{"id":75263,"date":"2017-02-25T05:19:19","date_gmt":"2017-02-25T05:19:19","guid":{"rendered":"http:\/\/ptfe-machinery.com\/?p=75263"},"modified":"2017-02-25T05:19:19","modified_gmt":"2017-02-25T05:19:19","slug":"rotational-mouldingpowder-injection-moulding-thixomoulding","status":"publish","type":"post","link":"https:\/\/ptfe-machinery.com\/ru\/rotational-mouldingpowder-injection-moulding-thixomoulding\/","title":{"rendered":"Rotational moulding,Powder injection moulding and thixomoulding"},"content":{"rendered":"

Rotational moulding<\/strong><\/p>\n

In rotationalmoulding,a chargeof plastic powderis placed in one half of a metal mould.The mouldhalves are thenclamped together and heated while the mould rotates biaxially. The powder particles melt and coalesce to form a homogeneous layer on the surface of the mould. The mould is then cooled and the polymer layer densi\u008e es and solidi\u008efies.Rotational moulding competes with blow moulding,thermoformingand injection moulding for the production of hollow parts. The main advantages of this process are the simplicity of the moulds and the low capital investment requirement. Cycle times are large,~15 \u2013 30 min. Rotationalmoulding is mainly used for large tanks (up to 85 m 3 reported), toys and hollow parts that require frequent design modi\u008e cations.<\/p>\n

The process of coalescence and subsequent densi\u008e cation is usually referred to as sintering by rotational moulding practitioners.In powder metallurgy, however, the term sintering usually refers to compaction of powders below their melting point.
\nPowder injection moulding and thixomoulding<\/strong><\/p>\n

Powder injection moulding (PIM) and thixomoulding are two processes that use traditional polymer processing principles for the production of metal parts.<\/p>\n

In PIM, fine powders are blended into a \u2018binder\u2019 to hold the particles together, and are mixed with additives to form the \u2018feedstock\u2019. The feedstock is then used in suitably modi-fied, but otherwise conventional, polymer injection moulding machinesfor injection into moulds. After debinding and heating, the metal welds together by a sintering process to form strong metal or ceramic parts. Various types of ferrous alloys and oxide ceramics are suited to this process.<\/p>\n

In thixomoulding, metal alloy granules are fed from a hopper into the gap between a barrel and a rotating screw,and are heated by shearing to form a semisolid slurry. The material is then injected into a heated mould. By cooling, the material is solidi\u008e ed, and then it is removed from the mould and trimmed. Magnesium, aluminium and zinc are suited to thixomoulding. Currently, magnesium is mostly used in this process.<\/p>","protected":false},"excerpt":{"rendered":"

Rotational moulding In rotationalmoulding,a chargeof plastic powderis placed in one half of a metal mould.The mouldhalves are thenclamped together and heated while the mould rotates …<\/p>","protected":false},"author":1,"featured_media":75264,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[74],"tags":[80,79],"class_list":["post-75263","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-moulding-machines","tag-injection-moulding","tag-rotational-moulding"],"yoast_head":"\nRotational moulding,Powder injection moulding and thixomoulding - PTFE Machinery<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/ptfe-machinery.com\/ru\/rotational-mouldingpowder-injection-moulding-thixomoulding\/\" \/>\n<meta property=\"og:locale\" content=\"ru_RU\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Rotational moulding,Powder injection moulding and thixomoulding\" \/>\n<meta property=\"og:description\" content=\"Rotational moulding In rotationalmoulding,a chargeof plastic powderis placed in one half of a metal mould.The mouldhalves are thenclamped together and heated while the mould rotates …\" \/>\n<meta property=\"og:url\" content=\"https:\/\/ptfe-machinery.com\/ru\/rotational-mouldingpowder-injection-moulding-thixomoulding\/\" \/>\n<meta property=\"og:site_name\" content=\"PTFE Machinery\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/sukopolymer\/\" \/>\n<meta property=\"article:published_time\" content=\"2017-02-25T05:19:19+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/ptfe-machinery.com\/wp-content\/uploads\/2017\/02\/injection-moulding.png\" \/>\n\t<meta property=\"og:image:width\" content=\"509\" \/>\n\t<meta property=\"og:image:height\" content=\"341\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"ptfe-machinery\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u041d\u0430\u043f\u0438\u0441\u0430\u043d\u043e \u0430\u0432\u0442\u043e\u0440\u043e\u043c\" \/>\n\t<meta name=\"twitter:data1\" content=\"ptfe-machinery\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u041f\u0440\u0438\u043c\u0435\u0440\u043d\u043e\u0435 \u0432\u0440\u0435\u043c\u044f \u0434\u043b\u044f \u0447\u0442\u0435\u043d\u0438\u044f\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 \u043c\u0438\u043d\u0443\u0442\u044b\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/ptfe-machinery.com\\\/rotational-mouldingpowder-injection-moulding-thixomoulding\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/ptfe-machinery.com\\\/rotational-mouldingpowder-injection-moulding-thixomoulding\\\/\"},\"author\":{\"name\":\"ptfe-machinery\",\"@id\":\"https:\\\/\\\/ptfe-machinery.com\\\/#\\\/schema\\\/person\\\/5aa170b8f40d7008a443d610525477e7\"},\"headline\":\"Rotational moulding,Powder injection moulding and thixomoulding\",\"datePublished\":\"2017-02-25T05:19:19+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/ptfe-machinery.com\\\/rotational-mouldingpowder-injection-moulding-thixomoulding\\\/\"},\"wordCount\":331,\"commentCount\":3,\"publisher\":{\"@id\":\"https:\\\/\\\/ptfe-machinery.com\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/ptfe-machinery.com\\\/rotational-mouldingpowder-injection-moulding-thixomoulding\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/ptfe-machinery.com\\\/wp-content\\\/uploads\\\/2017\\\/02\\\/injection-moulding.png\",\"keywords\":[\"injection moulding\",\"Rotational moulding\"],\"articleSection\":[\"Moulding Machines\"],\"inLanguage\":\"ru-RU\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/ptfe-machinery.com\\\/rotational-mouldingpowder-injection-moulding-thixomoulding\\\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/ptfe-machinery.com\\\/rotational-mouldingpowder-injection-moulding-thixomoulding\\\/\",\"url\":\"https:\\\/\\\/ptfe-machinery.com\\\/rotational-mouldingpowder-injection-moulding-thixomoulding\\\/\",\"name\":\"Rotational moulding,Powder injection moulding and thixomoulding - 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