Overall-bamboo anti-cracking processing method

A processing method and anti-cracking technology, which is applied to wood processing equipment, manufacturing tools, wood treatment, etc., can solve the problems of high cost and long processing time that do not reflect the industrial processing requirements of whole bamboo filling and crack prevention, etc.

Inactive Publication Date: 2010-12-29
BEIJING FORESTRY MACHINERY RES INST OF STATE FORESTRY ADMINISTRATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages and deficiencies of this technology are: low processing efficiency, high energy consumption, high cost of whole bamboo processing and no mature drying method;
The disadvantages and deficiencies of this technology are: the quality of the whole bamboo is unstable after air-drying, the weather resistance is poor, the processing time is long, and the efficiency is low.
[0005] The above two bamboo segment filling and drying technologies do not reflect the modern large-scale industrial treatment requirements for whole bamboo filling and anti-cracking, the treatment efficiency is low, and there is a lack of mature whole bamboo drying technology

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] a. Raw material preparation: choose 4-6 years old moso bamboo, the moso bamboo has a circumference of 250-500mm, and cut it into 0.5-2m bamboo sections, and scrape off the bamboo greens from the selected bamboo sections manually or with a green removal machine, so as to be just right It is better to remove the green bamboo without hurting the bamboo flesh. The thickness of the green bamboo scraped off is 0.5-1.5 mm. Using artificial method or mechanical method, small holes are pierced on the bamboo joints of the bamboo section. The size of the hole can be adjusted as required, and the diameter R of the hole is 5-20mm, which is convenient for the inner and outer bamboo walls to fully contact with the solution in the subsequent treatment.

[0033] b. Cooking treatment: immerse the bamboo section in a mixed solution of 0.8% sodium chloride and 1% acetic acid, and cook in boiling water at a temperature of 100° C. under normal pressure. The cooking time is 3 to 5 hours.

[...

Embodiment 2

[0042] In the present embodiment, the operation process is basically the same as in embodiment 1. In step b, the bamboo segment is immersed in a mixed solution of 3% sodium chloride and 4% acetic acid, and the temperature is 100 ° C under normal pressure. Cooking, the cooking time is 3 hours. In step c, immerse the bamboo section in a mixed solution of 42% alum and 40% polyethylene glycol, cook at a temperature of 130° C. and a pressure of 0.6 MPa, and the cooking time is 4 hours. In the drying process, the bamboo section obtained in step d is put into a wood steam drying kiln for drying; in the drying kiln, the temperature is first raised to 33-35 ° C at a rate of 0.3 ° C per hour, and the temperature is maintained for 5 hours, and then according to The temperature was raised to 48° C. at a rate of 0.5° C. per hour and maintained at this temperature for 6 hours. Water vapor is injected during drying, and the temperature of the injected water vapor is 110-115°C. The dehumidi...

Embodiment 3

[0044] In the present embodiment, the operation process is basically the same as in embodiment 1. In step b, the bamboo segment is immersed in a mixed solution of 8% sodium chloride and 9% acetic acid, and the temperature is 100° C. under normal pressure, and boiling water is carried out. Cooking, the cooking time is 4 hours. In step c, immerse the bamboo segment in a mixed solution of 45% alum and 55% polyethylene glycol, cook at a temperature of 180° C. and a pressure of 1.3 MPa, and the cooking time is 3 hours. In the drying process, the bamboo section obtained in step d is put into a wood steam drying kiln for drying; in the drying kiln, the temperature is first raised to 33-35 ° C at a rate of 0.5 ° C per hour, and the temperature is maintained for 6 hours, and then according to The temperature was raised to 48° C. at a rate of 0.1° C. per hour, and the temperature was maintained for 3 hours. Water vapor is injected during drying, and the temperature of the injected wate...

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PUM

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Abstract

The invention discloses an overall-bamboo anti-cracking stewing, stewing and filling, and drying method. The method comprises the following steps of: stewing a bamboo section in mixed solution of sodium chloride and acetic acid at the temperature of 100 DEG C under normal pressure, wherein bamboo green is removed from the bamboo section and a hole is punched on a bamboo joint or a bamboo wall; stewing and filling the bamboo section in the mixed solution of alum and polyethylene glycol at the temperature of 100 to 200 DEG C and under the pressure of 0.1 to 1.6 MPa; performing low-temperature drying on the bamboo section in a wood steam drying kiln; hydrofuging the drying kiln until the moisture content of the bamboo section reaches 5 to 20 percent; and unloading an overall-bamboo after slowly reducing the temperature of the kiln to indoor normal temperature. After the treatment, the overall-bamboo has the characteristics of better dryness and anti-cracking effect, improved stability, weather resistance and strength, and prolonged service life.

Description

technical field [0001] The invention belongs to the technical field of bamboo material modification, in particular to a method for preventing cracking of whole bamboo. Background technique [0002] my country is rich in bamboo resources and is the world's largest bamboo resource country. Bamboo has the characteristics of rapid growth, short rotation period, hollow bamboo joints, strong shear resistance, good rigidity, wear resistance, and excellent physical properties. Whole bamboo refers to the bamboo stalks that have been cut down without processing or only undergoing simple processing, such as not destroying the original cross-sectional structure of the bamboo, but just cutting it into a suitable length of bamboo, which can be used for construction, industrial and agricultural production, decoration and handicraft materials. At present, the utilization of bamboo in my country is mainly recombination utilization, and there are few studies on the deep processing and utiliz...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27K5/04B27K3/52B27K7/00
Inventor 傅万四余颖周建波
Owner BEIJING FORESTRY MACHINERY RES INST OF STATE FORESTRY ADMINISTRATION
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