Background technology
For a long time container bottom board with Southeast Asia broad-leaved hardwood such as clone's log etc. as primary raw material, under the in short supply day by day of the timber resources situation endangered with cloning log, fast-growing woods and bamboo material become the substitution material of a new generation, and the increasing producer and researcher have invested short, the cheap material of these growth cycles to sight.
Also there is correlative study person to begin research and development in recent years and adopts particieboard, the material of medium density fibre board (MDF) carries out the manufacturing of container bottom board, disclose as ZL200410010295.7 and a kind of particieboard to be put in the middle of the container bottom board, both sides wood composite veneer is done the method for container bottom board, because the process characteristic of particieboard has determined that the internal bond strength at particieboard center is relatively poor, it is a weak interface layer, according to mechanics principle, when container bottom board is subjected to load, maximum shearing force is being born at its center, therefore, particieboard is put in the worth discussion of method of container bottom board center.
Structural particleboard be a kind of be that raw material is processed into bigger flaking by special equipment with small dimension wood, thinnings, reel, slab, brush wood etc., drying, applying glue and specialized apparatus with the crisscross orienting spreading of flaking after, a kind of wood-based plate after hot-forming.Owing to adopted special process and many special equipments, so it has the bending strength height, and linear expansion coefficient is little, and dimensional stability is good, and nail-holding ability is strong, is easy to carry out advantages such as incrustation, is extensively applied to industries such as packing, building and shipping vehicle manufacturing.Bamboo chipboard has more extensive, the cheap advantage of raw material sources as one of structural particleboard new kind.
Therefore; how better utilization speed production-goods source and particieboard material; carry out reasonable structural design; under the prerequisite that satisfies the container instructions for use that guarantees container bottom board; for the container bottom board industry is opened up raw material sources widely; reduce the whole cost of container, the environment that better protects forest resources becomes container bottom board practitioner urgent problem.
Summary of the invention
At the deficiencies in the prior art, the invention provides a kind of container composite bottom board, structural particleboard and other veneer carry out reasonable structural design widely by using raw material sources, better performance different materials separately advantage on mechanical property and glue performance, to satisfy the instructions for use of container bottom board, reduce the forest reserves pressure to the container bottom board raw material supply in short supply, reduce the production cost of container bottom board.
For achieving the above object, the present invention is by the following technical solutions:
A kind of container composite bottom board, form by multilayer veneer and particieboard, comprise the top layer, intermediate layer and sandwich of layers, described top layer comprises upper epidermis and following top layer, described sandwich of layers comprises sandwich of layers and following sandwich of layers, the described sandwich of layers that goes up is between upper epidermis and described intermediate layer, described sandwich of layers down is down between top layer and the described intermediate layer, it is characterized in that, described sandwich of layers is a particieboard, and described top layer includes 1 layer of veneer at least, and described intermediate layer is made up of veneer, described intermediate layer include at least 1 layer rift grain long in plate, described each veneer and bamboo shaving plate are repressed, gummed forms.
In the present invention, the wood shavings of described particieboard use are wooden flake and/or bamboo flake.
In the present invention, described particieboard is an oriented wood chipboard, and described oriented wood chipboard comprises the wood shavings that wood shavings that the 2-5 layer is vertically mated formation and 1-3 layer are laterally mated formation.
In the present invention, described wood shavings are that thickness is 0.3-0.5mm, and length is the bamboo shaving of 60-120mm.
In the present invention, described veneer is bamboo veneer and/or veneer.
In the present invention, the outermost layer veneer on described upper epidermis and/or following top layer is a face crossing, and adjacent with described outermost layer veneer is plate in the 1-3 layer rift grain length.
In the present invention, the outermost layer veneer on described upper epidermis and/or following top layer is a plate in the rift grain length, and adjacent with described outermost layer veneer is 1 layer of face crossing.
In the present invention, described intermediate layer is that plate laminated forms in 3 layers of rift grains length.
In the present invention, described upper epidermis and/or down the outer surface of the outermost layer veneer on top layer be coated with one deck functional resin or post at least one deck Tetefol or post one deck resin immersion non-woven fabrics at least.
In the present invention, the described upper epidermis and/or the outermost layer veneer process resin impregnation process on top layer down
Compared with prior art, beneficial effect of the present invention is:
1, the present invention is by being positioned over structural particleboard the sandwich of layers position of container bottom board, reduce the particieboard center and bear shear action, better bring into play the high characteristics of structural particleboard bending strength, plate laminated satisfies the instructions for use of container bottom board to bring into play its anti-shear performance from integral body in the intermediate layer use is long simultaneously.
2, the present invention has adopted cheap, material source structural particleboard, fast growing wood and bamboo wood widely, as the container bottom board raw material, thereby has opened up new path for solving forest reserves production cost in short supply, that reduce container bottom board.
The specific embodiment
The present invention is described in further detail below in conjunction with the drawings and specific embodiments.
In the following embodiments, particieboard is oriented wood chipboard, be to be processed into bigger flaking by special equipment, drying, applying glue and specialized apparatus with the crisscross orienting spreading of flaking after, through the hot pressing aftershaping, it comprises wooden oriented wood chipboard and bamboo chipboard, and in view of the waterproof requirement of container bottom board, the particieboard of Shi Yonging all adopts water proofing property gluing agent such as phenolic resin adhesive or the agent of isocyanates gluing in the present embodiment.
In the present invention, so-called face crossing is the grain direction veneer parallel with the chassis of container width, bamboo curtain splint veneer; Plate was the grain direction veneer vertical with the chassis of container width, bamboo curtain splint veneer during so-called rift grain was long.
Embodiment one:
As shown in Figure 1, the width over side sills direction of container is A, and container of the present invention is with composite bottom board 1, is followed successively by upper epidermis 11 from top to bottom, goes up sandwich of layers 12, intermediate layer 13, sandwich of layers 14, top layer 15 down down.Wherein upper epidermis 11 is followed successively by plate 111, face crossing 112 in the length from outside to inside; Following top layer is followed successively by plate 151, face crossing 152 in the length from outside to inside; Last sandwich of layers 12 and following sandwich of layers 14 are the bamboo chipboard of thickness 11mm; The intermediate layer is that plate 131-133 lamination forms in continuous 3 layers long.
In the present embodiment, last sandwich of layers 12 and following sandwich of layers 14 employing bamboo chipboards, the wood shavings specification is that thickness is 0.3-0.5mm, and length is 60-120mm, and this bamboo chipboard is by 3 layers of vertical wood shavings and 2 layers of horizontal wood shavings crisscross composition.
Container is a Wooden veneer with the veneer that composite bottom board 1 adopts, in order to guarantee the anti-cutting performance in intermediate layer 13, it is plate laminated in the 1.5mm pine rift grain length that 3 layer thicknesses have been adopted in the intermediate layer, effectively increase the anti-shear ability in plate intermediate layer by the high characteristics of bonding strength between the plate in the rift grain length, as increase the intermediate layer rift grain long in the further reinforcement plate bulk strength longitudinally of quantity of plate, it is clone's veneer of 1.2mm that the outermost layer veneer on top layer adopts thickness, the face crossing adjacent with the outermost layer veneer is that thickness is 1.5mm eucalyptus veneer, also can adopt the higher broadleaf of other density to guarantee the base plate overall performance.
In the present embodiment, can also cover with paint, lacquer, colour wash, etc. the phenolic resins 110 and 150 that one deck has covering power and water-proof function on the outer surface of the outermost layer veneer on the upper and lower top layer of composite bottom board 1 at container.
In order better to guarantee the bending strength of container bottom board, it can further be adjusted into as shown in Figure 2 container with composite bottom board 2, comprises upper epidermis 21, goes up sandwich of layers 22, intermediate layer 23, sandwich of layers 24, top layer 25 down down.Upper epidermis 21 is followed successively by plate 211 in the length, face crossing 212, continuous 3 layers long middle plate 213-215 from outside to inside; Following top layer 21 is followed successively by plate 251 in the length from outside to inside, face crossing 252, continuous 3 layers long middle plate 253-255; Last sandwich of layers and following sandwich of layers are thickness 7mm bamboo chipboard; Intermediate layer 23 is plate 231-233 in 3 layers long.Wherein direction B is the chassis of container width.
It is 1.5mm pine veneer lamination that this container has adopted 3 layer thicknesses with the intermediate layer of composite bottom board 2, the outermost layer veneer on top layer adopts clone's veneer, all the other veneers adjacent with the outermost layer veneer are that thickness is 1.5mm eucalyptus veneer, this structure is by respectively increasing plate in 3 layers of rift grains length at upper epidermis and following top layer, reduce the thickness of bamboo chipboard simultaneously, with the intensity of better assurance container bottom board.
Embodiment two:
As shown in Figure 3, wherein the chassis of container width is C, and a kind of container of the present invention is with composite bottom board 3, and it comprises upper epidermis 31, goes up sandwich of layers 32, intermediate layer 33, sandwich of layers 34, top layer 35 down down.Wherein upper epidermis 31 is followed successively by face crossing 311, continuous plate 312-314 in three layers long from outside to inside; Following top layer 35 is followed successively by face crossing 351, continuous three layers long middle plate 352-354 from outside to inside; Last sandwich of layers 32 and following sandwich of layers 34 are thickness 8mm bamboo chipboard; Intermediate layer 33 forms for continuous 3 layers long middle plate 331-333 laminations.
In the present embodiment, sandwich of layers adopts the timber structure particieboard, and the wood shavings specification is that thickness is 0.3-0.5mm, and length is 40-130mm, and this timber structure particieboard is by 2 layers of vertical wood shavings and 1 layer of horizontal wood shavings crisscross composition.
In the present embodiment, can also cover with paint, lacquer, colour wash, etc. the phenolic resins 310 that one deck has covering power and water-proof function with the outer surface of the upper epidermis 31 outermost layer veneers of composite bottom board 3 at container, and the coatings surface is provided with wood texture 3100, texture is vertical with upper epidermis outermost layer veneer 3110, in the present embodiment, the outermost coatings of upper epidermis also can be one deck Tetefol or one deck resin immersion non-woven fabrics.
The following top layer outermost layer veneer 351 of present embodiment after can handling through resin impregnating, carries out assembly with other veneer and particieboard, hot pressing forms, thereby makes container also have good waterproof effect with the lower surface of composite bottom board 3.
The version of base plate can be as shown in Figure 4, a kind of container composite bottom board 4, it comprises upper epidermis 41, last sandwich of layers 42, intermediate layer 43, following sandwich of layers 44 and following top layer 45, wherein upper epidermis 41 is followed successively by face crossing 411, continuous two layers long middle plates 412,413 from outside to inside, and following top layer 45 is followed successively by face crossing 451, continuous two layers long middle plates 452,453 from outside to inside; Last sandwich of layers and following sandwich of layers are thickness 8mm bamboo chipboard; The intermediate layer is followed successively by face crossing 431, continuous 3 layers long middle plate 432-434, face crossing 435 from top to bottom.The structure of present embodiment had both guaranteed the bending resistance of the anti-shear ability and the sandwich of layers particieboard in intermediate layer, by increasing face crossing, to strengthen the transverse strength of base plate, the bending strength of plate during simultaneously suitable enhancing top layer is long can guarantee the bulk strength of container with composite bottom board 4 equally again.Wherein direction D is the chassis of container width.
Above embodiment has adopted veneer, and its veneer can be fast growing woods such as pine, eucalyptus, poplar, China fir, also can be deciduous species such as clone, leatherleaf Pometia spp, birch, peach blossom core, oak, lotus wood, toothed oak wood, terylene peach.Veneer can go out the specification that requirement is used by the direct rotary-cut of log, also can use the less veneer of specification to be overlapped to form desired specification in identical grain direction.The veneer of above embodiment can replace by some or all of employing bamboo veneer, also reaches same technique effect.
Above embodiment all the non-central location by particieboard being arranged at plate with the influence of the weak link that reduces particieboard self sandwich layer to base plate, and bring into play the strong advantage of its bending resistance, increase the cutting performance of plate by the intermediate layer laminated veneer lumber, suitably strengthen anti-bending strength on the top layer to guarantee the base plate overall performance, simultaneously also can utilize the fast growing wood advantage different to carry out structure optimization accordingly with bamboo wood, anti-bending strength as bamboo wood self is superior, can plate be to play humidification in the corresponding increase bamboo curtain splint in top layer is long, pine can be used in the intermediate layer more simultaneously, the superior fast growing wood of shear behaviors such as poplar is with the more reasonable advantage performance of the various materials of performance.
The product of above embodiment all is used for standard dry cargo container base plate commonly used at present, structural particleboard can be carried out assembly earlier in the specific implementation, after the compression moulding with veneer carry out compound, also can assembly, the back of colding pressing carries out the hot pressing one-shot forming with veneer that other constitutes base plate.In the present invention, container is 28mm (thickness is compressed in pressing process) with the thickness of composite bottom board, but be not limited thereto, the quantity that the present invention can be by adjusting veneer in each layer and the thickness of thickness and particieboard can be adjusted into base plate thickness 32mm, 35mm and 45mm to satisfy the needs of different chassis of container to container bottom board intensity and thickness.
The above; for the person of ordinary skill of the art; can make other various corresponding changes and distortion according to technical scheme of the present invention and technical conceive, and all these changes and distortion all should belong to the protection domain of accompanying Claim of the present invention.