Rotomolded Yacht Central Console
made of LLDPE
The advantages in roto-moulding process:
1. One-piece construction: virtually stress-free enclosed parts or with openings
2. Design flexibility from various size and shapes.
3. Economical for short production runs, prototype research and volume production
4. Variety of finishes and color
5. Metal inserts as integral parts
6. Weight reduction as compared to most metals.
7. Excellent load-bearing properties
8. Ability to produce multi-wall moldings, hollow or foam filled
9. Minor undercuts are possible with no draft angles required
10. Thickness can be varied if required
11. Cost saving - economic tooling costs
12. Uniform wall thickness no thinning in the extremities
13. Resistance to stress-cracking and corrosion
We offer 3D design, opening mould, and rotational products manufacturing.
1. Design & Engineering Services
a. We can help you modify your original 3D drawing to make it suitable for rotational molding.
b. For new project,our in-house Design & Engineering Department will help advise and manage your
project all the way to a produced rototmolded part.
c. Sample canning and designing.
2. Rotational Molding Design Guides
a. Minimum wall separation 5x wall thickness (a)
b. Minimum wall separation 3x wall thickness (b)
c.Uniform wall thickness ± 20% (c)
d.±10% is considered precise tolerance (c)
e. Wall thickness .090" to 1.00" (c)
f.Different wall thickness can be produced based on functional requirements
g. Large flat areas need a crown or ribs (d)
h. Corners need minimum radius of 3/16"(e)
i.Structural strength
· Reinforcing ribs - average proportions
· Height 4x wall thickness (f)
· Width 5x wall thickness (g)
·Kiss-off ribbing (h)
· Part Finishing and Secondary Operations
Note: Design Guide information is based on Linear Low Density Polyethylene (LLDPE) other
materials tolerance can vary.
3. Cast Tooling Pattern
When your design is finalized the pattern production begins. Most commonly patterns are CNC
machined from the 3D model, but other options are available.
After the pattern is reviewed and signed-off on, the followers for determining the parting lines are
constructed. Next, the pattern goes through the sand ramming process creating the cope and drag.
Then our Tooling Department is ready to pour the tool.
4.Rotational Molding Plastic Parts
we can also provide production for plastic parts by rotational molding.
What is Rotational Molding?
Rotational moud or Roto Molding which is a high temperature, low volume, low pressure thermoplastic
forming process .It mainly suite for producing hollow, one piece parts such as large oil or chemical
tanks, kayaks, point of purchase displays, frames, cases, furniture,
carts, dispensers, park equipment. The material can be UV resistant which can ensure the outdoor
use of your products .
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