Injection Moulding Machine for Pen Refill Parts
Pen refill parts come from horizontal injection moulding machines in PP or PE, though only the tip holder, end plug and some gel refill bodies are moulded. The ink tube is extruded, the tip is machined metal and the ball is bought in. Cavity count sets machine size, and the holder bore must grip tube and tip without splitting.
Machine selection for refill parts focuses on very small shots held steady across many cavities, and on fits that stay tight on the tube. Pratishna Engineers supplies horizontal injection moulding machines for these mouldings and can recommend a configuration once the moulded part is confirmed.
Moulding Pen Refill Parts?
Tell us which refill part you mould, with drawing, material and output, and Pratishna Engineers will recommend a suitable machine.
Machine Requirements for Pen Refill Part Moulding
Most of a refill is extruded, machined or bought in, so the moulding brief covers small push-fit parts. Points to check when selecting a machine:
- Very small shot weight held steady across many cavities
- Press-fit bore that grips the tube without splitting
- End plug fit that closes the tube end cleanly
- Flash-free parting line on tiny holder parts
- PP or PE grade compatible with the ink
- Short, stable cycles for high-volume commodity parts
Recommended Machine for Pen Refill Parts
Refill parts are among the smallest stationery mouldings, so the machine is sized by the number of cavities and the mould frame rather than the part. E Series machines (75-180 T) cover many refill holder and end plug moulds. Moulded gel refill bodies or larger multi-cavity tools may suit the H Series (120-350 T).
Not Sure Which Machine You Need?
Share the refill part drawing and cavity plan for a 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 KBStationery Components & Machine Guide
A guide to Stationery components, covering pen barrels, caps, refills, markers, rulers, sharpeners, clips, ID card holders and desk tools. It explains high-cavity hot runner moulds, clear parts, small mechanisms, and how to match each part to a suitable machine.
Download PDFPDF · 204 KB
FAQs / Buyer Questions
What buyers ask first when a refill programme reaches the moulding stage.
Which Injection Moulding Machine Is Used to Make Pen Refill Parts?
Refill holders, adaptors and end plugs run on horizontal machines in multi-cavity moulds. Tool size, not part size, decides the tonnage, so many refill moulds fit the E Series, with the H Series for larger tools.Which Parts of a Pen Refill Are Injection Moulded?
Only some. Moulded parts are the tip holder or adaptor, the end plug and the body of some gel and rollerball refills. Ink tubes are extruded PP, tips are stamped or machined brass or steel, and balls are bought in.What Should I Confirm Before Getting a Refill Mould Quoted?
Confirm which part is being quoted. A refill programme is mostly extrusion, stamping and assembly, so the moulding quote covers the holder, end plug or body only. Share the tube diameter and tip design so the press fit can be set.
How Is the Press Fit on a Refill Holder Kept Consistent?
Fit depends on bore shrinkage, so mould temperature, holding pressure and gate size need to stay stable across cavities. Worn cavities that start to flash change the bore, so check parts against the tube and tip at regular intervals.Can Pratishna Recommend a Machine for My Pen Refill Part?
Yes. Share the part drawing or sample, material, part weight, mould size, number of cavities and required output, and Pratishna Engineers will recommend a suitable machine.Does the Machine Suit Other Stationery Parts Too?
Yes. The same machines can run marker end plugs, pen caps, sharpener bodies and small file clips, provided the mould fits the platens and the shot weight suits the barrel.
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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