Perierat spumam processum
The lost foam casting process can be traced back to April 15,1958, the American scholar H.F. Shruyer It was patented for casting using foam models until the summer of 1990, when the 11th chapter of the American Foundry Society officially named it after the new process. The name "disappear model" is good, because these three words are reversed to understand the direction and content of the disappearance die {{{VII}} Disoing moriatur est studere in "defectio" de "mori", quod peritum modus, tempus et moles diei {{VIII}}
In the process of discussing the "disappearance mode", the first basic principle that the disappearance mode casting must be followed: the disappearance mode casting must create high temperature without oxygen conditions, so that the foam mode in the cavity can disappear through gasification. If you can not create high temperature without oxygen conditions, the foam mold in the cavity must be burned, make it completely burned, the combustion products to eliminate the cavity. So you can avoid Carbon defectus {{II}} creare summus temperatus sine oxygeni conditionibus potest inertes Gas praesidio modum, ut negative pressura suctu cavitatis in effusione processus non habet oxygeni {{{III}}
In the process of discussing the "disappearance time", we realized that the disappearance die casting is the replacement of the liquid metal to the foam model, and summarized the second basic principle that must be followed: conditions must be created to balance the disappearance speed of the foam and the filling speed of the liquid metal. If the filling rate of liquid metal is faster than the gasification rate of foam, the liquid contraction of liquid metal is buried, then the stomatal defect may Fit {{I}} effundens celeritatem abstulit mori mittens non est velocius melius, secundum specifica situ de spumam type {{II}} Tenuis, ut saturati, ut impleret, et densissima et magnis positus, {{{}}
Discussion in the process of "disappear", through the foam completely, leave no trace disappear condition study, put forward "a low two three breathable" overcome disappear die casting foam disappear legacy formula, namely: use low density foam, higher temperature liquid metal pouring, coating transparent performance good condition, foam will completely disappear and leave no trace. The unique defect of disappearing die casting can be defined as the traces left during the Exitum de spumam exemplar {{I}}
