KR960013292B1 - System and apparatus of making and filling a flexible sanitized bag - Google Patents

Abstract

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Description

Systems and devices for manufacturing and filling flexible and disinfectable bags

1 is a block diagram of the overall method.

2a is a dynamic diagram corresponding to the schematic diagram of FIG.

FIG. 3a and 3b show one valve form in cross section and plan view (FIG. 3b).

4a and 4b show a cross section and a plan view of one reinforcing ring AR (Fig. 4b).

5a, 5b and 5c show a bag with two valves and one ring according to the invention in front view (figure 5a), cross section (figure 5b) and longitudinal section (figure 5c) .

6a and 6b show two sacks, in which a valve and a ring according to the present invention are supplied to each sachet, in a front view and a cross-sectional view (A-A).

7A, 7B and 7C show the ring application system as a front view (FIG. 7A), a top view (FIG. 7B) and a side view (7C).

* Explanation of symbols for main parts of the drawings

1: Film Supply Zone 2: Film Marking and Winding Zone

3: film washing zone 3 ': maltjet

4: film processing zone 5: bag manufacturing and filling zone

6: Bag collection and test zone 6 ': Bag cutting zone

7: packing area 7 ': packed sacks

10: pump 10 ': cock

12, Fi: filter 31: composite

31 ': home 32,42: crown

33: elastic 34: lower ring

35: upper body 36: concave marks

41: rib 50: edge

71: vibration tank 72: channel

2a: marking step 2b: winding step

3a: ultrasonic vibration washing step 3b: water jet washing step

4a: drying step 4b: stacking step

4c: UV sterilization step 4d: Film alignment step

4e: folding step 4f: towing step

5a: Vertical welding step 5b, 5b ': Valve application step

5c: Film marking step 5d: Horizontal welding step

5e: Cutting step 5f: Reinforcing ring application step

5r: Bag filling step 6a: Bag collecting step

6b: test step 7a: covering the skin

7a ': reinforcement step 7b: alignment step

4a ': Pressing roller 4b': Winding roller

4c ', 4e'4'e': Roller 4d ': Alignment Roller

4f ': Traction roller 5a': Vertical welding device

5b: Valve Applicator 5b '' ': Valve Applicator

5c ': film marking device 5d': horizontal welding device

5e ': Cutting means 5f': Ring welding part

5f: Ring application device 6a ': Bag collection device

6b ': Bag testing machine AR, AR', AR '': Reinforcement ring

B, B'B '': Bobbin DOS: Batch Pump

F: Film FE: Outer Film

I: Injection system L1-L2: Longitudinal weld

L, L ', L, TT: Line Ny: Polyamide

PP: Polypropylene PI: Folded

PEB: Butane-containing polyethylene PROG: Program device

S: Sack SP: Charged Sack

SV: Empty Bag SA, US: Ultrasonic Vibration Welding Machine

SUP: Support STO: Storage Tank

NT: Conveyor Belt V1, V2, VA, VB: Valve

The present invention relates to an improved system for making bags of flexible material and at the same time filling liquids such as sparging solutions. In this system, the film is unwound from at least one bobbin, which is several times as wide as the finished bag, and then wound, followed by a first washing step by means of ultrasonic vibration and a second washing step by means of water jet. Get a wash treatment.

After washing, they are dried, cold and UV sterilized and the film is bent at 270 ° -angles and marked after welding, filling and valve application under traction control.

Subsequent collection and testing of these labeled and filled sacks is preferably carried out by partial reinforcement of their edges or by vacuum packing into the inside of the outer shell.

Moreover, the present invention includes an improved apparatus, which comprises: a film feed zone comprising a film dispensing device equipped with a brake device for controlling the elongation of the film: a washing tank by means of ultrasonic vibration and partial recovery and continuous A washing zone comprising a washing tank by means of a water jet supplied by a closed system using distilled water to be filtered; A treatment zone equipped with a film alignment device for precisely advancing the 270 ° -bending prism, drying and winding rollers; Filling sacks with solution using a double filling pipe, and the second pipe is used to replace air with inert gas during the final sealing of the sacks. Manufacturing and filling zones: using a conveyor belt in which the final sacks move in line with the main conveyor belt. Completeness test in the test solution, the second conveyor belt is characterized in that it comprises a conveyor belt subjected to an adjustable pressure on the bag during the passage of the bag.

Similar systems with related devices are disclosed in Applicant's U.S. Patent 4,656,813. The system produces excellent results and at the same time shows a wide range of other possible improvements.

Continuing the research, we surprisingly found that the system became more broad, clear and universal, at least by adding the following parts:

1) a small hole punching step for applying a reinforcing ring made of plastic and simultaneously simultaneously punching the film;

2) if necessary, acting on the second supplementary bell portion;

3) preparing the same but empty bag after connecting the first bag along the edge after providing the small hole and valve as described above;

4) welding the bag at a constant welding temperature in the range of 125-130 ° C. using a pulse with automatically adjusted intensity;

5) Applying valves and rings by means of ultrasonic vibration with a frequency of 20-21 KHz while compressing the components to be welded onto the film at a fixed pressure.

Steps 1 to 3 may be performed in any order, but may be performed in a different order as described and indicated in the following description.

Referring to Figures 1 and 2a, the system according to the present invention is represented by at least five zones, each of which performs one or more processes. In particular, the zone 1 represents the feed zone of the film F unscrewed from the bobbin B, wherein the rectangular parallelepiped is at least one parallel to the first bomin B in the zone 1 and having the same width. It is possible to arrange the bobbin B having a width of n- times the width of the second bobbin B 'or B or B'.

The unwinding roller is combined with an elongation control device including a brake device (DF); Zone 2 represents the marking step 2a and the winding step 2b of the bobbin B and / or film F coming from (B ′) or (B); Zone 3 represents a washing step wherein film F is applied to distilled water sprayed by water jet 3 ′ fed from pump 10 via first ultrasonic vibratory washing step 3 a and filter 12. By a washing step 3b and each pump 10 is connected to a source of distilled water by means of a valve or cock 10 '(Fig. 2a). Preferably the supply of distilled water described above forms a closed system and comprises partial liquid recovery means.

When using multiple bobbins (B, B ', etc.) having the same width or bobbins (B) having the same width n-fold as the previous one, the zones (2 and 3) can propel multiple films simultaneously. ; Zone 4 shows the film treatment in six stages. Drying step 4a; stacking step 4b; sterilization step 4c by uv means; alignment step 4d; folding step 4e and towing step 4f.

FIG. 2a shows a pair of pressing rollers 4a ', a conventional series of winding rollers 4b', a roller 4c 'in combination with an UV-lamp, an alignment roller 4d' and a roller 4e '. It shows a means comprising a traction roller 4f 'that works with the folding prism PR and the second folding roller 4'e'. The zones 5 each represent a step of manufacturing a well equipped with a valve and a support ring while simultaneously filling the bag described above; the second step 5a is a longitudinal welding step of the bag, and 5b is a first valve. (VA) the application step; (5 ') is the application step of the second valve (VB); (5c) is the marking step of the film for the engraving of the effective water; 5d is a transverse welding step of the bag perpendicular to the first welding; And (5f) shows the application step of the reinforcing ring. Preferably step 5R comprising bag filling takes place between steps 5c and 5d by injection of the solution S from the storage tank STO consisting of ash pump (DOS) means. This injection is advantageously programmed by means of a suitable system comprising a programming device (PROG) and valves (V1 and V2), for example filling only the rider's sacks in turn and 121 ° C of the rain-filled sacks. Maintain or empty only the small batch of solution necessary for steam sterilization. After filling the bag with a batch of liquid, a small amount of nitrogen from the source N2 is injected through the filter Fi into the upper head of the filled stream.

To date, the application of reinforcement rings (AR) is achieved by means of aluminum ring attachment means (mainly in bags with capacities of 1 liter or more) on bags already finished and filled outside the machine prior to sterilization. It causes many defects such as dimensionality, low reliability and so on.

According to the main feature of the present invention, the above mentioned reinforcement ring AR is applied in the step 5f of purifying, during bag making and filling, and for this purpose ring holder, conveying and stationary channel and actual application device inside the machine. The ring is welded to the bag and the film is punched at the same time so that the ring is welded on the film in the restricted portion by the ring itself.

An advantageous form of the reinforcing ring AR, shown in FIGS. 4a and 4b, is to have a crown 42 welded to the bag body S and a rib 41 of increasing thickness towards the bottom.

In a similar manner the valves VA and VB preferably comprise a composite 31 which terminates at the bottom with a crown 32 to be welded to the magnetic flux S. The composite 31 has a groove 31 ′ and a lower ring 34 with an elastic body 33 inserted therebetween. The upper body 35 forms a valve handle that facilitates punching along the recess 36 by means of a punching tool (not shown). Similar valves are described in Applicant's European Patent Application No. 0144746. Preferred forms show (31,32,34,35,36) of valve (V) made of polypropylene with or without ring AR and other small amounts of olefins. The bag S shown in figures 5a, 5b and 5c is a central body with two longitudinal welds L1-L2, an upper transverse weld ST, at least one ring AR and at least a valve VA (and And / or a double edge 50 into which the fold PI to which the crown 32 of VB is welded is introduced. This bag is a triple dried form comprising an inner layer of polymer PP (PEB) containing an outer layer of polymeric PP, an intermediate polyamide (Ny) layer and a small amount of butanes, as described in U.S. Patent No. 4,326,574 to the applicant. to be.

In addition, according to the Applicant's recent patent application, the triple-dried portion may always have a layer (PEB) therein, but the intermediate layer may be made of polyester or unoriented polyamide or polypropylene with natural polymer intercalated. On the other hand, the outermost layer can be made of polypropylene or coextruded polypropylene with natural polymer inserted.

7a, 7b and 7c diagrammatically show at least one ring (AR) application system, which is injected by vibrating tank 71 and descends across channel 72 to ring weld 5f '. Arrived here, under the action of the ultrasonic vibration welding machine SA.US and the opposite support SUP, AR is fixed to the outer film FE of the bag S.

As described above, it is possible to supply the second valve VB to the bag S, which enables the universal, more functional, simple and practical use of the bag S in a wide range of conditions of use ( For example, the punching mechanism and the punching by the addition / removal of the needle before or during use), the first valve (VA) may be different.

After filling and manufacturing the bag S, the second valve VB is installed inside the machine equipped with the second valve holder, the second supply and positioning channel second welding window, or the first valve application device 5b. ) The application device 5b 'is equipped, and the solution of this shift enables improvement of the advanced technology described later without causing a failure due to the high production rate of the machine itself.

The loosening, feeding and welding device of the second valley portion may be substantially similar in principle to the device described in FIGS. 7A-7C with respect to the reinforcing ring AR.

According to a third important feature of the invention, by means of a suitable system, for example, only bags corresponding to radix sequences are filled and bags corresponding to even sequences are sterilized with minimal ash for the purpose of complete sterilization at a temperature of 121 ° C. It is possible to program bag making to fill or empty the filling. Two neighboring sacks with common edges connected to each other form a double-sack system (the first one is filled and the second one is empty) (Figure 6a), which can be carried out outside the machine using other machines up to now. Several steps that result in waste of labor and labor can be carried out inside the machine and can be easily packed in the pavement area 7.

6A and 6B show the bag SP (filled) connected to the empty bag SV along the connecting line 66. This double bag can be manufactured simply using PROG (Fig. 2a), which is the first valve (V1) mounted in the line connecting the liquid storage tank (STO) to the ash pump (DOS). ) And the second valve (V2) connecting the ash pump (DOS) to the injection system (I) (through the filter (Fi)).

The application of the ring (5f) and the second valve in the zone (5) in the bag manufacturing process in order to obtain the above advantages without any defects affecting the production rate of the system and to obtain the excellent function, quality standards and reliability of the product. The application step 5b 'is carried out under the condition of keeping the temperature constant for a long time by a heat pulse which is automatically adjusted in the temperature range (125-130 ° C) for welding the film used to form the bag. The welding of parts (valve and ring) to the bag is also characterized by a circumferential column of ultrasonic vibration frequency (20-21 kHz), suitable thickness (0.1-0.6 mm) and width (2-7 mm), although different. Using the parts (valve and ring), cutting device 5e 'at 130-135 ° C, the horizontal welding step 5d was made possible at the same time.

As above, a double bag (Fig. 6a) (one filled bag and one empty bag connected at the edge) is obtained by programming the ash system and the cutting device cycle.

When using multiple bobbins or wide bobbins B, the filling step is accomplished by means of a series of injectors I placed in parallel positions.

Zone 6 comprises a step 6a for collecting the filled and separated bags STP and step 6a is oriented vertically in step 5e so that the conveyor belt NT and the second test step ( 6d); Figure 2a shows a test part marked with a pair of compression rollers (RP) for the integrity test. Finally the pavement 7 is preferably a covering step 7a and / or a step 7a 'for at least partly reinforcing one bag edge, for aligning a single bag to the support or to the macrofoam. Step 7b is included and many of them can be superimposed to hold or store the package. When working with bobbins of width n, the machine has n valve applicators (5b) n and (5b '' ') n, n ring applicators (5f) and (5r') n filling needles, and also n batches. There is a pump (DOS) n, and there is also a zone 6 'where the final cut of the bag (s-sn) is made and this bag emerges simultaneously from the test step 6b. The final cut may be made longitudinally along the lines L, L 'and L or transversely along the line TT.

In the first case, when longitudinal cutting is used, the longitudinally aligned sacks can be passed directly and continuously into the sterilizer, which is not displayed because it lies below the sterilization center (6b). There is an advantage.

The second case using transverse cutting has the advantage of the automation of handling caused by the following work steps (for example taking three bags each time on a rigid support roll to obtain a box-shaped predominantly rigid body).

Figure 2a shows a group of packed and cross-cut bags by reference sign 7 ', each bag already being injected into the outer sheath, with or without vacuum.

2b shows that the film F coming from at least one bobbin B is subjected to the printing step 2a before passing through the winding step 2b; This second printing station is only shown schematically.

However, the present invention is not limited to these embodiments because many changes, modifications and substitutions are apparent to those skilled in the art. Therefore, the invention is not limited to the embodiments contained herein and the appended claims.

Claims (3)

Loose bag forming film (F) in the bobbin (B), the marking step (2a) and winding step (2b) treatment, consisting of an ultrasonic vibration washing step (3a) and water jet (3 ') washing step (3b) After a two-stage washing process, the film is then pressurized between the rollers 4a '(4a), treated with VU light (4c), bent (4e), longitudinally welded (5a) and the valve VA In a system of continuously producing and filling liquid bags simultaneously with a flexible synthetic material which carries out the steps of applying (5b, 5b '), filling (5R) and cutting (5e), a) polypropylene and the like. Bag 50, made of plastic and having at least one ring AR having a crown 42 with a thickness of 0.1 to 0.6 mm and a width of 2 to 7 mm, opposite the bag with valves VA and VB 50 Apply to; b) applying a second valve (VB) which is different from the valve (VA) and is made of plastic such as polypropylene and characterized by a crown 32 having a thickness of 0.1 to 0.6 mm and a width of 2 to 7 mm; And c) the rings (AR, AR ') and valves (VA, VB) are provided and connected to a common edge (6-b) and allow sterilization with the filled first bag (SP) and empty or 121 ° C. steam. A double bag made up of two continuous bags (SP, SV) made up of a second bag (SV) filled with an amount of liquid is prepared, and one side of the bag is formed after the step treatment in which the bag formed and filled and labeled is thus wound. A bag manufacturing system characterized in that it performs a partial reinforcement step (7a ') and a step (7a) of covering the shell under vacuum. 2. The longitudinal welding step (5a) and the horizontal welding step (5d) are performed at a constant temperature of 120 to 135 DEG C by means of automatically controlled heat pulses; The valve application step 5b is carried out using ultrasonic vibrations of 20 to 21 KHz under pressure; The ring application step 5R and the film punching step 5c are performed using ultrasonic vibrations of 20 to 21 KHz under pressure; The bag cutting step 5e is carried out simultaneously with the transverse welding step 5d at a temperature kept constant at 125 to 140 ° C by means of a heat pulse that is automatically adjusted; Filling is characterized in that the filling is done periodically by programming the batch cycle. A film feed zone (1) having a film (F) unwinding device (B) and a brake device (DF) for controlling film extension; A washing zone (3) having a water jet (3 ') tank supplied by a closed system using distilled water that is continuously filtered and circulated with an ultrasonic washing tank; In the apparatus having a treatment zone 4 having a drying roller 4a ', a winding roller 4b', and a film alignment roller 4d 'for advancing the 270 prism (PR), bag making and filling zones 5 are provided. A ring application device is provided, and a valve device and a valve for supplying liquid to the filling zone are provided with a program device and two valves for alternately manufacturing a packed bag and an empty bag connected at one edge to each other. Apparatus characterized by the application of one ring and two valves to each bag.

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