JPH04243533A - Structure of mixer blade - Google Patents

Abstract

PURPOSE:To provide a mixer blade easy to manufacture and adaptable for a high-speed rotation by enclosing the core member of the mixer blade fixedly with a wear-resisting resin. CONSTITUTION:In the manufacture of a wear resisting resin 11 for enclosing a core member 10 is used a wear resisting material such as urethane rubber, natural rubber, polybutadiene, isobutylene-isoprene rubber, butadiene rubber, fluororubber, nitrile rubber, chlorobutylene rubber, hypalon, etc. This mixer blade is of a structure formed by enclosing the outer peripheral surface of a flat core member 10 with poured molten wear resisting resin 11 integrally therewith. To accomplish this, the core member 10 is provided with a plurality of through holes 12, the resin 11 is poured into the core member 10 and a one- piece resin 11 is formed by such through holes 12. The core member 10 may be made of a net or provided with irregular outer surface to afford a fixing mechanism for the poured resin 11. The core member 10 may also be formed into the shape of a fork or ring at its end to prevent its detachment.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention is applicable to mixer blades used for kneading refractory materials, such as mixing blades, scrapers, scraping plates, mixing star stirring impellers, agitators, movable blades, etc. It relates to the structure of blades for mixing, kneading, and stirring compounds.

0002

[Prior Art] Conventional mixer blades are made of hard metal or ceramic material in consideration of wear resistance against the materials to be kneaded, and materials are also used to increase the strength of the blade base material itself. In order to improve the wear resistance of the blade surface, hard material build-up, coating, and other surface treatments are applied.

0003

[Problems to be Solved by the Invention] However, the mixer blades that rotate at high speed in the material to be kneaded have insufficient strength and wear resistance, resulting in poor durability.

[0004] In particular, when ceramic is used as a blade material, it is more durable than metal material, but it is difficult to manufacture, and when the rotation speed is rapidly increased for rapid kneading, Cracks and cracks may occur, and pieces of the broken mixer blades can be mixed into the mixture.

The problem to be solved by the present invention is to solve the problems of the rotary blades of conventional mixers, and to provide a mixer blade that is easy to manufacture and can be satisfactorily applied to high-speed rotation.

[0006]

[Means for Solving the Problems] The present invention has solved the problems by providing a structure in which the core member of the mixer blade is surrounded by a wear-resistant resin and fixed to the core member.

[0007] As the structure for preventing the wear-resistant resin of the core member of the present invention from coming off, any method can be adopted, such as pasting with a strong adhesive, tightening with screws, clamps, or the like.

Furthermore, the core member and the wear-resistant resin are fixed by inserting the core member into a mold into which the wear-resistant resin is cast.
It is preferable to pour and mold a wear-resistant resin. When integrating with the core material by pouring the resin, the core material may be a bar, net, plate, lattice, etc., with multiple through holes in the metal such as an iron plate, or a convex or concave shape on the surface. A wear-resistant resin is cast and adhered to the surface of the core member. In addition, as a structure to prevent the surrounding wear-resistant resin from separating, it is possible to cast the wear-resistant resin on a ring-shaped iron plate and attach it to it, and create a structure in which the wear-resistant resin is itself an integral part and penetrates the core member. Demonstrate even more effectiveness.

[0009] The material of the core member may be any structural material such as metals including iron, steel, aluminum and other alloys, or ceramics.

The abrasion-resistant resin surrounding the core member is made of urethane rubber, natural rubber, polybutadiene, butyl rubber, butadiene rubber, fluorine rubber, nitrile rubber, chlorobutylene rubber, Hypalon, etc., which is resistant to wear and is #70 according to JIS A standard. A material having a hardness of about 100 to 100 is preferable.

[0011]

[Function] In order to improve the durability of the mixer blade itself, the strength of the core material itself, the wear resistance of the blade part, and the bonding state between the core material and the blade are most important. The wear-resistant resin described above can also sufficiently improve its durability.

Furthermore, since the blade member is made of resin, it is easy to manufacture, and it is also possible to easily obtain a structure in which the blade member is integrated with the core material.

[0013] When the rotation speed of the blade exceeds 500 rpm,
The wear of the blades becomes severe, and the wear-resistant resin surrounding the core member may come off due to centrifugal force due to rotation, but by being integrated with the core member, the resin can be prevented from coming off.

In particular, when the kneaded product is applied to a carbon-containing refractory material, the flexibility of the resin corresponds to the low specific gravity of the carbon contained, and its life is improved.

[0015]

[Embodiment] First Embodiment Fig. 1 shows a vertical cross-sectional structure of a mixer to which the blade of the present invention is applied.

In the figure, 1 is a mixer main body, 2 is an upper cylindrical cover, 3 is a lower cylindrical cover, 4 is a pan, 5 is a mixing star, and 7 is a pressure roller. Here, the blade 9 of the present invention is attached to the tip of the mixing star 5.

FIG. 2 shows an example of the structure of the blade 9. Both of the figures are composed of a core member 10 and a wear-resistant resin 11, and (a) of the figure shows a structure in which the wear-resistant resin 11 is poured into the outer peripheral surface of the flat core member 10 and integrated. show. Same (b)
A plurality of through holes 12 are provided in the core member 10, and the concentric member 10
An example is shown in which the resin 11 is poured into the through hole 12 to form an integrated resin 11. (c) is the core member 10
An example is shown in which the resin 11 is formed from a net-like body and used as a fixing mechanism for the poured resin 11. Furthermore, (d) shows an example in which the outer surface of the core member 10 is made uneven as a fixing mechanism, and (e
) shows an example in which the tip of the core member 10 is made into a fork shape, and (f) shows an example in which the core member 10 is made into an annular shape to prevent detachment.

Second Embodiment FIG. 3 shows a high-speed mixer 20 in which the blades of the present invention are applied to an agitator 21 whose rotation speed exceeds 1000 rpm. Further, with reference to FIG. 4 showing a planar cross section thereof, the stirring impeller 21, the mixing blade 22, the stirring impeller 21
The blades 2 of the stirring impeller 21 of the high-speed mixer 20 have a rotating pan 23 that rotates in the opposite direction of the rotary pan 23 and a scraping plate 24.
The present invention was applied to No. 5.

FIG. 5 shows how the blades 25 are attached to the stirring impeller 21 and how they operate, and the raw material B charged from the bottom plate 26 to the upper limit L of the raw material is stirred at high speed.

FIG. 6 shows a bird's-eye view of the blade, and FIG. 7 shows the blade viewed from the mounting portion side. The same blade 25 is the core member 2
A plurality of through holes 28 are formed in the hole 7, and a resin 29 is poured into the outer circumferential surface of the through hole 28. In this case, the blade surface is formed with an inclination angle θ of 3 to 15 degrees with respect to the mounting portion 30, thereby forming a wide working surface.

SS41 was used as the core member 27, and the rotation speed of the stirring impeller 21 was set at 1000 to 1200 rpm, to which the blades 25 obtained by forming the resin 29 from urethane resin with a hardness of #90 to a thickness of 20 mm were set at 1000 to 1200 rpm. Alumina, S
When 1000 kg of iC quality and C quality raw materials were kneaded, the lifespan was 200 times. On the other hand, when using a similar core member with a high chrome overlay, the lifespan is 30 times, and when using a tungsten carbide overlay, the lifespan is 50 times. It wasn't too much.

[0022] Furthermore, if ceramic mixer blades are used, depending on the raw material, they can achieve 300 channels or more, but if the raw materials are hard or the blades are not installed properly, cracks may occur, and due to manufacturing reasons, the The more days it takes,
Ceramics are inferior to the mixer blades of the present invention because they are difficult to manufacture.

The present invention can be applied to a mixing blade, a scraping plate, a scraper, etc. other than an agitator that rotates at high speed.

Third Embodiment FIG. 8 shows an example in which the third embodiment is applied to a stirring plate 32 of a mixer 31.

The stirring device 33 of the mixer 31 is arranged so that the mixture rotated by the pan 34 is just below the pressure roller 35, and when discharging the mixture, the mixture is placed in a discharge damper 36 which is opened at the center of the pan 34. The angle of the stirring plate 32 is changed by a drive device (not shown) so that the stirring plate 32 faces above the mixer. Here, as shown in FIG. 9, urethane rubber 39 as a wear-resistant resin is joined to the stirring plate 32 at the tip of the stirring device 33 by a seat plate 37 and screw members 38 such as bolts and nuts.

[0026]

Effects of the Invention: The mixer blade of the present invention is easy to manufacture, has sufficient wear resistance and strength, and can extend its life. Therefore, maintenance work such as replacing the blades of the mixer itself is reduced, and the mixer can be operated easily. Increased efficiency.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal section showing the structure of a mixer to which the blade of the present invention is applied.

FIG. 2 shows an example of a blade structure in the mixer shown in FIG. 1.

FIG. 3 shows an example in which the blade of the present invention is applied to a high-speed mixer.

FIG. 4 shows a plan cross section of the high speed mixer of FIG. 3;

FIG. 5 shows the structure of a stirring impeller applied to the high-speed mixer of FIG. 3.

6 shows the structure of the blades attached to the stirring impeller of FIG. 5. FIG.

FIG. 7 is a view of the blade shown in FIG. 6 as viewed from the mounting portion side.

FIG. 8 shows an example in which the blade of the present invention is applied to a stirring plate of a mixer.

FIG. 9 shows the structure of the stirring plate used in FIG. 8.

[Explanation of symbols]

1　Mixer body 2 Upper tubular cover 3 Lower tubular cover 4 Bread 5 Mixed star 7 Pressure roller 9 Feather 10 Core member 11 Wear-resistant resin 12 Through hole 20 High speed mixer 21 Stirring impeller 22 Mixed plate 23 Rotating pan 24 Scraping board 25 Feather 26 Bottom plate 27 Core member 28 Through hole 29 Resin 30 Mounting part 31 Mixer 32 Stirring board 33 Stirring device 34 Bread 35 Pressure roller 36 Discharge damper 37 Seat board 38 Screw member 39 Urethane rubber

Claims (1)

[Claims] 1. A structure of a mixer blade in which a core member is surrounded by a wear-resistant resin, and the wear-resistant resin is fixed to a concentric member.