DE102004051556B4 - Apparatus and method for producing plastic bags - Google Patents

Abstract

Device (350) for producing plastic bags (330) made of plastic film (120, 130) with
i.) one or more film dispensers (340) for providing plastic films (120, 130);
ii.) one or more port dispensers for providing plastic elements (250);
iii.) a combined welding / cutting tool (90) for
a) attaching the plastic elements (250) to the plastic bags (330) to form ports;
b) welding together the plastic films (120, 130) on a welding mold (40); and
c) cutting the plastic films (120, 130);
iv.) another welding tool (280) for rewelding the ports; and
v :) a transfer station (290) to take over the plastic bag (330) for further processing.

Description

Territory of invention

The Invention is in the field of plastics processing and the Systems engineering. The invention relates to a device and a Process for producing plastic bags with one or more Ports.

Background of the invention

Plastic bags, often in the form of foil bags, are used in the field of medicine. Your uses are diverse. Plastic bags can for receiving infusion solutions serve and become u.a. also for the storage of blood (blood) and the storage of used in sterile medical fluids. Need plastic bag filling and removal systems, which are designed as so-called ports, the plastic bag depending on the purpose of use, one, two or can have multiple ports. Each port can, depending on the intended use, a special Shaping and / or individual construction components have.

Plastic bags with ports are z. B. from the scriptures DE 196 34 944 C1 and DE 199 58 952 A1 known. There, production methods are described in which a one-piece insert made of plastic is welded into the edge region of a plastic bag formed from two superimposed plastic films. The insert consists of a solid piece of plastic of sufficient cross-sectional size, so that in the insert either one, two or more ports are to accommodate each with a circular cylindrical flow area.

ports can in plastic bags with different types of plastic elements will be realized. Plastic elements can be used as extruded tubes, e.g. made of polypropylene with or without an inner layer of EVA be. Plastic elements can also as injection molded parts, e.g. made of polypropylene, be formed.

A method and apparatus for continuously forming bag-shaped containers from an inflatable tube is known from the patent DE 692 16 991 T2 known. In this case, a tubular film is first glued or welded at the ends of the bag to be formed in one unit, then transported in a cooling unit before the bags are separated in a punching and separating device. This system has the disadvantage that a number of devices have to be arranged one behind the other, which makes the device very bulky, that the film has to be transported from one device to the next, and then has to be realigned with respect to each device. In addition, a further work step and a further device must be inserted if ports are to be installed in the bag.

The US patent specification US 4,352,669 describes a system for making flexible plastic blood bags with sealed ports. In this system, two layers of vinyl film are first cut into shape, then further transported to another device in which the ports are inserted using a mandrel. Thereafter, the films are further transported to a welding device before they are in turn transported to a separate cutting station. This system also has the disadvantage that the film has to be transported from one station to the next between each work step, whereby the system requires more space and the film has to be realigned at each station.

The Production of plastic bags takes place in a known manner a manufacturing process in which two plastic sheets to be welded together a welding / cutting tool supplied which may be one or more useful, i. its tool shape for a or more plastic bag can be designed. The feeder of to be welded together Plastic films are in the form of plane-parallel superimposed Endless plastic films, commonly referred to as Blown endless tube uncut or cut into sheets withdrawn from a roll and kept stretched by dancer rollers by known means (eg by a foil clamp) it is ensured that the feed end the plastic films in registration at the input side of the two tool halves formed welding / cutting tool is positioned.

Then, the tool halves are moved apart and the plastic films are pulled through the open tool For this purpose, usually grip vacuum cleaner through the open tool and detect the accurately positioned on the input side of the tool feed end of the plastic films and pull this feed end to the output side through the open tool whereupon, at or shortly after closing (closing) of the mold halves, the welds between the plastic films contoured according to the shape of the plastic bags are made and at the same time cut by means of separating knife, which are built into the welding / cutting tool, the plastic bag and of the still fresh (unwelded) plastic films are severed such that a new feed end of the plastic films is positioned on the input side of the welding-cutting tool.

The described manufacturing methods are in terms of details the procedures and the one for it used systems and devices have been optimized many times. However, it has not been able to achieve a significant increase in performance to achieve in plastic bag production. The temporal procedures the individual process steps of welding and cutting as well a positionally accurate handling of the finished plastic bag and if necessary, their filling and sealing as well as desired their introduction into a bag did not appear changeable.

Summary of the invention

task The invention is an improved production of plastic bags by new or improved process steps and new or improved Reach devices.

These and further objects are achieved by the invention.

A inventive device for the production of plastic bags made of plastic film one or more film dispensers for providing plastic films; one or more port donors for providing ports; a combined one Welding / cutting tool for attaching the ports to the plastic bags, for welding together the Plastic films on a contour and for cutting the plastic films; another welding tool for rewelding the ports; and a transfer station for taking over the plastic bag for the further processing.

A Compilation of foil dispensers, port dispensers, combined Welding / cutting tool and a transfer station in a device simplifies the manufacturing process and allows to create a compact device.

In a preferred embodiment the device is the plastic film in the combined welding / cutting tool essentially horizontal.

A Such arrangement of the device allows a particularly simple Inserting the plastic film in the combined welding / cutting tool. The plastic film may already be flat due to gravity on the combined welding / cutting tool rest.

The Device can with a preheating station for the Plastic elements are equipped. Through a preheating station for the Plastic elements can the plastic elements before the welding step to an elevated temperature to be brought. As a result, the welding of the plastic elements be facilitated and accelerated with the plastic film and Temperature stresses can be reduced.

In a preferred embodiment the device comprises a film printing unit.

With the film printing unit can the plastic films are printed so that information about ingredients, Material of the plastic bag, expiry date of the plastic bag on the plastic bags, etc. can be provided. A Folienbedruckeinheit can, for example, after one or the be arranged several slide dispensers.

A preferred embodiment the device for producing plastic bags has a such structure that in the combined welding / cutting tool simultaneously each 2 plastic elements are attached to 2 plastic bags.

The Device for the production of plastic bags can for a Passage of 2 plastic bags, each with 2 plastic elements be optimized. Such a configuration allows a compact Structure of the device for the production of plastic bags at high throughput at the same time.

The Apparatus for producing plastic bags may be a bag filling machine for filling with a liquid include.

By an integration of a bag filling machine into the device, the manufacturing process can be further simplified become. handing over and transporting manufactured plastic bags from the device out, the hygienic, usually in a clean room, can be avoided.

In a preferred embodiment is the bag filling machine with filling devices for the plastic bags, with a surge tank for the liquid and equipped with a bag closing station.

Through the pressure equalization tank, the liquid can be kept constant at a, possibly increased, pressure. The liquid can be filled by opening a valve metered via the filling in plastic bag. Closing the plastic bag with a bag closing station in the same clean room can Beu keep the contents clean. The closing can be done for example by placing or welding a cap on a port.

To the combined welding / cutting station can a swivel device in the device for manufacturing be introduced by plastic bags. The swivel device The plastic bag can be moved from the horizontal position to a vertical position turn that for the filling the plastic bag in the filling station conducive is.

The Device for the production of plastic bags can with a Repackaging machine supplemented become. In the repacking machine, the plastic bags can a plastic wrap film be packed. The plastic wrap film is provided by one or more second film dispensers. The plastic bag can be hygienically packed by the packaging in the bag safe and protected be transported and stored. Dirt of the finished Plastic bag, e.g. at the ports, can be prevented.

A simplified device for the production of plastic bags is achieved by a welding tool, which is a stationary, substantially flat, lower welding tool plate and a movable, molded, upper welding tool plate comprises.

One such welding tool allows a plastic film slightly above the lower welding tool plate can be pulled. The lower welding tool plate should in particular in the area where the plastic film rests, just be. A level lower welding tool plate is manufacturing technology easy and cheap to manufacture and easy to clean. Increase resting parts the service life of plants. Dormant parts can be used for construction and stabilization the entire device can be used. With the moving, shaped, upper welding tool plate can several Layers of plastic film are compressed. The welding area can be defined by the shape of the upper welding tool plate. By the shaping of the upper welding tool plate is also that shrink-wrapping from ports into the plastic bags possible.

Similar Advantages result from a cutting tool, which has a resting, essentially flat, lower cutting tool plate and a movable, molded, upper cutting tool plate includes. Shaped means in particular, that knife or other types of separation devices are present on the upper cutting tool plate.

By a combined welding / cutting tool, which is a resting, substantially flat, lower tool plate and a movable, molded, upper tool plate is, is the device for the production of plastic bags further simplified. Only one more tool is necessary for the steps of welding and of severing. The number of moving plant parts is further reduced. The plant size can be downsized. The equipment costs can be lowered, as only still a tool for compressing the plastic films necessary is that at the same time then weld the plastic films and can cut.

advantageously, is the lower tool plate in a combined welding / cutting tool made of hard or tempered Made of steel. This will continue the life of the plate increased, so the lower tool plate rarely needs to be replaced.

advantageously, The lower tool plate has an insert in the area where Plastic elements are attached to the plastic bag.

Of the Insert can be separately heated and exchangeable. The use Can be made of a different material than the lower tool plate be. The insert may have a recess for balancing the height of the plastic element when moving together the combined welding / cutting tool.

By the use becomes the squeezing the plastic films facilitated. The separate temperature control on the insert facilitates the welding of the plastic element to the plastic bag. The insert can be at a higher temperature than the lower tool plate are brought.

The Service life of the lower tool plate can continue through a softer Material in the area of the upper tool plate, especially in the Separators increased become. The upper tool plate is doing in a way attached so that the entire top plate can be easily replaced can or preferably the separators easily replaced can be.

In a device for producing plastic bags, the welding process can be improved by a special design of a welding tool or combined welding / cutting tool for connecting two layers of plastic film. The welding tool or combined welding / cutting tool includes a lower welding tool plate or lower workpiece tool plate with a first temperature in use and an upper welding tool plate or upper tool plate with a second temperature in use. The first temperature is below the softening temperature of the material or materials of the plastic films. This allows the plastic films to be heated without sticking to the bottom plate. The second temperature is at least partially above the melting temperature of the material or the materials of the plastic films, at least in partial areas of the upper welding tool plate or upper tool plate. Due to the at least temporarily increased above the melting temperature of the material of the plastic film second temperature, the connection of the layers of the plastic film is achieved.

In a preferred embodiment the first temperature is kept substantially constant over time. A constant first temperature is easy to realize and it is possible without regulatory issues a first temperature kapp below the softening temperature of the material of the plastic film adjust.

The first temperature can over set essential areas of the lower tool plate the same become. A uniform warming Can with standard heaters regardless of the shape and location the desired Welding areas take place. Another possibility consists in only heating areas of the lower tool plate, in which the welding process should be done. This can be a bonding of the plastic film with the further lower lower tool plate. The first temperature can also temporally and locally set substantially constant on the lower die plate become.

The second temperature can also be constant over time, above the Melting temperature of the material used for the plastic film, held become. This also results in a simplified temperature control. The second temperature can also be in the area of the upper tool plate essentially local kept constant. But here too, areas, e.g. the separators in combined welding / cutting tools, cooler, in particular be kept below the softening temperature.

One combined welding / cutting tool has for the execution a working method according to the invention the advantage that the gripping system when pulling the plastic films through the open Tool in the tool itself a contourless and even lower tool plate finds that does not hinder the film transport. The foil transport is not hindered by sticking the plastic film, because the lower tool plate is "cold". Under the term "cold" is in the sense of To understand that the lower die plate, e.g. by a suitable, near-surface built-in temperature detection and temperature control in a different temperature state is held as it the temperature condition of the hitherto known welding tools equivalent. In practice, so far always has always been a softening or a melting of the plastic films to be processed in purchase have taken. In the present invention "cold" lower tool plate is characterized avoided that the "cold" state of the surface of the bottom Tool plate far enough below the softening temperature to processing plastic films, so that the plastic films can not adhere to the lower tool plate. The plastic films lie on the lower die plate dimensionally stable and easy to move on.

By the achieved dimensional stability the plastic films on the flat and "cold" lower tool plate is also the dimensional stability the produced plastic bag of high accuracy.

The Process steps of welding, cutting or a combined Welding / cutting step can by a transport system according to the invention be made more efficient. The transport system can be closed Cutting tool, welding tool or combined cutting / welding tool are passed over. During the Process of welding or cutting still done can, the plastic film in front of the cutting tool, welding tool or combined cutting / welding tool from the transport system be taken. The transport system can have one or more layers Plastic film in the opened Cutting tool, welding tool or a combined cutting / welding tool.

Prefers is the transport system by a first and / or a second Gripper executed, the side of the cutting tool, welding tool or combined Cutting / welding tool passed by become. The first gripper and / or the second gripper can as be formed mechanical gripper, which one or more Apply layers of plastic film. The transport system is also with Vacuum suction or with rollers feasible.

In a further preferred embodiment, the cutting tools, welding tools or combined cutting / welding tools are provided with recesses such that the first and second grippers can still hold the one or more layers of plastic films while the cutting tools, welding tools or combined cutting / welding tools are closing and are closed. By suitably fitting the recesses and the first and / or second grippers, the plastic film can thus be held flat on the lower welding tool plate, the lower cutting tool plate or the lower tool plate.

The Manufacturing process for the production of plastic bags can by Nests on a belt on the device for the production of plastic bags be further improved. The nests take the plastic elements up and carry these to the welding tool or combined welding / cutting tool. The plastic elements remain during of the welding step or the welding / cutting step Held in the nests. The plastic bags can after the welding / cutting step from the combined welding / cutting tool taken with the plastic elements retained in the nests become.

For filling the Plastic bag is in a preferred embodiment, a filling station for plastic bags provided with at least two ports. To problems to avoid dripping and still at high filling speed enough To achieve accurate dosages, plastic bags are made with several Ports over several supply lines filled. The supply lines open according to the invention in one Dosing valve and can by a valve stamp for a common membrane of several leads are sealed.

One improved process for the production of plastic bags can be achieved by plastic films of one or more Be removed from film dispensers; Ports, which one or more Port dispensers are provided in a combined welding / cutting tool attached to the plastic booties; in a combined Welding / cutting tool the plastic films are welded together at a contour; the ports are rewelded to another welding tool; and the plastic bags taken at a transfer station become.

Advantageous In the process, the plastic film becomes substantially horizontal in the combined welding / cutting tool introduced.

The horizontal position facilitates handling of the plastic film. The plastic film can move from gravity to a lower tool plate depressed become.

In a preferred embodiment one or more plastic films are printed.

By printing on the plastic film can provide important information, e.g. above Content and type of plastic bag already in the production of plastic bags to disposal be put.

A preferred embodiment of the method positions two each Plastic elements on two plastic bags so in the combined welding / cutting tool, that by welding together and cutting two plastic bags with two ports emerge.

By a method for producing two plastic bags becomes an efficient middle ground between a compact facility and possible Throughput indicated.

in the Process for the production of plastic bags, the Plastic bag also filled become.

Filling one The plastic bags directly in the manufacturing process are time consuming and possibly contaminating handovers and transports to other manufacturing sites and processing machines unnecessary.

preferably, the procedure is carried out in such a way that the plastic bags are closed.

One close The plastic bag in the manufacturing process avoids possible contamination and other transfer stations to other devices.

In The process for producing plastic bags can also be the Packaging the finished and possibly filled plastic bags in a transfer bag to get integrated. Packing in bag reduces possible contamination the plastic bag.

The Invention comprises a process for the production of plastic bags, at the plastic films over a stationary, substantially flat, lower welding tool plate a welding tool guided become. A movable, molded, upper welding tool plate presses for the welding process from above onto the plastic films. Leave on a resting lower welding tool plate Position plastic films well and hold tight. Similar Advantages also result from a cutting tool with a stationary, substantially planar, lower cutting tool plate, in which a Press the upper cutting tool plate onto the plastic films from above to cut the plastic films.

A combined welding / cutting tool allows in addition to the advantages shown for the process management further advantages such as no re-positioning of welded plastic bags against a cutting tool must be made.

Also according to the invention a method for producing plastic bags, in which several layers Plastic film in a combined welding / cutting tool over a lower mold plate with a first temperature below the softening temperature of the material of the plastic film. An upper tool plate with a second temperature then supplies at least locally and within outreach Time the necessary heat for fusing the plastic films.

Advantageous becomes the first temperature in the area of the lower tool plate held constant and the second temperature of the upper die plate at least in the area of the upper tool plate in which the plastic films welded should be kept constant.

Of the Process step of welding, cutting and / or combined welding and cutting can by a transport system with grippers can be shortened. preferably, A first gripper and / or a second gripper move around it closing, closed and / or opening Welding tool, Cutting tool and / or combined welding / cutting tool. The first Gripper and / or the second gripper take during the welding process, Cutting process and / or combined welding / cutting process the one or several layers of plastic film and pull the plastic film After opening the welding tool, Cutting tool and / or combined welding / cutting tool into the welding tool, Cutting tool and / or combined welding / cutting tool into it. This will the tact time is shortened, since the grasping already during of the step and not just after the step a gripper through the welding tool, cutting tool and / or combined welding / cutting tool is driven through. Such a gripping system can by means of a parallel guide for mechanical Gripper at the side next to the welding tool, cutting tool and / or combined welding / cutting tool accomplished become.

Therefore, according to the invention to improve the procedure following operations and procedures at the same time and with very short distances in one and the same workstation the device for the production of plastic bags (the workstation includes the welding / cutting tool and the parallel to the tool guided gripping device) are performed: a) the exact contour production of plastic bag welds and b) the welding a plastic element and c) the free cutting of the welded plastic bag out of the plane the plastic films and d) the exact separation of the remaining pieces of the used plastic films from the new feeder end of the still fresh (unwelded) plastic films and e) the time-shortening Prepare the next Work cycle by the gripper device for the plastic film transport during the execution the operations a) to d) from the output side of the tool to the input side of Tool reversed.

By the time and place same implementation of aforementioned operations in only one work station of the plastic bag making machine at only one dormant piece of plastic film also become fit problems avoided so far in succession in different Workstations performed operations have resulted, e.g. due to machine tolerances and / or strains the plastic films from one workstation to the next workstation.

In a preferred embodiment of the method hold the first and / or the second gripper the one or more layers of plastic film during closing of the Welding tool, cutting tool and / or combined welding / cutting tool. This can e.g. through recesses on the welding tool, cutting tool and / or combined welding / cutting tool allows be, wherein the first and / or the second gripper in the recesses be retracted. With this arrangement of first gripper and / or second gripper in the tool recesses, i. still within the outer tool dimensions are the supplied to the tool Plastic films used optimally. The plastic film transport routes are smaller, and the plastic film blend is smaller.

The described apparatus and method may be according to the expert adapted and supplemented when in addition to the combined welding / cutting tool Beginning of the welding process at least one weldable Plastic element (preferably inserted as a dimensionally stable insert) becomes. By a plastic element, a port can be formed. The plastic insert becomes in the area of an outer seam of the plastic bag (s) to be produced with the plastic films welded becomes.

It already belongs to the state of the art, with known plastic bag manufacturing method additionally with a plastic element for forming a port or a hose lug in an outer seam of the plastic bag to be produced with to weld. Such a plastic insert is usually a dimensionally stable insert or a spring-back in a stable output form insert.

So far It was common in the art, for the further Handling and onward transport of the finished-welded plastic bags up to a filling station and closing the filling openings at least one transfer station provided. Vacuum cups remove the finished welded plastic bags from the welding / cutting tool. The plastic bags are then to a moving receiving gripping and Transfer unit, whereby handover inaccuracies arise can, to an inaccurate positioning of the plastic bag or their filling openings in the filling station to lead can. In a preferred embodiment of the invention with nests can Such positioning inaccuracies are reduced. The Plastic elements are placed in nests and combined in the Welding / cutting tool retracted. The finished welded Plastic bag is made from the combined welding / cutting tool drove out through the nest.

One inventive process, with the holder of the plastic bag on the plastic elements, also allows that the filled and sealed plastic bag by means of one, preferably positionally accurate moveable rotating angle precisely rotatable, transport gripper in one flexible plastic bag can be introduced. there are incorrect assignment positions between the already filled and sealed plastic bag and the plastic transfer bag avoided, which have led in practice to the fact that when welding the Bag of the already filled and sealed plastic bag has been damaged.

Description of the drawings

1 shows a sketch of an embodiment of an apparatus for producing plastic bags

2 schematically shows a plastic bag with port

3 schematically shows a welding tool

4 schematically shows a cutting tool

5a ) and b) show schematically a combined welding / cutting tool

6a ) to d) shows schematically the process sequence when driving around a combined welding / cutting tool by a first gripper and a second gripper.

7 , No. 1 to 10, shows in detail a manufacturing process on a combined welding / cutting tool

8th schematically shows a metering valve for filling plastic bags

9 shows in detail the manufacturing process of swinging the plastic bag from the horizontal to the vertical position after the welding / cutting process

detailed invention description

1 shows an example of a device 350 for the production of plastic bags 330 and the associated manufacturing process. An example of a plastic bag 330 is in 2 shown. Further figures show more detailed individual components and / or method sequences of the device or of the production method. Two layers of a plastic film 120 . 130 be from a foil dispenser 340 made available. The plastic films 120 . 130 be doing of a drum 342 unrolled. As a plastic film 120 . 130 For example, serve a three-layer polypropylene film.

A three-layer polypropylene film may be made of polypropylene and copolymers. Such a three-layered polypropylene film may be coextruded with an outer protective layer, a middle barrier layer and an inner layer for welding. In the device 350 lie the two inner layers of the two plastic films 120 . 130 on each other and the two layers of plastic films 120 . 130 are together on the drum 342 rolled up.

From the foil dispenser 340 get the plastic films 120 . 130 to a foil printing unit 260 , in the film printing unit 260 be on the plastic films 120 . 130 Information about the material of the plastic films 120 . 130 , the date of manufacture and ingredients for the plastic bags to be manufactured 330 printed.

The two layers of plastic film 120 . 130 arrive from the foil printing unit 260 to the combined welding / cutting tool 90 , Also in the combined welding / cutting tool 90 become plastic elements 250 lying on a nest 180 held, introduced.

Several of the nests 180 are fixed on a first belt and can with the first Belts are transported. The advance of the nests 180 is time with the beat of the combined welding / cutting tool 90 coordinated. The feed stops during the welding / cutting step. A device fills the nests 180 with plastic elements 250 , The filling can eg by pushing into a fit in the nests 180 happen. The filling takes place in the standstill phase during a welding / cutting step.

In one of the nests 180 can have one or more plastic elements 250 being held. In the illustrated case, two plastic elements 250 in the nest 180 being held. The plastic elements 250 have an upper position and a lower position where they are in the nest 180 can be kept. Alternatively there is a possibility that the nests 180 itself or parts of the nests 180 have an upper position and a lower position. In the example, the plastic elements 250 held in the upper position. In the upper position, the nests can 180 the plastic elements 250 over the lower tool plate 100 of the combined welding / cutting tool 90 to lead. In the lower position of the plastic elements 250 in the nest 180 can the combined welding / cutting tool 90 getting closed.

The plastic elements 250 go through a preheating station in front of the combined welding / cutting tool 270 , The plastic elements 250 are on the nests 180 , In the preheating station 270 can the plastic elements 250 for a shortened and improved welding step in the combined welding / cutting tool 90 to be heated. The process is carried out so that during the cutting / welding step, the plastic elements 250 , attached to the next plastic bags 330 in the next cutting / welding step to be installed in the preheating station 270 are located. The preheating station 270 is constructed so that four plastic elements 250 that are in two nests 180 can be heated at the same time.

After or when opening the combined welding / cutting tool 90 the feed of the first belt is restarted. The four plastic elements 250 on the two nests 180 be in the combined welding / cutting tool 90 brought in.

In the combined welding / cutting tool 90 become the plastic elements 250 with an end region between the two layers of plastic films 120 . 130 on changing and. In the illustrated embodiment of the invention, four plastic elements 250 for forming four ports on two plastic bags 330 in the combined welding / cutting tool 90 brought in. The plastic films 120 . 130 are largely on a lower tool plate 100 , The flat lower tool plate 100 is maintained at a constant temperature of about 100 ° C with heating elements. This temperature is below the softening temperature of the plastic films 120 . 130 , This allows the plastic films 120 . 130 easily over the lower tool plate 100 slide without "sticking" on it The lower tool plate 100 is made of hard and / or hardened steel. The lower tool plate 100 is replaceable and immovable on the device 350 assembled.

In the areas of the lower tool plate 100 in which the plastic elements 250 on the lower plastic film 130 lie on, are inserts 380 in the lower tool plate 100 , The stakes 380 have a recess to when pressing the upper die plate 110 on the lower tool plate 100 the thickness of the plastic elements 250 compensate. The stakes 380 have one from the rest of the lower tool plate 100 Separately controllable heating. In a preferred embodiment, an insert is taking 380 with two wells 2 plastic elements 250 for a plastic bag 330 on. The separately controllable heating helps the plastic elements 250 to the plastic film 120 . 130 , in particular to the lower plastic film 130 to weld. With the separately controllable heating can in the range of the inserts 380 the lower tool plate 100 Temperatures, eg 140 ° C, above the melting temperature of the materials used for the plastic films 120 . 130 be achieved. The stakes 380 in the lower tool plate 100 are interchangeable and immovable on the device 350 assembled. The stakes 380 can for other forms of plastic bags 330 be replaced or replaced due to wear.

The upper tool plate 110 of the combined welding / cutting tool 90 includes a steel backing plate on which one with welding forms 40 shaped aluminum hotplate 115 and separators which are a cutting die 80 form, are mounted. As separators serve knife-like steel pieces, which are the Kunsststofffolien 120 . 130 cut through and so the plastic bag 330 from the plastic films 120 . 130 cutting out. The shaped aluminum hotplate 115 has a fast temperature control, with the temperatures, eg 140 ° C, above the melting point of the materials used in the plastic films 120 . 130 can be adjusted and kept. The aluminum hotplate 115 has, like the lower tool plate 100 , Depressions in the area in which they move together the combined welding / cutting tool 90 on the plastic elements 250 is pressed. The separation devices, which are the cutting shape 80 as well as the molded aluminum heater plate 115 can be replaced. By replacing the separators and the aluminum hotplate 115 Different shapes of plastic bags can be made or worn tool parts can be replaced.

The upper tool plate 110 is at the device 350 connected to pressing devices. This allows the upper tool plate 110 on the immovably mounted lower tool plate 100 be pressed.

When squeezing the, through the lower tool plate 100 preheated, plastic films 120 . 130 with the in the preheating station 270 preheated plastic elements 250 by the heat in the inserts 380 the lower tool plate 100 and the aluminum hotplate 115 the upper tool plate 110 welded and through the separating devices along the cutting mold 40 cut. In this embodiment, the cutting operation is only partially performed. The essentially cut out plastic bag 250 still hang with the remains of the plastic films 120 . 130 together. The plastic elements 250 when moving together the combined welding / cutting tool 90 pressed in the lower position. In the lower position, the plastic elements are then at least partially in the recess of the inserts 380 the lower tool plate 100 ,

The manufactured plastic bag 330 are then removed from the combined welding / cutting tool 90 on the nests 180 pulled out. These are now on the plastic bag 330 attached plastic elements 250 back to the upper position of the nests 180 pressed and the feed of the first belt is actuated. Together with the nests 180 become the retained plastic elements 250 , In the example, the two plastic elements 250 that with a plastic bag 330 are held in a nest, and thus the plastic bag 330 from the combined welding / cutting tool 90 pulled out. The remains of plastic films 120 . 130 still with the plastic bags 330 are at least partially related, are also from the combined welding / cutting tool 90 pulled out.

The manufactured plastic bag 330 become at the nests of a Nachschweißstation 280 fed. In the secondary welding station 280 becomes the connection of the plastic elements 250 with the from the plastic films 120 . 130 manufactured plastic bag 330 reheated. By reheating the connecting area of the plastic elements 250 with the plastic bags 330 the connection area is further sealed.

While the plastic bag 330 at the nests 180 A remover removes the remnants of the plastic films 120 . 130 and tear them from the plastic bags 330 from. The removal can be done for example with a third gripper. During the standstill break of a welding / cutting step (ie the first belt and thus the nests 180 are not moved) the third gripper grasps the remnants of the plastic films with gripper fingers 120 . 130 and tear away the remains of those at the nests 180 held plastic bags 330 from.

In the described embodiment of the invention, the plastic bags 330 then in a transfer station 290 from the nests 180 pushed out, swung from the horizontal to the vertical and to other nests 185 to hand over. In the other nests 185 , which are on a second belt, are the plastic bags 330 the bag filling machine 300 fed.

In the filling machine 300 become filling devices 310 put on or over the ports and a liquid 200 can in the plastic bag 250 be filled. In the described embodiment, the filling at both ports of a plastic bag 330 made at the same time. The dosage of the amount of liquid 200 may in one embodiment via a timing of a metering valve 190 (in 8th shown) happen. So that in equal periods equal amounts of liquid 200 can be filled, the liquid 200 with a pressure equalization tank 320 maintained at constant pressure (between 2 and 6 bar). As an alternative to timing, a mass flow measuring system may be present between the pressure equalizing tank and the metering valve. The mass flow meter measures the liquid and closes the dosing valve 190 Once the desired amount of liquid 200 is filled in the bag. With this mass flow measuring system, the accuracy of the dosage can be increased even more. After filling the plastic bags 330 , still at the other nests 180 , fed to a closure station. In the sealing station, the plastic bags 330 to be closed with caps. The closure with caps can be made by pressing on caps with seals. Alternatively, a closure station is possible in the caps on the plastic bag 330 be welded.

In 2 is a plastic bag 330 with two by plastic elements 250 port formed formed. The plastic elements 250 are between two layers of plastic film 120 . 130 shrink wrapped. Such a plastic bag 330 may include volumes between typically 100 ml and 3000 ml. The inner border of the plastic bag 330 is by the welding of the plastic bag 330 Are defined. The outer border is made by cutting the plastic bag 330 Are defined.

In 3 , is a welding tool 10 and in 4 is a cutting tool 50 for the device 350 for the production of plastic bags 330 shown. In 5a ) and b) is a combined welding / cutting tool 90 for a device 350 for the production of plastic bags 330 shown. All three tools 10 . 50 . 90 each have a lower resting plate (the lower welding tool plate 20 , the lower cutting tool plate 60 and the lower tool plate 100 ) and a movable upper plate which can be pressed onto the lower resting plate (the upper welding tool plate 30 , the upper cutting tool plate 70 and the upper tool plate 110 ). The following are preferred embodiments of the preferred combined welding / cutting tool 90 described.

The lower tool plate 100 of the combined welding / cutting tool 90 is as resting on the device 350 attached plate made of hardened steel. The lower die plate is about 500 mm wide and 500 mm long with a thickness of about 10 mm. The lower tool plate 100 is equipped with a heating device, eg electric heating coils, and equipped with one or more surface temperature sensors. With the data of the temperature sensor can the heating and thus the temperature of the lower tool plate 100 be managed. Preferably, the temperature of the lower die plate 100 set to a constant value. In a preferred embodiment, the lower die plate comprises 100 an insert 380 in an area where plastic elements 250 to the plastic bag 330 to be welded. This use 380 may be made of a different material than the lower tool plate 100 be made of, for example, aluminum. The use 380 can with one of the heating of the lower tool plate 90 separate heating, temperature sensing and temperature control. The use 380 in 5b ) has a plastic element to be welded 250 adapted recess. The recess faces a corresponding recess in the molded upper tool plate. Through the depressions, the combined welding / cutting tool 90 , despite an intermediate portion of a plastic element 250 , so far are brought together that the plastic films 120 . 130 be compressed.

The shaped upper tool plate 110 of the combined welding / cutting tool 90 includes in 5b ) Separators, knife-like as a cutting mold 80 are formed. These separators are preferably unscrewable on the upper die plate 110 appropriate. The separation devices can be used with desired modified shapes and / or sizes of plastic bags 330 be replaced. The separators can be replaced when worn, eg blunting. On the upper tool plate is in 5b ) a welding mold 40 appropriate. The welding form 40 is preferably made of aluminum to allow a high Temperturregelgeschwindigkeit. The welding form 40 includes a heating system, eg electric heating coils, and near-surface temperature sensors. Preferably, a fast temperature control for the upper die plate 110 possible. This allows a preset temperature even when moving the upper tool plate 110 on the lower tool plate 100 and the resulting heat transfer or the changed Temperaturabstrahlverhältnissen be maintained.

In the welding form 40 Contours are incorporated, along which the plastic films 120 . 130 be welded together. The welding form 40 has one to the recess in the insert 380 in the lower tool plate 100 corresponding recess. The welding form 40 is preferably interchangeable, eg with screw, on the upper tool plate 110 appropriate.

In 6a ) to d) is a diagram showing the effect of a gripping system 155 to speed up the workflow on a combined welding / cutting tool 90 illustrated. The scheme provides a bird's-eye view of the upper die plate 110 represents.

In 6a ) is the state in which the combined welding / cutting tool 90 for the welding / cutting process is compressed and the first gripper 160 and the second gripper 170 from the combined welding / cutting tool 90 have gone out. The two layers of plastic film 120 . 130 lie compressed in the combined welding / cutting tool 90 and are cut and welded together.

In 6b ) is the first gripper 160 and the second gripper 170 around the combined welding / cutting tool 90 lead around and grab the plastic films 120 . 130 ,

The step of getting around the combined welding / cutting tool 90 still happens during the welding / cutting process. This can shorten the time to reinsert a piece of plastic film.

After opening the combined welding / cutting tool 90 , and removal of the cut and welded plastic bags, become the plastic films 120 . 130 from the first gripper 160 and the second gripper 170 in the combined welding / cutting tool 90 drawn. The lower tool plate 100 and the upper tool plate 110 include recesses for the first gripper 160 and the second gripper 170 , This allows the combined welding / cutting tool 90 be closed while the first gripper 160 and the second gripper 170 the plastic films 120 . 130 holders ( 6c ).

The first gripper 160 and the second gripper 170 are then in 6d ) from the combined welding / cutting tool 90 moved out, which again sets the starting situation.

7 Nos. 1 to 10 show in detail the procedure in the combined welding / cutting process. The individual work steps are shown from above and from the side.

In # 1 is the combined welding / cutting tool 90 opened, with manufactured plastic bags 330 shown. A first gripper 160 is located in front of the combined welding / cutting tool and has the two layers of plastic film 120 . 130 taken.

In No. 2 is again the open combined welding / cutting tool 90 shown. The first gripper 160 has the two layers of plastic film 120 . 130 pulled through the combined welding / cutting tool. The first gripper 160 is located at the end of the combined welding / cutting tool 90 and holds the two layers of plastic film 120 . 130 firmly.

No. 3 shows the now closed combined welding / cutting tool. The first gripper 160 holds the plastic films 120 . 130 still firm. The first gripper 160 is located in a recess in the combined welding / cutting tool. The plastic films 120 . 130 be through the combined welding / cutting tool 90 pressed together.

As the welding / cutting process progresses, the first gripper becomes 160 opened in No. 4. In No. 5 becomes the first gripper 160 from the combined welding / cutting tool 90 pulled out and in No. 6 at the beginning or before the combined welding / cutting tool 90 emotional.

In No. 7 is shown how the still open first gripper 160 again in the direction of the combined welding / cutting tool 90 goes and the plastic films 120 . 130 embraces.

In No. 8 becomes the first gripper 160 around the plastic films 120 . 130 closed.

In No. 9 becomes the combined welding / cutting tool 90 opened after completed welding / cutting process. The plastic films 120 . 130 can then after removal of the manufactured plastic bag 330 and any remains of plastic films 120 . 130 back into the open combined welding / cutting tool 90 be involved.

The illustrated first gripper 160 is preferably designed as a mechanical gripper, which grips the plastic films between two fingers.

The movement of the first gripper 160 can be pneumatic, hydraulic or electric motors. The movement of the first gripper 160 can be done along a rail. The second gripper 170 is similarly formed.

Preferably, the remains are still slightly coherent with the manufactured plastic bags 330 from the combined welding / cutting tool 90 taken. The plastic bags 330 then outside the combined welding / cutting tool 90 separated from the remains. The separation of remnants and plastic bags 330 can be done for example by an unillustrated third gripper. The third gripper grips the coherent remains and rips the remnants from the plastic bags held on the nests 330 from.

This in 8th Pictured metering valve 190 for the bag filling machine 300 includes a valve punch 230 , The metering valve 190 is designed as a diaphragm valve. The valve stamp 230 presses on a membrane 235 , The membrane 235 seals in the closed state of the metering valve 190 two pipe openings 240 from. The space 210 of the metering valve 190 is with the liquid to be dosed 200 filled, which is added under constant pressure. When opening the dosing valve 190 the liquid flows 200 through the two pipe openings 240 in the two supply lines 220 , The liquid 200 flows in each case into a supply line 220 per port. To the dripping of supply lines 220 to avoid the diameters of the supply lines 220 so chosen that the liquid 200 due to their surface tension can get stuck on the supply line. This sets an upper diameter of about 5 mm. Since the supply lines are to be accessible for cleaning, the minimum diameter is limited to approximately 1 mm. Typical inner diameters of the leads are about 3 mm. Larger inner diameters can indeed be realized, but then sieve attachments are necessary to avoid dripping. Screen attachments themselves are difficult to clean, must be replaced and can break the liquid through Bruchstü of the sieve. A metering valve 190 as in 8th has a size of about 60 mm in diameter with a total length of about 200 mm. Several dosing valves can be combined to form an assembly for simultaneously filling a plurality of plastic bags. For driving the metering valve 190 the known methods are available electromagnetically and / or pneumatically. The dosage from the metering valve 190 occurs at constant fluid pressure over the outflow time, ie the period in which the metering valve 190 is open. The required outflow time can be determined by means of a mass flow system.

An advantage of the described embodiment of the metering valve is the avoidance of possibly different switching times in contrast to two metering valves. This can avoid inaccuracies. Also when sterilizing the device 350 there are advantages. With two metering valves, unnoticed incomplete opening of one of the two metering valves could result in unnoticed incomplete sterilization of the incompletely opened valve. With the described arrangement can be achieved so better that the steam passage in sterilization reaches all areas equally.

9 Nos. 1 to 6 show the process of swinging the plastic bags 330 from the horizontal to the vertical position with the ports of the plastic bag 330 up. The rotation of the plastic bag 330 is performed in front of the bag filling machine. Nos. 1 to 6 show the process in two side views, respectively.

In No. 1 there are two plastic bags 330 in a horizontal position. The plastic bags are through the nests 180 on the plastic elements 250 supported. The plastic bag 330 be in No. 2 from the nests 180 in a holder 400 pushed.

In No. 3 are the holders 400 , and with it the plastic bags 330 , panned. Panning the holders 400 is performed in No. 5.

In No. 6 is shown how the plastic bag 330 again from the holders 400 to another nests 185 be pushed out. The other nests 185 are attached to a second belt.

In the vertical position, the plastic bags can 330 then to the bag filling machine 300 to be brought.

This method of swinging the plastic bag 330 avoids the previous use of a mandrel, which has been pushed into the interior of the plastic element. This could cause contamination within the plastic bag 330 arise.

10

welding tool

20

Lower Welding tool plate

30

Upper Welding tool plate

40

welding shape

50

cutting tool

60

Lower Cutter plate

70

Upper Cutter plate

80

cutting shape

90

combined Welding / cutting tool

100

Lower tool plate

110

Upper tool plate

115

Aluminiumheizplatte

120

Plastic film

130

Plastic film

140

Surface of the lower cutting tool plate

150

Surface of the lower tool plate

155

gripping system

160

first grab

170

second grab

180

nest

190

metering valve

200

liquid

210

room of the metering valve

220

leads

230

valve stem

235

membrane

240

supply ports

250

Plastic element

260

Folienbedruckeinheit

270

preheating

280

Nachschweißstation

290

transfer station

300

bag-filling

310

filling devices

320

Accumulator Tank

330

Plastic bags

340

foil dispenser

350

contraption for the production of plastic bags

360

Inner border

370

Outer border

380

commitment

390

finger

400

holder

Claims (49)

Contraption ( 350 ) for the production of plastic bags ( 330 ) made of plastic film ( 120 . 130 ) with i.) one or more film dispensers ( 340 ) for the provision of plastic films ( 120 . 130 ); ii.) one or more port dispensers for providing plastic elements ( 250 ); iii.) a combined welding / cutting tool ( 90 ) for a) attaching the plastic elements ( 250 ) to the plastic bags ( 330 ) to form ports; b) welding together the plastic films ( 120 . 130 ) on a welding mold ( 40 ); and c) cutting the plastic films ( 120 . 130 ); iv.) another welding tool ( 280 ) for re-welding the ports; and v :) a transfer station ( 290 ) to take over the plastic bag ( 330 ) for further processing. Contraption ( 350 ) for the production of plastic bags ( 330 ) according to claim 1, with a preheating station ( 270 ) for the plastic elements ( 250 ). Contraption ( 350 ) for the production of plastic bags ( 330 ) according to one of claims 1 to 2, wherein the device ( 350 ) a film printing unit ( 260 ). Contraption ( 350 ) for the production of plastic bags ( 330 ) according to one of claims 1 to 3, wherein the combined welding / cutting tool ( 90 ) in a manufacturing step 2 ports each to 2 plastic bags ( 330 ). Contraption ( 350 ) for the production of plastic bags ( 330 ) according to one of claims 1 to 4 with a bag filling machine ( 300 ) for filling the plastic bag ( 330 ) with a liquid ( 200 ). Contraption ( 350 ) for the production of plastic bags ( 330 ) according to claim 5, wherein the bag filling machine ( 300 ) i.) one or more filling devices ( 310 ) for the plastic bags ( 330 ); ii.) a surge tank ( 320 ) for the liquid ( 200 ); and iii.) a bag closure station. Contraption ( 350 ) according to one of claims 5 and 6, with a pivoting device, through which in front of the bag filling machine ( 300 ) the plastic bags ( 330 ) with the ports can be turned upwards. Contraption ( 350 ) for the production of plastic bags ( 330 ) according to one of claims 1 to 7, with a repacking machine for packaging the plastic bag ( 330 ) in an outer plastic wrapper, wherein the repackaging packaging machine comprises one or more second foil dispensers for providing plastic wrapper foil. Combined welding / cutting tool ( 90 ) for the production of plastic bags, the combined welding / cutting tool ( 90 ) i.) a resting, substantially flat lower tool plate ( 100 ) and ii.) a movable, shaped, upper tool plate ( 110 ), and wherein the lower die plate comprises one or more inserts 380 includes. Combined welding / cutting tool ( 90 ) according to claim 9, wherein said one or more inserts ( 380 ) of a different material than the lower tool plate ( 100 ) are made. Combined welding / cutting tool ( 90 ) according to one of claims 9 and 10, wherein the inserts ( 380 ) Comprise aluminum as material. Combined welding / cutting tool ( 90 ) according to one of claims 9 to 11, wherein the inserts ( 380 ) one of the lower tool plate ( 100 ) comprise separate heating. Combined welding / cutting tool ( 90 ) according to one of claims 9 to 12, wherein the inserts ( 380 ) in use warmer than the lower tool plate ( 100 ) are. Combined welding / cutting tool ( 90 ) according to one of claims 9 to 12, wherein the upper tool plate ( 110 ) of the device separation devices ( 80 ) for one or more layers of plastic film ( 120 . 130 ), wherein the separation devices ( 80 ) softer than the surface ( 140 . 150 ) of the lower tool plate ( 100 ) are. Combined welding / cutting tool ( 90 ) according to one of claims 9 to 14, wherein the upper die plate 110 a welding mold ( 40 ). Combined welding / cutting tool ( 90 ) according to claim 15, wherein the welding mold ( 40 ) is made of aluminum. Combined welding / cutting tool ( 90 ) according to one of claims 14 to 16, wherein the separating device ( 80 ) releasably on the upper tool plate ( 110 ) is attached. Welding tool ( 10 ) for connecting two layers of plastic film ( 120 . 130 ), wherein the welding tool ( 10 ) i.) a lower welding tool plate ( 20 ) with a first temperature in use and ii.) an upper welding tool plate ( 30 ) having a second temperature in use; and iii.) the first temperature below the softening temperature of the material or materials of the plastic films ( 120 . 130 ) and iv.) the second temperature at least in subregions of the upper welding tool plate ( 30 ) at least temporarily above the melting temperature of the material or materials of the plastic films ( 120 . 130 ) lies. Combined welding / cutting tool ( 90 ) for connecting two layers of plastic film ( 120 . 130 ), wherein the combined welding / cutting tool ( 90 ) i.) a lower tool plate ( 100 ) with a first temperature in use and ii.) an upper tool plate ( 110 ) having a second temperature in use; and iii.) the first temperature below the softening temperature of the material or materials of the plastic films ( 120 . 130 ) and iv.) the second temperature at least in subregions of the upper tool plate ( 110 ) at least temporarily above the melting temperature of the material or the materials of the plastic films ( 120 . 130 ) lies. Combined welding / cutting tool ( 90 ) according to claim 19, wherein in use the first temperature is substantially constant in time and below the softening temperature of the material or materials of the plastic film ( 120 . 130 ) lies. Combined welding / cutting tool ( 90 ) according to any one of claims 19 and 20, wherein in use the first temperature over a substantial portion of the lower die plate ( 100 ) is constant and below the softening temperature of the material or materials of the plastic film ( 120 . 130 ) lies. Combined welding / cutting tool ( 90 ) according to one of claims 19 to 21, wherein in use the second temperature is substantially constant over time and at least in subregions of the upper tool plate ( 110 ) above the melting temperature of the material or materials of the plastic films ( 120 . 130 ) lies. Combined welding / cutting tool ( 90 ) according to any one of claims 19 to 22, wherein in use the second temperature over a substantial area of the upper die plate ( 110 ) is constant and above the melting temperature of the material or materials of the plastic film ( 120 . 130 ) lies. Contraption ( 350 ) for the production of plastic bags ( 330 ) according to one of claims 1 to 8, wherein the device comprises a gripping system ( 155 ), wherein the gripping system ( 155 ) i.) on the closed combined welding / cutting tool ( 90 ) and ii.) the one or more layers of plastic film ( 120 . 130 ) into the opened welding / cutting tool ( 90 ) can draw. Contraption ( 350 ) for the production of plastic bags ( 330 ) according to claim 24, wherein the gripping system ( 155 ) a first gripper ( 160 ). Contraption ( 350 ) for the production of plastic bags ( 330 ) according to one of claims 24 or 25, wherein the gripping system ( 155 ) a second gripper ( 170 ). Device according to one of claims 24 or 25, wherein the first gripper ( 160 ) on one side and / or the second gripper ( 170 ) on another side of the combined welding / cutting tool ( 90 ) is passed. Device according to one of claims 24 to 27, wherein the first grippers ( 160 ) and / or the second grippers ( 170 ) are designed as mechanical grippers, wherein the first gripper ( 160 ) and the second gripper ( 170 ) one or more layers of plastic film ( 120 . 130 ). Device according to one of claims 24 to 28, wherein the combined welding / cutting tool ( 90 ) Comprises recesses such that the combined welding / cutting tool can be closed while the first gripper ( 160 ) and / or the second gripper ( 170 ) the one or more layers of plastic films ( 120 . 130 ) in the inner area of the combined welding / cutting tool ( 90 ). Device for producing plastic bags ( 330 ), the nests ( 180 ), whereby the nests ( 180 ) i.) Plastic bag ( 330 ) after passing through one or more layers of plastic film ( 120 . 130 ) by a combined welding / cutting tool ( 90 ) are made and can hold and ii.) the device is constructed such that the nests ( 180 ) the manufactured plastic bags up to a transfer station ( 290 ) can hold. Device according to claim 30, wherein the i.) Plastic bags ( 330 ) are provided with ports and ii.) the nests ( 180 ) the plastic bags ( 330 ) in the area of the ports. Contraption ( 350 ) for the production of plastic bags ( 330 i) where i.) plastic elements ( 250 ) in nests ( 180 ) are introduced; ii.) the plastic elements ( 250 ) lying in the nests to a combined welding / cutting tool ( 90 ) to get promoted; iii.) the plastic elements ( 250 ) in the nests ( 180 ) remain during a welding / cutting step; and iv.) on the plastic elements ( 250 ) attached plastic bags ( 330 ) with the nests ( 180 ) are moved out of the combined welding / cutting tool. Contraption ( 350 ) for the production of plastic bags ( 330 ) according to one of claims 1 to 8, additionally comprising a filling station for filling plastic bags; which comprise at least two ports, wherein the filling station i.) a metering valve ( 190 ) and ii.) a liquid ( 200 ) directly from the room ( 210 ) of the metering valve on supply lines ( 220 ) is distributed to the at least two ports. Contraption ( 350 ) for the production of plastic bags ( 330 ) according to claim 33, wherein with a membrane ( 235 ) all supply openings ( 240 ) to the supply lines ( 220 ) are closable. Process for the production of plastic bags ( 330 i.) where i.) plastic films ( 120 . 130 ) from one or more film dispensers ( 340 ) are taken; ii.) plastic elements ( 250 ) are provided by one or more port donors; iii.) in a combined welding / cutting device ( 90 ) a) plastic elements ( 250 ) to the plastic bags ( 330 ) are attached; b) the plastic films ( 120 . 130 ) are welded together at a contour; and c) the plastic films ( 120 . 130 ) get cut; iv.) the plastic elements ( 250 ) at a secondary welding station ( 280 ) are rewelded; and v.) the plastic bags ( 330 ) at a transfer station ( 290 ). A method according to claim 35, wherein the plastic film ( 120 . 130 ) by the combined welding / cutting tool ( 90 ) introduced substantially horizontally and / or by the combined welding / cutting tool ( 90 ) is carried out. Method according to one of claims 35 and 36, wherein the plastic elements ( 250 ) prior to attachment to the plastic bags ( 330 ) in the combined welding / cutting tool ( 90 ) are preheated. Method according to one of claims 35 to 37, wherein one or more plastic films ( 120 . 130 ). Method according to one of claims 35 to 38, wherein in the combined welding / cutting tool ( 90 ) each 2 plastic elements ( 250 ) to 2 plastic bags ( 330 ). Method according to one of claims 35 to 39, wherein the plastic bags ( 330 ) with a liquid ( 200 ). Method according to one of claims 35 to 40, wherein the plastic bags ( 330 ) are closed. Method according to one of claims 35 to 41, wherein the plastic bags ( 330 ) in front of the bag filling station ( 300 ) with the ports turned up. Method according to one of claims 35 to 42, wherein the plastic bags ( 330 ) are packed in a bag. Process for the production of plastic bags ( 330 ) with a combined welding / cutting tool ( 90 ), wherein two layers of plastic film ( 120 . 130 ) by connecting an upper tool plate ( 110 ) and a lower tool plate ( 100 ), i.) a lower tool plate ( 100 ) having a first temperature in use below the softening temperature of the material or materials of the plastic films ( 120 . 130 ) and ii.) an upper tool plate ( 110 ) with a second temperature in use, which at least in subregions of the upper tool plate ( 110 ) at least temporarily above the softening temperature of the material or materials of the plastic films ( 120 . 130 ) is brought. Process for the production of plastic bags according to claim 44, wherein the first temperature is set at 90 ° C to 110 ° C becomes. Process for the production of plastic bags according to one of the claims 44 or 45, wherein the second temperature is set to 120 ° C to 140 ° C. Process for the production of plastic bags according to one of the claims 44 to 46, wherein the first temperature is set to about 100 ° C and the second Temperature to about 130 ° C set becomes. Process for producing plastic bags according to one of Claims 35 to 47, in which a gripping system ( 155 ) with a first gripper ( 160 ) and / or a second gripper ( 170 ) on an at least partially closed combined welding / cutting tool ( 90 ) passes by, one or more layers of plastic films ( 120 . 130 ) before the combined welding / cutting tool and after opening the combined welding / cutting tool ( 90 ) in the combined welding / cutting tool ( 90 ). A process for producing plastic bags according to claim 48, wherein the first gripper ( 160 ) and / or the second gripper ( 170 ) in recesses in the welding / cutting tool ( 90 ) and retract the plastic film until the welding / cutting tool ( 90 ) hold.