{"id":29732,"date":"2026-09-19T10:25:40","date_gmt":"2026-09-19T02:25:40","guid":{"rendered":"https:\/\/lintyco.nl\/verpakkingsmachine-voorgevormde-doypack\/"},"modified":"2026-09-19T10:25:40","modified_gmt":"2026-09-19T02:25:40","slug":"verpakkingsmachine-voorgevormde-doypack","status":"publish","type":"post","link":"https:\/\/lintyco.nl\/en\/verpakkingsmachine-voorgevormde-doypack\/","title":{"rendered":"Packaging machine for preformed Doypacks: 30 to 60 bags\/min"},"content":{"rendered":"

The Doypack<\/a> is the most commonly used preformed stand-up pouch: flat bottom, wide sealing edge, and a rounded slope that showcases the product beautifully. This page is about the machine that fills and seals these pouches\u2014the packaging machine for preformed bags<\/a> \u2014 and about the choices you make in the process.<\/p>\n

How It Works in Four Steps<\/h2>\n
    \n
  1. Carry handle and transport.<\/strong> A gripping system retrieves the bags one by one from a storage rack and places them on a clamp-plate conveyor. The storage rack typically holds 200 to 500 bags.<\/li>\n
  2. Open and shape.<\/strong> Suction cups pull the bag open while a stream of air keeps the bag walls apart. Sensors check to make sure the bag is actually there and open.<\/li>\n
  3. Fill.<\/strong> The dosing device is attached to your product; see the table below.<\/li>\n
  4. Seal.<\/strong> Sealing is done in two steps: first below the filling point, then the main seam\u2014possibly with a degassing valve, zipper, or spout in the seal seam.<\/li>\n<\/ol>\n

    Dosage Guidelines by Product<\/h2>\n
    \n\n\n\n\n\n\n\n
    Dosing Type<\/th>\nSuitable for<\/th>\nAccuracy<\/th>\n<\/tr>\n<\/thead>\n
    Multihead Weigher<\/td>\nbeans, granules, loose products<\/td>\n\u00b10.5 g<\/td>\n<\/tr>\n
    Screw Feeder<\/td>\npowder, instant coffee<\/td>\n\u00b11%<\/td>\n<\/tr>\n
    Piston Filler<\/td>\nliquids, pastes, viscous liquids<\/td>\n\u00b11%<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/figure>\n

    The choice of dosing equipment depends on your product, not the other way around: first determine the product and the dosing weight, then specify the machine.<\/p>\n

    Sizes, Weights, and Speed<\/h2>\n

    Sizes range from 100 x 150 mm to 400 x 500 mm, with bag capacities from 50 g to 5 kg. The speed ranges from 30 to 60 bags per minute, depending on the dose, product behavior, and whether a degassing pause is required. Within a single bag family, changing formats is simply a matter of adjusting the grip width and selecting the program\u2014it doesn\u2019t take hours of work.<\/p>\n

    When the VFFS approach makes more sense<\/h2>\n

    At rates above 80 bags per minute, or when the cost of the bags is negligible compared to the cost of the material, a vertical form, fill, and seal machine<\/a> The better method: unroll from the roll, which results in lower foil consumption per piece. The full analysis can be found in preformed bags or VFFS<\/a>.<\/p>\n

    Frequently Asked Questions<\/h2>\n

    Q: Can a single machine handle all my doypack sizes?<\/strong><\/p>\n

    Usually within a range of approximately 100 to 400 mm in bag width. Extreme exceptions\u2014such as mini-sachets alongside 5-kg bags\u2014require a second grip or a second line. Submit your size list to the supplier before finalizing the specifications.<\/p>\n

    Q: What about a degassing valve for coffee?<\/strong><\/p>\n

    The valve is inserted into the seal during the sealing process, provided the machine is equipped for this purpose. For coffee, this is standard: it allows CO2 to escape and keeps oxygen out. See the guide on Packaging coffee on a VFFS machine<\/a> for a comprehensive comparison of routes.<\/p>\n

    Q: What is a realistic goal for the first year?<\/strong><\/p>\n

    Expect a ramp-up period during which seal parameters and dosage adjustments will be fine-tuned. After that period, the line should reach its rated speed; plan for maintenance and spare parts starting on day one, according to the preventive maintenance schedule<\/a>.<\/p>\n

    Related pages<\/h2>\n

    packaging machine for preformed bags<\/a> | Doypack<\/a> | block-bottom bag<\/a> | preformed bags or VFFS<\/a><\/p>\n

    \n

    Request a technical proposal<\/a> Please specify the product, bag size, and desired output.<\/p>","protected":false},"excerpt":{"rendered":"

    A line for preformed Doypack bags grips, opens, fills, and seals individual bags: 30 to 60 bags\/min, sizes ranging from 100 x 150 to 400 x 500 mm, and three filling methods. This page describes the operation step by step and explains when the VFFS method is a better choice.<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_seopress_titles_title":"","_seopress_titles_desc":"Verpakkingsmachine voor voorgevormde Doypack: werking van zakgreep tot sealeinde, 30 tot 60 zakken\/min en formaten van 100 x 150 tot 400 x 500 mm.","_seopress_robots_index":"","_seopress_robots_follow":"","_seopress_robots_imageindex":"","_seopress_robots_snippet":"","_seopress_robots_primary_cat":"","_seopress_robots_breadcrumbs":"","_seopress_robots_freeze_modified_date":"","_seopress_robots_custom_modified_date":"","_seopress_robots_canonical":"","_seopress_social_fb_title":"","_seopress_social_fb_desc":"","_seopress_social_fb_img":"","_seopress_social_fb_img_attachment_id":0,"_seopress_social_fb_img_width":0,"_seopress_social_fb_img_height":0,"_seopress_social_twitter_title":"","_seopress_social_twitter_desc":"","_seopress_social_twitter_img":"","_seopress_social_twitter_img_attachment_id":0,"_seopress_social_twitter_img_width":0,"_seopress_social_twitter_img_height":0,"_seopress_redirections_value":"","_seopress_redirections_enabled":"","_seopress_redirections_enabled_regex":"","_seopress_redirections_logged_status":"","_seopress_redirections_param":"","_seopress_redirections_type":0,"_seopress_analysis_target_kw":"","neve_meta_sidebar":"","neve_meta_container":"","neve_meta_enable_content_width":"","neve_meta_content_width":0,"neve_meta_title_alignment":"","neve_meta_author_avatar":"","neve_post_elements_order":"","neve_meta_disable_header":"","neve_meta_disable_footer":"","neve_meta_disable_title":"","neve_meta_reading_time":"","footnotes":""},"categories":[1],"tags":[66,212,48],"class_list":["post-29732","post","type-post","status-publish","format-standard","hentry","category-blog","tag-doypack","tag-voorgevormde-zakken","tag-zakvulmachine"],"_links":{"self":[{"href":"https:\/\/lintyco.nl\/en\/wp-json\/wp\/v2\/posts\/29732","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/lintyco.nl\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/lintyco.nl\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/lintyco.nl\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/lintyco.nl\/en\/wp-json\/wp\/v2\/comments?post=29732"}],"version-history":[{"count":0,"href":"https:\/\/lintyco.nl\/en\/wp-json\/wp\/v2\/posts\/29732\/revisions"}],"wp:attachment":[{"href":"https:\/\/lintyco.nl\/en\/wp-json\/wp\/v2\/media?parent=29732"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lintyco.nl\/en\/wp-json\/wp\/v2\/categories?post=29732"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lintyco.nl\/en\/wp-json\/wp\/v2\/tags?post=29732"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}