0.2–30 Ton Rotational Molding Mold , Custom Roto Mold Manufacturers For Water Tank

0.2–30 Ton Rotational Molding Mold For Water Tank 

Product Overview

In large tank manufacturing from 1 ton to 30 tons, traditional welded structures often cause leakage, uneven wall thickness, and unstable strength.

Rotational molding molds use heating and biaxial rotation to distribute material evenly, forming a seamless structure and improving durability.

The mold supports up to 3150mm diameter and 4150mm height, suitable for industrial and agricultural applications.

Problem

Why is large tank production difficult to control

Uneven wall thickness reduces strength
Welded structure leads to leakage risk
Large size causes inconsistency
Poor heat transfer affects molding quality

Cause

The main causes are

Low thermal conductivity of molds
Steel molds create uneven heating

Improper structural design
Opening and flange mismatch causes stress concentration

Solution

Rotational molding mold provides

High thermal conductivity for uniform thickness
Support for large size up to 30 tons
Custom opening and flange design
Compatibility with gas and electric heating systems

Result is seamless structure and stable mass production

Specifications

Application

Used in chemical storage tanks and industrial containers
Used in irrigation and agricultural water systems
Used in municipal and infrastructure storage systems

How It Works

Plastic material is loaded into the mold, heated and rotated, forming an even layer on the inner surface and creating a seamless structure after cooling

Key advantages are uniform thickness, no welding, and stable strength

How To Choose

Key selection factors include

Capacity requirement with standard molds below 5 tons and custom molds above 10 tons
Material selection with aluminum recommended
Size capability for large diameter production
Design flexibility for openings and connections

FAQ

Q1 What is the maximum capacity
A Up to 30 tons

Q2 Is aluminum necessary
A Recommended for better heat transfer

Q3 Can it be customized
A Yes, fully customizable

Q4 What materials are used
A PE and LLDPE

Conclusion

For large capacity tanks, seamless structure, and stable production, rotational molding aluminum molds are the optimal solution