Paperboard Machine Rubber Calender Machine

• Type: Calendering Machine
• Sheet Former Type: Fourdrinier Wire
• Paper Thickness: Thick Paper
• Automation: Automatic
• Certification: CE, UL
• Customized: Customized
• Model NO.: CDDD1
• Condition: New
• Trim Width: 1575-4200mm
• Moisture: 4-8%
• Design Speed: 400m/Min
• Working Speed: 80-350m/Min
• Transport Package: Standard
• Specification: Make to order
• Trademark: SUN HONG
• Origin: China
• HS Code: 8439990000

Product Description

Summary

Soft calender is the best grooming for the high-grade writing printing paper and the specialty paper. It reflects the latest calender technology of China. The soft calender is divided into four-roll double press area and two-roll single press area. The double press area soft calender is composed of two pairs of roll body installed on the steel frame structure.The soft and hard rolls are separately on the up and down of two press area. It could calender uniformly on both sides of the paper. It could also calender two times uniformly on the front or on the back.

Principle

The soft rolling zone is composed of a chilled cast iron roll which can be heated and regulated, and a soft roll which can control medium height and whose shell is coated with elastic material. The surface of the soft roll deforms under the pressure, which makes the pressing area contact with each other, so that the pressure per unit area is low, and the paper surface is treated mildly. Therefore, the paper sheet is finished evenly and the loss of loose thickness is less. According to the size of roll diameter, the hardness of soft roll coating material and the applied pressure, the width of soft roll calendering zone can reach 5 ~ 10 mm, which is 5 ~ 8 times of paper machine calendering (hard pressing zone), and the unit pressure is generally 20 ~ 40 N / mm2. Even if the line pressure of soft calender is higher, the unit pressure is only 1 / 3 ~ 1 / 4 of that of paper machine calender.

Features

As the finishing equipment of paper machine and coater, soft roll calender has been developed rapidly because of its superior performance, easy operation, less broken ends of paper web calendering, improvement of paper quality after calendering and high operation rate of equipment.





The soft roll calender is composed of a cold cast iron roll which can be heated and regulated and a soft roll which can control the middle and high outer coating of elastic materials. Compared with ordinary paper machine calender, it has the characteristics of increasing smoothness, reducing bulk thickness loss and maintaining paper strength.





Because of the springback of the soft roll surface material, the roll surface can adapt to any bad evenness and quantitative change of the paper web, so it can have more uniform smoothness and uniform tightness than the conventional hard calender.


Another advantage of soft calendering is that the web can run under the condition of high moisture on the premise that the problems of black pressing and stain are basically eliminated. This is not only conducive to the calendering and finishing of the web, but also keeps the moisture content of the paper roll higher.

Product Parameters

Trim width	1575-4200mm
Paper grade	Two-side offset paper and high-grade writingprinting  paper 300m/min
Basic weight	50-80g/m2
Temperature range of the paper web	45-65ºC
Moisture content of paper web	4-8%
Max design linear pressure	160-200KN/m
Working speed	80-350m/min
Design speed	400m/min
Dynamic balance speed	500m/min
Driving roll(heating) hardness	HSD74±2°(shore hardness)
Surface temp of heating roll	110-220ºC
Diameter of the soft roll	600mm

Our Service

Pre-Sales Service
1.Offering comprehensive technical and business consultation services;
2.Proposing the most suitable scheme and equipment for our clients;
3.Designing and fabricating targeted products according to the special requirements of clients;
4.Training periodically high qualified service technician.
After-Sales Service
1.Highly inspecting equipments in every working procedure, quality comes first;
2.Fast & Safe Delivery;
3.Assisting our clients for foundation construction of equipments;
4.Dispatching engineers to install and debug equipments;
5.Training the first-line operators on site;
6.Regularly visit clients to solve production problems;
7.Providing life-long maintenance service;
8.Providing technical exchanging.