Classifications

• • A—HUMAN NECESSITIES
  • A21—BAKING; EDIBLE DOUGHS
  • A21C—MACHINES OR EQUIPMENT FOR MAKING OR PROCESSING DOUGHS; HANDLING BAKED ARTICLES MADE FROM DOUGH
  • A21C1/00—Mixing or kneading machines for the preparation of dough
  • A21C1/02—Mixing or kneading machines for the preparation of dough with vertically-mounted tools; Machines for whipping or beating
• • A—HUMAN NECESSITIES
  • A21—BAKING; EDIBLE DOUGHS
  • A21C—MACHINES OR EQUIPMENT FOR MAKING OR PROCESSING DOUGHS; HANDLING BAKED ARTICLES MADE FROM DOUGH
  • A21C1/00—Mixing or kneading machines for the preparation of dough
  • A21C1/14—Structural elements of mixing or kneading machines; Parts; Accessories
  • A21C1/142—Feeding mechanisms, e.g. skip lifting mechanisms
  • A21C1/1425—Feeding mechanisms, e.g. skip lifting mechanisms for feeding in measured doses
• • A—HUMAN NECESSITIES
  • A21—BAKING; EDIBLE DOUGHS
  • A21C—MACHINES OR EQUIPMENT FOR MAKING OR PROCESSING DOUGHS; HANDLING BAKED ARTICLES MADE FROM DOUGH
  • A21C1/00—Mixing or kneading machines for the preparation of dough
  • A21C1/14—Structural elements of mixing or kneading machines; Parts; Accessories
  • A21C1/144—Discharge mechanisms
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
  • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
  • B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
  • B01F27/90—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis with paddles or arms 
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
  • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
  • B01F35/71—Feed mechanisms
  • B01F35/714—Feed mechanisms for feeding predetermined amounts
  • B01F35/7141—Feed mechanisms for feeding predetermined amounts using measuring chambers moving between a loading and unloading position, e.g. reciprocating feed frames
  • B01F35/71411—Feed mechanisms for feeding predetermined amounts using measuring chambers moving between a loading and unloading position, e.g. reciprocating feed frames rotating or oscillating about an axis
  • B01F35/714111—Feed mechanisms for feeding predetermined amounts using measuring chambers moving between a loading and unloading position, e.g. reciprocating feed frames rotating or oscillating about an axis the measuring chambers being pockets on the circumference of a drum rotating about a horizontal axis with discharging by gravity
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
  • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
  • B01F27/05—Stirrers
  • B01F27/07—Stirrers characterised by their mounting on the shaft
  • B01F27/072—Stirrers characterised by their mounting on the shaft characterised by the disposition of the stirrers with respect to the rotating axis
  • B01F27/0723—Stirrers characterised by their mounting on the shaft characterised by the disposition of the stirrers with respect to the rotating axis oblique with respect to the rotating axis
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
  • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
  • B01F27/05—Stirrers
  • B01F27/07—Stirrers characterised by their mounting on the shaft
  • B01F27/072—Stirrers characterised by their mounting on the shaft characterised by the disposition of the stirrers with respect to the rotating axis
  • B01F27/0724—Stirrers characterised by their mounting on the shaft characterised by the disposition of the stirrers with respect to the rotating axis directly mounted on the rotating axis

Definitions

• the invention relates to a method and to the corresponding device for metering and introducing flour-like and liquid ingredients into a kneading machine for the production of small amounts of dough, in particular portions of dough which is suitable for the preparation of flatbreads, individual pizzas and the like.
• the invention has for its object to provide a method and a corresponding device for metering and introducing ingredients into a kneading machine, which is suitable for the production of small amounts of dough, the device being simple in structure, easily dismantled and cleanable and the method being suitable dosing quantities of considerable precision must be guaranteed so that any dosing errors are very limited and do not lead to the dough being unsuitable for subsequent processing or do not lead to a noticeable difference in the quality of the end product.
• the invention proposes a dosing device with a measuring cup for the flour-like ingredients, which is equipped with a plunger and which can possibly be loaded to different filling levels, furthermore this measuring cup also serves to introduce the dose into the kneading machine; for the liquid ingredients, on the other hand, a metering device is proposed which works on a slope and has a double-acting valve which, in the lower working position, fills the volume which can be calibrated in terms of volume
• Measuring cup allows in the following upper working position the outflow of the dose of liquid by releasing the inflow of filtered outside air.
• the measuring cup for the flour-like ingredients preferably has a cylindrical shape and is installed between the cylindrical container for the flour and the upper opening of the kneading machine equipped with an adjustable slide.
• the cylindrical measuring cup is attached in the circumferential area of the circular bottom of the cylindrical flour container and is progressively filled by a rotating spoke wheel driven by an electric motor.
• Spoked wheel rests on the bottom of the container and is rotatably mounted coaxially in the cylindrical container together with stirring elements.
• the free spaces between the radially projecting spokes, which correspond approximately to the circular cross-section of the measuring cup, are filled by the flour which is stored in the container above; by turning the spoke wheel, the flour is brought into the area above the cylindrical measuring cup where it falls freely down into the measuring cup.
• a pestle provided above the measuring cup is activated to compress the flour contained in the measuring cup. Then, with the plunger raised, the spoke wheel is driven again in order to fill up the free space which has formed due to the compression by the plunger with flour. These operations may be repeated several times until the measuring cup is filled to the brim with flour, the degree of compression of the flour depending on the number of compression cycles of the pestle. With a further rotation of the spoke wheel, the flour dose is scraped off to the edge of the measuring cup, whereupon the slide of the loading opening of the kneading machine opens and the flour dose is pushed out of the measuring cup through the pestle to fall into the kneading space.
• the movement of the spoke wheel is synchronous to the movement of the plunger and to fill the measuring cup with flour, you can first turn it by a certain angle so that the measuring cup is completely filled, after a compression chamfer by the plunger there is a further rotation of the spoke wheel possibly smaller angle and finally, after filling and compression, the content is scraped off to the edge of the measuring cup by rotating it again.
• This dosing method enables constant, remarkably precise flour dosing quantities to be obtained with the possibility of varying the number of compression cycles on the basis of the flour properties.
• the precision of the flour dosing is improved in that a measuring cup with a preferably telescopically variable volume is provided instead of the measuring cup with a predetermined measuring volume and on the flour container and / or on Measuring cup the weight of the flour dose taken from the flour container is raised.
• a measuring cup with a preferably telescopically variable volume is provided instead of the measuring cup with a predetermined measuring volume and on the flour container and / or on Measuring cup the weight of the flour dose taken from the flour container is raised.
• the weight of the flour dose taken from the flour container is raised.
• the dosing process with determining the weight and changing the volume of the measuring cup is based on the empirical calculation of the volume of the measuring cup, taking primarily the granulation of the flour into account, or by determining the volume on the basis of tables compiled by weight / volume measurements of the dosing pattern.
• a first dosing process is carried out with the weight of the flour taken from the flour container for dosing.
• An electronic calculation program calculates the correction of the originally set volume of the measuring cup and thus the positive or negative change in the volume from the comparison between the desired weight of the flour dose and the weight raised.
• This process of checking the weight and adjusting the volume takes place in the subsequent dosing processes until a weight value is reached which, within narrow tolerance ranges, is very close to the target value. Subsequent to this adjustment phase of the volume of the measuring cup in order to reach the target value of the flour dose, checks can be carried out for each dosing process or for cycles of several dosing processes in order to repeatedly aim at the target value.
• the weight is collected directly on the measuring cup, there is the possibility of correcting the same dose at which the weight was raised by telescopically changing the volume, in the case of excess weight, by subsequently using the one already described Scraping process is repeated or, if there is a lack of weight, by repeating the filling process, the pressing process by the ram and the scraping process.
• the invention does not exclude the manual change in the volume of the measuring cup, which is optionally provided with a measuring scale.
• the change in the volume of the measuring cup also makes it possible to change the dose if necessary, with a high precision of the weight determination also always being provided for this dose.
• the metering device for water or for the liquid ingredients consists of a measuring cup which has an opening in the upper area for the inflow through a gradient from a water container and a valve for the inflow of filtered atmospheric air, while the same measuring cup is in the lower area has a drain opening.
• a double-acting valve which is operated by axial, e.g. pneumatic, moving the inflow and outflow of water and controlling the valve for the inflow of atmospheric air.
• the filling quantity of the measuring cup can be varied by inserting rings inside the measuring cup, which have different volumes.
• the double-acting valve can be actuated by a pneumatic piston which can be displaced in a cylinder which is coaxial with the measuring cup and is provided below the discharge opening.
• the piston rod which connects the piston to the double-acting valve, is tubular and the discharge takes place through the piston rod.
• the cylinder for the pneumatic piston is arranged coaxially above the measuring cup and in this case the piston rod which moves the double-acting valve can have a full cross section.
• the valve for the inflow of atmospheric air which causes the liquid dose to flow freely from the measuring cup to the kneading machine, is actuated by the double-acting valve itself, which has an annular shape protruding collar which, in its upward movement and thus upon opening of the discharge opening, meets the rod of the valve for the air supply and, by compressing an adjustable spring for returning the valve to the closed position, opens the valve.
• the valve for the supply of atmospheric air By opening the valve for the supply of atmospheric air into the measuring cup, the liquid dose can flow freely downwards towards the kneading machine.
• the coaxial arrangement between the measuring cup, its head part, the valve body and the actuating piston enables a simple structure which enables disassembly and assembly without tools and easy cleaning.
• Fig. 1 shows a schematic front view and partly in section of a kneading machine which is connected to a device according to the invention for the metering and the introduction of flour-like and liquid ingredients.
• Fig. 2 shows schematically and on an enlarged scale the device shown in Fig. 1 for metering and introducing the liquid ingredients in the loading phase with the double-acting valve in the lower working position, the inflow is free and the outflow is closed.
• FIG. 3 shows the device shown in Fig. 2 for the metering and introduction of liquid ingredients with the double-acting valve in the upper working position, the inflow of the liquid being interrupted and the outflow of the liquid dose from the measuring cup and the inflow of atmospheric air in the measuring cups are open.
• FIG. 4 is a sectional view according to the sectional plane IV-IV shown in FIG. 1, which runs horizontally through the container for the flour-like ingredients with the dosing and introducing device according to the invention.
• the cutting plane be it the axis of the measuring cup or that of the threaded spindle for the adjustment of the movable part of the measuring cup.
• the kneading machine C is provided in the upper area with a slide 19 for opening and closing the introduction opening for the flour-like ingredients, while axially a delivery hose 18b is provided for the liquid ingredients.
• a shaft 5a is rotatably supported R, coaxial to the axis of the container A; this shaft carries at the upper end a coaxial tubular element 7a which is equipped with radially projecting stirring elements 8a while at the lower end of the tubular element a spoke wheel 9a resting on the bottom 2a is fastened as a loading device with spokes 9e and free spaces 9d.
• the shaft 5a is provided with a pulley 6a which is driven by a motor (not shown).
• Rotation R of the shaft 5a moves the spoke wheel 9a, which functions as a loading device, through the tubular element 7a, whereby the flour F, which fills the free spaces 9d between the spokes 9e by gravity, is pushed over the upper filling opening of the measuring cup 11a provided underneath; the flour falls down and progressively fills the measuring cup 11a.
• the loading device 9a With one of the free spaces 9d corresponding to the position of the upper filling opening of the measuring cup 11a, is stopped and the flour contained in the measuring cup by movement V of the rod 13a of the plunger 12a by means of a cylinder 14a, compressed in the measuring cup.
• the flour dose is pushed out of the measuring cup by the plunger in order to fall into the kneading machine.
• the flour dose can be changed by changing the number of compression cycles of the plunger; however, the possibility is not excluded to change the dose by changing the pressure force of the plunger and / or by changing the level of the flour inside the measuring cup 11.
• the flour measuring cup with unchangeable volume 11a can be replaced by a measuring cup 20 with telescopically changeable volume 20c which, like the measuring cup with unchangeable volume 11a, is attached to the bottom 2a of the container A for the flour F and in the same way is filled.
• the measuring cup 20 with variable volume consists of a stationary cylindrical upper part 20a to which a lower cylindrical part 20b, axially adjustable 20c, is coaxially attached. This part is fastened to a carrier element 24 which is moved by motor 21, the motor being held by a fixed carrier element 27 and moving a screw nut 23 fastened to the carrier element 24 via a rotatable 22a threaded spindle 22.
• the bottom of the measuring cup 20 consists of a movable, e.g. slide 25, which can be displaced in horizontal guides at the lower end of the movable 20a measuring cup 20b.
• a tubular connecting piece 26 is provided as a connection to the feed opening of the kneading machine C below.
• the mechanism for changing the volume of the measuring cup 20 is electronically connected to the device for weight measurement of the dose of flour F which has been removed from the flour container A. In this way it is possible, using a program of weight comparison and weight correction, to correct the volume of the measuring cup, based on the weight of the previously removed flour dose, by a few
• the dosing system with Weight checking and correction of the volume of the measuring cup 20 makes it possible, above all, to eliminate dosing errors which are caused by differences in the granulation and / or in the moisture and in the pressure which is caused by the flour in the flour cup in the phase of filling the measuring cup 20.
• the water, or the liquid ingredients W are measured by the metering device B, which consists of a cylindrical body with an upper measuring cup 5b closed by a head part 15d; the lower region has a cylinder 1b, closed by head part 4f, in which a piston 3b is moved D - S by compressed air P - P1, which is introduced into the cavity 4b of the cylinder 1b via the openings 4d, 4e.
• the piston 3b is connected to a tubular piston rod 2b, the upper end of which carries a double-acting valve which consists of the body 7b with an upper seal 11b, a lower seal 12b and a radially projecting collar 10b.
• the water or the liquid ingredients W can fall through a gradient from a higher-lying container, via a connecting piece 13b into the space of the, by inserting one or more rings 5d calibratable, flow measuring cup 5b; the air contained in the measuring room flows through the connection piece 13b into the higher water tank.
• the outflow of the water W into the kneading machine C is interrupted by the seal 12b.
• the piston 3b is moved upwards, in order to move the body of the double-acting valve 7b upward via the tubular piston rod 2b and thereby lift the seal 12b out of its seat in order to To discharge the liquid dose W through the bores 6b, the hollow space of the tubular piston rod 2b, the discharge pipe 14b and the connecting pipe 18b into the kneading machine C.
• the discharge of the liquid dose W takes place only as a result of actuation O of the valve 8b for the inflow of the filtered atmospheric air L through the opening 16b, the valve rod 9a being followed by the collar 10b which projects radially from the body 7b of the double-acting valve during the stroke above, actuated.
• This stroke also interrupts the inflow of the liquid W from the container through the action of the seal 11b in the corresponding seat in the head part 15b of the measuring cup 5b. This takes place during the subsequent loading of the measuring cup 5b (FIG. 2)
• the invention does not rule out that the cylinder 4b and the corresponding piston 3b are arranged coaxially above the measuring cup 5b with the head part 15b; in this case the outflow from the measuring cup 5b will take place through a simple nozzle with an internal seat for the lower seal 12b of the valve 7b.

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• Life Sciences & Earth Sciences (AREA)
• Engineering & Computer Science (AREA)
• Food Science & Technology (AREA)
• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Manufacturing And Processing Devices For Dough (AREA)
• Food-Manufacturing Devices (AREA)
• Basic Packing Technique (AREA)
• Confectionery (AREA)
• Seeds, Soups, And Other Foods (AREA)

Priority Applications (6)

Applications Claiming Priority (2)

Publications (1)

Family

ID=29716845

Family Applications (1)

Country Status (8)

Cited By (3)

Families Citing this family (12)

Citations (5)

• 2002
  • 2002-06-27 EP EP02014308A patent/EP1374683A1/de not_active Withdrawn
• 2003
  • 2003-06-16 WO PCT/EP2003/006336 patent/WO2004002228A1/de not_active Ceased
  • 2003-06-16 AT AT03761469T patent/ATE443992T1/de not_active IP Right Cessation
  • 2003-06-16 CN CN038147572A patent/CN1662143A/zh active Pending
  • 2003-06-16 AU AU2003246442A patent/AU2003246442A1/en not_active Abandoned
  • 2003-06-16 EP EP03761469A patent/EP1515611B1/de not_active Expired - Lifetime
  • 2003-06-16 BR BR0305245-1A patent/BR0305245A/pt not_active IP Right Cessation
  • 2003-06-16 DE DE50311969T patent/DE50311969D1/de not_active Expired - Lifetime
  • 2003-06-16 JP JP2004516604A patent/JP4388472B2/ja not_active Expired - Fee Related

Patent Citations (6)

Non-Patent Citations (2)

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