Injection Moulding Machine for Water Tank Fittings
Water tank fittings such as tank nipples, connectors and bulkhead fittings are made on horizontal injection moulding machines from PP copolymer, uPVC, HDPE or glass-filled PA66. Machine size depends on the flange diameter, cavity count and the unscrewing mould that forms the BSP threads. Packing pressure at the thick hex and flange junction controls sink and voids.
For tank fittings, machine selection centres on mould opening for the unscrewing core, steady holding pressure for thick sections and a clean seal face. Pratishna Engineers supplies horizontal injection moulding machines for tank fitting production and can suggest a configuration for your fitting range and mould.
Manufacturing Water Tank Fittings?
Share your fitting sizes, thread type, material and monthly volume, and Pratishna Engineers will suggest a suitable machine.
Machine Requirements for Water Tank Fitting Moulding
Tank fittings combine coarse threads, a thick hex and a sealing face that has to stay flat and clean. A machine for this work should offer:
- Mould space and stroke for unscrewing or collapsing thread cores
- Steady holding pressure to pack the thick hex and flange
- Clamp force on the upper side to keep seal faces flash-free
- PVC-suited screw and barrel when uPVC fittings are run
- Enough shot weight for the largest bulkhead fitting in the range
- Dryer for glass-filled PA66, clean feed for potable-water grades
Recommended Machine for Water Tank Fittings
Tank nipples and small connectors run in multi-cavity moulds that suit the E Series (75-180 T). Larger bulkhead fittings with wide flanges, or moulds carrying several unscrewing cores and their drive, need more platen space and tonnage. The C Series (140-320 T) covers mid-size moulds and the H Series (120-350 T) the largest.
Not Sure Which Machine You Need?
Send your fitting drawing and thread size 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
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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
Questions plumbing fitting makers ask about moulding tank nipples and bulkhead connectors.
Which Injection Moulding Machine Is Used to Make Water Tank Fittings?
A horizontal machine is used. Smaller nipples and connectors usually fit the E Series, while big bulkhead fittings and moulds with several unscrewing cores move to the C or H Series, depending on flange size and cavities.Why Do Tank Fittings Need an Unscrewing Mould?
Male and female BSP threads cannot be stripped off a fixed core without damage. An unscrewing or collapsible core releases the thread cleanly, so the mould is taller and needs more opening stroke and room for the core drive.How Do You Stop Sink Marks on the Hex and Flange?
Gate into or near the thick section, hold pressure until the gate freezes, and core out the hex where the design allows. Sink at the washer face can open a leak path once the fitting is tightened.
Which Material Suits Potable Water Tank Fittings?
PP copolymer and HDPE suit most tank fittings, uPVC suits fittings joined to PVC pipe, and glass-filled PA66 gives a stiffer thread. Use a compound approved for contact with drinking water.Can Pratishna Recommend a Machine for My Water Tank Fitting?
Yes. Share the fitting drawing or sample, thread sizes, material, part weight, mould size, number of cavities and the core type, and Pratishna Engineers will recommend a machine.Does the Machine Suit Other Sanitary Fittings Too?
Yes. Similar machines can mould plastic taps, bib cocks, angle cocks, waste couplings and floor drain bodies, subject to each 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?
Share your component, material, mould and production target. Our engineering team will help you identify the right machine configuration.
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