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當前位置:利用石膏模的脫蠟鑄造法介紹
[來源:www.voipblast.net] [作者:精密鑄造] [日期:17-02-10]
利用石膏模的脫蠟鑄造法 Using the method of lost wax casting gypsum mould 牙科用、戒指、首飾、裝飾品和小型工藝品均應用這種方法作成,石膏作為粘結劑用,主體為白硅石等耐火材料。 Dental, rings, jewelry, ornaments and small arts and crafts are applying this method to finish, gypsum used as binder, the main body of white silica refractory, etc. 將金屬制作之成品原模型,放在兩片橡膠之間,放于熱壓機上加熱加壓,使橡膠產生永久變形,而形成模型物之空模穴。將兩片橡膠對合、鎖緊,使注入口緊靠于注蠟機之注出口,以0.2~0.5 kg/cm2 之力力將熔蠟注滿橡膠模。 The metal to produce the finished product of the original model, placed between two pieces of rubber, and the pressure on the hot pressing machine heating, make the rubber to produce permanent deformation, to form a model of empty cavity. The two pieces of rubber involution, lock, make note of injection closemouthed on in wax injection machine exports, with the power of 0.2 ~ 0.5 kg/cm2 force will melt wax filled with rubber mold. 冷凝之后打開橡膠模, 取出蠟型, 使用低功率之烙鐵局部熔化蠟型, 將之焊接于充當流道之蠟干上,進行組樹作業,將組樹放入不銹鋼環內,倒入石膏漿,然后振動和真空脫泡。石膏模硬化后在室溫放置12小時以上,使用電爐(120~150℃)或壓力鈉蒸汽脫蠟,脫蠟后的鑄模緩緩升溫到650~800℃燒成,將滲附于石膏表面的蠟質完全燒除。殘余蠟質燃燒不完全時,成為碳殘留會在鑄件表面形成缺陷。在燒成溫度保持一段時間,使鑄模內外溫度均勻,在爐內徐徐冷邿到適于澆注的溫度,然后取出石膏模放入真空鑄造機或離心鑄造機內進行澆注。首飾如戒指、胸針等形狀十分復雜,具有細微凹凸紋路之成品均以離心鑄造法制成。 Condensation after open the rubber mold, remove the wax type, using low power of the soldering iron partial melting wax type, welding for a port of wax dry, group tree operations, the group tree into the stainless steel ring, pour into the gypsum slurry, then the vibration and vacuum deaeration. Of plaster mould hardening at room temperature after 12 hours, using electric furnace (120 ~ 120 ℃) or sodium pressure steam dewaxing, slowly lost wax mold after burn into heating to 650 ~ 800 ℃, which is attached on the surface of the gypsum wax burn completely. Residual wax, incomplete combustion can become carbon residue formed in the casting surface defects. In the sintering temperature to maintain a period of time, make the mold inside and outside temperature uniformity, in cold 邿 to fit for pouring furnace temperature, and then remove the plaster mould in a vacuum casting machine or within the centrifugal casting machine casting. Jewelry such as rings, brooches shape is complex, slightly concave and convex texture of the finished product in centrifugal casting. 鑄造機附設有高周波加熱裝置以熔化坩堝內之貴金屬,再藉離心力(400~1000rpm)使熔融金屬注滿石膏模,冷凝后錘打不銹鋼環,取出石膏模,再以水槍沖散石膏,取出鑄件處理之。如佛像花瓶或其它較大件之工藝品則使用真空鑄造機制成。 Casting machine for high frequency heating equipment to melt in the crucible of precious metals, (400 ~ 1000 RPM) again by centrifugal force, the molten metal filling of plaster mould cooling after hammering stainless steel ring, remove the plaster mould, again with water gun, gypsum, flushes out of casting processing. Such as Buddha vase or other larger handicraft, use vacuum casting system.
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