Spray head moisturizing device for micro-droplet spray forming sand mold equipment

Abstract

The utility model relates to a spray head moisturizing device for micro-droplet spray molding sand mold equipment. The spray head moisturizing device for the micro-droplet spray forming sand mold equipment comprises a workbench panel and a moisturizing unit. A receding through groove is formed in the workbench panel. The moisturizing unit comprises a mounting frame, a lifting structure, a moisturizing platform, moisturizing cotton and a lifting driving part. And the mounting frame is arranged below the workbench panel. The lifting structure is movably installed on the installation frame. The moisturizing platform is installed on the lifting structure. And the moisturizing cotton is arranged on the moisturizing platform. The lifting driving part is in transmission connection with the lifting structure and used for driving the lifting structure to drive the moisturizing platform to ascend and descend till the moisturizing cotton penetrates through the avoiding through groove to reach the position above the workbench panel or descends to the position below the workbench panel. According to the arrangement of the spray head moisturizing device for the micro-droplet spray forming sand mold equipment, the service life of the moisturizing cotton and the spray head can be prolonged while the moisturizing effect of the spray head is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of 3D printing equipment, in particular to a nozzle moisturizing device for micro-droplet sandblasting forming sand mold equipment. Background Art

[0002] The micro-droplet sandblasting sand mold forming equipment is a universal platform for three-dimensional free-forming (also known as rapid prototyping) that can use raw materials of different properties and forms. It consists of a piezoelectric inkjet print head, a servo-driven workbench, a gantry-type body, and a computer numerical control system. Moisturizing the print head is one of the important tasks in the use of micro-droplet sandblasting sand mold forming equipment.

[0003] In traditional droplet sandblasting sand forming equipment, the moisturizing device is fixedly installed in the designated area of ​​the equipment. When the nozzle needs to be moisturized, the nozzle moves horizontally to the moisturizing cotton to moisturize the nozzle with the moisturizing cotton. In order to ensure the moisturizing effect of the nozzle, the upper surface height of the moisturizing cotton is often higher than the lower end height of the nozzle to ensure that the nozzle can be in close contact with the moisturizing cotton. Therefore, during the horizontal movement of the nozzle, the lower end of the nozzle and the moisturizing cotton are always in a squeezed state, which makes the friction between the nozzle and the moisturizing cotton very large, which will greatly shorten the service life of the moisturizing cotton, and even slightly damage the nozzle to a certain extent. Utility Model Content

[0004] Based on this, it is necessary to provide a nozzle moisturizing device for droplet jet forming sand mold equipment that can effectively prevent the moisturizing cotton and the nozzle from being damaged to varying degrees due to the nozzle directly and hard passing over the moisturizing cotton for a long time, so as to extend the service life of the moisturizing cotton and the nozzle.

[0005] A nozzle moisturizing device for a micro-droplet jetting sand molding device, comprising:

[0006] The workbench panel is formed with an avoidance groove;

[0007] The moisturizing unit comprises a mounting frame, a lifting structure, a moisturizing platform, moisturizing cotton and a lifting drive member; the mounting frame is arranged below the workbench panel; the lifting structure is movably mounted on the mounting frame; the moisturizing platform is mounted on the lifting structure; the moisturizing cotton is placed on the moisturizing platform;

[0008] Among them, the lifting drive is connected to the lifting structure in transmission, and is used to drive the lifting structure to drive the moisturizing platform to rise and fall until the moisturizing cotton passes through the avoidance groove to reach the top of the workbench panel or descends to the bottom of the workbench panel.

[0009] In one of the embodiments, the moisturizing platform is a moisturizing box with an open top; the moisturizing box is used to contain moisturizing liquid and the moisturizing cotton soaked in the moisturizing liquid.

[0010] In one of the embodiments, the mounting frame is provided with a first position sensor and a second position sensor at intervals in the lifting direction of the lifting structure; the first position sensor and the second position sensor are both electrically connected to the lifting drive component and are used to limit the lifting and lowering movement stroke of the lifting structure.

[0011] In one embodiment, the lifting drive component is a driving motor; the moisturizing unit also includes a transmission screw; both ends of the transmission screw are rotatably mounted on the mounting frame, and one end is transmission-connected to the output shaft of the driving motor; a threaded hole matching the transmission screw is formed on the lifting structure; the transmission screw is screwed into the threaded hole.

[0012] In one embodiment, a protection unit is further included; the protection unit includes a first mounting seat, a second mounting seat, a first protection plate, a second protection plate, a protection transmission member and a protection drive member;

[0013] The first mounting seat and the second mounting seat are spaced apart along the first direction; one end of the first protective plate and the second protective plate can be slidably mounted on the first mounting seat, and the other end can be slidably mounted on the second mounting seat; in the lifting direction of the lifting structure, the first protective plate and the second protective plate are located between the workbench panel and the mounting frame;

[0014] The protection drive member is respectively connected to the first protection plate and the second protection plate through the protection transmission member, and is used to drive the first protection plate and the second protection plate to translate in a second direction perpendicular to the first direction in directions toward or away from each other, so as to open or close the avoidance groove.

[0015] In one embodiment, the protection transmission member comprises a first transmission rod, a second transmission rod, two first transmission nuts and two second transmission nuts; the first transmission rod and the second transmission rod are rotatably mounted on the first mounting seat and the second mounting seat respectively; the first transmission rod and the second transmission rod are parallel and spaced apart along the first direction, and both have forward threads and reverse threads;

[0016] The two first transmission nuts are respectively fixed at the two ends of the first protective plate, and are respectively screwed on the positive threads of the first transmission rod and the second transmission rod; the two second transmission nuts are respectively fixed at the two ends of the second protective plate, and are respectively screwed on the reverse threads of the first transmission rod and the second transmission rod; the output shaft of the protective drive member is respectively connected to the first transmission rod and the second transmission rod in terms of transmission.

[0017] In one embodiment, the protective transmission component also includes two first pulleys, a first transmission belt, two second pulleys and a second transmission belt; the two first pulleys are respectively coupled to the output shaft of the protective drive component and the first transmission rod; the first transmission belt is tensioned on the two first pulleys; the two second pulleys are respectively coupled to the first transmission rod and the second transmission rod; the second transmission belt is tensioned on the two second pulleys.

[0018] In one embodiment, the protection unit further includes a first guide rail and a second guide rail; the first guide rail and the second guide rail are respectively fixed on the first mounting seat and the second mounting seat; the first protection plate and the second protection plate are respectively slidably mounted on the first guide rail and the second guide rail.

[0019] In one embodiment, the protection unit also includes a first limit sensor and a second limit sensor; the first limit sensor and the second limit sensor are arranged on the first mounting seat or the second mounting seat at intervals along the opening and closing direction of the first protective plate and the second protective plate; the first limit sensor and the second limit sensor are both electrically connected to the protection drive component, and are used to limit the translational stroke of the first protective plate or the second protective plate.

[0020] The above-mentioned nozzle moisturizing device for droplet jet forming sand mold equipment needs to move the nozzle to the top of the avoidance slot when the nozzle needs to be moisturized, and then use the lifting drive to drive the lifting structure to drive the moisturizing platform to rise until the moisturizing cotton passes through the avoidance slot to the top of the workbench panel and is in close contact with the nozzle. Therefore, during the entire nozzle moisturizing process, there is no mutual friction between the nozzle and the moisturizing cotton, which can ensure that the moisturizing cotton and the nozzle surface are intact and tightly fitted. Therefore, the setting of the above-mentioned nozzle moisturizing device for droplet jet forming sand mold equipment can extend the service life of the moisturizing cotton and the nozzle while ensuring the moisturizing effect of the nozzle. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is an exploded view of a nozzle moisturizing device for a micro-droplet jetting sand mold forming equipment in a preferred embodiment of the utility model;

[0022] Figure 2 for Figure 1 The schematic diagram of the structure of the nozzle moisturizing device for the micro-droplet jetting sand mold forming equipment is in the nozzle moisturizing state;

[0023] Figure 3 for Figure 1 The schematic diagram of the structure of the nozzle moisturizing device for the micro-droplet jetting sand mold forming equipment in a non-working state;

[0024] Figure 4 for Figure 1 The schematic diagram of the structure of the moisturizing unit in the nozzle moisturizing device for the micro-droplet jetting sand mold forming equipment is shown;

[0025] Figure 5 for Figure 1 The figure shows a schematic diagram of the structure of the protection unit in the nozzle moisturizing device for the micro-droplet injection molding sand mold equipment.

[0026] Explanation of reference numerals: 100, nozzle moisturizing device for droplet jetting sand mold forming equipment; 110, workbench panel; 111, avoidance slot; 120, moisturizing unit; 121, mounting frame; 122, lifting structure; 123, moisturizing platform; 124, moisturizing cotton; 125, lifting drive member; 126, first position sensor; 127, second position sensor; 128, transmission screw; 130, protection unit; 131, first mounting seat; 132, second mounting seat; 133, first protection plate; 134, Second protective plate; 135, protective transmission member; 1351, first transmission rod; 1352, second transmission rod; 1353, first transmission nut; 1354, second transmission nut; 1355, first pulley; 1356, first transmission belt; 1357, second pulley; 1358, second transmission belt; 136, protective drive member; 137, first guide rail; 138, second guide rail; 1391, first limit sensor; 1392, second limit sensor; 10, first direction; 20, second direction. DETAILED DESCRIPTION

[0027] In order to facilitate the understanding of the present invention, the present invention will be described more comprehensively with reference to the accompanying drawings. The accompanying drawings provide preferred embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0029] When describing positional relationships, unless otherwise specified, when an element is referred to as being "on" another element, it can be directly on the other element or there can be an intermediate element. It is also understood that when an element is referred to as being "between" two elements, it can be the only one between the two elements, or there can be one or more intermediate elements.

[0030] In the case of using “including”, “having”, and “comprising” described herein, another component may be added unless a clear limiting term such as “only”, “consisting of”, etc. is used. Unless mentioned otherwise, a term in the singular form may include a plural form and should not be understood as being one in number.

[0031] In addition, the drawings are not drawn to a 1:1 scale, and the relative sizes of the elements in the drawings are drawn only as examples and not necessarily according to the true scale.

[0032] See also Figures 1 to 3 The nozzle moisturizing device 100 for the micro-droplet injection molding sand mold equipment in the preferred embodiment of the utility model includes a workbench panel 110 and a moisturizing unit 120.

[0033] The workbench panel 110 is formed with an escape groove 111. In the micro-droplet jetting sand mold forming equipment, the nozzle is located above the workbench panel 110, and parts are formed on the workbench panel 110.

[0034] Please also read Figure 4 The moisturizing unit 120 includes a mounting frame 121, a lifting structure 122, a moisturizing platform 123, moisturizing cotton 124 and a lifting drive 125. The mounting frame 121 is arranged below the workbench panel 110. The lifting structure 122 is movably mounted on the mounting frame 121. The moisturizing platform 123 is mounted on the lifting structure 122. The moisturizing cotton 124 is placed on the moisturizing platform 123. The moisturizing cotton 124 can be placed on the moisturizing platform 123, or can be positioned on the moisturizing platform 123 by bundling, bonding, etc.

[0035] The lifting drive member 125 is connected to the lifting structure 122 and is used to drive the lifting structure 122 to drive the moisturizing platform 123 to rise and fall until the moisturizing cotton 124 passes through the avoidance groove 111 to reach the top of the workbench panel 110 or descends to the bottom of the workbench panel 110.

[0036] In some embodiments, the moisturizing platform 123 is a moisturizing box with an upper opening. The moisturizing box is used to hold moisturizing liquid and moisturizing cotton 124 at least partially soaked in the moisturizing liquid. This ensures that the moisturizing cotton 124 is always kept moist, and further improves the moisturizing effect on the nozzle.

[0037] Of course, in other embodiments, the moisturizing platform 123 may also be a planar structure or other structures, as long as the moisturizing cotton 124 can be stably placed.

[0038] In some embodiments, the mounting frame 121 is provided with a first position sensor 126 and a second position sensor 127 at intervals in the lifting direction of the lifting structure 122. The first position sensor 126 and the second position sensor 127 are both electrically connected to the lifting drive 125 and are used to limit the lifting and moving stroke of the lifting structure 122. This can prevent the lifting structure 122 from driving the moisturizing platform 123 out of range during the lifting process and causing a malfunction.

[0039] Of course, in other embodiments, the first position sensor 126 and the second position sensor 127 may be eliminated, and the lifting drive 125 may be set as a driving motor. By selecting a motor with a torque judgment function to control the rotation range of the motor output shaft, the lifting stroke of the lifting structure 122 may be controlled.

[0040] In some embodiments, the lifting drive member 125 is a driving motor. The moisturizing unit 120 also includes a transmission screw 128. Both ends of the transmission screw 128 are rotatably mounted on the mounting frame 121, and one end is drivingly connected to the output shaft of the driving motor. A threaded hole (not shown) matching the transmission screw 128 is formed on the lifting structure 122. The transmission screw 128 is screwed into the threaded hole.

[0041] In this way, the transmission screw 128 cooperates with the threaded hole on the lifting structure 122 to convert the rotational motion output by the drive motor into the linear operation of the lifting structure 122, and the transmission screw 128 and the lifting structure 122 together constitute a screw mechanism, and the screw mechanism has the advantages of high transmission efficiency and accurate positioning, thereby ensuring that the position height of the moisturizing cotton 124 when it rises to above the workbench panel 110 is accurate and reliable, so as to further reduce the probability of damage to the moisturizing cotton 124 and the nozzle while ensuring the moisturizing effect.

[0042] Please also read Figure 5 In some embodiments, the nozzle moisturizing device 100 for the droplet jetting sand mold forming equipment further includes a protection unit 130. The protection unit 130 includes a first mounting seat 131, a second mounting seat 132, a first protection plate 133, a second protection plate 134, a protection transmission member 135 and a protection driving member 136.

[0043] The first mounting seat 131 and the second mounting seat 132 are spaced apart along the first direction 10. One end of the first protective plate 133 and the second protective plate 134 are slidably mounted on the first mounting seat 131, and the other end of the first protective plate 133 and the second protective plate 134 are slidably mounted on the second mounting seat 132. In the lifting direction of the lifting structure 122, the first protective plate 133 and the second protective plate 134 are located between the workbench panel 110 and the mounting frame 121.

[0044] The protection drive member 136 is respectively connected to the first protection plate 133 and the second protection plate 134 through the protection transmission member 135, and is used to drive the first protection plate 133 and the second protection plate 134 to translate in opposite directions in a second direction 20 perpendicular to the first direction 10 to open or close the avoidance slot 111.

[0045] When the nozzle needs to be moisturized, the protective driving member 136 is used to drive the first protective plate 133 and the second protective plate 134 to move away from each other to open the avoidance slot 111, and then the lifting driving member 125 is used to drive the lifting structure 122 to drive the moisturizing platform 123 to rise until the moisturizing cotton 124 passes through the avoidance slot 111 and reaches the top of the workbench panel 110 to moisturize the nozzle;

[0046] When the moisturizing work of the nozzle is completed, the lifting drive 125 drives the lifting structure 122 to drive the moisturizing platform 123 to descend until the moisturizing platform 123 and the moisturizing cotton 124 thereon are both lowered to below the first protective plate 133 and the second protective plate 134, and then the protective drive 136 is used to drive the first protective plate 133 and the second protective plate 134 to move in a direction approaching each other until the two are closed to close the avoidance groove 111.

[0047] Therefore, the setting of the protection unit 130, while ensuring the normal and smooth operation of the moisturizing unit 120, can also prevent particles, dust, etc. from falling from the avoidance groove 111 into the moisturizing platform 123 during the non-working period of the moisturizing unit 120, thereby contaminating the moisturizing cotton 124, thereby reducing the probability of adverse effects on the nozzle due to contamination of the moisturizing cotton 124.

[0048] Please refer again Figure 1 and Figure 5 Further, in some embodiments, the protection transmission member 135 includes a first transmission rod 1351, a second transmission rod 1352, two first transmission nuts 1353 and two second transmission nuts 1354. The first transmission rod 1351 and the second transmission rod 1352 are rotatably mounted on the first mounting seat 131 and the second mounting seat 132, respectively. The first transmission rod 1351 and the second transmission rod 1352 are arranged in parallel and at intervals along the first direction 10, and both have forward threads and reverse threads.

[0049] The two first transmission nuts 1353 are respectively fixed to the two ends of the first protection plate 133, and are respectively screwed on the positive threads of the first transmission rod 1351 and the second transmission rod 1352. The two second transmission nuts 1354 are respectively fixed to the two ends of the second protection plate 134, and are respectively screwed on the reverse threads of the first transmission rod 1351 and the second transmission rod 1352. The protection drive member 136 is a driving motor, and the output shaft of the protection drive member 136 is respectively connected to the first transmission rod 1351 and the second transmission rod 1352.

[0050] In this way, the first transmission rod 1351 cooperates with the first transmission nut 1353 and the second transmission nut 1354 respectively, and the second transmission rod 1352 cooperates with the first transmission nut 1353 and the second transmission nut 1354 respectively, to form two sets of screw mechanisms, so as to accurately control the opening and closing of the first protective plate 133 and the second protective plate 134 under the driving force provided by the protective drive member 136.

[0051] Further, in some embodiments, the protection drive member 136 is a driving motor. The protection transmission member 135 also includes two first pulleys 1355, a first transmission belt 1356, two second pulleys 1357 and a second transmission belt 1358. The two first pulleys 1355 are respectively coupled to the output shaft of the protection drive member 136 and the first transmission rod 1351. The first transmission belt 1356 is tensioned on the two first pulleys 1355. The two second pulleys 1357 are respectively coupled to the first transmission rod 1351 and the second transmission rod 1352. The second transmission belt 1358 is tensioned on the two second pulleys 1357.

[0052] The two first pulleys 1355 and the first transmission belt 1356 constitute a belt transmission mechanism for transmitting the power of the protection drive member 136 to the first transmission rod 1351, and the second transmission belt 1358 and the two second pulleys 1357 constitute a belt transmission mechanism for transmitting the power on the first transmission rod 1351 to the second transmission rod 1352. In this way, by providing a protection drive member 136, the first protection plate 133 and the second protection plate 134 can be synchronously driven, which not only makes the opening and closing actions of the first protection plate 133 and the second protection plate 134 smoother and more stable, but also makes the structure of the protection unit 130 more compact.

[0053] Furthermore, in some embodiments, the protection unit 130 further includes a first guide rail 137 and a second guide rail 138. The first guide rail 137 and the second guide rail 138 are respectively fixed on the first mounting seat 131 and the second mounting seat 132. The first protection plate 133 and the second protection plate 134 are respectively slidably mounted on the first guide rail 137 and the second guide rail 138.

[0054] The first guide rail 137 and the second guide rail 138 are provided to guide the moving trajectories of the first protective plate 133 and the second protective plate 134 to ensure that the first protective plate 133 and the second protective plate 134 are more closely fitted when they are in the closed state, so as to further improve the sealing effect and sealing reliability of the avoidance groove 111.

[0055] Further, in some embodiments, the protection unit 130 further includes a first limit sensor 1391 and a second limit sensor 1392. The first limit sensor 1391 and the second limit sensor 1392 are arranged on the first mounting seat 131 or the second mounting seat 132 at intervals along the opening and closing direction of the first protection plate 133 and the second protection plate 134. The first limit sensor 1391 and the second limit sensor 1392 are both electrically connected to the protection drive 136 and are used to limit the movement stroke of the first protection plate 133 or the second protection plate 134. In this way, the first protection plate 133 and the second protection plate 134 can be prevented from exceeding the range and causing failure during the translation process.

[0056] Of course, in other embodiments, the first limit sensor 1391 and the second limit sensor can be eliminated, and the protective drive component 136 can be set as a driving motor. By selecting a motor with a torque judgment function to control the rotation range of the motor output shaft, the translation stroke of the first protective plate 133 and the second protective plate 134 can be controlled.

[0057] It should be noted that the first position sensor 126, the second position sensor 127, the first limit sensor 1391 and the second limit sensor 1392 are all position detection components, which can be travel switches, photoelectric sensors, two-dimensional matrix position sensors, electromagnetic sensors, etc.

[0058] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0059] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A nozzle moisturizing device for a droplet jetting sand molding equipment, characterized in that: include: The workbench panel is formed with an avoidance groove; A moisturizing unit, including a mounting frame, a lifting structure, a moisturizing platform, moisturizing cotton and a lifting drive member; The mounting frame is arranged below the workbench panel; the lifting structure is movably mounted on the mounting frame; the moisturizing platform is mounted on the lifting structure; and the moisturizing cotton is placed on the moisturizing platform; Among them, the lifting drive is connected to the lifting structure in transmission, and is used to drive the lifting structure to drive the moisturizing platform to rise and fall until the moisturizing cotton passes through the avoidance groove to reach the top of the workbench panel or descends to the bottom of the workbench panel.

2. The nozzle moisturizing device for droplet jetting sand molding equipment according to claim 1 is characterized in that: The moisturizing platform is a moisturizing box with an opening at the upper end; the moisturizing box is used to contain moisturizing liquid and the moisturizing cotton soaked in the moisturizing liquid.

3. The nozzle moisturizing device for droplet jetting sand molding equipment according to claim 1, characterized in that: The mounting frame is provided with a first position sensor and a second position sensor at intervals in the lifting direction of the lifting structure; the first position sensor and the second position sensor are both electrically connected to the lifting drive component and are used to limit the lifting movement stroke of the lifting structure.

4. The nozzle moisturizing device for droplet jetting sand molding equipment according to claim 1, characterized in that: The lifting drive component is a driving motor; the moisturizing unit also includes a transmission screw; both ends of the transmission screw are rotatably mounted on the mounting frame, and one end is transmission-connected to the output shaft of the driving motor; a threaded hole matching the transmission screw is formed on the lifting structure; the transmission screw is screwed into the threaded hole.

5. The nozzle moisturizing device for droplet jetting sand molding equipment according to claim 1, characterized in that: It also includes a protection unit; the protection unit includes a first mounting seat, a second mounting seat, a first protection plate, a second protection plate, a protection transmission member and a protection drive member; The first mounting seat and the second mounting seat are spaced apart along the first direction; one end of the first protective plate and the second protective plate can be slidably mounted on the first mounting seat, and the other end can be slidably mounted on the second mounting seat; in the lifting direction of the lifting structure, the first protective plate and the second protective plate are located between the workbench panel and the mounting frame; The protection drive member is respectively connected to the first protection plate and the second protection plate through the protection transmission member, and is used to drive the first protection plate and the second protection plate to translate in a second direction perpendicular to the first direction in directions toward or away from each other, so as to open or close the avoidance groove.

6. The nozzle moisturizing device for droplet jetting sand molding equipment according to claim 5, characterized in that: The protection transmission member comprises a first transmission rod, a second transmission rod, two first transmission nuts and two second transmission nuts; the first transmission rod and the second transmission rod are rotatably mounted on the first mounting seat and the second mounting seat respectively; the first transmission rod and the second transmission rod are arranged parallel and spaced along the first direction, and both have forward threads and reverse threads; The two first transmission nuts are respectively fixed at the two ends of the first protective plate, and are respectively screwed on the positive threads of the first transmission rod and the second transmission rod; the two second transmission nuts are respectively fixed at the two ends of the second protective plate, and are respectively screwed on the reverse threads of the first transmission rod and the second transmission rod; the output shaft of the protective drive member is respectively connected to the first transmission rod and the second transmission rod in terms of transmission.

7. The nozzle moisturizing device for droplet jetting sand molding equipment according to claim 6, characterized in that: The protective transmission component also includes two first pulleys, a first transmission belt, two second pulleys and a second transmission belt; the two first pulleys are respectively coupled to the output shaft of the protective drive component and the first transmission rod; the first transmission belt is tensioned on the two first pulleys; the two second pulleys are respectively coupled to the first transmission rod and the second transmission rod; the second transmission belt is tensioned on the two second pulleys.

8. The nozzle moisturizing device for droplet jetting sand molding equipment according to claim 5, characterized in that: The protection unit also includes a first guide rail and a second guide rail; the first guide rail and the second guide rail are respectively fixed on the first mounting seat and the second mounting seat; the first protection plate and the second protection plate are respectively slidably installed on the first guide rail and the second guide rail.

9. The nozzle moisturizing device for droplet jetting sand molding equipment according to claim 5, characterized in that: The protection unit also includes a first limit sensor and a second limit sensor; the first limit sensor and the second limit sensor are arranged on the first mounting seat or the second mounting seat at intervals along the opening and closing direction of the first protective plate and the second protective plate; the first limit sensor and the second limit sensor are both electrically connected to the protection drive component, and are used to limit the translational stroke of the first protective plate or the second protective plate.

Images