An indepth description of filament winding and its fabrication.The slide has good understandability concepts that can be utilised for simple and effective presentation.
Pultrusion is a continuous process for manufacture of composite materials with constant cross-section.
It is more widely used in industries where there is a continuous demand of the product
Autoclave is a closed vessel (Round or Cylindrical) in which processes occur under simultaneous application of high temperature and pressure. Autoclave molding technique is similar to vacuum bag and pressure bag molding method with some modifications. This method employs an autoclave to provide heat and pressure to the composite product during curing.
Pultrusion is a continuous process for manufacture of composite materials with constant cross-section.
It is more widely used in industries where there is a continuous demand of the product
Autoclave is a closed vessel (Round or Cylindrical) in which processes occur under simultaneous application of high temperature and pressure. Autoclave molding technique is similar to vacuum bag and pressure bag molding method with some modifications. This method employs an autoclave to provide heat and pressure to the composite product during curing.
My presentation on resin transfer molding. Not much description included. For reference i would recommend
" Composite manufacturing by Sanjay Mazumdar".
Additives of Polymer, Additives of plastic, Improve properties of Plastic, Ty...Jaynish Amipara
additives of plastic.
uses of filler in plastic.
types of a heat stabilizer.
types of lubricant.
types of plasticizer in plastic.
plastic in antioxidant.
Textile fabric may be define as an assembly of fiber, yarn or combination of these. There are several ways to manufacture a fabric.To produce woven fabric yarn preparation is essential.Good preparation means good weaving,Good weaving =Quality fabric.
My presentation on resin transfer molding. Not much description included. For reference i would recommend
" Composite manufacturing by Sanjay Mazumdar".
Additives of Polymer, Additives of plastic, Improve properties of Plastic, Ty...Jaynish Amipara
additives of plastic.
uses of filler in plastic.
types of a heat stabilizer.
types of lubricant.
types of plasticizer in plastic.
plastic in antioxidant.
Textile fabric may be define as an assembly of fiber, yarn or combination of these. There are several ways to manufacture a fabric.To produce woven fabric yarn preparation is essential.Good preparation means good weaving,Good weaving =Quality fabric.
Analysis of rejected ring cops in autoconer winding machineTaukir Kabir Tusar
This work describes the causes of rejections of rejected ring cops in autoconer winding machine with assessment of various experimental datas from various quality instruments . This causes includes count variation , co efficient of variation (CV%) , Thick and thin places , neps , slubs , hairiness and some miscellunous causes like oil stained yarns , crackers in yarns , half and excess full cops , coca cola shaped cops etc . This work also suggest a few ways to solve the problems and to reduce the rejection rate of cops in an acceptable range . Sufficient amount of figures and graphs are also included here to make this work more accurate .
Ring spinning produces yarn in a package form called cops. Since cops from ringframes are not suitable for further processing, the winding process serves to achieve additional objectives made necessary by the requirements of the subsequent processing stages.
Winding
What is Armature winding?
Terms related to armature winding.
Single layer and double layer windings.
Comparison between closed and open windings.
Types of DC armature winding.
Types of AC armature winding.
Explore the innovative world of trenchless pipe repair with our comprehensive guide, "The Benefits and Techniques of Trenchless Pipe Repair." This document delves into the modern methods of repairing underground pipes without the need for extensive excavation, highlighting the numerous advantages and the latest techniques used in the industry.
Learn about the cost savings, reduced environmental impact, and minimal disruption associated with trenchless technology. Discover detailed explanations of popular techniques such as pipe bursting, cured-in-place pipe (CIPP) lining, and directional drilling. Understand how these methods can be applied to various types of infrastructure, from residential plumbing to large-scale municipal systems.
Ideal for homeowners, contractors, engineers, and anyone interested in modern plumbing solutions, this guide provides valuable insights into why trenchless pipe repair is becoming the preferred choice for pipe rehabilitation. Stay informed about the latest advancements and best practices in the field.
Student information management system project report ii.pdfKamal Acharya
Our project explains about the student management. This project mainly explains the various actions related to student details. This project shows some ease in adding, editing and deleting the student details. It also provides a less time consuming process for viewing, adding, editing and deleting the marks of the students.
Hierarchical Digital Twin of a Naval Power SystemKerry Sado
A hierarchical digital twin of a Naval DC power system has been developed and experimentally verified. Similar to other state-of-the-art digital twins, this technology creates a digital replica of the physical system executed in real-time or faster, which can modify hardware controls. However, its advantage stems from distributing computational efforts by utilizing a hierarchical structure composed of lower-level digital twin blocks and a higher-level system digital twin. Each digital twin block is associated with a physical subsystem of the hardware and communicates with a singular system digital twin, which creates a system-level response. By extracting information from each level of the hierarchy, power system controls of the hardware were reconfigured autonomously. This hierarchical digital twin development offers several advantages over other digital twins, particularly in the field of naval power systems. The hierarchical structure allows for greater computational efficiency and scalability while the ability to autonomously reconfigure hardware controls offers increased flexibility and responsiveness. The hierarchical decomposition and models utilized were well aligned with the physical twin, as indicated by the maximum deviations between the developed digital twin hierarchy and the hardware.
Saudi Arabia stands as a titan in the global energy landscape, renowned for its abundant oil and gas resources. It's the largest exporter of petroleum and holds some of the world's most significant reserves. Let's delve into the top 10 oil and gas projects shaping Saudi Arabia's energy future in 2024.
CFD Simulation of By-pass Flow in a HRSG module by R&R Consult.pptxR&R Consult
CFD analysis is incredibly effective at solving mysteries and improving the performance of complex systems!
Here's a great example: At a large natural gas-fired power plant, where they use waste heat to generate steam and energy, they were puzzled that their boiler wasn't producing as much steam as expected.
R&R and Tetra Engineering Group Inc. were asked to solve the issue with reduced steam production.
An inspection had shown that a significant amount of hot flue gas was bypassing the boiler tubes, where the heat was supposed to be transferred.
R&R Consult conducted a CFD analysis, which revealed that 6.3% of the flue gas was bypassing the boiler tubes without transferring heat. The analysis also showed that the flue gas was instead being directed along the sides of the boiler and between the modules that were supposed to capture the heat. This was the cause of the reduced performance.
Based on our results, Tetra Engineering installed covering plates to reduce the bypass flow. This improved the boiler's performance and increased electricity production.
It is always satisfying when we can help solve complex challenges like this. Do your systems also need a check-up or optimization? Give us a call!
Work done in cooperation with James Malloy and David Moelling from Tetra Engineering.
More examples of our work https://www.r-r-consult.dk/en/cases-en/
2. CONTENTS
• Introduction
• Requirements for Manufacturing
• Brief Description of Process
• Types of Winding Process
• Materials Used
• Process Parameters
• Possible Cross sections
• Advantages
• Disadvantages
• Applications
3. INTRODUCTION
Filament winding is a fabrication technique mainly used for
manufacturing open or closed cylinders like pressure vessels
tanks or axisymmetric hollow structures.
4. The process involves winding filaments under tension over a
rotating mandrel.
The mandrel rotates around the spindle in X-axis while a
delivery eye on a carriage in Y-axis traverses horizontally in
line with the axis of the rotating mandrel, laying down fibers in
the desired pattern or angle.
The most common filaments are glass or carbon fibre strands.
These are impregnated in a bath with resin as they are wound
onto the mandrel.
12. • A large number of fibre rovings are pulled towards the resin bath.
• Before entering the bath, rovings are gathered in the form of band
by passing them through stainless steel comb.
• At the end of the resin bath, the resin impregnated rovings are pulled
through a wiping device to remove excessive resin.
• Once the rovings have been thoroughly impregnated and wiped,
they are gathered on a flat band and positioned on mandrel.
• The band former is usually
located on the carriage which
traverses back and forth
parallel to the mandrel.
13. • In turn , mandrel rotates at lower speed to get precise
winding.
• After winding a number of layers of desired thickness, the
filament-wound part is cured in mandrel.
• The mandrel is extracted from cured part.
• The component is normally cured at high temperature
before removing the mandrel.
• As in pressure vessels , mandrel becomes an integral part
of filament wounded part.
14. Types of Winding Process
There are three types of winding based on wind angle
(The angle of roving band with respect to mandrel axis is
called wind angle. Wind Angle of 0 to 90 degreed can be
obtained)
• Helical Winding
• Circumferential Winding
• Polar Winding
20. Fibre Tension & Resin Content
Fibre Tension is created by pulling the rovings through a number of
fibre guides placed between the creels and resin bath.
Adequate Fibre tension is needed to maintain fibre alignment in
mandrel and resin content.
Mechanical actions on fibres in resin bath such as looping generally
creates additional fibre tension.
Typical tension values range from 1.1 to 4.4N.
Excessive fibre tension can cause
• Difference in resin content in inner and outer layers
• Residual stresses in finished product
• Large mandrel deflections.
21.
22. Fibre Wet-Out
Fibre Wet-Out depends on
• Viscosity of resin at operating temperature
• Number of strands in a roving that determines
accessibility of resin to each strand.
• Fibre Tension.
• Speed of winding
• Length of Resin bath.
(For good Wet-Out , each roving should be under resin bath
for 1/3 to ½ seconds in a bath of 20cm)
23. Material Properties (Resin)
The viscosity of resin bath should be low enough for impregnating
the fibre strands in resin bath, yet not so low that resin drips and
runs out easily.
(Usually a viscosity of 1-2 Pa-s is preferred)
Should have relatively long pot life.
(Pot life is the amount of time taken for an initial mixed viscosity to
double)
Should be chemically inert.
Shouldn’t change its composition when subjected to high
temperature.
25. Advantages
• Highly reproducible nature of the process
• Continuous fiber over the entire part
• High fiber volume is obtainable
• Ability to orient fibers in the load direction (10° minimum
winding angle)
• Fiber and resin used in lowest cost form
• Size of component not restricted by oven or autoclave size
• Process automation (particularly with high volume) results
in cost savings
26. DISADVANTAGES
• Defects such as voids , delaminations and fibre wrinkles
• Part configuration must facilitate mandrel extraction
• Mandrel could be complex and expensive
• Inability to wind reverse curvature
• Inability to easily change fiber path within one layer
• Wound external surface may not be satisfactory for some
applications
