First, the processing of printing white Printing whiteness is the most common and most difficult quality problem in the production of corrugated cardboard boxes. The causes are: poor ink absorption of paper; dirty printing plates; and scraps and dust on the cardboard. The traditional way to deal with these problems is to manually change the box, or increase the frequency of manual wiping. These methods will play a certain role objectively, but the improvement effect after changing the box is not large, and it is easy to cause a decline in efficiency; wiping the plate will also cause waste of water, electricity, and labor. After long-term observation and analysis, the author believes that in the process of equipment installation, maintenance and management, the key to solving printing dew is dust removal. The main source of dust is generated when the paper is separated by a single knife. Based on this situation, I installed an electrostatic air suction and dust suction device after the computer cross cutter of the cardboard production line and the paper feed section of the printing machine two years ago. Use a blower before the cutter to blow out or blow away the scraps hidden in the pits when the single-piece knife is split, and then use an electrostatic air suction and dust suction device to suck the scraps at the paper receiving rack behind the computer cross cutter go. At the gap between the paper feed rubber ring and the paper feed roller of the paper feed section of the printing press, the dust on the cardboard is sucked away by electrostatic dust, and the quality printing surface is clean and dust-free. Under such conditions, when the cardboard enters the printing roller, ink is applied Barrier-free and uniform ink. After such improvement, the printing effect of the product has been greatly improved, and the phenomenon of printing whiteness caused by dust has been fundamentally overcome. 2. Handling of overprinting Nowadays, product packaging pays more and more attention to the artistic and three-dimensional sense of patterns, so that consumers can feel the perfection of the purchased products from the outer packaging. To achieve this goal, packaging printing must use multi-color printing, that is, multi-color overprinting. In the process of overprinting, there is often a misalignment between the latter color and the previous color or the positioning position, so that the printed pattern cannot reflect the design effect of the product packaging, or even completely different, completely destroying the image of the product. In response to this particular problem, after a period of in-depth investigation and research, the author ’s company conducted a detailed calculation of the electrical control response speed to the mechanical fit tolerance accuracy, made several improvements to the existing equipment, and formulated relevant Equipment maintenance measures. 1. Improve the accuracy of printing cylinder phase positioning The phase positioning of the printing cylinder is controlled by the cooperation of the encoder and the counter. If the precision of the counter is too low, the position of the encoder will be inaccurate and the position will be shifted during printing. Poly? Ounter reflects a speed of 3k, but often has an error of ± 1mm ​​during positioning. After discussing with Taiwan's electronic control company, it produced a 5krcounter to reduce the positioning error of the printing cylinder to ± 0.4mm. 2. Timing lubrication, testing transmission machinery In the paper feeding process, if the transmission machinery cannot maintain a good and balanced operation, the position of the cardboard will change every time, resulting in printing and sleeve positioning, so it is very important to carry out correct maintenance and inspection of the equipment. . It is possible to formulate a daily operation checklist before starting the work, including lubrication maintenance. At the same time, the limits of the amount of wear of the paper feed wheel and paper feed ring are formulated. If they are not qualified, they must be refurbished, re-coated or replaced to overcome the phenomenon of cardboard displacement and skew during walking. 3. Use suction to feed paper The traditional printing machine adopts the upper printing, and only the paper feed wheel can be used to convey the cardboard, while the new printing machine adopts the advanced technology of lower printing and upper suction to convey the cardboard. The suction paper feed uses the wind force to attract the paperboard to the conveying wheel. Its suction force is uniform, not in the position or in the oblique position, and the curved paperboard is sucked flat, aligned during printing, and the ink is more uniform and flat. Third, the treatment of poor printing ink When the ink is not good, in addition to the paper quality and offset problem, there is also the technical problem of the ink roller on the device. The anilox rollers are all made of anilox rollers. In high-standard carton printing, the anilox rollers of more than 250 lpi are used. The mesh holes are most likely to be clogged with ink residues, resulting in uneven ink application and insufficient ink volume. Uneven ink application, insufficient ink volume, black and light, etc. The traditional method is to use clean water to clean the black roller. No matter the method of water scrubbing the ink roller or detergent scrubbing, the effect is not ideal. A new ink roller is less than a month old, and the effect is not as good as before. Through long-term exploration and testing, the company where the author works believes that the following methods can be used to effectively solve the adverse effects of printing ink. 1. Add a filter in the ink tank to prevent the ink particles from being transferred to the ink roller. 2. Periodically (usually half a month) use anilox roller deep cleaning agent to perform circular cleaning. 3. Clean the ink roller with dripping water every day after work, and dialyze the mesh of the ink roller with a magnifying glass of 60 times to 100 times. There should be no residue of ink residue. If local residues of ink residue should be wiped off immediately with a deep cleaning agent.
LPG Tanker Truck (liquefied gas tanker), also known as LPG trucks, LGP transporting tanker and Semi-Trailer. It is used to transport propane, propylene, dimethyl ether, ammonia, methylamine, acetaldehyde and other gases in the Special Purpose Vehicle. CLW GROUP TRUCK Liquefied gas tanker is a pressure vessel, "Pressure Vessel Safety Technology Supervision" promulgated by the State Bureau of Technical Supervision, "Liquefied Gas Tanker Safety Supervision" and GB150 "steel pressure vessel", the use of lightweight design, manufacture of special vehicles. With a reasonable structure, safe, reliable, easy operation, easy maintenance.
CLW GROUP TRUCK LPG Truck It can be modified according to the needs of customers design suitable for liquid ammonia, liquid sulfur dioxide, propylene, propane, liquefied petroleum gas, dimethyl ether, n-butane, isobutane, butene, isobutene, butadiene, ethylene oxide and other large truck part gas.
Lpg Truck,Lpg Transportation Truck,Lpg Tank Truck,Lpg Gas Truck,Fuel Transport Tanker Truck CLW GROUP TRUCK , https://www.clwgrouptruck.net
(1) according to the loading material can be divided into: Propane tank truck, propylene tank truck , dimethyl ether tank truck, ammonia tank truck , methylamine tank truck, acetaldehyde tank truck, etc.
(2) according to the process and the role of loading capacity can be divided into: LPG vehicles, liquefied gas transport semi-trailer, liquefied gas storage tanks. the liquefied gas storage tanks can be designed for two kinds there`s underground storage tanks and ground storage tanks.
CLW GROUP TRUCK Liquefied gas tanker is a pressure vessel, "Pressure Vessel Safety Technology Supervision" promulgated by the State Bureau of Technical Supervision, "Liquefied Gas Tanker Safety Supervision" and GB150 "steel pressure vessel", the use of lightweight design, manufacture of special vehicles. With a reasonable structure, safe, reliable, easy operation, easy maintenance.
Liquefied gas tanker surface corrosion coatings are used sand blasting, painting, purging and other advanced technology.
A liquefied gas tanker truck belonging to a type of gas that a single shipment of a professional body material is strictly prohibited mixed shipment.
Take rigorous scientific construction advanced technology, ensuring a minimum of shrinkage, the highest dimensional stability at low temperatures.
Strict quality inspection: A, Class B 100% weld-ray detection, II level qualified
C, D welds 100% magnetic particle inspection, qualified level
2. There should be tankers with guard personnel, and prohibit other persons aboard. The driver and guard personnel can not smoke in the truck. Tankers allowed towing trailers. Should hang with "danger" signs.
3. The driver can not be launched when loading and unloading vehicles.
4. Interior temperature reaches 40 degrees, the sun should be taken outside the tank or water-cooled cooling hunting and other security facilities.
5. If you need to stop on the way when the tank should be well-ventilated, no fire and buildings within 10 meters of place to prevent exposure. Drivers and escort personnel shall at the same time away from the vehicle. No parking in institutions, factories, warehouses and staff dense areas.
6. LPG leak occurred when a large number of tankers should stanch the emergency, and shall not start the vehicle. And immediately contact the relevant units, departments, cut off all sources of ignition, take timely fire extinguishing measures.