Home > News

PTFE turning board manufacturers tells you calender instructions

Publisher:admin Time:2013-03-08 09:37:00
PTFE turning board manufacturers tells you calender instructions
Yangzhong City Dongxu Chemical Plastic Co., Ltd. provides you tell calender Teflon tape of the instructions
From the nineteenth century, the calendar method began to be used to process paper and foil. Later, with the development of the rubber industry, the United States and Germany began with chilled cast iron roll calendering processing rubber. Initially it is using two rubber mixing machine rollers, and later have three roll calender. 1836, on the basis of non-Americans B.M. check on the three-roll machine designed the first four-roll calender.
1930s due to the large number of PVC production, the United States and Germany have a trial processing of rubber calender rolling poly ethylene catch. However, in view of these rubber rolling machines by original design constraints, in some respects still can not fully meet the requirements of the plastic processing, for example in order to obtain a higher level of film thickness tolerance, in addition to the requirements of a higher calendering roller other than precision, but also have a much higher temperature than the rolling rubber roll and easy to control the heating system, as well as compensation for the impact of the roll separating force means. So later on the design of specialized rolling plastic calender.
Plastic calender roll can be divided according to the number of two-roll calender, calender machine, four and five-roll calender roll calender. Roll the same number of cylinder there are a variety of calender roll arrangement. Depending on the roll arrangement, in accordance with standard GB / T13578-92 provisions calender can be divided into I-shaped, r-shaped, L-shaped
Two roll calender fractions I-shaped and horizontal types. Wherein, I-shaped arrangement is mainly used for two-and three-roll calender rolls, which are arranged in the form of roll structure makes the device structure is simple, easy to manufacture and low manufacturing cost, small footprint, light weight, electrical power use more economical. The disadvantage is that the material is difficult, generally require manual loading, resulting in feeding uneven, poor quality film products formed, mainly due to large errors and uniformity of film thickness.