RU2106251C1 - Apparatus for vacuum-digester molding of panels from polymeric composite materials - Google Patents

Abstract

FIELD: manufacture of constructional panels used in different branches of industry. SUBSTANCE: apparatus has base defined by rods 3 arranged in horizontal plane along molding enclosure 1, beds 2 mounted for movement along rods 3. Enclosure 1 is mounted on beds 2 through adjustable supports 5, which are positioned with at least two degrees of freedom. Enclosure 1 is fixed on supports 5 so as to define safety gap between enclosure and beds 2. Enclosure 1 and rods 3 are manufactured from material having equal or close linear thermal-expansion coefficients. Beds 2 are provided with additional openings 6 allowing beds to be interconnected by auxiliary rods, when supporting system for larger-size enclosure is required. EFFECT: increased efficiency, wider operational capabilities and enhanced reliability in operation. 6 cl, 9 dwg

Description

 The invention relates to the field of molding products from polymer composite materials and can be used for vacuum-autoclave molding of structural panels, for example, car interior panels, fuselage panels, wing or aircraft stabilizer, building panels, etc.

 A device for vacuum-autoclave molding of products from polymer composite materials, containing a system of metal pin adjustable supports and mounted on supports rigid fiberglass shells with various geometric parameters [1]. These shells are program carriers for adjusting supports and have working surfaces for forming sheet metal parts close-fitting. The pin supports are adjustable using hydraulic jacks. However, at elevated temperatures there is a deformation of the shells, which leads to a distortion of the shape of their working surface and, therefore, a distortion of the shape of the products.

 This drawback is eliminated in another known device for vacuum-autoclave molding of panels made of polymer composite materials, which contains a support system with vertically arranged lodgements and mounted on the upper parts of the lodgements molding shell [2].

 However, this device does not provide uniform heating of the forming shell, since stagnant zones form between lodges; As a result, a heterogeneous material structure and internal warping stresses occur in the manufactured product.

 The technical result of the invention is to ensure uniform heating of the forming shell and preventing its warping.

 To achieve the technical result, a device for vacuum-autoclave molding of panels made of polymer composite materials containing lodgements and a mold-forming shell mounted on lodgements, according to the invention, is provided with a base in the form of rods, lodgements are mounted on the rods with the ability to move along the latter, and the molding shell is mounted on tool holders by means of adjustable supports.

 Adjustable supports are designed to provide at least two degrees of freedom.

 The forming shell is mounted on adjustable supports with the formation of a guaranteed gap between it and the lodgements.

 The lodgements are mounted on rods on a movable landing.

 The forming shell and the rods are made of a material with an equal or close coefficient of linear thermal expansion.

 The lodgements are made with backup holes for the possibility of their connection using additional rods.

 In FIG. 1 shows the described device (general view), in FIG. 2 is the same, longitudinal section, in FIG. 3 is the same top view of FIG. 2, in FIG. 4 and 5 - adjustable support with two degrees of freedom, in FIG. 6 - adjustable support with three degrees of freedom, in FIG. 7 - connection of the lodgement with the rod through the sleeve, in FIG. 8 is a schematic diagram of reloading lodgements for a set of the estimated length of the device; FIG. 9 is a diagram of the reloading of lodgements for a set of the estimated width of the device.

 A device for vacuum-autoclave molding of panels of polymer composite materials contains a forming shell 1, lodgements 2 and the base. The forming shell 1 is mounted on lodges 2 by means of adjustable supports 5. The base is made in the form of rods 3. Lodges 2 are mounted on rods 3 with the possibility of movement along the axis of the latter. The shell 1 is fixed on adjustable supports with the formation of a guaranteed gap between it and the lodgements. In order to prevent snap warping, the forming shell and rods are made of material with an equal or close coefficient of linear thermal expansion. Depending on the dimensions of the configuration and other parameters, the forming shell 1 can be made of steel, aluminum, fiberglass or carbon fiber. For the manufacture of panels of complex configuration, the forming shell is made of a material with a coefficient of linear thermal expansion close to this coefficient of the material of the molded product.

 Supports 5 have the ability to move along the height and around the axis of attachment to the lodgement, which makes it possible to fix the forming shell of various curvatures relative to the base. In FIG. 4 and 5 show a support 5 with two degrees of freedom, in FIG. 6 - with three degrees of freedom.

 Lodgements 2 bases are made of sheet materials: steel, aluminum, fiberglass, etc. Sheet thickness (4 ... 10) mm. Dimensions are determined by the dimensions of the molded product. It is preferable to use a unified design, in this case with a size of 920 x 220 mm.

 The holes for connecting the lodgements with rods are made symmetrically with respect to the geometric axes of the lodgement with a constant pitch. In the lodgement there are backup holes 6 for connection with the rods in an amount equal to or greater than the main ones.

The unified design of the lodgements allows you to assemble the base of any size. The ability to assemble a base of any design length L is illustrated by the circuit shown in FIG. 8, where L ₁ is the maximum length of the rod, also of any design width H, by the circuit shown in FIG. 9, where H _{1 is the} width of the unified tool tray.

 The connection of the lodgements 2 with the rods 3 is carried out using the bushings 4 on a movable landing.

 When using the device on the shell 1 in the usual way, the polymer composite material is laid out in accordance with the given configuration of the panel being manufactured, and then vacuum-autoclave molding is performed. In the process of forming the panel due to the proposed structural embodiment of the device, it is possible to move lodgements relative to the rods when elongated from heating, thus warping the forming shell and distorting the geometry of the product. The presence of a guaranteed gap between the forming shell and the lodgement ensures its uniform heating and structural uniformity of the molded panel.

Claims (6)

 1. A device for vacuum-autoclave molding of panels made of polymer composite materials containing lodges and a mold-forming shell mounted on lodges, characterized in that it is provided with a base in the form of rods, lodges are mounted on rods with the ability to move along the latter, and the molding shell is mounted on lodges by means of adjustable supports.  2. The device according to claim 1, characterized in that the adjustable supports are configured to provide at least two degrees of freedom.  3. The device according to claim 1, characterized in that the forming shell is mounted on adjustable supports with the formation of a guaranteed gap between it and the lodgements.  4. The device according to p. 1, characterized in that the lodgements are installed on the rods on a movable landing.  5. The device according to claim 1, characterized in that the forming shell and the rods are made of material with an equal or close coefficient of linear thermal expansion.  6. The device according to claim 1, characterized in that the lodgements are made with backup holes for the possibility of their connection using additional rods.

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