DE2757607A1 - Joining glass-fibre-reinforced, laminated, plastics components - by cutting back successive plies to form steps which fit steps cut in opposite laminate end, and lap joining free end of reinforcements - Google Patents

Abstract

To achieve a positive connection of (glass-fibre) -reinforced plastics laminated mouldings e.g. containers, pipe sections and fittings, the plies are successively cut back at the edges to be joined to form steps receding as viewed from a butt end of the inner plies. This stepping is effected so that the gaps between abutting ply ends increases in an outward direction. The length of each step is many times that of its weight. Reinforcing plies protruding from the ends of the plies overlap the abutting ends of the inner plies and are embedded in a lamina that fills the steps. Used for securely joining plastics laminated components e.g. tanks contg. corrosive substances, large-dia. pipeline sections. Process is relatively simple. Joints have substantial tensile strength whilst being only negligibly thicker than the components themselves.

Description

Non-positive connection of reinforced with reinforcement inserts

prepared laminated plastic components as well as processes for their production such components "The invention relates to a non-positive connection of laminated with reinforcement inserts, in particular glass fiber fabric, equipped Plastic components such as containers, pipe components or

Pipe sections, as well as a method for the production of components for such connections and containers made from such components.

There are laminated plastic components in particular for assemblable containers known, which with reinforcing inserts, such as glass fibers, for example glass fiber mats or the like. Are equipped. Such containers composed of plastic components especially if they are used for the storage of aggressive media, has very significant advantages over metallic containers.

In the known versions made of plastic with reinforcing inserts composite containers are generally part-cylindrical wall parts with Molded-on bottom and cover segments are provided, which are glued together - .. engesetzS and supported by ilalterings (OS 2 259 524).

It has also become known, with such containers or else Even with large-diameter pipelines, those made of glass fiber reinforced plastic to connect existing components in that the separation points of the stuinpf abut one another Components by subsequent lamination with plastics and stored therein Reinforcement inserts are bridged in a non-positive manner. The connecting laminate will executed as an overlapping adhesive connection. Through the inside of the container or the pressure in the pipeline is created between the components and shear stresses on the connecting laminate. Their permissible strength is largely of the processing and the care in the application of the amiats as well as depends on the width of the overlap of the laminate with the components.

Other connections of the components, such as by flanges and rivets held therein or by screw connections are either structural very expensive or not sufficiently safe or not suitable for the material.

It is the object of the present invention to provide a non-positive connection of the type specified in the introduction, to create the with simple Manufacture a safe and not only through the adhesive effect of the connecting laminate can transmit on the components bestilwte maximum tensile force, at the same time care should be taken that the wall thickness in the area of the junction of the Components do not experience any noticeable thickening compared to the other wall thicknesses.

The connection mentioned is characterized in order to solve the above problem in that the layers of the rounders to be connected to the components, from a joint starting from the inner layers, outwardly in opposite directions are so graded that the distance between the corresponding (hn ends of the layers increases towards the outside, The length of the individual steps is a multiple of the step height and protruding from the ends of the layers beyond the joint of the inner layers Reinforcement inserts provided and in a lamination filling the steps are embedded.

The new connection is also made by lamination, However, this is not intended to build on the wall of the structural elements, but causes the filling of the steps formed by the walls, with in this laminate made up of the ends of the individual layers over the joint of the Reinforcement layers protruding from the inner layers overlap each other and thus bridging the joint between the inner layers. This results in a particularly high tensile strength of the non-positive connection.

It is particularly useful when the over the joint of the inner Layers of reinforcing inserts protruding over the entire length the corresponding step of the other edge protrude and additional, each Reinforcing inserts are provided extending over the corresponding steps are. In this way, the load-bearing capacity of the joint is reduced by the tensile forces that occur especially large, as the overlapping ends of the reinforcement inserts are the longest possible Cover the area, with the additional reinforcement inputs provided when occurring Tensile forces can also take over part of these tensile forces.

It is particularly favorable if the components have an inner fine layer or a thermoplastic liner and a base laminate a few mm thick are equipped, and if the fine layer or the thermoplastic liner as well the base laminate as inner layers form a butt joint. This results in to a large extent on the inside of the components, also in the area of the joint smooth wall, regardless of the fact that, if necessary, in the area of the joint on the outside wall reinforcement is visible in the components.

The compounds described are created according to the invention expediently so that on the hands to be connected to the components during the Larllining from the inner to the outer layer formed and Reinforcement inserts protruding from the steps beyond the outermost edge of the components laminated will. A tear-off fabric can expediently be rolled up and in front of the steps removed after lamination of the areas between the steps. The laminated Reinforcement inserts should be as far as possible into the full wall of the components protrude so that there is a secure anchoring there and thus these reinforcement inserts allow large tensile forces to be transmitted.

When producing a container with a non-positive connection According to the present invention, it is recommended that the base ring parts and a base plate as well as shell-like partially cylindrical wall pieces initially via brackets with suction cups engaging the inner or fine layers in an overlapping position of the inner layers and after making a saw cut through the overlap zone of the inner layers in a butt joint and then line out the area between the levels. The brackets with the ones on the inside or fine layers attacking suction cups serve as an installation aid the completion of the frictional connection can be removed again. The bottom ring and the part-cylindrical wall parts can use steel rings Additional support during assembly and the oil container through a Dome roof to be closed.

The definition is explained below with the aid of the illustrative exemplary embodiments explained.

It shows: FIG. 1 in a schematic representation a longitudinal section by the edges of the component or components to be connected to one another before manufacture the connection, Fig. 2 is a longitudinal section through a connection of the edges, such as they are reproduced in FIG. 1, FIG. 3 shows a section in perspective a non-positive connection between two components during assembly, Fig. 4 shows a perspective view of an assembled from components according to the invention Container during the ion days.

In Figs. 1 and 2, the components to be connected 1 and 2 are as Laminated components reinforced with fiberglass fabrics are formed, with the layers this laminate are graded in the area of the mutually facing edges that the wall thickness of the joint 3 of the inner or lowest sclliclt with increasing Distance from this joint to i: imt. In the example shown, for each of the edges only shows two gradations, which are only schematic should show the multiple gradations envisaged in practice.

The individual stages are quite obvious from your example in FIG. 1 dimensioned so that the step length is a multiple of the respective step height. Here protrude from Fig. 1 reinforcement inserts for the individual steps 4 or 5 out which in the. the laminate forming the steps or the associated Layers embedded in a predetermined lung and sonnitin the laninat of the Components are anchored. The fiberglass fabrics 4 and 5 are dimensioned in their length so that they are beyond the joint 3; about the saved length of the corresponding step of the respective other edge of the component protrude and when the connection of the components according to FIG. 2 is completed in the area of the corresponding steps.

Fig. 1 shows that in the preparation of the connection, the lowest or inner layers 6, which are composed of a base laminate Ca and a fine layer or a thermoplastic liner 6b be available, initially in an overlapping position so that a saw cut along the later joint 3 a clean, stepped joint of these two layers is achieved. Fig. 1 also shows that on the individual steps of the component edges a tear-off fabric 7 is provided, which before the transfer of the respective corresponding reinforcing inserts 5 or 4 is deducted from the stages. The fabric inserts 4 and 5 are not cine! N hardening plastic, for example resin, soaked before or during them be brought into the overlapping position. J) you can add additional reinforcement inserts 8, as shown for example in the representation of FIG. 2 with dashed lines are inserted, which are also located over the joint 3 and the respectively corresponding steps extend.

The filling of the space between the reinforcements lay 4 and 5 can be done in the same way as you fill out the intermediate rune between these inlays in the non-graded area of the laminate of the components is provided.

Fig. 2 shows that the illustrated connection of the components 1 and 2 can lead to a thickening in the area of the joint 3. Still is by the overlapping reinforcement inserts 4 and 5 as well as by the foresight additional reinforcement inserts 8 and their embedding such a mutual Anchoring these reinforcement inserts takes place that the junction is practical in the r-rich Me is resilient as in the area outside this junction.

The production of the connection point is extremely simple and does not require any tools whatsoever; special skill.

4 shows a practical application in a schematic representation for the connection shown in FIGS. 1 and 2 and described above of components of a container, the container from bottom ring parts 9 and 10 and Wabdunstteile 11 and 12 connected therewith is constructed. In the left part of the figure is a finished connection 13 according to i. 2 recognizable that extends around that part of the case in which the wall parts 11 and 12 are already connected to the bottom ring parts 9 and 10.

, cloth the bottom ring parts are through an already completed connection 14 according to FIG. 2 connected to one another in a non-positive manner. along the bottom ring parts 9 and 10 are outside of the already connected to the wall parts 11 and 12 Area, the reinforcement inserts 15 can be seen, which from the stepped edge the bottom ring parts 9 and 10 protrude and also with the stepped Edge of the further still to be applied for the complete manufacture of the container 1.'ndungsteile are brought into the composite position described above according to FIG. 2 have to. Also on the wall part 12 are those on the gradation of the corresponding The edge reinforcing inserts 16 can be seen.

The container shown has to increase the dimensional stability and steel rings 17, 18 and 19 as assembly aids, the Gfs. after completion of the container can be removed again when the composite of the wall parts with each other and finished with the bottom ring parts.

In the case of containers without such steel rings or in addition to them Steel rings can be used as assembly aids to fix the components to be connected in the article according to Fig.. 3 may be provided. It can be seen there that the components 1 and 2, which correspond to the part-cylindrical; and slightly steep 11 and 12 of FIG. 4, above Bracket 20 with suction cups 21 arranged thereon is held in a predetermined position will. The suction cups 21 engage in de. The embodiment of FIG. 3 the outer layers of components 1 and 2, outside of the graduated Edges of the components, although such an arrangement is also necessary that the stripping on the inside of the components 1 and 2, namely on the fine layers or the thermoplastic liners.

Fig. 3 shows the connection point between the components 1 and 2 in a form in which the inner layers already form a butt joint 3, while the reinforcement inserts 4 and 5 have not yet been brought into their overlapping position have been, but still a rolled up position inside, in which the joint 3 is freely accessible. The completion of the connection of components 1 and 2 after FIG. 3 takes place in the manner already described in connection with FIG if necessary, in addition to the reinforcement inserts 4 and 5, further glass fiber fabric inserts can be inserted as intermediate layers in the manner already described.

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Claims (6)

Claims 1. Non-positive connection of reinforcement inserts, in particular fiberglass fabric, cut-out laminated plastic components, such as Containers, pipe components or pipe sections, that is to say n e t that the layers of the edges to be connected of the components (1,2), from one Butt joint (3) of the inner layers (6) starting, towards the outside like that are graded that the distance between the corresponding ends of the layers increases towards the outside, the length of the step being a multiple of the height of the step and from the ind.rì of the .sheets over the junction of the inner layers protruding reinforcement inserts (4,5) provided and in a filling the steps Lamination are embedded. 2. A compound according to claim 1, d a d u r c h L e k e n n -z e i c h n e t that the over the joint (3) of the inner .Schichten (6) protruding Reinforcement inserts (4,5) each up to the entire length of the corresponding Steps of the other edge protrude and additional ones, each over the corresponding one Steps extending reinforcing inserts (8) are provided. 3. Compound na n claim 1 or X, d a d u r c h g e k e n n z e i c h n e t that the components (1,2) with an inner Feischicht (6b) or a thermoplastic liner and a base laminate (6a) a few mm thick are, and that the Feischicht or the Sche liner and the base laminate as inner Layers form a butt joint (3). 4. Process for the production of components for connections according to a or more of claims 1 to 3, d u r c h g e n n n z e i c h n e t, that on the edges of the components to be connected during the lamination of the Steps that are offset from the inside to the outer layer are formed and from the steps to above the Reinforcing inserts protruding from the outermost edge of the components are laminated 5. The method according to claim 4, d a d u r c h g e k e n n z e i c h n e t that on A tear-off fabric is applied to the steps and prior to laminating out the areas removed between stages. 6. Method of manufacturing a container with a force-fit Compound according to one of Claims 1 to 3, d u r c h g e n n n z e i c h n e t that bottom ring parts and a bottom blank as well as shell-like partially cylindrical Wall pieces over brackets with suction cups attacking the inner or fine layers in overlapping position of the inner layers and after completion a saw cut through the overlap zone of the inner layers tIlì butt joint niteijiander connected and the area between the steps is laminated out. A. The method according to claim 6, d a d u r c h g e k e n n -z e i c h n e t that the bottom ring and the part-cylindrical wall parts via steel rings Additional support during assembly and the container with a Dome roof is closed.