Established in 2001, Dongguan Haichang Hardware & Rubber Co., Ltd. is a professional manufacturer of various industrial rubber rollers and printing machinery rubber rollers. Over the years, relying on strong technical force, advanced mechanical equipment, scientific management mode and the spirit of pragmatism and refinement, with the aim of integrity and quality, the market share has been continuously expanded, and it has been well received by users.
Dongguan rubber roller common problem analysis and answer
I. Summary:
Established in 2001, Dongguan Haichang Hardware & Rubber Co., Ltd. is a professional manufacturer of various industrial rubber rollers and printing machinery rubber rollers. Over the years, relying on strong technical force, advanced mechanical equipment, scientific management mode and the spirit of pragmatism and refinement, with the aim of integrity and quality, the market share has been continuously expanded, and it has been well received by users.
The rubber roller produced by our company has excellent formula, superior materials and advanced technology. The product includes: ink roller, water roller, alcohol water roller, ink roller, polishing roller, oil roller, paper roller, laminating roller, film blowing roller, gravure roller (copper roller), offset roller, paper roller, Printing and dyeing roller, circuit board acid-resistant roller, circuit board high temperature roller, shoe composite roller, hardware, wood machinery and other rubber rollers, its performance: corrosion resistance, acid resistance, alkali resistance, wear resistance, oil resistance. It is resistant to tearing, high temperature, water, anti-static, anti-fouling, elastic and long-lasting. It can well meet the color printing, carton printing, plastic bag printing and printing and so on.
The company has always been "customer first, quality first" as its purpose, "professional to do better, service and thoughtful" as the company's quality policy, "reputation-based, service sincerity" as the operating policy. With this, we will continue to improve and make unremitting efforts. Adhering to quality, advanced equipment, professionally designed and timely service is our commitment to every customer.
Second, the common problems of rubber roller use:
Printing rubber roller is one of the main components of the printing system of the printing machine. The main materials are natural rubber, nitrile rubber, silicone rubber, polyurethane rubber, etc. The middle and high grades are generally selected from polyurethane glue. In the process of use, the printing rubber roller often has problems such as surface crystallization, calcification, scratches, numbness, ink emulsification, premature cleavage, aging and the like. Why do these problems occur, how to avoid problems, in other words, and then extend the service life while ensuring the quality of printing?
We know that printing rubber rollers should have good ink absorption and ink transmission. Generally, the surface of high-quality rubber rollers is usually fine and smooth, and the hand feels slightly sticky. However, because the rubber roller has to be in constant contact with water, ink, paper, etc. for a long time, although we emphasize that it needs to be cleaned every time, due to human factors, cleaning and maintenance cannot be completely thorough, which causes various substances to accumulate layer by layer. The surface of the rubber roller will close the original capillary pores on the surface of the rubber roller to form a smooth crystal layer similar to calcium, which seriously affects the ink transfer and water transfer performance, and thus can not stably control the ink color of the print. In order to solve this problem, some users may use special starting paste and effluent water to clean, but this method is a bit time consuming and laborious, and invisibly increases the production cost, and the effect is not very satisfactory. A better way is to wash with a little citric acid water after each wash, so that some calcium impurities on the surface of the rubber roller react chemically to form a soluble substance for cleaning.
During the operation of the printing press, if the "large water ink" produces ink emulsification, a hydrophilic foundation is formed on the smooth rubber roller, which will deink the ink. The solution is to remove the emulsified ink, wash the deinking roller with gasoline, mix it with 5% sodium hydroxide solution and pumice powder, and polish the hard roller with fine water sand in the state of water spray. Mainly to do a good job of ink and water balance, control the pH value of the water bucket.
The printing roller is prone to scratches because the rubber roller is relatively soft, and a slight hard object will be scratched during high-speed operation. In particular, the alcohol dampening solution is pressed against the plate water roller, and once scratches occur, it can no longer be used. There are two main reasons: one is that the printing plate is not tight or the clip is not tight, the printing plate often has cracks and cracks at the tip of the printing plate, scratching against the plate water and the ink roller; second, the ink roller maintenance is not timely. . The rubber roller has been used for a long time, and the chemical is eroded, which is not timely maintained, causing the rubber to lose the "slag". There are many impurities such as ink and ink residue on the rubber roller, which accelerates the friction, heat and aging of the rubber roller, and makes the surface of the rubber roller full of numbness, if the use seriously affects the quality of the printed product. Find out where the problem lies and the way it is resolved is naturally clear.
In order to ensure that the production does not affect the production, improve the product quality, reduce the production cost, so that the rubber roller does not crack and age early, the dry oil in the ink can not be used excessively. Once excessive, the ink will dry on the rubber roller; The cleaning agent should be properly selected, and the impurities on the rubber roller should be thoroughly cleaned during cleaning. The ambient temperature of the workshop is high. If the dampening system is not working well, it will cause a large amount of heat generated during the operation of the rubber roller to be dissipated in time. The cohesive temperature of the rubber roller is very high; the performance of the rubber roller bearing is not good, and it is rotated by the ink roller. The occurrence of beating friction, extrusion, etc. will prematurely accelerate the cracking and aging of the rubber roller. For large generators, the motor will generate a lot of ozone, which will cause the rubber roller to split and age, and should also be stored in these places.
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