Reverse gravure ink usage methods and techniques

Posted on

1. The reverse gravure ink is as rare as water, and the printing technique is the key. When the printing speed is slow, on the one hand, the water-like reverse gravure ink will leak down the screen, on the other hand, the reverse gravure ink is easy to absorb moisture in the air , The mirror effect obtained after printing is not good. For this reason, when printing, the reverse gravure ink must be continuously printed quickly after being poured into the screen to complete the smooth printing. That is, the speed of checking the workpiece while printing will give the printing The effect has an effect, such as blocking the network, the ink can not print, slag on the screen, etc.

2. The tension of the screen is slightly lower, the screen distance is also adjusted closer, and the pressure of the scraper is appropriately reduced, otherwise it will destroy the formation of the mirror reflection effect.
3. The mirror reflection effect of the reverse gravure ink is related to the drying method. As far as the mirror effect is concerned, natural drying is not as good as heating and drying. It is necessary to keep the heating temperature and drying time consistent, otherwise the mirror performance and color saturation will also be Will make a difference.
4. The environment temperature and humidity when printing reverse gravure ink are very important, because the ink is easy to dry on the screen, so it can not be used under air circulation, otherwise it is very easy to block the network, when the air humidity is high, the mirror effect is poor Therefore, avoid air flow and humidity as much as possible.
5. When using mechanical printing, the ink-returning knife used cannot be made of hard aluminum or stainless steel. Instead, a colloidal ink-returning knife should be used to ensure that the reverse gravure printing ink is evenly coated to make the mirror effect uniform.
6. The reverse gravure ink must be fully stirred before use, so that the aluminum powder and the resin must be fully mixed evenly to ensure the appearance of the mirror effect, otherwise, it will affect the production of the mirror effect.

Conveying Machine, in a word, is a kind of machine to convey powder, small particles or granule from one point to another point. There are several different type of conveying machine: From conveying ways, we can distinguish horizontal conveying, inclined conveying and vertical conveyor. From the feeding material continuous ways we can distinguish into: even feeding, batch feeding, volumatic feeding. 


For example, conveying machine include:

Flexible Screw Conveyor: Flexible screw conveyor is flexible, allowing a multiple of configurations to suit application  requirements. The standard unit consists of an inlet, an outlet, a flexible spiral spring, a PPR  hose, a motor and a hopper.

Its design is very simple & eliminates the need for any additional operating equipment such as  filters or bearing. It consists of electric motor driven spiral, which is the only moving part,  rotates within a food grade & sealed tube.The material moves along the spiral within the tube. The unique action of the flexible spiral conveyor eliminates the risk of the product separation  that can take place in conventional pneumatic conveying systems where mixed materials have  components of different densities and particle size.In fact,the conveying action ensures constant remixing.Conveyor maximum length can be upto 15 meters for material bulk density 0.6 kg/ litre and may be increased or decreased inversely with bulk density.Vertical installation are also possible,but carrying capacity  decreases with increase in angle of inclination. Feed hopper is  available in standard size or according to customers specification.


flexible screw conveyor


Vacuum Conveyor: The vacuum conveyor machine can reach the objective that feeding materials with safe and convenient can't cause some dangerous factors for the operators, It mainly consists of vacuum pump(no oil and water),oil and water separator, stainless steel suctiontube, flexible hose, PE filter or SUS316 filter, compressed air cleaning device, pneumatic discharging device, vacuum hopper and automatic level control device. This machine can reach GMP standard and is the ideal feeding to food industry and pharmaceutical industry.

Remarks: we have two kinds of vacuum conveyor machines for electrical vacuum conveyor and pneumatic vacuum conveyor. The working process is almost same, but the electrical vacuum conveyor is replace the vacuum generator for electrical pump. You can choose the vacuum conveyor according to real situation


vacuum conveyor

Conveying Machine

Conveying Machine,Conveyor Equipment,Gravity Roller Conveyor,Bucket Conveyor

XINXIANG CHENWEI MACHINERY CO.,LTD , https://www.sieves.nl