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                當前位置:熔▓模鑄造工藝
                [來源:www.hslcasting.com.cn] [作者:精密鑄造] [日期:19-08-10]

                熔模鑄造工藝,簡單≡說就是用易熔材料(例如蠟料或∮塑料)制成可熔性模型(簡稱熔模◢或模型),在其上塗覆若幹層特制的耐火塗料,經過人手幹燥和硬化形成一個整體型殼後,再用蒸汽或熱水從型殼中熔掉模型∩,然後把型殼置於砂箱中,在其四周填充幹砂造∏型,最後將鑄型放入焙燒▽爐中經過高溫焙燒(如采用高哼強度型殼時,可不必造型∑而將脫模後的型殼直接焙燒),鑄型或△型殼經焙燒後,於其中澆←註熔融金屬而得到鑄件。
                In investment casting process, the fusibility model is made of fusible material (e.g. wax or plastics), which is coated with some special refractory coatings. After drying and hardening, a whole shell is formed, then the model is melted out from the shell by steam or hot water, and then the shell is placed in the sand box. After filling with dry sand around the mold, the mold is finally put into the calciner and roasted at high temperature (for example, when the high strength shell is used, the mold shell after demoulding can be directly roasted instead of moulding). The castings are obtained by pouring molten metal into the mold or shell after roasting.
                熔模鑄件尺寸精度較●高,一般可達CT4-6(砂型鑄造為CT10~13,壓鑄為CT5~7),當然由於熔模鑄造的工藝過程復雜,影響鑄件尺寸精度的因素較多,例如◥模料的收縮、熔模的變形、型殼在加熱和冷卻過程中的線量變化、合金的收縮率以及在凝固過√程中鑄件的變形等,所以普通熔模鑄件的尺寸精度身后突然出現了一道金色雖然較高,但其一致性他們也不需要如此大費周仍需提高(采用中、高溫蠟料的鑄件尺寸一致性要提高很多)。
                The dimension accuracy of investment casting is high, generally up to CT4-6 (sand casting is CT10-13, die casting is CT5-7). Of course, due to the complex process of investment casting, there are many factors affecting the dimension accuracy of investment casting, such as shrinkage of die material, deformation of investment mould, linear change of shell during heating and cooling, shrinkage rate of alloy and so on. In the solidification process, the deformation of castings and so on, so the dimensional accuracy of ordinary investment casting is higher, but its consistency still needs to be improved (the size consistency of castings with medium and high temperature wax is much higher).
                壓制熔模時,采用型腔表面光潔度高的壓型,因此,熔模的表面光潔度也比較高。此外,型殼由耐高溫的特殊粘結劑和耐火材料配制成的耐火塗料塗這名仙君頓時被轟成了粉碎掛在熔模▓上而制成,與熔融金屬直接接觸的型腔瑤瑤很是滿足內表面光潔度高。所以,熔模鑄件的表面光潔度比※一般鑄造件的高,一般可達Ra.1.6~3.2μm。
                When pressing the melting die, the high surface finish of the cavity is used, so the surface finish of the melting die is also higher. In addition, the shell is made of a refractory coating made of a special high temperature binder and refractory material, which is coated on the melting die. The inner surface of the cavity directly contacted with the molten metal has a high smoothness. Therefore, the surface finish of investment castings is higher than that of ordinary castings, generally up to Ra.1.6-3.2 um.

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