Injection Moulding Machine for Bib Cocks
Bib cocks are moulded on horizontal injection moulding machines, usually from PTMT, with POM or glass-filled PA66 used for spindles and some bodies. The longest body variant, its projected area and the cavity count set the machine size. PTMT must be dried before every run, because moisture causes hydrolysis and permanently cuts strength.
Bib cock machine selection looks at the full product family, from short body to long body, and at thread core control. Pratishna Engineers supplies horizontal injection moulding machines suited to bib cock work and can advise on a configuration that covers your whole range.
Manufacturing Bib Cocks?
Share your body variants, inlet thread, material and monthly volume, and Pratishna Engineers will recommend a suitable machine.
Machine Requirements for Bib Cock Moulding
Bib cock moulding is mostly PTMT work with a threaded inlet and a working spindle seat. The machine should provide:
- Dehumidifying dryer capacity matched to PTMT throughput
- Shot weight and platen size for the longest body variant
- Concentric unscrewing core control for the BSP inlet thread
- Barrel temperature control for PTMT, POM and glass-filled PA66
- Wear-resistant screw where glass-filled PA66 bodies are run
- Short runner or hot runner layout to limit PTMT regrind
Recommended Machine for Bib Cocks
Short body bib cocks and their spindles fit the E Series (75-180 T) in multi-cavity tools. Size the machine on the longest variant in the family: long body and extended-reach bib cocks may need the C Series (140-320 T), and the H Series (120-350 T) suits larger family moulds.
Not Sure Which Machine You Need?
Send your longest bib cock variant and mould details for a sizing check.
Why Choose Pratishna Engineers?
- Application-Based Machine Selection
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- Multiple Machine Series
- Production-Focused Solutions
- End-to-End Technical Support
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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 KBSanitary & Bathroom Fittings Components & Machine Guide
A guide to Sanitary & Bathroom Fittings components, covering taps, bib cocks, angle cocks, health faucets, showers, cistern fittings, traps and drains. It explains PTMT, POM, ABS and UPVC, leak-free threads and seats, and how to match each part to a suitable machine.
Download PDFPDF · 203 KB
FAQs / Buyer Questions
Answers to questions sanitaryware makers raise about bib cock moulding.
Which Injection Moulding Machine Is Used to Make Bib Cocks?
A horizontal machine sized on the biggest body in the family. E Series machines cover short body cocks and spindles, while long body variants and multi-cavity body moulds can move into the C or H Series.Why Must PTMT Be Dried Before Moulding?
PTMT is a polyester. Moulded wet, it hydrolyses in the barrel and loses strength that cannot be recovered, even when the part looks fine. Dry it in a dehumidifying dryer and keep the hopper covered.Can PTMT Runners and Rejects Be Reground?
Only with care. PTMT regrind loses properties each time it is processed and has to be dried again, so limit the share used and keep runners short. Plan the runner design around this from the start.
How Is the Inlet Thread Kept Concentric?
An unscrewing or collapsible core forms the BSP thread. Core alignment, steady mould temperature and even packing keep the thread concentric with the body bore, so the cock sits square on the wall fitting.Can Pratishna Recommend a Machine for My Bib Cock?
Yes. Share drawings or samples of each body variant, material, part weight, mould dimensions, cavities and target output, and Pratishna Engineers will recommend a suitable machine.Does the Machine Suit Other Tap and Cock Parts Too?
Yes. Similar machines run plastic taps, angle cocks, health faucet triggers, overhead shower parts and cistern valves, subject to the 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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