advanced rotational molding services utilize proven plastic rotational molding processes to produce high-quality products with excellent structural integrity and uniform wall thickness.

Powered by modern rotational molding machines, we deliver scalable plastic processing solutions for industrial, commercial, and outdoor applications.

How Rotational Molding Works

Our process follows a specialized plastic forming process:

Plastic powder loaded into mold → Mold rotates on multiple axes → Heated evenly → Material coats the mold interior → Cooling → Finished product

During this plastic rotational molding process, the mold rotates continuously while being heated, allowing the material to distribute evenly across the داخلی surface. This results in:

Consistent wall thickness
Seamless, one-piece construction
No internal stress

Unlike other plastic molding processes, rotational molding does not rely on high pressure, making it ideal for large hollow products.

What We Manufacture

Water Tanks

We produce high-capacity plastic water tanks using durable materials and optimized plastic manufacturing processes. These tanks offer:

Leak-proof, seamless construction
UV resistance for outdoor use
Long service life

Ideal for residential, agricultural, and industrial water storage.

Plastic Storage Tanks

Our plastic storage containers are designed for safe and reliable storage of liquids and chemicals. Using advanced plastic molding processes, we ensure:

Strong impact resistance
Chemical compatibility
Uniform wall thickness for added strength

Suitable for industrial storage applications.

Outdoor Trash Bins

We manufacture robust outdoor waste bins built to withstand harsh environments. Our plastic processing solutions provide:

Weather resistance
High durability
Easy maintenance

Perfect for municipalities, commercial spaces, and public areas.

Children’s Playground Equipment

Safety and durability are critical for children’s plastic play equipment. Through controlled plastic forming processes, we create:

Smooth, safe surfaces
Impact-resistant structures
Bright, customizable designs

Widely used in parks, schools, and recreational facilities.

Key Advantages of Rotational Molding

No Internal Stress
The low-pressure plastic molding process eliminates internal तनाव, improving product durability.
Uniform Wall Thickness
Even material distribution ensures consistent strength throughout the product.
Ideal for Large Hollow Parts
Perfect for tanks, containers, and oversized components.
Design Flexibility
Complex shapes and integrated features can be achieved without additional assembly.

Our Equipment & Capabilities

We operate advanced rotational molding machines designed for precision and efficiency:

Multi-axis rotation systems for uniform forming
Accurate temperature control for consistent material توزيع
Capability to handle large molds and high-volume production

Our integrated plastic processing equipment ensures full control across the entire plastic production process, from raw material to finished product.

Who We Serve

We support a wide range of industries:

Industrial & Agricultural Clients
Large storage tanks and functional containers.
Municipal & Commercial Projects
Durable outdoor waste management solutions.
Recreational Equipment Manufacturers
Safe and reliable playground products.

Why Choose Us?

Expertise in Rotational Molding Technology
Deep understanding of plastic rotational molding processes and materials.
Custom OEM Solutions
Tailored designs and molds based on your requirements.
Consistent Quality Assurance
Strict control throughout the plastic manufacturing process.
Global Service Capability
Reliable communication and delivery for international clients.

Let’s Build Your Next Large-Scale Product

If you’re looking for a trusted partner in rotational molding for large hollow plastic products, we’re ready to support your project from concept to production.

Contact us today to explore how our rotational molding solutions can bring your ideas to life with strength, consistency, and efficiency.

FAQ: Rotational Molding Services for Large Hollow Plastic Products

What is rotational molding and why is it used for large hollow parts?

Rotational molding places plastic powder into a mold, which is heated and rotated biaxially in an oven. The resin melts and coats the inside surface of the mold. Because the process uses no injection pressure, tooling cost is low and molds can be made from aluminum, which is economical for large, complex hollow shapes like tanks and playground equipment.

What is the typical wall thickness range for rotomolded parts?

Wall thickness ranges from about 3 mm to over 25 mm. Wall uniformity depends on rotation speed, oven temperature profile, and part geometry. Areas of the mold that heat unevenly require process tuning to achieve consistent wall distribution.

How does rotomolding tooling cost compare to blow molding or injection molding for large parts?

Rotomolding tooling for a 500-liter tank can cost 80–95% less than injection mold tooling for the same shape, primarily because molds are unpressurized and made from aluminum or fabricated steel. This makes rotomolding attractive for large hollow parts even at moderate production volumes.

Which materials are available for rotomolding?

Linear low-density polyethylene (LLDPE) is by far the most common material due to its toughness, UV stabilization options, and wide rotomolding processing window. PP, nylon, PC, and PVC plastisol are also processed. Material must be in powder form.

Can rotomolded parts include inserts, threads, or mounting features?

Yes. Threaded inserts, flanges, and alignment features can be molded in by including them as part of the mold cavity or as removable cores. Post-mold drilling, routing, and welding are also used to add fittings, hatches, and connection points.

Technical Parameters

Model	RM-1	RM-2	RM-3	RM-4
--------------------------	--------------------	--------------------	--------------------	--------------------
Heating Method	Gas / Electric	Gas / Electric	Gas / Electric	Gas / Electric
Max Heating Temperature	300 °C	300 °C	300 °C	300 °C
Mold Size (Max)	800×600×600 mm	1000×800×800 mm	1200×1000×1000 mm	1500×1200×1200 mm
Mold Weight Capacity	50 kg	80 kg	120 kg	200 kg
Rotation Axis	Dual-axis / Tri-axis	Dual-axis / Tri-axis	Dual-axis / Tri-axis	Dual-axis / Tri-axis
Rotation Speed	0-10 RPM	0-10 RPM	0-12 RPM	0-12 RPM
Cooling Method	Air / Water	Air / Water	Air / Water	Air / Water
Machine Power	15 kW	20 kW	30 kW	40 kW
Machine Dimensions (L×W×H)	3×2×2.2 m	4×2.5×2.5 m	5×3×2.8 m	6×3.5×3 m
Total Weight	3.5 T	5 T	8 T	12 T
Production Capacity	5-15 pcs/h	10-25 pcs/h	20-40 pcs/h	30-60 pcs/h

Rotational Molding Services for Large Hollow Plastic Products

Technical fit for Rotational molding

Product Description

How Rotational Molding Works