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THE Shielded cable
The purpose of cable shielding is to ensure the transmission performance of the system in the environment with electromagnetic interference. The anti-interference here should include two aspects, namely, the ability to resist external electromagnetic interference and the ability of the system itself to radiate electromagnetic interference. Today, let's learn about some characteristics and differences between wound shielded and braided shielded cables. Let's have a look.
The wire and cable shielded by winding has the characteristics of small outer diameter, soft wire and low price. This way is more suitable for low-frequency shielding. The cable shielded by braiding can usually improve the interference defense of wires and cables. Due to the good characteristics of high-frequency shielding, it is more suitable for high-frequency shielding. The shielding effect can be further improved by multi-layer wire and cable shielding.
The first、 Winding shield wire
1>. In terms of shielding effect, winding is not as good as weaving;
2>. Its shielding effect is directional;
3>. The shielding characteristics change when bending.
The second、 Braided shield wire
Weaving is similar to oblique wrapping. It mainly plays a shielding role in the wire material to prevent the influence of external electric field and magnetic field.
Compared with oblique package and aluminum foil, it has the following characteristics:
1>. Shielding has no directionality;
2>. Good high-frequency shielding characteristics, suitable for high-frequency shielding;
3>. Through multi-layer shielding, the shielding effect is excellent and the safety is high;
4>. There is no change in shielding characteristics during bending.
THE Aluminum alloy cable
www.rfcable.com.cn/en
At present, copper core cable occupies an absolute advantage in the power cable industry. In contrast, aluminum alloy cable develops slowly. However, in recent years, due to the lack of copper resources and the rising price of copper, cable manufacturers have gradually turned their attention to aluminum alloy materials. So, what are the differences between aluminum alloy cable and copper core cable? Now let's talk about some advantages of aluminum alloy cable in terms of cable installation and construction.
1. Bending property
The bending radius of aluminum alloy conductor cable is 7 times of the cable diameter, while that of copper conductor cable is 10 ~ 20 times of the cable diameter. Aluminum alloy cables are easier to bend during installation, so it can effectively reduce installation cost and accident risk.
2. Anti elasticity
The rebound performance of aluminum alloy conductor is 40% less than that of copper (under the same room temperature, the stress is released after bending both aluminum alloy conductor cable and copper conductor cable for 90 °, and the rebound angle of aluminum alloy conductor cable is only 0.6 times that of copper conductor cable). The rebound stress caused by conductor during installation will be greatly reduced for construction convenience.
3. Flexibility
The flexibility of aluminum alloy conductor can be 25% higher than that of copper, with good plasticity, high fatigue strength and easy processing and forming. The bending times are much higher than those of pure aluminum and copper conductors. After repeated bending, there will be no crack or fracture, which can improve the safety of cable line.
4. Elongation
Elongation is not only a sign of the quality of the cable and the size of the external force, but also an important index to test the mechanical properties of the cable conductor. After annealing, the elongation of aluminum alloy conductor cable can be increased to 30%, while that of copper conductor cable is 25%. It can be seen that the aluminum alloy cable has stronger flexibility than the traditional copper cable, so the tension required for laying is much smaller than that of copper cable.
Rifeng XLPE insulated power cable
Cross-linked polyethylene insulated power cable, so the name suggests, its insulating medium material uses cross-linked polyethylene. Cross-linked polyethylene material is that after the steam cross-linked polyethylene, its molecular structure is transformed into a three-dimensional network structure, which turns the thermoplastic polyethylene into a thermosetting cross-linked polyethylene, which greatly improves the heat resistance and mechanical properties of the material , And maintains excellent electrical performance. The relevant parameters of the XLPE insulated power cable are as follows:
01 Product Usage
It is suitable for power transmission and distribution in urban power grids, mines and factories with rated voltage of 6-35KV.
02 Product Standards
It is produced in accordance with the GB/T12706-2008 standard equivalent to the IEC60502-2004 standard.
03 Product Features
(1) When the cable is laid under the condition that the ambient temperature is not lower than 0℃, there is no need to pre-heat it. The cable laying drop is not restricted.
(2) The maximum rated temperature of the cable conductor is 90℃;
(3) When the core is short-circuited (the longest lasting 5S), the temperature shall not exceed 250℃.
(4) The minimum bending radius during cable laying is specified as follows:
Single core cable: 20(d+D)±5%;
Three-core cable: 15(d+D)±5%.
Where: D is the actual outer diameter of the cable, and d is the actual outer diameter of the conductor.
Main features of wind power cables
Wind power cable is an important part of wind power transmission, and its safety and reliability directly determine the operating life of the wind power generator. In our country, most of the wind farms are located in coastal, mountainous or Gobi areas with low population density, and the special environment also puts forward higher requirements on the performance of wind power cables.
Wind power cables must have good insulation properties to resist wind, sand, salt spray, etc.
The cable must have anti-aging, anti-ultraviolet properties, and should have a long enough creepage distance in high altitude areas.
It has excellent weather resistance, can withstand high and low temperatures, and can withstand the "thermal expansion and contraction" of the cable itself. The operating temperature of the cable conductor can withstand the temperature difference between day and night of -40℃-70℃.
Possess good torsion resistance and bending performance.
Good waterproof and sealing performance, with oil resistance, chemical corrosion resistance, flame retardant and other properties;
For more details about Wind power cable please click here to access the webpage provided by listing owner.
Guangdong Rifeng Cable Co. Ltd.-product certification
Started in 2009, Guangdong Rifeng Cable Co. Ltd. is specialized in research and development, design, manufacturing and sales of rubber-sheathed cables as core products. Its products have been used widely in air conditioning, home appliances, wind power generation, new energy, high-end equipment manufacturing, building machinery, port machinery, petrochemical industry, marine engineering, vehicles and vessels, robot and power-driven tools. Rifeng currently has facilities of more than 200,000 sq. meters . It has more than 30 patents granted by the state and been successfully listed at Shenzhen Stock Exchange under the code 002953 on May 9th, 2019.
Rifeng Enterprise has passed ISO9001:2015 Quality Management System Certification, ISO14001:2015 Environmental Management System Certification, IATF16949:2016 Quality Management System Certification.
Rifeng’sproducts have passed China CCC, France NF, UK ASTA, UK BSI, German VDE, German TUV, EU CE, EU CPR, US UL, US ETL, US MSHA, Canadian CSA, Australia SAI &SAA, Korea KTL, Japan JQA &PSE, Saudi SASO, Brazil INMETRO, India BIS, BV Classification Society, CCS Classification Society, India ISI, China National Industrial Products Production License and product certificationsof the other countries and regions.
For more details about this listing please click here to access the webpage provided by listing owner.
Electric welding machine cable
Electric welding machine cable is commonly known as welding handle wire, which is a special cable used for connecting the secondary side of electric welding machine and connecting electric welding pliers and electric welding machine.
Electric welding machine cables are divided into many types according to different use occasions, but most of them are single-core, the conductor material is oxygen-free copper, and the copper wire has a small diameter and a large number of wires.
YH cable is the most common type of electric welding machine cable, and its characteristics are: large current and low voltage. The following uses Rifeng YH cable as an example to introduce the use characteristics of electric welding machine cables.
1. Brief introduction of YH welding machine cable
YH, the full name is rubber sheathed flexible cable for mobile electric welding machine, also known as welding handle wire. Y stands for mobile. H stands for electric welding machine.
2. Use characteristics of YH electric welding machine cable
The cable structure of YH electric welding machine is a single-core cable made of multiple strands of flexible conductor, and the conductor is made of high-purity oxygen-free copper. The copper core has bright appearance, low resistivity, good conductivity and high safety.
YH cable works under low voltage (maximum voltage is 200V) and high current conditions, so it has a certain degree of resistance.
The motor lead wire cables are frequently moved, twisted and cast, requiring softness and good bending performance.
It is easy to be scratched and rubbed by sharp steel components during deployment, so the cable insulation is required to have good mechanical properties such as tear resistance and abrasion resistance.
The use of complex environmental conditions, such as sunlight, water boiling, contact with muddy water, machine oil, acid and alkali liquids, etc., requires a certain degree of weather resistance, oil resistance, and solvent resistance.
Sometimes hot welding parts are encountered, requiring good heat deformation resistance.
Frequent movement requires small outer diameter and light weight.
Basic characteristics and uses of reel cables
1. What is a reel cable? What is the purpose of the reel cable?
Drum cables are mostly used for flexible connection and control cables for hoisting lifts, stackers and reclaimers, dumpers, dumpers, mixers, port machinery drums, rock drilling rigs, roadheader drums, and electric scrapers At the same time, it can also be used as a winding and towing cable in the drag chain system. The cable reel is guided by the tow shaft or other similar devices for retracting movement. The reel cable can be installed in a dry or humid indoor or humid industrial environment, and can also be used for outdoor installation.
2. What are the basic characteristics of the reel cable?
1. Small bending radius: The working mode of the reel cable often needs to withstand long-term bending motion, so this kind of cable requires a small bending radius in use, which requires the cable material to have high flexibility and small outer diameter.
2. Excellent tensile and abrasion resistance: Since the working principle of the reel is rotation, winding, and pay-off, the reel itself is generally retracted and rewinded under constant tension, which has higher requirements for the tensile strength of the cable.
3. Rolling pressure resistance characteristics: most of the winding cables are single-track or multi-layer stacking, which puts forward higher requirements for the extrusion resistance of the reel cable itself.
4.Other characteristics of the reel cable: extremely strong mechanical load bearing capacity, oil and water resistance, UV resistance, general acid and alkali smoke prevention, anti-cracking, etc.
The 13 Best Fitness Trackers and Watches for Everyone
LIKE EVERY PIECE of gear you wear on your body day in and day out, fitness trackers are incredibly personal. Not only do they have to be comfortable and attractive, but they must also accommodate your lifestyle, as well as when and how you like to work out. Do you bike, row, or do strength training? Do you run on trails for hours at a time, or do you just want a reminder to get up every hour?Get more news about Fitness Watch Factories,you can vist our website!
No matter what your needs, there's never been a better time to find a powerful, sophisticated tool that can help you optimize your workouts or jump-start your routine. We've tested dozens over the past four years to bring you these picks. While you're at it, don't forget to check out our guides to the best smartwatches and best running gear.
Even as Fitbit has faced stiff competition from other manufacturers—most notably, the Apple Watch—its trackers have always won me over. They hit a very specific sweet spot between attractiveness, affordability, accessibility, and ease of use. They're perfect for everyone who isn't an ultramarathoner or a semi-pro powerlifter trying to hit a PR.
The Charge line has consistently reached the top of our rankings, and the Charge 5 (8/10, WIRED Recommends) is no exception. This year's iteration has softer lines, a bright AMOLED screen, and almost every sensor you could want, from stress scans to ECGs. Like the Apple Watch does with iPhones, the Charge 5 fast-pairs to Android phones and has both onboard and connected GPS so you can track outdoor workouts without a hitch. You do still have to pay $10 per month for a Fitbit Premium subscription to access the new Daily Readiness feature and personalized sleep and stress insights, but the hardware is still less expensive, and the subscription cheaper, than others on this list.
For several years, one version or another of Fitbit's Versa line has occupied this spot. But now that Garmin has its own entry-level, square-shaped tracker, the Venu Sq (8/10, WIRED Recommends) edges out Fitbit's latest Versa and Sense wearables. It has the Fitbit's accessible price that we like, but with Garmin's accurate and granular fitness data added.
The Venu Sq comes in a variety of attractive colors, with a bright and responsive LCD touchscreen that has an always-on option. And while many of its competitors have been offering blood-oxygen monitoring and sleep tracking only as premium features, Garmin has includes those features in its more basic trackers and doesn't require you to subscribe to its paid software service to unlock the features. You also don't need to pay a subscription fee to access Garmin's advanced metrics through Garmin Connect.
Letsfit's smartwatch is a knockoff of the Fitbit Versa, right down to the typeface used on the watch face, but the differences are obvious to anyone who has used (and loved) a real Versa. The latch is made from cheap plastic, the tracked metrics on the watch face are rudimentary, and the VeryFitPro app is unattractive and not a joy to consult.
However, the tracker is waterproof and the pedometer is reasonably accurate. The battery lasts about one week between charges, and the band is soft and comfortable. If you want an even cheaper, simpler tracker, I like the comfortable, waterproof Xiaomi Mi Band ($49), which also has a long-lasting battery. If you're willing to spend a little more, look for older Garmin or Fitbit models that came out a year or two ago. Those regularly go on sale for well under $100.
Step-By-Step Multi-Wall Paper Bag Manufacturing Process
Multi-wall paper bags are used to transport and store dry flowable bulk materials. The paper shipping sack originated over a century ago. Today billions of units are produced and filled each year. Variations of the industrial paper bag include the pasted valve bag, pinch bottom open mouth bag, self opening satchel bag, and the sewn open mouth bag. Get more news about paper bag machine,you can vist our website!
There are two basic types of paper bag: Open Mouth and Valve. An open mouth bag is a tube of paper plies with the bottom end sealed. The bag is filled through the open mouth and then closed by stitching, adhesive, or tape. Valve bags have both ends closed (pasted) and are filled through a valve.
Multi-wall bags are made up of 2-6 layers (plies) of paper and film. Paper plies are generally kraft or extensible paper. For bags requiring moisture or grease protection, a layer of plastic film may be added to the paper plies. The paper itself can also be coated with a thin layer of film. Flexographic Printing - A flexographic press uses photopolymer plates, either digital or conventional, mounted on a printing cylinder.
This process uses very fluid, fast drying solvent or water-based inks. It is especially adaptable to high speed, low cost, in-line printing.
Step 2: Tubing
The initial production of a paper bag occurs on a tuber, a machine which takes several rolls of paper and other materials and combines them over a rigid former into a flat or gusseted tube (a tube with creases or folds in the sides not found in flat tube bags), bonded together with adhesives. Tuber speeds typically run from 150 to 250 feet per minute.
Step 3: Bottoming
The tubes are then taken to the bottom-forming operation as required by the particular specification of bag they will become. The tubes are placed in bundles on automatic feeders which deliver them one at a time at speeds of 30 to 50 bags per minute.
The valve bag is pasted closed at both ends during manufacture with only a corner opening or valve at one end, through which the bag is filled.
Step 4: Palletizing/Drying
Finished bags travel through a metal detector to assure the absence of contaminants. Bags are then palletized and dried prior to final shipment.
Your guide to food packaging
In a competitive landscape like the food industry, it is important to get the packaging right. This isn’t just for practicality, but to keep a competitive edge on busy supermarket shelves. Here, Debra Weiss explains what type of packaging manufacturers should be looking for, what types should be avoided, and how best to keep ahead of the pack.Get more news about Food Packaging,you can vist our website!
Whether it’s your favourite chocolate or those free time snacks, it is the packaging that attracts you first. Food packaging not only makes a product stands out on the shelf but it also protects them from chemical, physical and environmental factors that can contaminate them. Therefore it is important to know the right packaging types and to follow the latest packaging trends to stay competitive.
Packaging preserves food quality as well as attracts customers. Most customers are likely to judge the food quality from the package. While the primary role of food packaging is to contain a portion of food, here are some other key benefits:
Protection: Packaging companies design a unique package that can be ideal for the type of food. Companies conduct a lot of research to get the best ideas for useful packages that can protect the product from chemical reactions, light, and dust. Improper food packaging affects the quality and taste of a product.There are diverse types of food packaging around us, from cans, bags, and boxes to bottles. The food products are packed in these containers so that they remain safe during transportation.Influencing consumer purchasing habits: The colours and style of your food packaging play a vital role in influencing the consumer’s buying decision. After all, the brain reacts to colours in different ways, so choose your packaging colours wisely. For example, white packaging conveys simplicity and purity, making them great for dairy products. Orange packaging stands for energy and fun, making them ideal for sports drink and summer beverages. Also, match colours and flavours, like yellow for bananas and red for apple. Fonts have also an important role to play. Make sure they are readable to your target audience.
Making your brand stand out: There are hundreds of products on the shelves of supermarkets so your product should capture a customer’s attention. Packaging helps with this as it differentiates your brand from similar products on the same shelf.
Product packaging is also a great marketing tool. From the label, logo to the shape of your food’s packaging, a customer can remember your brand next time they come to store. This way, packaging builds brand recognition.Which packaging goes well with your food products? Well, there are many types to choose, from glass, paper, corrugated to plastic. However, not all food packaging is the same. All have their benefits and some downsides as well.