As a commonly used lagging material, liquid silicone is widely used in industrial production. However, sometimes after the liquid silicone rubber is molded, it will be difficult to release the mold, which brings some trouble to the production process. In this article, we'll introduce a simple yet effective way to help solve the problem of difficult mold release after LSR lagging molding.
First of all, we need to understand the reasons for the difficult demoulding. Due to its high viscosity, liquid silicone is easy to adhere to the surface of the mold to form adhesion after overmolding, resulting in difficulty in separating the mold from the silicone. In this case, we can solve this dilemma by the following tricks.
Use a mold surface coating
Applying a special coating on the surface of the mold is one of the effective ways to solve the problem of difficult mold release. This coating has low surface tension and good non-adhesion, which can effectively reduce the adhesion of liquid silicone to the mold, making it easier to release from the mold.
This coating can be done with common materials such as polytetrafluoroethylene (PTFE) or silicone grease. PTFE has excellent non-adhesion and chemical stability, which can effectively reduce the friction between the mold and the silicone during the lLSR overmolding process, thereby reducing the adhesion and making the silicone easier to release from the mold. Silicone grease is also a commonly used surface coating material, which has good lubricity and non-adhesion, which can effectively reduce the contact surface area between the mold and the silicone and reduce the difficulty of mold release.
During the coating application process, it is necessary to ensure that the coating is uniform and completely adhered to the mold surface. Tools such as brushes, spray guns, etc., can be used to achieve an even application. In addition, attention should be paid to the thickness of the coating layer, as a coating that is too thick may affect the details of LSR lagging and a coating that is too thin may not have the desired effect of reducing adhesion. Therefore, it is necessary to grasp the thickness and uniformity of the coating during the coating process.
In short, the use of mold surface coating is a way to solve the problem of difficult mold release after liquid silicone lagging molding. By selecting the appropriate coating material and ensuring that it is evenly applied to the mold surface, the adhesion of the liquid silicone to the mold can be effectively reduced, making the silicone easier to release from the mold. This will help improve production efficiency and product quality, and bring convenience to the LSIR lagging production process.