DE1914942A1 - Method for closing the valve openings of valve bags by means of an adhesive and device for carrying out the method - Google Patents

Description

PATINTANWXLTB J.

DR. CLAUS RE1NLÄNDIR IMPL- ING. KLAUS BERNHAROT

p.JMONCHSN «1914942

IACKESSTRAHi 1

Skogsägarnas Industri Aktiebolag, Strömsnäsbruk, Sweden

Method for closing the valve openings of valve bags by means of an adhesive and device for execution of the procedure

The present invention relates to a method for closing the valve openings of valve bags as well as a device for carrying out the process

The purpose of the present invention is partly to prevent unauthorized removal of what is packaged in such sacks Filling material and partly the creation of a moisture-proof valve closure

For this purpose, the attachment of a suitable Adhesive has been suggested inside the valve after the filling operation is complete · The adhesive was hereby using a pressure source using a spray nozzle insertable into the valve opening through the open end of the valve performed*

However, it has been shown that such devices must have a relatively long spray nozzle and thereby a certain, undesirable dripping of the adhesive carry with them during insertion into the valve opening and, in addition, do not allow easy cleaning of the device.

original

$ 90 845/0926 .; ,. ·

Copf

Ci 1314942

The above disadvantages of previously known devices can now be completely eliminated according to the invention and that proposed method is mainly characterized by that the valve bag, which is arranged with the valve on a filler pipe, is filled with at least one opening communicating with the interior of the valve is provided, whereafter the adhesive mass passes through the opening thus formed is introduced into the valve and the latter is compressed by the pressure of the filling material after removal of the filling pipe and is closed

The above method can be conveniently carried out with a device are executed, which mainly consist of a vertically adjustable housing on the filling pipe with at least one from the bottom of the housing in the direction of the filling tube outstanding punching element consists, the punching element for producing a with the inside of the valve communicating opening through a recess present in a lip-shaped extension of the filling tube is performed and the interior of the punching element with an adhesive applicator for the purpose of introducing the adhesive into the Valve is connected

According to an expedient embodiment of the invention every punching element is provided with a> tial hole, de * - ien surface facing away from the working surface of the punching element opens into an extension which comprises a stationary organ provided for the application of the adhesive, wherein between this organ and the enlargement one at a pressure. There is a gap-shaped space that can be connected to the air source and the organ is provided with an internal space, the communication of which with the bore is regulated by a needle valve.

The invention is described in more detail below with reference to the accompanying drawing.

Fig. 1 shows a schematic view of one for the execution appropriate device of the present procedure,

2 shows the punching element of the device shown in FIG. 1 on an enlarged scale, and FIG

3 shows a longitudinal section through a further embodiment of the punching element.

19H9A2

1 with a valve bag is referred to, which with'seinem valve

2 is pushed onto a filling pipe 3 in a known manner · The the front end of the filling tube 3, which is in the direction of the valve sack, opens into a lip 4 which extends against the upper surface of valve 2 is in contact · Above the filling pipe

3 an adhesive applicator 5 is arranged, which consists of a housing 6 is provided with punching organs 7 fixed on the underside facing the filling tube 3. The punching organs 7 are provided with an elongated, inner bore 8 provided »This bore 8 widens in its side facing away from the filling tube 3 to Receipt of an organ 9 provided for the supply of adhesive in such a way that a gap-shaped space 10 between the organ 9 and the mentioned enlargement is formed »The gap-shaped space 10 is equipped with valves Lines 11 in connection with a compressed air source, not shown. The extending in the extension applicator member 9 is provided with an inner gap 12 which is in a Tip 13 opens out, this tip cooperating with a needle valve 14 which is arranged such that it can be displaced aerial in the gap 12. The needle valve is connected to a rod 15 protruding from the top of the housing 6 and to a cross rod 16 is firmly connected · The gap-shaped space 12 is provided with adhesive mass through the lines It · Ylie As can be clearly seen from Fig. 2, the device is three equipped with various punches 7 "In the housing 6 two lifting members 18 a" b * ial slidably mounted in the Housing 6 existing bores · Each of these lifting members 18 comprises a "protruding from the underside of the housing, spring-loaded piston 19, the piston rod 20 from the top 6 protrudes from the housing and is firmly connected to the cross rod 16.

In the lip 4 facing the underside 6 of the housing the filling tube 3 has a number of openings 21 which correspond to the number of punching elements t, and preferably something have a larger diameter than the punching elements 7.

The housing 6 is mltfrfci * two control rods 22,23 and a cylinder 24 arranged vertically adjustable

909845/0926

19U942

In the embodiment shown in FIG. 2, the punching elements 7 are provided with a continuous a * 4 * oval bore. As can be seen from FIG receive the punched · can For this purpose, the punch mechanism 7 can see with one, communicating with the inner bore side opening 26 _t in such angle ial against a £ i ** bore is arranged »that the glue jet towards the interior of the valve, in near the cut-out, is straightened

The mode of operation of the device shown is as follows! After completion of the actual filling process, the Housing 6 moved downwards in the direction of the filling pipe 3 Here the air supply to the gaps 11 is opened and the same *

early the needle valves 14 are brought to tight contact against the pointed extensions of the gaps 12 * With the continued movement of the housing 6 in the direction of the filling tube 3, the punching elements 7 are inserted into corresponding openings 21 of the lip 4 of the filling tube 3 »with holes or Off * openings are punched out in the valve wall and the front end of the punching element lies within the valve 2 thus lies the underside of the / housing. '6 _: £ * ■?' / Gen the «1t the filling tube" 3 'lq $ j' m & M. Vdlf 'piston 19 of the lifting organs 18 are located in the housing 6, whereby the upper rod 16 is also lifted dit tfadulvinti ·! «JL4 -fiutVihr he" will be sealing "Hereby the In den 6pait * is; _; The holes 8 are introduced into the material; and you ^ eir'äeii pifti * ' stroiB / ztim inntr «n of the valve * i« i ^ er shown in ^ i ^ * ^ * "Äutführungfor" tine certain glue \ ^ Qf | rafe | tg "5 ^ dta , the Ofiiwngtri 21 gefiübe ^ lifigendeb-inntolS ^ lieii d # s tile; 2 eyes and at dmt in ^ Fig # 3 -shown'M & läh ^ form 7- ci-Jfttchleht the glue supply lh more directly to the punched holes * hiIe from the drawings -hit happens *

909845/0926

ς 19U942

the punching elements 7 are designed so that no direct punching out of holes is achieved, but only one when punching Tab 25 arises, which when the punching elements 7 are pulled out, i.e. when the housing is returned to the original position, at least partially springs back and results in a certain seal of the openings achieved at the beginning. When moving the Housing 6, a retreat of the needle valves 14 into their sealing starting positions is achieved in that the pistons 19 are released and, due to their spring load, take up their original positions protruding from the housing 6 again, whereby the cross bar 16 is returned to its original position

The present invention thus achieves an application of adhesive inside the valve without the risk of dripping and at the same time a control can be carried out in the simplest possible way Possibilities for fine adjustment of the different time intervals between the punching operation, supply of the amount of glue and supply of air, since these functions are controlled in a simple manner by valve devices present in the housing can be.

The present invention is not yet limited to the Drawings described embodiments limited, but can be varied in various ways within the scope of the following claims

It was also found that the present invention is particularly advantageous for the use of warmed-up Adhesive compounds can be used · By using such adhesive compounds one can completely Achieve a vapor-tight seal, especially for those sensitive to moisture Substances is appropriate.

909845/0926

Claims (4)

19H9A2 Claims A method for closing the valve ports of valve bags by means of an adhesive composition, the adhesive composition is mounted in the filled state of the bag within the valve, characterized gekennzeichne t _r that with its valve on egg γ * μ | arranged Ξ infüll = pipe valve bag in the filled state with at least one opening communicating with the inside of the valve is provided, after which the adhesive mass is introduced into the valve through the opening formed in this way and the valve is compressed by the pressure of the filling material after it is removed from the filling pipe and thus closes automatically. 2. The method according to claim 1, characterized in that that the opening provided for the introduction of the adhesive mass is punched out 3 · Method according to claims 1-2, characterized in that the punching out the Opening provided organ is used at the same time as an applicator for the adhesive mass 4. Device for carrying out the method according to the Claims 1-3, characterized by a housing (6) arranged vertically adjustable on the filling pipe (3) with at least one from the Uater side of the housing to the fill pipe (3) excellent punching element (7), which is present in a lip-shaped extension (4) of the filling tube (3) Recess (21) cooperates. And is connected to an adhesive applicator « 5 · Device according to claim 4, characterized t that each punching element (7) has an a-e & s-iale bore (8), de »» en from the work surface of the punching element (7) facing away from the end opens into an extension for receiving a vorgesshens ^ n for the adhesive supply stationary <KOrgani (9), and that between the organ (9) and the Expansion of a later, connectable to a compressed air source 909845/0926 19H942 shaped space (10) is present and the organ (9) with a Interior (12) is provided whose communication fiiit the Bore (8) is regulated by a needle valve 6 · Device according to claim 5, characterized in that » that the inner space (12) is provided with adhesive compound by lines 7 * Device according to claim 5, characterized in that indicates that the needle valve (14) is in the housing (6) is mounted aetf-ial displaceably by a rod (15) and the end of the rod (15) protruding from the top of the housing (6) is firmly connected to a transverse rod (16). 8 · Device according to claims 4-7, characterized in that each needle valve (14) of at least one in the housing (6) a <** ial displaceably arranged $> L lifting device (18) with one from the underside of the housing (6), against the filling tube (3) protruding spring-loaded piston (19) is controlled, whereby the piston (19) with its piston rod (20) from the top of the housing (6) protrudes and is connected to the crossbar (16) in this way is that the lifting member (18) at a predetermined stroke length is brought to rest against the filling tube (3) and in doing so, use the cross rod (13) to open the needle valve (l4) lifts its sealing layer 9 # device according to claims. "7 ·, characterized in that the working surface of the punch-organ for the manufacture of a" sfihräggösteiltist with the valve bag associated tab (25) * - -. 4 _ OK # device according eggs * claims S - 9 ,, d & du ac c H g e k e η η ζ e i c h η i.tj that äts Stan ζ organ (t) wit finer continuous aö * »iale bore (8) is provided» 11 «Apparatus according to ^ ^ NSPR chen 5 - 9 * di a ύ υ rch ·· gekennzeich rt et _t that the 5tanzorgan (7) wit a provided with the hole (8) koii ^ nizi * £ * ftdiö ^ page.n «f | huftg (36) | which is slightly inclined to the "HprikoniaJL ^ bene · ' 12 ♦ Device according to one or more of the preceding ". the claims, thereby k je π η ζ eigh η B t, ■ [ 909845/0926. _BA d original 19H942 that the device has three punching organs and two lifting devices comprises, the protruding from the top of the housing (6) Bars of all organs are firmly connected to the cross bar (16) 909845/092 G bad ORIGINAL Empty soap