SE544900C2

SE544900C2 - A method for increasing the glue areal and shear/breaking strength of an assembled element and a pre-assembled element

Info

Publication number: SE544900C2
Application number: SE2030147A
Authority: SE
Inventors: Henrik Palmu
Original assignee: Jackon As
Priority date: 2020-04-30
Filing date: 2020-04-30
Publication date: 2022-12-27
Also published as: SE2030147A1

Abstract

The disclosure relates to a method for increasing the glue areal (12,13) and shear strength of an assembled element (1,8), wherein the method comprises the following steps: providing a first element (3,) having on a proximal end (3') a recess form for receiving a proximal end (2') of a second element (2), applying a curable adhesive material in the contact area of one or both of the recess of the first element (3) and the area of the proximal end of the second element (2) intended for being received by the recess of the first element (3), bringing the proximal end (2') of the second element (2) into and in contact with the recess of the first element (3), and curing the adhesive material. The disclosure further relates to a preassembled element (1, 1').

Description

1 A method for increasing the glue areal and shearlbreaking strength of an assembled element and a pre-assembled element Technical field The present disclosure relates to a method for increasing the glue areal and shear- st-reng-thsheaqbreaking strength of an assembled element and a pre-assembled element of expanded or extruded polystyrene for the building industry. More specifically, the disclosure relates to a method for increasing the glue areal and shear[breal claim 1 and claim Background art Expanded polystyrene, EPS and extruded polystyrene, XPS, is used commonly to form building block in the building industry. The material has high isolation capability, it is light and it is easily formed to be adapted to a wide variety of requirements. lt is however a problem that the material brgakes easily. This is specifically a problem ifthe material is used in pre-formed shapes, such as for example L-form and U-form. Such elements are used for example in cold locations experiencing periods with ground frost. There is thus a need for extra isolation in the base of the wall, not only offering isolation in the wall, but also in the floor adjacent to the wall. When adding concrete to make the floor inside a building where such L- or U-form elements defines the perimeter of the building, the concrete will push with considerable force on the vertical inner part of the elements, and the pushing force is proportional to the depth of the concrete layer. lf the forces becomes too large the element will break, and this is a considerable problem since a breakage in the isolation will weaken the isolation capability of the wall. One example of this type of pre-shaped element is the Siroc@ L-shaped element of Jackon AS.

A lot of care has to be put into the building process to avoid such damages.

A further drawback of the L- U- and other forms elements is that they are prone to be damaged in transport, and extreme care has to be exercised when transporting such elements.

Summary lt is an objective of the present disclosure to mitigate, alleviate or eliminate one or more of the above-identified deficiencies and disadvantages in the prior art and solve at least the above mentioned problem. lt is an objective of the present invention to solve the technical problem stated above. Although the Siroc® L-shaped and U-shaped elements of Jackon AS is used in the examples of this document, it is an aim for the invention to solve the same problem for any type of EPS or XPS elements, or similar elements made of other isolation building material. lt is a further objective of the present invention to provide a method for enforcing EPS and XPS and the like elements used for other purposes than building. Pre-formed elements for protection of shipped goods is one example, Box forms intended for carrying heavy goods is another example. Although the examples in this description highlight the use of the invention in building elements, it should be understood that the invention can be used to enforce elements made for other intended use.

The invention is also directed to the manufacturing of improved performance building materials, specifically building materials of materials such as EPS and XPS and the like.

The present invention comprises a method for enforcing a building element made of EPS, XPS or similar material. lt is further an objective for the present invention to provide a simple and low resource demanding method for achieving an increased strength in such building elements. lt is further an objective of the present invention to allow usage of lower density EPS and XPS or the like elements due to the enforcement added to the elements as defined by the present invention According to a first aspect there is provided a method for increasing the glue areal and sheaqbreaking strength of an assembled element, wherein the method comprises the following steps: providing a first element having on a proximal end a recess form for receiving a proximal end of a second element, applying a curable adhesive material in the contact area of one or both of the recess of the first element and the area of the proximal end of the second element intended for being received by the recess of the first element, bringing the proximal end of the second element into and in contact with the recess of the first element, and curing the adhesive material. increased glue area will strengthen the binding between the two or more elements, and the ShearZbreal According to some embodiments, the recess form of the proximal end of the first element being cut or milled after the element is produced.

According to some embodiments, the recess form of the proximal end of the first element is adapted to the form of the proximal end of the second element.

Working with assembled element wherein one part is arranged substantially vertical relative a second part which is substantially horizontal, and the base form of the element part are substantially rectangular, a simple grinding of a recess in one proximal end of the vertical element will make a recess fitting to receive the proximal end of the horizontal element. Then the adhesive that is applied to one of the proximal element ends will be constituted of an increased area. The element, when the adhesive is cured, will thus be a lot stronger than if the adhesive area were limited by the area of the end surface of the proximal end of for example the vertical element part.

According to some embodiments, the method comprises the step: providing a- mir-rerrecess form on the proximal end of the second element for adapting to and increasing the contact area with the proximal end of the first element.

According to some embodiments the recess form of the proximal end of the first element is adapted to the mirror form of the proximal end ofthe second element, and the form is further provided in a form maximizing the contact area between the two elements.

To even further increase the glue area it may be advantageous to create a grinding recess in both elements that is to be merged together, recesses that is mirror shapes such that when the adhesive is applied and the elements are pressed together, the adhesive material area is increased and so is the strength of the connection.

According to some embodiments the first element is provided with an outer surface layer-4, and the recess form of the first element being partly defined by the inside of the surface layer, and partly by the proximal end of the first element.

According to some embodiments, the curable adhesive material is glue.

According to some embodiments, the curable adhesive material is hot melt glue or a polymer compound.

According to some embodiments, the elements are made of a building materiel of EPS or XPS or the like material.

According to some embodiments, the application of the curable adhesive material and the assembly of the elements are performed by a robot machine.

According to a second aspect there is provided a pre-assembled element, wherein the element comprising: a first and a second element fitted together in their respective proximal end, and a curable adhesive material layer, wherein the first element having on its proximal end a recess form for receiving the proximal end of a second element and for increasing the contact area with the proximal end of a second element, and the curable adhesive material layer is arranged between the two elements in the recess form for enforcement of the joint when the curing material has cured.

According to some embodiments, the second element having on its proximal end a mirror form for adapting to and for further increasing the contact area with the proximal end of the first element.

According to some embodiments, the first element having one or more further recesses in a form for receiving the proximal end of one or more further second elements.

According to some embodiments, the pre-assembled element is an L-, U-, or F-formed element, and the element is further a building materiel of EPS or XPS or the like material.

According to some embodiments, the pre-formed element is an L-, U-, or F-formed element and the element is elements combined to form a building element, carrier, container or box.

According to some embodiments, the first element comprise an outer surface layer, and the recess form of the first element being partly defined by the inside of the surface layer, and partly by the proximal end of the first element.

According to some embodiments, it is provided further recesses and protrusions in the respective proximal ends of the first and the second element, for increasing the area to which an adhesive can be applied in the connection between the two elements.

Effects and features of the second aspect are to a large extent analogous to those described above in connection with the first aspect. Embodiments mentioned in relation to the first aspect are largely compatible with the-the second aspect.

The present disclosure will become apparent from the detailed description given below. The detailed description and specific examples disclose preferred embodiments of the disclosure by way of illustration only.

Hence, it is to be understood that the herein disclosed disclosure is not limited to the particular component parts of the device described or steps of the methods described since such device and method may vary. lt is also to be understood that the terminology used herein is for purpose of describing particular embodiments only, and is not intended to be limiting. lt should be noted that, as used in the specification and the appended claim, the articles "a", "an", "the", and "said" are intended to mean that there are one or more of the elements unless the context explicitly dictates otherwise. Thus, for example, reference to "a unit" or "the unit" may include several devices, and the like. Furthermore, the words "comprising", "including", "containing" and similar wordings does not exclude other elements or steps.

Terminology The term "Recess" is to be interpreted as a form cut from an element, or a rom of increased glue surface for example comprised of a portion of an element and a portion of a front plate. EPS, XPS: Expanded polystyrene, EPS and extruded polystyrene, XPS, is used in this document, but shall also comprise other similar building materials typically used in forming building elements with high isolation capacity; examples are Polyisocyanurate lnsulation Materials, and Polyurethane lnsulation Materials.

Glue: Glue shall mean any type of glue, polymer, polyester resin, epoxy, vinylester, thermoplastic or other, applied in layer or mixed with a fiberglass component, comprising the ability to either harden and provide a solid enforcement of the material it is applied to by its own, or to fix and/or mix with a strip or spray of enforcement/armoring material when it is applied to surface (joint).

L- or U-formed element: L- or U-formed element is used as example shapes of the building elements in this application, but it shall also comprise other forms offering an inside corner or joint exposable to shear forces when used or transported. The forms may be produced from several parts forming joints when assembled in the final form, or they may be extruded/expanded into the final form in one piece.

The invention will now be described in more detail. Reference numbers referring to the same in the figures are included to make the understanding of the invention more readable. The protection scope of the invention is defined by the associated claims.

Brief descriptions of the drawings The above objects, as well as additional objects, features and advantages of the present disclosure, will be more fully appreciated by reference to the following illustrative and non-limiting detailed description of example embodiments of the present disclosure, when taken in conjunction with the accompanying drawings.

Figure 1A-F shows perspective figures of the assembled building element according to some embodiments of the present invention.

Figure 1G-H illustrates further connecting elements for expanding the adhesive area between the two elements Figure 2 shows an illustration pieture-of two building elements; the upper one according to present invention, and the bottom one representing prior art.

Figure 3 shows a perspective figure of the assembled building element according to a further embodiment of the present invention.

Figure 4 shows a perspective figure of the assembled building element according to a further embodiment of the present invention.

Figure 5 shows a perspective figure of the assembled building element according to a further embodiment of the present invention.

Figure 6 illustrates how building elements of present invention may be assembled and used for building a portion o f a ring wall.

Figure 7A-C illustrates how building elements of present invention may be assembled and used in the construction of buildings.

Detailed description The present disclosure will now be described with reference to the accompanying drawings, in which preferred example embodiments of the disclosure are shown. The disclosure may, however, be embodied in other forms and should not be construed as limited to the herein disclosed embodiments. The disclosed embodiments are provided to fully convey the scope of the disclosure to the skilled person.

Figure 1 - 7 illustrates how the pre-assembled element of present invention may be provided. Typically the EPS, XPS element is used when building in areas experiencing frost in the ground 10, examples are the Nordic countries where the winters are very cold, and the ground freezes solid in thetop soil level 11, typically the upper 0 - 1 m layer of the ground.

Typical embodiments are shown in figure 1A and 1B, wherein the elements having a horizontal leg 2 forming the basis for a layer of concrete 6, and a vertical leg 3 having an inside surface facing towards and coming in contact with the concrete 6 forming the floor inside the building. Figure 6 shows also a corner element 1' of an L-formed element. The illustrated elements may also comprise an optional outer surface layer 4, the outer surface layer 4 may be one or more of a concrete compound material, material forming a basis for applying a further layer or attaching further elements, material for temperature and/or damp isolation, or material and/or structure for the purpose of exhibiting a visual design, and the like.

The first aspect of this disclosure shows a method for increasing the glue areal 12,13 and sheaqbreaking strength of an assembled element 1,8, wherein the method comprises the following steps: providing a first element 3, having on a proximal end 3' a recess form for receiving a proximal end of a second element 2, applying a curable adhesive material in the contact area of one or both of the recess of the first element 3 and the area of the proximal end of the second element 2 intended for being received by the recess of the first element 3, bringing the proximal end of the second element 2 into and in contact with the recess of the first element 3, and curing the adhesive material.

By creating a much larger contact area between the two elements it is possible to make the corresponding glue area larger , and hence, a stronger binding between the two elements are provided, since a glued connection is considerably stronger than the element itself. ln a further aspect the recess form of the proximal end of the first and/or second elements 3 are being cut or milled after the elements are produced.

Producing process of EPS; XPS elements comprise extrusion material in a form. The simpler the form the faster the extrusion production process. lt is therefore desirable to produce simple forms, such as rectangular/square shaped forms, and if a special shape of an element is required this may later be cut/milled in a post extrusion process. However, if a complex pattern is required it may be advantageous to make an extrusion form defining the complex pattern. ln present invention there may be provided a variety of forms to increase the breaking strength of a combined element, such as exemplified in the figures 1A-1H, 3, 4 and 5. Other forms may be provided within the inventive concept of the present invention. ln a further aspect the recess form 3',4 of the proximal end of the first element 3 is adapted to the form of the proximal end of the second element The latter explains how the contact area between the two elements may be increased, and depending on which element is taking the largest strain when in use, different recess form 3',4 patterns may be advantageously be used. ln a further aspect a mirror form 2' on the proximal end of the second element 2 is provided for adapting to and increasing the contact area 12 with the proximal end of the first element 3 is necessary for optimizing the glued area strength. ln a further aspect the recess form 3',4 of the proximal end of the first element 3 is adapted to the mirror form 2' ofthe proximal end of the second element 2, and the form is further provided in a form maximizing the contact area 12 between the two elements.

The longer the profile line between the two elements can be made, the larger the contact area/glue area can be made. ln a further aspect the first element 3 is provided with an outer surface layer 4, and the recess 12 form of the first element 3 being partly defined by the inside of the surface layer 4, and partly by the proximal end 3' of the first element By including a surface layer 4 of any form, such as one or more of a concrete compound material, material forming a basis for applying a further layer or attaching further elements, material for temperature and/or damp isolation, or material and/or structure for the purpose of exhibiting a visual design, form the basis for portions of the recess form of element 3, the connection between the first element 3, the second element 2, and the surface (layer 4 may provide an even stronger binding, and the total shear/breaking strength of the assembled element may increase even further. ln a further aspect the curable adhesive material is glue. ln a further aspect the curable adhesive material is hot melt glue or a polymer compound.

In a further aspect the elements are made of a building materiel of EPS or XPS or the like material. ln a further aspect the application of the curable adhesive material and the assembly of the elements are performed by a robot machine.

The above embodiments refer to the first 3 and the second 2 element having recess and protrusions respectively. lt shall be understood that the present invention also comprise embodiments wherein the recess and protruding features are on the opposite elements. Such that the second 2 element having the recesses, and teh first 3 element having the proximal end form fitting in the recess of the second 2 element.

The second aspect of this disclosure shows a pre-assembled element 1,1',8, wherein the element comprising: a first 3 and a second 2 element fitted together in their respective proximal end, and a curable adhesive material layer, wherein the first element 3 having on its proximal end a recess form 3',4 for receiving the proximal end of a second element 2 and for increasing the contact area 12 with the proximal end of a second element 2, and the curable adhesive material layer is arranged between the two elements 3,2 in the recess form 3',4 for enforcement of the joint when the curing material has cured.

Present invention thus provides a fabricated element assembly, illustrated by example embodiments in figure 1A - 1H, ready to use that comprise a connection between the parts of the fabricated elements assembly which is sufficiently strong to resist strain in both transport and usage on for example a building site. The sheaqbreaking strength of the connecting area has increased due to the adhesive forming a much stronger binding than if an element should have been extruded in a similar shape, or as often seen in industry wherein the elements are glued to each other one element directly on another in one single glueline 19. This is shown in figure 2, where the pietureillustration show a side perspective of one embodiment of present invention (above) and one of prior art (below).

In a further aspect of this disclosure shows a pre-assembled element 1,1',8, wherein the second element 2 having on its proximal end a mirror form 2' for adapting to and for further increasing the contact area 12 with the proximal end of the first element Having a stepwise recess/protruding form, such as exemplified in for example figure lE, may be advantageous to provide an even further increased contact area wherein the adhesive can work. ln a further aspect of this disclosure shows a pre-assembled element 1,1',8, wherein the first element having one or more further recesses 13 in a form for receiving the proximal end of one or more further second elements As seen in figure 7B and 7C further vertical elements are provided with strong glued connections to the horizontal element. Other more complicated connected elements having more than 3 connecting member may be provided under the same inventive concept as described here. ln a further aspect of this disclosure shows a pre-assembled element 1,1',8, wherein the pre-assembled element is an L-, U-, or F-formed element, and the element is further a building materiel of EPS or XPS or the like material. ln a further aspect of this disclosure shows a pre-assembled element 1,1',8, wherein the pre-formed element is an L-, U-, or F-formed element and the element is elements combined to form a building element, carrier, container or box.

This is one such area wherein more elements are connected together in more complex forms. Extruded material such as EPS /XPS is used in cooling/heating transport lines, as protection crates, as light weight carrying devices and more. Endurance, reusability and strength are features that is advantageously affected by using the inventive concept of present invention. ln a further aspect of this disclosure shows a pre-assembled element 1,1',8, wherein the first element 3 comprise an outer surface layer 4, and the recess 12 form of the first element 3 being partly defined by the inside of the surface layer 4, and partly by the proximal end 3' of the first element Thus, by including an outer surface layer in the form expanding the adhesive layer area may provide a considerable larger glue area with less milling/pre-shaping of the elopement having the outer surface layer.ln a further aspect of the present invention it is provided a connection that further comprising further recesses 40'and protrusions 40 in the respective proximal ends 3', 2' of the first 3 and the second 2 element, for increasing the area to which an adhesive can be applied in the connection between the two elements.

Figure 1G and 1H shows two alternatives wherein protruding knots and corresponding recesses are formed in the connecting areas of the elements, but it should be understood that different number and shapes of such further connecting forms may vary, and may be combined with any of the above discussed area increasing features.

Using the element assembly is exemplified in figure 6 wherein a straight ground wall element and a ground corner element is shown, and in figure 7A and 7B a side view of two different embodiments (an L-, and an F- element) of the present invention is used in construction of a concrete base wall of a building. ln figure 7C the layout of several elements are laid down for later filling of concrete.

The person skilled in the art realizes that the present disclosure is not limited to the preferred embodiments described above. The person skilled in the art further realizes that modifications and variations are possible within the scope of the appended claims. Additionally, variations to the disclosed embodiments can be understood and effected by the skilled person in practicing the claimed disclosure, from a study of the drawings, the disclosure, and the appended claims. 12

Claims

Claims.

1. Method for increasing the glue areal (12,13) and shear/brgaking strength of an assembled element (1, 8) made of a building materiel of EPS or XPS, wherein the method Qgig c h a r a c t e r i z e d b y eemfarises-gmohrhnﬂsigwgthe following steps: providing a first vertical element (3) having on a proximal end (3') a recess form for receiving a proximal end (2') of a second horizontal element (2), applying a curable adhesive material in the contact area of one or both ofthe recess of the first element (3) and the area of the proximal end of the second element (2) intended for being received by the recess of the first element (3), bringing the proximal end (2') of the second element (2) into and in contact with the recess of the first element (3), and curing the adhesive material.

2. Method according to claim 1, wherein the recess form of the proximal end of the first and/or second elements (3, 2) are being cut or milled after the elements are produced.

3. Method according to claim 1, wherein the recess form of the proximal end of the first element (3) is adapted to the form of the proximal end of the second element (2).

4. Method according to claim 1, further comprising the step: providing a recess form on the proximal end of the second element for increasing the contact area (12) with the proximal end of the first element. Method according to any one of claim 1 to 551, wherein the first element (3) is provided with an outer surface layer (4), and the recess (12) form of the first element (3) being partly defined by the inside of the surface layer (4), and partly by the proximal end (3') of the first element (3). /ffšw _y_yy____vv_vMethod according to any one of the previous claims, wherein the curable adhesive material is hot melt glue or a polymer compound. šfiiš.äïëlmvwyMethod according to any one of the previous claims, wherein the application ofthe curable adhesive material and the assembly of the elements are performed by a robot machine. a first vertical (3) and a second horizontal (2) element fitted together in their respective proximal ends (3', 2'), and a curable adhesive material layer, wherein the pre-assembled element being characterized by the first element (3) having on its proximal end (3') a recess (12) form for receiving the proximal end (2') of a second element (2) and for increasing the contact area (12) with the proximal end of a second element (2), and the curable adhesive material layer is arranged between the two elements (3, 2) in the recess form (12) for enforcement of the joint when the curing material has cured, and wherein the elements are made of a building materiel of EPS or XPS. i Llífgjf, MPre-assembled element (1, 1', 8) according to claim ê-LLQ, wherein the second element (2) having on its proximal end (2') a recess form for further increasing the contact area (12) with the proximal end (3') of the first element (3). *i gugﬂmwPre-assembled element (1, 1', 8) according to claim â-l-ggor i-Zll, wherein the first element having one or more further recesses (13) in a form for receiving the proximal end of one or more further second elements (14). WPre-assembled element (1, 1', 8) according to any of the previous claims 11 to 13, wherein the pre- assembled element is an L-, U-, or F-formed element. : Pre-assembled element (1, 1', 8) according to claim 14, wherein pre-formed elements are L-, U-, or F- formed elements and the elements are combined to form one of a building element, carrier, container or box. ägg, Pre-assembled element (1, 1', 8) according to any ofthe previous claims 11 to 15, wherein the first element (3) comprise an outer surface layer (4), and the recess (12) form of the first element (3) being partly defined by the inside of the surface layer (4), and partly by the proximal end (3') ofthe first element (3). 'i Pre-assembled element (1, 1', 8) according to any of the previous claims 11 to 15, further comprising further recesses (40') and protrusions (40) in the respective proximal ends (3', 2') of the first (3) and the second (2) element, for increasing the area to which an adhesive can be applied in the connection between the two elements.