انواع تسمه‌ها و نوار نقاله‌ها
تسمه یا نوار نقاله چیست ؟ تسمه یا نوار نقاله همه نام هایی هستند که برای انواع تسمه‌ها به کار میرود همه تسمه ها یا نوار نقاله ها با هم مشترکی باهم دارند آنها برای انتقال مواد یا وسایل یا قطعات تولید شده از یک نقطه به نقطه دیگر است ، استفاده از نوار نقاله بصورت صنعتی اولین بار در کارخانه فورد به وجود آمد که با پیشنهاد هنری فورد به منظور افزایش راندمان در تولید خودرو پیشنهاد خط های تولید پیوسته یا کانتینیوس پروداکشن (continus production) را داد .
در خط های تولید استفاده از نوار نقاله بهره وری و تولید را به شدت بالا میبرد به طوری که مواد و قطعات تولید شده به سرعت می تواند از از یک نقطه به نقطه دیگر کارگاه یا کارخانه انتقال پیدا کند ، این تنها یکی از کاربردهای نوار نقاله‌ها یا تسمه کانوایر یا نوار نقاله‌ها است
کاربرد تسمه یا نوار نقاله‌ها در صنعت
کاربرد تسمه‌ها یا نوار نقاله‌در جایی که قرار است محصول در معرض پروسس های تولید مانند قرار گرفتن در معرض حرارت به منظور خشک شدن استفاده میشود ، و ممکن است این پروسه ممکن است برای شستشوی قطعات و مواد تولید شده باشد و حتی ممکن است که ابزار یا قطعه ای را که برش خورده است یا هر فرآیند دیگری که روی آن صورت گرفته است را از یک نقطه به نقطه دیگر انتقال دهد و تمام این مراحل توسطتسمه کانوایر یا نوار نقاله‌ها انجام می شود ، که در ادامه توضیح داده خواهد شد که استفاده از خطوط نوار نقاله‌هادر معادن چقدر راندمان تولید را افزایش خواهد داد .
اصول کار تسمه نقاله چطوری است؟
بطور کلی تسمه‌ها یا نوار نقاله‌ها ، نواری است مداربسته یا کلوز لوپ (close loop) که با دریافت نیروی وارده از موتور گیربکس به کمک دو غلتک ابتدایی و انتهایی به حرکت درآمده و چرخه روتین و بی انتها در سیستم نقاله را به عهده میگیرد ، اگر بخواهیم یک مثال عینی و شهودی برای آن بزنیم از اساس کار تردمیل در باشگاه های ورزشی میتوانیم نام ببریم .
احتیاج به حمل و پردازش مواد متنوع در صنایع مختلف از جمله صنایع معدنی ، سیمان ، کاشی ، سنگ و صنایع دارویی و غذایی استفاده از نوار نقاله یا کانوایر را به شدت ضروری کرده است.
وجود طیف وسیعی از نوار نقاله‌ها و نوار کانوایر ها باعث شده است که صنعت داخل کشور قادر به تولید بسیاری ازانواع تسمه‌هاو نوار نقاله نباشد و که باعث شده است اکثر تسمه ها و نوار نقاله ها وارداتی باشد .
در این مقاله قصد داریم که انواع تسمه‌ها و نوار نقاله‌ها را با هم بررسی کنیم.
تسمه نقاله لاستیکی
تسمه نقاله‌های لاستیکی یا نوار نقاله لاستیکی از دو قسمت لاستیک و تار و پود ساخته شده است که لایه بالایی و زیرین آن پلاستیک و داخل آن از تار و پود استفاده شده است ،استفاده از تار و پود به منظور افزایش استحکام تسمه‌ها یا نوار نقاله‌ها بکار رفته است در تمامی نقاله های لاستیکی قسمت بالا و پایین تسمه یا نوار نقاله لاستیک پوشانده شده است بیشتر کاربرد نقاله لاستیکی در صنایع معدنی ، سنگ ، سیمان و فلزات و صنایعی که ارتباطی با مواد خوراکی ندارند مشاهده میشود .
تسمه‌های لاستیکی می تواند در دو نوع ساده و آجدار باشد نمونه ساده برای انتقال مواد یکسان به کار میرود و تسمه‌های نقاله لاستیکی آجدار بیشتر برای انتقال مواد معدنی در کار در معدن ها استفاده میشود.
تسمه نقاله pvc
تسمه‌های نقاله pvc همانطور که در بالا اشاره شد از تسمه‌های نقاله لاستیکی نوار نقاله لاستیکی در صنایع خوراکی نمی توان استفاده کرد و این محدودیت باعث شده که از تسمه نقاله‌ها pvc یا نوار نقاله‌ها pvc در صنایع خوراکی و بهداشتی به شدت استفاده گردد ، و علت آن سازگاری تسمه‌های پی وی سی در صنایع خوراکی و بهداشتی است این تسمه ها در انواع و سایزهای مختلف تولید می شود و همان طور که در بالا اشاره شد مداربسته یا کلوز لوپ (close loop) مورد استفاده قرار میگیرند تا بتوان مواد خوراکی و مواد بهداشتی را از یک نقطه به نقطه دیگر کارخانه انتقال بدهند.
بافت نخ موجود تسمه‌های نقاله pvc یا نوار نقاله pvc به طوری است که ستون های محکم و مستحکمی را در طول و عرض نوار ایجاد می کند .
تسمه نقاله pvc یا نوار نقاله pvc در دو نوع صاف و آجدار تولید می شود ، گاهی مشاهده می شود که برای جلوگیری از لغزش مواد و قطعات تولید شده در خطوط تولید از تسمه‌ها راهنما برای جلوگیری از لغزش آنها روی نوار نقاله‌ها استفاده شودکه باعث می شود پروفیل سایدبار یا T پروفیل مناسب برای شرایط مختلف محیطی باشد.
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