WO2006056632A2

WO2006056632A2 - Method of inserting a heat-inductor plate into the support base of a cooking container, means for implementing same and resulting container

Info

Publication number: WO2006056632A2
Application number: PCT/ES2005/000616
Authority: WO
Inventors: Aldo Mistrali
Original assignee: Comercial Valira, S.A.
Priority date: 2004-11-17
Filing date: 2005-11-15
Publication date: 2006-06-01
Also published as: ES2254020A1; WO2006056632A3; ES2254020B1

Abstract

The invention relates to a method of inserting a ferromagnetic heat-inductor plate (D) into the support base (B) of a cooking container which is moulded from a non-magnetic material. The inductor plate (D) comprises one face which is intended to come into contact with the non-magnetic material that forms the thickness of the support base. Said face is equipped with anchoring projections (H) which project out towards the face of the mould half that forms the concave part of the support base and which, during moulding, are sealed in the molten mass of the non-magnetic material, such that they are integrated in the thickness of the support base. The other face of the inductor plate is disposed against a recess in the other mould half and forms the exposed face of the support base (B). The invention also relates to means for implementing said method and to the resulting container.

Description

METHOD FOR INSERTING A HEAT INDUCTION PLATE IN THE FUND

SEAT OF A COOKING CONTAINER, MEANS FOR YOUR

REALIZATION AND RESULTING CONTAINER

DESCRIPTION

Field of the invention

The present invention relates to a method for inserting a heat inducing plate into the seat bottom of a cooking vessel, including in the same invention means for its realization and a cooking vessel resulting from the invention, said resulting container being one of the type of the constituents of a kitchen battery and the like that must be suitable for use in electromagnetic induction stoves, without preventing its use in other heat sources such as electric hotplates or gas burners, whether they are direct action or through a plate of glass ceramic material.

State of the art

Said kitchen containers suitable for stoves with an electromagnetic induction heat system must be made of ferromagnetic material, so cooking vessels constructed in other conventional materials, such as aluminum, austenitic stainless steel, are not suitable for this purpose. , copper, ceramics, etc.

With the purpose of obtaining cooking utensils in any of the aforementioned conventional materials, which have optimal hygienic characteristics, good thermal performance and good food treatment that does not modify the organoleptic characteristics of cooked food, circumstances that are not present in The containers made of ferromagnetic material, the solution of incorporating into a cooking utensil, preferably made of austenitic stainless steel or aluminum, has been adopted, as the most usual materials currently are an element of ferromagnetic material attached to the outer face of its background, with Io which is achieved that the heat generated in said plate by electromagnetic induction is transmitted to the utensil and from this to the contents thereof.

This solution has given rise to various patents in which different ways of carrying out the incorporation of said ferromagnetic element are detailed. Thus, there is knowledge of the patent ES2002979, in which the ferromagnetic element consists of an accessory to be placed on the induction hob and on which the heating vessel constructed in aluminum, austenitic steel, ceramic ("mud") is placed. , etc. In other cases, it has been foreseen that the ferromagnetic element is disposed firmly in solidarity with the utensil, as set forth in the ES2002980 patent, in which said ferromagnetic element constitutes a lining for an aluminum thermo-diffuser plate in solidarity with a stainless steel utensil. austenitic Similarly, patent EP0695282 foresees the application of an induction heat generating substrate to a ceramic ("mud") or ceramic hob; The patent ES2135632 proposes placing on the bottom of the thermiffuser a culinary vessel some pieces of steel sheet filling, fixed to each other and to said bottom by laser welding; The patent ES2108284 in which the arrangement of a ferromagnetic sheet is also provided on the thermosetting bottom according to a surface smaller than that thereof; and the utility model ES1052835, in which a ferromagnetic plate is anchored by riveting in pop-up teats at the bottom of a previously molded aluminum tool.

Obviously, from all this it is concluded that it is known to incorporate at the bottom of a cooking utensil a suitable arrangement to generate the heat of the cooking by means of electromagnetic induction and, likewise, that various systems for relating the bottom of a utensil with the means capable of generating heat by induction, such as the various ferromagnetic elements used in the aforementioned background.

In most of the known antecedents, the ferromagnetic element is fixed to the outer face of the actual seat bottom of the container, or to the outer face of the thermofuser faceplate, by welding, pressure insertion, anchoring with riveting, projection, etc., demonstrating the experience that such fixing means are relatively ineffective in their thermal performance and resistant to the effects of the continuous and successive thermal expansion to which the tool is subjected throughout its use, which reduces its thermal performance by he by losing the intimate surface contact in most of the areas in mutual contact of the bottom of the container with the ferromagnetic element, subtracting an effective contact only at the welding and / or anchor points.

In order to avoid such inconveniences and obtain a maximum of thermal efficiency, the solution was adopted that the ferromagnetic element constituted an insert that, included at the bottom of the body of the cooking utensil, appeared as constituting the outer face thereof.

In accordance with the preceding solution, the method of manufacturing a cooking tool object of the patent ES200301776 was developed, said manufacturing consisting in a molding operation of the body of the cooking tool carried out in accordance with the circumstance that in the forming half-mold of the convexity of the body to be molded, constitutive of the cooking tool, an inductive plate of ferromagnetic material provided with a plurality of anchoring through holes having its two-dimensional and growing straight section towards the bottom of said mold is firmly attached face of its attachment to said semi-mold, which through holes are filled by the molten aluminum material that flows through the mold during the molding operation and solidifies, also inside them, at the end of said molding operation.

The solution adopted in said last referred patent ES200301776, is the one that is schematically represented in Figure 1 of the drawings that accompany the present specification and which, essentially, consists in that the inductor plate consists of an insert of the container in which The molten material constituting the same passes through the special two-dimensional through holes provided in said inductor plate forming retaining protrusions. Thus, in said figure 1 the half-mold A of concavity forming the bottom B of the container and the half-mold C forming the convexity of said bottom B is partially shown, it being observed that the inductor plate D is anchored to said bottom B by means of the protuberances Retainers E configured as mushrooms, providing that the inductor plate D is firmly attached to the inner face of the half-mold A by means of the action of magnetic means F and / or retaining pins G inserted in the inductor plate D. Obviously, the retaining protuberances E, as detailed in Figure 2, are constituted by the material with which the container has been molded, generally aluminum.

In the previous case, the anchoring of the inductor plate D to the bottom B of the container is carried out by means of the retaining protuberances E formed by molding the material that forms the aforementioned bottom B, which determines that the inductor plate D, in At the time of molding, it can be separated from its seat against the half-mold C by the creep of the molten material, despite the action of the magnetic means F, whereby it has been necessary to have the retaining pins G to ensure that in The molding operation does not move the inductor plate D that must remain inserted in the bottom B.

Summary of the invention

In order to avoid the use, very cumbersome, of the aforementioned retaining pins G and the inconveniences that they determine in the molding operation, since they are not integrated in the molten material, the solution that the anchoring protuberances has been adopted H come from the inductor plate D, as it has been schematized in Figure 3, in which at the instance of greater compression they have been represented in the same way as those referenced with the letter E in the previous case.

Thus, in accordance with the preceding solution adopted, the invention proposes a method for inserting a heat inducing plate into the bottom of a cooking vessel seat, said method being applied to obtaining a container which, molded in a non-magnetic material , it is intended to be preferably used in a heat source of the induction type, the seat bottom of said container being molded using at least two forming half-molds of said seat bottom, said half-molds belonging to the same forming mold of said container, where one of said half-molds forms the concave or inner part of said seat bottom while the other half-mold forms the convex or outer part of said seat bottom, characterized in that, at the bottom of the active face of the forming half-mold of the convex part of said seat bottom, a recess is provided for the fitting of an inductor plate of ferromagn material ethical that is attached to said recessed by one of its two faces that It is substantially flat and should appear as the exposed face of said seat bottom, ensuring the positioning of said inductor plate in the mold, during the operation of molding the container, thanks to positioning means provided in said inductor plate and / or in said forming half-mold of the convex part of said seat bottom, while the other face of said inductor plate, which is intended to be in intimate contact with the non-magnetic material that constitutes the thickness of said seat bottom, is provided with a plurality of anchoring protuberances that project towards the active face of said shaping half-mold of the concave part of the seat bottom and which in the molding are occluded in the molten mass of the constituent non-magnetic material of the container to subtract monolithically with it once the container.

Preferably, the anchoring protuberances have a cantilevered part oriented and / or configured so that, by totally excluding said anchoring protuberances in the solidified mass of the molded non-magnetic material in the fluid state, such cantilever parts prevent the sliding separation of said plate inductor with respect to said bottom of the vessel seat.

Preferably, the anchoring protuberances are constituted by provisions of the group comprising those formed by mechanization of the inductor plate itself and / or the inserts incorporated therein.

Some characteristics of the method, which are mutually exclusive alternatives, consist in that the anchoring protrusions of the inductor plate project distantly, without reaching it, towards the active face of the forming half-mold of the concave part of the bottom of the container, or that said protuberances anchoring of the inductor plate are projected until applied elastically and punctually against the active face of the shaping half-mold of the concave part of the bottom of the container.

Other preferred features of the method of the invention lie in the various special constitutions of the anchoring protrusions, which may be the following: A.- The normal projection of the cantilever part of the anchoring protrusions on the plane of the inductor plate is greater than the normal projection of the rest of said anchoring protuberance on said plane. B.- The normal projection of the cantilever part of the anchoring protrusions on the plane of the inductor plate does not coincide with the insertion surface of said anchor protuberance in said plane of the inductor plate. C- The normal projection of the cantilever part of the anchoring protrusions on the plane of the inductor plate coincides with the insertion surface of said anchoring protuberance in said plane of the inductor plate, while said cantilever part presents a transverse opening D.- The normal projection of the cantilever part of the anchoring protrusions on the plane of the inductor plate crosses the footprint left in the latter when forming, by means of said inductor plate, said anchoring protuberances. E.- The normal projection of said cantilever part of the anchoring protrusions on the plane of said inductor plate is external to the footprint left in the latter when forming, by tearing with tearing of said inductor plate, said anchoring protuberances.

Finally, other preferred features of the method of the invention are those which are listed below: a.- As positioning means intended to ensure the mounting of the inductor plate at the bottom of the recess of the forming half-mold of the convex part of the bottom of the vessel seat , elastic protrusions are provided of the inductor plate itself, among which the anchoring protuberances are included. b.- As said positioning means are arranged, arranged emerging from the bottom of said recess, centering means and, arranged on the conductive plate, means that are complementary to said centering means and that do not interfere with the anchoring protrusions, c- As said positioning means, magnetic actuation arrangements are provided. d.- The non-magnetic material consists of one chosen from the group that includes non-ferrous metal materials, ceramic materials, vitreous materials and synthetic plastic materials, be considered in isolation or in their possible combinations. e.- The molding operation is one of the group comprising casting, injection and pressing molding, whether they are considered in isolation or in their possible combinations.

In order to develop the method according to the invention set forth in the foregoing, some means are provided for the realization of the insertion of a heat-inducing plate in the seat bottom of a cooking vessel, specifically some means that allow an operation of Conventional molding, made by means of shaping half-molds of the concavity and of the convexity of said seat bottom, adapts to said method according to the invention, characterized in that the inductor plate is a plate of ferromagnetic material which, being flat on the face that constitutes The outer surface of said seat bottom of the container, has on its other side, with which its union occurs with the non-magnetic material of said seat bottom, a plurality of anchoring protuberances that are substantially differentiated, each of them, in a foot related to said inductor plate and a cantilever part, subtracting said foot and said cantilever part embedded in the non-magnetic material with which the container is molded once it has solidified. Other preferred features of said means provided for carrying out the method according to the invention are those corresponding to the solutions set forth below:

1.- The anchoring protuberances, which emerge from the insertion face of

The inductor plate at the bottom of the container, are of such length that, in the molding position, they are elastically applied by the end of its cantilever part against the molding face of the conforming half-mold of the concavity of the container.

2.- The anchoring protuberances, which emerge from the insertion face of said inductor plate at the bottom of the container, are of such length that, in the molding position, they are distanced from the molding face of the concavity forming half-mold. of the container. 3.- The inductor plate has a central hole that is complementary to a centering button that emerges from the center of the shaping half-mold of the convex part of said seat bottom.

4.- The conformal half-mold of the convex part of the seat bottom of the container incorporates a creative element of a magnetic field that tends to maintain said inductive plate of ferromagnetic material attached against a recess of the bottom of the forming half-mold of said convex part of the bottom of mold seat during the molding operation of the container.

5.- The anchoring protuberances have anchoring heads, said anchoring head presenting a straight section which, in at least a portion thereof, presents a normal projection on said inductive plate that exceeds the normal projection, on said plate inductor, of the related foot of said anchoring protuberance

6.- In the anchoring protuberances, the related foot and the cantilever part are of the same straight section and have at least one grip between them. 7.- In the anchoring protuberances, the related foot and the cantilever part are of the same straight section and between them a transverse passage is arranged thereto which is occupied in the molding operation by the constituent non-magnetic material of the container.

8.- In the anchoring protuberances, the related foot is coaxial with the cantilever part and both are of equal straight section, the assembly thereof being inclined on the plate and arranged so that each anchoring protuberance has a inclination of different orientation from that of the anchoring protrusions that surround it. 9.- The anchoring protuberances are constituted by irregular centrifugal crowns formed by punctually tearing the material of said inductor plate by means of a punching. 10.- The anchoring protuberances are false with respect to the heat-inducing ferromagnetic plate, the same being

1 1.- The anchoring protuberances, whether false or not, all of them emerge from the same face of the heat-inducing ferromagnetic plate, without transcending in any case to the other side.

12.- The anchoring protuberances are formed in the same heat-inducing ferromagnetic plate, with which they constitute a single piece.

13.- The anchoring protuberances are formed according to triangular flanges with a cantilever vertex partially punched out of the inductor plate.

14.- The anchoring protuberances are partially punched out of said inductor plate and, being the footprint of the die cut in any way, the anchoring protuberance is formed by a flange whose profile is smaller and of a different configuration of said footprint of the die cut, and preferably The tab is an arrowhead, harpoon or similar configuration.

15.- The anchoring protuberances are made of a ferric material. 16.- The anchoring protuberances are made of a non-ferrous material.

17.- The anchoring protuberances are fixed to the ferromagnetic heat-inducing plate by means of a system of the group comprising welding, riveting, nailing, threading and fitting.

18.- The anchoring protuberances are constituted by more than one piece, said parts being interconnectable to each other to constitute a unit assembly insertable in said inductor plate.

Finally, the method for inserting a heat-inducing plate into a cooking vessel and the means used for its implementation lead to the obtaining of a cooking vessel, specifically one consisting of a body that, obtained by molding an non-magnetic material fluidized, it incorporates externally in its bottom an insert constituted by an inductor plate of ferromagnetic material, characterized in that said induction plate is inserted in the bottom of the container constituting with its flat outer face the seat base thereof, and it has on its other side a plurality of anchoring protuberances occluded in the mass of the bottom of said container.

Brief description of the drawings

To facilitate the understanding of the preceding ideas, a preferred embodiment of the invention is described below, referring to the accompanying illustrative drawings. In the drawings:

Figure 1 represents a section of the arrangement of a mole and the bottom of a container that, obtained by molding aluminum, includes an inductor plate as an insert thereof, all in accordance with the patent ES200301776.

Figure 2 represents, in section, a detail of the previous figure in which the form of relationship existing between the bottom of the container and the induction plate insert, materialized by retaining protrusions, is shown. Figure 3 represents, in section and schematically, the general form of related according to the invention between the bottom of the container and the induction plate, according to which the retaining protuberances consist of emerging anchoring protrusions of the inductor plate itself.

Figure 4 represents, in plan, an inductor plate according to the invention, seen from the face that will be in contact with the outer face of the bottom of the container and in which the anchoring protrusions are false to the plate and fungiform.

Figure 5 is a sectional view along line V-V of Figure 4.

Figure 6 represents, in plan, analogously to the case of Figure 4, an inductor plate in which the anchoring protuberances are constituted by die-cutting of the plate itself.

Figure 7 represents a section according to line VII-VII of Figure 6.

Figure 8 represents, schematically, a little more than half parts of the diametral section of the set of the two semi-molds responsible for the molten aluminum forming of the bottom of the cooking vessel and the positioning of the inductor plate in one of them, which It is only retained in the mold by the action of magnetic means and corresponds to the inductor plate of Figures 4 and 5. Figure 9, similarly to the previous figure, represents the case in which the inductor plate, corresponding to that represented in Figures 6 and 7, is retained, mainly, by the anchoring bumps themselves that reach the surface of the semi-mold opposite to the one said inductive plate is attached, without, therefore, the magnetic means have been dispensed with.

Figures 10 to 12, schematically, represent a portion of the inductor plate with as many variants of fungiform protuberance assembly.

Figures 13 to 15 represent, analogously to the previous case, an inductor plate in which it assembles as many variants of mounting of anchoring protuberances constituted by inclined rods.

Figures 16 to 18, schematically, represent the case in which the anchoring protuberances are laminar and have a large opening.

Figures 19 to 21, schematically, represent the case in which the anchoring protrusions being laminar are obtained by die-cutting of the inductor plate itself and are configured to secure its embedment at the bottom of the container.

Figures 22 and 23, schematically, represent another variant of anchoring protuberances of fungiform configuration, in this case asymmetric.

Figure 24 represents, schematically, the case in which the anchoring protuberances are constituted by craters obtained by punching with tearing of the inductor plate.

Figure 25 represents, schematically, the case in which the anchoring protuberances are throat tight.

Figure 26 represents a little more than half of the diametral section of a container obtained according to the arrangement of Figure 9.

Figure 27 represents, on the lower floor, a quadrant of the container of Figure 26.

Figure 28 represents, on the upper floor, the quadrant of the previous figure.

Detailed description of some embodiments of the invention As already stated, figures 1 and 2 correspond to embodiments of the object of patent ES200301776, which have already been described at the beginning of this specification.

Similarly, in Figure 3 the object of the present invention is schematized, which has also been conveniently described above, as in the case of Figures 1 and 2.

Figure 4 shows one of the possible embodiments of the object of the invention, specifically an inductor plate 1, constructed of ferromagnetic material or similar characteristics, which has the surface of its inner face 2A intended to be occluded at the bottom of the container for cooking, provided with a plurality of anchoring protuberances 3A of the false type and fungiform configuration and a central hole 4 for centering thereof in the corresponding half-mold as will be detailed below. As shown in Figure 5, such protuberances have a foot 5, with which they are associated with the inductor plate 1, and a cantilever end part 6 which in this case is differentiated into a head 7 attached to the foot 5 by a short trunk 8. The foot 5 can be joined to the inductor plate 1 by welding (figure 10), by nailing (figure 11) and by threading (figure 12), this enumeration should not be understood as limiting the technical possibilities to be used for such end On the other hand, in Figure 6 another embodiment of the inductor plate is shown

1A, in which, in the same case, a central hole 4 is provided, at the same time that the anchoring protuberances 3B are constituted by forming the material of said inductor plate 1A itself, as it results after a die-cutting operation and formed, as seen in Figure 7, in which the anchoring protuberance 3B results from an angled die cut 9 and the bending of the resulting flange 10, which is bent and arranged inclined with respect to the plane of the inductor plate 1A, with the purpose of preventing the sliding thereof once occluded within the constituent material of the bottom of the container, while, as observed in said figure 6, all the tabs orient their vertex centripetally with respect to the axis of The inductor plate 1A, which prevents the sliding and separation thereof once occluded in said bottom of the container. In both cases represented in Figures 4 to 7 and in which they are followed, the internal face 2A of the inductor plate is the one that has the anchoring protuberances 3A and 3B that will be occluded within the bottom of the container, while The external face 2B thereof, is substantially flat and constitutes the exposed and seating face of said cooking vessel.

Figures 8 and 9 show the shaping half-molds of the concavity 11 and the convexity 12 of the bottom 13 of the cooking vessel in its closed position, including the corresponding inductor plates 1 and 1A, respectively to figures 4 and 6 , having represented a half of them filled with molded non-magnetic material between them to form a cooking vessel and the rest unfilled.

In both figures 8 and 9, the centering button 14, complementary to the centering hole 4 of the inductor plates 1 and 1A, and magnetic means 15 designed to keep said inductor plates firmly attached, are incorporated in the convex forming shaper 12. 1 and 1A against the bottom of the recess 16 provided in said semi-mold.

It can be seen in the aforementioned figures 8 and 9 that the anchoring protuberances 3A and 3B are projected towards the conformed half-mold of the concavity 11, noting that in the case of the anchoring protrusions 3A they are distanced from it without reaching it, while in the case of anchoring protuberances 3B, which are substantially elastic, the vertices of the tabs 10 make contact with said semi-mold, giving the circumstance that in the obtained container may appear, on the inner face of its bottom, points corresponding to the vertices of said tabs 10 and, on the outer face thereof, the portions 17 of non-magnetic material that fills the traces 9 of the die cut.

Obviously, in the case of Figure 9, when the anchoring protuberances 3B are supported on the concavity forming half-mold 11, it can be dispensed with

The action of the magnetic means 15, or use them to retain the inductor plate 1 or 1A in the previous operation of the molding itself. As stated above, Figures 10, 11 and 12 represent different systems of fixing the anchoring protuberances 3A of the fungiform type to the inductor plate 1 of Figure 4. Figure 10 details the fact that allows the embedding of such anchoring protuberances 3A at the bottom 13 of the container, according to which the normal projection of the head 7 of the cantilever part 6 has a diameter D that is greater than the normal projection of the straight section of the trunk 8 of said cantilever part 6, which has a diameter d. This evidences the existence of a step 18 that prevents its sliding in the direction of separating from the bottom 13 of the container, as can be seen in Figure 8.

In Figures 13, 14 and 15, the anchoring protrusions 3C, are constituted by an inclined rod so that the normal projection of the cantilever part 6 does not coincide with the insertion surface of the foot 5 thereof. As detailed in the figures, the largest dimension D of the cantilever part exceeds the dimension d of the insertion surface of the foot 5.

In Figures 16, 17 and 18, the 3D anchoring protuberances are similar to those previously described 3B in relation to Figures 6, 7 and 9 in that they are formed by die-cutting and bending, differing in that the flange 19 of the part in cantilever 6 is neither sharp nor inclined and in that it has a transverse opening 20 through which it will pass in molten material constituting a lock when solidifying.

In this case, the normal projection of the cantilevered part 6 coincides with the insertion surface or foot 5 thereof, without the flange 19 in itself being able to prevent slippage, which does not happen due to the provision of said transverse opening twenty.

Figure 19 shows a special case of the described anchoring protuberances 3B of Figures 6, 7 and 9, according to which the die cut 9 produces a cut 21 and a flange 22 configured in an arrowhead, harpoon, etc.

Figures 20 and 21 show the aforementioned anchoring protuberances 3B already described, it being noted, as detailed in Figure 20, that the anchoring protuberances 3B, specifically its flange 10 of its cantilever part 6, are projected according to a dimension d smaller than the dimension D of the footprint 9 left in the die cut, to which it crosses, the inclination of the tabs 10 being the one that ensures the insertion of the inductor plate 1A in the bottom 13 of the container, as explained in The description of Figures 6 and 7. However, the stability of the insertion of the tabs 10 in the bottom mass 13 can be increased by the formation of non-slip reliefs, on one or both sides of the tabs 10, at the time of die cut These circumstances also apply to the case of anchoring protuberance 3B of Figure 19. In figures 22 and 23, a case of anchoring protrusions 3A formally similar and conceptually equal to those represented in figures 4, 5, 8 and 10 to 12 is shown, with the proviso that the head 7 is eccentric, giving the circumstance that the normal projection of the head 7 has a dimension D greater than the dimension d of the projection of the straight section of the trunk 8, also constituting a step 18.

Figure 24 shows the case in which the anchoring protuberance 3E is formed by punching with puncture tearing of the inductor plate 1A, configuring a crater-shaped projection that forms an irregular centrifugal crown 23, said crown 23 projecting on the surface of the inductor plate 1A surrounding the punching footprint, according to a diameter D greater than the diameter d 'of said footprint 9. In this case the anchoring is carried out both by the concavity of the external wall 24 and by the convexity of the wall internal 25, when the projection 23 remains occluded within the bottom 13 of the container. Figure 25 shows an anchoring protrusion 3F of the false type that is constituted by a trunk 8 and a head 7 between which a stick 26 is formed, the straight section of the latter being of diameter d smaller than the diameter D of the Ia straight section of the trunk 8 and of the head 7 that coincides with that of the foot 5.

In figures 26, 27 and 28, various aspects of a cooking vessel 27 obtained in accordance with the invention and according to the arrangement shown in Figure 9 are shown, in which the bottom 13 is shown in which an insert is inserted inductor plate 1A provided with anchoring protuberances 3B, whose tabs 10 are shown as points 28 on the inner face 13A of the bottom 13, which are visible before performing the operation of applying the non-stick or teflon coating, while on its outer face 13B The face 2B of the inductor plate 1A, the recess 29 of centering and the filling portions 17 of the die traces 9 appears.

Claims

1.- Method for inserting a heat-inducing plate (1, 1A) into the bottom of the seat (13) of a cooking vessel, said method being applied to obtaining a container which, molded in an electromagnetic material, is intended for preferably used in a heat source of the induction type, the seat bottom (13) of said container being molded using at least two forming half molds of said seat bottom (13), said half molds belonging to the same forming mold of said container , where one of said half-molds forms the concave or inner part of said seat bottom (13) while the other half-mold forms the convex or outer part of said seat bottom (13), characterized in that, at the bottom of the active face from! Half-mold forming the convex part of said seat bottom (13), a recess (16) is provided for the fitting of an inductor plate (1, 1A) of ferromagnetic material that is attached to said recess (16) by a (2B ) of its two faces that is substantially flat and should appear as the face seen of said seat bottom (13), ensuring the positioning of said inductor plate (1, 1a) in the mold, during the molding operation of the container, thanks to positioning means (3B, 4, 14, 15) provided in said inductor plate (1, 1A) and / or in said semi-mold forming the convex part of said seat bottom (13), while the other side ( 2A) of said inductor plate (1, 1A), which is intended to be in intimate contact with the non-magnetic material constituting the thickness of said seat bottom (13), is provided with a plurality of anchoring protuberances (3A, 3B , 3C, 3D, 3E, 3F) that project to the active face of said forming half-mold of the concave part of the seat bottom (13) and that in the molding are occluded in the melt of the constituent non-magnetic material of the container to subtract monolithically with it once the container is molded.

2. Method for inserting a heat inductor plate in the seat bottom of a cooking vessel, according to claim 1, characterized in that said anchoring protuberances (3A, 3B, 3C, 3D ₁ 3E, 3F) have a part in cantilever (6) oriented and / or configured so that, subtracting said occluded anchoring protuberances in the solidified mass of the molded non-magnetic material in the fluid state, such cantilever parts (6) prevent the sliding separation of said inductor plate (1, 1A) with respect to said seat bottom (13) of the container.

3. Method for inserting a heat inducing plate into the seat bottom of a cooking vessel, according to claim 2, characterized in that said anchoring protuberances (3A, 3B, 3C, 3D, 3E, 3F) are constituted by provisions of the group comprising those formed by mechanization of the inductor plate itself (1, 1A) and / or the faults incorporated into said inductor plate.

4. Method for inserting a heat inductor plate in the seat bottom of a cooking vessel, according to claim 1, characterized in that said anchoring protuberances (3A, 3C ₁ 3D, 3E, 3F) are projected distantly, without reaching it , towards the active face of said forming half-mold of the concave part of the seat bottom (13) of the container.

5. Method for inserting a heat inductor plate into the seat bottom of a cooking vessel, according to claim 1, characterized in that said anchoring protuberances (3B) of the inductor plate are projected until applied elastically and punctually against the bottom of the active face of said forming half-mold of the concave part of the seat bottom (13) of the container.

6. Method for inserting a heat inductor plate into the seat bottom of a cooking vessel, according to claim 1, characterized in that as positioning means intended to secure the attachment of said inductor plate (1A) at the bottom of said recess (16) of the forming half-mold of the convex part of the seat bottom (13) of the container, elastic protuberances (3B) of the inductor plate (1A) are arranged.

7. Method for inserting a heat inductor plate into the seat bottom of a cooking vessel, according to claim 2, characterized in that as positioning means intended to ensure the attachment of said inductor plate (1A) at the bottom of said recess (16) of the forming half-mold of the convex part of the seat bottom (13) of the container, are arranged, emerging from the bottom of said recess (16), centering means (14) and, arranged in said conductive plate (1 , 1A), means (4) that are complementary to said centering means (14) and that do not interfere with said anchoring protuberances (3A, 3C, 3D, 3E, 3F).

8. Method for inserting a heat inductor plate into the seat bottom of a cooking vessel, according to claim 1, characterized in that as positioning means intended to secure the attachment of said inductor plate (1A) at the bottom of said recess (16) of the conformal half-mold of the convex part of the seat bottom (13) of the container, magnetic actuation arrangements (15) are provided.

9. Method for inserting a heat inducing plate into the seat bottom of a cooking vessel, according to claim 2, characterized in that the normal projection of said cantilever part (6) of the anchoring projections (3A,

3B, 3C) on the plane of said inductor plate (1, 1A) is greater than the normal projection of the rest of said anchoring protuberance (3A, 3B, 3C) on said plane.

10. Method for inserting a heat inducing plate into the seat bottom of a cooking vessel, according to claim 2, characterized in that the normal projection of said cantilever part (6) of the anchoring protuberances (3A, 3B, 3C) on the plane of said inductor plate (1, 1A) does not coincide with the insertion surface of said anchoring boss (3A, 3B, 3C) in said plane of the inductor plate.

11. Method for inserting a heat inductor plate in the seat bottom of a cooking vessel, according to claim 2, characterized in that the normal projection of said cantilevered part (6) of the anchoring protuberances (3D,

3E, 3F) on the plane of said inductor plate (1A) coincides with the insertion surface of said anchoring protuberance (3D, 3E, 3F) in said plane of the inductor plate, while said cantilever part (6) It has a transverse opening (20).

12. Method for inserting a heat inductor plate into the bottom of a cooking vessel, according to claim 2, characterized in that the normal projection of said cantilevered part (6) of the anchoring projections (3B) on the plane of said inductor plate (1A) crosses the footprint left in the latter when forming, by means of said inductor plate (1A) ₁ said anchoring protuberances (3B).

13.- Method for inserting a heat inducing plate into the bottom of a cooking vessel, according to claim 2, characterized in that the normal projection of said cantilever part (6) of the anchoring protuberances (3E) on the plane of said inductor plate (1A) is external to the footprint left in the latter when forming, by tearing with tearing of said inductor plate (1A ), said anchoring protuberances (3E).

14. Method for inserting a heat inducing plate into the seat bottom of a cooking vessel, according to claim 1, characterized in that said non-magnetic material consists of one chosen from the group comprising non-ferrous metal materials, ceramic materials , vitreous materials and synthetic plastic materials, be considered in isolation or in their possible combinations.

15.- Method for inserting a heat inducing plate in the seat bottom of a cooking vessel, according to claim 1, characterized in that the molding operation is one of the group comprising casting, injection and pressing molding, be considered in isolation or in their possible combinations.

16.- Means for carrying out the insertion of a heat-inducing plate (1, 1A) in the seat bottom (13) of a cooking vessel, specifically means that allow a conventional molding operation, carried out by means of conformal half-molds of the concavity and of the convexity of said seat bottom (13), adapts to the method according to claim 1, characterized in that said inductor plate (1, 1A) is a plate of ferromagnetic material which, being flat on the face (2B) that constitutes the outer surface of said seat bottom (13) of the container, has on its other side (2A), with which its union occurs with the non-magnetic material of said seat bottom (13), a plurality of anchoring protuberances (3A, 3B, 3C, 3D, 3E, 3F) that are substantially differentiated, each of them, in a foot (5) from related to said inductor plate (1, 1A) and a cantilever part (6 ), subtracting said foot (5) and said part in voladi zo (6) embedded in the non-magnetic material with which the container is molded once it has solidified.

17.- Means for carrying out the insertion of a heat-inducing plate in the seat bottom of a cooking vessel, according to claim 16, characterized in that said anchoring protuberances (3B), which emerge from the insertion face of said inductor plate (1, 1A) at the bottom of the container, are of length such that, in the molding position, they are elastically applied by the end of their cantilever part (6) against the molding face of the conforming half mold of the concavity of the container.

18. Means for carrying out the insertion of a heat inductor plate in the seat bottom of a cooking vessel, according to claim 16, characterized in that said anchoring protuberances (3A, 3C, 3D, 3E, 3F), which emerge from the insertion face of said inductor plate (1, 1A) at the bottom of the container, are of such length that, in the molding position, they are distanced from the molding face of the shaping half-mold of the container concavity.

19. Means for carrying out the insertion of a heat inductor plate in the seat bottom of a cooking vessel, according to claim 16, characterized in that said inductor plate (1, 1A) has a central hole (4) that It is complementary to a centering button (14) that emerges from the center of the shaping half-mold of the convex part of said seat bottom (13).

20. Means for the realization of the insertion of a heat inducing plate in the seat bottom of a cooking vessel, according to claim 16, characterized in that the semi-mold forming the convex part of the seat bottom of the container incorporates an element (15) creator of a magnetic field that tends to keep said inductive plate (1, 1A) of ferromagnetic material attached against a recess (16) of the bottom of the forming half-mold of said convex part of the bottom of the mold during the molding operation of the container.

21. Means for carrying out the insertion of a heat inducing plate in the seat bottom of a cooking vessel, according to claim 16, characterized in that said anchoring projections (3A) have anchoring heads (7), said anchoring head (7) presenting a straight section which, in at least a portion thereof, presents a normal projection on said inductor plate (1) that exceeds the normal projection, on said inductor plate (1), of the foot of related (5) of said anchoring boss (3A).

22.- Means for the realization of the insertion of a heat inducing plate in the seat bottom of a cooking vessel, according to claim 16, characterized in that, in said anchoring protuberances (3F), the related foot (5 ) and the cantilever part (6) are of equal straight section and have at least one handle (26) between them.

23.- Means for carrying out the insertion of a heat-inducing plate in the seat bottom of a cooking vessel, according to claim 16, characterized in that, in said anchoring protuberances (3D), the related foot (5 ) and the cantilever part (6) are of equal straight section and between them there is a passage (20) transverse to them which is occupied in the molding operation by the constituent non-magnetic material of the container.

24.- Means for the realization of the insertion of a heat inductor plate in the seat bottom of a cooking vessel, according to claim 16, characterized in that in said anchoring protuberances (3C), the related foot (5) It is coaxial with the cantilever part (6) and both are of equal straight section, the assembly being inclined on said inductor plate (1) and arranged so that each anchoring protuberance (3C) has an inclination of different orientation of the Ia which present the anchoring protuberances (3C) that surround it.

25.- Means for the realization of the insertion of a heat inducing plate in the seat bottom of a cooking vessel, according to claim 16, characterized in that said anchoring protuberances (3E) are constituted by irregular centrifugal crowns (23) formed by puncturing the material of said inductor plate (1A) by means of a punching.

26.- Means for the realization of the insertion of a heat inducing plate in the seat bottom of a cooking vessel, according to claim 16, characterized in that said anchoring protuberances (3A, 3C, 3F) are false with respect to said inductor plate (1).

27.- Means for carrying out the insertion of a heat inducing plate in the seat bottom of a cooking vessel, according to claim 16, characterized in that said anchoring protuberances (3A ₁ 3C, 3E) are formed in said plate inductor (1A) with which they constitute a single piece.

28.- Means for the realization of the insertion of a heat inducing plate in the seat bottom of a cooking vessel, according to claim 27, characterized in that said anchoring protuberances (3B) are formed according to triangular flanges (10) with a cantilevered vertex partially punched out of said inductor plate (1A).

29.- Means for carrying out the insertion of a heat inducing plate in the seat bottom of a cooking vessel, according to claim 27, characterized in that said anchoring protuberances (3B) are partially punched out of said inductor plate (1A), the die-cutting footprint being any shape and said anchoring protuberance (3B) being formed by a flange (22) whose profile is smaller and of different configuration of said die cut footprint.

30.- Means for carrying out the insertion of a heat inducing plate in the seat bottom of a cooking vessel, according to claim 29, characterized in that said flange (22) has an arrowhead configuration.

31.- Means for the realization of the insertion of a heat inducing plate in the seat bottom of a cooking vessel, according to claim 16, characterized in that said anchoring protuberances, whether false or not, are all emerging from a same face of said inductor plate without transcending the other face.

32.- Means for carrying out the insertion of a heat inducing plate in the seat bottom of a cooking vessel, according to claim 16, characterized in that said anchoring protuberances are made of a ferric material.

33.- Means for the realization of the insertion of a heat inducing plate in the seat bottom of a cooking vessel, according to claim 16, characterized in that said anchoring protuberances are made of a non-ferrous material.

34.- Means for carrying out the insertion of a heat inductor plate in the seat bottom of a cooking vessel, according to claim 16, characterized in that said anchoring protuberances are fixed to said inductor plate by means of a system of the group comprising welding, riveting, nailing, threading and fitting.

35.- Means for carrying out the insertion of a heat-inducing plate in the seat bottom of a cooking vessel, according to claim 16, characterized in that said anchoring protrusions are constituted by more than one piece, said parts being attachable each other to constitute a unit unit insertable in said inductor plate.

36.- Cooking vessel, specifically one consisting of a body that, obtained by molding a fluidized non-magnetic material, incorporates externally an insert consisting of an inductor plate (1, 1A) of ferromagnetic material, characterized in that said inductive plate (1, 1A) is inserted at the bottom of the container constituting with its flat outer face (2B) the seat base thereof, and has on its other side (2A) a plurality of anchoring protuberances (3A, 3B, 3C, 3D, 3E, 3F) occluded in the bottom mass of said container.