Screw extruder

IPC classes for russian patent Screw extruder (RU 2338442):

B30B11/24 - using screws or worms

A23P1/12 - Extruding

Another patents in same IPC classes:

Method for extruding material, for example, starch containing material, and extrusion device / 2337826

Extrusion device consists of case in which there is endless screw and extrusion head with channels. The extrusion head is in form of two concentrically arranged bushes. One of them has channels and is rigidly joined to the endless screw with provision for in-out traversing. The other bushing is rigidly fixed to the case. The coupling diameter or the bushings does not exceed the diameter of the endless screw by more than 1.5 mm. The extrusion head can have a die hole and at least, one driftpin. The endless screw which turns inside the case acts on the material and presses it through channels in the extrusion head.

Method of cooking of the food stuff by extrusion / 2293024

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Press-extruder / 2266821

The invention is pertaining to equipment for processing agricultural products by extrusion and may be used in the food-processing industry. The Press-extruder contains a body of the main drive unit with a loading hopper and a feeding device, a composite feed screw and a cylindrical body of a feed screw consisting of split components. In the place of coupling of the components of the feed screw body there are the ring-type grooves for rigid fixation in them of a ring with the internal chases directed at an angle to the axis of the ring. The ring has adjustable thickness and is made in the form of several rings and washers, the total thickness of which is equal to the width of the ring-type groove. The invention ensures enhanced efficiency and stability of the extrusion process at changing of the process technological characteristics and physical-mechanical properties of the processed materials.

Screw press / 2266205

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Method for extruding material, for example, starch containing material, and extrusion device / 2337826

Method of manufacturing extruded semi-finished products (versions) / 2335999

Method of manufacturing extruded products involves extruding raw product with following cooling of the obtained puffed product. Chickpea grains are used as raw product. Prior to extruding they are ground, screened and passed through magnetic trap and then extruded. The obtained puffed product in the form of straight or crooked sticks is cooled down to the temperature of 30-40°C, dried up to the moisture weight ratio of 4-6%, ground and mixed with pumpkin powder and milk powder. The second variant of manufacturing extruded products involves extruding raw productl with following cooling of the obtained puffed product. Feature of novelty consists in fact that chickpea grains are used as raw product, prior to extruding they are ground, screened and passed through magnetic trap, mixed with concentrated milk and pumpkin puree, then extruded. The obtained puffed product in the form of straight or crooked sticks is cooled down to the temperature of 30-40°C, dried up to the moisture weight ratio of 4-6%, ground into the particles 2-3 mm in size. The stock is extruded in the extruder with worm rotation speed 38±2 s-1 during 30-40 s. Diameter of die outlet is 8 mm.

Compound for grain extruded product such as bread crisps / 2333672

Invention relates to food industry. Compound for grain extruded product production such as bread crisps contains corn flour mixture with wheat flour or with mixture of wheat and rye flour, table salt and flavouring such as fermented malt. Compound may additionally contain citric acid. Using extrusion method, the invention allows for producing item, which is by texture and organoleptical properties and to the maximum extent close to wheat or rye-wheat crisps produced by bread cutting into pieces and drying. Produced crisps are ensured with high firmness and digestibility as compared to the above conventional crisps.

Method of extrusion product manufacture / 2327391

Invention is related to technology of extrusion food products manufacture. Method includes mixing of formula components, which contain inclusive complexes of biopolymer with volatile and/or labile components, extrusion of mixture and post-extrusion processing. As biopolymer keropeptides are used with main fraction of molecular mass of 3 00-3 000 Da.

Foodstuff production method / 2323575

The method provides for making crunchy bodies based on grain wheat, dried till relative humidity 2-12%. The bodies are coated with edible coat by mixing bodies in rotating tank with coating material. The coating material consists in powdered cheese with humidity 4-10% mixed with powdered flavor additives (FA) and dried bread flour with humidity 4-7%, obtained by grinding dried bread or dried bread crumbs till particles 20-200 μm. The mixed ingredient proportion (mass fraction %) is: powdered cheese 80-65, dried bread flour 15-25, flavor additive 5-10. The mixture of powdered cheese, dried bread flour and flavor additives is applied on bodies heated till the temperature 120-150°C.

Pulp-like concentrates production line / 2320244

Line for producing of pulp-like concentrates from fruit, berries and vegetables has process hoppers, washing machine, and sorting-and-inspecting conveyor. Downstream from sorting-and-inspecting machine are sequentially positioned horizontal screw press with inclined netted water separator, belt drier, reservoirs for storage of food additives such as sugar syrup, aromatizers, structuring agents, volumetric dispensers positioned in lower part of reservoirs, apparatus for fine dispersion application of said additives by means of nozzles onto surface of dried product, and vertical extruder with vacuum chamber. Production line of such construction allows pulp-like concentrates rich in fats, vitamins, etc to be produced.

Combined apparatus for continuous production of pulp-like concentrates / 2319426

Apparatus has charging hopper with transportation screw, casing incorporating two coaxial shafts and three chambers communicating with each other, of which chambers first and second chambers are made conical and third chamber is made cylindrical. In first chamber there is feeding coil mounted on high-speed shaft, and vertically mounted knives, with rotational angle of said knives enabling movement of product along chamber. Lower part of first chamber is made perforated and is connected to juice collector. In second chamber there is low-speed shaft with screw having two coils, first of said coils being made perforated and second coil being continuous. Two branch pipes are positioned in the vicinity of second chamber, said branch pipes being designed for introducing of steam and additional components such as sugar syrup, aromatizers, and structuring agents. Immovable grid with openings is provided at the end of second chamber. There is low-speed shaft in third chamber, said shaft having diameter increasing toward charging opening, and variable-pitch screw is mounted on said shaft. There is immovable grid with openings at the end of third chamber. Casing of third chamber is equipped at its outside with tubular insulated electric heaters. Cylindrical-conical vacuum chamber is attached to discharge unit of third chamber. Vertical shaft mounted within vacuum chamber has frame mixer fixed in conical part of said chamber, and screw. Steam chamber disposed on the outside of conical part of vacuum chamber is provided with steam feeding branch pipe and condensate discharge branch pipe. In lower part of vacuum chamber there is sluice-type vacuum gate, in cylindrical part of vacuum chamber there is branch pipe for removal of evaporated steam.

Line for obtaining of extruded products / 2315535

Line has charging hopper, mixer, apparatus for preliminary hydrothermal processing of basic material, extruder, granule cutting knife, sieve, crusher, and cyclone. Mixer and said apparatus are made as single horizontal trough-shaped housing with branch pipes for feeding of steam into housing within which is positioned rotating perforated screw for directing of steam into casing. Charging device of extruder is designed for movement on extruder casing surface. Sieve-cooler is made in the form of cylindrical inclined casing with extruded product feeding device, cooling air feeding branch pipes, and branch pipes for discharge of used air containing dust fractions. Rotating cylindrical two-sectioned perforated drum is positioned within sieve-cooler, with first section having smaller perforations and second section having perforations corresponding to standard diameter of extruded products. Lower part of sieve-cooler casing is divided into two discharge hoppers, first section of perforated drum having smaller perforations is disposed above first discharge hopper, and second section of perforated drum having perforations for standard extruded products is disposed above second discharge hopper. Ready product is charged on automatic charging machine into packages which are then stacked and fed into boxes on automatic packaging machine. Large-sized fraction of extruded products is delivered from inclined cylindrical drum to be then ground in grinder and directed into intermediate hopper-accumulator, and small-sized fraction is directed into intermediate hopper-accumulator. Used air in conjunction with dust fractions is discharged from sieve-cooler and fed into cyclone, wherein said fractions are caught and directed into intermediate hopper-accumulator, to be then delivered from it into conditioner for steam treatment and fed into extruder for repeated forming.

Extruder / 2314918

The invention is pertaining to the devices used for extrusive treatment of the foodstuffs and may be used for production of the extruded foodstuffs, and also in other branches of industry applying extrusion. The extruder contains the body, the molding head, the feed screw, the distributor and the tubes for inlet of the prescription components. The distributor is installed in the molding head and divides it into the independent from each other parallel zones. At the inlet into each zone there are the mounted lattices with the tubes for injection of the prescription components. The outlet holes of the tubes are directed towards the motion of the extrudate melt. In each of the zones there are the stationary vortex generators of the stream. On the outlet of each zone there are the mounted spinnerets of the different configuration. The invention allows to dilate the technological capabilities of the extruder, to reduce the costs of its operation.

Method for producing of extruded foods / 2313953

Method involves mixing basic products and extruding resultant mixture, with wheat and beans being used as basic products; grinding products to 0.32-0.63 mm sized particles; mixing in 3:2 proportion; wetting to 14-18% moisture content; processing in extruder with temperature of product in front of die making 420-435 K and pressure in extruder zone upstream of die making 6.5-7.0 MPa.

Method for utilizing of food wastes with high moisture content / 2248720

Method involves mixing grain wastes and distillery dregs to moisture content of from 24% to 28% and extruding through die equipped with at least one spinneret; cooling mixture and drying in flow of air blown through extrudate layer; providing required moisture content by altering share of grain wastes. Air temperature may be lower or higher than ambient air temperature. Method provides for increased shelf life due to reduced moisture content of product owing to joint usage of conductive heat exchange, cooling and drying to moisture content lower than critical value allowing product to be canned.

FIELD: engines and pumps.

SUBSTANCE: screw extruder incorporates a cylindrical pressing casing with a main head arranged to translate relative to the pressing casing, a main head torque measuring device, a loading device coupled with the pressing casing and a pressing screw with the mixer and the screw drive. The said mixer represents a non-conducting material cylindrical casing with the a conducting shell arranged on its inner surface and a cylindrical head arranged to move relative to the mixer cylindrical casing and the conducting working member coupled with the mixer drive. The extruder comprises also a mixer cylindrical head torque measuring device, a flour and water proportioners. Note here that the said mixer is coupled with the loading device, while the conducting working member and conducting shell are connected to the industrial-frequency current supply source.

EFFECT: reduced power consumption, higher homogeneity quality of finished products.

3 cl, 1 dwg

The invention relates to the extrusion technique and is intended for the production of food products using extrusion, in particular confectionery, pasta, semi-expanded extrudates.

Known screw extruder [RF patent №2147995, published in BI No. 12, 2000], which includes a cylindrical plunger body, ending with the forming head, made with a possibility of free movement relative to the plunger housing and provided with a device for measuring torque loading device and pressing screw.

The disadvantages of this design of the extruder are very energy intensive process, lack of uniformity and poor quality of finished products, the lack of an operational quality control and automatic process control.

The technical result of the invention is to reduce the energy intensity of the process, improving the uniformity and quality of finished products, operational quality control, the automatic control system processes.

The technical result is achieved in that a screw extruder for the production of food products containing cylindrical pressure housing with the forming head, made with a possibility of free movement relative to the plunger housing, the device DL is the measurement of torque forming head, the boot device is connected to the pressure housing, the pressure auger drive auger equipped with a drive mixer, made in the form of a cylindrical body of electroconductive material located on the surface of a conductive shell and a cylindrical nozzle having the ability to freely move relative to the cylindrical body of the mixer, the conductive working body connected to the drive of the mixer, dosing flour and water, while the mixer is connected with the charging device, and conductive working body and the conductive shell connected with a source of electric current of industrial frequency.

Device for measuring torque forming head and measure the torque of the cylindrical baffle is made in the form of a thin metal plate with two pasted from opposite sides of the load cell.

It is equipped with a device for automatic control of the processes of mixing and extrusion containing connected to the computer digital to analog Converter connected to the actuators of the drive screw, the drive of the mixer, water dispenser, source of electric current of industrial frequency and with devices for measuring torque forming head and a cylindrical NASA is key mixer.

The drawing shows a diagram of the extruder of the proposed design.

Screw extruder contains: water dispenser 1 dispenser flour 2 mixer 3 mixer drive 4, the conductive working body 5 of the mixer 3, a conductive shell 6, the housing 7 of the electroconductive material, a cylindrical nozzle 8 of the mixer 3, the device for measuring torque of the cylindrical baffle 9, the flexible element 10, a cylindrical plunger body 11, the pressure screw 12, the forming head 13, the device for measuring torque forming head 14, the loading device 15, an analog-to-digital Converter 16, the computer 17, a d / a Converter 18, the actuator 19, the actuator pressure the screw 20, a source of electric current of industrial frequency 21.

The extruder operates as follows. Water and flour is fed into the mixer 3 feeder 1 and feeder 2, where mechanical mixing products with simultaneous electrical contact processing.

The source of electric current of industrial frequency 21 provides a flow of electric current through the conductive working body 5 of the mixer 3 and the conductive shell 6, the casing 7 of the electroconductive material. Under the action of electric current in the mixer 3 water particles rapidly penetrate deep into the solid particles, which is riodic to a significant increase in the uniformity of mix mass. Stir the pulp goes to the boot device 15 through a cylindrical nozzle 8 of the mixer 3 at the end of the housing 7 of the electroconductive material. Torque from the conductive working body 5 of the mixer 3 through the processed material is passed cylindrical nozzle 8 of the mixer 3. According to the degree of torsion of cylindrical nozzles 8 of the mixer 3, as measured by the device for measuring torque of the cylindrical baffle 9, it is possible to judge the rheological characteristics of the product at the outlet of the mixer 3 and as a consequence on the quality of the intermediate product.

Then the product through the loading device 15 enters the cylindrical plunger housing 11 and is transported by conveyor screw 12 to the forming head 13. Due to the back pressure side of the matrix forming head 13 and the forces of friction recyclable material hardens and turns into a plastic-viscous mass. Due to the adhesive-cohesive interactions torque from the pressure of the screw 12 by means of material to be processed is transferred to the forming head 13. According to the degree of torsion of the forming head 13, as measured by the device for measuring torque forming head 14, it is possible to judge the viscosity of the product at the outlet of the extruder and, as a consequence, the quality of manufactured products : the I.

Signals received from the device for measuring torque of the cylindrical baffle 9 and the device for measuring torque forming head 14, is recorded on the analog-to-digital Converter 16 and transmitted to the computer 17, which is converted into the numerical values of the measured value that is recorded in the form of array data and graphics depending on the time in the file. Data is processed by a special program that generates signals that are passed through the d / a Converter 18 to the actuators 19, regulating the water dispenser 1, the mixer drive 4, drive conveyor screw 20, a source of electric current of industrial frequency 21.

Thus, in comparison with the prototype, the proposed design of the extruder resulting from the use of an additional mixer, electric current, when mixed, can improve the quality of the product, and the measurement of torque output from the mixer and extruder allows you to judge the quality of the product with the possibility of further regulation processes.

The use of strain sensors in the device for measuring torque and the output data to a computer allows you to quickly judge the quality of the product with the possibility of further regulation processes./p>

The application of data about the quality of the products at the exit of the mixer and the extruder and sending signals to the actuators of the working elements of the extruder allows you to automatically adjust the quality of the final product.

1. Screw extruder for the production of food products containing cylindrical pressure housing with the forming head, made with a possibility of free movement relative to the plunger housing, a device for measuring torque forming head, the boot device is connected to the pressure housing, the pressure screw, drive screw, characterized in that it is equipped with a drive mixer, made in the form of a cylindrical body of electroconductive material located on the surface of a conductive shell and a cylindrical nozzle having the ability to freely move relative to the cylindrical body of the mixer, the conductive working body connected to the drive of the mixer, dosing of flour and water, with the mixer is connected with the charging device, and conductive working body and the conductive shell connected with a source of electric current of industrial frequency.

2. The screw extruder according to claim 1, characterized in that each of the devices for measuring torque momenteraly head and measure the torque of the cylindrical baffle is made in the form of a thin metal plate with two pasted from opposite sides of the load cell.

3. The screw extruder according to claim 2, characterized in that it is equipped with automatic control device processes mixing and extruding containing connected to the computer digital to analog Converter connected to the actuators of the drive screw, the drive of the mixer, water dispenser, source of electric current of industrial frequency and with devices for measuring torque forming head and a cylindrical baffle.