DE3724253A1 - Heat-insulating composite profile - Google Patents

Abstract

The invention relates to a heat-insulating composite profile, a process for the production thereof, and a punching/bending tool used in the production process. The composite profile (1) is made up of two spaced-apart metal profile bars (4, 4') which are parallel in the profile longitudinal direction (2) and have in each case at least one groove (6) running continuously in the profile longitudinal direction (2), and at least one cross-sectionally essentially U-shaped insulating profile (5) which connects the profile bars (4, 4'). The U-base web (10) of said insulating profile spans the separating joint (3) between the profile bars (4, 4'). Each of the U-leg webs (12) engages into the groove openings (7) of the profile bars (4, 4') and is embedded in a positively locking manner in the grooves (6), by means of the application of ultrasound. The grooves (6) of the profile bars (4) are undercut beneath the groove openings (7) and thus form groove webs (16) which flank the groove openings (7). In order to form a plurality of barb-like protrusions (22) effective in the profile longitudinal direction (2), the groove webs (16) are bent off in the direction of the groove base (21), such that they project into the undercut regions (23) of the profile-bar grooves (6). The U-leg webs (12) of the insulating profile (5) are also embedded in a positively locking manner into the undercut regions (23) of the profile-bar grooves (6) by means of the application of ultrasound, such that they engage behind the groove webs (16) with their barb-like protrusions (22). <IMAGE>

Description

The invention relates to a heat-insulating composite profile for door frames, window frames or the like with the im The preamble of claim 1 features specified.

Such a profile is for example from DE-PS 27 44 553 known. Two parallel in the longitudinal direction of the profile and spaced apart by a parting line arranged metal profile bars are by two U-shaped Insulation profiles made of glass fiber reinforced plastic material connected, the U-leg through Ultrasound exposure embedded in grooves in engage the metal profile bars. Any insulation profile is made up of a number of insulation web profiles formed, which face in the longitudinal direction Overlap front ends and there through Ultra sound welding are connected. The profile bar grooves are effective against the flanks of the U-legs, provided uneven longitudinal cross undercuts, thus the positive connection between the insulation profiles and the profile bars is additionally stabilized. Because the undercuts are only shallow have, is the achievable stabilizing effect however only marginally. It has been found that especially the shear strength of the individual Components of the composite profile insufficient to each other and is therefore in need of improvement.

Composite profiles have the same disadvantage, at which the connection between the profile bars and the insulation profiles through purely mechanical bending embedding will be produced. In this, for example in  DE-PS 28 26 783 connection shown a laterally projecting groove side wall, the one has a flank provided with a tooth profile, mechanically into one that acts on the insulation profile Closed position bent.

The invention has for its object a composite to create a profile that has a high shear strength the profile bars and insulation profiles to each other in profile has longitudinal direction.

The solution to this problem is in the characteristic Features of claim 1 specified. Through the Undercuts in the grooves of the profile bars below of the slot openings and the thereby formed, the Groove flanks flanking slot openings are in the transverse direction acting undercut areas compared state of the art much larger dimensions created. Barb-like projections protrude into these undercut areas due to the turn the groove webs into the groove base. Through the Embedding the U-leg webs of the insulation profile using Ultrasound exposure in this back the projections act as Shift locks against a longitudinal shift of Insulation profile and profile bar to each other. Shifts of the two profile bars perpendicular to their parting plane are caused by the engagement of the U-leg webs Insulation profiles prevented in the slot openings. The Form-fit of the U-leg webs with the rear cutting areas under the groove bars makes a Parallel displacement of the two profile bars in the Joint plane perpendicular to the longitudinal direction of the profile impossible. Through the configuration according to the invention of the composite profile are relative shifts of Subcomponents of the composite profile in all  Space directions reliably blocked. The composite profile is exceptionally stable, so especially very torsion and bending resistant as well as true to size in the manufacture of a door frame, window frame or the like.

The sub-claims 2 to 9 characterize advantageous Refinements and developments of the Invention according composite profile.

Due to the configuration according to claim 2 Grooves a cross-sectional profile according to the type of longitudinal guidance a sliding block with undercuts on both sides. This groove shape is advantageous for improvement of stability and that described below Formation of the undercut areas engaging projections of the groove webs.

Claims 3 and 4 describe further developments the groove shape, which ensures high stability of the connection between the profile bars and the insulation profiles guaranteed, but at the same time very constructively is simple. The specified groove shape with its partial webs is also through a single editing process (see claim 10) can be produced.

By the characterizing feature of claim 5 the longitudinal stability and shear strength of the Composite profile further improved. By in Point the longitudinal direction of the profile bar, the entire Cross-sectional area of the undercut, End faces of the bent partial web ends exist after the ultrasound exposure of the insulation profile the undercut embedding the U-leg webs areas from individual, in the longitudinal direction of the profile separate, pocket-like cavities.  

These include those in it by ultrasound applied sections of the U-legs bridges form-fitting, making a particularly intimate Contact between the insulation profiles and the profile bars is created.

According to claims 6 and 7 are between the bent partial webs straight partial webs from the Groove side walls. Through the straight dividers are longer, compared to those of the curved part webs formed cavities of larger volume undercut areas created a more stable connection of the profile bar with the insulation profile in directions parallel to the parting line and perpendicular to the profile achieve longitudinal direction. The specified in claim 7 Sequence of two repeating each other bent part webs and a straight part web puts a favorable compromise between Stability in the longitudinal direction of the profile and across to this.

By the on the back of the U-base web of the Guide grooves molded into the insulation profile become one manufacturing simplification achieved because with it the sonotrodes of the ultrasound application device while embedding the insulation profile in the grooves the profile bars in their target position in profile lengthways direction.

By designing according to the characteristic Features of claim 9 is reliable and complete filling of the cavities between the projections of the profile rod grooves through the material the U-leg webs ensures. By the additional mechanical loading of the insulation profile the sonotrodes of the ultrasound application device  and the resulting introduction of Ver deepening in the flat groove bottom of the guide grooving takes place under the recess of the material softened by ultrasound the U-leg webs. For the excess material the voids stand between those in the undercut protrusions protruding into the space available. The material of the U-leg webs is literally pressed into these cavities, creating a complete mold filling and an intimate Non-positive connection between the U-leg webs and the profile rod is achieved.

In claims 10 to 14 is a method for Production of a composite profile from extruded Profile bars or insulation profiles and advantageous Refinements thereof specified. That in claim 10 specified method is characterized by a low Number of individual, technically simple Procedural steps. In particular the division and bending of the groove webs of the profile rod grooves the curved partial webs is in a single step by means of one in claims 15 to 18 in more detail specified punching and bending tool can be carried out. The further process steps are individually for known per se in the manufacture of composite profiles, they can be automatic and therefore particularly efficient be performed. It should be noted that the division and bending of the groove webs by means of of the punching and bending tool in the same holding device can be done in which the profile bars for attachment the insulation profiles are inserted or tensioned.

Claims 11 and 12 identify alternative ones Possibilities for ultrasound exposure of the insulation profile. The continuous route  a sonotrode of the ultrasound application device the insulation profile is from the state of the art itself known, but brings the application of the insulation profiles only in the area of the guide groove Advantage of a much higher area-specific Ultrasound performance with it. The ultrasound will namely only transferred to the insulation profile there, where it is really needed, namely in the area the U-leg webs. In addition, the quasi brings selective ultrasound exposure of the insulation profile only on short partial lengths of the insulation profile (Claim 12) the advantage that between the insulation areas in the exposed areas remains in the target cross section, so that none Cross-sectional weakenings occur and its transverse strength is retained.

By designing the method according to the invention according to claim 13, the manufacturing time for a Composite profile drastically reduced. The insulation profile is namely in the form-fitting areas of the U-legs webs with the dividers from one at the same time corresponding number of linearly aligned, according to the distance between the interlocking areas arranged single sonotrodes in the guide grooves acted upon. The sonotrodes are therefore according to Art a comb arranged above the insulation profiles, the positive connection is made by one time Applying the insulation profiles through the sonotrode comb. Are two such sonotrode combs in parallel accordingly the distance between the two guide grooves on the back arranged the insulation profile, so the complete Connection between two profile bars using a Insulation profile in one operation through simultaneous Ultrasound exposure of the two U-leg webs of the insulation profile.  

According to claim 14, the individual sonotrodes the ultrasound exposure to the insulation profile additionally mechanically in the bottom of the guide grooves pressed in. This will fill the mold the voids between the protrusions in the back cutting areas of the profile rod grooves through the Material of the U-leg webs with the described Benefits achieved. In addition, the Dimensional accuracy of the component parts of the composite profile improved to each other. The in their target position to each other profile bars inserted into the holding device are applied by means of the sonotrodes namely mechanically against the target position of the profile bars defining counter surfaces of the Holding device pressed.

In claims 15 to 18 is a punch-bend pre Direction for reshaping the ribs of the profile rod grooves specified in the curved or straight partial webs. This essentially consists of a sickle wheel, its peripheral surface as characterized in claim 15 is trained. When dividing and bending the Groove bars of the profile bar grooves to the partial bars is the Sickrad with its peripheral surface on the tops of the groove webs facing away from the base of the groove put on and on this under pressure unrolled towards the bottom of the groove. The cross direction of the profile bars running the cutting edges of the parallel Pierce cutting wedges arranged to the roll axis the groove webs during the rolling motion. The cutting wedges bend the end regions of the partial webs thus formed towards the bottom of the groove. So it’s enough Sickrad once over the profile bar groove to achieve their shape.  

By designing the sickle wheel according to claim 16 becomes the circular arc shape specified in claim 4 the partial webs achieved.

Straight, non-bent part webs remain between two successive cutting wedges existing, on the right parallel to the plane of the roll stand corner-shaped recess (claim 17).

By designing the peripheral surface of the sickle wheel according to claim 18 is that specified in claim 7 Sequence of two bent part bridges and a straight web on the profile bar groove achieved.

Using the attached figures, this is fiction according composite profile, the process for its manufacture position and that as a punching and bending tool used Sickrad in one embodiment explained in more detail. Show it:

Fig. 1 is a fragmentary, perspective Dar position of the profile bar,

Fig. 2 is a perspective view of the insulation profile,

Fig. 3 is a partial cross section of the composite section along the line III-III in Fig. 4,

Fig. 4 is a partial, perspective Dar position of the composite profile and

Fig. 5 is a schematic side view of the sickle wheel of the punch-bending device for the grooves of the profile bars.

The composite profile 1 partially shown in FIGS . 3 and 4 is composed of two profile bars 4 spaced apart from one another in the longitudinal direction 2 of the profile parallel to one another by a parting line 3 and two connecting cross-sectionally approximately U-shaped insulating profiles 5 .

The profile bars 4 are extruded aluminum parts, the rough cross-sectional shape of which depends on the intended use and the mounting in the frame. In Fig. 3, for example, a profile rod 4 is shown, which is essentially designed as a rectangular hollow rod.

Essential for the connection of the profile bars 4 by means of the two insulating profiles 5 , 5 'are the continuous in the profile longitudinal direction 2 grooves 6 , the two on the profile bar 4 according to FIG. 3 with mutually facing groove openings 7 are arranged in the corner regions of the rod. The central longitudinal plane 8 of the grooves 6 runs parallel to the parting plane 9 , which is formed by the mirror-image arrangement of the second profile bar 4 'parallel to the profile bar 4 .

The two profile bars 4 , 4 'connecting insulating profiles 5 , 5 ' along their entire length are essentially U-shaped in cross section. Your U-base web 10 bridges the parting line 3 between the profile bars 4 , 4 '. The short U-leg webs 12 of the insulating profiles 5 , 5 'face each other ( Fig. 3) and engage from above or below in the groove openings 7 of the grooves 6 of the profile bars 4 , 4 '. On the U-legs webs 12 rear side 13 facing away from each insulating section 5, 5 extending in the longitudinally axial overlap with the U-limb webs 12 guide groove 14 is respectively formed with a trapezoidal cross-section. The side edges 15 of the U base web 10 , which run parallel to the longitudinal direction 2 of the profile, project laterally beyond the U leg webs 12 .

As is shown in FIGS. 1 and 3, the grooves 6 of the profile bars 4 are undercut below the groove openings 7 and thereby form the groove webs 16 flanking the groove openings 7 . The grooves thus have a T-shaped cross-section, the T-vertical legs extending from the mutually applied groove openings 7 . Each groove web 16 is separated in the longitudinal direction into a plurality of partial webs 17 , each of which integrally merges into the associated groove side wall 19 in its central region 18 . The end regions 20 of the partial webs 17 pointing in the longitudinal direction 2 of the profile are bent toward the groove base 21 . They thus form the barb-like projections 22 effective in the longitudinal direction 2 of the profile, which protrude into the undercut areas 23 of the grooves 6 . The bottom of the groove can be flat (FIGS . 1, 4) or provided with oblique side flanks ( FIG. 3).

As can be clearly seen in FIG. 1, the partial webs 17 are bent in the shape of a circular arc, the end faces 24 of the bent partial web end regions 20, which essentially face in the longitudinal direction 2 of the profile, occupy the entire cross-sectional area of the undercut regions 23 . Along the groove 6 , two pairs of bent sections 17 alternate with a pair of straight, integral over their entire length with the groove sides walls 19 connected webs 17 '.

Referring to Figs. 3 and 4, the inventive method for producing the composite profile 1 will be explained in the following.

It is assumed that two extruded insulating profiles 5 , 5 'or extruded profile bars 4 , 4 '. The latter still have intact groove webs 16 . In a first manufacturing step, the groove webs 16 are separated into the partial webs 17 , 17 'by means of a stamping and bending tool and bent accordingly. Then the two profiled bars 4 , 4 'machined in this way are inserted into one another (not shown) in the final mounting position. Then the insulation profiles 5 , 5 'are inserted with their U-leg webs 12 into the slot openings 7 of the profile bars 4 (see Fig. 3, insulation profile 5 in the slot opening 7 of the right profile bar 4 ').

The positive connection between the insulating profiles 5 , 5 'and the two profile bars 4 , 4 ' is in each case carried out by ultrasound exposure of the U-leg webs 12th From the rear 13 of the U base web 10, the individual sonotrodes 25 of the ultrasound application device in the guide grooves 14 act on the insulation profile 5 in the undercut areas 23 between the projections 22 . The material of the U-leg webs 12 thus softens in these areas. Since at the same time the individual sonotrodes 25 are mechanically pressed into the insulating profile 5 to form the depressions 26 in the groove base 27 , the excess material of the U-leg webs 12 flows through the displacement effect in a form-fitting manner into the undercut areas 23 of the profile rod grooves 6 . After cooling the U-leg webs 12 insulation profile 5 , 5 'and profile bars 4 , 4 ' positively and forcefully connected.

It should be pointed out that the individual sonotrodes 25 are arranged at a distance from one another which corresponds to the distance between two central regions 18 of the partial webs 17 . The individual sonotrodes 25 are also pressed into the insulation profile 5 in the longitudinal positions of these central regions 18 .

In Fig. 5 the Sickrad 28 is shown schematically in side view. This can be used as a stamping and bending tool for reshaping the groove webs 16 of the profile rod grooves 6 into the curved or straight partial webs 17 , 17 '. The peripheral surface 29 of the trickle wheel 28 serves as a molding surface. It is unrolled in the processing of section bars 4, 4 'on the groove bottom 21 facing away from top 29 of the Nutstege 16 under pressurization of Nutstege 16 in the direction of groove bottom 21st The peripheral surface 29 has a plurality of radially projecting cutting wedges 31 with cutting edges 33 arranged parallel to the rolling axis 32 . Their length corresponds to the total width 34 of the groove 6 . Your distance 35 in the circumferential direction defines the length of the partial webs 17 , 17 'of the profile bars 4 , 4 '.

Two successive cutting wedges 31 each form a bending surface 36 between them, which is curved concavely in a circular shape around an axis parallel to the roll axis 32 . As an alternative to this, two successive cutting wedges 31 can also form a recess 37 which is rectangular in section parallel to the roller plane. Repeatedly, two bending surfaces 36 and a rectangular recess 37 are arranged on the seeding wheel 28 between two cutting wedges 31 . If the sickle wheel 28 is rolled off as described on the upper sides 30 of the groove webs 16 , the shape of the partial webs 17 , 17 'of the groove 6 shown in FIG. 1 is achieved. As the depth of penetration of the cutting edges 33 into the groove webs 27 , the latter are pierced, the end regions 20 of the partial webs 17 being sheared off from the groove side walls 19 and bent in the shape of an arc in the direction of the groove base 21 . In the case of the rectangular recesses 37 , the groove web 16 is only pierced, the shearing off of the end regions 20 and the inward bending are eliminated.

Reference symbol list:

1 composite profile
2 Profile longitudinal direction
3 parting line
4, 4 ′ profile bar
5, 5 ′ insulation profile
6 groove
7 slot opening
8 median longitudinal plane
9 joint level
10 U base bridge
12 U-leg bridge
13 back
14 guide groove
15 side edge
16 groove web
17, 17 ' partial web
18 center area
19 groove side wall
20 end region
21 groove base
22 head start
23 undercut area
24 end face
25 single sonotrode
26 deepening
27 groove base
28 Sickrad
29 peripheral surface
30 top
31 cutting wedge
32 roll axis
33 cutting edge
34 total width
35 distance
36 bending surface
37 recess

Claims (19)

1. Heat-insulating composite profile for door frames, window frames or the like, composed of

• - Two in the profile longitudinal direction ( 2 ) parallel and through a parting line ( 3 ) spaced from each other metal profile bars ( 4 , 4 ') with at least one in the profile longitudinal direction ( 2 ) continuous groove ( 6 ), the central longitudinal plane ( 8 ) each parallel to the joint level ( 9 ) and
• - At least one connecting the profile bars ( 4 , 4 '), in cross-section substantially U-shaped insulating profile ( 5 ) made of plastic material, the
  • - U-base web ( 10 ) bridges the parting line ( 3 ) between the profile bars ( 4, 4 ' ) over the entire length of the composite profile ( 1 ) and
  • - U-leg webs ( 12 ) each engage in the slot openings ( 7 ) of the profiled bars ( 4, 4 ' ) and are embedded in the slots ( 6 ) essentially in a form-fitting manner by ultrasound exposure,

characterized by the following features:

• - The grooves ( 6 ) of the profile bars ( 4 , 4 ') are undercut below the groove openings ( 7 ) and thereby form the groove openings ( 7 ) flanking groove webs ( 16 ),
• - The groove webs ( 16 ) are to form a plurality of profile longitudinal direction ( 2 ) effective, barb-like projections ( 22 ) in the undercut areas ( 23 ) of the profile rod grooves (6) in the direction of the groove base ( 21 ) and bent
• - The U-leg webs ( 12 ) of the insulation profile ( 5 ), the groove webs ( 16 ) with their barb-like projections ( 22 ) are positively embedded in the undercut areas ( 23 ) of the profile rod grooves ( 6 ) by means of ultrasound exposure.

2. Composite profile according to claim 1, characterized in that the profile rod grooves ( 6 ) each have the shape of approximately a T with outgoing from the groove openings ( 7 ) T vertical legs. 3. Composite profile according to claim 1 or 2, characterized in that each groove web ( 16 ) in the longitudinal direction of the profile ( 2 ) is separated into a plurality of partial webs ( 17 ), each

• - Go in one piece in the middle into the associated groove side wall ( 19 ) and
• - With their end regions ( 20 ) pointing in the longitudinal direction of the profile ( 2 ) to form the projections ( 22 ) towards the groove base ( 21 ).

4. Composite profile according to claim 3, characterized in that the partial webs ( 17 ) are bent approximately in a circular arc, the U-leg webs ( 12 ) by means of ultrasound exposure to the groove base ( 21 ) and the partial webs ( 17 ) in the region of their concave curvature between the circular arc ends (end regions 20) formed undercut regions ( 23 ) engage. 5. Composite profile according to claim 3 or 4, characterized in that the substantially in the longitudinal direction ( 2 ) facing end faces ( 24 ) of the bent partial web end areas ( 20 ) the entire cross-sectional area of the groove base ( 21 ) and the partial webs ( 17 ) formed undercut areas Take ( 23 ). 6. Composite profile according to one of claims 3 to 5, characterized in that between the bent part webs ( 17 ) straight part webs ( 17 ') protrude from the groove side walls ( 19 ). 7. Composite profile according to claim 6, characterized in that two bent partial webs ( 17 ) and a straight partial web ( 17 ') are repeated one after the other. 8. Composite profile according to one of the preceding claims, characterized in that on the U-leg webs ( 12 ) facing away from the back ( 13 ) of the U-base web ( 10 ) of the insulation profile ( 5 ) in each case in the longitudinal direction parallel overlap with the U-leg webs ( 12 ) extending guide grooves ( 14 ) for the sonotrodes (single sonotrodes 25 ) of an ultrasound application device are formed. 9. Composite profile according to claim 8, characterized in that by means of additional mechanical pressurization by the sonotrodes (single sonotrodes 25 ) of the ultrasound application device, spaced-apart depressions ( 26 ) in the flat groove base ( 27 ) of the guide grooves ( 14 ) in longitudinal overlap with the positive locking areas the U-leg webs ( 12 ) with the partial webs ( 17 , 17 ') of the profile rod grooves ( 6 ) are introduced. 10. A method for producing a composite profile ( 1 ) from extruded, with corresponding grooves ( 6 ) or webs ( 12 ) provided profile bars ( 4 , 4 ') or insulating profiles ( 5 , 5 ') according to one of the preceding claims with the following method steps :

• - Division and bending of the groove webs ( 16 ) of the profile rod grooves ( 6 ) to the curved or straight partial webs ( 17 , 17 ') by means of a stamping and bending tool (sickle wheel 28 ),
• - Inserting two profiled bars ( 5 , 5 ′) machined in this way into the mounting desired position relative to one another in a holding device
• - Inserting the insulation profiles ( 5 , 5 ') with their U-leg webs ( 12 ) in the groove openings ( 7 ) of the profile bars ( 4 , 4 '),
• - Ultrasound exposure of the U-leg webs ( 12 ) of the insulating profiles ( 5 , 5 ') from the rear ( 13 ) of the U-base web ( 10 ) by means of one or more sonotrodes (individual sonotrodes 25 ) such that the material of the U-leg webs ( 12 ) between the projections ( 22 ) formed by the part webs ( 17 , 17 ') of the groove webs and for the form-fitting embedding of the U-leg webs ( 12 ) in the undercut areas ( 23 ) between the groove base ( 21 ) and the part webs ( 17 , 17 ′) flows.

11. The method according to claim 10, characterized in that for the ultrasonic application of the insulation profile ( 5 , 5 '), a sonotrode is guided continuously along the guide grooves ( 14 ) of the U-base webs ( 10 ). 12. The method according to claim 10, characterized in that the insulating profiles ( 5 , 5 ') in the positive locking areas of the U-leg webs ( 12 ) with the part webs ( 17 , 17 ') of the profile bars ( 5 , 5 ') each short partial lengths in the guide grooves ( 14 ) are acted upon by a single sonotrode ( 25 ) ultrasound. 13. The method according to claim 12, characterized in that the insulating profiles ( 5 , 5 ') in the positive locking areas of the U-leg webs ( 12 ) with the part webs ( 17 , 17 ') simultaneously from a plurality of linearly spaced, spaced individual sonotrodes ( 25 ) in the guide grooves ( 14 ). 14. The method according to any one of claims 11 to 13, characterized in that the individual sonotrodes ( 25 ) in the ultrasonic application of the insulation profiles ( 5 , 5 ') are additionally mechanically pressed into the bottom of the guide grooves ( 14 ) in such a way that at the same time the depressions ( 26 ) are formed in the groove base ( 27 ). 15. punch-bending device for reshaping the groove webs of the profile rod grooves into curved or straight partial webs, characterized by a sickle wheel ( 28 ) as a punch-bending tool, the peripheral surface ( 29 )

• - the Nutstege (16) rolls as the forming surface on the groove base (21) upper sides facing away from (30) under pressurization of Nutstege (16) towards the groove base (21) and
• - A plurality of radially projecting cutting wedges ( 31 ) with cutting edges ( 33 ) arranged parallel to the roll axis ( 32 ),
  • - Which each have a length corresponding to the total width ( 34 ) of the groove ( 6 ) and
  • - The distance ( 35 ) in the circumferential direction determines the length of the partial webs ( 17, 17 ' ) of the profile bars ( 4, 4' ).

16. The apparatus according to claim 15, characterized in that two successive cutting wedges ( 31 ) form a concave curved bending surface ( 36 ) between them about an axis parallel to the roll axis ( 32 ). 17. The apparatus according to claim 15, characterized in that two successive cutting wedges ( 31 ) between them form a rectangular section ( 37 ) parallel to the roller plane. 18. The apparatus according to claim 15 and 16, characterized in that two bending surfaces ( 36 ) and a recess ( 37 ) between two cutting edges ( 33 ) follow each other repeatedly.