Blending device for oral impression material

Abstract

The invention relates to an oral impression material blending device which comprises a mounting support, a liquid storage tank, a pump and a driving motor are mounted on the mounting support, and a first connecting piece of a cylindrical structure is fixedly connected to an output shaft of the driving motor; the first connecting piece is rotationally sleeved with a second connecting piece, a sealed cavity is formed by the second connecting piece and the outer wall of the first connecting piece, and the second connecting piece is installed on the installation support. An inlet and an outlet of the pump are correspondingly communicated with the liquid storage tank and the sealed cavity through guide pipes; a water flow sensor is arranged on the guide pipe for communicating the outlet of the pump with the sealed cavity; the lower portion of the first connecting piece penetrates out of the lower end of the second connecting piece, and a plurality of connecting piece clamping blocks are arranged on the outer wall of the first connecting piece in the circumferential direction at intervals. A first connecting piece through hole is formed in the cylinder wall, corresponding to the sealing cavity, of the first connecting piece; and a control panel is also arranged on the mounting bracket. The device is compact in structure and convenient to use, the efficiency is improved, and the dosage of liquid added during film printing material blending can be accurately controlled.

Description

Technical Field

[0001] This invention relates to the field of dental impressions, and in particular to a mixing device for dental impression materials. Background Technology

[0002] When treating patients, dentists need to obtain dental models for orthodontic treatment, restorations, and other procedures. The process of obtaining these models is called dental impression taking, or simply taking a dental impression. Commonly used dental impression materials are alginate and plaster powder, which are inexpensive and stable, making them widely used in the dental industry. Currently, the method for taking impressions using these materials typically involves manual mixing. This manual process is time-consuming and susceptible to variations in operator skill, leading to uneven mixing, low efficiency, and difficulty in accurately controlling the water-to-impression ratio, resulting in a compromised material's performance. Summary of the Invention

[0003] To address the shortcomings of existing methods, this invention provides a mixing device for oral impression materials.

[0004] The technical solution adopted by this invention to solve its technical problem is as follows: a mixing device for oral impression materials, including a mounting bracket, on which a liquid storage tank, a pump, and a drive motor are mounted. A first connecting member with a cylindrical structure is fixedly connected to the output shaft of the drive motor. A second connecting member, which forms a sealed cavity with the outer wall of the first connecting member, is rotatably sleeved on the first connecting member. The second connecting member is mounted on the mounting bracket. The inlet and outlet of the pump are connected to the liquid storage tank and the sealed cavity respectively through conduits. A water flow sensor is provided on the conduit connecting the outlet of the pump to the sealed cavity. The lower part of the first connecting member extends from the lower end of the second connecting member and a plurality of connecting member blocks are arranged circumferentially on its outer wall. A first connecting member through hole is provided on the cylindrical wall of the first connecting member corresponding to the sealed cavity. A control panel electrically connected to the pump, the drive motor, and the water flow sensor is also provided on the mounting bracket.

[0005] Preferably, the second connector is provided with a connecting mechanism for connecting the mixing tank. The connecting mechanism is provided on the bottom surface of the second connector or on a bottom extension arm that extends downward from the bottom surface of the second connector along its bottom edge and around the second connector.

[0006] Preferably, the connecting mechanism is a connector slot provided on the bottom surface of the second connector or the inner wall of the bottom extension arm, and the second connector is provided with a micro switch electrically connected to the control panel, the button of the micro switch extending into the connector slot.

[0007] Preferably, the connector slot is formed by an L-shaped protrusion extending from the inner wall of the bottom surface or bottom extension arm of the second connector and the bottom surface of the second connector; two connector slots are arranged side by side at intervals, and a stop is provided on the inner wall of the bottom surface or bottom extension arm of the second connector in front of the entrance of each connector slot, the distance between the two stops and their corresponding connector slots is different, or two different stops are arranged at intervals on the inner wall of the bottom surface or bottom extension arm of the second connector in front of the entrance of any connector slot, the distance between the two stops and the connector slots of the adjacent stops is different from the distance between the two connector slots.

[0008] Preferably, the second connector includes a lower connector in the shape of a barrel, an intermediate connector in the shape of a cylinder connected to the top of the lower connector, a top cover covering the top of the intermediate connector, and a connecting cylinder in the shape of a cylinder extending from the outer wall of the intermediate connector and communicating with the interior of the intermediate connector. The connecting cylinder is mounted on a mounting bracket, the drive motor is mounted inside the intermediate connector, and the pump is mounted inside the connecting cylinder. The lower connector has a second connector through hole extending from the lower part of the first connector at the center of its inner bottom surface. The lower connector has a sleeve extending upward from its inner bottom surface, which surrounds the second connector through hole and is fitted around the upper part of the first connector, forming a sealed cavity between the upper outer wall of the first connector and the second connector.

[0009] Preferably, the upper part of the sleeve is sleeved on the output shaft of the drive motor. Both the upper and lower ends of the sleeve are provided with sleeve grooves that circumferentially surround the sleeve. Each sleeve groove is fitted with a sealing ring with an elastically deformable annular structure. On the opposing surfaces of the two sealing rings, coaxial inner and outer arms extend. The outer arms are fitted in the sleeve grooves. The surfaces of the inner arms facing the center of the sealing rings are wavy. A clamp is provided between each inner and outer arm and fitted on the inner arm.

[0010] Preferably, the system also includes a base, on which the mounting bracket is mounted. The base is provided with an inclined tray seat for placing the impression tray and a vibration motor for vibrating the tray seat. The control panel is located on the mounting bracket or the base.

[0011] Preferably, the base has a support frame extending upward from the top, and the support frame is pivotally connected to an upwardly inclined third connector at its upper limit. The tray seat is detachably connected to the end of the third connector away from the support frame, and the vibration motor is installed at the bottom of the tray seat.

[0012] Preferably, the support frame is a horizontally placed U-shaped support frame extending upward from the top of the base. A first rotating shaft is provided on the side of the support frame near the center. A support frame slot with a height higher than the height of the first rotating shaft is provided on the inner wall of the support frame near the opening. One end of the third connector is sleeved on the first rotating shaft, and the other end extends out to form a connector extension arm that can engage with the support frame slot. A first shock-absorbing sleeve is provided between the third connector and the first rotating shaft. A second shock-absorbing sleeve is sleeved on the connector extension arm. The tray seat is detachably connected to the end of the third connector with the connector extension arm.

[0013] Preferably, the top of the liquid storage tank is provided with a liquid storage tank slot, and a U-shaped elastic pressing handle is provided in the liquid storage tank slot. A top locking block extends from the surface of the pressing handle away from the liquid storage tank slot, and the bottom surface of the top plate is provided with a top plate slot that can match and engage with the top plate locking block.

[0014] The beneficial effects of this invention are as follows: This invention utilizes a drive motor to achieve automated stirring and blending. The stirring speed, pressure, and stirring time can be easily adjusted through the drive motor, improving stirring efficiency and uniformity. At the same time, the amount of water used during blending can be precisely controlled by using a pump and a water flow sensor. The first connecting piece is connected to the output shaft of the drive motor. The first connecting piece can be used as a coupling to connect the stirring blades and as a water injection pipe during stirring, reducing the number of components and making the structure of the blending device more compact. Since the first connecting piece is coaxial with the output shaft of the drive motor, the water flow can enter the center of the mixing tank along the rotation center, and then, under the action of the stirring blades, it can be better mixed with all the molding materials, resulting in more uniform mixing. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of an embodiment of the present invention;

[0016] Figure 2 This is a schematic diagram of the cross-sectional structure along the front-rear direction of the second connector in an embodiment of the present invention;

[0017] Figure 3 This is an embodiment of the present invention. Figure 2 A magnified structural diagram of A in the middle;

[0018] Figure 4 This is a schematic diagram of the cross-sectional structure of the liquid storage tank along the left-right direction according to an embodiment of the present invention;

[0019] Figure 5 This is an embodiment of the present invention. Figure 4 A magnified structural diagram of B in the diagram;

[0020] Figure 6This is a schematic diagram of the internal connection structure of the second connector in an embodiment of the present invention;

[0021] Figure 7 This is a schematic diagram of the structure of the first connector in an embodiment of the present invention;

[0022] Figure 8 This is a schematic diagram of the top surface of the lower connector in the first embodiment of the present invention;

[0023] Figure 9 This is a schematic diagram of the bottom surface of the lower connector in the first embodiment of the present invention;

[0024] Figure 10 This is a schematic diagram of the bottom surface of the lower connector in the second embodiment of the present invention;

[0025] Figure 11 This is a schematic diagram of the structure of the liquid storage tank according to an embodiment of the present invention;

[0026] Figure 12 This is a schematic diagram of the structure of the present invention, which is connected to a stirring tank and has a pressing handle extending out of the storage tank slot;

[0027] Figure 13 This is the main circuit diagram of the control panel of this invention;

[0028] Figures 14-20 This is a circuit diagram of different branches of the control panel of this invention;

[0029] Figure 21 This is an exploded structural diagram of the mixing tank with double shaftless helical blades according to an embodiment of the present invention;

[0030] Figure 22 This is a schematic diagram of the structure of a single shaftless helical blade according to an embodiment of the present invention;

[0031] Figure 23 This is a schematic diagram of the structure of the first top cover with a material bucket clamping block provided in an embodiment of the present invention;

[0032] Component names and serial numbers in the diagram: 1-Mounting bracket; 10-Control panel; 11-Base; 110-Tray seat; 111-Vibration motor; 112-Support frame; 1120-Support frame slot; 113-Third connector; 114-First rotating shaft; 115-Second shock absorber sleeve; 12-Mounting plate; 120-Observation window; 13-Top plate; 130-Top plate slot; 2-Liquid tank; 20-Liquid tank slot; 21-Press handle; 210-Top locking block; 3-Pump; 30-Conduit; 31-Water flow sensor; 4-Drive motor; 40-Output shaft; 5-First connector; 50-Connector locking block; 51-First connector through hole; 6-Second connector; 60-Bottom extension arm; 600-First connector locking block. 601 - Second connecting piece slot; 602 - First stop block; 603 - Second stop block; 604 - Support block; 61 - Micro switch; 62 - Lower connecting piece; 620 - Second connecting piece through hole; 621 - Sleeve; 6210 - Sleeve slot; 63 - Intermediate connecting piece; 64 - Top cover; 65 - Connecting cylinder; 7 - Sealing ring; 70 - Inner arm; 71 - Outer arm; 72 - Clamp; 8 - Mixing bucket; 80 - Cylinder body; 81 - First top cover; 810 - Top cover through hole; 82 - Bottom plate; 820 - Cylinder; 83 - Shaftless spiral blade; 830 - Lower extension arm; 8300 - First stop block; 831 - Collar; 832 - Upper extension arm; 84 - Rotating piece; 840 - Protrusion; 841 - Notch; 85 - Bucket block. Detailed Implementation

[0033] The present invention will be further described below with reference to embodiments, providing a clear and complete description. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the invention. The implementation conditions used in the embodiments may be further adjusted according to the specific manufacturer's conditions, and the implementation conditions not specified are generally those in conventional experiments. Furthermore, the directional terms mentioned in the present invention, such as "up," "down," "front," "back," "left," "right," "inner," and "outer," are only for reference to the directions in the accompanying illustrations. The use of directional terms is for better and clearer explanation and understanding of the present invention, and is not intended to indicate or imply any necessary orientation of the present invention; therefore, they should not be construed as limitations on the present invention.

[0034] Examples of embodiments of the present invention Figures 1 to 12As shown, a device for mixing oral impression material includes a mounting bracket 1, on which a liquid storage tank 2, a pump 3, and a drive motor 4 are mounted. The liquid storage tank 2 is used to hold water for mixing the impression material and has a water inlet. The water inlet is covered with a detachable water inlet cap, which is detachably mounted on the mounting bracket 1 for easy water filling into the liquid storage tank 2. The pump 3 is a diaphragm pump and works in conjunction with a water flow sensor 31 to control the amount and flow rate of water used when mixing the impression material. The drive motor 4 is used to drive the rotation of a first connecting member 5, which in turn drives the stirring blade connected to it to rotate. At this time, a base 11 is set at the bottom of the mounting bracket 1, and the mounting bracket 1 is installed on the base 11. The mounting bracket 1 includes two mounting plates 12 arranged side by side on the base 11 in the vertical direction and a top plate 13 installed on the top of the two mounting plates 12. The liquid storage tank 2 is detachably installed between the two mounting plates 12. The two mounting plates 12 are arranged side by side on the base 11 with a gap between them, and the top plate 13 is installed on the top of the two mounting plates 12. In this way, a space is formed between the two mounting plates 12 and the top plate 13, and the liquid storage tank 2 is installed in this space. Regarding the detachable design of the liquid storage tank 2, a liquid storage tank slot 20 is provided on the top of the liquid storage tank 2. A U-shaped, elastic pressing handle 21 is installed within the liquid storage tank slot 20. A top locking block 210 extends from the end of the pressing handle 21 away from the liquid storage tank slot 20. A top plate slot 130 is provided on the bottom surface of the top plate 13, which can match and engage with the top plate locking block 210. For example, if the liquid storage tank slot 20 is located at the right edge of the top of the liquid storage tank 2, the opening of the U-shaped structure of the pressing handle 21 faces to the right. One end of the U-shaped structure of the pressing handle 21 is a fixed end installed within the liquid storage tank slot 20, and a through hole can be provided at this end for liquid storage. The bottom of the tank slot 20 is provided with a threaded hole, and then the end is fixed in the tank slot 20 with screws. The other end is a movable end that can move up and down relative to the tank slot 20. At this time, there are two situations between the movable end and the tank slot 20. One is that the right end of the movable end extends out from the right end of the tank slot 20. The other is that the right end of the movable end does not extend out of the tank slot 20. Instead, a notch is provided on the right end of the top plate 13 so that the right end of the movable end is exposed for easy pressing. A top locking block 210 is provided on the top of the movable end. The left side surface of the top locking block 210 is a guide slope to facilitate the top locking block 210 to be inserted into the top plate slot 130.

[0035] When installing the liquid storage tank 2, first install the pressing handle 21 in the liquid storage tank slot 20 to form an integral structure with the liquid storage tank 2, with the movable end at the top. Then press the movable end down and insert the liquid storage tank 2 between the two mounting plates 12. After that, release the press, the movable end will spring back, and the top locking block 210 will lock into the top plate slot 130 to position the liquid storage tank 2. At this time, in order to facilitate observation of the water level in the liquid storage tank 2, the liquid storage tank 2 is made of a transparent body. At the same time, scale lines can be set on the liquid storage tank 2, and an observation window 120 can be set on any of the mounting plates 12. When scale lines are set on the liquid storage tank 2, the observation window 120 is set at the position corresponding to the scale lines. Preferably, the observation window 120 is set on the front mounting plate 12. Meanwhile, an inclined tray seat 110 for placing the impression tray and a vibration motor 111 for vibrating the tray seat 110 are provided on the base 11. The impression tray can be placed on the tray seat 110 after being filled with impression material. Then, the vibration of the vibration motor 111 makes the impression material more evenly distributed on the impression tray.

[0036] Regarding the arrangement of the tray seat 110 on the base 11, a support frame 112 extends upward from the top of the base 11. The support frame 112 is pivotally connected to an upwardly inclined third connector 113 at its upper limit. The tray seat 110 is detachably connected to the end of the third connector 113 away from the support frame 112. The vibration motor 111 is installed at the bottom of the tray seat 110. At this time, a bottom shell is provided on the bottom surface of the tray seat 110 to form an accommodating cavity with the bottom surface of the tray seat 111. The vibration motor 111 is installed in the bottom shell. The support frame 112 is a horizontally placed U-shaped support frame extending upward from the top of the base 11. The support frame 112 is horizontally installed on the top of the base 11, with the opening of the U-shaped structure facing rearward. A first rotating shaft 114 is provided near the center side of the support frame 112, meaning the first rotating shaft 114 is located at the bottom of the U-shaped structure of the support frame 112. Support frame slots 1120, higher than the height of the first rotating shaft 114, are provided on the inner wall of the support frame 112 near the opening. One end of the third connecting member 113 is fitted onto the first rotating shaft 114, and the other end extends into a connecting member extension arm (not shown in the figure) that can engage with the support frame slot 1120. Preferably, support frame slots 1120 are provided on both inner walls of the support frame 112 near the opening, and two connecting member extension arms are correspondingly provided, ensuring the stability of the tray seat 110 mounted on the base 11. This pivotally connects the third connecting member 113 to the support frame 112. Position 1120 is higher than the first rotating shaft 114, causing the third connecting member 113 to be tilted with its front lower than its rear. The third connecting member 113 can then rotate relative to the support frame 112 via the first rotating shaft 114. When the third connecting member 113 rotates downwards, its extension arm abuts against the bottom of the support frame slot 1120 and is blocked, preventing further downward rotation. However, the opening of the support frame slot 1120 does not obstruct the upward rotation of the third connecting member 113. The third connecting member 113 can rotate up and down with the vibration of the tray seat 110. A first damping sleeve (not shown in the figure) is provided between the third connecting member 113 and the first rotating shaft 114. A second damping sleeve 115 is fitted on the connecting member extension arm. Both damping sleeves are made of rubber. The damping sleeves reduce the impact of the tray seat 110 on the base 11 when it is vibrated. The tray seat 110 can be detachably connected to the end of the third connecting member 113 where the connecting member extension arm is located, that is, the higher side of the third connecting member 113. At this time, the tray seat 110 and the third connecting member 113 are disassembled and assembled by snap-fit. That is, a snap-fit ​​groove for snap-fit ​​is provided at the end of the third connecting member 113 away from the first rotating shaft 114. A protrusion that can match and snap into the snap-fit ​​groove is provided on the tray seat 110 or on the bottom shell for mounting the vibration motor 111.At this point, the tray base 110 can be set in a Y-shape, with two clamping arms extending upwards from the tail edge to fix the impression tray. The shape of the tray base 110 matches the shape of the oral impression tray, making the oral impression tray placed on the tray base 110 more stable during vibration and preventing it from falling off the tray base 110. A collection groove is set on the base 11 corresponding to the lower part of the tray base 110 to collect the impression material that falls from the oral impression tray during the vibration of the tray base 110. The control panel 10 is set on the mounting bracket 1 or the base 11 according to different needs. Then, the control panel 10 is electrically connected to the drive motor 4, pump 3, water flow sensor 31, and vibration motor 111 through wires. The circuit structure of the control panel 10 is as follows. Figures 13 to 20 As shown in the image.

[0037] A cylindrical first connecting member 5 is fixedly connected to the output shaft 40 of the drive motor 4. The first connecting member 5 acts as a coupling, with one end fixedly connected to the output shaft of the drive motor 5 and the other end extending out from the bottom of the second connecting member 6 to connect the stirring blades. Its cylindrical structure facilitates water flow from its interior. For the connection between the first connecting member 5 and the output shaft 40 of the drive motor 4, a rounded rectangular countersunk hole coaxial with the first connecting member 5 is provided at the top. The output shaft 40 of the drive motor 4 is fitted into the countersunk hole, sealing the top of the first connecting member 5. The first connecting member 5 is then connected to the output shaft 40 of the drive motor 4. The first connecting member 5 can... The coupling serves as a connection to the external stirring blades and also as a water injection pipe during stirring, reducing the number of components and making the mixing device more compact. A second connecting member 6, forming a sealed cavity with the outer wall of the first connecting member 5, is rotatably sleeved on the first connecting member 5. The second connecting member 6 is mounted on the mounting bracket 1. The inlet and outlet of the pump 3 are connected to the storage tank 2 and the sealed cavity respectively via conduits 30. A water flow sensor 31 is installed on the conduit 30 connecting the outlet of the pump 3 to the sealed cavity. The connection between the inlet of the pump 3 and the storage tank 2 can be achieved by connecting the inlet to the conduit 30. A detachable water pipe connector consisting of male and female fittings is installed between the conduit 30 and the storage tank 2. The outlet of the pump 3 connects to the sealed cavity... The connection can be achieved by directly connecting the two via the conduit 30, or by setting a pipe on the second connector 6 that communicates with the sealed cavity, setting an interface on the pipe, and then setting a connector on the conduit 30 that matches and connects to the interface; the lower part of the first connector 5 extends out from the lower end of the second connector 6 and has multiple connector blocks 50 spaced circumferentially on its outer wall. The second connector 6 has an internal cavity, and the first connector 5 is sealed and installed in the internal cavity of the second connector 6. At the same time, the lower part of the first connector 5 extends out from the lower end of the second connector 6, which means that the lower end of the second connector 6 has a through hole through which the first connector 5 passes. The first connector 5 is sealed to the second connector 6 to form a sealed cavity. The first connector 5 can also rotate relative to the second connector 6. The second connector 6 is fixedly installed on the mounting bracket 1, which avoids the second connector 6 from rotating with the first connector 5. At the same time, a connector block 50 is provided on the outer wall of the part of the first connector 5 that protrudes from the second connector 6. The first connector 5 uses the connector block 50 to engage with the external stirring blade. The external stirring blade has a hollow connecting shaft at its axis. The inner wall of the connecting shaft is provided with a groove that matches and engages with the connector block 50. The lower part of the connector block 50 is designed as a conical structure, which is conducive to its engagement with the external stirring blade.The first connector 5 has a through hole 51 on the wall of the sealed cavity. Water enters the sealed cavity from the storage tank 2 through the pump 3. During this process, the pump 3 and the water flow sensor 31 can accurately control the amount of water used for mixing. Water then flows into the interior of the first connector 5 through the through hole 51 and flows out from the interior. The first connector 5 is coaxial with the output shaft 40 of the drive motor 4, which allows the water to enter the center of the mixing tank along the rotation center during mixing. Under the action of the mixing blades, the water can be better mixed with all the molding materials, resulting in a more uniform mixture. The mounting bracket 1 is also equipped with a control panel 10 electrically connected to the pump 3, the drive motor 4, and the water flow sensor 31. The control panel 10 contains an MCU unit, which processes the information from the water flow sensor 31 and controls the operation of the pump 3 and the drive motor 4.

[0038] For the stirring blades connected to the first connecting member 5, the stirring blades are arranged in the mixing tank 8, such as... Figures 21 to 23As shown, the mixing tank 8 includes a cylindrical body 80, a first top cover 81 disposed at the upper end of the cylinder 80, a bottom plate 82 disposed at the lower end of the cylinder 80, and a retractable shaftless helical blade 83 disposed inside the cylinder 80. The cylinder 80 adopts a cylindrical structure. The center of the first top cover 81 is provided with a top cover through hole 810 coaxial with the shaftless helical blade 83. The first top cover 81 or the bottom plate 82 is sealed inside the cylinder 80 and can slide along the axial direction of the cylinder 80. In one case, the first top cover 81 is sealed inside the cylinder 80 and slides inside the cylinder 80, and the bottom plate 82 is integrally formed with the cylinder 80; in another case, the first top cover 81 and the bottom plate 82 are integrally formed with the cylinder 80. The cylinder 80 is integrally formed, and the bottom plate 82 is sealed and slidable inside the cylinder 80. In this way, a mixing cavity with a top cover through hole 810 is formed between the bottom plate 82, the inner wall of the cylinder 80, and the first top cover 81. As the first top cover 81 or the bottom plate 82 slides in the cylinder 80, the volume of the mixing cavity decreases, and the material in the mixing cavity can be discharged from the top cover through hole 810. The sealing of the first top cover 81 or the bottom plate 82 in the cylinder 80 can be achieved by setting a side wall groove around the side wall of the first top cover 81 or the bottom plate 82, and fitting a sealing ring that partially protrudes from the side wall groove into the side wall groove, or by using a liquid seal.When the base plate 82 slides inside the cylinder 80, a bottom groove is provided on the bottom surface of the base plate 82. A pushing device that can be matched and inserted into the bottom groove can be used to push the base plate 82 to slide inside the cylinder 80. The shaftless spiral blade 83 extends and retracts in a manner similar to a telescopic spring. The shaftless spiral blade 83 can have one or more blades. When the first top cover 81 or the base plate 82 slides inside the cylinder 80, a force is applied to the shaftless spiral blade 83, and the shaftless spiral blade 83 is compressed accordingly. When the shaftless spiral blade 83 is compressed to its minimum, it forms a ring structure. The outer diameter of the shaftless spiral blade 83 is slightly smaller than the inner diameter of the cylinder 80, that is, there is a small gap between it and the inner wall of the cylinder 80. This allows the shaftless spiral blade 83 to stir the molding material inside the cylinder 80 radially during rotation, without causing the molding material to accumulate in the cylinder 80. Its pitch is similar to that of the base plate 82 and the first top cover 81. The spacing between the covers 81 is matched. The lower end of the shaftless spiral blade 83 is pivotally connected to the top surface of the base plate 82. The upper end of the shaftless spiral blade 83 is provided with a rotating part 84 with a circular structure. The rotating part 84 is matched and rotatably installed in the through hole 810 of the top cover. The lower part of the first connecting part 5 is connected to the rotating part 84 in the ring of the rotating part 84. The rotating part 84 and the shaftless spiral blade 83 are integrally formed. The rotating part 84 is matched and installed in the through hole 810 of the top cover and can rotate in the through hole 810 of the top cover. The shaftless spiral blade 83 is located between the base plate 82 and the first top cover 81 and rotates in the cylinder 80. In this way, the material bucket and the stirring blade are combined together. The shaftless spiral blade 83 can make the molding material rise upward under the action of the shaftless spiral blade 83 and be pressed downward along the cylinder 80 to form an 8-shaped pressing method to mix the molding material. The mixing is more uniform and there will be no accumulation at the axis. The lower part of the mixing tank is the bottom plate 82. The top cover through hole 810 is sealed by the rotating component 84 and the first connecting component 5 connected to the rotating component 84, avoiding material exposure and dust pollution. The top cover through hole 810 can be set as a countersunk through hole; a countersunk through hole is a through hole with an upper diameter larger than a lower diameter, forming a step between the upper and lower parts. The countersunk through hole and the cylinder 80 are coaxial. For example, the top surface of the first top cover 81 can be set as a concave spherical top surface. A column perpendicular to the top surface of the first top cover 81 extends upward from the center of the first top cover 81. A countersunk through hole penetrating the top surface of the column and the bottom surface of the first top cover 81 is set at the center of the column, giving the countersunk through hole a certain length, thus making the connection structure between the shaftless spiral blade 83 and the first top cover 81 more stable. At this time, the outer wall of the rotating component 84 can extend and abut against the extended arm of the step surface inside the countersunk through hole.In use, a fixed amount of molding material can be pre-loaded into the cylinder 80 of the mixing tank 8 for later use. The mixing tank can be produced by injection molding. The alginate molding material and gypsum powder are pre-quantified and packaged into different mixing tanks 8 according to the material requirements for use, so that they become standard products and the amount of material used is standardized. Different shaped clips are set on the edge of the mixing tank 8 to distinguish the different packaged materials. In use, the mixing tank 8 is installed on the second connector 6. In use, the mixing tank 8 is first installed on the bottom surface of the second connector 6. At this time, the part of the first connector 5 that protrudes from the second connector 6 extends into the mixing tank 8 and connects with the rotating part 84 on the shaftless spiral blade 83. When it is necessary to mix the molding material, the pump 3 is used to draw water from the storage tank 2 and inject it into the sealed cavity. Then the water enters the interior of the first connector 5 through the through hole 51 of the first connector, and then flows into the mixing tank 8 through the interior of the first connector 5. The drive motor 4 rotates at the corresponding time and speed, driving the shaftless spiral blade 83 to rotate and mix inside the cylinder 80. The shaftless spiral blade 83 is designed to mimic the manual figure-eight cyclic wiping and pressing mixing method, and achieves full mixing of the molding material by rotating and pressing. After mixing, the mixing tank 8 is removed, and then the mixed material is pushed out of the cylinder 80 and coated into the molding tray through the bottom plate 82 of the mixing tank 8. The operation of pump 3 and drive motor 4 can be controlled by control panel 10. The stirring speed and stirring time can be easily adjusted by driving motor 4. The amount of liquid entering the mixing tank 8 can be controlled by pump 3. The time is short, which improves the stirring efficiency and uniformity. No operating experience is required to use it. Further improvements include a lower extension arm 830 extending from the lower end of the shaftless spiral blade 83 towards the axis, and a collar 831 extending from the end of the lower extension arm 830 away from the shaftless spiral blade 83. A cylinder 820 perpendicular to the top surface of the base plate 82 is provided at the center of the top surface of the base plate 82, and the collar 831 is fitted onto the cylinder 820 and can rotate relative to the cylinder 820. An upper extension arm 832 extends from the upper end of the shaftless spiral blade 83 towards the axis, and a rotating component 84 is provided at the end of the upper extension arm 832 away from the shaftless spiral blade 83. The collar 831 and the rotating component 84 are coaxial. The upper extension arm 832 shears the mold material stirred above and presses it downward back into the cylinder 80. When a single shaftless spiral blade 83 is provided, the upper extension arm 832 and the lower extension arm 830 are in a perpendicular state. Meanwhile, a first stop 8300 extends perpendicularly to the top surface of the lower extension arm 830. The first stop 8300 pushes the impression material on the top surface of the base plate 82 during the rotation of the shaftless spiral blade 83, causing the impression material to be lifted up, so that it does not accumulate on the top surface of the base plate 82, which is more conducive to stirring and mixing, and the mixing is more uniform.The first stop 8300 is a strip-shaped stop with its long side perpendicular to the axis of the shaftless spiral blade 83. The side wall of the first stop 8300 along its long side is an arc-shaped side wall with its axis perpendicular to the axis of the shaftless spiral blade 83. When the impression material encounters the stop during rotation, it will flow downward along the arc-shaped side wall and change direction to reduce the resistance to rotation. Multiple protrusions 840 are spaced apart on the inner wall of the rotating part 84. Two adjacent protrusions 840 form a slot. The inner wall of the rotating part 84 between two adjacent protrusions 840 is provided with an upward-facing notch 841, or the top surface of the rotating part 84 corresponding to each protrusion 840 is provided with an upward-facing notch 841. This forms an elastic locking structure, which facilitates the connection between the rotating part 84 and the first connecting part 5. The connecting part locking block 50 provided on the lower part of the outer wall of the first connecting part 5 matches and locks between two adjacent protrusions 840. The lower part of the connecting part locking block 50 is set with a conical structure to facilitate the locking of the connecting part locking block 50. At this time, the opposite surfaces of two adjacent protrusions 840 can also be set as concave arc surfaces to make the locked structure more secure. Preferably, two shaftless helical blades 83 are provided, symmetrically arranged inside the cylinder 80, which is more conducive to the figure-eight pressing of the impression material. The lower ends of the two shaftless helical blades 83 are radially symmetrically pivoted to the base plate 82, and the upper ends of the two shaftless helical blades 83 are radially symmetrically connected to the rotating member 84. When the lower end of the shaftless helical blade 83 extends with a lower extension arm 830 and the upper end extends with an upper extension arm 832, the two lower extension arms 830 are radially symmetrically arranged on the outer wall of the collar 831, and the two upper extension arms 832 are radially symmetrically arranged on the lower part of the outer wall of the rotating member 84. The two lower extension arms 830 and the two upper extension arms 832 form an interlaced structure, which is more conducive to the pressing, stirring and mixing of the impression material.

[0039] Further improvements, such as Figure 1 , Figure 2 , Figure 6 , Figures 8 to 12As shown, the second connector 6 is provided with a connecting mechanism for connecting the mixing tank. The connecting mechanism is located on the bottom surface of the second connector 6 or on a bottom extension arm 60 extending downward from the bottom edge of the second connector 6 around the second connector 6. The bottom extension arm 60 forms a ring structure, allowing the external mixing tank to be connected to the bottom of the second connector 6 via the connecting mechanism. This enables the molding material to be mixed in a closed environment, avoiding material waste. The connecting mechanism is a connector slot located on the bottom surface of the second connector 6 or on the inner wall of the bottom extension arm 60. The second connector 6 is provided with a micro switch 61 electrically connected to the control panel 10, and the button of the micro switch 61 extends into the connector slot. The external mixing tank is equipped with a locking block that matches the slot of the connector. When the external mixing tank is not fully engaged in the slot of the connector, that is, when the button of the micro switch 61 is not pressed, the drive motor 4 cannot start, ensuring safety during use. One type is a tank locking block 85 extending from the top edge of the cylinder 80 or the edge of the first top cover 81. Multiple tank locking blocks 85 are evenly spaced along their respective circumferences at the top of the cylinder 80 or the edge of the first top cover 81, such as two, three, or four tank locking blocks 85. The structure is simple and easy to use. Another type is a tank locking block 85 extending upward from the top surface of the first top cover 81. The tank locking block 85 has an inverted L-shaped structure, and multiple blocks are also evenly spaced along the circumference of the first top cover 81, such as two or three.

[0040] As for the connector slot, the connector slot is formed by an L-shaped protrusion extending from the inner wall of the bottom surface or bottom surface extension arm 60 of the second connector 6 and the bottom surface of the second connector 6. The L-shaped protrusion is arranged circumferentially along the bottom surface or bottom surface extension arm 60 of the second connector 6, forming the entrance of the connector slot in a clockwise or counterclockwise direction. Two connector slots are arranged side by side at intervals in a clockwise or counterclockwise direction, and the entrances of the two connector slots face the same direction. At this time, two microswitches 61 are also provided, and the button of a microswitch 61 is inserted into each of the two connector slots. In this case, the second On the bottom surface of connector 6 or the inner wall of the bottom extension arm 60, a stop block is provided in front of the inlet corresponding to each connector slot. The stop block and the second connector 6 are integrally formed. The distance between the two stop blocks and their corresponding connector slots is different, and the two stop blocks and the two connector slots are located on the same circumference of the bottom surface of the second connector 6 or at the same height on the bottom extension arm 60. This allows different molding materials to be loaded into different mixing buckets according to the different molding materials to be mixed. Then, the mixing buckets are engaged in different connector slots to identify the molding material to be mixed. In practical applications, such as... Figure 9As shown, in the diagram, the two connector slots are designated as follows based on the inlet direction: the one at the front is called the first connector slot 600, and the one at the rear is called the second connector slot 601. The stop in front of the first connector slot 600 is called the first stop block 602; the stop in front of the second connector slot 601 is called the second stop block 603. The distance between the first stop block 602 and the first connector slot 600 is greater than the distance between the second stop block 603 and the second connector slot 601, but less than the distance between the first connector slot 600 and the second connector slot 601. This allows for... Different sized and shaped locking blocks are installed on the connecting mixing tank to match the spacing between the stop block 602 and the first connecting slot 600. Corresponding to the first stop block 602 and the first connecting slot 600, the locking blocks on the external mixing tank are designed to match the spacing between them. The length of the first locking block matches the spacing between the first stop block 602 and the first connecting slot 600. Similarly, for the second stop block 603 and the second connecting slot 601, the locking blocks on the external mixing tank are designed to match the spacing between the first connecting slot 601 and the second connecting slot 601. The material barrel clamp has a U-shaped notch on its outer edge. The opening width of the U-shaped notch matches the second stop 603, which then engages with the U-shaped notch. This prevents the first clamp from engaging between the second stop 603 and the second connector slot 601 when using an external mixing barrel. Similarly, the material barrel clamp cannot engage between the first stop 602 and the first connector slot 600. Therefore, different mold-making materials can be distinguished by using different clamps on the external mixing barrel and engaging in different connector slots for mixing, thus avoiding misuse. Along the radial direction of the bottom extension arm 60, support blocks 604 corresponding to the connector slots and stops are provided on the inner wall of the bottom extension arm 60 to ensure stability when the external mixing tank is connected to the bottom extension arm 60. The support blocks 604 and the connector slots are at the same height on the bottom extension arm 60. Two support blocks 604 are provided, and they and the first connector slot 600 equally divide the circumference of the bottom extension arm 60. Two first stops 602 are provided, and they and the second connector slot 601 equally divide the circumference of the bottom extension arm 60. Three second stops 603 are provided, and they equally divide the circumference of the bottom extension arm 60. Another case is, as Figure 10As shown, on the bottom surface of the second connector 6 or the inner wall of the bottom surface extension arm 60, two different blocks are spaced apart in front of the entrance of any connector slot. The distance between the two blocks and the connector slots of the adjacent blocks is different from the distance between the two connector slots. The two blocks are set in front of the entrance of one connector slot. The block 601 adjacent to the connector slot is called the first block 602, and the other block is called the second block 603. The other connector slot is set on the side of the first connector slot away from the first block 602. The connector slot adjacent to the first block 602 is called the first connector slot 600, and the connector slot away from the first block 602 is called the second connector slot 601. The distance between the component slot 600 and the second connector slot 601 is greater than the distance between the first stop block 602 and the first connector slot 600, but less than the distance between the second stop block 603 and the first connector slot 600. The external mixing tank is provided with a first locking block that can only be locked between the first connector slot 600 and the second connector slot 601, or a tank locking block that can only be locked between the second stop block 603 and the first connector slot 600. At the same time, a U-shaped notch is provided on the outer edge of the locking block to allow the first stop block 602 to match and lock in. At this time, a support block 604 corresponding to the connector slot and the stop block is provided on the bottom surface of the second connector 6 radially along the bottom surface of the second connector 6 to ensure the stability of the external mixing tank when connected to the second connector 6.

[0041] Further improvements, such as Figure 1 , Figure 2 , Figure 6 , Figures 8 to 12As shown, the second connector 6 includes a lower connector 62 in the shape of a barrel, an intermediate connector 63 in the shape of a cylinder connected to the top of the lower connector 62, a top cover 64 covering the top of the intermediate connector 63, and a connecting cylinder 65 in the shape of a cylinder extending from the outer wall of the intermediate connector 63 and communicating with the interior of the intermediate connector 63. That is, the second connector 6 is the top cover 64, the intermediate connector 63 and the lower connector 62 connected sequentially from top to bottom. They can be connected by snap-fit ​​or threaded connection, or the lower connector 62 and the intermediate connector 63 can be integrally formed. The side wall of the intermediate connector 63 is provided with a through hole, and the connecting cylinder 65 extends around the through hole on its outer wall. The connecting cylinder 65 is installed on the mounting bracket 1, and the second connector 6 is installed on the mounting bracket 1 through the connecting cylinder 65. In this way, a space is formed between the connecting cylinder 65, the intermediate connector 63 and the lower connector 62. The drive motor 4 is installed in the intermediate connector 63 and the pump 3 is installed in the connecting cylinder 65.The lower connector 62 has a second connector through hole 620 at the center of its inner bottom surface, which protrudes from the lower part of the first connector 5. A sleeve 621 extends upward from the inner bottom surface of the lower connector 62, surrounding the second connector through hole 620 and fitted onto the upper part of the first connector 5, forming a sealed cavity between the sleeve 621 and the upper outer wall of the first connector 5. The sleeve 621 and the lower connector 62 form an annular structure with a ring-shaped groove at the top. A mounting post extends upward from the bottom of the annular groove. The drive motor 4 is then mounted on the top of the mounting post using screws and is positioned inside the intermediate connector 63. The output shaft 40 of the drive motor 4 is coaxial with the second connector through hole 620, and the output shaft 40 also partially extends into the sleeve 621. A sealing arrangement is provided between the sleeve 621 and the inner wall of the sleeve 621, and between the hole wall of the second connecting member through hole 620 and the first connecting member 2. For the sealing structure, the upper part of the sleeve 621 is sleeved on the output shaft 40 of the drive motor 4. Both the upper and lower ends of the sleeve 621 are provided with a sleeve groove 6210 that surrounds the sleeve 621 circumferentially. The sleeve groove 6210 at the upper end of the sleeve 621 is formed by an inverted T-shaped annular extension arm extending from the inner wall of the sleeve 621 towards the axis of the sleeve 621 and the inner wall of the sleeve 621. Through this extension arm, the inner diameter of the upper end of the sleeve 621 is also reduced to match the output shaft 40 of the drive motor 4. The sleeve groove 6210 at the lower end of the sleeve 621 is formed by the lower end of the sleeve 621. The end face is concave inward along the axial direction of the sleeve 621. Each sleeve groove 6210 contains a sealing ring 7 with an elastically deformable annular structure. The sealing ring 7 and the sleeve 621 are coaxial. On the opposing surfaces of the two sealing rings 7, coaxial inner arms 70 and outer arms 71 extend. That is, the inner arms 70 and outer arms 71 extend downward from the bottom surface of the sealing ring 7 corresponding to the upper sleeve groove 6210, and the inner arms 70 and outer arms 71 extend upward from the top surface of the sealing ring 7 corresponding to the lower sleeve groove 6210. The outer arms 71 are engaged in the sleeve groove 6210, and the sealing ring 7 and the sleeve groove 6210 are engaged together in an alternating engagement manner. The surface of the inner arm 70 facing the center of the sealing ring 7 is a wavy surface. The inner arm 70 of the sealing ring 7 at the end abuts against the output shaft 40 of the drive motor 4, and the inner arm 70 of the sealing ring 7 at the lower end abuts against the outer wall of the first connecting member 5. The wavy structure reduces the contact area between the sealing ring 7 and the first connecting member 5 and the output shaft 40 of the drive motor 4, reducing the resistance to the rotation of the output shaft 40 and the first connecting member 5. The elasticity of the sealing ring 7 can buffer the force applied during the rotation of the first connecting member 5 and the output shaft 40 of the drive motor 4. A clamp 72 is provided between each inner arm 70 and the outer arm 71, which is sleeved on the inner arm 70. The clamp 72 can be an elastically deformable rubber ring, thus forming a sealed cavity between the upper outer wall of the first connecting member 5 and the sleeve 621.

[0042] Although the present invention has been described in detail above with general descriptions and specific embodiments, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention fall within the scope of protection claimed by the present invention.

Claims

1. A mixing device for oral impression materials, characterized in that: The device includes a mounting bracket on which a liquid storage tank, a pump, and a drive motor are mounted. A cylindrical first connector is fixedly connected to the output shaft of the drive motor. A second connector, forming a sealed cavity with the outer wall of the first connector, is rotatably sleeved on the first connector and mounted on the mounting bracket. The pump's inlet and outlet are connected to the liquid storage tank and the sealed cavity respectively via conduits. A water flow sensor is installed on the conduit connecting the pump's outlet to the sealed cavity. The lower part of the first connector extends from the lower end of the second connector and has multiple connector locking blocks spaced circumferentially on its outer wall. The first connector has a through hole on its cylindrical wall corresponding to the sealed cavity. The mounting bracket also has a control panel electrically connected to the pump, drive motor, and water flow sensor.

2. The mixing device for oral impression material according to claim 1, characterized in that... The second connector is provided with a connecting mechanism for connecting the mixing tank. The connecting mechanism is located on the bottom surface of the second connector or on a bottom extension arm that extends downward from the bottom surface of the second connector along its bottom edge and around the second connector.

3. The mixing device for oral impression material according to claim 2, characterized in that... The connecting mechanism is a connector slot provided on the bottom surface of the second connector or the inner wall of the bottom extension arm. The second connector is provided with a micro switch electrically connected to the control panel, and the button of the micro switch extends into the connector slot.

4. The mixing device for oral impression material according to claim 3, characterized in that... The connector slot is formed by an L-shaped protrusion extending from the inner wall of the bottom surface or bottom extension arm of the second connector and the bottom surface of the second connector; two connector slots are arranged side by side at intervals, and a stop is provided on the inner wall of the bottom surface or bottom extension arm of the second connector in front of the entrance of each connector slot. The distance between the two stops and their corresponding connector slots is different. Alternatively, two different stops are arranged at intervals on the inner wall of the bottom surface or bottom extension arm of the second connector in front of the entrance of any connector slot. The distance between the two stops and the connector slots of the adjacent stops is different from the distance between the two connector slots.

5. The mixing device for oral impression material according to claim 1, characterized in that... The second connector includes a lower connector in the shape of a barrel, an intermediate connector in the shape of a cylinder connected to the top of the lower connector, a top cover covering the top of the intermediate connector, and a connecting cylinder in the shape of a cylinder extending from the outer wall of the intermediate connector and communicating with the interior of the intermediate connector. The connecting cylinder is mounted on a mounting bracket, the drive motor is mounted inside the intermediate connector, and the pump is mounted inside the connecting cylinder. The lower connector has a second connector through hole extending from the lower part of the first connector at the center of its inner bottom surface. The lower connector has a sleeve extending upward from its inner bottom surface, which surrounds the second connector through hole and is fitted around the upper part of the first connector, forming a sealed cavity between the upper outer wall of the first connector and the second connector.

6. The mixing device for oral impression material according to claim 5, characterized in that... The upper part of the sleeve is fitted onto the output shaft of the drive motor. Both the upper and lower ends of the sleeve are provided with sleeve grooves that circumferentially surround the sleeve. Each sleeve groove contains a sealing ring with an elastically deformable annular structure. On the opposing surfaces of the two sealing rings, coaxial inner and outer arms extend. The outer arms are fitted into the sleeve grooves. The surfaces of the inner arms facing the center of the sealing rings are wavy. A clamp is provided between each inner and outer arm, fitted onto the inner arm.

7. The mixing device for oral impression material according to claim 1, characterized in that... It also includes a base, the mounting bracket is mounted on the base, and the base is provided with an inclined tray seat for placing the impression tray and a vibration motor for vibrating the tray seat; the control panel is mounted on the mounting bracket or the base.

8. The mixing device for oral impression material according to claim 7, characterized in that... The base has a support frame extending upward from the top, and the support frame is pivotally connected to an upwardly inclined third connector at its upper limit. The tray seat is detachably connected to the end of the third connector away from the support frame, and the vibration motor is installed at the bottom of the tray seat.

9. The mixing device for oral impression material according to claim 8, characterized in that... The support frame is a horizontally placed U-shaped support frame extending upward from the top of the base. A first rotating shaft is provided on the side of the support frame near the center. A support frame slot with a height higher than the height of the first rotating shaft is provided on the inner wall of the support frame near the opening. One end of the third connector is sleeved on the first rotating shaft, and the other end extends out to form a connector extension arm that can engage with the support frame slot. A first shock-absorbing sleeve is provided between the third connector and the first rotating shaft. A second shock-absorbing sleeve is sleeved on the connector extension arm. The tray seat is detachably connected to the end of the third connector with the connector extension arm.

10. The mixing device for oral impression material according to claim 1, characterized in that... The liquid storage tank is provided with a liquid storage tank slot, and a U-shaped elastic pressing handle is provided in the liquid storage tank slot. A top locking block extends from the surface of the pressing handle away from the liquid storage tank slot, and the mounting bracket is provided with a bracket slot that can match and engage with the top locking block.

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