Silicone Gasket Injection Mold

Mold Information

Mold Design Key Features

Four-Cavity Balanced Layout

The cavities are arranged symmetrically around a single central sprue gate via a balanced cold runner system. This design ensures balanced filling, uniform packing pressure, and consistent part quality and weight across all four cavities.

High-Polish Cavity Surfaces

The core and cavity for molding the gasket are manufactured from S316 stainless steel and polished to a high-gloss finish (e.g., SPI A-1/A-2). This is critical for facilitating the clean release of the flexible silicone, minimizing sticking, and producing a smooth, flash-free part surface as seen in Image 2.​

Optimized Ejection for Flexible Parts

Ejector pins are carefully positioned on non-critical areas of the gasket (likely on the thicker sections or mounting pads) to push the part out without causing bending, tearing, or permanent deformation of the thin living hinges and flexible fingers.

Integrated Part Identification & Cooling

The mold includes clear cavity identification numbers (e.g., 171, 172) and related markings (IN3-IN12). The "IN" markings strongly suggest integrated temperature control points, indicating the mold has dedicated cooling/heating channels numbered for precise zonal temperature control, which is vital for silicone curing.​

FAQs

Q1: Why is S316 Stainless Steel used for the core/cavity instead of standard tool steel?

A:​ S316 stainless steel is chosen primarily for its exceptional corrosion resistance. Silicone materials, especially during curing, can release by-products that may corrode standard tool steels over time. S316 ensures a longer, maintenance-free mold life and preserves the high-polish finish necessary for easy part release and superior surface quality on the final gasket.

Q2: What are the advantages of a 4-cavity design with a single cold sprue?