• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    An internal mixing apparatus for mixing plastic materials, especially raw rubber, has a mixing chamber defined by substantially parallel cylindrical individual chambers. Each of these chambers holds a rotating shaft and the two shafts rotate in opposite directions. In one embodiment of the invention, the shafts have a cylindrical outer surface on which is disposed at least one principal conveying and mixing vane. The vanes on the two parallel shafts are disposed in mirror symmetry so that the ridges of the vanes roll off against one another with or without contact. The principal vanes terminate ahead of the end faces of the mixing chamber, thereby defining free passages permitting the transverse motion of the material to be mixed. Within these passages, the shafts carry scraping vanes for preventing the accumulation of stationary material. In another embodiment of the invention, the vane cores are conical and the height of the vanes changes continuously so that the wall clearance between the ridges of the vanes and the internal walls of the mixing chamber change as a function of axial distance, defining high pressure and low pressure zones. In the high pressure zones, the wall clearance is large, permitting substantial tangential material flow. In a third embodiment of the invention, the vanes on the two shafts interleave, one solid vane engaging an interruption of the opposite vane.
    公开号:SU967268A3
    申请号:SU792790957
    申请日:1979-08-06
    公开日:1982-10-15
    发明作者:Видманн Вернер；Шмид Ханнс-Мартин
    申请人:Вернер Унд Пфляйдерер (Фирма)；
    IPC主号:
    专利说明:

    The rotors are axially configured with a conical configuration, and the gap between the crest of at least one blade and the inner side wall of the chamber is selected variable along the length of the rotor. The angle of inclination of the blade to the longitudinal axis of the rotor is equal to 554-5 °. the projection of each of the blades is selected within 0.50, 7 of the length of the internal cavity of the mixing chamber between its end walls. In addition, each of the rotors is provided with an additional feed mixing blade located parallel to the feed mixing blade and displaced relative to the latter on the rotor body, the additional paddle having a length equal to the length of the rotor, and has an opening for entry of the other feed rotor . At the same time, the length of each of the through-face butt holes is chosen within the limits of 0.15-0.35 of the length of the internal cavity of the mixing chamber between its end walls. In Fig.1 schematically shows the proposed mixer, a General view; Fig. 2 shows the mixing chamber, the cross section (the first embodiment); figure 3 - section aa in figure 2; 4 - mixing chamber, cross section (second embodiment); figure 5 is a resolution of BB in figure 4; fig.b is a mixing chamber, cross section (third embodiment); N. Fig.7.- cut B-B in Fig.6; 8, 9, 10, the sweep of the blades of the first, second and third versions of the rotors, respectively. The mixer contains a housing consisting of the upper part 1 and the lower part 2 mounted on the bed 3 In the case there is a KciMepa 4 mixing room, the inner side walls 5, which have the form of two axially parallel and horizontal cylinders tangent to each other or to a minor extent into each other. Near the walls 5, b of the mixing chamber 4, cooling channels 7 are provided in the upper part 1 and the lower part 2. To supply the mixed material into the mixing chamber 4 under pressure, a piston 8 is actuated through a piston rod 9 of a working hydraulic cylinder (not shown). In the upper position of the piston, the material to be mixed, for example, the rubber mixture, is introduced through the inclined loading valve 10 shown in dashed lines in the open position. Powder components, in particular various additives, can be added to the base material through the other loading opening 11. In the mixing chamber 4, along it, shafts 12, 13 are concentric with each inner side wall 5 or b in such a way that their longitudinal axes are in a horizontal plane mutually parallel. Rotors 14 and 15 are mounted on shafts 12, 13 (shown in Fig. 1 schematically). The lower seat of the mixing chamber 4 is designed as a swivel seat 18 that can be turned down around axis 16 and held in the upper working position with the help of fixing device 19 hydraulically driven. Through the folding seat 18 closed in the working position, as shown in FIG. 1, the lower opening 20, the mixing chamber 4 is deflated after the mixing process. The shafts 12, 13 of the rotors 14, 15 are driven in opposite directions of rotation according to arrows 1, 21, 22, the rotors 14 and 15, and the shafts 12, 13 move down in the adjacent or contact area. The shafts 12, 13 are mounted for rotation, respectively, in the supports 23, 24 placed on the end walls 25, 26, which close the mixing chamber 4 from the end face. The drive is carried out in the usual way by an engine (not shown) through a junction box (not shown). The separation plane of the upper part 1 and the lower part 2 of the housing coincides with the plane passing through the longitudinal axes of the rotors 14, 15. In the first embodiment (FIGS. 2, 3, 8) the rotors 14, 15 have a cylindrical shape and are made as long as the length L of the inner plane of the mixing chamber 4. In this case, a running clearance is made on each end side. Each of the rotors 14 and 15 has two main feed mixing blades 27, 28 and 29, 30, respectively. Both pairs of blades are opposite to each other. The blades 27, 28 and (Fig. 2) have a cross section such that their front surface in the direction of rotation (arrows 21 and 22) side surface 31 and 32 and rear side surface 33, 34, respectively, have a convex truss. The front side surfaces 35, 36 of the blades 29 and 30 and the rear side surfaces 37, 38, respectively, are shaped, similarly to the blades m 27, 28. The blades 27, 28 on the rotor 14 on the one side and the blades 29, 30 on the other side of the rotor 15 are arranged so that KaxotfcJEs two blades 27, 29; blades 28, 30 form a pair that is rotatably installed relative to each other along a tangent, i.e. the ridges 39, 40, respectively, in each pair of blades 27, 29 and 28, 30 are mounted with the possibility of covering each other. In order to limit the throughput end openings: 41 between the rotors 14, 15, from the side of the flow, the blades 27, 28, and 29, 30 are made respectively with front pads 42. These pads are located parallel to the front Wall 25, 26 Kömmer. The blades 2T-30 are located at an angle to the longitudinal axis of the rotors (FIG. 8), which is chosen to be at least 50, namely 55t5. The length L of the internal cavity of the mixing chamber between its end walls and the walls is selected within 1 ,, its internal diameter D. Ylin’s projection of the blade onto the longitudinal axis of the rotor is chosen to be at least 0.5, namely, within 0.5-0 , 7 length L. The gap S between the ridge of each of the blades 27, 28 and 29, 30 and the inner side wall 5 and 6, respectively, is chosen to be at least 0.02, namely 0.0275tO, 0075 of diameter D. The length a of each of the through end openings of the openings 41 are selected in the range of 0.15-0.35 length L. For each of the end openings of the openings 41 the rotational directions along arrows 21 and 22 are set to start cadies on the corresponding end side of the rotor 14 and 15 scraper 43. The length C of the projection of each of the scrapers 43 onto the longitudinal axis of the rotor is at least equal to a, or slightly, larger than a, which is more appropriate It prevents the formation of stagnant zones when the material is mixed. In; The second version (Figures 4, 5, 9) of the rotors 14, 15, mounted respectively on the shafts 12, 13, are axially configured with a conical configuration, with an angle (selected as 80. On each of the rotors 14, 15, more) respectively, the main feed-mixing mixer blade 44 and 45, each of which, on its corresponding end wall 26 and 25, limits the passage opening 47 along the axis equal to a with its front end with the end pad 46 on the side of the flow leakage side. 44 and 45 end on certain Om away from the corresponding end wall of the chamber. Behind each of the through holes 47 on the glass flow side is located in the direction of rotation in arrows 21, 22 also a scraper 48. In addition, on each rotor 14, 15 there is one main supply and mixing blade 49, 50, which extends from the end side facing the face through hole 47 more than half the axial length of the rotor and which consequently overlaps in the jOceBOM direction also the corresponding face through hole 47, i.e. also performs a function. the blades 49, 50, in the direction of rotation, along the arrows 21, 22 are located very short blades 51, 52, which (if we are talking about its axial length) are made similarly to a scraper. These blades are designed to prevent the formation of dead zones. . . The blades 44, 45, 49, 50, scrapers 48 and blades 51 and 52 are set at an angle relative to the tangent to the circumference, which also runs parallel to the direction of rotation along arrows 21 or 22. In this case, the short blade 50 or 52 extends from the end wall 25 inwards against the direction of rotation The other blades 44 and 45 run parallel to the direction of rotation, but with an offset of approximately 180 around the circumference of the rotor. . Scrapers 48 or short blades 51 or 52 run in the opposite direction, as can be seen from Figure 9. As follows from figure 5, blades 44, 49 and 45, 50, scrapers 48 as well as short blades 51 and 52 have a slope, exactly opposite to the inclination of the corresponding rotor 14 or 15, so that the envelopes in FIG. As a result, the gap S between the inner side wall and the ridges of the blades changes along the entire axial length of the rotors, namely from the minimum gap S to the maximum gap Sj ,. The average gap here also is. S. For this embodiment, the following ratios are valid: L / D 1.2510.10. 1 / L -, M 8/0 0.0275tO, 0075 a / L 0.15-0.35 3/5 1 / 3.5
    The cross section of the blades, scrapers and here is fundamentally the same, as in the first embodiment. In the third embodiment (Figs. 6, 7 and 10), shafts 14, 15 are installed on shafts 2, 13, respectively, having a cylindrical shape in axial pressure. The main feed mixing blades 55, 56 are mounted on caches and roots. The latter, located iO parallel to each other, have end pads 57 for limiting the through end cap holes 58, the length of which is up to the nearest end wall 25 or 26 previous options is equal to a.
    On each of the rotors 14, 15, respectively, an additional main feed mixing blade 59, 60 is installed, located parallel-g 20 lane relative to the blades 55, 56 respectively located on the screen of the rotors and offset relative to; last on the rotor field. Each of the additional blades 59, 60 from 25 on one side is made equal to the length of the corresponding rotors, and on the other has corresponding openings 61, 62 for entry the available blades of the other from rotors 30 i.e. for meshing mated blade pairs 55.62 and 56, 61 (Fig. 7). i The openings divided each of the additional blades 59, 60 into two parts.
    For the geometrical values of this variant, the relations of the two previous variants are valid.
    The blades are usually filled with hollow to effect cooling, which is fed through. 40 hollow shaft.,
    The mixer works as follows.
    The material to be mixed, for example a rubber mixture, is fed from above 45 through an inclined loading valve 10 into the mixing chamber 4. under pressure by means of a piston 8 driven by a hydraulic working piston 9. hl cylinder.
    Through the loading opening 11, additional powdered components can be added to the chamber 4, in particular various additives. „
    The rotors 14, 15 are rotated in the opposite direction, towards each other, as well as at different speeds to increase the cross-mixing effect. When the rotors rotate, the ridges of the blades of the neighboring rotors run around each other.
    In the first version,
    This is seen from the flow directions 63-56 shown in FIG. 8, &
    The flow of the processed material in front of each of the end orifice openings 41 is divided by the end pads 42 of each of the blades 27-30, so that part of the material g is directed, according to arrows 64 or 66, through the corresponding passage hole 41, while the other part of the processed material is Arrow 63 or 6b along the front side surface of 31 or 32 blades.
    At each rotation of the rotors 14, 15, the processed material in total moves twice from the center to the front sides in the axial direction, and at the same time double flow separation occurs again. Thus, extremely intensive mixing is carried out with a constant interlacing of the material and updating the boundary layer, which helps to eliminate temperature peaks arising in the material.
    In the second embodiment, in the region of the larger rotor, there is the zone of the greatest dippets, and in the region of the 1st meter, the zone of zero-pressure. In this case, in the zone of highest pressure, there is a maximum gap S., which contributes to a high rate of tangential leakage. The smallest gap S; in the zone of zero pressure, on the contrary, ensures scraping of the material from the walls of XCl, preventing it from sticking.
    The form of the rotor with a conic configuration contributes to a strong left flow, as follows from the arrows 67-70 shown in Fig.9.
    The countercurrent in accordance with arrow 68 relative to arrow 67 arises because both blades 44, 49 are offset relative to each other and change the feed direction. The blade 51 in this case prevents the formation of stagnant zones in the region of zero pressure,
    权利要求:
    Claims (8)
    [1]
    In the third embodiment, according to the flow direction arrows 71, 72 in FIG. 10, an intensive axial flow is also provided, and the material flow is separated at the end opening 58, and since the other rotor rotates in the opposite direction, the opposite axial flow occurs simultaneously . Due to the large gap at the wall, a high tangential leakage rate occurs, and as a result of the blades 55, 56 being rolled around the openings 62 and 61 of the corresponding blades 60 and 59, there is a strong deformation of compression of the material being processed in the radial direction by interlaying. Thus, the proposed design of the mixer by making a mixing blade of great length and with end pads for dividing the material flow creates conditions for the nocTo iHHoro material separation and its extreme interlayering, which ensures intensive axial movement of the material. Due to the fact that the angle of inclination is reduced and at the same time the width of the gap between the crest of the blade and the inner side wall of the chamber is increased, the resistance in the gap decreases, resulting in a strong leakage of material through the gap. As a result, the frequency of separation of tangential and axial flows increases while simultaneously radially mixing the material. All this leads to a uniform temperature distribution inside the material and an increase in the quality of the composition. In addition, due to the constant updating of the boundary layer, a good heat transfer takes place into the cooled body and rotors of the claims 1. Closed rotary mixer for polymeric materials containing two parallelly arranged along the mixing chamber and installed rotatable in opposite directions The rotors, each of which has at least one basic feeding mixing blade, is designed for the purpose of. Ensuring raviocerious heating of the material to be mixed, at least one of the main supply of the mixing blades is made with the end face arranged in parallel. Steps of the chamber face areas to limit the throughput end of the hole between the rotors from the side of the flow, while the angle of inclination of the blade to the longitudinal axis. the rotor is chosen to be at least 50 g; the length of the projection of the blade on the longitudinal axis of the rotor is chosen to be at least 0.5 the length of the internal cavity of the mixing chamber between its end walls, and the gap between the ridge of the blades and the inner side wall of the chamber is chosen to be at least 0.02 internal diameter of the mixing chamber.
    [2]
    2. The mixer according to claim 1, is distinguished by and with the fact that, each of the rotors has two main feed mixing blades, which are opposite to each other. .
    [3]
    3. The mixer according to claims 1 and 2, characterized in that it is equipped with scrapers installed behind each of the end-passage openings.
    [4]
    4. The mixer according to claim 1, about t l and the fact that the rotors are axially configured with a conical configuration, and the gap between the ridge of at least one blade and the inner side wall is selected variable along the length of the rotor.
    [5]
    5. A mixer according to claims 1-4, characterized in that the angle; the inclination of the blade to the longitudinal axis of the rotor is chosen to be equal.
    [6]
    6. A mixer according to claims 1-5, characterized in that the length of the projection of each of the blades is selected within 5-0.7 of the length of the internal cavity of the mixing chamber between its end walls.
    [7]
    7. The mixer according to claim 1, wherein the rotor is equipped with an additional feed mixing blade located parallel to the existing feed mixing blade I placed relative to the latter on the body of the rotor; equal to the length of the rotor, and has an opening for entry available; new feed mixing blade of another rotor.
    [8]
    8. The mixer according to claim 1, of which is the length of each of the through end holes is selected in the range of 0.15-0.35 length; the inner plane of the mixing chamber 1 between its end walls. Sources of information taken into account during the examination 1. German patent 646308, cl. 39 a 1/06, published. 1937 (prototype).
    If
     s gjTp-tJ
    fbi
    .in I "2nd
    IS ft / t.
    57 59
    And 4 /
    2S
    /
    .H
    BUT
    Pin.W
    No
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE2836940A|DE2836940C2|1978-08-24|1978-08-24|Internal mixer for kneading plastic masses, especially rubber|
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