The Technological Process Of Bamboo Flattening & Softening And Development Of Pivotal Assembly Unit For Bamboo Flattening

In this paper,bamboo flattening was studied with chemical reagent,while optimal softening condition was determined.On this basis,critical bamboo flattening equipment was designed and manufactured.Research results are as follows:Bamboo softening:(1)The softening performance with Na OH,urea,ammonia was studied.The results showed that: Na OH was not suitable as bamboo flattened softener.The softening effect was poor and shallow when it was used as low concentration,while the bamboo was resolved when it was with high concentration.(2)Effect of ammonia – urea was studied when it is used as softening for bamboo.The softening effect stabilized when the urea concentration is above 40%.The higher concentration of urea could effectively reduce the number of cracks in bamboo with section.XRD analysis showed that with the increasing urea concentration,the degree of crystallinity of bamboo increased.FTIR analysis showed that,with the increase in urea concentration in the specimen hydroxyl(-OH)absorption peaks were gradually increased.(3)Temperature on softening effect is extremely significant,less affected by time and urea concentration.With the extension of the degree of crystallinity of bamboo cooking time first increased,after tend unchanged;when the cooking temperature higher than 80℃,softening effect improved significantly.Optimal softening process: after soaked in a solution of 6% aqueous ammonia and urea concentration of 40%,cooking time 5h,the cooking temperature is 95 ℃.(4)The effect of the softeners was more obvious for young bamboo and base of bamboo.the thickness of the bamboo will cause significant influence,when squeezing with the same depthRoller structure’s optimization for softening(1)On the basis of combining the use of bamboo flattening machine,flattening roller structure,its advantages and disadvantages were analyzed with the new design,and relevant design drawings finished.(2)Analysis of the bamboo blade roll flattening machine structure currently in use,points out the advantages and disadvantages presented his new design,to draw the relevant design drawings.(3)Bamboo flattening prototype trial-manufacture.According to design drawings,Bamboo flattening machine parts processing were fabricated and purchased.The machine was tested after assembly.