JP2566234B2 - Equipment for manufacturing mixing elements - Google Patents

Description

The present invention relates to an apparatus for manufacturing a mixing element used in a static mixer that mixes two or more kinds of fluids.

The static mixer has no mechanically movable parts, has spiral blades arranged in the passage pipe, and the fluid is mixed by flowing the fluid through the passage pipe. 1 and 2 are perspective views of a 90 ° rotating type mixing element, and FIG. 3 is a side view of a static mixer using this mixing element. The mixing elements 1 and 8 respectively have cylindrical passage tubes 2 and 9 and spiral blades 3, 4 and 10, 11 provided in the passage tubes 2 and 9, respectively. The blades 3, 4 and 10, 11 are twisted by 90 ° clockwise (counterclockwise) and counterclockwise (counterclockwise), respectively.
Fluid passages 5 and 6 and fluid passages 12 and 13 are formed by 4 and 10 and 11, respectively.

The fluid passages 5 and 6 and the fluid passages 12 and 13 have openings 7 and 14, respectively.
Through the entire length of the passage tubes 2 and 9.

When such mixing elements 1 and 8 are alternately inserted into the cylindrical casing 15, and the blades 3, 4 and 10, 11 of the mixing elements 1 and 8 are arranged so as to be orthogonal to each other, the stationary state is achieved. The mold mixer 30 is assembled. 4 and 5 show 180 ° rotation type mixing element 1
FIG. 24 is a perspective view showing 6 and 23. The inner portions of the passage pipes 17 and 24 are provided with fluid passages 20 and 21 respectively by blades 18 and 19 that rotate spirally 180 ° to the right and blades 25 and 26 that also rotate 180 ° counterclockwise, respectively.
And fluid passages 27, 28 are formed. This fluid passage 20,
21 and 27, 28 through the openings 22 and 29, passage tubes 17 and 2
4 communicate with each other over the entire length. Then, as shown in FIG. 6, the mixing element 16 is provided in the casing 15.
And 23 are alternately inserted, and the blades 1 are connected to each other.
The static mixer 31 is assembled by arranging the edges of 8, 19 and 25, 26 orthogonally.

While the two types of fluids FA and FB flow through the fluid passages of the static mixers 30 and 31 configured as described above, a part of the fluid spirally rotates 90 ° or 180 °, and a part of the fluid opens. After being sheared at one part, it joins the fluid flowing through the other fluid passage and is further divided, and then it is spirally rotated by 90 ° or 180 ° in the opposite direction. The fluids are mixed while repeating such rotation, shearing, merging, and dividing.

If the above-mentioned mixing element is manufactured by casting using a core, the manufacturing process of the mixing element is complicated, and the manufacturing cost thereof is extremely high. Also, in the case of casting using a core,
It is difficult to manufacture the mixing element 1 etc. by integrally molding the passage tube 2 etc. and the blades 3, 4 etc.
For 180 ° rotating mixing element, passage tube 1
It is extremely difficult to integrally mold the 7th blade and the blades 18, 19th blade.

The present invention has been made in view of such circumstances,
Provided is a mixing element manufacturing apparatus capable of manufacturing a mixing element having a spiral blade having an opening and a fluid passage integrally formed, and having an excellent mixing effect without abnormal retention. The purpose is to

The manufacturing device of the mixing element according to the present invention,
A tubular passage pipe through which a fluid flows, a spiral blade integrally formed with the passage pipe inside the passage pipe to form a plurality of fluid passages inside the passage pipe; In a manufacturing device for a mixing element having an opening in a longitudinal direction, a shape that occupies a part of the fluid passage that includes a first plate-shaped portion and a portion that projects downward from the first plate-shaped portion and that includes a part of the opening. An upper mold member having a first projecting portion formed in the above, a plate-shaped middle mold member having a hole having the same shape as the side surface of the passage pipe, a second plate-shaped portion and a second plate-shaped member.
A lower die member having a second projecting portion that is formed in a shape that projects upward from the plate-shaped portion and occupies the remaining portion of the fluid passage including the remaining portion of the opening portion, the first projecting portion and the first projecting portion Two
Formed by the hole, the first projecting portion and the second projecting portion by inserting the projecting portion into the hole and superposing the first plate-shaped portion, the medium-sized member and the second plate-shaped portion. It is characterized in that a molten material or a liquid material is injected into the space.

An embodiment of the present invention will be specifically described below with reference to the accompanying drawings. FIG. 7 is a perspective view of a manufacturing apparatus for the 90 ° counterclockwise rotation type mixing element 8, FIG. 8 is an enlarged perspective view of the mixing element 8 (see FIG. 2), and FIG. 9 is a bottom view of the mixing element 8. . This manufacturing apparatus has three divided molds made of aluminum or cast iron material, that is, an upper mold 32, a middle mold 33 and a lower mold 34.
The upper die 32 has a metal plate 35 and projecting portions 37 and 38 that project downward. The lower surface of the mold 35 is provided with a recess 36 that is hollowed out in the shape of a thin disk. The pair of protrusions 37 and 38 provided in the recess 36 are formed so as to occupy half of the fluid passages 12 and 13, respectively. The middle die 33 has a circular hole 39 having a diameter substantially the same as the outer peripheral diameter of the mixing element 8 and formed in the thickness direction, and a runner opening on the peripheral surface of the circular hole 39.
With 39a. The lower mold 34 has a mold 40 and projecting portions 42 and 43 projecting above it. A thin disk-shaped protrusion 41 is provided on the upper surface of the mold 40. The projecting portion 42 provided on the projecting portion 41 has a flat side surface 42 a at the flat side surface 3 a of the projecting portion 37.
It is shaped so as to occupy the fluid passage 13 and the opening 14 together with the projecting portion 37 when superposed on the 7a. Similarly, the protruding portion 43 is formed in a shape that occupies the fluid passage 12 and the opening 14 together with the protruding portion 38 when the planar side surface 43a is overlapped with the planar side surface 38a of the protruding portion 38. Recess 36 and protrusion 41
The diameters of the peripheral side surfaces are substantially the same and are slightly smaller than the diameter of the circular hole 39.

The mold 32, the middle mold 33, and the lower mold 34 as described above have the protrusion 3
7, 38 and the protrusions 42, 43 on the plane side surfaces 37a, 38a of the protrusions 37, 38.
The flat side surfaces 42a, 43a of the protrusions 42, 43 are fitted into the circular holes 39 so that they come into contact with each other, and then assembled. Then, the blades 10 and 11 having the opening 14 are formed between the spiral side surfaces of the protrusions 37 and 43 and between the spiral side surfaces of the protrusions 38 and 42. Further, the passage pipe 9 portion is formed between the circumferential side surfaces of the projecting portions 37, 38, 42, 43 and the circumferential surface of the circular hole 39. Further, between the circumferential side surface of the recess 36 and the circumferential side surfaces of the projecting portions 37, 38, 42, 43, an inner annular projection 9a portion is formed on one end surface in the longitudinal direction of the passage tube 9. Furthermore, between the circumferential side surface of the projection 41 and the circumferential side surface of the circular hole 39, an outer annular projection 9b portion on the other end surface in the longitudinal direction of the passage tube 9 is formed. Mold assembled as described above (upper mold
When a molten material or a liquid material is injected into the cavities of 32, the middle mold 33 and the lower mold 34) via the runner 39a, this material is molded into the shape shown in FIGS. 8 and 9 and solidifies. .

Next, a process of manufacturing the mixing element 8 by the lost wax casting method using the split mold as described above will be described. First, the split mold shown in FIG. 7 is assembled as described above. Molten wax is injected into the cavity in the mold via the runner 39a. Then, the injected wax is solidified to form a raw model having the shape shown in FIG. The raw models are taken out of the mold and a plurality of them are connected so as to be suitable for casting. The thus-fabricated raw model is dipped in a refractory emulsion, and sand is sprinkled on the raw model adhered with the refractory emulsion to cover the raw model with a sand layer. The bath of refractory is formed on the surface of the raw model by repeating such immersion in the refractory emulsion and coating with the sand layer. Then
The entire wax model is heated to elute the wax. When the remaining sand mold is fired at a high temperature, a mold having a space having a shape corresponding to the shape of the mixing element 8 is cast.
In this mold, aluminum, stainless steel, nickel,
A melt of the constituent material of the mixing element such as iron or copper is injected. When the sand mold is broken after the injection material has solidified, the 90 ° counterclockwise mixing element 8 having the shape shown in FIG. 8 is taken out. When the constituent material of the mixing element is plastic or ceramic, instead of the lost wax method, a molten plastic material, a slurry-like ceramic material, or a two-liquid curable liquid material is used in place of the wax in the decomposition mold shown in FIG. The mixing element may be manufactured by direct injection.

When manufacturing the 180 ° counterclockwise rotation type mixing element 23 (see FIG. 5), first, a raw model for the 90 ° counterclockwise rotation type mixing element 8 is molded as described above.
Then, two 90 ° rotation type raw models are connected in the longitudinal direction and adhered to each other to obtain a row model for the 180 ° rotation type mixing element 23 having a shape as shown in FIG. A sand mold is cast from this raw model as described above, and a molten material of a mixing element such as aluminum is poured into the casting mold to make a 180 ° rotary mold having the shape shown in FIG. 4 or 5. The mixing element is manufactured.

The 90 ° clockwise rotation type mixing element 1 whose enlarged perspective view is shown in FIG. 10 can be similarly manufactured by the lost wax casting method using a split mold. The 180 ° clockwise rotation type mixing element 16 is also made by connecting two 90 ° clockwise rotation type mixing element row models in the longitudinal direction to make a row model, and using this row model, a sand mold is prepared. It may be manufactured and a melt of the material for forming the mixing element may be injected into the sand mold. Further, as shown in the perspective view of FIG. 11, the mixing element 44 having the three fluid passages 45, 46, 47 can be easily manufactured by the split mold.

As described in detail above, according to the present invention, the step of melting the core can be omitted as compared with the case of manufacturing the mixing element using the conventional core, so that the number of steps is small and the manufacturing is easy. Is. Therefore, the manufacturing cost is low, and it can be reduced to 1/5 to 1/10 of the conventional one. Further, as shown in FIG. 8, by forming the corners 10a, 11a of the fluid passage near the boundary between the blades 10, 11 and the passage pipe 9 with a rounded shape, the retention of the fluid can be reduced. According to the present invention, the roundness of the corners 10a and 11a can be easily formed. Further, the edges 10b and 11b of the blades 10 and 11 are formed to be curved in the thickness direction thereof and have a roundness, so that the flow resistance of the fluid can be reduced,
According to the present invention, the roundness of the blade edge can be easily formed. Furthermore, when a conventional core is used, it is not easy to manufacture a 180 ° rotating type mixing element, but when it is manufactured by the lost wax casting method using a split mold, it is 90 ° as described above. The 180 ° rotary mixing element can be easily manufactured simply by connecting the rotary raw models in the longitudinal direction. Furthermore, also in the case of manufacturing a mixing element having three fluid passages as shown in FIG. 11, according to the present invention, the mixing element in which the blade and the passage pipe are integrally formed can be easily manufactured. .

[Brief description of drawings]

1 and 2 are perspective views of a 90 ° rotary mixing element, FIG. 3 is a side view of a static mixer, and FIGS. 4 and 5 are perspective views of a 180 ° rotary mixing element. FIG. 7 is a side view of the static mixer, FIG. 7 is a perspective view of the device of the present invention, FIG. 8 is an enlarged perspective view of a 90 ° counterclockwise rotation type mixing element, FIG. 9 is its bottom view, and FIG. 10 is 90. ° Right rotation mixing element enlarged perspective view, FIG. 11 is a perspective view of a mixing element having three fluid passages. 1,8,16,23,44 …… Mixing element, 2,9,17,24…
… Passage pipes, 3,4,10,11,18,19,25,26 …… Vanes, 5,6,12,1
3,20,21,27,28 …… Fluid passage, 7,14,22,29,48 …… Opening, 32,33,34 …… Mold, 35,40 …… Mold, 36 …… Concave Place, 3
7,38,42,43 …… Projection, 39 …… Circular hole, 41 …… Projection.

Claims (5)

(57) [Claims] 1. A tubular passage pipe through which a liquid flows, and a spiral blade integrally formed with the passage pipe inside the passage pipe to form a plurality of fluid passages inside the passage pipe. And a device for manufacturing a mixing element having an opening in the longitudinal direction of the blade, wherein one of the fluid passages includes a first plate-like portion and a portion of the opening protruding downward from the first plate-like portion. An upper die member having a first projecting portion formed in a shape occupying a portion, a plate-shaped middle die member having a hole having the same shape as the side surface of the passage pipe, and a second plate-shaped portion And a lower mold member having a second projecting portion that projects upward from the second plate-shaped portion and is shaped to occupy the remainder of the fluid passage including the remainder of the opening, A protrusion and a second protrusion are inserted into the hole, and the first plate-shaped portion, the medium-sized member, and Superimposing two plate-shaped portion, the hole, the manufacturing apparatus of the mixing element, characterized by injecting a molten material or liquid material in the space formed by the first and second protruding portions. 2. The molten material is a molten wax,
The apparatus for manufacturing a mixing element according to claim 1, wherein the mixing element is manufactured by a lost wax method by using a raw molding solidified in the space as a raw model. 3. The apparatus for manufacturing a mixing element according to claim 1, wherein the molten material is a molten material of the constituent material of the mixing element. 4. The apparatus for manufacturing a mixing element according to claim 1, wherein the liquid material is a sludge which is a constituent material of the mixing element. 5. The apparatus for manufacturing a mixing element according to claim 1, wherein the liquid material is a liquid material that is a constituent material of the mixing element.