Overview of gravure preprint equipment for the hot

Overview of carton gravure pre printing equipment (I)

pre printing is a new printing production mode in China. The tax revenue of the carton coal industry accounts for nearly 60% of the fiscal revenue at this level. Its emergence has brought a ray of spring to the carton industry. In the case of being generally optimistic in the industry, we hereby invite major domestic carton gravure pre printing equipment suppliers to guide your purchase and selection

pre printing, paper pre-treatment first

Xi'an Aerospace Huayang printing and packaging equipment Co., Ltd.

paper pre-treatment before printing is mainly through pre heating treatment before printing to ensure that the moisture content of the paper is maintained at a reasonable level, so as to avoid poor horizontal registration accuracy during printing and affect the printing quality of the product. The dust, impurities and fallen fibers on the paper can be removed by the dust removal negative pressure air extraction device to avoid the phenomenon of white printing caused by blocking or falling off during printing

some large domestic paper mills have been able to produce paper suitable for gravure pre printing equipment, such as Shandong Taiyang, Ningbo Zhonghua, Foshan Huafeng, etc., but their paper quantity is mostly 250g/m2, and they do not produce low gram weight paper, which makes some advantages of pre printing difficult to reflect. The prepress can easily achieve high-quality printing on 120g/m2 paper

Shaanxi Beiren Printing Machinery Co., Ltd.

paper printing must have certain pretreatment to ensure that the moisture in the paper during the printing process affects the printing quality of the product

first of all, we must make good use of paper. The substrate of gravure pre printing must use coated white paper with good surface smoothness, strong printing adaptability and stable moisture content (6 ~ 7%). The imported coated kraft linerboard and domestic gray bottom whiteboard can meet the paper matching requirements of high-grade color corrugated box face paper. Finnish M-real forestry company is famous for producing coated paper with high hygienic standards all over the world. 185g coated paper has been widely used in domestic prepress machines, and the quantitative range of paper is 150g ~ 350g/m2. Mead paper industry in the United States has been using 500 grams of raw wood pulp to coat kraft linerboard gravure printing cartons and tinned beer portable cartons, with strength higher than corrugated cartons. Secondly, it is inevitable that the paper will regain moisture or lose moisture during storage. Equipped with preheating sealed oven device, strong preheating treatment can reduce the tension change caused by water loss, eliminate the deformation of the coil before printing, enhance the adhesion of the ink, and make the printing products more exquisite. If the moisture is too low, install a humidifier to make the paper reach the specified humidity. If the paper quality is slightly poor and the paper is too dusty, a dust removal device should be added

Xi'an Qinhua Machinery Co., Ltd.

the pretreatment system of paper gravure printing is a process often set on the paper gravure printing machine. The pretreatment system of carton pre printing usually includes three purposes: first, to control the moisture content of the paper in the printing state to reach 5 ~ 7%, so that the paper does not change or slightly change under the subsequent printing process states, and the printing overprint meets the standard; Second, remove the dust and impurities on the paper surface, make the paper surface clean, and print in the subsequent printing state with less dew point and no blocking of the printing roller; The third is to improve the affinity of the printing state molecules on the paper, so that the paper can be inked fully, firmly and without dew point in printing

there are two methods to control the water content of paper in pretreatment: hot air hood heating or front and back large hot rollers heating. The former has high process efficiency, but has a slight impact on the paper micro luminosity, while the latter has low process efficiency, but can maintain the paper micro luminosity better. The process of paper dust removal is usually treated by soft wool roller dust brushing and negative pressure dust suction. For paper of different textures (coated white paper, coated kraft linerboard, etc.), paper of different thickness and gram weight (100g ~ 350g/m2), and paper produced by different manufacturers (Jindong paper, Zhonghua paper, Huafeng Paper and various imported papers), the process parameters set in the pretreatment are different. It needs to be determined according to the specific situation

the complete refueling system enables the preprint to start immediately

Xi'an Aerospace Huayang printing and packaging equipment Co., Ltd.

the structure of yad-51600p unit carton preprint printing machine's winding and unwinding device of aerospace Huayang company includes: independent electric double arm double station rotary frame, automatic rotary positioning control; The tension adopts the dancer roller full closed-loop automatic tension control system; The double unwinding shaft adopts the shaftless pneumatic cone top mode; The synchronous pre drive adopts ABB vector variable frequency motor precision synchronous control, and then outputs and prints various required experimental curves and experimental report system; The paper roll can be adjusted horizontally manually; The pit type hydraulic lifting platform is installed with a discharging coil. The specific specifications are:

maximum width of roll paper core 1650mm

maximum unwinding diameter Φ 1200mm

revolving speed of the slewing frame 0.5r/min

tension setting range 50 ~ 100 kg

tension control accuracy 0.5kg

transverse adjustment range 100mm

center height of the slewing frame 1450mm

slewing frame drive motor 2.2kw+brake

unwinding motor ac15kw+encoder+fan

equipped with VS-616G5 digital vector converter of Yaskawa company of Japan

discharging and connection the structure of the feeding mechanism is: top mounted cutter, synchronous linear speed control feeding; The cutter retraction mechanism, the cutter shutdown self-locking automatic length counting, reaches the setting automatic alarm, reminds the roll change; High speed non-stop roll change, new material shaft automatic pre drive function; Synchronous detection mechanism; New coil diameter detection mechanism; Adhesive tape bonding position detection mechanism; Automatic positioning mechanism of slewing frame. Its specific specifications are:

the maximum paper receiving speed is 120m/min

the paper receiving length is 2m

the structure of the feeding traction part includes: steel roller, rubber roller, double roller, opposite roller type; Pneumatic clutch pressure of rubber roller; The steel roll is driven by ABB vector variable frequency motor; The tension adopts the dancer roller full closed-loop automatic tension control system; The tension of the swing roll is closed-loop controlled by the feedback signal sent by the precision linear potentiometer; The tension adjustment is automatically set by the central controller and implemented by the tengcang low friction cylinder; Double sided dust removal brush, negative pressure waste discharge suction box; Preheat the oven device. Its specific specification is:

steel roller Φ 200mm

rubber roller Φ 150mm nitrile rubber shore (a) 85 ° ~ 90 °

maximum pressure of rubber roller 450kg

tension control range 50 ~ 100kg

tension control accuracy 0.5kg

feeding traction motor ac3.7kw + encoder + fan

equipped with VS-616G5 digital vector converter of Yaskawa company of Japan

maximum temperature of preheating oven 100 ℃

length of preheating oven 1000mm

structure of receiving traction part includes: steel rubber roll double roll counter roll type; Pneumatic clutch pressure of rubber roller; The steel roll is driven by ABB vector variable frequency motor; The tension adopts the dancer roller full closed-loop automatic tension control system; The tension of the swing roll is closed-loop controlled by the feedback signal sent by the precision linear potentiometer; The tension adjustment is automatically set by the central controller and implemented by tengcang low friction cylinder. The new kinetic energy of its specification transformation and development further converges as:

steel roller Φ 200mm

rubber roller Φ 150mm nitrile rubber shore (a) 65 ° ~ 70 °

maximum pressure of rubber roller 450kg

tension control range 50 ~ 100kg

tension control accuracy 0.5kg

drive motor ac3.7kw + encoder + fan

equipped with VS-616G5 digital vector converter of Japan Yaskawa company

material receiving mechanism structure: upper mounted cutter, synchronous linear speed control material receiving; Cutter telescopic mechanism, cutter shutdown self-locking; Automatic length counting, automatic alarm when reaching the setting, and remind to change the roll; High speed non-stop roll change, new material shaft automatic pre drive function; Synchronous detection mechanism; New coil diameter detection mechanism; Automatic positioning mechanism of slewing frame; Its specification is:

paper receiving speed 120m/MI 300000 tons n

paper receiving length 2m

structure of winding part: independent electric double arm double station rotary frame, automatic rotary positioning control; The tension adopts the dancer roller full closed-loop automatic tension control system; The double winding shaft adopts the shaftless pneumatic cone top mode; High speed non-stop roll change, new material shaft automatic pre drive function; ABB vector variable frequency motor precision synchronous control is adopted for synchronous pre drive; The new material shaft can be adjusted horizontally manually; The pit type hydraulic lifting table unloads the finished material roll; Automatic length counting, automatic alarm when reaching the setting, and remind to change the roll; Automatic positioning of rotary handover position; Taper tension setting, taper tension attenuation rate can be set arbitrarily on the human-machine interface screen. Its specification is:

the maximum width of the paper core of the coiling material is 1650mm

the winding motor ac15kw+encoder+fan

is equipped with VS-616G5 digital vector converter of Japan Yaskawa company

the tension setting range is 50 ~ 100kg

the taper attenuation of the winding tension is 0 ~ 100%

the tension control accuracy is 0.5kg

the horizontal adjustment range is 100mm

the center height of the swing frame is 1450mm

the rotation speed of the swing frame is 0.5r./min

slewing frame drive motor ac2.2kw+brake E

Shaanxi Beiren Printing Machinery Co., Ltd.

the unwinding part of the tazj701650 unit type carton prepress of Shaanxi beiren adopts an independent tower double arm double station rotary frame, and the stability of the whole machine is reliably guaranteed; The independent active unwinding form of double unwinding shafts can produce small tension control and stable output. Low friction cylinder detection system is used for tension detection, which can quickly and accurately adjust the tension. The tension closed-loop control adopts the dancer tension stabilization system. Automatic refueling alarm, automatic drive of new coil, and synchronous coil changing at the same speed as the host at high speed without stopping, stable tension, improved efficiency, and low scrap rate. The cutter has a fixed working position, which is self-locking when it is stopped. Place the roll by means of pneumatic cone. Automatic overturning and positioning of motorized slewing transfer position. A prepress processing device is installed on the unwinding wallboard

the drawing part of discharging and receiving adopts the double roll type of steel and flexible combination, which ensures the division of tension sections. The steel roll is driven by a separate motor. The clutch of the flexible roll is linked with the host, which is completed by the central controller, and the pressure adjustment is completed by the qigong element. Independent high-sensitivity tension closed-loop control is adopted to stabilize the printing tension. The tension detection of swing roll is involved in closed-loop control

the winding part not only has all the functions of unwinding, but also has the function of tension attenuation, so that the tension inside and outside the winding is consistent, and there is no vegetable core phenomenon

Xi'an Qinhua Machinery Co., Ltd.

the refueling systems of 850, 1350 and 1650 concave prepress produced by Xi'an Qinhua Machinery Co., Ltd. are high-speed automatic docking head refueling systems. The complete work of the whole equipment refueling system includes coil loading support and clamping, automatic turnover positioning, coil diameter detection, pre speed synchronous drive, belt position detection and indenter cutting, floating roll stabilization system and traction device

its characteristics are that the paper roll is loaded and unloaded by the underground elevator, the reel is retracted and retracted without shaft, the hydraulic centering and clamping, the overturning pre drive and the joint cutting are automatically completed according to the set program. The advanced butt joint system does not produce joint waste, and the smoothness of butt joint has no impact on each printing process. In high-speed printing, there is no deceleration, joint refueling, and no printing waste. The imported floating roller detection closed-loop control system can stably balance and compensate the tension fluctuation and impact caused by rewinding and rewinding. The winding and unwinding traction prevents and blocks the tension fluctuation of winding and unwinding during the whole refueling joint process, and does not affect the printing. The drive of winding traction and winding are both imported Japanese digital vector control system. The complete closed-loop control is carried out through imported Siemens PLC and human-machine interface to make the unwinding work in constant tension and the winding work in taper tension