Which Injection Moulding Machine Is Used to Make Moulded Zipper Chain?

A dedicated zipper-chain machine, built to application, rather than a standard horizontal press. Pratishna Engineers handles this under special purpose machines and sizes the build to the chain and tape.

Why Is Acetal Used for Moulded Zip Teeth?

Acetal is self-lubricating, so the chain runs smoothly and quietly over a long cycle life. It also resists corrosion and UV, which is where metal chains on outdoor bags and covers can fail.

How Are Moulded Zip Teeth Coloured?

The teeth are moulded in coloured resin or with masterbatch to match the tape, instead of being painted afterwards. Moving to the next shade needs a purge so streaks of the old colour do not appear.

Can a Standard Horizontal Machine Mould Zipper Chain?

No. The tape has to be fed, held and indexed through the mould between shots, with teeth formed on both faces. A general-purpose press is not set up for that, so the process needs a machine built for it.

Can Pratishna Recommend a Machine for My Moulded Zipper Chain?

Yes. Share the chain size, tooth drawing or sample, tape width and type, colours, output per shift and any existing equipment, and Pratishna Engineers will advise on a special purpose build.

Does the Machine Suit Other Zip and Luggage Parts Too?

Not usually, as it is built for chain. Zipper sliders, zip pull tabs, cord locks and bag buckles are moulded on standard horizontal machines, which Pratishna Engineers can also advise on.

Injection Moulding Machine for Moulded Zipper Chain and Tooth Elements

Moulded zipper chain teeth are made from POM on zipper-chain injection moulding machines, which mould each tooth directly onto both sides of the fabric tape. Tooth size, tape width and the number of teeth formed per shot set the machine. Keeping tooth pitch and profile constant matters most, so the slider runs smoothly along the chain.

Zipper chain moulding uses a dedicated machine that feeds and indexes the tape, rather than a general-purpose press. Pratishna Engineers builds special purpose injection moulding machines to application and can discuss one for your chain size and tape.

Moulding Zipper Chain?

Share your chain size, tape width and output target, and Pratishna Engineers will discuss a machine built to your application.

Request a Machine Recommendation Download Catalogue

Machine Requirements for Moulded Zipper Chain

Every tooth along the tape has to be identical, or the slider catches and the chain splits. A chain machine needs:

Tape feed and accurate indexing between shots
Mould that grips the tape and forms teeth on both faces
Constant tooth pitch and profile along the whole chain
Stable POM moulding with clean parting lines on each tooth
Coloured resin or masterbatch matched to the tape shade
Small screw and barrel for a repeatable shot per row

Recommended Machine for Moulded Zipper Chain

Moulded tooth chain needs a special purpose injection moulding machine built to application, with a tape feed, a mould that forms teeth on both sides of the tape and a small, repeatable shot. Pratishna Engineers can review your chain size, tape and output target and advise on a suitable build.

Special Purpose Injection Moulding Machines - built to application

Not Sure Which Machine You Need?

Share your chain and tape details to discuss a machine built to application.

Request 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.

Special Purpose Injection Moulding Machine Selection Guide
A step-by-step guide covering the key inputs needed to specify a machine built to application: component and process, 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 KB
Luggage & Bags Components & Machine Guide
A guide to Luggage & Bags components, covering trolley parts, spinner wheels, buckles, zipper sliders, handle grips, lock housings and case latches. It explains POM, nylon and PP, two-material parts, wear resistance, and how to match each part to a suitable machine.
Download PDFPDF · 206 KB

FAQs / Buyer Questions

Questions zip makers ask before they move into moulded tooth chain.

Which Injection Moulding Machine Is Used to Make Moulded Zipper Chain?
A dedicated zipper-chain machine, built to application, rather than a standard horizontal press. Pratishna Engineers handles this under special purpose machines and sizes the build to the chain and tape.
Why Is Acetal Used for Moulded Zip Teeth?
Acetal is self-lubricating, so the chain runs smoothly and quietly over a long cycle life. It also resists corrosion and UV, which is where metal chains on outdoor bags and covers can fail.
How Are Moulded Zip Teeth Coloured?
The teeth are moulded in coloured resin or with masterbatch to match the tape, instead of being painted afterwards. Moving to the next shade needs a purge so streaks of the old colour do not appear.

Can a Standard Horizontal Machine Mould Zipper Chain?
No. The tape has to be fed, held and indexed through the mould between shots, with teeth formed on both faces. A general-purpose press is not set up for that, so the process needs a machine built for it.
Can Pratishna Recommend a Machine for My Moulded Zipper Chain?
Yes. Share the chain size, tooth drawing or sample, tape width and type, colours, output per shift and any existing equipment, and Pratishna Engineers will advise on a special purpose build.
Does the Machine Suit Other Zip and Luggage Parts Too?
Not usually, as it is built for chain. Zipper sliders, zip pull tabs, cord locks and bag buckles are moulded on standard horizontal machines, which Pratishna Engineers can also advise on.

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]