{"id":990,"date":"2017-11-15T17:23:46","date_gmt":"2017-11-15T16:23:46","guid":{"rendered":"https:\/\/polymer-composites.cz\/spray-up\/"},"modified":"2017-11-15T17:23:46","modified_gmt":"2017-11-15T16:23:46","slug":"spray-up","status":"publish","type":"post","link":"https:\/\/polymer-composites.cz\/en\/spray-up\/","title":{"rendered":"Spray-up"},"content":{"rendered":"<p>By this machine technology cut roving and initiated resin are simultaneously applied by special pneumatic gun onto the mould.<\/p>\n<p>The gun is mostly hand-guided, but it is possible to use PC controlled automation.<\/p>\n<p>The moulds are simple, low-cost, practically the same as for hand lay-up, mostly made of composites.<\/p>\n<p>Gelcoat is usually applied (by hand or by spraying) as a first layer. Laminate spray-up is carried out in several layers \u201cwet-to-wet\u201d depending on the part thickness. Each of applied layers is con-<\/p>\n<p>solidated by fin, paddle or bristle rollers of various size and shape removing the entrapped air bubbles at the same time.<\/p>\n<p>Spray-up (SU) ranks also among so called \u201copen\u201d technologies, therefore it is necessary to carry out it in separate air exhausted spraying boxes as the mostly used resins by spray-up are polyesters containing harmful styrene.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>By this machine technology cut roving and initiated resin are simultaneously applied by special pneumatic gun onto the mould. The gun is mostly hand-guided, but it is possible to use PC controlled automation. The moulds are simple, low-cost, practically the same as for hand lay-up, mostly made of composites. Gelcoat is usually applied (by hand&#8230;<\/p>\n","protected":false},"author":1,"featured_media":1019,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_exactmetrics_skip_tracking":false,"_exactmetrics_sitenote_active":false,"_exactmetrics_sitenote_note":"","_exactmetrics_sitenote_category":0,"footnotes":""},"categories":[43],"tags":[],"class_list":["post-990","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-technologies"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Spray-up - Association for Technical Support and Promotion of Polymer Composites<\/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:\/\/polymer-composites.cz\/en\/spray-up\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Spray-up - Association for Technical Support and Promotion of Polymer Composites\" \/>\n<meta property=\"og:description\" content=\"By this machine technology cut roving and initiated resin are simultaneously applied by special pneumatic gun onto the mould. 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