WO2002060691A1 - A process for the manufacturing of joining profiles - Google Patents

A process for the manufacturing of joining profiles Download PDF

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Publication number
WO2002060691A1
WO2002060691A1 PCT/SE2002/000093 SE0200093W WO02060691A1 WO 2002060691 A1 WO2002060691 A1 WO 2002060691A1 SE 0200093 W SE0200093 W SE 0200093W WO 02060691 A1 WO02060691 A1 WO 02060691A1
Authority
WO
WIPO (PCT)
Prior art keywords
broaching
process according
tool
edges
milling
Prior art date
Application number
PCT/SE2002/000093
Other languages
French (fr)
Inventor
Ola Olofsson
Original Assignee
Pergo Ab
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 Pergo Ab filed Critical Pergo Ab
Priority to CA002435686A priority Critical patent/CA2435686C/en
Priority to EP02716506A priority patent/EP1368185B1/en
Priority to DE60220646T priority patent/DE60220646T2/en
Priority to DK02716506T priority patent/DK1368185T3/en
Publication of WO2002060691A1 publication Critical patent/WO2002060691A1/en

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F15/00—Flooring
    • E04F15/02—Flooring or floor layers composed of a number of similar elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D37/00—Broaching machines or broaching devices
    • B23D37/02—Broaching machines with horizontally-arranged working tools
    • B23D37/04—Broaching machines with horizontally-arranged working tools for broaching inner surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27F—DOVETAILED WORK; TENONS; SLOTTING MACHINES FOR WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES
    • B27F1/00—Dovetailed work; Tenons; Making tongues or grooves; Groove- and- tongue jointed work; Finger- joints
    • B27F1/02—Making tongues or grooves, of indefinite length
    • 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
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/34—Auxiliary operations
    • B29C44/58—Moulds
    • B29C44/582—Moulds for making undercut 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
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/0012—Combinations of extrusion moulding with other shaping operations combined with shaping by internal pressure generated in the material, e.g. foaming
    • 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
    • B29C48/0022—Combinations of extrusion moulding with other shaping operations combined with cutting
    • 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
    • B29C48/12—Articles with an irregular circumference when viewed in cross-section, e.g. window profiles
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/02—Preparation of the material, in the area to be joined, prior to joining or welding
    • B29C66/022—Mechanical pre-treatments, e.g. reshaping
    • B29C66/0224—Mechanical pre-treatments, e.g. reshaping with removal of material
    • B29C66/02245—Abrading, e.g. grinding, sanding, sandblasting or scraping
    • 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
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/04—Condition, form or state of moulded material or of the material to be shaped cellular or porous
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F2201/00—Joining sheets or plates or panels
    • E04F2201/01—Joining sheets, plates or panels with edges in abutting relationship
    • E04F2201/0107—Joining sheets, plates or panels with edges in abutting relationship by moving the sheets, plates or panels substantially in their own plane, perpendicular to the abutting edges
    • E04F2201/0115—Joining sheets, plates or panels with edges in abutting relationship by moving the sheets, plates or panels substantially in their own plane, perpendicular to the abutting edges with snap action of the edge connectors
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F2201/00—Joining sheets or plates or panels
    • E04F2201/04—Other details of tongues or grooves
    • E04F2201/044—Other details of tongues or grooves with tongues or grooves comprising elements which are not manufactured in one piece with the sheets, plates or panels but which are permanently fixedly connected to the sheets, plates or panels, e.g. at the factory
    • E04F2201/049—Other details of tongues or grooves with tongues or grooves comprising elements which are not manufactured in one piece with the sheets, plates or panels but which are permanently fixedly connected to the sheets, plates or panels, e.g. at the factory wherein the elements are made of organic plastics with or without reinforcements or filling materials
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F2201/00—Joining sheets or plates or panels
    • E04F2201/05—Separate connectors or inserts, e.g. pegs, pins, keys or strips
    • E04F2201/0523—Separate tongues; Interlocking keys, e.g. joining mouldings of circular, square or rectangular shape
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49995—Shaping one-piece blank by removing material
    • Y10T29/49996—Successive distinct removal operations
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/51—Plural diverse manufacturing apparatus including means for metal shaping or assembling
    • Y10T29/5136—Separate tool stations for selective or successive operation on work
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T409/00—Gear cutting, milling, or planing
    • Y10T409/30—Milling
    • Y10T409/303976—Milling with means to control temperature or lubricate
    • Y10T409/304032—Cutter or work
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T409/00—Gear cutting, milling, or planing
    • Y10T409/30—Milling
    • Y10T409/304536—Milling including means to infeed work to cutter
    • Y10T409/304648—Milling including means to infeed work to cutter with control means energized in response to activator stimulated by condition sensor
    • Y10T409/304704—In response to cutter or cutter carriage
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T409/00—Gear cutting, milling, or planing
    • Y10T409/40—Broaching
    • Y10T409/400175—Process
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T409/00—Gear cutting, milling, or planing
    • Y10T409/40—Broaching
    • Y10T409/40035—Broaching with control means energized in response to activator stimulated by condition sensor

Definitions

  • Tongue and groove are nowadays normally made by milling which is a rational method. It is however difficult to achieve complex cross-sections with undercuts with traditional milling, especially in narrow grooves. It is known to achieve undercuts to some degree by utilising more than one milling tool with different rotation axis. The problem with this method is however that it is very difficult to obtain desirable tolerances due to vibrations and flexing in the machine since there must be some distance between the different milling tools. The cross-section possible to manufacture by this method is also limited since the milling tool will have to rotate through the opening of for example a groove. It is desirable to achieve a process where the tolerance play is good, undercuts with sharper angles are possible to manufacture and where dust and particles form the milling isn't obstructing the process.
  • the invention relates to a process for the manufacturing of longitudinal profiles such and tongue and groove on boards wherein the process includes the steps; a) Moulding a substantial part of the profile cross-section by means of milling with a milling tool. b) Fine moulding undercuts in at least the groove of the board by means of broaching utilising at least one broaching tool.
  • the milling tool is adjustably fixed in a conveying machine, which machine feeds the boards past the milling tool during the milling operation.
  • the broaching tool is preferably adjustably fixed in the same conveying machine, which machine feeds the board past the broaching tool.
  • the process is most suitably used for machining tongue and groove on thin boards such as floor boards.
  • the tongue and groove may, through the process, be provided with a functionality which allows them to snap join. Accordingly, the moulding of the profiles is initiated by milling a substantial part of the material to be removed with a traditional milling tool.
  • the final shape of the profiles are then achieved by broaching.
  • the undercuts are also achieved in the broaching stage of the process.
  • the coating suitably comprises a substance selected from the group; wax, oil a polymeric material being exemplified by a thermoplastic polyolefin and a lacquer being exemplified by a UN-curing lacquer.
  • the broaching tool preferably comprises broaching edges, a broaching body and a broaching clamp.
  • the broaching body is suitably provided with internal cooling channels for a cooling media, the cooling media being selected from the group consisting of a gas and a liquid.
  • the broaching body is suitably also provided with a temperature sensor used for guiding the cooling.
  • the temperature sensor is either an infrared sensor directed towards one or more broaching edges or a conductive sensor attached to the broaching body.
  • the broaching tool is suitably provided with at least one nozzle for blowing air on the broaching edges. The air blown on the broaching edges may serve two purposes the first one being to remove dust and particles from the cutting edges the second one being to cool the broaching tool.
  • the broaching tool is suitably also provided with an air and dust evacuation duct which evacuates dust and particles from the broaching edges.
  • the air blown on the edges may suitably also pulsate for better cleaning of the edges.
  • the front edge portions of the broaching edges are suitably concave in order to increase the stability during the cutting operation and at the same time ensure secure removal of the waste material so that no or very little burr is formed.
  • the side edge portions of the broaching edges are suitably also concave in order to increase the stability during the cutting operation and at the same time ensure secure removal of the waste material so that no or very little burr is formed.
  • -figure la - Id shows, in a cross-section perspective view, a longitudinal profile 2 in the form of a groove 2" in an edge of a board 1 at different steps in the process according to one embodiment of the invention.
  • -figure 2a - 2d shows, in a cross-section perspective view, a longitudinal profile 2 in the form of a tongue 2' in an edge of a board 1 at different steps in the process according to one embodiment of the invention.
  • -figure 3a - 3d shows, in a cross-section perspective view, a longitudinal profile 2 in the form of a groove 2" in an edge of a board 1 at different steps in the process according to a second embodiment of the invention.
  • -figure 4a - 4d shows, in a cross-section perspective view, a longitudinal profile 2 in the form of a tongue in an edge of a board 1 at different steps in the process according to a second embodiment of the invention.
  • -figure 5 shows, in cross-section perspective view, a broaching tool 3 for fine moulding undercuts 20 in a tongue 2'.
  • -figure 6 shows, in cross-section perspective view, a broaching tool 3 for fine moulding undercuts 20 in a groove 2".
  • figure la - Id shows, in a cross-section perspective view, a longitudinal profile 2 in the form of a groove 2" in an edge of a board 1 at different steps in the process according to one embodiment of the invention.
  • the drawing is simplified by enlarging certain objects in the cross-section geometry in order to enhance the understanding of the invention.
  • Figure la shows a board 1 with a core and a decorative top layer before the moulding of the longitudinal profile 2.
  • Figure lb shows the board 1 after milling of a substantial part of a groove 2".
  • the main part of the material to be removed in the making of the finished groove 2" is here removed by a traditional rotating milling tool.
  • Such a tool is well suited for removing larger quantities of material as the tool itself will convey the material from the groove 2".
  • Figure lc shows the board 1 after applying an impregnation 4 on the edge. It is advantageous to apply the impregnation 4 at the stage after milling since the impregnation 4 only will penetrate to a certain distance from the surface. It is possible to utilise several known substances for this impregnation where oil and wax are the most commonly used.
  • Figure Id shows the board 1 after the fine moulding by broaching utilising a broaching tool 3 similar to the one shown in figure 6.
  • the impregnation applied in the earlier stage of the process will act as a lubricant as well as a bonding agent which will make the surface of the joint smoother and at the same time minimise the risk for forming of burr.
  • the later is a rather common problem, specially in cases where the core of the board 1 is made of fibre board like MDF (medium density fibre board) or HDF (high density fibre board).
  • MDF medium density fibre board
  • HDF high density fibre board.
  • a smoother and more well defined surface in critical parts of a joint will render the possibility to design the joint with a decreased play. This, in its turn, will render the possibility to make smaller undercuts 20 and hooks 21 with maintained tearing resistance or increasing the tearing resistance by maintaining the dimension of the undercuts 20 and hooks 21.
  • the advantages with broaching is furthermore that it will be possible to manufacture profiles 2 with cross-section geometry impossible to manufacture with traditional milling, as the one performed in earlier stages of the invention.
  • Figure 2a - 2d shows, in a cross-section perspective view, a longitudinal profile 2 in the form of a tongue 2' in an edge of a board 1 at different steps in the process according to one embodiment of the invention.
  • the drawing is simplified by enlarging certain objects in the cross-section geometry in order to enhance the understanding of the invention.
  • Figure 2a shows a board 1 with a core and a decorative top layer before the moulding of the longitudinal profile 2.
  • Figure 2b shows the board 1 after milling of a substantial part of a tongue 2'.
  • the main part of the material to be removed in the making of the finished tongue 2 1 is here removed by a traditional rotating milling tool.
  • Such a tool is well suited for removing larger quantities of material as the tool itself will convey the material from the tongue 2'.
  • Figure 2c shows the board 1 after applying an impregnation 4 on the edge. It is advantageous to apply the impregnation 4 at the stage after milling since the impregnation 4 only will penetrate to a certain distance from the surface. It is possible to utilise several known substances for this impregnation where oil and wax are the most commonly used.
  • Figure 2d shows the board 1 after the fine moulding by broaching utilising a broaching tool 3 similar to the one shown in figure 5.
  • the impregnation applied in the earlier stage of the process will act as a lubricant as well as a bonding agent which will make the surface of the joint smoother and at the same time minimise the risk for forming of burr.
  • the later is a rather common problem, specially in cases where the core of the board 1 is made of fibre board like MDF (medium density fibre board) or HDF (high density fibre board).
  • MDF medium density fibre board
  • HDF high density fibre board.
  • a smoother and more well defined surface in critical parts of a joint will render the possibility to design the joint with a decreased play. This, in its turn, will render the possibility to make smaller undercuts 20 and hooks 21 with maintained tearing resistance or increasing the tearing resistance by maintaining the dimension of the undercuts 20 and hooks 21.
  • the advantages with broaching is furthermore that it will be possible to manufacture profiles 2 with cross-section geometry impossible to manufacture with traditional milling, as the one performed in earlier stages of the invention.
  • Figure 3a - 3d shows, in a cross-section perspective view, a longitudinal profile 2 in the form of a groove 2" in an edge of a board 1 at different steps in the process according to a second embodiment of the invention.
  • the drawing is simplified by enlarging certain objects in the cross-section geometry in order to enhance the understanding of the invention.
  • Figure 3a shows a board 1 with a core and a decorative top layer before the moulding of the longitudinal profile 2.
  • Figure 3b shows the board 1 after milling a groove 2". More material than the final shape of the groove 2" is here removed by a traditional rotating milling tool. Such a tool is well suited for removing larger quantities of material as the tool itself will convey the material from the groove 2".
  • Figure 3c shows the board 1 after applying a polymeric material 5 to the groove 2".
  • the polymeric material 5 may suitably be a thermoplastic material which is molten and applied in the groove 2" in a process which reminds of extrusion.
  • the thickness of the board 1 will be in the range 5 - 12 mm.
  • the thickness of the polymeric material 5 applied will then have to be in the range 0.6 - 1.5 mm in order to match the geometry of the joint.
  • a thermoplastic material applied in a molten state will have to be cooled before final steps of the moulding of the joint. This may be achieved by blowing cooled air and/or by pressing a cooling slider of a thermally conductive material towards the joint.
  • Figure 3d shows the board 1 after the fine moulding by broaching utilising a broaching tool 3 similar to the one shown in figure 6.
  • the polymeric material 5 applied in the earlier stage of the process will make the surface of the joint smoother and at the same time minimise the risk for forming of burr.
  • the later is a rather common problem, specially in cases where the core of the board 1 is made of fibre board like MDF (medium density fibre board) or HDF (high density fibre board).
  • MDF medium density fibre board
  • HDF high density fibre board
  • Figure 4a - 4d shows, in a cross-section perspective view, a longitudinal profile 2 in the form of a tongue 2' in an edge of a board 1 at different steps in the process according to a second embodiment of the invention.
  • the drawing is simplified by enlarging certain objects in the cross-section geometry in order to enhance the understanding of the invention.
  • Figure 4a shows a board 1 with a core and a decorative top layer before the moulding of the longitudinal profile 2.
  • Figure 4b shows the board 1 after milling a tongue 2'. More material than the final shape of the tongue 2' is here removed by a traditional rotating milling tool. Such a tool is well suited for removing larger quantities of material as the tool itself will convey the material from the tongue 2'.
  • Figure 4c shows the board 1 after applying a polymeric material 5 to the tongue 2'.
  • the polymeric material 5 may suitably be a thermoplastic material which is molten and applied on the tongue 2' in a process which reminds of extrusion.
  • the thickness of the board 1 will be in the range 5 - 12 mm.
  • the thickness of the polymeric material 5 applied will then have to be in the range 0.6 - 1.5 mm in order to match the geometry of the joint.
  • a thermoplastic material applied in a molten state will have to be cooled before final steps of the moulding of the joint. This may be achieved by blowing cooled air and/or by pressing a cooling slider of a thermally conductive material towards the joint.
  • FIG. 4d shows the board 1 after the fine moulding by broaching utilising a broaching tool 3 similar to the one shown in figure 5.
  • the polymeric material 5 applied in the earlier stage of the process will make the surface of the joint smoother and at the same time minimise the risk for forming of burr.
  • the latter is a rather common problem, specially in cases where the core of the board 1 is made of fibre board like MDF (medium density fibre board) or HDF (high density fibre board).
  • MDF medium density fibre board
  • HDF high density fibre board
  • FIG. 5 shows, in cross-section perspective view, a broaching tool 3 for fine moulding undercuts 20 in a tongue 2'.
  • the broaching tool 3 shown in figure 5 is a simplified version of the broaching tool 3 used to achieve the profile 2 cross-sections shown in figure 2d and 4d above.
  • the broaching tool 3 is used for fine moulding the tongue 2' so that hooks 21 and a good matching of a groove 2", manufactured according to the present invention, are achieved.
  • the broaching is initiated after having milled a substantial part of the tongue 2' so that most of the material to be removed in order to obtain a tongue 2' as shown in selected embodiments of the invention, is removed by the milling process ensuring a more secure operation in the broaching stage.
  • the broaching tool 3 is adjustably fixed in the conveying machine, which machine feeds the board past the broaching tool 3.
  • the broaching tool 3 comprises broaching edges 31, a broaching body 32 and a broaching clamp.
  • the broaching body 32 is provided with internal cooling channels for a cooling media.
  • the cooling media may be gas and a liquid.
  • a temperature sensor used for guiding the cooling broaching body 32 is advantageously also used. The manufacturing tolerances will be better if the temperature in the broaching tool 3 is maintained within a selected range.
  • the temperature sensor may be an infrared sensor directed towards one or more broaching edges 31 or a conductive sensor attached to the broaching body 32 itself. It also possible to achieve a narrow temperature range in the broaching tool 3 by controlling the temperature of the cooling media.
  • the broaching tool 3 may also be provided with one or more nozzles blowing air on the broaching edges 31.
  • the air stream is adjusted so that it will cool the broaching edges 31 as well as removing dust and particles from the same.
  • the broaching tool 3 may furthermore be provided with an air and dust evacuation duct which evacuates dust and particles from the broaching tool 3.
  • the air blown on the broaching edges 31 suitably pulsates for improved cleaning of the broaching edges 31.
  • the front edge portions 31 ' and the side edge 31 " portions of the broaching edges 31 are concave in order to increase the stability during the cutting operation and at the same time ensure secure removal of the waste material so that no, or very little burr is formed.
  • FIG. 6 shows, in cross-section perspective view, a broaching tool 3 for fine moulding undercuts 20 in a groove 2".
  • the broaching tool 3 shown in figure 6 is a simplified version of the broaching tool 3 used to achieve the profile 2 cross-sections shown in figure Id and 3d above.
  • the broaching tool 3 is used for fine moulding the groove 2" so that undercuts 20 and a good matching of a tongue 2', manufactured according to the present invention, are achieved.
  • the broaching is initiated after having milled a substantial part of the groove 2" so that most of the material to be removed in order to obtain a groove 2" as shown in selected embodiments of the invention, is removed by the milling process ensuring a more secure operation in the broaching stage.
  • the broaching tool 3 is adjustably fixed in the conveying machine, which machine feeds the board past the broaching tool 3.
  • the broaching tool 3 comprises broaching edges 31 , a broaching body 32 and a broaching clamp.
  • the broaching body 32 is provided with internal cooling channels for a cooling media.
  • the cooling media may be gas and a liquid.
  • a temperature sensor used for guiding the cooling broaching body 32 is advantageously also used. The manufacturing tolerances will be better if the temperature in the broaching tool 3 is maintained within a selected range.
  • the temperature sensor may be an infrared sensor directed towards one or more broaching edges 31 or a conductive sensor attached to the broaching body 32 itself. It also possible to achieve a narrow temperature range in the broaching tool 3 by controlling the temperature of the cooling media.
  • the broaching tool 3 may also be provided with one or more nozzles blowing air on the broaching edges 31.
  • the air stream is adjusted so that it will cool the broaching edges 31 as well as removing dust and particles from the same.
  • the broaching tool 3 may furthermore be provided with an air and dust evacuation duct which evacuates dust and particles from the broaching tool 3.
  • the air blown on the broaching edges 31 suitably pulsates for improved cleaning of the broaching edges 31.
  • the front edge portions 31 ' and the side edge 31 " portions of the broaching edges 31 are concave in order to increase the stability during the cutting operation and at the same time ensure secure removal of the waste material so that no, or very little burr is formed.
  • the invention is not limited by the embodiments shown since it can be varied in different ways within the scope of the invention. It for example possible to moulding a substantial part of the profile 2 by milling followed by fine moulding by broaching without an intermediate impregnation or coating as shown in selected embodiments of the invention. It is also possible to apply impregnation or coating at later stages of the process.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Forests & Forestry (AREA)
  • Wood Science & Technology (AREA)
  • Structural Engineering (AREA)
  • Milling Processes (AREA)
  • Milling, Broaching, Filing, Reaming, And Others (AREA)
  • Connection Of Plates (AREA)
  • Auxiliary Devices For Machine Tools (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)
  • Joining Of Building Structures In Genera (AREA)
  • Component Parts Of Construction Machinery (AREA)

Abstract

A process for the manufacturing of longitudinal profiles such and tongue and groove on boards wherein the process includes the steps; a) Moulding a substantial part of the profile cross-section by means of milling with a milling tool. b) Fine moulding undercuts in at least the groove of the board by means of broaching utilising at least one broaching tool.

Description

A process for the manufacturing of joining profiles.
Different kinds of boards and other flat elements which are joined to each other by means of tongue and groove are well known. Tongue and groove are nowadays normally made by milling which is a rational method. It is however difficult to achieve complex cross-sections with undercuts with traditional milling, especially in narrow grooves. It is known to achieve undercuts to some degree by utilising more than one milling tool with different rotation axis. The problem with this method is however that it is very difficult to obtain desirable tolerances due to vibrations and flexing in the machine since there must be some distance between the different milling tools. The cross-section possible to manufacture by this method is also limited since the milling tool will have to rotate through the opening of for example a groove. It is desirable to achieve a process where the tolerance play is good, undercuts with sharper angles are possible to manufacture and where dust and particles form the milling isn't obstructing the process.
It has, according to the process of the present invention, been made possible to achieve profiles such as tongue and groove on boards, with better tolerances, undercuts with sharper angles and without having dust and particles from the milling process obstructing the process.
Accordingly, the invention relates to a process for the manufacturing of longitudinal profiles such and tongue and groove on boards wherein the process includes the steps; a) Moulding a substantial part of the profile cross-section by means of milling with a milling tool. b) Fine moulding undercuts in at least the groove of the board by means of broaching utilising at least one broaching tool.
The milling tool is adjustably fixed in a conveying machine, which machine feeds the boards past the milling tool during the milling operation. The broaching tool is preferably adjustably fixed in the same conveying machine, which machine feeds the board past the broaching tool. The process is most suitably used for machining tongue and groove on thin boards such as floor boards. The tongue and groove may, through the process, be provided with a functionality which allows them to snap join. Accordingly, the moulding of the profiles is initiated by milling a substantial part of the material to be removed with a traditional milling tool. The final shape of the profiles are then achieved by broaching. The undercuts are also achieved in the broaching stage of the process.
If materials like fibre board or particle board are used it known that burrs often occur which will obstruct the functionality in the tighter parts of a snap joint. This can be avoided by adding the step coating of the milled profile section before the broaching stage where the fine moulding takes place. The coating suitably comprises a substance selected from the group; wax, oil a polymeric material being exemplified by a thermoplastic polyolefin and a lacquer being exemplified by a UN-curing lacquer.
The broaching tool preferably comprises broaching edges, a broaching body and a broaching clamp. The broaching body is suitably provided with internal cooling channels for a cooling media, the cooling media being selected from the group consisting of a gas and a liquid. The broaching body is suitably also provided with a temperature sensor used for guiding the cooling. The temperature sensor is either an infrared sensor directed towards one or more broaching edges or a conductive sensor attached to the broaching body. The broaching tool is suitably provided with at least one nozzle for blowing air on the broaching edges. The air blown on the broaching edges may serve two purposes the first one being to remove dust and particles from the cutting edges the second one being to cool the broaching tool. It is possible to use the blown air as either a complement to, or a replacement for the internal cooling. The broaching tool is suitably also provided with an air and dust evacuation duct which evacuates dust and particles from the broaching edges. The air blown on the edges may suitably also pulsate for better cleaning of the edges.
The front edge portions of the broaching edges are suitably concave in order to increase the stability during the cutting operation and at the same time ensure secure removal of the waste material so that no or very little burr is formed. The side edge portions of the broaching edges are suitably also concave in order to increase the stability during the cutting operation and at the same time ensure secure removal of the waste material so that no or very little burr is formed.
The invention is described further in connection to the enclosed drawings showing different embodiments of the invention whereby,
-figure la - Id shows, in a cross-section perspective view, a longitudinal profile 2 in the form of a groove 2" in an edge of a board 1 at different steps in the process according to one embodiment of the invention.
-figure 2a - 2d shows, in a cross-section perspective view, a longitudinal profile 2 in the form of a tongue 2' in an edge of a board 1 at different steps in the process according to one embodiment of the invention.
-figure 3a - 3d shows, in a cross-section perspective view, a longitudinal profile 2 in the form of a groove 2" in an edge of a board 1 at different steps in the process according to a second embodiment of the invention.
-figure 4a - 4d shows, in a cross-section perspective view, a longitudinal profile 2 in the form of a tongue in an edge of a board 1 at different steps in the process according to a second embodiment of the invention.
-figure 5 shows, in cross-section perspective view, a broaching tool 3 for fine moulding undercuts 20 in a tongue 2'.
-figure 6 shows, in cross-section perspective view, a broaching tool 3 for fine moulding undercuts 20 in a groove 2".
Accordingly figure la - Id shows, in a cross-section perspective view, a longitudinal profile 2 in the form of a groove 2" in an edge of a board 1 at different steps in the process according to one embodiment of the invention. The drawing is simplified by enlarging certain objects in the cross-section geometry in order to enhance the understanding of the invention. Figure la shows a board 1 with a core and a decorative top layer before the moulding of the longitudinal profile 2. Figure lb shows the board 1 after milling of a substantial part of a groove 2". The main part of the material to be removed in the making of the finished groove 2" is here removed by a traditional rotating milling tool. Such a tool is well suited for removing larger quantities of material as the tool itself will convey the material from the groove 2". Figure lc shows the board 1 after applying an impregnation 4 on the edge. It is advantageous to apply the impregnation 4 at the stage after milling since the impregnation 4 only will penetrate to a certain distance from the surface. It is possible to utilise several known substances for this impregnation where oil and wax are the most commonly used. Figure Id shows the board 1 after the fine moulding by broaching utilising a broaching tool 3 similar to the one shown in figure 6. The impregnation applied in the earlier stage of the process will act as a lubricant as well as a bonding agent which will make the surface of the joint smoother and at the same time minimise the risk for forming of burr. The later is a rather common problem, specially in cases where the core of the board 1 is made of fibre board like MDF (medium density fibre board) or HDF (high density fibre board). A smoother and more well defined surface in critical parts of a joint will render the possibility to design the joint with a decreased play. This, in its turn, will render the possibility to make smaller undercuts 20 and hooks 21 with maintained tearing resistance or increasing the tearing resistance by maintaining the dimension of the undercuts 20 and hooks 21. The advantages with broaching is furthermore that it will be possible to manufacture profiles 2 with cross-section geometry impossible to manufacture with traditional milling, as the one performed in earlier stages of the invention.
Figure 2a - 2d shows, in a cross-section perspective view, a longitudinal profile 2 in the form of a tongue 2' in an edge of a board 1 at different steps in the process according to one embodiment of the invention. The drawing is simplified by enlarging certain objects in the cross-section geometry in order to enhance the understanding of the invention. Figure 2a shows a board 1 with a core and a decorative top layer before the moulding of the longitudinal profile 2. Figure 2b shows the board 1 after milling of a substantial part of a tongue 2'. The main part of the material to be removed in the making of the finished tongue 21 is here removed by a traditional rotating milling tool. Such a tool is well suited for removing larger quantities of material as the tool itself will convey the material from the tongue 2'. Figure 2c shows the board 1 after applying an impregnation 4 on the edge. It is advantageous to apply the impregnation 4 at the stage after milling since the impregnation 4 only will penetrate to a certain distance from the surface. It is possible to utilise several known substances for this impregnation where oil and wax are the most commonly used. Figure 2d shows the board 1 after the fine moulding by broaching utilising a broaching tool 3 similar to the one shown in figure 5. The impregnation applied in the earlier stage of the process will act as a lubricant as well as a bonding agent which will make the surface of the joint smoother and at the same time minimise the risk for forming of burr. The later is a rather common problem, specially in cases where the core of the board 1 is made of fibre board like MDF (medium density fibre board) or HDF (high density fibre board). A smoother and more well defined surface in critical parts of a joint will render the possibility to design the joint with a decreased play. This, in its turn, will render the possibility to make smaller undercuts 20 and hooks 21 with maintained tearing resistance or increasing the tearing resistance by maintaining the dimension of the undercuts 20 and hooks 21. The advantages with broaching is furthermore that it will be possible to manufacture profiles 2 with cross-section geometry impossible to manufacture with traditional milling, as the one performed in earlier stages of the invention.
Figure 3a - 3d shows, in a cross-section perspective view, a longitudinal profile 2 in the form of a groove 2" in an edge of a board 1 at different steps in the process according to a second embodiment of the invention. The drawing is simplified by enlarging certain objects in the cross-section geometry in order to enhance the understanding of the invention. Figure 3a shows a board 1 with a core and a decorative top layer before the moulding of the longitudinal profile 2. Figure 3b shows the board 1 after milling a groove 2". More material than the final shape of the groove 2" is here removed by a traditional rotating milling tool. Such a tool is well suited for removing larger quantities of material as the tool itself will convey the material from the groove 2". Figure 3c shows the board 1 after applying a polymeric material 5 to the groove 2". The polymeric material 5 may suitably be a thermoplastic material which is molten and applied in the groove 2" in a process which reminds of extrusion. In cases where the board 1 is used as a floor covering material the thickness of the board 1 will be in the range 5 - 12 mm. The thickness of the polymeric material 5 applied will then have to be in the range 0.6 - 1.5 mm in order to match the geometry of the joint. A thermoplastic material applied in a molten state will have to be cooled before final steps of the moulding of the joint. This may be achieved by blowing cooled air and/or by pressing a cooling slider of a thermally conductive material towards the joint. The latter may also be used for pre shaping the polymeric material 5 before the final fine moulding. Figure 3d shows the board 1 after the fine moulding by broaching utilising a broaching tool 3 similar to the one shown in figure 6. The polymeric material 5 applied in the earlier stage of the process will make the surface of the joint smoother and at the same time minimise the risk for forming of burr. The later is a rather common problem, specially in cases where the core of the board 1 is made of fibre board like MDF (medium density fibre board) or HDF (high density fibre board). A smoother and more well defined surface in critical parts of a joint will render the possibility to design the joint with a decreased play. This, in its turn, will render the possibility to make smaller undercuts 20 and hooks 21 with maintained tearing resistance or increasing the tearing resistance by maintaining the dimension of the undercuts 20 and hooks 21. The advantages with broaching is furthermore that it will be possible to manufacture profiles 2 with cross-section geometry impossible to manufacture with traditional milling, as the one performed in earlier stages of the invention.
Figure 4a - 4d shows, in a cross-section perspective view, a longitudinal profile 2 in the form of a tongue 2' in an edge of a board 1 at different steps in the process according to a second embodiment of the invention. The drawing is simplified by enlarging certain objects in the cross-section geometry in order to enhance the understanding of the invention. Figure 4a shows a board 1 with a core and a decorative top layer before the moulding of the longitudinal profile 2. Figure 4b shows the board 1 after milling a tongue 2'. More material than the final shape of the tongue 2' is here removed by a traditional rotating milling tool. Such a tool is well suited for removing larger quantities of material as the tool itself will convey the material from the tongue 2'. Figure 4c shows the board 1 after applying a polymeric material 5 to the tongue 2'. The polymeric material 5 may suitably be a thermoplastic material which is molten and applied on the tongue 2' in a process which reminds of extrusion. In cases where the board 1 is used as a floor covering material the thickness of the board 1 will be in the range 5 - 12 mm. The thickness of the polymeric material 5 applied will then have to be in the range 0.6 - 1.5 mm in order to match the geometry of the joint. A thermoplastic material applied in a molten state will have to be cooled before final steps of the moulding of the joint. This may be achieved by blowing cooled air and/or by pressing a cooling slider of a thermally conductive material towards the joint. The latter may also be used for pre shaping the polymeric material 5 before the final fine moulding. Figure 4d shows the board 1 after the fine moulding by broaching utilising a broaching tool 3 similar to the one shown in figure 5. The polymeric material 5 applied in the earlier stage of the process will make the surface of the joint smoother and at the same time minimise the risk for forming of burr. The latter is a rather common problem, specially in cases where the core of the board 1 is made of fibre board like MDF (medium density fibre board) or HDF (high density fibre board). A smoother and more well defined surface in critical parts of a joint will render the possibility to design the joint with a decreased play. This, in its turn, will render the possibility to make smaller undercuts 20 and hooks 21 with maintained tearing resistance or increasing the tearing resistance by maintaining the dimension of the undercuts 20 and hooks 21. The advantages with broaching is furthermore that it will be possible to manufacture profiles 2 with cross-section geometry impossible to manufacture with traditional milling, as the one performed in earlier stages of the invention.
Figure 5 shows, in cross-section perspective view, a broaching tool 3 for fine moulding undercuts 20 in a tongue 2'. The broaching tool 3 shown in figure 5 is a simplified version of the broaching tool 3 used to achieve the profile 2 cross-sections shown in figure 2d and 4d above. The broaching tool 3 is used for fine moulding the tongue 2' so that hooks 21 and a good matching of a groove 2", manufactured according to the present invention, are achieved. The broaching is initiated after having milled a substantial part of the tongue 2' so that most of the material to be removed in order to obtain a tongue 2' as shown in selected embodiments of the invention, is removed by the milling process ensuring a more secure operation in the broaching stage. The broaching tool 3 is adjustably fixed in the conveying machine, which machine feeds the board past the broaching tool 3.
The broaching tool 3 comprises broaching edges 31, a broaching body 32 and a broaching clamp. The broaching body 32 is provided with internal cooling channels for a cooling media. The cooling media may be gas and a liquid. A temperature sensor used for guiding the cooling broaching body 32 is advantageously also used. The manufacturing tolerances will be better if the temperature in the broaching tool 3 is maintained within a selected range. The temperature sensor may be an infrared sensor directed towards one or more broaching edges 31 or a conductive sensor attached to the broaching body 32 itself. It also possible to achieve a narrow temperature range in the broaching tool 3 by controlling the temperature of the cooling media. The broaching tool 3 may also be provided with one or more nozzles blowing air on the broaching edges 31. The air stream is adjusted so that it will cool the broaching edges 31 as well as removing dust and particles from the same. The broaching tool 3 may furthermore be provided with an air and dust evacuation duct which evacuates dust and particles from the broaching tool 3. The air blown on the broaching edges 31 suitably pulsates for improved cleaning of the broaching edges 31.
The front edge portions 31 ' and the side edge 31 " portions of the broaching edges 31 are concave in order to increase the stability during the cutting operation and at the same time ensure secure removal of the waste material so that no, or very little burr is formed.
-figure 6 shows, in cross-section perspective view, a broaching tool 3 for fine moulding undercuts 20 in a groove 2". The broaching tool 3 shown in figure 6 is a simplified version of the broaching tool 3 used to achieve the profile 2 cross-sections shown in figure Id and 3d above. The broaching tool 3 is used for fine moulding the groove 2" so that undercuts 20 and a good matching of a tongue 2', manufactured according to the present invention, are achieved. The broaching is initiated after having milled a substantial part of the groove 2" so that most of the material to be removed in order to obtain a groove 2" as shown in selected embodiments of the invention, is removed by the milling process ensuring a more secure operation in the broaching stage. The broaching tool 3 is adjustably fixed in the conveying machine, which machine feeds the board past the broaching tool 3.
The broaching tool 3 comprises broaching edges 31 , a broaching body 32 and a broaching clamp. The broaching body 32 is provided with internal cooling channels for a cooling media. The cooling media may be gas and a liquid. A temperature sensor used for guiding the cooling broaching body 32 is advantageously also used. The manufacturing tolerances will be better if the temperature in the broaching tool 3 is maintained within a selected range. The temperature sensor may be an infrared sensor directed towards one or more broaching edges 31 or a conductive sensor attached to the broaching body 32 itself. It also possible to achieve a narrow temperature range in the broaching tool 3 by controlling the temperature of the cooling media. The broaching tool 3 may also be provided with one or more nozzles blowing air on the broaching edges 31. The air stream is adjusted so that it will cool the broaching edges 31 as well as removing dust and particles from the same. The broaching tool 3 may furthermore be provided with an air and dust evacuation duct which evacuates dust and particles from the broaching tool 3. The air blown on the broaching edges 31 suitably pulsates for improved cleaning of the broaching edges 31.
The front edge portions 31 ' and the side edge 31 " portions of the broaching edges 31 are concave in order to increase the stability during the cutting operation and at the same time ensure secure removal of the waste material so that no, or very little burr is formed.
The invention is not limited by the embodiments shown since it can be varied in different ways within the scope of the invention. It for example possible to moulding a substantial part of the profile 2 by milling followed by fine moulding by broaching without an intermediate impregnation or coating as shown in selected embodiments of the invention. It is also possible to apply impregnation or coating at later stages of the process.

Claims

WE CLAIM
1. A process for the manufacturing of longitudinal profiles (2) such and tongue (2') and groove (2") on boards (1) wherein the process includes the steps, a) moulding a substantial part of the profile (2) cross-section by means of milling with a milling tool, b) fine moulding undercuts (20) in at least the groove (2') of the board (1) by means of broaching utilising at least one broaching tool (3).
2. A process according to claim 1 wherein the milling tool is adjustably fixed in a conveying machine, which machine feeds the boards (1) past the milling tool during the milling operation.
3. A process according to claim 2 wherein the broaching tool (3) is adjustably fixed in the conveying machine, which machine feeds the board past the broaching tool (3).
4. A process according to claim 1 wherein the process further comprises the step coating of the milled profile section before the fine moulding by broaching.
5. A process according to claim 4 wherein the coating process comprises wax or oil.
6. A process according to claim 4 wherein the coating process comprises a polymeric material such as a thermoplastic polyolefin.
7. A process according to claim 4 wherein the coating process comprises a lacquer such as a UN-curing lacquer.
8. A process according to any of the claims 1 - 3 wherein the broaching tool (3) comprises broaching edges (31), a broaching body (32) and a broaching clamp.
9. A process according to claim 8 wherein the broaching body (32) is provided with internal cooling channels for a cooling media, the cooling media being selected from the group consisting of a gas and a liquid.
10. A process according to claim 9 wherein the broaching body (32) is provided with a temperature sensor used for guiding the cooling.
11. A process according to claim 10 wherein the temperature sensor is an infrared sensor directed towards one or more broaching edges (31).
12. A process according to claim 10 wherein the temperature sensor is a conductive sensor attached to the broaching body (32).
13. A process according to claim 8 wherein the broaching tool (3) is provided with at least one nozzle for blowing air on the broaching edges (31).
14. A process according to claim 8 wherein the broaching tool (3) is provided with an air and dust evacuation duct which evacuates dust and particles from the broaching edges (31).
15. A process according to claim 13 wherein the broaching tool (3) further is provided with an air and dust evacuation duct which evacuates dust and particles from the broaching edges (31).
16. A process according to claim 13 wherein the air blown on the broaching edges (31) pulsates for better cleaning of the broaching edges (31).
17. A process according to claim 8 wherein the front edge portions (31 ') of the broaching edges (31) are concave.
18. A process according to claim 8 wherein the side edge (31 ") portions of the broaching edges (31) are concave.
PCT/SE2002/000093 2001-01-31 2002-01-24 A process for the manufacturing of joining profiles WO2002060691A1 (en)

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CA002435686A CA2435686C (en) 2001-01-31 2002-01-24 A process for the manufacturing of joining profiles
EP02716506A EP1368185B1 (en) 2001-01-31 2002-01-24 A process for the manufacturing of joining profiles
DE60220646T DE60220646T2 (en) 2001-01-31 2002-01-24 PROCESS FOR PRODUCING COMPOUND PROFILES
DK02716506T DK1368185T3 (en) 2001-01-31 2002-01-24 A process for making profiles for joining

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SE0100276A SE520084C2 (en) 2001-01-31 2001-01-31 Procedure for making merge profiles

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ATE364497T1 (en) 2007-07-15

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