Custom injection moulding

Replast specialises in the manufacture of products using high-pressure plastic injection moulding, ensuring high precision, consistent geometry, control over material properties, compliance with industrial production requirements, consistent quality and cost-effective production at scale.

What is plastic injection moulding?

Injection moulding is a manufacturing process that involves filling the cavity of a metal mould with liquid plastic resin, which then cools to form a plastic part.  It is most commonly used for the large-scale production of plastic parts due to low material waste and the low cost per part.

This is the ideal manufacturing process for industries such as medical equipment, consumer goods and the automotive sector.

The advantages of injection moulding

1. The ability to manufacture parts with complex geometries 

This technology enables the production of items with highly complex shapes, internal cavities, thin walls and intricate structural features.

2. High surface detail 

This method ensures the accurate reproduction of fine details and surface textures, which is important for both functional and decorative elements.

3. High product consistency 

Thanks to the use of moulds, each subsequent product features high-precision geometric repeatability, consistent dimensions and characteristics.

4. Efficiency in mass production 

The technology is particularly effective for large production runs, making it ideal for industrial manufacturing.

5. High productivity of the production process 

The die-casting process enables large volumes of products to be manufactured quickly in a short space of time.

6. Optimal use of materials 

The technology minimises raw material waste and enables the efficient use of polymer materials.

7. High and consistent product quality 

Thanks to the automated and controlled process, a consistent level of quality is ensured for every product.

Injection moulding

A key feature of the technology used in the manufacture of plastic products is the need to prepare the raw material so that it can be brought into a viscous state, after which it is moulded into the required shape.

The main stages of production

Melting of the polymer

The polymer raw material (plastic pellets) is fed into the barrel of the injection moulding machine, where, under the influence of heat and the rotation of the screw, it transforms into a molten, viscous state.

Pressure injection

Molten plastic is injected under high pressure into a closed mould, completely filling its cavities and forming the shape of the product.

Re-pressing

Once the mould has been filled, additional pressure is applied to compensate for material shrinkage and ensure dimensional accuracy and the absence of defects.

Removing the item

The mould opens, and the finished plastic product is ejected from the mould either automatically or manually.

Cooling

The material in the mould gradually cools, hardens and acquires the required mechanical properties.

In the process of manufacturing plastic parts, various polymer components are combined and, in molten form, are injected under pressure into prepared moulds:

Removable, fixed structures, semi-removable;
Manual, with automation;
With a horizontal/vertical split plane;
With one or more detachable panels.

Machines used for injection moulding are equipped with advanced software control systems and are characterised by their reliability, functionality and safety, provided that all recommendations and regulatory requirements are followed. Custom-made plastic products can be produced in series or in small batches. The range of plastic products is virtually limitless – using specialised equipment, it is possible to manufacture plastic components for domestic or industrial use, as well as plastic profiles for the production of window systems and doors. Please call us if you require advice on TPA models, options for raw materials, the specifics of the manufacturing process, or the feasibility of producing a particular type of polymer product.

Who is injection moulding suitable for?

Automotive industry

It is used in the manufacture of panels, housings, ventilation components, switches, etc. 

Consumer electronics

Gadget casings, connectors, device components (speakers, smartphones, household appliances). 

Industrial and engineering equipment

Manufacture of mechanical components: gears, brackets, fasteners.

Construction and infrastructure

Plastic components for building services, profiles, fixings and more.

Consumer goods

It covers a wide range of products — from packaging to kitchenware and toys.

Packaging

Lids, containers, etc. 

The benefits of working with Replast

Working with Replast is a reliable solution for companies requiring high-quality plastic parts manufactured using injection moulding. We use state-of-the-art equipment, work with various types of polymer raw materials and ensure consistent product quality in mass production.

Our key advantages: