How to skillfully select printing machine lubricants

2. The choice of grease

The type and brand of grease are numerous, and the application is also very wide. To make full use of the grease's performance and achieve the best use effect, it is necessary to understand the characteristics of various greases and the working conditions of the application, lubrication method, change Oil cycle and so on. In detail, it should be considered from the following aspects:

1) Purpose of using grease;

2) Operating temperature of the lubrication area;

3) The load of grease lubrication parts;

4) The speed of the lubrication part;

5) Lubrication site environment and contacted media;

6) Grease filling method;

7) The cost performance of grease lubrication;

8) Refer to the "Using Imitation Sheets" for printing equipment.

Only fully considering these aspects can make full use of the lubricating properties of grease to achieve the best lubricating effect. At the same time, the amount of grease is also very important, not as much as possible, less grease will cause damage to the lubricant film, temperature rise is too high, the lubrication condition deteriorates; too much grease will play a sealing role, but easy to cause Excessive friction and excessive temperature rise. Therefore, it is necessary to properly fill the amount.

The first fatliquoring of different types of bearings can be estimated by:

A=0.01×d×B

Where: A - fill volume (mm2);

d - bearing inner diameter (mm);

B - bearing width (mm).

Many lubricants and greases now contain additives. Adding small amounts of additives can improve the properties of oils and even give them new properties. Different additives can improve the different characteristics of oil products, so oils with different additives need to be selected for different working conditions and different environments. Gas, solid lubricant

The gas can be a lubricant like oil, its viscosity is very low, and the film is very thin. Lubricating gas can be air, helium, nitrogen, hydrogen, etc. The printing machine generally uses air. For example, Feida in the offset printing press uses air to separate the paper to avoid adhesion between the papers. The triangular section of the folding section of the rotary machine uses air to suspend the paper on the triangle to ensure that the machine will not run at high speed. Rubs against the triangle to reduce print quality.

In the printing equipment, some solid lubricants are also used, which use solid powders, films or some monolithic materials to reduce friction and wear between two relatively moving bearing surfaces such as graphite, fluoride, nylon, and the like. Solid lubrication is a new lubrication technology and its development prospect is very broad.

Lubricant material management

All kinds of lubricants have imitations, generally delineated its composition, physical and chemical indicators, the use of temperature range, to adapt to the premise of work. Users can choose the appropriate lubricant accordingly.

1. Lubrication management

Lubrication management is an important component of the printing equipment management. Without scientific methods of governance, the normal lubrication of printing equipment cannot be guaranteed. The staff responsible for lubrication and management must grasp the knowledge of accurate use of lubricant materials, use the right amount of oil, proper refueling method, timely oil change, and proper transportation and storage. The detailed practice of strengthening lubrication management has the following points:

1) Establish a sound lubrication management organization. Lubrication of general printing equipment is under the responsibility of the Equipment Division, which is staffed by a full-time lubrication technician, who is supported by the Supply Section and the Maintenance Section.

2) Establish a sound printing equipment lubrication management system. Such as the lubricating material procurement system, oil depot management and safety fire prevention system, etc., clearly defined responsibilities and implementation.

3) Strict procurement governance. It is required that the purchasing staff should not only understand the printing equipment, but also understand the functional characteristics of the lubricating material, and then consult the lubricating material production unit in order to purchase the appropriate lubricating material.

4) Strictly check and accept. The printing oil depot must establish a strict oil acceptance system.

5) Avoid oil contamination by dust, sand, and moisture during storage.

6) Accurate distribution use. To prepare oil cards for printing equipment, use and issue oil products according to the lubricant cards. The refueling staff should pay attention to checking the signs outside the oil containers and must be filtered. Adhere to regular oil changes, oil testing should also be strictly enforced in accordance with the lubrication card.