Technologies Archives - Page 31 of 37 - Manufacturer of Induction Heating Systems

High Frequency Heating Steel Pipe

High Frequency Heating Steel Pipe With Induction Heating Equipment

Objective To heat a steel pipe to 1100ºF (593ºC) to transport melted magnesium
Material Steel pipe 14.5’ (4.42m) long with a 3.5” (88.9mm)OD
Temperature 1100ºF (593ºC)
Frequency 9 kHz
Equipment • DW-MF-160kW induction heating system, equipped with a remote workhead containing one 25μF capacitor.
• An induction heating coil designed and developed specifically for this application.
Process A specially designed double U channel coil the length of the pipe is used in this application. The pipe is placed inside the coil and power is supplied. The voltage is set and the power output is 100kW. As the part reaches the Currie point the power drops to 80kW and the voltage must be increased to achieve the 140kW. The pipe reaches 1100ºF (593ºC) in 20 minutes.
Results/Benefits Induction heating provides:
• Controllable and repeatable heat pattern that keeps
material in liquid form
• Environmentally friendly
• Even distribution of heating
• Movable workhead that can be located away from the power supply

Induction Heating Magnetic Iron Oxide

Induction Heating Magnetic Iron Oxide in water for hyperthermia application

Objective Heating magnetic iron oxide (Fe2O3) in water for hyperthermia application to determine the curve of temperature vs. time during induction heating
Material Magnetic iron oxide in water (magnetic field is 50-200kHz, 30kA/m), glass vial
Temperature Varies
Frequency 344 kHz
Equipment • DW-UHF-4.5kW induction heating system, equipped with a remote workhead containing two 0.33μF capacitors for a total of 0.66 μF
• An induction heating coil designed and developed specifically for this application.
Process A two turn helical coil is used to heat the glass vial. The temperature vs. time results are:
• 66º – 107 ºF (19º – 42 ºC) in 10 seconds
• 66º – 145 ºF (19º – 63 ºC) in 20 seconds
• 66º – 170 ºF (19º – 77 ºC) in 30 seconds
Results/Benefits Induction heating provides:
• Rapid & localized heating
• Uniform controllable heat
• Small bench top footprint
• Even distribution of heating

induction heating graphite susceptor

Induction heating graphite susceptor for glass reflow for X-ray tubes

Objective Heat graphite susceptor for glass reflow in the manufacturing of x-ray tubes
Material Glass disc 0.98 x 0.12 “ (25 x 3mm), graphite susceptor, stainless steel holder, Glass bell jar 5.9” (150mm) OD
Temperature 1742 ºF (950º C)
Frequency 80 kHz
Equipment • DW-HF-25kW induction heating system, equipped with a remote workhead containing eight 0.3 μF capacitors for a total of 2.4 μF
• An induction heating coil designed and developed specifically for this application.
Process A two turn helical coil is used for heating. Six graphite susceptors are placed in the nitrogen atmosphere with glass discs and a stainless steel holder. In 32 seconds the required temperature of 1742 ºF (950º C) is reached causing the glass to reflow & the stainless steel holder to melt through the glass.
Results/Benefits Induction heating provides:
• Increased production, customer currently heating 4 susceptors
• 50% lower energy consummation
• Even distribution of heating

Induction Heating Steel Mold

Induction Heating Steel Mold For Rubber Seal With High Frequency Heating System

Objective To heat a steel mold evenly to 392ºF (200ºC) to be used on a press for rubber seal vulcanization
Material Steel mold 13.4” (340mm) diameter, 2.16” (55mm) width,
approximately 77.2 lbs (35kg)
Temperature 392ºF (200ºC)
Frequency 20kHz
Equipment • DW-MF-70kW induction heating system, equipped with a remote workhead containing eight 0.3μF capacitors for a total of 0.6μF
• An induction heating coil designed and developed specifically for this application.
Process Two thirteen turn pancake coils are used to heat both sides of the mold simultaneously for 170 seconds to reach an external temperature of 392ºF (200ºC). The power is continually decreased over the next 390 seconds to reach a uniform temperature of 392ºF (200ºC) ± 41ºF (5ºC) throughout the
mold.
Results/Benefits Induction heating provides:
• Repeatable and consistent heat
• Quicker process time, increased production
• Even distribution of heating

Induction Heating Steel Pipe To Remove plastic coating

Induction Heating Steel Pipe To Remove plastic coating With RF Heating System

Objective Recover the polypropylene insulation from hollow steel tubes to allow recycling of both the tubes and the insulation.
Material Hollow steel tubes 1/8” (0.318 cm) to 5/8” (1.59 cm) ID
Protective polypropylene coating
Temperature 150 ºC (302°F)
Frequency 185 kHz
Equipment • DW-UHF-4.5kW induction heating system, equipped with a remote workhead containing one 1.5 μF capacitor
• An induction heating coil designed and developed specifically for this application.
Process/Narrative A six turn letterbox shaped coil is used to heat the inner steel pipes. The plastic coating is softened enough to be easily removed and recycled. The time required to melt the plastic from one meter of wire is approximately 45 seconds. This varies based on the diameter of the tube.
Results/Benefits Induction heating is the only feasible way to remove the plastic coating,
leaving it in an unpolluted form for recycling. It is a faster processing method and also reduces in the company’s carbon footprint.

Induction Heating Bolts

Induction Heating Bolts And Nuts With High Frequency Bolts Heating Equipment

Objective Heating steel bolts to 1500ºF (816ºC) for thread rolling
Material H11 tool steel, A286 stainless steel, Titanium and 8740 alloy steel bolts of various sizes. Typical size is 1” (25.4mm) diameter, 1.5” (38.1mm) long
Temperature 1500ºF (816ºC)
Frequency 214 to 216 kHz depending on part
Equipment • DW-UHF-10kW induction heating system, equipped with a remote workhead containing two 1.25μF capacitors for a total of 0.625 μF
• An induction heating coil designed and developed specifically for this application.
Process A four turn helical coil is used to heat the shaft of the bolts to 1500ºF (816ºC). The 1” (25.4mm) diameter H11 bolts requires 30 seconds to reach temperature. The heating cycles
varies from 20 to 45 seconds depending on the size of the part.
Results/Benefits Induction heating provides:
• Faster cycle times and extended tool life with preheat step
• Hands-free heating that involves no operator skill for manufacturing
• Using same coil for various size blanks
• Stronger and more fatigue-resistant threads

Induction Heating Solutions For Cancer Research

Induction Heating Solutions For Cancer Research With High Frequency Heating System

Objective To heat solutions in vials to determine temperature differentials for cancer research
Material Five solutions with magnetic particles, vials
Temperature Check temperature values at 30 second intervals for 5 minutes
Frequency 226 kHz
Equipment • DW-UHF-30kW induction heating system, equipped with a remote workhead containing two 13.2μF capacitors for a total of 6.60μF
• An induction heating coil designed and developed specifically for this application.
Process A four turn helical coil is used to heat the vial for 30 second intervals for five minutes with a temperature reading taken at each interval. Each solution produced differing temperature profiles.
Results/Benefits Induction heating provides:
• Hands-free heating that involves no operator skill for manufacturing
• Even distribution of heating
• Ability to run consistent interval testing

Induction Preheating Welding Steel Pipe

Induction Preheating Welding Steel Pipe With High Frequency Heating System

Objective To preheat a steel pipe to 500ºF (260ºC) before welding.
Material Steel shaft assembly 5” to 8” OD (127-203.2mm) with a 2” (50.8mm) heat zone.
Temperature 500ºF (260ºC), if higher temperatures are required, heat time can be increased.
Frequency 60 kHz
Equipment • DW-HF-60kW induction heating system, equipped with a remote workhead containing eight 1.0 μF capacitors for a total of 8 μF.
• An induction heating coil designed and developed specifically for this application.
Process A multi-turn two position channel “C” coil, adjustable on a busbar is used to heat the desired heat zone. The coil is adjustable to fit various diameter pipes. The shaft is rotated in a fixture and heated for 3 minutes to achieve a temperature of 500ºF (260ºC).
Results/Benefits Induction heating provides:
• Preheating prevents shock to shaft which eliminates cracking in the welding phase.
• Hands-free heating that involves no operator skill for manufacturing.
• Even distribution of heating between the shank and the sleeve.

Induction Heating Sintering Copper Powder

Induction Heating Sintering Copper Powder With High Frequency Induction Sintering Heater

Objective Sintering copper powder to a stainless steel shaft
Material Steel shaft & shell assembly, approx 2” (50.8mm) diameter, 2” (50.8mm) tall, copper powder
Temperature 1600 ºF (871 ºC)
Frequency 54 kHz
Equipment • DW-HF-45kW induction heating system, equipped with a remote workhead containing eight 1.0 μF capacitors for a total of 8.0 μF.
• An induction heating coil designed and developed specifically for this application.
Process A four-turn helical coil is used to heat the assembly for five minutes. This provides slow, even heat for good penetration through the shell into the powder.
Results/Benefits Induction heating provides:
• Even heat through the shell to sinter the powder.
• A method that is easily integrated into an automated production line. The design may be adapted to
accommodate the indexed heating of several assemblies at the same time.
• Hand- free operation that involves no operator skill for manufacturing.

Induction Heating Automotive Motor

Induction Heating Automotive Motor With High Frequency Induction Heating Machine

Objective Heat steel to help bond an injection molded piece and help the reflow.
Material Steel motor body, 60 x 60 x 27 (2.4 x 2.4 x 1.1) mm(in)
Temperature 260ºC (500ºF)
Frequency 237 kHz
Equipment •DW-UHF-10kW induction heating system, equipped with a remote workhead containing a total 1.5 μF.
• An induction heating coil designed and developed specifically for this application.
Process/Narrative A two-turn binocular coil is used to simultaneously heat two steel motors prior to the injection molding process. This helps increase the bond strength between and reflow the plastic.
Results/Benefits Induction heating provides:
• Quicker process times with increased production rates versus a gas-fired oven. Ovens require long heat-up and cool-down times.
• Significantly reduced footprint
• Reduced handling due to location of the induction coil in proximity to the injection molding machine.