A few key points to note: the folding direction and crease placement must be precise\u2014getting the direction wrong means the box won’t assemble correctly; glue dot placement and the amount of adhesive used affect the final shape; and poor tolerance control prevents the auto-lock bottom from securing tightly. For every structural design, prototypes undergo load-bearing tests and are verified using the actual product.<\/p>\n
The box bottom serves as the “foundation” of a folding carton. Choosing the right bottom structure ensures the box stands upright, supports weight effectively, and assembles quickly.<\/p>\n
The “auto-bottom” (or crash-lock bottom) is the high-efficiency option. It forms instantly with a single press, requiring no manual folding, making it ideal for high-speed automated packaging lines. While the structure is more complex than a standard lock-bottom\u2014resulting in slightly higher paper waste and costs\u2014the labor hours saved on large-volume, high-speed orders make it a cost-effective choice.<\/p>\n
The “tuck-in bottom” is the simple option. Flaps interlock to form the base; it is easy to assemble, low-cost, and suitable for lightweight products. While assembly is fast, its load-bearing capacity is limited, and the bottom may give way under heavy items. It is defined by being lightweight, fast, and economical.<\/p>\n
The “lock-bottom” is the workhorse option. Tabs interlock to create a stable, strong structure capable of bearing significant weight, making it a common choice for everyday color cartons. Assembly is slightly more complex but can be done either manually or by machine. For products requiring reliable load-bearing strength, the lock-bottom is the safe, standard choice.<\/p>\n
The bottom of a folding carton conceals some of the smartest structural mechanisms in packaging\u2014lock-bottom, tuck-in bottom, and auto-bottom\u2014allowing them to support weight with just a simple fold, without the need for glue. This article explains these bottom structures, which form the very foundation of the folding carton.<\/p>\n
How do you choose? Consider three dimensions: product weight (choose lock-bottom or auto-bottom for heavy items; tuck-in bottom suffices for light ones), packaging speed (use auto-bottom for automated lines), and cost (tuck-in is cheapest, lock-bottom is mid-range, and auto-bottom is most expensive). For most color carton orders, the lock-bottom offers the best balance of performance and cost.<\/p>\n
The bottom structure determines how the base of the carton is formed and dictates three key factors: load-bearing capacity, assembly speed, and production cost. Choosing the wrong structure can result in a box that won’t stand upright, assembles too slowly, or incurs excessive costs. Each of the three structural types serves a specific purpose.<\/p>","protected":false},"excerpt":{"rendered":"
A few key points to note: the folding direction and crease placement must be precise\u2014getting the direction wrong means the […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[26],"tags":[],"class_list":["post-1381","post","type-post","status-publish","format-standard","hentry","category-packaging-knowledge"],"_links":{"self":[{"href":"https:\/\/www.chengtop1.com\/fr\/wp-json\/wp\/v2\/posts\/1381","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.chengtop1.com\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.chengtop1.com\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.chengtop1.com\/fr\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.chengtop1.com\/fr\/wp-json\/wp\/v2\/comments?post=1381"}],"version-history":[{"count":2,"href":"https:\/\/www.chengtop1.com\/fr\/wp-json\/wp\/v2\/posts\/1381\/revisions"}],"predecessor-version":[{"id":1383,"href":"https:\/\/www.chengtop1.com\/fr\/wp-json\/wp\/v2\/posts\/1381\/revisions\/1383"}],"wp:attachment":[{"href":"https:\/\/www.chengtop1.com\/fr\/wp-json\/wp\/v2\/media?parent=1381"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.chengtop1.com\/fr\/wp-json\/wp\/v2\/categories?post=1381"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.chengtop1.com\/fr\/wp-json\/wp\/v2\/tags?post=1381"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}