申请人:E.I. DU PONT DE NEMOURS AND COMPANY
公开号:EP0499486A2
公开(公告)日:1992-08-19
A method and composition for forming investment casting patterns wherein thermally-collapsible microspheres are incorporated into the pattern composition. The patterns can be made either by conventional pattern forming techniques or by solid imaging techniques. After investing the microsphere containing pattern in the ceramic shell, the pattern and shell are heated, causing a collapse of the microspheres and thereby preventing cracking of the shell. The shell is then heated to burn-out the remaining pattern material and fire the shell, thereby creating a mold.
一种用于形成熔模铸造图样的方法和组合物,其中在图样组合物中加入了热塌缩微球。可以通过传统的图案成型技术或实体成像技术制作图案。将含有微球的铸型投入陶瓷型壳后,加热铸型和型壳,使微球塌陷,从而防止型壳开裂。然后对外壳进行加热,以烧掉剩余的图案材料并烧制外壳,从而形成一个模具。