CA1199764A - Adjustable ring nozzle for extruding synthetic-resin tubing - Google Patents
Adjustable ring nozzle for extruding synthetic-resin tubingInfo
- Publication number
- CA1199764A CA1199764A CA000412166A CA412166A CA1199764A CA 1199764 A CA1199764 A CA 1199764A CA 000412166 A CA000412166 A CA 000412166A CA 412166 A CA412166 A CA 412166A CA 1199764 A CA1199764 A CA 1199764A
- Authority
- CA
- Canada
- Prior art keywords
- axially
- rings
- nozzle
- ring nozzle
- face
- 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.)
- Expired
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
- B29C48/32—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles
- B29C48/325—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles being adjustable, i.e. having adjustable exit sections
- B29C48/327—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles being adjustable, i.e. having adjustable exit sections with centering means
-
- 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
- B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
-
- 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
- B29C48/32—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles
-
- 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
- B29C48/32—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles
- B29C48/325—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles being adjustable, i.e. having adjustable exit sections
Abstract
Abstract of the Disclosure A ring nozzle for use with an extruder to continuously form a synthetic-resin tube has a substantially stationary back nozzle part having an axially forwardly directed front face and formed with an axially centered passage opening at the face. This part is typically bolted over the outlet of the extruder. An axially centered core rod is substantially fixed in the passage and extends axially forward past the front face. This rod is also fixed in the extruder so that same can emit a hot and thick tubular strand of a plastified synthetic resin. An annular and movable front nozzle part fits with spacing around the core forward of the front face and forms therewith an axially centered and forwardly open annular gap. The thick tubular strand formed by the extruder becomes a thin-walled strand that emerges from the annular gap. The axially confronting faces of the front and back mold parts have complementary part-spherical surfaces riding on each other and permitting the front nozzle part to tip limitedly on the back nozzle part, but having adjustment elements braced axially at three or more generally angularly equispaced locations between the back and front faces for tipping the front part on the back part and thereby adjusting the gap. Biasing means urges the front part axially back against the adjustment elements. This biasing means includes springs bearing axially back against the front part.
Description
The present invention relates to an adjustable ring nozzle for use in conjunction with an extruder to form continuous synthetic-resin tubing. More particularly this lnvention concerns the type of nozzle that produce a tube wall fine enough that the tubing can be used as bags.
A ring nozzle for use with an extruder to continuously form a syn-thetic-resin tube normally has a substantially stationa-ry back nozzle part having an axially forwardly directed front face and fornled with an axially cen~cered passage opening at the face. This part is typically bolted over the outlet of the extruder. An axially centered core rod is substantially fixed in the passage and extends axially forward past the front face. This rod is also fixed in the extruder so that same can emit a hot and thick tubular strand of a plastiEied synthetic resin. An annular and movable front nozzle part fits with spacing around the core forward of the front face and forms therewith an axially centered and forwardly open annular gap. The thick tubular strand formed by the extruder becomes a thin-walled strand that emerges from the annular gap.
In order to extrude a strand of regular and small wall thickness, it is essential to provide some means for displacing the front nozzle part accurate-ly on the rear nozzle part. Hence, as described in German patent 961,211 o-f H. Koch, it is standard to provide a plurality of angularly equispaced and ~0 radially extending adjustment screws threaded into the front nozzle part and bearing on the core rod. To change the spacing in one location the respective screw is turned in or out, after oppositely adjusting the diametrally opposite screw. This procedure is arduous so that it is rarely executed with the pre-cision required in many plastics-tubing products.
It is also known, as for example from German patent 961,130, to form the axially confronting faces of the front and back mold parts with comple~entary 7~
part-spherical surfaces riding on each other and permit-ting the front nozzle part to -tip limitedly on the back nozzle part.
In -this system the adjustment screws extend -through respective axially throughgoing bores in the Eron-t part and are threaded in the back part. The heads of these screws bear axially back-ward on the front part. Thus to adjust the gap the screw on the too--thin portion is screwed out a little and the diametrically opposite screw is screwed in. In this system it is also very difficul-t to adjust the gap accurately. It is an object of the present inven-tion to provide a ring nozzle that is easy to adjust.
According to the present invention there is provided a ring nozzle for use with an extruder -to continuously form a synthetic-resin tube~ the ring nozzle comprising: a substantially stationary back nozzle part having an axially forwardly directed front face and formed with an axially centered passage opening at the face; an axially centered core rod substantially fixed in the passage and extending axially forward past the front face;
an annular and movable front nozzle p-~rt fitted spacedly around the core rod forward of the front face and forming therewith an axially centered and forwardly open annu]ar gap, the front part having a back face axially confronting the fron-t face of the back part, the front and back faces being formed around the passage and centered on the axis with complementary part-spherical sur-faces riding on each other and permitting the front nozzle part to tip limitedly on the back nozzle part and thereby vary the radial dimensions of the gap; adjustment means including axially centered rings axially engaged between the front and back faces and having flatly axially abu-t-ting planar ring faces lying in ~a~ 7~
a plane that is transvexse but not perpendicular to -the axis of the nozzle, whereby angularly displacing the rings rela-tive to each other tips the front part on the back part, the rings being braced axially between the back and front faces for tipping the Eront part on the back part and therehy adjusting the gap; and biasing means including springs bearing axially back against -the front part for urging the front part axially back against the rings and there-through back against the back nozzle part.
One of the parts may be formed with a radially outward-ly projecting flange forming part of the respective face andbearing axially against the rlngs.
Preferably the other oE the parts may be provided on the respective face with an axially projecting annular bump bear-ing on the set of rings.
According to a preferred feature at least one of the rings is provided with a radially projecting arm, whereby angular displacement of the arm rota-tes the respective ring.
Conveniently at least one of the rings may be formed with an annular array of teeth, the adjustment means including a drivable pinion meshing with the teeth.
One of the rings may be unitary with one of the parts.
Further one of the rings may be fixed on one of the parts.
The adjustment means may include rollers axially engaged with at least one of the rings and the rollers may be tapered.
According to a further Eeature of the invention one of the parts rnay be provided with respective axially displaceable second adjustment elements bearing axially against the rings at the locations. An automatic electronic controller may be 769~
connected to the adjustment elements for displacing it.
PreEerably the back part may include bolts projecting axially forward through the front part, and the spr:ing means may include spring washers engaged around the bolts and bearing axial-ly backward on the front part.
The following is a description by way of example of certain embodiments in accordance with the present invention reference being made to the accompanying drawings in which:-Figure 1 is an axial section through a nozzle according10 to this invention;
Figure 2 is an axial section through a pair of adjustment rings according to this invention;~
Figures 3 and 4 are axial sections through further nozzles in accordance with this invention; and Figures 5 and 6 are axial sections through details of further arrangements according to the invention.
Specific Description As seen in Figures 1 and 2 a nozzle 2, suitable for use with an extruder to continuously form a synthetic-resin tube, has a rear nozzle part 1 176~
that ls normally fixed on or even may be part of the ex~uder and that is formed with a central passage 21 centered on an axis h. A c~re rod 3 also centered on this axis A lies in this passage and is also usually part of the extruder. A front nozzle part 4 rides via a part-spherical surface 11' on a complementary such surface 11" formed on the part 1 around the passage 21, Thus the front part 4, can be tipped from a position aligned with the axis A so that the gap formed between the front part 4 and the end of the core rod 3 can be adjusted, while no leakage occurs between the surfaces 11' and il", The front part 4 is formed with six angularly equispaced and axially throughgoing bores 7 equispaced from the axis A. Respective screws 8 extend through these bores 7 and are screwed into the part 1. These screws have heads 9 bearing via respective stacks of belleville-washer springs 10 back against the part 4. Thus in any tipped position of the part 4 relative to the part 1 the springs 10 will hold the two tightly together at the surface 11' and 11".
A flange 12 extending radially outwardly from the front of the front part 4 axially confronts an annular bump 14 formed on the confronting front face of the rear part 1. A stack of four rings 13 is provi~ed between this annular bump 14 and flange 12. Each such ring has~ as seen in Figure 2, a planar face 13' that is slightly tipped to the opposite face 13" of the ring 13.
In addition at least the two center rings 13 are provided with radially pro~ect-ing arms 15 by means of which they can be pivoted about the axis A.
When the two rings are offset in 180 opposite positions as seen In Figure 2, the faces 13" are parallel and perpendicular to the axis A. Turning either of the rings 13 from this position tips the outer part 4 on the inner part 1. The slight canting of ~he outer part 4 allows the gap 5 to be adjusted accurately, with the springs 10 pushing it back with enough force, g76~
regardless of the angular position, to prevent leakage between the surfaces 11l and 11".
The arrangement of Figure 3 is identical to that of Figures 1 and 2 except that here one of the rings 13 is secured by screws 22 to the flange 12.
In addition the rear part 1 is not provided with an annular bump, but with at least three angularly equispaced short pistons 16 sliding in long axially extend-ing bores 17 formed in the rear part 1. The pistons 16 always form chambers 18 in the bores 17 which are connected via respective conduits or passages 19 to an electronic/hydraulic controller 20. By adjusting pressure differently in the chambers 18 it is possible to achieve a coarse adjustment of the gap 5 relative-ly easily.
In Figure 4 the pistons 16 bear directly on the part 4 at pockets 23 formed in the rear face of the front part 4. Thus in this arrangement, which ,," ;, ~lol~
c~ '` otherwise is similar to that of Figure 1, the pistons 16 t~ constitute the adjustment e].ements.
Figure 5 shows an arrangements similar to Figure 1 wherein the two rings 13 are formed with teeth 24 meshing via gears 25 with pinions 26 carried on respective motors 27. These motors 27 in turn are operated by an electronic controller, in response to strain-gauge sensors in the nozzle 2. In addition in thi.s arrangement three mainly axially displaceable bolts or screws 28 bear axially forward against the stack of rings 13, and the frontmost ring 13a is unitarily formed with the flange 12. Alternatively the ring 13a could be fixed to the flange 12.
Finally, Figure 6 shows an arrangement like Figure 1, but wherein one of the rings is replaced by an annular array of tapered rollers 13b having a ca.ge that is not illustrated. In this system the rollers 13b make rotating the , .
7~
adjacent rings 13 much easier. Such rollers 13b could also be provided between each ring 13 and the adjacent ring or surface.
In the arrangement according to the ins~ant invention it is possible to achieve an accurate adjustment of the nozzle in a very simple manner. The rings 13 can tip the front part 4 through very small and accurately determined increments. Since it is not necessary to loosen on one side before tightening on another, the adjustment can be carried out rapidly and efficiently.
A ring nozzle for use with an extruder to continuously form a syn-thetic-resin tube normally has a substantially stationa-ry back nozzle part having an axially forwardly directed front face and fornled with an axially cen~cered passage opening at the face. This part is typically bolted over the outlet of the extruder. An axially centered core rod is substantially fixed in the passage and extends axially forward past the front face. This rod is also fixed in the extruder so that same can emit a hot and thick tubular strand of a plastiEied synthetic resin. An annular and movable front nozzle part fits with spacing around the core forward of the front face and forms therewith an axially centered and forwardly open annular gap. The thick tubular strand formed by the extruder becomes a thin-walled strand that emerges from the annular gap.
In order to extrude a strand of regular and small wall thickness, it is essential to provide some means for displacing the front nozzle part accurate-ly on the rear nozzle part. Hence, as described in German patent 961,211 o-f H. Koch, it is standard to provide a plurality of angularly equispaced and ~0 radially extending adjustment screws threaded into the front nozzle part and bearing on the core rod. To change the spacing in one location the respective screw is turned in or out, after oppositely adjusting the diametrally opposite screw. This procedure is arduous so that it is rarely executed with the pre-cision required in many plastics-tubing products.
It is also known, as for example from German patent 961,130, to form the axially confronting faces of the front and back mold parts with comple~entary 7~
part-spherical surfaces riding on each other and permit-ting the front nozzle part to -tip limitedly on the back nozzle part.
In -this system the adjustment screws extend -through respective axially throughgoing bores in the Eron-t part and are threaded in the back part. The heads of these screws bear axially back-ward on the front part. Thus to adjust the gap the screw on the too--thin portion is screwed out a little and the diametrically opposite screw is screwed in. In this system it is also very difficul-t to adjust the gap accurately. It is an object of the present inven-tion to provide a ring nozzle that is easy to adjust.
According to the present invention there is provided a ring nozzle for use with an extruder -to continuously form a synthetic-resin tube~ the ring nozzle comprising: a substantially stationary back nozzle part having an axially forwardly directed front face and formed with an axially centered passage opening at the face; an axially centered core rod substantially fixed in the passage and extending axially forward past the front face;
an annular and movable front nozzle p-~rt fitted spacedly around the core rod forward of the front face and forming therewith an axially centered and forwardly open annu]ar gap, the front part having a back face axially confronting the fron-t face of the back part, the front and back faces being formed around the passage and centered on the axis with complementary part-spherical sur-faces riding on each other and permitting the front nozzle part to tip limitedly on the back nozzle part and thereby vary the radial dimensions of the gap; adjustment means including axially centered rings axially engaged between the front and back faces and having flatly axially abu-t-ting planar ring faces lying in ~a~ 7~
a plane that is transvexse but not perpendicular to -the axis of the nozzle, whereby angularly displacing the rings rela-tive to each other tips the front part on the back part, the rings being braced axially between the back and front faces for tipping the Eront part on the back part and therehy adjusting the gap; and biasing means including springs bearing axially back against -the front part for urging the front part axially back against the rings and there-through back against the back nozzle part.
One of the parts may be formed with a radially outward-ly projecting flange forming part of the respective face andbearing axially against the rlngs.
Preferably the other oE the parts may be provided on the respective face with an axially projecting annular bump bear-ing on the set of rings.
According to a preferred feature at least one of the rings is provided with a radially projecting arm, whereby angular displacement of the arm rota-tes the respective ring.
Conveniently at least one of the rings may be formed with an annular array of teeth, the adjustment means including a drivable pinion meshing with the teeth.
One of the rings may be unitary with one of the parts.
Further one of the rings may be fixed on one of the parts.
The adjustment means may include rollers axially engaged with at least one of the rings and the rollers may be tapered.
According to a further Eeature of the invention one of the parts rnay be provided with respective axially displaceable second adjustment elements bearing axially against the rings at the locations. An automatic electronic controller may be 769~
connected to the adjustment elements for displacing it.
PreEerably the back part may include bolts projecting axially forward through the front part, and the spr:ing means may include spring washers engaged around the bolts and bearing axial-ly backward on the front part.
The following is a description by way of example of certain embodiments in accordance with the present invention reference being made to the accompanying drawings in which:-Figure 1 is an axial section through a nozzle according10 to this invention;
Figure 2 is an axial section through a pair of adjustment rings according to this invention;~
Figures 3 and 4 are axial sections through further nozzles in accordance with this invention; and Figures 5 and 6 are axial sections through details of further arrangements according to the invention.
Specific Description As seen in Figures 1 and 2 a nozzle 2, suitable for use with an extruder to continuously form a synthetic-resin tube, has a rear nozzle part 1 176~
that ls normally fixed on or even may be part of the ex~uder and that is formed with a central passage 21 centered on an axis h. A c~re rod 3 also centered on this axis A lies in this passage and is also usually part of the extruder. A front nozzle part 4 rides via a part-spherical surface 11' on a complementary such surface 11" formed on the part 1 around the passage 21, Thus the front part 4, can be tipped from a position aligned with the axis A so that the gap formed between the front part 4 and the end of the core rod 3 can be adjusted, while no leakage occurs between the surfaces 11' and il", The front part 4 is formed with six angularly equispaced and axially throughgoing bores 7 equispaced from the axis A. Respective screws 8 extend through these bores 7 and are screwed into the part 1. These screws have heads 9 bearing via respective stacks of belleville-washer springs 10 back against the part 4. Thus in any tipped position of the part 4 relative to the part 1 the springs 10 will hold the two tightly together at the surface 11' and 11".
A flange 12 extending radially outwardly from the front of the front part 4 axially confronts an annular bump 14 formed on the confronting front face of the rear part 1. A stack of four rings 13 is provi~ed between this annular bump 14 and flange 12. Each such ring has~ as seen in Figure 2, a planar face 13' that is slightly tipped to the opposite face 13" of the ring 13.
In addition at least the two center rings 13 are provided with radially pro~ect-ing arms 15 by means of which they can be pivoted about the axis A.
When the two rings are offset in 180 opposite positions as seen In Figure 2, the faces 13" are parallel and perpendicular to the axis A. Turning either of the rings 13 from this position tips the outer part 4 on the inner part 1. The slight canting of ~he outer part 4 allows the gap 5 to be adjusted accurately, with the springs 10 pushing it back with enough force, g76~
regardless of the angular position, to prevent leakage between the surfaces 11l and 11".
The arrangement of Figure 3 is identical to that of Figures 1 and 2 except that here one of the rings 13 is secured by screws 22 to the flange 12.
In addition the rear part 1 is not provided with an annular bump, but with at least three angularly equispaced short pistons 16 sliding in long axially extend-ing bores 17 formed in the rear part 1. The pistons 16 always form chambers 18 in the bores 17 which are connected via respective conduits or passages 19 to an electronic/hydraulic controller 20. By adjusting pressure differently in the chambers 18 it is possible to achieve a coarse adjustment of the gap 5 relative-ly easily.
In Figure 4 the pistons 16 bear directly on the part 4 at pockets 23 formed in the rear face of the front part 4. Thus in this arrangement, which ,," ;, ~lol~
c~ '` otherwise is similar to that of Figure 1, the pistons 16 t~ constitute the adjustment e].ements.
Figure 5 shows an arrangements similar to Figure 1 wherein the two rings 13 are formed with teeth 24 meshing via gears 25 with pinions 26 carried on respective motors 27. These motors 27 in turn are operated by an electronic controller, in response to strain-gauge sensors in the nozzle 2. In addition in thi.s arrangement three mainly axially displaceable bolts or screws 28 bear axially forward against the stack of rings 13, and the frontmost ring 13a is unitarily formed with the flange 12. Alternatively the ring 13a could be fixed to the flange 12.
Finally, Figure 6 shows an arrangement like Figure 1, but wherein one of the rings is replaced by an annular array of tapered rollers 13b having a ca.ge that is not illustrated. In this system the rollers 13b make rotating the , .
7~
adjacent rings 13 much easier. Such rollers 13b could also be provided between each ring 13 and the adjacent ring or surface.
In the arrangement according to the ins~ant invention it is possible to achieve an accurate adjustment of the nozzle in a very simple manner. The rings 13 can tip the front part 4 through very small and accurately determined increments. Since it is not necessary to loosen on one side before tightening on another, the adjustment can be carried out rapidly and efficiently.
Claims (12)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A ring nozzle for use with an extruder to continuously form a synthetic-resin tube, the ring nozzle comprising: a substantially stationary back nozzle part having an axially forwardly directed front face and formed with an axially centered passage opening at the face; an axially centered core rod substantially fixed in the passage and extending axially forward past the front face; an annular and movable front nozzle part fitted spacedly around the core rod forward of the front face and forming therewith an axially centered and forwardly open ann-ular gap, the front part having a back face axially confronting the front face of the back part, the front and back faces being formed around the passage and centered on the axis with complementary part-spherical surfaces riding on each other and permitting the front nozzle part to tip limitedly on the back nozzle part and thereby vary the radial dimensions of the gap;
adjustment means including axially centered rings axially engaged between the front and back faces and having flatly axially abutt-ing planar ring faces lying in a plane that is transverse but not perpendicular to the axis of the nozzle, whereby angularly displacing the rings relative to each other tips the front part on the back part, the rings being braced axially between the back and front faces for tipping the front part on the back part and thereby adjusting the gap; and biasing means including springs bearing axially back against the front part for urging the front part axially back against the rings and therethrough back against the back nozzle part.
adjustment means including axially centered rings axially engaged between the front and back faces and having flatly axially abutt-ing planar ring faces lying in a plane that is transverse but not perpendicular to the axis of the nozzle, whereby angularly displacing the rings relative to each other tips the front part on the back part, the rings being braced axially between the back and front faces for tipping the front part on the back part and thereby adjusting the gap; and biasing means including springs bearing axially back against the front part for urging the front part axially back against the rings and therethrough back against the back nozzle part.
2. The ring nozzle defined in claim 1 wherein one of the parts is formed with a radially outwardly projecting flange forming part of the respective face and bearing axially against the rings.
3. The ring nozzle defined in claim 2 wherein the other of the parts is provided on the respective face with an axially projecting annular bump bearing on the set of rings.
4. The ring nozzle defined in claim 1 wherein at least one of the rings is provided with a radially projecting arm, whereby angular displacement of the arm rotates the respective ring.
5. The ring nozzle defined in claim 1 wherein at least one of the rings is formed with an annular array of teeth, the adjustment means including a drivable pinion meshing with the teeth.
6. The ring nozzle defined in claim 1 wherein one of the rings is unitary with one of the parts.
7. The ring nozzle defined in claim 1 wherein one of the rings is fixed on one of the parts.
8. The ring nozzle defined in claim 1 wherein the adjust-ment means include rollers axially engaged with at least one of the rings.
9. The ring nozzle defined in claim 8 wherein the rollers are tapered.
10. The ring nozzle defined in claim 1 wherein one of the parts is provided with respective axially displaceable second adjustment elements bearing axially against the rings at the locations.
11. The ring nozzle defined in claim 1, further comprising an automatic electronic controller connected to the adjustment elements for displacing same.
12. The ring nozzle defined in claim 1 wherein the back part includes bolts projecting axially forward through the front part, the spring means including spring washers engaged around the bolts and bearing axially backward on the front part.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP3138356.4 | 1981-09-26 | ||
| DE3138356 | 1981-09-26 | ||
| DE19823216377 DE3216377A1 (en) | 1981-09-26 | 1982-05-03 | DEVICE FOR PRODUCING TUBES FROM PLASTIC MEASURES |
| DEP3216377.0 | 1982-05-03 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1199764A true CA1199764A (en) | 1986-01-28 |
Family
ID=25796344
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000412166A Expired CA1199764A (en) | 1981-09-26 | 1982-09-24 | Adjustable ring nozzle for extruding synthetic-resin tubing |
Country Status (10)
| Country | Link |
|---|---|
| US (1) | US4464104A (en) |
| EP (1) | EP0075809B1 (en) |
| AU (1) | AU552654B2 (en) |
| BR (1) | BR8205593A (en) |
| CA (1) | CA1199764A (en) |
| DE (2) | DE3216377A1 (en) |
| DK (1) | DK424982A (en) |
| FI (1) | FI77807C (en) |
| GR (1) | GR77594B (en) |
| SU (1) | SU1151198A3 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3424257C2 (en) * | 1984-06-30 | 1986-05-15 | Hermann Berstorff Maschinenbau Gmbh, 3000 Hannover | Equipment for the production of treads for car tires or other profiles or tracks |
| DE3505837C2 (en) * | 1985-02-20 | 1994-06-23 | Battenfeld Extrusionstech | Spray head for the production of pipes made of thermoplastic |
| US4986743A (en) * | 1989-03-13 | 1991-01-22 | Accurate Products Co. | Melt blowing die |
| US5046938A (en) * | 1989-11-01 | 1991-09-10 | Hoover Universal, Inc. | Improved multiple layer die head with adjustable gaps |
| CA2039500C (en) * | 1990-07-18 | 1994-02-15 | Takahisa Kawaguchi | Apparatus for forming bent portion of pipe in apparatus for making bent pipe |
| CA2024735C (en) * | 1990-09-06 | 2001-01-30 | Alexander Maule | Method and apparatus for the production of bricks and the like |
| DE4111228A1 (en) * | 1991-04-08 | 1992-10-15 | Wilhelm Hegler | DEVICE FOR PRODUCING PLASTIC TUBES |
| IT1247920B (en) * | 1991-05-13 | 1995-01-05 | Pirelli Cavi S P A Dir Proprie | EXTRUSION HEAD TO APPLY POLYMERIC MATERIAL COATINGS ON SEMI-FINISHED CYLINDRICAL CONFORMATION WORKS |
| US5464577A (en) * | 1994-01-04 | 1995-11-07 | Minnesota Mining And Manufacturing Company | Method of thickness control for dies |
| US5466402A (en) * | 1994-05-13 | 1995-11-14 | Corma Inc. | Gap adjustment of a plastic flow channel in a plastic part forming device |
| DE19504119C2 (en) * | 1995-02-08 | 2000-07-13 | S Rockstedt Gmbh Maschf | Nozzle head attached to the exit of an extruder |
| US5997272A (en) * | 1996-03-27 | 1999-12-07 | Xerox Corporation | Extruder die insert plate system |
| DE19831495C2 (en) * | 1998-07-14 | 2002-05-08 | Kreyenborg Verwaltungen | Screen changer with assigned work equipment |
| CA2474060A1 (en) * | 2002-02-08 | 2003-08-14 | E. I. Du Pont De Nemours And Company | Slot die |
| DE102004028100B4 (en) * | 2004-06-09 | 2009-09-17 | Thermo-Technik-Systeme Gmbh | extrusion die |
| DE102004034422B4 (en) * | 2004-07-15 | 2006-12-28 | Nordson Corp., Westlake | Application head with spring block supported in the housing |
| DE102004057974B4 (en) * | 2004-11-30 | 2009-05-07 | W. Müller GmbH | Extrusion head with nozzle gap adjustment |
| US7517208B2 (en) * | 2006-10-12 | 2009-04-14 | Husky Injection Molding Systems Ltd. | Injection molding system having a cooperating tapered machine nozzle and barrel head |
| CN101314254B (en) * | 2008-06-27 | 2010-06-23 | 宁波方力集团有限公司 | Extrusion mould head for plastic tube |
| DE102009037738A1 (en) * | 2009-08-17 | 2011-02-24 | Mtu Aero Engines Gmbh | Method for aligning object i.e. work piece during mechanical processing of object in rotation friction welding machine, involves positioning sliding plate at plate surface, and changing object position parallel to surface by sliding plate |
| DE102014103521B3 (en) * | 2014-03-14 | 2015-05-07 | Kraussmaffei Berstorff Gmbh | Tube die heads |
| DE102018204729A1 (en) | 2018-03-28 | 2019-10-02 | Raumedic Ag | Tool head for a hollow profile extruder |
Family Cites Families (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3124839A (en) * | 1964-03-17 | l yaich | ||
| US2665722A (en) * | 1951-02-19 | 1954-01-12 | Magna Engineering Corp | Dado saw assembly |
| US2805446A (en) * | 1953-12-16 | 1957-09-10 | Tno | Extrusion head of an apparatus for the manufacture of tubes or hoses from plastic material |
| CH344838A (en) * | 1954-02-08 | 1960-02-29 | Ici Ltd | Process for the production of foils |
| DE961211C (en) * | 1954-08-27 | 1957-04-04 | Heinrich Koch Maschinenfabrik | Material guide arranged between the screw head and the caliber mandrel in the injection heads of screw presses |
| DE961130C (en) * | 1954-11-07 | 1957-04-04 | Hoechst Ag | Device for the radial adjustment of the nozzle ring on the injection head of an extrusion press for the production of hoses from organic, plastic plastics |
| US2859476A (en) * | 1955-08-01 | 1958-11-11 | Western Plastics Corp | Extrusion apparatus |
| GB941127A (en) * | 1961-03-24 | 1963-11-06 | Kunststoffmaschinen A G | Improved method and device for producing hollow bodies from thermoplastic synthetic material |
| US3184792A (en) * | 1962-12-31 | 1965-05-25 | Nat Distillers Chem Corp | Variable orifice extrusion die |
| US3172437A (en) * | 1963-05-16 | 1965-03-09 | Harry I Hansen | Tiltable saw |
| SE301378B (en) * | 1963-08-27 | 1968-06-04 | Kalle Ag | |
| FR1248751A (en) * | 1964-03-18 | 1966-01-10 | Vibrating device for the prefabrication of tubular, grooved or solid slabs | |
| DE1284621B (en) * | 1966-02-08 | 1968-12-05 | Mueller Willi | Foil die head |
| US3382539A (en) * | 1966-08-04 | 1968-05-14 | Continental Can Co | Extrusion die shell adjustment |
| AT313554B (en) * | 1966-12-30 | 1974-02-25 | Conduco Ag | Device for adjusting the annular gap of a spray head for the production of pipes and hoses made of thermoplastic material |
| DE2023008A1 (en) * | 1970-05-12 | 1971-12-02 | Bekum Maschf Gmbh | Device for the nozzle adjustment on an extrusion head which presses out a profile made of plastic |
| DE7303513U (en) * | 1973-01-31 | 1974-07-11 | Bekum Maschinenfabriken Gmbh | Adjustable nozzle for a spray head for the production of a tubular or tubular profile made of thermoplastic material |
| AT362922B (en) * | 1975-02-26 | 1981-06-25 | Cincinnati Milacron Austria | EXTRUSION |
| US4108590A (en) * | 1977-02-07 | 1978-08-22 | Owens-Illinois, Inc. | Extrusion head |
| DE3001705C2 (en) * | 1980-01-18 | 1984-10-18 | Wavin B.V., Zwolle | Centering device for molding tools of extrusion presses |
| FR2503627A1 (en) * | 1981-04-09 | 1982-10-15 | Raffinage Cie Francaise | HEAD FOR EXTRUSION OF A TUBULAR PARAISON TO AT LEAST ONE LAYER OF MATERIAL |
-
1982
- 1982-05-03 DE DE19823216377 patent/DE3216377A1/en not_active Withdrawn
- 1982-08-24 GR GR69099A patent/GR77594B/el unknown
- 1982-09-09 US US06/416,223 patent/US4464104A/en not_active Expired - Fee Related
- 1982-09-17 SU SU823491805A patent/SU1151198A3/en active
- 1982-09-18 EP EP82108621A patent/EP0075809B1/en not_active Expired
- 1982-09-18 DE DE8282108621T patent/DE3263006D1/en not_active Expired
- 1982-09-21 AU AU88576/82A patent/AU552654B2/en not_active Ceased
- 1982-09-24 CA CA000412166A patent/CA1199764A/en not_active Expired
- 1982-09-24 FI FI823281A patent/FI77807C/en not_active IP Right Cessation
- 1982-09-24 BR BR8205593A patent/BR8205593A/en unknown
- 1982-09-24 DK DK424982A patent/DK424982A/en not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| FI823281A0 (en) | 1982-09-24 |
| FI77807B (en) | 1989-01-31 |
| AU552654B2 (en) | 1986-06-12 |
| EP0075809B1 (en) | 1985-04-10 |
| AU8857682A (en) | 1983-04-14 |
| EP0075809A1 (en) | 1983-04-06 |
| BR8205593A (en) | 1983-08-30 |
| US4464104A (en) | 1984-08-07 |
| DE3263006D1 (en) | 1985-05-15 |
| SU1151198A3 (en) | 1985-04-15 |
| FI823281L (en) | 1983-03-27 |
| GR77594B (en) | 1984-09-25 |
| DE3216377A1 (en) | 1983-06-16 |
| DK424982A (en) | 1983-03-27 |
| FI77807C (en) | 1989-05-10 |
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Legal Events
| Date | Code | Title | Description |
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| MKEX | Expiry | ||
| MKEX | Expiry |
Effective date: 20030128 |