CA1174157A - Machine for manufacturing, filling and sealing packages - Google Patents
Machine for manufacturing, filling and sealing packagesInfo
- Publication number
- CA1174157A CA1174157A CA000393938A CA393938A CA1174157A CA 1174157 A CA1174157 A CA 1174157A CA 000393938 A CA000393938 A CA 000393938A CA 393938 A CA393938 A CA 393938A CA 1174157 A CA1174157 A CA 1174157A
- Authority
- CA
- Canada
- Prior art keywords
- head
- station
- welding
- forming
- flap
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
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- Making Paper Articles (AREA)
- Closing Of Containers (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
Blanks are produced from a web of plastic-coated paper. The blanks are fed to an expanding-mandrel turntable and to a bottom-flap-forming station on that turntable. The blanks are then transferred to a filling turntable. In a filling station packages formed from the blanks are filled and head seams are sealed in a welding station. On a follow-ing head-forming turntable a forming station and a sealing station for the head flaps are provided. The finished packages are passed at an outlet station to a discharging tray. The machine is used for the manufacture of liquid containers, e.g. for milk or fruit juice.
Blanks are produced from a web of plastic-coated paper. The blanks are fed to an expanding-mandrel turntable and to a bottom-flap-forming station on that turntable. The blanks are then transferred to a filling turntable. In a filling station packages formed from the blanks are filled and head seams are sealed in a welding station. On a follow-ing head-forming turntable a forming station and a sealing station for the head flaps are provided. The finished packages are passed at an outlet station to a discharging tray. The machine is used for the manufacture of liquid containers, e.g. for milk or fruit juice.
Description
~174157 The invention relates to a machine for manufac-turing, filling and sealing packages where the packages are formed and welded from a flexible web of material with an expanding-mandrel turntable and with at least one following filling turntable with a filling station and a welding station for a head seam.
Such machines are generally used for the manufacture of liquid containers, e.g. containers for milk, fruit juice and the like. The web of material, e.g. plastic-coated paper, is drawn from a feed roll. The individual package blanks are made from the web by cutting them off and welding them. For this purpose the blanks are taken up one by one on expanding mandrels.
In a known machine described in U.S. patent 3,918,236 issued to Allen, November 11, 1975, the packages thus formed, which remain open only at the top, are alternately transferred to two filling turntables on which the packages are filled at a filling station and sealed at a head seam-welding station.
If rectangular packages are produced, there are two flaps at the top and bottom of each package. To ensure that these flaps do not get in the way during the subsequent packing of the filled packages in a packing container, e.g. a carton, these flaps must either be laid flat against the out-~17~5~
side of the package or be cut off. Cutting off the flaps isonly possible if the package sheath at this place has an additional weld so that no opening is produced by cutting off the flaps. Such an added welding step is comparatively expensive. Merely pressing the bottom and top flaps does not suffice to bring these flaps to a position suitable for subsequent packing.
The purpose of the invention is therefore to design a machine of the above type that provides a permanent adherence of the bottom and top flaps to the outside of the package. The additional work stations needed for this pur-pose must be arranged so as to consume as little space as possible and must be designed in such a way as to be as struc-turally simple as possible.
This problem is resolved in the invention by providing forming station for the bottom flaps on the expand-ing-mandrel turntable, by having a welding die that extends over the entire length of the head seam at the welding station for that seam and by having a head-forming turntable that possesses a forming station for the head flaps and a sealing station for the head flaps after the filling turntable.
The bottom flaps and the top flaps are preformed at the respective forming stations in such a way that they i~74157 can be sealed simply to the outside of the package by means of pressure and heat. Owing to the preforming the forces arising at the sealing place are kept very small. As a consequence there is no danger of the sealing joint reopening.
On the other hand the strength requirements of the seal are small.
The larger number of working stations is produced in a very simple and space-saving manner by shifting the stations for forming and sealing the head flaps to a special head-forming turntable. Compared with the possibility of providing a larger turntable with more work stations this solution has the advantage of better use of space. Struc-turally, the solution is particularly simple, because essen-tially the same structural parts are used for the head-forming turntable that are used for the filling turntable.
The invention will be explained more fully with reference to an embodiment illustrated in the drawing.
In the drawings:
Figure 1 shows a simplified plan view of a machine for manufacturing, filling and sealing packages;
Figure 2 shows a partial section, enlarged, along the line II - II in Figure 1, of the forming station for the bottom flap in its starting position;
~74157 Figure 3 shows, in partial section corresponding to Figure 2, the forming station in its end position;
Figure 4 shows, in an enlarged partial section along the line IV - IV in Figure 1, a welding station for the head seam in the welding position, the initial position of the welding head being represented in dot-dash lines;
Figure 5 shows, in an enlarged partial section along the line V - V in Figure 1, a forming station for the head flaps in the initial position;
Figure 6 shows the station according to Figure 5 in its end position;
Figure 7 shows, in a partial section along the line VII - VII in Figure 1, a heating station for the head flaps;
Figure 8 shows, in an enlarged partial section along the line VIII - VIII in Figure 1, a sealing station for the head flaps in the initial position, and Figure 9 shows the station according to Figure 8 in its end position.
The machine shown in Figure 1 is for manufacturing filling and sealing packages. It has a feed roll 2 mounted in a machine frame 1, and from this roll a web of material made, for example, of plastic-coated paper is drawn. First the web of material 3 passes through scoring station 4 where ~17~157 it receives a longitudinal scoring and is then folded over.
In this form web 3 passes through a press 5 in which the previously printed web is furnished with a datum imprint.
Web 3 then passes through a stamping station 6, a longitudinal-seam welding station 7, a second pressing and a feeding station 8 in which the longitudinal seam is given a second pressing and which also assists in web trans-port. In a cutting station 10 the blanks are cut off for the individual packages and in a loading station 11 they are fitted onto an e~panding mandrel 12 on a turntable 13 that is only indicated by broken lines in the Figure.
Rotating clockwise on turntable 13 the packages arrive at a folding station 14 at which the two lateral seams are formed. The fold formed during the folding over of the web in station 4 lies at the bottom of the package.
In station 14 bottom flaps 16 of package 15, developed during the fitting of the package onto expanding mandrel 12, are heated and are then sealed at sealing station L 7 (Figure 2 and 3).
Package blank 15, thus prepared for the filling process and hereinafter referred to simply as the "package", is transferred in a transfer station 18 from turntable 13 to a filling turntable 19 where it is stripped from the expanding mandrel. In a filling station 20 package 15 is filled then in a spreading station 21 the head seam of package 15 is drawn apart by spreading fingers. At a following forming station 22 the head seam is preformed so that the head seam can be welded at a welding station 23 (Figure 4). The sealed package 15 is then transferred at a transfer station 24 to a head-forming turntable 25 including station 26 (Figures 5 and 6) for forming the head flaps, where the projecting head flaps 27 of package 15 are folded downwards and thus are preformed. In a following heating station 28 (Figure 7) the undersides of head flaps 27 and the outsides of the packages are heated so that in a follow-ing sealing station 29 (Figures 8 and 9) head flaps 27 can be sealed tightly on the outside of the package.
At an outlet station 30 the finished packages 15 arrive at a discharge tray 31 from which they are taken for further loading.
Forming station 17 (Figure 2) for the bottom flaps possesses two laterally movable stamp plates 40, each of which is joined to guide rolls 41. A hydraulic cylinder 42 bears a vertically movable control body on its piston rod 43, and on this body side arms 45 are mounted each of which terminates in a slanted control surface 46 that engages with guide rolls 41.
At the lower end of each stamp plate 40 a flap-forming swivel plate 48 is mounted by a hinge 47. Each plate 117~157 48 bears a guide roll 49 which is in contact with curved guide surfaces 50 on control body 44.
When control body 44 is moved upwards by hydraulic cylinder 42 stamp plates 40 move laterally towards package 15; simultaneously swivel plates 48 are rotated into the final position shown in Figure 3.
Figure 2 shows a bottom-flap heater 51 located in folding station 14 and indicated with dot-dash lines. Heater 51 heats bottom flaps 16 and the lower outside surface of package 15. When these heated surfaces are pressed against each other in forming station 17, as represented in Figure 3, flaps 16 are sealed in this position. Stamp plates 40 adjacent the side faces of the package prevent bulging of the side faces of package 15 when the pressure required for sealing is applied to the bottom of the package.
At welding station 23 (Figure 4) for the head seams there is a welding head operated vertically by a hydraulic cylinder 60. It has a stationary welding die 62 and a swivelling welding die 63 hinged thereto. Both welding dies, 62 and 63, are heatable. A pressure cylinder 64 engages pivotable welding die 63.
When package 15, whose head seam 65 has already been preformed at station 22, arrives at head-seam welding ~17~157 station 23, welding head 61 is at first in the open position represented in Figure 4 with dot-dash lines. Hydraulic cylinder 60 drives welding head 61 downwards. Hydraulic cylinder 64 then closes the welding head and exerts the necessary welding pressure and heat on head seam 65. The lengths of welding dies 62, 63 is so chosen that they extend over the entire length of head seam 65. Thus the head seam is completely closed in a single welding process. The head seam therefore extends into head flaps 27.
Transfer station 24, which is not represented in detail, is constructed similarly to welding station 23, for the head seams, except that dies 62, 63 are not heated but cooled. Here head seam 65 is pressed again and strengthened. The apparatus which holds package 15 at the head seam in transfer station 24 and whose basic construc-tion is shown in Figure 4, is arranged to move laterally and transports package 15 from filling turntable 19 to head-forming turntable 25.
Head-shaping station 26 (Figures 5 and 6) possesses a shaping form 71, movable by means of a hydraulic cylinder 70. The plate-shaped centre part of the form 71 bears down-wardly to against head-flap dies 72. When shaping form 71 is lowered over package 15 (Figure 6) head-flap dies 72 press il74157 head flaps 27 downwards so that the latter are preshaped.
At the following head-flap heating station 28 (Figure 7) hot-air blowers 73 engage with their heating nozzles 74 beneath head flaps 27 and heat the lower side of the head flaps 27 and the opposite surfaces of the package side walls. During this step guides 75 hold head flaps 27 in their position.
At the following head-flap sealing sta~ion 29 (Figures 8 and 9) the surfaces thus heated are forced by laterally pressing flap-sealing dies 80 against the package side walls where they are firmly sealed. Head flaps 27 are held in their position before sealing by guide rods 81.
Lateral flap sealing dies 80 are joined at a hinge 82 to each other and to a vertically movable head support plate 83. A hydraulic cylinder 84 is connected flexibly through its piston rod 85 and levers 86 with both flap-sealing dies 80. When piston rod 85 is driven out first head-support plate 83 is laid against the top of package 15;
then flap-sealing dies 80 press laterally against head flaps 27. During this step the head-support plate 83 prevents the top of package 15 from bulging upwards from the effect of the pressure of flap-sealing dies 80.
Such machines are generally used for the manufacture of liquid containers, e.g. containers for milk, fruit juice and the like. The web of material, e.g. plastic-coated paper, is drawn from a feed roll. The individual package blanks are made from the web by cutting them off and welding them. For this purpose the blanks are taken up one by one on expanding mandrels.
In a known machine described in U.S. patent 3,918,236 issued to Allen, November 11, 1975, the packages thus formed, which remain open only at the top, are alternately transferred to two filling turntables on which the packages are filled at a filling station and sealed at a head seam-welding station.
If rectangular packages are produced, there are two flaps at the top and bottom of each package. To ensure that these flaps do not get in the way during the subsequent packing of the filled packages in a packing container, e.g. a carton, these flaps must either be laid flat against the out-~17~5~
side of the package or be cut off. Cutting off the flaps isonly possible if the package sheath at this place has an additional weld so that no opening is produced by cutting off the flaps. Such an added welding step is comparatively expensive. Merely pressing the bottom and top flaps does not suffice to bring these flaps to a position suitable for subsequent packing.
The purpose of the invention is therefore to design a machine of the above type that provides a permanent adherence of the bottom and top flaps to the outside of the package. The additional work stations needed for this pur-pose must be arranged so as to consume as little space as possible and must be designed in such a way as to be as struc-turally simple as possible.
This problem is resolved in the invention by providing forming station for the bottom flaps on the expand-ing-mandrel turntable, by having a welding die that extends over the entire length of the head seam at the welding station for that seam and by having a head-forming turntable that possesses a forming station for the head flaps and a sealing station for the head flaps after the filling turntable.
The bottom flaps and the top flaps are preformed at the respective forming stations in such a way that they i~74157 can be sealed simply to the outside of the package by means of pressure and heat. Owing to the preforming the forces arising at the sealing place are kept very small. As a consequence there is no danger of the sealing joint reopening.
On the other hand the strength requirements of the seal are small.
The larger number of working stations is produced in a very simple and space-saving manner by shifting the stations for forming and sealing the head flaps to a special head-forming turntable. Compared with the possibility of providing a larger turntable with more work stations this solution has the advantage of better use of space. Struc-turally, the solution is particularly simple, because essen-tially the same structural parts are used for the head-forming turntable that are used for the filling turntable.
The invention will be explained more fully with reference to an embodiment illustrated in the drawing.
In the drawings:
Figure 1 shows a simplified plan view of a machine for manufacturing, filling and sealing packages;
Figure 2 shows a partial section, enlarged, along the line II - II in Figure 1, of the forming station for the bottom flap in its starting position;
~74157 Figure 3 shows, in partial section corresponding to Figure 2, the forming station in its end position;
Figure 4 shows, in an enlarged partial section along the line IV - IV in Figure 1, a welding station for the head seam in the welding position, the initial position of the welding head being represented in dot-dash lines;
Figure 5 shows, in an enlarged partial section along the line V - V in Figure 1, a forming station for the head flaps in the initial position;
Figure 6 shows the station according to Figure 5 in its end position;
Figure 7 shows, in a partial section along the line VII - VII in Figure 1, a heating station for the head flaps;
Figure 8 shows, in an enlarged partial section along the line VIII - VIII in Figure 1, a sealing station for the head flaps in the initial position, and Figure 9 shows the station according to Figure 8 in its end position.
The machine shown in Figure 1 is for manufacturing filling and sealing packages. It has a feed roll 2 mounted in a machine frame 1, and from this roll a web of material made, for example, of plastic-coated paper is drawn. First the web of material 3 passes through scoring station 4 where ~17~157 it receives a longitudinal scoring and is then folded over.
In this form web 3 passes through a press 5 in which the previously printed web is furnished with a datum imprint.
Web 3 then passes through a stamping station 6, a longitudinal-seam welding station 7, a second pressing and a feeding station 8 in which the longitudinal seam is given a second pressing and which also assists in web trans-port. In a cutting station 10 the blanks are cut off for the individual packages and in a loading station 11 they are fitted onto an e~panding mandrel 12 on a turntable 13 that is only indicated by broken lines in the Figure.
Rotating clockwise on turntable 13 the packages arrive at a folding station 14 at which the two lateral seams are formed. The fold formed during the folding over of the web in station 4 lies at the bottom of the package.
In station 14 bottom flaps 16 of package 15, developed during the fitting of the package onto expanding mandrel 12, are heated and are then sealed at sealing station L 7 (Figure 2 and 3).
Package blank 15, thus prepared for the filling process and hereinafter referred to simply as the "package", is transferred in a transfer station 18 from turntable 13 to a filling turntable 19 where it is stripped from the expanding mandrel. In a filling station 20 package 15 is filled then in a spreading station 21 the head seam of package 15 is drawn apart by spreading fingers. At a following forming station 22 the head seam is preformed so that the head seam can be welded at a welding station 23 (Figure 4). The sealed package 15 is then transferred at a transfer station 24 to a head-forming turntable 25 including station 26 (Figures 5 and 6) for forming the head flaps, where the projecting head flaps 27 of package 15 are folded downwards and thus are preformed. In a following heating station 28 (Figure 7) the undersides of head flaps 27 and the outsides of the packages are heated so that in a follow-ing sealing station 29 (Figures 8 and 9) head flaps 27 can be sealed tightly on the outside of the package.
At an outlet station 30 the finished packages 15 arrive at a discharge tray 31 from which they are taken for further loading.
Forming station 17 (Figure 2) for the bottom flaps possesses two laterally movable stamp plates 40, each of which is joined to guide rolls 41. A hydraulic cylinder 42 bears a vertically movable control body on its piston rod 43, and on this body side arms 45 are mounted each of which terminates in a slanted control surface 46 that engages with guide rolls 41.
At the lower end of each stamp plate 40 a flap-forming swivel plate 48 is mounted by a hinge 47. Each plate 117~157 48 bears a guide roll 49 which is in contact with curved guide surfaces 50 on control body 44.
When control body 44 is moved upwards by hydraulic cylinder 42 stamp plates 40 move laterally towards package 15; simultaneously swivel plates 48 are rotated into the final position shown in Figure 3.
Figure 2 shows a bottom-flap heater 51 located in folding station 14 and indicated with dot-dash lines. Heater 51 heats bottom flaps 16 and the lower outside surface of package 15. When these heated surfaces are pressed against each other in forming station 17, as represented in Figure 3, flaps 16 are sealed in this position. Stamp plates 40 adjacent the side faces of the package prevent bulging of the side faces of package 15 when the pressure required for sealing is applied to the bottom of the package.
At welding station 23 (Figure 4) for the head seams there is a welding head operated vertically by a hydraulic cylinder 60. It has a stationary welding die 62 and a swivelling welding die 63 hinged thereto. Both welding dies, 62 and 63, are heatable. A pressure cylinder 64 engages pivotable welding die 63.
When package 15, whose head seam 65 has already been preformed at station 22, arrives at head-seam welding ~17~157 station 23, welding head 61 is at first in the open position represented in Figure 4 with dot-dash lines. Hydraulic cylinder 60 drives welding head 61 downwards. Hydraulic cylinder 64 then closes the welding head and exerts the necessary welding pressure and heat on head seam 65. The lengths of welding dies 62, 63 is so chosen that they extend over the entire length of head seam 65. Thus the head seam is completely closed in a single welding process. The head seam therefore extends into head flaps 27.
Transfer station 24, which is not represented in detail, is constructed similarly to welding station 23, for the head seams, except that dies 62, 63 are not heated but cooled. Here head seam 65 is pressed again and strengthened. The apparatus which holds package 15 at the head seam in transfer station 24 and whose basic construc-tion is shown in Figure 4, is arranged to move laterally and transports package 15 from filling turntable 19 to head-forming turntable 25.
Head-shaping station 26 (Figures 5 and 6) possesses a shaping form 71, movable by means of a hydraulic cylinder 70. The plate-shaped centre part of the form 71 bears down-wardly to against head-flap dies 72. When shaping form 71 is lowered over package 15 (Figure 6) head-flap dies 72 press il74157 head flaps 27 downwards so that the latter are preshaped.
At the following head-flap heating station 28 (Figure 7) hot-air blowers 73 engage with their heating nozzles 74 beneath head flaps 27 and heat the lower side of the head flaps 27 and the opposite surfaces of the package side walls. During this step guides 75 hold head flaps 27 in their position.
At the following head-flap sealing sta~ion 29 (Figures 8 and 9) the surfaces thus heated are forced by laterally pressing flap-sealing dies 80 against the package side walls where they are firmly sealed. Head flaps 27 are held in their position before sealing by guide rods 81.
Lateral flap sealing dies 80 are joined at a hinge 82 to each other and to a vertically movable head support plate 83. A hydraulic cylinder 84 is connected flexibly through its piston rod 85 and levers 86 with both flap-sealing dies 80. When piston rod 85 is driven out first head-support plate 83 is laid against the top of package 15;
then flap-sealing dies 80 press laterally against head flaps 27. During this step the head-support plate 83 prevents the top of package 15 from bulging upwards from the effect of the pressure of flap-sealing dies 80.
Claims (6)
1. Machine for manufacturing, filling and sealing packages formed and welded from a flexible web of material with an expanding-mandrel turntable and with at least one filling turntable with a filling station and a welding station for a head seam, characterized in that a forming station for a base flap is located on the expanding-mandrel turntable, that the welding station for the head seam has welding dies that extend over the entire length of the head seam, and that following the turntable there is a head-forming turntable that possesses a forming station for the head seam and a sealing station for the head flap.
2. Machine according to claim 1, characterized in that the forming station for the base flap possesses two laterally movable stamp plates to the lower end of each of which a flap-forming swivel plate is hinged, and that a vertically movable control element possesses two control surfaces each of which moves a stamp plate laterally, and two controlling cams each of which engages with a flap-forming swivel plate that it rotates.
3. Machine according to claim 1, characterized in that the welding station for the head seam possesses a welding head that is movable vertically by means of a hydraulic cylinder, the welding head comprising a stationary heatable welding die and pivotable, heatable welding die articulated thereto, and that a hydraulic cylinder operates the pivotable welding die.
4. Machine according to claim 1, characterized in that at the place of transfer between the filling turn-table and the head-forming turntable a transfer station is provided which possesses a movable transfer gripping device with a gripping head that can be moved vertically by means of a hydraulic cylinder, the gripping head comprising a stationary gripping die and a pivotable die hinged thereto, and that a hydraulic cylinder operates the pivotable gripping die.
5. Machine according to claim 1, characterized in that the forming station for the head flap possesses a vertically moving shaping element with downwardly sloped forming dies for the head flap.
6. Machine according to claim 1, characterized in that the sealing station for the head flap possesses a vertically moving head support plate and two lateral flap-sealing dies articulated thereto.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000393938A CA1174157A (en) | 1982-01-12 | 1982-01-12 | Machine for manufacturing, filling and sealing packages |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000393938A CA1174157A (en) | 1982-01-12 | 1982-01-12 | Machine for manufacturing, filling and sealing packages |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1174157A true CA1174157A (en) | 1984-09-11 |
Family
ID=4121799
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000393938A Expired CA1174157A (en) | 1982-01-12 | 1982-01-12 | Machine for manufacturing, filling and sealing packages |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1174157A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110641754A (en) * | 2018-06-26 | 2020-01-03 | 东洋自动机株式会社 | Vacuum packaging machine and vacuum packaging method |
-
1982
- 1982-01-12 CA CA000393938A patent/CA1174157A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110641754A (en) * | 2018-06-26 | 2020-01-03 | 东洋自动机株式会社 | Vacuum packaging machine and vacuum packaging method |
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|---|---|---|---|
| MKEC | Expiry (correction) | ||
| MKEX | Expiry |