A method for forming a multilayer plastic sheet material is disclosed, where a first polymer mass is melted under pressure and is passed through an extruder head at a specified discharge rate in the form of a plastic strand in sheet form that is provided with one or more layers so that a multilayer plastic strand is formed. This is passed to two or more rolls of a finishing stand that processes the multilayer plastic strand into a sheet. After the plastic strand in sheet form leaves the extruder head, it is first passed between a top roll and a bottom roll of a roughing stand. The speed of the rolls of the finishing stand and the rolls of the roughing stand is synchronized with the discharge rate of the plastic strand in sheet form from the extruder head, so that the plastic strand is processed without stress.

A method of forming an oral product includes extruding a mixture, conveying the extruded mixture through one or more pairs of forming rollers, and cutting the extruded mixture into one or more oral products. The mixture can include polymer and at least one flavorant, sweetener, active ingredient, or combination thereof. The extruded mixture forms an extrudate having a predetermined cross-sectional shape. The one or more pairs of forming rollers abut to define a passage there between as each forming roller rotates. The passage has a cross-sectional shape corresponding to the predetermined cross-sectional shape. The method can be performed using a machine including an extruder, one or more pairs of forming rollers, and a cutting device.

A method and device for producing a monoaxially or biaxially stretched plastic film are disclosed in which in the intermediate space (Z) tapering in a wedge shape to the contact line between the melt film or plastic film and the roller jacket spaced apart therefrom or the roller surface spaced apart therefrom of the cooling roller, at least one device for preventing precipitation of condensate (K) in the intermediate space (Z) is used and is designed such that precipitation of condensate (a) on the underside of the melt film or plastic film facing the roller jacket (9) or on the roller jacket of the cooling roller is prevented, and/or a condensate (K) which has precipitated there evaporates or vaporises, and/or condensate disposed in the intermediate space is transported away, suctioned off, or blown out and/or runs out to the side.

Disclosed is a novel 3D-printer system for printing elastically deformable rubber parts such as rubber seals where the uncured rubber source material is partially cured before printing each rubber layer of the rubber part. Furthermore, disclosed is a novel 3D printing method for 3D-printing an elastically deformable rubber body using the 3D-printer system.

An improved method and an improved device for producing a monoaxially or biaxially stretched plastic film are distinguished, inter alia, by the following features: In the intermediate space (Z) tapering in a wedge shape to the contact line (111, 11′) between the melt film or plastic film (5, 5′) and the roller jacket (9) spaced apart therefrom or the roller surface (9′) spaced apart therefrom of the cooling roller (1, 1′), at least one device for preventing precipitation of condensate (K) in the intermediate space (Z) is used and is designed such that precipitation of condensate (a) on the underside (5a) of the melt film or plastic film (5, 5′) facing the roller jacket (9) or on the roller jacket (9) of the cooling roller (1, 1′) is prevented, and/or a condensate (K) which has precipitated there evaporates or vaporises, and/or condensate disposed in the intermediate space (Z) is transported away, suctioned off, or blown out and/or runs out to the side.

The invention relates to a method for the online monitoring of film quality during a production process for a plastic film, in particular a blown film or a continuously cast film, in which method the film material (1) is fed out of an outlet device (40) that is designed as a melt lug (4) by a transport device (10). The film material (1) cools on or in front of the transport device (10) and the film material (1) solidifies in front of or on the transport device (10).

A method for forming a multilayer plastic sheet material is disclosed, where a first polymer mass is melted under pressure and is passed through an extruder head at a specified discharge rate in the form of a plastic strand in sheet form that is provided with one or more layers so that a multilayer plastic strand is formed. This is passed to two or more rolls of a finishing stand that processes the multilayer plastic strand into a sheet. After the plastic strand in sheet form leaves the extruder head, it is first passed between a top roll and a bottom roll of a roughing stand. The speed of the rolls of the finishing stand and the rolls of the roughing stand is synchronized with the discharge rate of the plastic strand in sheet form from the extruder head, so that the plastic strand is processed without stress.

A blown film coextrusion line includes a support frame, a plurality of extruders each mounted to the support frame and extending upward at an angle, and a downward facing blown film coextrusion die connected to distal ends of each of the plurality of extruders and receiving individual polymer streams from them. The blown film coextrusion line is compact and sturdy and eliminates much of the floor space and towered mounting structure that was required for conventional blown film coextrusion lines. A corresponding method of making a multilayer coextruded blown film is also provided.

A method comprises the steps of continuously measuring, proximal a tube extrusion die, a diameter of tubing extruded by the die, to produce a plurality of die-measurement or layflat samples; and continuously measuring, downstream of the tube extrusion die and proximal an accumulation point of flattened tubing, a width of the flattened tubing, to produce a plurality of flat-width samples. A slope value is calculated over a selected interval of the layflat samples and the flat-width samples to determine the stability of the diameter of the tubing and the width of the flattened tubing. A y-intercept value is calculated over the selected interval of the layflat samples and the flat-width samples to determine a forecast trend of the diameter of the tubing and the width of the flattened tubing. When the slope values, y-intercept values, and variances are within selected parameters indicative of a stable operation of the tube extrusion die and the accumulation of flattened tubing, the tube extrusion die is calibrated to produce a selected width of flattened tubing.

Disclosed is a novel 3D-printer system for printing elastically deformable rubber parts such as rubber seals where the uncured rubber source material is partially cured before printing each rubber layer of the rubber part. Furthermore, disclosed is a novel 3D printing method for 3D-printing an elastically deformable rubber body using the 3D-printer system.