JPH05237839A - Agitating blade - Google Patents

Abstract

PURPOSE:To provide an agitating blade, with which agitating target housed in a tubular container can be agitated fully. CONSTITUTION:An agitating blade 40 has a plate-like blade part 41 having a shape laying parallel with the inner wall 25a and bottom face 25b of a container 25. On the blade part 41, a plurality of notches 44 and 45 and through holes 51-54 are formed with a rotating shaft 42a between. Further, about the rotating shaft 42 near the middle of the blade part 41, guide vanes 61-66, each of which projects horizontally for guiding agitating target P downwards and, at the same time, extends obliquely and vertically, are formed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a stirring object, for example,
The present invention relates to a stirring blade used for stirring a casting material in a casting operation.

[0002]

2. Description of the Related Art Casting work is performed by injecting a casting material such as a polyurethane mixed solution into a casting mold which has been manufactured in advance using a master model and then curing it. This is the work of making cast products. And
In such a casting operation, it is important to mix the main ingredient of the casting material and the curing agent and to stir them sufficiently.

When stirring such casting materials,
Conventionally, for example, a casting material is received in a container having a spherical bottom surface, and a stirring blade having a semicircular shape along the bottom surface is provided with a rotary shaft slightly inclined with respect to the vertical direction of the container. It was rotating to the center. As a result, the casting material was stirred in the horizontal direction as well as in the vertical direction, which enabled efficient stirring.

[0004]

However, in the container having the spherical bottom surface as described above, a cylindrical container having the same diameter and height (having a flat bottom surface) is used.
However, there is a problem that the amount of the casting material that can be received is small and the size of the casting product that can be manufactured is limited.

The present invention has been made in view of the above problems, and an object thereof is to provide a stirring blade capable of sufficiently stirring an object to be stirred received in a cylindrical container.

[0006]

In order to achieve the above object, the stirring blade of the present invention has a plate-shaped blade portion having a shape along the inner wall and bottom surface of the container. A plurality of notches or through holes are separately formed in the blade portion so as to sandwich a rotating shaft extending in the vertical direction. Further, around the rotation axis in the vicinity of the center of the blade portion, guide vanes are formed that project horizontally in order to guide the stirring target downward and extend obliquely in the vertical direction.

A notch may be formed in a part of the lower end of the blade to form a flow space for freely flowing the object to be stirred between the inner wall and the bottom of the container.

[0008]

When the agitating blade as described above is rotated about the axis of rotation, the agitating object in the container is agitated in the rotating direction (horizontal direction), while the agitating object near the center of the container is guided by the guide vanes. Is guided downward while being pushed out to the outer peripheral side of the container. In this way, a vertical flow occurs in the stirring target, and the stirring target is efficiently stirred.

When the container is tilted to let the object to be stirred flow out from the container, the container is placed above the blade through a space formed between the notch provided in the blade and the inner wall and bottom of the container. All the objects to be stirred that have been accumulated can be discharged.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows the entire vacuum casting machine 1 equipped with a stirring blade according to the present invention. The main body 10 of this vacuum casting machine 1 has two continuous top and bottom
Two decompression chambers (a first decompression chamber 11 and a second decompression chamber 12) are formed separately on the left and right sides.

Mixing and injecting devices 20 and 20 are attached to the upper portions of the decompression chambers 11 and 12, respectively. As shown in detail in FIG. 2, the mixing and injecting device 20 is composed of a curing agent introducing device 21, an injecting device 22, and a stirring device 23. An A cup 24 that receives an accurately measured amount of the curing agent is removably held in the curing agent feeding device 21 with its pouring port 24a facing the center of the decompression chamber 11. Further, a B cup (which is a “container” in the claims) 25 that receives a measured casting base material is detachably held in the injection device 22 with its spout 25a facing forward. It The B cup 25 is
It has a cylindrical shape and its bottom surface is almost flat.

A stirring device 23 is attached to the upper part of the injection device 22, and the B cup 2 is attached to the stirring device 23.
The stirring blade 40 is attached which extends into the inside of 5 and is rotated. As shown in detail in FIG. 3, the stirring blade 40 has a blade portion 41 that is inserted into the B cup 25 that has received the casting material (object to be stirred) P, and upward from the center of the upper portion of the blade portion 41. The mounting shaft portion 42 is integrally formed so as to extend. Therefore, by vertically mounting the mounting shaft portion 42 on the stirring device 23, the blade portion 41 rotates rightward in the horizontal direction (clockwise in plan view) about the rotation shaft 42a extending in the vertical direction.

The rotating blade portion 41 is formed in a plate shape, and its outer shape is along the inner wall 25a and the bottom surface 25b of the B cup 25. Further, as shown in the drawing, a notch (hereinafter referred to as an “upper notch”) 44 that slopes downward to the right is formed in the upper right portion of the blade 41, and a slope 44 that slopes downward to the right is formed in the lower left portion. A cutout (hereinafter, referred to as “lower cutout”) 45 is formed. Therefore, the lower cutout 45 forms a circulation space 45a between the inner wall 25a and the bottom surface 25b of the B cup 25, in which the casting material P can freely flow.

Further, in the upper left part, the right center part, the left center part and the lower right part of the blade part 41, from the front surface (surface shown in FIG. 3) 41a side of the blade part 41 to the back surface (not shown in FIG. 3). Through holes 51 to 54 are formed so as to penetrate to the surface 41b side. In the following, the upper left portion is the first through hole 51, the right central portion is the second through hole 52, the left central portion is the third through hole 53, and the lower right portion is the fourth through hole. It is called a hole 54. In this way, the notches 44 and 45 and all the through holes 51 to 54 are formed so as to be divided into right and left so as to sandwich the rotary shaft 42a and to have three stages in the vertical direction.

Further, in the vicinity of the rotary shaft 42a on the surface 41a of the blade portion 41, the second portion from above the first through hole 51 is provided.
A first guide vane 61 is formed so as to descend to the right so as to be connected to the upper side of the through hole 52. This first guide blade 6
As shown in FIG. 4, No. 1 projects in the horizontal direction (vertical direction in FIG. 4), and the projecting width 61h increases as it approaches the rotating shaft 42a. And what was formed similarly to such a 1st guide blade 61 is below the 1st through-hole 51 in the surface 41 (above the 3rd through-hole 53), and below the 2nd through-hole 52 (the 4th through-hole). (Above the holes 54), and below the third through holes 53 and the fourth through holes 54.
It is also provided between the lower part of. The upper ones are referred to as a second guide vane 62 and a third guide vane 63, respectively.

On the other hand, between the upper portion of the upper notch 44 and the lower portion of the first through hole 51 on the back surface 41b of the blade portion 41, the second portion
Between the upper part of the through hole 52 and the lower part of the third through hole 53, and the fourth
The fourth guide blade 64 is also formed between the upper portion of the through hole 54 and the lower portion of the lower cutout 45 in the same manner as the first guide blade 61 and the like (therefore, the inclination direction is leftward downward when viewed from the surface 41a side). , A fifth guide blade 65 and a sixth guide blade 66 are provided.

As shown in FIG. 2, a jaw 27 is attached to the lower front portion of the B cup 25, and a hose 28 extending to the lower portion of the first decompression chamber 11 is connected to the lower portion of the jaw 27. Has been done. Also, FIG.
As shown in FIG. 3, in the pump rack 30 provided outside the main body 10, vacuum pumps (first vacuum pump 31 and second vacuum pump 32) provided for each decompression chamber are provided.
Is attached.

In the vacuum casting machine 1 thus constructed,
For example, the silicon mold S1 is placed in the first decompression chamber 11 as shown in FIG. On the other hand, the mixing and injecting device 20 of the first decompression chamber 11 is equipped with the A cup 24 that has received the curing agent and the B cup 25 that has received the main component of the casting material. Then, the first vacuum pump 31 is operated and left for a predetermined time to remove air bubbles in the curing agent and the main agent (this is called vacuum defoaming).

When this vacuum degassing is completed, the curing agent charging device 21 is next operated to charge the curing agent from the A cup 24 into the B cup 25, as shown in FIG. Then, the stirring blade 40 of the stirring device 23 is rotated to mix and stir the main agent and the curing agent.

Here, as shown in FIG. 5, the stirring blade 40
When is rotated about the rotation shaft 42a, the casting material P is rotated and stirred in the horizontal direction. At this time, since the blade portion 41 rotates along the entire surface of the inner wall 25a and the entire surface of the bottom surface 25b of the B cup 25, uneven stirring does not occur. Furthermore, B
The casting material P existing near the center of the cup 25 is guided by the first to sixth guide blades 61 to 66 so as to be pushed downward, and the centrifugal force generated by the rotation of the blade portion 41 causes the B cup 25. Extruded towards the outside of. As a result, the casting material P moves through the through holes 51 to 54 and the circulation space 45a, etc., as indicated by the chain line in the figure. Then, as the casting material P is extruded downward one after another in this manner, a vertical flow occurs in the casting material P, and the casting material P is also stirred in the vertical direction.

In this stirring device 23, the stirring blade 4
After rotating 0 for a predetermined time (for example, 10 seconds), it is stopped for a predetermined short time (for example, 1 second) to perform an intermittent operation. Thereby, the stirring efficiency of the casting material p can be further improved.

After sufficiently mixing and stirring as described above, the operation of the stirring device 23 is stopped and the injection device 22 is operated so that the B cup 25 is tilted forward together with the stirring device 23 for casting. The material P is poured into the jogo 27. At this time, as shown in FIG.
The casting material P on the lower side of the stirring blade 40 smoothly flows out of the B cup 25 as it is, but the casting material Pa on the upper side of the stirring blade 40 also passes through the circulation space 45a.
Can flow downwards and then out of the B-cup 25. Therefore, due to the presence of the stirring blade 40, B
Outflow of the casting material P into the cup 25 is not hindered.

Thus, all casting material is injected into the silicon mold S1 through the hose 28. And
After this injection is completed, the inside of the first decompression chamber 11 is returned to the atmospheric pressure, the silicon mold S1 is taken out, and cured in a drying furnace (not shown). And silicon type S1
Is released and the cast product is completed. In addition, the second
The casting operation using the silicon mold S2 can also be performed in the decompression chamber 12. As a result, by using the casting machine 1, two casting operations can be performed simultaneously (however, independently of each other).

[0024]

As described above, when the stirring blade of the present invention is used, since the blade portion has a shape along the inner wall of the container, etc., the stirring object can be moved horizontally (direction of rotation of the stirring blade). Not only can the mixture be stirred evenly, but the stirring target in the vicinity of the center of the container can also be stirred in the vertical direction by guiding the stirring target downward. Therefore, even if a cylindrical container having a large capacity is used, the object to be stirred received in the container can be sufficiently and efficiently stirred.

In addition, when the object to be stirred is caused to flow out from the container by tilting the container, the upper part of the blade part or the like is passed through the flow space formed between the notch provided in the blade part and the inner wall and bottom surface of the container. All the objects to be stirred that have accumulated can also be discharged. Therefore, it is convenient, for example, when an accurate amount of the object to be stirred is stirred and then taken out and used.

[Brief description of drawings]

FIG. 1 is a perspective view of a vacuum casting machine equipped with a stirring blade according to the present invention.

FIG. 2 is a front view of a mixing injection device equipped with the stirring blade.

FIG. 3 is a front view of the stirring blade.

FIG. 4 is a plan view of the stirring blade.

FIG. 5 is a conceptual diagram showing a stirring state of a stirring target by the stirring blade.

FIG. 6 is a front view showing a state in which the stirring target object is caused to flow out from the container.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Vacuum casting machine 11,12 Decompression chamber 20 Mixing injection device 23 Stirring device 25 B cup (vessel) 40 Stirring blade 41 Blade part 42a Rotating shaft 44,46 Notch 45a Distribution space 51-55 Through hole 61-66 Guide blade

Claims (2)

[Claims] 1. A stirring blade that is inserted into a container that receives an object to be stirred and rotates around a rotation shaft extending in the up-down direction to stir the object to be stirred, having a shape along an inner wall and a bottom surface of the container. A plurality of notches or through holes are separately formed in the plate-shaped blade portion having the rotary shaft, and the agitating object is lowered around the rotary shaft near the center of the blade portion. An agitating blade, which is characterized in that a guide vane is formed so as to project in a horizontal direction and extend obliquely up and down for guiding to. 2. A notch is formed in a part of a lower end of the blade portion to form a circulation space that allows the stirring object to freely flow between the inner wall and the bottom surface of the container. The stirring blade according to claim 1.