Large Diameter Tubing
Instock Cylinder Tubing
  Custom-Designed Products

Compression Molding

Custom-Designed Products.


The Alternative to Metal
Compression-molded parts offer a strong, lightweight alternative to die-cast, stamped or other formed metal parts due to their superior:

  • Corrosion Resistance
  • Chemical Resistance
  • Heat Resistance
  • Fire Retardation
  • Weight Profile
  • Weather Resistance
  • Colorfastness
  • Strength
  • Microwave Transparency

Amalga uses a variety of manufacturing processes to meet your requirements: 

  • Sheet Molding Compound (SMC)
  • Low-Pressure Molding Compound (LPMC)
  • Bulk Molding Compound (BMC)
  • Thick Molding Compound (TMC)
  • Structural Molding Compound (SMC)
  • Preform and Mat Process

Amalga Composites manufactures compression-molded products for a variety of applications:

  • Medical
  • Electrical
  • Mechanical
  • Transportation
  • Dishware
  • Sanitary Ware
  • Sporting Goods

Engineering Assistance
Our doctoral-level engineering expertise turns ideas into production quicker than metal technology.

Why Choose Compression Molding?

  • Low Material Cost
  • Fast Cycle Rate
  • High Production Volume
  • Customized Compounds
  • Molded in Color
  • Surface Finish - Cosmetic or Textured
  • Combined Components - Eliminate Spot-Welded Sub-Assemblies
  • Strength - Up to 55,000 psi
  • Corrosion Resistant
  • Fire Retardant
  • Food Grade
  • Weight Savings – One Fourth the Weight of Steel
Compression Molding Processes


Bulk Molding Sheet Molding Thick Molding SMC Random Fiber SMC-Chop/Continuous Preform
Bosses & Ribs Yes Yes Yes Yes No No
Cosmetic Appearance Good Good Good Fair Fair Fair
Type of Part Casting Stamping Cast & Stamping Casting Casting Stamping
Size of Part Small Large Medium Large Large Large
Tensile Strength (psi) 5,000 12,000 10,000 23,000 55,000 14,000
Flexural Strength (psi) 15,000 26,000 22,000 37,000 85,000 28,000
Specific Gravity 1.90 1.75 2.00 1.85 1.80 1.20

Process Comparison to Steel


Sheet Molded Compound Injection Molded Thermoplastic Aluminum
Part Consolidation Excellent Excellent Fair
Comparable Mass 75% 70% 75%
Corrosion Resistance Best Better Good
Impact Resistance Best Better Poor
Tooling Cost 40% 60% 100%
Stiffness 6% 2% 30%
Thermal Expansion 100-130% 600-1000% 170-200%


The properties listed do not constitute any warranty or guarantee of values.  These properties are for material selection purposes only.  For applications requiring guaranteed values, independent verification should be conducted. 


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