The parting surface design of two-color liquid silicone mold is a crucial link, which directly affects the appearance quality and production efficiency of the product.
First, when designing the parting surface, the shape and structure of the product need to be considered. For products with complex shapes, the design of the parting surface should follow the outline of the product as much as possible to ensure that the product can be smoothly ejected from the mold when the mold is opened. For example, for products with curved surfaces and corners, curved surface parting or step parting can be used to match the parting surface with the shape of the product to reduce the resistance during demolding.
Secondly, the location selection of the parting surface is also very critical. Generally speaking, the parting surface should be selected at the largest cross-section of the product or at a location that does not affect the appearance of the product. This ensures the strength and stability of the mold, and also facilitates the processing and maintenance of the mold. In addition, the location of the parting surface should also take into account the flow direction and filling method of the liquid silicone to ensure that the silicone can be evenly filled into various parts of the mold to avoid defects such as bubbles and lack of glue.
When designing the parting surface, the sealing of the mold also needs to be considered. Two-color liquid silicone mold usually needs to be injection molded under high pressure, so the sealing of the parting surface must be good to prevent silicone leakage. In order to improve the sealing of the parting surface, precision machining methods can be used to ensure the flatness and smoothness of the parting surface. At the same time, sealing elements such as sealing strips or sealing rings can be set on the parting surface to further enhance the sealing of the mold.
In addition, the design of the parting surface should also take into account the opening and closing methods of the mold. Different opening and closing methods have different requirements for the design of the parting surface. For example, for a horizontal parting mold, the parting surface should be designed between the upper and lower molds of the mold; for a vertical parting mold, the parting surface should be designed between the left and right molds of the mold. When designing the parting surface, the mold's guide mechanism and positioning device must also be considered to ensure the accuracy and stability of the mold during the opening and closing process.
In short, the design of the parting surface of the two-color liquid silicone mold is a comprehensive issue, which requires consideration of multiple factors such as the shape, structure, sealing, and opening and closing methods of the product. Only through reasonable design and precision machining can the quality and production efficiency of the mold be ensured to meet customer needs.
