Injection Moulding Machine for Storage Boxes with Lids
Plastic storage boxes and their lids are moulded in separate tools on horizontal injection moulding machines, using PP copolymer or HDPE. The box footprint and depth set clamping force and opening stroke. Box and lid have to shrink by the same amount, or the lid will not seal and the boxes will not stack.
For storage boxes, machine selection covers two tools: a deep box mould and a wide, flat lid mould. Pratishna Engineers supplies horizontal injection moulding machines for storage box production and can recommend a configuration for both moulds.
Manufacturing Storage Boxes?
Share the box and lid drawings, material and mould sizes, and Pratishna Engineers will recommend a machine for each tool.
Machine Requirements for Storage Box Moulding
Storage boxes are sold on fit and stacking strength, so the machine and process have to hold these points:
- Daylight and opening stroke for a deep box body
- Clamping force for the full lid area
- Repeatable holding pressure so box and lid shrink alike
- Ribbed lids cooled evenly to resist warpage
- Impact copolymer PP that does not crack at corners
- Stacking lugs and clip features filled completely
Recommended Machine for Storage Boxes
Small and mid-size boxes and their lids often run on the C Series (140-320 T). Deeper boxes and wider lids move to the H Series (120-350 T), which gives more opening stroke and platen area. Large under-bed and wardrobe boxes may need higher clamping force, and those are reviewed on request with the mould details.
Not Sure Which Machine You Need?
Share your box and lid tool sizes 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 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
Questions storage box makers bring up when planning machines.
Which Injection Moulding Machine Is Used to Make Storage Boxes?
Pratishna Engineers sizes the box and the lid separately. Smaller sets suit the C Series, deeper boxes and wide lids suit the H Series, and very large boxes are discussed on request.Why Does a Storage Box Lid Not Fit After Moulding?
The box and lid were usually moulded under different conditions or with different resin or masterbatch. Running both on one material, with steady holding pressure and mould temperature, keeps their shrinkage in step.How Do You Stop Long Lids from Warping?
Add ribs instead of thickening the lid, place gates so the lid fills evenly, and balance cooling across both mould halves. A thicker lid takes longer to cool and tends to warp more.
Why Do Storage Box Corners Crack in Cold Weather?
Homopolymer PP turns brittle at low temperature. Impact copolymer PP and generous corner radii handle drops and stacking loads better, which matters for boxes stored in cold rooms or shipped in winter.Can Pratishna Recommend a Machine for My Storage Box?
Yes. Share the box and lid drawings or samples, material, part weights, mould dimensions and heights, and monthly quantity, and Pratishna Engineers will recommend a suitable machine.Does the Machine Suit Other Household Storage Products Too?
Yes. The same class of machine can mould kitchen containers, tiffin boxes, fruit and vegetable baskets and cutlery tray and drawer organiser parts, subject to the 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.
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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