[{"data":1,"prerenderedAt":243},["ShallowReactive",2],{"blog-en-\u002Fblog\u002Fexothermic-welding-graphite-molds":3,"blog-related-\u002Fblog\u002Fexothermic-welding-graphite-molds":224},{"id":4,"title":5,"alternateArticle":6,"authors":7,"body":13,"category":210,"contentOrigin":211,"date":212,"description":213,"extension":214,"image":215,"lastUpdated":216,"meta":217,"navigation":218,"ogImage":219,"originalArticle":220,"path":6,"seo":221,"stem":222,"tags":219,"__hash__":223},"blog_en\u002Fblog\u002Fexothermic-welding-graphite-molds.md","Importance of graphite as a mold for exothermic welding","\u002Fblog\u002Fexothermic-welding-graphite-molds",[8],{"name":9,"position":10,"avatarUrl":11,"link":12},"Arturo Romero","CIO","https:\u002F\u002Fgithub.com\u002Farturork.png","https:\u002F\u002Flinkedin.com\u002Fin\u002Farturork",{"type":14,"value":15,"toc":197},"minimark",[16,20,23,26,31,34,37,42,76,79,111,115,118,121,124,127,131,134,150,154,157,161,164,182,186],[17,18,19],"p",{},"Because the process generates extreme heat, a mold is required to contain the\nflux and the elements to be joined. The mold for exothermic welding offers\nexcellent properties such as thermal shock resistance and self-lubricating\nproperties, making it excellent for this task.",[17,21,22],{},"Exothermic welding is used to join copper to copper; copper to steel; steel to\nsteel; aluminum to steel and aluminum to aluminum. For example for joining\ncopper cables.",[17,24,25],{},"The exothermic welding mold has many uses, which we will look at below to\nunderstand what it is, what it is for and why graphite is used in this process.",[27,28,30],"h2",{"id":29},"what-is-exothermic-welding","What is exothermic welding?",[17,32,33],{},"Exothermic is a chemical term used when there is a chemical reaction that\ngenerates heat while the reaction is taking place.",[17,35,36],{},"Thus, welding is a process that creates the molecular bonding of two or more\nmetallic conductors that through a chemical reaction melt together. Also, it\nimproves mechanical, electrical and corrosion properties over any mechanical\njoint resulting in strong joints with a host of advantages.",[38,39,41],"h3",{"id":40},"the-advantages-are","The advantages are:",[43,44,45,49,52,55,58,61,64,67,70,73],"ol",{},[46,47,48],"li",{},"The material has a long durability, equal to or greater, than other materials\nused in joining.",[46,50,51],{},"The connections are not damaged when there are current peaks, causing the\nconductor to melt and not the connection.",[46,53,54],{},"It does not deteriorate with time, since the connections do not loosen or\nsuffer corrosion.",[46,56,57],{},"The exothermic connection becomes part of the conductor.",[46,59,60],{},"It has the ability to conduct current equally or more than the conductors.",[46,62,63],{},"Withstands electrical damage repeatedly.",[46,65,66],{},"The reaction is terminated in a few seconds, and is important in the\nconnection of insulated conductors or thin-walled tubes.",[46,68,69],{},"It has a low cost.",[46,71,72],{},"It only requires soldering skill.",[46,74,75],{},"The quality of the work is visually checked.",[17,77,78],{},"Procedure 1.",[43,80,81,84,87,90,93,96,99,102,105,108],{},[46,82,83],{},"Cleaning Cleans and removes any impurities from conductors and mold, so that\nno unacceptable welds or welds with dangerous reactions are made.",[46,85,86],{},"Heats the mold. Heat the exothermic welding mold to 120ºC with a torch. It is\nimportant that it be made of graphite, to absorb the moisture from the\ntemperature and not make porous welds. Also, so that the work is done only\nonce.",[46,88,89],{},"Place the conductors in the mold The conductors must be well fastened,\nclosing hermetically the mold with the clamps. And you must check that the\nconductors have the standard diameter to be able to work with them.",[46,91,92],{},"Place the flux tablets in the mold hopper The number of tablets will depend\non the type of connection to be made. It is important to mention that it is\nnot necessary to use metallic discs to make the soldering.",[46,94,95],{},"After closing the lid, the electronic initiator must be placed and any\nmovement must be blocked with the safety lever.",[46,97,98],{},"Open the electronic ignition equipment. Place the other end of the cable in\nthe side connector of the exothermic welding mold. Connect the clamp to the\ncontact of the electronic ignitor. It is very important to ensure electrical\ncontact between the clamp and the filament. Move away from the mold and turn\non the equipment.",[46,100,101],{},"Move away from the mold for exothermic welding At the maximum distance\noffered by the connection cable which is 2 m.",[46,103,104],{},"Start weldingPress both ignition buttons at the same time until the reaction\nstarts.",[46,106,107],{},"Wait 15 seconds Before opening the mold to make sure that the solidification\nof the melt is done, wait 15 seconds.",[46,109,110],{},"Once the mold is clean, a new weld can be made without reheating the mold,\nas long as the new connection is made within 10 to 15 minutes.",[27,112,114],{"id":113},"why-a-mold-is-needed-for-exothermic-graphite-welding","Why a mold is needed for exothermic graphite welding?",[17,116,117],{},"Precision in this process is vital, which is why exothermic welding molds are\nused. Since they are made of graphite, to the size of the conductors and of\ncourse arranged by the customer's needs.",[17,119,120],{},"Due to the high temperatures, a material that can withstand them is required.\nGraphite offers excellent thermal shock resistance, is easy to machine, does not\nburn and can be used repeatedly.",[17,122,123],{},"Each mold has specifications of type and quantity of flux to be used, which must\nbe checked by the operator. Graphite exothermic welding molds usually have a\nnameplate: mentioning the technical specifications of the mold as well as the\nflux volume.",[17,125,126],{},"The molds vary in their machining for the union of two conductors determined as\ncable-cable; plate-plate; cable-spike, among others. They have exact dimensions\nsuch as 50mm2; 70mm2, etc., and are joined in specific ways such as T-shaped or\ncross-shaped.",[27,128,130],{"id":129},"conclusions","Conclusions",[17,132,133],{},"To conclude, the exothermic welding mold is an important tool in electrical work\nand for joining parts by fusion.",[17,135,136,137,142,143,149],{},"In ",[138,139,141],"a",{"href":140},"\u002F","ESGRAF"," we have a wide inventory of graphite grades\nfor the production of exothermic welding molds such as\n",[138,144,148],{"href":145,"rel":146},"\u002F\u002Fbloques-grafito-sintetico\u002F",[147],"nofollow","iso molded or extruded grades",".\nDo not hesitate to contact us to offer you the best solution.",[27,151,153],{"id":152},"limitations-to-consider","Limitations to consider",[17,155,156],{},"Performance depends on graphite grade, grain orientation, temperature, load, pressure, speed, and operating environment. Material selection should be confirmed for your actual process conditions.",[27,158,160],{"id":159},"information-needed-for-a-quote","Information needed for a quote",[17,162,163],{},"To guide selection or prepare a quote, ESGRAF typically needs:",[165,166,167,170,173,176,179],"ul",{},[46,168,169],{},"Application and operating conditions (temperature, atmosphere, load).",[46,171,172],{},"Dimensions, technical drawing, or CAD file when applicable.",[46,174,175],{},"Required quantity.",[46,177,178],{},"Requested grade or material currently in use.",[46,180,181],{},"Observed issue with the previous part or lubricant, if any.",[27,183,185],{"id":184},"request-a-quote","Request a quote",[17,187,188,189,191,192,196],{},"Share these details with our team at ",[138,190,141],{"href":140}," or ",[138,193,195],{"href":194},"\u002Fcontact","request information",". A specialist will review your application before recommending a grade or geometry.",{"title":198,"searchDepth":199,"depth":199,"links":200},"",2,[201,205,206,207,208,209],{"id":29,"depth":199,"text":30,"children":202},[203],{"id":40,"depth":204,"text":41},3,{"id":113,"depth":199,"text":114},{"id":129,"depth":199,"text":130},{"id":152,"depth":199,"text":153},{"id":159,"depth":199,"text":160},{"id":184,"depth":199,"text":185},"Use cases","translation","2020-04-01","Exothermic welding uses the high temperatures generated as a result of the reaction of materials to join different materials.","md","\u002Fassets\u002Fblog\u002Fexothermic-welding-graphite-molds.webp","2026-07-22",{},true,null,"\u002Fblog\u002Fmolde-para-soldadura-exotermica",{"title":5,"description":213},"blog\u002Fexothermic-welding-graphite-molds","oqTgNehrXkzdYssQ1NXm2-FqJVau-GnzfBHAQvlLtuw",[225,231,237],{"path":226,"title":227,"description":228,"image":229,"date":230,"category":210},"\u002Fblog\u002Fspheroidal-graphite-cast-iron","Spheroidal graphite cast iron - in which industries is it needed?","Cast irons are a group of ferrous alloys that have a large number of properties and have above 2% carbon. In these cases the carbon does not dissolve completely in the iron and solidifies in the form of graphite or iron carbide. One of the types is spheroidal graphite cast iron or nodular cast iron.","\u002Fassets\u002Fblog\u002Fspheroidal-graphite-cast-iron.webp","2020-12-22",{"path":232,"title":233,"description":234,"image":235,"date":236,"category":210},"\u002Fblog\u002Fbenefits-graphite-dielectric-properties","Anisotropic conductivity of graphite: conductor and insulator by direction","Graphite is not a uniform dielectric: it conducts well in the basal plane and behaves like an insulator perpendicular to the layers. That anisotropy explains its role in EDM, brushes, and thermal components.","\u002Fassets\u002Fblog\u002Fbenefits-graphite-dielectric-properties.webp","2020-12-15",{"path":238,"title":239,"description":240,"image":241,"date":242,"category":210},"\u002Fblog\u002Fcrystalline-graphite-flake","Crystalline flake graphite: utilization and impact in the industry","Graphite is a mineral that can be obtained naturally but also artificially. artificially. It is one of the most stable allotropic forms of carbon and has a wide range of industrial uses. It is one of the most stable allotropic forms of carbon and has a wide range of applications due to its characteristics.","\u002Fassets\u002Fblog\u002Fcrystalline-graphite-flake.webp","2020-12-10",1785448975900]