Shanghai CHUNXU mould industry company, whose twin company is Shanghai CHUNYANG rotational molding company, located in Shanghai city, P. R. China, is professional in making rotational moulds made of aluminum and molding plastic products of LLDPE or HDPE. Our product range includes: 1, aluminum rotational mould.
Have made around 60 sets of aluminum roto-moulds for various playground toys, and about 300 sets of aluminum moulds for custom molding projects in last 7 years. 85% of them are used in molding products to be exported to USA, Italy, UK, France, Germany, Spain, Luxembourg, Russia, Canada, Thailand, Korea, Taiwan (prc) , Belgium and isreal and ect. 2, custom plastic rotational moulding. Various plastic parts based on custom designs, including air-blower shells, tool cases, petrol tank, flower planter, water tank for scrubbers, truck roof, stock case for motorcycle, golf equipment case, speaker shell, fenders, display case, cool box, playground equipments, Kayaks,and so on.
Please do not hesitate to contact us if you are interested in our capability, or have any inqueries, and sincerely hope to cooperate with you on your projects.

1.Rotational mould can consist of more than 2 tool pieces, which is decided by the structure of the product. For more information, welcome to contact us.
2.Rotational mould can be large, as shown in pictures, their size is up to 4.5 meters.
3.Teflon coating can be applied to rotational mould surface, to make de-mould process easier, but that doesnot mean it is good to coat all tools with teflon. For more information, welcome your inquiry left to us.
4.Tools can either be polished, or textured, including shot peen(beed blast) finish. Texture tool prevents product surface from being easily scratched. For more information, welcome your inquiry to us via email, mobile phone or message.
5.The tool can either be textured, or polished to mirror finish, as shown in pictures. For more information, welcome to contact us via email, mobile phone or leave us a message. Many thanks!

1.Rotationally molded housings can be very strong. What's more, it is good to make large, complex parts, which sometimes need molded-in inserts.
2.Rotationally molded insulated case, can be injected with foamed PU, to keep temperature inside case stable for days.
3.Rotationally molded playground equipments are very popular. They last long, stay strong and safe to children. And rotomolding itself is good for small quantity projects.
4.Rotational molded indoor furniture, is light in weight but strong and it lasts long, can be cleaned easily.
5.Roationally molded automobile parts are strong and they last long time. What's more, rotomolding is good for small quantity and large parts.
6.Roationally molded Kayak or floats are taking place of those made of either fiberglass or rubber. By rotational molding, the kayak and floats can be very strong and light in weight, what's more it is more economical.
7.Rotationally molded gardening articles, last long, invironmentally friendly, and looks like being made of marble.
8.Rotational molded outdoor equipments for public purpose can be invironmentally friendly.
9.Rotational molding is good to deal with large and complex tanks. And rotationally molded tanks can be very strong by increasing its wall thickness.
10.We have made around 30 tools for various tanks used on cleaning machines. Have obtained good knowledge how to resolved leakage problem, and how to achieve an accurate assembly dimension. For more information, please contact us via email, mobile phone or leave us a message, thanks!

The pictures show briefly how we make a rotational mould for your rotomolding projects.
We start from receiving your 3D model or an actual sample. Then we will import them into our mould programe, which is composed in either solidworks or Unigrahpics.
Following above procedures, wooden pattern, casted aluminum, CNC milling, assembly, QC inspection, ect will be achieved continuously and respectively.
So far, the largest mould we make is up to 4.5 meters long.
We are confident of providing you rotational mould of high quality at a very reasonably economical cost.

As shown on previous picture chart, rotational molding starts from grinding raw material into powder.
Grinded powder will be blended properly with pigment, which we will do by ourselves, according to your color sample or Pantone reference number.
Once material is prepared, we will work out a correct shot weight, as per your request or design. Afterwards, the correct amount of blended powder will be weighed and sent to work stations in front of rotomachines, where powder will be poured into mould, before the mould is locked.
Then rotational platform mounted with moulds, will go forward into oven, where the moulds are heated up, as the rotational platform is rotating both vertically and horizontally.
After a certain time, which is set to make sure all powder will gradually melt on mould inner wall, the rotational platform will leave oven, and keep rotating till the mould cool down.
Then mould will be opened, and product will be demoulded. Either keep cooling naturally or put into a cooling jig to make sure dimension and shape are maintained.
Above is just a rough description of rotational moulding process, you are welcome to come to us, and we'd like to show you around our factory where you will be able to understand us more and better.
Welcome you inquiry to our emails, or call to us by mobile phone. Thanks!

Rotational mould can either be made of steel sheet, or cast aluminum.
Normally, if a part's shape is complex, consisting of various curves and recess, or has critical request for dimension and overall shape, or requires special texture finish, its mould had better be made out of cast aluminum.
Compared to mould for injection molding and blowing molding , cost of rotational mould is comparatively low, especially when it comes to large and complex part.
Cast aluminum rotomould surface can be polished or textured including bead blast, shot peen and chemical erosion.
Rotational mould can code with various inserts, or even complex reinforced metal structure inside.
Different rotational moulds can be mounted onto a same platform.
For more detailed and professional information, please feel free to contact us, THANKS!

What rotational moulding offers us is
1.It is cost effective. Compared with either injection molding or blow molding, based on same scale, a rotaitonal mould cost 1/3 or 1/4 of a mould for injection or blow molding.
2.It is very strong and rigid, especially hard at corners and edges.
3.Rotational moulding is friendly in using various inserts.
4.Rotomolding is very good for large and complex products.
5.Rotomolded parts can be seamless.
6.Rotational molding allows to be injected with foamed PU, to increase hardness or create insulation.
7.Rotomoulding makes it possible to change part's wall thickness significantly, without making any modification to its mould.