Honeycomb panels are sheets made by bonding two thinner panels on both sides of a honeycomb core. The honeycomb core material may be kraft paper or aluminum sheet impregnated with synthetic resin (phenolic, polyester, etc.), and the panel may be selected from solid wood, aluminum plate, gypsum board, and natural marble. With the further improvement of the standard of the "Standards for Composite Wood Products Formaldehyde" in the United States, and the revision of the standard for formaldehyde release in interior decoration materials, wood-based panels and their products (GB18580-2001). Since the honeycomb panel is not like other wood-based panels, it needs to be filled with a large amount of formaldehyde-containing urea-formaldehyde resin, so its environmentally friendly and non-toxic green quality will make the honeycomb panel more and more applications.
The core material of the honeycomb core of the paper core only accounts for about 1% to 5% of the solid material, and the use of one ton of honeycomb material can replace the wood of 30 to 50 m3. The promotion of the use of composite honeycomb panels in the furniture manufacturing industry will greatly reduce the amount of wood used and improve the defects of wood-based panel deformation. Taking a 20 mm thick plate as an example, if a 2.5 mm MDF is used as a panel to make a honeycomb panel, the amount and weight of the material is only about 1/4 of that of the solid MDF; and the cost of the honeycomb panel is only a solid panel. About 1/2, and the honeycomb panel has the advantages of light weight, deformation resistance, and convenient transportation.
Honeycomb panels can be divided into framed honeycomb panels and frameless honeycomb panels.
Framed honeycomb panels will be framed according to the size of the sheet, then filled into the stretched and shaped honeycomb paper core, and coated on both sides with a solid wood, high density board or aluminum panel, and then cold Pressed into a composite honeycomb panel. The frameless honeycomb panel is a manufacturing process using a large plate (ie, 1220 mm × 2440 mm), and the frame core and the plate surface are first heat-pressed to form a frameless large-plate honeycomb panel. Frameless slab honeycomb panels can be cut to the required size with a computer panel saw. Then, through the frameless honeycomb edge banding machine, the edge of the supporting edge strip and the decorative side strip are formed, and the furniture panel of various specifications is formed.
The production of honeycomb panels requires a certain process and requires a series of equipment to produce. The configuration of the equipment and the efficiency of the processing, the quality of the product, and the cost of the investment are all very important. For framed honeycomb panels and frameless honeycomb panels, we will now introduce the production equipment for both panels.
1. Gluing equipment
The paper core of the honeycomb panel is bonded to the upper and lower panels, and the adhesive requires glue and glue equipment. Gluing equipment is divided into single-sided applicator and double-sided applicator. Gluing equipment should ensure that the amount of glue applied on the board is uniform and the amount of glue applied can be accurately controlled to reach the set amount of glue per square meter. These are two important performance requirements. The rubber roller is a key component of the rubber coating equipment. The material of the rubber roller and the running precision of the rubber roller are directly related to the quality of the rubber coating. At present, the general domestic rubber roller has a diameter of 190mm, the coating machine has a power of 1.5-3kw, and the production speed is 20m/min.
At present, there are some honeycomb panel bonding equipments in China. The front part of the combination equipment is a conveying roller. The frame of the core will be placed. After the double-sided coating equipment, the frame of the core will be evenly coated with adhesive. The panel is covered, and finally pressed into the rolling device at the back to realize the pressing of the honeycomb paper core and the upper and lower plates.
2 pressurizing equipment
Pressurization is an important device in the processing technology of honeycomb panels, and the pressurization equipment used in different process routes is also different. The pressurizing equipment is divided into a normal temperature pressurizing device (cold press) and a heating and pressurizing device (hot press). Cold pressing equipment is also divided into rolling equipment and flat pressure equipment. Rolling is used for the fast drying of the rubber compound, and the normal temperature is applied to the white latex which has a long drying time. Hot pressing equipment is commonly used in urea-formaldehyde glue, urea-formaldehyde resin heat curing, short time, low cost is currently commonly used rubber grade. However, urea-formaldehyde glue contains formaldehyde, which is very harmful to human health. PUR polyurethane hot melt adhesive on the market, is solvent-free, formaldehyde-free, heat-resistant and cold-resistant. It is an irreversible bonding method that reacts with moisture in the air. PUR polyurethane hot melt adhesives are more expensive than urea-formaldehyde adhesives, but the temperature of the sizing is more economical than the urea-formaldehyde adhesives.
There are 10 common cylinders for domestic hot presses. Each cylinder has a diameter of 100mm, the oil pump power is 2.2kw, the heating power is 36kw, and the maximum pressure is 120T. The domestic cold press has a general stroke of 800mm, a total pressure of 50T, and a motor power of 2.2kw.
3. Cutting equipment
The honeycomb slabs, which are glued together with the upper and lower panels and the honeycomb core board, are cut to the size of the parts to be used for the production of furniture. The sawing honeycomb panel generally adopts a computerized panel saw, and a precision push table saw can be selected according to the needs of the process. It has been proved by machining that selecting a suitable saw blade is of great significance for improving the quality of sawing and production efficiency. The domestic computer panel saw spindle speed is generally between 4700-4800r/min, the spindle diameter is between 350-400, the maximum additive thickness is between 80-100mm, and the maximum processing length is between 2600-3300mm.
4. Edge banding equipment
Framed Honeycomb Panels are available with a conventional edge banding machine due to the surrounding frame. The frameless honeycomb panel requires a special method because it has no surrounding frame and the strength of the paper core support panel is insufficient. There are now several ways to seal the edgeless honeycomb panels:
method one:
Embed the machine with a solid frame strip, first cut the paper core on the edge of the honeycomb panel, and then insert the solid border strip of the glue. After the honeycomb panel embedded with the solid bezel is dried, it is sealed with a conventional edge banding machine.
Method Two:
With the frameless honeycomb edge banding machine, the embedded edge band is sealed on the edge of the bare paper core of the honeycomb panel by an embedded method, and the ordinary edge banding is sealed on the outside.
Method three:
It is a method of manual edge sealing. First, the paper core on the side of the honeycomb panel is removed, and then the upper and lower panels are folded in a little to serve as a support. Finally, the ordinary edge banding will be carried out. This method requires calculation of the depth of the core and the size of the panel.
dining table set, dining table and chairs, extendable dining room table, dining room furniture sets
Auxford furniture , https://www.auxfurniture.com