What are the advantages of three plate molds over two plate molds in injection molding?

1, The basic structure and working principle of the three board mold
The three plate mold, as the name suggests, consists of three templates, usually including a fixed mold seat plate, a moving mold seat plate, and an intermediate template. The design of this mold structure enables the mold to have higher flexibility and adjustability during the injection molding process. During injection molding, a cavity is formed between the middle template and the fixed mold seat plate, while a flow channel is formed between the middle template and the moving mold seat plate. The three board mold ensures precise control of the mold in various stages such as closing, injection molding, pressure holding, cooling, and demolding through special opening and closing mechanisms and guiding mechanisms.
2, Advantages of Three Board Mold Compared to Two Board Mold
Higher degrees of freedom in mold design
The three-layer structure of the three plate mold allows mold designers to have higher degrees of freedom in designing the cavity and flow channel. Compared with two plate molds, three plate molds can more flexibly adjust the depth, width, and shape of the cavity to meet the injection molding needs of different products. In addition, the three board mold can more easily achieve multi cavity design and improve production efficiency.
More optimized flow channel design
The middle template of the three board mold makes the flow channel design more flexible. Designers can optimize the length, width, and shape of the flow channel based on the actual needs of the product and the requirements of the injection molding process, in order to reduce the resistance loss of plastic in the flow channel, improve the fluidity and filling effect of plastic. This optimized flow channel design helps to reduce product defect rates and improve product quality.
Better exhaust performance
During the injection molding process, the air and volatile substances inside the mold need to be promptly discharged to avoid defects such as bubbles and shrinkage. The middle template design of the three board mold helps to improve the exhaust performance of the mold. By reasonably setting exhaust holes and grooves, the three plate mold can more effectively discharge the air and volatile substances inside the mold, reducing the defect rate of the product.
Higher mold life
The structural design of the three board mold ensures better stability and durability when subjected to injection pressure. Due to the use of special guiding and locking mechanisms to connect and fix the templates of the three board mold, the mold can maintain high accuracy and stability during the closing and demolding processes. This design helps to reduce wear and deformation of the mold and extend its service life.
More convenient for maintenance and upkeep
The three-layer structure of the three board mold makes the maintenance and upkeep of the mold more convenient. When a certain part of the mold malfunctions or wears out, only the corresponding template or component needs to be replaced, without the need for major repairs or reconstruction of the entire mold. This design reduces the maintenance and time costs of the mold, and improves production efficiency.