CN217168865U

CN217168865U - Sewing wood shaving sandwich composite board

Info

Publication number: CN217168865U
Application number: CN202121399444.9U
Authority: CN
Inventors: 张宇慧; 胡英成; 王立峰
Original assignee: Northeast Forestry University
Current assignee: Northeast Forestry University
Priority date: 2021-06-23
Filing date: 2021-06-23
Publication date: 2022-08-12
Anticipated expiration: 2031-06-23

Abstract

The utility model relates to a sewing wood shavings press from both sides core composite sheet, the plate body includes: the core body comprises an upper surface layer and a lower surface layer, and is characterized by also comprising fiber columns; the surface layer is formed by impregnating fibrilia cloth with glue, hot-pressing and curing; the surface layers are respectively glued on the front side and the back side of the core plate through adhesives; the fiber column is formed by sewing threads to the core body and the surface layer fiber cloth by improving a chain type sewing method, and dipping, hot-pressing and curing; the core body and the upper and lower fiber cloths are rectangular. The utility model discloses the beneficial effect who expresses is: compared with the existing common shaving board, the novel shaving board has the advantages of high mechanical strength, high creep resistance, long service life, high bearing capacity, capability of being manufactured into a large board, low cost and easiness in realization. Compared with the existing oriented strand board, the oriented strand board has more excellent decorative performance, can be used for manufacturing furniture, and can greatly increase the utilization rate of wood because the used wood shavings are common wood shavings.

Description

Sewing wood shaving sandwich composite board

Technical Field

The utility model relates to a shaving board technical field, concretely relates to sewing wood shavings press from both sides core composite sheet.

Background

Wood is one of four major raw materials (wood, steel, cement and plastic) accepted in the world, and compared with other mineral resource materials, wood is the only renewable biomass resource in the four major raw materials. However, China has abundant biomass resources, but the utilization rate is low, and a large amount of biomass energy is wasted. The production of particle boards is one of the effective methods for improving the utilization rate of biomass, especially forestry resources.

Along with the continuous improvement of people's standard of living, the requirement to the shaving board also improves thereupon, but current shaving board exists the intensity low, and creep resistance can't the characteristics such as poor, has shortened the life of shaving board, has increased the frequency that the user changed the shaving board, causes serious harm for user's economy. The existing high-strength oriented strand board has large wood shavings, rough surface and difficult decoration, and is difficult to be applied to the field of furniture, so the development of the application field and the manufacturing field of the strand board is limited.

The hemp fiber is a natural plant fiber, and can be processed into a hemp thread and woven into a linen due to the fiber length, so that the hemp fiber has good mechanical properties. The hemp fiber is mainly applied to the textile industry, and the high value-added utilization of the hemp fiber is still to be explored.

Disclosure of Invention

The utility model aims to improve the characteristics such as current shaving board existence intensity is low, creep resistance is poor, further carry out structural modification on current shaving board production technology basis. Thereby providing a sewing wood shaving sandwich composite board.

The utility model relates to a sewing wood shavings press from both sides core composite sheet, the package rubbing board body: the board body comprises a core body, an upper surface layer and a lower surface layer, and is characterized in that the core body also comprises a fiber column; the fiber cloth is fibrilia cloth. The wood shavings are common wood shavings, and the dimensions of the wood shavings are as follows: the wood shavings are 3 mm-25 mm long, 3mm-6mm wide and 0.1 mm-0.6 mm thick or thinner. The sewing thread is a hemp thread, the thickness of the sewing thread is 0.8-2 mm, and the used sewing thread is dipped.

Further stirring the wood shavings and the adhesive, paving the wood shavings and the upper and lower fiber cloths in a mold respectively, and prepressing and hot-pressing the mixture to prepare a preformed body, wherein the preformed body is rectangular, has the length of 190-340 mm, the width of 50-320 mm and the thickness of 7-20 mm; the density of the wood shaving sandwich composite material is 0.6-0.9 g/cm ³

And further placing the preformed body into a numerical control drilling machine tool, clamping the preformed body by using a clamp and realizing drilling with different intervals and different line distances, wherein the drilling angle is 90 degrees, the aperture size is 1.5-3.5 mm, the interval of the drilling is 5-30 mm, and the line distance of the drilling can be 10-40 mm.

And further sewing the preformed body with the holes by using sewing threads, wherein the sewing mode is an improved locking type sewing mode, a sewing thread impregnated with the adhesive is firstly penetrated on the preformed body, then a bottom thread impregnated with the adhesive is penetrated on the preformed body, and the upper surface and the lower surface of the sewn wood shaving sandwich composite material are coated with glue.

Further carrying out hot press forming on the sewn shaving sandwich composite material by a hot press method, and curing to obtain the sewn shaving sandwich composite board

The utility model has the advantages that: the utility model discloses simple structure improves ingeniously, improves traditional shaving board, adopts vertical type lattice structure, compares with current shaving board, has improved the mechanical properties and the creep resistance of ordinary shaving board. The application field of the hemp fiber is developed, and the utilization rate of the biomass material is improved.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a plan view of the present invention.

The figure is as follows: 1 wood shaving core plate, 2 fibrilia surface, 3 sewing threads, 4 fiber columns and 5 sewing wood shaving sandwich composite plate

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

As shown in fig. 1, the utility model relates to a sewing wood shaving sandwich composite board, which comprises a board body 5: the plate body comprises a core body, an upper surface layer and a lower surface layer 2, and is characterized in that the core body also comprises a fiber column 4; the surface layer 2 is made of jute fiber cloth (25S), and the fiber density is 1.5g/cm ³ (ii) a The adhesive belongs to urea-formaldehyde resin adhesive, the curing temperature is 100-150 ℃, and the curing agent is 20% ammonium chloride aqueous solution; the sewing thread 3 is a jute fiber thread and has the size of 1 mm; the wood shavings 1 are common wood shavings, and the wood shavings have the following sizes: the length is 18 mm-25 mm, the width is 3mm-6mm, and the thickness is 0.2 mm-0.6 mm.

Further measuring the water content of the wood shavings, and cutting jute fiber cloth with the size of 320mm long and 340mm wide. Weighing jute fiber cloth, and weighing wood shavings, solid rubber powder and curing agent respectively to obtain preform with density of 0.67g/cm ³ The thickness t is 13mm, the mass of the adhesive solid powder is 10% of the mass of the wood shavings, and the mass of the 20% ammonium chloride aqueous solution is 0.7% of the mass of the adhesive solid powder.

Further, the weighed solid rubber powder, the curing agent and water are stirred to obtain a urea-formaldehyde resin adhesive solution, and the adhesive solution and the wood shavings are uniformly mixed together under the action of a stirrer by an adhesive spraying method to form a mixture.

Further, the lower layer fiber cloth of the jute fiber, the mixture and the upper layer cloth of the jute fiber are respectively and uniformly paved in a mould, the mould is put into a prepress for prepressing with the pressure of 1.5MPa for 30s, the mould is demoulded and then put into a hot press, the thickness is determined according to the thickness, the hot pressing pressure is 10MPa, and the time is 6 min.

Further, the preform was cut into a specimen having a length a of 310mm and a width b of 50mm as shown in FIG. 2. Then placing the blank into a numerical control drilling machine to drill holes, wherein the row spacing of the drilled holes is S1-10 mm, the spacing of the drilled holes is S2-10 mm, the diameter of each hole is 2mm, and the angle is 90 degrees.

Further, the drilled test piece is sewn by an improved lock type sewing method through a jute fiber sewing thread with the thickness of 1mm, the thread needs to be dipped before sewing, and the glue is urea-formaldehyde resin adhesive. Gluing the upper surface and the lower surface again after sewing, wherein the gluing amount of the single surface is 20% of the mass of the solid glue powder used by the single surface and the mass of the single-surface fiber cloth, placing the test piece into a hot press for hot pressing after brushing, and placing a thickness gauge to ensure that the thickness of the test piece is unchanged before and after hot pressing, wherein the hot pressing temperature is 120 ℃, and the time is 3 min. After the test piece is solidified and formed, the jute fiber sewing wood shaving sandwich composite material can be obtained.

Claims

1. A sewing wood shaving sandwich composite board comprises a board body: the board body comprises a core body, an upper surface layer and a lower surface layer, and is characterized in that the core body also comprises a fiber column; the surface layer is respectively glued on the front surface and the back surface of the core plate through an adhesive; the fiber column is formed by sewing threads on the core body and the surface layer fiber cloth by improving a chain type sewing method, and dipping and curing; the core body and the upper and lower fiber cloths are rectangular, the length is 190-340 mm, the width is 50-320 mm, and the thickness is 7-20 mm.

2. The sewn wood shaving sandwich composite panel according to claim 1, wherein: the surface layer is formed by impregnating and curing fibrilia cloth.

3. The sewn wood shaving sandwich composite panel according to claim 1, wherein: the core body has a length of 3-25 mm, a width of 3-6 mm, and a thickness of 0.1-0.6 mm or less.

4. The sewn wood shaving sandwich composite panel according to claim 1, wherein: the sewing thread is a hemp thread, and the used sewing thread is gummed.

5. The sewn wood shaving sandwich composite panel according to claim 1, wherein: the density of the wood shaving sandwich composite material is 0.6-0.9 g/cm ³ 。

6. The sewn wood shaving sandwich composite panel according to claim 1, wherein: the space between the fiber columns is 5 mm-30 mm, and the line spacing of the fiber columns can be 10 mm-40 mm.

7. The sewn wood wool sandwich composite panel according to claim 1, wherein: the diameter of the fiber column is 3.5mm-1.5 mm.

8. A sewn wood shaving sandwich composite panel according to claim 1, 2 or 4, wherein: the thickness of the sewing thread is 0.8 mm-2 mm.