CN111002418A - Method for manufacturing composite bamboo tube with interchangeable firm joint - Google Patents
Method for manufacturing composite bamboo tube with interchangeable firm joint Download PDFInfo
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- CN111002418A CN111002418A CN201911347330.7A CN201911347330A CN111002418A CN 111002418 A CN111002418 A CN 111002418A CN 201911347330 A CN201911347330 A CN 201911347330A CN 111002418 A CN111002418 A CN 111002418A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27M—WORKING OF WOOD NOT PROVIDED FOR IN SUBCLASSES B27B - B27L; MANUFACTURE OF SPECIFIC WOODEN ARTICLES
- B27M3/00—Manufacture or reconditioning of specific semi-finished or finished articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27J—MECHANICAL WORKING OF CANE, CORK, OR SIMILAR MATERIALS
- B27J1/00—Mechanical working of cane or the like
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K5/00—Treating of wood not provided for in groups B27K1/00, B27K3/00
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K5/00—Treating of wood not provided for in groups B27K1/00, B27K3/00
- B27K5/0085—Thermal treatments, i.e. involving chemical modification of wood at temperatures well over 100°C
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K9/00—Chemical or physical treatment of reed, straw, or similar material
- B27K9/002—Cane, bamboo
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- Engineering & Computer Science (AREA)
- Forests & Forestry (AREA)
- Wood Science & Technology (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
Abstract
The invention relates to a method for manufacturing a composite bamboo tube with interchangeable firm joints, which is characterized by comprising the following process steps: (1) processing the end part of the round bamboo; (2) the variable cross section of the end part of the round bamboo; (3) and (5) performing solid normalization treatment on the end part of the round bamboo. After the round bamboo end is grooved, the arc-shaped bamboo chips at the end can be bent inwards or outwards to the required size, and the filled resin is quickly cured to form the end with the specification section, so that the end can be easily connected with sawn timber, round bamboo and the like. The advantages are that: the composite round bamboo has the advantages of low production cost, controllable processing technology, short forming period, capability of processing the section size of the connecting end according to design, convenience for automatic production and interchangeable and rapid assembly. Can be widely used for furniture, home furnishing, bamboo building and the like, and is a sustainable environment-friendly material.
Description
Technical Field
The invention relates to a method for manufacturing a composite bamboo tube with interchangeable firm joints, belonging to the technical field of bamboo processing in the wood industry.
Background
With the shortage of wood resources, the environmental protection consciousness of people is enhanced, and the problem that the ideal substitute material is needed to be solved urgently in the household and building industries is found.
The bamboo wood is used as a biological material, the bamboo wood is produced by about thirty centimeters every day, the speed is higher than that of any other plant, the cylindrical structure of the bamboo wood is a wonderful structure formed naturally, the structure accords with the equal-strength design principle in material mechanics, is one of the best raw materials used as a structural material in the plant, has the characteristics of high strength, good elasticity, stable performance and small density, and is one of the unique building materials with the greatest environmental protection and high efficiency. However, because the wall of the round bamboo is thin and hollow, the cross section is mostly irregular and round, and has no transverse tissue except bamboo joints, and the height and taper change of the bamboo is large and the diameter grade is not in specification, how to design the round bamboo into parts (such as furniture, bamboo houses and buildings) capable of being assembled quickly is a difficult point. Therefore, according to the special structure of the bamboo tube, after the end part of the bamboo tube is grooved, the arc-shaped bamboo piece at the end head can be bent inwards or outwards to the required size, resin materials which can be quickly solidified and have certain hardness and strength are filled in the bamboo tube, wood rods, round bamboos and bamboo battens can be added in the end head of the bamboo tube for reducing the cost, the resin solidifies the wood rods, the round bamboos, the bamboo battens and the arc-shaped bamboos at the end surfaces of the bamboo materials into a whole, the end surface of the round bamboos becomes the section of a fixed specification, so that the bamboo tube can be easily connected with sawn timber, round bamboos and the like to manufacture furniture, houses, building materials and the like. And the tenon-and-mortise structure can also be matched on site, for example, resin is added after the position of the connecting piece is fixed, and the two connecting pieces are firmly combined after the resin is quickly cured.
Bamboo resources in China are intensively distributed in 14 provinces, cities and autonomous regions in the south of the Yangtze river. The reported bamboo species include 37 species and about 500 species, and the number of the species account for 1/2 in the world. The area of the bamboo forest in China is more than 1 hundred million mu, which accounts for 1/3 of the total area of the bamboo forest in the world; the bamboo is cut down by 1000 ten thousand tons every year, which is equivalent to 3600 more than ten thousand cubic meters of wood. The bamboo poles of the large bamboo materials in China are straight and straight, and the bamboo poles are ideal materials for furniture, home furnishing and buildings. In addition, the problems of easy worm damage, cracking, decay and mildew of bamboo wood are solved by the prior art, and the sustainable biomass resource is developed vigorously.
With the development of social economy and the increase of population, the global environmental pressure is increased, the environmental consciousness of governments and people of all countries is strengthened, the importance of ecological cycle is recognized, the bamboos have the advantages that the bamboos are successfully forested once, the underground stems can be used for whips, bamboo shoots and bamboo formation all year round, the bamboos are selectively cut all year round, and the bamboos are lifelong and can be continuously utilized. The bamboo grows rapidly, the growth cycle is short, have sustainability of the resource, do not destroy forest ecological resources.
Disclosure of Invention
The invention provides a method for manufacturing a composite bamboo tube with interchangeable firm joints, which aims to provide a method for manufacturing a standardized bamboo tube end with low production cost, controllable processing technology, short forming period, and a size of a connecting end section which can be processed and designed, is convenient for automatic production and has interchangeable rapid assembly by utilizing the characteristics of reasonable structure, high strength, good elasticity, hollow heat preservation and no need of saw cutting processing of the bamboo tube.
The technical solution of the invention is as follows: a method of manufacturing a composite bamboo tube having interchangeable strong joints, comprising the steps of: (1) pretreating round bamboos; (2) processing the end part of the round bamboo; (3) the variable cross section of the end part of the round bamboo; (4) and (5) performing solid normalization treatment on the end part of the round bamboo.
The round bamboo pretreatment in the step (1): and (3) heating the bamboo wood in saturated steam, and treating the bamboo wood in a saturated steam pressure tank at the temperature of 170-190 ℃ for 6-25 minutes.
The end part of the round bamboo in the step (2) is treated: the round bamboo is processed to the required length, when the bamboo sections are located in the end part of 60-200 mm, bamboo joints on the inner layer and the outer layer are removed, the bamboo joints are flush with the joints, the tabasheer part is dug or milled to be 1-8 mm, the outer circle of the end part is chamfered to be 1-3 mm, then the round bamboo is sawn or milled into 2-8 arc bamboo chips according to the cross section size of the end part required by assembly, the separation length is 60-200 mm close to the end part, and the bottom of the slot is a round hole larger than the notch.
The variable cross section of the end part of the round bamboo in the step (3): after the bamboo material is subjected to heat treatment, the arc-shaped bamboo chips at the ends of the bamboo material are bent inwards or outwards to be formed by heating, and the ends are compressed or expanded into cylindrical rings which are 2-40 mm smaller or larger than the average value of the outer diameters of the round bamboo materials and are matched with the diameters of the corresponding assembling holes.
And (4) performing solid normalization treatment on the end part of the round bamboo: inserting round wooden rods with smaller inner diameter or green-removed small round bamboos or bamboo splints into the end heads, then supporting the arc-shaped bamboo splints from the inside, putting the arc-shaped bamboo splints into a mold with a fixed shape, pouring resin into the end heads, solidifying the inner round wooden rods, the small round bamboos or bamboo splints and the outer bent arc-shaped bamboo splints into joints with specifications by the resin, and removing the mold to obtain the high-strength joint with the fixed cylindrical section.
The two ends of the bamboo wood are subjected to the fixed section treatment, or the ends are sealed by filling resin with the thickness of 30-120 mm at the other ends which do not need to be connected, so that the compression resistance and the cracking resistance of the ends are enhanced.
The resin is polyurethane or polyurea.
When the round bamboo end is connected with other materials, the round bamboo end is matched and connected on site, resin is added after the tenon-and-mortise structure is fixed in the position of the connecting piece, and the two connecting pieces are firmly combined after the resin is quickly cured.
The invention has the beneficial effects that:
1) the composite round bamboo has the advantages of optimal round structure, light weight, short growth period and simple production process.
2) Utilize the high characteristics of circle bamboo intensity itself, regard the thick bamboo tube as the bearing piece and with the panel or the assembly such as circle bamboo of the assembly hole groove that the processing corresponds in advance, can accomplish standardized quick assembly connection, and because the connection between circle bamboo and panel, circle bamboo is mortise and tenon structure, sound construction stability is good.
Drawings
FIG. 1 is a schematic structural view of a composite bamboo tube with a reduced upper end and a sealed lower end.
In the figure: 1 is the circle bamboo, and 2 are arc bamboo chip, and 3 are resin cured layer, and 4 are the log stick, and 5 are the resin cured layer of the end of sealing in the circle bamboo section of thick bamboo, and 6 are the notch of processing on the circle bamboo.
Detailed Description
As shown in the attached figure 1, the manufacturing method for the bamboo tube end convenient to connect comprises the following process steps: (1) processing the end part of the round bamboo; (2) the variable cross section of the end part of the round bamboo; (3) and (5) performing solid normalization treatment on the end part of the round bamboo.
The end part of the round bamboo in the step (1) is treated: the round bamboo is processed to the required length, when the bamboo sections are located in the end part 60-200 mm, outer bamboo joints are removed firstly, the bamboo sections are flush with the joints, the tabasheer parts are dug or milled to be 1-8 mm, the outer circle of the end part is chamfered to be 1-3 mm, then the bamboo sections are sawed or milled into 2-8 arc bamboo pieces according to the cross section size of the end part required by assembly, the separation length is 60-200 mm close to the end part, and the bottom of the groove is a round hole larger than the notch.
The variable cross section of the end part of the round bamboo in the step (2): after the bamboo is subjected to heat treatment, the arc-shaped bamboo chips at the ends of the bamboo are bent inwards or outwards to be formed by heating, and the ends are compressed or expanded into cylindrical rings which are 2-40 mm smaller or larger than the average value of the outer diameters of the round bamboos and are just matched with the diameters of the corresponding assembling holes.
And (3) performing solid normalization treatment on the end part of the round bamboo: inserting a round wooden stick or a small round bamboo with the inner diameter smaller than that of the round wooden stick or the small round bamboo with the green removed into the end, then supporting the arc-shaped bamboo chips from the inside, putting the arc-shaped bamboo chips into a mold with a fixed shape, pouring prepared resin into the end, and solidifying the inner round wooden stick, the small round bamboo, the bamboo strips and the outer bent arc-shaped bamboo chips into a joint with a specification within 5-40 min by the resin, so as to obtain the high-strength joint with the fixed section after removing the mold.
The round bamboo can be used as the material of furniture, bamboo house, house and building after the treatment.
Example 1
The manufacturing method for the bamboo tube end convenient to connect comprises the following steps:
(1) processing the end part of the round bamboo: selecting a non-bending material with the diameter of 76-90mm just cut into a moso bamboo tube, sawing the moso bamboo tube into 750mm pieces, digging off 3mm of tabasheer part close to 140mm of the upper part, chamfering 3mm of the excircle of the end part, sawing the moso bamboo tube into 4 arc bamboo pieces, wherein the separation length is close to 140mm of the end part, and the bottom of the groove is a round hole larger than the notch.
(2) Variable cross section of round bamboo end: the bamboo is heat treated in a saturated steam pressure tank at 180 deg.c for 15 min, and the end bent inwards to form the ring with outer diameter 70mm fitting the corresponding assembling hole. And drying the mixture until the water content is 10-15%.
(3) And (3) performing solid normalization treatment on the end part of the round bamboo: inserting round wood rods with the length of 120mm and the diameter of about 35mm into the end heads, then supporting the arc-shaped bamboo chips from the inside, putting the round wood rods into a mold with the outer diameter of 70mm, pouring prepared resin into the end heads, wherein the length of the resin is 120mm away from the end heads, and the resin can solidify the round wood rods inside into joints with specifications within 10 min; after the resin at the end is cured, resin with the height of 50mm is filled into the other end of the bamboo tube, and the high-strength joint with the fixed section with the outer diameter of 70mm is obtained after the die is removed. Can be higher than the high ground of packing and bore the aperture in the thick bamboo tube wall when resin is filled in, beat the resin in the thick bamboo tube, the resin is beaten and is gone into the resin and can pass through vibrations ram-up as required after beating thick bamboo tube both ends.
Example 2
The manufacturing method for the bamboo tube end convenient to connect comprises the following steps:
(1) processing the end part of the round bamboo: the fresh mao bamboo tube is selected to be made of materials with the diameter of 80-100 mm and free of bending, the materials are sawed into 2400mm, the bamboo yellow part close to the upper portion of 200mm is dug out for 3mm, the outer circle of the end portion is chamfered for 3mm, then the fresh mao bamboo tube is sawed into 8 arc-shaped bamboo chips, the separation length is close to the end portion of 200mm, and the bottom of the groove is a round hole larger than the notch.
(2) Variable cross section of round bamboo end: the bamboo is heat treated in a saturated steam pressure tank at 180 deg.c for 12 min, and the end bent inwards to form the ring with outer diameter 70mm fitting the corresponding assembling hole. And drying the mixture until the water content is 10-15%.
(3) And (3) performing solid normalization treatment on the end part of the round bamboo: inserting round bamboos with the length of 120mm and the diameter of 40mm into the end head, then supporting arc bamboo chips of the round bamboos from the inside, putting the arc bamboo chips into a mold with the outer diameter of 70mm, pouring prepared resin into the end head, wherein the length of the resin is 150mm away from the end head, and the resin can solidify the inner round bamboos into a joint with the specification within 10 min; after the resin at the end is cured, resin with the height of 50mm is filled into the other end of the bamboo tube, and the high-strength joint with the fixed section with the outer diameter of 70mm is obtained after the die is removed. Can be higher than the high ground of packing and bore the aperture in the thick bamboo tube wall when resin is filled in, beat the resin in the thick bamboo tube, the resin is beaten and is gone into the resin and can pass through vibrations ram-up as required after beating thick bamboo tube both ends.
The processed round bamboo can be used as a bamboo wall column material.
Claims (8)
1. A manufacturing method of a composite bamboo tube with interchangeable firm joints is characterized by comprising the following steps:
(1) pretreating round bamboos;
(2) processing the end part of the round bamboo;
(3) the variable cross section of the end part of the round bamboo;
(4) and (5) performing solid normalization treatment on the end part of the round bamboo.
2. The method of manufacturing a composite bamboo tube with interchangeable strong joints according to claim 1, wherein the step (1) of round bamboo pre-treatment: and (3) heating the bamboo wood in saturated steam, and treating the bamboo wood in a saturated steam pressure tank at the temperature of 170-190 ℃ for 6-25 minutes.
3. The method of manufacturing a composite bamboo tube with interchangeable strong joints as recited in claim 1, wherein the step (2) of round bamboo end treatment: the round bamboo is processed to the required length, when the bamboo sections are located in the end part of 60-200 mm, bamboo joints on the inner layer and the outer layer are removed, the bamboo joints are flush with the joints, the tabasheer part is dug or milled to be 1-8 mm, the outer circle of the end part is chamfered to be 1-3 mm, then the round bamboo is sawn or milled into 2-8 arc bamboo chips according to the cross section size of the end part required by assembly, the separation length is 60-200 mm close to the end part, and the bottom of the slot is a round hole larger than the notch.
4. The method as claimed in claim 1, wherein the step (3) of the variable cross section of the round bamboo end portion comprises: after the bamboo material is subjected to heat treatment, the arc-shaped bamboo chips at the ends of the bamboo material are bent inwards or outwards to be formed by heating, the ends are compressed or expanded into cylindrical rings which are 2-40 mm smaller or larger than the average value of the outer diameters of the round bamboo, and the cylindrical rings are manufactured by matching with the diameters of the corresponding assembling holes.
5. The method as claimed in claim 1, wherein the step (4) of the solid normalization of the round bamboo ends comprises: inserting round wooden rods with smaller inner diameter or green-removed small round bamboos or bamboo splints into the end heads, then supporting the arc-shaped bamboo splints from the inside, putting the arc-shaped bamboo splints into a mold with a fixed shape, pouring resin into the end heads, solidifying the inner round wooden rods, the small round bamboos or bamboo splints and the outer bent arc-shaped bamboo splints into joints with specifications by the resin, and removing the mold to obtain the high-strength joint with the fixed cylindrical section.
6. The method as claimed in claim 1, wherein the bamboo is processed into fixed cross-section at both ends, or the ends are sealed by filling resin with thickness of 30-120 mm at the other end not required to be connected, so as to enhance the compression resistance and crack resistance of the ends.
7. The method as claimed in claim 5 or 6, wherein the resin is polyurethane or polyurea.
8. The method as claimed in claim 1, wherein the round bamboo ends are connected to other materials by field fabrication, and the tenon-and-mortise structure is fixed to the connecting members and then resin is added to the fixed connecting members, and the resin is rapidly cured to firmly connect the two connecting members.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911347330.7A CN111002418A (en) | 2019-12-24 | 2019-12-24 | Method for manufacturing composite bamboo tube with interchangeable firm joint |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911347330.7A CN111002418A (en) | 2019-12-24 | 2019-12-24 | Method for manufacturing composite bamboo tube with interchangeable firm joint |
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| CN111002418A true CN111002418A (en) | 2020-04-14 |
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| CN201911347330.7A Pending CN111002418A (en) | 2019-12-24 | 2019-12-24 | Method for manufacturing composite bamboo tube with interchangeable firm joint |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115627843A (en) * | 2022-10-26 | 2023-01-20 | 中国五冶集团有限公司 | Bamboo arch closure connecting structure and connecting method |
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| CN109808007A (en) * | 2019-03-22 | 2019-05-28 | 南京林业大学 | A kind of production method of the thick bamboo tube end convenient for connection |
| CN109866293A (en) * | 2019-03-22 | 2019-06-11 | 南京林业大学 | A kind of end standardization manufacturing method of round bamboo component |
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2019
- 2019-12-24 CN CN201911347330.7A patent/CN111002418A/en active Pending
Patent Citations (6)
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| CN1467066A (en) * | 2003-02-17 | 2004-01-14 | 勇 林 | High strength bamboo rod and method for producing the same |
| DE202015104295U1 (en) * | 2015-08-14 | 2015-10-05 | Jörn Niederländer | rod element |
| CN109304778A (en) * | 2018-10-19 | 2019-02-05 | 浙江农林大学暨阳学院 | A kind of manufacturing method and products thereof of high-performance bamboo fiber reinforced plastics |
| CN109808007A (en) * | 2019-03-22 | 2019-05-28 | 南京林业大学 | A kind of production method of the thick bamboo tube end convenient for connection |
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| CN115627843A (en) * | 2022-10-26 | 2023-01-20 | 中国五冶集团有限公司 | Bamboo arch closure connecting structure and connecting method |
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