JP6104024B2 - Kneading device and paddle for kneading device - Google Patents

Description

  The present invention relates to a kneading apparatus, and more particularly to a kneading apparatus that conveys an object to be kneaded while being kneaded by rotating a kneading member provided on two rotating shafts, and a kneading member used in such a kneading apparatus.

  Patent Document 1 discloses a kneading method in which a plurality of rod-type kneading members are rotated in an inequal speed by rotating two rotating shafts erected so that they are arranged in a reverse spiral shape, and the raw materials are kneaded in one direction. An apparatus is described.

  Patent Document 2 (particularly FIG. 4, FIG. 5 and the like) describes a kneading member in which wear resistance is enhanced by embedding a hard material on an end face or a transport surface.

JP 2006-239554 A JP 2009-061431 A

  When a flat member (paddle) is used as the kneading member, the area of the portion that is easily worn by contact with the material to be kneaded is larger than when a rod-shaped member (rod) is used, and the entire portion is cured. There was a problem that the paddle manufacturing cost would increase if the meat was built up.

  Accordingly, an object of the present invention is to provide a paddle for a kneading apparatus having a low cost and high wear resistance, and a kneading apparatus equipped with such a paddle.

Kneading apparatus paddle of the present invention, e Bei the grid-shaped convex portions disposed to protrude in the thickness direction in either or both the back and the conveying surface lattice shape, protruding in the width direction of the paddle to the side to solve the above problems And a built-up portion formed of a material harder than the base material of the paddle .

  According to the present invention, a paddle for a kneading apparatus having high wear resistance and a kneading apparatus equipped with such a paddle can be provided at low cost.

It is a top view of the kneading apparatus showing the paddle disposed on the rotating shaft in a state where most of the upper side of the housing is removed. It is sectional drawing along the AA line of FIG. (A) is a plan view of the paddle, (b) is a rear view of the paddle as viewed from the direction of the BB line of (a), and (c) is a front view of the paddle as viewed from the direction of the CC line of (a). (D) is the side view seen from the DD line of (a) of an attachment board, (e) is a fragmentary sectional view of a paddle. (A), (b), (c) is a figure which shows the cross-sectional shape of a grid | lattice-like convex part. (A), (b) is a figure which shows the example of arrangement | positioning of a grid | lattice-like convex part. (A) is a plan view of the paddle, (b) is a rear view seen from the direction of the EE line of the paddle (a), and (c) is a front view seen from the direction of the FF line of (a) of the paddle. It is.

  Hereinafter, the kneading apparatus and the paddle for a kneading apparatus of the present invention will be described in detail based on the embodiments shown in the drawings.

  1 and 2 illustrate the structure of a kneading apparatus according to an embodiment of the present invention. FIG. 1 shows paddles arranged on two rotating shafts with most of the upper side of the casing removed. FIG. 2 is a cross-sectional view taken along the line AA in FIG. 1. In FIG. 1, lattice-shaped convex portions and a mounting plate, which will be described later, are not shown.

  In FIG. 1 and FIG. 2, what is denoted by reference numeral 2 is a housing of the kneading apparatus 1 and is provided horizontally on the frame 14. The housing 2 is made of a metal such as steel, and is formed in an elongated rectangular parallelepiped shape here, and its lower part is circular as depicted by the tip of the paddle 20 of the rotating shafts 3 and 4 as shown in FIG. It has a corresponding arc.

  On the upper side of the right end portion of the housing 2, a charging port (not shown) for feeding the material to be kneaded into the housing 1 is provided. A discharge port (not shown) for discharging the material to be kneaded from the housing 1 is provided below the left end.

  In the housing 2, two rotating shafts 3 and 4 having the same diameter are installed in parallel with each other along the longitudinal direction thereof. The rotating shafts 3 and 4 are made of metal such as steel and have a circular cross section.

  The right end portion 3a and the left end portion 3b of the rotary shaft 3 have smaller diameters than the other portions of the rotary shaft 3, respectively, protrude from the housing 2 to the outside, and are rotatably supported by the bearing portions 5 and 6. Further, the right end portion 4a and the left end portion 4b of the rotating shaft 4 have smaller diameters than the other portions of the rotating shaft 4, respectively, protrude from the housing 2 to the outside, and are rotatably supported by the bearing portions 5 and 6. Yes.

  The right end portions 3a and 4a of the rotary shafts 3 and 4 are inserted into the gear box 7, and gears 8 and 9 that mesh with each other are fixed to the right end portions 3a and 4a of the rotary shafts 3 and 4 in the gear box 7. ing.

  A sprocket 10 is fixed to a portion of the rotating shaft 3 that protrudes outside the bearing portion 5. A motor 13 is mounted on the frame 14, and a sprocket 11 is fixed to the output shaft thereof. A chain 12 is stretched between the sprocket 10 and the sprocket 11.

  A rotational driving force in one direction of the motor 13 is transmitted to the rotating shaft 3 through the sprocket 11, the chain 12 and the sprocket 10, and the rotating shaft 3 rotates in one direction. Further, the rotating driving force is transmitted through the gears 7 and 8. The rotation shaft 4 is transmitted to the rotation shaft 4, and the rotation shaft 4 rotates in the direction opposite to the rotation shaft 3. The rotating shafts 3 and 4 are rotated at an inconstant speed through the gears 8 and 9 at a rotation speed ratio of N: N−1, where N is an integer equal to or greater than 2. For example, N is set to 2 to 6, and in this embodiment, N is set to 5 and the rotary shafts 3 and 4 are rotated at a rotation ratio of 5: 4. In addition, the rotation direction of the rotating shafts 3 and 4 is a direction rotated toward the inner side as viewed from above as shown in FIG.

  Paddles 20 as kneading members are respectively provided on the outer circumferences of the rotating shafts 3 and 4 along two spirals. The rotating direction of the spiral is reversed between the rotating shaft 3 and the rotating shaft 4. The paddles 20 are arranged at a constant interval L in the axial direction of the rotary shafts 3 and 4. Further, the paddles 20 are arranged at intervals of 90 degrees in the circumferential direction of the rotating shaft 3 and at intervals of 72 degrees in the circumferential direction of the rotating shaft 4. That is, the ratio of the circumferential arrangement interval between the rotary shaft 3 and the rotary shaft 4 is 5: 4 which is the same as the rotation speed ratio, and the spiral in which the paddle 20 is arranged rotates 360 degrees. The required axial length (spiral pitch) is the inverse ratio 4: 5. The attachment angle of the paddle 20 with respect to the center line of the rotary shafts 3 and 4 is 45 degrees.

  When the rotary shafts 3 and 4 are rotated, the material to be kneaded is conveyed from the right side to the left side in FIG. Hereinafter, the surface of the paddle 20 for extruding the material to be kneaded (the surface shown in FIG. 2) is referred to as a conveying surface, and the surface facing this is referred to as the back surface.

  The paddles 20 have the same shape and the same material, and are made of metal such as steel. 3 (a) is a plan view of the paddle 20, FIG. 3 (b) is a view showing the shape of the back surface as viewed from the direction of line BB in FIG. 3 (a), and FIG. 3 (c) is FIG. 3 (a). It is a figure which shows the shape of the conveyance surface seen from the CC line direction. 4D is a view of the mounting plate 30 as viewed from the direction of the line DD in FIG. 3A, and FIG. 4E is a partial cross-sectional view of the paddle 20. FIG.

  The overall shape of the paddle 20 is a hexagonal shape with a lower surface 24 narrower than the upper surface 23 and is a thin plate having a thickness t. The upper surface 23 is a circular arc that protrudes outward when attached to the rotary shafts 3 and 4. The lower surface 24 is fixed to the upper surface of the mounting plate 30 by, for example, welding.

  The mounting plate 30 is a rectangular plate-like member whose bottom surface 32 has an arc shape, and is connected to the rotary shafts 3 and 4 via two bolt holes 31 and the long side thereof is the center line of the rotary shafts 3 and 4. Bolted in parallel direction.

  The entire upper surface 23 of the paddle 20 has a built-up portion 26a protruding at a constant thickness in the height H direction, and most of the upper surface 23 except the lower portions of the two side surfaces 25 protrudes at a constant thickness in the direction of the width B. A raised portion 26b is applied. The material of the built-up portions 26a and 26b is a material harder than the base material of the paddle 20 and having excellent wear resistance, for example, a welding material containing a large amount of tungsten carbide. By providing the build-up portions 26a and 26b, the wear resistance of the upper surface 23 and the side surface 25 that are easily worn can be increased.

  Most of the paddle 20 except for the vicinity of the lower end of the conveying surface 21 is provided with a lattice-like convex portion 27. As shown in FIG. 4A, the grid-like convex portion 27 is a rod-like member having a semicircular cross-sectional shape and protruding from the conveying surface 21 in the thickness direction of the paddle 20, and the angle α with respect to the bottom surface 24 is 45 degrees. Thus, they are arranged in a lattice pattern with a spacing of p. Although the material of the grid-like convex part 27 can promote the adhesion of the material to be kneaded to the paddle 20 even if it is not a hard material, it is a material harder than the base material as with the built-up parts 26a and 26b. It is desirable to improve the wear resistance of the grid-like convex portion 27 itself.

  By providing such a grid-like convex portion 27, the material to be kneaded is attached to the quadrangular recess 28 surrounded by the grid-like convex portion 27, and the conveying surface 21 is protected by this adhered material to be kneaded. The wear resistance of the conveying surface 21 can be improved.

  If the interval p between the lattice-shaped convex portions 27 is reduced, the object to be kneaded adheres firmly to the paddle 20, peels off from the surface of the paddle 20, or once the object to be kneaded adheres to the paddle as the paddle 20 moves. It is possible to prevent the wear of the paddle 20 from moving by sliding on the surface of the pad 20. Therefore, in the case of a material to be kneaded with low adhesion, for example, a material to be kneaded with little moisture, a material to be kneaded with coarse particles, a material to be kneaded with low hydraulic property, the interval p is reduced and the material to be kneaded with high adhesion. In this case, the interval p should be increased.

  By setting the angle α to 45 degrees and the interval p to be constant, the concave portion 28 becomes a square, and one diagonal line thereof is parallel to the height direction of the paddle 20 (diameter direction of the rotating shafts 3 and 4). Are arranged in the height direction of the paddle 20, and the other diagonal line is parallel to the width direction of the paddle 20 (advancing direction of the material to be kneaded), and the two corner parts 29c on the diagonal line. 29d are arranged in the width direction of the paddle 20. Therefore, when the material to be kneaded moves in the height direction and the width direction of the paddle 20 with the rotation of the rotary shafts 3 and 4, the adhered material to be kneaded becomes difficult to peel from the paddle 20.

  3 (c) and 4 (a) are examples of the aspect of the grid-like convex portion 27, and the cross-sectional shape, arrangement shape, and arrangement range are the properties of the material to be kneaded and the rotation axis of the paddle 20. Adjust according to the mounting angle etc. for 3 and 4.

  The cross-sectional shape of the lattice-shaped convex portion 27 may be a semicircular shape, a triangular shape shown in FIG. 4B, a quadrangular shape shown in FIG.

  FIG. 5A shows an example of the arrangement shape of the grid-like convex portions 27, in which the angle α is smaller than 45 degrees and the concave portion 28 is formed in a rhombus shape. FIG. 5B shows another example of the arrangement shape of the grid-like convex portions 27, and the concave portion 28 has a square shape parallel to the bottom surface 24. 5A, the diagonal line of the recess 28 is parallel to the height direction and the width direction of the paddle 20, and the material to be kneaded attached to the paddle 20 is the same as in the case of FIG. 3C. The effect which becomes difficult to peel is acquired. In addition, the angle α with respect to the bottom surface 24 is set to different values on the left and right sides so that the diagonal line of the concave portion 28 does not become parallel to the width direction and the height direction of the paddle 20, or the interval p is changed depending on the location. The thickness may not be constant.

  The range in which the lattice-shaped convex portions 27 are arranged is not limited to that shown in FIGS. 3B and 3C. For example, it may be disposed on the back surface 22 or only on a portion that is easily worn rather than the entire transport surface 21. Further, in order to adjust the conveyance speed of the material to be kneaded, a part of the paddle 20 may be rotated 180 degrees with respect to the rotation angle 3 or 4 with respect to that shown in FIG. In this case, the grid-like convex portions 27 are arranged on the surface (the surface not shown in FIG. 2) for pushing back the material to be kneaded in the paddle 20 in the direction of the inlet (right direction in FIG. 1).

  If the paddle has a plate shape, the present invention can be applied regardless of its outer shape. FIG. 6 shows an example in which a grid-like convex portion 47 is provided on a paddle 40 having a different shape from that shown in FIG. 6A is a plan view of the paddle 40, FIG. 6B is a diagram showing the shape of the back surface as viewed from the direction of line EE in FIG. 3A, and FIG. 6C is FIG. 6A. It is a figure which shows the shape of the conveyance surface seen from the FF line direction.

  The paddle 40 also has a hexagonal shape similar to that of the paddle 20, but the upper surface and the lower surface have substantially the same width and are nearly rectangular. As in the case of the paddle 20, a built-up portion 46 is provided on the entire upper surface and most of the side surface, a grid-like convex portion 47 is provided on the conveying surface, and a square concave portion 48 inclined by 45 degrees with respect to the bottom surface is formed. Yes.

  In the paddle 20, the lattice-shaped convex portion 27 is provided on a portion that is easily worn out on the surface, specifically, a large portion of the conveying surface 21, and the material to be kneaded adheres to the concave portion 28. Therefore, the wear resistance of the paddle 20 can be increased at a lower cost compared to the case where the entire portion that is easily worn is hardened. In addition, since the paddle is a consumable part that needs to be replaced relatively frequently in the kneading apparatus, the kneading apparatus 1 including such a paddle 20 can keep running costs low.

DESCRIPTION OF SYMBOLS 1 Kneading apparatus 2 Case 3, 4 Rotating shaft 3a, 4a Right end part 3b, 4b Left end part 5, 6 Bearing part 7 Gear box 8, 9 Gear 10, 11 Sprocket 12 Chain 13 Motor 14 Frame 20 Paddle 21 Conveying surface 22 Back surface 23 Upper surface 24 Bottom surface 25 Side surface 26a, 26b Overlaid portion 27 Lattice-shaped convex portion 28 Recessed portion 29a, 29b, 29c, 29d Corner portion 30 Mounting plate 31 Bolt hole 32 Bottom surface 40 Paddle 46 Outer circumferential surface

Claims (6)

In a paddle for a kneading apparatus that is attached to a rotating shaft of a kneading apparatus and kneads a material to be kneaded,
E Bei the grid-shaped convex portions disposed to protrude in the thickness direction in either or both the back and the conveying surface grid pattern,
A paddle for a kneading apparatus, comprising a built-up portion that protrudes in the width direction of the paddle on a side surface and is formed of a material harder than the base material of the paddle.   The shape of the concave portion surrounded by the lattice-shaped convex portion is a rhombus, and one of the diagonal lines of the rhombus is parallel to the width direction of the paddle, and the other of the diagonal lines is parallel to the height direction of the paddle. The paddle for a kneading apparatus according to 1.   The paddle for a kneading apparatus according to claim 2, wherein the shape of the recess is a square.   The paddle for a kneading apparatus according to any one of claims 1 to 3, wherein the grid-like convex portions are formed of a material harder than the base material of the paddle.   The kneading apparatus according to any one of claims 1 to 4, further comprising a built-up portion that protrudes in a height direction of the paddle on an upper surface and is formed of a material harder than the base material of the paddle. Paddle. A kneading apparatus provided with the paddle for a kneading apparatus according to any one of claims 1 to 5 .

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