Whether the QR code access control system can support visitor management depends on whether the system has a software background and whether it has management functions. A set of two-dimensional code access control system that can support visitor management, specifically requires the following functions: 1. Support the identification of dynamic QR codes; 2. Support one-click sharing of communication software such as QR code mobile phones, and the shared QR code is time-sensitive; 3. The permissions of visitors and users are different; 4. There is a background management software, which can monitor the entrance and exit in real time. The static QR code access control system, due to the immutability of the QR code, is easy to be stolen maliciously and cannot be better for visitor management. Therefore, the QR code access control system with visitor management must be a dynamic QR code. More convenient and safer. The dynamic QR code will be refreshed in real time, and even if it is stolen, it will become invalid within a certain time limit, which is more secure. The Cyberros QR code access control system has the function of supporting the identification of the dynamic QR code. The QR code of the static QR code access control system cannot be shared. Once shared, it will cause great losses due to the immutability of the QR code. Therefore, the QR code access control system with visitor management must be able to support mobile phones. Such as communication software one-click sharing, and the shared QR code is also time-sensitive, to ensure the maximum security of the shared QR code, the Cyberros QR code access control system has the function of one-click sharing of dynamic QR codes. There are two ways for visitors to obtain QR codes. They can obtain a time-sensitive QR code for sharing from the interviewee, and they can also obtain a temporary QR code after registering at the management office to ensure a distinction between visitors and users. Can guarantee the safety of users. Through the background management software, the information of visitors can be managed, and temporary visitors can be registered and temporary QR codes can be issued. The timeliness of the QR codes can be customized to prevent visitors from staying for a long time and achieve real-time monitoring of entrances and exits. Burrows QR code access control system has the function of real-time monitoring of entrances and exits.
A4 Paper Machine
This is A4 Paper Making Machine,writing and printing paper making machine.
According to the different paper grade and working speed, this kind of paper machine is needed to select the way of papermaking, dewatering structure of press section, dryer cylinder bank, sizing and finishing equipments.
Sheet forming can use the open-type headbox, air-cushion headbox, and hydraulic headbox, gap former and inclined wire former. According to the paper uniformity requirement, it can use distributor roll or finishing surface roll.
Press dewatering type is multi-roll and multi-press nip press rather than large-diameter press. As the low basis weight and wet strength of this kind of paper, it usually makes the low strength wet sheet attached to the felt or guide rolls during each section mutual transferring and full web leading as much as possible.
Dryer section: dryer cylinder group. Paper leading: active or passive paper rope system. Finishing equipment: To choose according to the paper grade requirement.
Now we introduce the technical proposal and structural drawing of Fourdrinier advanced printing paper machine, which we made for Taiqian Minrui Huatong Paper Company in Henan province, China. The advanced printing paper of this company is the famous brand in China.
Trimmed width: 2640mm
Working speed: 400m/min
Basis weight: 50-100g/sq.m.
Headbox: Air-cushion headbox
Forming table length: 15m
Suction flat box with all stainless steel micro-crystal cover.
Press section: four rolls two press nips
The wet sheet is stripped by pick-up suction unit.
The second under press nip rubber blind bottom roll diameter is Φ800mm, with drive unit;
The suction top roll diameter is Φ800mm, with drive unit.
The top press nip is made by a stone roll and a rubber roll. The rubber roll diameter isΦ800mm, with drive unit;
The stone roll diameter is Φ850mm, with cut squirt.
This structure ensures the low strength wet sheet can press smoothly and paper breaks can be reduced.
The smooth press rubber bottom roll diameter is Φ800mm; the top stone roll diameter isΦ850mm. The paper leading roll has the drive unit.
The dryer section has 32 dryer cylinders with the diameter of Φ1800mm, which is divided into five groups: three groups for before-sizing, two groups for after-sizing. The top and bottom felt of first group and the group at the back of sizing machine is equipped with six felt drying cylinder with the diameter of Φ1250mm, which can dry the moisture well and improve the drying efficiency.
The paper leading roll has the drive unit. The paper leading type is three-stage passive paper rope system.
Sizing machine: inclined type surface-sizing machine.
Calender: four roll three press nips; the number is decided by the demands.
Reeler: horizontal pneumatic reeling machine.
If you are interested in our products, please feel free to contact us for more information, we are glad to give you the competitive quotation upon receipt of your detailed requirements.
A4 Paper Making Machine,A4 Paper Machine,Writing And Printing Paper Machine,A4 Copy Paper Making Machine Dandong Tianshin Automatization Technology Co.,Ltd , https://www.tianshinmachine.com
