WO1999027220A1

WO1999027220A1 - Procedure for manufacturing two-elements profiles for window and door frames using an independent profile to retain resin

Info

Publication number: WO1999027220A1
Application number: PCT/IT1998/000342
Authority: WO
Inventors: Bruno Candusso
Original assignee: Strato S.R.L.
Priority date: 1997-11-26
Filing date: 1998-11-26
Publication date: 1999-06-03
Also published as: IT1298049B1; AU1577299A; ITTS970010A1

Abstract

The invention can be validly employed in the field of thermally cut, two-element window and door frame manufacturing. The procedure consists of following steps: a rubber profile (3) is matched into a guide (1.4) of a metal profile (1) so that the first one is positioned in correspondence with the lower edge of metal profile (1); the two elements are moved longitudinally towards along a factory continuous processing lane so that said elements are positioned like a rectangular trapeze and are pressed one against the other in correspondence with rubber profile (3); bonding liquid resin (4) is then filled into or injected into the channel existing between the two elements; the rubber profile (3) works as a retaining element for the resin (4) itself; then other devices located on the factory continuous processing lane tip one of the two elements and they keep on pressing them energetically one against the other until the second element is perfectly parallel to metal framing profile (1) while resin (4) is polymerised or hardened.

Description

Procedure for manufacturing two-elements profiles for window and door frames using an indipendent profile to retain resin.

Technical Field The invention can be validly employed in the field of window and door frames. It consists of moving a metal framing profile forwards next to a wooden profile and filling the channel located in-between with bonding resin. The bottom of such a channel is made up of an independent rubber profile. The technique of joining aluminium profiles with wooden profiles destined to form window and door frames has been known since long. The metal profile makes up the outer part of window and door frame, whereas the inner part is made of wood. Profiles thus assembled are called "two-elements" framing profiles. Therefore weather resistance and waterproof properties of aluminium are exploited, as well as the beauty and thermal insulation properties of wood. Metal is fixed to wood by means of a bonding resin which is filled into the gap existing between the materials themselves. More particularly, the metal profile is moved forward longitudinally along a factory continuous processing lane and is sided with the wooden profile; the two items are pressed one against the other. The metal profile has, in the cross section, a longitudinal spacing-retaining wing which is placed on the basis edge on the side of joint with the wooden profile so as to carry out a double function of constant, fixed spacer for the wooden profile from the metal profile and to work as a retainer for the filled into, bonding resin. Thus, a blind-bed channel is being formed where resin is injected. Projections of metal profile and slits made into wood enable resin to widen the bearing surface and thereby to increase cohesion between the two materials. Said wing is obtained at the free end protruding sharply and can be removed after polymerisation and hardening of resin. Such wood-metal coupling system is extremely effective but the presence of the wing creates many problems.

First of all, its stiffness is not properly suitable for very small gaps that both wood and metal profile and, eventually, the machinery employed in joining procedure, have. Thus, an interstice, at the bottom of the channel, between the wing itself and the wooden wall, may be formed. Such a defect tends to amplify itself if the wooden surface in contact with resin is extremely rugged or if it has natural cavities and slits. Some liquid resin can percolate through such an interstice thus forming a film external to channel which must be then forcedly removed to allow for subsequent processing of two-elements profile.

Whenever such longitudinal wing is to be removed, it must undergo a milling operation. In both cases there is a great waste of time and a consequent increase of costs of production. On the contrary, if the wing is not removed, the latter, being in contact with wood, allows for the thermal exchange between aluminium and wood itself. Lastly, once the window or door assembly unit is made operational, the metal wing becomes a source of friction if, due to different thermal dilations of wood and of aluminium, the wood/resin unit tends to slide along aluminium.

Disclosure of Invention

The aim of the present invention is to implement a procedure that enables to form two-elements profiles for window and door frames without being faced with the above listed problems. These as well as other aims are achieved by the procedure of thermally cut window and door frames with two-elements profiles as in object, wherein a metal profile is used and joined to a wooden profile or to another metal or non-metal profile by means of bonding resin. A longitudinal guide is formed into the surface of metal profile facing the wooden profile surface or that of other profiles. The guide houses the basal part of an independent profile made of rubber or other material with similar features whose apical tipped part is in contact with wood or other profile whose apical tipped part, as described above, is bound into the metal profile.

The metal profile is moved forwards longitudinally along a factory continuous processing lane in a parallel way and next to a wooden profile (or other metal or non-metal profile) so that they form the sides of a rectangular trapeze. The rubber profile is locked into the lower edge of metal profile, thereby occupying the position of the minor shelf of said trapeze. A blind-bed channel is then formed whose walls are made of, on one side, the metal profile, while on the other side, the wooden profile (or other profile) and the rubber profile below.

Liquid resin is then poured into the blind-bed channel, avoiding to fill the latter up to the top. Then, other devices located on the factory continuous processing lane tip the wooden profile for as much as it is perfectly parallel even transversally to the metal profile. The metal profile and the wooden profile (or the other profile) are strongly pressed one against the other as long as the resin is polymerised and hardened.

Such rubber profile works both as element for retainig the bonding resin and as spacer between the metal profile and the second item of the composite profile.

The procedure as in object enables to use any kind of metal profile as long as the latter is provided with a guide for housing the basal part of the rubber profile.

The latter has a sufficient softness degree in its cross direction to enable it to operate as a compensating item for the amount of gaps (in employed materials as well as machinery) and therefore to keep sufficient distance between the two elements of window and door frame without having losses of liquid resin and with consequent advantages that come from this. Therefore the rubber profile acts as a cross stabiliser for gaps. Its softness enables it, at the same time, to suit to diverse roughness and to possible defects that wood may have. Its apical tipped part, not causing friction, allows for a perfect sliding of the unit wood/resin or other material/resin along the metal profile once that the window and door frame is assembled and undergoes a thermal dilation. By avoiding to remove the rubber profile, the costs of production are reduced. However, even if remaining into its position and notwithstanding that it is both in contact with wood and with metal as it is made of insulating material, it acts as an anti-condensation thermal bridge.

During pouring and when bonding resin hardens, it acts as an hold oscillating balance allowing for the exact parallelism of the metal profile with wood profile (or with other material profile).

A Brief Description of the Drawings

Further features as well as advantages of invention will be better explained by the description of a form of embodiment, preferable but not exclusive, of the procedure for assembling of two-elements profiles for window and door frames as in object, illustrated for mere indicative and not restrictive purposes on enclosed drawings, in which:

- 1 shows a cross section of a window frame in which the used thermally cut "two-elements" profile is formed by the coupling of a metal profile with a wooden profile;

- figure 2 shows, magnified, the cross section of two said elements destined to form a composite profile; the wooden profile is illustrated in some of its different positions it may assume when being joined with the metal profile; - figure 3 shows the cross section of the same "two-elements" profile as by figure 2 once the joining of metal profile with wooden profile is over; such composite profile is used for the half unit of a window;

- figure 4 shows the cross section of the "two-elements" profile that makes up the post of window unit; - figure 5 shows in a more detailed way the cross section of rubber profile and its related guide on the metal profile.

Mode for Carrying Out the Invention

The procedure as in object enables to join a metal profile 1 to a wooden profile 2 to create thermally cut "two-elements" profiles for window units, wherein the metal profile 1 represents the outer portion of the frame, while its inner portion is made of wood.

On the edge of the surface of the metal profile 1 which will be opposed to one surface of wooden profile 2, there is a rib 1.1 or a wall 1.2. A second rib 1.3 is placed next to the primary rib 1.1 or wall 1.2. Said rib 1.1 and close rib 1.3 or wall 1.2 and close rib 1 .3 form a longitudinal guide 1.4 orientated orthogonally with respect to the surface of metal profile 1 and is positioned very close to the end of the surface itself.

Guide 1.4 is the housing wherein is inserted basal part 3.1 or foot of a rubber arrow-shaped profile 3, with apical tipped part 3.2 facing the wood. Said rib 1.3 and a second rib 1.5, resting on same surface, have a curved and almost parallel end to the surface of metal profile 1 itself. Such ribs 1 .3, 1.5, in conjunction with the latter, form some housings 1.6 in the longitudinal direction. On surface of wooden profile 2 that will be opposed to just described surface of metal profile 1 some longitudinal recesses 2.1 or indented portions 2.2 orientated obliquely with respect to wooden profile 2 surface, are made. Basal part 3.1 is lodged in metal profile 1 of rubber profile 3. Thereby the composite metal profile 1 - rubber profile 3 is moved forwards longitudinally along a factory continuous processing lane next to wooden profile 2 so that surface of metal profile 1 opposing wooden profile 2 is vertical and the opposed surface of wooden profile 2 forms an acute angle with metal profile 1 surface.

Wooden profile 2 is pressed against metal profile 1 but it cannot adhere to the latter since rubber profile 3, placed in correspondence with the lower edge of metal profile 1 , operates as a spacer. However, the material it is made of, enables it to adapt itself to gaps of metal profile 1 , wooden profile 2 and of devices operating along the factory continuous processing lane, thus allowing for the composite metal-wood profile to always have a constant thickness. A blind-bed channel is thereby formed which approximately looks like a rectangular trapeze, whose walls are made up of surface of metal profile 1 and opposing surface of wooden profile 2 whereas the bottom is made up of rubber profile 3. Bonding liquid resin 4 is then filled into a blind-bed channel. Rubber profile 3 acts as a retaining element for resin 4 itself.

Therefore other devices located along the factory continuous processing lane tip wooden profile 2 for as much as it becomes perfectly parallel with metal profile 1. During this operation apical tipped part 3.2 of rubber profile 3 works as a fulcrum or hold oscillating balance in-between the two components.

Metal profile 1 is pressed energetically against wooden profile 2 as long as resin 4 hardens. The housing 1.6 formed by ribs 1.3, 1.5 of metal profile 1 and recesses 2.1 or indented portions 2.2 of wooden profile 2 allow for sticking resin 4 to metal profile 1 as well as to wooden profile 2.

Claims

1 - Procedure for manufacturing two-elements profiles for window and door frames using an indipendent profile to retain resin, wherein a metal profile (1) which makes up the outer part of a window and door frame is joined to a wooden profile (2) or to another metal or other material profile that forms the outer part of a window and door frame, by means of bonding resin (4), characterised by the fact that it comprises the following steps: - a basal part (3) of an independent rubber profile (3) or non-rubber profile with similar features is matched into a guide (1.4) of a metal profile (1); the metal profile (1) is positioned in such a way that rubber profile (3) comes to be in correspondence with lower edge of surface of metal profile (1) facing the wooden profile (2) surface or other profile surface made of metal or other material; apical tipped part (3.2) of independent rubber profile (3) abuts into wooden profile (2) or into the other profile; said guide (1.4) has a longitudinal development and is placed orthogonally with respect to the surface of metal profile (1); said guide (1.4) is made up of two ribs (1.1 , 1.3) and of a rib (1.1) or a wall (1.2) insisting on the same surface of metal profile (1) opposing the surface of wooden profile (2) or the other profile; said rib (1.1) or wall (1.2) is positioned nearby the end of surface of metal profile (1); - when processing, the metal profile (1) is moved forwards longitudinally next to and parallel with the wooden profile (2) or other metal or other material profile along a continuous lane which is equipped with devices for continuously moving forwards the two elements to be joined in order that said two elements substantially form the sides of a rectangular trapeze; said metal profile (1) and said wooden profile (2) are pressed one against the other in correspondence with the position occupied by rubber profile (3), which is positioned at a lower level; wooden profile (2) or other metal or non- metal profile cannot adhere to metal profile (1) because rubber profile (3) works as a spacer; - bonding liquid resin (4) is thereby filled into or injected into the blind-bed channel whose walls are made of on one side by metal profile (1), on the other side of wooden profile (2) or other profile and at a lower level of rubber profile (3); rubber profile (3) works as retaining element for the resin (4) itself; - then other devices located on the factory continuous processing lane tip the wooden profile (2) or other profile for as much as wooden profile (2) or other profile is perfectly parallel even transversally to metal profile (1); wooden profile (2) or other profile is energetically pressed against metal profile (1) for as long as resin (4) is polymerised and hardened; during this stage apical tipped part (3.2) of rubber profile (3) works as a fulcrum or oscillating balance holding the two elements together. 2 - Procedure for manufacturing two-elements profiles, as in claims 1 , characterised by the fact that rubber profile (3) or other profile having similar characteristics is preferably shaped - in cross section - like an arrow point and can be ideally divided into three parts: a soft apical tipped part (3.2) which is in contact with wooden profile (2) or with second metal or other material profile, a body having a certain resistance to stresses thanks to its thickness and a basal part (3.1) or foot which is to be lodged into said longitudinal guide (1.4). 3 - A thermally cut, "two-elements" framing, as in claims 1 and 2, made of a metal profile (1) and a wooden profile (2) or other metal or non-metal profile, joined by means of a bonding resin (4), characterised by the fact that it has an independent rubber profile (3) which works as a spacer between the two elements and as a retaining element for the bonding resin (4) itself. 4 - Window and door frames formed by a thermally cut, "two-elements" framing, as in claims 1 , 2 and 3, where the profiles constituting them are made by a metal profile (1) and a wooden profile (2) or other metal or non- metal profile, joined by means of a bonding resin (4), characterised by the fact that it has an independent rubber profile (3) which works as a spacer between the two elements and as a retaining element for the bonding resin (4) itself.