EP3711939A1 - Heizplatte für heizplattenpressen - Google Patents

Heizplatte für heizplattenpressen Download PDF

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Publication number
EP3711939A1
EP3711939A1 EP19205318.9A EP19205318A EP3711939A1 EP 3711939 A1 EP3711939 A1 EP 3711939A1 EP 19205318 A EP19205318 A EP 19205318A EP 3711939 A1 EP3711939 A1 EP 3711939A1
Authority
EP
European Patent Office
Prior art keywords
heated plate
heating
slab
protective layer
press
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP19205318.9A
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English (en)
French (fr)
Inventor
Fabrizio Azzimonti
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ORMAMACCHINE SpA
Original Assignee
ORMAMACCHINE SpA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ORMAMACCHINE SpA filed Critical ORMAMACCHINE SpA
Publication of EP3711939A1 publication Critical patent/EP3711939A1/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/06—Platens or press rams
    • B30B15/062—Press plates
    • B30B15/064—Press plates with heating or cooling means
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/10—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor
    • H05B3/12—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor characterised by the composition or nature of the conductive material
    • H05B3/14—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor characterised by the composition or nature of the conductive material the material being non-metallic
    • H05B3/145—Carbon only, e.g. carbon black, graphite
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/20—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater
    • H05B3/22—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater non-flexible
    • H05B3/28—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater non-flexible heating conductor embedded in insulating material
    • H05B3/286—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater non-flexible heating conductor embedded in insulating material the insulating material being an organic material, e.g. plastic

Definitions

  • the present invention relates to a heated plate for heated plate presses, as well as to a press that comprises such heated plate, which are particularly useful and practical for use in hot molding processes.
  • a first type of heated plate for presses which comprises a heating circuit that comprises wire-like heating elements covered by insulating sheaths.
  • a first slab is conveniently milled, thus obtaining a track inside which the wire-like heating elements are accommodated. This first slab is then fixed on another slab by way of adhesive bonding.
  • Such heated plates of conventional type have a considerable mass and volume with consequent high thermal inertia and they exhibit problems of evenness of heating which are due mainly to the areas where the electrical resistance heaters curve. Furthermore the mechanical strength is conditioned by the quality of the adhesive bonding of the two slabs, which risk being separated when subjected to high concentrated thrusts.
  • substitution of the heating circuit entails high costs and lengthy times and can be carried out only by specialist personnel, since it is necessary to unglue the two slabs that enclose the circuit between them, remove the electrical resistance heaters and all the adhesive used for their application, and finally reapply a new circuit and specific adhesives.
  • a second type of heated plate for presses is known, in which instead of the wire-like heating elements there are sheets provided with electrical resistance heaters, known by the commercial name "etched foil", which are constituted by a printed circuit that comprises materials with an electrical resistance sealed on dielectric backings, such as for example Mylar, Teflon, Kapton etc. Such sheets are applied on the slabs by means of adhesive material.
  • a first drawback consists in that the perfect adhesion of the sheet is achieved only during the step of pressing and then only if there is a substantial operating pressure.
  • a second drawback is linked to the difficulty of maintenance: in fact, when a sheet needs to be substituted, it is necessary to carry out an operation to peel off the sheet from the slab and thoroughly clean the residual glue with specific solvents, in order to then apply the new sheet. This process is very lengthy, and requires specialist personnel and specific adhesives and solvents.
  • a third type of heated plate for presses is also known, in which candle-type electrical heating elements are arranged directly inside the slab, usually constituted by a monolithic slab of steel, inside special holes provided in the slab.
  • a disadvantage of this third conventional type of heated plate consists in that the holes must necessarily be calibrated in order to allow an optimal accommodation of the candle-type heating elements, and therefore it is necessary to carry out a precision mechanical perforation operation with extreme working tolerances, with consequent increase in costs and timescales for carrying it out.
  • Another disadvantage consists in that the slab, in order to withstand the high operating pressures notwithstanding the holes which weaken its structure, usually comprises great thicknesses of steel and as a consequence a considerable mass of metal to be heated, with high levels of thermal inertia and considerable energy costs.
  • this third conventional type of heated plate does not make it possible to have an even distribution of the temperature on the pressing surface, a factor linked to the distribution and the number of candle-type heating elements which, for mechanical reasons, cannot be too high. In fact, making a high number of holes would weaken the structure, and the timescales and the costs for providing the manufactured article would be greater.
  • heated plate presses are also known in which the heating of the plate is carried out by way of a heat transfer fluid, such as for example diathermic oil, water, steam etc.
  • the heat transfer fluid transfers its heat energy to the plate, constituted by a monolithic slab of steel, by flowing through ducts provided in the plate.
  • a further disadvantage of this last type of conventional heated plate presses consists in that they necessitate apparatuses for the heating and transmission of the heat transfer liquid, such as boilers, electric heaters, pumps, motors, plumbing systems etc., and corresponding ancillary electronic control systems, which appreciably increase the complexity and costs of implementation and of maintenance and, in addition, reduce the energy efficiency. Last but not least, the ordinary and extraordinary maintenance is very demanding and costly.
  • the aim of the present invention is to devise a heated plate for heated plate presses which is capable of solving the above mentioned problems, eliminating the drawbacks and overcoming the limitations of the known art.
  • an object of the present invention is to provide a heated plate for heated plate presses that has a better energy efficiency than the background art.
  • Another object of the invention consists of providing a heated plate for heated plate presses that has reduced heating times compared to the background art.
  • Another object of the invention consists of providing a heated plate for heated plate presses that makes it possible to have a very even distribution of heat if compared to the known art.
  • Another object of the invention consists of providing a heated plate for heated plate presses that is easier to implement and economically competitive when compared to the known art.
  • Another object of the invention consists of providing a heated plate for heated plate presses that requires less and simpler maintenance when compared to the known art.
  • Another object of the invention consists of providing a heated plate for heated plate presses that is less subject to malfunctions and deterioration.
  • the heated plate generally designated by the reference numeral 10
  • a heated plate press 100 With reference to the figures, the heated plate, generally designated by the reference numeral 10, is intended to be installed in a heated plate press 100, with a peculiar method which will be described in detail below.
  • heated plate indicates the assembly that comprises the slab 2 that is heated and the corresponding system of heating associated with it.
  • the heated plate 10 that comprises a slab 2, preferably a sized slab of material with high heat conductivity, such as for example an alloy of steel or of aluminum or other conventional metallic material with high thermal conductivity.
  • the slab 2 comprises a working surface 29 which in practice is the surface that is adapted to come into contact with the material to be pressed and which, when the plate is installed in a press 100 (such as for example in Figure 10 ), it is exposed and directed toward the pressing area A.
  • the slab 2 also comprises a rear surface 28, opposite and parallel to the working surface 29, which is the surface that is adapted to be in contact with the heating modules 1A, 1B which will be described below.
  • the internal surface 28 is flat and preferably is made, using conventional gauging techniques, so as to have a high degree of flatness.
  • the working surface 29 and the rear surface 28 are therefore the two larger surfaces of the slab 2 which, in the example shown, is substantially rectangular in plan.
  • the heated plate 10 comprises one or more heating modules 1A, 1B which comprise at least one carbon electric circuit 11, which is configured to heat at least one heating face 19 of such heating module 1A, 1B.
  • the heating modules 1A, 1B are substantially parallelepiped in shape and the heating face 19 is constituted by one of the greater faces of the parallelepiped. More generally, the heating face 19 preferably comprises a flat surface that is adapted to be placed against the rear surface 28 of the slab 2.
  • the heating face 19 therefore is also flat and preferably is made, using conventional gauging techniques, so as to have a high degree of flatness, so as to be able to perfectly fit against the rear surface 28 of the slab 2.
  • Such one or more heating modules 1A, 1B are configured to be arranged with the heating face 19 adjacent to the internal surface 28 of the slab 2 and in thermal communication with this, so as to heat the slab 2 when the at least one carbon electric circuit 11 is passed through by an electric current.
  • the term "in thermal communication” means functionally connected so as to be able to mutually exchange heat, i.e. two elements described as being “in thermal communication” means they are capable of exchanging heat either directly (by conduction, irradiation or convection) or indirectly (by being physically connected via a thermal conductor).
  • the heating modules 1A, 1B are configured to be arranged in direct contact with the internal surface 28 of the slab 2 so as to heat the slab 2 at least by direct conduction.
  • At least one carbon electric circuit 11 is arranged inside each heating module 1A, 1B, adjacent to the heating face 19 and in thermal communication with this, so that when the carbon electric circuit 11 is heated by the flow of electric current it results in the heating of the heating face 19.
  • each carbon electric circuit 11 comprises carbon fibers (or filaments) 111 which are arranged substantially along a plane that is substantially parallel to the heating face 19 and is connected electrically, in a known manner, with at least two electrical connectors 112 that are adapted to be connected to an electric power supply circuit.
  • electrical connectors 112 can be, for example, electrical cables or extensions of the carbon fibers or terminals or the like and, as shown in Figure 1 , they exit from the heating modules 1A, 1B so as to be connectable to a source of electricity, such as for example a power supply circuit of the press 100 on which the heated plate 10 is installed.
  • the carbon fibers 111 form a plurality of electrical conducting wires or lines that are connected in series and/or in parallel and which, in a known manner, produce heat when an electric current is applied to the electrical connectors 112.
  • the carbon fibers 111 are substantially straight and can be arranged close together, so that the carbon circuit 11 can be arranged uniformly along the entire surface of the heating face 19, thus ensuring a very even distribution of heat, and as a consequence heating the slab 2 in a very even manner.
  • the heating module 1A is a single heating module
  • the heating module 1B is a multiple heating module which comprises a plurality of individual component modules 1B' coupled together.
  • each individual component module 1B' comprised in the multiple heating module 1B is wholly similar to the single heating module 1A; therefore from this point onward only the single heating module 1A will be described in more detail (from this point onward, simply "heating module 1A"), implying that the characteristics described are common also to each individual component module 1B'.
  • a heating module 1A, 1B be it single or multiple, can have different dimensions according to requirements and a single heated plate can comprise heating modules that have different dimensions (for example width).
  • each heating module 1A comprises a single carbon electric circuit 11, in other embodiments a single heating module 1A comprises a plurality of carbon electric circuits 11; in general there can be any number of carbon electric circuits 11 comprised in a heating module 1A, according to requirements.
  • each of the heating modules 1A, 1B comprises a plurality of layers 12, 13, 14, 15, 16, 17 which are substantially parallel to the heating face 19 (see Figures 3 , 7 and 8 ).
  • such layers 12, 13, 14, 15, 16, 17 comprise at least one first protective layer 12, and a second protective layer 13 and the at least one carbon electric circuit 11 is interposed between such first protective layer 12 and such second protective layer 13, the function of which is to protect and insulate the carbon electric circuit 11.
  • both the first protective layer 12 and the second protective layer 13 comprise, or are constituted by, an adhesive made of silicone resin for high temperatures, which is resistant to the operating temperatures of the heated plate 10, has high mechanical strength, and is configured to protect and electrically insulate the carbon electric circuit 11.
  • the first protective layer 12 and the second protective layer 13 are in practice in contact with the carbon electric circuit, enclosing it between them.
  • the layers 12, 13, 14, 15, 16, 17 also comprise a first interface layer 17, which is arranged on the first protective layer 12, externally with respect to the carbon electric circuit 11, and which preferably comprises glass fabric impregnated with a resin, preferably acrylic resin (for example being constituted by a sheet of glass fabric impregnated with resin).
  • a resin preferably acrylic resin (for example being constituted by a sheet of glass fabric impregnated with resin).
  • the heating face 19 referred to previously is in practice constituted by an external surface of this first interface layer 17.
  • the above mentioned plurality of layers 12, 13, 14, 15, 16, 17 further comprises at least a third protective layer 15 and a thermal insulation layer 14 which is arranged between the second protective layer 13 and the third protective layer 15.
  • the third protective layer 15 also comprises, or is constituted by, an adhesive made of silicone resin for high temperatures and with high mechanical strength.
  • the layers 12, 13, 14, 15, 16, 17 also comprise a second interface layer 16, which is arranged on the third protective layer 15, externally with respect to the carbon electric circuit 11, and which preferably comprises glass fabric impregnated with a resin, preferably acrylic resin (for example being constituted by a sheet of glass fabric impregnated with resin) and which in practice constitutes an external face of the heating module 1A on the opposite side with respect to the heating face 19.
  • a resin preferably acrylic resin (for example being constituted by a sheet of glass fabric impregnated with resin) and which in practice constitutes an external face of the heating module 1A on the opposite side with respect to the heating face 19.
  • the thermal insulation layer 14 comprises a material with low thermal conductivity, such as for example a felt and/or polyester and/or expanded PET (polyethylene terephthalate or polyethylene terephthalate) preferably the thermal insulation layer 14 is constituted by non-combustible felt resistant to high temperatures.
  • a material with low thermal conductivity such as for example a felt and/or polyester and/or expanded PET (polyethylene terephthalate or polyethylene terephthalate) preferably the thermal insulation layer 14 is constituted by non-combustible felt resistant to high temperatures.
  • the heating modules 1A, 1B can be provided by way of presses which, by way of special gauges, make it possible to obtain a high precision of flatness of the heating module 1A, 1B, in particular a high flatness of the heating face 19.
  • the heated plate 10 preferably also comprises a plurality of longitudinally extended supporting elements 4, such as for example bars or metallic profiles with a quadrangular cross-section, which are fixed to the rear surface 28 of the slab 2 and are provided with fixing seats 41 (for example threaded holes) which are adapted to be engaged by fixing elements 32 (such as for example screws or the like) in order to provide the mechanical connection (or the fixing) of the heated plate 10 to a press 100 and/or to a mechanical fixing apparatus 101.
  • the supporting elements 4 are positioned in an internal (i.e. non-perimetric) region of the rear surface 28 of the slab 2 and are arranged longitudinally, parallel to the longer edge of the rear surface 28. In the example shown the supporting elements 4 are two in number.
  • the heated plate 10 also comprises supplementary connecting elements 5, such as for example metallic tubes or profiles, which are also fixed to the slab 2, for the functional connection or mechanical coupling with parts of a press 100 or with further elements or devices that may be necessary for the operation of the press 100.
  • supplementary connecting elements 5 such as for example metallic tubes or profiles, which are also fixed to the slab 2, for the functional connection or mechanical coupling with parts of a press 100 or with further elements or devices that may be necessary for the operation of the press 100.
  • the heated plate 10 can be configured in a working configuration, in which the one or more heating modules 1A, 1B are mechanically fixed to the slab 2 with the heating face 19 adjacent to and in thermal communication with the rear surface 28 of the slab 2, so that the one or more heating modules 1A, 1B heat the slab 2 when the at least one carbon electric circuit 11 is passed through by an electric current.
  • the heating face 19 is fixed in direct contact with the rear surface 28 of the slab 2.
  • the latter adheres perfectly to the internal surface 28 of the slab 2 which is also perfectly flat, thus ensuring an efficient heat exchange.
  • the heated plate 10 also comprises filling elements 9 which are adapted to add thickness (so as to compensate the difference in thickness between the heating modules 1A, 1B and the supporting elements 4 so as to fill, in the working configuration, the empty spaces) and to contain the heating modules 1A, 1B in the working configuration.
  • the filling elements 9 comprise one or more materials that are adapted to fill the empty spaces, by adding thickness, and which are preferably insulating, such as for example wood fiber (MDF), PET or chipboard.
  • MDF wood fiber
  • PET chipboard
  • each heating module 1A, 1B distally with respect to the slab 2) of each heating module 1A, 1B, on the external face of the heating modules 1A, 1B on the opposite side to the heating face 19, so as to compensate for the difference in thickness between the heating modules 1A, 1B and the supporting elements 4 so as to fill the empty spaces.
  • a preferred method with which the mechanical fixing of the heating modules 1A, 1B to the slab 2 is obtained will be illustrated in detail further below, with the description of a press 100 that comprises the heated plate 10; in fact, in the preferred embodiments, the working configuration is obtained when the heated plate 10 is functionally fixed to a press 100 (i.e. installed in a press 100 in its operating condition).
  • the heating modules 1A, 1B all have a length that is substantially equal to the length of the slab 2 and the heated plate 10 comprises a number of heating modules 1A, 1B that is such as to cover substantially the entire internal surface 28 of the slab 2 (except for the portions covered by the supporting elements 4 and by the supplementary connecting elements 5).
  • the heating modules 1A, 1B which have reduced width and are positioned peripherally, and one heating module 1B which has greater width and is positioned at the center of the heated plate 10.
  • the carbon electric circuits 11 of all the heating modules 1A, 1B that are present on the individual heated plate 10 are conveniently mutually connected so as to form a single electric circuit that heats all the heating modules 1A, 1B simultaneously when electrically powered.
  • the number and the dimensions of the heating modules 1A, 1B comprised in a heated plate 10 are chosen in such a way as to cover the entire internal surface 28 of the slab 2.
  • the present invention also relates to a heated plate press 100 which comprises at least one heated plate 10 like the one just described, and more precisely a heated plate 10 configured in the active condition, and a press structure 99 to which the heated plate 10 is fixed or at least mechanically connected.
  • the press 100 can be of any conventional type and the press structure 99 should be understood, very generally, to be the set of conventional elements that make up the press 100 except for the heated plate 10 and the mechanical fixing apparatus 101, which will be described below.
  • the press structure 99 for example, can comprise a frame or a supporting structure 991, pistons and/or levers for moving one or more plates including the heated plate 10 and optional actuators, electronic control devices, and any other element necessary to the operation of the press 100, in accordance with the background art.
  • FIGS 9 and 10 partially and schematically illustrate a generic and non-limiting embodiment of a press 100 according to the invention, in which two heated plates 10 are comprised which are positioned parallel to each other and fixed to respective piston actuation systems 992 which are configured to push the two heated plates 10 against each other.
  • the press 100 preferably comprises at least one heated plate 10 which comprises a plurality of supporting elements 4 described previously (i.e. the supporting elements 4 fixed to the rear surface 28 of the slab 2 and provided with fixing seats 41 adapted to be engaged by fixing elements 32 in order to provide the mechanical fixing of the heated plate 10 to the press 100), the adapted filling elements 9, and a mechanical fixing apparatus 101 for fixing the heated plate 10.
  • a heated plate 10 which comprises a plurality of supporting elements 4 described previously (i.e. the supporting elements 4 fixed to the rear surface 28 of the slab 2 and provided with fixing seats 41 adapted to be engaged by fixing elements 32 in order to provide the mechanical fixing of the heated plate 10 to the press 100), the adapted filling elements 9, and a mechanical fixing apparatus 101 for fixing the heated plate 10.
  • the mechanical fixing apparatus 101 comprises at least one fixing element 32, such as for example a screw or a bar with a threaded end 321 or a shank, which engages the fixing seat 41 so as to mechanically fix the slab 2 to the press structure 99.
  • fixing element 32 such as for example a screw or a bar with a threaded end 321 or a shank, which engages the fixing seat 41 so as to mechanically fix the slab 2 to the press structure 99.
  • the mechanical fixing apparatus 101 further comprises a pusher 31, which preferably comprises one or more springs 38 or other elastic elements.
  • a pusher 31 pushes an abutment element 33, such as for example a tubular element (or a bar or a plate), toward the heating modules 1A, 1B which are positioned on the rear surface 28 of the slab 2, in the direction of that slab 2.
  • the abutment element 33 pushed by the pusher 31, consequently pushes the heating modules 1A, 1B against the rear surface 28 of the slab 2 so as to make the heating face 19 of the heating modules 1A, 1B adhere to the rear surface 28 of the slab 2.
  • the filling elements 9 are interposed between the abutment element 33 and the one or more heating modules 1A, 1B, and even more preferably one or more protection and insulation elements 35, 36 which comprise for example an element made of wood fiber are also interposed between them; in this case the abutment element 33, pushed by the pusher 31, pushes the protection and insulation elements 35, 36 and the filling elements 9, which, in turn, push the heating modules 1A, 1B against the rear surface 28 of the slab 2.
  • the fixing element 32 comprises a first threaded end 321 which engages a respective fixing seat 41 so as to be fixed to the slab 2, and a second end 322 fixed to the press structure 99 (for example to a supporting plate comprised in the press structure 99).
  • the fixing element 32 is arranged perpendicular to the slab 2 and transversely passes through the abutment element 33, which is arranged parallel to the slab 2 on the side of the internal surface 28, through a through hole which is provided in the abutment element 33.
  • the pusher 31 comprises a spring 38, positioned coaxially to the fixing element 32, on the opposite side of the abutment element 33 with respect to the slab 2, between the abutment element 33 and the second end 322 of the fixing element 32; such spring 38 is compressed between the abutment element 33 and an annular shoulder 39 of the fixing element 32, so as to push the abutment element 33 along the longitudinal axis Y of the fixing element 32 in the direction of the rear surface 28 of the slab 2.
  • the protection and insulation elements 35, 36 comprise spacing elements 35, which in the example shown are substantially U-shaped with the flat base adjacent to the heating modules 1A, 1B and the concavity directed toward the abutment element 33, which are positioned mutually spaced apart and so as to maintain an empty space V between the heating modules 1A, 1B and the abutment element 33.
  • a protective layer 36 such as for example a slab of wood, is also interposed between the spacing elements 35 and the heating modules 1A, 1B.
  • the mechanical fixing apparatus 101 comprises two or more pushers 31 which act on a same abutment element.
  • the press 100 comprises two or more mechanical fixing apparatuses 101 for each heated plate 10.
  • the mechanical fixing apparatus 101 (comprising the fixing element 32, the pusher 31, the abutment element 33 and optionally the protection and insulation elements 35, 36) has up to this point been described as being comprised in a press 100, it is possible to provide, independently of the press 100, a heated plate 10, according to the invention, which itself comprises such mechanical fixing apparatus 101 (for which what is described above applies and which in such embodiments should be considered part of the heated plate 10 and not of the press 100) the function of which is to maintain the heated plate 10 in the working configuration as described previously and optionally also to fix the heated plate 10 to a preexisting press 100.
  • a heated plate assembly 10 and a fixing apparatus 101 such as for example the one shown in Figure 11 , which can optionally, but not necessarily, be configured to be coupled to a preset press 100.
  • the assembly does not require the use of glues or adhesives.
  • the heated plate 10 is characterized by a reduced metallic mass to be heated and by a very efficient heat exchange, factors that make it possible to bring the heated plate 10 to the working temperature faster than in the known art, and also to use less electricity.
  • carbon circuits 11 have a slower rate of deterioration and greater resistance to discontinuous use than the electrical circuits usually used in the background art.
  • Carbon circuits 11 also have reduced thickness and are very light, with respect to the electrical circuits usually used in heated plate presses, and they are easy to provide using conventional methods.
  • the electricity required to power the carbon circuits 11 is appreciably less than that required in conventional "energy saving" systems.
  • maintenance is very simple, in that it is possible to remove the heated plate 10 and substitute even just one heating module 1A, 1B via a straightforward mechanical operation, such as for example unscrewing the fixing element 32.
  • the heated plate achieves the intended aim and objects in that it makes it possible to have a better energy efficiency than the background art.
  • Another advantage of the heated plate, according to the invention consists in having a reduced heating time compared to the background art.
  • Another advantage of the heated plate, according to the invention consists in having a very even distribution of heat compared to the known art.
  • Another advantage of the heated plate, according to the invention consists in that it is easy to implement and economically competitive when compared to the known art.
  • Another advantage of the heated plate, according to the invention consists in that it requires less and simpler maintenance, when compared to the known art.
  • Another advantage of the heated plate, according to the invention consists in that it is less subject to malfunctions and deterioration.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Press Drives And Press Lines (AREA)
EP19205318.9A 2019-03-19 2019-10-25 Heizplatte für heizplattenpressen Withdrawn EP3711939A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT102019000003939A IT201900003939A1 (it) 2019-03-19 2019-03-19 Piano riscaldato perfezionato per presse a piano riscaldato.

Publications (1)

Publication Number Publication Date
EP3711939A1 true EP3711939A1 (de) 2020-09-23

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ID=67002178

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19205318.9A Withdrawn EP3711939A1 (de) 2019-03-19 2019-10-25 Heizplatte für heizplattenpressen

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Country Link
EP (1) EP3711939A1 (de)
IT (1) IT201900003939A1 (de)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE477351A (de) * 1941-07-04 1947-12-31
US5158132A (en) * 1989-03-20 1992-10-27 Gerard Guillemot Zone-regulated high-temperature electric-heating system for the manufacture of products made from composite materials
WO2013034137A2 (de) * 2011-09-08 2013-03-14 Npc-Meier Gmbh Formpresse/laminator
DE202006021279U1 (de) * 2006-12-07 2014-08-18 Fibretemp Gmbh & Co. Kg Formwerkzeug für die Herstellung von Bauteilen aus Faserverbundstoffen
DE102013105401A1 (de) * 2013-04-15 2014-10-16 Qpoint Composite GmbH Bearbeitungswerkzeug zum thermischen Bearbeiten von Bauteilen und Bearbeitungsverfahren
DE102015010000A1 (de) * 2015-07-31 2017-02-02 Diehl Aircabin Gmbh Werkzeugvorrichtung zur Fertigung von Bauteilen sowie Verfahren zur Fertigung der Werkzeugvorrichtung

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE477351A (de) * 1941-07-04 1947-12-31
US5158132A (en) * 1989-03-20 1992-10-27 Gerard Guillemot Zone-regulated high-temperature electric-heating system for the manufacture of products made from composite materials
DE202006021279U1 (de) * 2006-12-07 2014-08-18 Fibretemp Gmbh & Co. Kg Formwerkzeug für die Herstellung von Bauteilen aus Faserverbundstoffen
WO2013034137A2 (de) * 2011-09-08 2013-03-14 Npc-Meier Gmbh Formpresse/laminator
DE102013105401A1 (de) * 2013-04-15 2014-10-16 Qpoint Composite GmbH Bearbeitungswerkzeug zum thermischen Bearbeiten von Bauteilen und Bearbeitungsverfahren
DE102015010000A1 (de) * 2015-07-31 2017-02-02 Diehl Aircabin Gmbh Werkzeugvorrichtung zur Fertigung von Bauteilen sowie Verfahren zur Fertigung der Werkzeugvorrichtung

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