CN101850573A - A kind of manufacturing method of sliced thin bamboo decoration material - Google Patents

Abstract

The invention relates to an improved manufacturing method of sliced thin bamboo decorative material. The problems it needs to solve are: first, using short bamboo slices to make thin bamboo decorative materials, breaking the limitation of the bamboo sheet width limited by the length of bamboo slices; second, changing the water injection process to make the injection faster and more uniform. The steps of the present invention are 1) preparation of short bamboo slices; 2) manufacture of short bamboo boards; 3) lengthening of short bamboo boards-shaping: tenoning, sizing, and lengthening of short bamboo boards; 4) humidification of long bamboo boards : Put it into the cold water pool for impregnation under normal pressure, impregnate the radial bamboo boards for 10-20 days, and impregnate the stringed bamboo boards for 15-25 days; after impregnating the long bamboo boards, add water under pressure to make the long bamboo boards have a moisture content of 25 % or more; 5) Bamboo lumber manufacturing: Air-dry the humidified long bamboo boards to a moisture content of 30-45%, apply a moisture-curing adhesive between several layers, and carry out cold-press bonding; after depressurization, naturally age ≥ 12h; 6) Bamboo The square material is softened; 7) sliced.

Description

A kind of manufacturing method of sliced thin bamboo decoration material

technical field

The invention relates to the field of bamboo processing, in particular to an improved method for manufacturing thin sliced bamboo decorative materials.

Background technique

At present, in the manufacture of sliced thin bamboo and thin bamboo decorative materials, the bamboo used is generally taken according to the length of the bamboo board, which is in the range of 2000mm to 3200mm. When manufacturing rectangular bamboo slices, the thickness-determined material is processed based on the small head of the bamboo blank, which has the problems of large amount of planing and serious waste of bamboo resources. Disclosed in Chinese patent document CN1227102C patent is " a kind of sliced thin bamboo and production method thereof ", what it adopted is exactly the manufacture method of strip bamboo chip, because of the large amount of bamboo planing, resource utilization rate is not high; On the other hand, During the manufacturing process of bamboo squares, the surface of bamboo boards should be sanded or shaped in advance, and then immersed in a cold water pool for dipping treatment, so that the storage time can be used to increase the moisture of bamboo boards. Take it out and pressurize and humidify it, so as to realize the rapid and uniform water injection of the bamboo board, and the cutting quality is good; finally, the softening method of high-frequency heating can also be used in the softening treatment of bamboo squares, which can greatly improve the production efficiency. This production process is suitable for the production of side-jointed and flat-pressed carbonized, natural-colored or combined various sliced thin bamboo decorative materials.

Contents of the invention

The problems to be solved in the present invention are: one is to use short bamboo slices to make thin bamboo decorative materials, breaking the limitation that the width of the bamboo plate is limited by the length of the bamboo slices; the other is to change the water injection process to make the injection faster and more uniform.

The manufacture method of sliced thin decorative material of the present invention is characterized in that following steps:

1) Preparation of short bamboo slices: take short bamboo sections with a length of 0.6-1.3m (preferably 0.9-1.3m), saw them longitudinally or cut them into thick bamboo slices, plan their four sides (so that the width and thickness of bamboo slices The tolerance is controlled within the range of ±0.1mm), after steaming, drying or carbonization, finely planed natural color or carbonized short bamboo pieces;

2) Manufacture of short bamboo boards: glue the natural color or carbonized short bamboo slices, and make them into chord or radial short bamboo boards after flat pressing or side pressing;

3) Lengthening of short bamboo boards-shaping: the short bamboo boards are tenoned, glued, and lengthened to the required length at one or both ends of the short bamboo boards, and the surface of the long bamboo boards is planed Shaping treatment; the mortise can be square-toothed, preferably zigzag, with a tooth pitch of 6-12mm, a tooth width of 0.9-1.8mm, and a tooth length of 10-15mm.

4) Humidification of long bamboo boards: Put the long bamboo boards into the cold water pool for atmospheric pressure impregnation, in which the laterally pressed radial bamboo boards are impregnated for 10-20 days, and the horizontally pressed chordwise bamboo boards are impregnated for 15-25 days After impregnation, the long bamboo board is pressurized and water injected, the pressure is 0.3~0.8MPa, and the time is 6~24h, so that the moisture content inside and outside the long bamboo board is uniform, and the moisture content reaches more than 35%, and the long bamboo board is humidified;

5) Manufacture of bamboo squares: Air-dry the humidified long bamboo boards until the moisture content on the surface of the bamboo boards is 30~45%, apply a commercially available wet-curable adhesive between several layers of humidified long bamboo boards, and carry out cold pressing Glue to make wet bamboo lumber; natural aging ≥ 12h after pressure relief; cold pressing pressure is 1.2~3.0MPa, time is 1.5~3.0h;

6) Bamboo lumber softening: Step 5) Bamboo lumber is softened by hot water or high-frequency heating; when hot water is softened, the heating rate is controlled at 1.5~2°C/h, the temperature is 35~70°C, and the softening time is 24~ 72h; when softening by high-frequency heating, the heating rate is controlled at 0.5~2°C/min, the temperature is controlled at 35~70°C, and the softening time is 0.5~2h;

7) Slicing to obtain thin bamboo decoration materials.

Using short bamboo slices to make long slices of sliced thin bamboo can greatly reduce the amount of bamboo planing and improve the utilization rate of bamboo resources. This is the first improvement of the present invention; in addition, after the bamboo plate is manufactured, the surface is sanded Or after the plastic treatment, pre-soak into the cold water pool for soaking treatment, so that the storage time can be used to increase the moisture of the bamboo board, and then take it out for pressurized and humidified treatment when the bamboo square is to be manufactured, so as to realize the bamboo board. For the purpose of uniform and rapid water injection, the cutting quality is good (the thickness of sliced thin bamboo is 0.10~2.00mm), which is another improvement of the present invention; finally, high-frequency heating can also be used in the softening treatment of bamboo squares The softening method can realize the rapid softening of bamboo squares, protect the environment, and greatly improve the production efficiency.

Sliced thin bamboo slices can be directly used as products; they can also be made into large-format sliced thin bamboo through subsequent splicing or splicing; they can also be coated with adhesive layers and craft layers, where the craft layers can be flexible paper, cloth, etc. Material, or other boards, coated with technical layer has the functions of preventing cracking of sliced thin bamboo, increasing strength and facilitating processing.

Specific implementation method

Example 1.

The production method of this example sliced thin bamboo is:

1) Preparation of short bamboo slices: take 0.9m-long short bamboo sections, cut them into pieces, plan them on four sides, cook them, dry them, and finely plan them into natural-color short bamboo slices with a width and thickness of 17.5±0.1mm and 6.0±0.1mm;

2) Manufacture of short bamboo boards: glue the short bamboo pieces of natural color, and make radial short bamboo boards with a width of 430 mm after side pressing;

3) Lengthening of short bamboo boards-reshaping: The short bamboo boards made are tenoned at one or both ends, the tenon tooth spacing is 8mm, the tooth length is 10mm, coated with thermosetting melamine modified urea-formaldehyde resin, and lengthened Up to 2700m length, surface shaping treatment for long bamboo boards;

4) Humidification of long bamboo boards: Put the long bamboo boards into a cold water pool for atmospheric pressure impregnation, in which the radial bamboo boards are impregnated for 20 days, and the impregnated long bamboo boards are then pressurized and injected with water at a pressure of 0.3 MPa for a time of 24h, make its moisture content reach 50%, get humidified long bamboo board;

5) Manufacture of bamboo squares: air-dry the surface of the humidified long bamboo boards to a moisture content of 30%, and apply polyurethane wet-curing adhesive (produced by Taier Chemical Co., Ltd.) between 12 to 15 layers of humidified long bamboo boards. It is a reddish-brown viscous liquid, solid content > 75%, viscosity 500mPa s, applicable period is 3-6 months), after lamination, cold pressing with a pressure of 1.5MPa for 3 hours to obtain wet bamboo squares, which will naturally Chen put 12h;

6) Bamboo lumber softening: Step 5) Bamboo lumber is softened with hot water, the heating rate is controlled at 1.5°C/h, the temperature is 55°C, and the softening time is 72h;

7) Slicing, according to the included angle of 30° between the blade of the slicing tool and the bamboo fiber direction, to obtain a thin bamboo decorative material with a thickness of 0.3 mm.

Example 2.

The production method of sliced thin bamboo in this example is different from Example 1: the 1.3m-long fine planed carbonized short bamboo chips are glued and flat pressed to make short bamboo boards in the chord direction, and the long bamboo boards are connected by short bamboo boards. Methods to make 3200×430×17.5mm carbonized long bamboo boards; soak the bamboo boards for 15 days, then pressurize and inject water into the impregnated long bamboo boards. About 45%; the bamboo is softened by high frequency, the heating rate is controlled at 1.0°C/min, the temperature is 70°C, and the softening time is 90min; Obtaining length is 3200mm, and width is 430mm, and the thickness is the carbonization sliced thin bamboo product of 0.3mm. The rest are the same as example 1.

Example 3.

The production method of sliced thin bamboo in this example is different from Example 1 in that: the short bamboo boards are side-pressed with 0.6m long and short bamboo pieces, and the bamboo boards are made into a natural color of 3600×430×17.5mm by connecting short bamboo boards to lengths. Combination of radial bamboo boards and carbonization; radial bamboo boards impregnated for 20 days; impregnated long bamboo boards were then pressurized and watered at a pressure of 0.8 MPa for 12 hours, so that the moisture content of the bamboo boards reached about 80%; glue After the bamboo is synthesized, it is boiled and softened. The heating rate is controlled at 2°C/min, the temperature is 35°C, and the softening time is 72h; the angle between the blade of the planer and the bamboo fiber direction is 30°, and the length is 3600mm. Sliced thin bamboo products with a width of 430mm and a thickness of 1.0mm in natural color and carbonization. The rest are the same as example 1.

Claims (3)

1. the manufacture method of a sliced bamboo decoration material is characterized in that as follows:

1) lack the bamboo chip preparation: get the short bamboo section of 0.6 ~ 1.3m length, vertically saw or cut open into thick bamboo sheet, its four sides of planing, through boiling, drying or charing, adjustable cast iron planes becomes true qualities or the short bamboo chip of charing;

2) lack the bamboo board manufacturing: true qualities or the short bamboo chip of charing are carried out gluing, after concora crush or side pressure, make tangential or radially short bamboo board respectively;

3) lack bamboo clappers spreading-shaping: the short bamboo board that will make, carry out mortise, applying glue, spreading to Len req at an end or the two ends of its plate length direction, long bamboo board is carried out surface planing shaping handle;

4) long bamboo board humidification: will long bamboo board put into and carry out the normal pressure dipping in the water cooling pond, wherein through the radially bamboo clappers dipping of side pressure 10 ~ 20 days, through the tangential bamboo clappers dipping of concora crush 15 ~ 25 days; Long bamboo board behind dipping is pressure water injection again, and pressure is 0.3 ~ 0.8MPa, and the time is 6 ~ 24h, makes the inside and outside moisture content of long bamboo board even, and moisture content reaches more than 25%, gets the long bamboo board of humidification;

5) the bamboo square bar is made: the long bamboo board of humidification is air-dry, to bamboo clappers surface moisture content 30 ~ 45%, apply wet solid type adhesive between the long bamboo board of several layers humidification, and the gummed of colding pressing is made wet bamboo square bar; Naturally display after the release 〉=12h; The pressure of colding pressing is 1.2 ~ 3.0MPa, and the time is 1.5 ~ 3.0h;

6) the bamboo square bar is softening: step 5) bamboo square bar adopts hot water or the softening mode of high-frequency heating to carry out; When hot water softened, programming rate was controlled at 1.5 ~ 2 ℃/h, 35 ~ 70 ℃ of temperature, softening time 24 ~ 72h; When high-frequency heating was softened, programming rate was controlled at 0.5 ~ 2 ℃/min, and temperature is controlled at 35 ~ 70 ℃, softening time 0.5 ~ 2h;

7) slicing must approach bamboo decoration material.

2. the manufacture method of sliced bamboo according to claim 1 is characterized in that described short bamboo segment length is 0.9 ~ 1.3m.

3. the manufacture method of sliced bamboo decoration material according to claim 1 and 2 is characterized in that institute's mortise head shapes is a zigzag, and space width is 6 ~ 12mm, the facewidth 0.9 ~ 1.8mm, and tooth length is 10 ~ 15mm.