The development of the printing industry has gradually changed from a relatively simple letterpress printing method to the commonly used offset printing and the growing digital printing model. The belief behind the promotion of this development model is of course based on the manufacturers' demands for continuous improvement of production efficiency and product competitiveness and quality in the market.
Therefore, printing and other processing machinery and equipment of various manufacturers 'production targets are constantly appearing on the market at a speed of one day, matching and exceeding the manufacturers' expectations. However, when these advanced machines are moving towards production targets day and night, many "small problems" related to operation will also appear, such as maintenance.
When the machine is damaged, the manufacturer generally thinks it is caused by normal operation wear. However, today's machinery is made of high-quality alloy steel and should be usable for a long time. Afterwards, after painful lessons of constantly paying huge maintenance fees and delaying production, manufacturers gradually began to discover the important role played by the maintenance materials team in maintaining the normal operation of printing machinery. Related chemical products are relatively neglected. Probably because of the correct selection of these materials, it will not cause an immediate adverse impact on the manufactured products produced by the manufacturer. Mechanical equipment is often found to have problems after being used for a long period of time.
Therefore, suppliers who provide these maintenance materials must:
1. Its products can reduce the number of mechanical damage and extend the service life of the machine;
2. To provide a multi-functional product line, in addition to adapting to more machine requirements, it can also reduce unnecessary excess inventory of customers;
3. Teach customers to avoid wrong use of maintenance materials;
4. Make customers simplify procurement procedures, thereby streamlining management procedures and saving precious human resources;
5. Frequently maintain sufficient product inventory to save time for manufacturers to order goods and avoid the risk of downtime caused by the casual use of general "temporary substitutes";
6. Through a network of reputable suppliers, provide a long-term and stable supply channel to meet the needs of customers around the world for quality products and services.
The maintenance materials for printing presses and related equipment include:
Lubricating oil-such as snow oil, chain element oil, pressure gear box oil, etc.
Cleaners-such as post-cleaners, ink roller cleaners, oil pipe and oil line cleaners, etc.
Anti-rust agent-used for anti-rust lubrication of the table and cutter of the paper cutter.
Characteristics and uses of grease
In this issue, I will first introduce you to "Grease" (Snow Oil). The type of grease can be roughly classified according to its hardness, pressure feedability, dropping point, water resistance and stability.
hardness
Hardness, or penetration, is a measurable characteristic that must be considered when selecting an appropriate grease. The hardness of the grease is determined by the number, No. 0 is the softest, and then increases to No. 6 with No. 1 and No. 2. The hardness of No. 6 is the same as that of soap bars. The mud in the garden is easy to shovel and is hard to shovel. The hardness of the grease is the same. It is graded according to the penetration depth of the grease from a certain height. Printing machinery must add appropriate hardness grease in accordance with the requirements of the printing machine manufacturer, otherwise it may cause insufficient lubrication or increased resistance to the machine parts.
Pressure feed
Another feature of grease is the ease of pressurized delivery; in the central grease supply system, two kinds of grease that are also easy to press at normal temperature, and the pressure feedability is often very large in a lower temperature environment different.
The difference comes from the types and proportions of lubricants and soaps contained in the grease. Some printing machinery and nailing equipment use the central grease supply system as the lubricating machine components. Therefore, it is extremely important to select a grease with excellent pressure feedability.
Drip point
Because the grease contains different soap bases, different greases will melt at different temperatures. The dropping point is the temperature at which the grease changes from a semi-solid to a liquid; most of the calcium soap grease melts at 160-210 ° F, sodium soap grease 350-350 ° F, and lithium soap grease 350-400 ° F, so the It is better to use sodium soap or lithium soap. Nowadays, most printing machines have very high speeds. Due to the high number of bearing revolutions in motors, the bearing temperature also increases accordingly. The use of higher flow point grease can make high-speed motor bearings such as "carbon pumps" "Bearings etc. have better protection.
Water resistance
Regardless of whether it comes into contact with water, some greases still need to perform their lubrication, so their water resistance is an important property. Calcium soap and lithium soap based grease are insoluble in water, while sodium soap grease is soluble in water, so it cannot be used as a lubricant that may come into contact with water. The printing process requires mixing of water, so some bearings must be protected with water-resistant grease, otherwise, the service life of the bearing will be greatly reduced.
stability
Some of the grease can maintain its original hardness after being added to the bearing, which means that the stability is very high; this grease can soften after working in the anti-wear bearing for a period of time, and will flow from the bearing if there is no good seal. come out. During the printing process, the powder spraying is continuous and has great coverage. If the used grease has poor stability, it will cause pollutants to easily enter the bearing and various components, causing great damage to the printing machine.
Traditionally, the design and production of lubricating greases have only focused on dealing with the single problem faced by mechanical equipment. Such as high temperature, high speed, high pressure or wear resistance. Since then, due to the requirements of machinery manufacturers and the increasing competition in the market, the production of grease has gradually moved towards multi-functional direction. However, general petroleum products always have their limits of use, and they have not been able to effectively meet the rapid development requirements of modern production equipment. Although choosing the right lubricant is not an easy task, there are also some professional lubricant suppliers in the market that can provide professional data and long-term after-sales service, in order to reduce customer errors in use and avoid wasting precious time and money. You may wish to listen to the opinions of the industry and believe that it will help protect the good performance of the printing press.
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