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当前位置:利用石膏模的脱蜡铸造法介绍
[来源:www.hslcasting.com.cn] [作者:精密铸造] [日期:17-02-10]
利用石膏模的脱蜡铸造法 Using the method of lost wax casting gypsum mould 牙科用、戒指、首饰、装饰品和小型工艺品均应用这种方法作成,石膏作为粘结剂用,主体为白硅石等耐火材料。 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. 将金属制作之成品原模型,放在两片橡胶之间,放于热压机上加热加压,使橡胶产生永久变形,而形成模型物之空模穴。将两片橡胶对合、锁紧,使注入口紧靠于注蜡机之注出口,以0.2~0.5 kg/cm2 之力力将熔蜡注满橡胶模。 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. 冷凝之后打开橡胶模, 取出蜡型, 使用低功率之烙铁局部熔化蜡型, 将之焊接于充当流道之蜡干上,进行组树作业,将组树放入不锈钢环内,倒入石膏浆,然后振动和真空脱泡。石膏模硬化后在室温放置12小时以上,使用电炉(120~150℃)或压力钠蒸汽脱蜡,脱蜡后的铸模缓缓升温到650~800℃烧成,将渗附于石膏表面的蜡质完全烧除。残余蜡质燃烧不完全时,成为碳残留会在铸件表面形成缺陷。在烧成温度保持一段时间,使铸模内外温度均匀,在炉内徐徐冷邿到适于浇注的温度,然后取出石膏模放入真空铸造机或离心铸造机内进行浇注。首饰如戒指、胸针等形状十分复杂,具有细微凹凸纹路之成品均以离心铸造法制成。 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. 铸造机附设有高周波加热装置以熔化坩埚内之贵金属,再藉离心力(400~1000rpm)使熔融金属注满石膏模,冷凝后锤打不锈钢环,取出石膏模,再以水枪冲散石膏,取出铸件处理之。如佛像花瓶或其它较大件之工艺品则使用真空铸造机制成。 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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