multi-component injection moulding
Maximum functionality in one component

Multi-component injection molding combines the best properties of Plastic, elastomer and Metal in a single component. This process enables a variety of innovative solutions for a wide range of applications.
Thanks to proven manufacturing processes, we process several components into 2K and 3K molded partsWith our many years of experience in Plastic Injection Molding and the production of technically sophisticated silicone components we implement even complex projects precisely. Even the combination of three materials is easily possible. For example, metal elements with plastic molded and at the same time with a elastomer seal be provided.
We accompany you through the entire project flow - of the Tool and pattern production about the Production up to the optional assembly of series parts.
For an individual offer we need either a technical drawing or an existing one samplesIf no template is available, our experienced product Designer like the construction and development a suitable molded part for her.
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References of our molded parts in multi-component injection molding
Here you will find selected reference projectsthat illustrate the versatility, precision and efficiency of our manufacturing solutions in multi-component injection molding.
Our projects show how different materials can be combined in a single component to highest functionality and optimal performance We use innovative processes to precisely implement even the most complex requirements of our customers.
Get inspired and discover which customized solutions we can realize for your industry.
Application examples for multi-component injection molding
The multi-component injection moulding enables the combination of different materials in one component. This creates products with improved functionality, durability and comfortHere are some examples from different industries:
Handles with cushioning
Ergonomic handles are manufactured for tools, handheld devices or bicycles. While the hard component ensures stability, the soft component offers pleasant cushioning. This improves grip, comfort and vibration absorption.
automotive sealing systems
In the automotive industry, multi-component injection molded parts are used in seals, bearings, steering components and shock absorbers. They offer optimal protection against moisture, dirt and noise. At the same time, they reduce vibrations and increase driving comfort.
Medical equipment
In medical devices, the hard plastic component ensures a stable structure, while the soft silicone component improves skin compatibility. This increases wearing comfort and enables safe use.
Electronic enclosures
Electronic devices benefit from robust housings reinforced by multi-component technology. Integrated seals provide additional protection, while special materials ensure electrical conductivity or shock resistance.
Domestic appliances
Multi-component components increase the longevity and safety of household appliances. In coffee machines, for example, special material combinations improve durability and ensure effective insulation.
lightweight constructions
In the aerospace industry, multi-component injection molding helps reduce weight without compromising strength. This creates lightweight but durable components that can withstand high loads.
sports and leisure items
Ergonomic handlebar grips for bicycles, ski and snowboard grips or shock-absorbing sports equipment are just a few examples of multi-component injection molding in the leisure sector.
Electronic components
Multi-component injection molded parts are also used in the electronics industry. For example, they are used for housings of smartphones or tablets in order to achieve a combination of durability and modern design.
Advantages of multi-component injection molding
material combination for optimal properties
The Multi-component injection molding enables the combination of different materials in a single component. This creates products with highest functionality, durability and efficiencyThis technology is used in numerous industries – from Automotive industry about the Medical Technology and Aerospace.
But what specific advantages does the procedure offer? Find out how the 2K and 3K injection molding Can optimize your components:
1. Material combination for optimal properties
Multi-component injection molding allows thermoplastics, elastomers and metals to be combined in a targeted manner. This technology opens up a multitude of new possibilities for developing components with customized mechanical, thermal and chemical properties.
The combination of different Shore hardnesses Flexible and stable structures can be created. It is also possible to use metal inserts with a protective layer made of TPE to make components vibration-damping. In the electronics industry, the use of conductive plastics helps to shield against electromagnetic radiation.
A typical example is a 2K housing with an integrated seal, which provides reliable IP68 protection while simplifying installation.
2. Design diversity and precise geometries
Multi-component injection molding allows the realization of complex shapes that would not be possible with conventional manufacturing methods.
Filigree structures with wall thicknesses from 0,5 mm enable precise design, while the seamless connection of different materials ensures greater stability. Especially in electronic control units, manufacturers benefit from TPU sealswhich are integrated directly into the injection molding process and provide reliable sealing.
This technology not only improves the functionality of the products, but also contributes to a longer service life and greater resistance to external influences.
3. Weight reduction for lightweight constructions
Weight saving plays a crucial role in the automotive and aerospace industries. By using fiber-reinforced plastics or hybrid components Lighter, yet stable components can be manufactured from aluminum and TPE.
The targeted selection of materials enables a weight reduction of up to 30%without compromising mechanical strength. A 3K body part with an aluminum support structure and an elastic protective layer shows how efficiently this technology can be used.
The reduced weight not only improves energy efficiency but also reduces material usage, thereby lowering production costs.
4. Cost efficiency through functional integration
The ability to combine several functions in one component makes multi-component injection molding particularly economical. While the initial investment in tools and machines can be higher, the reduced assembly effort long-term save costs.
Fewer assembly steps and a lower scrap rate lead to optimized production with lower material consumption.
An example is a rubber-metal damping element, which is manufactured by 2K injection molding without separate bonding. The production time can therefore reduced by up to 40%, which enables companies to significantly increase their efficiency.
5. Improved functionality and durability
By combining hard and soft materials, components can be optimized for extreme operating conditions. TPU overmolding can protect sensitive metal components from corrosion and abrasion, while vibration-damping elastomers enable vibrations to be reduced.
An overmolded metal bolt with a special protective coating is an example of the increased durability of these components. Particularly in the machine and automotive industries, such solutions help to extend the service life of components and minimize maintenance effort.
6. Wear resistance and longer service life
Components that are exposed to high mechanical stress benefit from additional protective layers. By using abrasion-resistant elastomers or PTFE-coated materials wear and tear can be reduced and service life extended.
Housing edges with integrated TPU reinforcements provide improved shock resistance and increase resistance to mechanical influences.
A tool grip system that combines a hard plastic base with a non-slip rubber overmold shows how this technology improves safety and ergonomics.
7. Efficient manufacturing with shorter production times
A major advantage of multi-component injection molding is the shortened production timeThe ability to combine different materials in a single injection molding process reduces assembly effort and saves valuable production time. At the same time, optimized process control minimizes waste and ensures consistently high quality.
A 3K connector housing, manufactured in a single manufacturing step, combines the hard housing, the flexible seal and the conductive shield. This technology not only improves product quality but also significantly reduces manufacturing costs.
8. Sustainability and environmental friendliness
In addition to economic and functional advantages, multi-component injection molding also offers ecological benefits. The targeted combination of materials reduces raw material consumption and minimizes material wasteThe use of lighter components also reduces energy consumption in vehicles and machines.
Recyclable material combinations enable sustainable production, while optimized manufacturing processes help to reduce rejects and production waste. A recyclable 2K component can, for example, serve as a replacement for conventional, multi-part assemblies and thus reduce the CO₂ footprint.
Conclusion: Multi-component injection molding as a key technology
Multi-component injection molding opens up new possibilities for combining different material properties in a single manufacturing process. The targeted selection and combination of plastics, elastomers and metals creates components with high functionality, a longer service life and an optimized cost structure.
Companies not only benefit from improved product properties, but also from a resource-saving and economically attractive manufacturing process. This technology is suitable for a wide range of industries, from the automotive industry to medical technology and the electronics industry.
technology in multi-component injection molding
insert technique
The insert technique is a proven method in Multi-component injection molding, which permanently bonds metal and plastic components. Threaded bushings, screws, plug contacts or other inserts inserted into the injection molding tool and connected to the thermoplastic carrier material molded.
This technology ensures a reliable and durable connection that is used in numerous industries. Especially in the automotive and electronics industries This process offers advantages because it enables high-precision hybrid components that are both stable and lightweight.
outsert technique
The outsert technique makes that possible Spraying of plastic elements onto prefabricated metal supportsThe so-called "outsert", i.e. the metal component, is placed in the injection mold before the thermoplastic material is applied. This method creates a stable and resilient connection that combines the advantages of both materials.
A key difference to insert technique is lying in volume ratio of the materialsWhile with the insert technique the plastic volume is usually larger than the metal, with the outsert technique it is the other way round. This creates high-strength and dimensionally stable hybrid components, which are suitable for demanding applications in the automotive industry, mechanical engineering and medical technology suitable.
Metal components in elastomer composites – flexibility and damping
In addition to the combination of plastic and metal, we also offer the integration of machined metal components with elastomers This involves a milled metal component, for example stainless steel, aluminum-zinc or copper alloys, bonded to an elastomer. This technology enables highly functional solutions for applications with special requirements for cushioning, flexibility and durability.
Elastomer materials such as silicone, EPDM or NBR offer excellent damping properties and high chemical resistance. By combining different color and hardness variations Components can be tailored precisely to customer-specific requirements. This creates high-precision components, for example as Shock absorbers in the automotive industry, sealing elements in mechanical engineering or transport rollers in industrial plants .
Thermoplastics – Perfect material combinations for optimal results
The multi-component injection molding offers a variety of possibilities to create functional and visually appealing products. This process allows combine hard and soft plastics in one component or produce multi-colored products efficiently. To ensure that the desired material properties are achieved, the correct selection of materials is crucial.
We have a Material overview which shows which combinations can be combined particularly well and which are less suitable. This overview helps developers and designers to select the optimal material pairing for their individual requirements. The right combination of materials contributes significantly to the quality, durability and performance of the final product.
You can also find this table in our Design Guide Plastic Molded Parts >>
Conclusion – High-quality hybrid components for demanding applications
The Multi-component injection molding offers a precise, economical and efficient solution for the production of hybrid components with plastic, metal and elastomer, By the insert and outsert technique As well as the combination with special elastomers, tailor-made components with outstanding mechanical, thermal and chemical properties can be realized.
No matter whether for them automotive industry, medical technology or mechanical engineering – this technology creates long-lasting and functional solutions that meet the highest requirements.
Contact Usto learn more about the optimal manufacturing solution for your specific application.
In addition, we also offer machined metal components in elastomer composites. A milled metal component, for example made of stainless steel, aluminum-zinc or copper alloys, is bonded to the elastomer with a material bond. Common elastomer materials such as silicone, EPDM, NBR and others enable a wide range of possible applications and specific damping characteristics.
The combination of different color and hardness variations of the soft component opens up numerous variants that can be precisely tailored to the requirements of customer-specific applications. The milled metal base enables classic shaft-hub connections or screw threads for connection to peripheral elements. This opens up applications in various sectors, such as mechanical and plant engineering, the automotive industry for shock absorbers or in the industry for transport rollers.
Design Guide Plastic Molded Parts & Free Sample Card
Our Design Guide for Plastic Molded Parts and the free sample card with plastic erosion structures are aimed specifically at developers, designers and buyers who are intensively involved in the development and production of plastic molded parts . employ
The construction guide a comprehensive and detailed overview of engineering plastics and their diverse applications in practice. In addition, a special focus is placed on important topics such as material selection and the Mechanical Design. This guide will help you make your projects more efficient while achieving better results.
Our N&H plastic sample card, which is made of black ABS Plastic was cast, shows you 12 different SPI surface treatments, ranging from polished to rough textures. In addition, the sample card contains the 12 most common VDI 3400 Surface Texturesthat will help you plan and implement your Plastic molded parts can support.
Thanks to this comprehensive overview, you can more easily select the right surfaces for your projects. At the same time, you can optimize the quality of your plastic parts in a targeted manner. The sample card is a valuable tool that will accompany you during every phase of your planning and help you make precise decisions.