粉末射出介紹

粉末射出介紹

INTRODUCTION of MIM PROCESS

Metal injection molding (MIM) is a technology that combines the strengths of conventional powder metallurgy and plastic injection molding. It is the most cost-effective process in making small parts with complicated shapes.

The process starts with kneading fine metal powders and thermoplastic binders. The kneaded feedstock is then granulated and fed into injection molding machine. Under pressure and heat, the feedstock flows into the mold cavity forming the desired shapes. After being removed from the mold, the molded parts go through a debinding process to remove the binders. The debound parts are then sintered to a density greater than 95%

process :
Metal powder → Kneading → Injection Molding → Debinding and Sintering (machining) → Finished part

Process information about MIM
tooling detailno. of cavities1~8
tooling life time per cavity200000 shots
cleaning intervalafter every production
molding process temp.80~185
hydraulic injection pressure500~1500 bar
processname of injection molding machineARBURG ; FANUC
name of sintering ovenShimadzu
process timeinjection30 second
debinding12Hr ~ 24Hr
sintering 18Hr ~ 24Hr
other process (total in days)7~14
total capacity of injection per day (pcs)1500~8000
delivery time of optimal batch in days30~45

MIM-011.jpg
Injection Molding equipment
MIM-021.jpg
Injection Molding Equipment
MIM-031.jpg
Debinding and Sintering Equipment (Japanese Equipment – Shmadzu)
MIM-041.jpg
Debinding and Sintering Equipment (USA Equipment – CVI)
MIM-051.jpg
Size of the parts before and after sintering.
MIM-061.jpg
Photo of the MIM samples

常用材料成分及其機械性質
機械性質密度 (g/cm3)抗拉強度 ( MPa )伸長率 ( % )熱處理前硬度熱處理後硬度C%Ni%Mo%Cr%Cu%OthersFe
Fe-2% Ni7.535020HRB 85Max.HRC52< 0.152----Bal
Fe-8% Ni7.645025--< 0.158----Bal
4650 *7.515002HRC 18~30Max.HRC550.520.5---Bal
316L7.450040HRB 70-< 0.03112.217-1.4MnBal
440C7.516002-Max.HRC5510.60.7517-1.0 Mn / 1.0 SiBal
17-4PH *7.512004HRC22~33Max. HRC 380.054-174-Bal
M2 *> 8.018000.5-Max. HRC 620.9-0.54-2.0V / 6.0WBal
We still have other materials such as WC, Fe50Ni....Etc.

產品關鍵字粉末射出零件
production process成型 / 脫脂 / 燒結 / 震盪研磨 / 加工
features當產品太複雜且太小而不適合用傳統粉末冶金燒結時, MIM是一個很好的選擇.
material極細燒結金屬粉末混合塑膠黏著劑 : Fe2Ni, Fe8Ni, 4605, 8640, stainless steel 316, stainless steel 17-4, M2, Tungsten carbide / WC 及其他材料
applications電子零件, 門鎖系統, 產業機械零件, 汽車零件, 航太零件, 醫療器材零件