Precision injection molding

Precision injection molding is a highly technical process that requires the use of precision molds for the production of complex plastic components. Since 1986 Idea Stampi deals with this manufacturing technique either by creating proper molds or carrying out the injection molding process. Learn all the details on this page.

Advantages of our precision injection moulding processes

Reliability, efficiency, and repeatable quality — these are the foundations of our precision injection moulding services. At Idea Stampi, we combine advanced automation with real-time process control to deliver high-accuracy components at scale. Our production is designed to minimize waste, reduce post-processing, and speed up cycle times — making it the ideal solution for sectors where precision and reliability are essential.

Key Benefits:

Extreme precision

Tolerances down to ±0.001", suitable for intricate geometries and micro components

Advanced automation

Real-time monitoring and digital controls ensure process stability and consistent output

Waste reduction

Optimized processes significantly reduce material loss and production defects

Fast production cycles

High productivity with shorter lead times, even for complex or high-volume orders

Support for complex designs

Ideal for multi-component moulding, tight geometries, and detailed technical parts

Cost efficiency

Lower total production costs through process optimization and reduced manual labor

Our precision injection moulding services 

At Idea Stampi, we specialise in precision injection moulding for the production of plastic components with complex geometries and strict dimensional tolerances. With over 30 years of experience in custom mould manufacturing, we manage the entire process in-house — from concept to final product.

Our offering includes:

• Co-design and engineering of high-precision thermoplastic parts
• In-house mould construction with advanced CNC and EDM technologies
• Process optimisation for minimal waste and short cycle times
• Quality control systems for consistent performance and repeatability

We serve critical sectors such as:

• Medical: precision micro-components for diagnostic and wearable devices
• Automotive: functional parts requiring structural integrity and tight tolerances
• Electronics and optics: components with high aesthetic and dimensional accuracy

Thanks to our state-of-the-art equipment and skilled technical team, we provide a reliable and cost-effective solution for your precision plastic injection moulding needs — from prototyping to full-scale production.

Need an experienced high precision mold manufacturer?

Precision molds for plastic materials

Idea Stampi specializes in the production of precision molds for plastic materials. Our expertise and experience in precision injection molding allow us to work with a wide range of plastic materials, meeting the diverse needs of our clients.

We work with various plastic materials, including but not limited to:

• PMMA (polymethylmethacrilate)
• PEI (polyetherimide)
• PPS (polyphenylene-sulfide)
• PC (polycarbonate)
• PBT (polybutylene terephthalate)
• PPO (polyphenol oxidase)
• POM (polyoxymethylene)
• ABS (styrene co-polymers)
• PC/ABS
• PC (polycarbonate)
• IXEF (polyarylamide)
• PA 6/ PA 66 (nylon)
• PP (polypropylene)

Our team of experts can guide you in selecting the most suitable material for your specific requirements. Whether you need precision molds for small intricate components or larger parts, Idea Stampi has the expertise to deliver precise and reliable solutions.

How precision injection moulding works

The precision injection moulding process is fully automated and managed via computerised systems, ensuring consistency and flexibility. It follows a sequence of customisable steps, adaptable to different production needs.

Key process phases:

• Plastic injection moulding
• Coating (if required)
• Quality testing and inspections
• Final packaging
  
  

Customisation options:

• Mould design
• Mechanical supports
• Process parameters
• Semi-finished or finished component formats

How to select the right material for precision injection moulding

Choosing the correct plastic material is critical to achieving the desired precision, performance, and durability of your components. Each resin type offers specific mechanical, thermal, and chemical properties that must align with the product's functional requirements and its intended environment. 

Below is a breakdown of the key factors to consider:

Material types overview:

• Amorphous thermoplastics: offer superior dimensional stability and impact resistance
• Semicrystalline thermoplastics: provide enhanced chemical and electrical resistance

The choice of material affects tolerances, surface finish, and production consistency — making it a key strategic decision in any precision injection moulding project.

The variables that influence this process

Choosing a reliable partner and supplier is even more important in precision injection molding as this process depends on a series of variables - from the accuracy of the molds to thermodynamic control - that influence the final result.

Here are the most common ones:

1. The general quality of molds

Molds for precision injection molding are the result of accurate study, design and testing. We pay attention to a plurality of elements during their manufacturing process such as:

• design engineering 
• the mold cavity size, its position and the number of cavities 
• precision of parting surface 
• choice of materials –we usually use steel alloys or cast iron 
• dimensional tolerance 
• thickness of the bottom plate 
• runner size

All these elements acquire a growing importance as far as we consider dimension tolerances: while the majority of injection molds hold a tolerance of +/- .005″, precision injection molds have tolerances between +/- .002″ and +/- .001″ or even less.

2. Thermodynamic control of the mold

Consistent control of mold temperature is critical: the molds’ water lines balance the loss of heat from the plastic material so as to achieve a specific plastic shrink.

Individual temperature controllers help achieving and maintaining the desired temperature and fighting humidity that creates condensation and a chilling effect on the mold surface when it opens and closes.

3. Plastic material consistency

Physico-chemical characteristics vary depending on the kind of plastic. As a consequence, when designing the molds because this affects the quality and the precision on the injection molding process. At Idea Stampi we deal with polymers such as polypropylene, pvc, thermoplastic polyurethane, polycarbonate etc.

4. Accuracy of the molding machine

Precision injection molding machines are fundamental to good final results. In fact, high temperatures often affect the viscosity of the oil in the machines thus causing dimensional inconsistencies.

Would you like to know more about high-precision plastic injection molding?

FAQ – Precision Injection Moulding

What is precision injection moulding used for?

Precision injection moulding is used to produce highly detailed and dimensionally accurate plastic components for sectors such as automotive, medical, electronics, and optics.

Which materials are most suitable for precision injection moulding?

Materials like PC, POM, PA 66, PBT, and ABS are commonly used. The choice depends on the required mechanical, thermal, and chemical properties.

What tolerances can be achieved with precision moulding?

Typical tolerances range from ±0.005 mm to ±0.02 mm, depending on the part design, material, and mould quality.

Can Idea Stampi support product co-design?

Yes. We collaborate with clients in the co-design phase to ensure the feasibility and manufacturability of the component before mould construction.

What industries benefit most from your service?

We serve a wide range of industries, including automotive, medical devices, electronics, home appliances, and precision optics.