JP2000317287A - Extruding kneader - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance the efficiency of kneading by realizing three dimensional kneading of materials to be kneaded, to make it easy to miniaturize and lighten the device and to provide an extruding kneader having a structure suitable even for manufacture by resin molding. SOLUTION: The extruding kneader is provided with a container body 10 having a first containing section (a) and a second containing section (b) which separately contain two kinds of materials having fluidity and with a kneading cylinder 20 connected to an end side of the container body and the materials in the container body are extruded to the end side by an extruding means, forced into the kneading cylinder and passed through the kneading cylinder to be kneaded. The kneading cylinder 20 has a function for rolling and overlapping the materials acting shearing force and compressing force to the materials forced into the kneading cylinder and a joining-dividing function causing joining and dividing of the materials within the kneading cylinder.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for kneading two kinds of fluid materials by press-fitting them into a kneading cylinder and passing them through the kneading cylinder. The present invention relates to a technique for kneading a material by applying a compressive force and a shearing force to the material itself while repeating the merging and division.

[0002]

2. Description of the Related Art When a dentist takes a tooth profile, a material called an impression material is used. In Japan, generally, a mixture of water and an alginic acid-based material is kneaded, but in Europe and the United States, a mixture of a silicon-based two-component resin is mainly used. Although this silicone resin has the disadvantage of being expensive, it has been gradually adopted in Japan due to its high impression accuracy and beautiful surface.

[0003] When mixing the two-liquid resin, two syringes (two-liquid storage container) are filled with the respective resin, and a resin such as a gun equipped with an extruding piston is used. The most common method is to extrude the mixture from the rear and push it through a stirrer called a mixing tip attached to the front of the syringe to mix.

[0004]

The above-mentioned mixing chip employs a so-called static mixer in which a liquid is kneaded while being divided into two parts.
However, this conventional mixing chip has problems to be solved in the following points.

[0005] The mixing tip of the static mixer type is suitable for mixing materials, but is not very efficient in terms of kneading efficiency. Therefore, in order to obtain the necessary degree of kneading with this mixing chip, the kneading path becomes longer, and accordingly, there is a problem that the total length of the mixing chip becomes longer.

That is, the static mixer is a tube-type mixer having no driving unit meaning a static mixer,
Specifically, a rectangular plate is twisted 180 degrees in the left and right opposite direction, and a plurality of elements are inserted into the tube, and the elements are arranged in the tube so as to be orthogonal to the left and right of each other. Therefore, the materials to be mixed passing through the static mixer are subjected to a so-called dividing action and a reversing action by a plurality of elements and mixed. At that time, since the compressive force and the shearing force hardly act on the material to be mixed, it is not so effective in terms of kneading efficiency.

Materials that need to be extruded in a sufficiently kneaded state, such as dental impression materials, exhibit better physical properties and properties as the degree of kneading is improved, and the curing time is shortened. It is an important factor.

[0008] Second, there is the problem of manufacturability. That is, since the mixing chip is small, it is preferable to be made of resin in terms of manufacturability and cost. However, depending on the shape of the element, not only the mold becomes complicated but also the structure in which the mold does not come off. Or a complicated punching die may be required.

The present invention has been made in view of the above points, and adopts the concept of positively changing the cross-sectional area in addition to the shape of the deformed passage, so that the three-dimensional material to be kneaded can be formed. It is an object of the present invention to provide an extrusion-type kneading apparatus which can achieve a further improvement in kneading efficiency by enabling a proper kneading, thereby facilitating reduction in size and weight. Another object of the present invention is to provide an extrusion-type kneading apparatus in which elements constituting a main part of the kneading apparatus have a structure suitable for production by resin molding.

[0010]

According to the present invention, there is provided a container body having a first storage portion and a second storage portion for separately storing two kinds of fluid materials,
A kneading cylinder connected to one end of the container main body, and the material in the container main body is pushed out to one end side by an extruding means to be pressed into the kneading cylinder and kneaded by passing through the kneading cylinder. Extrusion-type kneading apparatus, wherein the kneading cylinder has a function of rolling and stacking materials while applying a compressive force and a shearing force to the material pressed into the kneading cylinder,
The structure has a merging division function of causing the materials to merge and split in the kneading cylinder.

Here, the kneading cylinder has a main body cylinder into which the material is press-fitted, and a plurality of kneading elements inserted into the main body cylinder, and the kneading cylinder is provided between the inner surface of the main body cylinder and each element. A plurality of deformed passages whose cross-sectional shapes are changed as they go in the longitudinal direction of the main body cylinder, and a merging dividing means for causing merging and splitting of the material flowing through the deformed passage between the respective elements; You can also.

In this case, it is very preferable that at least one of the deformed passages has a structure in which the cross-sectional area gradually changes in the longitudinal direction of the main body cylinder. Further, it is also possible to adopt a configuration in which a portion having a gradually decreasing cross-sectional area and a portion having a gradually increasing cross-sectional area are provided in the middle of the deformation passage.

[0013] Further, at one end side of the container main body, there is provided a mouthpiece portion for forming an outlet of the material in the first storage portion and the second storage portion,
A configuration in which a large-diameter tube portion that fits outside the mouth tube portion may be provided on the base end side of the main body tube.

Also, the outlets of the materials in the first accommodating portion and the second accommodating portion are provided side by side in the mouthpiece portion, and a confluent portion of two kinds of materials is provided in the large-diameter tubular portion of the main body tube. It may be configured to be continuous with the passage.

As the two kinds of fluid materials, a dental impression material made of a silicone-based two-liquid resin is very suitable.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the attached FIGS. FIG. 1 is a plan view of a main part showing an extrusion-type kneading apparatus according to the present invention, FIG. 2 is a longitudinal sectional view thereof, and FIG. 3 is a left side view showing a part in a sectional view.

The extrusion-type kneading apparatus according to the present embodiment is a resin having a first storage section a and a second storage section b for separately storing two kinds of fluid materials such as a silicone two-liquid resin. And a kneading cylinder 20 made of the same resin and connected to the distal end of the container body 10.

The first accommodating portion a and the second accommodating portion b are arranged in parallel in a two-line system as shown in FIGS. And
Both of the housing portions a and b are formed in a cylindrical shape except for a tip portion. Both the accommodating portions a and b are integrally formed by a common wall c. Although the base ends of the two accommodating portions a and b are open, in a state in which the material is packed inside each of the accommodating portions a and b, a closing plate (shown in the drawing) that serves as a substantial piston necessary for closing the openings and pushing out the material. Are provided. That is, the container body 10 has a cartridge structure.

On the distal end side of the container body 10, there are formed mouthpieces 5, 5 which form outlets for contents. The two mouthpiece portions 5, 5 are arranged in two, and one of the mouthpiece portions 5 is the first accommodating portion a.
, And the other mouthpiece 5 communicates with the second housing part b.

A flange-shaped receiving part 6 is formed around the mouthpiece parts 5,5. Pressing claws 7, 7 are formed on both sides of the receiving portion 6 so that a connecting movable frame 30 described later can be slid on the surface of the receiving portion 6 from above.

The kneading cylinder 20 is shown in FIGS. 1 to 3 and FIGS.
As shown in the figure, the main body tube 11 into which the material is press-fitted, and a plurality of kneading members (eight in the figure) inserted into the main body tube 11
Element group 12 composed of the elements 12A and 12B
0, and a supply guide 130 provided on one side of the element group 120.

A tip end of the main body cylinder 11 has a cylindrical spout 12.
And the base end side is formed in the square tube portion 13. A flange 14 having a uniform protruding length around the square tube portion 13
Are formed. This flange 14 is for mounting,
It is designed to have a size and a shape that fits into a concave portion 6a formed on the upper surface of the receiving portion 6 of the container body 10.

A cylindrical portion 15 is formed between the rectangular tube portion 13 and the main body tube 11. The main body tube 11 has a rectangular tube shape, and the element group 120 is inserted into the main body tube 11 to fit therein.

The connecting movable frame 30 is for detachably connecting the mixing tube 20 to the container body 10 and is a frame-shaped resin member having a plan shape shown in FIG. 10 and a sectional shape shown in FIG. Consists of Specifically, it has a first opening 31, a second opening 32, and a third opening 33 from left to right in FIG. These three openings are continuous, but differ in size and shape. The first opening 31 is the largest rectangle, and the second opening 32 is a rectangle slightly smaller than the first opening 31. The third opening 33 is the smallest and is elongated.

Of these openings, the first opening 31 and the second opening 31
The opening 32 has an important function. The first opening 31 is the kneading cylinder 2
0 is used when attaching / detaching to / from the container body 10, and the second opening 32
Is used when the kneading cylinder 20 is attached to the container body 10 and maintained in a connected state.

That is, the movable frame 30 is configured to be fitted into the concave portion 6a of the container body 10 and to slide in the longitudinal direction. At this time, the holding claws 7 are configured so as to suppress the upper surfaces on both sides of the movable frame 30 and prevent the movable claw 30 from floating upward. On both sides of the second opening 32, band-shaped portions 321 and 321 wider than both sides of the first opening 31 in a plan view are formed.

These strip portions 321 are formed by the second openings 32.
In this regard, the size of the opening is made smaller than that of the first opening 31 and is positively formed. Thereby, at the time of connection shown in FIG. 2, the flange 14 of the main body cylinder 11 is pressed down from above on the lower surfaces of both band-shaped portions 321 and can be fixed in a state of being in close contact with the surface of the concave portion 6a. ing.

Therefore, the width dimension α of the second opening 32
Is formed to be approximately the same as the width between the opposing outer surfaces of the rectangular tube portion 13 of the main body tube 11 or slightly larger than the width by the fitting tolerance. The thickness and the like of the movable frame 30 are determined based on the correlation with the depth of the recess 6a, the height of the holding claw 7, and the like.

Element group 1 loaded in main body cylinder 11
Numeral 20 is made of resin. As shown in FIGS. 12 to 14, two types of elements 12 are connected via a thin shaft-shaped connecting portion 121.
A and 12B are integrally connected alternately and coaxially. The supply guide section 130 connected to one side of the element group 120 is also made of resin, and has a large-diameter cylindrical section 131 and two small-diameter cylindrical sections 132 and 132.

The portion of the large-diameter cylindrical portion 131 is the main cylinder 1
It is configured such that it fits in one cylindrical portion 15 and two small-diameter cylindrical portions 132 fit in the rectangular cylindrical portion 13. Also,
The two small-diameter tubular portions 132 are set so as to enter and fit into the mouthpiece portions 5 and 5 of the container body 10.
The large-diameter cylindrical portion 131 is a junction of the small-diameter cylindrical portion 132, and thereby, the first accommodating portion a and the second accommodating portion b of the container body 10.
Is in communication with the kneading cylinder 20.

The element group 120 forms, between the inner surface of the main body tube 11 and each element, a plurality of deformed passages 1 and 2 whose cross-sectional shapes and cross-sectional areas change along the longitudinal direction of the main body tube 11. A merging / dividing means for merging and dividing the material flowing through each of the deformed passages 1 and 2 is formed between the respective elements.

That is, a deformed passage as shown in FIGS. 15A, 15B, and 15C is formed in the main body cylinder 11 at one end and the other end of one element 12A and between them. You. FIG. 15A is a cross-sectional view taken along the line II in FIG.
(B) is a cross-sectional view taken along a roll line, and (c) is a cross-sectional view taken along a ha-ha line. In FIGS. 15 and 17, FIG.
Are shown for easy understanding of the corresponding relationship with the elements 12A and 12B shown in perspective views.

As can be understood from these drawings, two deformation passages 1 and 2 are formed in the main body cylinder 11. Each of the deformed passages 1 and 2 is arranged in a form vertically divided by a partition 3 on the entrance side in FIG. 15A, and arranged in a form divided on the exit side in FIG. . The cross-sectional area is narrowed in the middle of (b). In other words, each of the deformed passages 1 and 2 has a shape in which the cross-sectional area is gradually reduced to a substantially square shape while changing from a horizontally long rectangle to a vertically long rectangle, and then returns to a rectangle having a forward dimension cross section.

In the illustrated example, the size of each of the deformed passages 1 and 2 in the intermediate portion (c) is set to about half (1) of the inlet side and the outlet side.
/ 2). The direction (twist direction) of the two deformation passages 1 and 2 in the element 12A is shown in FIG.
The form that changes clockwise in the order of 5 (a), (b), and (c) is defined here as a clockwise twist direction.

FIG. 16 shows two types of elements 12A, 1
It is a perspective view which shows the shape of 2B specifically. In FIG. 16, the entire shape of the element 12B is
It is clearly shown that the shape is opposite to that of A. That is, in the element 12B, each of the deformed passages 1 and 2 formed by the element 12B is formed as shown in FIGS. 17 (a), (b) and (c).
As shown in the order, the screw is formed to have a counterclockwise twist direction.

The two types of elements 12A and 12B
Are formed with four tapered surfaces T1 and T2 for each element in order to change the cross-sectional area of the deformation passage (see FIGS. 15 and 17). T1 indicates a tapered surface from the entrance to the intermediate portion, and T2 indicates a tapered surface from the intermediate portion to the exit. In FIG. 16, due to the perspective view,
Three or two tapered surfaces are shown for each element.

A kneading method using such an extrusion-type kneading apparatus will be described below with reference to FIG. Here, the element 12
The change of the cross section of the material to be kneaded when two (two stages) A and 12B are connected is shown in a model diagram, focusing on the area of the inlet, intermediate, and outlet of each element.

When using the extrusion-type kneading apparatus, the kneading apparatus is mounted on an extrusion machine (not shown) such as a gun equipped with a piston, as in the prior art. When the two kinds of kneaded materials accommodated in the two accommodating portions a and b of the container main body 10 are pushed out by the piston, the two supply guide portions 130 connected to one side of the element group 120 are moved.
The fluid flows into the large-diameter cylindrical portion 131 via the two small-diameter cylindrical portions 132, 132, and is sent from the small-diameter cylindrical portions 132 to the respective deformation passages 1, 2. The material to be mixed to be fed is divided into A and B at the entrance by the first-stage element 12A. The cross sections of the kneaded materials at this time are both rectangular. These rectangles are divided into horizontal and vertical depending on the viewpoint. Here, they are defined and displayed as vertical rectangles.

Next, in the middle part of the first stage,
The materials to be kneaded A and B both change to a square, and at the outlet of the first stage, both change to a horizontally long rectangle. Therefore, the materials A and B to be kneaded are vertically elongated rectangles.
In the process of changing from a square to a horizontally long rectangle, the cross-sectional shape of the deformed passages 1 and 2 is changed while being continuously compressed by the inner wall surfaces thereof. As a result, a continuous convection phenomenon occurs in the material to be kneaded itself, particularly in the radial direction of the cross section.

An important point to note here is the three-dimensional kneading action caused by the reduction of the cross-sectional area by half in the middle part of the deformed passage. That is, since the cross-sectional area of the deformed passage is reduced toward the intermediate portion, the kneaded materials A and B
Receive compression action from the entire inner wall surface of the corresponding deformed passage. Furthermore, since the cross-sectional area gradually increases from the intermediate portion toward the outlet, the materials A and B to be kneaded are particularly subjected to a shearing force, and the cross-sectional shape changes so as to expand. Therefore, in these processes, a compressive force and a shear force act on the material to be kneaded between the inlet and the outlet in the press-fitting direction of the material to be kneaded (the longitudinal direction of the deformation passage), and the material is three-dimensionally formed. Is kneaded. Thereby, the first kneading operation is performed.

Next, at the entrance of the element 12B of the second stage, the partition 3 intersects with the partition 4 of the exit of the first stage. The materials A and B have a form divided into four parts A and B and A and B as shown in the figure. Then, the materials A and B to be kneaded are pressed into each of the deformed passages 1 and 2. At this time, at the entrance of the second stage,
In each of the deformed passages 1 and 2, A and B merge so as to overlap each other vertically, and their cross-sectional shapes are both vertically elongated rectangles.

Next, in the middle part of the second stage, the materials A and B to be kneaded are changed into a square as a whole, and in the outlet part, both are changed into a horizontally long rectangle. Also in the second stage, the materials A and B to be kneaded change from a vertically long rectangle to a square to a horizontally long rectangle,
The inner wall surfaces of the corresponding deformation passages 1 and 2 change their cross-sectional shape while undergoing continuous compression and shearing action in the radial direction of the cross section and the longitudinal direction of the deformation passage.
As a result, a continuous convection phenomenon occurs in the material to be kneaded itself, particularly in the radial direction of the cross section and the longitudinal direction of the deformation passage,
As a result, a second kneading operation is performed.

Although the third stage is not particularly shown, as shown in FIG. 18, a virtual line X1 is added to the figure showing the cross-sectional shape of the second stage outlet of the material to be kneaded.
At the third-stage entrance portion, A, B, A, and B, which are divided right and left from the virtual line X1 and overlap vertically, merge. Thereafter, kneading is performed in the same manner as in the first and second stages. Thus, the material to be kneaded is kneaded extremely efficiently by the three-dimensional kneading action.

By the way, an experiment was conducted on the degree of kneading when using a dental impression material made of a silicon-based two-component resin as the kneading materials A and B. As a result, the kneading degree was faster than that using a conventional static mixer. Solidification, elastic strain,
The result was that the permanent set was also generally small. This means that the kneading efficiency is extremely good as compared with the conventional one.

As described above, the elements 12A, 1
When the element group is constituted by 2B, it is extremely effective when the element group is made of resin. This is because, for example, in the deformed passage 1 of the element 12A, the intermediate portion between the inlet and the outlet has a small cross-sectional area (about （of the inlet) as described above. It is because it can be molded into. That is,
The deformation passage 1 is tapered from the entrance toward the middle part,
As it tapers from the exit toward the middle,
Basically, it suffices to use only two mold dies, and it is easy to manufacture the mold in addition to the moldability.

As can be understood from this, the cross-sectional size (cross-sectional area) of the intermediate portion of the deformed passage is smaller than the cross-sectional size of the inlet or the outlet in terms of both kneading efficiency and resin moldability. Is preferable. Furthermore, when only the resin moldability is considered, it can be said that the size of the cross section of the intermediate portion is preferably such that one side thereof is equal to or less than the length of the short side of the rectangle of the entrance or exit.

As shown in the figure, it is very preferable to employ two types of elements 12A and 12B in which the directions (twisting directions) of the deformation paths 1 and 2 are different. In this case, as shown in the embodiment, the elements 12A and 12B are used by being alternately connected by the connecting portion 121. As a result, the directions (twisting directions) of the deformation paths of the adjacent elements are opposite to each other. That is, the outlet of the element 12A is rotated 90 degrees to the right with respect to the inlet, as viewed from the inlet side, whereas the outlet of the element 12B is rotated 90 degrees to the left with respect to the inlet, as viewed from the inlet. It has become.

The use of the two types of elements has the effect of further increasing the kneading efficiency. That is, if the same type of element is connected, a straight through path may be formed in a part of the deformed path, but if the two types of elements are connected, such a straight through path is not formed at all. This is because the kneading efficiency according to the theory is obtained.

The change in the cross-sectional area of the deformed passages 1 and 2 can be set so that the cross-sectional area of one element gradually decreases from the entrance to the exit. Further, the element has an element in which the cross-sectional area of the deformed passages 1 and 2 gradually decreases from the inlet to the outlet of the element, and an element in which the cross-sectional area of the deformed passage gradually increases from the inlet to the outlet of the element. May be included. Also in that case, a configuration may be adopted in which the two elements are alternately connected and used.

In the above embodiment, the deformed passages 1, 2
Although the example in which the cross-sectional area of the intermediate portion is set to の of the inlet or the outlet is shown, it is needless to say that the cross-sectional area may be set to 以下 or less or １ ／ or more as necessary. . Further, the position where the cross-sectional area becomes minimum may be shifted in the length direction of the deformation passage.

Further, in the embodiment, the example of the element forming the two deformed passages 1 and 2 has been described, but the present invention is applicable to the element forming three or more deformed passages. Can be. In this case, of course, as the number of partitions for forming a plurality of deformed passages increases, the kneading efficiency improves, but even within one deformed passage, the kneading efficiency dramatically improves. The reason for this is that, for example, when the cross-sectional shape of the material to be kneaded is changed from a vertically long rectangle to a horizontally long rectangle, the longer the rectangles are, the larger the flow range accompanying the deformation (compression and shearing) of the material to be kneaded becomes. Because it becomes.

However, depending on the degree of fluidity and particle size of the material to be kneaded, it may be better not to subdivide the inlet portion. Further, it is preferable to set the number of divisions and the size of the sectional area according to the viscosity and plasticity of the material to be kneaded.

In the illustrated embodiment, an example is shown in which eight stages (eight in FIG. 2) of elements are provided, but more or less elements may be connected as necessary. Of course, you can do that.

Further, in the embodiment, an example in which two types of elements having different configurations are connected alternately has been described, but three or more types of elements having different configurations may be sequentially connected and used.

Further, in the embodiment, an example has been shown in which the main body tube 11 is formed in a rectangular tube shape and the deformation passages 1 and 2 are formed in a rectangular cross section. The group 120 may also have a configuration in which the periphery is circularly rounded to correspond thereto. Of course, even in this case, it is needless to say that the variation of the cross section of the deformed passage is basically substantially the same as that of the square shape.

In the embodiment, the element group 12
Although 0 is configured to connect a plurality of elements 12A and 12B via the connecting portion 121, it may be configured as a separate object from the beginning. In such a case, it is very preferable to provide a means for positioning the elements by means of an uneven portion or the like so that the elements do not rotate relative to each other. Further, as a material to be kneaded, any material having appropriate fluidity can be applied to various materials that require kneading, other than the dental impression material.

[0057]

As described above, according to the present invention, it is possible to knead the material to be kneaded three-dimensionally by adopting the concept of positively changing the cross-sectional area in addition to the shape of the deformed passage. As a result, it is possible to further improve the kneading efficiency, thereby providing an extrusion-type kneading apparatus that can be easily reduced in size and weight. Further, according to the present invention, it is possible to provide an extrusion-type kneading apparatus in which elements constituting a main part of the kneading apparatus have a structure suitable for production by resin molding.

[Brief description of the drawings]

FIG. 1 is a plan view of an extrusion-type kneading apparatus according to an embodiment of the present invention.

FIG. 2 is a longitudinal sectional view of an extrusion-type kneading apparatus according to an embodiment of the present invention.

FIG. 3 is a side view of a main part of the extrusion-type kneading apparatus according to the embodiment of the present invention.

FIG. 4 is a plan view of the container body according to the embodiment of the present invention.

FIG. 5 is a longitudinal sectional view of the container body according to the embodiment of the present invention.

FIG. 6 is a side view of a main part of the container body according to the embodiment of the present invention.

FIG. 7 is a plan view of a main body tube according to the embodiment of the present invention.

FIG. 8 is a longitudinal sectional view of the container body according to the embodiment of the present invention.

FIG. 9 is a side sectional view of the container body according to the embodiment of the present invention.

FIG. 10 is a plan view of a connection movable frame according to the embodiment of the present invention.

FIG. 11 is a side view of the connection movable frame according to the embodiment of the present invention.

FIG. 12 is a plan view of an element group according to the embodiment of the present invention.

FIG. 13 is a front view of an element group according to the embodiment of the present invention.

FIG. 14 is a side view of an element group according to the embodiment of the present invention.

15A and 15B show cross-sectional shapes of respective portions of a deformed passage in a clockwise twist direction according to the embodiment of the present invention, and FIG.
3 is a cross-sectional view along the line II in FIG. 3, and FIG.
FIG. 4C is a cross-sectional view taken along the line B-C. FIG.

FIG. 16 is a perspective view of an element according to the embodiment of the present invention.

FIG. 17 shows a cross-sectional shape of each portion of a deformed passage having a counterclockwise twist direction according to the embodiment of the present invention.
FIGS. 15 (a), (b), and (c) show FIGS.
It is sectional drawing corresponding to each sectional view of (c), respectively.

FIG. 18 is a process chart showing a change in the cross-sectional shape of the material to be kneaded.

[Explanation of symbols]

 1, 2 Deformation passage 3, 4 Partition 5 Mouth tube portion 6 Receiving portion 6a Depression 7 Holding claw 10 Container body 11 Main body tube 12 Spout 121 Connecting portion 12A, 12B Element 120 Element group 13 Square tube portion 130 Supply guide portion 14 Flange 20 Kneading cylinder T1, T2 Tapered surface A, B Material to be kneaded

Claims (5)

[Claims] 1. An extruder comprising: a container body having a first storage portion and a second storage portion for separately storing two kinds of fluid materials; and a kneading cylinder connected to one end of the container body. Means for extruding the material in the container body to one end side thereof by means of press-fitting into the kneading cylinder, and kneading by passing through the kneading cylinder, wherein the kneading cylinder is the kneading cylinder. A function of rolling and stacking the material while applying a compressive force and a shear force to the material pressed into the inside,
An extrusion-type kneading apparatus having a merging / splitting function for causing a material to join and split in a kneading cylinder. 2. The kneading cylinder has a main body cylinder into which the material is press-fitted, and a plurality of kneading elements inserted in the main body cylinder, between the inner surface of the main body cylinder and each element. A plurality of deformed passages whose cross-sectional shape changes as they go in the longitudinal direction of the main body cylinder, and further, between each element, a merging / dividing means for causing merging and division of the material flowing through the deformed passage is formed; The extrusion-type kneading apparatus according to claim 1, wherein at least one of the deformed passages has a cross-sectional area that gradually changes in a longitudinal direction of the main body cylinder. 3. The extrusion-type kneading apparatus according to claim 2, wherein a portion having a gradually decreasing cross-sectional area and a portion having a gradually increasing sectional area are provided in the middle of the deformation passage. 4. A barrel portion forming an outlet for a material in a first storage portion and a second storage portion on one end side of the container body,
The extrusion-type kneading apparatus according to claim 1 or 2, wherein a large-diameter tube portion that fits outside the mouth tube portion is provided on a base end side of the main body tube. 5. The extrusion-type kneading apparatus according to claim 1, wherein the two fluid materials are dental impression materials made of a silicone-based two-liquid resin.