Aldehyde-free thermoplastic adhesive film composite veneer coating device

Abstract

The invention discloses an aldehyde-free thermoplastic adhesive film composite veneer coating device. The device comprises a chain plate conveying device, an unwinding shaft and a hot-pressing bondingdevice, and the chain plate conveying device comprises a hot-pressing circulating chain plate and a supporting circulating chain plate located below the hot-pressing circulating chain plate. According to the above technical scheme, a veneer and a formaldehyde-free adhesive film are placed in a hot-pressing pressing channel, and the hot-pressing circulating chain plate and the supporting circulating chain plate are used for circularly and synchronously conveying the veneer and the formaldehyde-free adhesive film, thereby ensuring the sufficient time for hot pressing, improving the hot pressingefficiency. The hot-pressing bonding device on each chain plate unit in the hot-pressing circulating chain plate performs hot-pressing bonding on the veneer and the formaldehyde-free adhesive film, and the local adhesive film and the veneer are heated by the concentrated heat. Due to the fact that the hot-pressing bonding device is small in bonding heating bonding area and high in temperature, the moisture discharged by heating the veneers can be stored in the bonding space of the adjacent electric heating wires and the veneers, and the bonding of the adhesive films and the veneers is not affected, so that the veneers and the formaldehyde-free adhesive films are high in cooling speed after hot-pressing bonding, the cooling is not needed any more, and the energy consumption is reduced.

Description

technical field [0001] The invention relates to the field of veneer film coating, in particular to an formaldehyde-free thermoplastic adhesive film composite veneer film coating device. Background technique [0002] At present, in the process of using formaldehyde-free thermoplastic film to produce plywood, a layer of film is usually laid between two adjacent veneers to form a slab, which is then sent to a hot press machine for hot pressing and cold pressing. To make plywood, in order to prevent the misalignment of the film and the veneer, usually use hot melt adhesive or self-adhesive to attach the film and the veneer first, or alternately stack the formaldehyde-free film and the veneer with U-shaped plastic nails After nailing, prevent the slab from moving, and then carry out hot pressing. [0003] The Chinese utility model patent published on January 18, 2017, with the announcement number 205890107U, discloses a formaldehyde-free thermoplastic adhesive film composite ven...

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Problems solved by technology

[0003] The Chinese utility model patent published on January 18, 2017, with the announcement number 205890107U, discloses a formaldehyde-free thermoplastic adhesive film composite veneer film coating machine, including a conveyor belt device and a hot pressing device. The plates are sequentially transported to the hot pressing device for hot pressing, and then cooled after hot pressing. This patent needs to heat the hot pressing plate. The heating area of ​​the hot pressing plate is large, so a large pressure is required, and it needs to be cooled after heating, so it takes a lot of money. Multi-energy, unable to run continuously, low efficiency

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