Injection Moulding Machine for Pipe End Caps and Leg Glides
Pipe end caps for furniture tubes and legs are made on horizontal injection moulding machines, in multi-cavity moulds, from LDPE, PP, PVC or TPE. Cap size and cavity count decide machine size. Fit on the tube is the critical point, since shrinkage shifts the interference dimension from one setting to the next.
Selection for end caps and glides is about filling thin skirts fully and holding a steady cap size from shot to shot. Pratishna Engineers supplies horizontal injection moulding machines for tube end cap production and can suggest a set-up for your tube sizes and moulds.
Moulding Pipe End Caps?
Share your tube sizes, wall gauge, cap material and quantities, and Pratishna Engineers will recommend a machine for your end cap moulds.
Machine Requirements for Pipe End Cap Moulding
An end cap is judged by how it grips the tube and whether it splits when pressed on. Machine points to check:
- Steady holding pressure for a repeatable interference fit
- Full fill of thin skirts and gripping fins
- PVC-suited screw and barrel where PVC caps are run
- Ejection off deep cores without stretching soft LDPE caps
- Mould space for family tools covering several tube sizes
- Recess for felt or TPE glide pads fitted afterwards
Recommended Machine for Pipe End Caps
End caps and leg glides are small to medium parts, so the E Series (75-180 T) suits many single-size and multi-cavity moulds. Family tools for several tube sizes, larger leg caps or high-cavity hot runner moulds can run on the H Series (120-350 T), where the wider platen takes the bigger mould.
Not Sure Which Machine You Need?
Tell us your tube sizes and cap material for a machine suggestion.
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 KBFurniture & Hardware Components & Machine Guide
A guide to Furniture & Hardware components, covering chairs, stools, tables, drawers, storage, hinges, drawer channels, knobs, castors and fittings. It explains large-part moulding, mould height, POM and nylon hardware, and how to match each part to a suitable machine.
Download PDFPDF · 203 KB
FAQs / Buyer Questions
Common questions from makers of tube furniture, racks and chairs.
Which Injection Moulding Machine Is Used to Make Pipe End Caps?
Single-size end cap moulds often sit on an E Series machine. Square and rectangular tube caps in several sizes, or larger glide caps, may need an H Series machine. Projected area of all cavities sets the final tonnage.Why Does an End Cap Split When Pressed Onto the Tube?
A split usually starts at a thin skirt that filled or packed poorly, or at a weld line opposite the gate. Better venting, a gate moved toward the skirt or more holding pressure can fix it. A brittle grade also adds to the problem.How Is the Fit Kept Right for Different Tube Tolerances?
Interference depends on cap size after shrinkage and on the tube’s own outside or inside diameter. Measure tubes from your supplier, size the mould to match, then hold mould temperature and holding pressure steady so the cap does not drift.
Can a Felt or TPE Glide Pad Be Added to the Cap?
Felt pads are glued or pressed in after moulding. A TPE pad can be assembled, or moulded on, but moulding a soft pad onto a rigid cap is a two-material process that needs a machine built to the application.Can Pratishna Recommend a Machine for My Pipe End Cap?
Yes. Send the tube sizes and gauge, cap drawing or sample, material, part weight, cavities per mould and monthly volume, and Pratishna Engineers will recommend a machine.Does the Machine Suit Other Tube Furniture Parts Too?
Yes. Furniture leg feet, fastener caps, caster housings and anchor fasteners can run on the same class of machine, depending on the mould size and shot.
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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