Injection Moulding Machine for Plastic Gears
Plastic gears such as spur gears, helical gears and worm wheels are made on horizontal injection moulding machines from POM, PA66, glass-filled PA66 or PBT. Machine size follows gear diameter, cavity count and shot weight, and shaft inserts add loading time. Shrinkage matters most: gate position and even packing decide pitch error, runout and backlash.
Tooth form drifts with any change in melt temperature or holding pressure, so gear moulding needs a machine that repeats the same shot every cycle. Pratishna Engineers builds horizontal and hybrid injection moulding machines for gear makers and can suggest a set-up to match your gear and mould.
Manufacturing Plastic Gears?
Share your gear drawing, module and tooth count, material and yearly quantity, and Pratishna Engineers will suggest a suitable machine.
Machine Requirements for Plastic Gear Moulding
Gears are judged on tooth accuracy and running noise, and both depend on how steady the process is. Points to check:
- Centre or balanced multi-point gating for round, concentric teeth
- Repeatable shot size and holding pressure for constant shrinkage
- Stable mould temperature to limit pitch and backlash error
- Drying of PA66 and PA46 before moulding
- Insert loading room for gears moulded onto steel shafts
- Wear-resistant screw and barrel for glass-filled nylon
Recommended Machine for Plastic Gears
Spur and helical gears are usually small parts in multi-cavity moulds, and the Hybrid PH (120-140 T) suits them where electric injection helps hold tooth form. E Series machines (75-180 T) cover a broad spread of gear moulds, while the H Series (120-350 T) takes larger worm wheels, high-cavity tools and moulds with shaft inserts.
Not Sure Which Machine You Need?
Send your gear drawing and mould size for a machine suggestion.
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 KBEngineering Components & Machine Guide
A guide to Engineering components, covering gears, bushings, rollers, bearings, brackets, pneumatic fittings, sprockets and precision mechanical parts. It explains POM, nylon and filled grades, shrinkage, tolerance control, and how to match each part to a suitable machine.
Download PDFPDF · 206 KB
FAQs / Buyer Questions
Questions gear makers ask most before choosing a moulding machine.
Which Injection Moulding Machine Is Used to Make Plastic Gears?
A horizontal machine sized to the gear mould. Small gears in multi-cavity tools often run on Hybrid PH or E Series machines, and larger worm wheels or moulds with shaft inserts move up to the H Series.Which Material Should I Use for Moulded Gears?
POM suits quiet, low-friction gears with steady dimensions. PA66 takes shock loads better but absorbs moisture. Glass-filled PA66 adds stiffness for higher torque, though it wears the mating gear faster and shrinks differently along and across the flow.Why Does Gate Position Matter on a Moulded Gear?
Teeth near the gate pack and shrink differently from teeth far from it. A single side gate tends to give an oval gear with pitch and runout error, so a centre gate or balanced gates around the hub are preferred.
Can a Gear Be Moulded onto a Metal Shaft?
Yes. The shaft goes into the mould as an insert, usually knurled or flatted for torque grip and preheated to limit stress in the plastic around it. The mould and machine need room for insert loading.Can Pratishna Recommend a Machine for My Plastic Gear?
Yes. Share the gear drawing or sample, material, module and outside diameter, part weight, mould dimensions, number of cavities and yearly quantity, and Pratishna Engineers will recommend a suitable machine.Does the Machine Suit Other Engineering Parts Too?
Yes. The same machines can mould related drive parts such as sprockets and timing pulleys, plain bushings, bearing cages and small cams or levers, subject to the 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.
Talk to Our Engineers
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.
- Machine Sales
- +91 99690 38542
- Service Support
- +91 97689 28259
- Sales Email
- [email protected]