Injection Moulding Machine for Tag Pins, Seals and Label Fasteners
Tag pins, seals and label fasteners are made on horizontal injection moulding machines in very high-cavity moulds, usually from PP or PA6, with PE for some seals. Pins are moulded as continuous clips on a runner bar that feeds the tagging gun. Cycle time decides the business case, and break-off force at the pin root is the specification.
Selection focuses on fast cycles and clean ejection of long, flat clips without bending pins, with the mould built around the clip format the gun accepts. Pratishna Engineers supplies horizontal injection moulding machines for tag pin production and can recommend a configuration for your clip and seal tools.
Manufacturing Tag Pins?
Share your clip sample, tagging gun type, material and daily output, and Pratishna Engineers will recommend a suitable machine.
Machine Requirements for Tag Pin and Label Fastener Moulding
On a tag pin clip the runner bar is part of the product, so the tool, fill and ejection are all set around it. Points to check:
- Even fill to the last pin on the bar
- Consistent break-off force at every pin root
- Flat ejection of the clip without bent pins
- Clip pitch held to suit the tagging gun
- PA6 conditioned so fine pins do not snap
- Very short cycle with a high cavity count
Recommended Machine for Tag Pins and Label Fasteners
Each clip is light but long, so mould width and an even fill along the bar count as much as clamping force. The E Series (75-180 T) suits many tag pin and seal moulds. Wider tools carrying several clips per shot, or very high-cavity layouts, are better placed on the H Series (120-350 T).
Not Sure Which Machine You Need?
Send your clip sample and gun type 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
Answers to questions tag pin and seal makers bring to our engineers.
Which Injection Moulding Machine Is Used to Make Tag Pins?
A horizontal machine sized for wide, light clip moulds and short cycles. E Series machines handle typical tag pin and seal tools, and the H Series takes larger moulds with more clips or cavities per shot.Why Is the Runner Bar Kept With the Pins?
The bar holds the pins at the spacing the tagging gun indexes, so it is moulded as part of the clip and not cut off as scrap. Its section, gate positions and ejection are designed so the clip feeds cleanly.What Controls Break-Off Force at the Pin Root?
Each pin joins the bar at a narrow neck, and that neck sets how easily the gun separates it. Short shots, flash or uneven packing at that neck change the force, so fill balance and holding pressure must stay steady along the whole bar.
Which Material Suits Tag Pins, PP or PA6?
PP is common for standard pins and is simple to process. PA6 gives finer, stronger pins for delicate fabrics but absorbs moisture, so it is dried before moulding and then conditioned so pins are not brittle in the gun.Can Pratishna Recommend a Machine for My Tag Pin?
Yes. Share the clip sample or drawing, tagging gun type, pin length range, material, mould dimensions, pins per clip and daily output, and Pratishna Engineers will recommend a suitable machine.Does the Machine Suit Other Garment Parts Too?
Yes. Collar stays, shirt clips, plastic buttons and snap fasteners can run on the same class of machine, 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.
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]