This is a know-how that deals with the designing of rubber materials into various kinds of useful materials. These materials include things such as synthetic or natural rubber or latex and others. Calendaring, mastication and rubber extrusion are some common methods used to process rubber into useful forms which later are used in industries or for home purposes.
As opposed to other processes, the extrusion method can only be made to produce objects that have a fixed cross-sectional area. It involves both elastomers that have single layers or several layers. Every line is overseen by a computer by a number of checks staring from the beginning to the end right from the mixing to the final produce.
The manufactured product includes the option of strengthening using other polymers like as polyester, aramide or polyamide or metal fibers for instance stainless steel. This production method can be used in producing both line products and shaped merchandises.
There are two advantages of using this method as compared to others. They include the fact it has ability to produce very complex cross-sections and also, it can work in highly brittle products since it goes through ample and shear stresses. The finished products of this process have an exceptional surface finishing.
Both continuous and non-continuous products can be produced using this process. The non-continuous products are those that are broken down into a several pieces while those that are continuous are in only one long piece. Both cold and hot materials can applied in this procedure.
During the main extrusion process, the polymer compound is fed into the extruder alongside some additives like the curing agents and pigments and antioxidants. The make-up of the extruder is a rotating screw and a closely fitted heating barrel. At this point of the process the product is pressurized, compressed and softened and then fed into the extruder and later fed into the die at its exit. This particular die is a metal plate that is has the shape preferred for the final product.
The already softened latex is forced through die by a rotating screw to assume the shape of the opening. At this point, a phenomenon known as die swell happens as the material leaves the die so that the cross-section to the finished product becomes bigger compared to that of a die. This cross-section may rise up to several folds depending on the product being extruded. Subsequently, the process of vulcanization or curing takes place at the last step of this process. This takes place in order for the product to maintain certain physical properties as well as maintaining its shape.
This process is however not perfect because it has a number of defects. Due to the fact that there may be surface cracking. This refers to breakage of surface due to excess heat or excess friction. In addition to surface cracking, internal cracking may also occur whereby the inner part of the product may form holes. Another defect is the formation of lines on the surface of this product. This may be so because some content of the material sticks to this die thus forming the unwanted lines on the final product. This may be as a result of poor maintenance of this die.
As opposed to other processes, the extrusion method can only be made to produce objects that have a fixed cross-sectional area. It involves both elastomers that have single layers or several layers. Every line is overseen by a computer by a number of checks staring from the beginning to the end right from the mixing to the final produce.
The manufactured product includes the option of strengthening using other polymers like as polyester, aramide or polyamide or metal fibers for instance stainless steel. This production method can be used in producing both line products and shaped merchandises.
There are two advantages of using this method as compared to others. They include the fact it has ability to produce very complex cross-sections and also, it can work in highly brittle products since it goes through ample and shear stresses. The finished products of this process have an exceptional surface finishing.
Both continuous and non-continuous products can be produced using this process. The non-continuous products are those that are broken down into a several pieces while those that are continuous are in only one long piece. Both cold and hot materials can applied in this procedure.
During the main extrusion process, the polymer compound is fed into the extruder alongside some additives like the curing agents and pigments and antioxidants. The make-up of the extruder is a rotating screw and a closely fitted heating barrel. At this point of the process the product is pressurized, compressed and softened and then fed into the extruder and later fed into the die at its exit. This particular die is a metal plate that is has the shape preferred for the final product.
The already softened latex is forced through die by a rotating screw to assume the shape of the opening. At this point, a phenomenon known as die swell happens as the material leaves the die so that the cross-section to the finished product becomes bigger compared to that of a die. This cross-section may rise up to several folds depending on the product being extruded. Subsequently, the process of vulcanization or curing takes place at the last step of this process. This takes place in order for the product to maintain certain physical properties as well as maintaining its shape.
This process is however not perfect because it has a number of defects. Due to the fact that there may be surface cracking. This refers to breakage of surface due to excess heat or excess friction. In addition to surface cracking, internal cracking may also occur whereby the inner part of the product may form holes. Another defect is the formation of lines on the surface of this product. This may be so because some content of the material sticks to this die thus forming the unwanted lines on the final product. This may be as a result of poor maintenance of this die.
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