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Metal Injection Molding Service

RJC has over 20 years of experience designing, producing and operating mold tooling.

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What is Metal injection molding (MIM)?

Our injection mold making system is a proprietary process focused on achieving maximum efficiency in every phase of mold design, analysis, production, try-out, and injection molding production executed by a highly skilled team using state of the art equipment.  This allows us to quickly convert 3D part data into high quality injection molded components in the resins our customers specify in volumes from dozens to hundreds of thousands.

Based on this experience, we developed one of the most streamlined and repeatable in-house mold manufacturing process that allows us to typically ship first article molded parts in fifteen business days or less.  For extremely rushed projects, depending on complexity, we can deliver molded parts in as little as five business days.

Metal Injection Molding Materials

The most commonly used elements in MIM processing are:

  • Iron
  • Nickel
  • Chromium
  • Molybdenum
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  • A-286 – Excellent corrosion resistance, high temperature strength
  • Hastelloy X – Good oxidation resistance, high temperature strength
  • Inconel 625 – Excellent corrosion and heat-resisting characteristics
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Stainless Steels

  • 17-4PH – Best combination of strength and corrosion resistance
  • 316 – Excellent corrosion resistance
  • 420 – High hardness
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Low Alloy Steels

  • 2200 – Similar to PM FN-0200, good magnetic and toughness properties
  • 4605 – High treatable, high-strength steel, up to HRC 52
  • 4140 – Heat treatable, high-strength steel, up to HRC 60
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Controlled Expansion Alloys

  • Fe-Ni – The alloy composition (ie, Invar, Alloy 42, etc) can be tailored for the application’s thermal expansion requirement
  • F15 – AKA Kovar®, the alloy is engineered for hermetic glass-metal seals
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High Density Alloys

  • W-based – High temperature sintering proficiency allows various tungsten-nickel-iron alloy capability; sintered densities range up to 18 g/cc
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Soft Magnetic Alloys

  • Fe-Si – Silicon content up to 9% allows for high resistivity with good soft magnetic response
  • Fe-Co – Excellent magnet saturation properties

RJC Metal Injection Molding Advantages

  • Achieves net shape features such as internal and external threads, profiled holes and finely detailed surface textures, knurling, engravings and markings.
  • Provides for the manufacture of micro-sized parts in high volumes.
  • Allows the freedom to manufacture complicated shapes with minimal waste that would be considered cost prohibitive by other methods.
  • Makes it much easier to produce complex metal parts that are sometimes impossible to create using other metal fabrication processes.

RJC Metal Injection Molding Design Guidelines

Yield Strength Mpa (ksi) 730-1090 (106-158)
Hardness HB (Vickers) 285-323 (285-320)
Improve with Heat-Treating
% Strain .44 Standard Elasticity
Corrosion Resistance 0 to < 500 hours salt spray (Dependent on alloy)
Design Flexibility Complex Contoured Geometries Limits on size and wall section
Dimensional Tolerances +/- 0.075 mm
Part Draft Requirements Draft preferred
Zero draft possible
Part Size < 1g to 100g
Surface Finish 0.08 – 1.1 Ra μm
Max / Min Wall Thickness 6 mm / 0.30 mm

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Medical Manufacturing

RJC produces a variety of medical components through the MIM process, including endoscopic instruments, surgical instruments, and dental pliers. From design to production, we can assist in the complete manufacturing process and deliver value by creating near net shape components requiring little or no secondary operations.

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Aerospace and Defense

The aerospace and defense industries are quickly transforming from typical metal developing techniques to take advantage the MIM process. MIM is an outstanding means to produce aerospace components that are high-grade, precise, affordable, and also resilient.

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Firearms Components

MIM is a cost-efficient procedure for generating affordable, top notch weapons parts. The process produces near web form components getting rid of costly machining or the disparities of investment castings. RJC has extensive experience in creating complete weapon components.

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One of one of the most common uses MIM is for the creation of orthodontic devices, including brackets and also hooks. While orthodontic gadgets were typically developed utilizing investment casting, producers have actually recognized the cost savings and premium products that MIM provides. MIM is able to produce solid, smooth, and specific components in a selection of metals, consisting of stainless-steel.

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RJC has actually invested the most recent innovation to keep pace with the rapid moving telecommunications and also electronics market. Our MIM process can create elements that are virtually internet shape needing little second procedures and also eliminating expensive machining procedures. The MIM process supplies raincreased value.

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Industrial and Consumer Applications

MIM can creating little, complex parts for usage in a selection of industrial as well as customer applications. Because MIM permits high production volumes, the reduction or removal of additional machining, and also a cost-efficient price point, the innovation is supplying significant worth for our consumers.

Contact RJC now for service information