Products

Details

This precision insert overmolding mold is engineered for high-volume production of soft skin-like silicone half face masks with rigid PA insert structures. Designed specifically for liquid injection molding (LIM) of medical-grade liquid silicone rubber (LSR), the mold utilizes a cold runner system and vertical injection technology to ensure excellent dimensional accuracy, material efficiency, and consistent product quality. Optimized for use with a 12V system, the mold supports stable, high-cycle production suitable for industrial, medical, and personal protective mask applications.

Mold Information

Mold core material: S136

Mold base material: P20

Number of cavity: Customizable (2-4 cavities)

Runner system: Cold Runner

Number of cold nozzle: 1

Product name: LSR Overmold Prosthetic Leg Sleeve Mold

Machine used: W5555

Description

The silicone half face mask mold produces durable, reusable masks that combine a flexible LSR seal layer with a rigid nylon (PA) framework. The overmolding process ensures strong adhesion between materials, resulting in a seamless facial interface that maintains airtightness and long-term wearing comfort. Compatible with filter cartridges, masks made with this mold are ideal for demanding environments in healthcare, industrial safety, and high-temperature applications, with stable performance across temperatures ranging from –50 °C to +250 °C.

Mold Design & Technology

Advanced Insert Overmolding Design

Ensures precise bonding of soft LSR to rigid PA substrates, creating a secure mechanical and chemical bond in a single molding cycle.

Cold Runner System for Minimal Waste

Keeps LSR at optimal injection temperature, reducing material loss, improving filling consistency, and lowering production costs.

Multi-Cavity Layout for Scalable Output

Supports 2 to 4 cavities based on production needs, enabling flexible volume scaling without compromising precision.

High-Precision Temperature & Vent Control

Engineered cooling channels and venting design prevent defects, shorten cycle time, and enhance surface finish consistency.

Medical-Grade Material Compatibility

Optimized for certified medical LSR, ensuring biocompatibility, sterilization resistance, and compliance with safety standards.

Vertical Mold Structure for Automation

Compatible with fully automatic vertical injection machines, enabling unmanned production, stable quality, and high efficiency.

FAQ

Q1: What is the main application of masks produced with this mold?

A: They are widely used in medical, industrial, and personal respiratory protection where sealing performance, comfort, and reusability are required.

Q2: What material combination does this mold support?

A: It is designed for overmolding medical-grade LSR onto PA (nylon) inserts, combining flexibility with structural support.

Q3: Can the number of cavities be customized?

A: Yes. The mold can be designed with 2, 4, or other cavity configurations based on production volume requirements.