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MIM Technology — Hydraulic System Connectors
Metal Injection Molding (MIM) technology takes advantage of unique process
capabilities such as combining components into one complex co-molding and
bonding of dissimilar materials. MIM is utilized for relatively small,
complex components that require high strength and cost viability. Components
such as hydraulic system connectors for high-pressure fluid power systems
in automobiles and trucks are just a few components that benefit from MIM
technology.
The Process
The MIM process involves several steps: design, mold making, compounding,
molding, debinding and sinter.
- The design phase has engineers who utilize computer aided design technology
to prepare the product concepts and make the mold.
- During compounding, fine metal powders, thermoplastics, and other proprietary
ingredients are mixed to form a pelletized molding compound at a typical
volume ratio of 60% metal to 40% binder.
- Conventional injection molding machines are used to mold green parts
during the actual molding process.
- Using heat, the binding material is removed during debinding. The
brown parts are sintered in vacuum type furnaces during the final phase
of the MIM process.
MIM Advantages
MIM has many advantages over other forming processes. Its application
for complex parts, high volume and a variety of materials is superior to
other methods such as die cast and screw machine. Typical densities
for MIM range from 95% - 99%, which yield properties close to cast or wrought
products. MIM Components range in size from 0.1 grams to over 150 grams
in weight.
Mold construction may consist of either single or multiple cavities depending
upon the estimated annual volume. In most cases, quantities average
20,000 pieces per year minimum. Common materials for MIM include alloy
and stainless steels, and other non-ferrous alloys such as titanium.
For more information on the MIM process, contact our experienced MIM engineering
staff at http://www.pcc-aft.com/contact/contact3.html or
303-833-6000. |
