Today's KNOWLEDGE Share:Skin is in Tension

Today's KNOWLEDGE Share

I recently talked about residual stresses on the skin of a molded part, since that could be critical for part performance .

But how can you verify if a skin is in tension ? ESCR is one way, but you can also use this neat "layer removal" method.

If you machine out say 50 microns, and observe the remainder of the part, a curvature will appear due to the broken force moment equilibrium. If the part bends downward, the skin is indeed in tension (keeping the part straight to begin with)!

If it bends upwards, the skin is in compression.

Quantitative methods, initially limited to homogeneous and isotropic materials, have been developed to reconstruct the entire residual stress profile from successive layer removal.

Source:Vito leo

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Today's KNOWLEDGE Share Why is Nylon 66 better than Nylon 6?

Today's KNOWLEDGE Share

Why is Nylon 66 better than Nylon 6?

Nylon was discovered by Wallace Hume Carothers. A chemist hired in 1928 by DuPont de Nemours to lead an extensive research program on the design of original polymeric materials. In 1935, he developed the formula known as PA 66:

Nylon 66 and Nylon 6 are both types of nylon, a strong, durable, and versatile plastic material that has a wide range of applications. However, there are some key differences between the two that make Nylon 66 better suited for certain applications than Nylon 6.

Strength: Nylon 66 has a higher tensile strength and modulus of elasticity, which means that it is stronger and more durable than Nylon 6. This makes it a better choice for applications that require high strength and durability.

Temperature Resistance: Nylon 66 is able to withstand higher temperatures than Nylon 6, making it more suitable for applications that involve exposure to high temperatures, such as Frac Sand and other Industrial applications.

Moisture absorption: Nylon 66 has a lower moisture absorption rate than Nylon 6, this means that it is less affected by changes in moisture levels and will maintain its strength and dimensional stability better.

Cost: While Nylon 66 is more expensive than Nylon 6, and this can be a factor when choosing a material to meet the requirements.

Nylon 66 is a stronger and more durable material than Nylon 6, it has better temperature and moisture resistance, making it a better choice for applications that require high strength, durability and resistance to different environmental factors.

Source:Dean Wedekind

OMCs hike ethanol procurement prices by Rs 6.87/litre: Oil ministry

State-run oil marketing companies bumped up the procurement price of ethanol made from C heavy molasses by Rs 6.87 per litre for the 2023-24 supply season, in a bid to to maximize #ethanol production and improve its availability for blending it with petrol.

The latest price hike takes the price to Rs 56.28 per litre, higher than the previous season's Rs 49.41 per litre announced last year. The move come as Prime Minister Narendra Modi’s government aims to achieve 20% blending of ethanol in petrol by 2025 from the present levels of 10%.

C molasses, a by product of sugar factory and its utilization for ethanol production, is an effective way to promote green economy, ministry of Petroleum and Natural gas said on December 29.

India, which is the fifth-largest producer of ethanol in the world, is pushing for the blending of ethanol — which can be done domestically — in petrol, to become self-reliant in energy as the country imports nearly 85 percent of its oil needs.

C-heavy molasses accounted for 1% of ethanol production last ESY

During ESY 2022-23, OMCs floated tender for the procurement of 599.7 crore litres of ethanol, against which Letters of Intent (LoIs) for 567 crore litres were issued. While sugarcane juice accounted for 25 percent of the total ethanol production, B-heavy molasses accounted for 45 percent, C-heavy molasses accounted for 1 percent and foodgrains accounted for 29 percent.

According to sources, OMCs will be looking to procure 5.62 billion litres of ethanol, out of which 47.86 percent is expected to come from B and C-heavy molasses, while the rest will come from grains. India's sugar production in ESY 2023-24 is estimated to be around 29 Million Tonnes (MT), down from 33 MT produced in ESY 2022-23.

Source:www.moneycontrol.com/www.energywatch.in

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Today's KNOWLEDGE Share : Hill Helicopters

Today's KNOWLEDGE Share

Hill Helicopters is on a mission to build the world's first truly private helicopter, engineered for flight, designed for owners! 

For that, they took the bold decision to make the main composite structure of the HX50 in a single piece: A monolithic carbon fiber crash cell, beautifully styled and aerodynamically sculpted, that gives them the balance of performance, strength and cost effectiveness! 

The company has been able to demonstrate that their approach to making a monolarge in a single piece not only works, but is remarkably cost-effective. 

Source:Hill Helicopters/Marcelo Magiero Webster

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Laboratory extruder relaunched: ZE 28 BluePower

At this year’s Fakuma in Friedrichshafen, Laatzen-based KraussMaffei Extrusion GmbH will exhibit the newly designed ZE 28 BluePower laboratory extruder. In addition to fast availability and a highly attractive price, this extruder is characterized by improved ease of operation and enhanced performance.

The new high-performance laboratory-scale extruder convinces by a perfect combination of free volume (OD/ID =1.65) and high torque density of 13.6 Nm/cm³. Depending on the specific process requirements, the processing section can be configured within a length range of 32 to 64 D and equipped with up to three side feeders.

Just like the other extruders in this series, the ZE 28 BluePower is available in three material variants, in order to offer the wear resistance and corrosion protection required for customer-specific applications.

Solution for any application with optimized ease of operation

The laboratory extruder is designed to implement bespoke process solutions thanks to a wide variety of configuration options. These include processing section elements in high-temperature design with a thermal resistance of up to 420°C. In addition, the automatic screw removal towards the drive – or "UltraGlide” feature for short – further expands the range of applications for this machine.

Since October 2022, the standard version of the ZE BluePower extruder has been equipped with the newly developed “pioneer processControl” (ppC) featuring wizards (assistants) for enhanced production reliability. These wizards provide the operator with step-by-step instructions for certain procedures such as starting the production line or shutting it down. As a matter of course, common up- and downstream systems can be integrated into the new control system.

Focus on higher efficiency, shorter delivery times and increased cost effectiveness:

“After intensive discussions with our customers, we have responded to current market requirements and improved our twin-screw extruder accordingly.

In the future, we will offer our extruder with a cost advantage as compared to our competitors and an attractive delivery time.”

High energy efficiency, excellent temperature control within the processing section, improved surface cleaning, enhanced power electronics protection and an optimized strand extrusion die are the key features of the relaunched ZE 28 BluePower design. The processing sections including the screw configurations are still customized and all process-engineering results can be scaled up without any problems to the entire BluePower extruder range from size ZE 42 up to the ZE 186.

Source:www.plasticsnews.com/KraussMaffei

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Today's KNOWLEDGE Share:High-load composite bearings

Today's KNOWLEDGE Share

Trelleborg launches Orkot® C620 high-load composite bearings

Trelleborg Sealing Solutions pushes the boundaries of composite technology with the launch of Orkot® C620, an innovative ultra-low friction bearing material with five times the compressive strength of other Orkot materials for offshore and marine applications.

A high-specification thermoset composite, Orkot® C620 meets the requirements of the most demanding high-load applications. Though strong and light, it withstands high loads and stresses over a long service life.

“Orkot® C620’s optimized properties provide customers with a step change in composite bearings, offering a unique combination of ultra-low friction and a compressive strength of 470 MPa, five times the strength of standard Orkot® materials. It is both stronger and has better friction characteristics than competitor composite materials, and can even challenge many metallic bearings for strength, offering industries such as aerospace the lighter, lower-friction solutions they increasingly demand.”

“Featuring a strong #glassfiber backing with a low-friction Orkot® lining, it builds upon regular Orkot® composite formulations with a unique compound where the properties of the different layers increase load capacity and strength. It does this without compromising weight while reducing friction and eliminating maintenance to maximize efficiency and service life.”

Because of its unique characteristics, Orkot® C620 is an attractive solution across a wide variety of sectors with demanding high-load applications including offshore and marine applications.

For offshore wind turbines, it reduces maintenance requirements for deep-sea mooring connections and provides electrical isolation, enhancing corrosion resistance while resisting high loads from rough ocean currents. In wind turbine pitch cylinders it provides a very low coefficient of friction, allowing smooth operation at high loads and low speeds.

For floating production, storage and offloading (FPSO) mooring infrastructure, Orkot® C620’s advantages include low wear rates in fairhead and tensioner applications, and low friction and minimal stick-slip, making it ideal for slow movements in FPSO turrets and swivel stacks. In mid-water arches, it is strong enough to withstand high loads on supporting risers, cables and umbilicals.

Orkot® C620 also delivers outstanding performance in aerospace applications. It is ideal for landing gear applications, providing the required strength of a comparable metal bearing with significant weight reduction, increasing fuel efficiency and allowing for more passenger and luggage capacity. This is critical in industries like aerospace where every kilo counts as manufacturers focus on ‘lightweighting’ to reduce fuel requirements and improve the sustainability of flying.

Source:www.trelleborg.com/www.jeccomposites.com

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Today's KNOWLEDGE Share :The Mystery of Holes in Cheese Knives

 Today's KNOWLEDGE Share

The Mystery of Holes in Cheese Knives 

Ever wondered why some cheese knives come with those intriguing holes in the blade? 

Let's demystify the magic behind this unique design!

1. Friction-Free Slicing:

  - Those holes aren't just for show – they reduce friction, making it a breeze to slice through soft cheeses without the usual sticky struggles.

2. Precision Cuts:

  - The strategic hole placement isn't random; it's a masterstroke for achieving precise, even slices. Say goodbye to uneven chunks and hello to cheese perfection!

3. Enhanced Control:

  - Ever felt like your knife has a mind of its own? The holes contribute to better control, guiding your knife with ease and finesse through every cheese variety.

In the world of cheese, it's not just about the slice; it's about the experience. So, the next time you reach for that cheese knife, remember, those holes are there to elevate your cheese game to new heights! 

𝑫𝒊𝒔𝒄𝒍𝒂𝒊𝒎𝒆𝒓: 𝘐 𝘩𝘢𝘷𝘦 𝘵𝘳𝘪𝘦𝘥 𝘵𝘰 𝘦𝘯𝘴𝘶𝘳𝘦 𝘢𝘤𝘤𝘶𝘳𝘢𝘤𝘺 𝘣𝘶𝘵 𝘮𝘪𝘴𝘵𝘢𝘬𝘦𝘴 𝘮𝘢𝘺 𝘰𝘤𝘤𝘶𝘳. 𝘐 𝘸𝘪𝘭𝘭 𝘣𝘦 𝘩𝘢𝘱𝘱𝘺 𝘵𝘰 𝘤𝘰𝘳𝘳𝘦𝘤𝘵 𝘢𝘯𝘺 𝘦𝘳𝘳𝘰𝘳𝘴 𝘰𝘳 𝘰𝘮𝘪𝘴𝘴𝘪𝘰𝘯𝘴 𝘶𝘱𝘰𝘯 𝘯𝘰𝘵𝘪𝘧𝘪𝘤𝘢𝘵𝘪𝘰𝘯.

Source:Dr.Navneet Kumar

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