Air flow in oven for shoddy felt
Air pressure in one side + air vacuum in the opposite is the clue of webs bonding
Air flow direction could be easily adjusted following the product
Optimal bonding of the web is obtained by a combination of positive pressure in one side and negative in the opposite. In this way all air moved by the fan is forced to penetrate totally the product and therefore it reaches a fast and uniform bonding. Bombi Meccanica developed unique system to distribute homogenously the air from left to right, thanks to specific nozzles where the air pressure is equalized and well distributed. This permits the correct bonding is any working width, with installation made up to 5,5 m wide. In order to work with any kind of web with different weight and density, the sense of the air could be adjusted by the operator in easy way : or manually or electronically from the control panel. Air can be distributed top to bottom, bottom to top, or alternate way.
Web thickness regulation
Webs coming from a carding + cross lapper system or from an air lay must be protected and controlled in thickness,
in order to meet final user demand. For this reason a fiber bat is held between two conveyors, before to enter into
the oven and all along the process . In this way the top belt will prevent fiber movement and will adjust final thickness.
Belts distance is regulated gradually in various points, with motor driven screw jacks. They are controlled from the touch panel so the operator can adjust easily in any moment following the final product. The compression is gentle and gradual, thanks to various points of regulation located along the oven length.
Motor driven screw jacks
Motors for belts distance adjusting are located out of the oven in clean and cold atmosphere.
Following the products our oven could install different belts and different combinations. our great experience guide us in the choose of various materials and mashes fiberglass ptfe coated, steel, pps, peek, duofill , hybrid are among the more common used type.
Easy to clean filters
For no stop production
Air stream may remove fibers and dust from the web and they will reach burner zone with risk of contamination, burner damage, fire.
To prevent this, air flow is continually filtered before reach the burner at each cycle. Each burner has 3 set of filters that could be cleaned from outside of the oven, without doors opening.
Oven is equipped with various doors that are used to access to the internal parts, for cleaning and maintenance. The sealing of the smoke is made with silicon gasket. To get the optimum sealing the doors are equipped with 4 locks (2 on the left, 2 on the right). These, jointed with special hinges permit a parallel movement of the door that will close perfectly with oven frame.
Production site, located in any place of the world, is connected via internet with our systems in Italy. Customer is assisted in real time for any kind of problems, modifications, future adding without the need to send locally a technician.
Bombi Meccanica developed 3 steps for heat recover, accordingly with customer needs and local enviromental.
They can be retro-added in any ovens.
Ovens specific to produce hard pads from shoddy and PP fibers or with phenolic powder. Equipped with steel belts, heavy type. The oven is equipped with high flow and high pressure fans which force a large volume of the air through the material, even through very heavy webs. After oven one compressing calender is installed to compact the felt.
ENTRY ZONE : it will contains various belts mechanism, that will remain in cold atmosphere
SECTION 1 : equipped with fan, burner, filters
SECTION 2 : equipped with fan, burner, filters
SECTION 3 : equipped with fan, burner, filters
SECTION 4 : number of sections following the production
EXIT ZONE : it will contains various belts mechanism, that will remain in cold atmosphere
AIR EXHAUST FAN : to remove smokes from oven
COOLED CALENDER : to compress the web in exit from the oven
FAN OF THE SECTION : at variable speed
BURNER OF THE SECTION : industrial type, world wide assisted and equipped with filters
FAN OF COOLING SECTION
|FIBERS||Recycled fibers, shoddy, PP, BiCo, Phenolic powder|
|WEB THICNESS BEFORE THE OVEN||Up to 1.500mm|
|WEB THICNESS AFTER THE OVEN||Up to 100mm|
|PRODUCTION SPEED||Up to 30m/min|
|HEATING||Direct gas burners (with natural or lgp gas), thermal oil electric|
|OVEN SECTION LENGHT||3.300mm|
Lines specific to produce hard pads from shoddy and PP fibers. Equipped with steel belts, heavy type. The oven is equipped with high flow and high pressure fans which force a large volume of the air through the material, even through very heavy webs. After oven one compressing calender is installed to compact the felt. After calender and air cooler is provided. Line could produce pads or rolls.
Options available on request:
Inversion of air flow from control panel
Closing of the air on the sides of the web from control panel.