Continuous laminating method for composite floor

Abstract

The invention provides a continuous laminating method for a composite floor. The method comprises the steps that a base material, a surface plate and a bottom plate are selected and prepared; secondly, point type gluing is conducted on the base material through moisture curing reaction type polyurethane hot melt adhesive; thirdly, blank assembling is conducted, and the surface plate, the base material and the bottom plate are automatically and continuously assembled through accurate surface plate, base material and bottom plate positioning equipment, and are directly and automatically conveyed to enter a continuous press to be subjected to cold pressing; fourthly, continuous normal-temperature pressure applying is conducted; and fifthly, splitting is conducted, a floor blank obtained after cold pressing enters a multiple blade saw unit and is split into floor blank bodies equal in width, wherein a multiple blade saw is a composition unit of the continuous cold press and is arranged after the laminating procedure. The composite floor manufactured through the method has many beneficial effects that the glue spreading amount is small, glue spreading is uniform, the gluing strength is uniform, the inner stress of the floor is small, the size stability is high, free formaldehyde release is avoided, the product quality is high, and the cold pressing period is short; and the production technology is simple, energy consumption is low, the production efficiency is high, and continuous and automatic production can be achieved.

Description

technical field [0001] The invention relates to a composite floor continuous lamination method, which belongs to the technical field of building materials and furniture composite floor manufacturing. Background technique [0002] At present, composite floors are divided into two-layer, three-layer and multi-layer structures. Three-layer composite floors are composed of a surface board, a core board and a back board; two-layer and multi-layer composite floors are composed of a surface board and a base material. No matter what kind of composite floor, the glue lamination process is a key link in the manufacture of composite floor, which directly affects product quality and production efficiency. At present, the glue lamination methods are: periodic hot pressing with formaldehyde-containing adhesives such as urea-formaldehyde resin adhesives (UF), periodic cold pressing with water-based isocyanate adhesives (EPI) or reactive polyurethane hot melt adhesives (PUR). ) for continu...

AI Technical Summary

Problems solved by technology

[0003] In the traditional UF periodic hot-pressing process, due to the influence of the hot-pressing temperature, the moisture in the composite floor blank moves and evaporates, and the panel of the composite floor is easily affected by both water and heat, and the moisture content gradient formed in the slab , resulting in floor warping and deformation, and there are deficiencies such as long hot pressing cycle and release of free formaldehyde

In the EPI cold-pressing gluing process, EPI contains a lot of water, and the cold-pressing cycle is long. Even after a long-term health-care treatment, a certain number of products will still warp; the production capacity is low, and it is not easy to realize automatic operation.

Reactive polyurethane hot melt adhesive (PUR) is continuously cold-pressed. Due to the high price of PUR adhesive, there is currently a relatively high amount of adhesive (120-150g / m 2 ), the problem of high cost

In addition, at present, floor gluing mostly uses rubber rollers for surface gluing. In this gluing process, the thickness of the glue layer applied by the rubber roller to the gluing surface is not uniform, resulting in inconsistent floor bonding strength, and the size of floor products. Reduced stability

Images