Research On The Design Of Spiral Engagement Pin Cold Feed Rubber Machine And Simulation Of 3D Dynamic Process

Rubber cold feed extruder is one of the most important contour machine widely used in rubber machining industry now. So far, researchers have done a lot of developments and studies on the key part of extruder—screw over the years. There are many extruders of different screw configurations invented,which have different characteristics because of their working principles.In these screws, pin-barrel screw is widely known and applied for it characteristics of high quality of plastication effect,larger transmission capacity, high stability and self-cleaning extrusion capacity, short production cycle, high-quality products, Low energy consumption and so on.At the same time,it needs to be considered that, it is only when transmission capacity of segement feed matches the plastication ability,that high quality and high productivity extrusion could be ensured. Compared with the development of the screw, the development on the structure of feed zone is relatively slow.In early stage,due to the way of free feeding was impacted by the effect of head anti-pressure, it often feed in accumulation of plastic or plastic strips skid and adversely affect productivity and extrusion stability.Then,there is Followed by the lateral pressure roller feed device, although to a certain extent it has solved the problem of fluctuations and output, However,it is still unable to suit the development of plastics in the cold feed extruder feed function,such as lateral pressure roller could not work any more due to the sizing material entered the bearing, the instability the process of feeding ,and prone to mechanical failure, etc..The paper is based in deep study of spiral mesh feed mechanism and structural advantages and disadvantages of the traditional equipment, with a new design of the meshing pin cold feed screw extruder, doing the research,organic conformity and innovation on the structure based in the original pin cold feed extruder. By theoretic deduce, the paper built up the mathematics model of consuming power about spiral engagement pin cold feed rubber machine, stress and strain , moreover,carried out the relational design calculation and FEA analysis, finished structure optimization design on completely new spiral engagement pin cold feed rubber machine. Finally, for the sake of guaranting the feasibility and reliability of structure,the paper applied parameterizing three-dimensional simulation design and dynamic process simulation of spiral engagement pin cold feed rubber machine. The principally innovation ideas of the thesis as follows:1. It is the first time that spiral mesh technology applications was used in the pin type cold feed extruder, which has solved the problems existing for a long time like low stability of extrusion, plastic leakage , easily feed device failure, low productivity and the issue of high energy consumption. The technique has modern extruder for the realization of high quality, high efficiency, low power consumption, laid the foundation for the performance.2. It is the first time that the second plane enveloping reducer technology applications was used in the pin cold feed extruder, greatly simplifying the traditional extruder used multi-cylinder gear reducer structure, reducing the size of the transmission system by 40 ~ 60%,increasing overload ability by 1~2 times, decreasing noise obvously, as well as significantly increasing the stability of the transmission system and reliability. To simplify the modern extruder transmission structure and improving train performance has opened up new avenues.3. The design used advanced digital sensor technology, compound pressure by the pressure sensor, tension and compression sensor was firstly used in extruder axial force,making the extruder operation more intuitive, convenient, safe and reliable.4. Designed a simple structure for material-supply nose, which maked the extruder could supply material for calendar , could replace the old, a huge open rubber mixing unit for plastic system to enhance production efficiency, reduce energy consumption, to reduce equipment investment, and reduce the labor intensity.5. Focuses on the design of spiral mesh feed installations in the triple sealed: through the bearings put in a plastic anti-tank, shaft and bearing sets with a gap in the medial and bearing strengthen Lamiaceae ring.By these three forms, seal effect could be strengthed.And inaditional,used leakage and spreader tool,effectively prevented access to lateral pressure roller bearing failure. 6. Used finite element analysis software in the design. Reasonable simplified model, rapid, in-depth model of the structure of static analysis on the different options for the structure, the optimization of the design, structure more reasonable and reliable.7. This design successfully combines the traditional design with the three dimensional simulation design and process dynamic simulation design method,which deduces design cycle, reduces cost, and evaluation design In advance of a physical prototype.In this paper,the design of spiral engagement pin cold feed rubber machine, which based on the study, organic integration and innovation of original tradition of the structure extruder, combined the traditional pin cold feed extruder with the new spiral feeding technology and the new transmission technology for the organic integration. It is a breakthrough of the traditional extrusion machine design ideas, and greatly enhanced the production capacity of the extruder and plastication, and improved work efficiency and equipment reliability, reduced energy consumption and ancillary equipment costs. The design has offered an extruder technology for the use of performance standards and laid the foundation for the upgrade.