PVO and NIR pre-vulcanization ovens
Pre-vulcanization systems are suitable for curing the outer surface of the profile to stabilize its geometry before coming into contact with the vulcanization oven conveyor belt.
The pre-vulcanization temperature inside the oven reaches about 600°C in the PVO system and 950°C in the NIR system.
PVO and NIR pre-vulcanization ovens
Pre-vulcanization systems are suitable for curing the outer surface of the profile to stabilize its geometry before coming into contact with the vulcanization oven conveyor belt.
The pre-vulcanization temperature inside the oven reaches about 600°C in the PVO system and 950°C in the NIR system.
High-speed hot air ovens
The principle of operation of the system developed and implemented by Colmec is based on the circulation of forced hot air at high speed inside two concentric chambers. The outer area, where hot air circulates at low speed, is called the preheating tunnel because the air in this area is preheated before flowing or flowing back into the inner area by high-capacity blowers. The interior area, where hot air circulates at high speed, is called the vulcanization tunnel where the profile or cable vulcanization takes place. The air temperature can be adjusted up to 400 °C and the air speed can vary up to 60 m/sec.
High-speed hot air ovens
The principle of operation of the system developed and implemented by Colmec is based on the circulation of forced hot air at high speed inside two concentric chambers. The outer area, where hot air circulates at low speed, is called the preheating tunnel because the air in this area is preheated before flowing or flowing back into the inner area by high-capacity blowers. The interior area, where hot air circulates at high speed, is called the vulcanization tunnel where the profile or cable vulcanization takes place. The air temperature can be adjusted up to 400 °C and the air speed can vary up to 60 m/sec
- For sulfur based compounds
- Customizable length with modules of 4 or 6 meters
- Adjustable air speed
- Independent temperature control along the tunnel
- Oven temperatures adjustable up to 400 °C
- Automatic tensioning system of oven conveyor belts
- Tunnel accessibility for internal cleaning by opening side doors
- Great flexibility of use
- Very high efficiency and reduced energy consumption
- Very high reliability and low maintenance
- Simple adjustment for sponge rubber
- For sulfur based compounds
- Power varies depending on the required production speed and profile size
- Instantaneous reaching setpoint temperatures
- Wide adjustment of the desired power value
- Tunnel accessibility and ease of maintenance
- Size of variable vulcanization modules
- High power IR lamps
- Reduced thermal losses
NIR ovens
NIR ovens permit a continuous vulcanization process with the latest generation of near infrared lamps. NIR oven infrared technology allows rapid heating of the extruded profile due to the transfer of energy in the form of radiation of electromagnetic waves without direct contact ensuring very high yields and reduced energy consumption.
NIR ovens
NIR ovens permit a continuous vulcanization process with the latest generation of near infrared lamps. NIR oven infrared technology allows rapid heating of the extruded profile due to the transfer of energy in the form of radiation of electromagnetic waves without direct contact ensuring very high yields and reduced energy consumption.
- Variable power
- Instantaneous achievement of the setpoint power
- Uniform vulcanization and excellent dimensional stability
- No contact markings
- Integrated thermoregulation system
- Total tunnel inspectability for internal cleaning
- For sulfur based compounds and peroxides
- Roller conveyor or conveyor belt. Modules with a length ranging from 5 to 30 meters consisting of a series of rotating rollers that force the profile to be transported while immersed in molten salt.
- The speed of the rollers is adjustable according to the type of profile to be vulcanized.
- The operating temperature of the salt is adjustable up to 280 °C.
- Pre-cleaning station. Module where the first mechanical cleaning of molten salt from the rubber profile takes place.
- The oven can be fully inspected with pneumatic opening doors.
- Washing station. Module ranging in length from 5 to 15 meters where the molten salt is cleaned from the rubber profile by spraying water at high pressure and immersion of the profile in water. This station is complete with recirculation tanks, filling and discharge of contaminated water in automatic mode, system to save the consumption of water, drying unit by blowing high pressure air.
- High productivity
- Suitable for profiles and hose that require vulcanization in the absence of oxygen
- Remarkable flexibility in the production process thanks to the wide range of salt bath temperatures (180 °C – 280 ° C)
- Reduced line length due to the enhanced heat transfer
- Reduced thermal losses.
Hybrid ovens with molten salt and high-speed hot air
This new patented vulcanization system simultaneously exploits the qualities of molten salt and high-speed hot air. The novelty of this system is that it has eliminated the use of rollers and/or conveyor belts to keep the profile immersed under the surface of the liquefied salt. The profile floats on the molten salt and during vulcanization is exposed to high speed hot air. This offers the possibility to vulcanize freely without the use of the conveyor belt or rollers that can cause marking and deformation.
Hybrid ovens with molten salt and high-speed hot air
This new patented vulcanization system simultaneously exploits the qualities of molten salt and high-speed hot air. The novelty of this system is that it has eliminated the use of rollers and/or conveyor belts to keep the profile immersed under the surface of the liquefied salt. The profile floats on the molten salt and during vulcanization is exposed to high speed hot air. This offers the possibility to vulcanize freely without the use of the conveyor belt or rollers that can cause marking and deformation.
- Suitable for complex geometry profiles with sulfur based and peroxide compounds.
- Consists of a bed of molten salt on which the profile floats. The upper part of the latter is instead exposed to high temperature high speed hot air.
- The tunnel can be divided into several units ranging in length from 6 to 30 meters
- The speed and temperature of hot air is adjustable according to the type of profile to be vulcanized as well as the operating temperature of salt, up to 280 °C.
- Pre-cleaning station. Module where the first mechanical cleaning of molten salt from the rubber profile takes place.
- The oven can be fully inspected by pneumatic opening doors.
- Washing station. Module ranging in length from 5 to 15 meters where the molten salt is cleaned from the rubber profile by spraying water at high pressure and immersion of the profile in water.
- This innovative process allows the vulcanization of profiles and/or rubber hose without deforming its geometry
- High productivity
- Suitable for profiles/hose that require vulcanization in the absence of oxygen
- Reduced thermal losses.