WO2007125632A1

WO2007125632A1 - Device for kneading dental investment material

Info

Publication number: WO2007125632A1
Application number: PCT/JP2007/000020
Authority: WO
Inventors: Masaki Usui
Original assignee: Denken Co., Ltd.
Priority date: 2006-04-26
Filing date: 2007-01-18
Publication date: 2007-11-08
Also published as: JPWO2007125632A1

Abstract

The rotation speed and rotation direction of a stirring blade are associated with the angle and direction of rotation operation of a shuttle dial (31d) rotatable in the left-right directions. In setting an operation program, a control section (30) causes the stirring blade to rotate by controlling a motor (18) in real time so that the motor (18) is associated with the amount of rotation operation and rotation direction of the shuttle dial (31d). A worker performs kneading work by actually using an investment material and operating the shuttle dial (31d), and while visually confirming conditions of the kneading, the worker adjusts the operation of the shuttle dial (31d) to set a parameter that forms the operation program. The parameter is stored in a course program storage section (34) in a manner associated with a course. When the worker presses a start key (31a) after selecting a course by a course selection key (31c), an operation program corresponding to the selected course is read and the stirring blade rotates according to the operation program. Thus, an operation program can be easily set.

Description

Specification

Implanting material mixing device for dental technicians

Technical field

[0001] The present invention relates to a dentist that mixes and kneads implants for forming a forging mold in the process of producing various dental prostheses such as inlays, crowns, metal floors, implants, and implant upper structures. The present invention relates to an investment material kneading apparatus.

Background art

[0002] If some or all of the teeth are lost due to caries, periodontal disease, etc., not only chewing, sound function decline, and appearance change, but also adversely affect health. Therefore, it is important to treat early and repair missing teeth. As a method of repairing this, a method of replacing a defective portion with a metal forging is widely used. The shape of the teeth varies from person to person, and the size and shape of the missing part is not uniform. Therefore, in dental treatment, it is not possible to mass-produce prostheses that make up the missing part, and it is necessary to produce prosthetics with different shapes according to the case of each individual. In addition, to obtain an accurate occlusion, it is necessary to produce a prosthesis with high accuracy. In order to obtain an appropriate forged product satisfying these requirements, forging by the so-called Ross Wax method has been conventionally performed.

[0003] In forging by the lost wax method, a forging mold formed of wax is set in a metal forging ring, and a liquid investment material (or sometimes called forging material) is placed in the forging ring. Pour into the forged prototype. Then, when the wax is incinerated by heating after curing the investment material, the remaining mold is completed with the portion corresponding to the forged prototype as a cavity. By pouring and melting the alloy melted by heating in this saddle shape, a forged toothpick prosthesis is completed.

[0004] The melting point is relatively low (1 100 ° C or less) as an alloy for forging. When gold alloy, silver alloy, etc. are used, A gypsum-based investment material having relatively low heat resistance can be used. On the other hand, the melting point is relatively high as an alloy for the saddle type (more than 130 ° C). When cobalt chrome alloy is used, heat resistance is also required as investment material, so phosphate-based investment material with high heat resistance is used.

In any case, the above-mentioned investment material is produced by adding water or a dedicated kneading liquid to the investment material powder and mixing and kneading. Conventionally, the operation of mixing and kneading the investment material has been performed manually, but recently, it is often performed using a dedicated kneading apparatus as described in Patent Document 1, for example. In the kneading device described in Patent Document 1, the upper end of the shaft of the stirring blade inserted into the stirring vessel can be engaged with the lower end of the drive shaft provided in the adsorption portion of the kneading device, In the engaged state, the upper surface of the lid of the stirring container abuts on the suction part, and the stirring container is sucked and held by the suction part by vacuum suction through an intake hole provided in the lid. . Then, by rotating the stirring blade while keeping the inside of the container in a vacuum atmosphere, mixing and kneading are performed by stirring the investment material powder stored in the stirring container and a liquid such as water.

[0006] As described above, the kneading work is simply a work of mixing the investment material powder with water or a special liquid to make a mud, but depending on the type (composition) of the investment material, the water mixing ratio, etc. If the agitation is not performed at an appropriate rotation speed and time, the investment material powder will cause deterioration of the surface quality of the residual structure, etc. In addition, air bubbles are mixed in the mud and this causes the formation of bumps (spherical protrusions) in the fabricated product. Such surface roughness and fine spherical protrusions can be removed by polishing, but this takes time for polishing work and causes an increase in Rikosu.

[0007] The motion control of the stirring blade in the kneading apparatus as described above has three parameters: rotational speed, rotational direction, and rotational time. According to the optimum operation program according to the type of investment material, etc. It is desirable to perform stirring. Therefore, conventionally, there are commercially available devices that allow an operator to set a plurality of operation programs in advance and select an appropriate operation program to perform operation during agitation (Non-patent Document 1, etc.) See)

[0008] In such a conventional kneading device, a series of, that is, one agitation operation of investment material is performed by inputting numerical values such as rotation speed and time by key operation or the like. The driving program is to be completed. Therefore, it is necessary for the operator to input numerical values one by one for the parameters required for the operation program while imagining the degree of kneading, which not only makes the operation complicated, but also confirms the actual kneading state at the time of entry. Can not do it. Therefore, in order to confirm whether or not the operation program once set is appropriate, it is usually necessary to perform a confirmation operation using the actual investment material after setting the program. If found, it will take time to correct the driving program. For this reason, the operation program setting work is inefficient and cumbersome. Therefore, it is necessary for a person skilled in the work to set up an operation program, which is difficult for unskilled and inexperienced people.

Patent Document 1: Japanese Patent Laid-Open No. 10-328208

Non-Patent Document 1: “Computer Control 'Fully Automatic Vacuum Power Mixer Web Mix VPM2”, [on I ine], Tokyo Dental Industry Co., Ltd. [Search April 20, 1998], Internet <URL: http: / /www.tokyodent al.co.jp/products/wh i pm ix / k01_03vpm2 / 01/01 index, html>

Disclosure of the invention

Problems to be solved by the invention

[0010] The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a dental technique investment material that can easily and efficiently set an operation program. It is to provide a sum device.

Means for solving the problem

[0011] The present invention, which has been made to solve the above problems, rotates a stirring blade loaded in a container while evacuating a substantially hermetically sealable container containing an investment material inside. In the dental material mixing equipment for dental technicians

a) an operation means capable of rotating in both directions around a reference angular position;

b) driving means for rotationally driving the stirring blade;

c) According to the amount of rotation operation and the rotation operation direction from the reference angle position of the operation means Linked control means for associating the rotational speed and rotational drive direction of the stirring blade and controlling the drive means for rotating the stirring blade in conjunction with the rotational operation of the operating means;

d) during the period in which a series of drive operations of the stirring blade according to the rotation operation of the operation means is executed under the control of the interlock control means, the rotational speed of the stirring blade, the rotational drive direction, And control information storage means for acquiring and storing parameters related to time, and

e) an operation control means for controlling the drive means so as to reproduce a series of drive operations of the stirring blades using parameters stored in the control information storage means;

It is characterized by having.

Here, the control information storage means may be a non-volatile memory such as a flash memory.

[0013] Further, the operation means can be used regardless of its output format as long as it has a rotor position (angle) detection function.

That is, as a first aspect of the present invention, the operation means is a shuttle dial that outputs a pulse signal corresponding to a rotation operation angle from a reference angle position, and the connection control means It is possible to adopt a configuration that executes control in which the rotation speed and the rotation drive direction of the stirring blade are associated with each other according to the rotation operation angle and the rotation operation direction from the reference angle position.

[0015] Further, as a second aspect of the present invention, the operation means is a rotary potentiometer, and the interlock control means reads a partial pressure taken out from a movable electrode of the potentiometer, It may be configured to execute control in which the rotation speed and the rotation drive direction of the stirring blade are associated with each other according to the rotation operation amount and the rotation operation direction from the reference angle position of the shaft.

[0016] For example, in the dental technique investment material kneading device according to the first aspect, the operator sets the parameters of the operation program by rotating the shaft dial. That is, in order to set the operation program, For example, if the shuttle dial is rotated to the left or right by a predetermined angle from the reference angle position with the investment material powder and water set in the device, the interlock control means receives this operation and the interlock control means rotates the shuttle dial. By controlling the driving means in conjunction with the moving operation, the stirring blade is rotated at a predetermined rotational speed in a predetermined direction. Therefore, the operator should adjust the rotation angle, direction, and operation time of the shuttle dial appropriately while visually confirming that the investment material is actually mixed and mixed with the stirring blade. Change, adjust, and try to achieve an appropriate mix. At that time, the operating program is the change in the rotation speed and direction of the agitating blade with the passage of time from the start to the end of the rotation of the shuttle dial, that is, the time from the start to the end of the agitating blade rotation by the drive means Parameters relating to the rotational speed, rotational drive direction, and time of the agitating blade during the series of drive operations are stored in the control information storage means.

[0017] When it is desired to execute the stirring operation according to the operation program set as described above, for example, a predetermined operation is performed in a state where the investment material is placed in the container and set in the apparatus. Then, the operation control means reads out the parameters stored in the control information storage means, that is, the information indicating the change in the rotation speed and the rotation direction with the passage of time from the rotation start time of the stirring blade, By controlling the driving means so as to reproduce, the stirring blade is rotated at a predetermined rotational speed in a predetermined direction. As a result, the kneading operation according to the driving program set using the shuttle dial can be executed at any time.

The invention's effect

[0018] As described above, according to the investigating material kneading apparatus for dental technicians according to the present invention, the operator can visually confirm the kneading state when the investing material is actually agitated, for example, kneading is performed. If it is insufficient, the operation program can be set while adding judgment and countermeasures such as increasing the kneading time or increasing the rotation speed. Therefore, it is necessary to set an appropriate operation program for good kneading compared to the conventional case where the operation program is set by numerical input while imagining or remembering the kneading state. Can do. In addition, once set operation program Therefore, there is no need to perform an operation to verify whether or not it is appropriate, and the workability is also good.

[0019] Further, since the amount and direction of rotation of the operation means such as the shuttle dial and the potentiometer, or the actual time holding the rotation operation state is converted into the parameters of the operation program as it is, The operator does not need to pay particular attention to the rotation speed and time values, and the operation program setting work is facilitated. In addition, even relatively unskilled and inexperienced people can set up driving programs with few mistakes.

[0020] Since the optimum operation program varies depending on the type of investment material, etc., the dental material investment device kneading apparatus according to the present invention has a plurality of course selection operation units, and each course has a different operation program. It is desirable that the parameters relating to the rotational speed, rotational drive direction, and time of the agitating blade are associated with each other.

[0021] Further, since the kneading state actually changes depending on the environmental temperature, humidity, etc., as described above, stirring is performed according to a preset operation program using the parameters stored in the control information storage means. Even if you want to perform an action, you often want to extend the kneading time a little while running. Therefore, in order to cope with such a situation, the operation control unit executes a predetermined operation at an arbitrary point in the middle of reproducing a series of driving operations of the stirring blade. In order to maintain the rotational speed and rotational drive direction of the stirring blades, the control may be changed so as to control the drive means.

[0022] Specifically, for example, when an operator presses a specific operation key, the rotational speed and rotational drive direction of the stirring blade executed at the start point of the press (strictly before the start) It is maintained while the key is being pressed, and when the operation key is released, the control is performed to return to the state immediately before the start of pressing the previous operation key and complete the remaining operation program. be able to.

[0023] With this, when the worker can determine that the kneading is insufficient while visually confirming the kneading state, the kneading time is extended immediately by the time considered to be necessary, thereby achieving reliable kneading. can do. Brief Description of Drawings

[0024] FIG. 1 is a side longitudinal sectional view showing a schematic structure of an implantable material kneading apparatus for dental technicians according to an embodiment of the present invention.

FIG. 2 is a block diagram of the electrical system of the dental material investment material kneading apparatus according to the present embodiment.

FIG. 3 is a plan view of an operation panel arranged on the front surface of the housing.

[Fig. 4] Diagram showing the correspondence between the shuttle dial rotation and the stirring blade rotation

FIG. 5 is a diagram showing an example of an operation program pattern.

FIG. 6 is a flowchart showing the procedure of kneading work and the operation of the apparatus.

FIG. 7 is a block diagram of an electric system of an investment material kneading apparatus for dental technicians according to another embodiment.

[Fig. 8] A diagram showing the correspondence between the rotation angle of the potentiometer and the output value of the AZ D converter.

Explanation of symbols

[0025] 1 ... Main unit

1 0 ... pedestal

1 1 ... post

1 2… Housing

1 3 ... Container adsorption part

1 3 a ring

1 4… Intake chamber

1 5… Drive shaft

1 6… Bearing

1 7 ... Mating recess

1 8… Motor

1 9 ... Intake pipe

2 ... Stirring container

2 1… Stirring container

2 2 ... Lid 2 3… Agitator shaft

2 4… stirring blade

2 5… Mating convex

2 6… intake hole

3 0… Control section

Ding

3 0 1-"AZ D converter

3 1… Operation section

3 1

3 1 b… Program key

3 1 c ... Course selection key

3 1 d… Shuttle dial

3 1 e… potentiometer

3 2… Display section

3 3… Pressure sensor

3 4… Course program storage

3 5… Motor drive

3 6… Vacuum pump

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, an investment material kneading apparatus for dental technicians according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a side cross-sectional view for schematically showing the structure of a dental technique kneading apparatus according to this embodiment. This kneader is roughly divided into a main body 1 and a stirring vessel 2.

[0027] The stirring vessel portion 2 has a substantially bottomed cylindrical transparent glass or resin stirring vessel.

2 1, a lid 2 2 that can be attached to the upper surface opening to seal the stirring vessel 21 1, a stirring shaft 2 3 that passes through the center of the lid 2 2 up and down, and is rotatably provided; A stirring blade 24 attached to the lower part of the stirring shaft 23, and a fitting convex portion 25 which is a hexagonal port attached to the upper end of the stirring shaft 23. . The lid body 2 2 is provided with a plurality of intake holes 26 extending vertically around the stirring shaft 2 3. On the other hand, in the main body 1, a support column 11 is provided upright on the rear part of the base 10, and a box-shaped housing 12 is provided on the support column 11. On the lower surface of the housing 1 2, there is provided a container adsorbing part 13 for mounting the stirring container part 2, and an O-ring as a seal member is provided in the annularly recessed groove in the container adsorbing part 13. 1 3 a is inserted. An intake chamber 14 that is recessed upward is formed in a portion surrounded by the O-ring 13 a of the container suction portion 13. Above this intake chamber 14, a drive shaft 15 extending in the vertical direction is rotatably held by a bearing 16, and an inner surface is formed at the lower end of the drive shaft 15 protruding inside the intake chamber 14. A fitting recess 17 having a hexagonal shape is attached. The upper end of the drive shaft 15 is fixed to the motor shaft of the geared motor 18 as a drive source. Furthermore, one end of an intake pipe 19 is connected to the intake chamber 14, and the other end of the intake pipe 19 is connected to a vacuum pump (not shown).

[0029] The kneading apparatus of the present embodiment does not include a vacuum pump, and is provided separately from the main body 1. This is so that an appropriate vacuum pump can be used for the convenience of the user, and it is of course possible to incorporate a vacuum pump.

FIG. 2 is a block diagram of an electrical system block of the dental technique investment material kneading apparatus according to the present embodiment, and FIG. 3 is a plan view of an operation panel arranged on the front surface of the housing 12.

[0031] As shown in FIG. 2, the control unit 30 functioning as the interlock control means and the operation control means in the present invention is configured mainly with a microcomputer including a CPU, a RAM, a ROM, etc. Section 3 0 includes start key 3 1 a, program key 3 1 b, course selection key 3 1 c, operation section 3 1 including shuttle dial 3 1 d, display section 3 2 including a numeric display, and the above A pressure sensor 3 3 for detecting the air pressure in the intake chamber 14 is connected. In addition, the control unit 30 has a course program storage unit (corresponding to the control information storage unit in the present invention) 3 4 such as a flash memory (non-volatile memory) that retains the stored contents even when the power is cut off. Connected to the motor 1 via the motor drive 3 5 Controls the operation of 8 and the on / off operation of the vacuum pump 3 6.

As shown in FIG. 3, the start key 3 1 a, the program key 3 1 b, and the plurality of course selection keys 3 1 c are so-called membrane switches. The shuttle dial 3 1 d is an optical rotary switch that can be rotated in the left-right direction around the click position, and has seven click positions on the left and right. The start key 3 1 a gives instructions for starting and ending the operation, and the program key 3 1 b gives instructions for the user to memorize the operation program as will be described later, and the course selection key 3 1 c Gives an instruction to select the operation program to be executed, and the shuttle dial 3 1 d is used to set the content of the operation program.

[0033] In the dental technique investment material kneading apparatus of this embodiment, six types of courses (operation programs) can be stored in the course program storage unit 34 in advance. The operation program corresponding to each course can be set using the program key 3 1 b, the course selection key 3 1 c, and the shuttle dial 3 1 d.

FIG. 4 is a diagram showing a correspondence relationship between the rotation operation of the shuttle dial 31 d and the rotation operation of the stirring blade 24. The shuttle dial 3 1 d can be rotated about 90 ° in the clockwise and counterclockwise directions around the reference angular position (0 °). Each angle obtained by dividing the range into approximately 7 parts is the click position for the rotation operation. In Figure 4, the click position of the clockwise rotation operation is represented by “1” to “7”, and the click position of the counterclockwise rotation operation is represented by “_1” to Γ_7. The center click position, which is an angular position, is represented by “0”.

[0035] When the operation program is set, the rotation operation of the shuttle dial 3 1 d is linked to the rotation operation of the motor 1 8, that is, the stirring blade 2 4 under the control of the control unit 30. The click position on the dial 3 1 d corresponds to the rotation speed of the stirring blade 24, and the rotation operation direction of the shuttle dial 3 1 d corresponds to the rotation direction of the stirring blade 24. In this example, the maximum rotation speed of the stirring blades 2 4 is about 3 0 0 r pm, and each click position is determined to be approximately equal. Therefore, each time the shuttle dial 3 1 d is moved from the center click position to the left and right by one click, the rotational speed increases by 40 to 45 rpm. In this way, the rotation of the stirring blade 24 in real time can be adjusted only by rotating the shuttle dial 31d.

[0036] The procedure for setting the operation program will be described in detail later, but the operation program pattern is as shown in FIG. 5, for example. In this example, for example, for the first 5 seconds from the start of operation, the stirring blade 24 is rotated at about 43 rpm in the forward direction, and the stirring blade 24 is rotated at about 43 rpm in the reverse direction for the next 5 seconds. Is done. As described above, with the passage of time from the start of operation, the rotation speed and rotation direction of the stirring blades 24 are changed, and the time during which the same rotation speed and rotation direction are maintained is also appropriately changed. Actually, in order to prevent air entrainment in the initial stage of operation, pre-kneading is performed to rotate the stirring blades 24 at a relatively low speed, and the investment material powder is sufficiently mixed with water before the stirring blades 2 are mixed. Increase the rotational speed of 4 and execute full-scale kneading.

[0037] As described above, the operation program is composed of three parameters, that is, the rotation direction of the stirring blade 24, the rotation speed, and the time, and is assigned to the course selection key 3 1c "1" to "6" Is stored in the course program storage unit 34 in association with any one of the course numbers. Next, a description will be given of a standard kneading procedure and operation of the apparatus executed on the premise that the above operation program is stored in the course program storage unit 34 in advance. Figure 6 is a flow chart showing the procedure of the kneading work and the operation of the equipment.

[0038] First, the worker puts the investment material powder and water (or a dedicated liquid) in the stirring vessel 21 and attaches the lid 22. Then, the desired course selection key 3 1 c is pressed on the operation unit 31 to select the course (operation program), and then the start key 3 1 a is pressed (step S 1). Then, in response to this operation, the control unit 30 operates the vacuum pump 36 (step S 2), and drives the motor 18 via the motor drive unit 35 so that the drive shaft 15 rotates at a low speed. (Step S3). worker Hold the stirring vessel 21 in the hand and insert the fitting convex portion 2 5 at the upper end of the stirring shaft 2 3 protruding substantially vertically upward from the upper surface of the lid 2 2 to the container suction portion 1 3 of the main body 1 Drive shaft in the center 1 5 Lightly press to contact the fitting recess 1 7 at the bottom.

[0039] As described above, since the fitting convex portion 25 of the stirring container portion 2 and the fitting concave portion 17 of the main body portion 1 are hexagonal fittings, the upper end of the stirring shaft 2 3 is the drive shaft 15 At the time of contact with the lower end of the shaft, a maximum angular displacement of 60 ° occurs, but the drive shaft 15 rotates at a low speed, so that it reaches the rotational position where both fit together in a short time. As shown in FIG. 1, the fitting convex portion 25 is fitted into the fitting concave portion 17 and both are connected. Then, the upper surface of the lid 22 is brought into close contact with the lower surface of the container suction portion 13, and the intake chamber 14 is kept airtight by the O-ring 13 a. In this state, the inside of the stirring vessel 2 1 and the inside of the suction chamber 14 communicate with each other through the suction hole 26 formed in the lid 22, so the suction vessel 21 and the suction chamber are sucked by the suction force of the vacuum pump 36. The air in 1 4 is sucked through the intake pipe 19, and the air pressure in the stirring vessel 2 1 and the intake chamber 14 starts to drop. Since the drive shaft 15 and the stirring shaft 23 are connected, the stirring blade 24 starts to rotate at the same speed as the rotation speed of the drive shaft 15 but the speed is very low. No agitation action occurs.

[0040] The air pressure in the intake chamber 14 and the air pressure in the stirring vessel 21 are substantially the same. The control unit 30 reads the detection value P of the pressure sensor 33 that reflects the air pressure in the stirring vessel 21 and determines whether or not the detection value P is equal to or less than a predetermined threshold value P 1 ( Step S 4). This threshold value P 1 is a value such that even if the stirring container part 2 has the assumed maximum weight, it is adsorbed by the container adsorbing part 13 due to negative pressure and does not fall. When the control unit 30 determines that the pressure detection value P has become equal to or less than the threshold value P 1, the control unit 30 temporarily turns off the motor 18 to stop the low-speed rotation of the drive shaft 15 (step S 5).

[0041] Therefore, as described above, when the stirring shaft 23 is connected to the drive shaft 15, the driving force of the motor 18 is transmitted to the stirring blade 24 and the stirring blade 24 starts to rotate slowly. When the air pressure drops to such a level that the stirring vessel part 2 does not fall even if the operator releases his hand (when the vacuum level increases), the rotation of the stirring blade 24 once stops. Stirring vessel 2 1 Is transparent, and the rotation state of the stirring blades 24 can be easily visually confirmed by the operator, so that the operator can easily know when the hand may be released.

[0042] Since the degree of vacuum for kneading is insufficient even when the stirring vessel part 2 is adsorbed by negative pressure as described above, evacuation in the stirring vessel 21 continues. As a result, the air pressure in the stirring vessel 21 continues to drop further. The control unit 30 continues to read the pressure detection value P of the pressure sensor 33, and this time it determines whether or not this pressure detection value P has become lower than the threshold value P2, which is lower than the threshold value P1 (step S1). S 6). Normally, this threshold P 2 is set to a value close to the minimum air pressure that the vacuum pump 36 can achieve. When the detected pressure value P reaches the second threshold value P2, the control unit 30 determines that a sufficient degree of vacuum has been achieved and is associated with the first selected course. Start the kneading operation according to (Step S7).

That is, the control unit 30 reads the operation program (parameter) corresponding to the selected course from the course program storage unit 34, and controls the motor 18 via the motor driving unit 35 according to this. Rotate stirring blade 2 4 with. For example, according to the operation program as shown in FIG. 5, the stirring blade 24 is rotated for a predetermined time at a predetermined rotation speed and rotation direction.

[0044] At the start of operation, the control unit 30 determines whether any course selection key 31c is pressed (step S8). When the operation according to the operation program is executed, the operator does not press the course selection key 31c during the operation, so that it is determined as NO in step S8. When the operation according to the predetermined operation program is finished as it is (YES in step S12), for example, the buzzer sounds to alert the operator and the control unit 30 stops the motor 18 (step S1). 3). In this state, evacuation is continued, and when the operator presses the start key 31a, the control unit 30 stops the vacuum pump 36 (steps S14, S15). As a result, the evacuation is stopped, the negative pressure in the stirring container 21 is released, and the stirring container part 2 can be detached from the container suction part 13.

[0045] Normally, the worker visually confirms the kneading state as the above operation program progresses. However, a good kneading cannot always be achieved according to the set parameters. Therefore, if the operator determines that premixing, mixing, kneading, etc. are insufficient during operation, press one of the course selection keys 3 1 C. Then, YES is determined in step S8, and the process proceeds to step S9. The control unit 30 rotates at the rotation speed and rotation at the point when the pressing operation of the course selection key 31c is started (strictly before that). Temporarily stop driving program while maintaining direction. Next, it is determined whether or not the pressing operation of the course selection key 3 1 has been released (step S 10). If the pressing operation has not been released, the process returns to step S 9, and the pressing operation has not been released. If the course selection key 3 1 c is pressed, it will return immediately before the start of operation and resume execution of the operation program (step S 1 1)

[0046] Therefore, for example, if the operator presses the course selection key 3 1 c while the stirring blade 2 4 is rotating in the forward direction at 3 0 0 rpm, Γ 3 in the forward direction only during the pressed period. The rotational drive of the stirring blade 24 at 0 0 rpm will be extended. In this way, at any time point until the end of the operation, the rotational drive executed at that time point can be extended for an arbitrary time. As a result, even if the kneading operation according to the operation program alone is not sufficient, the kneading operation can be corrected during operation to achieve an appropriate kneading.

[0047] Although not shown in the flowchart of FIG. 6, when the operator presses the start key 31a during the operation, the control unit 30 receives this operation and terminates the operation being executed. Therefore, for example, when the operator determines that the kneading is sufficient during the operation, the operation can be forcibly terminated. Or, when it is found that there is a mistake in the kneading work, it is possible to avoid discontinuing the operation and continuing the useless operation.

[0048] Next, an operation procedure for setting the operation program and the operation of the corresponding device will be described. In this device, the operation program is set while the mud refining operation for the investment material to be kneaded is actually executed. Therefore, in the same manner as in the actual agitation work described above, the operator applies the investment material powder to be kneaded and water (or a dedicated liquid). Put the lid 2 2 in the stirring vessel 2 1, and vacuum-suck the stirring vessel part 2 to the container suction part 14 of the apparatus. When this operation program is set, the suction and vacuuming of the stirring vessel portion 2 shown in steps S2 to S6 are executed by pressing the program key 3 1 b instead of the start key 3 1 a.

[0049] When the stirring vessel 2 is adsorbed by the vessel adsorbing portion 14 and the air pressure in the vessel 21 is sufficiently reduced (corresponding to YES in step S6 in Fig. 6), for example, the buzzer sounds and the display 3 The operator is informed that the preparation is complete by illuminating the predetermined display in 2. From this point, when the operator rotates the shuttle dial 3 1 d described above, the control unit 30 recognizes the rotation operation direction and the operation amount (angle or click position), and the correspondence shown in FIG. Accordingly, the motor 18 is controlled via the motor drive unit 35. As a result, the stirring blade 24 begins to rotate, and the investment material contained in the stirring vessel 21 begins to be stirred.

[0050] The operator changes the operation amount, operation direction, and operation time of the shuttle dial 3 1 d as appropriate while visually confirming the state of stirring (kneading) of the investment material in the container 21. The stirring work is advanced. Changes in the rotation speed and rotation direction of the stirring blade 24 corresponding to changes in the operation amount and operation direction of the shuttle dial 3 1 d are parameterized in temporary memory such as RAM along with the elapsed time information from the start of operation. It will be remembered as a unit. The elapsed time from the start of operation is displayed on display section 32.

[0051] When the kneading work is completed as described above, and the operator wants to register the rotation speed and rotation direction pattern corresponding to the series of operations of the shuttle dial 3 1 d executed by the operator immediately before as an operation program. Operate the course selection key 3 1 c with the course number you want to register. Then, the parameters constituting the operation program temporarily stored in R A M are stored in the course program storage unit 34 in association with the course number. Of course, the data stored in the RAM can be deleted without executing the storage in the course program storage unit 34 by another operation.

[0052] In this way, the driving producers have different patterns for each of the six courses. Can be registered. When setting the above operation program, the operator only needs to turn the shuttle dial 3 1 d while confirming the actual kneading state, so the operator does not need to be particularly concerned about the rotational speed value. It is easy to operate and can be configured with few failures and mistakes.

In the kneading apparatus of the above embodiment, the shuttle dial 3 1 d is used to set the content of the operation program in the operation unit 3 1, but instead of the shuttle dial 3 1 d, a potentiometer ( It is possible to change to a configuration using a rotary type. FIG. 7 is a block diagram of the electrical system of the dental technique investing material kneading device according to this modification. The same components as those in the above embodiment are given the same reference numerals and the description thereof is omitted.

[0054] The rotary encoder constituting the shuttle dial 3 1 d is a digital switch. For example, a binary value output (output code) corresponding to the rotation angle is read by the control unit 30, and the rotation speed of the stirring blade is now read. Is derived. In contrast, the rotary potentiometer 3 1 e is an electrical component in which the electrical resistance value between the terminals changes in an analog fashion as the shaft rotates. Combined with the built-in (or separate) AZ D converter 3 0 1, it is configured to output a binary value corresponding to the rotation angle equivalent to the shuttle dial 3 1 d. That is, a predetermined DC voltage V ref is applied across the resistor of the potentiometer 3 1 e, and the partial pressure extracted from the sliding contact of the variable resistor is input to the AZ D converter 3 0 1 to obtain a digital value. Convert to

[0055] Now, suppose that the resolution of the AZ D converter 3 0 1 is 10 bits, and the operating angle range (effective electrical angle) of the shaft rotation of the potentiometer 3 1 e is 2 20 °. The relationship between the shaft angle position of potentiometer 3 1 e and the output value of AZ D converter 3 0 1 is as shown in FIG. That is, when the user turns the potentiometer 3 1 e axis in the operation angle range of 0 to 2 20 °, the output value of the AZ D converter 3 0 1 changes in the range of 0 to 1 0 23. Therefore, the position of this potentiometer 3 1 e axis operating angle 1 1 0 ° is the center of the shuttle dial 3 1 d. Determine the mounting position of potentiometer 3 1 e so that it is in one click position.

Further, in the control of the control unit 30, the correspondence relationship between the output value obtained by the AZ D converter 30 1 and the rotation operation of the stirring blade 24 is determined as shown in FIG. 8 (b). That is, when the axis of the potentiometer 3 1 e is at the center of the operating angle range (angle 110 °), there is a dead band (range in which the rotation speed is maintained at 0) with respect to both the left and right rotation directions. When the shaft is further rotated in the clockwise direction from there, the rotational speed of the stirring blade 24 gradually increases in the forward direction and reaches a maximum of 300 rpm. On the other hand, when the shaft is rotated counterclockwise, the rotation speed of the stirring blade 24 gradually increases in the reverse direction and reaches a maximum of 300 rpm. In this way, the same operability as that of the shuttle dial 3 1 d can be realized.

[0057] When the potentiometer 3 1 e is used, the change step width of the rotation speed of the stirring blade 2 4 can be made very small by increasing the resolution of the AZ D converter 3 0 1. This makes it possible to create a more precise driving program. In the example of Fig. 8 (b), the relationship between the AZ D output value and the rotation speed is linear, but by making it non-linear such as a quadratic function, for example, fine adjustment in a range where the rotation speed is low. May be made easier.

[0058] Further, the above-described embodiment is an example of the present invention, and it is obvious that modifications, changes, and additions are appropriately included in the scope of the present application within the scope of the present invention.

Claims

The scope of the claims

[1] Dental technique investing material that stirs the kneading material by rotating the stirring blade loaded in the container while evacuating the substantially sealable container containing the investing material material inside In the kneading machine,

a) operation means capable of rotating in both directions around a reference angular position; b) drive means for rotationally driving the stirring blade;

c) The rotation speed and the rotation drive direction of the stirring blade are associated with each other according to the rotation operation amount and the rotation operation direction from the reference angle position of the operation means, and the stirring blade is interlocked with the rotation operation of the operation means. Interlocking control means for controlling the drive means for rotating

An implanting material kneading apparatus for dental technician characterized by comprising:

[2] The operation means is a shuttle dial that outputs a pulse signal corresponding to a rotation operation angle from a reference angle position, and the interlock control means is a rotation operation angle and rotation from the reference angle position of the shuttle dial. 2. The implantable material kneading apparatus for dental technology according to claim 1, wherein control is performed in which the rotation speed and the rotation drive direction of the stirring blade are associated with each other in accordance with a moving operation direction.

[3] The operation means is a rotary type potentiometer, and the interlock control means reads a partial pressure taken from the movable electrode of the potentiometer, and rotates the amount of rotation from the reference angular position of the potentiometer shaft. 2. The dental material investment material kneading apparatus according to claim 1, wherein control is performed in association with a rotation speed and a rotation drive direction of the stirring blade in accordance with a rotation operation direction.

[4] The dental technician's embedding according to claim 1, comprising a plurality of course selection operation units, and each course being associated with parameters related to the rotational speed, the rotational drive direction, and the time of the stirring blade. Lumber kneading equipment.

[5] When the predetermined operation is performed at an arbitrary point in the course of reproducing a series of driving operations of the stirring blade, the operation control unit is configured to perform a rotation speed of the stirring blade executed at the time and 5. The dental material implanting material kneading apparatus according to claim 1, wherein the control is changed so as to control the driving means so as to maintain the rotational driving direction.