阅读说明：本技术 一种木纤维门扇及其制作工艺 (Wood fiber door leaf and manufacturing process thereof ) 是由 李纳 都军 马新元 李儒光 刘继忠 于 2021-06-24 设计创作，主要内容包括：本发明公开了一种木纤维门扇及其制作工艺,所述制作工艺包括以下步骤：1)按重量份称取针叶树木材、胶黏剂和防水剂；2)将针叶树木材切制成短切纤维,并经筛网过滤,且进行干燥；3)胶黏剂和防水剂与2)所得的干燥后的短切纤维混合,形成混合材料；4)将所述混合材料输送至双螺杆挤出机中剪切、挤压,并通过定型模水冷却成型,形成门板基材；5)将所述门板基材切割至预设尺寸；6)将切割后的门板基材填充至预设的LVL骨架中,且加压形成木纤维门扇。本发明具有制备工艺简单、步骤简约和广泛取材适用优点,同时有效解决了门体易腐烂,受潮变形的问题。(The invention discloses a wood fiber door leaf and a manufacturing process thereof, wherein the manufacturing process comprises the following steps: 1) weighing conifer wood, an adhesive and a waterproof agent according to parts by weight; 2) cutting conifer wood into short fibers, filtering by a screen mesh, and drying; 3) mixing the adhesive and the waterproof agent with the dried chopped fibers obtained in the step 2) to form a mixed material; 4) conveying the mixed material to a double-screw extruder for shearing and extruding, and performing water cooling forming through a shaping die to form a door panel base material; 5) cutting the door panel base material to a preset size; 6) and filling the cut door panel base material into a preset LVL framework, and pressurizing to form the wood fiber door leaf. The invention has the advantages of simple preparation process, simple steps, wide material availability and the like, and effectively solves the problems of easy decay and damp deformation of the door body.)

1. The manufacturing process of the wood fiber door leaf is characterized by comprising the following steps:

1) weighing conifer wood, an adhesive and a waterproof agent according to parts by weight;

2) cutting conifer wood into short fibers, filtering by a screen mesh, and drying;

3) mixing the adhesive and the waterproof agent with the dried chopped fibers obtained in the step 2) to form a mixed material;

4) conveying the mixed material to a double-screw extruder for shearing and extruding, and performing water cooling forming through a shaping die to form a door panel base material;

5) cutting the door panel base material to a preset size;

6) and filling the cut door panel base material into a preset LVL framework, and pressurizing to form the wood fiber door leaf.

2. The manufacturing process of the wood fiber door leaf according to claim 1, further comprising the steps of:

7) and (3) performing thickness fixing, carving and door leaf sanding on the door panel base material obtained in the step 5).

3. The manufacturing process of the wood fiber door leaf according to claim 1, further comprising: and then placing the door panel base material obtained in the step 4) in a press machine for film coating forming, or fixing UV glue on the bottom surface of the door panel base material in a double mode, and baking and forming in an ultraviolet lamp tube to obtain the door panel base material with the protective film layer.

4. The manufacturing process of the wood fiber door leaf according to claim 1, wherein the step 6) further comprises spraying the water-based adhesive and the waterproof agent on the surface of the door panel substrate.

5. The manufacturing process of the wood fiber door leaf according to claim 1, wherein the main machine rotating speed of the twin-screw extruder in the step 4) is 20-30 r/pm.

6. The manufacturing process of the wood fiber door leaf according to claim 3, wherein the conditions of the film coating forming are as follows: the film was laminated and molded for 90 seconds in a press apparatus at 190 ℃ under a pressure of 6 kg.

7. The manufacturing process of the wood fiber door leaf according to claim 3, wherein the specific conditions of the baking forming are as follows: baking in ultraviolet lamp at 500 deg.C for 1 min.

8. The manufacturing process of the wood fiber door leaf according to claim 4, wherein the aqueous adhesive is one of polyvinyl alcohol aqueous adhesive, ethylene acetate aqueous adhesive, acrylic aqueous adhesive, polyurethane aqueous adhesive and epoxy aqueous adhesive.

9. The manufacturing process of the wood fiber door leaf according to claim 3, wherein the coating film of the door panel base material is a veneer overlay, a PVC coating film or a PVE coating film.

10. A wood fiber door leaf, characterized by being obtained by the manufacturing process of any one of claims 1 to 9;

the door plate base material of the wood fiber door leaf comprises the following materials in percentage by weight:

86 percent of coniferous trees

5 percent of adhesive

4 percent of waterproofing agent.

Technical Field

The invention relates to the field of door plate processing, in particular to a wood fiber door leaf and a manufacturing process thereof.

Background

With the development of society, composite materials are widely applied in various industrial fields. However, most of the existing door plate base materials are density plates or solid wood, which are not environment-friendly, and the base materials are easy to rot, damp and deform, so that the use environment is limited; easy to be damaged by worms; moreover, the existing door panel base material has a complex process and is mostly operated manually; the later maintenance is complex, and the crack, the expansion and the deformation are easy.

CN111978754A discloses a production method of bamboo-wood fiber door plate, which adopts polyvinyl chloride resin, calcium carbonate and bamboo as raw materials and mixes, and the door plate base material is coated with a film or double-fixed UV glue to prepare the bamboo-wood fiber door plate, and the bamboo-wood fiber door plate has the characteristics of water resistance, moisture resistance, insect prevention, termite prevention, high environmental protection, no pollution, no public nuisance, recycling, no cracking, no expansion, no deformation, and no need of maintenance and curing. But the bamboo wood has regional limitation for obtaining raw materials compared with wood, the bamboo wood cannot be used as a door body material independently, and more working procedures and higher cost are realized in the composite processing process.

Therefore, a door body preparation process which is simple in preparation process, simple in steps, widely available in materials and applicable is urgently needed to solve the problems of easy decay and deformation caused by dampness.

Disclosure of Invention

The invention aims to solve the technical problem of providing a wood fiber door leaf and a manufacturing process thereof, wherein the manufacturing process comprises the following steps:

1) weighing conifer wood, an adhesive and a waterproof agent according to parts by weight;

2) cutting conifer wood into short fibers, filtering by a screen mesh, and drying;

3) mixing the adhesive and the waterproof agent with the dried chopped fibers obtained in the step 2) to form a mixed material;

4) conveying the mixed material to a double-screw extruder for shearing and extruding, and performing water cooling forming through a shaping die to form a door panel base material;

5) cutting the door panel base material to a preset size;

6) and filling the cut door panel base material into a preset LVL framework, and pressurizing to form the wood fiber door leaf.

As a further improvement of the embodiment of the present invention, the manufacturing process further includes the following steps:

7) and (3) performing thickness fixing, carving and door leaf sanding on the door panel base material obtained in the step 5).

As a further improvement of the embodiment of the present invention, the method further comprises: and then placing the door panel base material obtained in the step 4) in a press device for film-coating forming, or fixing UV glue on the bottom surface of the door panel base material in a double mode, and baking and forming in an ultraviolet lamp tube to obtain the door panel base material with the protective film layer.

As a further improvement of the embodiment of the present invention, step 6) further includes spraying an aqueous adhesive and a waterproof agent on the panel surface of the door panel substrate again.

As a further improvement of the embodiment of the invention, the main machine rotating speed of the twin-screw extruder in the step 4) is 20-30 r/pm.

As a further improvement of the embodiment of the present invention, the conditions of the film formation: the film was laminated and molded for 90 seconds in a press apparatus at 190 ℃ under a pressure of 6 kg.

As a further improvement of the embodiment of the present invention, the specific conditions of the baking forming are as follows: baking in ultraviolet lamp tube at 500 deg.C for 1 min.

As a further improvement of the embodiment of the present invention, the aqueous adhesive is one of a polyvinyl alcohol aqueous adhesive, an ethylene acetate aqueous adhesive, an acrylic aqueous adhesive, a polyurethane aqueous adhesive, and an epoxy aqueous adhesive.

As a further improvement of the embodiment of the present invention, a veneer overlay, a PVC film or a PVE film is used as the door panel base material film.

On the other hand, the invention discloses a wood fiber door leaf which is obtained by the manufacturing process.

The door plate base material of the wood fiber door leaf comprises the following materials in percentage by weight:

86 percent of coniferous trees

5 percent of adhesive

4 percent of waterproofing agent.

The invention has the following beneficial effects:

1. the process steps of the wood fiber door plate disclosed by the invention are simple and easy to implement, the preparation process is greatly reduced, and the preparation cost is reduced;

2. the wood fiber door plate disclosed by the invention is easily available in material, can be widely applied, and can effectively solve the problems of easy decay, damp deformation;

3. the wood fiber board is formed by heating, pressurizing and gluing the wood fibers of needle-leaved trees which can be continuously produced. The composite material has the advantages of low water absorption expansion rate, low density, high compressive strength, sound and heat insulation, environmental protection, long service cycle and the like.

Detailed Description

The present invention will be described in detail with reference to examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that it would be apparent to those skilled in the art that several modifications and improvements can be made without departing from the inventive concept. All falling within the scope of the present invention.

The invention aims to solve the technical problem of providing a wood fiber door leaf and a manufacturing process thereof, wherein the manufacturing process comprises the following steps:

1) weighing conifer wood, an adhesive and a waterproof agent according to parts by weight; preferably, the door panel base material of the wood fiber door leaf is composed of the following materials by weight percent:

86 percent of coniferous trees

5 percent of adhesive

4 percent of waterproofing agent.

2) Cutting conifer wood into short fibers, filtering by a screen mesh, and drying;

3) mixing the adhesive and the waterproof agent with the dried chopped fibers obtained in the step 2) to form a mixed material;

4) conveying the mixed material to a double-screw extruder for shearing and extruding, and performing water cooling forming through a shaping die to form a door panel base material;

5) cutting the door panel base material to a preset size;

6) filling the cut door panel base material into a preset LVL framework, and pressurizing to form a wood fiber door leaf; the pressurizing time is 2.5min, the pressurizing temperature is kept at 30 ℃, and the pressure is 8 MPa.

Further, the manufacturing process also comprises the following steps:

7) and (3) performing thickness fixing, carving and door leaf sanding on the door panel base material obtained in the step 5).

In other optional embodiments, the door panel substrate in step 4) is placed in a press device for film-coating molding, or UV glue is doubly fixed on the bottom surface of the door panel substrate, and is baked and molded in an ultraviolet lamp tube, so as to obtain the door panel substrate with the protective film layer.

In other alternative embodiments, step 6) is followed by spraying an aqueous adhesive and a water repellent again on the panel surface of the door panel substrate.

Preferably, the main machine rotating speed of the twin-screw extruder in the step 4) is 20-30 r/pm.

Wherein, the conditions of the film forming are as follows: the film was laminated and molded for 90 seconds in a press apparatus at 190 ℃ under a pressure of 6 kg.

The specific conditions of the baking forming are as follows: baking in ultraviolet lamp at 500 deg.C for 1 min.

The selected aqueous adhesive is one of polyvinyl alcohol aqueous adhesive, ethylene acetate aqueous adhesive, acrylic acid aqueous adhesive, polyurethane aqueous adhesive and epoxy aqueous adhesive.

Preferably, the door panel substrate coating adopts a veneer overlay, a PVC coating or a PVE coating.

On the other hand, the invention discloses a wood fiber door leaf which is obtained by the manufacturing process.

The door plate base material of the wood fiber door leaf comprises the following materials in percentage by weight:

86 percent of coniferous trees

5 percent of adhesive

4 percent of waterproofing agent.

Preferably, the adhesive is MDI glue and the waterproofing agent is paraffin.

When the size of the door leaf is 4.75mm, the coating amount of the adhesive is 10g/cm²The pressurizing time is 2.5min, the pressurizing temperature is kept at 30 ℃, and the pressure is 8 MPa.

The prepared wood fiber board is subjected to the following test items to obtain the following detection results:

the invention has the following beneficial effects:

1. the process steps of the wood fiber door plate disclosed by the invention are simple and easy to implement, the preparation process is greatly reduced, and the preparation cost is reduced;

2. the wood fiber door plate disclosed by the invention is easily available in material, can be widely applied, and can effectively solve the problems of easy decay, damp deformation;

3. the wood fiber board is formed by heating, pressurizing and gluing the wood fibers of needle-leaved trees which can be continuously produced. The composite material has the advantages of low water absorption expansion rate, low density, high compressive strength, sound and heat insulation, environmental protection, long service cycle and the like.

It should be noted that, the LVL referred to in the present invention is a dyed Vener Chamber, which is a board obtained by rotary cutting or slicing a raw wood into a single board, drying and gluing the single board, assembling the single board according to the grain or most of the grain, and then performing hot press gluing.

The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes and modifications may be made by those skilled in the art within the scope of the appended claims without departing from the spirit of the invention.