Plastic Food Storage Container Mould
SINOMOULD has over 20 years of experience in the daily plastic consumables industry, specializing in the development and manufacturing of plastic food storage container moulds and sealed plastic food storage container moulds. We provide stable, precise, and production-ready mould solutions for daily plastic products manufacturers worldwide, adapting to the production needs of plastic food storage container products for various scenarios such as household food storage, commercial catering fresh-keeping, and refrigerator cold storage.
For plastic food storage container products with different capacities, specifications and sealing structures, SINOMOULD offers not only standalone box body moulds or lid moulds, but also combined mould solutions capable of producing both food storage container bodies and sealed lids within a single mould, according to the customer’s production strategy. This approach ensures precise sealing fit between lids and bodies while improving production efficiency and reducing overall investment.
In addition, SINOMOULD supplies fully automated plastic food storage container production line solutions. By integrating robotic take-out systems after injection moulding, products are handled without manual contact, significantly enhancing cleanliness and moulding consistency in the production of food storage containers—especially suitable for applications with high requirements for food contact safety and product standardization.
Standard Plastic Food Storage Container Mould Details
Plastic Food Storage Container Below are examples of the most common parameters for moulds.
| Plastic Food Storage Container Mould Cavity Steel | S136 | Recommended Injection Machine | DKM Servo Energy-Saving Injection Moulding Machine |
|---|---|---|---|
| Plastic Food Storage Container Mould Core Steel | S136 | Plastic Material | PP/PE |
| Mould Base Standard / Steel | P20 Steel | Ejection System | Stripper plate + ejector pin composite ejection |
| Sliders, Inserts, Lifters Steel | High-strength tool steel with surface nitriding treatment | Injection Process | High-speed precision injection, short cycle time, constant temperature control |
| Number of Cavities | 1-4 cavities | Injection Cycle Time | 20 seconds |
| Hot Runner System | valve gate hot runner system | Mould Manufacturing Lead Time | 45-60 |
Key Quality Points of Plastic Food Storage Container Moulds
- Dimensional Accuracy and Sealing Adaptability
Precisely control the dimensional tolerance and flatness of the food storage container mouth and the lid sealing groove, and accurately grasp the moulding precision of the sealing rubber ring slot to ensure that the lid and the container body are tightly buckled and sealed without air leakage, ensuring the food fresh-keeping effect.
- Food-Grade Surface Quality and Finish
The mould cavity adopts mirror polishing process (Ra≤0.2μm), eliminating defects such as weld lines, flow marks, shrink marks and burrs, ensuring that the inner surface of the food storage container is smooth and easy to clean without sanitary dead corners, complying with the safety standards for plastic products in contact with food.
- Multi-Cavity Balance and Weight Consistency
Optimize the layout of hot runner and gate to realize synchronous and precise filling of multiple cavities, ensuring that each food storage container produced in the same mould has highly consistent dimensions, weight and wall thickness, and the lid and container body can be arbitrarily interchanged and matched, suitable for large-scale continuous production.
- Long-Term Wear and Corrosion Resistance
The mould cavity and the moulding part of the sealing structure are made of food-grade corrosion-resistant mould steel, and the key moving parts are subjected to surface hardening treatment, which ensures the long-term stable operation of the mould under high-frequency and mass production, and can resist the corrosion of food soup and cleaning agent.
Machining Highlights for Plastic Food Storage Container Moulds
Plastic food storage container moulds are thin-wall, precision, food-grade plastic moulds. The machining accuracy of the sealing structure and the container mouth directly determines the fresh-keeping performance and use experience of the finished product, and its moulding quality must also meet the food contact safety requirements. SINO MOULD focuses on the following key machining aspects:
- Precision Machining Control of Sealing Structure
For key structures such as the lid sealing groove and the container body sealing lip, high-precision WEDM-LS and EDM are adopted for machining, with the dimensional tolerance controlled within 0.01mm, to ensure that the sealing rubber ring is precisely matched with the slot, and the sealing performance is stable after buckling.
- Dimensional Stability Control of Thin-Wall Cavity
Through optimizing the machining sequence and stress relief treatment, the wall thickness uniformity of the thin-wall cavity of the food storage container is ensured, avoiding warpage and deformation of the container body after moulding, and ensuring the flatness and storage convenience during stacking.
- Consistency and Cleanliness of Mirror Polishing
Unify the mirror polishing standard of the cavity, use food-grade polishing consumables to avoid polishing residues and surface scratches, ensure the consistent finish of the inner and outer surfaces of the food storage container, meet food hygiene requirements and be easy to clean.
- Precise Fit of Mould Assembly
Assemble the mould parting surface, sliders and inserts with high precision to ensure smooth opening and closing and tight fit, eliminate flash and material overflow problems, avoid finished burrs caused by mould gaps, and ensure food contact safety.
Mould Flow Analysis for Plastic Food Storage Container Moulds
