Multiple component - or assembly injection moulding

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The two-component - or multiple component - injection moulding is a special procedure in injection moulding technology. The specific characteristics are that either simultaneously or in sequence two molten plastics are injected into one mould. This procedure is available in several variants that are tailored towards the desired result (product).

Due to the different procedures that we apply we achieve certain technical possibilities and related benefits:


More functions in one component

Often injection moulding combines different plastics in one fixed unit to unite different functions in one component. The benefit is the reduction of the component number and an easier assembly. Furthermore the injection moulding components can help you avoid elaborate procedures for subsequent processing like adhesive bonding, welding or vulcanising.


  • Fitting, burglary protection and gap covering for house doors in one component
  • Differential pressure adjustment and multiple gasketing in one component for sanitary or fluid technology

Two-tone design and vision panel

Two differently coloured plastic can be combined to form one multicoloured, fixed unit. This way you can achieve multicoloured component surfaces, contrasting coloured imprints, logos, additional design elements or viewing panels without subsequent processing like printing and/or hot embossing.

Different surface properties

The combination of two plastics to one fixed unit for the creation of different surface properties improves the handling and the appearance of components and saves the use of additional haptic elements and further processing like bonding or assembly.

A selection our realized products

Fluid technology Separator housing for pressure controls
Technical components can be assembled in one injection moulding procedure with functional compounds or transparent units (with clear or structured surface).
Battery technology Casings with two-component injection moulding
Product example: 2K battery housing for power tools Tool technology: 1-fold 2-component injection molding tool, slide in four directions on the nozzle side, internal concealed injection of both components, hydraulic core pull Requirements: high dimensional accuracy, high visual standards, no gating in the visible area Material: PA 6, glass fiber content 30%, impact-modified

From idea to production - One-stop

A prerequisite for short development phases and high product quality

The benefits of collaboration with HECHT + DIEPER

HECHT + DIEPER is your expert in injection moulding of plastics



During development, our customers benefit from our many years of expert knowledge in the area of ​​construction, our own tool design, as well as our competence in production.



Together - as specialists, we know that only the joint development of components is the best prerequisite for the optimal functionality of your product.



Since more than over 40 years we have been developing and producing technically challenging components of the highest precision for various industries.



In order to be able to deliver quickly, we believe in long standing and reliable cooperation with local logistics partners.



Regular optimization in development, toolmaking and production is a continuous process for us and thus the foundation for high efficiency and customer satisfaction.



Everything is local. We develop and produce plastic components - from the idea to production - one-stop. Our service enables short communication channels.


We would love to hear from you!

If we have aroused your interest, we look forward to your inquiries.