Injection Moulding Machine for Tank Connectors and Tank Nipples
Tank connectors and tank nipples are made on horizontal injection moulding machines from PP or UPVC, as a threaded body and a backnut sealed with rubber washers. Connector size, thread length and the backnut mould decide the machine. The flange face matters most, because the washer seals against it and any flash or sink there can leak.
Selection for tank connectors weighs the long threaded body, the backnut unscrewing mould and a flat flange face. Pratishna Engineers supplies horizontal injection moulding machines for tank connector moulding and can work out a configuration for your sizes.
Manufacturing Tank Connectors?
Send your connector sizes, thread type, material and output needs, and Pratishna Engineers will recommend a machine.
Machine Requirements for Tank Connector Moulding
A tank connector seals through a tank wall, so thread and flange quality come first. Look at:
- Slides for long external threads on the body
- Unscrewing cores for internal backnut threads
- Flat flange face free of flash and sink
- Clean parting line across the thread to stop leaks
- Opening stroke for long connector bodies
- Screw and barrel suited to PP or UPVC
Recommended Machine for Tank Connectors
Small tank nipples and their backnuts run well on the E Series (75-180 T). Larger connectors for big tank outlets have longer bodies and heavier flanges, so mould height and shot weight move them to C Series (140-320 T) machines, and to H Series (120-350 T) machines for the biggest outlets. Bodies and backnuts are often run as separate moulds on different machine sizes.
Not Sure Which Machine You Need?
Share your connector and backnut details 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 KBPVC Pipes & Fittings Components & Machine Guide
A guide to PVC Pipes & Fittings components, covering elbows, tees, couplers, valves, end caps, saddles and threaded adaptors. It explains PVC-suited screw and barrel, core pulls and unscrewing moulds, sizing by pipe diameter, and how to match each part to a suitable machine.
Download PDFPDF · 218 KB
FAQs / Buyer Questions
Answers to the questions tank fitting makers raise most.
Which Injection Moulding Machine Is Used to Make Tank Connectors?
A horizontal machine sized by connector diameter and body length. Smaller nipples sit in the E Series. Large outlets with long threaded bodies need the mould space and shot capacity of the C or H Series.How Is the Long Thread on a Tank Connector Moulded?
An external thread along the body is usually formed by two slides that open sideways, so the part ejects without turning. Slide faces must match well, or a ridge across the thread can cut the washer or let water through.Does Sink on the Flange Affect Sealing?
Yes. The washer seals on the flange face, and a sink or ripple there can leak under tank pressure. Even flange thickness, cooling near the face and enough holding pressure keep it flat.
Which Material Suits Tank Connectors?
PP suits most water tank connectors and backnuts, with UV stabilised grades for rooftop tanks. UPVC connectors suit PVC pipe lines and can take a solvent-weld socket at the outlet. Rubber washers are separate parts.Can Pratishna Recommend a Machine for My Tank Connector?
Yes. Share the connector and backnut drawings, sizes, thread type, material, part weights, mould dimensions, cavities and monthly volume, and Pratishna Engineers will recommend a suitable machine.Does the Machine Suit Other Water Line Fittings Too?
Usually, yes. Threaded adaptors, compression fittings, foot valves and flange adaptors can be moulded 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.
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Planning a New Injection Moulding Project?
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