mim power tool parts,knife rest - HR232

Metal injection molding (MIM) is a metal working process where finely-powdered metal is mixed with a measured amount of binder material to comprise a 'feedstock' capable of being handled by plastic processing equipment through a process known as injection mold forming. The molding process allows complex parts to be shaped in a single operation and in high volume. End products are commonly component items used in various industries and applications. The nature of MIM feedstock flow is defined by a physics called rheology.Current equipment capability requires processing to stay limited to products that can be molded using typical volumes of 100 grams or less per "shot" into the mold. Rheology does allow this "shot" to be distributed into multiple cavities, thus becoming cost-effective for small, intricate, high-volume products which would otherwise be quite expensive to produce by alternate or classic methods. The variety of metals capable of implimentation within MIM feedstock are referred to as powder metallurgy, and these contain the same alloying constiuents found in industry standards for common and exotic metal applications. Subsequent conditioning operations are performed on the molded shape, where the binder material is removed and the metal particles are coalesced into the desired state for the metal alloy.

Process

The process steps involve combining metal powders with wax and plastic binders to produce the 'feedstock' mix that is injected as a liquid into a hollow mold using plastic injection molding machines. The 'green part' is cooled and de-molded in the plastic molding machine. Next, a portion of the binder material is removed using solvent, thermal furnaces, catalytic process, or a combination of methods. The resulting, fragile and porous (2-4% "air") part, in a condition called "brown" stage, requires the metal to be condensed in a furnace process called Sintering. MIM parts are sintered at temperatures nearly high enough to melt the entire metal part outright (up to 1450 degrees Celsius), at which the metal particle surfaces bind together to result in a final, 96-99% solid density. The end-product MIM metal has comparable mechanical and physical proerties with parts made using classic metalworking methods, and MIM materials are compatible with the same subsequent metal conditioning treatments such as plating, passivating, annealing, carburizing, nitriding, and precipitation hardening.

The so called powder metals have 3 major advantages: (A) high precision due to mold-based production (B) low price due to its inherent feature of automation for mass production, and (C) flexibility of material composition due to wide variety of powder formula on Fe-Ni alloy.

More than 200 types of vehicle parts and motorcycle parts, i.e., metallurgical parts, are made of sintered metals. This implies that the safety of long-term operation for sintered parts (or powder parts ) is pretty ensured. At last, in order to improve the ductility and elasticity of sintered metals (or sinter metal, sinter parts, sinter bush, sinter gear ) in machinery, the alloy that includes copper and iron becomes the main stream. This is only available by employing the technology of powder metallurgy and sintering. Since 2006, Hengrui has been providing the sintered parts for mechanical parts buyers such as Sainty, Shimano. Besides, we supplied sintered metal parts for Medical equipment makers such as Frankenman. Power tool is another giant buyer such as Emerson and Black & Decker.

The material can be customerized by chemical composition formula so that most mechanical strength such as ductility, tensile strength and hardness can be fulfilled at the same time. Since it is made by molds, then the tolerance of dimensions can be up to 5 microns or better. The delivery cycle can be shortened and the unit prices can be further reduced owing to mass production so that enormous stock in conventional manner is not completely necessary for the buyers. You will not regret to use our metal products.

If you want us to produce your spare parts,pls kindly provide us the following information:

1.2D&3D drawings

2.the materials,surface treatment,and the hardness requirements

3,the quantities you want

4.the usage

5.any other requirements if you have any.