Liquid silicone rubber is a highly flowable elastomer with extremely low viscosity compared to thermoplastics. This characteristic allows it to fill complex cavities easily, but it also introduces challenges such as flash formation, air entrapment, and unpredictable flow front behavior.

May 11th, 2026

Mold Flow Analysis and Design: Reducing Manufacturing Risks Before Production Begins

Modern injection molding industries increasingly require higher precision, shorter development cycles, and lower production risks. For silicone molds and plastic injection molds, even small design errors may lead to flashing, short shots, warpage, weld lines, air entrapment, or dimensional instability.

May 5th, 2026

What Are the Challenges in Multi-Cavity Mold Design?

Multi-cavity mold design is widely used in injection molding to improve production efficiency and reduce unit cost. By producing multiple identical parts in a single cycle, manufacturers can significantly increase output and achieve economies of scale.

April 28th, 2026

What Surface Finishes Can Be Achieved with LSR Molds?

Common finishes range from SPI A-1 (mirror polish) to SPI D-3 (brushed texture). Polished finishes produce glossy LSR parts with excellent clarity for optical applications.

April 28th, 2026

How to Improve Demolding Efficiency for LSR Parts?

Appropriate draft angles, typically 1° to 3°, allow parts to release smoothly from vertical walls. Undercut management through side-actions or collapsible cores eliminates mechanical interference.

April 28th, 2026

What Is Flash in LSR Molding and How to Prevent It?

Flash occurs when LSR leaks out of the mold cavity at parting lines or ejector pins due to excessive injection pressure or insufficient clamping force. Microscopic gaps from worn mold components or improper alignment also contribute.

April 28th, 2026

How to Ensure Dimensional Stability in LSR Molding?

LSR's high coefficient of thermal expansion means parts shrink significantly during cooling. Mold temperature uniformity is crucial to prevent differential shrinkage that causes warpage.

April 28th, 2026

What Are the Challenges in LSR Mold Trial?

Flash formation, incomplete fills, and dimensional variations are frequent issues during first runs. Material degradation from overheating or improper mixing can occur.

April 28th, 2026

How to Mold Complex Geometries with LSR?

Thin walls, deep cavities, and intricate undercuts pose filling and ejection challenges due to LSR's low viscosity and high thermal expansion. Air entrapment becomes more likely in complex geometries.

April 28th, 2026

What Is LSR Overmolding and How Does It Work?

LSR overmolding involves injecting liquid silicone rubber over a pre-formed substrate, such as plastic or metal. The process creates a strong bond between materials without adhesives.