Method for Producing Film from a Total Quantity of Raw Materials Using a Film Extrusion Machine, and Computer Program Product for Carrying Out the Method

Abstract

The invention relates to a method for producing a film from a total quantity of raw materials using an extrusion machine, comprising the following steps: detecting machine parameters relating to properties and/or settings of at least one film extrusion machine, detecting film parameters relating to desired properties of the film, detecting raw material parameters relating to properties of the raw materials, inputting the detected parameters in a film production model, calculating a selection and/or an amount of raw materials from the total quantity of raw materials based on the detected parameters and the film production model, outputting information relating to the selection and/or the amount of raw materials.

Claims

1. A method for producing a film from a total quantity of raw materials using an extrusion machine, comprising the following steps: detecting machine parameters relating to properties and/or settings of at least one film extrusion machine, detecting film parameters relating to desired properties of the film, detecting raw material parameters relating to properties of the raw materials, inputting the detected parameters in a film production model, calculating a selection and/or an amount of raw materials from the total quantity on raw materials based on the detected parameters and the film production model, outputting information relating to the selection and/or the amount of raw materials.

2. The method according to according to claim 1, additionally comprising the following step: specifying a recommendation of a film extrusion machine on which the film is produced.

3. The method according to according to claim 1, additionally comprising the following step: calculating the expected properties of the film based on the film production model.

4. The method according to claim 1, additionally comprising the following step: considering previous orders when calculating the selection and/or amounts of raw materials.

5. The method according to claim 1, additionally comprising the following steps: detecting batch-specific properties of at least a part of the raw materials, considering said batch-specific properties, calculating a selection and/or amount of raw materials.

6. The method according to claim 1, additionally comprising the following steps: detecting at least one property of the film, calculating the deviation of said property from the expected property of the film, inferring at least one property of a raw material.

7. A computer program product comprising instructions which, when the program is executed on a computer, cause the computer to carry out the steps of a method comprising the features of claim 1.

Description

[0037] Also the subject of the present invention is a computer program product comprising instructions which, when the program is executed on a computer, cause the computer to carry out the steps of a method according to the invention. Thus, a computer program product according to the invention has the same advantages as those explained in detail with reference to a method according to the invention.

[0038] FIG. 1 schematic illustration of a film extrusion machine,

[0039] FIG. 2 schematic illustration of a different film extrusion machine,

[0040] FIG. 3 schematic illustration of the sequence of a method according to the invention.

[0041] FIG. 4 schematic illustration of the sequence of a method according to the invention with an addition.

[0042] In FIGS. 1 and 2, film extrusion machines 10 are shown by way of example. The film extrusion machines have in common that they are equipped with extruders 20. Each individual extruder supplies the film extrusion machines with melted plastic material for a layer of the subsequent film. For this purpose, a first extruder is supplied with one or more raw materials R1, . . . via dosing devices 60, a second extruder is supplied with one or more raw materials Rx . . . in said manner. The raw materials are generally provided in the form of plastic granulate. The type and/or amount of the supplied raw materials are predetermined by the method according to the invention.

[0043] The method according to the invention can be carried out using a cast film or a blown film extrusion line according to FIG. 2. FIG. 1 shows a blown film line comprising the already described extruders 20. A film web or film 40 for short is discharged from the die 30, the die 30 being designed as an annular blow die. The film web is initially formed as bubble which is later laid flat. Said film, which then comprises two individual films placed one on top of the other, is wound counter-clockwise onto one winding roller 50 or, after cutting, onto two winding rollers.

[0044] The film extrusion machine in FIG. 2 is a cast film extrusion machine, which, as an example, is also equipped with two extruders 20 for different compositions. A film web 40 is discharged from the die 30, which film web cools down on a cooling roller and is subsequently wound onto a winding roller 50.

[0045] FIG. 3 schematically shows the process of the method according to the invention. A memory and computing unit 100 is provided with machine parameters MP relating to properties and/or settings of at least one film extrusion machine, film parameters FP relating to the desired properties of the film, and raw material parameters RPn relating to the properties of the raw materials. The index n of the raw material parameters RP indicates that this is an entirety of raw materials from which one or more raw materials are selectable. The film production model is executed within the memory and computing unit, which detects the parameters mentioned above as entries and calculates from these which raw materials Rm are selected from the entirety of raw materials RPn. Alternatively or simultaneously, the required amount of the raw materials is also calculated. Here, the number of selected raw materials must be less than equal to the number the entirety of raw materials, i.e., m?n.

[0046] FIG. 4 shows a changed process of the method according to the invention. It is comparable to the schematic illustration according to FIG. 3, however, the expected properties of the film FPv are also output.

REFERENCE SIGN LIST

[0047] 10 Film extrusion machine [0048] 20 Extruder [0049] 30 Die [0050] 40 Film web [0051] 50 Winding roll [0052] 60 Dosing device [0053] 100 Memory and computing device [0054] R1, . . . Raw material [0055] Rx, . . . Raw material [0056] MP Machine parameter [0057] FP Film parameter [0058] RPn Raw material parameter for the total quantity of raw materials [0059] Rm Selected raw materials [0060] FPM Film production model