DE1230550B - Process for the production of one-piece objects, components or molded bodies with a preformed lightweight core in a multi-part mold surrounded by a glass fiber reinforced cast resin jacket - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

Int. CL:

B29d

German KL: '39 a3 - 27700

Number: .1230550

File number: . D 33042 X / 39 a3
Filing date: April 6, 1960
Opening day: December 15, 1966

The invention relates to a method of manufacture of one-piece objects, components or moldings with a glass fiber reinforced Preformed lightweight core surrounded by casting resin, in a multi-part form.

It is known per se to produce one-piece objects, components or molded bodies with a preformed lightweight core surrounded by a glass fiber-reinforced cast resin jacket in a multi-part form. ; -.- For this purpose, one-piece, self-contained frames, in particular window or door frames with a glass fiber-reinforced cast resin jacket and a foam plastic insert in an upper and a lower part, are required. Form has already been proposed to enclose a foam plastic insert preformed according to the interior of the mold and the required cast resin jacket thickness with a glass fiber layer so that it holds the foam plastic insert after its use in the mold at a distance of the desired cast resin jacket thickness from the inner walls of the molded parts, whereupon in the mold Casting resin is introduced, which soaks the glass fiber layer filling the space between the inner wall of the mold and the foam plastic insert and is then cured.

In contrast, the invention consists in that the preformed lightweight core is in several parts and its individual, in a known · way with a fiber optic. layered core parts with spacing from one another inserted into the interior of the mold and the spaces thus formed between each other adjacent core parts are filled with a glass fiber product, whereupon in a known manner after the mold is closed, the casting resin is introduced into it and cured.

The measures according to the invention allow one-piece glass fiber reinforced plastic objects produce, with in advance precisely determinable strength properties, z. B. prefabricated parts for the most diverse areas of application, including more complex shapes. This can e.g. Window and door frames, components for prefabricated houses, hats for railroad barriers, light masts, components for electrical systems in which the high insulation value of the component is of particular advantage, Be floating buoys for shipping.

The execution of the inner webs, inner ribs or bulkheads, the strength of the object to be manufactured supporting fixtures, is achieved according to the invention in that two or a plurality of preformed and with a glass fiber layer method for the production of one-piece
Objects, components or moldings with a glass fiber reinforced cast resin jacket
surrounded preformed lightweight core in one
multi-part shape.

Applicant:

Duroplast foam composite building. m. b. H.,

Nuremberg,. Prinzregentenufer 13

Named as inventor: .... ..: "·;.-...-.-

Dipl.-Ing. Hermann Mylius, Nuremberg

provided partial cores are inserted into the mold at a distance from one another. The distance between two adjacent part cores is selected here according to the thickness that is to be arranged in the component Support installation should be given. This gap created by the distance becomes filled in with a fiberglass product. After this after the mold is closed, the casting resin is introduced into the mold in a known manner, z. B. pressed in under pressure. Here, all glass fiber layers are between .the inner wall of the mold and the surface of the part cores and the glass fiber inlays between the part cores of the casting resin soaked .. The hardening of the cast resin not only creates the glass fiber reinforced one Cast resin jacket, but also the glass fiber reinforced ones that serve to increase strength Supporting fixtures of the component.

By varying the amount of fiberglass in the spaces between the dividing cores, it is easily possible, even while maintaining the respective intended distance between the partial cores, the strength properties of the component to be manufactured and the loads, to which this is to be exposed to adapt, both uniformly over the entire extent of the component and, if necessary, different in sections.

A further advantageous embodiment of the invention consists in that the core parts penetrate with them Recesses, also of various shapes, are provided with the glass fiber product fill out. This makes it possible in a simple manner, for example in the case of elongated ones Assemble these at right angles or at an angle to his

509 747/311

To provide longitudinal struts or reinforcements and supports.

To reinforce the cast resin jacket of the component in certain areas and thereby the general Another advantageous embodiment of the method is to increase the strength of the component still considerably proposed according to the invention, grooves in the surface of the core parts in a known manner or to incorporate recesses that are filled with a fiberglass product. These measures enables z. B. the arrangement of the glass fiber reinforced jacket supporting reinforcing ribs, which extend from one transverse bulkhead to the next extend. The reinforcement ribs can also be arranged in such a way that they form a lattice form work. This makes it possible, if necessary, to reduce the thickness of the cast resin jacket considerably, without weakening the strength behavior of the cast resin jacket.

In the drawing are exemplary embodiments of Components manufactured according to the invention shown. It shows

1 shows a component in a perspective view with a broken corner,

Fig. 2 is a plan view of the component according toFig. 1 without broken corner,

3 shows a section on the line C-D according to FIG. 2,

F i g. 4 shows a section in line AB according to FIG. 2 and

5 shows a core part in a perspective representation.

According to the exemplary embodiment, the product produced according to the invention consists on the one hand Walls, ribs or webs 1 to 4 made of a glass fiber reinforced cast resin and on the other Light cores 5, 6, which are preferably made from a synthetic resin hard foam.

According to the invention, the parts 1 to 4 can have any shape, shape, thickness and strength give. So here the outer wall 1 is provided, within which the continuous inner wall 2 is located in the manner of a bulkhead. In addition, there is an all-round internal ribbing 3 and corresponding Cross webs 4 available.

For the purpose of producing the continuous wall 2, the two partial cores 5 and 6 are in the mold with a distance corresponding to the thickness of the wall 2 has been inserted, and before the implementation of the Casting process the cavity between the cores 5 and 6 filled with a glass fiber product became. The cavities between the partial cores and the inner wall of the mold are in the same way has been provided with a fiberglass product.

For the purpose of producing the ribs or webs 3 and 4, the cores 5 and 6 are correspondingly inserted Grooves or recesses incorporated, e.g. B. milled, and also before performing the casting process has been filled in with the fiberglass product.

Such a prepared partial core is shown diagrammatically in FIG. 5 shown.

Claims (3)

Patent claims: 1. Process for the production of one-piece objects, components or moldings with preformed lightweight core surrounded by a glass fiber reinforced cast resin jacket in one multi-part form, characterized in that several pre-formed and in known Way core parts provided with a glass fiber layer at a distance from one another in the interior inserted into the mold and the spaces thus formed between adjacent one another Core parts are filled with a fiberglass product, after which in a known manner When the mold is closed, the casting resin is introduced into it and cured. 2. The method according to claim 1, characterized in that the core parts with these penetrating Recesses are provided, and these recesses are filled with fiberglass will. 3. The method according to claims 1 and 2, characterized in that grooves or recesses are incorporated in the surface of the core parts in a known manner, which are filled with glass fiber product. Considered publications:
German patent specifications No. 851 851, 922 440,
005;
Swiss patent specification No. 336 595. 1 sheet of drawings 609 747/311 12.66 © Bundesdruckerei Berlin