温度对模具制作和浇注过程的影响

Urethane Rubbers, Plastics and Foams

• For best results, store and use urethane products at room temperature (72°F / 23°C).
• If material freezes, it can be used after being brought back to room temperature. Thoroughly pre-mix Parts A & B before dispensing.
• Cold – Colder environmental temperatures will increase working time (pot life) and delay cure time of urethane rubbers and plastics. If urethane rubber or urethane plastics that take overnight to cure are applied in too cold of an environment, they may not cure at all.
• Heat – Elevated temperatures will reduce the pot life and cure time of urethane rubbers and plastics.
• Humidity – Urethanes are easily affected and should be used in a low humidity environment. Humidity will react with urethanes and may cause bubbles or foaming in the material.

Silicone Rubber

• For best results, store and use silicone products at room temperature (72°F / 23°C).
• If material freezes, silicone base will become very thick. It can be used after being brought back to room temperature.
• Important: storing silicone in elevated temperatures can significantly reduce the shelf life of unused product.
• Cold (Tin-Cure Silicones) – Colder temperatures do not have as dramatic an effect as they do on other materials. Accelerated silicones can even be used to make molds over frozen models.
• Cold (Platinum-Cure Silicones) – Colder environmental temperatures will increase working time (pot life) and delay cure time of platinum silicones. If applied in too cold of an environment, they may not cure at all.
• Heat (Tin-Cure Silicones) – warmer temperatures do not have as dramatic an effect as they do on other materials. You cannot "heat cure" tin-catalyzed silicones.
• Heat (Platinum-Cure Silicones) – Elevated temperatures will reduce the pot life and cure time of platinum catalyzed silicone rubber. Many mold makers will use heat to accelerate the cure time (demold) of platinum silicone molds.
• Humidity (Tin-Cure Silicones) – Will cure faster in humid environments.
• Humidity (Platinum-Cure Silicones) – Humidity generally does not affect platinum silicones.

Latex mold making rubber, latex foam and acrylic latex polymer products (such as duoMatrix™ and Forton™ systems)

• For best results, store and use latex products at room temperature (72°F / 23°C).
• Important: if latex is allowed to freeze, it is unusable and should be discarded.
• Cold – Any material containing latex is susceptible to cold temperatures. Using latex in cold environments will prolong the evaporation process, especially if humidity is high.
• Heat – higher temperatures will accelerate the cure of latex. If making a mold with latex rubber, higher temperatures in dry conditions (low humidity) will accelerate evaporation of the rubber.
• Humidity – humid environments will slow the evaporation process thereby slowing the cure of latex rubber.

Other Temperature Factors to Consider

Temperature of material in containers

You may be using material in an environment that is at room temperature, but the temperature of material in the containers will dictate how the material behaves. Example, if you store urethane plastic in a hot garage and bring it inside to a 72°F (23°C) environment to use it, the pot life might be half of what you would normally expect.