PP plastic tank triangular electrode in the production process is essential materials, Welding Wires quality directly related to the quality of tank, now common in the domestic market to producing PP triangular sub-electrodes can be divided into: Germany Taiwan, China. As Zhe Lu Zhe Chang's plastics factory for many years to produce PP sheet and welding rod history, in fact, there is much to small a plastic rod, Zhe Lu Chang (ZARO) has been felt to say,
Let's do a simple comparison it:
Germany PP welding quality, product shape standards, but the price is extraordinarily high, at about 120 yuan / kg or more;
Taiwan brand of PP welding rod good quality, but the price also very high, about 55 yuan / kg or more;
The quality of domestic brands of PP mixed electrode, PP raw materials useful for general Copper Welding Electrode, the more inferior quality; also useful for the production of specific raw materials PP welding rod, extrusion process to set reasonable, no way inferior quality imported brands, but the price is usually only 20 - -30 yuan / kg.
We then look at the raw material for the production of PP welding rod it. Even the soaring price of staple goods in 2008, both special and ordinary PP PP particles were broken particles price 20,000 yuan / ton mark, a little plastic extrusion common sense should be a general understanding of the cost out. So less than 20 yuan / kg but the cost of its products can be high price to 55 yuan / kg or even 120 yuan / kg, we can not but lament the high profits the big appeal of its brand, but also for some businesses close. " superstition "as the high costs incurred by purchasing deeply troubling and sorry!
Reflecting the small things a lot of welding, plastic products manufacturing companies still have a long way to go, and constantly strive to explore, and strive to provide customers with more quality and higher quality products.
Casting is the basis of mechanical manufacturing process technology, for various reasons in the production process there will be a variety of defects, especially in the automotive industry in the diesel engine, gasoline engine cylinder block, such a complex thin-walled parts rejection rate is higher. In addition, a variety of machinery and equipment in the cast iron easily damaged during use so far, domestic and international which is still not completely solved the problem of the theory and methods. 1.2 International News
Internationally, as the cast iron cold welding (welding refers to the former do not have to warm up) and still spend 1940's extension of the United States invented the nickel-iron electrode mainly pure, under certain conditions, can be nickel-based powder spray, near U.S. production of 308 wires (with a resemblance to the present invention) compared with the present invention fusion zone HB ≤ 300 (the invention of ≤ 240), and, when not in use continuous welding (due to slag and prone to crack) 1.3 Domestic News
The 1980s, the State Planning Commission to Beijing 211 Factory Chen Zhongsheng (Professor of Engineering) of "low carbon steel electrode" in the "July five" "seven. Eight" during the promotion, proved that the technology can not effectively solve the cast iron welding the fundamental problem; to the nineties, Chongqing University, studied the spray, recommended by the Sichuan Provincial Planning Commission focus, diesel engine manufacturers in certain applications, but in the application process the following problems:
â‘ welding temperature is difficult to control the technology before using autogenous welding heat to be welded at the flame, the heating temperature is by artificial visual, low temperature solder is not strong, the temperature is too high welding will also receive too hard;
â‘¡ welding preparation work is more cumbersome, technically demanding to be welded at the clean up before welding;
â‘¢ welding process have special requirements for the operation, improper operation could easily lead to the loss of liquid solder;
â‘£ The welding surface area and thickness are higher, and is only suitable for welding large area and shallow face;
â‘¤ welding staff working conditions, when temperatures are high in summer, warm in winter operation a long time the workpiece
In summary, although the availability of certain external spray conditions, to achieve mechanical processing and thermal cracking, but the technology exists because many of the above shortcomings and drawbacks, and in practice works in cast iron is still hot crack weldment (The determination of thermal cracks more than 80% probability), so that in large scale application is limited 1.4 patents and technology from theory to solve several problems:
(1) white issue, no heat treatment after welding?
The current domestic and international welding of cast iron were white solve the problem, now the United States invented the wire 308 (currently the most advanced) In the ideal case the thickness of the fusion zone of up to 0.1MM, chilling tendency evident, while the present invention use of special cold Welding Wire and semi-automatic CO2 protection technology current density, a large cooling rate after welding, base metal and welding fusion zone microstructure of hardened layer from the white layer analysis is intermittent, generally <0.07MM, for the first cut processing tools have little effect, for no heat treatment after welding
(2) are not resolved before welding heat, not the problem of cracks
Welding cast iron is for local rapid heating, the temperature differential is inevitable, when the thermal stress is greater than the tensile strength of the welded pieces of cast iron is bound to hot cracking. Wire in the design of the present invention to use the chemical composition of the lowest the yield limit "200MPA, and up to 400-500MPA, so that once the process of welding stress and deformation over 200MPA make the weld when stress drop, to most effectively prevent the appearance of thermal cracks
(3) to solve the fusion problem
Some cast iron, due to "graphite" thick, high temperature or oil in the environment, in the welding process to a certain extent affect the fusion of a serious roll when not welding? Welding technology in the present invention facilitate the process of combustion of graphite, combustion of CO can promote the fusion of the weld pool boiling significantly change the
Before and after the Aluminium Welding Wire is not in the heat treatment may destroy the original machining accuracy, the fusion zone Hbmax ∠ 240, welded joints and base metal such as intensity, color, consistent with the parent material for all kinds of complicated welding thin-walled parts , can be used in ductile iron, gray iron castings and other cast iron products, welding
Since the invention of cast iron technology solve the fundamental problem of welding, which produces a corresponding increase in labor rates and substantial savings in energy
94 years since the technology in Jiangsu, "JAC Power" Large enterprises have been successfully applied, diesel engine repair business for the past few years has reached 10 million units, economic losses of several thousand million, and achieved good economic benefits, the enterprise has been praise and recognition
CO2 produced by the patented cast iron wire is now dedicated to market