Injection Moulding Machine for Optical Lenses
Optical lenses for cameras, sensors, LEDs and collimators are made on horizontal injection moulding machines from optical PMMA, PC or COP, often in small multi-cavity moulds. Machine size depends on lens diameter, cavity count and runner volume. The deciding process point is shot-to-shot stability: slow fill, long holding pressure and steady mould temperature set the achievable tolerance.
Machine selection for precision lenses focuses on injection repeatability, a small shot well matched to the barrel and close mould temperature control. Pratishna Engineers supplies horizontal and hybrid injection moulding machines for optical lens moulding and can recommend a configuration for your lens, mould and resin.
Moulding Optical Lenses?
Share your lens drawing, resin grade and optical acceptance criteria, and Pratishna Engineers will recommend a machine and quotation.
Machine Requirements for Optical Lens Moulding
A moulded lens copies the mould surface and holds its shape only as well as the process repeats. Points to check when selecting a machine:
- Mirror-polished cavity inserts kept free of oil and dust
- Slow controlled fill to avoid flow lines and jetting
- Long, steady holding pressure against sink and shrinkage
- Thorough drying of PC and PMMA to prevent splay
- Shot size matched to barrel to limit residence time
- Stable mould temperature on both mould halves
Recommended Machine for Optical Lenses
Single lenses and small multi-cavity lens moulds are light shots, so the Hybrid PH Series (120-140 T) suits them where its electric injection gives repeatable fill and pack. The E Series (75-180 T) covers most other lens tools. Larger collimator and LED lens arrays, or higher cavity counts, move to the C Series (140-320 T) or H Series (120-350 T).
Not Sure Which Machine You Need?
Send your lens drawing and cavity plan for a machine recommendation.
Why Choose Pratishna Engineers?
- Application-Based Machine Selection
- In-House Engineering & Manufacturing
- Multiple Machine Series
- Production-Focused Solutions
- End-to-End Technical Support
- Industry-Specific Solutions
- Machine Lifecycle Support
Injection Moulding Machine Buyer Resources
Download practical resources to help you select, size and specify the right machine.
Horizontal Injection Moulding Machine Selection Guide
A step-by-step guide covering the key inputs needed to select the right machine: product weight, projected area, number of cavities, plastic material, required clamping force, shot / injection capacity, mould dimensions, production quantity, cycle time and automation requirement.
Download PDFPDF · 265 KB
How to Calculate Clamping Force for an Injection Moulding Machine
A clear methodology that explains how clamping force is calculated, covering projected area, injection pressure, safety factor, number of cavities and material considerations.
Download PDFPDF · 363 KBOptical Components & Machine Guide
A guide to Optical components, covering precision lenses, spectacle frames, light guides, thick-wall lenses, visor lenses, lens barrels and fibre connector housings. It explains optical PC and PMMA, drying, flow line control, and how to match each part to a suitable machine.
Download PDFPDF · 208 KB
FAQs / Buyer Questions
Questions lens makers and optical buyers ask before choosing a moulding machine.
Which Injection Moulding Machine Is Used to Make Optical Lenses?
Lens tools usually sit at the lower end of the tonnage range. Pratishna Engineers would start with the Hybrid PH or E Series, moving to the C or H Series for large arrays or many cavities.Which Is Better for a Lens, PMMA, PC or COP?
PMMA gives clarity and scratch resistance at lower cost. PC takes impact but needs a higher mould temperature and is more prone to stress birefringence. COP and COC absorb very little moisture, so they hold their shape in humid use.Why Does a Clear Lens Show Splay or Silver Streaks?
Splay usually comes from moisture in undried resin, or from material degraded by sitting too long in the barrel. Dry PC and PMMA to the resin supplier’s conditions and keep the shot size suited to the barrel.
What Mould Finish Does an Optical Lens Need?
Optical faces are polished to a mirror finish, usually on separate inserts, because the lens copies every mark on the steel. A clean moulding area and ejection kept away from the optical faces matter as much as the polish.Can Pratishna Recommend a Machine for My Optical Lens?
Yes. Share the lens drawing or sample, resin grade, lens diameter and thickness, cavity count, mould size and monthly quantity, and Pratishna Engineers will recommend a suitable machine.Does the Machine Suit Other Optical Parts Too?
Yes. Light guides, instrument windows, sunglass and visor lenses, and lens holders are related parts that can run on the same class of machine, each checked against its own mould.
Technical Disclaimer
Disclaimer: The information provided in this webpage is for general informational and educational purposes only. It is based on technical references and industry information available at the time of preparation and may be subject to change. It does not constitute engineering, technical, commercial or professional advice, nor does it constitute a quotation, specification, warranty or contractual commitment by Pratishna Engineers.
Actual injection moulding machine and process requirements vary according to the component design, material, mould, production volume, machine configuration and operating conditions. The information, examples, calculations and recommendations provided should be independently evaluated and verified for the specific application before making any equipment, process or production decision. Information obtained from third-party sources remains subject to the accuracy and limitations of those sources.
Limitation of Liability: Pratishna Engineers makes no representation or warranty, express or implied, regarding the completeness, accuracy or suitability of the information for any particular application. To the extent permitted by applicable law, Pratishna Engineers shall not be liable for any loss, damage, cost or consequence arising from reliance on or use of the information contained in this webpage. Final machine selection, configuration and application suitability should be confirmed with Pratishna Engineers based on complete and accurate project requirements.
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Planning a New Injection Moulding Project?
Share your component, material, mould and production target. Our engineering team will help you identify the right machine configuration.
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