1.烘干
1. Drying
華鋒橡塑保送帶的引見(jiàn)，帆布進(jìn)壓延機(jī)之前都要烘干，烘干條件要在快速消費(fèi)時(shí)取樣測(cè)定帆布經(jīng)烘干后的含水宰來(lái)決議，請(qǐng)求烘干后的含水率為1%~3%，含水率超越時(shí)要進(jìn)步烘干溫度。
Experts of Huafeng Rubber and Plastic Belt introduced that canvas should be dried before it enters calender. The drying condition is to sample and determine the moisture content of canvas after drying when it is consumed rapidly. The water content of canvas after drying is requested to be 1%~3%, and the drying temperature should be improved when the moisture content exceeds.
2.粗煉與熱煉
2. Crushing and Heating
帆布擦膠、貼膠及壓膠片的膠料進(jìn)壓延機(jī)之前都要經(jīng)粗煉及熱煉。粗煉的工藝條件普通為前輥約50℃，后輥約45℃，膠片厚度不大于8mm，經(jīng)過(guò)輥簡(jiǎn)3次以上.熱煉的工藝條件普通為前輥溫度約為65℃，后輥約為60℃。膠片的膠種不同，輥溫要有調(diào)糧。膠片厚度不大于8mm,經(jīng)過(guò)輥簡(jiǎn)4次以上，使送到壓延機(jī)的膠料溫度穩(wěn)定，從而使壓延的膠片及貼膠厚度穩(wěn)定。
Canvas rubbing, gluing and pressing film must be roughened and heated before entering calender. Roughening process conditions are generally about 50 C for the front roll, 45 C for the back roll, no more than 8 mm for the film thickness, and more than three times for the roll. Hot smelting process conditions are generally about 65 C for the front roll and 60 C for the back roll. Different kinds of film, roll temperature should be adjusted. The thickness of film is not more than 8 mm, and the temperature of the compound sent to the calender is stable after four times of roll reduction, thus the thickness of calendered film and paste is stable.
3.擦膠
3. Rubbing
華鋒橡塑保送帶的引見(jiàn)，對(duì)未經(jīng)浸膠的棉帆布，保送帶廠通常是先擦膠然后再貼膠。擦膠通常在三輥壓延機(jī)上停止(圖2-24)，壓延機(jī)中輥涂有骨膠，使擦膠料只包中輥(骨膠溶在熱水中，涂輥后水分蒸發(fā)，骨膠就涂在輥簡(jiǎn)上)。
Huafeng rubber and plastic belts experts introduced that for non-dipped cotton canvas, the belts factory usually rubbed first and then glued. Rubbing usually stops on a three-roll calender (Fig. 2-24). The roller in the calender is coated with bone glue, so that the glue only covers the middle roll (the bone glue is dissolved in hot water, the water evaporates after the roll is coated, and the bone glue is coated on the roll slip).
擦膠過(guò)程是帆布經(jīng)烘干后進(jìn)入壓延機(jī)中下輥間，中輥速率較快，因此將擦膠料搓擦人帆布縫中成為擦膠布，未擦人布縫的膠料粘在輥筒上回到上中輥間的供膠處混合新的膠料后反復(fù)再停止擦膠。這些工藝請(qǐng)求膠料威氏可塑度0.55以上，配方有再生膠的，工藝上好操作，不易呈現(xiàn)外觀缺陷。沒(méi)有再生膠的膠料如白擦膠則可塑度請(qǐng)求更高一些。也請(qǐng)求進(jìn)粗煉時(shí)膠料的門(mén)尼焦燒時(shí)間為25~35min,以免膠料在擦膠時(shí)發(fā)作自硫及廢品帶布層欠硫。擦膠容易發(fā)作的質(zhì)量缺點(diǎn)如下。
Rubbing process is that canvas dries and enters the middle and lower rollers of calender. The middle rollers speed is faster. Therefore, rubbing rubbing rubbing rubbing rubbing rubbing rubbing rubbing rubbing rubbing rubbing rubbing rubbing rubbing rubbing rubbing rubbing rubbing rubbing rubbing rubbing rubbing rubbing rubbing rubbing rubbing rubbing rubbing rubbing rubbing Ru These processes require that the plasticity of the compound is above 0.55, the formula has regenerated rubber, the process is well operated, and the appearance defects are not easy to appear. No reclaimed rubber, such as white rubbing rubber, can require higher plasticity. It is also requested that the Mooney scorch time of rubber compound be 25-35 minutes during crushing to avoid self-sulfur in rubber rubbing and sulfur deficiency in waste tape cloth. The quality shortcomings of rubbing glue are as follows.
(1)露白即膠規(guī)劃部或大局部擦不上膠。保送帶的引見(jiàn)，發(fā)作這種狀況的緣由是多方面的，膠料可塑度低，帆布松緊不分歧惹起打折等都能夠惹起露白。處置辦法是在餌白處涂上與擦膠配方一樣的膠漿，干后才干運(yùn)用。
(1) When exposed, the glue planning department or most of the glue can not be erased. According to the experts of the belts, there are many reasons for this situation, such as low plasticity of rubber, no difference in canvas elasticity and discount. The disposal method is to coat the bait white with the same size as the formula of rubbing glue, and then use it after drying.
(2)壓破布邊緣由是帆布邊緊。處理辦法是要紡織廠設(shè)法處理。暫時(shí)的方法是剪破布邊或?qū)⒉歼吽谷ァ?/div>
(2) The edge of the crushed cloth is tightened by the edge of the canvas. The way to deal with it is for the textile mill to try to deal with it. The temporary way is to cut the edge of the cloth or go to the edge of the cloth.
(3)呈現(xiàn)自硫膠粒緣由有膠料焦燒時(shí)間短或輥簡(jiǎn)溫渡過(guò)高，處置辦法為：將自琉膠粒肅清，然后涂上與擦膠配方一樣的膠漿，干后才干進(jìn)入下工序。配方中不要運(yùn)用硫化臨界溫度低的促進(jìn)劑如TMTD，它的臨界溫度只要103℃，與擦膠工作溫度接近，很容易惹起膠料自硫。
(3) The reason of self-sulfur rubber particles is that the scorching time of rubber particles is short or the temperature of rollers is too high. The disposal method is to remove the self-sulfur rubber particles and then coat them with the same formula as the rubbing rubber, then dry them into the next process. The accelerator with low critical vulcanization temperature, such as TMTD, should not be used in the formulation. The critical vulcanization temperature of TMTD is only 103 C, which is close to the working temperature of rubbing rubber and can easily cause the self-sulfur of rubber compound.
(4)扒皮即中輥包膠部分或全部脫輥而貼在膠布上。保送帶的引見(jiàn)，緣由是骨膠涂得不好或中輥包輥膠厚渡過(guò)厚。應(yīng)重新涂骨膠，扒皮膠布用溶劑將包膠片扒下來(lái)，再涂上同配方的膠漿，干后才干進(jìn)人下工序。
(4) Skin scraping means that the middle roll is partially or totally rolled off and pasted on the rubber cloth. The experts of the belt introduced that the reason was that the bone glue was poorly coated or the rubber thickness of the roll was too thick. Bone glue should be re-coated, the stripped rubber cloth should be stripped off with solvent, then coated with the same formula of mortar, dry before entering the next process.
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