Injection Moulding Machine for Tiffin and Lunch Boxes
Tiffin and lunch boxes are produced as a set of separate tools on horizontal injection moulding machines, in PP, SAN or copolyester with TPE gaskets. Body, inner containers, lid and latch each need a mould, and the largest body mould sets machine size. Latch stiffness and gasket compression matter most for leaks.
For lunch box sets, machine selection centres on running several small and mid-size tools with matched shrinkage so every part fits. Pratishna Engineers supplies horizontal injection moulding machines for tiffin and lunch box production and can recommend machines for the full set of moulds.
Manufacturing Tiffin Boxes?
Share the parts in your lunch box set, materials and output, and Pratishna Engineers will suggest machines for each tool.
Machine Requirements for Tiffin and Lunch Box Moulding
A lunch box is a set, not a part, and buyers judge it on whether it leaks when dropped or turned over. Points to plan for:
- Latch stiffness designed together with gasket compression
- Lid and rim dimensions held steady across resin lots
- Separate tools for body, inner boxes, lid and latch
- Latch hinge filled without a weld line at the pin
- Food-contact grades of PP, SAN or copolyester
- Even shrinkage so lids from any cavity fit any body
Recommended Machine for Tiffin and Lunch Boxes
Latches, gaskets and small inner containers suit the E Series (75-180 T). Outer bodies, multi-compartment lids and two-cavity body tools need more clamping force and shot, so the C Series (140-320 T) covers them, and the H Series (120-350 T) suits larger sets. A full set is often split across two machine sizes.
Not Sure Which Machine You Need?
List the parts in your set for a machine suggestion per tool.
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 KBHousehold Products Components & Machine Guide
A guide to Household Products components, covering buckets, mugs, tubs, storage boxes, casseroles, hangers, bins, baskets and kitchen containers. It explains PP and HDPE, food-contact use, recycled material, mould height, and how to match each part to a suitable machine.
Download PDFPDF · 204 KB
FAQs / Buyer Questions
What lunch box makers ask when they plan a new set.
Which Injection Moulding Machine Is Used to Make Tiffin and Lunch Boxes?
Usually more than one size. Latches, gaskets and small inner boxes run on the E Series, while outer bodies and multi-compartment lids need the C or H Series. Pratishna Engineers can plan machines across the whole set.Are Steel Inner Containers Part of the Moulding Scope?
No. Stainless steel inner containers are fabricated, not moulded. Injection moulding covers the plastic outer body, lid, latch, gasket and any plastic inner boxes, so list which parts are plastic at enquiry stage.How Is a Lunch Box Tested for Leaks?
Fill the box, close it, then drop and invert it and look for leaks at the lid. Latch stiffness and gasket compression work together, so a soft latch or an out-of-size gasket shows up here first.
Why Does a Latch Crack or Lose Its Snap?
Latches often fail at a weld line near the hinge pin, or from a grade too stiff for repeated flexing. Gate the latch so melt fills the hinge from one side, and test snap force after any material change.Can Pratishna Recommend a Machine for My Lunch Box?
Yes. Share drawings or samples of each part in the set, materials, part weights, mould dimensions, cavity counts and monthly output, and Pratishna Engineers will suggest suitable machines.Does the Machine Suit Other Kitchen Storage Parts Too?
Yes. The same series can mould kitchen containers, thermoware, casseroles and container caps and closures, subject to mould size and cavity count.
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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