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Main Advantages of the Microwave Heating

  • Speeding up: minutes instead of hours!!
  • Volume Energy transmission - cold vessel
  • ENERGY Savings, Room Savings
  • Efficiency 70%
  • Automatization
  • Safety *
  • Environment *

Comparing to the processes using the combustion


REFERENCES

datasheet
 
 SUMMARY OF ADVANTAGES

Timesaving 
    minutes instead of days 
Improved process control 
    homogenous temperature 
    real-time process control 
Economy 
    minimum time 
    minimum floor space

   minimum heat losses  

PARAMETERS
 
Length  12817 mm 
Width   2500 mm 
Height   4730 mm 
Batch   2 pallets 
1250 kg each  
Microwave power max  96 kW  
Electric power requirements max   160 kW 
Pressurized air  5 to 8 bar 
Weight  11215 kg  
Control system  Siemens Simatic S7 
Certification     as required
MICROWAVE PREHEATING OF NATURAL RUBBER AND RUBBER MIXTURES


METHOD
The conventional method of pre-heating rubber is using a storage room heated to 80C, where the material is stocked for days. Huge energy losses, significant floor space requirements, and difficult production planning are common characteristics of the method. Measurements revealed the following parameters of pre-heating rubber on pallets (800 kg of rubber bales on each pallet in this experiment) using the conventional method without microwaves: 

Room heated to 80C  0 hours  24 hours  72 hours 
Temperature near surface  27C  53C  63C 
Temperature near center  27C  30C  42C 
Temp. homogeneity  1C  23C  21C 
 
The ROmiLL method based on university research and verified with a leading tire manufacturer uses microwaves to transmit the energy. Measurements revealed the following parameters of pre-heating rubber on pallets (1250 kg of natural rubber bales on each pallet in this experiment) using the ROmiLL MW96 microwave line: 

MW96   0 minutes  52 minutes 
Temperature in any point within the material  20C
5C  
60C
5C   


 
EXPERIENCE 
The actual heating cycle time depends on the starting temperature and the target temperature; real life experience from a tire manufacturer shows cycle times about 30 minutes. In extremely low winter temperatures the time of course increases.   
The arrangement with loading and unloading conveyors allows the operator to prepare the next batch already during the heating of the previous batch, so minimizing manipulation times. Throughput in real-life application is 80 metric tons of rubber per day.

OPERATION 
The equipment can be operated by staff without any specific qualification after a brief training, e.g. by a warehouse forklift operator. 
Displayed messages are available in several languages.

INVESTMENT
The equipment is designed for industrial usage and expected long life in 24/7 operation. A significant portion is made of stainless steel. Consumables magnetrons are easy to replace by a trained electrician. Specification of spare parts, if you ever need them, is part of the documentation. The control system monitors proper function of the equipment and reports any deviations. Records (logs) are available with detailed information about the operation. 

SERVICE
The equipment doesnt require any unusual service. However, to ensure maximum satisfaction of the users, the manufacturer offers Service Agreement with guaranteed response times, prices, and preliminary maintenance.