• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a baking plate for baking ovens for the production of baked products such as waffles, crunchy waffles, pancakes and the like, characterized in that the baking plate (9, 10) has a carrier plate (11, 12) and one or more baking inserts (25) arranged thereon. has, which are designed to receive the dough to be baked and that the baking inserts (25) are formed of sintered ceramic with high toughness and low thermal expansion.
    公开号:AT511851A1
    申请号:T1190/2011
    申请日:2011-08-18
    公开日:2013-03-15
    发明作者:
    申请人:Franz Haas Waffel Und Keksanlagen Ind Gmbh；
    IPC主号:
    专利说明:

    fc 30 ^ 239
    Pe / GA
    Baking plate for ovens
    The invention relates to baking plates for ovens for the production of bakery products such as soft waffles, crunchy waffles, pancakes and the like. Such baking ovens in the embodiments for the industrial production of baked products usually include an input station, a baking chamber, an output station and a conveyor for the baking plates, which are arranged along an orbit leading through the oven. Ovens of this type are used for the production of very different products. One product group includes pancakes, pancakes, etc. Another product group includes soft waffles, american pancakes, canadian pancakes, etc. Another product group includes crispy brittle waffles, such as coconut pancakes. crunchy-brittle wafer sheets, crispy-brittle flat wafers containing numerous hollow body halves, etc. Furthermore, such ovens can also be used for the production of waffle baking technology produced packaging parts such as leaves, cups, trays, etc. Furthermore, there are still product groups with crispy-brittle waffles, which are made in the baking warm state plastically deformable flat waffles, which are formed in the backwarm state in hollow body and then allowed to solidify as a hollow body.
    In such ovens, the heat required for the baking process in the oven can be generated in various ways, for example by gas heating, electric heating or electrical induction.
    For ovens and the associated baking plates, it is important to ensure the optimum baking conditions over as long a period as possible and over the entire running time of the oven. For the baking process, a constant amount of heat must be supplied to the dough, the bakery products must be made accurately for many applications and the bakery product and any rejects next to the bakery products must be easily removable and removable at or after the sampling station. In particular, the removal of miss-baked products and soils presents a problem in conventional baking plates, which are usually made of gray cast iron with a machined and possibly tempered surface. A non-removed or non-removable contaminant may cause any subsequently baked baked products 2 • ··· · · · » · * · · *
    Pe / GA unusable, which usually leads to a standstill of the oven and associated production interruption.
    To avoid these difficulties, it has previously been proposed to form the surface of baking plates in such a way that the dough and the baked products formed therefrom can be detached from the surface again as easily as possible. DE 42 08 382 A1 shows the coating of baking plates for baking Waffelblättem, wherein the baking plate made of steel or cast steel and is provided with a smooth food safe ceramic topcoat. Furthermore, it is disclosed there to provide a food-safe plastic layer over the ceramic cover layer. However, such a large-area coating is disadvantageous. On the one hand, a large-scale ceramic coating of metal plates in the production is problematic. This applies both in terms of dimensional accuracy and stability of the ceramic surface. In operation, it comes in an oven to chipping ceramic coatings and formation of committee. Furthermore, the additional coating with food-safe plastic is counterproductive, since it will lose the possibly achievable advantages of a ceramic surface. Moreover, the cited document gives no information on the nature of the ceramic layer. In this regard, the disclosure is incomplete.
    Furthermore, it has long been known to form cakes of ceramic, which are usually clay ceramics. Such ceramic utensils, which have been known for millennia, are completely unusable for an industrial baking process.
    DE 60 2004 000 582 T2 describes a baking mold with a ceramic non-stick coating, which is a bread maker. The non-stick coating is a sintered at low temperatures ceramic layer, which is applied to a thin-walled baking tin made of metal.
    If the ceramic layer is damaged, the entire baking pan must be discarded. A pressure load by the dough can not be absorbed by such baking molds, which is not necessary in non-pressure baking bread. Also, this document gives no indication of the nature of the sintered material, so that 3
    ... *;. ^ 23 # Pe / GA in this respect the revelation is incomplete. The revealed bread baking mold gives no suggestion how a baking plate for the waffle production should be formed.
    The described disadvantages of the prior art are to be eliminated according to the present invention. In particular, a baking plate for industrial ovens is to be created, in which the baked product can be easily and safely removed completely after the baking process and wherein in the subsequent purification steps such. the blow-out with compressed air to safely remove all residues. Surface treatments such as greases or additional coatings should be avoided. Furthermore, a conversion of the baking plate or any repair should be easily and quickly possible. Furthermore, it is a goal to make the baking inserts so that the heat transport is ensured within the baking plate to the dough evenly and with sufficient speed.
    The baking plate mentioned at the outset is characterized in that the baking plate has a carrier plate and one or more baking inserts arranged on it, which are designed to receive the dough to be baked, and in that the sintered ceramic baking inserts are formed with high toughness and low thermal expansion. The baking inserts are preferably inserted into insertion recesses of the carrier plate and the carrier plate is formed from a material, preferably metal, particularly preferably gray cast iron, whose thermal expansion is equal to or greater than the thermal expansion of the baking inserts. The jaw inserts can have a thermal expansion coefficient α < 9 [10'6 x k'1] and the support plate has a thermal expansion coefficient α > 9 for the temperature range 20 to 200 ° C. The baking inserts preferably have a thermal expansion coefficient of about 3.2 and the carrier plate has a thermal expansion coefficient of about 12.5.
    The baking inserts according to the invention are preferably formed from silicon nitride or silicon carbide, more preferably from gas pressure sintered silicon nitride of the Al / Y type.
    According to further features, the insertion recesses may be formed in the support plate for receiving the back inserts with little play, so that the jaw inserts are accurately inserted and removed again. Furthermore, the baking inserts on the baking surface side with the desired for the baked product
    4: st > * 239 Pe / GA · «« · · · # »» · · »
    Oberflächengestattung and a circumferential sealing rib, and be provided with a circumferential side edge. The jaw inserts are preferably held in the insertion recesses by tabs which are fixed to the carrier plate, preferably by bolts, and arranged over the side edge of the jaw inserts. The side edge has an edge recess for each tab, with at least two, preferably three or four, tabs and edge recesses being provided for each back insert. The tabs may be formed of metal, preferably stainless steel.
    According to further features of the invention, each insertion recess has a vent hole. The baking plates of a baking tongs can be arranged in each case a support frame, wherein the lower and upper support frame are connected to each other via a hinge.
    Furthermore, the baking plate can be part of a baking-sheet tongs having a lower and an upper baking plate, with their baking inserts arranged opposite one another, so that after closing the baking tongs between the associated baking inserts the space for the dough and for the baked product formed therefrom is formed , Furthermore, the invention is also in the creation of a baking oven with a leading through the oven orbit for the baking pans and a conveyor for the baking plates, wherein one or more of the aforementioned features.
    The invention will be described in more detail by way of example in the following.
    Fig. 1 is a schematic side view of a baking oven, as it can be used here.
    Fig. 2 shows a baking tong in the open state in an oblique view
    Fig. 3 shows the top view of the baking surface of a lower baking plate and the
    4 and 5 show sectional views according to the sections A-A and B-B in Fig. 3rd
    Fig. 6 shows the top view of the baking surface of an upper baking plate and the
    7, 8 show sectional views along the section lines A-A, B-B in FIG. 6.
    FIG. 9 shows a representation of the lower baking plate with partially inserted baking inserts and partially empty insertion recesses.
    5 • < * · 5δ & 3 & * Pe / GA
    Fig. 1 shows a baking oven 1 for the production of baked shaped bodies, which are formed for example as soft waffles. The soft wafers are made of a liquid waffle dough in baking molds, each consisting of a lower baking mold and an upper baking mold formed according to the invention by baking inserts in the baking plates, as will be shown later.
    The baking molds are received in the baking tongs 3 of an endless baking tong chain 4. The baking tong chain 4 is arranged along a circulation track which extends through the oven 1 in two horizontal transport paths 5, 6 arranged one above the other. The baking tong chain 4 is integrated in a chain conveyor arranged along the orbit, which conveys the baking tongs 3 through both transport paths 5, 6 and deflects them from one transport path into the other via its chain wheels arranged at the front and rear ends of the oven 1. A more detailed description of such ovens is e.g. WO / 2009/100873.
    The chain conveyor is arranged in the elongate furnace frame 7 of the oven 1 between side walls of the oven frame 7. The baking tongs 3 are arranged in the chain conveyor between two lateral transport chains and attached to their link plates. Of the transport chains are to the outside before hinge pins on which wheels are rotatably mounted, with which the chain conveyor is supported in both transport paths in each case extending in the oven longitudinal rails, which are attached to the two side walls of the oven rack 7.
    In the front oven half 2, an output station 18, an input station 19 and a device 20 for opening and closing the baking tongs 3 are arranged on the upper transport path 5. In the dispensing station 18, the soft wafers are removed from the opened baking tongs 3. In the input station 19, waffle dough, e.g. liquid or introduced as a solid dough in the open baking tongs 3. After the input station 19, the baking tongs 3 are closed by the device 20 again. The closed baking tongs 3 are conveyed by the chain conveyor in the upper transport path 5 to the rear to the rear end of the oven 1 and in the lower transport path 6 forward to the front end of the oven 1.
    6:::: seiso. In the rear oven half 8, the baking chamber 21 of the oven * 1 is provided. In the baking chamber 21, an upper baking zone 22 is arranged on the upper transport path 5, and a lower baking zone 23 is arranged on the lower transport path 6.
    2 shows a baking tong 3 according to the invention, as it can be used in an oven according to FIG. 1 or in other ovens. The baking tong 3 comprises a lower baking plate 9 and an upper baking plate 10. The two baking plates each comprise a carrier plate, namely the lower carrier plate 11 and the upper carrier plate 12. The carrier plates 11, 12 are clamped in support frames 13, 14, which are connected via the hinge 15 are foldable. Shown is the open position of the baking tongs and in this position the dough can be applied to the lower baking plate or the finished baked product can be removed after passing through the baking chamber. When opened, the baking tongs are e.g. cleaned with compressed air from any residues. For the roles of the baking tongs in the composite of the baking tongs chain two rollers 16 are provided on both sides of the baking tongs, of which in Fig. 2, only one roller is visible. The control of the folding movement of the baking tongs via the control roller 17 on the upper baking plate, which is controlled by the means 20 for opening and closing.
    As can already be seen in Fig. 2 and shown in detail in Figs. 3 to 9, the support plates 11, 12, e.g. is formed from a solid gray cast iron plate or steel plate, insertion recesses 24, in which the baking inserts 25 are used. The insert recesses and the Backeinsätze are mutually formed with little or no play, so that the jaw inserts are accurately used and preferably also be removed again. Each baking insert has on the baking surface side 33 the desired surface texture for the respective baked product and a peripheral sealing rib 26. The area within the sealing rib forms the baking mold 34 for receiving the dough. Extending outwardly in each case is a peripheral side edge 27, which lies largely flat in the back surface side of the carrier plate 11, 12. Held are the jaw inserts 25 by tabs 28 which are screwed by means of bolts 29 to the support plate and engage in an edge recess 30 of the jaw insert. The tabs 28 are 7
    : i. **. *: 5623 $. pe / GA * · «* ·· · > · Further sinks also in corresponding recesses 31 of the Yrä'gerplatte, so that a total of a largely flat surface is generated.
    In the illustrated embodiments, each jaw insert is held in place by four tabs. Depending on the spatial and physical requirements and two or three tabs can be sufficient or more tabs can be provided.
    If, in the baking plates according to FIGS. 3 to 9, different baking pans are shown on a carrier plate, namely a series of round baking pans and a series of square baking pans, this is only intended to illustrate that the shape of the baked product and the associated baking pans can be chosen as desired. In practical use, it will be advantageous to provide only a spatial design of the baking molds for all baking tongs on the same baking tongs chain.
    The upper back plate shown in Figures 6 to 8 is substantially the same design as the lower baking plate according to Figures 3 to 5. Here is different the engraving of the baking mold, which protrudes in the upper baking plate against the baking surface side of the support plate, whereas the baking mold according to the Figures 4 and 5 springs back. By this difference, the required for the baking process interior design of the closed baking mold is formed, which receives the dough and the baked product. The design of the baking mold can be adapted to any requirements and therefore deviate from this embodiment.
    As can be seen in particular from FIG. 9, the insertion recesses 24 have ventilation holes 32 which, on the one hand, facilitate the insertion of the precisely formed jaw inserts and, on the other hand, also give the possibility of pressing the jaw inserts out of the recess with a rod-shaped tool and thus of giving the possibility to replace defective backsets or to convert the backplate to other backsets. For the good heat transfer from the solid support plate to the baking insert, it is advantageous if its shape is exactly adapted to the insertion recess, so that all lying in the support plate surfaces of the baking insert to the
    : :: ». ··· * *: 50239 Pe / GA * · fr · · 4 > 1 · · corresponding surfaces of the unit housing. Furthermore, it can be advantageous if the wall thicknesses of the bag inserts are small, in particular those of the bottom surface 34.
    The outer contour of the baking inserts may also be different from the round or square shape shown here. Also in cross-section, the shape of the baking inserts and the associated insertion recesses may differ from the illustrated form. For example, the angle between the side surfaces 35 and the bottom surface 34 may also be deviating from 90 °, in particular an angle > 90 °. The shape of the insert recess must be adapted to ensure a good heat flow.
    According to the invention, the baking inserts are made of sintered ceramic with high toughness and low thermal expansion. They are preferably made of silicon nitride or silicon carbide, and more preferably of gas pressure sintered silicon nitride of the Al / Y type. The jaw inserts should have a thermal expansion coefficient α of < 9 [10'6 x ΚΊ] based on the temperature range 20 ° to 200 °.
    A sintered product with the following data has proven to be advantageous in practice:
    Chemical composition: - SI3N4 90% -AI203 6% - Y203 4% Structure: apparent density 3.21 [g / cm3; Open porosity 0 [%] grain size 1-10 [m]
    Among the mechanical properties is the following: ::: :: =:. 50239 ρθ / ga: ::: :: =:. 50239 ρθ / ga 8 [Mpam1 / 2] 320 [GPa] 0.28
    Fracture toughness modulus of elasticity Poisson number
    Thermal properties: Thermal conductivity (20X) 30 [W / mK] Thermal expansion coefficient α (-iooo ° C) [10 6ΚΊ]
    The preparation of the baking inserts made of this material is carried out according to the prior art for gas-pressure sintered silicon nitride.
    Other engineering ceramics may also be used to make the bake inserts, such as silicon carbide, which has comparable good properties for the baking process. The disadvantage of silicon carbide ceramics, however, lies in the higher brittleness with the associated greater risk of breakage. For the production of the carrier plates gray cast iron with the designation EN-GJS-400-15 was used. This material has a slightly higher thermal conductivity of 36.2 (W / MK) (300 ° C) and also the thermal expansion coefficient α is higher with 12.5 (10'6 x ΚΊ). This higher coefficient of thermal expansion ensures that at the baking temperatures occurring in the oven, the baking tray is not damaged because it gets enough space for its thermal expansion, its coefficient of thermal expansion is extremely low.
    • *: ΐ3 · *. 50 239 Pe / GA
    Bzgz_50 239_ 1 Oven 2 Front oven half 3 Baking tongs 4 Baking tongs chain 5 Transport path, upper 6 Transport path, lower 7 Oven rack 8 Rear oven half 9 Lower baking tray 10 Upper baking tray 11 Lower carrier plate 12 Upper carrier plate 13 Lower carrier frame 14 Upper carrier frame 15 Joint 16 Roller 17 Control roller 18 Dispensing station 19 Input station 20 Device for opening and closing the baking tongs 21 Baking chamber 22 Upper baking zone 23 Lower baking zone 24 Insert recess 25 Baking insert 26 Sealing rib 27 Sidewall 28 Tabs 29 Bolt 30 Randausnehmung 31 Recess 32 Ventilation hole 33 Baking surface side 34 Bodenfläche 35 Seitenfläche
    权利要求:
    Claims (15)
    [1]
    claims:

    Back plate for baking ovens for producing bakery products such as waffles, crispy waffles, pancakes and the like, characterized in that the baking plate (9, 10) comprises a carrier plate (11, 12) and a or a plurality of arranged on this baking inserts (25) which are adapted to receive the dough to be baked and that the baking inserts (25) are formed of sintered ceramic with high toughness and low thermal expansion.
    [2]
    2. baking plate according to claim 1, characterized in that the baking inserts in Einsatzausnehmungen (24) of the support plate (11,12) are used and that the support plate (11,12) is formed of a material, preferably metal, particularly preferably gray cast iron whose Thermal expansion equal to or greater than the thermal expansion of the baking inserts (25).
    [3]
    3. baking plate according to claim 1 or 2, characterized in that the baking inserts (25) has a thermal expansion coefficient α < 9 [10'6 x k'1] and the support plate has a thermal expansion coefficient α > 9 for the temperature range 20 to 200 ° C.
    [4]
    4. baking plate according to one of claims 1 to 3, characterized in that the baking inserts (25) have a coefficient of thermal expansion of about 3.2 and the support plate has a thermal expansion coefficient of about 12.5.
    [5]
    5. baking plate according to one of claims 1 to 4, characterized in that the baking inserts (25) of silicon nitride or silicon carbide, preferably of gas-pressure sintered silicon nitride of the type Al / Y are formed.
    [6]
    6. baking plate according to one of claims 1 to 5, characterized in that the insertion recesses (24) in the support plate (11,12) for receiving the baking inserts (25) are formed with little play, so that the baking inserts are accurately replaceable and removable again , • *
    [7]
    7. baking plate according to one of claims * 1 to * 6, 'characterized in that the baking inserts (25) on the baking surface side (33) with the desired for the baked product surface design and a circumferential sealing rib (26), and a peripheral side edge (27 ) are provided.
    [8]
    8. baking plate according to one of claims 1 to 7, characterized in that the baking inserts (25) in the insertion recesses (24) are held by tabs (28) fixed to the support plate (11, 12), preferably by bolts (29 ), and the side edge (27) of the baking inserts (25) are arranged across.
    [9]
    9. baking plate according to one of claims 1 to 8, characterized in that the side edge (27) for each tab (28) has an edge recess (30).
    [10]
    10. baking plate according to one of claims 1 to 9, characterized in that for each baking insert (25) at least two, preferably three or four tabs (28) and edge recesses (30) are provided.
    [11]
    11. baking plate according to one of claims 1 to 10, characterized in that the tabs (28) made of metal, preferably made of stainless steel.
    [12]
    12. baking plate according to one of claims 1 to 11, characterized in that each insertion recess (24) has a vent hole (32).
    [13]
    13. baking plate according to one of claims 1 to 12, characterized in that the baking plates (9, 10) of a baking tongs (3) in a respective support frame (12, 13) are arranged and the lower and upper support frame via a joint (15) connected to each other.
    [14]
    14. baking plate according to one of claims 1 to 13, characterized in that the baking plate (9, 10) is part of a baking sheet tongs having a lower and an upper baking plate, wherein the baking inserts (25) are arranged opposite to each other, so after the Closing the baking tongs • * • · * ·

    and formed for the baked product formed therefrom.
    [15]
    15. oven having a through the baking chamber (21) leading orbit for the baking plates and a conveyor for the baking plates, characterized in that the baking plates are formed according to one or more of claims 1 to 14. Vienna, August 1, 2011

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    法律状态:
    2021-04-15| MM01| Lapse because of not paying annual fees|Effective date: 20200818 |
    优先权:
    申请号 | 申请日 | 专利标题
    ATA1190/2011A|AT511851B1|2011-08-18|2011-08-18|BAKING PLATE FOR OVEN|ATA1190/2011A| AT511851B1|2011-08-18|2011-08-18|BAKING PLATE FOR OVEN|
    US14/239,309| US9572350B2|2011-08-18|2012-08-17|Baking plate for baking ovens|
    PCT/EP2012/066088| WO2013024152A1|2011-08-18|2012-08-17|Baking plate for baking ovens|
    RU2014110311/13A| RU2593938C2|2011-08-18|2012-08-17|Bottom plate for ovens|
    BR112014003076-6A| BR112014003076B1|2011-08-18|2012-08-17|OVEN COOKING PLATE|
    KR1020147007188A| KR20140060537A|2011-08-18|2012-08-17|Baking plate for baking ovens|
    JP2014525458A| JP2014526889A|2011-08-18|2012-08-17|Baking plate for baking kiln|
    IN2049CHN2014| IN2014CN02049A|2011-08-18|2012-08-17|
    EP12748226.3A| EP2744348B1|2011-08-18|2012-08-17|Baking plate for baking ovens|
    PL12748226T| PL2744348T3|2011-08-18|2012-08-17|Baking plate for baking ovens|
    CN201280040272.3A| CN104023541B|2011-08-18|2012-08-17|baking tray for oven|
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