Injection Moulding Machine for Bushings
Plain sleeve and flanged bushings are made on horizontal injection moulding machines, often in multi-cavity moulds, from POM, PTFE-filled POM, PA66 or MoS2-filled PA66. Machine size depends on cavity count and shot weight. Bore roundness matters most, and it comes from uniform wall thickness, balanced gating and even cooling around the core pin.
Bush moulds are usually compact, so the choice turns on accurate small shots, drying for nylon grades and steady core cooling over long runs. Pratishna Engineers offers horizontal injection moulding machines for bushing production and will propose a configuration once the bush size and mould are known.
Moulding Plastic Bushings?
Share your bush drawing, bore and fit details, compound and output target, and Pratishna Engineers will recommend a machine.
Machine Requirements for Bushing Moulding
A bush has to stay round and keep its bore size after it is pressed into the housing. Machine points to check:
- Small, accurate shot for multi-cavity bush moulds
- Even core cooling to keep the bore round
- Uniform wall thickness through the sleeve and flange
- Drying of PA66 and oil-filled nylon before moulding
- Moulded bore sized for press-fit closure in the housing
- Full barrel purge when switching between filled compounds
Recommended Machine for Bushings
Bushings are small parts, and most multi-cavity bush moulds sit within the E Series (75-180 T). The H Series (120-350 T) suits large flanged bushings, high-cavity hot runner tools or wide moulds that need more tie-bar space. Single-cavity tools for very small bushes are checked against the mould before a machine size is fixed.
Not Sure Which Machine You Need?
Send your bush size, compound 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 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
Common buyer questions on moulded sleeve and flanged bushes.
Which Injection Moulding Machine Is Used to Make Bushings?
A horizontal machine matched to the mould. Most sleeve and flanged bushes in multi-cavity tools fit the E Series, and the H Series takes larger flanged parts or high-cavity hot runner moulds.Can PTFE or UHMW-PE Bushings Be Injection Moulded?
No. Pure PTFE and UHMW-PE bushes are sintered or ram-extruded and then machined, so that is a machining enquiry. PTFE-filled POM or nylon compounds can be injection moulded where a self-lubricating bush is needed.How Do I Choose a Bushing Compound?
Choose against the pressure-velocity limit of the compound, not strength alone. POM with PTFE suits dry-running bushes, MoS2 or oil-filled PA66 handles heavier loads, and PEEK or PPS are used where heat or chemicals rule out other grades.
Why Does the Bore Get Smaller After Press Fitting?
Interference between bush and housing squeezes the sleeve inward, so the bore closes. The moulded inside diameter is sized for the installed condition, and nylon bushes also grow with absorbed moisture, which the fit has to allow for.Can Pratishna Recommend a Machine for My Bushing?
Yes. Share the bush drawing or sample, compound, part weight, mould dimensions, number of cavities and yearly quantity, and Pratishna Engineers will recommend a suitable machine.Does the Machine Suit Other Bearing and Wear Parts Too?
Yes. Machines in this range can also produce plastic bearing cages, roller bodies, gears and snap-fit spacers, depending on part size and 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.
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