Abstract: A method for decorative molding capable of reducing a preparation time at the time of replacing a mold and expecting improvement in positioning accuracy of a decorative pattern in a molded article includes supplying a film on which a decorative pattern is formed between a first mold and a second mold in a mold open state of a mold, imaging a mold-side alignment mark recorded in the mold and a film-side alignment mark recorded in the film by a camera, positioning the film with respect to the mold by moving the film so that the film-side alignment mark comes close to the mold-side alignment mark, injecting resin into the mold in a mold closed state in which the film is sandwiched between the first mold and the second mold and cooling the resin to form a molded article and opening the mold and taking out the molded article in which the decorative pattern of the film is transferred to the surface.

Abstract: In a decorative molding method a film having an uneven shape printed thereon and a film having a pattern printed thereon are separately supplied to a metal mold, the films are positioned separately, and a molding material is simultaneously injected into the metal mold to carry out injection molding. In a decorative molding apparatus for realizing the above method, a suction circuit for adsorbing each of the films on a film adsorption surface of the metal mold and an air blowing circuit for peeling off the films are disposed, and, after the injection molding, air blowing on each film is started separately from the start of opening of the metal mold, and the metal mold and the films are brought into a positive pressure state, then the molded article is taken out, a clamp jig is released to release the films, and the air blowing continues until the following patterns of the films are placed inside the metal mold.

Abstract: A method for decorative molding capable of reducing a preparation time at the time of replacing a mold and expecting improvement in positioning accuracy of a decorative pattern in a molded article includes supplying a film on which a decorative pattern is formed between a first mold and a second mold in a mold open state of a mold, imaging a mold-side alignment mark recorded in the mold and a film-side alignment mark recorded in the film by a camera, positioning the film with respect to the mold by moving the film so that the film-side alignment mark comes close to the mold-side alignment mark, injecting resin into the mold in a mold closed state in which the film is sandwiched between the first mold and the second mold and cooling the resin to form a molded article and opening the mold and taking out the molded article in which the decorative pattern of the film is transferred to the surface.

Abstract: A warm-air blowing circuit and another warm-air blowing circuit are disposed so as to heat a film from both sides of a projection side and a recess side of a die, warm air reaches and heats the film from the time of supplying of the film, warm air continues to enter a space in which a resin is to be ejected even after the die is closed, and thereby the film is likely to extend. Therefore, the film is unlikely to be torn at the time of molding when the film is likely to be shaped after a shape of the die and it is possible to prevent broken pieces of the film or broken pieces of a decoration film from being mixed and being stuck to the surface of the die such that it is possible to improve quality of the external appearance of a molded product.

Abstract: In a decorative molding method a film having an uneven shape printed thereon and a film having a pattern printed thereon are separately supplied to a metal mold, the films are positioned separately, and a molding material is simultaneously injected into the metal mold to carry out injection molding. In a decorative molding apparatus for realizing the above method, a suction circuit for adsorbing each of the films on a film adsorption surface of the metal mold and an air blowing circuit for peeling off the films are disposed, and, after the injection molding, air blowing on each film is started separately from the start of opening of the metal mold, and the metal mold and the films are brought into a positive pressure state, then the molded article is taken out, a clamp jig is released to release the films, and the air blowing continues until the following patterns of the films are placed inside the metal mold.

Abstract: A warm-air blowing circuit and another warm-air blowing circuit are disposed so as to heat a film from both sides of a projection side and a recess side of a die, warm air reaches and heats the film from the time of supplying of the film, warm air continues to enter a space in which a resin is to be ejected even after the die is closed, and thereby the film is likely to extend. Therefore, the film is unlikely to be torn at the time of molding when the film is likely to be shaped after a shape of the die and it is possible to prevent broken pieces of the film or broken pieces of a decoration film from being mixed and being stuck to the surface of the die such that it is possible to improve quality of the external appearance of a molded product.

Abstract: After a first die and a second die are opened, a base film of a film is separated from the first die so as to tilt the surface of the film with respect to a parting face of the first die.

Abstract: The surfaces of a decorated sheet are tilted with respect to a parting face before a movement of a clamping member. When the clamping member moves to press the decorated sheet under tension to the parting face, a part of the clamping member first comes into contact with the decorated sheet at a position determined by inclination of the surfaces of the decorated sheet and then another portion of the clamping member comes into contact with the decorated sheet.

Abstract: The surfaces of a decorated sheet are tilted with respect to a parting face before a movement of a clamping member. When the clamping member moves to press the decorated sheet under tension to the parting face, a part of the clamping member first comes into contact with the decorated sheet at a position determined by inclination of the surfaces of the decorated sheet and then another portion of the clamping member comes into contact with the decorated sheet.

Abstract: After a first die and a second die are opened, a base film of a film is separated from the first die so as to tilt the surface of the film with respect to a parting face of the first die.

Abstract: An injection molding method in which a multilayer film including a base layer and a transfer layer stacked on the base layer is disposed in the molding space of an injection mold, the molding space containing the multiplayer film is filled with resin, and then the injection mold is opened to obtain a molded article transferred with the transfer layer peeled from the base layer, wherein after the resin is injected into the molding space, a cooling circuit near the molding space cools the multilayer film before the injection mold is opened.

Abstract: An electrical discharge machining apparatus includes a work electrode adapted to support a work immersed in a working fluid, a tool electrode located opposing the work electrode with a predetermined gap therebetween, a capacitor that is connected between the work electrode and the tool electrode to provide a series of voltage pulses, a charging circuit having a power supply and a first switching element which are connected in series to the capacitor, a charge regulating circuit having a second switching element connected in series to the capacitor, and a control unit that controls the first and second switching elements, such that the first switching element turns on, and then the second switching element turns on before the first switching element turns off. Then, one voltage pulse, having a leading edge corresponding to the turning on of the first switching element and a trailing edge corresponding to the turning on of the second switching element, is generated.

Abstract: An electrical discharge machining apparatus includes a work electrode adapted to support a work immersed in a working fluid, a tool electrode located opposing the work electrode with a predetermined gap, a capacitor that is connected between the work electrode and the tool electrode to provide a series of voltage pulses, a charging circuit having a power supply and a first switching element which are connected in series to the capacitor, a charge regulating circuit having a second switching element connected in series to the capacitor, and a control unit that controls the first and second switching elements, such that the first switching element turns on, and then the second switching element turns on before the first switching element turns off. Then, one voltage pulse, having a leading edge corresponding to the turn on of the first switching element and a trailing edge corresponding to the turn on of the second switching element, is generated.

Abstract: A workpiece 7 is held on a table and moved in X and Y directions relative to a tool electrode 4, which is displaceable in a direction orthogonal to the X and Y directions. The position of the workpiece 7 to which it should be moved is calculated based on the current positional data of the tool electrode 4 relative to the workpiece 7 and the machining data. The workpiece 7 is moved continuously in X and Y directions to the thus obtained position in accordance with the shape being machined.