SU785044A1 - Unit for moulding articles of polymeric materials - Google Patents

Description

(54) INSTALLATION FOR FORMING PRODUCTS FROM POLYMER MATERIALS 1 -. This invention relates to plastics processing plants. It can be used, naphl1er, in the chemical industry during the molding of plastic products with the subsequent cleaning of the mold from the remnants of the material adhered to the plane of the mold. A known apparatus for molding polymeric materials, comprising a mold attached to the press and a device for cleaning the stitch-form from remnants of material that is attached to the surface of the mold cavity (ij. The device for cleaning includes a reversible brush from an electric motor, equipped with a displacement means allowing it to move in a horizontal and vertical direction, in sync with the movement of the injection press. cleaning of multi-cavity press molds to form compact products of complex configuration, since the bristles of the rotating brush are not able to penetrate the narrow holes of the matrix sockets and channels of the gating system. A device that is closest to the invention and contains half-mold press plates, a frame with a mold cleaning device attached to it with brushes and with a feed mechanism into the mold connector f3j "The cleaning device is also equipped with a liquid feed system that is injected in the working area of the mold during the reverse movement of the piston of the hydraulic cylinder to reduce the adhesion of the material to the working surface of the mold of the injection molding machine. The disadvantage of such a device for cleaning is the impossibility of high-quality cleaning of the narrow holes of the matrix sockets due to the lack of contact of the bristles of the brush with the entire surface of these nests. The purpose of the invention is to improve the quality of cleaning the press form with forming cavities of complex configuration. This is achieved by the fact that in the installation containing the mold halves fixed on the press plates, the frame with the mold cleaning device attached to it with brushes and with the feed mechanism to the mold connector according to the invention, the device for cleaning is filled in the form of a vibrator the bases with rigidly fixed electromagnets and rod stops installed to their periphery, some of which face the surface to be cleaned, and the others are interconnected by compression springs and placed between the base A expansion wedge device equipped with a drive for its movement, the brushes being attached to the electromagnets and provided with a working surface repeating the configuration of the forming cavity of the mold half. The invention is illustrated in the drawings, where FIG. 1 shows the proposed installation, general view; 2, a cleaning device, longitudinal section. The apparatus comprises a press, on the upper 1 and lower 2 plates of which the molds are fixed, and a device for cleaning the mold half, made in the form of a vibrator, including two bases 3 with electromagnets 4 fixed to them with electromagnets 4 mounted on the periphery of the bases sterisnevye stops 5, one ends which face the surface to be cleaned, while others are joined by springs 6 of compression, an expansion wedge 7 disposed between the bases, equipped with a drive 8 for its movement, brushes 9, for electrodes on electromagnets, The surface of the brushes is made according to the profile of the forming cavity of the mold The cleaning device is fixed on the rotation mechanism 10 placed on the press frame 11. For the compressed air supply the cleaning device is provided with perforated tubes 12 fixed on the stops 5. The installation works as follows

After the product is molded, the upper plate 1 of the press is lifted to the finished mold, the finished product is removed, a signal is sent to the syringe {driving / driving mechanism 1O, on which the cleaning device is attached to the mold connector. When this signal is given to the elec 7

their peripherals are rod stops, some ends are facing the cleaned one, and others are connected to each other by compression springs, and an expansion wedge device placed between the bases, equipped with a drive for its movement, the brushes attached to the electromagnets and the solenoids 4 and 8 wedge 7. The latter pushes the bases of 3 electromagnets on which the brushes 9 are attached, pressing them against the working surface of the half-form. The signal applied to the electromagnets vibrates them, while the brushes clean the working surface of the molds. The stops 5, located along the periphery of the bases 3, ensure the concentration of the vibration energy on the brushes and eliminate the parasitic influence on the structural elements of the entire device. After the end of the process; the cleaning is triggered by a time switch, which sends a signal to the actuator 8, which returns the wedge device to its original position at the same time as the electromagnets are turned off. The compression springs 6 connecting the bases 3 of the electromagnets 4 return them to their original position. Thereafter, a signal is sent to the rotator actuator, which leads to a device for cleaning from the mold connector. To improve the quality of the cleaning of the mold during the cleaning process, compressed air is additionally supplied through the tube 12, placing the body on the stops 5. Then the cycle repeats. The application of the proposed installation allows high-quality cleaning of multi-cavity molds with a complex configuration of the forming cavity, especially used in the molding of small-sized products. Formula of the invention Installation for molding articles from polymeric materials, containing fixed on the press plates, poproforms, a frame with a device for cleaning the mold with brushes fixed on it, and with a feed mechanism to the mold connector, characterized in that quality of cleaning of molds with complex cavities of a complex configuration, the device for cleaning is expelled in the form of a vibrator, including two bases with rigidly fixed electromagnets in with

578SO44 6

whose surface is repeating config-1. US Patent No. 3801251,

the formation of the mold cavity half-mold, cl. 425-229, pub. 1974.

Sources of information g. U.S. Patent No. 3,248,762

taken into account in the examination-cl. 164-158, pub. 1966 (prototype).

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Claims (1)

Claim Installation for molding products from polymeric materials, containing semi-molds mounted on the press plates, a frame with a device for cleaning the mold with brushes fixed to it and a mechanism for feeding it to the mold connector, characterized in that, in order to improve the quality of cleaning the molds with molding cavities of complex configuration, the cleaning device is made in the form of a vibrator, including two bases with rigidly fixed electromagnets and with rod stops installed at their periphery, one ends of which ascheny to the surface being cleaned, and others - are interconnected by a compression spring and disposed between 'bases spreader wedge device provided with a drive of its movement, the brushes are fixed on the electromagnets and adapted Started 5 785044 ^λ 6 whose surface repeats the configuration of the forming cavity of the mold.