DE6906121U - DEVICE FOR MANUFACTURING PLATE-SHAPED WORKPIECES. - Google Patents

Description

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These. Current time 347Ο / 71 Adolf Buddenberg G.m.b.H., 3 * 9o Bad Driburg / Westf.

"Device sun manufacture of plate-shaped Work pieces "

The innovation relates to a device "to manufacture Plate-shaped work stacks made of shredded material, in particular fiber material, such as wood chips or the like is blown into a molding space by means of an air stream.

Devices to manufacture workpieces from shredded chip or fibrous materials are in the different Executions become known. A group of known devices focuses on the production of large-area, plate-shaped ones Prefabricated products or fleeces. These devices work according to the principle of scattering (chipboard industry) or according to

the principle of the Felter (fibreboard industry * *). You are in Relatively complex and expensive to build. The systems, which work according to the principle of scattering, give rise to difficulties when processing fine, fibrous material, because such material can only be adequately produced with a great deal of effort Dosing accuracy on the surface - swirling, swirling of the chips, etc. also results in unequal Board weights per unit area.

A production of workpieces or fleeces with fine outer layers So far, it has only been possible to see through separate scattering of the material layers or through air separation during the scattering process achieve.

A second group of devices relates to filling of forms. Here, forming spaces are required that correspond to the workpieces to be created and into which the comminuted Material is introduced in various ways, e.g. by means of air. A major disadvantage of filling molds with air is that on the one hand the deposit edge of the blown Material layer migrates towards the injection point and on the other hand an irregular material supply over the whole Shape expansion takes place. Both factors lead to unequal densities and therefore different strengths Work pieces. In addition, the turbulence is very large and different depending on the filling level of the form; the workpieces show "flow figures" on the surfaces, which are also characterized by j Mark coating materials through. j

The object of the innovation is, while avoiding the previous disadvantages, an improved device for producing plate-shaped Create workpieces from shredded material, which enables simple and economical workpiece production at s ^ oss Strength of the workpieces and workpieces with external

layers of fine material results. _Λ

According to the innovation, a device for producing plat- J ten-shaped workpieces made of shredded material by two

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endlessly circumferential at a distance, forming a shaping space and conveyor belts held in place in a chip material feed channel marked, of which Al & eV ^ ftftSllurehlässig is formed. BabeiL can adjust the speed of the conveyor belt for the deposit »· speed of the air flow «wipe the conveyor belts blown glued chip material.

In a preferred embodiment, the two transport binders are arranged circumferentially in a horizontal plane and equipped with passage openings on the entire line; It is preferred to form the tranuport belts from close-meshed binders made of Breiit ₉ plastic or textile, see below, and to support their transport strand in each case by an at least partially air-permeable abutment flea, see below.

But there is a limit between the two conveyor belts Arrange a stop in the front area of the shaping space and the conveyor belts in the lateral edge areas Limiting webs that close to the side of the molding space can be used be provided.

The channel feeding the chip material leaves you with its inlet opening Arrange at the front across the entire bandwidth and provide one or more injectors A suction device can also be installed in the area of each conveyor belt be arranged, which sucks off any finest chips that may emerge from the belts in a dust-free manner of operation.

Further features of the innovation can be seen from the others Subclaims.

The subject of the innovation extends not only to the Features of the individual claims, but also on their combination.

The device according to the innovation shows little technical Expenditure a very high production speed and thus great economic efficiency.

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It is particularly advantageous that in one work step, when the chip material is loosely formed, fine cover layers are attached to the Outer sides of the fleece are formed because it is more advantageous Way through the air flow blowing the material into the molding space, the finer chips are moved outwards and the larger chip portions remain in the middle of the workpiece cross-section.

The chip material is conveniently with a constant and controllable air flow over the entire width of the belts in the Blown in the molding space and through the movement of the belts, the deposit edge remains at the same distance from the blow-in point in a favorable way a perfect deposit (pouring) "" equals. The fleece produced has a high packing density and thus good strength; Furthermore, this fleece can be easily transported and is not caused by drafts or the like. swirled. The tight packing also enables the fleece to be pressed into molds. The fleece formation takes place in cheaper In a closed space, and the finest chips escaping through the shaping space can easily be vacuumed off, so that the work area is kept free of dust.

Through the stop edges that come with the chip part sehüttung wander and leave the web in a simple manner by means of separating webs arranged in the direction of the length of the tape produce. The endlessly circulating conveyor belts and the favorable chip material supply make it possible in an advantageous manner continuous web formation with favorable web strength and fine layers on the outside

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The drawing shows an example of the innovation posed. Show it :

Fig. 1 is a side view of a device for producing:

represent plates of shredded material i in a schematic representation with a material

downstream to the ear canal, at a distance above f

endlessly circulating conveyor belts, *

Fig. 2 is a plan view of the same device at

removed upper conveyor belt, partially cut.

A device according to the invention for producing plates made of shredded material, in particular fiber material, such as Wood chips or the like., Has two at a distance endlessly circumferential, preferably in a horizontal plane, endlessly circulating transport binders on top of one another as a support belt Io and cover belt 11, the deflection of which » roll loa. lla are rotatably mounted in stands 12. At least One, preferably both, bands lo, ll are air-permeable and preferably provided with passage openings 13 over the entire belt surface. The shroud 11 and the Carrying tape Io can each consist of a close-meshed tape made of wire, plastic or textile (see FIG. 2).

These two conveyor belts lo, ll form with at least one stop 14 and 11 that run along between the two belts Io, 11 Lateral limiting webs 15 have a shaping space for receiving the chip material resulting in the panels. The two conveyor belts lo, 11 is preceded by a feed channel 16 from which the chip material into the forming space by means of an air stream is blown in. The chip material feed channel 16 extends sie with miner injection opening 16a preferably over the entire Width of the two bands Io, 11 and is in a forehead area of the

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two bands Ιο, 11 arranged; this access channel 16 is old at least one, preferably with several nozzles (injectors) 17, which over the entire width of the two conveyor belts lo, ll an even and controllable air flow rate produce. The chip material is fed to the injectors 17 in the direction 18 and the air flow in the direction of the arrow 19 and is blown from the nozzles 17 as a material air stream into the baffle space formed by the supply channel 16, in which it is by means Leitsysteae 2o to the whole width of the injection opening 16a $ of the feed channel 16 is distributed.

) From the two conveyor belts Io, 11 running one above the other in a horizontal plane, one belt, preferably the upper cover belt 11 opposite the carrier belt Io, can be adjusted in one position arranged inclination, ie the shroud 11 can with its one | blowing side end vertically adjusted warden · so that the band \ distance in dea einblasseitigen range changes can "ground and is held in great Heise preferred over other dea Bandendbereioh.

Daa Transporttrua (that is the forming space above and below delimiting strand) of each conveyor belt lo, ll let you see from one aindeatens partially air-permeable backlmsenlSrae 21 »« ie Flat plate, board or the like. Support the at least 'a portion of their lengths, preferably that of the inlet side adjacent partial area with passage opening 22 ″ can be seen.

Between the two conveyor belts Io, 11 is a height The band spacing is more appropriate and the width of the band width is more adapted than in the ileal direction of the bands lo, ll front limit Stop used for chip stratification (forming ravan) 11 arranged, the movement with the bands lo, ll is bound. The stop 14 can be of a bar or the like. form and is detachable and / or with a conveyor belt Io or 11 adjustable connected. In the lateral edge areas of the two conveyor belts lo, ll can be used to limit the

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(Chip stratification) each have a delimitation bar 15, such as a bar, Plate, rail or the like. provide; these lateral delimitation webs 15 can be arranged rigidly, so that the two conveyor belts lo.ll circulate between the limiting webs 15 or but the limiting webs 15 can be attached to one or both bands lo, ll and can scait with the bands lo, ll circulate. Furthermore, one or both conveyor belts Io, 11 be formed angled in the lateral edge areas, so that their angled Tefibereiehe circumferential delimiting webs 15 form.

The width of the panel to be produced corresponds to the bandwidth and the length of the panel can be chosen as desired, as the continuous movement of the two conveyor belts lo, ll the bulk of the chip material can be carried out until the desired plate length has been reached or until the length of the conveyor belt is covered by a pile of chip material. Around To be able to produce narrower plates, one or two conveyor belts can lo, ll run in the longitudinal direction, the chip material bulk dividing webs (not shown) can be provided, which in a preferred manner with the conveyor belts lo, ll circulate and for example by belts or the like. are formed.

Each conveyor belt Io, 11 is one in a preferred embodiment Associated suction device 23, which emerges from the air-permeable strips Io and 11 and the abutment surfaces 21 very Extract fine chips for dust-free production; each suction device 23 with its suction surface can be in the area Arrange the transport strand of the two belts lo, ll and provide over the entire conveyor belt surface - it is preferred that the Extraction devices 23 to be provided between the conveyor belts lo, ll *

At least one conveyor belt, preferably the upper cover belt 11, is assigned a scraper 24, such as a cleaning brush or the like »

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the circulating conveyor belts Ιο, ΙΙ from adhering or In the passage openings 13 located chip parts freed.

The lower lanyard Io can be made larger in length, so that this protrudes with its area facing away from the injection point above the upper shroud 11; this tape can Io on the same side as a conveyor device (belt tray) for feeding the chip material bulk, which forms a fleece, into a press bending downstream of the conveyor belts Ιο, ΙΙ.

( In the case of the longer design of the support belt Io, the abutment surface 21 supporting its transport strand also extends over the entire length of the transport strand

In order to remove the chip material cladding on the outside separate cover layers, How to make puree, paper or plastic foils, one or both * preferably the lower one Carrying tape Io in Umlaufriehtung a device before which supplies the tape or tapes Ιο, ΙΙ such a cover layer. This separate cover layer is placed on the lower carrier belt Io or applied to the upper one and to the one with the conveyor belts Ιο, ΙΙ current or current top layers will be the Chip material filling carried out. Instead of the lower stretcher belt Io, a cover layer can also be provided.

The chip material used for panel production is more preferred Way glued, so that the executed chip material lining then in a press with heat and pressure can be pressed into a unit; in the process, the cover layer, which may be provided as an outer surface, connects to the Chip material su a solid body.

The panels are prepared as described below, and the device works as follows:

The glued gap material is spaced between the two

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endlessly circulating transport binders that limit the Fonuingsraini Io on their branched width old uniform air flow blown in and through the at least one bsw. through both Binder Io, 11 outwardly exiting air flow, the finer chips are outwardly to a bsw. blown (rinsed) on both transport binders as plate outer layer (s), whereby the larger chip parts than the middle layer of the plate in the The center of the workpiece (plate) cross-section remains

The speed of rotation of the two transport binders lo, II is adapted to the depositing rate (blowing speed), so that while maintaining the distance ·· τοη depositing edge de · chip material in the molding space and blowing point ^; the chip material is blown into the forming space. The chip j: material therefore always hits the same point in the forming space and through the continuously moving _; Transport binder lo, ll «follows a chip material layering - the layered chip material moves with the binders lo, 11 waiter and thus makes plats for the following material then look with the ties ii ©, ll in tJmlaufriehtung waiter. The display 14 lets you know in g * - f or the desired distance from the injection opening 16a of the chip material feed channel 16 the flow speed of the amount of chips entrained by a certain amount of air, the shape and size of the chip material and the transport speed of the binder lo.ll determined; this corresponds approximately to the rate of deposition. By inclined cutting of the deeker belt 11, an additional compaction of the chip material layer can be achieved. The finer chip portions which come out through the transport binders Io, 11 and the abutment 21 are sucked off. When the chip residue formed has reached the desired sheet size, a new stop 14 can be inserted; the formation is working? also extend continuously. Since the transport binders lo, ll

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«• The aging fleece is then placed in a press blackmailed into a unit under the influence of heat and pressure, meanwhile, the adhesive adhering to the chip material is activated and so a ^ connection results.

The renewal geaisse arrangement emBglicht in advantageous Heise a very high production speed with low « technical «effort. The formed non-woven fabric seigt an Ausseiest favorable firmness and can be seen in different sizes produce. This device is part of the innovation to be modified in structural terms and to adapt to the respective requirements.

Claims (22)

ι · «ι« · it) · ι I · I I · »111 til <- 11 claims for protection 1. Device for producing plate-shaped work 1 Pieces of shredded material, in particular fiber | material, such as wood chips or the like., the equivalently f blown into a molding space by means of an air stream «* I is characterized by two endlessly circulating at a distance - I de, a Foraungsraura forming and a chip material supply - Downstream conveyor belts, of which min- 1 at least one is made air-permeable. ■ 2. Device according to claim 1, characterized in that the two conveyor belts (Io, 11) in a horizontal plane are arranged continuously circumferentially. Device according to Claims 1 and 2, characterized in that the upper conveyor belt (11) serving as a cover belt is arranged at an adjustable incline in relation to the lower conveyor belt (Io) provided as a carrier belt, wherein the belt region of the shroud (11) on the blow-in side is mounted so that it can be moved in height. 4. Device according to speeches 1 to 3 »characterized in that that the cover and carrier tape (11, Io) is equipped with passage openings (13) over the entire surface are. 5. Device according to claims 1 to 4, characterized in that that the cover and carrier tape (11, lo) each from a close-meshed tape made of wire, plastic or Textile are formed. 690611130.3.72 II I 6. Device according to claims 1 to 5, characterized in that The tranaptruB of the cover and carrier tape (11, Io) are each supported by an at least partially air-permeable abutment surface (21) Device according to speeches 1 to 6, characterized therefrom, that at least the one adjacent to the inlet side Part of the abutment flee (21) bit passage openings (22) is equipped. 8. Device according to speeches 1 to 7 »characterized in that that «smell the two conveyor belts (lo.ll) one in the height of the truss spacing and adapted in the width of the belt width, as in the direction of belt movement Tordere limitation for the spaneaterial viewing direction serving Ansehlas (14) is arranged, which is sdt the binders (Io, 11) connected to movement. Device according to speeches 1 to 8, characterized thereby, that the stop (14) is connected by one «, one Bar or the like. formed and losbax · and / or adjustable attached to one of the two transports: <tader (lo, U) is. lo. Device according to claims 1 to 9, thereby gvfinnn « draws that in the two lateral outskirts of the Transport bltnder (lo, ll) limiting webs (15), such as Bars, panels or the like. , to »lateral conclusion of the ForaungsrauBes are arranged. 11. Device according to speeches 1 to Io, characterized thereby- · shows that the side panels (15) are rigid ■ '' are arranged. V ■ - 13 - 12. Device according to claims 1 to 11, characterized gekennzetaianet that the lateral limiting webs (15) «it one or with both conveyor belts (Io, 11) movement stars? ^{1 are} connected. 13. Device according to claims 1 to 11, characterized in that that the lateral delimitation webs (15) of angled partial areas of at least one conveyor belt (lo, ll) are formed. 14. Device according to claims 1 to 13, characterized in that that in the transport direction on at least one conveyor belt (lo, ll) one or more, the chip material layering dividing dividers are arranged. 15. Device according to claims 1 to 14, characterized in that that a suction device (23) is assigned to each air-permeable conveyor belt (Io, 11). 16. Device according to claims 1 to 15, characterized in that daxro the suction device (23) with its suction surface in each case in the area of the transport strand of the Conveyor belts (lo, ll) extends. 17. Device according to claims 1 to 16, characterized that at least one conveyor belt (Iq, 11) a Wiper, in particular 4ne cleaning brush (24) is assigned. 18. Device according to claims 1 to 1?, Characterized in that that the chip material feed channel (16) with its binblae opening (l6a) extends at the end over the (906121 its. N the entire range extends and ait one of the several
Nozzles (injectors 17) is equipped. 19. Device according to claims 1 to 18. characterized in that a single injector (17) with right _; angular exit cross-section is provided, the width of which corresponds to the width of the molding. 2o. Device according to Claims 1 to 19, characterized in that that at least one conveyor belt (Io, 11) one, a separate cover layer that moves with the conveyor belt (lo, ll), such as veneer, paper or plastic film, assigned to introductory facility in the forming room! is. 21. Device according to claims 1 to 2 ©, characterized in that that at least the lower support tape (Io) is formed ton of the separate cover layer. 22. Device in particular according to claim 1, characterized in that shows that the transport ties (lo, 11) with their Circumferential speed of the deposition speed of the glued chip material blown between the transport binders is adapted.