Injection Moulding Machine for Petri Dishes
Petri dishes are made on horizontal injection moulding machines from general-purpose polystyrene, or PP where the dish must be autoclaved, usually with base and lid in multi-cavity moulds. Base projected area and cavity count decide clamping force. A flat, clear base without warpage or flow marks matters most, since the plate is read through it.
Machine selection for petri dishes focuses on fast filling of thin, flat walls, even cooling across the base and tight control of the stacking ring so lids sit level. Pratishna Engineers supplies horizontal injection moulding machines for petri dish moulding and can recommend a configuration for your dish and mould.
Manufacturing Petri Dishes?
Share your dish size, resin, base and lid cavity layout and output target, and Pratishna Engineers will recommend a machine.
Machine Requirements for Petri Dish Moulding
A petri dish is a thin, clear, flat part that must stack and vent correctly, which shapes the machine choice:
- Fast injection to fill thin flat walls without flow lines
- Even mould cooling to keep the base flat
- Stacking ring and vent rib tolerance held shot to shot
- Polished cavities and clean PS handling for clear parts
- Clamping force for the full base and lid projected area
- Resin choice that survives the planned sterilisation method
Recommended Machine for Petri Dishes
Dishes are light, but each flat base adds a large projected area, and cavity count multiplies it. Lower-cavity base and lid tools can suit E Series (75-180 T) or Hybrid PH Series (120-140 T) machines. Higher-cavity tools and stack moulds usually need clamp and opening stroke from H Series (120-350 T) or C Series machines.
Not Sure Which Machine You Need?
Share your dish and lid tool layout to get 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 KBMedical Sector Components & Machine Guide
A guide to Medical Sector components, covering syringes, IV set parts, luer fittings, connectors, pipette tips, petri dishes, test cassettes and device housings. It explains medical-grade materials, clean moulding area needs, dimensional control, and how to match each part to a suitable machine.
Download PDFPDF · 206 KB
FAQs / Buyer Questions
Common questions from petri dish and lab plastics makers.
Which Injection Moulding Machine Is Used to Make Petri Dishes?
A horizontal machine sized by base area multiplied by cavity count. Hybrid PH and E Series machines suit smaller tools, while higher-cavity and stack moulds generally move to the H or C Series.Should Petri Dishes Be Made in PS or PP?
General-purpose PS is standard for single-use culture dishes because it is clear and stiff. PP is chosen where the dish must survive autoclaving, though it is less clear. Gamma or EtO sterilisation after moulding also limits which grades suit.Why Do Petri Dish Lids Rock on the Base?
Warpage in the base or variation in the stacking ring and vent ribs stops the lid sitting level. Uneven mould cooling, an off-centre gate and inconsistent holding pressure are the common causes.
Can Bases and Lids Run in the Same Mould?
Yes, as a family mould, though the two parts fill and shrink differently and need balanced runners. Some plants run separate base and lid tools or stack moulds, which need extra opening stroke and mould height.Can Pratishna Recommend a Machine for My Petri Dish?
Yes. Share the dish drawing, resin grade, base and lid cavity counts, mould type and dimensions, sterilisation method and target output, and Pratishna Engineers will recommend a suitable machine.Does the Machine Suit Other Laboratory and Diagnostic Parts Too?
Yes, subject to the mould. Laboratory and diagnostic trays, 96-well microplates, specimen containers and test kit housings can run on comparable machines once each tool is sized.
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?
Share your component, material, mould and production target. Our engineering team will help you identify the right machine configuration.
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