Continuous Hot Bending Furnace for Car Glass Windshield

1. PURPOSE/DESCRIPTION OF PROCESS

The bending process determines the shape of the glass and it's also a key process in the production of laminated glass. Hot bending is a semi-finished laminated glass that is hot-bent into various shapes with a bending die and annealed. It is generally carried out in a bake-bending furnace. The bake-bending furnace is generally divided into upper and lower layers. The upper layer is used for preheating and bending. The lower layer is used for annealing and cooling, to remove the mold.

This Continuous hot bending furnace for car glass windshield is the equipment for producing the front windshield laminated glass.
By arranging the annealing zone on the upper layer of the furnace structure and combining it with blowing annealing to the four peripheries of the glass plate, the annealing effect can be improved, which is beneficial to increasing the compressive stress at the edge of the glass plate and reduce the tensile stress at the edge of the glass plate, so that after annealing The tensile stress of the glass plate is controlled below 8MPa, and the compressive stress can reach above 10MPa.

2. APPLICATION

Hot bending the Laminated windshields for trucks and buses.
 

3. PRODUCTION CAPACITY

The processing speed for FZBF-C-2112: 480 PCS/8 HR (Customized)

4. DESCRIPTION 

• Furnace body adopts frame structure, divide into twp layers. In total 16 furnace bodies.
• Trolley adopts box pile construction, the bottom hollow out, total 30 trolleys. The transmission mode of the trolley is furnace out transfer.
• The glass after bending adopts the substrate out furnace method. side out furnace and glass loading in the same site, as side out of the furnace.
• Glass out of furnace from the side and then adopt overturn unloading method to unload.
• If the hoist can drop to the ground, remove the artificial board.
• The annealing method adopts substrate corrugate pipe, a total of 5 areas.
• The cooling method adopts substrate convection and air quick cool, a total of 6 areas.
• Equipped a set of mold pushrod mechanisms in the molding area, satisfy the repeatedly use of molding mold
• Control system

The transmission action, heating wire, fan annealing, and cooling are automatically controlled by PLC and computer. The transmission and fan's speed frequency are adjustable.
HMI adopts a high-level language program.
Glass is heating synchronous, each trolley the heating furnace silk power can adjust independently.
Heating furnace silk has the break line automatically measuring ability.

The transmission and lifting mechanism adopts the motor and gear rack(or chain) method driven.
The furnace body structure adopts a Q235 square tube, the out frame painting white. The trolley adopts a Q345 square tube, out frame painting high-temperature oil paint.
The thickness of the furnace body keeps warm cotton is 75mm, The inlayer 50mm cotton made in China, and The out layer 25mm cotton is imported. The trolley keeps warm thickness is 50mm and adopts Aesop cotton.
Furnace wire distribution
Top heating furnace wire:
1-3 Area: Each area total of 30 furnace silks, Each silk heating power is 3.3KW, distributed single row, and bilateral symmetry control. The heating power adjust scope is:0-100%(each 10% is a level), The highest temperature can reach 600ºC

4.2  Process flow of Bending Furnace
Glass loading => Pre-heating, pre bending => Bending => Annealing => Cooling => Transition area Glass separate from mold => Glass transfer out of furnace => Glass unloading

4.3 Technical Parameters

• Automatic Glass Loading System (Or manual operation)
• Automotive Glass Washing Machine (Curved Windscreen)
• Cooling Tunnel After Washing (Before windshields PVB lamination)
• Automatic Transfer Conveyor 
• Automotive Glass Laminating Line (2 Glass sheets with PVB)
• PVB Shaping Machine (Automatic stretching and cutting for windshields PVB)
• Automotive Glass De-Airing Line (Laminated glass vacuum ring line)
• Rear Mirror Button Bracket
• Autoclave (We don't manufacture it)

7. OUR SERVICE

7.1 Pre-sale Service

FUZUAN's professional technical team will provide you with an all-around and timely service before making the final decision. It includes,

• Help the customer choose the most suitable glass processing machines, automotive tempered or laminated line machines, according to the target market and production volume requirements.
• Help the customer choose the materials, related to the automotive glass field, such as the raw glass material, mirror button, rubber ring, wiper seat connection, etc.
• Help the customer arrange all the automotive glass processing machines in the workshop.
• Arrange visits to other glass processing companies.

7.2 After-sale Service

FUZUAN will provide you with a complete and systematic after-sale service, which can deliver its technology service quickly to reduce equipment
malfunction possibilities and shorten downtime. It includes:

• On-site installation and training.
• English manual and Video for machine use and maintenance.
• 1-year warranty period (except wearing parts), life-long maintenance.
• Via remote service, faults can be immediately localized and targeted actions initiated.
• 24 hours technical support by email skype or WhatsApp.
• High-quality spare parts increase the lifetime of your machine, secure efficiency, and smooth production. We provide you with a reliable spare parts service. Fast and on-time delivery is our top priority.