WO2004045833A1 - Bending pvc profiles with heaters and cylinders - Google Patents

Bending pvc profiles with heaters and cylinders Download PDF

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Publication number
WO2004045833A1
WO2004045833A1 PCT/YU2003/000032 YU0300032W WO2004045833A1 WO 2004045833 A1 WO2004045833 A1 WO 2004045833A1 YU 0300032 W YU0300032 W YU 0300032W WO 2004045833 A1 WO2004045833 A1 WO 2004045833A1
Authority
WO
WIPO (PCT)
Prior art keywords
pvc
profile
bending
profiles
heaters
Prior art date
Application number
PCT/YU2003/000032
Other languages
French (fr)
Inventor
Uros Turanjanin
Original Assignee
Uros Turanjanin
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Uros Turanjanin filed Critical Uros Turanjanin
Priority to AU2003302119A priority Critical patent/AU2003302119A1/en
Publication of WO2004045833A1 publication Critical patent/WO2004045833A1/en

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
    • B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
    • B29C53/02—Bending or folding
    • B29C53/08—Bending or folding of tubes or other profiled members
    • B29C53/083—Bending or folding of tubes or other profiled members bending longitudinally, i.e. modifying the curvature of the tube axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D7/00—Bending rods, profiles, or tubes
    • B21D7/08—Bending rods, profiles, or tubes by passing between rollers or through a curved die
    • 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
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
    • B29C35/04—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould using liquids, gas or steam
    • B29C35/045—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould using liquids, gas or steam using gas or flames
    • 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
    • B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
    • B29C53/80—Component parts, details or accessories; Auxiliary operations
    • B29C53/84—Heating or cooling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2027/00—Use of polyvinylhalogenides or derivatives thereof as moulding material
    • B29K2027/06—PVC, i.e. polyvinylchloride
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/001—Profiled members, e.g. beams, sections
    • B29L2031/003—Profiled members, e.g. beams, sections having a profiled transverse cross-section
    • B29L2031/005—Profiled members, e.g. beams, sections having a profiled transverse cross-section for making window frames
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/001—Profiled members, e.g. beams, sections
    • B29L2031/008—Profiled members, e.g. beams, sections having a longitudinal cross-section

Definitions

  • the invention belongs to the area of aluminum carpentry (locksmithery), and it enables the bending of PVC-profiles with three plastic cylinders and heaters, which heat the PVC-profile and by moving the PVC- profile to the left and right between plastic cylinders, the bending of PVC- profiles used for producing arch PVC-ca ⁇ entry (windows, doors, skylights) occurs.
  • the invention solves a completely new way of bending PVC-profiles with three plastic cylinders and heaters which heat the PVC-profile which then bends as a result of the movement of the middle cylinder towards the PVC-profile.
  • the bending of the PVC-profiles is similar to the bending of aluminum profiles except from the fact that the PVC profiles are in this case heated and bent along with the steel profile.
  • the bending of PVC-profiles has so far been performed solely in hot (glycerin) oil and hot air where the PVC-profile is heated up to a pulpy state and then set into curved frames where it gets the desired diameter of the PVC arch after the cooling.
  • the bending of PVC-profiles is performed with the help of profiled plastic cylinders between which the PVC-profile moves and gradually bends with the assistance of two or three heaters, which blow hot air and are ten centimeters away from the PVC-profiles.
  • This kind of bending and the present technique of bending PVC-profiles is forty times cheaper.
  • the range of bending is much larger because it does not depend on the length of the profiled joint elements that preserve the shape of the PVC-profile.
  • the strength of the arch is the same as the strength at the verticals because there is a steal "TJ" profile both at the vertical sides and at the arch, unlike the present bending where PVC- profiles are not bent with this steal "TJ” tin.
  • the speed of the bending is the same as before, but it can be increased if the PVC-profile is put into a heated chamber, which will soften the profile and speed up the bending between the cylinders, along with the steel reinforcement in the PVC-profile.
  • Picture 1 - represents the starting point of the PVC-profiles in the bending machine with heaters that heat the PVC-profile.
  • Picture 2 - represents the section of the back plastic cylinders and PVC-profiles.
  • Picture 3 - represents the section of the front cylinder and the PVC- profile.
  • the pictures represent the technique of bending PVC-profiles (6) between the plastic cylinders (2 and 3) and by the heaters (4 and 5) using a standard machine for bending aluminum profiles (1).
  • the desired PVC-profile is taken.
  • Two technological supplements (T), picture (1), are added to the calculated L.
  • the distance between the heater and the PVC profile is 80-150 mm depending on the desired diameter.
  • the bending of PVC profiles starts by the rolling of the back cylinders (2) up to the point marked on the profile, obtained by the formula (L) where the middle cylinder (3) strikes and gradually moves towards the PVC profile.
  • the profile moves left and right to the final points the whole time and thus the bending starts and lasts until the required arch is obtained.
  • the arch bends into a smaller diameter 30-40 mm because of the releasing and retreating of the middle cylinder (3) and the extraction of the PVC profile (6) from the machine when the diameter increases by 30-40 mm and thus the desired arch is obtained.

Abstract

Bending PVC-profiles with heaters and cylinders (picture 1) is in the area of PVC carpentry; the manufacture of windows, doors, skylights etc from PVC profiles. The technique of bending relates to arch carpentry produced from PVC-profiles. The very technique for bending PVC-profiles is performed on the machine for bending aluminum profiles (1) with the addition of heaters (4 and 5) that heat the PVC-profile (6) with hot air and thus soften the PVC-profile set between plastic cylinders (2 and 3) and by moving the profile (6) to the left and right by turning the two back cylinders (2) and moving the cylinder (3) towards the PVC-profile (6), the bending of the PVC-profile occurs, along with the steel reinforcements which are bent together with the PVC-profile (7).

Description

Bending PVC profiles with heaters and cylinders
The area of the technique that the invention relates to
The invention belongs to the area of aluminum carpentry (locksmithery), and it enables the bending of PVC-profiles with three plastic cylinders and heaters, which heat the PVC-profile and by moving the PVC- profile to the left and right between plastic cylinders, the bending of PVC- profiles used for producing arch PVC-caφentry (windows, doors, skylights) occurs.
The technical issue
The invention solves a completely new way of bending PVC-profiles with three plastic cylinders and heaters which heat the PVC-profile which then bends as a result of the movement of the middle cylinder towards the PVC-profile. The bending of the PVC-profiles is similar to the bending of aluminum profiles except from the fact that the PVC profiles are in this case heated and bent along with the steel profile. The bending of PVC-profiles has so far been performed solely in hot (glycerin) oil and hot air where the PVC-profile is heated up to a pulpy state and then set into curved frames where it gets the desired diameter of the PVC arch after the cooling.
The state of the technique
Present bending of PVC-profiles is extremely expensive because of the expensive profiled outer and inner caterpillar treads, which have the task of preserving outer edges and the appearance of PVC-profiles.
Present bending of PVC-profiles is on average up to forty times more expensive than the invention when it comes to tools used for bending. Apart from that, the heating of PVC-profiles is much cheaper than the present heating in hot oil and tub. This has been solved with heaters, which blow hot air into the PVC-profile. Stating the essence of the invention
The bending of PVC-profiles is performed with the help of profiled plastic cylinders between which the PVC-profile moves and gradually bends with the assistance of two or three heaters, which blow hot air and are ten centimeters away from the PVC-profiles. The difference between this kind of bending and the present technique of bending PVC-profiles is that this kind of technique is forty times cheaper. The range of bending is much larger because it does not depend on the length of the profiled joint elements that preserve the shape of the PVC-profile. The strength of the arch is the same as the strength at the verticals because there is a steal "TJ" profile both at the vertical sides and at the arch, unlike the present bending where PVC- profiles are not bent with this steal "TJ" tin. The speed of the bending is the same as before, but it can be increased if the PVC-profile is put into a heated chamber, which will soften the profile and speed up the bending between the cylinders, along with the steel reinforcement in the PVC-profile.
Short description of the sketches
The invention of the new technique of bending has been described in detail in the example of the performance presented in the sketch where:
- Picture 1 - represents the starting point of the PVC-profiles in the bending machine with heaters that heat the PVC-profile.
- Picture 2 - represents the section of the back plastic cylinders and PVC-profiles.
- Picture 3 - represents the section of the front cylinder and the PVC- profile.
The detailed description of the invention
The pictures represent the technique of bending PVC-profiles (6) between the plastic cylinders (2 and 3) and by the heaters (4 and 5) using a standard machine for bending aluminum profiles (1).
In accordance with the idea of the invention of the technique of bending with cylinders and heaters, this is the following procedure:
The desired PVC-profile is taken. The final point of the profile obtained from the formula for the regular arch (L=Rp) is marked, and for the clip (L=Rpα/l 80) also. Two technological supplements (T), picture (1), are added to the calculated L. When the PVC-profile is cut to its total length (Lu=L+2T) it is then filled with quartz or sifted sand. Plugs are placed at the ends of the profiles, stopping the spilling of the sand from the PVC profile (6). Then, the PVC profile (6) is placed between the profiled plastic cylinders (2 and 3). In the meantime, heaters (4 and 5) are switched on, which blow hot air up to 120 C. The distance between the heater and the PVC profile is 80-150 mm depending on the desired diameter. The bending of PVC profiles starts by the rolling of the back cylinders (2) up to the point marked on the profile, obtained by the formula (L) where the middle cylinder (3) strikes and gradually moves towards the PVC profile. The profile moves left and right to the final points the whole time and thus the bending starts and lasts until the required arch is obtained. Depending on the diameter, the arch bends into a smaller diameter 30-40 mm because of the releasing and retreating of the middle cylinder (3) and the extraction of the PVC profile (6) from the machine when the diameter increases by 30-40 mm and thus the desired arch is obtained. The obtained arch is cooled by compressed air for about ten minutes and then the sand is taken out and the PVC profile is cleaned (whiped). Bending of the PVC profile is ended this way. The appearance of cylinders 2 and 3 along with the PVC-profile (the section) has been displayed in pictures 2 and 3.

Claims

The patent request
1. Bending PVC-profiles is in the present technique performed by joint profiled cateφillar treads which surround the PVC-profile (6) and enter the inner part of the profile, and thus the outer appearance of the PVC-profile is preserved. The bending of PVC-profiles by heaters and cylinders is marked by the fact that, instead of extremely expensive profiled cateφillar treads, plastic cylinders are used (2 and 3), profiled according to the PVC-profile (pictures 2 and 3) and the inner part of the PVC-profile (6) is filled with quartz sand, and steel reinforcements which are bent together with the PVC-profile (7).
2. Bending PVC-profiles is in the present technology performed by heating the PVC-profile in hot glycerin oil, requiring a tub and oil heaters. The bending of PVC-profiles by heaters and cylinders is marked by the fact that, instead of using hot glycerin oil, three heaters that blow hot air are used, which softens the PVC-profile and obtains the desired diameter in an incomparable way.
PCT/YU2003/000032 2002-11-20 2003-11-04 Bending pvc profiles with heaters and cylinders WO2004045833A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2003302119A AU2003302119A1 (en) 2002-11-20 2003-11-04 Bending pvc profiles with heaters and cylinders

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
YUP-875/02 2002-11-20
YUP087502 2002-11-20

Publications (1)

Publication Number Publication Date
WO2004045833A1 true WO2004045833A1 (en) 2004-06-03

Family

ID=32327173

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/YU2003/000032 WO2004045833A1 (en) 2002-11-20 2003-11-04 Bending pvc profiles with heaters and cylinders

Country Status (2)

Country Link
AU (1) AU2003302119A1 (en)
WO (1) WO2004045833A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102989848A (en) * 2012-10-15 2013-03-27 铜陵有色建安钢构有限责任公司 Heavy I-beam bending forming control process
US20130221576A1 (en) * 2012-02-24 2013-08-29 Dana Industries Inc. Method and Apparatus for Forming a Plastic Work Piece
CN105537340A (en) * 2016-01-19 2016-05-04 张家港市旭骏机械部件有限公司 Bending forming device for wind-shielding rods of car sunroofs
CN108673868A (en) * 2018-04-26 2018-10-19 周晓红 A kind of construction modeling pipe bending apparatus

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2216082A1 (en) * 1973-02-07 1974-08-30 Klein Ets Georges Bending extruded PVC section - in which workpiece is heated while in bent condition, followed by cooling
US3957032A (en) * 1972-03-13 1976-05-18 Jelesko Anton F E Pipe bending apparatus
GB2116087A (en) * 1982-03-09 1983-09-21 Consort Aluminium Ltd Apparatus for curving profiled elongate elements
DE29821938U1 (en) * 1998-11-02 1999-04-22 Frye Josef Profiled strand made of plastic
US6054685A (en) * 1998-05-01 2000-04-25 Reinbold; Theo Method for the arc-like shaping of profiled strands or strand sections consisting of a thermoplastic material

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3957032A (en) * 1972-03-13 1976-05-18 Jelesko Anton F E Pipe bending apparatus
FR2216082A1 (en) * 1973-02-07 1974-08-30 Klein Ets Georges Bending extruded PVC section - in which workpiece is heated while in bent condition, followed by cooling
GB2116087A (en) * 1982-03-09 1983-09-21 Consort Aluminium Ltd Apparatus for curving profiled elongate elements
US6054685A (en) * 1998-05-01 2000-04-25 Reinbold; Theo Method for the arc-like shaping of profiled strands or strand sections consisting of a thermoplastic material
DE29821938U1 (en) * 1998-11-02 1999-04-22 Frye Josef Profiled strand made of plastic

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130221576A1 (en) * 2012-02-24 2013-08-29 Dana Industries Inc. Method and Apparatus for Forming a Plastic Work Piece
CN102989848A (en) * 2012-10-15 2013-03-27 铜陵有色建安钢构有限责任公司 Heavy I-beam bending forming control process
CN105537340A (en) * 2016-01-19 2016-05-04 张家港市旭骏机械部件有限公司 Bending forming device for wind-shielding rods of car sunroofs
CN105537340B (en) * 2016-01-19 2019-04-19 张家港市旭骏机械部件有限公司 A kind of vehicle dormer window keeps out the wind rod bending molding machine
CN108673868A (en) * 2018-04-26 2018-10-19 周晓红 A kind of construction modeling pipe bending apparatus
CN108673868B (en) * 2018-04-26 2020-05-22 林忠达 Pipe bending equipment is moulded in construction

Also Published As

Publication number Publication date
AU2003302119A1 (en) 2004-06-15

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