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Plastic moulding

Plastic moulding

Plastic moulding is a perfect production process for making plastic items of various shapes and sizes and offers solutions adapted to the most diverse client requests.

The production of plastic household cleaning items happens thanks to plastic moulding, following a precise itinerary of work, innovative methods and technology, and always starts with the use of the right mould.

Mould design

The first step to obtaining a good product is to follow all the production phases with care and attention, starting from the design of the component mould.

As a company we have our own line of components: for example, blocks for brooms and brushes, but also dust pans and accessories.

We distribute them to our clients who then turn them into finished products.

We also create entire lines and individual customised products for our clients, developing together with them the initial idea required to make the mould and then starting production in small or large quantities.


Before putting a new line or product into production, it is necessary to test the item’s success by making a prototype based on a suitable mould.


Starting from the prototype and the mould made ad hoc for each item, production gets underway using high-level materials, such as completely recyclable polymers PP – PE.

The plastic materials are treated with special presses and moulding techniques that ensure their lightness and resistance.

It is possible to choose from an infinite range of colours, or opt for traditional shades from the catalogue or look for new shades and create highly personalized items.

Moulding techniques

In our company S. Dini we mainly use the injection moulding technique. This involves a process in which the material is melted and injected at high pressure into a closed mould; here it solidifies and gives rise to the product.

The work takes place at a high degree of automation made possible thanks to 15 injection presses from 75 to 350 tons that manufacture on a continuous 24-hour cycle.

To create increasingly high-performance items, that are light but also solid and robust, we also use other methods:


Overmoulding by injection is a highly sought-after technique. The molten plastic is injected into a steel mould inside which are elements that are already moulded (in plastic or metal).

The injection takes place at very high temperatures and thanks to this the result is a kind of fusion of two materials.


This is a very popular type of moulding because it allows the fusion of plastic materials of different types taking into account their different material properties such as structure, melting temperature, and adhesion (chemical or mechanical).

The use of this technique allows you to simplify the production process and thereby lower costs.

In Mould Labeling (IML)

The advantage of In Mould Labeling is the ability to personalise and decorate the items straight a way during the moulding phase.

In this case, the decorative label becomes a part of the article and is, therefore, more resistant over time.

Gas Injection System (GIT)

Used with thicker articles, this technique provides for a lighter product while maintaining its mechanical properties.

This is done by injecting nitrogen into the still melted plastic which creates a real air bubble inside the piece.