What do you know about hinges?

Q1 What are the functions of hinges?

The main function of the hinge is to suspend the door support to achieve the free rotation of the door. Some special types of hinges, to achieve some additional special functions, such as wire hinges, self-closing hinges, etc.

Q2 What types of hinges are available?

Hinges are divided according to different categories and can be divided into:

a. Adjustable hinges and non-adjustable hinges

b. Removable hinges and non-removable hinges

c. One-way hinges and two-way hinges

d. Fireproof hinges and non-fireproof hinges

e. Open-mounted hinges, recessed hinges and concealed hinges

f. Hinges for steel and wood doors, hinges for narrow frame profile doors and hinges for all-glass doors

g. jack-up hinges, anti-theft hinges, medical hinges, over-the-line hinges, etc

Q3 What are the main performance indicators of the hinge?

The most important performance index of the hinge is the load-bearing performance, and the load-bearing performance index is generally 10Kg as a grade unit. Other performance indicators of the hinge are service life, corrosion resistance, etc., according to different standard systems and test methods, there are different indicators. For example, in the European standard, there are requirements for the amount of deformation after life test; As well as more stringent requirements for resistance to elastic deformation and plastic deformation.

Q4 Is the bearing capacity of the hinge related to the size of the hinge?

The physical size of the hinge is related to the bearing capacity of the hinge. In general, the value of the hinge height, hinge shaft diameter and sheet thickness will be larger for the hinge with high load-bearing performance.

Q5 Why is the hinge greased?

Some structures of the hinge, in order to lubricate the hinge core and reel, reduce friction, need to add grease between them; In addition, in the case of insufficient processing accuracy, the gap between the hinge core and the scroll is large, and the hinge sheet shake is large without adding grease, so grease is added to compensate.

Q6 Why does the greased hinge, after a period of use, have black grease leak out?

After a period of operation, the viscosity of the oil added inside the hinge is reduced and it is easier to flow out; At the same time, the hinge core and the scroll, will produce different degrees of wear, wear is more serious, produce more black iron powder, the oil black. Therefore, the greased hinge, depending on the use of oil and processing accuracy, or sooner or later there is transparent or black grease outflow, affecting the appearance to different degrees.

Q7 What are the effects of the use environment on the hinge?

Depending on the use environment, the requirements for hinges are also different. For example, in large public buildings, the frequency of use of doors is very high, and the size of the general door is relatively larger, so it is necessary to choose hinges with high load-bearing performance and long service life. For example, in the application of seaside or storage of certain chemicals, there are higher requirements for the corrosion resistance of the hinge, and special materials or corrosion resistant surface treatment of the hinge need to be selected.