{"id":30333,"date":"2026-10-09T09:01:37","date_gmt":"2026-10-09T01:01:37","guid":{"rendered":"https:\/\/lintyco.nl\/vffs-onderdelen\/"},"modified":"2026-10-09T09:01:37","modified_gmt":"2026-10-09T01:01:37","slug":"vffs-onderdelen","status":"publish","type":"post","link":"https:\/\/lintyco.nl\/en\/vffs-onderdelen\/","title":{"rendered":"VFFS Components: Forming Shoulder, Seam, and Sealing Jaws Explained"},"content":{"rendered":"

Anyone who has a vertical form, fill, and seal machine<\/a> When you buy it, you\u2019re buying a chain of components that follow one another in sequence. Each component has a function, a specification, and a wear pattern. This page walks you through the chain from the film roll to the cutting blade\u2014the same sequence that the film itself follows.<\/p>\n

The film drainage and wrapping<\/h2>\n

The roll is mounted on a take-off roller with a brake: too little braking causes waviness in the seam, while too much braking stretches the film. A dancer or control valve maintains a constant tension between 20 and 40 N. Guide rollers run along the winding shaft to keep the film aligned; wear on these rollers is visible as a lateral wall in the bag.<\/p>\n

The Form Shoulder<\/h2>\n

The forming shoulder bends the flat film into a bag tube\u2014the most demanding component of the machine. One pass per bag width; the surface is ground and polished so that the film glides around it without friction. A scratched forming shoulder leaves a permanent mark on the film. When changing sizes, replace the forming shoulder and tube as a pair: 10 to 30 minutes of work, as explained in format change<\/a>.<\/p>\n

The sea set and seal jaws<\/h2>\n

The sealing unit\u2014horizontal jaws beneath the tube\u2014seals the bag: first the bottom, and the same motion seals the top of the next bag. The jaws are heated to 120 to 180 degrees and have a Teflon coating that prevents the film from sticking. You can tell when they\u2019re worn out by the notches in the Teflon: the seam becomes uneven and starts to leak.<\/p>\n

The filling tube and metering flange<\/h2>\n

The filling tube conveys the product from the dosing device to the bag. At the bottom is the dosing flange\u2014a funnel-shaped outlet that allows the product to fall centrally and keeps the inside of the tube clean. For powders that settle under vacuum, the vent connection is also located here, which presses the bag wall against the product.<\/p>\n

The cutting blade and the control system<\/h2>\n

A blade that follows the wave motion cuts the bags open; a dull blade tears the film into fibers instead of cutting it. The control system\u2014a PLC with HMI interface\u2014links the drain valve, dosing unit, and receiving basin into a single cycle. Recipes for each product and size are stored in memory; a good control system turns the operator into a user rather than a setter. Around the machine, there should be auxiliary equipment<\/a>: elevators, screw conveyors, and checkweighers that complete the production line.<\/p>\n

\n\n\n\n\n\n\n\n\n\n
Component<\/th>\nPosition<\/th>\nWear Pattern<\/th>\nReplacement Time<\/th>\n<\/tr>\n<\/thead>\n
Form Shoulder<\/td>\nBending sheet metal into a tube<\/td>\nscratches, film marks<\/td>\nunder inspection, years<\/td>\n<\/tr>\n
Sea Set + Basin<\/td>\nsealing bags<\/td>\nnotches, leaking seam<\/td>\nTeflon every 3 to 6 months<\/td>\n<\/tr>\n
Filling Tube + Flange<\/td>\nguide the product<\/td>\nwear groove on granules<\/td>\nevery 1 to 2 years<\/td>\n<\/tr>\n
Cutting blade<\/td>\nsort bags<\/td>\nfibers, uneven cuts<\/td>\nsharpening every 500 hours<\/td>\n<\/tr>\n
Drain valve<\/td>\nfilm tension<\/td>\nseam waviness<\/td>\nbrake pads per year<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/figure>\n

Frequently Asked Questions<\/h2>\n

Q: What parts should I keep in stock?<\/strong><\/p>\n

Teflon seal rings, cutting blades, heating elements, and filters\u2014the set that maintenance schedule<\/a> ...also calls it. Any part that brings the line to a standstill overnight and can be delivered within 24 hours belongs in your inventory, not the supplier\u2019s.<\/p>\n

Q: Can I use third-party parts?<\/strong><\/p>\n

Technically, this is often the case; legally, it may sometimes violate your service contract; and it\u2019s always a matter to discuss with your supplier. The exception is consumables such as Teflon and blades: these can be universally specified based on size and temperature resistance.<\/p>\n

Q: How can I spot wear and tear before a malfunction occurs?<\/strong><\/p>\n

Three indicators: a seam that leaks occasionally, foil that wrinkles in different places, and a dose weight that gradually increases. Log these occurrences\u2014after ten incidents, the pattern points to a single component. More information about this method can be found at maintenance of a packaging machine<\/a>.<\/p>\n

Related pages<\/h2>\n

vertical form, fill, and seal machine<\/a> | auxiliary equipment<\/a> | format change<\/a> | What is a VFFS?<\/a> | maintenance of a packaging machine<\/a><\/p>\n

\n

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

A VFFS consists of a single line of components that must follow one another in sequence: film dispenser, forming shoulder, seaming unit, sealing jaws, and cutting blade. This wiki page explains each component, including its function, key specifications, and wear patterns\u2014the foundation for targeted maintenance and orders.<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_seopress_titles_title":"","_seopress_titles_desc":"VFFS-onderdelen uitgelegd: vormschouder, zeegset, sealbekken, vulbuis en besturing \u2014 met slijtage en vervangintervallen van folierol tot snijmes.","_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":[228,188,229],"class_list":["post-30333","post","type-post","status-publish","format-standard","hentry","category-blog","tag-onderdelen","tag-vffs","tag-vormschouder"],"_links":{"self":[{"href":"https:\/\/lintyco.nl\/en\/wp-json\/wp\/v2\/posts\/30333","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=30333"}],"version-history":[{"count":0,"href":"https:\/\/lintyco.nl\/en\/wp-json\/wp\/v2\/posts\/30333\/revisions"}],"wp:attachment":[{"href":"https:\/\/lintyco.nl\/en\/wp-json\/wp\/v2\/media?parent=30333"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lintyco.nl\/en\/wp-json\/wp\/v2\/categories?post=30333"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lintyco.nl\/en\/wp-json\/wp\/v2\/tags?post=30333"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}