Injection Moulding Machine for Flanges and Flange Adaptors
Pipe flanges and flange adaptors are made on horizontal injection moulding machines from UPVC or PP. Flange diameter, hub thickness and shot weight decide the machine, and the largest sizes need high clamping force. Thick sections matter most: the hub and face must be packed well to avoid sink, voids and a face that will not seal.
For flanges, the machine choice comes down to platen size and shot capacity for the biggest flange, plus steady holding pressure through thick walls. Pratishna Engineers supplies horizontal injection moulding machines for flange moulding and can advise on machine size for each diameter.
Moulding Pipe Flanges?
Share flange sizes, drilling pattern, material and quantities with Pratishna Engineers for a machine recommendation.
Machine Requirements for Flange Moulding
Flanges are thick, flat and heavy for their size, and that shapes what the machine must do:
- Shot capacity for heavy hubs and wide flange rings
- Long, steady holding pressure to pack thick sections
- Flat sealing face without sink or ripples
- Bolt hole cores placed to limit weld lines
- Platen size and tie-bar space for large flange moulds
- PVC-suited screw that avoids overheating thick UPVC shots
Recommended Machine for Flanges
Small flange adaptors and stub flanges fit the E Series (75-180 T). Mid-size flanges with heavier hubs suit the C Series (140-320 T), and the larger flanges in the range need the shot weight and platen area of the H Series (120-350 T). Very large flanges may need more clamping force and are checked against the mould on request.
Not Sure Which Machine You Need?
Send your flange sizes and mould drawing 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
What flange makers most often ask before choosing a machine.
Which Injection Moulding Machine Is Used to Make Pipe Flanges?
Horizontal machines sized by flange diameter and shot weight. The E Series covers small adaptors, the C Series mid sizes and the H Series larger flanges. The heaviest flanges are reviewed against the mould for clamping force.Why Do Thick Flange Hubs Show Voids or Sink?
Thick sections shrink as they cool. If holding pressure stops before the gate freezes, the centre of the hub pulls into a void or the face sinks. A larger gate, longer hold time and cored-out hubs reduce this.How Is Clamping Force Worked Out for a Large Flange?
Tonnage follows the projected area of the flange face and runner multiplied by cavity pressure, plus a margin. Wide flat flanges have a large area, so diameter rather than part weight usually sets the clamping force.
Can Flanges Be Moulded in PP as Well as UPVC?
Yes. UPVC flanges match PVC pipe systems, and PP flanges suit chemical and drainage lines. PP shrinks more, so the mould is made for that material. Switching between the two needs a thorough purge.Can Pratishna Recommend a Machine for My Flange?
Yes. Share the flange or adaptor drawing, diameters, drilling, material, part weight, mould dimensions, cavities and required quantity, and Pratishna Engineers will recommend a suitable machine.Does the Machine Suit Other Pipeline Parts Too?
Yes. Plastic valves, pipe fittings, clamp saddles and tank connectors can run on machines in the same range, depending on mould size.
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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