Plaster model trimming machine

Abstract

The invention belongs to the technical field of gypsum model trimming equipment, and particularly relates to a gypsum model trimming machine which comprises a grinding device used for grinding gypsum. The gypsum model trimming machine further comprises an objective table connected to the grinding device, and a plurality of hollow holes are formed in the objective table. The material collecting disc is arranged below the objective table and is connected to the objective table; the spraying device is provided with a spraying pipe used for spraying liquid towards the gypsum model; the suction device is communicated with the material collecting disc, so that chippings falling during grinding are sucked into the material collecting disc through the hollow holes; one end of the recycling pipe is communicated with the material collecting disc, and the other end of the recycling pipe is communicated with a recycling container. According to the gypsum model trimming machine, the functions of grinding, spraying, suction, recycling and the like are integrated, the trimming efficiency and precision of a gypsum model are improved, effective recycling of gypsum powder is achieved, resource waste can be reduced, and the production cost is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of plaster model finishing equipment, and in particular relates to a plaster model finishing machine. Background Art

[0002] The main function of the plaster model trimming machine is to fine-tune the plaster model and deal with the burrs and unevenness on the surface of the plaster model to achieve a smooth effect. Among them, the plaster model trimming machine is an indispensable equipment in the oral restoration production room. It is used to process and trim plaster products, such as dental denture models. Through trimming, the model is made more beautiful and neat, which is convenient for subsequent operation and preservation. It can be used in dentistry, correction, medicine, beauty and other industries.

[0003] When using a plaster model finishing machine to trim plaster, the raw gypsum powder will be lost with the water flow and cannot be recycled, resulting in a waste of resources. At the same time, the grinding head is prone to clogging during use, which may cause equipment damage or poor use effect.

[0004] Based on the problem in the prior art that raw gypsum powder cannot be recycled and causes waste of resources, a more reasonable technical solution is needed to solve the current technical problems. Summary of the invention

[0005] The purpose of the present invention is to provide a gypsum model finishing machine to solve the problem that raw gypsum powder in the prior art cannot be recycled and causes waste of resources.

[0006] In order to achieve the above-mentioned object, the present invention provides a plaster model finishing machine, comprising a grinding device for grinding plaster; the plaster model finishing machine also includes:

[0007] A stage connected to the grinding device, wherein a plurality of hollow holes are provided on the stage;

[0008] A collecting tray is arranged below the loading platform and connected to the loading platform;

[0009] a spraying device having a spraying pipe for spraying liquid toward the plaster model;

[0010] A suction device connected to the collecting tray so that the debris dropped by grinding is sucked into the collecting tray through the hollow holes; and

[0011] A recovery pipe has one end connected to the collecting tray and the other end connected to the recovery container.

[0012] In a possible design, the recovery pipe is arranged at an angle;

[0013] The inclination angle of the recovery pipe is α, 5°≤α≤30°.

[0014] In a possible design, the recovery pipe is provided with a first nozzle and a second nozzle, the first nozzle and the second nozzle are respectively connected to the liquid source through branch pipes, and each branch pipe is provided with a control valve, and the control valve is communicatively connected to the controller.

[0015] In a possible design, the spraying directions of the first nozzle and the second nozzle are arranged obliquely relative to the flow direction of the liquid.

[0016] In a possible design, the nozzle shapes of the first nozzle and the second nozzle are different, wherein the first nozzle is configured as a wide-mouth type so that the spray liquid is diffusely sprayed; and the second nozzle is configured as a closed-mouth type so that the spray liquid is concentratedly sprayed.

[0017] In a possible design, at least one of the first punch nozzle and the second punch nozzle is provided and they are arranged alternately with each other.

[0018] In a possible design, the grinding device includes a body and a grinding disc rotatably connected to the body, and a first grinding area and a second grinding area are formed on the grinding disc, wherein the grinding radius of the first grinding area is r, and the grinding radius of the second grinding area is R, R>r; the second grinding area is located at the periphery of the first grinding area; and the particle size of the first grinding area is smaller than the particle size of the second grinding area.

[0019] In a possible design, a baffle is provided on the periphery of the grinding disc; and the bottom surface of the collecting disc is an inclined guide surface.

[0020] In a possible design, an annular bladeless fan is provided on the outer periphery of the grinding disc, and the air outlet direction of the bladeless fan is toward the loading platform.

[0021] In a possible design, the plaster model finishing machine also includes a detection mechanism and a controller, wherein the detection mechanism is used to detect current sediment information at the bottom of the recovery pipe; the controller is communicatively connected to the grinding device, the spraying device, the suction device and the detection mechanism to control the grinding device, the spraying device and the suction device to perform corresponding actions according to the sediment information.

[0022] The grinding device can grind the gypsum model accurately to ensure that the shape and size of the model meet the requirements. The stage is connected to the grinding device to stably support the gypsum model. The stage is provided with a plurality of hollow holes, which are designed to allow the debris generated during the grinding process to pass through, so as to facilitate subsequent collection and treatment. The collecting tray can collect the gypsum debris falling from the hollow holes of the stage. The spraying device can spray liquid (such as water or coolant) on the gypsum model during the grinding process, which can reduce the grinding temperature, reduce thermal deformation, and improve the grinding efficiency. The suction device is connected to the collecting tray, and the debris generated during the grinding process is sucked into the collecting tray through the hollow holes of the stage through the negative pressure, thereby ensuring the cleanliness of the working area and preventing the debris from flying and causing pollution. One end of the recovery pipe is connected to the collecting tray, and the other end is connected to the recovery container, which can transport the gypsum debris collected in the collecting tray to the recovery container to realize the recycling of raw gypsum powder.

[0023] Through the above technical solution, the gypsum model finishing machine not only improves the finishing efficiency and accuracy of the gypsum model by integrating grinding, spraying, suction and recycling functions, but also realizes the effective recycling of raw gypsum powder, which is beneficial to reduce resource waste and production costs, and is in line with the current concept of environmental protection and sustainable development. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 is a schematic structural diagram of a plaster model finishing machine provided by the present invention in one embodiment;

[0026] Figure 2 It is a schematic structural diagram of a recovery tube and a recovery container in a plaster model finishing machine provided by the present invention in one embodiment;

[0027] Figure 3 It is a schematic structural diagram of a recovery pipe in a plaster model finishing machine provided by the present invention in one state;

[0028] Figure 4 It is a schematic structural diagram of a recovery pipe in a plaster model finishing machine provided by the present invention in another state;

[0029] Figure 5 The present invention is a schematic structural diagram of a recovery pipe in a gypsum model finishing machine in another state.

[0030] In the above drawings: 1-grinding device, 11-machine body, 12-grinding disc, 121-first grinding area, 122-second grinding area, 13-baffle, 2-stage, 21-hollow hole, 3-collecting tray, 4-recovery pipe, 5-recovery container, 61-first punching nozzle, 62-second punching nozzle. DETAILED DESCRIPTION

[0031] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. It should be noted that although the description of these embodiments is used to help understand the present invention, it does not constitute a limitation of the present invention. The specific structures and functional details disclosed herein are only used to describe the embodiments of the present invention. However, the present invention can be embodied in many alternative forms, and it should not be understood that the present invention is limited to the embodiments set forth herein.

[0032] According to a specific embodiment of the present invention, a plaster model finishing machine is provided, wherein: Figures 1 to 5 One specific embodiment is shown.

[0033] See also Figures 1 to 5 As shown, the gypsum model finishing machine includes a grinding device 1 for grinding gypsum. The gypsum model finishing machine also includes: a stage 2 connected to the grinding device 1, and a plurality of hollow holes 21 are provided on the stage 2; a collecting tray 3, which is arranged below the stage 2 and connected to the stage 2; a spray device, which has a spray pipe for spraying liquid toward the gypsum model; a suction device, which is connected to the collecting tray 3, so that the debris dropped by grinding is sucked into the collecting tray 3 through the hollow holes 21; and a recovery pipe 4, one end of which is connected to the collecting tray 3, and the other end is connected to the recovery container 5. In this way, the recycling of raw gypsum powder is achieved, and resource waste is reduced.

[0034] The grinding device 1 can perform precise grinding on the gypsum model to ensure that the shape and size of the model meet the requirements. The stage 2 is connected to the grinding device 1 and is used to stably support the gypsum model. The stage 2 is provided with a plurality of hollow holes 21, which are designed to allow the debris generated during the grinding process to pass through, so as to facilitate subsequent collection and treatment. The collecting tray 3 can collect the gypsum debris falling from the hollow holes 21 of the stage 2. The spraying device can spray liquid (such as water or coolant) on the gypsum model during the grinding process, which can reduce the grinding temperature, reduce thermal deformation, and improve the grinding efficiency. The suction device is connected to the collecting tray 3, and the debris generated during the grinding process is sucked into the collecting tray 3 through the hollow holes 21 of the stage 2 through the negative pressure, thereby ensuring the cleanliness of the working area and preventing the debris from flying and causing pollution. One end of the recovery pipe 4 is connected to the collecting tray 3, and the other end is connected to the recovery container 5, which can transport the gypsum debris collected in the collecting tray 3 to the recovery container 5 to achieve the recycling of raw gypsum powder.

[0035] Through the above technical solution, the gypsum model finishing machine not only improves the finishing efficiency and accuracy of the gypsum model by integrating grinding, spraying, suction and recycling functions, but also realizes the effective recycling of raw gypsum powder, which is beneficial to reduce resource waste and production costs, and is in line with the current concept of environmental protection and sustainable development.

[0036] In one embodiment provided by the present disclosure, the recovery pipe 4 is tilted. The tilted recovery pipe 4 design helps the gypsum debris flow more smoothly under the action of gravity, reducing the risk of blockage. At the same time, the tilted recovery pipe 4 also helps the debris enter the recovery container 5 faster, thereby improving the efficiency of the entire recovery process. In addition, the tilted recovery pipe 4 design is also easy to clean and maintain, which helps to keep the equipment in good working condition.

[0037] Furthermore, the recovery pipe 4 has an inclination angle of α, 5°≤α≤30°. An appropriate inclination angle helps the debris enter the recovery container 5 faster, shortens the collection time, and improves the collection efficiency. Within this angle range, the gravity effect matches the flow characteristics of the debris, making the collection process more efficient.

[0038] Specifically, when the inclination angle α of the recovery pipe 4 is too small (close to 0°), the debris may have difficulty flowing smoothly due to insufficient gravity, increasing the risk of blockage. When the inclination angle α is too large (over 30°), although the gravity effect is enhanced, the excessively large angle may cause the debris to flow too fast, and may even cause splashing, affecting the collection effect.

[0039] Therefore, by controlling α between 5° and 30°, a balance can be found to ensure that the debris can flow smoothly while avoiding splashing and clogging.

[0040] In an exemplary embodiment provided by the present disclosure, a first flushing nozzle 61 and a second flushing nozzle 62 are provided on the recovery pipe 4, and the first flushing nozzle 61 and the second flushing nozzle 62 are respectively connected to the liquid source through a branch pipe, and a control valve is provided on each branch pipe, and the control valve is communicatively connected to the controller. The first flushing nozzle 61 and the second flushing nozzle 62 are provided to flush the gypsum debris at different positions of the recovery pipe 4, thereby more thoroughly removing the debris attached to the inner wall of the pipe, keeping the pipe clean and unobstructed, reducing equipment failures caused by blockage, and thus extending the service life of the equipment.

[0041] The control valve on each branch pipe can independently control the flushing operation of the corresponding flushing nozzle, making the flushing process more flexible and controllable. The communication connection between the controller and the control valve allows the operator to remotely monitor and control the flushing process through the controller, improving the convenience and safety of operation. The introduction of the controller enables the entire flushing system to be automatically controlled, reducing the intervention of manual operation and improving the automation and operation efficiency of the system. By accurately controlling the flushing time and flushing volume, liquid resources can be used more effectively to avoid waste.

[0042] Specifically, the spraying direction of the first flushing nozzle 61 and the second flushing nozzle 62 is inclined relative to the flow direction of the liquid. The inclined flushing nozzle can spray the liquid flow onto the inner wall of the recovery pipe 4 at a certain angle, forming a larger flushing area and a stronger flushing force, thereby more effectively removing the gypsum debris attached to the inner wall of the pipe. At the same time, it can also reduce the splashing and waste of liquid during the flushing process, and improve the utilization rate of the liquid.

[0043] If the spray direction of the nozzle is completely consistent with the liquid flow direction, the liquid flow may be blocked by the inner wall of the pipe, resulting in reduced flushing effect. Based on this technical solution, the spray directions of the first nozzle 61 and the second nozzle 62 are tilted, which can reduce the direct contact area between the liquid flow and the inner wall of the pipe, thereby reducing the liquid flow resistance and improving the flushing efficiency.

[0044] In addition, the spray direction of the nozzle is directly aligned with the flow direction of the liquid, which may cause the liquid flow to directly hit the other end of the pipe, causing partial over-flushing or under-flushing. By tilting the spray directions of the first nozzle 61 and the second nozzle 62, the liquid flow can be more evenly distributed on the inner wall of the pipe, improving the uniformity of flushing, and more easily adapting to recovery pipes 4 of different shapes and layouts, making the flushing process more flexible and controllable.

[0045] Furthermore, the nozzle shapes of the first nozzle 61 and the second nozzle 62 are different, wherein the first nozzle 61 is configured as a wide-mouth type so that the spray liquid is diffusely sprayed; and the second nozzle 62 is configured as a narrow-mouth type so that the spray liquid is concentratedly sprayed.

[0046] The wide-mouth first flushing nozzle 61 allows the spray liquid to be sprayed at a larger diffusion angle, covering a wider area, and is particularly suitable for the initial stage of flushing the recovery pipe 4 or when gypsum debris is attached to a large area, and can quickly remove most of the debris on the inner wall of the pipe. The wide-mouth nozzle can also reduce the direct impact of the liquid flow on a certain point of the pipe, reducing the risk of pipe wear.

[0047] The closed-end second flushing nozzle 62 allows the spray liquid to be ejected in a more concentrated manner, forming a stronger impact force, which is suitable for deep cleaning of the inner wall of the pipe, especially for stubborn debris or attachments that are difficult to remove. Therefore, it can be used to focus on flushing specific areas to improve the pertinence and efficiency of flushing.

[0048] By combining two different shapes of nozzles, wide-mouth and narrow-mouth, the recycling pipe 4 flushing system of the plaster model finishing machine can achieve a more comprehensive cleaning effect. The wide-mouth nozzle is used for preliminary cleaning and expanding the cleaning range, while the narrow-mouth nozzle is used for deep cleaning and key cleaning, which not only improves the flushing efficiency, but also enhances the flexibility and adaptability of the system, allowing the equipment to better cope with different situations and needs. At the same time, nozzles of different shapes can also be replaced and adjusted as needed to further optimize the flushing effect.

[0049] In order to improve the flushing effect on the deposited gypsum powder, at least one of the first flushing nozzle 61 and the second flushing nozzle 62 is provided and they are alternately arranged.

[0050] Among them, the first nozzle 61 and the second nozzle 62 are configured as at least one, so that at each required flushing position, there is at least one nozzle working to ensure full coverage of the flushing effect. The first nozzle 61 and the second nozzle 62 are alternately arranged to achieve a more uniform flushing effect and avoid excessive accumulation of gypsum powder in certain areas due to insufficient flushing. The alternating arrangement can also reduce the flushing blind area and ensure that the gypsum powder in the entire flushing area can be effectively removed. By increasing the number of nozzles and setting them alternately, the coverage area of ​​the flushing area can be increased while enhancing the flushing force. This helps to remove the deposited gypsum powder more quickly and thoroughly. The alternately arranged nozzles can form a continuous flushing flow, reduce interruptions and stagnation during the flushing process, and thus improve the flushing efficiency. The uniform flushing effect helps to maintain the surface quality of the plaster model and reduce flaws and defects caused by uneven flushing.

[0051] In the present disclosure, the grinding device 1 includes a body 11 and a grinding disc 12 rotatably connected to the body 11, and a first grinding area 121 and a second grinding area 122 are formed on the grinding disc 12, wherein the grinding radius of the first grinding area 121 is r, and the grinding radius of the second grinding area 122 is R, R>r; the second grinding area 122 is located at the periphery of the first grinding area 121; the particle size of the first grinding area 121 is smaller than the particle size of the second grinding area 122.

[0052] The body 11 serves as the basic part of the grinding device 1 (prior art), and the body 11 provides a stable support and connection point. The first grinding area 121 on the grinding disc 12 is located on the inner side or central area of ​​the grinding disc 12, and the grinding radius is defined as r, which represents the distance from the center of the grinding disc 12 to the edge of the area. The particle size of the first grinding area 121 is relatively small, that is, the abrasive particles are finer, which is suitable for fine grinding. The second grinding area 122 is located on the periphery of the first grinding area 121, that is, the outer area of ​​the grinding disc 12, and the grinding radius is defined as R, and R>r, indicating that the grinding range of this area is wider. The particle size of the second grinding area 122 is relatively large, that is, the abrasive particles are coarser, which is suitable for rough grinding.

[0053] When the grinding disc 12 rotates, the first grinding zone 121 and the second grinding zone 122 will contact the workpiece in turn. First, the second grinding zone 122 (coarse grain) will quickly remove a large amount of excess on the workpiece surface to achieve a rough grinding effect. Then, the first grinding zone 121 (fine grain) will further refine the workpiece surface, improve the finish and accuracy, and achieve a fine grinding effect.

[0054] By integrating the rough grinding and fine grinding functions on one grinding disc 12, the time for disc replacement and adjustment is reduced, and the work efficiency is improved. Since the rough grinding and fine grinding are completed continuously in the same grinding process, it is easier to control the final size and shape accuracy of the workpiece. The number of grinding discs 12 with different particle sizes that need to be purchased and stored is reduced, which reduces costs.

[0055] Furthermore, a baffle 13 is provided on the outer periphery of the grinding disc 12, and the baffle 13 can prevent the gypsum chips and dust generated during the grinding process from flying around. The baffle 13 can effectively control the chips and dust in the grinding area, reducing the pollution and interference to the surrounding environment and operators. The baffle 13 can also guide the flow of chips and dust, making them easier to collect and process, thereby keeping the working area clean and hygienic.

[0056] The collecting tray 3 is an important component of the grinding device 1 for collecting and processing gypsum debris and waste liquid generated after grinding. In order to improve the collection efficiency of the collecting tray 3 and facilitate subsequent processing, the bottom surface of the collecting tray 3 is an inclined guide surface. The inclined guide surface can make it easier for gypsum debris and waste liquid to flow to the outlet or collection area of ​​the collecting tray 3 under the action of gravity, reducing the risk of accumulation and blockage. In addition, the inclined guide surface can also facilitate the operator to clean and maintain the collecting tray 3, keep it in good working condition and extend its service life.

[0057] In the present disclosure, an annular bladeless fan is provided on the outer periphery of the grinding disc 12, and the air outlet direction of the bladeless fan is all toward the stage 2. The bladeless fan is installed on the outer periphery of the grinding disc 12 to form an annular structure surrounding the grinding disc 12, which can effectively utilize the airflow power generated when the grinding disc 12 rotates. The air outlet direction of the fan is all toward the stage 2, so that during the grinding process, the airflow generated by the fan will directly blow toward the plaster model or workpiece on the stage 2.

[0058] The airflow of the bladeless fan can effectively help dissipate heat and reduce the working temperature, thereby protecting the plaster model and the grinding disc 12 from thermal damage. The airflow generated by the fan can also help remove the plaster chips and dust generated during the grinding process, making it easier to collect and handle, and keeping the work area clean.

[0059] An annular bladeless fan is arranged on the outer periphery of the grinding disc 12, and the air outlet direction is toward the stage 2. This design not only enhances the heat dissipation and cleaning functions of the grinding device 1, but also improves the grinding efficiency and user experience. Such an innovative design makes the grinding device 1 more excellent in performance and brings a more efficient, safe and comfortable working experience to the user.

[0060] The bladeless fan uses a centrifugal compressor and air multiplication technology to suck air in through a motor, and blow it out from the gap on the inner side of the ring after pressurization, making the air flow more natural, and can drive a large amount of air convection to achieve an increase in air volume. The bladeless fan has no exposed blades, which can reduce safety hazards. Because the structure and working principle of the bladeless fan are both existing technologies, the present disclosure is only used for illustrative purposes. Those skilled in the art can make routine improvements to the bladeless fan in the prior art based on the technical concept of the present disclosure.

[0061] In the present disclosure, the spray device includes a spray pipe, a hydraulic pump and a liquid source, so that one end of the spray pipe is provided with a nozzle, and the other end is connected to the hydraulic pump, and the hydraulic pump is connected to the liquid source, so that the spray liquid is drawn out and sprayed onto the plaster model through the nozzle. Since the spray mechanism is a prior art, the present disclosure does not elaborate on it.

[0062] The suction device is based on the working principle of negative pressure attraction, that is, the surrounding air, water and debris are sucked into the device together by using the strong suction force generated by the exhaust fan. Specifically, the suction device for the debris is realized by using a device such as an exhaust fan that can generate negative pressure.

[0063] In an embodiment provided in the present disclosure, the plaster model finishing machine also includes a detection mechanism and a controller, the detection mechanism is used to detect the current sediment information at the bottom of the recovery pipe 4; the controller is communicatively connected to the grinding device 1, the spraying device, the suction device and the detection mechanism, and can control the grinding device 1, the spraying device and the suction device to perform corresponding actions according to the sediment information.

[0064] The detection mechanism is mainly used to detect the current sediment information at the bottom of the recovery pipe 4. This includes key parameters such as the thickness, range, and density of the sediment, thereby providing a basis for evaluating the grinding effect and determining subsequent processing steps. The controller is connected to the grinding device 1, the spray device, the suction device, and the detection mechanism through a communication line or a wireless network to form a closed-loop control system.

[0065] According to the sediment information provided by the detection mechanism, the controller uses the preset algorithm and logical judgment to correspondingly control the grinding device 1, the spray device and the suction device to perform corresponding actions. For example, if there are too many sediments or the density is too large, the controller may instruct the grinding device 1 to reduce the grinding force, while increasing the flushing frequency of the spray device and the suction force of the suction device to keep the recovery pipe 4 unobstructed and clean. Through real-time monitoring and intelligent control, the gypsum model finishing machine can more accurately grasp the key parameters in the grinding process, thereby improving the finishing efficiency and accuracy. At the same time, it can also reduce waste and loss, extend the service life of the equipment, and thus reduce the overall operating cost. Automated operation and intelligent control make the gypsum model finishing machine easier to use and maintain, bringing users a more convenient and efficient working experience.

[0066] The detection mechanism uses optical sensors, weight sensors, image recognition technology and other means to monitor the sediment in the recovery pipe 4 in real time. Specifically, the detection mechanism is configured as a radar flow meter, a Hall water flow sensor or a flow sensor.

[0067] It should be noted that the radar flow meter, Hall water flow sensor, flow sensor and controller all adopt existing technologies.

[0068] In the present disclosure, the controller is configured as a PLC logic controller.

[0069] Specifically, in the present invention, the controller may also be configured as a central processing unit (CPU). In other embodiments, the controller may also be configured as a digital signal processor (DSP), an application specific integrated circuit (ASIC), or a field programmable gate array (FPGA).

[0070] In the present disclosure, the controller is connected to the grinding device 1, the spray device, the suction device and the detection mechanism through cables. In other embodiments, the controller can also be connected to the grinding device 1, the spray device, the suction device and the detection mechanism through wireless communication modules such as WiFi modules and ZigBee modules. In this regard, those skilled in the art can flexibly configure it under the technical concept of the present disclosure.

[0071] Finally, it should be noted that the present invention is not limited to the above optional implementations, and anyone can derive other various forms of products under the enlightenment of the present invention. The above specific implementations should not be understood as limiting the scope of protection of the present invention. The scope of protection of the present invention should be based on the definition in the claims, and the description can be used to interpret the claims.

Claims

1. A plaster model finishing machine, comprising a grinding device for grinding plaster, characterized in that: The plaster model finishing machine also includes: A stage connected to the grinding device, wherein a plurality of hollow holes are provided on the stage; A collecting tray is arranged below the loading platform and connected to the loading platform; a spraying device having a spraying pipe for spraying liquid toward the plaster model; A suction device connected to the collecting tray so that the debris dropped by grinding is sucked into the collecting tray through the hollow holes; and A recovery pipe has one end connected to the collecting tray and the other end connected to the recovery container.

2. The plaster model finishing machine according to claim 1, characterized in that: The recovery pipe is arranged obliquely; The inclination angle of the recovery pipe is α, 5°≤α≤30°.

3. The plaster model finishing machine according to claim 1, characterized in that: The recovery pipe is provided with a first flushing nozzle and a second flushing nozzle, the first flushing nozzle and the second flushing nozzle are respectively connected to the liquid source through branch pipes, and each branch pipe is provided with a control valve, and the control valve is communicatively connected to the controller.

4. The plaster model finishing machine according to claim 3, characterized in that: The liquid spraying directions of the first nozzle and the second nozzle are arranged obliquely relative to the flow direction of the liquid.

5. The plaster model finishing machine according to claim 3, characterized in that: The nozzle shapes of the first nozzle and the second nozzle are different, wherein the first nozzle is configured as a wide-mouth type so that the spray liquid is diffusely sprayed; and the second nozzle is configured as a narrow-mouth type so that the spray liquid is concentratedly sprayed.

6. The plaster model finishing machine according to claim 3, characterized in that: The first punch nozzle and the second punch nozzle are provided in at least one and are arranged alternately with each other.

7. The plaster model finishing machine according to claim 1, characterized in that: The grinding device includes a body and a grinding disc rotatably connected to the body, and a first grinding area and a second grinding area are formed on the grinding disc, wherein the grinding radius of the first grinding area is r, and the grinding radius of the second grinding area is R, R>r; the second grinding area is located at the periphery of the first grinding area; the particle size of the first grinding area is smaller than the particle size of the second grinding area.

8. The plaster model finishing machine according to claim 7, characterized in that: The outer periphery of the grinding disc is provided with a baffle; the bottom surface of the collecting disc is an inclined guide surface.

9. The plaster model finishing machine according to claim 7, characterized in that: An annular bladeless fan is arranged on the outer periphery of the grinding disc, and the air outlet direction of the bladeless fan is toward the loading platform.

10. The plaster model finishing machine according to any one of claims 1 to 9, characterized in that: The plaster model finishing machine also includes a detection mechanism and a controller, wherein the detection mechanism is used to detect current sediment information at the bottom of the recovery pipe; the controller is communicatively connected to the grinding device, the spraying device, the suction device and the detection mechanism to control the grinding device, the spraying device and the suction device to perform corresponding actions according to the sediment information.

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