阅读说明：本技术 一种轻质纤维表层可饰面定向结构板生产工艺 (Production process of light fiber surface layer veneerable directional structural slab ) 是由 滕广学 王永锋 赵洪亮 李安华 王鹏 刘栋梁 孙德玉 汪东会 于 2021-09-07 设计创作，主要内容包括：本发明公开了一种轻质纤维表层可饰面定向结构板生产工艺,刨花料备料,将刨花料加入计量料仓,通过计量称称重后加入到刨花料铺料机,纤维料备料,将纤维料加入计量料仓,通过计量称称重后加入到纤维料铺料机,通过铺料机进行分层铺料,刨花料和纤维料均匀铺装成板坯,板坯层数为三层,最下层为纤维料,中层为刨花料,最上层为纤维料,所述铺料厚度为成品厚度的2.5-3倍。本发明的有益效果是：通过纤维层与刨花层直接压合,可以增加纤维层与刨花层之间的连接强度,并且通过直接压合可以减少刨花板的砂光环节,减少人工,减少成本投入,通过纤维层与刨花层的直接压合可以通过纤维层对刨花层进行覆盖保护,可以避免板材裁切时发生崩边的现象。(The invention discloses a production process of a light fiber surface layer veneer-faced directional structural slab, which comprises the steps of preparing wood shaving materials, adding the wood shaving materials into a metering bin, weighing the wood shaving materials by a metering scale, adding the wood shaving materials into a wood shaving material spreading machine, preparing the fiber materials, adding the fiber materials into the metering bin, weighing the fiber materials by the metering scale, adding the fiber materials into the fiber material spreading machine, and spreading the fiber materials in a layering manner by the spreading machine, wherein the wood shaving materials and the fiber materials are uniformly spread into a slab, the slab has three layers, the lowest layer is the fiber materials, the middle layer is the wood shaving materials, the uppermost layer is the fiber materials, and the thickness of the spreading materials is 2.5-3 times of the thickness of a finished product. The invention has the beneficial effects that: through the direct pressfitting of fibrous layer and wood shavings layer, can increase the joint strength between fibrous layer and the wood shavings layer to can reduce the sand light link of shaving board through direct pressfitting, reduce the manual work, reduce the cost and put into, can cover the protection through the fibrous layer through the direct pressfitting on fibrous layer and wood shavings layer, take place the phenomenon that collapses the limit when can avoiding panel to cut.)

1. A production process of a light fiber surface layer facing directional structural slab is characterized by comprising the following processing steps:

s1, preparing wood shaving materials, namely adding the wood shaving materials into a measuring bin, weighing the wood shaving materials by a measuring scale, and adding the wood shaving materials into a wood shaving material spreading machine;

s2, preparing the fiber material, namely adding the fiber material into a metering bin, weighing the fiber material by a metering scale, and adding the fiber material into a fiber material spreading machine;

s3, spreading materials in layers by a spreader, uniformly spreading the shaving materials and the fiber materials into a plate blank, wherein the plate blank has three layers, the lowest layer is the fiber material, the middle layer is the shaving material, the uppermost layer is the fiber material, and the thickness of the spreading materials is 2.5-3 times of the thickness of a finished product;

s4, conveying the paved plate blank into a pre-pressing system through a conveyer, and performing primary compression molding on the plate blank through the pre-pressing system;

s5, the preliminarily formed plate blank enters a hot pressing system after moisture detection, the hot pressing system presses the plate blank into a required thickness, and the hot pressing system heats the rubber material in the plate blank to accelerate the reaction and solidification of the rubber material;

s6, allowing the plate to pass through a hot pressing system and enter a post-processing system, cutting the edge of the hot-pressed rough plate by using a diagonal saw and a trimming saw, and curing the plate after cutting;

s7, conveying the cured semi-finished plate blank into a sanding system through a conveying device, and sanding and polishing the upper and lower fiber layers of the plate by a sander;

and s8, directly pasting melamine impregnated paper or spraying paint on the surface of the qualified finished board.

2. A process for the production of a faceable, oriented strand board with a lightweight fiber skin as set forth in claim 1, wherein the preparation of shaving stock comprises the steps of:

removing the surface of the log by a log puller and a bark peeler;

collecting the wood with the surface removed, slicing the wood into long wood, slicing the long wood, and screening the surface layer material and the core layer material of the sliced wood through a screen;

conveying the screened wood shavings into a drying device through conveying equipment;

sorting the dried qualified sliced materials by a sorting system to obtain surface layer shaving materials and core layer shaving materials;

the sorted wood shaving materials enter an intelligent glue applying system through a scraper conveyor, and dried wood shavings are mixed with liquid glue;

and uniformly mixing the glue by a continuous glue mixer to obtain the qualified glue-applying shaving material.

3. A process for the production of a faceable, oriented strand board with a lightweight fiber skin as set forth in claim 1, wherein the fiber stock preparation comprises the steps of:

the fine wood branch raw material is chipped and broken into wood chips, and impurities such as sand, stone and the like are removed in a washing, magnetic absorption and screening mode;

placing the washed wood chips in a stock ground for 1-2 days for curing, so that the water in the wood chips is uniformly distributed;

after the raised wood chips are screened by a sieve, conveying the wood chips to storage equipment by a belt;

conveying the wood chips from the storage equipment to the cooking cylinder through a conveyer;

the wood chips enter a cooking cylinder, fibers in the wood chips are softened through high-temperature cooking at 120-150 ℃, then the wood chips enter a defibrator through a screw conveyor, and the wood chips are ground into fine fibers through the defibrator;

conveying the fine fibers to a drying pipeline through a hot grinding machine guniting pipe, wherein a glue spraying nozzle is arranged on the guniting pipe, and spraying qualified glue into the pipeline through the glue spraying nozzle to mix the glue with the fibers and then enter the drying pipeline;

and finally, the fiber after being dried through the drying pipeline enters a drying cyclone, the fiber is separated from hot air and then enters a winnowing machine, and the winnowing machine is used for separating out heavy particles such as fine sand and the like in the fiber to obtain the dried qualified fiber material.

4. The process for producing the directional structural slab with the light fiber surface layer capable of being veneered according to claim 2, wherein the processed shavings have an initial moisture content of 40-60% and are dried until the moisture content of the shavings meeting the process requirements is 9-15%.

5. The process for producing the directional structural slab with the light fiber surface layer capable of being veneered according to claim 1, wherein the qualified surface layer material and the qualified core layer material respectively enter an upper surface layer metering bin and a lower surface layer metering bin, the qualified core layer metering bin is weighed by a metering scale and then respectively enters a paving surface layer wood shaving paving head and a core layer wood shaving paving head for paving in sequence.

6. The process for producing the directional structural board with the surface layer capable of being decorated by the light fiber as claimed in claim 1, wherein the adhesive is urea formaldehyde resin adhesive, and the application amount is 8-12%.

7. The process for producing the directional structural board with the surface layer capable of being decorated by the light fiber as claimed in claim 1, wherein the curing time of the rough board is 2-3 days.

Technical Field

The invention relates to the technical field of plate processing, in particular to a production process of a light fiber surface layer veneered directional structural plate.

Background

At present, the decorative board used for being used as an indoor wall surface in home furnishing or building decoration on the market is generally a common structural board and a composite veneer gluing board, the technology of the board is complex, namely, a hot-pressing finished shaving board is firstly carried out, the finished shaving board is firstly sanded, then, the upper surface and the lower surface of the shaving board are glued and then pasted with a layer of hot-pressed fiber finished board, then, sanding is carried out again after hot pressing again, finally, facial tissue gluing is carried out, the manufacturing of the composite board is completed, the technology of the existing veneer gluing board on the market is complex and lagged behind, sanding and hot pressing are carried out for a plurality of times on the process, the cost of manpower and energy is too high, and the surface binding force is low and easy to crack and peel after the shaving board and the density board are pressed.

Disclosure of Invention

The invention aims to provide a production process of a light fiber surface layer facing directional structural board, which aims to overcome the defects of the prior art in the background art. Not only reduce artifical power consumption cost, solved the problem that fibre face and wood shavings face cracked and drop moreover, solve the shaving board and saw cut when collapsing limit scheduling problem to make the laminated paper have advantages such as better cohesion and face sculpture.

The invention discloses a production process of a light fiber surface layer veneered directional structural slab, which comprises the following processing steps:

step 1, preparing wood shaving materials, namely adding the wood shaving materials into a metering bin, weighing the wood shaving materials by a metering scale, and adding the wood shaving materials into a wood shaving material spreading machine;

step 2, preparing fiber materials, namely adding the fiber materials into a metering bin, weighing the fiber materials by a metering scale, and adding the fiber materials into a fiber material spreading machine;

step 3, performing layered paving by using a paving machine, uniformly paving the shaving material and the fiber material into a plate blank, wherein the plate blank has three layers, the lowest layer is the fiber material, the middle layer is the shaving material, the uppermost layer is the fiber material, and the paving thickness is 2.5-3 times of the thickness of a finished product;

conveying the laid plate blank into a pre-pressing system through a conveyer, and performing preliminary press forming on the plate blank through the pre-pressing system;

step 5, the preliminarily formed plate blank enters a hot pressing system after moisture detection, the hot pressing system presses the plate blank into a required thickness, and the hot pressing system heats the rubber material in the plate blank to accelerate the reaction and solidification of the rubber material;

step 6, the plate enters a post-treatment system after passing through a hot pressing system, the hot-pressed rough plate is subjected to edge cutting processing through a diagonal saw and an edge trimming saw, and the plate is cured after cutting is finished;

step 7, conveying the cured semi-finished plate blanks into a sanding system through a conveying device, and sanding and polishing the upper fiber layer and the lower fiber layer of the plate through a sanding machine;

and 8, directly pasting melamine impregnated paper or spraying paint on the surface of the qualified finished board.

Preferably, the preparation of the wood shaving material comprises the following steps:

removing the surface of the log by a log puller and a bark peeler;

collecting the wood with the surface removed, slicing the wood into long wood, slicing the long wood, and screening the surface layer material and the core layer material of the sliced wood through a screen;

conveying the screened wood shavings into a drying device through conveying equipment;

sorting the dried qualified sliced materials by a sorting system to obtain surface layer shaving materials and core layer shaving materials;

the sorted wood shaving materials enter an intelligent glue applying system through a scraper conveyor, and dried wood shavings are mixed with liquid glue;

and uniformly mixing the glue by a continuous glue mixer to obtain the qualified glue-applying shaving material.

Preferably, the preparation of the fiber material comprises the following steps:

the fine wood branch raw material is chipped and broken into wood chips, and impurities such as sand, stone and the like are removed in a washing, magnetic absorption and screening mode;

placing the washed wood chips in a stock ground for 1-2 days for curing, so that the water in the wood chips is uniformly distributed;

after the raised wood chips are screened by a sieve, conveying the wood chips to storage equipment by a belt;

conveying the wood chips from the storage equipment to the cooking cylinder through a conveyer;

the wood chips enter a cooking cylinder, fibers in the wood chips are softened through high-temperature cooking at 120-150 ℃, then the wood chips enter a defibrator through a screw conveyor, and the wood chips are ground into fine fibers through the defibrator;

conveying the fine fibers to a drying pipeline through a hot grinding machine guniting pipe, wherein a glue spraying nozzle is arranged on the guniting pipe, and spraying qualified glue into the pipeline through the glue spraying nozzle to mix the glue with the fibers and then enter the drying pipeline;

and finally, the fiber after being dried through the drying pipeline enters a drying cyclone, the fiber is separated from hot air and then enters a winnowing machine, and the winnowing machine is used for separating out heavy particles such as fine sand and the like in the fiber to obtain the dried qualified fiber material.

Preferably, the processed shaving material has an initial water content of 40-60%, and the water content of the shavings which are dried to meet the process requirements is 9-15%.

Preferably, the qualified surface layer material and the qualified core layer material respectively enter an upper surface layer metering bin and a lower surface layer metering bin, and the core layer metering bins are respectively weighed by a metering scale and then respectively enter a paving surface layer wood shaving paving head and a core layer wood shaving paving head for paving in sequence.

Preferably, the adhesive is urea-formaldehyde resin adhesive, and the glue application amount is 8-12%.

Preferably, the curing time of the rough boards is 2-3 days.

The invention has the beneficial effects that:

1. through the direct pressfitting of fibrous layer and wood shavings layer, can increase the joint strength between fibrous layer and the wood shavings layer to can reduce the sand light link of shaving board through direct pressfitting, reduce the manual work, reduce the cost and drop into.

2. The wood shaving layer can be covered and protected through the fiber layer by direct pressing of the fiber layer and the wood shaving layer, and the phenomenon of edge breakage when the plate is cut can be avoided.

Drawings

FIG. 1 is a schematic view of the overall process of the present invention.

Detailed Description

The following detailed description of embodiments of the invention refers to the accompanying drawings.

The invention provides a production process of a light fiber surface layer veneered directional structural slab, which comprises the following steps:

step 1, preparing wood shaving materials, namely adding the wood shaving materials into a metering bin, weighing the wood shaving materials by a metering scale, adding the wood shaving materials into a wood shaving material spreading machine, adding the prepared wood shaving materials into the metering bin, metering and conveying the wood shaving materials into the wood shaving material spreading machine by the metering bin, and spreading the wood shaving material spreading machine;

step 2, preparing fiber materials, namely adding the fiber materials into a metering bin, weighing the fiber materials by a weighing scale, adding the fiber materials into a fiber material spreading machine, adding the prepared fiber materials into the metering bin, metering and conveying the fiber materials into a shaving material spreading machine by the metering bin, and spreading the fiber materials by the fiber material spreading machine;

step 3, laying materials in layers by a laying machine, uniformly laying wood shavings and fiber materials into a plate blank, wherein the plate blank comprises three layers, the lowest layer is the fiber material, the middle layer is the wood shavings, the uppermost layer is the fiber material, the thickness of the laying material is 2.5-3 times of the thickness of a finished product, the fiber material of the lower layer is laid firstly, the wood shavings of the middle layer are laid on the fiber material of the lower layer after the fiber material of the lower layer is laid, the fiber material of the upper layer is laid on the wood shavings of the middle layer after the wood shavings of the middle layer are laid, the plate blank raw materials of the three layers are laid together, the thickness of the plate blank laid by 2.5-3 times of the thickness of the plate is determined by controlling the thickness of the laying material of a metering bin, the finished product thickness of the plate is controlled, and the plate blank raw materials of the three layers are laid together, so that the fiber layer and the wood shavings layer can be in better contact, the strength of the finished plate can be increased, and the cracking risk can be reduced;

conveying the laid plate blank into a prepressing system through a conveyer, performing preliminary press forming on the plate blank through the prepressing system, prepressing the laid plate blank through the prepressing system, wherein the prepressing is normal-temperature prepressing, the temperature is generally 20-40 ℃, a set of heating system is arranged in the prepressing machine, the heat energy source is the waste heat collection and heat supply of hot press equipment, the plate blank is given a certain temperature through the prepressing machine heating system, the subsequent hot press heating and internal material heat transfer efficiency are improved, the prepressing time is 10-35S, the hot press hot pressing time can be reduced through the prepressing heating system, the water content of the plate blank can be finely adjusted by controlling the prepressing heating temperature, and the plate blank achieves the best hot pressing effect;

step 5, the preliminarily formed plate blank enters a hot pressing system after moisture detection, the hot pressing system presses the plate blank into a required thickness, the hot pressing system heats the rubber material in the plate blank to accelerate the reaction and solidification of the rubber material, the hot pressing temperature is 200-220 ℃, and the plate blank is hot pressed into a blank board with a customized size according to the size of a customized thickness gauge after hot pressing;

and 6, making the plate blank into a rough plate through a hot pressing system, entering a post-treatment system, cutting the edge of the rough plate subjected to hot pressing through a diagonal saw and a trimming saw, and curing the plate after cutting. The board surface of the fiber material can prevent the problem of edge rising and burr generation when the rough board is cut, the problem of edge rising of the shaving board layer can be well pressed through the fiber material layer, the glue in the board is further reacted and solidified through maintenance, the moisture content in the rough board and the humidity in the atmosphere can be balanced in the period, the bonding strength in the rough board is increased, and the bending deformation of the board due to the change of the moisture content is reduced to the maximum extent;

and 7, conveying the cured semi-finished rough board into a sanding system through a conveying device, and sanding and polishing the upper and lower fiber layers of the rough board through a sanding machine. After the curing is finished, the board is sanded and leveled, the subsequent processing is convenient, the fiber material layer is beneficial to sanding treatment, and the problems of pinholes, peeling and the like can be reduced;

and 8, directly pasting melamine impregnated paper or spraying paint on the surface of the qualified finished board. The finished board can be subsequently processed by paster spraying and painting.

Preferably, the preparation of the wood shaving material comprises the following steps:

the surface skin of the log is removed by a log puller and a bark peeler, and the wood is used for removing the surface skin in the processing of the shaving pieces to prevent surface skin impurities from influencing the quality of the board;

the wood with the surface removed enters long material slicing after being collected, the wood is sliced, the sliced wood shavings are screened for surface layer materials and core layer materials through a sieve, the raw wood is processed into proper shavings through the slicing of the long material, the processed shavings are screened, the complete shavings are screened out to be used as the surface layer materials of the shavings material plate, and the damaged shavings material is used as the core layer materials of the shavings material plate, so that the strength of the plate after the plate is processed can be ensured;

conveying the screened wood shavings into a drying device through conveying equipment, and drying the wood shavings to reach proper water content, so that the wood shavings are convenient to be subjected to subsequent glue mixing processing;

sorting the qualified dried sliced materials by a sorting system to be divided into surface layer shaving materials and core layer shaving materials, wherein part of the shaving materials can be damaged and reduced by a drying device, the intact shaving materials are used as the surface layer shaving materials and the damaged shaving materials are used as the core layer shaving materials in the next sorting, and the strength of the processed plates is ensured;

the sorted wood shaving materials enter an intelligent glue applying system through a scraper conveyor, the dried wood shavings are mixed with liquid glue, the sorted wood shaving materials are applied with glue separately, and the wood shaving materials are mixed with the liquid glue, so that subsequent laying and pressing are facilitated;

and uniformly mixing glue by a continuous glue mixer to obtain a qualified glue-applying shaving material, and processing the shaving material to finish paving.

Preferably, the preparation of the fiber material comprises the following steps:

thin wood branch raw materials are chipped and broken into wood chips, sundries such as sand stones, iron and the like are removed through washing, magnetic attraction and screening, the fiber materials use the thin branches as a principle, the toughness of the branch fibers is high, the branch fibers are convenient to separate and convenient to carry out hot grinding processing, the branches are sliced and convenient to carry out subsequent hot grinding, the entry of water can also be accelerated, the branches are washed to remove impurities in the wood branches, and the branches are soaked and infiltrated at the same time;

placing the washed wood chips in a stock ground for 1-2 days for curing, so that the moisture in the wood chips is uniformly distributed, and the moisture infiltrating the wood chips can increase the flexibility of wood fibers and prevent the fibers from being broken during hot grinding;

after the raised wood chips are screened by a screen, the wood chips are conveyed to storage equipment through a belt, raw materials with proper sizes are added into the storage equipment through screening, and hot grinding processing is waited;

conveying the wood chips from the storage equipment to the cooking cylinder through a conveyer;

the wood chips enter a cooking cylinder to soften fibers in the wood chips through high-temperature cooking at the temperature of 120-150 ℃, then enter a defibrator through a screw conveyor, grind the wood chips into fine fibers through the defibrator, accelerate the defibering through the cooking, and then grind and separate the fibers through the defibrator;

conveying the fine fibers to a drying pipeline through a hot grinding machine pulp spraying pipe, wherein a glue spraying nozzle is arranged on the pulp spraying pipe, spraying qualified glue into the pipeline through the glue spraying nozzle, mixing the glue with the fibers, then feeding the mixed glue into the drying pipeline, spraying the hot ground wet fibers with the glue, mixing the fibers and the glue in the pulp spraying pipe, and then conveying the fine fibers to the drying pipeline through the pulp spraying pipe for drying so as to reduce the moisture content in the fibers;

and finally, the fiber after being dried through the drying pipeline enters a drying cyclone, the fiber is separated from hot air and then enters a winnowing machine, the winnowing machine is used for separating out heavy particles such as fine sand and the like in the fiber to obtain a dried qualified fiber material, the fiber material is taken out through the winnowing machine, and sand and stones are separated through winnowing to obtain a clean fiber material.

Preferably, the initial water content of the processed shaving material is 40-60%, the shaving material is dried until the water content of the shaving material meeting the process requirement is 9-15%, the water content of the shaving material is controlled, the processing of the shaving material is facilitated, and the situation that the water content of a plate is too high or too low after subsequent plate forming is avoided.

Preferably, top layer measurement feed bin about qualified back top layer material and core layer material get into respectively, and core layer measurement feed bin gets into respectively after weighing through the weigher and paves in proper order in top layer wood shavings shop head and the core layer wood shavings shop head of mating formation, paves wood shavings material top layer material and core layer material layering, and the top layer material setting is at the skin, and the core layer material sets up at the inlayer, can guarantee the intensity of wood shavings flitch, and it is extravagant to reduce former material.

Preferably, the adhesive is urea-formaldehyde resin adhesive, the adhesive application amount is 8-12%, and the adhesive application amount is controlled to reduce the content of pollutants and ensure the strength.

Preferably, the curing time of the rough board is 2-3 days, the glue which is not completely cured can be continuously reacted through curing, the moisture content in the board and the humidity in the atmosphere tend to be balanced, the strength of the board is improved to the maximum extent, and the bending deformation of the board is reduced.

Parameter comparison data of ordinary structural slab and light fiber surface layer veneered directional structural slab

1. Parameters of common structural panel

Common structural panel performance parameters

Surface bonding strength of common structural panel

Sample number	Inner diameter of circular wall (mm)	Adhesive area (mm)2)	Load (N)	The result of the detection
					1	35.7	1000	1144	1.14
2	35.7	1000	1052	1.05
					3	35.7	1000	1021	1.05
4	35.7	1000	1082	1.08
					5	35.7	1000	1022	1.02
Mean value of	35.7	1000	1064.5	1.062

Core bonding strength of common structural panel

Sample number	Long (mm)	Width (mm)	Load (N)	The result of the detection
					1	48.5	48.44	955	0.42
2	48.44	48.52	929	0.40
					3	48.72	48.69	1003	0.42
4	48.59	48.67	956	0.40
					5	50.29	50.24	1084	0.43
Mean value of	48.908	48.912	985.4	0.414

Static bending strength of common structural slab

2. Light fiber surface layer facing oriented structural slab parameter

Light fiber surface facing oriented structure board performance parameters (the water absorption expansion rate is reduced, the board blank quality is improved, the density is 96.3 percent of the common structure, and the parameters are basically unchanged)

Surface bonding strength of light fiber surface layer veneering oriented structural slab (basically same as common structure)

The bonding strength of the core layer of the light fiber surface layer facing directional structure board (the bonding strength of the core layer is 1.499 times of that of the common structure)

Sample number	Long (mm)	Width (mm)	Load (N)	The result of the detection
					1	48.5	48.44	1509	0.601
2	48.44	48.52	1647	0.645
					3	48.72	48.69	1596	0.625
4	48.59	48.67	1387	0.546
					5	50.29	50.24	1745	0.686
Mean value of	48.908	48.912	1576.8	0.6206

Static bending strength of light fiber surface veneer directional structure board (static bending strength is 1.383 times of common structure)

The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions are considered to be within the protective scope of the present invention.