The main templates of continuous molds include punch fixing plate, pressing plate, concave plate, etc. The structure design is in the following forms according to the accuracy of stamping products, production quantity, processing equipment and processing methods of the mold, and maintenance methods of the mold: (1) Monolithic type, (2) Yoke type, (3) Insert type.
Monolithic formwork is also known as one-piece construction type, and its processing shape must be closed. The monolithic template is mainly used for the mold with simple structure or low precision. Its processing method is mainly cutting (without heat treatment). The template with heat treatment must be subjected to wire cutting or electrical discharge machining and grinding. When the size of the template is long (continuous mold), two or more pieces of one-piece type will be used together.
The central part of the yoke formwork is grooved to assemble block products. Its structure is based on application requirements, and the groove portion can be formed by other templates. The advantages of this yoke formwork structure are: the groove part is easy to process, the groove part width can be adjusted, and the processing accuracy is good. But its low rigidity is its disadvantage.
The circular or square concave parts are processed in the template, and the block parts are embedded in the template. This template is called an embedded structure. This structure has less cumulative machining tolerance, high rigidity, and accurate reproducibility during disassembly and assembly. good. Due to the advantages of easy machining, the machining accuracy is determined by the working machine, and the final adjustment process is less, the insert-type template structure has become the mainstream of precision stamping dies, but its disadvantage is that a high-precision hole processing machine is required.