This is a high-efficiency, food-grade certified 1×4 cavity PP hot runner injection mold specially designed for mass production of plastic container lids, cup lids and food packaging closure parts. Built with premium 1.2083 stainless steel heat-treated to HRC48-52 and finished with high-precision mirror polishing, this mold fully meets food safety molding standards. Equipped with a hot runner system, it delivers zero waste material, stable filling, ultra-smooth surface and long mold lifespan for high-volume food container lid manufacturing.
Mold Technical Specifications
| Item | Specification |
| Mold Cavity | 1×4 high balanced cavity design |
| Runner System | Hot runner system, no cold runner waste |
| Molding Material | PP (Food Grade Polypropylene) |
| Cavity & Core Steel | 1.2083 stainless mold steel |
| Steel Hardness | HRC 48–52 (vacuum heat treatment) |
| Surface Finish | High standard polished mirror finish |
| Application | Food container lids, cup lids, storage box covers, food packaging closures |
| Feature | Food grade standard, high smoothness, no burrs, tight sealing |
Core Product Advantages
1. 1×4 Balanced Cavity High Production Efficiency
The 1-out-of-4 symmetrical cavity layout ensures completely balanced melt flow, filling speed and cooling effect for every lid. All four lids come out with identical size, weight and flatness. It greatly improves output, reduces unit production cost and fully supports large-scale mass production of daily food packaging lids.
2. Hot Runner System for Food-Grade Clean Production
Adopting a full hot runner structure, there is no cold runner material waste, no secondary cutting pollution, and no residual plastic particles. It keeps the production environment clean and fully adapts to food-grade plastic molding requirements. Meanwhile, it shortens the molding cycle, stabilizes injection pressure, and effectively avoids PP lid warpage, shrinkage and uneven wall thickness.
3. 1.2083 Stainless Steel — Best Choice for Food Mold
1.2083 is professional anti-rust stainless mold steel specially used for food and medical molds. After vacuum heat treatment to HRC48-52 high hardness, the mold surface is extremely dense, corrosion-resistant, oxidation-resistant and easy to clean. It will not produce mold stains, rust spots or material precipitation during long-term production, ensuring food-grade hygiene safety for plastic lids.
4. High Polished Mirror Surface for Flawless Lid Appearance
The cavity and core are finely polished to mirror finish, making the PP lid surface super smooth, transparent, glossy, and free of flow lines, water marks and orange peel texture. The smooth mold surface also ensures no burrs on the lid sealing edge, providing perfect tight-fitting performance for food container sealing.
5. Professional Optimization for PP Lid Molding
PP material is lightweight, food-safe and flexible, but easy to shrink and warp. This mold is specially optimized with uniform cooling system and reasonable venting structure, which effectively solves common PP molding defects such as sink marks, warpage, poor flatness and sealing gaps. The produced lids have precise roundness, flat surface and excellent sealing performance.
Application Scope
This food-grade PP lid mold is widely used for producing all kinds of daily food packaging plastic lids, including water cup lids, fresh-keeping box lids, snack container lids, beverage closures, takeaway box lids and other food-safe plastic cover parts.
Conclusion
This 1×4 cavity hot runner food-grade lid mold adopts 1.2083 high-hardness stainless steel and high-precision polishing technology. It features high efficiency, food safety, stable quality, beautiful surface and long service life. It is the most ideal customized mold solution for mass production of high-standard PP food container lids.
