JP2009022824A - Stirring blade - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a stirring blade which can express and maintain a uniform foamed state in a manufacture of a particle-containing foamed fluid, and makes a simple structure easy to maintain. <P>SOLUTION: The stirring blade is characterized in that a blade is fixed to a stirring shaft in an apparatus stirring uniformly a raw material thrown in a vertical and cylindrical vessel. The main shaft has a constitution that a scraper fixed on a plurality of support arms and/or a main shaft low end immediate part is provided as required together with the lattice-shaped blade fixed on a plurality of support arms extended axisymmetrically in a radial direction, and they are integrally operated. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a stirring blade suitable for uniform stirring in the production of a particle-containing foamed fluid.

2. Description of the Related Art Conventionally, an apparatus for attaching a dedicated attachment to a food processor for producing a small amount of foamed fluid such as whipped cream or soft cream is known (see, for example, Patent Document 1).

Usually, whippers, conical spirals or ribbon blades, scrapers, paddle blades are used as stirring tools for producing foams such as soft cream. In addition, there is also a paddle blade whose tip is protruded in a substantially rectangular shape, but the inside of the container is not stirred at a time, and the dimensions of the members forming the approximate blade are large (for example, see Patent Documents 2 to 8). ).
In addition, the shape is complicated or it is made of a casting, so that it takes a lot of man-hours to manufacture and is not suitable for mass production. In particular, when the blade area is large and the hole area ratio is small, the stirring material is simply pushed out. When particles are included, it is difficult to intervene and maintain sufficient bubbles. Further, the foam is often attached to the stirring blade, and in particular, in the case of a whipper, there is a drawback that a large amount of the foam is present inside the whipper.
On the other hand, a fluid self-hardening mixture process, invented by the Soviet Union as a casting mold manufacturing process, is abbreviated as FS method or batch method with a small amount of stirring. Uses a uniaxial horizontal paddle mixer provided with a feed blade and a return blade (see Non-Patent Document 1, for example).

JP 50-12451 (pp. 35-39, Fig. 11) JP 7-39264 A JP 2005-52060 A JP 2002-176920 A JP 2002-176923 A JP 1997-507126 A JP 2006-254663 A JP 2002-218966 A Gakumon Hiroshi, "FS Process", first edition, Nikkan Kogyo Shimbun, 1968, p. 9-10, 113-123

When the dimensions of the members constituting the wing are small, welding and machining are difficult, and it is difficult to efficiently integrate with the main shaft. Also, in casting, it is difficult to prepare a model for efficiently producing small-sized members, mold production, casting method, etc., and the mechanical properties of the cast material are inferior to those of wire products, and after casting It is difficult to machine the main spindle.
The present invention has been made in view of the above problems, and provides a stirring blade having a simple structure that can express and maintain a uniform foamed state and can be easily maintained in the production of a particle-containing foamed fluid. With the goal.

In order to achieve the above object, a stirring blade according to the present invention is characterized in that a blade is fixed to a stirring shaft in an apparatus for uniformly stirring a raw material charged in a vertical cylindrical container. Further, the stirring blade in the present invention can fix the lattice-like blades to a plurality of support arms that extend radially symmetrically from the axis.
Further, the stirring main shaft is characterized in that a scraper is fixed to a plurality of support arms and / or a bottom end of the main shaft as necessary together with blades extending in a radial direction or lattice-shaped blades fixed to a plurality of support arms. And

  According to the present invention, the lattice blades are not directly fixed to the main shaft of the agitating unit, but are indirectly fixed via the support arms extending in the radial direction of the main shaft. Has the advantage of being easy.

  Hereinafter, the best mode for carrying out the present invention will be described. The present invention is for a vertical cylindrical kneading apparatus for a particle-containing foamed fluid that can be separated and inserted / removed by a stirring unit, and is fixed to a blade or a plurality of support arms extending symmetrically in the radial direction. It is characterized in that a stirring main shaft having lattice-shaped blades and additionally having side and bottom scrapers is suspended.

In the present invention, the stirring shaft that hangs down can be directly connected to a servo motor or a geared motor with a speed reducer. However, in order to facilitate handling during installation or replacement, a shaft replacement type or an attachment / detachment type is desirable. Although it is possible to attach a grid blade directly to the stirring shaft, welding requires special skills and equipment when the wire diameter and thickness of the blade are small. It is desirable to extend the support rod. As a fixing method in this case, any method such as screwing or welding may be used.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 to FIG. 5 are diagrams showing the form of the stirring shaft of the present invention. FIG. 1 shows a basic configuration in which a grid-like wing 2 is attached to a main shaft 1. The main shaft diameter is approximately between 10mm and 50mm, and is selected considering the size of the entire stirring blade. In addition, the lattice-shaped blade in the present invention is not limited to any kind, but it is desirable to use a commercially available material such as a welded wire mesh, a crimped wire mesh, or an expanded metal, and among them, a porosity of 70% or more is preferable. Although the punching metal shows the same form, since it has a hole area ratio of 60% or less regardless of the shape of a commercially available product, there is an effect of extruding the once formed foam, which is not preferable. However, this is not the case when the hole area ratio is increased by cutting out a part of the shape.

In the present invention, a crimped wire mesh is a wire mesh that is not easily displaced or frayed by knitting vertical lines and horizontal lines alternately at right angles to a predetermined mesh using strands processed into a uniform waveform with gears. It is characterized by the ability to produce a large opening compared to the wire mesh. For example, when using a wire mesh, the wire diameter is 1.2 to 6 mm, preferably 1.6 to 3.2 mm by zinc drawing, 1.5 to 3 mm for stainless steel, and 6 to 100 mm, preferably 10 to 40 mm.
This is because if the wire diameter is too large, the raw material and the particle-containing foaming fluid are pushed in, which inhibits the generation of bubbles or crushes the bubbles once generated. If the opening is wide and the wire diameter is small, the rigidity is lost and the film is easily deformed. In the case of expanded metal, the plate thickness is preferably in the above range.

FIG. 2 shows a configuration example of an assembly type stirring blade. A support arm 3 is extended from the main shaft 1. The support arm is made of a rectangular, round, or commercially available material that is easy to process. Although it is based on screwing, a method such as welding or press-fitting may be used and is appropriately selected. In the figure, there are a plurality of examples extending perpendicularly to the longitudinal direction of the main shaft, but the mounting direction, the number of positions, and the like can be appropriately selected without being limited thereto. FIG. 3 shows the support arm 3 with lattice wings of the necessary dimensions attached. FIG. 4 shows an example in which the stirring blade is inserted into and dropped from the cylindrical container 4.
Since the foamed fluid produced by stirring with this stirring blade contains particles, it is desirable to always stir to prevent sedimentation and make the bubble distribution uniform. At least the height of deposition after insertion of raw materials is necessary, and in the process of maintaining stirring after foaming, a height equal to the liquid level is necessary. In order to reduce the stirring loss as much as possible, the side surface and the bottom surface must be close to the inner surface of the container so that there is no gap. The size varies depending on the size of the stirring blade, but is desirably 10 to 5 mm or less.

  In order to cause the foam stagnating in the gap to flow and move, a more uniform state can be maintained by attaching a scraper to the side surface or the bottom surface as shown in FIG. The side scraper 5 is preferably attached to an indicator rod 7 that is separately extended so as not to overlap with the support arm 3 that fixes the lattice-like wing 2 and, if possible, a rubber plate 8 is preferably attached so as to contact the inner wall of the container. The bottom scraper 6 is installed so as not to press the foam against the bottom but to lift up the foam. However, it can be omitted depending on the stirring conditions.

  Hereinafter, the present invention will be described based on examples. In a cylindrical container having an inner diameter of 500 mm and a height of 250 mm, a stainless steel crimped wire mesh with a mesh opening of 20 mm and a wire diameter of 1.5 mm is formed on a main shaft of 40 mm in diameter so that the total lattice blade width is 480 mm and the height is 260 mm. Nylon ties, Thomas & Bets tie wraps, Heraman Teton Insulok, etc., attached with 100 parts by weight of silica sand (flattery sand), polyvinyl alcohol (JP-05 made by Nippon Vinegar Poplar) 0.2 parts by weight, starch (Nisshi dextrin NSD-L) 0.8 parts by weight, citric acid (manufactured by Fuso Chemical) 0.2 parts by weight and water parts are charged, and the main stirring shaft is driven by an inverter-controlled geared motor. For example, by stirring No. 1 at 60 Hz, for example, at a rotation speed of 18 to 360, mainly 60 to 80 rpm, a good particle-containing foamed fluid could be expressed and maintained.

In a stirring vessel with an inner diameter of 125 mm and a height of 180 mm at both ends of a total length of 400 mm, a stirring blade with a mesh diameter of 10 mm, a main shaft diameter of 10 mm, a total lattice blade width of 110 to 120 mm, and a height of 125 to 160 mm. Were arranged at equal intervals, and the same material as in Example 1 was used and stirred at a geared motor rotational speed of 70 to 250 rpm, whereby a good particle-containing foamed fluid could be expressed and maintained.

300 mm long, 100 mm inner diameter, 200 mm high stirring vessel, 13 mm wide, 30 mm long, expanded metal with 67% space ratio, spindle diameter 10 mm, full lattice blade width 90-100 mm, height 190-200 mm Were mixed at equal intervals, and the same material as in Example 1 was used and stirred at a geared motor rotational speed of 70 to 250 rpm, whereby a good particle-containing foamed fluid could be expressed and maintained.

Under the same conditions as in Example 3, the same effect was obtained by using the wire mesh shown in the following table instead of the expanded metal.

As apparent from the above description, the present invention is configured such that, in the agitator, the agitating blade is divided from the agitating main shaft and divided into a main shaft having an extended support arm and a grid-like blade attached to the support arm. As a result, uniform agitation is achieved, and the structure is simple and the manufacture and maintenance can be performed easily.

  In the present invention, as long as it is possible to efficiently take in air and contain sufficient bubbles, the lattice-shaped wings do not necessarily need to be square, and may be rectangular or rhombus. Similarly, the cross-sectional shape of the members constituting the wing is not limited to a circle, and may be an ellipse or a rectangle.

Furthermore, in the present invention, the support arm extending in the radial direction does not need to be perpendicular to the main axis, and can be installed with an angle. As a result, the number of arms can be reduced, and in some cases, a secondary arm may be attached. More effective stirring can be performed by appropriately selecting the shape, capacity, and dimensions of the stirring container.

1 is a stirring blade showing a basic configuration in which a lattice blade 2 is attached to a main shaft 1. It is the schematic which shows the structural example of an assembly-type stirring blade. It is the schematic which shows the assembled stirring blade. 1 is a schematic cross-sectional view showing an embodiment of the present invention. It is the schematic of the stirring blade which shows the state which attached the scraper.

Explanation of symbols

1 Spindle
2 Lattice wings
3 Support arm
4 Cylindrical container
5 Side scraper
6 Bottom scraper

Claims (3)

  A stirring blade characterized in that a blade is fixed to a stirring shaft in an apparatus for uniformly stirring raw materials charged in a vertical cylindrical container.   2. The stirring blade according to claim 1, wherein a lattice-like blade is fixed to a plurality of support arms extending radially symmetrically from the stirring shaft. The stirring blade according to claim 1 or 2, wherein a scraper is fixed to the plurality of support arms and / or the bottom end of the main shaft.