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With the development of roller skating, roller skating has also been accepted by more and more parents, and its characteristics of health, sunshine, fashion and competition have also been widely recognized. Many parents have plans to let children touch and learn to roller skating. Many kindergartens, elementary schools, and middle schools have also opened various skating interest classes and special courses. In some places, almost all children have the degree of roller skates.
The skating sports that followed the skating equipment (mainly roller skates and 90A pu wheels for skate board) and the surrounding products industry have also arisen. Various brands and various types of roller skates are full of excitement. How should parents choose a suitable roller skating for their children? What about shoes?
We mainly introduce how to choose the first pair of children's roller skates for children. Special attention is given to how to choose children's roller skates, and how to choose the first pair of roller skates.
Parents should pay special attention to the wheels when choosing roller skates. The wheels are slippery and the wheels are very important! Don't choose PVC, which is the plastic wheel we often say. This kind of wheel is very hard, it is easy to slip without sliding on the ground, and there is no shock absorption. When the child is skating, the wheel is easy to wrestle, and the knees, spine and neck are subject to vibration and bumps, which can cause damage to the body.
When choosing roller skates, pay attention to the wheel selection PU (polyurethane) wheel, which is commonly known as the rubber wheel. Such wheels are also divided into multiple levels. However, the general PU wheels also has good grip and elasticity, it is not easy to slip and has the effect of damping.
How to distinguish between plastic wheels and PU wheels? When you hit the floor with wheels, the plastic wheel will make a relatively "clear" sound, and the sound of the PU wheel will be "dull". The wheels are dropped from the air to the ground, the height of the plastic wheel is very low, and the elasticity of the PU wheel is very good. As in the picture, the wheel on the roller skates is pushed on the ground, the plastic wheel does not have any resistance to slip, and the PU wheel is not so good to push away.
PU Wheels For Skate Board
Children love lighting things. Many skates have shiny wheels. Is this kind of wheel good? I recommend that when choosing roller skates, the number of green skateboard PU wheels on the shoe should not exceed two (one by one).
The flashing wheel illuminates by the friction of the core in the wheel to generate energy. Friction means resistance to sliding. For children who are just beginning to learn roller skating or are younger, using too many flash wheels can be a big burden, and it can be laborious to slide. This will increase the difficulty for your child to learn to roller skating!
As the child's first pair of skates, the number of flashing wheels on a pair of shoes should not exceed two. After the child is skilled in roller skating and has strength on his feet, it is not too late to change more flash wheels!
PU wheel is also called Pu filling wheel: strictly speaking, Pu is also a kind of plastic, only additives are added in the production process, so the performance is superior, and the production cost is also increased.
Features of Pu filling wheel: it has elasticity and can play a certain damping effect (even better than air filling wheel), good grip, not easy to slip, more wear-resistant and comfortable performance.
PU pulley for skate board has the advantages of wear resistance, oil resistance, corrosion resistance, solvent resistance, radiation resistance, acid and alkali resistance, ozone resistance, oxidation resistance, low temperature resistance, tear resistance, impact resistance, hydrolysis resistance, high elasticity, strong vibration absorption, excellent compression and buffer performance, and low compression deformation. Polyurethane products are widely used in textile printing and dyeing, national defense and military industry, mining machinery, construction machinery, chemical machinery, petrochemical industry, sports equipment, wood processing, printing machinery, metallurgical manufacturing industry, agricultural machinery and other industries.
Polyurethane elastomers are typical multiblock copolymers. The molecular chain is composed of flexible segments with glass transition temperature lower than room temperature and rigid segments with glass transition temperature higher than room temperature. Among them, oligomer polyols form flexible segments, diisocyanates and small molecular chain extenders form rigid segments. The block structure of flexible chain segment and rigid chain segment determines the particularity of its performance:
(1) the hardness range of common rubber is generally in Sauer a20-a90, the hardness range of plastic is about Sauer a95-sauer D100, and the elastic strength of polyurethane is as low as below Sauer A10, as high as Sauer D85, and no filler is needed;
(2) high strength and elasticity can be maintained in a wide range of hardness;
(3) excellent wear resistance, 2-10 times that of natural rubber;
(4) excellent water, grease and chemical resistance;
(5) high impact resistance, fatigue resistance and vibration resistance, suitable for high frequency flexure application;
(6) good low temperature resistance, low temperature brittleness about - 30 ℃ or - 70 ℃;
(7) it has excellent heat preservation performance. Compared with rubber and plastic, it has better heat preservation effect due to its low thermal conductivity;
(8) good biocompatibility and anticoagulant properties;
(9) excellent electrical insulation, mildew resistance and UV stability.
PU Wheels For Skate Board
Polyurethane elastomer is not perfect, its main disadvantages are:
(1) large internal heat generation and general high temperature resistance. The normal operating temperature range is - 40-120 ℃. If long-term action is needed under the condition of high frequency oscillation or high temperature, corresponding modification measures must be taken in the structural design or formula.
(2) it is not resistant to strong polar solvent and strong acid and alkali medium. At a certain temperature, alcohol, acid, ketone will make polyurethane elastomer swelling and degradation, chloroform, dichloromethane, dimethylformamide, trichloroethylene and other solvents will make polyurethane elastomer swelling at room temperature.
6 Light Clear K9 Crystal Chandelier NC1241P-6CR
Factory Professional on inner decoration item, products pass CE and ETL complete certificate. Factory focus on delivery date and products quality but also very important is service to keep good communication with clients.
Product Description Clear Crystal Luxury Chandeliers
Frame chrome plating from iron
K9 crystal in large and small sizes
Rated for three 40W max. E12/E14 candelabra base bulbs
Bulbs NOT included
If brighter light is preferred, consider an LED bulb with a higher lumen output.
Dimmer switch compatible
Clear Crystal Living Room Chandelier Can be hung on a vaulted ceiling
Hangs from an adjustable slender steel cable (included)
Canopy features Chrome finish
Dry UL listed: Inner Decoration Chandelier is suitable for use indoors in dry locations not directly exposed to excessive moisture and water Hardware; professional installation required
More information please view:https://www.nicelightingltd.com/
As an Auto Parts Wheel Bearing Factory, share with you.
1.Common causes of high bearing temperature:
1) Insufficient cooling, such as pipeline blockage, inappropriate use of cooler, and poor cooling effect;
2) Poor lubrication, such as insufficient lubrication or excessive lubrication, the quality of lubricating oil does not meet the requirements, deterioration or debris;
3) Large vibration, such as the poor alignment process of the coupling does not meet the requirements, the rotor has dynamic and static imbalances, poor foundation rigidity, virtual feet, rotating stall and surge;
4) The bearing is abnormal, such as bearing damage, the gap adjustment of each part of the bearing box does not meet the requirements, and the bearing assembly process is poor.
Bearings are high-precision objects, and the transportation path is far away. The storage requirements for imported bearings are very strict, regardless of temperature, moderation, and packaging. So what is the scientific way to store bearings? The Wheel Bearing Manufacturer will be announced for us below.
Scientifically store bearings, as long as the relative humidity of the storage room does not exceed 60%, and the temperature does not change much, the bearings can be stored in the original packaging for a long time. After long-term storage of bearings with sealing rings or dust covers, the characteristics of the grease in the bearings may be affected. Bearings taken out of the original packaging should be properly protected to prevent corrosion and contamination. The correct storage method for large rolling bearings is to place the bearings in a horizontal position, and the entire side of the bearing ring should be supported. If the bearing is placed in a vertical position, due to the relatively small thickness of the bearing ring, the weight of the bearing ring and rolling elements may cause permanent deformation of the bearing.
The scientific storage of bearings is very important. If improper storage leads to bearing rust or bearing corrosion, it is not good. Even if there is no surface damage, then it is possible that such and other failures may occur during the operation of imported bearings, so it must be Bearing storage should be taken seriously.
In order to ensure the long-term use of the bearing, and in order to maintain its proper performance, regular maintenance is necessary. The first thing to do is regular inspections. Regular inspections can help to find out the existing faults in time, and early detection and repairs can effectively prevent the occurrence of accidents, and can also help improve productivity and economic efficiency.
When storing it, the city should be careful not to damage the anti-rust coating that was originally provided when it was shipped from the factory. This can help to save effectively, and it is best not to get too wet and temperature if it is stored in a place Generally, it should be kept at about 20 degrees, and it is necessary to avoid direct sunlight as much as possible. In addition, some objects that are too low in temperature should not be touched as well.
Our company is also selling Wheel Bearing, please contact us.
As a Wheel Bearing Manufacturer, share with you. We know that once the bearing is rusted, it will affect the service life of the bearing, which will also endanger the working efficiency. It will also correspondingly increase the investment of enterprise business capital, so it is very important for enterprises to prevent bearing rust, so what are the methods?
Wheel Bearing Kits
1. A lot of bearing rust is due to the effect of moisture or strong acids and alkalis, which should be eliminated in time.
When we use diesel, we must choose the quality that meets the standard. It cannot be a poor quality product with too much water content, otherwise it will affect the bearing rust, and at the same time, we cannot wipe the bearing with strong acid and alkali, which can easily cause rust.
When the bearing is drenched in water, we should use professional motor oil or high-quality diesel for spitting, and then use a thicker plastic film to wrap it. At the same time, it is better to wrap a layer of kraft paper around it, which can prevent moisture, damage, and isolation. Air, so it will not rust.
2. Anti-rust method during transportation
Bearings are subject to rainy weather or harsh environments during transportation. It is easy to cause bearing rust. At this time, it is best to wrap the bearing to better achieve sealability, so that it will not be oxidized or corroded due to moisture. It is best to put a layer of plastic material on the outside of the package to prevent moisture from the bearing during transportation.
Therefore, in our daily use, during storage, or during long-distance transportation, the bearing should pay more attention to moisture and rust or corrosion and rust due to strong acids and alkalis. We must learn to seal the packaging. , Wrapped in plastic or kraft paper to prevent corrosion and rust caused by moisture. Mastering these methods is our reasonable protection of bearing material dependence, and at the same time also depends on ensuring the efficiency of work.
How to disassemble the bearing
It is necessary to carry out regular disassembly of the bearing, and regular disassembly of it is to facilitate its maintenance and check whether it is in any condition. If something goes wrong, it is time to replace it. Disassemble. There are special methods for bearings, which cannot be disassembled at will. If there is no installation and disassembly method, then it is easy to cause a certain degree of damage to the machine and bearings. When disassembling the bearing, pay attention to the use of special disassembly tools, and do not damage the components connected to it.
Our company also has Wheel Bearing Kits for sale, please contact us.
Prefab Space Frame Steel Structure Jiujiang Bridges
prefab space frame steel structure Jiujiang bridges
Truss structure, mild steel; Stainless steel, aluminum alloy 6082-T6 truss
Spray Painting; Galvanization;Powder Coated
Sliver, White , Darkgray; or as Client's Request
Hot Dip Galvanization or Painting
Light steel structure building Steel code
Q235-B; Q345-B; Stainless steel, aluminum alloy 6082-T6
Advanced Automatic Bolt /Welding Machines
1.Stable and Aesthetic
Jiujiang City Modern Steel Structure Engineering is a with national Steel Structure Engineering Contractor qualification, Light Steel Structure Building manufacturing level of qualification and architectural engineering design B qualification. We can also supply Custom service
China manufacture Fabrication steel structures for workshop warehouse hangar building
China manufacture steel structures for workshop warehouse hangar building
Steel column and beam
Q345B, welded H section steel
Q235, galvanizd C section steel
Aluminum alloy window
EPS sandwich panel sliding door
Design, Fabrication and Installation
We can make quotation according to customer's drawing or requirement; (size by length/width/height and wind speed), offering a free design drawing and all detailed drawings for installation.
Design software: Auto CAD,PKPM,MTS,3D3S, Tarch, Tekla Structures(Xsteel)V12.0.etc
According to customer's requirement
Load into 40/20GP,40HQ or 40OT
Structure Steel Warehouse advantages
1. Prefabricated. Fast and easy installation, time saving and labor saving.
Warehouse Wide span, single or multiple spans, can have a maximum span distance in 36m without middle columns. appearances, different colors for the walls and roof.
3. Light steel structure warehouse with light weight, easy move and cost saving.
4. Removable, convenient to assemble or disassemble. Fast construction and easy installation.
5. Environmentally, recycle, no waste produced.
6. High strength, can resistance grade 8 earthquake. water proof, fire proof; can resists strong wind and heavy snow.
7. Long life span. can be used for more than 50 years.
8. Customized design, can make quotation according to customer's drawing or requirement.Jiujiang City Modern Steel Structure Engineering is a with national Steel Structure Engineering Contractor qualification, Light Steel Structure Building manufacturing level of qualification and architectural engineering design B qualification. We can also supply Custom service.
100sqm-10000sqm Steel Structure Hangar/Warehouse
Jiujiang City Modern Steel Structure truss has features of high fire resistance, strong corrosion resistance.
1) Main Steel: Q345, Q235, Q345B, Q235B etc.
2) Column & Beam: Welded or Hot rolled H-section
3) Connection method of steel structure: welding connection or bolt connection
4) Wall & Roof: EPS, Rockwool, PU sandwich, corrugated steel sheet
5) Door: Rolled up door or Sliding door
6) Window: Plastic steel or Aluminum alloy window
7) Surface: Hot dip galvanized or painted
8) Crane: 5MT, 10MT, 15MT and more
Drawings & Quotation of Steel Structure Warehouse custom:
1) Customized design is welcomed.
2) In order to give you an exactly quotation and drawings, please let us know length, width, eave height and local weather. We will quote for you promptly.
The roof and wall can be made of composite panel or veneer. Galvanized sheet metal can prevent rust and corrosion. The use of self-tapping screw can make the connection between the plates more closely, to prevent leakage. You can also use composite panel for roof and wall. The sandwich is polystyrene, glass fiber, rock wool, polyurethane. They have good thermal insulation, heat insulation, fire-retardant. The wall of the steel structure maintenance also can use brick wall. The cost of a brick wall is higher than galvanized steel roof and wall.
We are a with national steel structure engineering contractor qualification, steel structure manufacturing level of qualification and architectural engineering design B qualification, set light steel and heavy steel structure engineering, Pre Fabricated Steel Building Structures, design, production, construction and installation as one of the central China strength steel construction enterprises.Jiujiang City Modern Steel Structure Engineering is a with national Steel Structure Engineering Contractor qualification, Light Steel Structure Building manufacturing level of qualification and architectural engineering design B qualification. We can also supply Custom service.
Modern Design Prefab Steel Structure Large Stadiums
Modern Steel Structure designs & delivers all types of steel structures in various options for stadiums, grand stands, ramp buildings, roof covers and other services
Factory direct supply Modern design prefab steel structure large stadiums
Modern Steel Structure truss, Spatial Grid Structure, Light Steel Structure, Steel Structure Molding etc
Steel Q235B & Q345B
As per requirement of customer
As per design
Light steel structure building Surface Treatment
Painting & Galvanizing available
Warehouse, Workshop, Multi story Building, Building Roof etc
Suitable for Shipment
High quality Modern Steel Structure custom designs & delivers all types of steel structures in various options for stadiums, grand stands, ramp buildings, roof covers and other services:
Concourse can be designed all around the large steel structure stadiums, so that it makes much easier, and safer to enter and leave the stadium.
Integration of elevators for easy movement for spectators
Securing large structures for signs and adverti
Open air design with a roof system Jiujiang City Modern Steel Structure Engineering is a with national Steel Structure Engineering Contractor qualification, Light Steel Structure Building manufacturing level of qualification and architectural engineering design B qualification. We can also supply Custom service.