JPH0838511A - Planetary centrifugal kneader,kneading method for preparing dental mixture,and vessel for centrifugal kneader - Google Patents

Abstract

PURPOSE: To obtain an apparatus applicable to various mixture used in dental technology by continuously kneading in order of preliminarily kneading step, transiting step and final step with predetermined rotating speed of an arm, and repeating the preliminarily kneading step and transiting step as needed before the final step. CONSTITUTION: Kneading is controlled to 100 to 500 rpm in the first step of preliminarily kneading at a rotating speed of a double arm 1, then to 0 to 50 rpm in the following transiting step, and to a faster rotating speed than the speed of the preliminary mixing step in the third final step. And, the continuous kneading of the first step and the following transiting step is repeated, as required, before the final third step. One of bucket holders 2, 3 can contain a bucket measuring its tare capable of taking a balance of movable parts. The bucket measuring its tare has a weight distributed uniformly to rotary shafts 5, 13 corresponding to normal dosage of a product to be kneaded.

Description

Detailed Description of the Invention

[0001]

[Industrial applications]

The present invention relates to a planetary centrifugal kneader for the preparation of a mixture used in the dental field, for accommodating at least one bucket consisting of a bottom and a substantially cylindrical peripheral side wall.

[0003]

2. Description of the Related Art

Kneaders are well known in the prior art, for example as described in the applicant's French Patent No. 90/12904.

Such a kneader mainly comprises a movable double arm which is rotationally driven around a main shaft, and the shaft has means for rotationally driving a bucket holder provided with a detachable bucket at its free end. I have it.

Such a kneader has made it possible to improve the quality of the kneading with respect to the previous devices. However, it is mainly adapted to the kneading of alginate. For the preparation of other products such as flowable or kneadable silicones, amalgams or cements, such kneaders are not practically adapted and the practitioner has to utilize different equipment. The first object of the present invention is to propose a multifunctional device adapted for various mixtures used in dental technology.

[0007]

[Means for Solving the Problems]

For this reason, the invention provides that the rotating arm extends perpendicularly to the bottom of the bucket holder on one of the free ends,
The second which makes an angle of about 40 to 60 degrees with the main axis
Involved in a kneader equipped with a bucket holder extended by the axis of the. The other free end is provided with a second bucket holder cooperating with a bucket without a central column, the normal of said second bucket holder being at an angle b below a vertical line b.
Make The kneader further comprises at least one first type bucket with a hollow central post suitable for cooperating with the second shaft of the first bucket holder and a cylinder without a central hollow shaft. A second type of shape, comprising at least one bucket.

According to a particular embodiment, the second type of accessory consists of a container (ball) with an oval cross section.

Preferably, the second type of attachment is constituted by a transparent insert with a channel extending along the longest axis of the elliptical cross section. This transverse channel can introduce into the insert pre-compounded capsules (amalgam, ionomer glass cement) which can reciprocate in this channel.

According to a variant, the second type of accessory consists of a tare.

According to another variant, the second type of accessory consists of a small injector which is also introduced into an insert also provided with a channel.

According to a particular embodiment, the kneader is adapted to enable the delivery of at least one jet below the powder towards the bottom of the container, in the vicinity of the central column of the container of the first type. A water tank is provided to supply at least one nozzle located at.

The present invention is further aimed at preventing the formation of "dama" and improving the homogeneity of the mixture.
Therefore, the present invention is a centrifugal kneading method for preparing a mixture used in the dental field in a planetary centrifugal kneader including the centrifugal kneader described above, and the rotation speed of the arm is 100 minutes per minute. The first step of pre-kneading which is from 0 to 500 rotations, the transition step in which the rotation speed of the arm is from 0 to 50 rotations per minute; the third step of kneading in which the rotation speed of the arm is higher than the speed during pre-kneading. It also concerns the method consisting of and.

The invention further relates to a container for a planetary centrifugal kneader with a weight of predetermined weight. This weight also contributes to the purpose of the invention, which is concerned with improving the homogeneity of the mixture by improving the balance of the arms of the kneader.

Preferably, the container for the planetary centrifugal kneader comprises an at least partially conical central column with a cylindrical coaxial hollow shaft.

This form of central pillar reduces the risk of "dama" formation.

Preferably, the container according to the invention comprises a removable lid cooperating with the outer surface of the side wall by means of an annular skirt.

A simplified version eliminates the bucket holder axis to introduce different types of containers therein, but has an annular skirt that is reinforced and extended, with one arm.
It consists of a book-only kneader. The alginate container, of course, preserves its central pillar.

That is, the means for solving the problems of the present invention are as follows.

First, there is provided a centrifugal kneading method for preparing a mixture used in the dental field in a planetary centrifugal kneader, which comprises:
A first step of pre-kneading in which the rotation speed of the arm is 100 to 500 rotations per minute, and a transition process in which the rotation speed of the arm is 0 to 50 rotations per minute; the rotation speed of the arm is the speed during pre-kneading A third step of greater kneading; the first step followed by a succession of transition steps can be repeated, if necessary, before the final step: a dental mixture preparation characterized by: Kneading method for.

Secondly, a container for a centrifugal kneader for carrying out the method described in the first item, which is equipped with a weight of a predetermined weight.

Thirdly, in the container described in the second,
A container having an at least partially conical central column with a cylindrical coaxial hollow shaft.

Fourth, the container for the planetary centrifugal kneader according to the third, wherein the container is provided with a detachable lid that cooperates with the outer surface of the side wall by an annular skirt.

Fifth, a dentistry of the kind having a movable double arm which is rotationally driven about a main axis, said axis being provided with rotary drive means for a movable bucket holder at the tip of its free end. At least one for the preparation of a mixture used in the field, comprising a bottom and a peripheral side wall of generally cylindrical shape
In a planetary centrifugal kneader for accommodating one bucket, for carrying out the method as described above, one of the free ends extends perpendicular to the bottom of the bucket holder,
A bucket holder extended by a second axis making an angle a between the main axis and between approximately 40 and 60 degrees, the other free end of which comprises a second bucket holder cooperating with a bucket without a central post; The normal of the bottom of the bucket holder of is at an angle b less than a with respect to the vertical line, and
At least one bucket of the first type with a hollow central column suitable for cooperating with the second axis of the first bucket holder, and a cylindrical second without a central hollow shaft. Centrifugal kneader, characterized in that it comprises at least one accessory of the type.

Sixth, in the centrifugal kneader according to the fifth aspect, the accessory of the second type comprises a container having an elliptical inner cross section.

Seventhly, in the centrifugal kneader according to the sixth aspect, the second type of accessory is constituted by an insert having a flow path extending across the longest axis of the elliptical cross section. A centrifugal kneader characterized in that

Eighth, the centrifugal kneader according to the seventh aspect, wherein the bucket is provided with a weight.

Ninth, in the centrifugal kneader according to the eighth, the accessory of the second type consists of an insert with a flow path, in which the tip is closed and the diameter is the diameter of the injector. Centrifugal kneader characterized in that an injector with a piston held at the other end is introduced by means of a larger screw, the injector is fixed in an accessory and closed.

Tenth, in the centrifugal kneading machine according to any one of the fifth to ninth, at least 1 toward the bottom of the container in the vicinity of the central column of the first type container.
Centrifugal kneader, characterized in that it is provided with a water tank for feeding at least one nozzle arranged to allow the delivery of one jet.

[0031]

【Example】

The present invention may be better understood by reading the following description with reference to the accompanying drawings.

FIG. 1 is a schematic sectional view of a movable part of the kneading machine according to the present invention. FIG. 2 is a longitudinal sectional view of the first type container. FIG. 3 is an end view of the cut portion along AA of the container. FIG. 4 is a sectional view of a first variant of the second type of container. FIG. 5 is a sectional view of a second variant of the second type container. FIG. 6 is a cross-sectional view of a third variant of the second type container.

The general details of the work on the double arm (1) and the drive mechanism have not been described above, but they differ from the embodiment of the moving part of the device described in the applicant's French patent 90/12904. Because there is no.

The movable part includes two bucket holders (2,
It differs from the prior art in that the property of 3) is different. The first bucket holder (2) consists of a pinion gear with a bottom (4) perpendicular to its axis of rotation (5) and comprises a bearing (6). The rotation axis (5) is the vertical main axis (7)
It makes an angle of about 45 degrees.

The free end (8) opposite the arm (1) carries a second bucket holder (9) having a bottom (10) extending by a longer annular skirt (11). The bottom (10) is attached to the rotating shaft (12) via a bearing (13). The rotation axis (14) of the second bucket holder makes an angle b of about 30 degrees with respect to the vertical main axis (7). In a modified embodiment, the bearing can be integral with the arm and the shaft is movable with respect to the arm.

The second bucket holder (3) has no central column.

2 and 3 are end views of longitudinal and transverse cuts, respectively, along the AA of the first type of container, which are arranged in the bucket holder (2).

The container consists of a cylindrical container (15) of oval cross section with a central column (16) of oval cross section.
A lid (17) having an annular flange (18) is attached to the container (1
5) Fit on the outside. A tubular hollow shaft (19) coaxial with the post (16) ensures cooperation with the rotary shaft of the kneader arm. As an example, the height of the container is 65 mm and the radius of curvature between the bottom (20) and the side wall (21) of the container is between 6 and 8 mm. The central column (16) has a conical upper part (22) so that the powder slides on the wall during filling.

The major axis of the column is 26 millimeters and is parallel to the major axis of the side wall (21) of the container. The short axis of the central column (16) is 12 millimeters. Tubular hollow shaft (19)
Has a diameter of 15 millimeters.

One of the bucket holders (2, 3) can store a tared bucket that can balance the moving parts. These tare-measured buckets are equipped with weights evenly distributed with respect to the axis of rotation, corresponding to the usual dose of the product to be kneaded.

As an example, for a kneader capable of preparing 1 to 4 doses of alginate, the effective fill amount is 2
Between 5 and 100 grams.

The kneader is equipped with a set of containers which are identifiable by a number and a color on the lid, for example indicating the number of doses. For example, for a container that weighs 50 grams when empty and without weight,

The first container is for receiving 25 grams of a dose of alginic acid and water, and is equipped with a weight of 75 grams; and the second container is 50 grams of 2 doses of alginic acid. It is for receiving water and is equipped with a 50 gram weight. The third container is for receiving 75 grams of 3 doses of alginic acid and water and is equipped with a 25 gram weight. The fourth container is intended to receive 100 grams of 4 doses of alginic acid and water, without a weight.

This embodiment can guarantee a constant balance regardless of the number of volumes adjusted.

The container is pre-filled with powder.
In use, water is added by pouring water from multiple jets directed to the bottom of the container near the central column (16).
The jet comes from a set of nozzles arranged in an oval on the container. Its direction is approximately perpendicular to the bottom (approximately 20 degrees to the normal of the bottom of the container, passing through the center of the column). This jet wets the elliptical area at the base of the column causing the floating powder to rise above the liquid.

The nozzle is integral with the base of the kneader, and on top of that the base is also provided with a receptacle for positioning the container during preparation of the mixture.

The nozzle is supplied by a roller pump or
It is possible to determine the amount of liquid introduced in the container,
It is carried out by any mechanical means such as a manual piston pump. The container is prepared in advance by a dental assistant who fills it with 1, 2, 3 or 4 doses of alginate powder. The container is then stored and water is added just before kneading. Thanks to the nozzle, the water is jetted into the container under the powder, and in this way it can be distributed and wet the entire surface of the bottom of the container, which is a necessary condition for obtaining a high quality kneading. is there.

FIG. 4 is a sectional view of a first variant of the accessory of the second type accessory holder (3).

It consists of a cylindrical device (25) with a transverse channel (26). The transverse channel (26) is partially closed by an annular rib (27). The device is capable of introducing any kind of capsule (28), including bec capsules.

The capsule (28) contains amalgam or cement. During operation, the capsules are discharged from one of the transverse channels to the other. The impact of the impact received causes the two parts of the capsule to be pressed together, eliminating the need to manually manipulate it as in conventional devices.

FIG. 5 shows a longitudinal sectional view of a second variant of an accessory for receiving an injector (29) containing a substance (30) to be kneaded. The injector (29) is closed at one end by a plug (31) and at the other end by a piston (32) held by a captive screw (33). The stopper and screw are held firmly by the edges of the bucket holder.

FIG. 6 shows a cross-sectional view of another accessory for the second type of bucket holder.

The accessory consists of a large injector (38) capable of directly containing the material to be kneaded (37). This embodiment makes it possible to eliminate the kneading vessel and the capture spatula.

The shape of the injection machine (3) is similar to the shape of the kneading container and eliminates the blind spot.

The cross-sectional shape can be circular or rectangular and is closed directly by the bucket holder (3). It is also possible to slide in the transverse channel of the device described with reference to the previous figure.

The injector has a plug (36) at one end,
The other end is closed by a piston (35) of equivalent material that can take the shape of the front of the syringe by rubber or elastic deformation. The piston is actuated by a component with stabilizing fins that can replace the retaining screw (34) used during kneading.

Although the present invention has been described above, it is provided by way of example and not limitation.

[0059]

【The invention's effect】

The device according to the invention can be adapted to the various mixtures used in the dental art.

Further, according to the present invention, it is possible to prevent the formation of "dama" and improve the homogeneity of the mixture.

[Brief description of drawings]

FIG. 1 is a schematic sectional view of a movable part of a kneading machine according to the present invention.

FIG. 2 is a longitudinal sectional view of a first type container.

FIG. 3 is an end view of a cut portion along AA of the container.

FIG. 4 is a sectional view of a first variant of a second type container.

FIG. 5 is a sectional view of a second variant of a second type container.

FIG. 6 is a sectional view of a third variant of the second type of container.

[Explanation of symbols]

 1 Double Arm 2 Bucket Holder 3 Bucket Holder 4 Bottom 5 Rotating Shaft 6 Bearing 7 Main Spindle 8 Free End 9 Bucket Holder 10 Bottom 11 Annular Skirt 12 Rotating Shaft 13 Bearing 14 Rotating Shaft 15 Container 16 Center Column 17 Lid 18 Flange 19 Tubular Hollow Shaft 20 Bottom 21 Sidewall 22 Top 25 Device 26 Cross flow path 27 Rib 28 Capsule 29 Injector 30 Kneading substance 31 Stopper 32 Piston 33 Capturing screw 34 Holding screw 35 Piston 36 Plug 37 Kneading substance 38 Injector

Claims (10)

[Claims] 1. A centrifugal kneading method for the preparation of a mixture used in the dental field in a planetary centrifugal kneader, the first step of pre-kneading wherein the rotation speed of the arm is 100 to 500 rotations per minute. , A transition process in which the rotation speed of the arm is 0 to 50 revolutions per minute; a third process of kneading in which the rotation speed of the arm is higher than the speed during pre-kneading; the first process and the subsequent transition process Can be repeated, if necessary, before the final step: a centrifugal kneading method for the preparation of dental mixtures, characterized in that 2. A container for a centrifugal kneader for carrying out the method according to claim 1, comprising a weight having a predetermined weight. 3. Container according to claim 2, characterized in that it has an at least partially conical central column with a cylindrical coaxial hollow shaft. 4. A container for a planetary centrifugal kneader according to claim 3, characterized in that it comprises a removable lid cooperating with the outer surface of the side wall by means of an annular skirt. 5. In the field of dentistry of the type having a movable double arm which is driven to rotate about a main axis, said axis being provided at the tip of its free end with a rotary drive means of a movable bucket holder. Planetary centrifugal kneading for carrying out the method according to claim 1, for accommodating at least one bucket comprising a bottom and a peripheral side wall of generally cylindrical shape for the preparation of the mixture to be used. In the machine, one of the free ends is provided with a bucket holder extending perpendicularly to the bottom of the bucket holder and extended by a second axis making an angle a between the main axis and approximately 40 to 60 degrees, and the other free end. The end comprises a second bucket holder cooperating with a bucket without a central column, the normal of the bottom of said second bucket holder making an angle b less than or equal to a with respect to a vertical line, and
At least one bucket of a first type, with a hollow central column suitable for cooperating with the second axis of a bucket holder of, and a cylindrical second type without a central hollow shaft. A centrifugal kneader characterized in that it comprises at least one accessory: 6. The centrifugal kneading machine according to claim 5,
Centrifugal kneader, characterized in that the second type of accessory consists of a container with an oval cross section. 7. The centrifugal kneading machine according to claim 6,
Centrifugal kneader, characterized in that the accessory of the second type is constituted by an insert with a channel running along the longest axis of the elliptical cross section. 8. The centrifugal kneading machine according to claim 7,
Centrifugal kneader characterized in that the bucket is equipped with a weight. 9. The centrifugal kneader according to claim 8,
A second type of fitting consists of an insert with a flow path, into which the injector is introduced, with the tip closed and the piston held at the other end by a screw whose diameter is larger than the diameter of the injector. A centrifugal kneader characterized in that the injector is fixed in the accessory and closed. 10. Centrifugal kneader according to any one of claims 5 to 9, wherein at least one jet is delivered towards the bottom of the container in the vicinity of the central column of the container of the first type. Centrifugal kneader, characterized in that it is provided with a water tank for feeding at least one nozzle arranged to enable.