Injection Moulding Machine for Feeding Bottle Caps
Feeding bottle caps are made on horizontal injection moulding machines, usually in multi-cavity moulds, from food-grade PP. Machine size depends on cavity count, the projected area of ring and hood, and whether the mould strips or unscrews the internal thread. Thread roundness matters most, since an oval ring leaks at the teat.
For cap sets, machine selection centres on steady shot control across many small cavities, mould space for an unscrewing or stripper mechanism, and clean colour changes. Pratishna Engineers supplies horizontal injection moulding machines for feeding bottle cap production and can recommend a configuration for your cap set.
Manufacturing Feeding Bottle Caps?
Share your cap drawing or sample, thread type, cavity count and monthly volume, and Pratishna Engineers will suggest a suitable machine.
Machine Requirements for Feeding Bottle Cap Moulding
A cap set is a screw ring and a snap-on hood, with the silicone teat made separately. Points to check when choosing a machine:
- Repeatable small shots across multi-cavity hot runner moulds
- Mould space for unscrewing cores or stripper plate ejection
- Flat teat seating face on the screw ring, free of warpage
- Clarified PP processing for see-through hoods without haze
- Quick colour change between pastel masterbatch shades
- Clamping force matched to the projected area of all cavities
Recommended Machine for Feeding Bottle Caps
Bottle caps are small, so the clamp is sized by cavity count more than by part size. The E Series (75-180 T) covers many screw ring and hood moulds. Higher-cavity hot runner tools, or family moulds running ring and hood together, can move the requirement to the C Series (140-320 T) or H Series (120-350 T).
Not Sure Which Machine You Need?
Send your cap 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
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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 KBBaby Care Components & Machine Guide
A guide to Baby Care components, covering feeding bottles, caps, sippers, teethers, spoons, bath tubs and potties. It explains food-contact materials, clean moulding practice, multi-cavity tools for small parts, mould size for large parts, and how to match each part to a suitable machine.
Download PDFPDF · 223 KB
FAQs / Buyer Questions
Questions cap makers ask before they choose a machine.
Which Injection Moulding Machine Is Used to Make Feeding Bottle Caps?
A horizontal machine at the lower end of the tonnage scale is common. Low-cavity cap moulds often fit the E Series, while high-cavity hot runner moulds may need the C or H Series, depending on mould size.How Is the Internal Thread on the Screw Ring Released?
Shallow, rounded PP threads can often be stripped off the core while the ring is still warm. Deeper or finer threads need an unscrewing mould driven by a motor or rack, which adds mould thickness and needs core pull control.Why Do Screw Rings Warp or Go Oval After Moulding?
Uneven cooling and an off-centre gate can make the ring oval or leave the teat seating face dished. Balanced cooling in core and cavity, enough holding pressure and a steady mould temperature keep the ring flat and round.
Which Materials Suit Clear and Coloured Hoods?
Screw rings and hoods are usually food-grade PP, with clarified PP for see-through hoods. Some snap-on covers use PE or HDPE for a softer fit. A planned purge between masterbatch shades avoids specks after a colour change.Can Pratishna Recommend a Machine for My Feeding Bottle Cap?
Yes. Share the cap drawing or sample, material grade, part weight, thread type, mould size, cavity count and target output, and Pratishna Engineers will recommend a suitable machine.Does the Machine Suit Other Baby Care Parts Too?
Yes. Machines in this class can also mould feeding bottle bodies, snack cups, pacifier shields and milk powder container lids, subject to the mould and material.
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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