摘要:
The invention relates to an apparatus (20) for automatically analyzing extruded films, in particular stretched films (7), wherein a neck-in portion is formed at each of both edges of the film at a specific distance from an extrusion lip of a film extruder along the longitudinal transport direction of the film, and a respective method. The apparatus comprises two edge detectors (31a, 31b) being arranged along a first line substantially transversal to the longitudinal direction and being spaced from each other by a specific distance, wherein each one edge detector (31a, 31b) is configured to detect, preferably to continuously detect the lateral position of one respective edge of the neck-in portion of the film, a calculation means for determining the spatial relation between at least one lateral position at the extrusion lip and a respective lateral position at the neck-in portion on the basis of the two lateral positions of the edges of the neck-in portion of the film.
摘要:
The invention discloses a slot die (10) for an extrusion device for the extrusion of preforms (1) in web or strip form from thermoplastic material which comprises a die gap (11) extending transversely to a direction of extrusion and intended for delivering a preform (1). The slot die (10) is characterized in that it comprises at least one adjusting element (12), which is arranged peripherally in the die gap (11), limits a widthwise extent of the die gap (11) and is mounted continuously displaceably and/or pivotably with respect to the die gap (11). The widthwise extent of the die gap (11) is dynamically and continuously variable by displacing and/or pivoting the adjusting element (12), so that a widthwise extent of a preform (1) extruded from the slot die (10) is continuously and infinitely variable over the length of extrusion thereof.
摘要:
In a die lip driving structure according to an embodiment, a rotational force of a lever (34) is converted into a force in an axial direction of an operating rod, and the force in the axial direction becomes a pressing load or a tensile load exerted on a flexible lip portion (22). The lever (34) directly applies a force to the operating rod (36) at a point of action P of the lever (34).
摘要:
The invention provides a coextrusion feedblock (500) having a flow adjuster (50), a viscosity compensation device (100), an actuator (110), a central extrusion conduit (300), and a coextrusion conduit (200). The invention also provides a coextrusion profiling insert assembly constructed to be mounted in a coextrusion feedblock (500). The insert assembly has a flow adjuster (50), a viscosity compensation device (100), and an actuator (110). The insert assembly when mounted in the feedblock (500) has a coextrusion conduit (200) extending between the flow adjuster (50) and the viscosity compensation device (100). The actuator (110) is adjustable to apply force to bend the viscosity compensation device (100) and thereby adjust a gap height of the coextrusion conduit (200). Also provided is a method of operating a feedblock (500) having a viscosity compensation device (100) comprising a flex region, a central extrusion conduit (300), and a coextrusion conduit (200). Force is applied to bend the flex region of the viscosity compensation device (100) and thereby adjust a gap height of the coextrusion conduit (200).
摘要:
Extrusion die for delivering a variable extruded profile, at least comprising: • a. an extrusion die body (1), • b. a die orifice (2) in the extrusion die body (1), containing a main orifice (2a) for shaping an extruded profile, and a bulge (2b), connected to the main orifice (2a), for shaping a lip connected to the extruded profile, • c. a slide (3) in front of the die orifice (2), wherein the slide (3) comprises a first part-slide (3a) and a second part-slide (3b), which are arranged one behind the other and are connected to one another by way of a sliding guide (5), and wherein the first part-slide (3a) and the second part-slide (3b) are coupled to one another in terms of movement.
摘要:
An extrusion die is provided with an external deckle assembly, an internal deckle assembly, or both. One embodiment provides an extrusion die having a wedge-actuated external deckle assembly. A seal member of the external deckle assembly moves to a sealed position in response to movement of the wedge in a first direction. Another embodiment provides an extrusion die with an internal deckle assembly having a deckle rod support system. The internal deckle assembly includes a deckle rod and a transversely elongated support engaged with the deckle rod to restrain the deckle rod against bending.
摘要:
Provided are a film production apparatus and a method for producing film capable of exerting a good effect of suppressing necking-in and suppressing film wobbling, and further exerting a good effect of suppressing build-up having a trade-off relationship with the suppression of necking-in. A film production apparatus 10 is configured to take up molten resin fl extruded downward from an exit 1a bored at a lower end face 1b of a die 1 by a rotating chill roll 3 located below the exit 1a and to cool the molten resin fl for solidification by the chill roll 3 to produce film FL, and the film production apparatus further includes: a fluid chamber 5 that provides fluid fd to a space K between the exit 1a and the chill roll 3, the fluid chamber 5 having a counter face facing the space K and the chill roll 3, and the fluid fd provided from the fluid chamber 5 flows through a fluid channel along the counter face toward the die 1 while applying a fluid pressure p in a direction pushing back the molten resin fl existing in the space K against displacement of the molten resin taken up in a rotational direction of the chill roll 3.