How to ensure the stability and rheological characteristics of the extrudate in the design and manufacture of rubber screw cylinders

Release Time:2023-12-15 13:45

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In the design and manufacture of rubber extrusion screw barrel, the stability of the extrudate should be considered, which mainly includes two aspects: one is the flow stability of the extrudate in the barrel, and the other is the shape and size of the final extrusion. Stability.

First of all, for the flow stability of the extrudate in the barrel, it is mainly realized by reasonably designing the structure and thread shape of the barrel. For example, the design of parameters such as the inner diameter and length of the barrel, the thread lead and the depth of the tooth shape will affect the rubber flow state in the barrel. In the design, it is necessary to ensure that the extrudate can flow stably and smoothly in the barrel to avoid quality problems such as blockage, pores and cracks.

Secondly, the stability of the shape and size of the extrusion molding is mainly achieved by optimizing the heat treatment process and manufacturing accuracy of the barrel. The heat treatment process can improve the hardness and thermal stability of the barrel, thereby improving the shape and dimensional stability of extrusion molding. At the same time, the manufacturing accuracy also has an important influence on the shape and dimensional stability of the extrusion molding. During the manufacturing process, the dimensional accuracy of the inner diameter, wall thickness, thread and other parts of the barrel, as well as the roughness of the inner wall of the barrel and other quality indicators, To ensure the final extrusion molding shape and dimensional stability.

In summary, the stability of the extrudate should be considered in the design and manufacture of the rubber extrusion screw barrel, which requires comprehensive consideration and optimization design from the structural design of the barrel, heat treatment process, manufacturing accuracy and other aspects.

In the design and manufacture of the rubber extrusion screw barrel, the rheological properties of the extrudate should be considered, which mainly include viscoelasticity, plasticity and thermal properties. The rheological properties of the extrudate have an important influence on the extrusion process and the quality of the final product. Therefore, these properties need to be fully considered when designing and manufacturing the barrel to ensure the stability of the extrusion process and the quality of the product.

First, the viscoelasticity of the extrudate has an important influence on the extrusion process. During the extrusion process, rubber undergoes shear flow and extensional flow. At this time, the viscoelasticity of rubber is shown, which has an important influence on the stability of the extrusion process and the quality of the extrudate. The design and manufacture of the barrel should take into account the viscoelasticity of the extrudate, for example, the design of parameters such as the thread lead and the depth of the profile of the barrel should be conducive to the smooth flow of the extrudate and avoid the instability of extrusion due to the influence of viscoelasticity.

Secondly, the plasticity of the extrudate also affects the extrusion process. In the extrusion process, the plasticity of the extrudate determines its plasticity and forming effect. The design and manufacture of the barrel should take into account the plasticity of the extrudate, for example, the design of parameters such as the wall thickness and length of the barrel should be conducive to the plastic deformation and uniform flow of the extrudate to ensure the molding effect and quality of the final product.

Finally, the thermal properties of the extrudate can also have an impact on the extrusion process. The rubber generates heat due to friction during the extrusion process, and external heating also affects the rubber. The thermal characteristics of the extrudate determine its changes in the heated state, which has an impact on the extrusion process and the quality of the product. The design and manufacture of the barrel should take into account the thermal characteristics of the extrudate, for example, the material selection of the barrel and the heat treatment process should be conducive to controlling the temperature change and heat transfer of the extrudate to ensure the stability of the extrusion process and the quality of the product.

In summary, the rheological properties of the extrudate should be considered in the design and manufacture of the rubber extrusion screw barrel, which requires comprehensive consideration and optimization of the design from the aspects of viscoelasticity, plasticity and thermal properties to ensure the stability of the extrusion process and the quality of the product.