CN102058011B - Screw structure of double-screw extruder - Google Patents

Screw structure of double-screw extruder Download PDF

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Publication number
CN102058011B
CN102058011B CN2010105725292A CN201010572529A CN102058011B CN 102058011 B CN102058011 B CN 102058011B CN 2010105725292 A CN2010105725292 A CN 2010105725292A CN 201010572529 A CN201010572529 A CN 201010572529A CN 102058011 B CN102058011 B CN 102058011B
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spiral
kneading block
group
screw
double
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CN102058011A (en
Inventor
郎珊珊
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Lanzhou University of Technology
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Lanzhou University of Technology
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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
    • 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
    • B29B7/46—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with more than one shaft
    • B29B7/48—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with more than one shaft with intermeshing devices, e.g. screws
    • B29B7/482—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with more than one shaft with intermeshing devices, e.g. screws provided with screw parts in addition to other mixing parts, e.g. paddles, gears, discs
    • B29B7/483—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with more than one shaft with intermeshing devices, e.g. screws provided with screw parts in addition to other mixing parts, e.g. paddles, gears, discs the other mixing parts being discs perpendicular to the screw axis
    • 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
    • B29B7/46—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with more than one shaft
    • B29B7/48—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with more than one shaft with intermeshing devices, e.g. screws
    • B29B7/482—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with more than one shaft with intermeshing devices, e.g. screws provided with screw parts in addition to other mixing parts, e.g. paddles, gears, discs
    • 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
    • B29B7/46—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with more than one shaft
    • B29B7/48—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with more than one shaft with intermeshing devices, e.g. screws
    • B29B7/488—Parts, e.g. casings, sealings; Accessories, e.g. flow controlling or throttling devices
    • B29B7/489—Screws

Abstract

The invention discloses a screw structure of a double-screw extruder, which is used for preparing wire-drawing proteins from high temperature defatted meal. A screw is a fully engaged co-rotating flat double-screw. The screw structure consists of a plurality of threaded elements and kneading blocks, and is divided into three functional areas which are a conveying area, a melting area and a metering and homogenization area respectively, wherein the conveying area for ensuring a material filling coefficient and realizing material premixing consists of single-start helixes and the kneading blocks; the melting area aiming to realize mixing, homogenization and cutting functions consists of the kneading blocks and grooving helixes; and the metering and homogenization area aiming to realize quantification and metering consists of double-start helixes and double-start cone helixes; and the screw consists of the threaded elements and the kneading blocks, and is formed by sleeving an internal spline and a spline spindle.

Description

A kind of screw-rod structure of double screw extruder
Technical field
The present invention relates to the screw-rod structure of double screw extruder, for the high temperature degreasing dregs of rice, prepare wire-drawing protein, belong to the food processing machinery field.
Background technology
China's edible plants protein resource is abundant, but effective rate of utilization is very low.The output of China's Soybean Meal in 2009 is about 3,475 ten thousand tons, wherein more than 90%, as feed, is used for the livestock products aquaculture, and approximately 5% for food industry.According to another estimation, China approximately has the peanut dregs more than 3,000,000 tons urgently to develop every year, a large amount of high temperature degreasing dregs of rice can be used as the extrusion wire-drawing protein, have not only reduced the production cost of wire-drawing protein, and have positive effect to improving liquefaction by-product utilization rate.
The technological difficulties of utilizing the high temperature degreasing dregs of rice to produce wire-drawing protein are, its NSI value only has 17% left and right, protein denaturation, difficult forming, therefore, basic material for the production of wire-drawing protein is the low-temperature defatted dregs of rice of protein concentrate, protein isolate and part at present, need complicated technique and will obtain above-mentioned these raw materials, cause production cost high.
Summary of the invention
The purpose of this invention is to provide a kind of screw-rod structure for preparing the double screw extruder of wire-drawing protein for the high temperature degreasing dregs of rice.
The present invention is a kind of screw-rod structure of double screw extruder, described screw rod is full engagement same-directional flat twin-screw, described screw-rod structure is comprised of several screwing elements and kneading block, be divided into delivery area, melting zone and metering three functional areas of homogenization zone, guarantee that filling coefficient of abrasives and the premixed delivery area of material are comprised of single head spiral and kneading block, to increase, mix, the melting zone of homogeneous and shearing function is comprised of kneading block and fluting spiral, to realize quantitatively, the metering homogenization zone of metering is comprised of twin-feed spiral and double end cone spiral, described screw rod is socketed the multiple key core axle by screwing element and kneading block by internal spline and forms, described screwing element is the forward delivery element, comprises single head spiral S1, twin-feed spiral S2, double end fluting spiral SK2, double end cone spiral SZ2, described kneading block comprises forward kneading block δ zwith reverse kneading block δ f, each screwing element with kneading block for closely to be connected, delivery area is positioned at along first section of the screw rod direction of propulsion, and the delivery area combination is: after the single head spiral group of at least 5 single head spiral S1 compositions, connect by least 3 forward kneading block δ zthe forward kneading block group formed, be connected to the single head spiral group that few 5 single head spiral S1 form afterwards again, melting zone is positioned at after the delivery area of screw rod direction of propulsion, the melting zone combination: by least 3 forward kneading block δ zconnect the double end fluting spiral group formed by least 2 double end fluting spiral SK2 after the forward kneading block group formed, then connect forward kneading block group, and then connection double end fluting spiral group, then connect forward kneading block group, then connect double end fluting spiral group, then connect again forward kneading block group, finally connect by least 3 reverse kneading block δ fthe reverse kneading block formed, the metering homogenization zone is positioned at after screw rod direction of propulsion melting zone, metering homogenization zone combination: the first uniform pitch group be comprised of maximum 3 twin-feed spiral S2 is connected with the second uniform pitch group be comprised of maximum 3 double ends cone spiral SZ2.
The invention has the beneficial effects as follows: control the variation of each amount of screw channel, make high temperature degreasing cake protein matter molecule generation sex change, lose its natural structure, and prolong the directed expansion of flow direction at the head place.Through cooling forming, finally obtain thering is the fibrillatable institutional framework again, be similar to the wire-drawing protein of mouthfeel and the outward appearance of animal muscle sample.Thereby reach the purpose that reduces costs, saves the energy.
Wire-drawing protein of the present invention is that the globulin in the high temperature degreasing dregs of rice is converted into to silk-fibroin, fibrin, and protein content is more than 55%, and fat content is low, and the nutrition full price is that the healthy food be of wide application is made raw material.
The accompanying drawing explanation
Fig. 1 is structural representation of the present invention, and Fig. 2 is the delivery area structural representation, and Fig. 3 is the melting zone structural representation, and Fig. 4 is metering homogenization zone structural representation.
Specific embodiments
As shown in Figure 1, the present invention is a kind of screw-rod structure of double screw extruder, and described screw rod is full engagement same-directional flat twin-screw, and described screw-rod structure is comprised of several screwing elements and kneading block, is divided into delivery area, melting zone and three functional areas of metering homogenization zone.As shown in Figure 2, guarantee that filling coefficient of abrasives and the premixed delivery area of material are comprised of single head spiral and kneading block.As shown in Figure 3, with the melting zone that increases mixing, homogeneous and shearing function, by kneading block and fluting spiral, formed.As shown in Figure 4, with the metering homogenization zone of realizing quantitatively, measuring, by twin-feed spiral and double end cone spiral, formed.As shown in Figure 1, Figure 2, Figure 3, Figure 4, described screw rod is socketed the multiple key core axle by screwing element and kneading block by internal spline and forms; Described screwing element is the forward delivery element, comprises single head spiral S1, twin-feed spiral S2, double end fluting spiral SK2, double end cone spiral SZ2; Described kneading block comprises forward kneading block δ zwith reverse kneading block δ f; Each screwing element with kneading block for closely to be connected; Delivery area is positioned at along first section of the screw rod direction of propulsion, and the delivery area combination is: after the single head spiral group of at least 5 single head spiral S1 compositions, connect by least 3 forward kneading block δ zthe forward kneading block group formed, be connected to the single head spiral group that few 5 single head spiral S1 form afterwards again; Melting zone is positioned at after the delivery area of screw rod direction of propulsion, the melting zone combination: by least 3 forward kneading block δ zconnect the double end fluting spiral group formed by least 3 double end fluting spiral SK2 after the forward kneading block group formed, then connect forward kneading block group, and then connection double end fluting spiral group, then connect forward kneading block group, then connect double end fluting spiral group, then connect again forward kneading block group, finally connect by least 3 reverse kneading block δ fthe reverse kneading block formed; The metering homogenization zone is positioned at after screw rod direction of propulsion melting zone, metering homogenization zone combination: the first uniform pitch group be comprised of maximum 3 twin-feed spiral S2 is connected with the second uniform pitch group be comprised of maximum 3 double ends cone spiral SZ2.Pitch in same double end fluting spiral group equates, the pitch of each double end fluting spiral group is unequal.
As shown in Figure 2, delivery area is positioned at along first section of screw rod direction of propulsion (by feed end to discharge end), and length range is: 1/3L always≤ L defeated≤ 1/2L always, L wherein defeatedfor delivery area length, L alwaysfor the screw rod overall length.
The pitch S of single head spiral S1 1span be: 64mm≤S 1≤ 88mm.Each single head spiral group is comprised of 5-6 single head spiral S1.This district's granular material is fed forward through screwing element, and because delivery area just partly is full of material usually, thereby energy is inputted and shearing is very little, and the effect of premixer has been played in longer delivery area in fact.
As shown in Figure 3, melting zone is positioned at after screw rod direction of propulsion delivery area, and length range is: 1/3L always≤ L molten≤ 1/2L always, L wherein moltenfor melting zone length.The pitch S of double end fluting spiral SK2 k2the variation span be: 20mm≤S k2≤ 44mm, double end fluting spiral group is comprised of 2-3 double end fluting spiral SK2, forward kneading block δ zwith reverse kneading block δ fstructure identical, opposite direction.This district's material is subject to the acting in conjunction of high temperature, high pressure and shearing force, melting gradually, protein molecule generation sex change.
As shown in Figure 4, the metering homogenization zone is positioned at after screw rod direction of propulsion melting zone, and length range is: 1/6L always≤ L meter≤ 1/3L always, L wherein meterfor metering homogenization zone length.The pitch S of twin-feed spiral S2 2span be: 20mm≤S 2≤ 30mm, the pitch S of double end cone spiral SZ2 z2span be: 20mm≤S z2≤ 44mm.The further homogeneous of the material of this district's molten state, and, because of the drag effect of head, screw channel is full of, measuring fixed amount, and guarantee that enough pressure support ventilation materials pass through mould.
The process of wire-drawing protein pressing organization can be described as: the high temperature degreasing dregs of rice of powdery and Gluten after premix is modified, enter in described special twin screw extruder in the Double-shaft differential quality-adjusting device, under the pressure of rotating screw bolt promotes, travel forward.While arriving screw front end, material is compacted, fills full thread pitch, and vegetable protein is subject to the acting in conjunction of high temperature, high pressure and threaded rod shear shear force, forms the viscosity dough of molten state.Protein molecule generation sex change, lose its natural structure, and streamwise is directed to launch.The melting dough is when the cooling die, and protein molecule crosslinked typing again presents quality and the architectural feature of similar animal flesh, obtains wire-drawing protein.

Claims (1)

1. a screw-rod structure for preparing the double screw extruder of wire-drawing protein for the high temperature degreasing dregs of rice, it is characterized in that: described screw rod is full engagement same-directional flat twin-screw, described screw rod is socketed the multiple key core axle by screwing element and kneading block by internal spline and forms, be divided into delivery area, melting zone and three functional areas of metering homogenization zone, described screwing element is the forward delivery element, comprises single head spiral (S1), twin-feed spiral (S2), double end fluting spiral (SK2), double end cone spiral (SZ2); Described kneading block comprises forward kneading block (δ z) and reverse kneading block (δ f); Each screwing element with kneading block for closely to be connected; Delivery area is positioned at along first section of the screw rod direction of propulsion, and the delivery area combination is: after the single head spiral group that at least 5 single head spirals (S1) form, connect by least 3 forward kneading block (δ z) the forward kneading block group that forms, be connected to again afterwards the single head spiral group that few 5 single head spirals (S1) form; Melting zone is positioned at after the delivery area of screw rod direction of propulsion, the melting zone combination: by least 3 forward kneading block (δ z) connect the double end formed by least 2 double ends fluting spirals (SK2) the spiral group of slotting after the forward kneading block group that forms, then connect forward kneading block group, and then connection double end fluting spiral group, then connect forward kneading block group, then connect double end fluting spiral group, then connect again forward kneading block group, finally connect by least 3 reverse kneading block (δ f) the reverse kneading block that forms; The metering homogenization zone is positioned at after screw rod direction of propulsion melting zone, and metering homogenization zone combination: the first uniform pitch group be comprised of maximum 3 twin-feed spirals (S2) is connected with the second uniform pitch group be comprised of maximum 3 double ends cone spirals (SZ2);
The length range of delivery area is: 1/3L always≤ L defeated≤ 1/2L always, L wherein defeatedfor delivery area length, L alwaysfor the screw rod overall length;
The length range of melting zone is: 1/3L always≤ L molten≤ 1/2L always, L wherein moltenfor melting zone length;
The metering homogenization zone is positioned at after screw rod direction of propulsion melting zone, and length range is: 1/6L always≤ L meter≤ 1/3L always, L wherein meterfor metering homogenization zone length;
Pitch (the S of single head spiral (S1) 1) span be: 64mm≤S 1≤ 88mm;
Pitch (the S of double end fluting spiral (SK2) k2) the variation span be: 20mm≤S k2≤ 44mm;
Pitch in same double end fluting spiral group equates, the pitch of each double end fluting spiral group is unequal;
Pitch (the S of twin-feed spiral (S2) 2) span is: 20mm≤S 2≤ 30mm;
Pitch (the S of double end cone spiral (SZ2) z2) span is: 20mm≤S z2≤ 44mm.
CN2010105725292A 2010-12-03 2010-12-03 Screw structure of double-screw extruder Active CN102058011B (en)

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WO2017016227A1 (en) * 2015-07-24 2017-02-02 Guangdong Industry Technical College A co-rotating self-cleaning two-screw extruder with a gradual number of threads and through self-cleaning function， and a processing method using the same

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JP6064899B2 (en) * 2012-02-07 2017-01-25 三菱レイヨン株式会社 Manufacturing method of resin kneaded material
CN102630806B (en) * 2012-04-26 2013-04-10 北京金地三福膨化机制造(大厂)有限公司 Twin screw extrusion device and extrusion type expansion machine
CN102793054B (en) * 2012-08-27 2014-04-16 浙江百川食品有限公司 Double-screw extruder for preparing textured fiber protein
JP3195388U (en) * 2014-10-31 2015-01-15 株式会社イシダ Combination weighing device
CN105901279A (en) * 2016-04-13 2016-08-31 河南曙光生物科技有限公司 Preparation method of soybean proteins
CN107788411B (en) * 2017-09-20 2021-04-16 中国肉类食品综合研究中心 High-animal-protein leisure food and preparation method thereof
CN108851151A (en) * 2018-08-17 2018-11-23 济南百脉海源膨化机械有限公司 Bulking machine Tri-screw Extrusion mechanism

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WO2017016227A1 (en) * 2015-07-24 2017-02-02 Guangdong Industry Technical College A co-rotating self-cleaning two-screw extruder with a gradual number of threads and through self-cleaning function， and a processing method using the same

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