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Extension machine (calender) is a machine composed of two or more rollers, arranged in a certain form, at a certain temperature, rubber or plastic pressing extension into a certain thickness and surface shape of film, and can be fiber curtain canvas or wire curtain hanging glue machinery.The der can be divided into two rollers, three rollers, four rollers and five rollers according to the number of rollers

The working principle of the rolling machine is roughly the same as that of the mixer. When the adhesive material with certain temperature and plasticity is fed into two rotating rollers, under the action of the adhesive material is pulled into the roller distance under the friction force. Due to the gradual decrease of the roller distance section, the adhesive material is strongly squeezed and extended.Usually many rolling processes require paired rollers to work at a certain speed ratio, allowing the adhesive to further mix, knead and increase plasticity, and finally be pressed into a film with a certain thickness and width through the minimum roll distance.In addition to press the glue into film, some processes also need to squeeze the film on the textile (glue or glue) or wire curtain cloth under the action of roller extrusion pressure, some need to press into a certain pattern and shape (pressure), and some need to glue multi-layers of film together.



In addition to the main parts and devices of ordinary tender, the device to ensure the accuracy of pressure extension is added. In addition to the main parts and devices of ordinary ducder in the laboratory, the device to ensure the accuracy of pressure extension is added, such as pressure holding system, bearing gap regulating system, etc.
Guangzhou POTOP double roller mixer is a kind of rubber and plastic mixing, molding and pressing molding.Its main uses are as follows:
(1) Mix of rubber and plastic
The different types and grades of rubber or plastic and additives through the two rollers of the small precision double roller press, so that each component is evenly dispersed and mixed into a uniform system;
(2) Plasmping of rubber and plastic
Under the double action of the mechanical shear force and roller surface temperature of the small precision double-roller mixer, the plasticizing and smelting of rubber and plastic are completed

                                                  Toll roll mill

Guangzhou POTOP small precision three-roll rolling machine is mainly used for
1.Rubber / plastic mix with dispersion of components
2.Plasticity and mixing of rubber and plastic
3.Rubber, plastic formula design
4.Preparation of rubber and plastic sheets
5.Surface treatment of rubber and plastic sheets
6.Optimization and control of rubber rolling process parameters
7.Optional embossed roller / fog surface roller for diversified surface treatment of rubber sheet

       Small precision three-roller calender

Guangzhou POTOP Laboratory precision four-roll rolling TPU medical braces extrusion rolling machine is a kind of rubber and plastic roll adhesive coating molding and surface treatment equipment, set sheet softening, adhesive differential coating, thickness equal speed rolling, surface leveling treatment, sheet cooling setting and other functions in one.The whole machine is made of four rollers in S longitudinal arrangement, numbered as 1 #, 2 #, 3 #, 4 #, 3 # roller position is fixed, and the rest of the rollers can move to adjust the gap between the rollers, the roller is driven by German SCHNEIDER servo motor, can ensure accurate roll line speed control and ensure the size accuracy of the product.Through the mold temperature and heat conduction oil heating medium can be heated for each roller to ensure the accurate temperature and distribution of the roller surface to meet the requirements of different rolling process.

         Precision four-roller calender

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