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Ou Y.,Hunan University | Zhou C.,Hunan University | Du G.,China Tobacco Machinery Technology Center Co.
Tobacco Science and Technology | Year: 2014

For improving tobacco rods transfer, an analytical model was established based on the movement of transfer from spider to transfer drum in PROTOS2-2 ultra-high-speed cigarette maker, and a numerical model was also developed by adopting virtual prototype motion simulation technology, to output the trajectory curves of motion. By contrasting the movement trajectory obtained from the analytical model with that of numerical simulation model, the numerical simulation model was validated. According to the numerical model, the rod transfer was analyzed by comparing the relative displacement and relative velocity of the rod passage centers of active/fixed hands against that of the inside/outside rod passage centers of the suction carriers on the spider. The results proved that the system provided a gentle transfer of tobacco rods to the transfer drum.


Hu B.,Hunan University | Zhou C.,Hunan University | Ren Z.,China Tobacco Machinery Technology Center Co.
Tobacco Science and Technology | Year: 2015

To provide a theoretical basis for optimizing its performance, the kinematic characteristics of foil-wrapped cigarettes pusher device in the new type ultrahigh-speed packer were studied. Based on the analytical model of the pusher, the movement trajectory of its working point was calculated by analyzing its working principle. By referring to the dynamics theory of multiple-rigid body, a simulation model was established for determining the movement trajectory of its working point. The trajectory obtained by the analytical model was compared with that by the simulation model, the two agreed pretty well, it confirmed the correctness of the dynamics simulation model. The key kinematic characteristics, including displacement, velocity and acceleration of the pusher were analyzed with the simulation model. The acceleration of long-arm pusher was tested and compared with the results of simulation calculation. It was proved that the pusher device could accurately moved along the preset trajectory and gently push foil-wrapped cigarettes into the reciprocating mandrel at the speed of 1 000 packet/min. ©, 2015, Editorial Office of Tobacco Science and Technology. All right reserved.


Zhou B.,China Tobacco Machinery Technology Center Co. | Chen W.,China Tobacco Machinery Technology Center Co. | Zhao Z.,China Tobacco Machinery Technology Center Co. | Sheng H.,Changde Tobacco Machinery Co.
Tobacco Science and Technology | Year: 2014

In order to study the principle and characteristics of the cutoff system in new type cigarette makers, a mathematical model of the four-linkage rotary ledger mechanism in the cutoff system in PROTOS M8 cigarette maker was derived on the basis of mathematical analysis. The movement relationship between cutoff knife and ledger during cutting was analyzed and calculated, the theoretical errors of the system were taken into account, and the design parameters of the cutoff system were optimized. The results showed that the deviation between knife and ledger should not exceed 0.05 mm; and the inclination angle of cutoff knife carrier and the rotation diameter of ledger corresponding to cigarette length should be accurately calculated and corrected in design, the optimized rotation diameter of ledger should be: theoretical value+(0.2-0.4) mm and the optimized inclination angle of cutoff knife carrier should be: theoretical value +0.1°. The calculation results provide a theoretical reference for the development of new type cutoff system. ©, 2014, Editorial Office of Tobacco Science and Technology. All right reserved.


Guo J.,China Tobacco Machinery Technology Center Co. | Ma W.,Shaanxi University of Science and Technology
Tobacco Science and Technology | Year: 2013

To solve the problems of cigarette jam and staggering falling movement in discharge channel of cigarette hopper in FOCKE 700S hard packer, the spacer plates and discharge guide plates in the discharge channel was modified via analyzing the factors, which affect the movement, such as cigarette distribution, hopper shape and friction force acting on the cigarettes. The contact area between cigarettes and those plates was minimized, and the friction between cigarette and the spacer plates reduced accordingly. A tobacco discharge slot was added to discharge scattered tobacco out of discharge channel timely and ensure a free cigarette falling. After improvement, the rate of machine failure caused by cigarette jam in hopper reduced from 50%-60% to 25%-35%, and the machine efficiency was effectively improved.


Wang Z.,China Tobacco Machinery Technology Center Co. | Liu Y.,China Tobacco Machinery Technology Center Co. | Jin F.,China Tobacco Machinery Technology Center Co.
Tobacco Science and Technology | Year: 2014

In order to develop a new filter rod maker, the design method for the profile parameters of filter rod accelerating wheel in filter rod maker ZL29 was studied. By kinematics analysis, the velocity and accelerated velocity were obtained, and the calculation method for profile parameters of filter rod accelerating wheel was summarized. By taking the filter rods of 100, 120 and 132 mm in length as examples, the calculated results were compared with the design data provided by Hauni. They were well agreed, it verified the correctness of the calculation method. ©, 2014, Editorial Office of Tobacco Science and Technology. All right reserved.


Xie M.,China Tobacco Machinery Technology Center Co. | Han H.,China Tobacco Machinery Technology Center Co.
Tobacco Science and Technology | Year: 2014

To run the transport jet in ZL28 filter maker more efficiently, the mathematic model of the jet was developed by analyzing its working principle and aerodynamic characteristics. Keeping the pressure of input compressed air unchanged, the effects of input air volume and cross-sectional area at outlet on the negative pressure formed in the jet and the quality of filter rod were experimented. The results showed that: 1) With a constant cross-sectional area at outlet, input air volume positively proportioned to the negative pressure in the jet. 2) At constant input air volume, the negative pressure in the jet rapidly increased first then decreased gradually with the increase of cross-sectional area at outlet. 3) Filter rods with inadequate filling or recessed-end would occur when the negative pressure in the jet was too weak; the draw resistance of filter rod varied wider when too much air was introduced. Transport jet would reach its optimal efficiency when the opening of proportional valve of input air was controlled in the range of 60%-90% and the graduation of cross-sectional area at outlet set in the range of 3-6.


Zhou G.,China Tobacco Machinery Technology Center Co. | Fang X.,China Tobacco Machinery Technology Center Co.
Tobacco Science and Technology | Year: 2013

To eliminate the unbalanced force exerted on the elevating platform of adhesive pot in FOCKE hard packer, the elevating device of adhesive pot was modified. Contra-parallelogram mechanism was used to drive dual elbow-lever and move the adhesive pot up and down at its working position, the mechanism was self-locked and the movement of adhesive pot was prevented when the counter lever approached collineation position. The results of application showed that the improved elevating device of the adhesive pot was completely manually operated, which ensured the stability of adhesive pot elevating platform. The only operation needed was gently pulling and turning the hand lever to install/remove adhesive pot, it reduced maintenance time. The maximum input force for elevating the platform decreased by 15%, the labor intensity of operator was also effectively reduced, while the machine efficiency was increased.


Jin F.,China Tobacco Machinery Technology Center Co.
Tobacco Science and Technology | Year: 2013

The dust collecting device in ZL41 filter rod combiner is designed on the basis of that in YJ14 cigarette maker, the bag filter works unstably and dust cleaning means is obsolete, which result in poor dust cleaning effect and short working life. Therefore, the filter material and system structure were improved. By adopting pleated polyester resin filter cartridge, the filter area was tripled comparing with flannel bag filter. Fan, electric control assembly and electromagnetic valve were configured in the system, and compressed air was introduced. The dust collector was divided into 5 sections, i. e. blowing, filtering, dust collecting, electric control and clear air. The results of application showed that comparing with the dust collector in YJ14 cigarette maker, the designed air volume, filtering area of the improved dust collector increased by 1500 m3/hour and 24.5 m2, respectively, which featured stable filtering performance and good cleaning effect. The working life of filter cartridge was over 3 years, maintenance work was reduced.


Xu F.,China Tobacco Machinery Technology Center Co.
Tobacco Science and Technology | Year: 2015

In order to prevent the adhesive pattern on labels from misalignment, inaccurate shape or uneven adhesive thickness in a self-binding soft packets, a new type hot melt pressure sensitive adhesive application system was designed, which comprised an adhesive pot, an adhesive pipe, an adhesive gun, an operation panel, a controller, an encoder, a sensor, wherein the adhesive was applied by scraping to ensure good appearance. A label guide was designed to ensure the label positioning during scraping. The start and stop positions of scraping were monitored by pulse positioning method. I/P converter was utilized to harmonize the pressure in adhesive pot with the running speed of the packer. The scraping adhesive pattern was tested by setting its length and width 45 mm and 4 mm respectively, and the results showed that: 1)The longitudinal and transverse position errors of scraped adhesive pattern were ±1.100 and ±0.375 mm, respectively; which met the requirements of cigarette packing quality and satisfied the needs of self-binding soft packer. 2)Setting the start and stop positions of adhesive scraping at the middle of label running speed curve would obtain an adhesive pattern with accurate position and good appearance. © 2015, Editorial Office of Tobacco Science & Technology. All right reserved.


Xie M.,China Tobacco Machinery Technology Center Co. | Han H.,China Tobacco Machinery Technology Center Co. | Li Y.,China Tobacco Machinery Technology Center Co.
Tobacco Science and Technology | Year: 2015

In order to master the cutoff device for twin filter rods in filter rod maker, the structure of the device was analyzed. The relationships of filter plug length with the inclination angle of cutoff blade carrier and the rotational diameter of ledgers were derived and a mathematic model was developed, simulation analysis was conducted as well. The results showed that: 1) The center-to-center distance between the twin filter rods, blade width and the diameter and rotary center location of blade carrier should be decided before designing. 2) Filter plug length decided the inclination angle of blade carrier. 3) Filter plug length and the inclination angle of blade carrier decided the rotational diameter of the ledgers. 4) The inclination angles of blade carrier and the rotational diameter of ledgers corresponding to various filter plug lengths were calculated with Matlab software, the calculated results were close to the values provided by G. D Corporation. The theoretical analysis and calculation results of the mathematic model were proved to be correct and applicable to designing the cutoff device for twin filter rods. © 2015, Editorial Office of Tobacco Science & Technology. All right reserved.

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