CN217891242U

CN217891242U - Composite block board capable of facing wood shavings

Info

Publication number: CN217891242U
Application number: CN202221135264.4U
Authority: CN
Inventors: 陈辉; 方旭峥; 黄活阳; 徐华
Original assignee: Treezo New Meterial Science and Technology Group Co Ltd
Current assignee: Treezo New Meterial Science and Technology Group Co Ltd
Priority date: 2022-05-13
Filing date: 2022-05-13
Publication date: 2022-11-25
Anticipated expiration: 2032-05-13

Abstract

The utility model relates to an wood-based plate technical field is a but compound laminated wood board of veneer wood shavings, include by lower supreme lower top layer, inferior surface layer, sandwich layer, the top layer and the upper epidermis of bonding together in proper order, the sandwich layer is formed by the concatenation of lath strip, and the top layer of last time, inferior surface layer are formed by the bonding of large-piece wood shavings, and upper epidermis, lower surface layer are formed by the bonding of wooden thin material. The utility model has the advantages of low deformation, high surface flatness, high transverse static bending strength and log characteristic reservation.

Description

Composite block board capable of facing wood shavings

Technical Field

The utility model relates to an artificial board technical field is a but compound laminated wood board of veneer wood shavings.

Background

The core board is a special plywood formed by gluing and pressing two or more layers of plywood covered on two surfaces of a core board made of wood laths spliced or hollow boards on the basis of plywood production to form an ecological board substrate, and the core board of the core board made of the wood laths spliced and glued on the side surfaces is used for home decoration boards, so that the form of raw wood is reserved, and the core board has the characteristics of nature and environmental protection; in order to achieve the purpose that the surface of the block board can be directly decorated, at present, the block board which can be directly decorated can be prepared by uniformly mixing wood fibers or wood shavings with an adhesive, directly paving the mixture on the upper surface and the lower surface of a common block board, and then carrying out high-temperature hot pressing.

However, the core board of the core board is laterally pressed when being spliced, and the adhesive is coated on the side surface of the core board, so that when being hot-pressed, the core board has larger compression amount of the base material of the core board due to larger hot-pressing pressure and has no structure for supporting the stress of the side surface, thereby easily causing the deformation of the finished board, and the whole board has different thickness, lower transverse static bending strength and poor quality and can not meet the application requirements of the standard.

For example, chinese patent publication No. CN111002425A discloses a method for manufacturing an ecological plate with wood shaving composite veneer, which comprises the following specific steps: 1) Adhering wood shavings by using an adhesive, and applying and stirring the wood shavings into the shavings; 2) <xnotran> 5~21mm, 2450~2750mm, 1230~1310mm , , , , , 3) , ; </xnotran> 4) After hot pressing, air blowing and cooling for more than 5min, and then collecting and stacking to obtain a plate blank; 5) Naturally curing the plate blank for more than 7 days, and sawing edges, sanding and determining thickness; 6) Sanding a plate blank with a fixed thickness, and pressing and sticking impregnated film paper on the upper plate surface and the lower plate surface; 7) And hot pressing to obtain the ecological plate finished product. Because the veneers after glue mixing are directly paved on the upper surface and the lower surface of the core board of the block board, the defect that the transverse strength of the core board of the block board is insufficient due to insufficient transverse stress support is overcome, and the hot press forming product is cracked, deformed and has insufficient transverse static bending strength.

Chinese patent publication No. CN110962192A discloses a method for manufacturing a wood fiber composite veneer ecological board, which comprises the following specific steps: 1) Selecting wood fibers, adopting an adhesive for adhesion, applying and stirring the wood fibers in the fibers; 2) <xnotran> 5~21mm, 2450~2750mm, 1230~1310mm , , , , , ; </xnotran> 3) After paving, performing high-temperature hot pressing; 4) After hot pressing is finished, air blowing and cooling are carried out for more than 5min, and then plates are collected and stacked to obtain plate blanks; 5) Naturally curing the plate blank for more than 7 days; 6) Sanding a plate blank with a fixed thickness, and pressing and sticking impregnated film paper on the upper plate surface and the lower plate surface; 7) And hot pressing to obtain the finished product of the composite facing ecological plate. Similarly, because the glued wood fibers are directly paved on the upper surface and the lower surface of the core-board of the block board, the transverse stress does not exist enough to support the defect of insufficient transverse strength of the core-board of the block board, thereby causing the cracking, the board surface deformation and the insufficient transverse static bending strength of the hot-press formed product.

Chinese patent publication No. CN111231024A, which discloses a composite artificial board with corrosion resistance, mould resistance and high flame resistance, the composite artificial board is composed of a decorative layer and a slab layer which are combined arbitrarily; the veneer layer is made of wood materials or non-wood materials, wherein the wood materials comprise wood shavings, wood fibers, cotton stalks and mushroom bran; the blank layer is plywood, a blockboard, an oriented strand board or a straw board, and the wood material is directly paved on the blockboard, so that the product is easy to deform and has poor quality during hot pressing.

Disclosure of Invention

The utility model provides a but compound laminated wood board of veneer wood shavings has overcome above-mentioned prior art not enough, and it can effectively solve current but compound laminated wood board of veneer wood shavings existence product quality is poor, the deflection is big, the problem that horizontal static bending strength is low.

The technical scheme of the utility model is realized through following measure: the veneer-faced wood shaving composite core-board comprises a lower surface layer, a core layer, a last time surface layer and an upper surface layer which are sequentially bonded from bottom to top, wherein the core layer is formed by splicing batten strips, the last time surface layer and the lower surface layer are formed by bonding large wood shavings, the large wood shavings are directionally paved or uniformly paved in a criss-cross mode, and the upper surface layer and the lower surface layer are formed by bonding wooden fine materials.

The following are further optimization or/and improvement of the technical scheme of the utility model:

the length of the large flakes can be 6cm to 10cm, the width of the large flakes can be 1cm to 3cm, and the thickness of the large flakes can be 0.25mm to 0.45mm.

The large flakes can be uniformly spread, the number of the transverse large flakes accounts for 40-55% of the total amount of the large flakes, and the number of the longitudinal large flakes accounts for 45-60% of the total amount of the large flakes.

The previous surface layer and the next surface layer are all directional shaving board structures formed by paving large-scale shavings in a criss-cross directional paving mode.

The quality requirements of the wood fine materials are as follows: the size of the sieving net is as follows: not more than 1.4mm, not less than 0.11mm.

The core layer can be a core board of a core-board or an integrated material board; the length of the core layer is 2450mm to 2750mm, the width of the core layer is 1250mm to 1350mm, and the thickness of the core layer is 12mm to 20mm.

The thicknesses of the previous surface layer and the next surface layer can be 1mm to 4mm, the lengths of the previous surface layer and the next surface layer are 2450mm to 2750mm, and the widths of the previous surface layer and the next surface layer are 1250mm to 1350mm.

The utility model has the advantages of low deformation, high surface flatness, high transverse static bending strength and log characteristic reservation.

Drawings

Fig. 1 is a schematic front view structure diagram of a first embodiment and a second embodiment of the present invention.

The codes in the figures are respectively: 1 is the lower skin, 2 is the next skin, 3 is the core, 4 is the last skin, and 5 is the upper skin.

Detailed Description

The utility model discloses do not receive the restriction of following embodiment, can be according to the utility model discloses a technical scheme and actual conditions determine concrete implementation.

In the present invention, for convenience of description, the description of the relative position relationship of the components is described according to the layout mode of the attached drawing 1 in the specification, such as: the positional relationship of front, rear, upper, lower, left, right, etc. is determined in accordance with the layout direction of the drawings of the specification.

The invention will be further described with reference to the following examples and drawings:

in the first embodiment, as shown in fig. 1, the veneerable wood shaving composite core-board comprises a lower surface layer 1, a lower sub-surface layer 2, a core layer 3, a upper sub-surface layer 4 and an upper surface layer 5 which are sequentially bonded together from bottom to top, wherein the core layer 3 is formed by splicing wood laths, the upper sub-surface layer 4 and the lower sub-surface layer 2 are formed by bonding large pieces of wood shavings, the large pieces of wood shavings are paved in a criss-cross oriented manner or uniformly, and the upper surface layer 5 and the lower surface layer 1 are formed by bonding wood fine materials.

Surface layer 4 last time, next time surface layer 2 is formed by the bonding of big piece wood shavings and big piece wood shavings adopt vertically and horizontally staggered orientation to mat formation or evenly mat formation, surface layer 4 last time from this, next time surface layer 2 has high static bending strength, high bonding strength, have enough transverse stress to support the defect that 3 transverse strength of sandwich layer is not enough, improve the horizontal static bending strength of product, reduce the product deflection, it is big to avoid leading to the finished product board deflection because of the great of the compressive strain when 3 hot pressing of sandwich layer, the face tympanic bulla, circumstances such as fracture take place, surface smoothness is high behind the wooden thin material press forming in addition, can direct veneer processing.

The first embodiment can be further optimized or/and improved according to actual needs:

preferably, the length of the large flakes is 6cm to 10cm, the width of the large flakes is 1cm to 3cm, and the thickness of the large flakes is 0.25mm to 0.45mm. The big piece of wood shavings is big, thickness is thin, and the last time top layer, the next time top layer that form by the big piece is planed the suppression and is had high static bending strength, high bonding strength, has enough transverse stress to support the not enough defect of sandwich layer transverse strength, guarantees that the product has good horizontal static bending strength.

The previous surface layer and the next surface layer are all directional shaving board structures formed by paving large-scale shavings in a criss-cross directional paving mode. The large wood shavings are directionally paved in a criss-cross mode, namely the large wood shavings are paved into a multi-layer structure, between every two adjacent two-layer structures, the large wood shavings on one layer are longitudinally arranged according to the fiber direction of the large wood shavings, the large wood shavings on the other layer are transversely arranged according to the fiber direction of the large wood shavings, and therefore the directional wood shavings plate structure formed by the large wood shavings which are directionally paved in a criss-cross mode has the advantages of being high in static bending strength and high in gluing strength.

Preferably, the wood fines quality requirements are: the size of the screen: 1.4mm, 0.11mm. The wood fine material has small grain diameter, high surface flatness after compression molding and can be directly used for facing processing.

Preferably, the core layer 3 is a core board of a core-board or an integrated board; the length of the core layer 3 is 2450mm to 2750mm, the width of the core layer 3 is 1250mm to 1350mm, and the thickness of the core layer 3 is 12mm to 20mm. Thus, the shape of the log is kept, and the natural environment-friendly performance is achieved.

Preferably, the thickness of the previous surface layer 4 and the next surface layer 2 is 1mm to 4mm, the length of the previous surface layer 4 and the next surface layer 2 is 2450mm to 2750mm, and the width of the previous surface layer 4 and the next surface layer 2 is 1250mm to 1350mm. The thickness of the previous surface layer 4 and the next surface layer 2 is extremely thin, and the characteristics of the core-board logs are greatly kept on the premise of ensuring good transverse static bending strength.

Example two: as shown in fig. 1, the present embodiment is different from the first embodiment only in that: the large-piece wood shavings are uniformly paved, the number of the transverse large-piece wood shavings accounts for 40 to 55 percent of the total amount of the large-piece wood shavings, and the number of the longitudinal large-piece wood shavings accounts for 45 to 60 percent of the total amount of the large-piece wood shavings. Therefore, the ultrathin shaving board formed by uniformly paving large pieces of wood shavings has high static bending strength and bonding strength, has the defect of insufficient transverse strength of enough transverse stress supporting core layers, and solves the defects of cracking, board deformation and insufficient transverse static bending strength of boards after hot pressing.

Comparative example four: the veneer-faced wood shaving composite core-board comprises a lower surface layer, a core layer and an upper surface layer which are sequentially bonded together from bottom to top, wherein the core layer is formed by splicing wood laths, and the upper surface layer and the lower surface layer are formed by bonding wood fine materials.

The surface bonding strength, the transverse static bending strength, the 24-hour water absorption thickness expansion rate and the deformation of the products in the first embodiment, the second embodiment and the fourth comparative embodiment are tested according to the standard of GB/T17657-2013 physicochemical property test method for artificial boards and veneered artificial boards, and the obtained results are shown in the following table 1.

Above technical feature constitutes the utility model discloses a best embodiment, it has stronger adaptability and best implementation effect, can increase and decrease unnecessary technical feature according to actual need, satisfies the demand of different situation.

Claims

1. The veneer-faced wood shaving composite core board is characterized by comprising a lower surface layer, a core layer, a last surface layer and an upper surface layer which are sequentially bonded from bottom to top, wherein the core layer is formed by splicing wood laths, the last surface layer and the lower surface layer are formed by bonding large wood shavings, the large wood shavings are directionally paved or uniformly paved in a criss-cross mode, and the upper surface layer and the lower surface layer are formed by bonding wooden fine materials.

2. The veneerable wood shaving composite core board of claim 1, wherein the length of the strands is 6cm to 10cm, the width of the strands is 1cm to 3cm, and the thickness of the strands is 0.25mm to 0.45mm.

3. The veneerable wood shaving composite core board of claim 1 or 2, wherein the upper surface layer and the lower surface layer are all oriented wood shaving board structures formed by paving large pieces of wood shavings in a criss-cross oriented paving manner.

4. The veneerable wood shaving composite core board of claim 1 or 2, wherein the large strands are laid uniformly, and the number of transverse large strands is 40 to 55% of the total large strands and the number of longitudinal large strands is 45 to 60% of the total large strands.

5. The veneerable wood shaving composite core board of claim 1 or 2, wherein the thickness of the previous surface layer and the next surface layer is 1mm to 4mm, the length of the previous surface layer and the next surface layer is 2450mm to 2750mm, and the width of the previous surface layer and the next surface layer is 1250mm to 1350mm.

6. The veneerable particle board of claim 3, wherein the thickness of the previous and next skins is from 1mm to 4mm, the length of the previous and next skins is from 2450mm to 2750mm, and the width of the previous and next skins is from 1250mm to 1350mm.

7. The veneerable particle board of claim 4, wherein the thickness of the previous and next skins is from 1mm to 4mm, the length of the previous and next skins is from 2450mm to 2750mm, and the width of the previous and next skins is from 1250mm to 1350mm.

8. The veneerable wood shaving composite core board of claim 1 or 2 or 6 or 7 wherein the wood fines quality requirement is: the size of the sieving net is as follows: 1.4mm, 0.11mm.

9. The veneerable particle board composite core board of claim 1 or 2 or 6 or 7 wherein the core layer is a core board or a core board; the length of the core layer is 2450mm to 2750mm, the width of the core layer is 1250mm to 1350mm, and the thickness of the core layer is 12mm to 20mm.

10. The veneerable wood shaving composite core board of claim 3, wherein the core layer is a core board or a core board; the length of the core layer is 2450mm to 2750mm, the width of the core layer is 1250mm to 1350mm, and the thickness of the core layer is 12mm to 20mm.