Thick Film Furnace with Water Cooling

• After-sales Service: 12 Months
• Warranty: 12 Months
• Type: Thick Film Firing Equipmet
• Certification: CE
• Structure: Horizontal Type
• Brand: Hengli
• Model NO.: HSK9105-1111Z
• Max Temperature: 1050c
• Belt Width: 915mm
• Belt Material: Cr20ni80
• Heating Element: Heating Board
• Firing Atmosphere: Compressed Air
• Transport Package: Wooden Box Iron Bracket
• Specification: 10980*1700*1350mm
• Trademark: HENGLI
• Origin: China
• HS Code: 8514390090
• Production Capacity: 800 Sets/Year

Product Description

  HSK9105-1111Z Thick Film Firing Furnace

• Main Application:

This furnace is designed for thick film products firing, such as Hybrid IC, chip-R, SMD components terminal, LTCC, Stainless steel heater, PV thin film cell and other similar products.  
,Technical Specification:

1. Max Temperature: 1050ºC,Rated Temperature: 850ºC
   1. The Effective Height of the Product: ≤50mm
   2. Belt Width: 915mm
   3. Belt Material: Cr20Ni80
   4. Max Load on the Belt: 50Kg/m²(exclude the belt weight)
   5. Drive System: Big wrap angle friction drive.
   6. Belt Speed: 60~300mm/min(design belt speed 165mm/min), Stepless speed regulation control with serve motor.
   7. Heating Element:Use heating board 
   8. Firing Atmosphere: Compressed air.
   9. Atmosphere Control: 5 compressed air inlet pipes. (please see 3.2 for details)
   10. Exhaust System: there are one group of exhaust stacks in pre-heating section.(please see 3.2 for details)
   11. Cooling Mode: Water cooled, stainless steel sheathed external cooling water pipe.
   12. Belt cleaning: ultrasonic cleaning and brush cleaning
   13. The Layout of Furnace Structure: Please see the no. 3.1  
   14. Temperature Control Stability: ±1ºC
   15. Chamber Temperature Uniformity: ±2ºC(Flat Temperature 850ºC)
   16. Temperature Zone: 11 Zones.
   17. Temperature Control Point: 44 points. (Temperature control at left, right, right and middle 4 points in each temperature zone.)
   18. Thermocouple: K type
   19. Emergency Stop Button: There are two emergency stop buttons at the entrance and exit of the furnace.
   20. Alarm Protection: over temp, belt slip, overload, thermocouple failure, high gas pressure, low gas pressure, and other audible and visual protective alarm
   21. The Consumption of Compressed Air: 40~50m³/h.
   22. The Working Pressure of Compressed Air: 0.5~0.6MPa(two stages pressure regulator in the general gas inlet)
   23. The Temperature of Furnace Surface:
   24. The Temperature of discharge product: <65ºC.
   25. Heating Power: 88Kw.
   26. The Insulation Power of the Empty Furnace: ≤30kW.
   27. Power: Capacity >120KVA,   3   Phase   5  Line, Single Phase Voltage:  220 V Voltage between phases 380  V Frequency  50  HZ, the cable's color: live wire:      ; ground wire:      ; zero wire:       
   28. Weight: About 5900Kg.
   29. Overall Dimension: 10980×1700×1350mm (L×W×H).
   30. Furnace Appearance: outside panel uses high temperature spraying coating. White color.

,General Description
The furnace is divided into four major sections: furnace body, Atmosphere control system, temperature control system and drive system.  
  
3.1 Furnace Body Design
Please see Table 1 and figure 1 for detailed layout of the furnace structure.

Figure 1:Furnace Layout Drawing
 

Table 1
No.	Name	length	Note
A	Total Length	10980mm
B	Load and Unload Table	600mm	The length of load and unload table is the same.
C	Furnace frame	9780mm
D	Entrance Transition Zone	350mm	Include entrance curtain (multilayer stainless steel sheet).
E	Entrance Insulation Transition Zone	150mm	Ceramic fiber insulation
F	The Heating Zone	3630mm	11 zones, the length of each zone:330mm, the power of each zone: 8KW
G	Cooling Zone	900mm	No heating elements, Insulation material
H	Exit Insulation Zone	150mm	Ceramic fibre material thermal transition
I	Cooling Zone	4600mm	No isolation material, one point water temperature detection
J	Furnace Height	1250mm	Exclude the exhaust stack height
K	Equipment operation panel position

3.2Atmosphere Control System Design
There are 7 atmosphere pipes: The air flowmeter in entrance and exit curtain is 48 to 480 l/min, the range of the venturi exhaust flowmeter is 10 ~ 95L / min ,others is 24~240L/min. Please see the Figure2 and table 2 for detailed gas layout.



Figure 2:Gas Layout Drawing
 

Table 2
Code	Name	Explanation
A	Entrance Curtains	Prevent outside air from entering the chamber
B	Burn off left Gas Inlet	Used for normal air supplement of heating zone, gas inlet has left and right one.
	Burn off right Gas Inlet
C	Venturi Exhaust Gas Inlet	Two gas inlet used for Venturi exhaust. The chimney adopts variable diameter venturi assisted exhaust chimney.The air amplifier  on Venturi exhaust tube can be used for adjusting gas flow.
D	Firing Zone left Gas Inlet	Use for controlling gas flow direction to prevent the glue pollute the product. gas inlet has left and right one.
	Firing Zone right Gas Inlet
E	Exit curtains	To prevent outside air from entering the furnace to ensure that the product of the firing process requirements
The actual gas flow of each pipe can be displayed by flowmeters

3.3  The Design of Temperature Control System

1. Temperature Measuring: use K type thermocouple independent measuring and control on the temperature control point of each zone.   
2. Temperature Control: use imported temperature controller, with high temperature upper limit alarm and low limit alarm, thermocouple failure and other protective alarm functions.
3. Control Mode:Solid State relay zero cross trigger mode.
4. Over Temperature Alarm: when over temperature occurred in some zones, over temperature alarm system in corresponding zones immediately send audible and visual alarm signal and meanwhile the heating of this zone is cut off, the buzzer sounds alarm.

3.4 Drive System Design
3.4.1 Drive Control uses the serve motor to control the speed by gear box. The speed is adjustable continually.
3.4.2 Belt conveyor device: to drive the driving and driven wheel through chain and sprocket wheel, and then generate the friction force by driving wheel and the belt drive the belt running. There is a belt deviation guide device on the both sides at the entrance and exit.
3.5 Computer System
3.5.1  Use DCS(Distributed Control System) control system,Single-loop intelligent instrument controlling and industrial PC monitoring
3.5.2  Friendly interface,
3.5.3  Multiple program storage, easy for editing and reusing
3.5.4  Real-time display of furnace temperature, gas flow and servo alarm condition. Data can be stored and printed out
3.5.5  Computer control system with automatic heating function, when the monitor is turned on, the temperature raised at the set temperature gradually, effectively extending the service life of the muffle.