阅读说明：本技术 一种复合型材及其制造方法 (Composite section bar and manufacturing method thereof ) 是由 李小科 吴丽虹 沈浮 翁园园 姜俊 杨旭 吴玉琪 于 2019-11-19 设计创作，主要内容包括：本申请实施例公开了一种复合型材及其制造方法,由上至下依次包括相互胶粘结合的装饰层、混合强度层、平衡底层,所述混合强度层包括相互混合且通过胶粘剂粘结的中型硬木削片、木质刨花,所述中型硬木削片的长度为60-100mm、宽度为15-20mm、厚度为0.7-1.0mm。根据本发明的一种复合型材及其制造方法,在解决了实木地板端头废料的用途问题的同时,还具有产品结构简单、产品性能相对较好、附加价值相对较高、制造方法适于量产的优点。(The embodiment of the application discloses composite section bar and manufacturing method thereof includes adhesive bonding's decorative layer, mixed strength layer, balanced bottom each other in proper order from top to bottom, the mixed strength layer is including the medium-sized hardwood chipping, the wooden wood shavings that intermix and bond through the adhesive, the length of medium-sized hardwood chipping is 60-100mm, the width is 15-20mm, thickness is 0.7-1.0 mm. According to the composite section and the manufacturing method thereof, the problem of application of the end waste of the solid wood floor is solved, and the composite section has the advantages of simple product structure, relatively good product performance, relatively high added value and suitability for mass production.)

1. The utility model provides a composite section bar, its characterized in that includes adhesive bonding's decorative layer (100), mixed strength layer (200), balanced bottom (300) each other in proper order from top to bottom, mixed strength layer (200) are including the medium-sized hardwood chipping, the wooden wood shavings that intermix and bond through the adhesive, the length of medium-sized hardwood chipping is 60-100mm, the width is 15-20mm, thickness is 0.7-1.0 mm.

2. A composite profile according to claim 1, characterised in that the mixed strength layer (200) further comprises wood fibres mixed with the medium-sized hardwood chips, the wood shavings and bonded by means of an adhesive.

3. A composite profile according to claim 1, characterised in that the decorative layer (100) comprises small hardwood chips bonded by means of an adhesive, the small hardwood chips having a length of 40-80mm, a width of 5-10mm and a thickness of 0.5-0.8 mm.

4. A composite profile according to claim 3, characterised in that the decorative layer (100) also comprises wood fibres mixed with the small hardwood chips and bonded by means of an adhesive.

5. A composite profile according to claim 4, characterised in that the fibre direction of the medium-sized hardwood chips, the wood shavings in the mixed-strength layer (200) is arranged transversally and the fibre direction of the small-sized hardwood chips of the decorative layer (100) is arranged longitudinally.

6. A composite profile according to claim 1, characterised in that the balancing bottom layer (300) is a cork mat.

7. The manufacturing method of the composite section is characterized by sequentially comprising the following production steps of:

step 1, softening hardwood raw materials;

step 2, taking softened hardwood raw materials, and manufacturing medium-sized hardwood chips and small-sized hardwood chips, wherein the medium-sized hardwood chips are 60-100mm in length, 15-20mm in width and 0.7-1.0mm in thickness, and the small-sized hardwood chips are 40-80mm in length, 5-10mm in width and 0.5-0.8mm in thickness;

step 3, respectively drying the medium-sized hardwood chips and the small-sized hardwood chips until the water content of the medium-sized hardwood chips is 20-25%;

step 4, uniformly mixing the dried medium-sized hardwood chips with wood shavings to form a medium-sized hardwood chip-wood shavings mixed material;

step 5, carrying out secondary drying on the medium-sized hardwood chipping-wood shaving mixed material until the water content of the medium-sized hardwood chipping-wood shaving mixed material is 8-12%;

step 6, glue mixing is carried out on the medium-sized hardwood chippings-wood shavings mixed material, and glue mixing is carried out on the small-sized hardwood chippings;

step 7, assembling, namely paving a layer of soft wood chips after glue mixing on the bottom layer, paving a layer of mixed material of medium-sized hardwood chips and wood shavings after glue mixing on a soft wood chip layer, and paving a layer of small-sized hardwood chips after glue mixing on the mixed material layer of the medium-sized hardwood chips and the wood shavings;

and 8, preparing the composite section after mould pressing.

8. A method as claimed in claim 7, wherein the step 1 of softening the hardwood raw material comprises the steps of:

step 1, performing water bath treatment on the hardwood raw material, wherein the water bath treatment temperature is 45-55 ℃, and the treatment time is 60-90 min;

and 2, placing the hardwood raw material subjected to the water bath treatment on a lower hot pressing plate in a manner that the upper surface and the lower surface of the hardwood raw material correspond to the hot pressing plate, lowering the upper hot pressing plate to contact the hardwood raw material, and performing non-pressure hot plate softening treatment on the hardwood raw material, wherein the non-pressure hot plate softening treatment temperature is 120-135 ℃ and the treatment time is 60-90 min.

9. The method as claimed in claim 7, wherein the step 4 further comprises mixing the medium-sized hardwood chipped wood shaving mixture with wood fibers and mixing the small-sized hardwood chipped wood with wood fibers to form the medium-sized hardwood chipped wood shaving-wood fiber mixture and the small-sized hardwood chipped wood-wood fiber mixture, respectively; in step 5, the medium-sized hardwood chipped-wood shavings-wood fiber mixed material and the small-sized hardwood chipped-wood fiber mixed material are subjected to secondary drying until the water contents of the medium-sized hardwood chipped-wood shavings-wood fiber mixed material and the small-sized hardwood chipped-wood fiber mixed material are 8-12%.

10. A method of manufacturing a composite profile according to claim 7, wherein in step 8, the ratio between the time of the press-moulding and the thickness of the composite profile is 80-120 s/mm.

Technical Field

The application relates to the technical field of wood profiles, in particular to a composite profile, and also relates to a manufacturing method of the composite profile.

Background

Solid wood flooring is a floor covering material with a long history of use. In the production and processing process of the solid wood floor, end wastes with different specifications can be formed due to the processing of peripheral tongues and grooves or lock catches, the board changing (generally, length changing) of defective boards and the like. The end waste typically has a longitudinal dimension of 10-80mm and a transverse dimension of 60-120 mm. On one hand, limited by the minimum processing specification of processing equipment such as four-side planing, double-end milling and the like, the end waste of the specification cannot be processed to be made into the solid wood floor again; meanwhile, on the other hand, the paving efficiency of the solid wood floor with too small specification is too low, and the practical operability is not realized. Conventionally, end waste of solid wood floor is used as fuel for boilers, but as electric boilers are popularized, boilers using burning wood as energy are gradually eliminated, and therefore, the end waste can not be used as fuel any more.

In conclusion, how to utilize the end waste of the solid wood floor is a problem to be solved urgently.

Disclosure of Invention

A first technical object of the present invention is to overcome the above-mentioned problems, and to provide a composite profile, which is manufactured by mixing and bonding end scraps, made of hardwood chips, with wood shavings to form a mixed strength layer, and bonding a decorative layer and a balance bottom layer to the upper and lower portions of the mixed strength layer, respectively, so that the problem of utilizing the end scraps can be solved more effectively, and which has relatively good dimensional stability, mechanical properties, and adhesive strength. A second technical object of the present invention is to provide a method for manufacturing the above composite profile.

In order to achieve the first technical object, the invention provides a composite profile, which sequentially comprises a decorative layer, a mixed strength layer and a balance bottom layer from top to bottom, wherein the decorative layer, the mixed strength layer and the balance bottom layer are bonded with each other through adhesive, the mixed strength layer comprises medium-sized hardwood chips and wood shavings which are mixed with each other and bonded through adhesive, and the medium-sized hardwood chips have the length of 60-100mm, the width of 15-20mm and the thickness of 0.7-1.0 mm.

Borrow by above-mentioned structure, through making into hardwood chipping with the end waste material, mix with wooden wood shavings and bond in order to form the mixed strength layer through the adhesive to bond respectively in the upper portion and the lower part on mixed strength layer and set up the decorative layer and balance the bottom in order to make the novel composite sectional material of this application technical scheme, thereby solved the usage problem of solid wood floor end waste material.

The end waste material has relatively small specification, and can be directly put into the chip making equipment in the prior art to make hardwood chips with various specifications, so that the hardwood chips can be made by using the end waste material relatively easily, and the process is simple. Meanwhile, the hardness of the hardwood material is relatively high, and the adhesive property of chips prepared from the hardwood material is relatively poor, so that the mechanical strength and the adhesive property of the composite sectional material prepared by directly utilizing the hardwood chips are relatively poor; in this application technical scheme, through cutting the hardwood piece and mixing with wooden wood shavings, utilize wooden wood shavings as the hardwood and cut the bonding transition material between the piece with the hardwood to can improve composite sectional material's adhesive property relatively effectively, and improve its mechanical strength.

In conclusion, the composite section bar solves the problem of application of the solid wood floor end waste, and simultaneously is an end waste utilization scheme which is simple in product structure, relatively good in product performance and relatively high in additional value.

Preferably, the mixed strength layer further comprises wood fibers mixed with the medium size hardwood chips, the wood strands and bonded by an adhesive.

In this technical scheme, the wood fibre can fill the space between medium-sized hardwood chipping, the wooden wood shavings to improve the mechanical strength of composite section bar and the bonding strength of adhesive.

Preferably, the decorative layer comprises small hardwood chips bonded by an adhesive, the small hardwood chips having a length of 40-80mm, a width of 5-10mm and a thickness of 0.5-0.8 mm.

The hardwood chips with relatively small size have relatively good machining performance, particularly sanding performance, so that in the technical scheme, the composite sectional material has relatively good surface machining performance by bonding and compounding small hardwood chips to form the decorative layer, and is beneficial to later-stage machining; meanwhile, the composite layer of the small hardwood chippings is used as a decorative layer, and the decorative effect of the precious hardwood can be utilized.

Preferably, the decorative layer further comprises wood fibers mixed with the small hardwood chips and bonded by an adhesive.

In this technical scheme, the wood fiber can fill the space between the small-size hardwood chipping to improve the mechanical strength of composite section bar, the cohesive strength of adhesive, and can do benefit to surface finish property.

Preferably, the fiber direction of the medium-sized hardwood chips and the fiber direction of the wood shavings in the mixed strength layer are arranged in the transverse direction, and the fiber direction of the small-sized hardwood chips in the decorative layer is arranged in the longitudinal direction.

Preferably, the thickness ratio among the decorative layer, the mixed strength layer and the balance bottom layer is (0.2-0.3):1 (0.08-0.15).

In the technical scheme, when no wood fiber is added into the mixed strength layer and the decorative layer, the thickness limit among the balance bottom layer, the mixed strength layer and the decorative layer is the limit among the softwood chips, the medium hardwood chips and the small hardwood chips; when wood fiber is added into the mixed strength layer and the decorative layer, the thickness limit among the balance bottom layer, the mixed strength layer and the decorative layer is still subject to the limit among the softwood chips, the medium hardwood chips and the small hardwood chips.

Preferably, the balancing bottom layer is a cork cushion layer.

In order to achieve the second technical object, the invention provides a manufacturing method of a composite section, which sequentially comprises the following production steps:

step 1, softening hardwood raw materials;

step 2, taking softened hardwood raw materials, and manufacturing medium-sized hardwood chips and small-sized hardwood chips, wherein the medium-sized hardwood chips are 60-100mm in length, 15-20mm in width and 0.7-1.0mm in thickness, and the small-sized hardwood chips are 40-80mm in length, 5-10mm in width and 0.5-0.8mm in thickness;

step 3, respectively drying the medium-sized hardwood chips and the small-sized hardwood chips until the water content of the medium-sized hardwood chips is 20-25%;

step 4, uniformly mixing the dried medium-sized hardwood chips with wood shavings to form a medium-sized hardwood chip-wood shavings mixed material;

step 5, carrying out secondary drying on the medium-sized hardwood chipping-wood shaving mixed material until the water content of the medium-sized hardwood chipping-wood shaving mixed material is 8-12%;

step 6, glue mixing is carried out on the medium-sized hardwood chippings-wood shavings mixed material, and glue mixing is carried out on the small-sized hardwood chippings;

step 7, assembling, namely paving a layer of soft wood chips after glue mixing on the bottom layer, paving a layer of mixed material of medium-sized hardwood chips and wood shavings after glue mixing on a soft wood chip layer, and paving a layer of small-sized hardwood chips after glue mixing on the mixed material layer of the medium-sized hardwood chips and the wood shavings;

and 8, preparing the composite section after mould pressing.

By means of the manufacturing method, the machining performance of the hardwood raw material can be improved by softening the hardwood raw material, the manufacturing of chips is facilitated, and the adhesive performance and the plasticity of the prepared medium-sized hardwood chips and small-sized hardwood chips are improved to a certain extent; then, mixing the medium-sized hardwood chips and wood shavings which are dried to the water content of 20-25%, and drying together to obtain a medium-sized hardwood chip-wood shavings mixed material with the water content of 8-12%, so that the wood shavings can be used as an adhesive intermediate medium between the medium-sized hardwood chips, and the adhesiveness of the medium-sized hardwood chips is improved; finally, when the group base, regard as balanced bottom, regard as the decorative layer with small-size hardwood chipping lamella with the softwood lamella to balanced layer can provide the structural stability of this kind of composite sectional material, the effect of silence, and the decorative layer can make it have relatively better surface finish ability, does benefit to later stage machining (for example sand, lacquer decorations etc.), simultaneously, regards as the decorative layer with the composite bed of small-size hardwood chipping, can also utilize the decorative effect of precious hardwood. In conclusion, the manufacturing method of the composite section solves the application problem of the end waste of the solid wood floor, and meanwhile, the method solves the technical problems that hard broad-leaved wood is difficult to manufacture chips and the manufactured chips are difficult to bond to form a composite board in the prior art, so that an end waste utilization scheme which is relatively simple in manufacturing method and relatively high in additional value is provided.

Preferably, in step 1, the method of softening the hardwood raw material comprises the following steps:

step 1, performing water bath treatment on the hardwood raw material, wherein the water bath treatment temperature is 45-55 ℃, and the treatment time is 60-90 min;

and 2, placing the hardwood raw material subjected to the water bath treatment on a lower hot pressing plate in a manner that the upper surface and the lower surface of the hardwood raw material correspond to the hot pressing plate, lowering the upper hot pressing plate to contact the hardwood raw material, and performing non-pressure hot plate softening treatment on the hardwood raw material, wherein the non-pressure hot plate softening treatment temperature is 120-135 ℃ and the treatment time is 60-90 min.

In the present solution, the hardwood raw material can be pre-softened in one aspect by subjecting it to a water bath in water at 45-55 ℃; directly arrange the hardwood material in the hot press and do the non-pressure softening treatment, if the hardwood material is in when low moisture content, can't play the effect of softening treatment, if the hardwood material is in when the moisture content that can be softened, its wood fiber's horizontal bonding strength is less than soft wood (fast growing wood species), can explode when upper and lower hot pressboard is opened, make hardwood raw and other materials damaged before the chipping or have inside damage, the shape of the chipping of influence preparation, consequently, the initial moisture content of hardwood raw and other materials can be improved in another aspect to the water bath treatment, initial temperature, guarantee the structural integrity of hardwood material after the softening treatment. Particularly, the processing temperature and the processing time within the range can effectively avoid the carbonization phenomenon of the hardwood raw material in the non-pressure hot plate softening process, and the high-temperature and high-humidity processing can improve the dimensional stability of the material to a certain extent.

Preferably, in step 4, the method further comprises the steps of mixing the medium-sized hardwood chipped-wood shaving mixed material with wood fiber and mixing the small-sized hardwood chipped with wood fiber to form a medium-sized hardwood chipped-wood shaving-wood fiber mixed material and a small-sized hardwood chipped-wood fiber mixed material respectively; in step 5, the medium-sized hardwood chipped-wood shavings-wood fiber mixed material and the small-sized hardwood chipped-wood fiber mixed material are subjected to secondary drying until the water contents of the medium-sized hardwood chipped-wood shavings-wood fiber mixed material and the small-sized hardwood chipped-wood fiber mixed material are 8-12%.

In the technical scheme, the wood fiber is added into the medium-sized hardwood chippings-wood shavings mixed material, and when the medium-sized hardwood chippings-wood shavings-wood fibers mixed material after glue mixing is paved, the glue-mixed wood fiber in the medium-sized hardwood chippings-wood shavings-wood fibers mixed material partially sinks into gaps of the softwood chip layer under the action of gravity, so that the bonding strength between the balanced bottom layer and the mixed strengthening layer can be improved; the wood fiber is added into the small hardwood chips, and when the wood fiber is paved, the glue-mixed wood fiber in the glue-mixed small hardwood chips-wood fiber mixture partially sinks into the gaps of the mixed strengthening layer under the action of gravity, so that the bonding strength between the decorative layer and the mixed strengthening layer can be improved.

Preferably, in step 8, the ratio between the molding time and the thickness of the composite profile is 80 to 120 s/mm.

In conclusion, according to the composite section and the manufacturing method thereof, the problem of application of the end waste of the solid wood floor is solved, and meanwhile, the composite section has the advantages of simple product structure, relatively good product performance, relatively high added value and suitability for mass production.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without inventive exercise.

Fig. 1 is a schematic structural view of a composite profile according to an embodiment of the present invention.

Reference numerals of the above figures: 100-decorative layer, 200-mixed strength layer, 300-balance bottom layer.

Detailed Description

In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.