Injection Moulding Machine for Terminal Blocks and Connectors
Terminal blocks and connectors are moulded on horizontal injection moulding machines from flame-retardant PA66, PBT or PC, often glass-filled. Number of poles, cavities and the length of strip blocks decide the machine. Thin walls between poles need full fill and tight dimensions, because they set creepage distance and clamp fit.
Terminal block machine choice depends on glass-filled grades, drying and flatness of long multi-pole strips. Pratishna Engineers supplies horizontal injection moulding machines for terminal block production and can recommend a configuration for your block and mould.
Manufacturing Terminal Blocks?
Share pole count, block type, material grade and output plan, and Pratishna Engineers will recommend a machine.
Machine Requirements for Terminal Block Moulding
A terminal block holds metal clamps in pockets separated by thin insulating walls. The machine needs to deliver:
- Bimetallic screw and barrel for glass-filled grades
- Drying of PA66 and PBT before moulding
- Full fill of thin walls between poles
- Straight multi-pole strips with low warpage
- Clean rail clip snaps without stress whitening
- Accurate clamp pockets and screw holes
Recommended Machine for Terminal Blocks and Connectors
Rail-mount blocks, small connectors and short strips mould well on the E Series (75-180 T). Long multi-pole strips, larger power blocks and high cavity counts need more platen area and clamping force, so a C or H Series machine is chosen to suit the mould.
Not Sure Which Machine You Need?
Share your block drawing and grade 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 KBElectrical Building Products Components & Machine Guide
A guide to Electrical Building Products components, covering conduit fittings, junction boxes, modular switches, plug tops, MCB housings, cable glands and terminal blocks. It explains flame-retardant grades, drying, dimensional control, and how to match each part to a suitable machine.
Download PDFPDF · 218 KB
FAQs / Buyer Questions
Machine questions terminal block makers raise most often.
Which Injection Moulding Machine Is Used to Make Terminal Blocks and Connectors?
Most terminal block moulds run on the E Series. Long strips, heavy power blocks or moulds with many cavities are moved up to the C or H Series according to projected area and shot size.Why Do Glass-Filled Terminal Strips Warp?
Glass fibres line up with the flow and shrink less along the fibre than across it. Gate position, even wall thickness and balanced cooling keep long strips straight.Are Brass Clamps Moulded In?
Clamps and screws are usually assembled after moulding into moulded pockets. Blocks with moulded-in brass inserts need insert loading and a mould review before machine selection.
Which Grade Gives Good Tracking Resistance?
Flame-retardant PA66 and PBT grades with a high tracking index are often used for terminal blocks. Grade choice affects drying time and melt temperature, so share it at enquiry.Can Pratishna Recommend a Machine for My Terminal Block?
Yes. Share drawings or samples, pole count, material grade, part weights, mould dimensions, number of cavities and production target, and Pratishna Engineers will recommend a suitable machine.Does the Machine Suit Other Electrical Building Products Too?
Yes. The same machines can mould switch contact carriers, MCB housings, lamp holders and cable glands, subject to mould and grade.
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.
Talk to Our Engineers
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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