粉末射出介紹
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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






We still have other materials such as WC, Fe50Ni....Etc.
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 detail | no. of cavities | 1~8 |
tooling life time per cavity | 200000 shots | |
cleaning interval | after every production | |
molding process temp. | 80~185 | |
hydraulic injection pressure | 500~1500 bar | |
process | name of injection molding machine | ARBURG ; FANUC |
name of sintering oven | Shimadzu | |
process time | injection | 30 second |
debinding | 12Hr ~ 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 days | 30~45 |
Injection Molding equipment
Injection Molding Equipment
Debinding and Sintering Equipment (Japanese Equipment – Shmadzu)
Debinding and Sintering Equipment (USA Equipment – CVI)
Size of the parts before and after sintering.
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% | Others | Fe |
Fe-2% Ni | 7.5 | 350 | 20 | HRB 85 | Max.HRC52 | < 0.15 | 2 | - | - | - | - | Bal |
Fe-8% Ni | 7.6 | 450 | 25 | - | - | < 0.15 | 8 | - | - | - | - | Bal |
4650 * | 7.5 | 1500 | 2 | HRC 18~30 | Max.HRC55 | 0.5 | 2 | 0.5 | - | - | - | Bal |
316L | 7.4 | 500 | 40 | HRB 70 | - | < 0.03 | 11 | 2.2 | 17 | - | 1.4Mn | Bal |
440C | 7.5 | 1600 | 2 | - | Max.HRC55 | 1 | 0.6 | 0.75 | 17 | - | 1.0 Mn / 1.0 Si | Bal |
17-4PH * | 7.5 | 1200 | 4 | HRC22~33 | Max. HRC 38 | 0.05 | 4 | - | 17 | 4 | - | Bal |
M2 * | > 8.0 | 1800 | 0.5 | - | Max. HRC 62 | 0.9 | - | 0.5 | 4 | - | 2.0V / 6.0W | Bal |
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 |