The production of corrugated cardboard boxes is mainly divided into three stages: corrugated cardboard production → printing and slotting → forming and bonding. Both simple express boxes and complex outer packaging are all follow this basic way.
Stage1: Production of corrugated cardboard
This is the foundation that turns flat base paper into corrugated cardboard with good cushioning qualities. Pressing corrugated: The core paper is fed between high-temperature corrugated rollers and heated and pressurized to form a wavy "corrugated" core paper. Adhesive coating: Apply adhesive to the top of the corrugated board and stick it together with the surface paper and inner paper. Drying and shaping: The final strength of the cardboard box is determined by heating and cooling the adhesive.
Pressing corrugated: To create a wavy "corrugated" core paper, the core paper is heated and pressured while being fed between high-temperature corrugated rollers.
glue coating: Coat the top of the corrugated board with glue, then adhere the inner and surface papers together.
Drying and shaping: The final strength of the cardboard box is determined by heating and chilling the cardboard to completely cure the adhesive and make it flat.
Cut and press line: Press out the initial horizontal and vertical indentation after cutting the huge cardboard vertically in accordance with the order specifications.
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Stage 2: Printing and slotting
This step gives the cardboard a preliminary box structure and enables it to "speak." Box printing is typically flexographic printing, which uses water-based ink to print text, patterns, and barcodes on the cardboard's surface. Slotting and corner cutting: Use equipment to cut out the box's four "ears" (tongues) and remove extra corner material. Fine indentation: Press out more precise line marks at the areas that need to be folded to ensure that the box can be folded square.
Box printing is a type of flexographic printing where text, patterns, and barcodes are printed on cardboard using water-based ink.
Slotting and corner cutting: Cut off extra corner material and remove the box's four "ears" (tongues) using tools.
Fine indentation: To make sure the box can be folded squarely, make more exact line marks where it has to be folded.
Stage 3: Carton Forming
The last step is to "assemble" the flat cardboard into a three-dimensional box. Joining: Fold the slotted cardboard "ears" together and secure them in place. There are primarily two types of joining: nailing, which uses galvanized flat iron wire to nail into U-shaped nails and is frequently used for heavy-duty packaging; adhesive, which uses an eco-friendly glue that has a high bonding strength and smooth appearance and is frequently used for food and beverage packaging. Packaging and storage: Flatten, count, package, and tie the completed cardboard boxes before sending them to the warehouse for shipping.
Joining: Fold the cardboard "ears" with slots together and secure them. There are mostly two kinds:
Nailing: For heavy-duty packing, use galvanized flat iron wire to nail onto U-shaped nails.
Adhesive: Often used for food and beverage packaging, this environmentally friendly glue has a strong bonding strength and a smooth look.
Packing and storage: Before sending the completed cardboard boxes to the warehouse for shipping, they must be flattened, counted, packaged, and tied.
Generally speaking, the process of creating a board entails turning raw paper into corrugated cardboard, printing and slotting to impart shape and information, and shaping and gluing to create the finished assembly. These procedures can be accomplished all at once on modern production lines, turning raw materials into completed cardboard boxes in a matter of minutes.
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