Silicone Half-Mask Respirator Injection Mold

The silicone half-mask respirator mold is designed for overmolding medical-grade LSR onto a PA insert (Nylon facepiece base), ensuring superior sealing performance and comfort for industrial, medical, and personal protective applications. It can be customized with 2 to 4 cavities and adopts a cold runner system to minimize material waste while achieving high precision molding. Each mold is engineered for a service life of over one million shots, depending on maintenance, and supports various surface finishes including polished, matte, or textured to meet client preferences. 
To support high-volume production, the mold can be paired with a fully automatic vertical injection moulding machine, enabling stable, repeatable, and efficient LSR overmolding.

Silicone half mask respirators are widely used in industries requiring high levels of safety and comfort. They combine a soft, skin-friendly LSR sealing layer with a rigid thermoplastic PA insert framework to create a mask that is durable, reusable, and easy to clean. Leveraging the biocompatibility, heat resistance, and flexibility of LSR, these masks remain comfortable and maintain their performance in a wide range of temperatures, from –50 °C to +250 °C.
TYM’s mold solutions enable precise overmolding of LSR onto thermoplastic substrates, forming a seamless facial interface that ensures an airtight fit and long-term wearability. The final product is compatible with various filter cartridges, making it versatile for both industrial and healthcare environments. Combined with a fully automaticvertical injection moulding machine, our molds ensure consistent quality and efficiency in producing silicone half mask respirators.


Mold Information

Mold Design & Key Technology

Advanced Overmolding and Insert Molding
State-of-the-art techniques are applied to bond LSR seamlessly to rigid substrates, creating strong mechanical and chemical adhesion between the two materials.

Cold Runner System for Material Efficiency
The cold runner system keeps the LSR material at an optimal temperature until injection, reducing waste, ensuring precise filling, and improving part quality.

Precision Engineering for Dimensional Accuracy
Mold structures are designed with allowances for thermal expansion and shrinkage, and optimized venting and gating systems guarantee defect-free molding.

High-Accuracy Manufacturing Processes
Utilizing high-precision CNC and EDM machining ensures tight tolerances, which is essential for consistent sealing performance in silicone half mask respirators.

Medical-Grade Material Selection
Only certified medical-grade LSR is used, providing durability, resistance to sterilization, and hypoallergenic properties, ensuring compliance with stringent safety standards.

FAQs

Q1: Can this mold support multi-material overmolding?
Yes. The mold can perform multi-component or insert molding, combining LSR with thermoplastics, metals, or other materials to create masks with integrated rigid structures or functional parts in a single process.

Q2: Why is LSR ideal for respirator masks?
LSR is soft, hypoallergenic, odorless, tear-resistant, and retains flexibility across extreme temperatures. It supports high-temperature sterilization and offers excellent facial fit, making it the preferred choice for protective mask applications.

Q3: How do you ensure mold reliability and product consistency?
We employ cold runner designs, precision thermal control, and simulation-based mold optimization. Together with high-quality tool steel and strict quality inspection, these measures ensure consistent product performance over large production volumes.