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Extrusion Design and Know-HowWarning: The technical description consists of "wheat", but may also have "chaff" information. You will get more information, better and according to our best knowledge by contacting us.ReviewHere you will find processes in the commercial use or have been earlier and we have permission to publish description. Items are shown in decending historical order.For these experiments we had two separate PE-pipe manufacturing plants producing pressure and other pipes with eight extruder lines with output dimensions from 20mm up to 500mm. We could test these new systems and inventions at low season described here. No doubt this includes you have to be capable to handle and operate these extruder lines by own hands and myself, if was needed during testing. Formed HDPE-profile![]() Jet Extrusion![]() By maintaining this jet orientation in the die during the cooling and stabilizing of the melt flow it is possible to achieve longer molecule relaxation times before the exit of the die. By transiting the structure of polymer flow, the high shear rate melt fractures at die end can be avoided. When the extrudate is quenched to the solid form, the jet orientation state will stay in molecular structure. The manufactured products have new type performance and properties. Jet Extrusion can also be used with annular and flat die. ![]() BOPE-filmNew generation films are some of the many products, which can be manufactured using the Jet Extrusion method. Not only biaxially oriented PP film (BOPP), but the method is very powerful for manufacturing biaxially oriented HMW-HDPE film (BOPE). The laboratory scale manufactured BOPE film has the following preliminary properties:HS-method; Heat shrinkable productsWe have two new methods to manufacture HS-products directly by extrusion, the older, patented 1987 "Muolon-method" (sold out to USA, EU and Japan) or the new Jet Extrusion method. It is possible to use different ways to do cross-linking, if there is a need for application. For the shrinking property (over 80%) cross-linking is not needed, but good results have been realized with silane peroxides in the material, where the product will cross-link afterwards with the help of moisture in the air or with water.HS-products are used widely as a coating against corrosion and moisture in pipelines and electrical applications, but manufacturing principles are also usable and valuable in the shrink packing businesses. Pulse MixerNovel new generation method and device for continuous mixing at low heat generation and energy.The effective polymer compounder device called the Pulse Mixer device ![]() ![]() ![]() The calculated capacity of the smallest Pulse Mixer SUN 76 and largest SUN 200 is proved and shown in the technical description. -The capacity level is exceptional high, but the number of pulses has to be kept n in a 2- 5 range to get perfect pulse mixing. The pulses compress the polymer and momentary pressure can increase to more than many hundreds of bars, but the temperature rises less in degrees and thus degradation remains minimal. During compression the risen viscosity makes mixing effective and all different molecules are closer to each other at the higher vibration speed, which makes intimate molecular contact easier. Pulse Mixer is used in the extrusion of film and profiles or for compounding, but can also be used separately to make a laboratory mixer. Especially good results have been achieved in extrusion with HMW-PE, PA- and PP-compounds and in recycling. Die design and Modifications of ExtrudersDies have been drawn up to 630mm diameters for polyolefine plastics. Reconditions and modifications have been carryed for decades extruder screws and tubes.RecyclingThe first granted patent was named in 1977 "method and device for granulate plastics waste". We have about 20 years of good and not so good experiences of different procedures of recycling. -"Many things are not written in books or research papers, but if you can do workable products from scrap, then you can do nearly everything from prime and virgin polymers". |
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