CS232004B1 - Method and apparatus for laboratory determination of lagge dust particles in granulation products - Google Patents
Method and apparatus for laboratory determination of lagge dust particles in granulation products Download PDFInfo
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- CS232004B1 CS232004B1 CS813843A CS384381A CS232004B1 CS 232004 B1 CS232004 B1 CS 232004B1 CS 813843 A CS813843 A CS 813843A CS 384381 A CS384381 A CS 384381A CS 232004 B1 CS232004 B1 CS 232004B1
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Abstract
Vynález je určený na labotatórne atanovenie prašnosti v granulátoch, ktoré obsahujú vlasce, šupinky a drobné úlomky granuliek. Cez rovnoměrně presypávanú vzorku granulátu aa nechá prefúkovat přúd vzduchu, pričom prachové částice zo vzorky ea zachytia na povrchu chlpatej tkaniny a množstvo zachvěného prachového podielu sa stanoví vážením. Zariadenie pozostáva z násypky s pozdížnou, pomocou uzatváracej doštičky regulovatelnou štrbinou a nádoby, ktorej jedná stená je tvořená eielkou na upevnenie chlpatej tkaniny a protilehlá stená je opatřená otvorom na odsávenie vzduchu. Možnosti použitia vynálezu v kontrolných fyzikálno-analytických laboratóriach vo výroba pri zpracovaní granulátu.The invention is intended to be labotatically dust control in granulates which include lines, scales, and tiny debris granules. Over evenly overflowing the granulate sample and allowed to puff air stream taking dust particles from samples and catch hairy on the surface fabrics and a lot of trembling dust the proportion is determined by weighing. Device it consists of a hopper with a longitudinal, aid closing plate adjustable through the slot and the vessel it is walling made up of a hair fastener the fabric and the opposite wall is provided air exhaust opening. Options the use of the invention in control physico-analytical laboratories in production in processing the granulate.
Description
Vynález sa týká spdsobu stanovenia vačších prachových častíc v granuláte a zariadenia na prevádzanie tohoto spdsobu, umožňujíce zachytenie volných vlascov, šupiniek a iných malých lípmkov z granll, ktoré sa vyskytuji v granulátoch polyetylénu aleboviných plastických látkách.The invention relates to the determination spdsobu larger dust particles in the granules and a device for converting the spdsobu, allowing the capture of free lines, and other small flakes of lípmkov granll to be present in the granules of polyethylene or other plastic.
Doteraz používané šitové triedenie granulátu má nevýhodu v tom, že vlasce a šupinky z polymérov mají jeden z troch rozmerov vačší ako je priemer otvorov v site, hoci ostatné dva rozměry sl menšie, tažko přepadávají, spriečujl sa v otvoroch šita a nevyskytuji sa v takom množstve, aby ich bolo možné oproti váhe a rozmerom šita spolahlivo zvážit.The sewn granulate sorting used hitherto has the disadvantage that the lines and scales of the polymers have one of three dimensions larger than the diameter of the sieve openings, although the other two dimensions are smaller, difficult to overflow, sewn in the seam openings and do not occur in such an amount so that they can be reliably weighed against the weight and dimensions of the suture.
Tieto nedostatky odstráňuje spdsob podlá vynálezu, ktorého podstata spočívá v tom, že granulát sa presypáva po chlpate j tkanině, cez ktorl sa presáva vzduch, pričom prachové částice vzorky sa zachytia na povrchu chlpatej tkaniny a množstvo zachytaného prachu sa stanoví vážením. Stanovenie prašnosti v granuláte podlá vynálezu je rýchlejšie ako delenie na sitách. Prašnost z granulátu je sustredená na ploché chlpate j tkaniny.These drawbacks are overcome by the method according to the invention, wherein the granulate is poured over the fluffy fabric through which air is passed, the dust particles of the sample being trapped on the surface of the fluffy fabric and the amount of dust collected is determined by weighing. The determination of dust in the granulate according to the invention is faster than sieving. The dust of the granulate is sustred on the flat hair of the fabric.
Stanovenie sa prevádza na zariadení, ktoré je znázorněné na priloženom výkrese. Na obr. 1. je znázorněný nárys a pa obr. 2. je bokorys. Nosná sietka 3 o šírke okolo 15 cm a výške okolo 20 cm je výhodné zhotovená z drótu a je uložená v pevnom ráme 4, ktorý má v hornéj časti niekolko upevňovacích trňov 9, na ktoré sa napíchnutím upevní chlpatá tkanina 5,. Upevnenie tkaniny na cell plochu nosnéj sietky sa stane po zapojení odsávania vzduchu. Chlpatá tkanina *> je zhotovená z materiálu, ktorý nepřijímá vzdušni vlhkost /s výhodou polypropylénové vlákna/. Nosná sietka s ramom je pevne připojenáThe determination is carried out on the device shown in the attached drawing. In FIG. 1 is a front view, and FIG. 2. is a side view. The carrying net 3 with a width of about 15 cm and a height of about 20 cm is preferably made of wire and is embedded in a rigid frame 4 having at the upper part a plurality of fastening pins 9 to which the hairy fabric 5 is stabbed. The fastening of the fabric to the cell surface of the carrying net happens after the air extraction is connected. The hairy fabric is made of a material that does not absorb air humidity (preferably polypropylene fibers). The carrying net with arm is firmly attached
232 OÚ ku odsávacej nádobě 2 polgul’ovitého alebo hranolovitého tvaru s odsávacím otvorom 10 vzduchu. Upevnovacie tyče 8 pevne připojené ku odsávacej nádobě 2 P° upevnění dvoma lapákmi na laboratórny stojan umožnia nastavenie vhodnej šikmej polohy tkaniny tak, aby granulát z násypky 1 po ploché tkaniny sa kotúlal alebo sypal. Granulát z násypky je prisypávaný pozdíŽnym otvorom, v ktorom je upevněná otačavá uzatvaracia doštič· ka 11 na prisypávanie granulátu pomocou regulačněj páčky 2. Násypka 1 musí mať objem aspoň na 0,5 kg granulátu a nemusí byť připevněná ku odsávacej nádobě 7. DÍžka hrdla násypky je o niekolko cm kratšia ako Sirka sieťky preto, aby sypaný granulát neodletoval cez okraje rámu do bokov a prach sa zachytával prevážne uprostřed chlpatej tkaniny. V o vzdialenosti niekolko cm od chlpatej tkaniny mdže byť umiestnený priehladný kryt 6 s niekolkými rovnoměrně rozmiestnenými otvormi na prúdenie presávaného vzduchu cez granulát ku tkanině. Vhodné je zariadenie na stanovenie prašnosti umiestniť nad nádobu, v ktorej sa zhromažóuje zosypaný granulát.232 OU to suction container 2 of semi-spherical or prismatic shape with air suction opening 10. The fastening bars 8 fixedly connected to the suction container 2 P ° fastened by two traps to the laboratory stand allow the appropriate inclined position of the fabric to be adjusted so that the granulate from the hopper 1 will roll or sprinkle onto the flat fabric. The hopper granulate is sprinkled through a longitudinal opening in which a rotatable closure plate 11 is mounted to feed the granulate by means of the control lever 2. The hopper 1 must have a volume of at least 0.5 kg of granulate and need not be attached to the suction container 7. it is a few cm shorter than the mesh width so that the loose granulate does not fly off the sides of the frame and the dust is collected mainly in the middle of the fluffy fabric. At a distance of a few centimeters from the fluffy fabric, a transparent cover 6 may be provided with several evenly spaced openings for flow of air through the granulate to the fabric. It is suitable to place the dust detection device above a container in which the loose granulate is collected.
Příklad prevedenia.Execution example.
Chlpatá tkanina sa odváži a upevní chlpatou stranou navrch na sieťku a zapne sa odsávanie vzduchu. Z násypky pri hornom okraji tkaniny sa prisýpa odvážené množstvo granulátu takou rýchlosťou, aby granulky vytvořili na povrchu tkaniny jedinú pohybujúcu sa vrstvu. Po vysýpaní granulátu nějaké zachytené prachové částice na stěnách násypky zotrieme plochou stěrkou a přiložíme na povrch chlpatéj tkaniny ku zachyteným prachovým čiastočkam. Chlpatá tkanina sa zloží najprv napoly do seba stranou so zacbytenými prachovými částicemi a potom l’ubovol’ne tak, aby bolo možné odváženie na laboratórnych analytických váhách. Zachytený prach v tkanině sa vysaje vysávačem a postup stanovenia sa opakuje.The hairy fabric is weighed and secured with the hairy side up on the mesh and air extraction is started. From the hopper at the upper edge of the fabric, a weighed amount of granulate is added at a rate such that the granules form a single moving layer on the fabric surface. After the granulate has been emptied, wipe off any trapped dust particles on the walls of the hopper with a flat spatula and place it on the surface of the fluffy cloth to the trapped dust particles. The fluffy fabric is first folded in half aside with dust particles in it and then freely allowed to be weighed on a laboratory analytical balance. The collected dust in the fabric is vacuum cleaned and the assay procedure repeated.
Spósob a zariadenie na stanovenie váčšíeh prachových čas tíc v granulátoch je možné využiť v medzioperačných a výstupných fyzikálno-analytických laboratoriach kde sa sleduje kva lita granulátu.The method and apparatus for determining the dust particle masses in the granulates can be used in inter-operation and outgoing physico-analytical laboratories where the granulate quality is monitored.
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Application Number | Priority Date | Filing Date | Title |
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CS813843A CS232004B1 (en) | 1981-05-25 | 1981-05-25 | Method and apparatus for laboratory determination of lagge dust particles in granulation products |
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CS813843A CS232004B1 (en) | 1981-05-25 | 1981-05-25 | Method and apparatus for laboratory determination of lagge dust particles in granulation products |
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CS384381A1 CS384381A1 (en) | 1984-05-14 |
CS232004B1 true CS232004B1 (en) | 1985-01-16 |
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CS813843A CS232004B1 (en) | 1981-05-25 | 1981-05-25 | Method and apparatus for laboratory determination of lagge dust particles in granulation products |
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1981
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