EP0443349B1 - Dispositif pour distribuer de la poudre - Google Patents

Dispositif pour distribuer de la poudre Download PDF

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Publication number
EP0443349B1
EP0443349B1 EP91101245A EP91101245A EP0443349B1 EP 0443349 B1 EP0443349 B1 EP 0443349B1 EP 91101245 A EP91101245 A EP 91101245A EP 91101245 A EP91101245 A EP 91101245A EP 0443349 B1 EP0443349 B1 EP 0443349B1
Authority
EP
European Patent Office
Prior art keywords
conduit
container
gas
extraction
filter
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP91101245A
Other languages
German (de)
English (en)
Other versions
EP0443349A1 (fr
Inventor
Leslie E. Stott
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
HOSOKAWA STOTT LIMITED
Original Assignee
L E Stott Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by L E Stott Ltd filed Critical L E Stott Ltd
Publication of EP0443349A1 publication Critical patent/EP0443349A1/fr
Application granted granted Critical
Publication of EP0443349B1 publication Critical patent/EP0443349B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B1/00—Packaging fluent solid material, e.g. powders, granular or loose fibrous material, loose masses of small articles, in individual containers or receptacles, e.g. bags, sacks, boxes, cartons, cans, or jars
    • B65B1/28—Controlling escape of air or dust from containers or receptacles during filling

Definitions

  • This invention relates to an apparatus for transferring powder from a bulk supply to containers of smaller size, for example, boxes and bags etc.
  • a draught created by an exhaust fan assists the removal of displaced air.
  • air from outside the container is allowed to enter the container through a third conduit and merge with the effluent stream of air leaving the container. In this way an improvement has been effected.
  • this invention provides apparatus for filling a flexible container from a bulk supply, comprising; a weighing base providing a support for a container during filling thereof; a filling head adapted to be disposed in sealing engagement with an upper part of said container to be filled; a powder conduit in said filling head adapted to conduct powder from said bulk supply to an interior space of said container; a vent conduit providing a gas flow path from said space to atmosphere; an extraction conduit with one end connected to said interior space and with another end connectable to an extraction fan, and a purge conduit, connected at one end to a supply of purge gas, the purge conduit having an other end arranged for supplying purge gas into the container interior characterised in that the vent conduit provides such gas flow path to atmosphere in a first direction through a first part of a filter; in that said extraction conduit has a second part of said filter in a path of gas flow from the space into the extraction conduit; in that during purging said other end of said purge conduit discharges purge gas into the extraction conduit which gas thereafter flows into the space
  • the apparatus comprises a dryer base valve (1) which controls a supply of powder (2) by means of screw feeder (3) along a powder conduit (4). Passage of powder along powder conduit (4) is further controlled by valve (5) and the end of the powder conduit (4) extends down into a bag (25) made of substantially air-tight material for example polythene.
  • a pipe (6) supplies nitrogen gas under control of valve (7) to a purge conduit (8) which is disposed concentrically round the powder conduit (4).
  • the end of purge conduit (8) is blocked.
  • the wall of the conduit is provided with apertures (10) which communicate with the interior of an extraction conduit (11) to which is clamped a filter (13) which has an annular first part (13a) and cylindrical second part (13b).
  • the filter (13) comprises a flexible sheet made of fibres or filaments which preferably prevent the build-up of electrostatic electricity.
  • the purpose of part 13a is to permit gas to vent from the container via vent conduit (28) but at the same time to prevent the escape of any powder.
  • Extraction conduit (11) is connected through ducting (15) to air extraction valve (16) which acts in conjunction with an exhaust fan (17).
  • Ducting (15) also communicates with a ventilation system consisting of a perforated plenum (18) through a control flap valve (19).
  • conduits (4), (8), (11) and (28) is located within a metal frame (20) which is secured to the base (21) of a weighing machine.
  • the frame incorporates a return member (21) which supports a supply (22) of plastics lay-flat tubing which during the operation of the machine will be converted into filled bags.
  • the frame also supports filter (13) and an inflatable annulus (23) made of resilient material, preferably rubber.
  • a keg (24) containing a bag (25) filled with powder rests in the frame of the base (21) of the weighing machine.
  • the whole of the frame together with discharge ends of the conduits are enclosed partly by a compartment (26) made conveniently of any suitable construction material for example a plastics coated wood laminate.
  • the weight of the compartment is supported from above rather than being carried by the weigh base (21) and the side of the compartment opposite the perforated plenum (18) is open so that an operative can carry out certain operations described below.
  • Each part of the machine for example the screw feeder and various valves operate in timed relationship under the control of a control system (not shown) which requires to be programmed for each powder that has to be packaged.
  • the operation of the machine can be described conveniently as being divided into three phases.
  • the exhaust fan (17) is switched off and initially the annulus (23) is in a deflated state.
  • Valves (1), (5), (7) and (16) are all closed.
  • a supply (22) of lay-flat plastics tubing for making bags is fed on to support (20) and a keg (24) with a pre-fitted liner of plastics material is placed on the base (21) beneath the outlet of powder feed conduit (4).
  • the end of the lay-flat tube is then pulled down from support (20) and tied so as to effect closure.
  • the closed end of the tube is then pulled down further until it rests on the bottom of the keg (24).
  • the exhaust fan (17) is then switched on and valve (1) is opened. Powder now flows from dryer base valve (1) to screw feeder (3) to form a choke feed.
  • valve (16) is then opened and since the exhaust fan is operating already air is sucked out of the bag via conduit (11) thereby causing the walls of the bag to collapse and some air to enter flowing down conduit (28) and down via filter part (13A).
  • Valve (16) is then closed and valve (7) opened to allow nitrogen, under pressure, from a supply (not shown) to enter conduit (8) from pipe (6).
  • the start button of the sequencer on the weighing machine (not shown) is then operated to commence the filling operation.
  • the weighing system is set to net weighing mode after which powder feed valve (5) is opened.
  • This has the effect of starting the screw feeder (3) which supplies powder at a rate which is determined by a setting on the control system. Since the walls of the container are made of impermeable plastics material displaced gas passes through the filter part (13a) during which process any powder caught up in the stream of gas is held back by the filtering action of the member.
  • the filtered gas continues up through the space (28) between the support (20) and the conduits and discharges finally into the compartment (26). After a period the feeder is slowed until powder is being supplied at a dribble. Finally a cut-out is operated which stops the screw feeder when the required weight of powder has been delivered to the bag (25).
  • the feed valve (5) is then closed thereby isolating the feeding system from the rest of the machine.
  • the annulus is then deflated by operating a switch on the control system and valve (16) is then opened.
  • the contents of the bag (25) is subjected to negative pressure due to flow of air up the extraction conduit (11), passing inwardly through filter part (13b). This causes the wall of the bag to collapse.
  • the neck of the bag is then tied at two positions (29) and (30) one above the other above the surface (31) of the powder.
  • the keg (24) containing the filled bag is then removed from the base (21) and a new keg is placed in position.
  • the end of the lay-flat tubing (22) closed at (29) is then pulled down and positioned on the bottom of the replacement keg so as to enable the cycle of operations to be repeated.
  • the machine can be modified in different ways.
  • any conventional feeding system can be used to replace the screw feeder (3).
  • the latter is preferred on account of the precision with which it enables the powder to be delivered.
  • the powder being incombustible air can be used as a purge gas and closing of the bags can be effected by heat sealing rather than with ties.
  • the machine can also be used for filling individual bags in which case storage facilities for continuous lay-flat tubing can also be dispensed with.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Basic Packing Technique (AREA)
  • Air Transport Of Granular Materials (AREA)
  • Nozzles (AREA)
  • Sampling And Sample Adjustment (AREA)

Claims (5)

  1. Un appareil destiné à remplir un conteneur flexible à partir d'un dispositif d'alimentation en vrac (2), comprenant: une base de pesage (21) servant de support à un conteneur (25) au cours du remplissage de ce dernier; une tête de remplissage adaptée, engagée dans un joint hermétique (23) communiquant avec la partie supérieure du conteneur susdit (25) devant être rempli; un conduit (4) situé dans la tête de remplissage et permettant le passage de la poudre depuis le dispositif d'alimentation en vrac jusqu'à l'espace intérieur du conteneur susdit (25); un conduit de ventilation (28) permettant le passage du gaz depuis l'espace intérieur du conteneur susdit vers l'atmosphère extérieure; un conduit d'extraction (11) dont l'une des extrémités est raccordée à l'espace intérieur susdit et l'autre à un ventilateur d'extraction (17), et un conduit de purge (8) dont l'une des extrémités est raccordée à une alimentation en gaz de purge, son autre extrémité permettant d'alimenter l'espace intérieur du conteneur (25) en gaz de purge et étant caractérisée par le fait que le conduit de ventilation (28) permet la circulation du gaz vers l'atmosphère dans une première direction par une première section (13a) du filtre (13); par le fait que le conduit d'extraction susdit (11) contient une seconde section (13b) du filtre susdit (13), placée sur la trajectoire du flux de gaz entre l'espace intérieur et le conduit d'extraction (11); par le fait que, au cours de la purge, l'autre extrémité susdite du conduit de purge susdit (8) décharge le gaz de purge dans le conduit d'extraction (11), lequel gaz passe ensuite dans l'espace intérieur du conteneur à travers la seconde section (13b) du filtre (30) dans une direction opposée à celle du gaz extrait; et par le fait que les conduits d'extraction et de ventilation susdits sont disposés de telle manière l'un par rapport à l'autre que l'extraction du gaz par le conduit d'extraction susdit (11) provoque la pénétration de gaz ambient par le conduit de ventilation susdit (28) à travers la première section (13a) du filtre (13) dans une direction opposée à celle du flux de gaz expulsé de l'espace intérieur du conteneur (25) au cours de son remplissage.
  2. Un dispositif correspondant à la revendication 1, où le deuxième conduit est disposé de manière concentrique par rapport au premier conduit.
  3. Un dispositif correspondant aux revendications 1 ou 2, où le filtre est de forme annulaire et disposé de manière concentrique par rapport au premier et au deuxième conduits.
  4. Un dispositif correspondant à la revendication 3, où le filtre est constitué de feuilles de matériau flexible.
  5. Un dispositif correspondant à la revendication 4, où les feuilles de matériau comportent des filaments de polytétrafluoroéthylène.
EP91101245A 1990-02-08 1991-01-31 Dispositif pour distribuer de la poudre Expired - Lifetime EP0443349B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9002836 1990-02-08
GB909002836A GB9002836D0 (en) 1990-02-08 1990-02-08 Powder dispensing apparatus

Publications (2)

Publication Number Publication Date
EP0443349A1 EP0443349A1 (fr) 1991-08-28
EP0443349B1 true EP0443349B1 (fr) 1994-12-21

Family

ID=10670636

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91101245A Expired - Lifetime EP0443349B1 (fr) 1990-02-08 1991-01-31 Dispositif pour distribuer de la poudre

Country Status (4)

Country Link
EP (1) EP0443349B1 (fr)
AT (1) ATE115930T1 (fr)
DE (1) DE69106011T2 (fr)
GB (1) GB9002836D0 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5279339A (en) * 1989-09-15 1994-01-18 B.A.G. Corporation Full sack compressor
US5316056A (en) * 1991-03-14 1994-05-31 L. E. Stott Limited Powder dispensing apparatus
KR100599026B1 (ko) * 2001-07-11 2006-07-12 데구사 아게 입자상 또는 분말상 물질을 용기에 충전하기 위한 장치 및 방법
DE10223220B3 (de) * 2002-05-24 2004-02-26 Hecht Anlagenbau Gmbh Vorrichtung zum Befüllen eines mit einem Innensack ausgerüsteten Gebindes mit einem Schüttgut
CN107298190B (zh) * 2015-09-01 2022-10-21 华联机械集团有限公司 用于自动上袋灌装机的吸尘机构
CN109051039A (zh) * 2018-08-31 2018-12-21 上海和创船舶工程有限公司 一种船载粉粒料打包充氮系统及其打包充氮方法
CN112874828A (zh) * 2021-01-28 2021-06-01 江苏安捷智能制造有限公司 一种清除包装袋袋内空气装置
CN114803008B (zh) * 2022-04-14 2024-04-19 东南大学 一种无人化粉碎真空人用抗生菌素超细药粉全自动包装线

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3693672A (en) * 1970-12-16 1972-09-26 Avon Prod Inc Container filling system
DE7229123U (de) * 1972-08-05 1972-11-02 F Hesser Maschinenfab Ag Vorrichtung zum verpacken von zum stauben neigenden gutern innerhalb einer schutzgasatmosphare
FR2495102A1 (fr) * 1980-11-28 1982-06-04 Generale Engrais Sa Procede et dispositif permettant de remplir des emballages souples tels que des sacs
GB8620839D0 (en) * 1986-08-28 1986-10-08 Stott L E Powder dispensing apparatus

Also Published As

Publication number Publication date
ATE115930T1 (de) 1995-01-15
EP0443349A1 (fr) 1991-08-28
GB9002836D0 (en) 1990-04-04
DE69106011T2 (de) 1995-07-20
DE69106011D1 (de) 1995-02-02

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