CA2205415A1 - Sheet die for an extruder - Google Patents
Sheet die for an extruderInfo
- Publication number
- CA2205415A1 CA2205415A1 CA002205415A CA2205415A CA2205415A1 CA 2205415 A1 CA2205415 A1 CA 2205415A1 CA 002205415 A CA002205415 A CA 002205415A CA 2205415 A CA2205415 A CA 2205415A CA 2205415 A1 CA2205415 A1 CA 2205415A1
- Authority
- CA
- Canada
- Prior art keywords
- sheet die
- barrier elements
- die
- extruder
- outlet gap
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/30—Extrusion nozzles or dies
- B29C48/305—Extrusion nozzles or dies having a wide opening, e.g. for forming sheets
- B29C48/31—Extrusion nozzles or dies having a wide opening, e.g. for forming sheets being adjustable, i.e. having adjustable exit sections
- B29C48/313—Extrusion nozzles or dies having a wide opening, e.g. for forming sheets being adjustable, i.e. having adjustable exit sections by positioning the die lips
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/05—Filamentary, e.g. strands
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/07—Flat, e.g. panels
- B29C48/08—Flat, e.g. panels flexible, e.g. films
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
Disclosed is a sheet die (4) for an extruder, in which the outlet slit can be closed off by a plurality of independently controllable barrier elements.
Description
CA 0220~41~ 1997-0~
;LE~ ~fflm~ '~L~
Sheet Die for an Extruder The present invention relates to a sheet die for an extruder. Sheet dies are used to form a flat strip from a plastic mass, preferably a plastic smelt, and to do this continuously or intermittently. In the known extrusion method of the type discussed herein, raw material is drawn from a plastifier, preferably an extruder, and ejected - continuously or intermittently through a nozzle that is ~tt~ched to the extruder outlet, said nozzle having a rect~ng~ r outlet slot. The thickness and the width ofthe strip that is formed are determined by the dimensions of the outlet slot in the sheet die.
Apparatuses for the continuous or intermittent forming foils or panels are already known. In these, the length of the outlet gap can be changed by covering the gap by means of adjustable rails. Also known are apparatuses in which the width of the outlet gap can be altered by adjusting the die land or the nozzle lips. However, such devices serve only to change from one product dimension to another.
It is ple~lled that the present invention relate to m~mlf~cturing shaped pieces by an embossing process. In this, using a sheet die that is secured to the outlet orifice of a screw-type injection machine, a smelt strip is introduced between the open halves of a shaping tool is such a way that during the ejection of the smelt the sheet die is moved horizontally over the depression in the mould. Once the ejection process has been completed, the smelt strip is separated at the edge of the nozzle by a cutter, so that the two halves of the mould can be closed by a mould closer and the smelt that has been CA 0220~41~ 1997-0~
introduced into it can be pressed to form a shaped part. Using such known devices, it is at present only possible to generate smelt strips that are of a constant width along their whole length. Since the shaped parts have very irregular contours, the distribution of the material during the pressing process is very l~n~ti~f~ctory, and this leads to differences in wall thicknesses, increased amounts of fiash, and imperfectly shaped parts.
In order to reduce these disadvantages, there are devices in the nozzle can be moved transversely as well as in an axial direction, in addition to displacement travel. This, however, entails the disadvantage that the mass will build up during transverse movement, and will thus contribute to an unequal distribution of the mass during the pressing process.
It is the task of the present invention to create a nozzle of the type described in the introduction hereto, which is not subject to these limitations, and which makes it possible to produce a strand that is of a cross section that can be varied along its length.
According to the present invention, this has been achieved by a nozzle of the type described in the introduction hereto having the characteristic features set out in Patent Claim 1.
CA 0220~41~ 1997-0~
Because of the measures that are proposed, the nozzle is closed off in the area of the outlet gap by a register of separate barrier elements. These barrier elements can be controlled and moved individually, when the two end positions of each one either fully open or fully close the outlet gap in its area, and each intermediate position changes the width of the outlet gap.
- - The number of barrier elements will depend on their width and the length of the outlet gap. As an example, in the case of a nozzle with an outlet gap that is 500 mm long, 25 barrier elements, each 20 mm wide, will be used. When a smelt strip is introduced into an embossing tool, given a constant linear speed ofthe injection moulding m~chine7 individual barrier elements will be opened or closed as a function of the shape of the part, so that the contour of the smelt strip is matched to the contour of the part that is to be m~mlf~ctured, for instance, the inside panels of automobile doors. Localized thicker or thinner areas can be obtained by opening or closing the barrier elements only part way. It is possible to produce openings [cut-out sections] by opening or closing the barrier elements that are located in the middle area. If only the barrier elements that are arranged in the edge area are used, two parts can be produced in one step.
The features of Claim 2 provide for a particularly precise adaptation of the length of the outlet gap of the sheet die to particular requirements.
The features of Claim 3 make it possible to change the width of the outlet gap and thus achieve localized thickening or thinning of the smelt strip.
CA 0220~41~ 1997-0~
The features of Claim 4 result in an embodiment that makes it possible to seal the individual barrier elements for the nozzle gap in a simple manner.
The features of Claim 5 make it possible to achieve an optimal sealing effect with an extremely space-efficient design, and do so in a particularly efficient way.
- The features in Claim 6 provide a particularly simple solution in which the forces that are generated during the extrusion process have to be absorbed by the actuators for the wall sections that are held so as to be pivotable.
The features in Claim 7 are advantageous in that the smelt egress speed can be kept constant even when the cross section of the outlet is changed.
The features in Claim 8 provide for very simple control of the barrier elements for the individual channels ofthe sheet die.
The present invention will be described in greater detail below on the basis of the drawings appended hereto. These drawing show the following:
Figure 1: the construction of an extrusion machine with an extruder that can be moved longit~1-lin~lly and a screw that can also be displaced longiturlin~lly, in which a sheet die with its associated controllers according to the present invention are used;
-CA 0220~41~ 1997-0~
Figure 2: a cross section through a sheet die according to the present invention, this having a closed channel;
Figure 3: a cross section through this sheet die, with the channel open and withanalogous travel positioning controls for the barrier elements;
Figure 4: a cross section on the line A-B in Figure 3;
Figure 5: a cross section through another embodiment of a sheet die according to the - present invention, with the channel closed;
Figure 6: a cross section through this embodiment, with the channel open;
Figure 7: a cross section through a third embodiment of a sheet die according to the present invention with the channel closed;
Figure 8: a cross section through the embodiment, with the channel open;
Figure 9: a diagram showing how a depression is filled with extruded material;
Figure 10: a diagram showing various possibilities for m~nllf~cturing variously shaped extrusions using the sheet die according to the present invention.
As can be seen best from Figure 4, a plurality of barrier elements 18 are arranged next to each other in the longitll(lin~l direction of the outlet gap, preferably across the whole of the sheet die. At its sides, the sheet die 4 is held by sprung wall sections 17 that are held in jaws 16.
In the embodiment shown in Figure 5 and Figure 6, the barrier elements 18' are in the form of plates that are guided in a groove 26 in the walls 23, 24 of the nozzle body. In this embodiment, the barrier element 18' can be moved towards the opposite wall 23, CA 0220~41~ 1997-0~
24 so that it is positioned tightly against it so as to form a seal, in order to block offthe particular channel 15.
In the embodiment shown in Figure 7 and Figure 8, the barrier elements 18" are formed from wall sections that can pivot about a shaft 27 and can be positioned by an actuator 22 so as to rest tightly against the opposite wall 23 so as to form a seal.
In the embodiment shown in Figure 2 and Figure 3, on the basis of which the present invention is to be explained in greater detail below, the barrier elements 18 are in the form of plates that are guided and slide between the face side 19 and the backing pieces 20 that are spring-loaded in the support arms 21.
In this embodiment, as in the embodiments discussed heretofore, each of the barrier elements is connected to a dedicated actuator 22 that can be in the form of a solenoid-type or hydraulic actuator, as is shown, that is controlled by way of a control valve 25 or 30. The control valves 25, 30 of all the barrier elements 18 are activated from a common controller 12. It is possible to close off the outlet gap of a sheet die 4, at least partially, by using an arrangement of this kind for a plurality of barrier elements 18 that can be controlled independently of each other.
The position of the individual barrier elements 18 that is required at any particular time is determined by a control input 31 ofthe controller 12 (see Figure 1). In addition to controlling the valves, the controller 12 is also used to determine the actual positions CA 0220~41~ 1997-0~
of the individual barrier elements 18, and thus determine the cross section of the outlet nozzle at any one time. To this end, there is a travel detector unit 29 for each barrier element, and this unit is connected to the controller 12.
S Figure 1 shows an extruder system with a sheet die 4 on an extruder. In this system, a plastifying screw is mounted so as to be rotatable and axially displaceable within an - injection cylinder 1, with a filler hopper 8 being provided for the granulate that is to be used.
The plastifying screw 2 extends into a plastifying cylinder 3, in which the granulate is melted and homogenized. A proportioning chamber 9 is left in the front area of the plastifying cylinder 3, or in an area that is close to the sheet die 4. As is indicated by the dashed lines, the injection cylinder 1, together with the plastifying cylinder 3 are held so as to be movable axially, so that the sheet die 4 can be moved over the lower part 7 of the mould that works in conjunction with an upper part 6 of the mould. The upper part 6 ofthe mould is secured to a press ram 5. A travel pickup 10 is incorporated to determine the travel that the sheet die 4 covers, and this is connected to a regulator 11 that, in its turn, is connected to the above described controller 12 that determines the cross section of the sheet die 4. The regulator activates a hydraulic valve 13 that controls delivery of hydraulic fluid to the injection cylinder 1, so that the regulator 11 can vary the injection speed of the extrudate as a function of the travel that is covered and the cross section, and can thus vary or m~int~in the thickness of the layer of extrudate.
CA 0220~41~ 1997-0~
As can be seen from Figure 9, the channels 15 that are associated with the barrier elements can be so modified by appropliate control ofthe actuators 22 for the individual barrier elements 18, 18', 18" that a extrusion 28 of any shape can beobtained, and this is then laid in the lower part 7 of a mould. By opening or closing the individual ch~nnel~ 15, it is possible to obtain an extrusion that is of any shape across its width, as is shown in Figure 9 at 28.
Figure 10 shows various possibilities for configuring the extrusions on the basis of the extrusion sections 28. The areas of these sections 28 that are defined by the thin lines 32 indicate the zones associated with the individual barrier elements 18, 18', 18"; the areas in which there are no lines there is no extruded material because the relevant barrier elements were closed during production of the particular section. A digitally controlled actuator for the barrier elements will be sufficient to achieve such variously configured extrusions, simply by toggling this between an OPEN and a CLOSED
position. If theactuators22forthebarrierelements 18, 18', and 18" canbecontrolled proportionally, it is also possible to vary the thickness or height of the extrusion in the particular area of the extruded material 28.
;LE~ ~fflm~ '~L~
Sheet Die for an Extruder The present invention relates to a sheet die for an extruder. Sheet dies are used to form a flat strip from a plastic mass, preferably a plastic smelt, and to do this continuously or intermittently. In the known extrusion method of the type discussed herein, raw material is drawn from a plastifier, preferably an extruder, and ejected - continuously or intermittently through a nozzle that is ~tt~ched to the extruder outlet, said nozzle having a rect~ng~ r outlet slot. The thickness and the width ofthe strip that is formed are determined by the dimensions of the outlet slot in the sheet die.
Apparatuses for the continuous or intermittent forming foils or panels are already known. In these, the length of the outlet gap can be changed by covering the gap by means of adjustable rails. Also known are apparatuses in which the width of the outlet gap can be altered by adjusting the die land or the nozzle lips. However, such devices serve only to change from one product dimension to another.
It is ple~lled that the present invention relate to m~mlf~cturing shaped pieces by an embossing process. In this, using a sheet die that is secured to the outlet orifice of a screw-type injection machine, a smelt strip is introduced between the open halves of a shaping tool is such a way that during the ejection of the smelt the sheet die is moved horizontally over the depression in the mould. Once the ejection process has been completed, the smelt strip is separated at the edge of the nozzle by a cutter, so that the two halves of the mould can be closed by a mould closer and the smelt that has been CA 0220~41~ 1997-0~
introduced into it can be pressed to form a shaped part. Using such known devices, it is at present only possible to generate smelt strips that are of a constant width along their whole length. Since the shaped parts have very irregular contours, the distribution of the material during the pressing process is very l~n~ti~f~ctory, and this leads to differences in wall thicknesses, increased amounts of fiash, and imperfectly shaped parts.
In order to reduce these disadvantages, there are devices in the nozzle can be moved transversely as well as in an axial direction, in addition to displacement travel. This, however, entails the disadvantage that the mass will build up during transverse movement, and will thus contribute to an unequal distribution of the mass during the pressing process.
It is the task of the present invention to create a nozzle of the type described in the introduction hereto, which is not subject to these limitations, and which makes it possible to produce a strand that is of a cross section that can be varied along its length.
According to the present invention, this has been achieved by a nozzle of the type described in the introduction hereto having the characteristic features set out in Patent Claim 1.
CA 0220~41~ 1997-0~
Because of the measures that are proposed, the nozzle is closed off in the area of the outlet gap by a register of separate barrier elements. These barrier elements can be controlled and moved individually, when the two end positions of each one either fully open or fully close the outlet gap in its area, and each intermediate position changes the width of the outlet gap.
- - The number of barrier elements will depend on their width and the length of the outlet gap. As an example, in the case of a nozzle with an outlet gap that is 500 mm long, 25 barrier elements, each 20 mm wide, will be used. When a smelt strip is introduced into an embossing tool, given a constant linear speed ofthe injection moulding m~chine7 individual barrier elements will be opened or closed as a function of the shape of the part, so that the contour of the smelt strip is matched to the contour of the part that is to be m~mlf~ctured, for instance, the inside panels of automobile doors. Localized thicker or thinner areas can be obtained by opening or closing the barrier elements only part way. It is possible to produce openings [cut-out sections] by opening or closing the barrier elements that are located in the middle area. If only the barrier elements that are arranged in the edge area are used, two parts can be produced in one step.
The features of Claim 2 provide for a particularly precise adaptation of the length of the outlet gap of the sheet die to particular requirements.
The features of Claim 3 make it possible to change the width of the outlet gap and thus achieve localized thickening or thinning of the smelt strip.
CA 0220~41~ 1997-0~
The features of Claim 4 result in an embodiment that makes it possible to seal the individual barrier elements for the nozzle gap in a simple manner.
The features of Claim 5 make it possible to achieve an optimal sealing effect with an extremely space-efficient design, and do so in a particularly efficient way.
- The features in Claim 6 provide a particularly simple solution in which the forces that are generated during the extrusion process have to be absorbed by the actuators for the wall sections that are held so as to be pivotable.
The features in Claim 7 are advantageous in that the smelt egress speed can be kept constant even when the cross section of the outlet is changed.
The features in Claim 8 provide for very simple control of the barrier elements for the individual channels ofthe sheet die.
The present invention will be described in greater detail below on the basis of the drawings appended hereto. These drawing show the following:
Figure 1: the construction of an extrusion machine with an extruder that can be moved longit~1-lin~lly and a screw that can also be displaced longiturlin~lly, in which a sheet die with its associated controllers according to the present invention are used;
-CA 0220~41~ 1997-0~
Figure 2: a cross section through a sheet die according to the present invention, this having a closed channel;
Figure 3: a cross section through this sheet die, with the channel open and withanalogous travel positioning controls for the barrier elements;
Figure 4: a cross section on the line A-B in Figure 3;
Figure 5: a cross section through another embodiment of a sheet die according to the - present invention, with the channel closed;
Figure 6: a cross section through this embodiment, with the channel open;
Figure 7: a cross section through a third embodiment of a sheet die according to the present invention with the channel closed;
Figure 8: a cross section through the embodiment, with the channel open;
Figure 9: a diagram showing how a depression is filled with extruded material;
Figure 10: a diagram showing various possibilities for m~nllf~cturing variously shaped extrusions using the sheet die according to the present invention.
As can be seen best from Figure 4, a plurality of barrier elements 18 are arranged next to each other in the longitll(lin~l direction of the outlet gap, preferably across the whole of the sheet die. At its sides, the sheet die 4 is held by sprung wall sections 17 that are held in jaws 16.
In the embodiment shown in Figure 5 and Figure 6, the barrier elements 18' are in the form of plates that are guided in a groove 26 in the walls 23, 24 of the nozzle body. In this embodiment, the barrier element 18' can be moved towards the opposite wall 23, CA 0220~41~ 1997-0~
24 so that it is positioned tightly against it so as to form a seal, in order to block offthe particular channel 15.
In the embodiment shown in Figure 7 and Figure 8, the barrier elements 18" are formed from wall sections that can pivot about a shaft 27 and can be positioned by an actuator 22 so as to rest tightly against the opposite wall 23 so as to form a seal.
In the embodiment shown in Figure 2 and Figure 3, on the basis of which the present invention is to be explained in greater detail below, the barrier elements 18 are in the form of plates that are guided and slide between the face side 19 and the backing pieces 20 that are spring-loaded in the support arms 21.
In this embodiment, as in the embodiments discussed heretofore, each of the barrier elements is connected to a dedicated actuator 22 that can be in the form of a solenoid-type or hydraulic actuator, as is shown, that is controlled by way of a control valve 25 or 30. The control valves 25, 30 of all the barrier elements 18 are activated from a common controller 12. It is possible to close off the outlet gap of a sheet die 4, at least partially, by using an arrangement of this kind for a plurality of barrier elements 18 that can be controlled independently of each other.
The position of the individual barrier elements 18 that is required at any particular time is determined by a control input 31 ofthe controller 12 (see Figure 1). In addition to controlling the valves, the controller 12 is also used to determine the actual positions CA 0220~41~ 1997-0~
of the individual barrier elements 18, and thus determine the cross section of the outlet nozzle at any one time. To this end, there is a travel detector unit 29 for each barrier element, and this unit is connected to the controller 12.
S Figure 1 shows an extruder system with a sheet die 4 on an extruder. In this system, a plastifying screw is mounted so as to be rotatable and axially displaceable within an - injection cylinder 1, with a filler hopper 8 being provided for the granulate that is to be used.
The plastifying screw 2 extends into a plastifying cylinder 3, in which the granulate is melted and homogenized. A proportioning chamber 9 is left in the front area of the plastifying cylinder 3, or in an area that is close to the sheet die 4. As is indicated by the dashed lines, the injection cylinder 1, together with the plastifying cylinder 3 are held so as to be movable axially, so that the sheet die 4 can be moved over the lower part 7 of the mould that works in conjunction with an upper part 6 of the mould. The upper part 6 ofthe mould is secured to a press ram 5. A travel pickup 10 is incorporated to determine the travel that the sheet die 4 covers, and this is connected to a regulator 11 that, in its turn, is connected to the above described controller 12 that determines the cross section of the sheet die 4. The regulator activates a hydraulic valve 13 that controls delivery of hydraulic fluid to the injection cylinder 1, so that the regulator 11 can vary the injection speed of the extrudate as a function of the travel that is covered and the cross section, and can thus vary or m~int~in the thickness of the layer of extrudate.
CA 0220~41~ 1997-0~
As can be seen from Figure 9, the channels 15 that are associated with the barrier elements can be so modified by appropliate control ofthe actuators 22 for the individual barrier elements 18, 18', 18" that a extrusion 28 of any shape can beobtained, and this is then laid in the lower part 7 of a mould. By opening or closing the individual ch~nnel~ 15, it is possible to obtain an extrusion that is of any shape across its width, as is shown in Figure 9 at 28.
Figure 10 shows various possibilities for configuring the extrusions on the basis of the extrusion sections 28. The areas of these sections 28 that are defined by the thin lines 32 indicate the zones associated with the individual barrier elements 18, 18', 18"; the areas in which there are no lines there is no extruded material because the relevant barrier elements were closed during production of the particular section. A digitally controlled actuator for the barrier elements will be sufficient to achieve such variously configured extrusions, simply by toggling this between an OPEN and a CLOSED
position. If theactuators22forthebarrierelements 18, 18', and 18" canbecontrolled proportionally, it is also possible to vary the thickness or height of the extrusion in the particular area of the extruded material 28.
Claims (8)
1. An extrusion system with a plastifying screw (2), a sheet die (4), a plurality of barrier elements (18, 18', 18") that can be controlled independently of each other, and a regulator (13) for controlling the barrier elements (18, 18', 18"), characterized in that in order to change the width of the extrudate, the outlet gap (15) of the sheet die (4) can be closed off completely by barrier elements (18, 18', 18") that can be controlled independently of each other, the regulator (13) regulating the screw advance rate proportionally to the cross section of the outlet gap in order to control the throughput of the mass in the outlet gap (15) of the sheet die (4).
2. An extruder system as defined in Claim 1, characterized in that the barrier elements (18, 18', 18") being moved by an actuator, e.g., an hydraulic cylinder assembly (22) that is digitally controlled by way of a control valve (30) so as to move only between an OPEN and a CLOSED position.
3. An extruder system as defined in Claim 1, characterized in that the barrier elements (18, 18', 18") can be moved into any intermediate position between a CLOSED and an OPEN position by an actuator, e.g., an hydraulic cylinder assembly (22) that is similarly controlled by way of a control valve (30)
4. An extruder system as defined in one of the Claims 1, 2, or 3, characterized in that the barrier elements (18) are formed by metal plates that are guided between the face side (19) of the sheet die (4) and backing pieces (20) that are optionally spring-loaded.
5. An extruder system as defined in Claim 1, 2, or 3, characterized in that the barrier elements (18') in the outlet area (15) of the sheet die (4), are guided so as to be able to slide in a part of the wall (24) of the sheet die (4), and can be pressed tightly against the second wall (23) of the sheet die (4) so as to be sealed.
6. An extruder system as defined in Claim 1, 2, or 3, characterized in that the barrier elements (18") in the outlet area of the sheet die (4) are held in a part of a wall (24) of the sheet die (4) so as to pivot, and can be positioned by an actuator (22) so as to be tight against the second wall of the of the sheet die (4) and form aseal.
7. An extrusion system as defined in Claims 1 to 5, characterized in that the regulator (13) for regulating the advance speed of the screw (Figure 1) is connected with a controller (12) for determining the cross section of the sheet die (4) at any one time.
8. An extrusion system as defined in Claim 1 to Claim 7, characterized in that atravel measurement system (10) is provided to determine the linear travel of thesheet die (4), and every position of the sheet die (4) can be associated with a specific outlet gap cross section.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ATA2111/94 | 1994-11-15 | ||
| AT0211194A AT402039B (en) | 1994-11-15 | 1994-11-15 | SCREW PLASTIFICATION DEVICE |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2205415A1 true CA2205415A1 (en) | 1996-05-23 |
Family
ID=3528016
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002205415A Abandoned CA2205415A1 (en) | 1994-11-15 | 1995-11-14 | Sheet die for an extruder |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0792207B1 (en) |
| AT (1) | AT402039B (en) |
| CA (1) | CA2205415A1 (en) |
| DE (1) | DE59509785D1 (en) |
| WO (1) | WO1996014974A1 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6151338A (en) | 1997-02-19 | 2000-11-21 | Sdl, Inc. | High power laser optical amplifier system |
| DE19757827C2 (en) * | 1997-12-05 | 2001-02-22 | Kuhne Gmbh | Multi-layer adapter for an extrusion device |
| AT3540U1 (en) * | 1998-10-21 | 2000-04-25 | Engel Gmbh Maschbau | CONTROLLING THE DISPENSING OF PLASTIC |
| DE102005031698A1 (en) * | 2005-07-05 | 2007-01-18 | Breyer Gmbh Maschinenfabrik | Extrusion die for profiling plastics has die gap whose breadth and subsequent extrudate breadth can be altered by inserting slides |
| US20230031400A1 (en) * | 2021-07-27 | 2023-02-02 | Saudi Arabian Oil Company | Fast layered extrusion for additive manufacturing |
| AT526624A1 (en) * | 2022-10-18 | 2024-05-15 | Sbi Mechatronik Gmbh | Device for adjusting the gap of a slot die |
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| US3579723A (en) * | 1969-07-25 | 1971-05-25 | Koehring Co | Extruder-molder |
| US3830610A (en) * | 1970-12-23 | 1974-08-20 | Bridgestone Tire Co Ltd | Apparatus for forming rubber products such as a tread rubber by extrusion |
| FR2217148A1 (en) * | 1972-02-11 | 1974-09-06 | Orszagos Gumiipari Vallalat | Extrusion die orifice - adjustable by flexible steel sheet forming a wall of orifice |
| US4439125A (en) * | 1982-03-31 | 1984-03-27 | The Firestone Tire & Rubber Company | Adjustable die mechanism |
| JPS59150720A (en) * | 1983-02-17 | 1984-08-29 | Sumitomo Chem Co Ltd | Preparation of highly electric-conductive thermoplastic resin molded piece |
| JPS61227010A (en) * | 1985-03-30 | 1986-10-09 | Puramatsuku Kk | Molding of resin material and device thereof |
| JPH0193315A (en) * | 1987-10-03 | 1989-04-12 | Kobe Steel Ltd | Material charging method for resin compression molding press |
| ATE90908T1 (en) * | 1989-09-16 | 1993-07-15 | Roehm Gmbh | COEXTRUSION ADAPTER. |
| US5145689A (en) * | 1990-10-17 | 1992-09-08 | Exxon Chemical Patents Inc. | Meltblowing die |
| US5147195A (en) * | 1991-06-13 | 1992-09-15 | The Cloeren Company | Extrusion apparatus with adjustable flow-restricting member |
| FR2703294B1 (en) * | 1993-04-02 | 1995-06-09 | Hureau Jacques | Method and device for the production by extrusion of elongate elements with a lacunar structure, and elements thus obtained. |
-
1994
- 1994-11-15 AT AT0211194A patent/AT402039B/en not_active IP Right Cessation
-
1995
- 1995-11-14 EP EP95935749A patent/EP0792207B1/en not_active Expired - Lifetime
- 1995-11-14 WO PCT/AT1995/000218 patent/WO1996014974A1/en active IP Right Grant
- 1995-11-14 DE DE59509785T patent/DE59509785D1/en not_active Expired - Fee Related
- 1995-11-14 CA CA002205415A patent/CA2205415A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| DE59509785D1 (en) | 2001-12-06 |
| EP0792207A1 (en) | 1997-09-03 |
| EP0792207B1 (en) | 2001-10-31 |
| ATA211194A (en) | 1996-06-15 |
| AT402039B (en) | 1997-01-27 |
| WO1996014974A1 (en) | 1996-05-23 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued |