Injection Moulding Machine for Pharma Vial Closures and Tamper-Evident Caps
Pharma vial and bottle closures with tamper-evident bands are made on horizontal injection moulding machines, in high-cavity hot runner moulds, from PP, HDPE or LDPE. Cavity count and the thread release method, stripped or unscrewed, set the machine size and stroke. Hot runner balance matters most, as uneven filling shows up as weak tamper bridges and scrap.
For pharma closures, selection focuses on shot-to-shot consistency across every drop, cycle stability over long runs and space for unscrewing drives where the thread needs them. Pratishna Engineers supplies horizontal injection moulding machines for pharma closure production and can recommend a configuration for your cap, mould and output.
Manufacturing Pharma Closures?
Share the closure drawing, neck finish and target output, and Pratishna Engineers will recommend a machine and quotation.
Machine Requirements for Pharma Closure and Tamper-Evident Cap Moulding
A pharma closure is judged with its container, so seal, thread and tamper features all have to hold together:
- Balanced hot runner filling across all cavities
- Even filling of thin tamper-evident band bridges
- Stripping or unscrewing ejection to suit the thread form
- Mould temperature control for consistent thread shrinkage
- Child-resistant outer and inner shells kept as a matched pair
- Liner seat and sealing bead free of flash
Recommended Machine for Pharma Closures
Pharma closures are light parts, but high-cavity tools spread over a wide platen area and unscrewing moulds add height and stroke. Lower-cavity stripping tools suit the E Series (75-180 T), with Hybrid PH Series (120-140 T) machines as an option. Higher cavity counts and unscrewing moulds usually point to H Series (120-350 T) presses, or C Series (140-320 T) where a wider platen helps.
Not Sure Which Machine You Need?
Send your closure drawing and cavity target 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 KBMedical Sector Components & Machine Guide
A guide to Medical Sector components, covering syringes, IV set parts, luer fittings, connectors, pipette tips, petri dishes, test cassettes and device housings. It explains medical-grade materials, clean moulding area needs, dimensional control, and how to match each part to a suitable machine.
Download PDFPDF · 206 KB
FAQs / Buyer Questions
What pharma packaging makers ask when planning closure capacity.
Which Injection Moulding Machine Is Used to Make Pharma Vial and Bottle Closures?
A horizontal machine sized by cavities and thread release. Lower-cavity stripped caps often suit Hybrid PH or E Series models, and high-cavity or unscrewing moulds go to the C or H Series.How Is the Tamper-Evident Band Moulded?
The band is moulded with the cap and joined to it by thin bridges that break on first opening. Some designs are slit or folded after moulding. Uneven filling leaves bridges too weak or too strong, so cavity balance is watched closely.Are Child-Resistant Closures Moulded Differently?
A push-and-turn closure is usually an outer and inner shell from two tools, assembled afterwards. The finished closure is tested with its container for child resistance and adult use, so both shells must hold their dimensions over the whole run.
Is the Liner Moulded in the Cap?
No. Liners and wads are fitted after moulding and form part of the seal specification. The moulded liner seat and sealing bead must stay clean and flash-free so the liner sits flat and seals on the bottle.Can Pratishna Recommend a Machine for My Pharma Closure?
Yes. Share the closure drawing, container neck finish, resin, cavities, thread release method, mould dimensions and annual quantity, and Pratishna Engineers will recommend a suitable machine.Does the Machine Suit Other Pharma Packaging Parts Too?
Yes, subject to the mould. It can also run droppers, dosing cups, specimen containers and inhaler actuator parts, each with its own tool.
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?
Share your component, material, mould and production target. Our engineering team will help you identify the right machine configuration.
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