The first commercial graphene product is a conductive ink that can be used in printed circuits and other electronic components. Graphene inks are low cost and very soft and much more powerful than other conductive inks such as nano-metal particles. In order to make the graphene sheet better soluble in ink, a binder is sometimes added to help solidify the ink. This graphene ink must be annealed at high temperatures to achieve its purpose. However, the annealing process can damage the material that prints graphene—paper or plastic surfaces. According to a report by the Physicist Organization Network on May 20th, the researchers discovered a way to increase the conductivity of graphene inks without the need for adhesives. They print first, then dry the ink, and then press it with a roller, just like rolling the new pavement repeatedly with a roller. The experimental results show that the conductivity of the compressed ink is increased by 50 times, and the graphene laminate is also twice as conductive as the graphene ink with the binder. The researchers said: "The high conductivity makes wireless RF radiation more efficient. This is the most exciting aspect of the experiment." Printing electronic technology on cheap and flexible materials such as paper and plastic means that RFID tags and other wireless technologies are more advanced. Everywhere, from a cow to a car part, it can be applied everywhere. At present, most commercial RFID tags are composed of metallic aluminum and copper. The materials are expensive and the manufacturing process is complicated. Graphene-based RFID tags can significantly reduce the cost of materials. The research team has already begun planning to develop graphene RFID tags, as well as sensors and wearable electronics.
Sectional Door Accessories: motor 220V-380V, control box, spring break device, cable break device , aluminum alloy rope pulley, enhanced shaft bracket, air bag system, duplex enhanced guide wheel bracket.
Detail introduction for above main accessories
1.Motor and controller:
The garage door operator is designed for residential overhead sectional and tilt doors.
The operator memorizes the limit positions and unique braking system that slows the unit down at the end of its travel.
Rolling code remote control with max. 20 pcs hand transmitters.
The operator is equipped with a manual release lever which allows manual operation of the door in case of power failure.
The controller has a security LOCK function which prevents operation of the door from transmitter.
2.spring break device:
Sectional doors are hinged and they bend in the tracks as the door opens and closes. Many of these doors are counterbalanced with extension springs, also designated "stretch springs," and they have seven characteristics. The length is the measurement of all the coils pressed together. This, along with the inside diameter of the coils and wire size - the thickness of the wire from which the springs are made - determine the stretch, the distance the spring is extended - normally half the door height, and pull, the force the spring pulls when stretched its normal length. The type of ends determine how the ends of the spring are mounted. The initial tension is the percentage of pull needed to separate the coils. This is determined by the pitch with which the springs are wound. On sectional garage door springs this is normally 15 percent. For example a 100 pound pull spring requires 15 pounds of weight to separate the coils; when a door is open the two springs will support 15 pounds of door weight without any stretch.
Most extension springs are made of oil tempered wire. These are normally coated or painted. Some springs are made of galvanized wire.
3.able break device:
cable break device ,door hardware
adjustable bottom bracket .
the raw material hot plate
zinc plated
safety device
adjustable bottom bracket
the raw material hot plate
zinc plating
spring safety device ,2" and 3" safety device
once the cable is broken ,this devoice can keep the hurt away from the door falling
4.aluminum alloy rope pulley
Equipment: CNC stamping/punching machine, CNC bending machine, CNC cutting
machine, 5~250 tons punching machines, welding machine, polish machines...
Processed material: stainless steel: copper, carbon steel
Surface treatment: Hot galvanized, polishing
Making process:Stamping, deep drawing,bending, punching, laser cutting,threading,
welding, tapping, riveting, grinding
5.air bag system
It is a safety device. When the door is down to hit something, it will up automatically.
Operation pressure:<3mbar
Battery:CR2032*2
Battery lifetime>1 year
Emission frequency: 315MHZ
Emission power:<10mW
Receiver power source:12V
6.duplex enhanced guide wheel bracket
Determining the right type of sectional door roller for your garage door tracks can be a little confusing, especially when you do not know what you need to look for in a garage door roller. To simplify things, there are two primary things you need to be aware of. First are the actual dimensions of the roller, and second is purpose that you will be using the door for. You can read below about measuring your roller and choosing the right quality of material for your door.
Other Door Accessories,Electronic Door Accessories,Automatic Door Accessories,High Speed Door Radar Detector Shenzhen Hongfa Automatic Door Co., Ltd. , https://www.hfautodoors.com