Classifications

• • E—FIXED CONSTRUCTIONS
  • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
  • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
  • E06B3/00—Window sashes, door leaves, or like elements for closing wall or like openings; Layout of fixed or moving closures, e.g. windows in wall or like openings; Features of rigidly-mounted outer frames relating to the mounting of wing frames
  • E06B3/04—Wing frames not characterised by the manner of movement
  • E06B3/06—Single frames
  • E06B3/08—Constructions depending on the use of specified materials
  • E06B3/20—Constructions depending on the use of specified materials of plastics
  • E06B3/22—Hollow frames
  • E06B3/221—Hollow frames with the frame member having local reinforcements in some parts of its cross-section or with a filled cavity
  • E06B3/222—Hollow frames with the frame member having local reinforcements in some parts of its cross-section or with a filled cavity with internal prefabricated reinforcing section members inserted after manufacturing of the hollow frame
• • E—FIXED CONSTRUCTIONS
  • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
  • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
  • E06B3/00—Window sashes, door leaves, or like elements for closing wall or like openings; Layout of fixed or moving closures, e.g. windows in wall or like openings; Features of rigidly-mounted outer frames relating to the mounting of wing frames
  • E06B3/96—Corner joints or edge joints for windows, doors, or the like frames or wings
  • E06B3/9604—Welded or soldered joints
  • E06B3/9608—Mitre joints
• • E—FIXED CONSTRUCTIONS
  • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
  • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
  • E06B3/00—Window sashes, door leaves, or like elements for closing wall or like openings; Layout of fixed or moving closures, e.g. windows in wall or like openings; Features of rigidly-mounted outer frames relating to the mounting of wing frames
  • E06B3/96—Corner joints or edge joints for windows, doors, or the like frames or wings
  • E06B3/964—Corner joints or edge joints for windows, doors, or the like frames or wings using separate connection pieces, e.g. T-connection pieces
  • E06B3/9642—Butt type joints with at least one frame member cut off square; T-shape joints
• • E—FIXED CONSTRUCTIONS
  • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
  • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
  • E06B3/00—Window sashes, door leaves, or like elements for closing wall or like openings; Layout of fixed or moving closures, e.g. windows in wall or like openings; Features of rigidly-mounted outer frames relating to the mounting of wing frames
  • E06B3/96—Corner joints or edge joints for windows, doors, or the like frames or wings
  • E06B3/964—Corner joints or edge joints for windows, doors, or the like frames or wings using separate connection pieces, e.g. T-connection pieces
  • E06B3/968—Corner joints or edge joints for windows, doors, or the like frames or wings using separate connection pieces, e.g. T-connection pieces characterised by the way the connecting pieces are fixed in or on the frame members
  • E06B3/9681—Corner joints or edge joints for windows, doors, or the like frames or wings using separate connection pieces, e.g. T-connection pieces characterised by the way the connecting pieces are fixed in or on the frame members by press fit or adhesion

Definitions

• the present invention pertains to a method of joining a first profile and a second profile in a miter joint, whereby the first profile and the second profile have a different cross-section.
• the invention also pertains to a corner piece used in such a method, and a window system based on such a method.
• the joint is preferably a miter joint.
• two PVC profiles that have been cut to a miter on both sides are heated with a heated plate (welding mirror) and then pressed together. This creates a welding burr, which is subsequently cleaned up by machine operations.
• PVC profiles used in the manufacturing of window frames typically have several hollow chambers, one of which is designed to receive a metal reinforcement rod. During the welding of dissimilar profiles, one of the chambers of one profile will not be sealed off by its counterpart in the other profile, leading to a risk of ingress of moisture and dirt.
• dissimilar profiles will present dissimilar contact surfaces when cut, leading to a reduced welding area and hence a reduced weld strength.
• European patent application no. EP 3 181 794 A1 discloses joining two hollow chamber profiles (made of plastic in the miter area), which have the same construction depths but different face widths and which each have an overlap on their inner side and a wall forming the visible surface of this inner side and covering the overlap, by means of a method which comprises the following steps: the hollow chamber profiles are cut to length or trimmed, forming a miter surface at 45° to the longitudinal extension; the hollow chamber profiles are welded together in the miter area; partial area of the welded corner is removed by machining, whereby the wall covering the overlap remains as the first overlap and a part of the wall forming the visible surface of the other side overlaps the profile area projecting behind it as a further overlap, and the milled miter area is covered by means of an end cap.
• the present invention aims at resolving the above mentioned problems and avoiding the use of an end cap, which is highly visible to users on both sides of the door, and which may be considered unaesthetic.
• the present invention aims at improving the water tightness of the profiles, increasing the service life of the metal reinforcement rod.
• the present invention aims at improving the load capacity of the load capacity, with respect to the state of the art.
• the first profile and the second profile have a different cross-section.
• the method according to the present invention comprises steps of:
• the corner piece allows to join in a more aesthetic way two profiles with different sightlines as only a miter joint is visible from outside.
• first connecting surface of the corner piece similar to the second connection surface of the second profile.
• the first and the second profile are made of PVC.
• the weight of the window system is reduced.
• the method comprises gluing the primary portion into the cavity of the first profile via an opening.
• the connection between the first profile and the corner piece is secured. More advantageously, tightness of the window is improved.
• the connecting comprises welding the second profile to the secondary portion.
• the welding guarantees a secure connection between the profile and the corner piece, improving the stability of the window system.
• the welding can be carried out by a seamless welding machine.
• no polishing has to be performed on the window system.
• polishing a weld burr created between the first profile and the second profile during said joining by means of a mirror welding machine. Specifically, this occurs when the welding operation is carried out by mirror welding.
• a more aesthetically pleasing window system is obtained after polishing the weld burr created between the first and the second profile.
• a method of joining profiles to form a miter joint 6 is disclosed.
• a portion of a first profile 1 is shown in Figure 3 and Figure 10 and it has a first connection end 11.
• the first profile 1 extends along its longitudinal direction X.
• the first connection end 11 of the first profile 1 is finished substantially perpendicularly with respect to its longitudinal direction X.
• the first connection end 11 forms an angle a with respect to the longitudinal direction X.
• the angle ⁇ is comprised between 60° and 90° as a counter-clockwise rotation with respect to the longitudinal direction X.
• the disclosed range of the angle ⁇ is exemplary and not limiting. It is clear to the skilled person that the angle ⁇ could have any value between 0 and 180 degree angle.
• the first connection end 11 is configured to adhere to a corner piece 3.
• a portion of a second profile 2 is shown in Figure 2b and it has a second connection end 21.
• the second profile 2 extend along its longitudinal direction Y.
• the second connection end 21 is finished at a 45 degree angle relative to its longitudinal direction Y.
• the first profile 1 and the second profile 2 are made of PVC.
• the longitudinal direction X of the first profile 1 is perpendicular to the longitudinal direction Y of the second profile 2, as shown in Figure 1 .
• the first depth D1 of the first profile 1 along the direction Z and the second depth D2 of the second profile 2 along the direction Z are equal.
• a first width W1 of the first profile 1 along the longitudinal direction Y is larger than a second width W2 of the second profile 2 along the longitudinal direction X, as visible in Figures 2a, 2b and 3 .
• the method comprises a first step of providing a corner piece 3, shown in Figure 5 .
• the corner piece 3 comprises a primary portion 31 and a secondary portion 32.
• the secondary portion 32 extends substantially perpendicularly to the primary portion 31.
• the corner piece 3 will be described in more detail in a subsequent section of the present description.
• the method comprises a step of gluing the primary portion 31 into a cavity 4 of the first profile 1 via an opening 41, as shown in Figures 4-6 .
• the opening 41 is positioned at the first connection end 11.
• the method comprises a sub-step of applying glue on the primary portion 31, as shown in Figure 4 .
• the glue is applied on an attachment surface 33 of the primary portion, which will be described in more detail.
• the method comprises a subsequent step of inserting the primary portion 31 into the cavity 4 at the first connection end 11 of the first profile 1.
• the glue on the attachment surface 33 of the primary portion 31 is configured to be in contact with the first connection end 11 of the first profile 1.
• the primary portion 31 is inserted in the profile with the largest width.
• the primary portion 31 is glued into the cavity 4 via a sealant.
• the sealant seals the cavity 4 of the first profile 1 from external agents, such as water, improving the water tightness of the window system 5.
• the corner piece 3 is coupled to the first profile 1 with a pre-mounted seal.
• the pre-mounted seal does not need to be glued by means of the sealant to guarantee the tightness of the window system 5.
• the method comprises a further step of connecting a first connecting surface 22 of the secondary portion 32 of the corner piece 3 with a second connecting surface 23 at the second connection end 21 of the second profile 2 so that the first connecting surface 22 and the second connecting surface 23 form a miter joint 6.
• the step of connecting the first connecting surface 22 with the second connecting surface 23 comprises a sub-step of welding the second profile 2 to the secondary portion 32.
• the sub-step of welding is carried out by a seamless welding machine.
• a seamless welding machine there is no welding burr to clean.
• the sub-step of welding produces a weld burr.
• the sub-step of welding is carried out via a mirror welding machine.
• the method further comprises a step of polishing a weld burr created between the first profile 1 and the second profile 2 during the joining.
• polishing occurs manually or via partially automated operations, since part of the weld burr is positioned in an area which cannot be access by most processing machines.
• the polishing step is carried out according to the specific needs. Even more preferably, the step of polishing is carried out via welding machines that can also perform polishing, such as Graf machines.
• the method comprises a pre-milling step. Still preferably, the pre-milling step is performed before the step of inserting the primary portion 31 into the cavity 4 of the first profile 1.
• the pre-milling step is performed on the profile with the largest width. In the present disclosure, pre-milling is performed on the first profile 1.
• Figure 2a shows a perspective view of the first profile 1, before pre-milling. Before pre-milling, the first connection end 11 of the first profile 1 is finished at a 45 degree angle relative to its longitudinal direction X.
• Figure 3 shows a perspective view of the first profile 1, after pre-milling. After pre-milling, the first connection end 11 of the first profile 1 is finished substantially perpendicularly with respect to its longitudinal direction X.
• the milling is performed before joining the profiles so that only a single profile is manipulated, instead of the window system 5.
• the corner piece 3 is made of a polymeric material.
• the corner piece 3 is made of PVC.
• the corner piece 3 is produced by injection molding.
• the primary portion 31 is configured to be inserted into a cavity 4 of a first profile 1. It is clear that the first profile 1 may comprise a plurality of cavities 4.
• the primary portion 31 is configured to be inserted into a cavity 4 of a first profile 1 via an open end 13 at a first connection end 11 of said first profile 1.
• the connection end 11 is finished substantially perpendicularly with respect to its longitudinal direction X'.
• the longitudinal direction X' of the primary portion 31 is parallel to the longitudinal direction X of the first profile 1.
• the corner piece 3 may comprise a plurality of primary portions 31, projecting along the longitudinal direction X' and each configured to be inserted in a respective cavity 4.
• a corner piece 3 provides a prolonged service life of the window system 5 due to the improved dynamic load capacity.
• the primary portion 31 comprises a first couple of sides 39 a substantially parallel to each other and to the direction Z. Still preferably, the primary portion 31 comprises a second couple of sides 39 b, substantially parallel to each other and substantially orthogonal to the first couple of sides 39 a.
• the secondary portion 32 extends substantially perpendicularly to said primary portion 31.
• the secondary portion 32 extends along a longitudinal direction Y'.
• the longitudinal direction Y' of the secondary portion is parallel to the longitudinal direction Y of the second profile 2.
• the first connection end 11 is configured to adhere to the primary portion 31.
• the cavity 4 of the first profile 1, in which the primary portion 31 is inserted, is delimited by a wall 43.
• the wall 43 comprises an internal surface 42, visible in Figure 3 , which is configured to face the primary portion 31.
• the wall 43 comprises an external surface 44 facing the external environment, visible in Figure 1 .
• the primary portion 31 comprises a perimetral wall 36 extending along the longitudinal direction X'. Still preferably, the perimetral wall 36 defines a cavity 38, as visible from Figure 4 . Even more preferably, the perimetral wall 36 comprises an external surface 36 a and an inner surface 36 b .
• the external surface 36 a of the perimetral wall 36 of the primary portion 31 is configured to face the internal surface 42 of the wall 43 of the cavity 4, when the primary portion 31 is inserted in the cavity 4.
• the inner surface 36 b of the perimetral wall 36 faces the cavity 38 of the primary portion 31.
• the primary portion 31 comprises an attachment surface 33 that extends along the longitudinal direction X' of the primary portion 31 and it is configured to be glued to the internal surface 42 of the wall 43 delimiting the cavity 4 of the first profile 1.
• the attachment surface 33 extends along the perimeter of the external surface 36 a of the perimetral wall 36 of the primary portion 31, as shown in Figure 4 .
• the attachment surface 33 is positioned on a first end 37 of the primary portion 31 in contact with the secondary portion 32.
• the glue is placed on the attachment surface 33 of the primary portion 31.
• the first profile 1 comprises an attachment surface that extends along the longitudinal direction X of the internal surface 42 of the wall 43.
• the attachment surface of the first profile 1 is configured to be attached to the attachment surface 33 of the primary portion 31 by means of the glue.
• the attachment surface of the cavity 4 extends along the perimeter of the internal surface 42 of the wall 43. Still preferably, the attachment surface is positioned substantially at the opening 41 of the cavity 4.
• the primary portion 31 of the corner piece 3 comprises a first set of features 35 extending along the longitudinal direction X', as visible from Figure 4 .
• the cavity 4 comprises a second set of features 45 on the internal surface 42 of the wall 43, configured to engage with the first set of features 35 in a form-fitting manner.
• An example of the first and second set of features 35, 45 is shown in Figure 11 .
• the primary portion 31 comprises a plurality of grooves 35 a and ridges 35 b extending along the longitudinal direction X' of the primary portion 31.
• the grooves 35 a and the ridges are arranged on the external surface 36 a of the perimetral wall 36 of the primary portion 31.
• the grooves 35 a and the ridges 35 b are configured to be coupled with respective ridges 45 a and grooves 45 b extending in the cavity 4 along the longitudinal direction X of the first profile 1.
• the coupling of grooves 35 a, 45 b and ridges 35 b, 45 a of the primary portion 31 and of the first profile 1 provides a stronger joint.
• the primary portion 31 comprises a plurality of grooves 35 a .
• the first profile 1 comprises ridges 45 a , configured to be coupled with the grooves 35 a of the primary portion 31.
• the primary portion 31 comprises a plurality of ridges 35 b.
• the first profile 1 comprises grooves 45 b, configured to be coupled with the ridges 35 b of the primary portion 31.
• the secondary portion 32 comprises a first connecting surface 22 forming a 45 degree angle with respect to the longitudinal direction X' of the primary portion 31.
• the first connecting surface 22 is configured to be at least partially connected to a second connecting surface 23 of the second profile 2.
• the secondary portion 32 comprises a first connecting surface 22 forming a 45 degree angle with respect to the longitudinal direction X' of the primary portion 31.
• the first connecting surface 22 is configured to be at least partially connected to a second connecting surface 23 of the second profile 2.
• the first connecting surface 22 comprises a connecting area 24, which is configured to be welded to a second connecting surface 23 defined by the front ends of walls 25 delimiting hollow chambers 26 inside the second profile 2.
• the connecting area 24 mirrors the second connecting surface 23.
• the connecting area 24 has substantially a horseshoe shape.
• the solution for joining dissimilar profiles is at least as strong as a welded corner with two sashes.
• the disclosed solution provides an increased weld contact area, which improves angular and torsional rigidity with respect to a cap of the state of the art connected by a screw.
• the secondary portion 32 comprises a first transverse protrusion 34 a which is configured to abut against an abutment surface 14 of the first profile 1 and to form a continuous surface with an outer surface 15 of the first profile 1 when the primary portion 31 is inserted in the cavity 4 of the first profile 1.
• the first transverse protrusion 34 a extends longitudinally along the longitudinal direction Y'.
• the first transverse protrusion 34 a is connected to the first connecting surface 22.
• the first transverse protrusion 34 a forms a continuous surface with an outer surface 16 of the second profile 2, as visible from Figure 1 .
• the secondary portion 32 comprises a second transverse portion 34 b, extending along the direction Z. More preferably, the second transverse portion 34 b f aces one of first couple of sides 39 a of the primary portion 31.
• the second transverse portion 34 b is configured to abut against the wall 43 of the first profile at the first connection end 11.
• the second transverse portion 34 b is a snap fitted to the wall 43 at the first connection end 11.
• a window system 5 comprises a first profile 1, a second profile 2 and a corner piece 3.
• the corner piece 3 is configured to connect the first profile 1 to the second profile 2 in a miter joint 6.

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• Engineering & Computer Science (AREA)
• Civil Engineering (AREA)
• Structural Engineering (AREA)
• Joining Of Corner Units Of Frames Or Wings (AREA)

Priority Applications (1)

Applications Claiming Priority (1)

Publications (1)

Family

ID=90365148

Family Applications (1)

Country Status (1)

Citations (4)

• 2024
  • 2024-03-12 EP EP24163087.0A patent/EP4617469A1/de active Pending

Patent Citations (4)

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