What is Roto moulding ?

Rotational moulding is one of the vastly developing plastic product making processes in the world today. It is a very simple process for manufacturing hollow plastic products mainly water storage tanks.

Rotational moulding consist of following simple process.

Firstly roto moulded grade polymer powder is filled in the mould manually and than mould will be closed.Later on the mould is than shifted to the heating oven. In the oven the mould is heated by forced hot air circulation. Simultaneously it is also rotate about two perpendicular axes alongwith heating in oven. So due to heating the powder now melts and forms a homogenous layer inside the mould.

Further the mould will carry forward to a cooling station where air cools the mould and lastly the mould will open and product part will bring outside.

To obtain the desired quality product, the selection of a quality powdered of roto moulding grade LLDPE is heart of rotational molding process. LLDPE powder is most vastly used raw material for Rotational moulding process.

To make different coloured water tank we require that coloured LLDPE powder and so that to compound masterbatch and color on Virgin granules we also provide extruder machine for that and we also manufacture the uniquely designed Pulverizer machine to fulfill your requirement of quality LLDPE powder so we are one stop solution for your Roto moulding machine and it’s ancillary equipment.

Plastic processing machinery manufacturer Invoit Plast Machinery Pvt. Ltd. located in Ahmedabad, Gujarat, India., is most trusted supplier of roto moulding machine to Indian cities more specifically Hyderabad, Nasik, Chennai, Baroda, Bangalore and Rajkot. Invoit Plast Machinery Pvt. Ltd. is also leading exporter of roto moulding machine to South Africa, Dubai UAE, Nepal, Bangladesh and Qatar. Contact us to get complete reliable support from plastic raw materials, waste, scrap processing machinery manufacturer and exporter.

Major application of Roto moulding machine :

Vertical or Horizontal water storage tanks
Loft water storage tanks
Dust bins
Some Toys
Traffic Cone
Road barrier
Ice boxes
Plant pots

Rotational Molding Machine :

As the name indicate, rotational moulding machines are responsible for making some plastics products. The machine consists of a heated hollow mould which is usually filled with a charged or shotted of the powder material. The machine is then slowly rotated. This causes the soft material inside to disperse and stick to the walls of the machine uniformly.In order to ensure even thickness, the moulding machine is kept rotating at all times while heating and cooling. This ensures that there is no lagging or deformation during the cooling process.

The Roto Moulding machine selection will be based on the below considerations:

Maximum capacity of water storage tank which you’ve to manufacture.
Daily targeted production capacity in terms of ltr.
Type of water storage tank you’ve to manufacture (Loft tank, Vertical tank, Horizontal tank).

Types of Rotational Molding Machines :
There are various types of rotational moulding machines in markets. Each one have their own characteristics and used for different kind of purpose. Main two type of Roto moulding machine are widely uses as per below:

Rock and Roll Machine :

This specialized machine spins or rotates 360 degrees in one direction and can also roll up to 45 degrees while rotationing. With the help of forced hot air heating will provide in this process. We’ve RNR2000 , RNR5000 & RNR10000 models available which produces water storage tanks from 300 ltr to 10000 ltr.

Options :
1) Closed Oven Rock and Roll Machine :

Completely closed oven so gas consumption will be less
Lowest budget require
For new startup in low budget
Door opening and closing by hydraulic system
Hydraulic Power Pack
Easy operational machine hence less skilled require
To make multiple sizes at a time for certain case
Few chances of rejection in end products
Less break down possibility
Customization (PLC automation)

2) Open Fire Rock and Roll Machine :

For new business start-up, most choice driven machine due to its lower investment cost.
Special products like Boats, Toys, flower pots, Ice Boxes, Large capacity water tanks can be manufacture on this easily.
Lowest space require compare to all type of roto moulding machine
Suitable for manufacturing large size hollow products from 300 ltr to 10000 ltr capacity.
Hydraulic power pack
Low operational cost
Low pressure outside adjustable individual burners which gives effective heating & low consumption of fuel.
Require very few services for long time.
Complete visual process hence very few chances of rejection of products
Simple construction so less break down & easy maintenance process.

Available 2000 Ltr Rock and Roll machine , 5000 Ltr Rock and Roll machine & 10000 Ltr Rock and Roll machine.

BI-Axial Machine :

This type of machines allow the moulds to rotate on multiple axes. This is due to having the moulds built onto arms which rotate on two perpendicular axes. While rotating, the moulds are moved into an oven where the heat melts the powders. The arms will continue to rotate as the moulds are removed from the oven for cooling. Bi-axial machine is mainly use for high production capacity with multi capacity product manufacture in a single cycle simultaneously like 500 ltr,1000 ltr, 2000 ltr simultaneously in a single cycle. We’ve BA2000, BA5000 and BA10000 Ltr models to manufacture the water storage tanks from 300 ltr to 10000 ltr capacity.

Options :
1) Single arm Bi-axial Machine :

Single station bi-Axial rotational moulding machine.
One straight-arm
Typical cycle time 65 to 70 min (25-30 min heating, 20 min cooling, 20 min loading & unloading).
Fully automatic burner, diesel or LPG or natural gas.
Fuel consumption cycle around 3.5 kg of LPG depend on model capacity selected.
Connected load starts from minimum 7.5 H.P. depend on model capacity selected
Process temperature upto 200 degree celcius.
Available 2000 Ltr,5000 Ltr and 10000 Ltr single arm Bi-axial machine.

2) Two arm Bi-axial Machine :

Two arm bi-Axial rotational moulding machine.
One offset arm & one straight-arm
Fully automatic burner, diesel or LPG or natural gas.
Fuel consumption cycle around 5 kg of LPG depend on model capacity selected.
Connected load starts from minimum 10H.P. depend on model capacity selected
Process temperature upto 200 degree celcius.
Available 2000 Ltr,5000 Ltr and 10000 Ltr two arm Bi-axial machine.

3) Three arm Bi-axial Machine :

Three arm bi-Axial rotational moulding machine.
One offset arm & two straight-arm
Fully automatic burner, diesel or LPG or natural gas.
Fuel consumption cycle around 12 kg of LPG depend on model capacity selected.
Connected load starts from minimum 30H.P. depend on model capacity selected
Process temperature upto 200 degree celcius.
Minimum production possibility in 24 hrs 100,000 Lit depend on model capacity selected
Approx size of machine is LxWxH = 11 x 8 x 5 mtr
Available 2000 Ltr,5000 Ltr and 10000 Ltr three arm Bi-axial machine.

4) Four arm Bi-axial Machine

Four arm bi-Axial rotational moulding machine.
One offset arm & three straight-arms
Fully automatic burner, diesel or LPG or natural gas.
Fuel consumption cycle around 12 kg of LPG depend on model capacity selected.
Connected load starts from minimum 40H.P. depend on model capacity selected
Process temperature upto 200 degree celcius.
Maximum production possibility in 24 hrs 200,000 Ltr depend on model capacity selected
Approx size of machine is LxWxH = 17 x 13 x 7.5 mtr
Available 2000 Ltr,5000 Ltr and 10000 Ltr Four arm Bi-axial machine.

Available various moulds in for Roto moulding machines :

200,300,500,750,1000,1500,2000,3000,5000,7500,10000 ltr vertical water storage tank moulds in M.S. as well as S.S. body
200,300,500,750,1000,2000,5000,10000 ltr Horizontal water storage tank mouls in M.S. as well as S.S body.
100,200,500,600,750,1000 ltr loft water storage tank moulds in M.S. as well as S.S. body