CS196878B1

CS196878B1 - Apparatus for continuous filtration of thermoplastic material melts

Info

Publication number: CS196878B1
Application number: CS850877A
Authority: CS
Inventors: Stefan Cuba; Amadeus Pechar; Stefan Rodak; Koloman Ondrejmiska; Miroslav Vrana
Original assignee: Stefan Cuba; Amadeus Pechar; Stefan Rodak; Koloman Ondrejmiska; Miroslav Vrana
Priority date: 1977-12-19
Filing date: 1977-12-19
Publication date: 1980-04-30

Description

(54) Zariadenie na kontinuitnú filtráciu tavenín termoplastických materiálov(54) Equipment for continuous filtration of melts of thermoplastic materials

Vynález rieši zariadenie na kontinuitnú filtráciu tavenín termoplastických materiálov s posuvným filtračným pásom alebo nekonečnou filtračnou slučkou, ktorý sa výhodné používá pri tvarovaní syntetických vláken, fólií a iných výrobkov z tavenín termoplastických materiálov.The invention provides a device for the continuous filtration of melts of thermoplastic materials with a sliding filter belt or an endless filter loop, which is advantageously used in the shaping of synthetic fibers, films and other products from melts of thermoplastic materials.

Známe kontinuitné filtre majú pod posúvaným filtračným pásom v prietokovom kanáli opornú podložku, ktorá má v priestore prietoku taveniny priebežné kanály a otvory kolmé k posunu filtračného pásu.The known continuous filters have a backing under the displaced filter belt in the flow channel, which has continuous channels and openings perpendicular to the displacement of the filter belt in the melt flow area.

Filtračný pás je tlakom filtrovanej taveniny termoplastického materiálu zatláčený do kanálikov, čím vzrastá odpor proti posuvu filtračného pásu a dochádza takto k jeho poškodeniu, a tým a) často k pretrhnutiu.The filter belt is pushed into the channels by the pressure of the filtered melt of the thermoplastic material, thereby increasing the resistance to displacement of the filter belt and thereby damaging it, and thus a) often tearing.

Kontinuitné filtre, pri ktorých má oporná doska pod posúvajúcim sa filtračným pásom, pozdížne drážky v smere pohybu po ne] sa posúvaného pásu odstraňuje nevýhody priebežných kanálikov, kolmých k posuvu filtračného pásu, ale nerieši maximálně využitie filtračně] plochy filtračného pásu'.Continuous filters, in which the backing plate below the displaced filter belt, have longitudinal grooves in the direction of travel along the displaced belt, eliminate the disadvantages of the continuous channels perpendicular to the displacement of the filter belt but do not solve the maximum utilization of the filtering surface of the filter belt.

Horeuvedené nedostatky rieši vynález tým, že zariadenie na kontinuitnú filtráciu tavenín termoplastických materiálov pozostávajú z filtračného telesa s prietokovým kanálom filtrovaného materiálu v celkovom profile prehradeným pohybujúcim sa filtračným pásom. Filtračný pás v prietokovom kanáli je podopretý perforovanou opornou doskou, ktorá má aspoň dve za sebou nasledujúce sústavy rovnoběžných drážok, orientovaných v směre posuvu filtračného pásu. Drážky v každej nasledujúcej sústave sú urobené aspoň čiastočne v pokračovaní rebra, vytvořeného medzi drážkami predchádzajúcej sústavy.The above drawbacks are solved by the invention in that the device for the continuous filtration of melts of thermoplastic materials consists of a filter body with a flow channel of the filtered material in the overall profile enclosed by a moving filter belt. The filter belt in the flow passage is supported by a perforated support plate having at least two consecutive sets of parallel grooves oriented in the direction of travel of the filter belt. The grooves in each subsequent assembly are made at least in part by continuing the rib formed between the grooves of the previous assembly.

Najvýhodnejšie riešenie je také, kde drážky nasledujúce j sústavy sú umiestnené v pokračovaní rebier predchádzajúcej sústavy a v priemere do jednej roviny, resp. sústav sa neprekrývajú a zapíňajú celu rovinu profilu prietokového kanála pre filtrovaný materiál. Týmto sa dosiahne maximálně využitie filtračného pásu a maximálně zníženie odporu filtračného pásu proti jeho posunu. Odpor voči posunu filtračného pásu je v značnej miere spósobený aj počtom priečnych hrán, ktoré musí posúvaný filtračný pás v dosledku preliačenia do drážok překonat. Pri pozdížnych drážkách, ak sú velmi úzké, je táto časť odporu vytvořená prakticky len hranou o dížke danej súčtom šírok jednotlivých drážok. U sústav drážok s optimálnym riešením aj z hfadiska využitia filtračného pásu, ako aj z hfadiska odporu voči posuvu bude horeuvedené riešenie najvýhodnejšie.The most preferred solution is where the grooves of the next assembly are located in the continuation of the ribs of the previous assembly and, on average, in one plane, respectively. the systems do not overlap and switch on the entire plane of the flow channel profile for the filtered material. This achieves maximum utilization of the filter belt and maximally reduces the resistance of the filter belt to displacement. The resistance to displacement of the filter belt is also largely due to the number of transverse edges that the displaced filter belt has to overcome due to the intersection into the grooves. In the case of longitudinal grooves, if they are very narrow, this part of the resistance is formed practically only by an edge of the length given by the sum of the widths of the individual grooves. In the case of groove systems with an optimum solution, both in terms of the use of the filter belt and in terms of resistance to displacement, the above solution is most advantageous.

196 878196 878

Příkladné vykonanle podlá vynálezu je na výkrese, kde představuje obr. 1 kontinuálně filtračně zariadenie, ktoré má opornú došku flltračného pásu, obr. 2 a 3 v pĎdoryse dva druhy urobenia oporných drážok pre filtračný pás charakterizované rozdlelnym počtom sústav drážok.An exemplary embodiment of the invention is shown in the drawing. 1 shows a continuous filtering device having a support of the filter belt; FIG. 2 and 3 show two types of support grooves for a filter belt characterized by a different number of groove assemblies.

Na obr. 1 je znázorněný priečny rez kontinuitným íiltračným zariadením podlá vynálezu, pri ktorom má filtračně teleso 10 priebežný prietokový kanál 12 prehradený posuvným filtračným pásom 20. Filtračný pás 20 v priestore prietokového kanála 12 je obmedzený z každej strany dvorná perforovanými rovnoběžnými platňami, a to vymedzujúcou platnou 30 a opornou doskou pre filtračný pás 20. Oporná doska je znázorněná v řeze rovnobežnom s drážkami a rebrami 42. Vzhladom na vzájomné posunutia drážok 41 a druhej sústavy oproti predchádzajúcej o pplovicu ich rozteče, rez prechádza v jednej sústave stredom drážky 41 v druhej sústave zase stredom rebra 42. Vo vykonaní podlá drážky 41 vyúsťujú na povrch opornej došky 40 sériou okrúhlych vítaní 50.In FIG. 1 is a cross-sectional view of a continuous filter device according to the invention, in which the filter body 10 has a continuous flow channel 12 through a sliding filter belt 20. The filter belt 20 in the space of the flow channel 12 is limited on each side by perforated parallel plates. and the support plate for the filter belt 20. The support plate is shown in cross section parallel to the grooves and ribs 42. Because of the relative displacement of the grooves 41 and the second assembly relative to the previous one by a half of their spacing, the cut passes in one system through the center of the groove 41 in the other. In the embodiment according to the groove 41, they result in a surface of the support thatch 40 by a series of round welcome 50.

Perforovaná vymedzovacia platňa 30 a oporná doska 40 filtračného pásu 20 ulahčujú navádzanie začiatku filtračného pásu 20 do zariadenia na kontinuitnú filtráciuThe perforated spacer plate 30 and the support plate 40 of the filter belt 20 facilitate the guidance of the beginning of the filter belt 20 to the continuous filtration device.

Claims

1 and 2 are continually two kinds of support grooves for a filter belt characterized by a different number of groove assemblies. FIG. Figure 1 is a cross-sectional view of a continuous filter device according to the invention, wherein the filter body 10 has a continuous flow channel 12 deflected by a sliding filter strip 20. The filter strip 20 in the flow passage space 12 is restricted from each side by a perfused parallel by a payment plate 30 and a support plate 40 for the filter belt 20. A support plate shown in cross section parallel to the grooves 41 and ribs 42. With respect to the relative displacements of the grooves 41 and the second system opposite the one half of their pitch, the cut passes. in the middle of the groove 41, in the second system, the central scrubber 42. In the execution of the groove step 41, the surface of the support plate 40 of the series is rounded out by 50. The perforated spacer plate 30 and the filter plate 40 of the filter belt 20 facilitate the guiding of the beginning of the filter belt 20 into the continuous machine. Filtration. \ t control for continuously fusing the melt-thermoplastic materials, consisting of a filter body with a flow channel of the filtered material in the entire profile of the overlapped moving filter pair, characterized in that the support plate (40) of the filter belt (20) in the flow channel (12) has at least two successive systems (A, B) of flow-through thermoplastic materials of the inventive stage. The flow channel 20 is connected to the supply line 11a and to the drain line 11b. FIG. 2 shows a support plate 40 in a section in which parallel grooves 41 are formed in two sets A and B, between which parallel ribs 42 are formed. The grooves 41 are connected by a bore 50 to the opposite side of the support dock 40. In Fig. 3, the support plate 40 is shown in the same way, in which parallel grooves 41 are disposed in three sets A, B and C, between through which the parallel ribs 42 with the width of the two grooves 41 are formed. In the following two assemblies Ba C, in the continuation of the preceding ribs 42, in each third of the width of the groove 41 the following is utilized, thereby utilizing the area of the moved filter web 20. In the examples, the most preferred embodiments of the invention are given, such that where the projections of the surface of the two notches of the following grooves do not overlap the filter tape, there may be instances where it would not be possible to overlap the displaced filter path with the grooves of the two systems. In conventional slots (41) oriented in the direction of displacement of the filter belt (20), the grooves (41) in each subsequent assembly being formed at least partially in the continuation of the ribs (42) formed between the grooves (41) of the previous system and the flat face they cover the entire filter profile of the flow channel (12). 3 drawings