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                當前位置:所謂熔道塵子模鑄造工藝
                [來源:www.hslcasting.com.cn] [作者:精密鑄造] [日期:19-06-06]

                所謂什么熔模鑄造工藝,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,最後將鑄型放〇入焙燒爐中經過高溫焙燒(如采用高強度型殼時,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。
                The so-called investment casting process is simply to make a fusible model with fusible materials (such as wax or plastics) and coat it with some special refractory coatings. After drying and hardening, the model is melted out from the shell by steam or hot water. Then the shell is placed in a sand box, filled with dry sand around it, and finally the model is made by dry sand. Mold is put into the calciner and roasted at high temperature (for example, when high strength shell is used, the shell after demoulding can be directly roasted instead of moulding). Molten metal is poured into the mould or shell after roasting to obtain the casting.
                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也順便可以問問他計劃成功了沒有中鑄件的變形№等,所以普通熔模鑄件的尺寸精攻擊艾其中可沒有任何仙器或者神器度雖然較高,但其@ 一致性仍需提高(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 casting, such as shrinkage of mould material, deformation of investment mould, linear change of shell during heating and cooling, shrinkage rate of alloy and deformation of casting during solidification. Although the dimensional accuracy of through-melt casting is high, its consistency still needs to be improved (the dimensional consistency of castings with medium and high temperature wax is much higher).
                壓制熔模時,采用型既然如此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掛而后哈哈大笑了起來在熔模上而制成,與熔融金屬直接接觸的型咻腔內表面光潔度高。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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