Several functions in a one-piece mix tank
A rotomoulded mix tank is commonly used in agriculture for adding chemicals to a sprayer, as well as cleaning jerrycans that hold the chemicals. This part of equipment on a sprayer needs to fulfil multiple functions. It has a funnel where the chemicals are collected, and at the outlet a hose is connected so the chemicals are pumped to the main tank. Also, nozzles are assembled to clean and rinse the jerrycan, so no residue remains in the packaging and all the chemicals are used with zero spillages.
All these functions can be integrated in a double-walled rotational moulded mix tank, where the internal core forms the funnel, the outer wall offers a place for the control panel, and the internal hollow space can be used to place the hoses.
Multiple options to apply graphics
Rotational moulding offers multiple options to apply graphics on the product.
The graphics are needed for adding operating instructions, volume indication, company logo and trade names.
The most used option is to apply an engraving in the tool, so the text will be embossed on the moulded mix tank. When the mould has a texture, and the engraving is smooth, the visibility is enhanced. Besides traditional decals mould-in or mould-on coloured graphics are also possible. These options are extremely durable because the colors are fused in the polymer surface.
A smooth surface for optimal cleanability
It is important that the core of a double-walled mix tank, which has the funnel function, is easy to clean. It is crucial that no plant protection products are left behind. When switched to another chemical there should be no residue left behind. With the rotational moulding process, the surface appearance of the product is determined by the mould surface. When the mould surface is textured, you will get the same texture on the moulded product.
For a smooth surface of the plastic product, the mould surface is polished. The polishing can be done in various grades of smoothness. Another aspect of cleanability is to minimize the presence of surface pinholes. This is mainly determined by the type of polythene, mould quality and process settings. Rotovia has extensive expertise in this area with the many projects we have carried out over the last 50 years.
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