Device for temporarily storing cooled material plates

Abstract

The utility model relates to a device for temporarily storing cooled material plates, which comprises the following components: a cooling star-shaped turner which is provided with a cooling rotating disc which is rotatably supported around an axis, the center of the cooling rotating disc comprises a tubular base body, a bearing structure is formed around the base body in a radial direction, according to the invention, the support structure is suitable for forming a plurality of grids in which material plates can be at least temporarily deposited for cooling purposes, the grids being delimited at least in some regions by means of a support which is designed to at least partially support material plates to be received by the support for temporary storage. At least one part of the bearing parts is made of plastic. An improved device for temporary storage of cooled material panels is thus provided. For example, discoloration at the support region is avoided or reduced, otherwise discoloration often occurs after the material panel is stored in a device of the previously mentioned traditional structure type.

Description

Technical Field

[0001] The utility model relates to a device for temporarily storing cooled material plates. Background Art

[0002] Material boards can be manufactured in different ways and using different materials. Material boards produced on the basis of materials obtained from annual or perennial plants, i.e. in particular materials obtained from wood, grass or straw, occupy a very special position among material boards due to their wide range of uses, their good properties and their good cost-effectiveness ratio. For the sake of simplicity, these material boards will be referred to as wooden material boards below, even if they are made partially or completely from grass or straw, because the following requirements are involved in connection with the utility model, which are very similar for material boards made on the basis of wood or on the basis of grass or straw or on the basis of a mixture of the materials mentioned. In order to further simplify the text, in some places, when referring to wooden material boards in the sense just defined, it is also simply said to be "boards".

[0003] Such wood material boards, or hereinafter simply boards, are usually produced as particle boards, MDF boards (medium density fiberboards) or OSB boards by mixing fibers obtained from plants with a binder and then pressing them into wood material boards using a hot press.

[0004] If the wood material boards are pressed in a continuously operating press, the boards are sawn into the desired length after coming out of the press. The boards are then transported individually or in stacks of two or more boards to a device for temporary storage of cooled material boards, which can be constructed as a cooling unit, for example in the form of a cooling turner, in particular in the form of a cooling star turner, and are temporarily stored there. Therefore, during the temporary storage phase, the boards are actively and / or passively cooled, and then the boards are stacked for further transportation and usually also packaged. Before entering the device for temporary storage of cooled material boards or after coming out of the device for temporary storage of cooled material boards, the boards can still be cut, for example by trimming individual or all edge areas.

[0005] Different embodiments of devices for temporarily storing cooled material plates are known from the prior art. Thus, such devices can consist of long tracks on which the plates to be cooled can be guided out of the output area of ​​the press. In order to make the plates, which also lose moisture during their cooling process, "evaporate", it is preferred that these tracks are then configured as roller tracks. In order to prevent the still "soft" plates from bending, the spacing between successive rollers is selected to be as narrow as possible, and in order to achieve the most effective cooling and evaporation, it is selected to be as wide as possible, so that a compromise solution of an axle spacing between 200 mm and 400 mm, for example an axle spacing of 300 mm, is mostly selected, while the roller bars mostly have a diameter between 40 mm and 120 mm, usually between 60 mm and 80 mm. Of course, it is correspondingly preferred to use the same axle spacing and the same rod roller diameter in the same device.

[0006] Other embodiments of the device for temporarily storing cooled material plates can be formed by a cooling turntable. A preferred embodiment of such a cooling turntable is a so-called cooling star turntable. Such a cooling star turntable usually comprises a rotating cooling turntable with a plurality of grids in which the plates can be temporarily stored, in particular for cooling purposes, and the cooling turntable typically comprises a cylindrical circumference to which retaining teeth are fixed at one of the ends in the radial direction of the cooling turntable. In addition to the retaining teeth, parts of the support of the cooling star turntable also provide a load-bearing surface, which is used to support the (weight) force of the plate.

[0007] The retaining teeth are usually arranged in rows of teeth so that the retaining teeth of each row of teeth are located in the same plane in the direction of the axis of rotation of the cooling turntable. A conveyor is provided on the side of the cooling turntable, wherein between the elements of the conveyor there is an intermediate space through which the retaining teeth can move. First, a plate or a plurality of plates or a stack of plates to be temporarily stored and cooled are brought to the standard position and brought to the conveyor. Then, the cooling turntable of the cooling turntable is rotated, wherein, in this case, the turning teeth of the row of teeth lift the plate from the conveyor below the conveyor. The plate or the stack of plates is rotated between the teeth of two adjacent rows of teeth by a predetermined rotation angle, usually a rotation angle of 180 degrees, usually in unobtrusive steps of a few degrees, for example 3 degrees or 6 degrees, and is lowered onto the conveyor at the second side of the cooling turntable. Then, the plate or the stack of plates is conveyed to the second cooling turntable or transported to the stacking position.

[0008] All of the embodiments of such cooling star tumblers known to the applicant are without exception made of painted structural steel.

[0009] However, in practice, this leads to various disadvantages, which have so far only been tolerated by plant manufacturers and plant operators. Therefore, it is usually a very bulky structure, because the turner must be stable enough to receive and turn over the following boards, which are usually cut to a size of 2 meters by 6 meters or even 2.5 meters by 6 meters.

[0010] Due to the plate thickness, which is usually 8 to 26 mm, but in exceptional cases between 4 and 120 mm, and sometimes even significantly thicker, such large plates can have a very high weight. Therefore, the paint layer on the steel support of the cooling star turner should facilitate the sliding of the plate when the plate is deposited and when it is removed. However, these paint layers usually wear out quickly or are damaged during operation.

[0011] Since the cooling properties and / or evaporation characteristics in the areas where the board is in contact or rests on the support surface of the cooling star turner differ from those in other areas, discoloration of the board can occur at these locations, which reduces the sales value. Since the pressure is also concentrated at these locations, it can also happen that the still curing board is compacted in these areas, which leads to a different density than other areas of the board and also reduces the quality of the entire board or makes subsequent processes such as gluing of the usable surface of the board, for example by means of paper, plastic layers or by lacquer, more difficult. Utility Model Content

[0012] Therefore, the object of the present invention is to provide an improved device for temporarily storing cooled material plates, in particular, to at least partially overcome or at least reduce at least one of the above-mentioned disadvantages.

[0013] To this end, the utility model proposes a device for temporarily storing cooled material plates. According to the utility model, the device for temporarily storing cooled material plates comprises: a cooling star-shaped flipper, the cooling star-shaped flipper having a cooling turntable rotatably supported around an axis, the center of the cooling turntable comprising a tubular base body, a bearing structure formed radially around the base body, the bearing structure being suitable for forming a plurality of grids in which material plates can be at least temporarily stored for cooling purposes, characterized in that the grids are at least partially limited by a bearing member, the bearing member being configured to at least partially support a material plate to be received by the bearing member for temporary storage, and at least a portion of the bearing members are made of plastic.

[0014] The device designed in this improved manner offers a number of great advantages: Firstly, the device can be designed to be lighter overall, so that it has a lower weight. Since the cooling star turners that can be used in connection with the production and processing of large material plates have a large diameter or a large circumference, the weight plays a very large role in the energy consumption that is required to rotate the cooling star turners step by step or permanently. Since most cooling turners are rotated further step by step, that is, they are always rotated further by grid, a particularly energy-intensive "starting movement" is required each time. As a result, the energy savings are particularly high.

[0015] Independently of this, however, there is at least one further very great advantage:

[0016] The heat transfer coefficients of wood and plastic are much closer than those of wood and steel. If a cooling star tumbler of conventional design receives material plates to be temporarily stored and cooled, the material plates are therefore hotter than their surroundings, that is to say also hotter than the carriers of the device with which they are in contact in the grid provided for them. The steel carriers quickly dissipate the absorbed heat and therefore remain cooler than the material plates, so that moisture from the material plates accumulates there and condenses there. This can lead to unsightly discolorations. In some particularly disadvantageously designed devices of competitors, it can even happen that areas appear in the material plates which are particularly susceptible to mold at a later stage.

[0017] Since the inventors have recognized this, the present invention can eliminate or at least significantly reduce the disadvantages known from the prior art.

[0018] It is of great advantage if at least half of all carriers consist of plastic.

[0019] As a result, a particularly large amount of energy is saved and the quality of the material plate is negatively affected at particularly large points to a particularly small extent.

[0020] It is particularly advantageous here if at least 80% of all carrier parts consist of plastic.

[0021] This allows a very high energy saving and the possibility of producing and selling material panels which experience only minimal defects during the cooling process and thus achieve a particularly high sales quality, so that a good turnover can also be achieved.

[0022] Furthermore, it can be of great advantage if the carrier composed of plastic consists of at least 80% plastic.

[0023] Although it is expected that the individual supports should advantageously consist of steel in their root region, i.e. at the point where they are connected to the tubular base body, in order to achieve a significant weight reduction, but in particular also to achieve a reduction in storage damage, which has hitherto been mostly mandatory, at temporarily stored material sheets, the highest possible proportion of the supports, up to 80%, should consist of plastic. It can be very advantageous if the supports are even composed completely of plastic.

[0024] In most cases it is preferred that the plastic is a reinforced plastic.

[0025] Such plastics have a higher rigidity, in particular a higher flexural strength. Reinforced plastics can usually also be better connected to other components, which can play an important role here, because the connection between the support part and the tubular base body is subject to particularly high loads during operation.

[0026] Independently of this, it is advantageous if the plastic has a coefficient of friction at its surface of between 0.1 and 0.6.

[0027] Thus, either depositing and withdrawal can be facilitated by a low friction coefficient of 0.1 to 0.34, or, for example, a good contact adhesion between the material plate and the carrier during depositing can be facilitated if the friction coefficient is selected between 0.35 and 0.6.

[0028] In most cases, additional advantages can be expected if at least some of the supports are designed at least partially as hollow profiles.

[0029] The carrier, which is designed as a hollow profile, has high rigidity at a low weight. However, since the thermal conductivity of plastic is significantly lower than the structural steel used hitherto, an additional surface for carrying away heat is obtained in this way. As a result, heat-dissipating and moisture-dissipating profiles adapted to the free areas of the material plate, i.e., not directly supported by the support on the carrier, can be provided particularly well. As a result, both the areas of the material plate supported by the carrier and also the free areas exhibit very similar properties, and unsightly inhomogeneities that reduce the quality and price of the material plate are greatly reduced.

[0030] It may therefore also be advantageous if the profile is designed to be at least substantially open at one end face edge or at both end face edges.

[0031] Furthermore, great advantages may result if the hollow profile consists of plastic, forms an interior space, and the stabilizing element is arranged in the interior space.

[0032] This development of the invention certainly reduces the free volume of the interior, but brings the great advantage of additional stability and can thereby help to produce a (measurable) curvature in a material panel that has not yet (completely) solidified, which would otherwise reduce the sales value of the material panel.

[0033] Independently of this or in conjunction with one of the advantageous embodiments mentioned above or below, it may also be advantageous if the stabilization element is formed integrally with the hollow profile or is introduced into the interior of the hollow profile.

[0034] If the stabilizing element is formed integrally with the hollow profile, it is possible to design the hollow profile as an extruded profile and to manufacture it accordingly. This significantly reduces the cost expenditure of the device and makes it possible particularly well to provide a device for temporarily storing cooled material plates at a low price compared to conventional devices despite its many great advantages, which also provides advantages for the manufacturer of such devices.

[0035] If, as already described above, the device is designed such that a reinforced plastic is used, it is quite particularly advantageous if the reinforced plastic is a glass-fiber-reinforced polyamide.

[0036] In this way, a relatively thin-walled carrier with high rigidity can be realized particularly well and also inexpensively, and a particularly good and materially suitable support can be achieved for the material plate which is cooling during temporary storage in the device.

[0037] It is then possible - but also advantageous in some other cases mentioned in the advantageous embodiment of the invention - for each individual carrier to have a width between 25 mm and 225 mm and a depth between 40 mm and 300 mm, wherein the width of the carrier provides a support surface for the material plate to be temporarily stored, and the depth constitutes the thickness of the carrier. The length of the carrier is related to the size of the material plate to be accommodated and should be slightly larger than the size to be accommodated. If it is planned to accommodate material plates (plates) with a size of 2000 mm by 6000 mm, the length should be slightly larger than 2000 mm, and 6000 mm is formed by a suitable number of carriers and intermediate spacings, for example, 16 carriers and 15 intermediate spaces (air) can be provided for this purpose. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The present invention will be described in more detail below according to an embodiment with reference to the attached figures in the accompanying drawings, wherein:

[0039] Figure 1 A schematic side view showing an apparatus for temporarily storing cooled material panels;

[0040] Figure 2aThe carrier profile is shown;

[0041] Figure 2b A carrier profile is shown. DETAILED DESCRIPTION

[0042] Figure 1 , Figure 2a and Figure 2b The material plates W1 to W1 for temporary storage and cooling according to the present invention are shown. N The device 1 comprises the following: a cooling star tumbler 2 having a cooling turntable 4 rotatably supported about an axis 3, at least in a direction of rotation D, the center 5 of the cooling turntable comprising a tubular base body 6, around which a support structure 7 is formed in radial direction, the support structure being suitable for forming a plurality of grids 8 in which at least material plates W1 to W2 can be temporarily stored. N for cooling purposes, characterized in that the grid 8 is at least partially delimited by a carrier 9 which is designed to at least partially support the material plates W1 to W2 to be received by the carrier for temporary storage. N , and the device 1 or the cooling star turner 2 is also characterized in that at least a part of the carriers 9 is made of plastic.

[0043] During operation, material plates W1 to W N The cooling star turner 2 of the device 1 is supplied via a transport mechanism and is led out again from the cooling star turner 2. As shown here, such a transport mechanism is expediently composed of at least one conveyor belt 13 and at least one guide element 14, respectively.

[0044] Here, the two guide elements 14 are each designed in a comb-like manner and have a free space in the direction of the image plane in the embodiment shown, which allows: when the cooling star turner rotates, the carrier 9 of the cooling star turner 2 can move unhindered. If a material plate is located on the guide element 14 on the input side of the cooling star turner 2, as shown here by the material plate W2, it is removed from the next row of carriers 9 and is stored in the relevant grid 8 of the cooling star turner for temporary storage. While the material plate is stored in the grid 8, the corresponding material plates W1 to W2 are moved. N At least partially cooled and usually also at least partially evaporated.

[0045] The input and output sides of the device 1 are connected by material plates W1 to W N The transport direction is defined by the direction of rotation D, which can be seen here in the direction of rotation D. Figure 1 In the illustration shown in , it extends from the left side of the image to the right side of the image.

[0046] exist Figure 1 In the exemplary embodiment shown in FIG. 1 and which is preferred, at least half of all carriers 9 are composed of plastic.

[0047] At least 80% of all the carriers 9 consist of plastic. Thus, the device 1 shown and its cooling star turner 2 have a carrier row in each cell with 17 carriers 9 arranged one behind the other for the material plates W1 to W2 temporarily stored in the respective cell. N For example, the carrier rows have a width of about 30 mm to about 80 mm and are arranged at intervals of about 200 mm to about 400 mm, for example 300 mm, into the image plane. Of course, the carrier rows can be arranged according to the material plates W1 to W2 to be processed. N The number of carriers 9 fluctuates depending on the size of the carriers 9 and the dimensions of the carriers 9 and the free spaces remaining between the carriers 9 and has, for example, a number of values ​​between 12 and 24.

[0048] Here, in Figure 1 , Figure 2a and Figure 2b The support 9 shown in the figure, which is made of plastic, is at least 80% made of plastic. Therefore, the support 9 can be completely made of steel, especially in its base area (root area) facing the tubular body, but the overwhelming majority of the support is made of plastic.

[0049] To this end, according to Figure 1 , Figure 2a and Figure 2b In the exemplary embodiment of , a reinforced plastic is used which gives the carrier 9 and thus also the device 1 a particular stability.

[0050] In order to ensure that the material panels W1 to W1 are temporarily stored in the device 1 N Good storage and retrieval, but at the same time to prevent the material plates W1 to W in the grid 8 from N Slipping, plastic has a coefficient of friction between 0.1 and 0.6 at its surface.

[0051] The device 1 shown in these three figures can be manufactured, operated and maintained particularly cost-effectively, since at least some of the support elements 9 are also designed at least partially as hollow profiles 10. Therefore, the drive power to be applied in order to rotate the cooling star turner 2 in the direction of rotation D is low. In addition, the support elements can be manufactured cost-effectively and, due to their low weight, can also be easily replaced by one or two specialized workers without a significant risk of accidents.

[0052] In order to minimize deflections of the support 9 or even completely prevent them under load for practical reasons, the hollow profile 10 of the support 9 (which is made of plastic) shown in cross section in FIG. 2 indicates an interior space 11 and a stabilizing element 12 which is arranged in the interior space 11 .

[0053] exist Figure 2a 1 shows a support 9 in cross section, wherein the stabilizing elements 12 are each formed in one piece from a hollow profile 10, and in Figure 2b , in its cross section, shows a carrier in which a stabilization element 12 is introduced into the interior 11 of a hollow profile 10 . Figure 2b In the case shown in FIG. 1 , the stabilizing element 12 or the stabilizing elements 12 can also be made of other materials, for example metal, such as aluminum or even steel, aluminum being preferred here for weight reasons. For example, the carrier 9 of the device 1 can also be alternately equipped with a plurality of stabilizing elements 12 according to the embodiment of the present invention. Figure 2a or according to Figure 2b Of course, the form of the stabilizing element 12 shown is only exemplary and can also be designed differently. Figure 2b Stabilizing elements introduced as separate components into the hollow profile 10 can also advantageously be made of plastic, especially when a uniform heat capacity is important. Figure 2a and Figure 2b Other forms different from those shown may be rejected and / or have other dimensions.

[0054] In the exemplary embodiment shown, glass-fiber-reinforced polyamide is used for the carrier 9 and in some cases, in particular according to Figure 2a It is also used for stabilizing element 12 .

[0055] Without departing from the scope of the present invention, the embodiments shown can be deviated from in many ways. In particular, other combinations of the embodiments mentioned in the text and the value ranges also mentioned therefor that differ from the preferred embodiments illustrated in the drawings are also within the scope of the present invention.

[0056] Reference numerals list

[0057] 1 device,

[0058] 2 cooling star tumblers,

[0059] 3 axis,

[0060] 4 cooling turntable,

[0061] 5 Center,

[0062] 6 substrate,

[0063] 7 bearing structure,

[0064] 8 grids,

[0065] 9 bearing members,

[0066] 10 hollow profiles,

[0067] 11Interior Space,

[0068] 12 stabilizing elements,

[0069] 13 conveyor belts,

[0070] 14 guiding elements,

[0071] W1 to W N (one or more) material sheets,

[0072] D direction of rotation,

[0073] X width,

[0074] Y depth,

[0075] Z length.

Claims

1. A device for temporarily storing cooled material plates, wherein: The device (1) comprises the following: A cooling star tumbler (2) comprising a cooling turntable (4) rotatably supported about an axis (3), the center (5) of the cooling turntable comprising a tubular base body (6), around which a support structure (7) is formed in the radial direction, the support structure being suitable for forming a plurality of grids (8) in which material plates can be at least temporarily stored for cooling purposes, The invention is characterized in that the grid (8) is at least partially delimited by a carrier (9), which is designed to at least partially support a material panel to be received by the carrier for temporary storage, At least a portion of the carriers (9) are made of plastic.

2. The device for temporarily storing cooled material plates according to claim 1, characterized in that: At least half of all the supports (9) are made of plastic.

3. The device for temporarily storing cooled material plates according to claim 1, characterized in that: At least 80% of all carrier parts (9) consist of plastic.

4. The device for temporarily storing cooled material plates according to any one of claims 1 to 3, characterized in that: The plastic is a reinforced plastic.

5. The device for temporarily storing cooled material plates according to any one of claims 1 to 3, characterized in that: The plastic has a coefficient of friction at the surface of the plastic of between 0.1 and 0.

6.

6. The device for temporarily storing cooled material plates according to any one of claims 1 to 3, characterized in that: At least some of the supports (9) are at least partially constructed as hollow profiles (10).

7. The device for temporarily storing cooled material plates according to claim 6, characterized in that: The hollow profile (10) is made of plastic, forms an inner space (11), and a stabilizing element (12) is arranged in the inner space (11).

8. The device for temporarily storing cooled material plates according to claim 7, characterized in that: The stabilization element (12) is formed integrally with the hollow profile (10) or the stabilization element is introduced into the interior (11) of the hollow profile (10).

9. The device for temporarily storing cooled material plates according to claim 4, characterized in that: The reinforced plastic is glass-fiber-reinforced polyamide.

10. The device for temporarily storing cooled material plates according to claim 4, characterized in that: At least some of the supports (9) are at least partially constructed as hollow profiles (10).

11. The device for temporarily storing cooled material plates according to claim 5, characterized in that: At least some of the supports (9) are at least partially constructed as hollow profiles (10).

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