Extrusion Training Manual
With customer Satisfaction at its TOP Priority, Hikon has always maintained its post-sale commitments irrespective of geographical boundaries to ensure maximum uptime at customer’s end. Hikon supports all means of communication and technology to stay connected with its clients in order to listen to their queries and assist them in resolving their issues. Our Technical Support Cell has a team of Technical Experts, always with full preparedness to take customer calls for any Technical Assistance required. Further to “Trouble-shooting” Hikon extends Technical Support through a team of qualified process experts, on selection of recipes, polymers blend and film structure. Contact details any technical assistance: Email: service@hikonindia.com Phone: +066. Qualified Engineers from our Customer Care Department are available for personal visits for any technical query which cannot be solved by distance communication and assistance. Smooth pre-dispatch trials of all machineries manufactured at our premises and efficient functioning at our clients’ are the most important goals at Hikon.
Hikon India is Happy to assist our customers with technical assistance. Browse for field services, spare parts, manuals and Training. Training classes. Learning paths & course catalogs. The DraftSight Getting Started Guide provides the fundamental skills necessary for the efficient use of.
The Complete Beginner’s Guide to Autodesk Revit Architecture. Using the 'Roof by Extrusion' tool (See also Revit Roofs Masterclass) Watch the video: 4.12.
A dedicated team of Service Engineers is always ready to cross boundaries any time to visit client sites and rectify the problem. To avail 24/7 customer service by Hikon, please lodge a request at 'Online Request for Service Engineer'. Vespa sprint 150. You can also send the requirement of service engineers on. Email: service@hikonindia.com Phone: +066. Hikon offers a full range of lifecycle support & service of spare parts & equipment repair, onsite training and technical support. We maintain stock of all essential spares for the products.
This helps us to meet our client’s requirement that comes with urgency as malfunctioning of any single spare part of a machine can put the entire process on hold. All our clients are also supplied with well detailed product manuals having product & spare parts numbers in a way that is easy to recognize and order. We ensure dispatch of spare parts within 24 hours provided the requirement is clear and commercial formalities are completed. To get spare parts please contact us at: Email: service@hikonindia.com Phone: +066.
With customer Satisfaction at its TOP Priority, Rajoo has always maintained its post-sale commitments irrespective of geographical boundaries to ensure maximum uptime at customer’s end. Rajoo supports all means of communication and technology to stay connected with its clients in order to listen to their queries and assist them in resolving their issues. Our Technical Support Cell has a team of Technical Experts, always with full preparedness to take customer calls for any Technical Assistance required.
Further to “Trouble-shooting” Rajoo extends Technical Support through a team of qualified process experts, on selection of recipes, polymers blend and film structure. Contact details any technical assistance: Email: Phone: +91 97 129 62704. Qualified Engineers from our Customer Care Department are available for personal visits for any technical query which cannot be solved by distance communication and assistance. Smooth pre-dispatch trials of all machineries manufactured at our premises and efficient functioning at our clients’ are the most important goals at Rajoo.
A dedicated team of Service Engineers is always ready to cross boundaries any time to visit client sites and rectify the problem. To avail 24/7 customer service by Rajoo, please lodge a request at ' Online Request for Service Engineer'. You can also send the requirement of service engineers on, Email: Phone: +91 97 129 52701(extension – 167). Rajoo offers a full range of lifecycle support & service of spare parts & equipment repair, onsite training and technical support. We maintain stock of all essential spares for the products.
This helps us to meet our client’s requirement that comes with urgency as malfunctioning of any single spare part of a machine can put the entire process on hold. All our clients are also supplied with well detailed product manuals having product & spare parts numbers in a way that is easy to recognize and order.
We ensure dispatch of spare parts within 24 hours provided the requirement is clear and commercial formalities are completed. To get spare parts please contact us at: Email: Phone: +91 97 129 52701(extension – 126). Abrasive Wear. Adhesive Wear. Laminar Wear.
Surface – Fatigue Wear Probable Cause/s. Abrasive components in polymer matrix i.e. Filler, reinforcements, additives, etc.
Remedy. Screw OD is worn-out but not flight flanks and the root diameter, than problem can be caused by contact between screw and barrel. one could put hard facing on the tip of the flight. Corrosive Wear Probable Cause/s. Corrosive wear is more frequent with non filled polymers such as PVC or PVC2. Hygroscopic material such as ABS, PA, PET, PMMA.
Metal to metal wear occur at start up, or misalignment, or wrapped barrel or wrapped screw, or in twin-screw extruder. Remedy. This can reduced the magnitude of the problems. Corrosive wear can usually identified by pitted and worn surface. To eliminate the corrosive component from compound.
Use corrosion resistant materials. Bimetallic barrels provide better resistance than nitriding barrels. Screw hardening by nitriding and nickel / chrome plating can increase the life. Probable Cause/s. Thermal Polymer is exposed to an elevated temperature in an insert atmosphere under extrusion of other compounds. Mechanical Molecular scission induced by the application of mechanical stresses. Chemical Processes which are induced under the influence of chemicals in contact with a polymer such as acids, bases, solvents, reactive gases, etc.
Factors affecting rates of degradation:. RTD. Stock temperature and temperature.
Deformation rate and deformation rate distribution. Presence of solulaytic agents, oxygen and other degradation promoting agent. Presence of antioxidants and other stimulates. The chance of degradation in the extruder can be reduced by marking following changes to process: Remedy.
Reduce RTD and achieve narrow RTD. Reduce stock temperature and avoid high pick temperature. Eliminating degradation promoting subs. If degradation occurs by thermo-oxidative mechanism, air should be excluded from the extruder. This can be done by putting a nitrogen blanket on the feed hopper, vent port or at the die depending upon where air is introduced. If the degradation occurs by chemical reaction with metal surfaces of screw and barrel, a non-corrosive material of construction has to be selected for screw and barrel. Air Entrapment.
Probable Cause/s. Air being dragged in with particular material from the feed hopper under normal conditions. The compression of solid particulate material in feed section will force the air out of the solid bed.
However under some circumstances the air can not escape back. To feed hopper and travel with polymer until it exits from die. As the air pocket exit from the extruder the sudden exposure too much lower ambient pressure may cause the compress air bubble to burst in explosive manner. Remedy. There are a number of possible solutions to air entrapment. The first approach should be to change the temperature in the solid conveying zone to achieve a more positive compacting of the solid bed. Often a temperature increase of the first barrel section reduces the air entrapment.
However, in some cases, a lower temperature causes n improvement. In any case, the temperature in the solids conveying zone are important parameters in the air entrapment process. It should be realized that both the barrel and screw temperature are important.
Thus, if a screw temperature adjustment capability is available, it should definitely be used to reduce the air entrapment problem. The next step is an increase in the die-head pressure to alter the pressure profile along the extruder and to hopefully achieve a more rapid compacting of the solid bed. The die-head pressure can be increased by simply adding screens in front of the breaker plate. Another possible solution is to starve feed the extruder; however, this will probably reduce to output somewhat and requires additional hardware i.e. An accurate feeding device. The aforementioned recommended solutions can be implemented rather easily. However, if these measures do not solve the problem, more drastic steps have to be taken.
One possibility that needs to be explored is a change in particle size or shape if this is a reasonable option, it will most likely solve the problem. A rather safe solution is to utilize a vacuum feed hopper system; however, these systems are rather complex and expensive. Another possible solution is to use a grooved barrel section. Pressure development in a grooved barrel section causes a rapid compacting of the solid bed and therefore, a much reduced chance of air entrapment. Instead of grooving the barrel, one can opt for reducing the friction on the screw which would have a similar effect.
A coating that might be used for this purpose is described by Luker. Air entrapment is also often successfully eliminated by vented extrusion using a multi-stage extruder screw. Increasing the compression ratio of the screw is also likely to reduce. Air entrapment it should be noted that bubbles in the extrudate are not only signs of air entrapment, but it may also be an indication of moisture, surface agents, volatile species in the polymer itself, or degradation.
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Thus, before concentrating on solving an apparent air entrapment problem one should make sure that the problem is indeed caused by air entrapment. In some cases, the pellets contain small air bubbles within the pellet itself. In the case, one of the few possible solutions is vented extrusion; most of the other recommended solutions will not work in this situation.