DE1911601A1 - Method and device for fine flow metering - Google Patents

Description

Patent engineer 1 91 I 6 O HERMANN L. JUNQ 757 bathe-bathe DipL-Chem. Ιο *** »*» «« * 12

Telephone (07221) 23933 Telegrams: JUPAT Baden-Baden

Your sign my sign day

1969

O.B.668

Method and device for

The invention relates to a method for fine straw dosing on Saokfüllmasehinen with a closure, which is controlled depending on the filling weight ο

Devices of this type are already known ₉ in which the product flow to be weighed is separated into a main flow and a fine flow in order to reduce the differences between the target weight and the actual weight. However, these guidelines have the disadvantage that the performance is considerably reduced as a result and, moreover, it is not always possible to limit the inflow in the case of different properties of the items to be cleaned

The invention is based on the object _F to avoid these Hachteila, and create a dosing and filling apparatus au "with the abgefüllts weight can be maintained accurately and reproducibly as possible"

009838/1133

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The solution to this problem is? u-lttels elnea diaphragm valve, which on the fixed part of the filling machine is arranged, the cross-section of the filling pipe is reduced to reach the target weight of a package and is completely closed when the filling weight is reached ο

The gate direction for carrying out this method is advantageously that a second, smaller downpipe with a smaller cross-section is arranged in a large cladding tube and both cladding tubes have a Meabran closure.

The advantage of this device is that the oils Formation according to the invention when filling powdery, gas-containing products, a large part of the gauzy! order medium can be retained. so that the filled sack contains less gas. Cash yield once <=, »- Possibility to save packaging material, because smaller bags with almost the same dimensions can be used and on the other hand the filling voT * - gaog can be accelerated considerably ^

In the drawings, for example, there are specifications of the Invention shown, namely

1 shows an embodiment in an open pen 2, the embodiment oach pig 1 in FIG

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3 shows the device according to FIG. 1 in a completely closed state

Fig. 4- Another embodiment in open condition Pig _o 5 the version according to PIg o 4 in Peinstromeiaat position 6 the version according to PIg ₃ 4 in the closed state

009838/1133

According to the Pig. 1-3 eats the downpipe 11 connected to the shut-off device 13 by a flexible hose 12 _f daa ■ is connected to the filling device 14 on the one hand ο

A small downpipe 15 is arranged in the large jacket tube 11, which also continues via a hose 16 with an extension 17 extending through the closure device 13 and with a further closure device 18 attached to the end of this extension fixed part of the filling machine and consist λ of so-called membrane valves, in which an elastic, smart membrane 19 is deformed by hydraulic or pneumatic pressure until either the elastic parts 19 touch or until they rest against a valve seat. The valve seat 20 now exists for the large filling tube 11 from a sealing seat, which is attached to the extension 17 of the small filling tube 15 and is concave. The twisted seat 20 has transitions at both ends with a small jacket tube 17

At the beginning of the filling of a bag 22, both closures 13 and 18 are open, so that as shown in Fig. 1, the entire cross section of the downpipe 11 for the flow of the |

Filling goods are available «So that they are at the sealing seat 20 no filling material can settle, the transitions 21 are provided Shortly before the target weight is reached, the membrane 19 of the closure 13 is inflated by overpressure to such an extent that the membrane 19 rests against the sealing seat 20 in a sealing manner, as shown in FIG. As a print medium If hydraulic fluid or air are used here, which

is controlled by valves not shown »By this closure of the large filling tube remains for the supply of the filling material only the small cross-section of the small * üllrohres 15 available "The resulting fine flow now flows until the target weight in

009838/1133 -a ~

Sack 22 is reached "whereupon the closure 18 by opening = the membrane 19 is closed so that it touches one another. This is shown in FIG

The advantage of this device is that practically the filling of the sack with the bulk of the filling material full cross-section of the large filling tube 11 is available, whereas the simple diaphragm valve 13 briefly reduces the cross-section to the small one Filling pipe 15 possible

According to Figo 4-6, the filling consists of a large casing tube 41 ₉ which is connected via a known hose .42 with the closure 43, which in turn is connected to the filling device 44 is _o The closure 43 consists here only of a diaphragm valve 45 "which is connected to a pressure generator via control valves o

For filling of the bag 22 dervolle cross-section is also here again the large filling tube 41 for Verfügungc Shortly before reaching the target weight is in the membrane »valves 45 so much pressure input in that the passage cross section is substantially reduced 46 at this point _p where as shown in Figo 5 As a result, a fine flow of the filling material is obtained with which the actual weight of the bag 22 can be relatively easily adjusted to the target weight by applying further pressure to the membrane 45 when the target weight is reached, so that it completely blocks the flow _f blocks of Fig 6 _c "control of the pressure is applied here in a known manner of control valves, and can be automatically performed depending on the weight * the advantage of this is that _{iänrichtung?} that the cross-section reduction ■ for the production of the fine stream can be adjusted as a function of the particle size j flowability etc _{o of} the filling material, so that optimal conditions are always present

Claims 009838/1133 '~ T "- ~

Claims (1)

Claims 1 ο method for Peinstrom-Dosing of Füllmascainen m ¹ '; a closure which is controlled as a function of the filling weight _s characterized in that by means of a membrane valve which is arranged on the fixed part of the Ullmaohine _p the cross section of the filling pipe (11g 41) is reduced shortly before the target weight of a package is reached and at Reaching the filling weight is completely closed " 2 ₀ device wet the method according to claim 1, characterized in that in the large filling tube (11) a second Λ small jacket tube (I5) with a small cross-section is arranged and both downpipes each have a membrane seal (13 »18), 3 ο device according to claim 2 _f characterized _v that in the region dea closure (13) for the large fill tube f 1 ί) on the small ffuilrohr (17) ^ maybe fitting (attached to 20) for the closure membrane (19) is ο 4ο Device according to claim 2 and 3 »characterized ρ that the sealing seat (20) at its ends has a continuous transition (21) to the small filling pipe (17) ' _o 5 ο Device according to method _{claim 1 s,} characterized in that the membrane closure (43) is controlled by valves known from 3ica first into a position with a reduced passage cross-section (46) and then into a complete shut-off position 009838/1133