Category: News

Originally developed in 1919 by an SKF engineer, Arvid Palmgren, the spherical roller bearing (SRB) has since made its mark worldwide.

Created to complement the self-aligning ball bearing, due to its ability to accommodate misalignment under heavy loads, the initial SKF design has now become part of the largest family of products in the industry.

On the fabled Las Vegas Strip in the US, the High Roller Ferris wheel contains two of the largest SRBs ever produced by SKF, each weighing in at 8.8 tons. SKF spherical roller bearings can be found in many applications, including somewhere you might not expect them.

A good example is the Bahrain World Trade Center, where three tower wind turbines, each 29 meters in diameter, are architecturally installed between the two 240-meter-high (50-storey) towers and generate 1,300 MWh per year. The main shafts of the turbines were equipped with SKF spherical roller bearings. The turbines went online in March 2008 and are operational 50 percent of the time, depending on wind conditions. Another alluring application fitted with SRBs is the rebirth of the Zeppelin after 60 years of absence following the Hindenburg disaster. SKF was brought in by ZF, the gearbox manufacturer for the Zeppelin NT, to help the new and improved airships to propel forward.

SKF’s SRB range delivers a range of benefits for specific operating conditions. For example, operators in contaminated environments in heavy industrial applications have increased their bearing rating life by up to four times with sealed SKF spherical roller bearings. Those working in the harshest of environments have benefitted from SKF’s Three-Barrier Solution that delivers cost-effective, optimized rating life, minimal maintenance spherical roller bearings. New dimension gearbox design has even become possible thanks to SKF Explorer SRB’s long service life and high performance.

Petra Öberg Gustafsson, Product Line Manager Self Aligning Bearings at SKF comments: “From the very start, SKF has taken the lead in the development of self-aligning bearings. We introduced spherical roller bearings in 1919 and have been consistently improving them ever since. Building on Arvid Palmgren’s original design, we now offer engineers the widest range of both open and sealed spherical roller bearings in the industry. With the continued push for high performance in ever more challenging environments, it will be interesting to see what the next 100 years of development generates!”

SKF
www.skf.com

The bearing installations to two Calm Buoys operating offshore Libya are indicative of the wide-range of applications Thordon’s environmentally-safe bearing systems have outside the company’s traditional maritime market.

A total of 48 bearings and bushings were supplied in 2014 for installation to the chain stoppers of Monobuoy’s innovative 400t turntable Calm Buoys, a single point mooring system designed to allow oil tankers to load and offload cargoes offshore, without having to berth alongside the refinery. However, the ensuing Libyan conflict resulted in the project being postponed until late last year, when they finally entered service.

“Despite the delay, construction and commissioning went very well,” said Monobuoy’s Andrew Charlton. “We have used Thordon bearings on two or three projects in the past. There are not many suppliers of these types of bearings, but we find Thordon offers a more simplified design and is easier to work with. When we have projects like this we tend to give Wenex a call to help during the design phase and assist with the calculations.”

Thordon’s authorized distributor in France, Wenex, calculated the load on each bearing, a crucial element in optimising the design of the Calm Buoys in line with the customer’s requirement.

Having a 39.4-ft diameter hull, the Calm Buoy can accommodate 4, 6 or 8 chain legs. An innovative and compact 40t chain pulling winch is fitted, making the buoys easy and quick to install. Single or multi-path swivel stacks can also be fitted with utility swivels to power and control subsea valves.

For each of the buoy’s chain stoppers Wenex recommended 32 abrasion-resistant ThorPlas-Blue bearings, due to their ability to pivot with the anchor chain. Thordon also supplied 16 SXL entry chafe bushings that were installed to provide a greater level of wear resistance to the anchor chain, while 32 SXL thrust washers were supplied to help reduce the side-to-side motion of the Calm Buoy during inclement operating conditions.

“There is a willingness with Thordon Bearings to work with companies and come up with specific solutions for applications outside of the norm,” said Charlton. “We are very pleased with the technical support Thordon and Wenex provide.”

Benoit d’Alançon, Managing Director, Wenex, said: “This was an important project for us. Calm Buoy projects like this are relatively rare in France, where Thordon bearings tend to be specified for use in the renewable energy sector, subsea turbines and river dams. We are delighted that Monobuoy’s system is now successfully operating offshore Libya.”

One recent renewable energy project included the installation of Thordon bearings for the main turbine shafts of the 2MW OCEAN_2G tidal energy platform launched by Spain’s Mgallenes Renewables last year in Vigo bay, Spain.

A specialised stainless steel cladding solution was chosen to protect the 600mm (23.622-in.) diameter shaft, and Thordon’s COMPAC elastomeric polymer alloy bearings were selected to ensure the longest possible life in an unpredictable and demanding open ocean environment.

George Morrison, Thordon Bearings’ Regional Manager, said: “We are seeing increasing interest from industrial sectors outside our core maritime markets, particularly the mining, offshore and renewable energy sectors. Any rotating machinery can benefit both commercially and technically from our range of unique grease-free and water-lubricated polymer bearing solutions.”

Thordon Bearings
thordonbearings.com

In the five years since Vesconite Bearings introduced a minimum of two layers of corrugated cardboard packaging around each of its dispatched polymer bushings and rods, the company has had no returns from breakages due to transportation.

The company instituted this as a packaging standard after a complaint by a customer led it to investigate its packaging policies.

Vesconite Bearings then decided that －if stock items could not be packed into rigid tube-like cores －rods and bushings would be placed in corrugated board, with the ends folded and taped for protection.

Rods and bushings would be further wrapped in corrugated cardboard, so that cardboard would provide additional packaging.

For airfreight packaging, the package would be included in a box where it weighed less than 20kg and secured to a pallet if the box or set of boxes weighed more than 20kg, to ensure easy handling.

The company believes that this set of packaging policies ensures customer satisfaction since corrugated cardboard, with an arched paper that fits between two liners, can carry a range of weights, protect against moisture, and is a sustainable, recyclable packaging solution.

“We have entered a new era in which you never get any returns as a result of breakages during transportation,” enthuses stores manager Martin Nyathi.

“Our packaging prevents cracking and breaking so that customers receive their orders intact,” he says.

Vesconite Bearings
www.vesconite.com

Marseille winger Florian Thauvin and his entourage will meet with the club immediately after the season ends to open talks over a contract extension and a wage hike, according to Foot Mercato.

The 24 year old has enjoyed the best season of his career to date, scoring 15 goals in Ligue 1.

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Glasgow Warriors boss Franco Smith has been named the United Rugby Championship (URC) Coach of the Season in his first campaign in charge of the side.

Smith joined Glasgow at the start of the 2022/23 campaign, replacing Danny Wilson.

Franco Smith’s debut season

The 50-year-old former Springbok led the Warriors to the Scottish x Italian Shield and a top-four finish in the league and guided them to their first European final.

Glasgow also went the whole URC regular season unbeaten at Scotstoun, with their only defeat in any competition at home being the 14-5 URC quarter-final loss to Munster.

Glasgow won 13 of their 18 URC regular season matches in 2022/23, a vast improvement on their 2021/22 campaign, where they won just 10.

They also claimed a try bonus point on 11 occasions and scored 72 tries in total, 19 more than they did in their previous campaign.

Their debut season under Smith’s tutelage ended last Friday when they were beaten 43-19 by Toulon in the final of the Challenge Cup.

“This is season one for this group. This is not the end for us, this is just the start. It’s a stepping stone,” he said after the defeat.

Smith joined Glasgow after a stint as Italy ahead coach and previously coached Benetton between 2007 and 2013.

He was also the assistant coach and head coach of the Cheetahs and worked with the Springboks during that time.

URC Awards 2022/23 Winners

OFX Top Try Scorer: Tom Stewart (Ulster)
Tackle Machine: John Hodnett (Munster)
Turnover King: Thomas Young (Cardiff)

Elite XV: 15 Kurt-Lee Arendse (Bulls), 14 Darcy Graham (Edinburgh), 13 Sione Tuipulotu (Glasgow Warriors), 12 Daniel du Plessis (Stormers), 11 Simone Gesi (Zebre Parma), 10 Ross Byrne (Leinster), 9 Grant Williams (Sharks), 8 Gavin Coombes (Munster), 7 Scott Penny (Leinster), 6 Vaea Fifita (Scarlets), 5 Federico Ruzza (Benetton), 4 Niall Murray (Connacht), 3 Finlay Bealham (Connacht), 2 Dan Sheehan (Leinster), 1 Steven Kitshoff (Stormers)

Next-Gen Player of the Season: Tom Stewart (Ulster)
Vodacom Fans’ Player of the Season: Manie Libbok (Stormers)
Try of the season: Joaquin Riera (Benetton v Sharks, Round 17)
Gilbert Golden Boot: Johan Goosen (Bulls)
Ironman: Quan Horn (Lions)
BKT Coach of the Season: Franco Smith (Glasgow Warriors)

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Premier League side Manchester United have initiated contacts over the possible signing of PSG winger Lucas Moura, according to Sport Witness.

Moura, whose future at Les Parisiens will depend on whether or not manager Unai Emery keeps his job, because if he does, then Lucas will likely seek to leave, is apparently the type of speedy winger that José Mourinho is looking for in order to have a complete squad for next season.

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The media outlet claim that talks are at a very baby stage at the moment.

Ⅰ. The diameter of the extruder screw (D)

1. It is related to the required injection volume: injection volume per mold = 1/4 × π × D² × S (injection stroke) × density × 0.85.

2. Generally speaking, the diameter D of the extruder screw is inversely proportional to the highest injection pressure and proportional to the plasticizing capacity.

Ⅱ. Conveying of extruder screw

1. Responsible for the transportation, pushing and preheating of the plastic. It should be preheated to the melting point.

2. Crystalline plastics should be longer (such as: LCP, PA), followed by non-crystalline materials (such as: PS, AS, ABS), and the heat sensitivity is the shortest (such as: PVC).

Ⅲ. Compression section of extruder screw

1. Responsible for plastic mixing, compression and pressurized exhaust. The raw materials passing through this section have been almost completely dissolved, but may not be uniformly mixed.

2. In this area, the plastic gradually melts. The volume of the screw groove must be reduced accordingly to correspond to the reduction of the entire volume of the plastic geometry, otherwise the material will not be compacted, the heat transfer will be slow and the exhaust will be poor.

3. Generally, it accounts for 25%~30% of the working length of the extruder screw, but the compression section of the nylon (crystalline material) screw accounts for about 15% of the working length of the screw. Plastic screws with high viscosity, fire resistance, low conductivity and high additives account for 40%-50% of the working length of the screw.

Ⅳ. The metering section of the extruder screw

1. It generally accounts for 20-25% of the working length of the screw to ensure that the plastic is fully melted, the temperature is uniform and the mixing is uniform.

2. If the metering section is long, the mixing effect is good. However, if it is too long, the melt will stay too long and cause thermal decomposition. If it is too short, the temperature will be uneven.

3. Heat-sensitive plastics such as PVC should not stay for too long to avoid thermal decomposition. Use shorter metering segments or no metering segments.

Ⅴ. The depth of the feeding groove of the extruder screw and the depth of the measuring groove

1. The deeper the depth of the feeding screw groove, the greater the conveying volume, but the strength of the screw needs to be considered. The shallower the measuring screw groove depth, the higher the plasticizing heat generation and the mixing performance index. However, if the depth of the metering screw groove is too shallow, the shear heat will increase and the self-generated heat will increase. If the temperature rise is too high, it will cause discoloration or burning of the plastic, which is especially bad for heat-sensitive plastics.

2. Measuring screw groove depth=KD(0.03-0.07) ★D. When D increases, the smaller value of K can be selected.

Our conveying screw element is a self-sweeping extruder screw assembly, which opens longitudinally and closes laterally and has a strong conveying effect. It has short material residence time, good self-cleaning and can build up high pressure in a short axial distance.

The conveying element is mainly of threaded construction. Its function is to transport the material and give the material a certain thrust, so that the material can overcome the resistance encountered in the flow channel. Conveying screw elements are currently the most popular extruder screw elements. It has strong conveying function, short residence time and good self-cleaning.

In terms of production specifications, LESUN not only provides general extruder screws and standard twin screw extruder accessories produced by manufacturers, but also provides design and manufacturing services for special extruder accessories according to customer requirements. At the same time, we also provide surveying and mapping business and processing business of accessories for major extrusion press companies. If you are in need, welcome to contact us.

Ruiyi Model is a professional Chinese plastic injection molding company. We mainly provide manufacturers of custom plastic injection molding, plastic injection mold design and plastic injection molding.
Today, we will discuss how to find a custom manufacturer of plastic molded products.
Plastic is a very important compound in our daily lives. Computer accessories, toys, kitchen utensils and many other household items we use every day are shaped. The forming process is not difficult to understand. In simple terms, it involves transferring liquid plastic into a mold, then allowing it to cool and form the desired product.

For example, plastic molding can be used to make toys. After this is done, the molten liquid plastic is inserted into a mold shaped like a toy and then cooled. You can use the same process to create other types of molded products, such as advertising products and signs.
As a very technical process, plastic molding should be done by a reliable manufacturer. When choosing someone to design your plastic molded product, there are two factors to consider.

Type of molding process used. When using plastic products, there are several types of molding processes. Injection molding is one of the most common processes and is commonly used for the mass production of plastic products such as mobile phone accessories and toys. Compression molding is another popular method for producing molded products. Unlike injection molding, it uses a vertical press. Over the years, rotational molding and structural foam molding have also become increasingly popular.
The location of a custom manufacturer is important because it will help you save a lot of money. In many cases, you will need to transport molded parts for assembly and packaging. If the manufacturer you choose is not in your jurisdiction, you will have to pay substantial shipping costs. Choosing a manufacturer that is not easy to find in your area also brings inconvenience and increased delivery time. Bringing the production of molded parts closer to your industry can really help reduce costs and time.

Consider how much time it takes to get a molded product, and different companies offer different turnaround times, and you need to consider this information when choosing a manufacturer. The more time it takes to prepare a molded part, the more it costs and time to get the final product. If you’re going to rely on molded products to make the final product, it’s important to choose a manufacturer that can deliver within a specified time frame.
Ask them to provide you with a schedule of the different processes involved in the molding process, including design, prototyping, changes, and production. In order for the molded part to be completed on time, the design should be completed within the required time so that a prototype can be made and any required changes made before the product is sent to the customer.

What shipping methods do they offer?
You need to determine how the molded parts are shipped and delivered by the manufacturer. When you are ready, you want to make sure they arrive at your location as quickly as possible so they can continue production. Reliable molding companies will offer multiple shipping options so you can choose the shipping option that best fits your product. Some of them have a large number of trucks that provide delivery services to customers in their area. If you can find a custom molded parts manufacturer that provides manufacturing and assembly, packaging, and shipping services, you will be able to reduce costs and increase lead times. Before you register, take the time to find the right manufacturer and ask all questions about their services.
As a very technical process, plastic molding should be done by a reliable manufacturer.

Rinku Singh has been a sensation this year. This IPL season, he became the young star everyone followed closely. From hitting five sixes in five balls to being Kolkata Knight Riders’ spine in the middle overs, the UP batsman has had a great run. In a chat with The Indian Express, Singh talks about his last two months of IPL and how the great actor Rajnikanth invited him to his place.