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Cast-In  Heaters for Diverse Applications

Although Tempco is widely recognized as the industry leader in manufacturing Cast-In heater/coolers for the plastics industry, our capabilities and the application possibilities for utilizing Cast-In Heater Technology extend far beyond the scope of plastics machinery. Tempco has set industry standards by creating custom designed Cast-In Heaters of every imaginable size, shape and electrical rating that can safely and practically address the diversified requirements of industrial and commercial markets.

Design Specifications


Casting Process
Permanent Molds: For large quantity runs, this process uses steel or cast iron molds and yields a superior finish and enhanced cosmetic value. No-Bake Sand Molds: For small quantity runs, this process requires wooden patterns. This is an economical, fast means of manufacturing tooling for lower volume casting requirements and for making prototypes.


Cast Alloys

Alloy

Maximum Surface Temperature

Aluminum 319 (Standard) 700°F (371°C)
Aluminum 356 (Optional) 750°F (399°C)
Pure Aluminum (Optional) 700°F (371°C)
Brass 1200°F (649°C)
Bronze 1350°F (732°C)
Iron 1200°F (649°C)

 

Cooling Tube Sizes and Materials

Stainless Steel —    (Standard) 1/4" O.D. x .020 wall
Stainless Steel —    (Standard) 3/8" O.D. x .035 wall
Stainless Steel —    (Standard) 1/2" O.D. x .049 wall
Stainless Steel —    (Optional) 5/8" O.D. x .049 wall
Incoloy® —    (Optional) 1/2" O.D. x .049 wall

 

Clamping Styles

Strap Clamping: 20 Gauge Type 430 Stainless Steel Straps with 1/4"-20 Bolts and Barrel Nuts—3/4", and 1/4" wide standard

Bolt Clamping: Specify Fastener Requirements

 

Dimensional

Cylindrical Platen
Minimum Inside Diameter 1" —
Maximum Inside Diameter 48" —
Minimum Width 2 1/2" 1 1/2"
Maximum Width 36" 60"
Minimum Length 2" 4"
Maximum Length 36" 72"
Finish 125 RMS Standard
Gap 1/4" top and bottom or to
 customer specification

 

Thickness for Cast-In Heaters (inches)

Casting Thickness Available Element Diameter
Heat Only  Maxium Available Cooling Tube Diameter
Cool Only   Maxium Element and Cooling Tube  Combination
Heat and Cool
5/8 .260 1/4 —
3/4 .260, .315, .430 3/8 —
1 .260, .315, .430 5/8 .260 and 3/8
1 3/8 .315, .430 1/2 .315 and 1/2
1 1/2 .315, .430 1/2 .430 and 1/2
1 5/8 .315, .430 1/2 .430 and 1/2
1 3/4 .315, .430 1/2 .430 and 1/2

Finned Casting

3/4 .260, .315 3/8 —
1 .260, .315, .430 1/2 .260 and 3/8
1 3/4 .315, .430 1/2 .430 and 1/2

 

Electrical

Tubular Heater Diameter .260" .315" .375" .430" .475"
Maximum Volts 240 277 480 550 550
Maximum Amps per element 15 30 40 40 40
Three Phase available depending on Casting Size
Resistance Tolerance:    +10%, -5%
Wattage Tolerance:    +5%, -10%
Maximum Watt Density Aluminum Alloy—35 W/in2 on the element
Maximum Watt Density Bronze or Brass—45 W/in2 on the element

 

Special Features
The following special features can be incorporated into Cast-In Heater designs. Specify exact dimensions and locations.
Holes Standoffs Cutouts
Taper Angles Slots Chamfers
Thermowells Electroless Nickel Plating Teflon® Coating
Mounting Studs Ground Studs