JP2002263119A - Paste mixer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a paste mixer which is capable of yielding a paste mixture which is evenly mixed as a whole at all times even when the plurality of pastes varying in the ease of movement because of difference of their viscosities to a paste mixing section from paste housing sections are mixed. SOLUTION: An auxiliary member 3 to diminish the sectional area of a paste discharge port 2a of the one paste housing section 1a packed with the paste of the lower viscosity is inserted into this paste housing section 2a and the rear end 6a of the paste mixing section 5 is fitted to the paste discharge port 2a in order to hinder the movement of the auxiliary member 3 to the paste mixing section 5 as the pastes are discharged.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a paste mixing apparatus. More specifically, the present invention relates to a paste mixing apparatus suitable for mixing a paste such as a dental paste or the like in which a small amount and a precise mixing ratio are required.

[0002]

2. Description of the Related Art Industrial adhesives, sealing materials, etc., which are stored as a plurality of pastes and mixed when used, are used in various fields. Such a material in which a plurality of pastes are mixed at the time of use is widely used in the dental field as an adhesive, a filling / restoring material, an impression material, a denture base material, a denture base repair material, and the like. Conventionally, as a method of mixing the pastes, a method of taking out the pastes stored in the storage containers in an approximate amount and kneading them with a mixing rod has long been adopted. However, paste materials in the field of dentistry have to be cured in a short period of time of several tens of seconds to several minutes, and in a fixed time. Therefore, it is required that the mixing ratio of a plurality of pastes to be mixed is always constant. I have. In recent years, in order to solve the above-mentioned problem, filling a paste into a paste storage container having a paste discharge port having a specific diameter, and moving an extruding member inserted into the paste storage container by a predetermined distance. Therefore, a paste mixing apparatus is used in which the paste is extruded at a constant ratio every time.

[0003]

However, some pastes to be mixed have a considerably high viscosity, and such pastes are often not discharged smoothly even when an extrusion pressure is applied. This is because paste with high viscosity has high resistance to extrusion, so even if you try to push in the extrusion member and discharge the paste, the extrusion member is elastically deformed at the initial stage of extrusion, so that the paste is only that much It is considered that the ejection is not performed.

[0004] Therefore, when the viscosity of a plurality of pastes to be mixed is greatly different, the paste having a high viscosity is kept in the paste storage portion until the stress generated due to the deformation of the extruding member antagonizes the force resisting the extrusion of the paste. Is not discharged from the paste discharge port, whereas the paste having low viscosity is discharged almost smoothly. Therefore, at the beginning of the extrusion, only the paste having the lower viscosity moves to the paste mixing section. For this reason, the paste initially discharged from the paste mixing unit is not mixed at all with only the paste having the lower viscosity, or the ratio of the paste having the lower viscosity is considerably larger than the predetermined ratio. Phenomenon occurs.

[0005] Such a phenomenon requires that the amount used in a single application such as for dental use is small, and that the mixed paste must have uniform physical properties, that is, the whole paste is uniformly mixed. This is a serious problem for materials that require this.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and even when pastes having different viscosities are mixed, it is possible to obtain a mixed paste in which the entire paste is uniformly mixed, that is, each time the paste has stable physical properties. It is an object of the present invention to provide a paste mixing apparatus that can perform the above-mentioned operations.

[0007]

The inventors of the present invention have made intensive studies to solve the above-mentioned problems, and as a result, have reduced the cross-sectional area of the discharge port of the paste storage section storing the paste having a relatively lower viscosity. Thereby, the resistance to the discharge of the paste is increased, whereby the resistance to the discharge between a plurality of pastes having different viscosities can be made substantially constant,
As a result, they have found that it is possible to always obtain a mixed paste in which the entire paste is uniformly mixed.

As a method for reducing the cross-sectional area of the paste discharge port, an auxiliary member for reducing the cross-sectional area of the discharge port is provided inside the paste discharge port, and the auxiliary member is moved in the direction of the paste mixing section. It has been found that it is advantageous in various respects to fit the rear end of the paste mixing section into the paste discharge port so as to prevent the paste mixing section from interfering, thereby completing the present invention.

That is, the present invention provides a paste mixing apparatus comprising a plurality of paste storage sections each having a paste discharge port, and a paste mixing section for mixing a plurality of pastes discharged from the paste discharge ports. At least one of the outlets is provided with an auxiliary member for reducing the sectional area of the discharge port, and a rear end portion of the paste mixing section so as to prevent the auxiliary member from moving in the paste mixing section direction. Is mounted inside the paste discharge port.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described with reference to the drawings showing typical embodiments, but the present invention is not limited to these.

FIG. 1 is a sectional view showing one embodiment of a typical paste mixing apparatus of the present invention. Paste storage units 1a, 1
b has paste discharge ports 2a and 2b, respectively. An auxiliary member 3 is provided inside the paste discharge port 2a of the paste storage portion 1a in which the paste having the lower viscosity (not shown) is filled, in order to reduce the cross-sectional area. In order to mix the pastes discharged from the respective paste discharge ports, paste mixing sections 5 are attached to the paste storage sections 1a and 1b via the discharge ports 2a and 2b. The rear end portions 6a and 6b of the paste mixing section 5 have a structure that fits inside the paste discharge ports 2a and 2b, respectively. In addition,
In FIG. 1, the auxiliary member 3 is provided only in the paste discharge port 2a, but may be attached to both the paste discharge ports 2a and 2b. Further, when there is a paste discharge port in which the auxiliary member is not provided, the rear end portion of the paste mixing section attached to the discharge port may not be fitted in the discharge port. .

The paste storage sections 1a and 1b have paste storage spaces 8a and 8b, respectively, and are filled with raw material pastes to be mixed. In FIG. 1, the paste storage sections 1a and 1b are cylindrical, and the discharge ports 2a and
The opposite end of 2b is open. When the extruding member 7 is pushed in from the opening ports 9a and 9b, each paste moves to the paste mixing section 5 through the paste discharge ports 2a and 2b. Each paste is mixed in the paste mixing section 5 to form a uniform mixed paste, which is discharged from the tip 10.

Further, in order to prevent the paste mixing section 5 from dropping from the paste discharge ports 2a, 2b with the discharge of the paste, the paste mixing section 5 and the paste storage sections 1a, 1a,
1 b is fixed by a locking member 11.

FIG. 2 is a partially enlarged perspective view of one of the paste accommodating portions 1a in FIG. 1, and FIG. 3 is a longitudinal sectional view of FIG.

As shown in the drawing, an auxiliary member 3 is provided inside the paste discharge port 2a of the paste storage section 1a. By mounting the auxiliary member 3, the cross-sectional area of the discharge port 2a can be reduced, and the resistance to the discharge of the paste (not shown) stored in the paste storage portion 1a is higher than when the auxiliary member 3 is not provided. growing. Therefore, when mixing a plurality of pastes having different viscosities due to different viscosities, the discharge port 2a of the paste storage portion 1a storing a paste which is easier to discharge (a paste having a lower viscosity) is provided. By disposing the member 3 inside, it is possible to make it difficult to discharge the paste. This allows
The resistance of the initial paste to ejection is substantially the same as that of the other paste, and as a result, the movement of each paste to the paste mixing section is always at a constant ratio, so that the resulting mixed paste is uniform as a whole.

By adopting a method in which the sectional area of the discharge port 2a is changed by the auxiliary member 3, the same paste accommodating portion 1a can cope with pastes having various viscosities. There is no need to manufacture paste storage units having discharge ports of various cross-sectional areas.
This is particularly effective for a dental paste mixing apparatus that is often produced in many kinds and in small quantities.

In FIGS. 2 and 3, the auxiliary member 3 is a cylindrical member having a constant thickness.
Is not limited to such a shape, a cylindrical shape having a non-uniform thickness in a vertical section with respect to the axis as shown in FIG. 4, and a plate-like shape having a semi-circular vertical cross section with respect to the axis as shown in FIG. It is also possible to use a cross-section or a three-pronged column having a cross section perpendicular to the axis as shown in FIG.

Similarly, the sectional shape of the discharge port 2a is not limited to a circle, but may be an ellipse or a polygon.

From the viewpoints of ease of molding, strength associated with the shape, and ease of fitting the auxiliary member into the discharge port, the discharge port 2
Advantageously, the auxiliary member 3 is a cylinder having a circular cross section and a size large enough to closely adhere to the inner surface of the discharge port 2a.

How much the cross-sectional area of the paste discharge port should be reduced, that is, how much the auxiliary member should be attached, depends on the paste to be used. Therefore, it is experimentally determined for each paste to be used. The same applies to a case where three or more pastes are mixed.

FIG. 7 is a partial view showing a state in which the rear end 6a of the paste mixing section 5 is fitted inside the paste discharge port 2a of the paste storage section 1a. FIG.
Shows a state in which the paste 4 is stored (filled) in the paste storage space 8a.

When the paste 4 is discharged, a pressure is applied to the auxiliary member 3 in the direction in which the paste flows, that is, the pressure applied to the paste mixing section. As shown in the figure, by attaching the end 6a of the paste mixing section 5 so as to fit inside the paste discharge port 2a, the movement of the auxiliary member 3 in the direction of the paste mixing section 5 is hindered. Dropout can be prevented.

The rear end portion 6 of the paste mixing section 5 is internally fitted to prevent movement, so that the paste storage section 5
Therefore, it is not necessary to employ a structure for preventing movement of the paste discharge port 2a, so that the structure of the paste storage container 1a can be simplified. In addition, the insertion of the auxiliary member 3 into the discharge port 2 can be performed from the side where the paste mixing unit 5 is mounted (the left side in FIG. 7), which facilitates the operation.

In FIGS. 1 and 7, as a method of moving the paste 4 from the paste storage sections 1a and 1b to the paste mixing section 5, the paste storage sections 1a and 1b are made cylindrical and the paste storage sections 1a and 1b are moved. Are formed at one end and paste openings 2a and 2b are formed at one end and open openings 9a and 9b are formed at the other end, and a pressure is applied to the paste by pushing an extruding member 7 through the open openings 9a and 9b. The paste storage sections 1a and 1b are formed of a rigid material.

If the paste storage portions 1a and 1b are formed of a rigid material and have a cylindrical shape having paste discharge ports 2a and 2b at one end and open ports 9a and 9b at the other end, the extruding member 7 is formed. Is proportional to the change in the volume of the space that can be occupied by the paste 4 in the paste storage spaces 8a and 8b of the paste storage units 1a and 1b, so that the amount of paste discharged from the paste discharge ports 2a and 2b is controlled. Becomes easier.

Further, the filling of the paste 4 into the paste storage sections 1a and 1b can be performed from the open ports 9a and 9b, which facilitates the work.

Further, since the structure of the paste accommodating portions 1a and 1b is extremely simple, the molding thereof is also easy.

The method of discharging the paste 4 from the paste discharge ports 2a and 2b is not limited to the above-described method. A well-known method such as a method of being formed of a deformable material and a method of mechanically pressing and holding the storage portion and a method of drawing out the storage portion under reduced pressure can be adopted without any limitation.

The paste mixing device of the present invention has a plurality of paste storage sections. In the case where the paste storage section is formed in a cylindrical shape having an opening at one end as described above, in order to simplify the structure when the paste storage section is combined with the extruding member or a paste mixing section described later, the discharge of each storage section is simplified. That the outlets 2a and 2b and the opening 9 are located at locations close to each other,
It is preferable that the axes of the cylindrical storage portions are parallel to each other, and the paste discharge ports are present in the same direction.

Each of the paste accommodating sections may be formed independently, but each of the paste discharge ports 2a, 2
b and the opening 9a, 9 for pushing in the pushing member 7
Since it is easy to make the interval of b constant, it is preferable that all the accommodating portions are integrally formed.

The paste mixing section 5 is not particularly limited as long as its rear end is fitted inside the paste discharge port 2a and can mix a plurality of pastes. In order to reduce the weight and to reduce the weight, it is preferable that the paste is extruded from the paste discharge port so that the paste moving in the mixing section is mixed with the movement.

Although such a structure is known, a typical example thereof is a structure in which screw-shaped short pieces are arranged in series in a cylinder as shown in FIG.

Further, as the paste is discharged, a force is exerted on the paste mixing section 5 to separate the paste from the paste discharge ports 2a and 2b. Therefore, the locking member 1 in FIG.
It is preferable to have a structure like 1.

[0034]

By using the paste mixing apparatus of the present invention, even when a plurality of pastes having different viscosities are mixed, each paste is always moved to the paste mixing section at a predetermined ratio. It is possible to obtain a mixed paste in which the whole is uniformly mixed.

Further, it is not necessary to form a large number of paste storage sections having discharge ports having different diameters according to the viscosity of the paste.
Furthermore, the structure can be extremely simplified.

[Brief description of the drawings]

FIG. 1 is a diagram (longitudinal sectional view) showing a typical practical embodiment of the present invention.

FIG. 2 is a partially enlarged perspective view of a paste storage section 1a in FIG.

FIG. 3 is a longitudinal sectional view of FIG. 2;

FIG. 4 is a view showing a form of an auxiliary member 3 which can be used in the present invention.

FIG. 5 is a view showing an embodiment of a shape of an auxiliary member 3 that can be used in the present invention.

FIG. 6 is a view showing a form of an auxiliary member 3 which can be used in the present invention.

7 is a partially enlarged longitudinal sectional view showing a state in which a rear end portion 6a of the paste mixing section 5 is fitted inside the paste discharge port 2a of the paste storage section 1a in FIG.

FIG. 8 is a view showing a typical structure of a paste mixing section 5;

[Explanation of symbols]

 1a, 1b: Paste storage section 2a, 2b: Paste discharge port 3: Auxiliary member 4: Paste 5: Paste mixing section 6a, 6b: Rear end of paste mixing section 7: Extruded member 8a, 8b: Paste in paste storage section Storage space 9a, 9b: Open port of paste storage section 10: Paste discharge port at tip of paste storage section 11: Locking member

Continued on front page F term (reference) 3E065 AA06 BB01 DA14 DA15 DB05 FA20 GA10 JA11 4C052 AA16 AA17 HH05 HH08 4G035 AB41 AC01 AE13 4G037 AA02 EA01

Claims (4)

[Claims] 1. A paste mixing apparatus comprising: a plurality of paste storage sections each having a paste discharge port; and a paste mixing section for mixing a plurality of pastes discharged from the paste discharge ports. In any one, an auxiliary member for reducing the cross-sectional area of the discharge port is provided, and the rear end of the paste mixing section is provided with a paste discharge port so as to prevent the auxiliary member from moving in the direction of the paste mixing section. A paste mixing device, which is fitted inside an outlet. 2. Each of the paste storage sections is cylindrical,
2. The paste mixing apparatus according to claim 1, wherein a paste discharge port is provided at one end of the storage section, and the other end is configured to be opened for mounting a paste extruding member. 3. The paste storage section is integrally formed so that the axes of the plurality of cylindrical paste storage sections are parallel to each other, and the paste discharge port is located at an end in the same direction. 3. The paste mixing device according to claim 2, wherein: 4. The paste mixing device according to claim 1, wherein the paste to be mixed is a dental paste.