What is the effect of excessive clearance between screw and barrel? Influence of excessive gap between screw and barrel: 1. The gap between the screw and the barrel is too large, and the flow rate of the molten material during extrusion is unstable, and the product surface is prone to horizontal wrinkles. 2. The gap is too large, the extrusion melt pressure is unstable, so that the c
What are the types of screw gaps of conical twin-screw extruders and what are their functions? In summary, there are the following four working gaps between the screw and barrel of the conical twin screw extruder: (1) The radial clearance between the end surface of the screw rib and the inner diameter circumference of the barrel. (2) The radial clearance between the end surface of the scr
Common problems Possible cause Solution There are bumps on the wall of the tube (like bubbles). The moisture of the material is too high. Properly increase the mixing temperature and extend the mixing time. Impurities mixed in the material Check the source of impurities and remove impurities Poor plasticization. Reduce external lubricant in an appropriate amount and increase plasticization.
The conical twin-screw extruder is the main equipment for producing plastic profiles. When the profile is produced, the twin screw rotates outward in the barrel in different directions. The size of the screw gap not only affects the plasticizing effect of the material, but also affects the quality of the product, sometimes causing machine failure, and even leading to scrapping of heart parts such
Conical twin screw extruder The conical twin screw extruder is an efficient mixing and extrusion equipment. The machine has the characteristics of small shear rate, difficult decomposition of materials, uniform plasticization and mixing, stable quality, high output, wide application range and long service life. Chinese name conical twin-screw extruder is used to modify various plastics with stab
The equipment for PVC profiles is too familiar to me, and requires a production line for mixers, mills, crushers and extrusions. The U-groove processing equipment made for foreign customers this time is also very intentional. Now because of the epidemic situation, there is no way to go out for installation and commissioning. Remote guidance is required, and the equipment is sent to the customer af
What are the types of polymer waterproof membrane 1. PE waterproof membrane: this kind of waterproof membrane has good insulation, mainly used in pools, river embankments, garbage dumps; 2. ECB waterproof membrane: ECB waterproof membrane is used in a wide range and has good toughness 1. Electrical insulation; 3. PVC waterproof coiled material: This is a non-crystalline substance with high stre
It is made of high polymer and some materials or polymer materials as the base material with additives and fillers. It is used in outdoor building walls or roofs and other places that need to be shielded from rain. It is a flexible building product that can be rolled. In the building Water engineering plays an important role in practice. It is widely used in the waterproofing of buildings above g
