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coil (2)

Identification Method of PVC Coil Carpet

  1. Whether to sell in an exclusive shop or not. When choosing vendors of PVC coil carpet, consumers should pay attention to check whether they have formal certificates of authorization, international quality certificates, certificates of environmental label products in China, and authoritative certificates issued by functional departments in China; whether they have formal inspection reports (some commissioned inspection reports are not true, what we want to see is supervision and inspection or daily spot inspection reports), and at the same time, they should also check whether they have regular inspection reports. It should be noted whether the report is original.

 

  1. Look at the information and Atlas of PVC coil carpets. Those improper words, such as rough printing, poor content, the alleged wear resistance of 18 thousand kilometers and so on, are misleading propaganda and are acted by non-standard manufacturers.

 

  1. Whether there is a manufacturer or a marketing agency to regulate the retail price, whether it belongs to the product of arbitrary price, if this is the case, it can not be PVC floor having a brand.

 

  1. Look at the surface pattern of a PVC coil carpet. The surface texture of the carpet is blurred, and the color is not correct, and it is unnatural, and it can not resist ultraviolet radiation, and it is easy to fade and so on, which are undoubtedly low-quality PVC coil carpets.

 

  1. Look at the carpet core. PVC flooring with rough core, dark color and edges, and corners easy to break; formaldehyde content exceeds the national standard of high-quality products; most of the floor comprehensive indicators are not qualified, which belongs to inferior products.

 

  1. Look at the polishing degree of PVC coil carpet. When the carpet surface is polished with woodworking sandpaper, the low-quality counterfeit products show signs of whitening, which is lower than the national standard wear-resistant requirements.

 

  1. Look at the mosaic effect of carpets. Sample a pack of PVC coil carpets and lay three pieces staggered. Such carpets are inferior products because of the difference in height and triangular seam and the irregular edge.

 

  1. Look at the bottom of the PVC coil carpet. Those with inconsistent colors, rough texture, no brand words, large deformation, and poor moisture resistance belong to inferior products.

 

A baby activity mat is ideal for use at home or on the go and makes a great baby shower or new baby gift. Our baby play mat for hardwood floors adopt XPE cotton as its main material which also used to produce disposable food boxes, plastic cups, plastic wrap, etc. The material is food-grade with non-toxic and odorless harmless to human body. We offer beautiful designs of die-cut XPE play mats in many different design themes, so it is so easy to put together a playroom floor that is not only soft and safe, but attractive as well.

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COLD-FORMED STEEL

Cold-formed steel refers to a finished steel product of various cross-sectional shapes bent by a steel plate or a strip in a cold state. Cold-formed steel is an economical thin-section thin-walled steel, also known as steel-refrigerated curved or cold-formed profiles. Cold-formed steel is the main material for making lightweight steel structures. It has a variety of extremely thin, well-shaped and complex sections that cannot be produced by hot rolling. Compared with hot-rolled steel, the radius of gyration can be increased by 50-60% and the moment of inertia of the section can be increased by 0.5-3.0 times in the same cross-sectional area, so that the material strength can be used reasonably; That is to say, compared with the traditional steel structures made of I-beam, channel steel, angle steel, and steel plate, it can save about 30 to 50% of steel.

  1. Cold-formed steel is classified according to size specifications and is divided into four types: large, medium, small and wide in terms of product thickness and expansion width.

(1) Large-scale cold-formed steel: the thickness of the product is 6-16mm, and the product has a width of 600-2000mm.

(2) Medium-sized cold-formed steel: the product thickness is 3-6mm, and the product expansion width is 200-600mm.

(3) Small cold-formed steel: the product thickness is 1.5-4mm, and the product expansion width is 30-200mm.

(4) Wide-width cold-formed steel: the thickness of the product is 0.5-4mm, and the product has a width of 700-1600mm.

  1. Cold-formed steels are classified according to their shape and can be divided into open and closed.

(1) Universal open-formed cold-formed steel with equilateral and unequal angles, inner and outer bead angles, equilateral and unequal channel steel, inner or outer bead channel, Z-beam, coil Side Z-shaped steel, special shaped open-section steel, etc.

(2) Closed cold-formed steel is a cold-formed steel with a closed section of welded shape, which is round, square, rectangular and shaped according to its shape.

  1. Cold-formed steel is classified according to the application.

Different industries have different requirements for cold-formed steel. The production of cold-formed steel can meet the different requirements of various industries and produce various special cold-formed steels. The main items can be listed below.

(1) Cold-formed steel for automobile manufacturing; small passenger cars, mostly with irregular-shaped open-shaped steel, such as windows, rain gutters, seat machine pulleys. Most of the buses use closed rectangular steel, and most of the freight cars use open-cold steel; special vehicles such as fire trucks, engineering vehicles mostly use rectangular and shaped cold-formed steel. Bosj offerred cold roll forming machine can meets all kinds of industry requirements.

 

(2) Railway vehicles: Most of the passenger cars and freight vehicles use special shaped cold-formed steel, for example, cold-formed middle beams instead of hot-rolled middle beams. Open for a long time.

The middle beams used in the chassis of the car, the caravan, and the tanker are all hot-rolled steel-welded welded structures. They are welded by two hot-rolled sheets of steel with a height of 310. Since the middle beam is welded with a hot-rolled steel, it exists. The utility model has the advantages of large weight, high welding quality requirement (need to be non-destructive testing), and high comprehensive cost. Therefore, the railway department hopes to develop a high-efficiency cold-formed steel with integral shape, lightweight, high strength and good rigidity instead of hot-rolled steel. The cold-formed middle beam developed by WISCO uses hot-rolled coiled sheets as raw materials, and the integral middle beam is obtained by continuous molding. Another example: Qiqi Group developed cold-formed steel for end wall transverse belts and hat-shaped steel side columns in 1985. In 1993, cold-formed steel for upper side beams of rectangular tubes with sharp corners was developed. The material is cold-formed steel 09CuPTiRE-A The yield strength is 295 MPa. The application of cold-formed steel in China's railway wagons will be more and more.

(3) Elevator: hollow guide rail for the elevator, structural frame for the automatic elevator and cold-formed steel for other special-shaped members

(4) Shelf: Cold-formed steel for small supermarket shelves and large warehouse-style supermarket shelves.

(5) Transmission tower: Focus on the study of replacing the traditional hot-rolled angle steel with cold-formed steel to improve the overall performance of the tower and reduce costs. In the high-voltage long-distance transmission tower, high-strength and anti-corrosion structural steel pipes have been tried in various places. The triangular tower structure made of cold-formed steel for the communication tower is also under development.

(6) Construction machinery: crane lifting arm, support arm, cold-formed steel for tower crane frame.

(7) Electrical equipment manufacturing industry: electrical cabinets, cold-formed steel for cable trays.

(8) Agricultural machinery: cold-formed steel for tractors, plows, hoes, and harvesters, and cold-formed steel for agricultural vehicle beams.

(9) Construction industry: steel structure (beam, column) maintenance structure, roofing, wall, door and window, cold-formed steel for decoration.

  • Furniture: Stools, chairs, cabinets, beds, etc. are special cold-formed steel.

If you want to know the coil forming machine, coil processing machinery and coil rolling machine.As one of the best coil former manufacturers ,we can tell you about coil forming.

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