Injection Moulding Machine for Pen Barrels
Pen barrels are made on horizontal injection moulding machines in multi-cavity hot runner moulds, from crystal PS, SAN, PP or copolyester. Cavity count, shot weight and barrel length set the machine size. The long, slender core is the process point to watch: if it deflects under injection pressure, the wall runs uneven and the refill seats off centre.
Machine selection for pen barrels centres on steady shot-to-shot injection across many cavities, fast injection for the thin wall and a mould size the platens can hold. Pratishna Engineers supplies horizontal injection moulding machines for pen barrel production and can recommend a configuration for your barrel, mould and output.
Manufacturing Pen Barrels?
Share your barrel drawing or sample, material, cavity count and monthly output, and Pratishna Engineers will recommend a suitable machine.
Machine Requirements for Pen Barrel Moulding
A pen barrel is a long, thin tube where wall uniformity and clarity decide whether the part passes. Points to check when selecting a machine:
- Shot weight matched to a high-cavity hot runner mould
- Fast injection to fill a thin wall over a long flow
- Even wall around the core to hold bore concentricity
- Polished cavities and dried resin for clear barrels
- Bore and tip taper that seat the refill straight
- Stable cycles so every cavity fills to the same weight
Recommended Machine for Pen Barrels
A single barrel weighs little, so machine size comes from the number of cavities and the length of the mould. Many pen barrel moulds fit the E Series (75-180 T). High-cavity hot runner tools for long barrels, or moulds with a wider footprint, may move to the C Series (140-320 T) or H Series (120-350 T).
Not Sure Which Machine You Need?
Send your barrel and mould details 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 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
Questions pen makers ask most often before choosing a barrel machine.
Which Injection Moulding Machine Is Used to Make Pen Barrels?
Pen barrel moulds run on horizontal machines sized to the complete mould rather than to one barrel. Tools with fewer cavities often sit in the E Series range, while long barrels in high-cavity hot runner tools move up to the C or H Series.Why Does a Pen Barrel Come Out With an Uneven Wall?
A long, thin core forms the bore, and melt pressure can push it sideways. Gating at the end of the barrel, support for the free end of the core and a controlled fill speed keep the bore concentric.Do Transparent Pen Barrels Need Drying?
SAN and copolyester pick up moisture and should be dried before moulding, or the barrel shows splay and haze. Crystal PS usually needs little drying. A polished cavity and clean material handling keep the ink window clear.
Can the Barrel Be Printed or Decorated After Moulding?
Yes. Printing, hot stamping and other decoration run at separate stations after moulding. Moulding has to deliver a clean surface, free of flow lines and ejector marks where the print sits.Can Pratishna Recommend a Machine for My Pen Barrel?
Yes. Share the barrel drawing or sample, material, part weight, mould size, number of cavities, runner type and required output, and Pratishna Engineers will recommend a suitable machine.Does the Machine Suit Other Stationery Parts Too?
Yes. The same class of machine can mould pen caps, marker barrels, sharpeners and plastic rulers, subject to the mould size and shot weight of each part.
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]