CA2027691C - Pipe manufacturing line - Google Patents
Pipe manufacturing lineInfo
- Publication number
- CA2027691C CA2027691C CA002027691A CA2027691A CA2027691C CA 2027691 C CA2027691 C CA 2027691C CA 002027691 A CA002027691 A CA 002027691A CA 2027691 A CA2027691 A CA 2027691A CA 2027691 C CA2027691 C CA 2027691C
- Authority
- CA
- Canada
- Prior art keywords
- pipe
- basin
- calibrating
- paths
- production
- 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 - Fee Related
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
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/90—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article
- B29C48/901—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article of hollow bodies
- B29C48/903—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article of hollow bodies externally
-
- 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
- B29C48/03—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
- B29C48/13—Articles with a cross-section varying in the longitudinal direction, e.g. corrugated pipes
-
- 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
- B29C48/303—Extrusion nozzles or dies using dies or die parts movable in a closed circuit, e.g. mounted on movable endless support
-
- 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
- B29C48/001—Combinations of extrusion moulding with other shaping operations
- B29C48/0011—Combinations of extrusion moulding with other shaping operations combined with compression moulding
-
- 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
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/90—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article
- B29C48/908—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article characterised by calibrator surface, e.g. structure or holes for lubrication, cooling or venting
-
- 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
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/911—Cooling
- B29C48/9115—Cooling of hollow articles
- B29C48/912—Cooling of hollow articles of tubular films
- B29C48/913—Cooling of hollow articles of tubular films externally
-
- 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
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/919—Thermal treatment of the stream of extruded material, e.g. cooling using a bath, e.g. extruding into an open bath to coagulate or cool the material
-
- 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
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/0015—Making articles of indefinite length, e.g. corrugated tubes
- B29C49/0021—Making articles of indefinite length, e.g. corrugated tubes using moulds or mould parts movable in a closed path, e.g. mounted on movable endless supports
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention relates to a pipe manufacturing line consisting of a production line manufacturing cor-rugated or ribbed pipe. To avoid unnecessary stand-stills, the forming means for pipes to be manufactured, i.e. the corrugator, has forming means for smooth-walled pipe, i.e. a calibrating basin (8), known per se arranged between the form paths (17, 18) of the cor-rugator, to one end of which calibrating basin an extruder (1) normally supplying the corrugator feeds a molten plastic pipe blank (11), the substantially smooth plastic pipe (12) issuing from the other end of said calibrating basin being treated by further treat-ment means (4-7) for corrugated or ribbed pipe.
Description
_. 1 PIPE MANUFACTURING LINE
The invention relates to a pipe manufacturing line consisting of a production line manufacturing corrugated or ribbed pipe.
In the following, the general name corrugated pipe will be used for said pipe types, E.g. Finnish Patent No. 60 825 (published 23 April, 1975), European Patent Application No. 208 055 (published 24 September, 1987) and German Offenlegungsschrifts No. 36 22 775 (published 14 January, 1987) and 36 32 225 (published 16 July, 1987) teach manufacturing lines for corrugated pipes, wherein a formable mass brought into a plastic state is extruded by means of a die between movable form halves pressed against one another to provide a continuous rib flange structure on the exterior of the pipe.
Such a manufacturing line -- including the control unit for movable forms which is called a cor-rugator hereinafter -- is very weighty and rigid, requires exact installation and is in most cases almost too effective in view of the demand of corrugated pipes, wherefore the manufacturing line stands idle for most of the time.
The invention now disclosed is based on the realization of the above problem, and on the one hand on the conception that the line for corrugated pipes has, except for the corrugator, the same manufacturing machinery and means as the line for smooth-walled pipes, and on the other hand on the conception that some corrugator designs are such that the upper and lower paths transporting the form halves may be driven apart for exchange of the moulds as well as maintenance and other equivalent operations. Thus the improved manufacturing line for plastic pipe according to the invention is characterized in that the forming means for the pipes to be produced, i.e. the corrugator, has forming means for smooth pipe, i.e. a calibrating basin, known per se arranged between the form paths of the corrugator, to one end of which calibrating basin an extruder normally supplying the corrugator feeds a molten plastic pipe blank, the substantially smooth plastic pipe issuing from the other end of said calib-rating basin being treated with further treatment means for corrugated or ribbed pipe.
The most significant advantage of the invention is that the expensive manufacturing line need not stand idle, but that without displacing the corrugator and dismounting the installation, normal plastic pipe may be produced, until there is a new demand for corrugated pipes. Thereby the calibrating basin is simply removed, possibly the moulds for the pertinent corrugated pipe are installed or exchanged, the moulds are driven together, and normal production of corrugated pipes is started.
The invention will be explained in the following by means of an example with reference to the accom-panying drawings wherein Figure 1 shows a conventional production line for ribbed pipe Figure 2 shows a calibrating basin for smooth pipe placed within the corrugator in accordance with the invention.
In the production line for ribbed pipe according to Figure 1, an extruder is denoted with reference numeral 1, a die of the extruder with reference numeral 2, a corrugator with reference numeral 3, pipe cooling basins with reference numeral 4, pipe drawing apparatus with reference numeral 5, cutting apparatus with refer-ence numeral 6 and finishing and treating apparatus for a pipe product cut to a predetermined length with reference numeral 7. This manufacturing line essenti-20276gl -ally differs from a manufacturing line for smooth pipe merely in respect of the corrugator 3. In the Figure the corrugator is of a type having two circulation paths for the form means, i.e. moulds, said paths being such that they may be driven apart by means of vertical displacing means A shown in the Figure, which means may be e.g. rotating bars. Corrugators wherein the mould paths are in the horizontal plane and/or the return motion of the moulds is adapted to take place along a separate path are also used. Otherwise the purpose and function of the different devices in a production line of this kind are obvious to a person skilled in the art and are thus not more closely explained herein.
Figure 2 shows, in accordance with the inven-tion, a calibrating basin 8 disposed between thedriven-apart mould forms 9, 10 of the corrugator. A
pipe blank ll issuing from the die of the extruder is fed according to the arrow through a brass calibrating barrel 13 located at one end of the calibrating basin into 2 cooling space having a subatmospheric pressure which will draw the pipe tightly against the inner wall of the calibrating barrel, imparting to the pipe a glassy, smooth surface. The pipe is cooled for the length of the calibrating basin by means of water jets 14 in accordance with the prior art, whereafter it leaves the calibrating basin, drawn by the drawing means 5 (Figure l), as a pipe 12 adjusted to predeter-mined dimensions and cooled. The cooling and the production rate may be improved by using several cool-ing basins 4.
The calibrating basin 8 may be fixed betweenmould forms 9, 10 constituted by series-connected moulds 16 e.g. by fixing it to the mould structure by means of support bars or by making it rest, supported by distance pieces 15, on the moulds 16 as has been -shown in Figure 2. The arrangement of Figure 2 may also be used when the calibrating basin in accordance with one embodiment of the invention is formed by part of the cooling basin 4 for the ribbed pipe (cf. Figure 1) which e.g. is telescopically pushed between the open moulds of the corrugator, as shown in dotted line in Figure 2.
Depending on the structure of the corrugator and the size range of the pipes to be produced, one may also proceed in such a manner that the moulds are removed and the cooling basin 8 is placed between the transport path 17, 18 for the mould forms.
It is obvious to the person skilled in the art that the invention is not restricted to the examples presented above, but the different embodiments of the invention may vary within the scope of the ensuing claims. Instead of the calibrating basin having a sub-atmospheric pressure, one may equally well use pressure calibrating equipment wherein the structural difference is a plug within the pipe blank, making it possible to maintain a superatmospheric pressure within the blank pipe. The moulds may also be employed as a structural part for the calibrating basin. Thereby the basin is constituted by a closed chain of moulds and end ele-ments disposed at the forward and tail end thereof.
The invention relates to a pipe manufacturing line consisting of a production line manufacturing corrugated or ribbed pipe.
In the following, the general name corrugated pipe will be used for said pipe types, E.g. Finnish Patent No. 60 825 (published 23 April, 1975), European Patent Application No. 208 055 (published 24 September, 1987) and German Offenlegungsschrifts No. 36 22 775 (published 14 January, 1987) and 36 32 225 (published 16 July, 1987) teach manufacturing lines for corrugated pipes, wherein a formable mass brought into a plastic state is extruded by means of a die between movable form halves pressed against one another to provide a continuous rib flange structure on the exterior of the pipe.
Such a manufacturing line -- including the control unit for movable forms which is called a cor-rugator hereinafter -- is very weighty and rigid, requires exact installation and is in most cases almost too effective in view of the demand of corrugated pipes, wherefore the manufacturing line stands idle for most of the time.
The invention now disclosed is based on the realization of the above problem, and on the one hand on the conception that the line for corrugated pipes has, except for the corrugator, the same manufacturing machinery and means as the line for smooth-walled pipes, and on the other hand on the conception that some corrugator designs are such that the upper and lower paths transporting the form halves may be driven apart for exchange of the moulds as well as maintenance and other equivalent operations. Thus the improved manufacturing line for plastic pipe according to the invention is characterized in that the forming means for the pipes to be produced, i.e. the corrugator, has forming means for smooth pipe, i.e. a calibrating basin, known per se arranged between the form paths of the corrugator, to one end of which calibrating basin an extruder normally supplying the corrugator feeds a molten plastic pipe blank, the substantially smooth plastic pipe issuing from the other end of said calib-rating basin being treated with further treatment means for corrugated or ribbed pipe.
The most significant advantage of the invention is that the expensive manufacturing line need not stand idle, but that without displacing the corrugator and dismounting the installation, normal plastic pipe may be produced, until there is a new demand for corrugated pipes. Thereby the calibrating basin is simply removed, possibly the moulds for the pertinent corrugated pipe are installed or exchanged, the moulds are driven together, and normal production of corrugated pipes is started.
The invention will be explained in the following by means of an example with reference to the accom-panying drawings wherein Figure 1 shows a conventional production line for ribbed pipe Figure 2 shows a calibrating basin for smooth pipe placed within the corrugator in accordance with the invention.
In the production line for ribbed pipe according to Figure 1, an extruder is denoted with reference numeral 1, a die of the extruder with reference numeral 2, a corrugator with reference numeral 3, pipe cooling basins with reference numeral 4, pipe drawing apparatus with reference numeral 5, cutting apparatus with refer-ence numeral 6 and finishing and treating apparatus for a pipe product cut to a predetermined length with reference numeral 7. This manufacturing line essenti-20276gl -ally differs from a manufacturing line for smooth pipe merely in respect of the corrugator 3. In the Figure the corrugator is of a type having two circulation paths for the form means, i.e. moulds, said paths being such that they may be driven apart by means of vertical displacing means A shown in the Figure, which means may be e.g. rotating bars. Corrugators wherein the mould paths are in the horizontal plane and/or the return motion of the moulds is adapted to take place along a separate path are also used. Otherwise the purpose and function of the different devices in a production line of this kind are obvious to a person skilled in the art and are thus not more closely explained herein.
Figure 2 shows, in accordance with the inven-tion, a calibrating basin 8 disposed between thedriven-apart mould forms 9, 10 of the corrugator. A
pipe blank ll issuing from the die of the extruder is fed according to the arrow through a brass calibrating barrel 13 located at one end of the calibrating basin into 2 cooling space having a subatmospheric pressure which will draw the pipe tightly against the inner wall of the calibrating barrel, imparting to the pipe a glassy, smooth surface. The pipe is cooled for the length of the calibrating basin by means of water jets 14 in accordance with the prior art, whereafter it leaves the calibrating basin, drawn by the drawing means 5 (Figure l), as a pipe 12 adjusted to predeter-mined dimensions and cooled. The cooling and the production rate may be improved by using several cool-ing basins 4.
The calibrating basin 8 may be fixed betweenmould forms 9, 10 constituted by series-connected moulds 16 e.g. by fixing it to the mould structure by means of support bars or by making it rest, supported by distance pieces 15, on the moulds 16 as has been -shown in Figure 2. The arrangement of Figure 2 may also be used when the calibrating basin in accordance with one embodiment of the invention is formed by part of the cooling basin 4 for the ribbed pipe (cf. Figure 1) which e.g. is telescopically pushed between the open moulds of the corrugator, as shown in dotted line in Figure 2.
Depending on the structure of the corrugator and the size range of the pipes to be produced, one may also proceed in such a manner that the moulds are removed and the cooling basin 8 is placed between the transport path 17, 18 for the mould forms.
It is obvious to the person skilled in the art that the invention is not restricted to the examples presented above, but the different embodiments of the invention may vary within the scope of the ensuing claims. Instead of the calibrating basin having a sub-atmospheric pressure, one may equally well use pressure calibrating equipment wherein the structural difference is a plug within the pipe blank, making it possible to maintain a superatmospheric pressure within the blank pipe. The moulds may also be employed as a structural part for the calibrating basin. Thereby the basin is constituted by a closed chain of moulds and end ele-ments disposed at the forward and tail end thereof.
Claims (14)
1. A production-line method for manufacturing corrugated and smooth-walled pipes, comprising:
extruding molten pipe blanks;
moulding one of the molten pipe blanks into a corrugated pipe in form halves that are movable along paths that press the form halves together about the one molten pipe blank;
separating the paths of the form halves from pressing together; and forming another of the molten pipe blanks into a smooth-walled pipe in a calibrating basin when the paths are separated.
extruding molten pipe blanks;
moulding one of the molten pipe blanks into a corrugated pipe in form halves that are movable along paths that press the form halves together about the one molten pipe blank;
separating the paths of the form halves from pressing together; and forming another of the molten pipe blanks into a smooth-walled pipe in a calibrating basin when the paths are separated.
2. A production-line method for manufacturing smooth-walled pipes, comprising:
separating form halves from paths in a corrugator;
inserting a calibrating basin between the paths;
extruding a molten pipe blank;
forming the molten pipe blank into a smooth-walled pipe in the calibrating basin when the paths are separated.
separating form halves from paths in a corrugator;
inserting a calibrating basin between the paths;
extruding a molten pipe blank;
forming the molten pipe blank into a smooth-walled pipe in the calibrating basin when the paths are separated.
3. The production-line method of claim 1, and further comprising treating the corrugated pipe in the calibrating basin.
4. The production-line method of claim 2, and further comprising projecting the calibrating basin into the paths when the form halves are separated.
5. The production-line method of claim 1, and further comprising projecting the calibrating basin into the paths when the form halves are separated.
6. The production-line method of claim 2, and further comprising supporting the calibrating basin on the form halves when the paths thereof are separated when forming the smooth-walled pipe.
7. The production-line method of claim 1, and further comprising supporting the calibrating basin on the form halves when the paths thereof are separated when forming the smooth-walled pipe.
8. The production-line method of claim 4, and further comprising supporting the calibrating basin on the form halves when the paths thereof are separated when forming the smooth-walled pipe.
9. The production-line method of claim 5, and further comprising supporting the calibrating basin on the form halves when the paths thereof are separated when forming the smooth-walled pipe.
10. The production-line method of claim 6, wherein the supporting is by at least one distance piece.
11. The production-line method of claim 7, wherein the supporting is by at least one distance piece.
12. The production-line method of claim 8, wherein the supporting is by at least one distance piece.
13. The production-line method of claim 9, wherein the supporting is by at least one distance piece.
14. A production-line method for manufacturing smooth-walled pipe, comprising:
separating in a corrugator form paths intended for manufacture of corrugated plastic pipe;
inserting a calibrating basin intended for manufacture of smooth-walled plastic pipe between the separated form paths;
extruding a molten pipe blank;
forming a smooth-walled pipe in said calibrating basin by feeding said molten pipe blank into said calibrating basin while it is fixed between said separated form paths.
separating in a corrugator form paths intended for manufacture of corrugated plastic pipe;
inserting a calibrating basin intended for manufacture of smooth-walled plastic pipe between the separated form paths;
extruding a molten pipe blank;
forming a smooth-walled pipe in said calibrating basin by feeding said molten pipe blank into said calibrating basin while it is fixed between said separated form paths.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FI895105A FI83187C (en) | 1989-10-27 | 1989-10-27 | Production line for thin plastic pipes |
| FI895105 | 1989-10-27 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2027691A1 CA2027691A1 (en) | 1991-04-28 |
| CA2027691C true CA2027691C (en) | 1996-01-30 |
Family
ID=8529230
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002027691A Expired - Fee Related CA2027691C (en) | 1989-10-27 | 1990-10-15 | Pipe manufacturing line |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JPH0645169B2 (en) |
| AU (1) | AU636402B2 (en) |
| CA (1) | CA2027691C (en) |
| DE (1) | DE4034254A1 (en) |
| FI (1) | FI83187C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AUPN001594A0 (en) * | 1994-12-12 | 1995-01-12 | Garmond Australia Pty. Ltd. | On-line embossing system for plastic profile extrusion |
| DE19845321C2 (en) * | 1998-10-01 | 2002-03-28 | Unitec Gmbh Tech Entwicklungen | Device for the production of thin-walled smooth plastic pipes with corrugated sections at different distances from each other |
| CA2787679C (en) | 2010-01-22 | 2018-05-22 | Tubi Pty Ltd | Modular pipe formation apparatus |
| CN103568246A (en) * | 2012-08-11 | 2014-02-12 | 宁波康润机械科技有限公司 | Plastic pipe material guide device |
| CN104889728B (en) * | 2014-03-07 | 2017-05-10 | 珠海格力电器股份有限公司 | Connecting pipe forming device |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1083765A (en) * | 1976-12-01 | 1980-08-19 | Gerd P. H. Lupke | Apparatus for producing thermoplastic tubing |
| CA1083766A (en) * | 1977-02-07 | 1980-08-19 | Gerd P.H. Lupke | Apparatus for producing thermoplastic tubing |
| US4136143A (en) * | 1977-02-22 | 1979-01-23 | Lupke Gerd Paul Heinrich | Apparatus for and method of producing corrugated thermoplastic tubing |
| DE3513708C2 (en) * | 1985-04-12 | 1994-04-21 | Drossbach Gmbh & Co Kg | Extrusion head for producing double-walled plastic pipes with cylindrical inner pipe and cross-corrugated outer pipe |
| FI74654C (en) * | 1986-01-13 | 1988-03-10 | Uponor Nv | ANALYZING OVER FREQUENCY FRAMING PROCESSING. |
| FI77405C (en) * | 1986-03-20 | 1989-03-10 | Uponor Nv | Method and apparatus for producing cam flange tubes. |
-
1989
- 1989-10-27 FI FI895105A patent/FI83187C/en not_active IP Right Cessation
-
1990
- 1990-10-15 CA CA002027691A patent/CA2027691C/en not_active Expired - Fee Related
- 1990-10-17 AU AU64845/90A patent/AU636402B2/en not_active Ceased
- 1990-10-25 JP JP2288257A patent/JPH0645169B2/en not_active Expired - Lifetime
- 1990-10-27 DE DE4034254A patent/DE4034254A1/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| FI83187B (en) | 1991-02-28 |
| DE4034254A1 (en) | 1991-05-02 |
| FI895105A0 (en) | 1989-10-27 |
| JPH03164228A (en) | 1991-07-16 |
| AU636402B2 (en) | 1993-04-29 |
| CA2027691A1 (en) | 1991-04-28 |
| AU6484590A (en) | 1991-05-02 |
| DE4034254C2 (en) | 1993-03-04 |
| JPH0645169B2 (en) | 1994-06-15 |
| FI83187C (en) | 1991-06-10 |
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