Is there a manufacturer of exothermic welding graphite molds in Dongguan - Jiecheng graphite products Co., Ltd

  Are there any manufacturers of exothermic welding graphite molds in Dongguan? Of course, there are. Jebsen graphite products Co., Ltd. is a manufacturer specializing in exothermic welding graphite molds. Jebsen graphite products Co., Ltd. has been operating for seven or eight years. It is a powerful graphite product and graphite mold processing factory for lightning protection exothermic welding graphite molds.


Throughout the lightning protection welding industry, it is dominated by hardware, wires, welding powder and resistance reducing agent. Its lightning protection welding graphite molds are all supplied to users in the form of outsourcing. It can be said that none of them independently produce graphite molds, and the quality of welding graphite molds is uneven. What's more, they all enrich the market with coarser graphite materials, Dongguan Jiecheng graphite products Co., Ltd. has also cooperated with several lightning protection companies, almost all of which do not produce graphite molds themselves.

Lightning protection welding graphite mold uses high-purity and high-density graphite mold as raw material. Its oxidation resistance is strengthened, and the welding frequency can reach more than 100 times at least, which greatly saves customers more costs. We know that lightning protection hot-melt welding graphite mold is also called thermite welding connection. The preparation before use can be divided into the following steps:
1. Use heating tools (blowtorch or drying oven) to bake and dry the graphite mold before taking it out every time to drive away the moisture in the graphite mold.
2. Clean the mold after each use, and use soft brush or other soft objects to avoid damaging the mold.
3. Check the tightness of the mold contact surface to prevent copper liquid from leaking out from the gap during operation.
4. The mold clamp is used to open and close the mold. The tightness of the mold clamp has an impact on the welding effect. Please carefully check the mold clamp before welding and make appropriate adjustment.
5. The mold is made of graphite, which is relatively fragile and cannot withstand throwing and strong impact. Therefore, it is not allowed to forcibly put weldments beyond the size of the mold into the mold, or use hard substances and tools to remove residues.
6. The service life of the mold can generally reach more than 50-100 times.
Application of thermit welding: thermit welding is applicable to the connection of conductors in cathodic protection, power, grounding, railway and other industries
The exothermic welding die is made of high-purity graphite, which is used for forming the welding head of grounding exothermic welding. A complete mold is composed of a mold body, a top cover and a hinge. It is made of imported graphite with high density and good abrasion resistance as the basic raw material. It has the advantages of reasonable design, long service life and good usability. The mold is composed of a mold cover, a mold cavity tool, a welding cavity, a guide groove, a mold clamp, etc. it can withstand the melting temperature of copper, steel, iron and other metals. The flow direction, flow rate and final shape of the molten metal are carefully designed. Generally, the life of the mold is 80-200 times.
All exothermic welding molds need to be used with mold clamps. Conventional mold clamps are divided into two types, standard type and eccentric type. Standard type is applicable to most molds. Eccentric type is mainly used for welding grounding rods, cross welding and other types that need to avoid welding materials. Some models of molds need F-type clamps, C-type clamps and other auxiliary fixtures in use. The products of Botou jinhaoyuan Lightning Protection Equipment Co., Ltd. include copper-clad steel series, horizontal continuous casting series, electrolytic ion grounding electrode, hot-dip galvanizing series, grounding module, resistance reduction products, exothermic welding powder and exothermic grounding joint, grounding accessories, grounding terminal box, grounding lead-out device, etc., with thousands of specifications

First of all, let's talk about some inherent characteristics of graphite. Graphite has good conductivity and thermal conductivity: the conductivity of graphite products is 100 times higher than that of general non-metallic minerals. Its thermal conductivity exceeds that of metal materials such as steel, iron and lead. The thermal conductivity decreases with the increase of temperature, and even at extremely high temperatures, graphite becomes an insulator. Graphite products can conduct electricity because each carbon atom in graphite forms only three covalent bonds with other carbon atoms, and each carbon atom still retains one free electron to transfer charges. In exothermic welding construction, many points need to be welded, and the construction amount is not small. The thermal conductivity of graphite can meet this point, which can not only withstand high temperature but also reduce temperature rapidly.
Secondly, graphite has good high temperature resistance. Under normal circumstances, graphite can withstand high temperatures of several thousand degrees. Therefore, we make use of this inherent characteristic of graphite to make it into a graphite mold, which is also a good choice for exothermic welding
In the exothermic welding industry, graphite as the material of exothermic welding mold has the following characteristics:
High temperature resistance: the melting point of graphite is 3850 ± 50 ℃, and the boiling point is 4250 ℃. Even if it is burned by ultra-high temperature arc, the weight loss is very small, and the coefficient of thermal expansion is also very small. The strength of graphite increases with the increase of temperature. At 2000 ℃, the strength of graphite is doubled. During the construction of exothermic welding, the chemical reaction temperature of igniting exothermic flux is very high, so the materials used for exothermic welding molds need to be high-temperature resistant.
Graphite products have excellent thermal shock resistance: when used at normal temperature, graphite products can withstand drastic changes in temperature without damage. When the temperature changes abruptly, the volume of graphite changes little and cracks will not occur.
Lubricity of graphite: the lubricity of graphite depends on the size of graphite scales. The larger the scales, the smaller the friction coefficient, and the better the lubricity& nbsp;