Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
  • B65D1/00—Rigid or semi-rigid containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material or by deep-drawing operations performed on sheet material
  • B65D1/22—Boxes or like containers with side walls of substantial depth for enclosing contents
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
  • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
  • B31B50/00—Making rigid or semi-rigid containers, e.g. boxes or cartons
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
  • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
  • B31B2100/00—Rigid or semi-rigid containers made by folding single-piece sheets, blanks or webs
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
  • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
  • B31B2110/00—Shape of rigid or semi-rigid containers
  • B31B2110/30—Shape of rigid or semi-rigid containers having a polygonal cross section
  • B31B2110/35—Shape of rigid or semi-rigid containers having a polygonal cross section rectangular, e.g. square
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
  • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
  • B31B50/00—Making rigid or semi-rigid containers, e.g. boxes or cartons
  • B31B50/26—Folding sheets, blanks or webs
  • B31B50/44—Folding sheets, blanks or webs by plungers moving through folding dies

Definitions

• the cardboard flat blanks are fed to a forming and folding device and pressed by means of a punch through a molding tool, whereby they are formed into a cardboard container.
• the molded boxes are then fed to a packaging system, filled and closed again.
• the invention relates to a device for forming a flat blank made of cardboard to a container, with a mold and a movable in a main direction punch for erecting the flat blank by the molding tool, wherein a base of the punch in at least one direction transverse to the main shape forming direction is adjustable ,
• At least two pivotable about one transverse to the main shape pivot axis pivot side walls are hinged to the stamp, whereby a bounded by the free end edges of the side walls base is adjustable, the side walls by means of train biased spring elements for performing a pivoting movement on wedge elements which are displaceable in the main shape direction, frictionally rest.
• a "main shape direction” is to be understood in particular as the direction in which the cardboard blank is pressed by the die through the die and thereby formed, and can be at an angle of 10 ° to 90 °, for example in one, at an angle to the vertical Angle of 30 °. Preferred is a vertical main shape direction.
• the limited by the end edges base has the shape of a polygon.
• the number of side walls can determine the number of corners of the polygon.
• the base area bounded by the end edges of the side walls can have the shape of a rectangle.
• the side walls are preferably arranged parallel to the main shape direction.
• This container can be formed with sloping side walls.
• the base is aligned perpendicular to the main shape direction.
• the base can also be aligned obliquely opposite to the main shape direction.
• the punch has a lower base plate and the wedge elements are arranged between the lower base plate and the side walls, wherein the wedge elements of the lower base plate and the side walls abut.
• each pivotable side wall is tightened by a plurality of spring elements to the lower base plate.
• each pivotable side part is tightened with two spring elements in the direction of the lower base plate, wherein advantageously a spring element in the upper, the other is fixed in the lower third of the side wall.
• each pivotable side part with a spring element, which is preferably secured in the upper third of the side wall are attracted.
• the spring elements can be fixed by means of a pin or the like on the side wall.
• the spring elements on a holder or tab, which is formed out of the side part be attached.
• the spring elements may be fastened between two adjacent side walls. Due to the angled arrangement of the side walls they can be tightened in the direction of the lower part.
• the wedge elements may be formed as corner pieces with wedge slopes and slidably against corner cutouts of the lower base plate. Preferably, the wedge slopes on the side of the free end of the punch in a parallel to the main direction extending end surface pass. As a result, the wedge elements and the lower base plate can touch each other surface, whereby an optimal power transmission can be ensured.
• the wedge elements are made of a plastic.
• the lower part may be coated with a plastic layer.
• a plastic part can be placed on the lower part between the lower part and the wedge element. Thereby, the sliding behavior of the wedge relative to the lower part can be improved, whereby the wear of both the wedge and the lower part can be advantageously reduced.
• the wedge elements are preferably displaceable by means of pneumatic cylinders.
• the wedge elements can be displaced beyond the end edges of the side walls.
• the molded container may be actively pushed by the punch. This can advantageously reduce the risk of the molded container sticking to the stamp, which can prevent interference.
• the side walls are conveniently hinged to an upper base plate. They can preferably be fastened with one or more screws to the upper base plate. Particularly preferably, the side walls can be infected by means of plastic cams on the upper base plate.
• the punch preferably has at least one suction element at its free end. By suction, the molded container can be pulled to the punch. This may make it possible to pull the molded container back through the mold.
• the device according to the invention comprises a multiplicity of punches with associated shaping tools for simultaneously forming a plurality of flat blanks from cardboard to containers.
• the control of the pivoting movement of the side walls can take place together for all stamps.
• the pivoting movement for each stamp can be controlled individually.
• two punches can be controlled in pairs. If a carton blank is missing from one of these punches, the molding process may be for all stamps are done.
• the pivotal movement of the side walls of the punch with missing carton blank can be assumed. Thereby, an unnecessary wear of the corresponding punch and the associated mold can be avoided, which increases the life. Also, the fault tolerance of the system can be increased.
• the cardboard can stick less to the stamp after molding; This can result in greater production reliability with fewer disruptions.
• the system would have to be stopped, the safety cover would have to be opened and the jammed cardboard removed. Then the system is started again.
• this disturbance can mean an emptying which, in addition to the actual stop of the machine, additionally negatively affects the efficiency of the machine.
• the wedge has two functions: reducing the stamp outline and actively repelling the shaped cardboard from the stamp.
• the "blank" punch can remain tapered and thus will not strike the tool when dipped without carton blank, resulting in less wear.
• Fig. 1 is a perspective view of a stamp for molding a
• Fig. 2 is an enlarged detail of the punch of Fig. 1;
• Fig. 3 is a perspective view of a four punch assembly for simultaneously forming four flat blanks of cardboard
• FIG. 4 shows a longitudinal section through a punch with a first position of the side walls.
• 5 shows the longitudinal section of Figure 4 with a through a punch with a second position of the side walls ..;
• Fig. 6 is a bottom view of a punch in a mold; 7 shows a section through a corner piece with fitting lower base plate and side wall of the punch of Figure 1 in an enlarged view ..;
• FIG. 8 shows the method sequence during the molding of a container from a cardboard flat blank with a device according to the invention
• FIG. 9 shows a variant of the inventive punch.
• a punch 10 shown in FIG. 1 for forming a cardboard flat blank into a container essentially consists of a base body with an upper base plate 12 covered by a cover plate 13 and a lower base plate 14 and one of them On each of the four sides of the upper base plate 12 is a projecting beyond the lower base plate 14 side wall 18 is hinged on each of the four sides of the upper base plate 12 substantially rectangular ground plan having base plates 12, 14 connecting.
• the side walls 18 are attached to in the region of the upper base plate 12 and the overlying cover plate 13 fixed plastic cam 20 and are pivotable due to the elasticity of the plastic material around the pivot axis formed by the plastic cam 20 s.
• the pivoting can be given by a game between the plastic cam 20 and correspondingly larger holes in the side walls 18.
• Adjacent side walls 18 are connected in the region of the base plates 12, 14 via upper and lower spring-loaded spring elements 22, 24.
• the lower base plate 14 has at its corners right-angled corner cut-outs 26 into which displaceable corner pieces 28 engage in the main shaping direction z.
• the corner pieces 28 have two wedge slopes 30, which are the two
• the corner pieces 28 are connected to the upper base plate 12 via a respective pneumatic cylinder 34 which is articulated on the upper base plate 12 and on the respective corner piece 28.
• a respective pneumatic cylinder 34 which is articulated on the upper base plate 12 and on the respective corner piece 28.
• the corner pieces are guided between the lower base plate and the side walls, an additional guidance of the cylinder is unnecessary.
• the corner cutouts 26 in the lower base plate 14 abut the end faces 31 of the corner pieces 28.
• the contact surfaces 32 of the corner pieces 28, which do not engage in the corner cutouts 26 and extend in the main shaping direction z lie flat against the side walls 18, ie. h.,
• the side walls 18 are parallel to the main shape direction z.
• the wedge slopes 30 slide along the corner cutouts 26 in the lower base plate 14.
• the contact surfaces 32 of the corner pieces 28 frictionally adjacent side walls 18 under the tensile force of the spring elements 22, 24 under reduction of the free end edges 19th limited floor space inwards, d. h., in pairs towards each other.
• the distance e between the free end edges 19 of the opposing side walls 18 is reduced in this position.
• This position is shown in Fig. 5.
• Corners of the lower base plate 14 provided with an attachable profile piece 27 of a lubricious plastic material.
• the corner pieces 28 may also be coated with a lubricious plastic or consist of the lubricious plastic.
• Fig. 2 is also a arranged on one of the pneumatic cylinder 34 connecting part 36 for connecting the pneumatic cylinder 34 via a pneumatic line to a compressed air reservoir, not shown in the drawing. Also recognizable is one on the outside of the lower base plate 14 arranged, connectable to a vacuum source suction element 38th
• the punch 10 is usually attached via a mounting flange 40 to a carrier, not shown in the drawing.
• FIG. 3 In the embodiment shown in Fig. 3, four punches 10 are mounted on a cross member 42.
• the cross member 42 is attached via a mounting plate 44 to a support, not shown in the drawing.
• FIG. 8 shows the essential method steps in the erection of a flat cardboard blank 46 to a container 48 in five stages:
• a flat cardboard blank 46 is placed on the upper edge of a tool 50 in the form of a pipe section with a rectangular cross section, with four mold walls 51 parallel to the main forming direction z.
• the punch 10 with parallel to the main forming direction z and parallel to the mold walls 51 of the tool 50 standing side walls 18 is placed on the carton flat blank 46.
• the punch 10 is moved into the tool 50 and the flat cardboard blank 46 pressed between the side walls 18 of the punch 10 and the mold walls 51 of the forming tool 50 is erected to a container 48 having lateral forming walls 51 parallel to the main forming direction z.
• the shape of the erected container is maintained by curing pre-applied hot glue, or by tabs.
• the punch 10 is ejected with the container 48 from the mold 50.
• the corner pieces 28 are pushed down. Swing through it the side walls 18 reducing the base of the punch 10 from the side walls of the molded container 48 inwardly away. At the same time, the container 48 is pushed by the over the end edges 19 of the side walls 18 of the punch 10 outgoing corner pieces 28 away from the punch 10 on a conveyor belt 52.
• the punch 10 travels with inwardly pivoted side walls 18 through the mold 50 to its original position, whereby the corner pieces 28 return to the starting position and the side walls 18 pivot back into the vertical position parallel to the forming surfaces 51 of the mold 50.
• FIG. 9 shows the stamp variant also shown in FIGS. 1 to 3 with suction elements 38 protruding from the underside of the lower base plate 14.
• This stamp variant is particularly useful if the containers 48 remain on the punch after being raised and are closed by means of the punch a follow-up station to be transferred.
• the suction elements 38 connected to a vacuum source ensure that the container 48 can not inadvertently detach from the stamp 10 during transport.

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• Engineering & Computer Science (AREA)
• Ceramic Engineering (AREA)
• Mechanical Engineering (AREA)
• Making Paper Articles (AREA)
• Machines For Manufacturing Corrugated Board In Mechanical Paper-Making Processes (AREA)
• Package Specialized In Special Use (AREA)

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Publications (2)

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• 2011
  • 2011-02-11 DE DE102011004004A patent/DE102011004004A1/de not_active Withdrawn
• 2012
  • 2012-01-31 EP EP12708764.1A patent/EP2673134B1/de active Active
  • 2012-01-31 ES ES12708764.1T patent/ES2530176T3/es active Active
  • 2012-01-31 CN CN201280008220.8A patent/CN103370189B/zh not_active Expired - Fee Related
  • 2012-01-31 CA CA2826244A patent/CA2826244C/en active Active
  • 2012-01-31 WO PCT/EP2012/051501 patent/WO2012107317A1/de not_active Ceased
  • 2012-01-31 US US13/984,891 patent/US9604748B2/en active Active

Non-Patent Citations (1)

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