A silicone layer-by-layer curing 3D printer and printing method

Abstract

The present invention relates to the field of silicone 3D printing equipment, and specifically discloses a silicone layer-by-layer curing 3D printer, including a lifting and translation mechanism, a printing assembly, a printing platform, a temperature measuring mechanism, an infrared curing mechanism and an infrared curing driving mechanism, wherein the printing platform has a model printing slot and a temperature measuring model slot, and the temperature measuring mechanism includes a temperature measuring probe and a probe lifting mechanism, wherein the probe lifting mechanism is arranged at the bottom of the printing platform, the temperature measuring probe is connected to the probe lifting mechanism, and extends from the surface of the temperature measuring model slot through the printing platform; the temperature measuring probe is used to detect the temperature of the model in contact with the temperature measuring probe, and the probe lifting mechanism is used to drive the temperature measuring probe to rise and fall. An embodiment of the present invention also discloses a silicone layer-by-layer curing 3D printing method. By adopting the present invention, layer-by-layer printing and layer-by-layer photocuring of liquid silicone can be realized, with high processing efficiency and stable quality.

Description

Technical Field

[0001] The present invention relates to the technical field of 3D printing of silicone materials, and in particular to a silicone layer-by-layer curing 3D printer and a printing method. Background Art

[0002] Liquid silicone is a high-viscosity liquid material. The 3D models printed with it are widely used in the personalized customization of braces required for dental orthodontics.

[0003] Since 3D printing is different from traditional molding methods, its essence is to form a three-dimensional model by stacking materials layer by layer. The layer-by-layer printing and curing process must strictly control the heating time, because a brace of ordinary precision needs to be printed at least thousands of layers. Calculated by curing for 8 seconds, the time spent on curing alone is several hours. In addition to the printing of the print head and other links, a printer needs nearly a day to print a brace model. The production efficiency is low and it is difficult to meet market demand. If the infrared power used for heating is increased, since liquid silicone needs to be heated from a state close to room temperature to a curing temperature of about 100 degrees in a few seconds, the heat energy absorbed in a short time is large, and the printing material, the shape of the printed model and the ambient temperature will affect the heating speed of the liquid silicone. The existing technology is difficult to accurately predict the temperature of the model. Therefore, once the heating power is increased and the heating time is shortened, it is easy to cause poor curing due to insufficient heating of a certain layer of the model, or cause silicone to denature or even burn due to excessive heating.

[0004] There are existing devices that use layer-by-layer printing technology, such as the invention patent with publication number CN115401910, entitled "A Method for Using a Silicone 3D Printing Thermal Curing Molding Equipment Machine", which discloses a silicone layer-by-layer printing device, which sets a temperature detection device on one side of the printing platform, and then detects the temperature of the model during the thermal curing process through the detection probe and the heat absorption plate on the temperature detection device, thereby meeting the temperature control requirements during the thermal curing process. However, the heat absorption capacity of the above-mentioned heat absorption plate is different from that of liquid silicone, and after being transmitted layer by layer through the larger heat absorption plate and the detection probe, the temperature measurement data lags seriously and cannot quickly reflect the current temperature of the model. Summary of the invention

[0005] In order to solve the defects of the prior art, the present invention provides a silicone layer-by-layer curing 3D printer and a printing method, which can realize layer-by-layer printing and layer-by-layer photocuring of liquid silicone, with high processing efficiency and stable quality.

[0006] In order to solve the above technical problems, an embodiment of the present invention provides a silicone layer-by-layer curing 3D printer, including a lifting and translation mechanism, a printing assembly, a printing platform, a temperature measuring mechanism, an infrared curing mechanism and an infrared curing driving mechanism.

[0007] The printing assembly is arranged on the lifting and translation mechanism, and includes a containing tank and a printing head;

[0008] The lifting and translation mechanism comprises a gantry, a front-and-rear translation mechanism and a lifting mechanism, wherein the front-and-rear translation mechanism is arranged on the gantry and can translate forward and backward along the gantry, the lifting mechanism is arranged on the front-and-rear translation mechanism, the container is arranged on the lifting mechanism, and the lifting mechanism can drive the container to move up and down;

[0009] The infrared curing drive mechanism is arranged on one side of the printing platform, and the infrared curing mechanism includes a top infrared generating mechanism. The infrared curing drive mechanism is connected to the infrared curing mechanism and can drive the top infrared generating mechanism to move between a working station located directly above the printing platform and a standby station located on the side of the printing platform;

[0010] The printing platform has a model printing slot and a temperature measuring model slot, the temperature measuring mechanism includes a temperature measuring probe and a probe lifting mechanism, the probe lifting mechanism is arranged at the bottom of the printing platform, the temperature measuring probe is connected to the probe lifting mechanism, and passes through the printing platform and extends from the surface of the temperature measuring model slot;

[0011] The temperature measuring probe is used to detect the temperature of the model in contact with the temperature measuring probe, and the probe lifting mechanism is used to drive the temperature measuring probe to rise and fall.

[0012] As an improvement of the above-mentioned scheme, the infrared curing drive mechanism includes a main swing arm, a driving arm, a swing arm cylinder and a limit base; the limit base is provided with a limit plate, and the limit plate is provided with a limit inclined groove; the upper end of the main swing arm is connected to the top infrared generating mechanism, and the lower end is provided with a pulley, and the pulley is located in the limit inclined groove; one end of the driving arm is hinged to the limit base, and the other end is hinged to the main swing arm; the swing arm cylinder is arranged on the limit base, and the piston rod of the swing arm cylinder is connected to the driving arm, which can drive the driving arm to swing up and down.

[0013] As an improvement of the above solution, the printing platform is provided with an avoidance groove, the limiting base is formed by extending downward from the side wall of the avoidance groove, and the main swing arm and the driving arm are both arranged in the avoidance groove.

[0014] As an improvement of the above scheme, the limiting inclined groove includes an inclined section which gradually inclines from top to bottom toward the side where the model printing groove is located, and a horizontal section at the end of the inclined section which continues to extend toward the side where the model printing groove is located; the pulley can slide in the limiting inclined groove.

[0015] As an improvement of the above solution, the probe lifting mechanism is a screw module, and a ring-shaped temperature measuring section is provided on the side of the temperature measuring probe.

[0016] As an improvement of the above scheme, the infrared curing drive mechanism also includes a secondary swing arm, the front end of which is connected to the top infrared generating mechanism, the rear end of which is connected to the side infrared spot generating mechanism, and the secondary swing arm is also connected to the main swing arm.

[0017] As an improvement of the above-mentioned scheme, the printing platform is provided with a rotation drive mechanism and a tilt drive mechanism, the tilt drive mechanism includes a tilt motor and a tilt seat, the rotation drive mechanism includes a rotation motor and a rotation connecting seat, the tilt motor is horizontally placed and connected to the tilt seat; the rotation motor is vertically arranged on the tilt seat and connected to the rotation connecting seat; the rotation connecting seat is connected to the printing platform.

[0018] As an improvement of the above scheme, the front-to-back translation mechanism includes a slide groove arranged on the gantry, and the lifting mechanism includes a sliding seat connected to the linear motor. The sliding seat can be lifted and lowered along the lifting mechanism under the drive of the linear motor, and the holding tank is arranged on the sliding seat.

[0019] Accordingly, a silicone layer-by-layer curing 3D printing method includes the silicone layer-by-layer curing 3D printer as described above, specifically comprising the following steps:

[0020] S1. The infrared curing driving mechanism drives the infrared curing mechanism to move to the standby position to avoid obstruction to the movement of the print head;

[0021] S2, the lifting and translation mechanism drives the print head to move on the printing platform, prints a layer of model on the model printing slot, and prints a layer of temperature measurement model of the same height on the temperature measurement model slot;

[0022] S3, the infrared curing driving mechanism drives the infrared curing mechanism to move to the working station, and the top infrared generating mechanism emits infrared rays downward from above the model to heat up the model and the temperature measuring model at the same time;

[0023] S4, the temperature measuring probe detects the temperature of the temperature measuring model in real time, and when the temperature of the temperature measuring model reaches a predetermined temperature, the infrared ray of the top infrared generating mechanism is turned off;

[0024] S5. Repeat steps S1-S5 until the model is printed.

[0025] As an improvement of the above scheme, during step S3, the probe lifting mechanism drives the temperature measuring probe to continuously vibrate up and down within a predetermined stroke; an annular temperature measuring section is provided on the side of the temperature measuring probe, and after a single layer of curing is completed, the probe lifting mechanism drives the temperature measuring probe to lift a predetermined height, so that the annular temperature measuring section is in the uncured model printing layer.

[0026] Implementing the embodiments of the present invention has the following beneficial effects:

[0027] With the above structure, the infrared curing mechanism can move along a predetermined track, leaving space for the printing of the print head, so that layer-by-layer printing and layer-by-layer light curing processes can be implemented.

[0028] The printing platform has a model printing slot and a temperature measuring model slot. The print head can print the required silicone model in the model printing slot and print a model for temperature measurement at the same height in the temperature measuring model slot. The temperature of the temperature measuring model is monitored in real time by the temperature measuring probe, so that the current temperature of the liquid silicone layer of the required silicone model can be accurately and quickly known. In conjunction with high-power infrared equipment, the liquid silicone layer can be quickly heated and the maximum temperature can be controlled to ensure the curing quality and improve the printing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the overall structure of an embodiment of a silicone layer-by-layer curing 3D printer of the present invention;

[0030] Figure 2 It is a schematic diagram of the assembly relationship of a printing platform, a temperature measuring mechanism, an infrared curing mechanism and an infrared curing driving mechanism according to an embodiment of the present invention;

[0031] Figure 3 It is a schematic diagram of the assembly relationship of the printing platform, the temperature measuring mechanism, the infrared curing mechanism and the infrared curing driving mechanism in another perspective of an embodiment of the present invention;

[0032] Figure 4 is a schematic structural diagram of a rotation drive mechanism and an inclination drive mechanism according to an embodiment of the present invention;

[0033] Figure 5 It is a structural schematic diagram of a lifting and translation mechanism according to an embodiment of the present invention;

[0034] Figure 6 1 is a curing principle diagram of an embodiment of the present invention. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings. It is hereby stated that the directional terms such as up, down, left, right, front, back, inside, outside, etc. that appear or will appear in the text of the present invention are only based on the accompanying drawings of the present invention, and are not specific limitations of the present invention.

[0036] like Figure 1 As shown, the first embodiment of the present invention provides a silicone layer-by-layer curing 3D printer, including a lifting and translation mechanism 1, a printing assembly 2, a printing platform 3, a temperature measuring mechanism 4, an infrared curing mechanism 5 and an infrared curing driving mechanism 6.

[0037] The printing assembly 2 is arranged on the lifting and translation mechanism 1, and includes a containing tank 21 and a printing head 22;

[0038] The lifting and translation mechanism 1 includes a gantry 11, a front-to-back translation mechanism 12 and a lifting mechanism 13. The front-to-back translation mechanism 12 is arranged on the gantry 11 and can be translated forward and backward along the gantry 11. The lifting mechanism 13 is arranged on the front-to-back translation mechanism 12. The container 21 is arranged on the lifting mechanism 13. The lifting mechanism 13 can drive the container 21 to move up and down.

[0039] The infrared curing drive mechanism 6 is arranged on one side of the printing platform 3, and the infrared curing mechanism 5 includes a top infrared generating mechanism 51. The infrared curing drive mechanism 6 is connected to the infrared curing mechanism 5, and can drive the top infrared generating mechanism 51 to move between a working station located directly above the printing platform 3 and a standby station located on the side of the printing platform 3;

[0040] The printing platform 3 has a model printing slot 31 and a temperature measuring model slot 32. The temperature measuring mechanism 4 includes a temperature measuring probe 41 and a probe lifting mechanism 42. The probe lifting mechanism 42 is arranged at the bottom of the printing platform 3. The temperature measuring probe 41 is connected to the probe lifting mechanism 42 and passes through the printing platform 3 and extends from the surface of the temperature measuring model slot 32.

[0041] The temperature measuring probe 41 is used to detect the temperature of the model in contact with the temperature measuring probe 41 , and the probe lifting mechanism 42 is used to drive the temperature measuring probe 41 to rise and fall.

[0042] With the above structure, the infrared curing mechanism 5 can move along a predetermined track to leave space for the printing of the print head 22, so that layer-by-layer printing and layer-by-layer light curing processes can be implemented.

[0043] The printing platform 3 has a model printing slot 31 and a temperature measuring model slot 32. The print head 22 can print the required silicone model in the model printing slot 31, and print a model for temperature measurement at the same height in the temperature measuring model slot 32. The temperature of the temperature measuring model is monitored in real time by the temperature measuring probe 41, so that the current temperature of the liquid silicone layer of the printed target silicone model can be accurately and quickly known. In conjunction with high-power infrared equipment, the liquid silicone layer can be quickly heated and the maximum temperature can be controlled to ensure the curing quality and improve the printing efficiency.

[0044] Combination Figure 2 and Figure 3As shown, since the infrared curing mechanism 5 inevitably generates vibrations during the lifting process, the above vibrations may be transmitted from the printing platform 3 to the uncured liquid silicone layer of the model, causing the morphology of the liquid silicone layer to change, affecting the printing quality. To this end, this embodiment proposes a targeted infrared curing drive mechanism 6. The infrared curing drive mechanism 6 includes a main swing arm 61, a driving arm 62, a swing arm cylinder 63 and a limiting base 64; a limiting plate 65 is provided on the limiting base 64, and a limiting inclined groove 66 is provided on the limiting plate 65; the upper end of the main swing arm 61 is connected to the top infrared generating mechanism 51, and a pulley 67 is provided at the lower end, and the pulley 67 is located in the limiting inclined groove 66; one end of the driving arm 62 is hinged to the limiting base 64, and the other end is hinged to the main swing arm 61; the swing arm cylinder 63 is provided on the limiting base 64, and the piston rod of the swing arm cylinder 63 is connected to the driving arm 62, which can drive the driving arm 62 to swing up and down. Specifically, the piston rod is connected to the central position of the driving arm 62. When the piston rod is raised or lowered, the driving arm 62 swings up and down. The upper end of the driving arm 62 is connected to the lower third of the main swing arm 61, so that the connection between the main swing arm 61 and the driving arm 62 is raised or lowered along the arc-shaped swing trajectory of the end of the driving arm 62. In conjunction with the sliding of the pulley 67 along the limiting inclined groove 66, the infrared curing mechanism 5 can move quickly between the top of the printing platform 3 and the side of the printing platform 3, and slow down when it is about to reach the predetermined position, thereby reducing the impact of its own inertia on the system, ensuring that the infrared curing mechanism 5 can move back and forth smoothly for a long time, and the active trajectory occupies a small space.

[0045] In order to further utilize the available space of the printing platform 3, the printing platform 3 is provided with an avoidance groove 33, the limiting base 64 is formed by extending downward from the side wall of the avoidance groove 33, and the main swing arm 61 and the driving arm 62 are both arranged in the avoidance groove 33. By utilizing the avoidance groove 33, the driving components such as the main swing arm 61, the driving arm 62 and the swing arm cylinder 63 can be arranged below the printing platform 3, and the infrared curing mechanism 5 can move close to the side of the printing platform 3, occupying less space, shortening the activity trajectory, and reducing the moving time and the acceleration of the moving process.

[0046] Preferably, the limiting inclined groove 66 includes an inclined section 661 which gradually inclines from top to bottom toward the side where the model printing groove 31 is located, and a horizontal section 662 located at the end of the inclined section 661 and extending toward the side where the model printing groove 31 is located; the pulley 67 can slide in the limiting inclined groove 66. It should be noted that the limiting inclined groove 66 has a great influence on the starting and ending positions of the infrared curing mechanism 5. By setting the inclined section 661, the translation rate of the main swing arm 61 can gradually become zero when entering the final position, thereby avoiding the existing rigid limit from causing the infrared curing mechanism 5 to stop suddenly when it reaches the working station and causing the vibration of the entire printer; the horizontal section 662 allows the infrared curing mechanism 5 to smoothly reduce its descending speed when it descends to the standby station, so that the reset process naturally undergoes the process of acceleration and deceleration to stop, and also avoids the occurrence of the infrared curing mechanism 5 stopping suddenly after it reaches the position during the reset process.

[0047] In order to ensure the lifting accuracy of the temperature measuring probe 41, the probe lifting mechanism 42 is a screw module, which drives the screw to rotate through the corresponding motor, drives the nut on the screw to lift, and thus drives the temperature measuring probe 41 to lift. An annular temperature measuring section 411 is provided on the side of the temperature measuring probe 41. The annular temperature measuring section 411 is equal to or slightly larger than the thickness of a layer of liquid silicone, ensuring that the temperature of the printed liquid silicone is not affected by the solidified lower layer of silicone, thereby improving the temperature measurement accuracy.

[0048] Preferably, the infrared curing drive mechanism 6 further includes an auxiliary swing arm 68, the front end of the auxiliary swing arm 68 is connected to the top infrared generating mechanism 51, the rear end of the auxiliary swing arm 68 is connected to the side infrared spot generating mechanism 52, and the auxiliary swing arm 68 is also connected to the main swing arm 61. The side infrared spot generating mechanism 52 is provided with a light slit 521, and an infrared lamp is provided in the light slit 521. The infrared light emitted by the infrared lamp irradiates the corresponding liquid silicone layer from the side of the light slit 521 to assist the top infrared generating mechanism 51 in heating and curing the liquid silicone layer. The top infrared generating mechanism 51 is provided with a lamp that can emit infrared light downward.

[0049] like Figure 4 As shown, the printing platform 3 is provided with a rotation drive mechanism and a tilt drive mechanism, the tilt drive mechanism includes a tilt motor 34 and a tilt seat 35, the rotation drive mechanism includes a rotation motor 36 and a rotation connection seat 37, the tilt motor 34 is placed horizontally and connected to the tilt seat 35; the rotation motor 36 is vertically arranged on the tilt seat 35 and connected to the rotation connection seat 37; the rotation connection seat 37 is connected to the printing platform 3. Figure 5As shown, the front-to-back translation mechanism 12 includes a slide groove 121 arranged on the gantry 11, and the lifting mechanism 13 includes a sliding seat 131 connected to the linear motor. The sliding seat 131 can be lifted and lowered along the lifting mechanism 13 under the drive of the linear motor, and the holding tank 21 is arranged on the sliding seat 131.

[0050] It should be noted that the rotary drive mechanism is used to drive the printing platform 3 to rotate horizontally, and the inclination drive mechanism is used to drive the printing platform 3 to swing at a certain angle; the front and rear translation mechanism 12 is used to drive the printing assembly 2 to move forward and backward, and the gantry 11 itself can move left and right, and cooperate with the lifting mechanism 13, so that the printing assembly 2 can move in a three-dimensional space, and cooperate with the movement of the printing platform 3 to complete the printing of different models.

[0051] Accordingly, the second embodiment of the present invention provides a silicone layer-by-layer curing 3D printing method, including the silicone layer-by-layer curing 3D printer as described above, specifically including the following steps:

[0052] S1, the infrared curing driving mechanism 6 drives the infrared curing mechanism 5 to move to the standby position to avoid obstruction to the movement of the print head 22;

[0053] S2. A pneumatic joint 211 is provided on the top of the holding tank 21. By passing gas into the pneumatic joint 211, the liquid silicone in the holding tank 21 can be sprayed out from the print head 22. In order to control the temperature of the liquid silicone, a heating device can be provided in the holding tank 21. In order to more accurately control the spraying amount of the liquid silicone, a piston can be provided in the holding tank 21. The piston is driven to move by a motor, so that the liquid silicone in the holding tank 21 can be accurately pressed out. Similar to the general 3D printing process, the lifting and translation mechanism 1 drives the print head 22 to move on the printing platform 3 to print a layer of model on the model printing slot 31. However, while printing the required model, it is necessary to print a layer of temperature measurement model of the same height on the temperature measurement model slot 32; the temperature measurement model is only used for temperature control. In order to save printing time, the cross-section of the temperature measurement model is small, generally a square with a side length of one centimeter, or a circle with a diameter of one centimeter;

[0054] S3, the infrared curing driving mechanism 6 drives the infrared curing mechanism 5 to move to the working position, and the top infrared generating mechanism 51 emits infrared rays downward from above the model to heat up the model and the temperature measuring model at the same time;

[0055] S4, the temperature measuring probe 41 detects the temperature of the temperature measuring model in real time. When the temperature of the temperature measuring model reaches a predetermined temperature, the infrared ray of the top infrared generating mechanism 51 is turned off; and the curing temperature is controlled at 80-140°C.

[0056] S5. Repeat steps S1-S5 until the model is printed.

[0057] Preferably, combined Figure 6 As shown, during step S3, the probe lifting mechanism 42 drives the temperature measuring probe 41 to continuously vibrate up and down within a predetermined stroke; an annular temperature measuring section 411 is provided on the side of the temperature measuring probe 41. After the single layer is cured, the probe lifting mechanism 42 drives the temperature measuring probe 41 to lift a predetermined height, so that the annular temperature measuring section 411 is in the uncured model printing layer. By driving the temperature measuring probe 41 to vibrate periodically, it is possible to prevent the silicone from generating excessive friction on the temperature measuring probe 41 after curing, thereby affecting the lifting and lowering of the temperature measuring probe 41. The temperature measuring probe 41 is lifted synchronously with the printing process to ensure that the annular temperature measuring section 411 is in the uncured model printing layer and maintain the temperature measurement of the liquid silicone.

[0058] By adopting the above method, the infrared curing mechanism 5 can move along a predetermined trajectory, leaving space for the printing of the print head 22, so that the layer-by-layer printing and layer-by-layer light curing process can be implemented. The printing platform 3 has a model printing slot 31 and a temperature measurement model slot 32. The print head 22 can print the required silicone model in the model printing slot 31, and print a model for temperature measurement at the same height in the temperature measurement model slot 32. Through the real-time monitoring of the temperature of the temperature measurement model by the temperature measurement probe 41, the current temperature of the liquid silicone layer of the required silicone model can be accurately and quickly obtained. With the high-power infrared equipment, the liquid silicone layer can be quickly heated and the maximum temperature can be controlled to ensure the curing quality and improve the printing efficiency.

[0059] The above is a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A silicone layer-by-layer curing 3D printer, characterized in that: It includes a lifting and translation mechanism, a printing assembly, a printing platform, a temperature measuring mechanism, an infrared curing mechanism and an infrared curing driving mechanism. The printing assembly is arranged on the lifting and translation mechanism, and includes a containing tank and a printing head; The lifting and translation mechanism comprises a gantry, a front-and-rear translation mechanism and a lifting mechanism, wherein the front-and-rear translation mechanism is arranged on the gantry and can translate forward and backward along the gantry, the lifting mechanism is arranged on the front-and-rear translation mechanism, the container is arranged on the lifting mechanism, and the lifting mechanism can drive the container to move up and down; The infrared curing drive mechanism is arranged on one side of the printing platform, and the infrared curing mechanism includes a top infrared generating mechanism. The infrared curing drive mechanism is connected to the infrared curing mechanism and can drive the top infrared generating mechanism to move between a working station located directly above the printing platform and a standby station located on the side of the printing platform; The printing platform has a model printing slot and a temperature measuring model slot, the temperature measuring mechanism includes a temperature measuring probe and a probe lifting mechanism, the probe lifting mechanism is arranged at the bottom of the printing platform, the temperature measuring probe is connected to the probe lifting mechanism, and passes through the printing platform and extends from the surface of the temperature measuring model slot; The temperature measuring probe is used to detect the temperature of the model in contact with it, and the probe lifting mechanism is used to drive the temperature measuring probe to rise and fall; The infrared curing driving mechanism includes a main swing arm, a driving arm, a swing arm cylinder and a limit base; a limit plate is provided on the limit base, and a limit inclined groove is provided on the limit plate; the upper end of the main swing arm is connected to the top infrared generating mechanism, and a pulley is provided at the lower end, and the pulley is located in the limit inclined groove; one end of the driving arm is hinged to the limit base, and the other end is hinged to the main swing arm; the swing arm cylinder is arranged on the limit base, and the piston rod of the swing arm cylinder is connected to the driving arm, which can drive the driving arm to swing up and down.

2. The silicone layer-by-layer curing 3D printer according to claim 1, characterized in that: The printing platform is provided with an avoidance groove, the limiting base is formed by extending downward from the side wall of the avoidance groove, and the main swing arm and the driving arm are both arranged in the avoidance groove.

3. The silicone layer-by-layer curing 3D printer according to claim 2, characterized in that: The limiting inclined groove includes an inclined section which gradually inclines from top to bottom toward the side where the model printing groove is located, and a horizontal section located at the end of the inclined section and continues to extend toward the side where the model printing groove is located; the pulley can slide in the limiting inclined groove.

4. The silicone layer-by-layer curing 3D printer according to claim 1, characterized in that: The probe lifting mechanism is a lead screw module, and a ring-shaped temperature measuring section is provided on the side of the temperature measuring probe.

5. The silicone layer-by-layer curing 3D printer according to any one of claims 1 to 4, characterized in that: The infrared curing drive mechanism also includes an auxiliary swing arm, the front end of which is connected to the top infrared generating mechanism, the rear end of which is connected to the side infrared spot generating mechanism, and the auxiliary swing arm is also connected to the main swing arm.

6. The silicone layer-by-layer curing 3D printer according to any one of claims 1 to 4, characterized in that: The printing platform is provided with a rotation drive mechanism and a tilt drive mechanism, the tilt drive mechanism includes a tilt motor and a tilt seat, the rotation drive mechanism includes a rotation motor and a rotation connection seat, the tilt motor is horizontally placed and connected to the tilt seat; the rotation motor is vertically arranged on the tilt seat and connected to the rotation connection seat; the rotation connection seat is connected to the printing platform.

7. The silicone layer-by-layer curing 3D printer according to claim 1, characterized in that: The front-rear translation mechanism includes a slide groove arranged on the gantry, and the lifting mechanism includes a sliding seat connected to the linear motor. The sliding seat can be lifted and lowered along the lifting mechanism under the drive of the linear motor, and the holding tank is arranged on the sliding seat.

8. A 3D printing method for curing silicone layer by layer, characterized in that: A silicone layer-by-layer curing 3D printer according to any one of claims 1 to 7, comprising the following steps: S1. The infrared curing driving mechanism drives the infrared curing mechanism to move to the standby position to avoid obstruction to the movement of the print head; S2, the lifting and translation mechanism drives the print head to move on the printing platform, prints a layer of model on the model printing slot, and prints a layer of temperature measurement model of the same height on the temperature measurement model slot; S3, the infrared curing driving mechanism drives the infrared curing mechanism to move to the working station, and the top infrared generating mechanism emits infrared rays downward from above the model to heat up the model and the temperature measuring model at the same time; S4, the temperature measuring probe detects the temperature of the temperature measuring model in real time, and when the temperature of the temperature measuring model reaches a predetermined temperature, the infrared ray of the top infrared generating mechanism is turned off; S5. Repeat steps S1-S5 until the model is printed.

9. The silicone layer-by-layer curing 3D printing method according to claim 8, characterized in that: During step S3 of claim 8, the probe lifting mechanism drives the temperature measuring probe to continuously vibrate up and down within a predetermined stroke; an annular temperature measuring section is provided on the side of the temperature measuring probe, and after a single layer of solidification is completed, the probe lifting mechanism drives the temperature measuring probe to rise to a predetermined height, so that the annular temperature measuring section is in the unsolidified model printing layer.

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