DE102016012393A1 - Dosing device for bulk material made of plastic - Google Patents
Dosing device for bulk material made of plastic Download PDFInfo
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- DE102016012393A1 DE102016012393A1 DE102016012393.1A DE102016012393A DE102016012393A1 DE 102016012393 A1 DE102016012393 A1 DE 102016012393A1 DE 102016012393 A DE102016012393 A DE 102016012393A DE 102016012393 A1 DE102016012393 A1 DE 102016012393A1
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- container
- bulk material
- dosing device
- dry air
- return line
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- 239000013590 bulk material Substances 0.000 title claims abstract description 74
- 229920003023 plastic Polymers 0.000 title claims abstract description 14
- 239000004033 plastic Substances 0.000 title claims abstract description 14
- 238000001035 drying Methods 0.000 claims description 22
- 230000008929 regeneration Effects 0.000 claims description 10
- 238000011069 regeneration method Methods 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 3
- 238000011144 upstream manufacturing Methods 0.000 claims description 3
- 239000002918 waste heat Substances 0.000 claims description 2
- 239000003570 air Substances 0.000 description 73
- 239000012080 ambient air Substances 0.000 description 3
- 239000000835 fiber Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000007791 dehumidification Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B13/00—Conditioning or physical treatment of the material to be shaped
- B29B13/06—Conditioning or physical treatment of the material to be shaped by drying
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B13/00—Conditioning or physical treatment of the material to be shaped
- B29B13/06—Conditioning or physical treatment of the material to be shaped by drying
- B29B13/065—Conditioning or physical treatment of the material to be shaped by drying of powder or pellets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
- B29B7/34—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices
- B29B7/38—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary
- B29B7/40—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with single shaft
- B29B7/42—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with single shaft with screw or helix
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
- B29B7/58—Component parts, details or accessories; Auxiliary operations
- B29B7/60—Component parts, details or accessories; Auxiliary operations for feeding, e.g. end guides for the incoming material
- B29B7/603—Component parts, details or accessories; Auxiliary operations for feeding, e.g. end guides for the incoming material in measured doses, e.g. proportioning of several materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/80—Component parts, details or accessories; Auxiliary operations
- B29B7/801—Valves
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/80—Component parts, details or accessories; Auxiliary operations
- B29B7/82—Heating or cooling
- B29B7/826—Apparatus therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/80—Component parts, details or accessories; Auxiliary operations
- B29B7/84—Venting or degassing ; Removing liquids, e.g. by evaporating components
- B29B7/845—Venting, degassing or removing evaporated components in devices with rotary stirrers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/80—Component parts, details or accessories; Auxiliary operations
- B29B7/86—Component parts, details or accessories; Auxiliary operations for working at sub- or superatmospheric pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/80—Component parts, details or accessories; Auxiliary operations
- B29B7/88—Adding charges, i.e. additives
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/80—Component parts, details or accessories; Auxiliary operations
- B29B7/88—Adding charges, i.e. additives
- B29B7/90—Fillers or reinforcements, e.g. fibres
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C31/00—Handling, e.g. feeding of the material to be shaped, storage of plastics material before moulding; Automation, i.e. automated handling lines in plastics processing plants, e.g. using manipulators or robots
- B29C31/02—Dispensing from vessels, e.g. hoppers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/285—Feeding the extrusion material to the extruder
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/285—Feeding the extrusion material to the extruder
- B29C48/286—Raw material dosing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/285—Feeding the extrusion material to the extruder
- B29C48/287—Raw material pre-treatment while feeding
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B17/00—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement
- F26B17/12—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed solely by gravity, i.e. the material moving through a substantially vertical drying enclosure, e.g. shaft
- F26B17/14—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed solely by gravity, i.e. the material moving through a substantially vertical drying enclosure, e.g. shaft the materials moving through a counter-current of gas
- F26B17/1408—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed solely by gravity, i.e. the material moving through a substantially vertical drying enclosure, e.g. shaft the materials moving through a counter-current of gas the gas being supplied and optionally extracted through ducts extending into the moving stack of material
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/06—Controlling, e.g. regulating, parameters of gas supply
- F26B21/10—Temperature; Pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B23/00—Heating arrangements
- F26B23/001—Heating arrangements using waste heat
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B3/00—Drying solid materials or objects by processes involving the application of heat
- F26B3/02—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air
- F26B3/06—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour flowing through the materials or objects to be dried
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/18—Feeding the material into the injection moulding apparatus, i.e. feeding the non-plastified material into the injection unit
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Abstract
Die Dosiervorrichtung für Schüttgut aus Kunststoff hat wenigstens einen das Schüttgut aufnehmenden Behälter und wenigstens ein Dosierorgan zum dosierten Austrag des Schüttgutes. In den Behälter mündet wenigstens eine Zuführleitung. Über sie wird Trockenluft in den Behälter geleitet, die durch das Schüttgut strömt. An den Behälter ist wenigstens eine Rückführleitung angeschlossen, über die die Trockenluft aus dem Behälter strömt.The metering device for bulk material made of plastic has at least one container receiving the bulk material and at least one metering device for the metered discharge of the bulk material. In the container opens at least one supply line. Dry air is passed through it into the container, which flows through the bulk material. At least one return line is connected to the container, via which the dry air flows out of the container.
Description
Die Erfindung betrifft eine Dosiervorrichtung für Schüttgut aus Kunststoff nach dem Oberbegriff des Anspruches 1.The invention relates to a metering device for bulk material made of plastic according to the preamble of
Mit Dosiervorrichtungen wird das aus Kunststoff bestehende Schüttgut, das Granulat, Pulver, Fasern und dgl. sein kann, Verarbeitungsmaschinen dosiert zugeführt, die den Kunststoff verarbeiten. Solche Kunststoffverarbeitungsmaschinen sind beispielsweise Spritzgussmaschinen oder Extruder. Damit das Schüttgut einwandfrei verarbeitet werden kann, ist ein bestimmter Trocknungsgrad des Schüttgutes erforderlich. Da je nach Materialdurchsatz das Schüttgut längere Zeit im Behälter verweilen kann und diese zur Umgebung offen ist, kann das Schüttgut während dieser Lagerzeit Feuchtigkeit aus der Umgebung aufnehmen, was zu Verarbeitungsschwierigkeiten führen kann. Um den Trocknungsgrad des Schüttgutes möglichst gering zu halten, sind die Behälter mit einer aufwändigen Isolierung versehen.With metering devices, the plastic bulk material, which may be granules, powders, fibers and the like. Dosed processing machines supplied processing the plastic. Such plastic processing machines are, for example, injection molding machines or extruders. So that the bulk material can be processed properly, a certain degree of dryness of the bulk material is required. Since depending on the material throughput, the bulk material can stay in the container for a longer time and this is open to the environment, the bulk material can absorb moisture from the environment during this storage time, which can lead to processing difficulties. In order to keep the degree of dryness of the bulk material as low as possible, the containers are provided with elaborate insulation.
Der Erfindung liegt die Aufgabe zugrunde, die gattungsgemäße Dosiervorrichtung so auszubilden, dass in konstruktiv einfacher Weise der Trocknungsgrad des Schüttgutes im Behälter optimal gehalten werden kann.The invention has for its object to form the generic metering device so that in a structurally simple manner, the degree of dryness of the bulk material in the container can be optimally maintained.
Diese Aufgabe wird bei der gattungsgemäßen Dosiervorrichtung erfindungsgemäß mit den kennzeichnenden Merkmalen des Anspruches 1 gelöst.This object is achieved in the generic metering device according to the invention with the characterizing features of
Bei der erfindungsgemäßen Dosiervorrichtung dient der Behälter nicht nur als Vorratsbehälter für das Schüttgut, sondern auch als Trockentrichter. Über die Zuführleitung wird in den Behälter Trockenluft eingeleitet, die das Schüttgut durchströmt und dafür sorgt, dass es den gewünschten Trockengrad erreicht bzw. beibehält. Nach Durchströmen des Schüttgutes gelangt die Trockenluft in die Rückführleitung, über welche die Trockenluft aus dem Behälter strömt. Zum Trocknen des Schüttgutes ist somit kein zusätzliches Gerät erforderlich. Dadurch steht beispielsweise in einer Halle, in der die Dosiervorrichtung aufgestellt ist, mehr Platz zur Verfügung. Da die Dosiervorrichtung auch zum Trocknen des Schüttgutes herangezogen wird, spart der Anwender Kosten bei der Beschaffung der Dosiervorrichtung.In the metering device according to the invention, the container serves not only as a storage container for the bulk material, but also as a drying hopper. Dry air is introduced into the container via the feed line, which flows through the bulk material and ensures that it reaches or retains the desired degree of dryness. After flowing through the bulk material, the dry air enters the return line, through which the dry air flows from the container. For drying the bulk material thus no additional device is required. As a result, for example, more space is available in a hall in which the metering device is installed. Since the metering device is also used for drying the bulk material, the user saves costs for the procurement of the metering device.
Die Dosiervorrichtung ist als Trockendosierer ausgebildet, bei dem getrocknetes Schüttgut trocken und/oder warm gehalten oder das Schüttgut mit trockener warmer Luft vorgewärmt, vorgetrocknet oder entfeuchtet wird.The metering device is designed as a dry metering device, in which dried bulk material is kept dry and / or warm or the bulk material is preheated with dry, warm air, predried or dehumidified.
Vorteilhaft ist die Rückführleitung an ein Vakuumfördersystem angeschlossen, das bei solchen Anlagen in der Regel ohnehin vorhanden ist. Über dieses Vakuumfördersystem wird die Trockenluft durch den Behälter gezogen, so dass ein zusätzliches Gebläse nicht erforderlich ist.Advantageously, the return line is connected to a vacuum conveying system, which is usually present anyway in such systems. Through this vacuum conveyor system, the dry air is drawn through the container, so that an additional fan is not required.
Es ist weiter möglich, dass die Zuführleitung an eine Druckquelle angeschlossen ist. Mit ihr ist es möglich, entspannte Druckluft in die Zuführleitung einzubringen. Mit der entspannten Druckluft wird ein hoher Trocknungseffekt erzielt, so dass das Schüttgut im Behälter innerhalb kurzer Zeit auf den gewünschten Trocknungsgrad gebracht werden kann.It is also possible that the supply line is connected to a pressure source. With it it is possible to introduce relaxed compressed air into the supply line. With the relaxed compressed air, a high drying effect is achieved, so that the bulk material in the container can be brought to the desired degree of drying within a short time.
Damit die Trockenluft gleichmäßig durch das Schüttgut strömen kann, weist die Zuführleitung an ihrem Auslassende innerhalb des Behälters einen Auslasstrichter auf. Er ist vorteilhaft so angeordnet, dass die Trockenluft aus dem Auslasstrichter nach unten austritt und dann durch das Schüttgut nach oben im Behälter strömt. Dadurch kann das Schüttgut zuverlässig auf den optimalen Trocknungsgrad gebracht werden.So that the dry air can flow uniformly through the bulk material, the supply line has an outlet funnel at its outlet end within the container. It is advantageously arranged so that the dry air emerges from the outlet funnel down and then flows through the bulk material upwards in the container. As a result, the bulk material can be reliably brought to the optimum degree of drying.
Der Auslasstrichter befindet sich vorteilhaft nahe dem Boden des Behälters. Wenn die Trockenluft vorteilhaft nach unten aus dem Auslasstrichter austritt, ist dadurch sichergestellt, dass auch das im Bodenbereich des Behälters befindliche Schüttgut von der Trockenluft erfasst wird.The discharge hopper is advantageously located near the bottom of the container. If the dry air advantageously exits downwards out of the outlet funnel, this ensures that the bulk material in the bottom region of the container is also caught by the dry air.
Die Rückführleitung für die Trockenluft befindet sich in vorteilhafter Weise an einem auf den Behälter von oben aufgesetzten Deckel. Dadurch ist gewährleistet, dass auch das im Bereich des Deckels befindliche Schüttgut von der Trockenluft erfasst wird.The return line for the dry air is located advantageously on a lid placed on the container from above. This ensures that the bulk material in the area of the lid is also covered by the dry air.
Das Dosierorgan kann bei einer einfachen Ausführungsform im Behälter selbst angeordnet sein.The dosing can be arranged in a simple embodiment in the container itself.
Es ist aber auch möglich, das Dosierorgan im Bereich außerhalb des Behälters vorzusehen.But it is also possible to provide the dosing in the area outside the container.
Wenn in der Rückführleitung ein Ventil sitzt, dann kann bei einer Vakuumförderung der Trockenluft die Rückführleitung abgeschaltet werden, wenn mit dem Dosierorgan eine dosierte Schüttgutmenge aus dem Behälter abgegeben wird. Durch Schließen dieses Ventiles ist im Behälter kein Unterdruck mehr vorhanden. Die Abgabe des Schüttgutes ist dadurch zuverlässig möglich. Sobald die Schüttgutmenge abgegeben und das Dosierorgan den Behälter wieder verschlossen hat, wird das Ventil geöffnet, so dass die Trockenluft wieder durch das Schüttgut im Behälter strömen kann.If a valve is located in the return line, then the return line can be switched off in a vacuum conveying the dry air, if with the metering a metered amount of bulk material is discharged from the container. By closing this valve no vacuum is present in the container. The delivery of the bulk material is thereby reliably possible. As soon as the bulk material has been dispensed and the metering device has closed the container again, the valve is opened so that the dry air can again flow through the bulk material in the container.
Das Ventil ist vorzugsweise einstellbar bzw. regelbar.The valve is preferably adjustable or adjustable.
Bei einer vorteilhaften Ausführungsform ist die Zuführleitung über wenigstens eine Heizeinrichtung an den Behälter angeschlossen. Die Trockenluft kann somit vor dem Eintritt in den Behälter auf eine gewünschte Temperatur erwärmt werden. Durch dieses Prinzip des Wärmelufttrockners kann beispielsweise eine relative Feuchte von 0,07% bei 80°C Erwärmung, ausgehend von einer Anfangsfeuchte von 0,7% bei 30°C, erreicht werden, ohne dass teures zusätzliches Trocknungssystem erforderlich ist. In an advantageous embodiment, the supply line is connected to the container via at least one heating device. The dry air can thus be heated to a desired temperature before entering the container. By this principle of the heat-air dryer, for example, a relative humidity of 0.07% at 80 ° C heating, starting from an initial moisture of 0.7% at 30 ° C, can be achieved without expensive additional drying system is required.
Von Vorteil ist es, wenn in der Zuführleitung und/oder in der Rückführleitung wenigstens eine Regeneriereinheit angeordnet ist. Mit ihr lässt sich die von der Trockenluft beim Durchgang durch das Schüttgut aufgenommene Feuchte wieder entfernen.It is advantageous if at least one regeneration unit is arranged in the supply line and / or in the return line. With it, the moisture absorbed by the dry air when passing through the bulk material can be removed again.
Hierbei ist es von besonderem Vorteil, wenn die Regeneriereinheit der Heizeinrichtung vorgeschaltet ist. Dann ist eine optimale Trocknung der Trockenluft gewährleistet.It is particularly advantageous if the regeneration unit is connected upstream of the heating device. Then optimal drying of the dry air is guaranteed.
Die Regeneriereinheit ist vorteilhaft eine Trocknungspatrone. Sie ist ein kostengünstiges Bauteil. Ist die Trocknungspatrone mit Feuchtigkeit gesättigt, lässt sie sich in einfacher Weise wieder regenerieren, so dass sie für einen erneuten Regenerierprozess zur Verfügung steht. Es ist daher von Vorteil, wenn wenigstens zwei Regeneriereinheiten vorgesehen sind. Dadurch besteht die Möglichkeit, die eine Regeneriereinheit aus dem Trockenluftkreislauf herauszunehmen und zu regenerieren. In diesem Falle wird die Trockenluft durch die andere Regeneriereinheit geleitet.The regeneration unit is advantageously a drying cartridge. It is a low-cost component. If the drying cartridge is saturated with moisture, it can easily be regenerated so that it is available for a renewed regeneration process. It is therefore advantageous if at least two regeneration units are provided. This makes it possible to remove the regeneration unit from the dry air circuit and regenerate. In this case, the dry air is passed through the other regeneration unit.
Eine optimale Energieeinsparung ergibt sich, wenn die Zuführleitung an wenigstens einen Wärmetauscher angeschlossen ist, der Abwärme aus dem Kunststoffverarbeitungsprozess nutzt. Bei der Verarbeitung des Kunststoffschüttgutes entsteht an der Verarbeitungsmaschine Wärme, die zur Erwärmung der Trockenluft herangezogen werden kann. So kann ein solcher Wärmetauscher beispielsweise über dem Einzug einer Extruderschnecke eines entsprechenden Extruders angeordnet sein. An dieser Stelle haben solche Maschinen in der Regel noch eine Temperatur von 60°C, falls an dieser Stelle eine Kühlung vorgenommen wird. An dieser Stelle der Maschine können aber auch Temperaturen von beispielsweise bis zu 200°C herrschen. Mit dem Wärmetauscher lässt sich diese Energie optimal nutzen, um die Trockenluft vor dem Eintritt in den Behälter vorzuwärmen.An optimal energy saving results when the supply line is connected to at least one heat exchanger that uses waste heat from the plastic processing process. When processing the plastic bulk material, heat is generated at the processing machine which can be used to heat the dry air. For example, such a heat exchanger can be arranged above the intake of an extruder screw of a corresponding extruder. At this point, such machines usually have a temperature of 60 ° C, if at this point a cooling is made. At this point of the machine but can also prevail temperatures of up to 200 ° C, for example. With the heat exchanger, this energy can be optimally used to preheat the dry air before entering the container.
Der Anmeldungsgegenstand ergibt sich nicht nur aus dem Gegenstand der einzelnen Patentansprüche, sondern auch durch alle in den Zeichnungen und der Beschreibung offenbarten Angaben und Merkmale. Sie werden, auch wenn sie nicht Gegenstand der Ansprüche sind, als erfindungswesentlich beansprucht, soweit sie einzeln oder in Kombination gegenüber dem Stand der Technik neu sind.The subject of the application results not only from the subject matter of the individual claims, but also by all the information and features disclosed in the drawings and the description. They are, even if they are not the subject of the claims, claimed as essential to the invention, as far as they are new individually or in combination over the prior art.
Weitere Merkmale der Erfindung ergeben sich aus den weiteren Ansprüchen, der Beschreibung und den Zeichnungen.Further features of the invention will become apparent from the other claims, the description and the drawings.
Die Erfindung wird anhand einiger in den Zeichnungen dargestellter Ausführungsformen näher erläutert. Es zeigenThe invention will be explained in more detail with reference to some embodiments shown in the drawings. Show it
Die Dosiervorrichtung gemäß
Zwischen den beiden Behältern
Auf den Behältern
Die Behälter
Die Behälter
In den Behältern
Das Schüttgut gelangt über den Auslass
An ein Gehäuse
Die Trockenluft kann als Umgebungsluft oder als beliebig getrocknete Luft vorgesehen sein.The dry air can be provided as ambient air or as any dried air.
Die Dosiervorrichtung kann auch nur zum Trockenhalten des Schüttgutes
An die Heizeinrichtung
Dem Schüttgut
Die Dosiervorrichtung dient nicht nur zum Dosieren des Schüttgutes, sondern auch zum Trocknen des Schüttgutes, bevor es an die Verarbeitungsmaschine
Die Trockenluft kann nicht nur zum Trocknen des Schüttgutes
Mit den Ventilen
Die Dosiervorrichtung gemäß
Die Trockenluft tritt entsprechend der vorigen Ausführungsform über die Zuführleitung
Die Trockenluft wird mit Hilfe des Vakuumfördersystems
Im Bereich zwischen der Auslassöffnung
Der Heizeinrichtung
Im Bereich zwischen der Trocknungspatrone
Bei der Ausführungsform gemäß
Im Unterschied zur vorigen Ausführungsform wird nicht die vom Dosierorgan
Auch bei dieser Ausführungsform wird die Trockenluft nicht über ein gesondertes Gebläse zugeführt, sondern mittels des Vakuumfördersystems
Das Ausführungsbeispiel gemäß
Das Dosierorgan
Auch bei dieser Ausführungsform tritt die Trockenluft nach unten aus dem Auslasstrichter
Die Dosiervorrichtung gemäß
Der Behälter
Wie sich aus den beschriebenen Ausführungsformen ergibt, sind die Dosiervorrichtungen mit wenigstens einer Waage und einem Dosierorgan ausgestattet. Es ist darüber hinaus möglich, die Dosiervorrichtungen als volumetrische Geräte auszubilden, die keine Waage aufweisen.As is apparent from the described embodiments, the metering devices are equipped with at least one balance and a metering. It is also possible to form the metering devices as volumetric devices that have no balance.
Claims (16)
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Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2953407A1 (en) * | 1978-12-19 | 1981-01-08 | H Jochumsen | Apparatus for drying granulated material and a valve means for use with said apparatus |
DE8707216U1 (en) * | 1987-05-20 | 1988-06-23 | Gerco Apparatebau Gmbh & Co Kg, 4414 Sassenberg, De | |
DE69128947T2 (en) * | 1990-06-29 | 1998-06-18 | Matsui Mfg Co | Device for drying powdery or granular material |
DE102004004680A1 (en) * | 2004-01-29 | 2005-10-20 | Mann & Hummel Protec Gmbh | Automatic control of the drying of bulk material |
DE102006024126A1 (en) * | 2006-05-22 | 2007-11-29 | Bühler AG | Device for drying crystallizable synthetic material, comprises a processing space for uptake of the synthetic material, feed- and discharge openings for the synthetic material, process gas feed mechanisms, and process gas exhaust systems |
DE202008013225U1 (en) * | 2008-10-08 | 2010-02-25 | Digicolor Gmbh | Drying plant for plastic granules |
-
2016
- 2016-10-12 DE DE102016012393.1A patent/DE102016012393A1/en not_active Withdrawn
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2953407A1 (en) * | 1978-12-19 | 1981-01-08 | H Jochumsen | Apparatus for drying granulated material and a valve means for use with said apparatus |
DE8707216U1 (en) * | 1987-05-20 | 1988-06-23 | Gerco Apparatebau Gmbh & Co Kg, 4414 Sassenberg, De | |
DE69128947T2 (en) * | 1990-06-29 | 1998-06-18 | Matsui Mfg Co | Device for drying powdery or granular material |
DE102004004680A1 (en) * | 2004-01-29 | 2005-10-20 | Mann & Hummel Protec Gmbh | Automatic control of the drying of bulk material |
DE102006024126A1 (en) * | 2006-05-22 | 2007-11-29 | Bühler AG | Device for drying crystallizable synthetic material, comprises a processing space for uptake of the synthetic material, feed- and discharge openings for the synthetic material, process gas feed mechanisms, and process gas exhaust systems |
DE202008013225U1 (en) * | 2008-10-08 | 2010-02-25 | Digicolor Gmbh | Drying plant for plastic granules |
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