The early Shouban model was limited by various conditions, mainly because most of its work was done by hand.Makes the hand-plate model long and difficult to strictly meet the size requirements of the appearance and structure drawings,Therefore, its function of checking the appearance or structural rationality is also greatly reduced。
　　With the advancement of science and technology, the rapid development of CAD and CAM technologies,Makes the accuracy of the hand model possible. On the other hand, with the increasingly fierce competition in society,The speed of product development is increasingly becoming the main means of competition.The production of Shouban can effectively improve the speed of product development。
　　It is in this situation that the Shouban manufacturing industry has emerged as a relatively independent industry and has flourished. The hand boards are divided according to the means of production, which can be divided into manual hand boards and numerical control hand boards:
　(1) Manual Shouban:Its main work is done by hand。
　(2) CNC hand board: Its main workload is accomplished by CNC machine tools,And depending on the equipment used,Can be divided into laser rapid prototyping (RP, Rapid Prototyping) Shouban and machining centers (CNC) Shouban。
　　A:RP Shouban: The Shouban is mainly produced with laser rapid prototyping technology。
　　B: CNC Shouban: It is mainly a hand board produced by a machining center。
　　RP Shouban with CNC Shouban Compared Each has its advantages: