Injection Moulding Machine for Rollers
Conveyor, guide and idler roller bodies are made on horizontal injection moulding machines from POM, PA6, glass-filled PA6, HDPE or PP, depending on load and service. Roller length and diameter set mould size and shot weight. Thick hubs are the main risk, so they are cored out and ribbed to avoid sink and voids.
Rollers run quiet only when they turn true, so the machine has to pack the bearing seat and shell evenly from one shot to the next. Pratishna Engineers makes horizontal injection moulding machines that suit roller moulds of this kind and can help select one for your roller.
Manufacturing Plastic Rollers?
Tell Pratishna Engineers the roller diameter, length, bearing type, material and monthly output, and get a machine recommendation.
Machine Requirements for Roller Moulding
Roller bodies are long, round parts with a bearing seat at each end, and the machine has to fill them without voids. Points to check:
- Cored-out hubs and ribs instead of solid thick sections
- Enough shot weight for long roller shells
- Holding pressure control against sink at the hub
- Bearing seat tolerance held for pressed-in or insert races
- Opening stroke and mould height for long roller cores
- UV-stabilised or food-contact grades for outdoor or wash-down use
Recommended Machine for Rollers
Small guide and idler rollers in multi-cavity moulds often fit the E Series (75-180 T). Longer conveyor roller shells need more shot weight and opening stroke, which moves them to the C Series (140-320 T), and the H Series (120-350 T) takes the largest roller moulds and glass-filled jobs with heavy hubs.
Not Sure Which Machine You Need?
Share your roller drawing and mould size to get the right machine size.
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
What roller makers usually ask before buying a machine.
Which Injection Moulding Machine Is Used to Make Rollers?
Size follows the roller. E Series machines suit small guide and idler rollers, C Series machines handle longer conveyor shells, and the H Series covers the largest roller moulds in the range.How Are Thick Roller Hubs Moulded Without Sink or Voids?
Solid hubs shrink inward as they cool, leaving sink on the surface and voids inside. Coring the hub out, adding ribs to carry the load and keeping holding pressure on until the gate freezes solves most of it.Are Bearings Moulded into the Roller or Pressed In?
Both are used. Bearings are often pressed into a moulded seat after the part has cooled, or placed in the mould as inserts. Either way, the moulding has to hold the seat size so the bearing sits square.
Which Material Suits Outdoor or Wash-Down Rollers?
Outdoor rollers need a UV-stabilised grade, and rollers on food or wash-down lines need a food-contact grade. Both are chosen before the mould is built, since shrinkage differs between POM, nylon, HDPE and PP.Can Pratishna Recommend a Machine for My Roller?
Yes. Share the roller drawing or sample, material, bearing arrangement, part weight, mould dimensions, number of cavities and yearly quantity, and Pratishna Engineers will recommend a suitable machine.Does the Machine Suit Other Conveyor and Engineering Parts Too?
Yes. Rollers share machines with castor wheels, chain and conveyor components, sprockets and bushings, subject to the mould and shot weight.
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]