Twin screw extruder process of hollow plate production line
DATE：2021/5/4 8:42:30 / READ： / SOURCE：This station
Twin screw extruder process of hollow plate production line
Hollow board production line www.handern.com
The material that has been removed accounts for a large volume fraction of the whole formula, and still has a sufficiently low physical degree. The opposite situation may occur, that is, it may be very heavy to transfer enough energy through the molten matrix polymer downstream to completely melt the newly added matrix material. On the contrary, the additional amount will remain in the melted material, causing additional temperature rise. In the case of root mouth, there will be the case that the nail is the most unshielded, resulting in the co-existence of locally overheated fruit complex and Laipei tree collapse. However, if the screw design and operation process are reasonable, this situation can be avoided. Hollow board production line www.handern.com
In the process of preparation of co-occurrence and polymer alloy, it is found that in the process of preparation of co-occurrence and polymer alloy,? The melt initiation and mixing occur at the same time. In the wall region, the strongest shear stress is exerted on the polymer, and the surface disperses the polymer. Therefore, the melt region of the twin screw plays a very important role in determining the microstructure of the polymer alloy, In the preparation of polymer blends and polymer alloys, the configuration design of cell stir and mixing zone is the most important. In addition, it is also very important how to add materials (one time or two times), so the screw configuration design should consider these two problems together. For the process in which all materials are fed through two feeding ports, one or two forward kneading blocks composed of kneading plates with medium thickness can be used for screw feeding / mixing, followed by a neutral kneading block composed of thick support white, and one or two reverse support blocks can be added at the end of the whole melting / mixing zone,? Its function is to produce resistance, which is used to maintain the high filling degree of the material, so as to maximize the residence time of the material, and make the dispersion and mixing in the upstream neutral and forward support block elements more effective. The axial length depends on the flow resistance. If there is no flow resistance element downstream, most of the material roots in the forward and neutral blocks are easy to flow out in the channel of the high shear rate part of the thick kneading plate, so the possibility of particle rupture is very small. This is because the neutral kneading block has no conveying function, and there is no reverse lifting block or other resistance device to block the material flow downstream, so the material will not be filled by 10%. However, after setting the appropriate flow resistance (such as provided by the reverse supporting block), the neutral supporting block will be filled by 100%. The neutral kneading block itself has no conveying function. The material passes through the neutral kneading block only by the combined action of the pressure drop in the neutral kneading block and the reverse drag flow caused by the reverse kneading block, which is overcome by the pressure established by the upstream components of the neutral kneading block. Hollow board production line www.handern.com
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