Customized liquid silicone rubber for complex resin mold making and mold duplication. 20A free sample production.

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In the resin mold replication process, liquid silicone rubber is one of the core materials for making molds. It possesses excellent elasticity, replication accuracy, and demolding performance, enabling efficient batch or small-batch replication of complex resin products (such as figurines, handicrafts, industrial parts, etc.). The following provides a detailed introduction from aspects such as characteristics, types, usage process, and selection points:

1. Core characteristics of liquid silicone rubber used in resin mold replication

Liquid silicone rubber (LSR) is a two-component (A/B formulation) material composed of base rubber (containing silicone oil, silica, etc.) and crosslinking agents, catalysts, etc. After curing, it forms an elastic mold. The core reason why it is suitable for resin mold replication lies in:

High replication accuracy: Excellent fluidity (down to 500 mPa·s), capable of penetrating the fine textures on the surface of the prototype (such as patterns and inscriptions below 0.1mm), and completely replicating details after curing, especially suitable for complex shapes (such as hollowing, uneven textures, multi-surface structures).

Excellent demolding performance: After curing, the surface is smooth, has low compatibility with resins (epoxy resin, PU resin, unsaturated resin, etc.), and can be easily demolded without frequent use of demolding agents, reducing damage to the product surface.

Chemical resistance compatibility: Has good corrosion resistance to most resins (especially neutral resins),due to the curing agent and solvent in the resin， prolonging the mold life.

Balance of elasticity and toughness：  after curing is usually in the range of 10-60A (customizable)， with adjustable softness and hardness — soft silicone rubber (10-30A) is suitable for thin-walled， easily deformed products for demolding； hard silicone rubber (40-60A) is suitable for large parts， high-hardness resins (such as epoxy resin)， enhancing mold durability.

Operational convenience： After mixing the two components， it can be molded by pouring， brushing， spraying， etc.， without the need for high-temperature and high-pressure equipment. It can cure at room temperature (around 25℃) without heating to accelerate the process， with a short production cycle (usually 4-24 hours for curing).