[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"detail-sidebar-cat-0-en-105":3,"doc-seo-664861-105":59,"doc-detail-664861-en":129},{"code":4,"msg":5,"data":6},0,"success",[7,13,18,23,28,33,38,43,48,51,55],{"id":8,"doc_module":4,"doc_module_name":9,"category_name":10,"show_sort_weight":11,"slug":12},1,"Document","Story & Novel",90,"story-novel",{"id":14,"doc_module":4,"doc_module_name":9,"category_name":15,"show_sort_weight":16,"slug":17},2,"Literature",80,"literature",{"id":19,"doc_module":4,"doc_module_name":9,"category_name":20,"show_sort_weight":21,"slug":22},4,"Exam",70,"exam",{"id":24,"doc_module":4,"doc_module_name":9,"category_name":25,"show_sort_weight":26,"slug":27},5,"Comic",60,"comic",{"id":29,"doc_module":4,"doc_module_name":9,"category_name":30,"show_sort_weight":31,"slug":32},6,"Technology",50,"technology",{"id":34,"doc_module":4,"doc_module_name":9,"category_name":35,"show_sort_weight":36,"slug":37},7,"Healthcare",40,"healthcare",{"id":39,"doc_module":4,"doc_module_name":9,"category_name":40,"show_sort_weight":41,"slug":42},8,"Research & Report",30,"research-report",{"id":44,"doc_module":4,"doc_module_name":9,"category_name":45,"show_sort_weight":46,"slug":47},9,"Religion & Spirituality",20,"religion-spirituality",{"id":46,"doc_module":4,"doc_module_name":9,"category_name":49,"show_sort_weight":46,"slug":50},"World Cup","world-cup",{"id":52,"doc_module":4,"doc_module_name":9,"category_name":53,"show_sort_weight":52,"slug":54},10,"Lifestyle","lifestyle",{"id":56,"doc_module":4,"doc_module_name":9,"category_name":57,"show_sort_weight":24,"slug":58},19,"General","general",{"code":4,"msg":60,"data":61},"ok",{"site_id":62,"language":63,"slug":64,"title":65,"keywords":66,"description":67,"schema_data":68,"social_meta":122,"head_meta":124,"extra_data":126,"updated_unix":128},105,"en","the-production-of-cast-iron-manufacturing-process-overview","The Production of Cast Iron - Manufacturing Process Overview","","Hargreaves Foundry explains a four-stage workflow for producing cast-iron components using sand casting enhanced with modern materials and technology. The process starts with design and engineering/manufacturing drawings, including pattern creation when original plans are unavailable. It then covers skilled pattern making and mould making with runner systems, sand cores for hollow sections, mould packing in two halves, and safe, controlled melting and pouring at high temperature. After cooling, break-out, fettling, cleaning, and recycling produce finished castings ready for long-term use.",{"@graph":69,"@context":121},[70,84,104],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":40,"@type":76,"position":81},"https://docshare.wps.com/document/research-report/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/the-production-of-cast-iron-manufacturing-process-overview/664861/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":98,"encodingFormat":97,"isAccessibleForFree":99,"interactionStatistic":100},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/the-production-of-cast-iron-manufacturing-process-overview/664861.png","ImageObject",300,407,{"name":92,"@type":93},"Guten Appetit_Joghurt","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-10-29",true,{"@type":101,"interactionType":102,"userInteractionCount":4},"InteractionCounter",{"@type":103},"ViewAction",{"@type":105,"mainEntity":106},"FAQPage",[107,113,117],{"name":108,"@type":109,"acceptedAnswer":110},"What are the four main stages in cast-iron production described here?","Question",{"text":111,"@type":112},"The production process has four stages: Design, Pattern Making, Mould Making, and Casting.","Answer",{"name":114,"@type":109,"acceptedAnswer":115},"Why must patterns be extremely precise in sand casting?",{"text":116,"@type":112},"Patterns must match the finished item’s shape and dimensions because any irregularity or mistake is reproduced in the casting. They also must account for metal shrinkage and include runner/riser channels for metal flow and gas escape.",{"name":118,"@type":109,"acceptedAnswer":119},"How are hollow castings formed in the moulding process?",{"text":120,"@type":112},"Hollow sections are created by forming an internal sand core with precise thickness. The molten iron flows around the core so that after break-out the core sand remains inside during casting formation and is then removed to leave a cavity.","https://schema.org",{"og:url":83,"og:type":123,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":125,"canonical":83},"index,follow",{"doc_id":127,"site_id":62},664861,1793276720,{"code":4,"msg":5,"data":130},{"doc_id":127,"user_id":131,"nickname":92,"user_avatar":132,"doc_module":4,"category_id":39,"category_name":40,"doc_title":65,"doc_description":67,"doc_content":133,"file_id":134,"file_url":135,"file_type":136,"file_size":137,"view_count":4,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":81,"language":138,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":139,"faqs":140,"seo_title":141,"seo_description":67,"update_tm":128,"read_time":39},1374408768420,"https://ap-avatar.wpscdn.com/davatar_6f874abed73319feea01a86fa6f0fab8","The Production of Cast Iron:  \nHargreaves Foundry employs traditional sand casting techniques enhanced by modern materials and technology. There are four stages in production; Design, Pattern Making, Mould Making and Casting.  \nDesign: converting ideas into solid metal requires a planned approach that takes into account the function of the object as well as its appearance. For machine tools the stresses and conditions a machine operates under need to be considered. For architectural purposes it may be structural ability, supportive strength or decorative embellishment.  \nEngineering companies provide detailed, often complex, manufacturing drawings. Architects supply drawings/elevations which in most cases need to be reproduced as manufacturing drawings showing precise dimensions, metal thickness etc so that the next stage, Pattern Making, can progress.  \nOccasionally no plans or drawings exist, especially for conservation and restoration projects where original samples are, however, available. In these cases Hargreaves can use detailed measurements and photographs taken from the originals to make new drawings and patterns for precise reproduction.  \nPattern Making: once a design has been approved and a manufacturing drawing produced a pattern can be made, normally in wood but sometimes using fibreglass or plastics.  \nPatterns have to be exactly the shape of the finished item and precise in their dimensions as they are used to make the sand moulds. Patterns can be re-used to make more moulds and, if looked after, can last for many years making thousands of moulds. Any irregularity or mistake will be reproduced in the casting. Not only this but patterns must allow for shrinkage of the metal when it cools and also create channels or runners to allow the molten metal to flow into the mould andrisers to allow for the escape of gases. It is complex and extremely skilled work and our pattern makers are all apprentice trained and highly experienced.  \nMould Making: the next stage is to make a mould in sand into which the molten iron can be poured. The pattern is packed into sand that has been mixed with clay or resin and when removed leaves the shape for the casting. Moulds are usually made in two parts and held in 'boxes' for the actual pouring. When the two halves of the mould are placed face to face, one on top of the other, a cavity is created into which the molten iron can be poured. In the case of very large castings these are created in moulds dug out of sand in the foundry floor.  \nA critical factor in mould making is the runner system, a network of channels that allow the molten metal to run into the mould. There is great skill and expertise in this part of the process, if the molten iron does not run quickly enough it will solidify before it reaches the casting shape, if it runs too quickly or violently it could damage the mould and spoil the casting.  \nMany castings i.e. bollards and columns are not solid but have hollow centres or cavities. To create a cavity the internal shape of the casting is formed by making a sand core, which is then placed in the mould cavity. This is another part of the process requiring great skill to ensure precise metal thickness and form. The molten iron runs round the core so that when the casting is broken out of its mould the internal sand core remains. It is then removed to leave a cavity.  \nWhen breaking out the casting the sand mould is destroyed, but of course new moulds can be made from the pattern using the same sand after it has been re-cycled.  \nCasting: This is the final part of the process and the one most people associate with foundries. Melting and pouring iron at 1,350 degrees centigrade is a spectacular and potentially violent process. Safety is the highest priority in any foundry.  \nFirst the furnace is carefully loaded to ensure the correct chemical characteristics for the prescribed grade of iron are achieved. The iron is then melted in the furnace and poured off to go into t","cbCaibPdUiYTQv04","https://ap.wps.com/l/cbCaibPdUiYTQv04","pdf",501669,"English","# Overview of the Foundry Process\n## Design and Pattern Making\n## Mould Making\n## Casting and Finishing\n## Example Steps: Casting a Bollard","[{\"question\":\"What are the four main stages in cast-iron production described here?\",\"answer\":\"The production process has four stages: Design, Pattern Making, Mould Making, and Casting.\"},{\"question\":\"Why must patterns be extremely precise in sand casting?\",\"answer\":\"Patterns must match the finished item’s shape and dimensions because any irregularity or mistake is reproduced in the casting. They also must account for metal shrinkage and include runner/riser channels for metal flow and gas escape.\"},{\"question\":\"How are hollow castings formed in the moulding process?\",\"answer\":\"Hollow sections are created by forming an internal sand core with precise thickness. The molten iron flows around the core so that after break-out the core sand remains inside during casting formation and is then removed to leave a cavity.\"}]","The Production of Cast Iron - Manufacturing Process Overview | PDF"]