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.
This procedure can be used to produce either continuous or semi-continuous products. The continuous products are those that are lengthy while the semi-continuous are those that are broken down into many pieces. This process can work on both hot and cold materials.
As part of this extrusion process, the material to be used is added into the extruder. Later there are additives that are also fed into the extruder in such as antioxidants, curing agents and pigments. The extruder is normally made up of a heating barrel that is closely fitted and a rotating screw. Here the product is pressurized, tenderized and compressed into the die as it leaves the extruder. The die is refers to a metal plate that has the shape of the desired final product.
After the latex has been softened and forced into the die by the rotating screw, it is forced from the die. At this point a process known as die swell takes place. This makes the cross-sectional area of product to be bigger than that of this die. This cross-section becomes bigger in different manners depending on the product being used. After this, curing and vulcanization is performed in order to maintain the strength of product and to avoid loss of some of its physical properties.
This process may however have some defects such as, surface cracking where the surface to extrude cracks usually as a result of excess temperature or friction. Internal cracking can also occur where the center of this product develops voids. Surface lines may also develop most likely caused by the condition of the die used in the process. Some residues of extruded product may stick to the die therefore forming unwanted lines appearing on the finished product.
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.
This procedure can be used to produce either continuous or semi-continuous products. The continuous products are those that are lengthy while the semi-continuous are those that are broken down into many pieces. This process can work on both hot and cold materials.
As part of this extrusion process, the material to be used is added into the extruder. Later there are additives that are also fed into the extruder in such as antioxidants, curing agents and pigments. The extruder is normally made up of a heating barrel that is closely fitted and a rotating screw. Here the product is pressurized, tenderized and compressed into the die as it leaves the extruder. The die is refers to a metal plate that has the shape of the desired final product.
After the latex has been softened and forced into the die by the rotating screw, it is forced from the die. At this point a process known as die swell takes place. This makes the cross-sectional area of product to be bigger than that of this die. This cross-section becomes bigger in different manners depending on the product being used. After this, curing and vulcanization is performed in order to maintain the strength of product and to avoid loss of some of its physical properties.
This process may however have some defects such as, surface cracking where the surface to extrude cracks usually as a result of excess temperature or friction. Internal cracking can also occur where the center of this product develops voids. Surface lines may also develop most likely caused by the condition of the die used in the process. Some residues of extruded product may stick to the die therefore forming unwanted lines appearing on the finished product.
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