CN116175721A - Production method of bamboo highway protective fence - Google Patents
Production method of bamboo highway protective fence Download PDFInfo
- Publication number
- CN116175721A CN116175721A CN202310438798.7A CN202310438798A CN116175721A CN 116175721 A CN116175721 A CN 116175721A CN 202310438798 A CN202310438798 A CN 202310438798A CN 116175721 A CN116175721 A CN 116175721A
- Authority
- CN
- China
- Prior art keywords
- bamboo
- paving
- curtain
- yellow
- bamboo curtain
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000011425 bamboo Substances 0.000 title claims abstract description 317
- 235000017166 Bambusa arundinacea Nutrition 0.000 title claims abstract description 313
- 235000017491 Bambusa tulda Nutrition 0.000 title claims abstract description 313
- 241001330002 Bambuseae Species 0.000 title claims abstract description 313
- 235000015334 Phyllostachys viridis Nutrition 0.000 title claims abstract description 313
- 230000001681 protective effect Effects 0.000 title claims abstract description 30
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 27
- 238000000034 method Methods 0.000 claims abstract description 18
- 239000003292 glue Substances 0.000 claims abstract description 12
- 238000003825 pressing Methods 0.000 claims abstract description 12
- 238000012805 post-processing Methods 0.000 claims abstract description 8
- 238000010438 heat treatment Methods 0.000 claims abstract description 7
- 230000000750 progressive effect Effects 0.000 claims abstract description 4
- 238000007598 dipping method Methods 0.000 claims abstract description 3
- 238000009958 sewing Methods 0.000 claims abstract description 3
- 239000010410 layer Substances 0.000 claims description 33
- 238000009941 weaving Methods 0.000 claims description 23
- 239000000853 adhesive Substances 0.000 claims description 20
- 230000001070 adhesive effect Effects 0.000 claims description 20
- 238000000465 moulding Methods 0.000 claims description 16
- 229910000831 Steel Inorganic materials 0.000 claims description 15
- 239000010959 steel Substances 0.000 claims description 15
- 239000000463 material Substances 0.000 claims description 13
- 238000004026 adhesive bonding Methods 0.000 claims description 10
- 238000002791 soaking Methods 0.000 claims description 6
- 239000002344 surface layer Substances 0.000 claims description 6
- 239000012792 core layer Substances 0.000 claims description 5
- 238000005336 cracking Methods 0.000 claims description 5
- 238000005520 cutting process Methods 0.000 claims description 4
- 238000007723 die pressing method Methods 0.000 claims description 4
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical class [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 238000003892 spreading Methods 0.000 claims description 3
- 230000006835 compression Effects 0.000 claims description 2
- 238000007906 compression Methods 0.000 claims description 2
- 235000013372 meat Nutrition 0.000 claims description 2
- 239000002356 single layer Substances 0.000 claims description 2
- 238000009490 roller compaction Methods 0.000 claims 1
- 238000012545 processing Methods 0.000 abstract description 9
- 238000001723 curing Methods 0.000 abstract description 4
- 230000006378 damage Effects 0.000 abstract description 3
- 239000000956 alloy Substances 0.000 abstract description 2
- 229910045601 alloy Inorganic materials 0.000 abstract description 2
- 238000009954 braiding Methods 0.000 abstract 1
- 238000009740 moulding (composite fabrication) Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 8
- 238000005470 impregnation Methods 0.000 description 6
- 230000004888 barrier function Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 244000153158 Ammi visnaga Species 0.000 description 1
- 235000010585 Ammi visnaga Nutrition 0.000 description 1
- 239000004699 Ultra-high molecular weight polyethylene Substances 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 229920000785 ultra high molecular weight polyethylene Polymers 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Images
Classifications
-
- 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
- B27M3/12—Manufacture or reconditioning of specific semi-finished or finished articles of railings, stairs, stair stringers, ladders, or parts thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27D—WORKING VENEER OR PLYWOOD
- B27D1/00—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring
- B27D1/04—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring to produce plywood or articles made therefrom; Plywood sheets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27D—WORKING VENEER OR PLYWOOD
- B27D1/00—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring
- B27D1/10—Butting blanks of veneer; Joining same along edges; Preparatory processing of edges, e.g. cutting
-
- 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
-
- 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
- B27J1/003—Joining the cane side by side
- B27J1/006—Joining the cane side by side by strand or wire twisting
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F15/00—Safety arrangements for slowing, redirecting or stopping errant vehicles, e.g. guard posts or bollards; Arrangements for reducing damage to roadside structures due to vehicular impact
- E01F15/02—Continuous barriers extending along roads or between traffic lanes
- E01F15/04—Continuous barriers extending along roads or between traffic lanes essentially made of longitudinal beams or rigid strips supported above ground at spaced points
- E01F15/0453—Rails of materials other than metal or concrete, e.g. wood, plastics; Rails of different materials, e.g. rubber-faced metal profiles, concrete-filled steel tubes
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Forests & Forestry (AREA)
- Wood Science & Technology (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Refuge Islands, Traffic Blockers, Or Guard Fence (AREA)
Abstract
The invention discloses a production method of a bamboo highway protective fence, which comprises the following steps: the method comprises the steps of bamboo chord direction slicing, braiding or sewing into bamboo curtains by using ropes, water content control operation, waterproof weather-proof glue dipping, water content control, longitudinal and transverse side-by-side paving or central symmetry paving in the width direction of the bamboo curtains, transverse progressive mould pressing positioning on a mould, heating, curing and forming, and post processing into the highway protective fence. The invention uses the renewable bamboo with low cost to process the anti-collision guardrail for replacing the existing highway alloy, realizes the high-value, new field and mass production and processing of the bamboo, has the advantages of simple and convenient operation, flexible means, strong anti-collision capability of the product, small secondary damage to vehicles and personnel and remarkable social and economic benefits.
Description
Technical Field
The invention relates to the technical field of bamboo processing, in particular to a production method of a bamboo highway protective fence.
Background
Bamboo processing and utilization has achieved tremendous success over the past decades, and has provided people with a variety of living, production products and decorative articles. However, with the technical development of wood products, bamboo processed products face problems of high processing cost, low yield and insufficient utilization of superior characteristics of bamboo itself, which limits further development thereof. For example, bamboo has high longitudinal strength, good toughness and strong shock resistance, so that the bamboo has advantages in the production of bamboo toothpicks, bamboo chopsticks, automobile bottom boards and container boards, but is not applied to the production of highway protective railings in another important field. Patent application with publication number CN1958274A discloses an ultra-high molecular weight polyethylene highway guardrail material and a manufacturing method thereof; patent application with publication number CN 104629215A discloses a novel polymer automobile crash barrier material; patent application with publication number of CN107176810A discloses an environment-friendly ecological stone-like guardrail material and a preparation method thereof, and the three patent applications do not show the technology of bamboo in the aspect of highway guardrail production.
Technical data on the production of highway barriers from bamboo is not reported from other technical literature, including treatises. Although the existing highway protective guard plays an important role in vehicle driving safety and reducing casualties and vehicle loss, a large number of accidents with insufficient protection still occur, such as serious injury or death of domestic personnel caused by the fact that guardrails penetrate through a carriage, and the subsequent problems of incapability of opening a vehicle door caused by the fact that the protective guard is seriously bent due to insufficient toughness of the protective guard until the vehicle is blocked and pressed. At present, a production method of the highway protective fence with reasonable price and excellent performance is lacking.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides a production method of a bamboo highway protective fence, which solves the technical problem of producing the highway protective fence by utilizing bamboo.
The aim of the invention is realized by the following technical scheme: the production method of the bamboo highway protective fence comprises the following steps:
step one: splitting bamboo in the chord direction: carrying out circumferential rotary cutting on the bamboo or splitting the bamboo in the chord direction after splitting the bamboo radially to obtain a bamboo chip close to the green bamboo, a bamboo chip close to the yellow bamboo and a bamboo chip of the meat bamboo, wherein the surface of the bamboo chip close to the green bamboo does not contain the green bamboo, the surface of the bamboo chip close to the yellow bamboo does not contain the yellow bamboo, the thicknesses of the 3 bamboo chips are less than 1.35mm, the transverse cracking phenomenon is allowed, and the longitudinal cracking trace of the bamboo chip cannot occur;
step two: weaving or sewing the bamboo chips after the step one into a bamboo curtain by adopting a rope: the bamboo chips of the same type are woven or stitched into a bamboo curtain by using ropes, the spacing between the ropes for weaving or stitching is not more than 220mm, the spacing between the ropes for weaving near the green of the bamboo is small, the spacing between the ropes for weaving near the yellow of the bamboo is large, and the spacing between the ropes for weaving near the yellow of the bamboo is medium;
step three: performing water content control operation on the woven or stitched bamboo curtain in the second step to enable the water content to be 5.5% -7.3%;
step four: impregnating waterproof weather-proof glue: impregnating the bamboo curtain with waterproof weather-proof impregnating adhesive, wherein the impregnating amount (the solid content) of the waterproof weather-proof impregnating adhesive is not less than 5%, but not more than 20%;
step five: and (3) water content control: the water content of the bamboo curtain after gum dipping is controlled below the temperature at which the waterproof weather-resistant gum cannot be solidified, the water content is controlled to be 8.2% -13.7%, the water content of the bamboo curtain close to the green bamboo curtain is measured to be a large value, the water content of the bamboo curtain close to the yellow bamboo curtain is measured to be a middle value, and the water content of the bamboo curtain close to the yellow bamboo curtain is measured to be a small value;
step six: spreading the bamboo curtain vertically and horizontally in a one-sided way: paving the long bamboo curtain to the other side by taking one side surface of the long side as a reference, symmetrically paving the long side of the long bamboo curtain in the thickness direction in a longitudinal and transverse manner, paving the bamboo curtain close to the bamboo green bamboo curtain on the surface layer, paving the bamboo curtain close to the bamboo yellow bamboo curtain in the longitudinal direction, paving the bamboo curtain close to the bamboo yellow bamboo curtain in the middle layer, paving the bamboo curtain close to the bamboo yellow bamboo curtain on the core layer, and paving the bamboo curtain close to the bamboo yellow bamboo curtain longitudinally or transversely, wherein the bamboo curtain close to the bamboo yellow bamboo curtain is not suitable for guard rails with high requirements on highways and the like, and the total paved layer number is at least three;
or the bamboo curtain is paved transversely and centrally symmetrically: paving the two sides of the long bamboo curtain by taking the central line between the two long sides of the long bamboo curtain as a reference, symmetrically paving the long and short middle sides in the thickness direction, paving the bamboo curtain close to the bamboo green bamboo curtain on the surface layer, longitudinally paving the bamboo curtain close to the bamboo green bamboo curtain, paving the bamboo curtain close to the bamboo yellow bamboo curtain on the middle layer, transversely paving the bamboo curtain close to the bamboo yellow bamboo curtain, paving the bamboo curtain close to the bamboo yellow bamboo curtain on the core layer, and longitudinally or transversely paving the bamboo curtain close to the bamboo yellow bamboo curtain, wherein a guard rail with high requirements on expressways and the like is not suitable to adopt the bamboo curtain close to the bamboo yellow layer, and the total paved layer is at least three layers;
step seven: transverse progressive die pressing: placing the blanks paved in the step six on a male and female fixed steel die, compacting and positioning the blanks according to the paving standard (the alignment surface) in the step six, and then gradually compacting the male and female movable steel die matched with the male and female fixed steel die from the compacting and positioning position to the free end, gradually compacting the blanks from the aligned side to the other side for one-side alignment pavement, and gradually compacting the blanks from the center to the two sides for center symmetry pavement;
step eight: and (5) heating, solidifying and forming: heating and pressurizing in a mould, and determining specific forming temperature and time by combining the thickness of the guardrail blank according to the requirement of adopting the waterproof weather-proof adhesive type, wherein the average unit pressure is 3.8-25 MPa;
step nine: post-processing: and (3) carrying out post-processing on the compression molded product according to the requirements of the highway protective guard to obtain the bamboo highway protective guard.
Further, the near-green bamboo chips refer to parts which are close to green bamboo and have the thickness not exceeding 1/4 of the wall thickness of bamboo and are free of non-glueable materials, the near-yellow bamboo chips refer to parts which are close to yellow bamboo and have the thickness not exceeding 1/3 of the wall thickness of bamboo and are free of non-glueable materials, and the parts between the near-green bamboo and the near-yellow bamboo are bamboo flesh parts.
Furthermore, the waterproof weather-proof impregnating adhesive adopts a molecular weight not more than 300, an initial viscosity not more than 15S and a surface tension less than 34 multiplied by 10 -3 N/m modified phenolic resin glue.
Further, the bamboo chips are divided into two types according to the lengths of the bamboo chips, one type is long bamboo chips, the length of the long bamboo chips exceeds the standard length by 20mm, and the other type is short bamboo chips, and the length of the short bamboo chips exceeds the standard required material width by 30mm; the weaving width of the long bamboo chips exceeds 50mm of the arc-shaped length of the standard width of the protective guard, the weaving width of the short bamboo chips exceeds 40mm of the length of the protective guard, the distances among the single layers and the chips are smaller than a set threshold value, the widths are consistent, the weaving rope spacing is not more than 220mm, the same product is the minimum in weaving rope spacing of the near-bamboo green, the bamboo flesh is secondary, and the near-bamboo yellow is the maximum.
Further, in the fourth step, the soaking method is preferably vacuum-followed high-pressure soaking, roll-pressing in glue or rolling soaking.
Further, the thickness of the string after being pressed by 10N/cm is not more than 0.13mm.
The beneficial effects of the invention are as follows: the invention uses the renewable bamboo with low cost to process the renewable bamboo into the crash barrier which replaces the existing highway alloy, reduces the consumption of non-renewable resources and realizes the comprehensive benefits of cost, performance and ecological environmental protection; meanwhile, the method realizes high-valued, new field and mass production and processing of bamboo, and has the advantages of simple operation, flexible means, strong impact resistance, large friction coefficient and small secondary damage to vehicles and personnel, and has remarkable social and economic benefits. The bamboo chord direction splits are divided into bamboo splints which are nearly green, bamboo splints which are nearly yellow and bamboo splints of bamboo flesh, the surfaces of the bamboo splints which are nearly green do not contain green, the surfaces of the bamboo splints which are nearly yellow do not contain yellow, the thicknesses of the 3 bamboo splints are less than 1.35mm, so that the impregnation effect of waterproof weather-proof glue solution in the later stage of the bamboo splints is improved, the defects generated in the process of transversely paving bamboo curtain mould pressing deformation are reduced, and the spreadability of each paving layer is improved. The water content is controlled before the waterproof weather-proof glue is immersed, so that the immersing quality and efficiency of the waterproof weather-proof glue in the later stage are improved. And the water content of the glued bamboo curtain is controlled so as to reduce the quality and efficiency of mould pressing gluing, reduce the internal stress of the guard rail blank after forming and improve the stability of the product. The bamboo curtain is paved vertically and horizontally with one side being aligned or transversely and centrally symmetrically, so that the longitudinal and transverse directions of the bamboo curtain can be fully stretched, deformed and mutually displaced in the die pressing process, machining allowance is reduced, energy consumption is reduced, phenomena of breakage, superposition and the like of bamboo chips in the bamboo curtain are eliminated, and conditions are created for realizing ideal low-stress gluing and forming of the vertically and horizontally bamboo curtain.
Drawings
FIG. 1 is a schematic diagram of two-waveform one-sided paving molding;
FIG. 2 is a schematic diagram of a three-wave form side-by-side paving molding;
FIG. 3 is a schematic diagram of two-waveform center-symmetrical pavement molding;
fig. 4 is a schematic diagram of a three-waveform center-symmetrical pavement molding.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings.
The invention relates to a method for producing highway protective fence by bamboo, which comprises the following steps:
step one: splitting bamboo in the chord direction: carrying out circumferential rotary cutting on the bamboo or splitting the bamboo in the chord direction after splitting the bamboo radially to obtain bamboo chips close to green bamboo chips, bamboo chips close to yellow bamboo chips and bamboo pulp, wherein the surfaces of the bamboo chips close to green bamboo chips do not contain green bamboo, the surfaces of the bamboo chips close to yellow bamboo chips do not contain yellow bamboo chips, the thicknesses of the 3 bamboo chips are less than 1.35mm, so that the impregnation effect of waterproof weather-proof glue solution in the later stage of the bamboo chips is improved, the defects generated in the process of transversely paving a bamboo curtain for compression molding are reduced, and the spreadability of each paving layer is improved; allowing transverse cracking but not causing longitudinal fracture marks to appear on the bamboo chips so as to improve the longitudinal and transverse impact resistance of the guard rail after gluing; the bamboo chips near the bamboo green and the thickness is not more than 1/4 of the wall thickness of the bamboo and are free of non-gluing materials, the bamboo chips near the bamboo yellow and the thickness is not more than 1/3 of the wall thickness of the bamboo and are free of non-gluing materials, and the bamboo flesh part is between the bamboo green and the bamboo yellow. For the same type of bamboo chips, the bamboo chips are classified into two types according to the length of the bamboo chips, one type is long bamboo chips, the length of the long bamboo chips exceeds the standard length (the standard length is 4320 mm) by 20mm, and the other type is short bamboo chips, the length of the short bamboo chips exceeds the standard required material width (including the arc length in the width direction and the plane width at each angle, and the total of 540mm (two waveforms) and 850mm (three waveforms)) by 30mm.
Step two: the bamboo chips after the first step are woven or sewn into a bamboo curtain by using a rope, and the thickness of the rope after being pressed by 10N/cm is required to be not more than 0.13mm, so that the influence of the rope on the gluing performance of the bamboo in the mould pressing process is reduced; for long bamboo chips, the weaving width of the long bamboo chips is 50mm which exceeds the standard width arc-shaped length (540 mm (two waveforms) and 850mm (three waveforms)) of the guard rail, the weaving width of the short bamboo chips is 40mm which exceeds the length (4320 mm) of the guard rail, the smaller and better the distance between the single-chip layers and the single-chip layers is, the weaving or stitching widths are as consistent as possible, the same type of bamboo chips are required to be woven or stitched into a bamboo curtain by using ropes, the spacing of the ropes for weaving or stitching is not more than 220mm, the weaving rope spacing of the same product close to the bamboo green is minimum, the intermediate value of bamboo flesh is the maximum, the error between each layer in the later paving and molding processes is met, the cutting amount is reduced, and raw materials are saved.
Step three: performing water content control operation on the woven or stitched bamboo curtain in the second step to enable the water content to be 5.5% -7.3%; so as to improve the impregnation quality and efficiency of the waterproof weather-proof adhesive in the later stage.
Step four: impregnating waterproof weather-proof glue: impregnating the bamboo curtain by using commercially available waterproof weather-proof impregnating adhesive, wherein the impregnating method is preferably vacuum impregnation followed by high-pressure impregnation, rolling or rolling impregnation in the adhesive, the impregnating amount (solid content) of the waterproof weather-proof impregnating adhesive is not less than 5 percent but not more than 20 percent, the impregnating is required to be uniform, and no obvious flow mark exists after micro-drying; the waterproof weather-proof impregnating adhesive can be modified phenolic resin adhesive, the molecular weight of the adhesive is not more than 300, the initial viscosity is not more than 15S, and the surface tension is less than 34 multiplied by 10 -3 N/m; other waterproof weather-proof adhesives can be adopted, and the bamboo curtain can be firstly subjected to waterproof weather-proof treatment and then glued according to the requirements of users.
Step five: and (3) water content control: the water content of the impregnated bamboo curtain is controlled below the temperature at which the waterproof weather-resistant adhesive cannot be cured, the water content of the impregnated bamboo curtain is controlled to be 8.2% -13.7%, the water content of the bamboo curtain close to the green bamboo curtain is measured to be a large value, the bamboo flesh is a middle value, and the water content of the bamboo flesh is measured to be a small value close to the yellow bamboo; the method has the advantages that the quality and the efficiency of mould pressing gluing are improved, the bamboo gluing process of 'hot in and hot out' is realized, the internal stress of the guard rail blank after forming is reduced, and the stability of products is improved.
Step six: spreading the bamboo curtain vertically and horizontally in a one-sided way: taking one side face of the long side of the long bamboo curtain as a reference (an aligned face), paving the long side face to the other side, and symmetrically paving the long side face and the middle side face in the thickness direction, wherein the outer layer (surface layer) adopts a bamboo curtain close to a bamboo green layer for longitudinal paving, the middle layer adopts a bamboo curtain with a bamboo flesh layer for transverse paving, the core layer adopts a bamboo curtain close to a bamboo yellow layer for longitudinal or transverse paving, but for guard rails with high requirements on highways and the like, the bamboo curtain close to the bamboo yellow layer is not suitable to be adopted, the paving layer number is determined according to the product requirement, and the total paving layer number is at least three;
or the bamboo curtain is paved transversely and centrally symmetrically: the central line between two long sides of the long bamboo curtain is taken as a reference (the alignment surface), the two side surfaces are paved, the longitudinal and transverse middle-surface symmetrical pavement is carried out in the thickness direction, the bamboo curtain close to the green layer is paved on the surface layer, the longitudinal pavement is carried out, the bamboo curtain close to the bamboo layer is paved on the middle layer, the transverse pavement is carried out, the bamboo curtain close to the tabasheer layer is paved on the core layer, and the longitudinal or transverse pavement is carried out, but for the guard rail with high requirements of highways and the like, the bamboo curtain close to the tabasheer layer is not adopted, and the total paved layer number is at least three;
step seven: transverse progressive die pressing: placing the blanks paved in the step six on a male and female fixed steel die a, compacting and positioning the blanks according to the paving standard (the alignment surface) in the step six, then gradually compacting the male and female movable steel dies matched with the male and female fixed steel dies from the compacting and positioning position to the free end, and gradually compacting the blanks from one side to the other side in alignment, wherein as shown in fig. 1 and 2, fig. 1 is a schematic diagram of compacting and molding of two waveforms on one side, and serial numbers 1-9 are the male and female movable steel dies, and orderly compacting the blanks from 1-9; FIG. 2 is a schematic diagram of three-waveform one-side paving and molding, wherein the serial numbers 1-13 are male and female movable steel dies, and the two steel dies are sequentially pressed from 1-13; for central symmetrical pavement, gradually pressing from the center to two sides, as shown in fig. 3 and 4, fig. 3 is a schematic diagram of central symmetrical pavement molding of two waveforms, serial numbers 1-5 are male and female movable steel dies, and the pressing is sequentially and symmetrically performed from 1-5; FIG. 4 is a schematic diagram of a three-waveform central symmetry paving mold, wherein serial numbers 1-7 are male and female movable steel molds, and the two steel molds are symmetrically pressed in sequence from 1-7; the two pressing modes are adopted to enable the longitudinal and transverse directions of the bamboo curtain to be fully stretched, deformed and mutually displaced in the pressing process of the mould, eliminate the phenomena of breakage, superposition and the like of bamboo chips in the bamboo curtain, and create conditions for realizing ideal low-stress gluing and forming of the longitudinal and transverse bamboo curtain;
step eight: and (5) heating, solidifying and forming: heating and pressurizing in a mould, and determining specific forming temperature and time according to the type of waterproof weather-proof adhesive and the thickness of the guardrail blank, wherein the curing mode of 'lower temperature and longer time' required by curing the adhesive is adopted, and the curing temperature can be properly increased according to the requirement of productivity; and the average unit pressure is 3.8MPa to 25MPa; high-requirement guard rails such as expressways take large values, and common roads or common guard rails take small values; the number of paving layers is large or the thickness of the blank can be larger, otherwise, smaller value can be taken.
Step nine: post-processing: and (3) carrying out post-processing on the molded product b according to the requirements of the highway protective guard, wherein the post-processing comprises the steps of carrying out accurate dimension processing, surface roughness processing, coating processing, connecting hole processing, reinforcing strip mounting and the like on the molded bamboo protective guard blank, and finally obtaining the bamboo highway protective guard.
The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the scope of the invention, and all equivalent structures or equivalent processes using the descriptions and drawings of the present invention or directly or indirectly applied to other related technical fields are included in the scope of the invention.
Claims (6)
1. The production method of the bamboo highway protective fence is characterized by comprising the following steps of:
step one: splitting bamboo in the chord direction: carrying out circumferential rotary cutting on the bamboo or splitting the bamboo in the chord direction after splitting the bamboo radially to obtain a bamboo chip close to the green bamboo, a bamboo chip close to the yellow bamboo and a bamboo chip of the meat bamboo, wherein the surface of the bamboo chip close to the green bamboo does not contain the green bamboo, the surface of the bamboo chip close to the yellow bamboo does not contain the yellow bamboo, the thicknesses of the 3 bamboo chips are less than 1.35mm, the transverse cracking phenomenon is allowed, and the longitudinal cracking trace of the bamboo chip cannot occur;
step two: weaving or sewing the bamboo chips after the step one into a bamboo curtain by adopting a rope: the bamboo chips of the same type are woven or stitched into a bamboo curtain by using ropes, the spacing between the ropes for weaving or stitching is not more than 220mm, the spacing between the ropes for weaving near the green of the bamboo is small, the spacing between the ropes for weaving near the yellow of the bamboo is large, and the spacing between the ropes for weaving near the yellow of the bamboo is medium;
step three: performing water content control operation on the woven or stitched bamboo curtain in the second step to enable the water content to be 5.5% -7.3%;
step four: impregnating waterproof weather-proof glue: impregnating the bamboo curtain by adopting waterproof weather-proof impregnating adhesive, wherein the impregnating amount of the waterproof weather-proof impregnating adhesive is not less than 5% but not more than 20%, and the impregnating amount refers to the solid content of the waterproof weather-proof impregnating adhesive;
step five: and (3) water content control: the water content of the bamboo curtain after gum dipping is controlled below the temperature at which the waterproof weather-resistant gum cannot be solidified, the water content is controlled to be 8.2% -13.7%, the water content of the bamboo curtain close to the green bamboo curtain is measured to be a large value, the water content of the bamboo curtain close to the yellow bamboo curtain is measured to be a middle value, and the water content of the bamboo curtain close to the yellow bamboo curtain is measured to be a small value;
step six: spreading the bamboo curtain vertically and horizontally in a one-sided way: paving the long bamboo curtain to the other side by taking one side surface of the long side as a reference, symmetrically paving the long side and the middle side of the long side in the thickness direction, paving the bamboo curtain close to the green bamboo curtain on the surface layer, paving the bamboo curtain close to the green bamboo curtain in the longitudinal direction, paving the bamboo curtain close to the yellow bamboo curtain on the middle layer, paving the bamboo curtain close to the yellow bamboo curtain in the transverse direction, paving the bamboo curtain close to the yellow bamboo curtain on the core layer, and paving the bamboo curtain close to the yellow bamboo curtain in the longitudinal direction or the transverse direction, wherein the guard rail of the expressway is not suitable to adopt the bamboo curtain close to the yellow bamboo curtain, and the total paved layer is at least three layers;
or the bamboo curtain is paved transversely and centrally symmetrically: paving the two sides of the long bamboo curtain by taking the central line between the two long sides of the long bamboo curtain as a reference, symmetrically paving the long and short middle sides in the thickness direction, paving the bamboo curtain close to the bamboo green bamboo curtain on the surface layer, longitudinally paving the bamboo curtain close to the bamboo green bamboo curtain, paving the bamboo curtain close to the bamboo yellow bamboo curtain on the middle layer, transversely paving the bamboo curtain close to the bamboo yellow bamboo curtain, and longitudinally or transversely paving the bamboo curtain close to the bamboo yellow curtain, wherein the guard rail of the expressway is not suitable for adopting the bamboo curtain close to the bamboo yellow layer, and the total paved layers are at least three layers;
step seven: transverse progressive die pressing: placing the blanks paved in the step six on a male and female fixed steel die, compacting and positioning according to the paving standard in the step six, and then gradually compacting the male and female movable steel die matched with the male and female fixed steel die from the compacting and positioning position to the free end, gradually compacting from one side to the other side for one-side uniform paving, and gradually compacting from the center to the two sides for center symmetrical paving; four paving and molding modes are available: the two-waveform one-side-alignment paving and molding mode, the three-waveform one-side-alignment paving and molding mode, the two-waveform center-symmetrical paving and molding mode and the three-waveform center-symmetrical paving and molding mode are adopted; the two pressing modes of one-side paving and molding and central symmetry paving and molding are adopted, so that the longitudinal and transverse directions of the bamboo curtain can be fully stretched, deformed and mutually displaced in the pressing process of the mold, the phenomena of breakage and superposition of bamboo chips in the bamboo curtain are eliminated, and conditions are created for realizing ideal low-stress gluing and molding of the longitudinal and transverse bamboo curtain;
step eight: and (5) heating, solidifying and forming: heating and pressurizing in a mould, and determining specific forming temperature and time by combining the thickness of the guardrail blank according to the requirement of adopting the waterproof weather-proof adhesive type, wherein the average unit pressure is 3.8-25 MPa;
step nine: post-processing: and (3) carrying out post-processing on the compression molded product according to the requirements of the highway protective guard to obtain the bamboo highway protective guard.
2. The method for producing a bamboo highway protective fence according to claim 1, wherein the near-green bamboo chips refer to portions of bamboo not more than 1/4 of the wall thickness of the bamboo material that are free of non-glueable materials, the near-yellow bamboo chips refer to portions of bamboo not more than 1/3 of the wall thickness of the bamboo material that are near-yellow, and the near-green and near-yellow portions are portions of bamboo flesh.
3. The method for producing a bamboo highway protective fence according to claim 1, wherein the waterproof weather-proof impregnating adhesive has a molecular weight of not more than 300, an initial viscosity of not more than 15S and a surface tension of less than 34×10 -3 N/m modified phenolic resin glue.
4. The method for producing a bamboo highway protective fence according to claim 1, wherein the bamboo chips are divided into two types according to the lengths of the bamboo chips, one type is long bamboo chips, the length of the long bamboo chips exceeds the standard length by 20mm, and the other type is short bamboo chips, the length of the short bamboo chips exceeds the standard required material width by 30mm; the weaving width of the long bamboo chips exceeds 50mm of the arc-shaped length of the standard width of the protective guard, the weaving width of the short bamboo chips exceeds 40mm of the length of the protective guard, the distances among the single layers and the chips are smaller than a set threshold value, the widths are consistent, the weaving rope spacing is not more than 220mm, the same product is the minimum in weaving rope spacing of the near-bamboo green, the bamboo flesh is secondary, and the near-bamboo yellow is the maximum.
5. The method for producing a bamboo highway protective fence according to claim 1, wherein in the fourth step, the soaking method is adopted, preferably vacuum-followed high-pressure soaking, roll-in-glue or roller-compaction soaking.
6. The method of claim 1, wherein the strand has a thickness of no more than 0.13mm after being pressed at 10N/cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310438798.7A CN116175721A (en) | 2018-08-27 | 2018-08-27 | Production method of bamboo highway protective fence |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810979036.7A CN109129800A (en) | 2018-08-27 | 2018-08-27 | The production method of bamboo matter highway guard rail |
| CN202310438798.7A CN116175721A (en) | 2018-08-27 | 2018-08-27 | Production method of bamboo highway protective fence |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810979036.7A Division CN109129800A (en) | 2018-08-27 | 2018-08-27 | The production method of bamboo matter highway guard rail |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116175721A true CN116175721A (en) | 2023-05-30 |
Family
ID=64828095
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310438798.7A Pending CN116175721A (en) | 2018-08-27 | 2018-08-27 | Production method of bamboo highway protective fence |
| CN201810979036.7A Pending CN109129800A (en) | 2018-08-27 | 2018-08-27 | The production method of bamboo matter highway guard rail |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810979036.7A Pending CN109129800A (en) | 2018-08-27 | 2018-08-27 | The production method of bamboo matter highway guard rail |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN116175721A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112796257A (en) * | 2020-11-20 | 2021-05-14 | 浙江农林大学 | Bamboo wave beam plate |
| CN112692947A (en) * | 2020-12-11 | 2021-04-23 | 宣城宏宇竹业有限公司 | Waterproof light bamboo material for biomass traffic guardrail and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2736134Y (en) * | 2004-02-26 | 2005-10-26 | 曾祯祥 | Bamboo wood adhesive bonded panel |
| CN101036994A (en) * | 2007-05-15 | 2007-09-19 | 李坚华 | Laminated sheets of tabasheer core layer and the outer bamboo bottom layer and the processing method |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1136085C (en) * | 2000-03-08 | 2004-01-28 | 赵仁杰 | Making process of radial thin bamboo strip curtain composite board |
| CN1278827C (en) * | 2004-09-17 | 2006-10-11 | 中国林业科学研究院木材工业研究所 | Grading production method of bamboo laminated timber and its use |
| CN103148334B (en) * | 2013-03-13 | 2016-01-13 | 国际竹藤中心 | A kind of whole Zhang Huazhu restraints veneer and overlength bamboo bundle laminated veneer lumber |
| CN108000646B (en) * | 2017-11-23 | 2023-04-28 | 南京绿新能源研究院有限公司 | Method for manufacturing recombined bamboo product |
| CN108044744A (en) * | 2017-11-23 | 2018-05-18 | 南京绿新能源研究院有限公司 | Whole laying type random length restructuring bamboo profile and its manufacturing method |
-
2018
- 2018-08-27 CN CN202310438798.7A patent/CN116175721A/en active Pending
- 2018-08-27 CN CN201810979036.7A patent/CN109129800A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2736134Y (en) * | 2004-02-26 | 2005-10-26 | 曾祯祥 | Bamboo wood adhesive bonded panel |
| CN101036994A (en) * | 2007-05-15 | 2007-09-19 | 李坚华 | Laminated sheets of tabasheer core layer and the outer bamboo bottom layer and the processing method |
Non-Patent Citations (2)
| Title |
|---|
| 吴清一: "《中国托盘手册》", 31 May 2010, 中国物资出版社, pages: 152 - 153 * |
| 唐忠荣: "《人造板制造学》", 31 March 2015, 科学出版社, pages: 815 - 829 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109129800A (en) | 2019-01-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1200860C (en) | Container baseboard and producing method thereof | |
| CN108504085B (en) | Fiber reinforced polyurethane foaming synthetic sleeper and preparation method thereof | |
| CN104842593B (en) | Carbon fiber honeycomb and preparation method thereof | |
| CN116175721A (en) | Production method of bamboo highway protective fence | |
| CN102310450A (en) | Bamboo oriented shaving board and manufacturing method thereof | |
| CN103934867B (en) | The associating preheating hot-press method that large gauge bamboo recombined material is continuously shaped | |
| CN107234818A (en) | A kind of High Performance Thermoplastic Composites pyramid and X-type dot-matrix sandwich panel and preparation method thereof | |
| CN106363725A (en) | Manufacture method of cold compression recombination bamboo with random length | |
| CN104175613A (en) | Dimple-shaped honeycomb hollow plate and manufacturing method thereof | |
| CN102602112B (en) | Method for improving stability of a die-molded composite door panel | |
| CN107984581B (en) | Sawtooth-embedded-locking-structure flattened bamboo high-strength composite laminated plate and manufacturing method thereof | |
| CN107498656B (en) | Efficient production method of small-diameter wood composite material | |
| CN102431245A (en) | Plastic bamboo plate and production technology thereof | |
| CN204455726U (en) | A kind of novel high-strength high shear composite sleeper | |
| EP3904027A1 (en) | Assembled bamboo sleeper and preparation method therefor | |
| CN202389390U (en) | Glass fiber reinforced plastic sandwich outer cover at front end of railway vehicle | |
| CN115284405A (en) | Truck floor manufacturing process and product thereof | |
| CN102717410A (en) | All-bamboo plywood with novel structure | |
| CN108327015B (en) | Preparation method of bamboo veneer/fiber RTM molding sports skateboard | |
| CN202208164U (en) | Plastic-bamboo board | |
| CN104608209A (en) | Manufacturing method for universal bending glued bamboo laminate board | |
| CN101623892A (en) | Manufacture method of bamboo curtain sheets | |
| CN211368226U (en) | Sleeper material with high-strength bamboo structure made of bamboo and steel part glue | |
| CN110614681A (en) | Method for preparing composite staggered laminated timber by adopting bamboo laminated timber and standard timber | |
| CN204386109U (en) | The bamboo and wooden floor that a kind of low humidity is suitable for |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |