Metal Injection Molding for Medical Component

Specifications

Medical Injection Molding/Metal Injection Molding for Medical Component

Major Industry: Medical device

Features: Anti-corrosion; Abrasive resistance; Heat resistance

Products:  Shank

1.MIM Technical Concept and Technical Characteristics

Metal Injection Molding Manufacturer offer MIM technology combines the advantage of both powder metallurgy and plastic injection technology. It breaks the shape limit of conventional PM compression molding, while absorbs the capability of forming complex shape and realizing mass production with high efficiency of plastic injection technology. As a near net shape technology for high-quality precision components,Metal Powder Injection Molding (MIM/PIM) in china has the advantages which conventional powder metallurgy, precision machining and casting methods would not have. Here shows these advantages as following:
◇Capable of production complex shape small metal parts as plastic injection process. Powder injection molding parts typical weigh is 0.1-200g;
◇Capable of forming kinds of complex shapes, such as external cuts, threads, tapered external surface, cross holes & blind holes, slots, ribs&webs, knurling, and so on.
◇Good surface finishes and high precision dimensions(typical in±0.3%～0.5%)
◇Wide range of material optional for MIM process. Parts with high density (typical 95%～99% relative density) and homogeneous structure and excellent performance easy to acquire;
◇ Able to realize high-volume production with stable quality and high efficiency.
Table 1 and 2 show the comparison between MIM and other processes.

Table 1 The comparison between MIM and Precision casting

characteristics	Precision casting	MIM
Minimum hole diameter	2mm	0.4mm
Maximum depth of ∮2mm blind hole	2mm	20mm
Minimum wall thichness	2mm	<1mm
Maximum wall thichness	No limit	10mm
Tolerance of ∮4mm	±0.2mm	±0.06mm
Surface roughness(Ra)	5um	1um

Table 2 The overall comparison between MIM and other processes

items	MIM	PM	Precision casting	machining
Density	98%	86%	98%	100%
Tensile strength	high	low	high >	high
Roughness	high	medium	medium	high
Miniaturization capability	high	medium	low	medium
Thin wall capability	high	medium	medium	low
Complexity	high	low	medium	high
Design toleration	high	medium	medium	medium
Material range	high	high	medium	high

MIM is applicable to wide range of materials which includes low alloy steel, stainless steel, tool steel, nickel-based alloys, tungsten alloy, carbide, titanium, magnetic materials, Kovar alloy and fine ceramics, etc.

Material System	Material composition	Typical applications
Low alloy steel	Fe-2Ni, Fe-8Ni	Automobile, machinery and other industries ,particularly in structural parts
Stainless steel	316L ,17-4PH, 420, 440C	Medical equipments, clocks, watches
Carbide	WC-Co	Various tools, clocks, watches
Ceramic	Al 2O3 , ZrO2 , SiO2	IT electronics, daily necessities, watches
Heavy Alloys	W-Ni-Fe, W-Ni-Cu, W-Cu	The arms industry, communications, daily necessities
Titanium	Ti,Ti-6Al-4V	Medical and military structural parts
Magnetic Materials	Fe, NdFeB, SmCo5,Fe-Si	Magnetic properties of the various components
Tool steel	CrMo4,M2	Tools

Table 2 Typical properties of several MIM materials:

Materials		Density	Hardness	Tensile strength	Elongation
		g/cm 3	Rockwell	MPa	%
Fe-based alloys	MIM-2200(Sintered)	7.65	45HRB	290	40
	MIM-2700(Sintered)	7.65	69HRB	440	26
	MIM-4605(Sintered)	7.62	62HRB	415	15
	MIM-4605(Quenching and tempering)	7.62	48HRC	1655	2
Stainless steel	MIM - 316L (Sintered)	7.92	67HB	520	50
	MIM- 17-4PH (Sintered)	7.5	27HRC	900	6
	MIM- 17-4PH (Sintered)	7.5	40HRC	1185	6
	MIM - 430L (Sintered)	7.5	65HRB	415	25
Tungsten alloys	95%W-Ni-Fe	18.1	30	960	25
	97%W-Ni-Fe	18.5	33	940	15
Carbide	YG8X	14.9	HRA90	Bending Strength 2300
Fine Ceramics	Al2O3	3.98	HRA92	Bending Strength 530

Products in our company cover kinds of applications : communication components, medical equipment components, automobile components, tool components, and so on. And there are more than one hundred parts in our company.

We are devoted to providing parts with complex shape, high precision, small size and large quantity and excellent service to our customers.