Injection Moulding Machine for Zipper Sliders, Pullers and Moulded Tooth Chain
Plastic zipper sliders and pullers are made on horizontal injection moulding machines, while moulded tooth chain is moulded straight onto the tape on a dedicated zipper-chain machine. Slider size, cavity count and side cores set the machine for sliders. For chain, POM tooth shape and pitch along the tape decide whether the zip runs smoothly.
Selection starts by splitting the heading into its three parts, since each runs differently. Pratishna Engineers supplies horizontal injection moulding machines for plastic sliders and pull tabs, builds special purpose machines to application for tooth chain, and can recommend a configuration for your zip range.
Manufacturing Zipper Parts?
Share your slider, puller or chain sample, material and volume, and Pratishna Engineers will recommend a suitable machine.
Machine Requirements for Zipper Slider, Puller and Chain Moulding
Sliders, pullers and chain each load the machine in a different way. The points that usually decide the choice:
- Side cores to form the Y-shaped channel in sliders
- No flash in the slider channel, which jams the chain
- Even tooth size along the tape for smooth running
- Polished or textured faces on branded pull tabs
- PA66 dried before moulding sliders and pull tabs
- Tape feed and indexing built into a chain machine
Recommended Machine for Zipper Sliders, Pullers and Chain
Plastic sliders and pull tabs are small parts, so the E Series (75-180 T) suits many slider and puller moulds, and the H Series (120-350 T) takes larger multi-cavity or family tools. Moulded tooth chain needs a machine built to application around tape feed and indexing, and Pratishna Engineers builds special purpose machines to application.
Not Sure Which Machine You Need?
Send your zip samples and target volume 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 KBGarment & Apparel Components & Machine Guide
A guide to Garment & Apparel components, covering buttons, snap fasteners, zipper parts, cord stoppers, hangers, lingerie hardware, collar stays and tag pins. It explains POM, nylon and PP, high-cavity moulds for small parts, and how to match each part to a suitable machine.
Download PDFPDF · 204 KB
FAQs / Buyer Questions
What zip makers ask when planning slider, puller and chain moulding.
Which Injection Moulding Machine Is Used to Make Zipper Sliders and Pullers?
Standard horizontal machines in the E Series band handle plastic sliders and pull tabs, with the H Series for bigger tools. Tooth chain is a separate job for a special purpose machine that moulds onto the tape.Are Zipper Sliders Plastic or Metal?
Many sliders are die-cast zinc. Plastic sliders in POM or PA66 are used where a corrosion-free or lightweight zip is wanted. Pull tabs are often moulded in ABS, PC or POM even where the slider is metal.Why Is POM Used for Moulded Zipper Teeth?
POM is stiff, low in friction and holds its shape, so teeth engage cleanly and the slider runs without sticking. Tooth size has to stay even along the tape, which depends on steady melt temperature, injection and cooling.
What Causes a Moulded Slider to Jam?
Flash inside the channel, a mismatched side core or sink in the channel wall can catch the teeth. Well-fitted side cores and steady holding pressure keep the channel clean and true to size.Can Pratishna Recommend a Machine for My Zipper Parts?
Yes. Share slider, puller or chain samples or drawings, materials, zip sizes, mould dimensions, cavity count and monthly quantity, and Pratishna Engineers will recommend a standard or special purpose machine.Does the Machine Suit Other Garment Parts Too?
Yes. The standard machines used for sliders and pullers also suit cord stoppers, snap fasteners, belt adjusters and lingerie hooks, subject to each 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.
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Planning a New Injection Moulding Project?
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