SU794942A2 - Universal press for forming flat or curved panels from nonmetals - Google Patents

Description

The invention relates to equipment for the processing of polymeric materials .noB, namely, devices for pressure molding, transferring through Mfciv, the walls of an elastic bag. According to the main auth. If 639206, a universal press is known for forming flat or curvilinear panels of non-metallic materials containing a frame, an elastic punch, for example a pneumatic bag, and a roll-in matrix. Two electrodes, made in the form of a flexible sheet of conductive material, which are electrically connected to the outputs of the high-frequency generator, are attached to the end surfaces of the elastic punch and the dies, and the electrode attached to the end surface of the tunson is clearly connected to the generator. The ktroth, which is fixed on the end surface of the matrix with the possibility of l. In a known press, the connection of the electrode fixed on the end surface of the matrix, with the corresponding output of the high-frequency generator, is made in the form of a pneumatic or hydraulic cylinder mounted on the press frame, on the stem of which a massive copper pad is bolted, and the same block mounted on the mat , and connected to the genus. The lack of a press is in the duration of the cooling of the panel, which is under the pressure of an elastic label. Li, eJib of the invention increase press productivity due to intensive cooling of the foils. The goal is achieved by: -ITO press C; abraded with an elastic gasket with parallel cooling tubes spaced therein, installed between the elastic punch and the flexible electrode fixed on it, the coolant tubes being located in the direction perpendicular to the plane of the bend of the electrode. Such a press design provides intensive cooling of the panel g; after the termination of heating, while retaining the flexibility of the gugohn and the electrode. FIG. 1 shows a universal press, a general view; in fig. 2 - cooling tube fastening; in fig. the location of the cooling tubes relative to the electrode when forming curved panels. The press contains frame 1, an elastic punch (bag) 2, a flexible el.Estrode 3 fixed on the end surface of the punch (dotted punch 2 and electrode 2 are shown in working condition, pressed to the product). The press also contains a flexible electrode 4 fixed on the roll-in matrix 5, which is fed to the press along the roller table 6. Electrodes 3 and 4 are made in the form of a sheet of conductive material. On the matrix 5 is fixed and massive copper pad 7, electrically connected to the electrode 4, with which the movable block 8 contacts, hinged to the rod of the pneumatic or hydraulic cylinder 9, Conclusions 10 of the high-frequency generator 11 are connected to the electrode 3, and the block 8 with flexible tires 12 and 13, To the punch 2 (FIG. 2), the beam 14 out of is formed. fiberglass. The length of the beam is equal to the length of the electrode 3 along its generator. The same beam is formed to the punch 2 along its opposite edge. The shaping is made of fiberglass 15 impregnated with a binder. Electrode 3 is fastened to the beams 14 along their entire length with screws 16. A gasket 17 of elastic material is installed between the punch 2 and the electrode 3. The gasket contains cooling tubes 18 located in the direction perpendicular to the plane of the bend of electrode 3. The most preferred copper shaped tubes of rectangular section that are outside the electrode, as shown in FIG. 3, are connected by elastic tubes 19, for example, fluoroplastics or polyethylene 1 1I. Alternatively, the cooling tube may be single, made of an elastic material, for example, fluoroplastic. The press works as follows. The workpiece 20 is laid on the surface of the electrode 4 fixed on the matrix 5, and along the roll table 6 moves to the pressing position. Compressed air is supplied to the punch 2, as a result of which the punch, blowing, presses the electrode 3 to the product 20 and to the electrode 4. Under the action of the pneumatic or hydraulic cylinder 9, the pad 8 is pressed against the block 7, thus connecting one of the outputs of the generator 11 with the matrix electrode 4 5, the generator 11 is turned on and between the electrodes 3 and 4 pressed on both sides to the workpiece, a high-frequency electric field is generated in which the panel is heated. At the end of the heating, the generator 11 is turned on. The block 8 is returned by the hydraulic cylinder 9 to its initial position, cooling water is supplied to the tube 18.

air is released, the punch is compressed, lifting the electrode 3 and releasing the product 20. The finished product 20 on the matrix 5 along the roller table b is led out of the press.

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Fi.g.3

The press according to the invention makes it possible to significantly shorten the cooling time of the panels during their molding and thereby increase the productivity.

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