The safety device for injection molds comprises: a plate (1) attachable to a fixed part of a mold; a base (4) attachable to a movable part of a mold; wherein the base (4) comprises a safety shaft (10) movable between an unmounted position, wherein said safety shaft (10) is housed in a bore (13) of the plate (1), preventing displacement between the plate (1) and the base (4), and an assembled position, in which said safety shaft (10) is located outside the hole (13) of the plate (1), the displacement of the safety shaft (10) being driven by an actuator (7), allowing displacement between the plate (1) and the base (4). It ensures the connection of the two parts of the mold when the mold is not mounted on the injection molding machine.
A slide assembly for injection molds includes a closing wedge, a slide body provided with a hole for at least partially housing said closing wedge, and a figure insert coupled to the slide body. The figure insert in the use position is vertically and horizontally movable with respect to the slide body. The slide assembly is both economical and simple.
The dating system for molds comprises at least one date stamp (12) connected to a knob (4) through a connection cable (1), wherein the date stamp (12) comprises an engraving formed only by numbers and/or letters and a position indicator. Furthermore, said knob (4) is mounted on a control block (2) comprising a reading engraving (3) located around said knob (4), in correspondence with the engraving of said date stamp (12). This makes it possible to manufacture date stamps with the information, without relief, since the simple contrast of the areas of the date stamp polished with high gloss and the nuanced numbers or letters, offer a visual contrast that allows clearly identifying the information that the date stamp must transmit.
The dating system for molds comprises a marking element (1) that engraves a determined date; wherein said marking element (1) comprises interchangeable inserts (2) indicating said determined date, said determined date being defined by letters and/or numbers, forming a line. It permits to obtain the advantages of: the reading of the information is much clearer than the traditional date stamps; it requires a minimum space, which allows to adapt it to practically any mold; and it is much more dynamic than traditional daters, as it can provide date information in multiple formats, such as day and month, or week and year number, or combinations thereof.
The device for demoulding negatives in thermoplastic injection moulds comprises an ejector (1) provided on one of the ends thereof with a figure insert (2) with a profile complementary to the part that is to be moulded, wherein said ejector (1) comprises an outer tube (11) housing an inner cooling tube (12), which cools said figure insert (2).
It allows for a device to be provided for demoulding negatives in thermoplastic injection moulds which enables the part to be obtained to be cooled, the cooling circuit reaching the figure area of the mould.
Metal molds for injection of plastics and accessories therefor, namely, slides, undercuts, ejectors, date stamps, inserts and markers, valves and pistons, and cylinders
8.
Device for demolding negatives in thermoplastic injection molds
A device for demolding negatives in thermoplastic injection molds includes an ejector which comprises an ejector profile for the fastening thereof to an ejector plate and a figure insert with a profile that is complementary to a piece to be molded. The ejector further comprises a flexible element arranged between the ejector profile and the figure insert which pushes the figure insert in order to demold the negative by an angular displacement and stretches the figure insert so as to return the ejector to the injection position thereof. The device eliminates the need for molding sliders which are costly as well as the need for a machining process for the installation thereof.
B29C 33/44 - Moules ou noyauxLeurs détails ou accessoires comportant des moyens ou conçus spécialement pour faciliter le démoulage d'objets, p. ex. des objets à contre-dépouille
The device for the suction of air in injection molds and the subsequent expulsion of molded pieces has a Venturi ejector connected to a first valve, that when the mold is closed causes the suction of air in a mold cavity, having at least one insert made from porous material through which and by means of a communication duct that defines a suction circuit, and a second valve, that after the solidification of the plastic material, causes the air to be blown towards the at least one insert made of porous material, cleaning the at least one insert made of porous material. The volume of air to be reduced in the second part of the injection cycle with the same empirical value of 90% efficiency of the Venturi ejector.
A device for demolding parts includes a slider for housing a figure insert for the molding of a negative of the part to be molded. The slider is associated with a push rod, which can move the slider to an ejection position of a part to be molded. The device also includes a gas cylinder for driving the displacement of the push rod. The device eliminates an inclined guide and a safety wedge, saving a great deal of work and focusing all the machining only on a punch plate.
B29C 45/40 - Démoulage ou éjection des objets formés
B29C 45/44 - Démoulage ou éjection des objets formés d'objets à contre-dépouille
B29C 45/33 - Moules comportant des éléments de moule transversalement mobiles, p. ex. radialement
B29C 33/46 - Moules ou noyauxLeurs détails ou accessoires comportant des moyens ou conçus spécialement pour faciliter le démoulage d'objets, p. ex. des objets à contre-dépouille utilisant la pression d'un fluide
The present invention relates to a device for demolding parts, comprising a skid (1) comprising a slide (8) for housing a shaping insert (2) for molding a negative (10) of the part to be molded, said slide (8) being obliquely associated with a pushrod (9) which can move said slide (8) to an ejection position for ejecting a part to be molded, and characterized in that said pushrod (9) comprises at the upper end thereof a rack (21) meshing with another rack (22) of said slide (8), the movement of said pushrod (9) being transferred to said slide (8) through said racks (21, 22).
The invention allows reducing the volume with respect to the device described in the aforementioned document, such that it does not take up too much space when being assembled inside the shape of the mold.
B29C 33/44 - Moules ou noyauxLeurs détails ou accessoires comportant des moyens ou conçus spécialement pour faciliter le démoulage d'objets, p. ex. des objets à contre-dépouille
A slide, like those used in injection molds, includes a closure unit with a first complementary profile complementary with the second complementary profile of a slide body, the complementary profiles being double wedge-shaped, where the double wedge has oblique end surfaces determining a fixed positioning and locked position between the closure unit and the slide body, such that the slide body includes a rail in the lower base coupleable to a slide guide on which the slide body slides.
A plastic injection mold which allows extracting the air from inside it during the injection process, and an extraction method, where the mold includes closing means, one or more injection cavities provided with at least one injection nozzle for introducing the hot material in a liquid state and at least one ejector device formed by a housing for an ejector pin responsible for extracting the part already molded, where an air duct connected to a vacuum pump or a suction device intercepts the housings of the ejector pins causing a suction of the air from inside the mold.
The invention relates to a slide rail, like those for use in injection molds, which includes a clamp unit having a first portion compatible with the second additional portion of slide rail body, said additional portions having a double wedge shape. Said double wedge has oblique end areas, defining a fixed position for positioning and interlocking between the clamp unit and the slide rail body. The slide rail body includes a track on the lower base thereof that can be connected to the slide rail guide, on which the slide rail body moves.
The invention relates to a plastic injection mould (1) which allows extracting the air from inside it during the injection process, and an extraction method, wherein said mould (1) basically comprises closing means, one or more injection cavities (2) provided with at least one injection nozzle for introducing the hot material in a liquid state and at least one ejector device formed by a housing (3) for an ejector pin (4) responsible for extracting the part already moulded, wherein an air duct (6) connected to a vacuum pump or a suction device (7) intercepts said housings (3) of the ejector pins (4) causing a suction of the air from inside the mould (1).
The invention relates to a slide mechanism comprising: an ejector shaft (2) with a first end portion (2c) connected to a moving ejector plate (3) and a second conical end portion (2a) which terminates in a protrusion (2b) coupled to a cam (6), said protrusion (2b) serving as a rotation shaft on which the cam (6) can oscillate; a wedge-shaped slide (5) including a moulding portion (5d), an inclined segment (5a) between a push surface (5b), which is in contact with the part to be obtained (10), and a base segment (5c), and a sliding passage (14) which extends through the slide (5) in which at least one portion of the cam (6) slides in parallel with the negative (11a); and a stationary sliding support (4) including an axial passage (4a) through which the ejector shaft (2) slides axially and a slope (4c) on which the inclined segment (5a) of the slide (5) moves, said slope having a complementary inclination to that of the inclined segment (5a) of the slide.
