D-M-E — Heat Pipes

Reduce cycle time
Improve part quality
Simplify mold and die design
Reduce operating and maintenance costs
Upgrade existing molds and dies
Salvage damaged molds and dies
HOW AND WHERE HEAT PIPES WORK
The D-M-E Heat Pipe is a heat transfer device specifically designed for optimal performance in plastic injection molds and dies for the die casting industries. The D-M-E Heat Pipe consists of a vacuum-tight copper tube containing a wick and a non-toxic working fluid. The two ends of the Heat Pipe perform distinct functions (R)C one end is an evaporator, the opposite end is a condenser. Thermal energy is gathered at the evaporator end, vaporizing the working fluid. This vapor then travels through the Heat Pipe to the condenser end. At the condenser end the vapor condensates back into a liquid, giving up its latent heat in the process. To complete the cycle the condensed liquid then travels along the wick, via capillary action, back to the evaporator section. This process repeats itself continuously, transferring heat many times faster than pure copper.
HOW HEAT PIPES ARE USED
Available in a variety of standard lengths and diameters, D-M-E Heat Pipes are used in cores, core slides, cavities and other areas of a mold or die requiring cooling or controlled temperatures. Commonly used in place of bubblers, baffles, fountains or blades, Heat Pipes transfer heat rapidly to the coolant, rather than requiring the coolant to flow into the heated area. They are also used to transfer heat to a cooler portion of the mold (which serves as a heat sink) or to open air, thereby permitting cooling of otherwise inaccessible areas and eliminating potential coolant leakage.
STANDARD TYPES AVAILABLE FOR INJECTION MOLDING
The standard line of Heat Pipes for injection molding includes both a low temperature (TPL) and a high temperature (TPH) series. The TPLSeries works most efficiently between the temperatures of 40°,and 200° with a coolant temperature of approximately 60°,t 80°,F, and the TPH Series between 150°,and 400 with a coolant temperature of approximately 90°,t 110°,F. The sealed end of each heat conductor is color-coded (BLACK for the TPLSeries and WHITE for the TPH Series). Selection of the appropriate series is based on the application°Os melt, mold surfac and coolant temperatures to which the Heat Pipe will be subjected.
FOR DIE CASTING
For die casting applications, Heat Pipes in the TPDC Series provide an operating temperature range of 150°,to 600°,F with a coolant temperature of as hig as 190°,F. The sealed end of each TPDC Series hea conductor is color-coded RED. The TPDC Series should always be used for die casting because of the higher shot, die surface and coolant temperatures involved.