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Injection Molding

Injection molding is a process K.C. Seals uses when our customers are looking for high production, geometrically complex plastic or thermoplastic sealing components. The process is quite fast, with the ability of producing 1000’s of parts in hours. It is however quite expensive in regards to setup fees, so in-depth analysis is definitely needed when looking at cost benefit.

Materials Available

Polytetrafluoroethylene
Polyetheretherketone
Polyimides
Sulfone and Sulfides
Urethanes

 

Pros

  • Low costs in mass production per piece
  • High precision
  • Geometries only limited by mold manufacturability.
  • High strength components
  • Product consistency

 

Cons

  • Very expensive tooling costs

Compression Molding

Compression molding is a method of molding in which the molding material, generally preheated, is first placed in an open, heated mold cavity. It is this method that KC Seals utilizes the most for high production quantities in elastomeric sealing components. Products such as u-cups, elements, and elastomer V-Seals are very popular when it comes to compression molding.

Materials Available

Elastomers
Urethanes

 

 

Pros

  • Cheaper setup costs in comparison to injection molding
  • Capable of large size parts beyond the capacity of extrusion techniques
  • Cheap costs per piece
  • Fewer knit lines and less fiber-length degradation than injection molding.

 

Cons

  • Limited too flat or moderately curved parts
  • Less-than-ideal product consistency

CNC Turning and Milling

CNC Turing and Milling is absolutely our most popular manufacturing capability. It was our first to initiate and we have been machining seals for over 15 years now. Typically used for prototyping, small quantity batches, and quick turnarounds. K.C. Seals is a proven leader in the turning and milling of both plastic and elastomeric sealing components.

Materials Available

Elastomers
Polytetrafluoroethylene
Polyetheretherketone
Polyimides
Sulfone and Sulfides
Urethanes

 

Pros

  • Very precise with tight tolerances
  • Prototyping
  • Quick turnarounds
  • Wide variety of materials available

 

Cons

  • Expensive per piece cost
  • Slower than multi-cavity compression and injection molding