Testing device for 3D printing material

Abstract

The invention discloses a testing device for a 3D printing material, belongs to the field of 3D printing, and solves the problem that an existing 3D printing material cannot accurately detect the strength of the material under different cooling durations, the testing device comprises a testing table, a printing assembly and a material receiving plate, the printing assembly is arranged at the top end of the testing table, and the material receiving plate is slidably mounted on the surface of the testing table; according to the device, the extrusion mechanism and the material receiving plate are arranged, materials processed by the printing assembly with alloy powder as the raw material can be received, then the overall weight of the materials is automatically detected, once the weight reaches the threshold value borne by the material receiving plate, the printing gun head stops outputting the materials, and the subsequent material cooling duration is detected; and the material is extruded by the extrusion plate subsequently, and the maximum pressure value before the material is crushed is detected, so that the strength of the material processed by taking the alloy powder as the raw material under the conditions of different cooling durations and uniform weight is detected, and the accuracy of equipment during operation is ensured.

Description

Technical Field

[0001] The invention belongs to the field of 3D printing, and in particular relates to a testing device for 3D printing materials. Background Art

[0002] 3D printing, also known as additive manufacturing technology, is a technology that manufactures physical parts based on three-dimensional CAD data by accumulating materials layer by layer. The historical development of 3D printing technology is a process of continuous progress and expansion, from early rapid prototyping technology to today's widespread application. 3D printing technology is divided into many categories, among which the printing of metals and metal-based mixtures is directed energy deposition. Directed energy deposition is a more complex printing process, usually used to repair or add additional materials to existing components. It can be used for ceramics, polymers, but is usually used for metals and metal-based mixtures, printed in the form of wires or powders.

[0003] Chinese utility model patent CN206862931U discloses a 3D printing consumables temperature characteristics test device, including a torque motor, a controllable heating nozzle, a rubber friction wire feeder, an encoder and a controller; the torque motor output shaft and the encoder shaft are respectively provided with rubber friction wire feeders; the two rubber friction wire feeders are in contact with each other, with the printing consumables filament sandwiched between them; the end of the printing consumables filament is connected to a controllable heating nozzle; the torque motor, the encoder and the controller are connected. The utility model can test the temperature characteristics of different types and batches of consumables, thereby providing intuitive parameter guidance for the setting of printing temperature to improve printing quality;

[0004] The above design detects the temperature characteristics of different types and batches of printing materials through the coordination of multiple groups of components, and can provide intuitive parameter guidance for the use of subsequent components. However, this design has certain problems when used. Specifically, when the equipment is testing alloy powder materials, it cannot flexibly test the hardness of materials piled with alloy powders of different volumes and different cooling times, resulting in the overall detection quality of the equipment being affected. Summary of the invention

[0005] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0006] In order to solve the problems raised in the above background technology, the present invention adopts the following technical solutions.

[0007] A testing device for 3D printed materials comprises a test bench, a printing component and a material receiving plate, wherein a printing component is arranged on the top of the test bench, a material receiving plate is slidably mounted on the surface of the test bench, an extrusion mechanism is fixedly mounted on one side of the surface of the test bench, the extrusion mechanism comprises a protective shell, an extrusion force arm, a pressure sensor and a driving component, the protective shell is fixedly mounted on the upper surface of the test bench, the extrusion force arm is symmetrically slidably mounted on the side of the protective shell, the driving component is fixedly mounted inside the protective shell, an output end of the driving component is fixedly connected to an end of the extrusion force arm, a group of pressure sensors are fixedly mounted on the side of the extrusion force arm, a pushing mechanism is fixedly mounted on the side of the test bench, and an output end of the pushing mechanism is fixedly connected to the side of the material receiving plate.

[0008] As a preferred technical solution of the present invention, the driving assembly includes a movable groove, a bidirectional screw, a guide rod and a movable end. The protective shell is provided with a movable groove, the bidirectional screw is rotatably installed in the movable groove, the guide rod is fixedly installed in the movable groove, the bidirectional screw is parallel to the position of the movable groove, the movable end is symmetrically threadedly installed on the outside of the bidirectional screw, the movable end is slidably connected to the guide rod, and the side of the movable end is fixedly connected to the end of the extrusion force arm.

[0009] As a preferred technical solution of the present invention, the drive assembly also includes a drive motor, which is fixedly installed inside the protective shell, and the output end of the drive motor is fixedly connected to the end of the bidirectional screw rod.

[0010] As a preferred technical solution of the present invention, the pushing mechanism includes a fixed base plate, an electric push rod, a pushing side plate and a fixed frame. The fixed base plate is fixedly installed on the side of the test bench, the electric push rod is fixedly installed on the surface of the fixed base plate, the pushing side plate is fixedly installed on the output end of the electric push rod, the fixed frame is fixedly installed on the side of the pushing side plate, and the fixed frame is fixedly connected to the surface of the receiving plate.

[0011] As a preferred technical solution of the present invention, the material receiving plate includes a sliding bottom plate and a supporting top plate, the sliding bottom plate is slidably mounted on the upper surface of the test bench, and the supporting top plate is slidably mounted inside the sliding bottom plate.

[0012] As a preferred technical solution of the present invention, the receiving plate also includes a spring group and a touch switch. The spring group is symmetrically fixedly installed on the inner wall surface of the sliding bottom plate, and the top end of the spring group is fixedly connected to the bottom end of the supporting top plate. When the supporting top plate moves toward the inside of the sliding bottom plate, the spring group is in a force storage state, and the touch switch is fixedly installed on the inner wall surface of the sliding bottom plate. The touch switch is arranged between the spring groups.

[0013] As a preferred technical solution of the present invention, the receiving plate also includes a timer, and the timer is fixedly mounted on the inner wall of the sliding bottom plate, and the trigger switch is electrically connected to the timer.

[0014] As a preferred technical solution of the present invention, the printing component includes a printing gun head, a processing end and a material input end. The printing gun head is arranged at the top of the test bench, the processing end is fixedly mounted on the connecting end at the top of the printing gun head, and the material input end is arranged on the surface of the printing gun head.

[0015] As a preferred technical solution of the present invention, the printing component also includes a first movable frame, which is arranged at the top of the test bench, and the first movable frame is slidably connected to the print gun head. The print gun head slides along the length extension direction of the first movable frame, and the first movable frame drives the print gun head to move up and down.

[0016] As a preferred technical solution of the present invention, the printing component also includes a second movable frame, which is symmetrically slidably installed on both sides of the test bench. The second movable frame moves along the length extension direction of the test bench itself, and the first movable frame moves up and down along the force arm direction of the second movable frame.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] (1) In the present invention, by setting up an extrusion mechanism and a receiving plate, the printing component can receive the material processed with alloy powder as raw material, and then automatically detect the overall weight of the material. Once the weight reaches the threshold that the receiving plate can bear, the printing gun head will stop outputting the material, and then the cooling time of the material will be detected. The extrusion plate will then extrude the material to detect the maximum pressure value before the material is broken. In this way, the strength of the material processed with alloy powder as raw material under different cooling times and uniform weight can be detected, thereby ensuring the accuracy of the equipment during operation.

[0019] (2) In the present invention, by setting up the printing component and the pushing mechanism, the position of the printing gun head itself can be flexibly adjusted. When the printing gun head is in use, it can output materials of different specifications and shapes, which is convenient for printing different models and structures. In addition, the material plate can be moved as a whole later, and the material can be quickly pushed between the extrusion force arms to undergo hardness testing, thereby ensuring the stability of the equipment during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional diagram of the overall structure of the present invention;

[0021] Figure 2 A three-dimensional diagram of the extrusion mechanism structure of the present invention;

[0022] Figure 3 A three-dimensional diagram of the drive assembly structure of the present invention;

[0023] Figure 4 It is a structural schematic diagram of the driving mechanism in the present invention;

[0024] Figure 5 It is a structural schematic diagram of the material receiving plate in the present invention;

[0025] Figure 6 It is a schematic diagram of the structure of the printing component in the present invention.

[0026] The corresponding relationship between the illustrations and component names in the figure is as follows:

[0027] 1. Test bench; 2. Printing assembly; 21. Print gun head; 22. Processing end; 23. Material input end; 24. First mobile frame; 25. Second mobile frame; 3. Material receiving plate; 31. Sliding bottom plate; 32. Support top plate; 33. Spring group; 34. Touch switch; 35. Timer; 4. Extrusion mechanism; 41. Protective shell; 42. Extrusion force arm; 43. Pressure sensor; 44. Drive assembly; 441. Moving slot; 442. Bidirectional screw rod; 443. Guide rod; 444. Moving end; 445. Drive motor; 5. Pushing mechanism; 51. Fixed bottom plate; 52. Electric push rod; 53. Pushing side plate; 54. Fixed frame. DETAILED DESCRIPTION

[0028] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0029] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0030] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not refer to the same embodiment, nor is it a separate or selective embodiment that is mutually exclusive with other embodiments. The present invention provides the following embodiments.

[0031] Depend on Figure 1 , Figure 2 and Figure 3As shown, a testing device for 3D printing materials includes a test bench 1, a printing component 2 and a material receiving plate 3, the printing component 2 is arranged on the top of the test bench 1, the material receiving plate 3 is slidably installed on the surface of the test bench 1, an extrusion mechanism 4 is fixedly installed on one side of the surface of the test bench 1, the extrusion mechanism 4 includes a protective shell 41, an extrusion force arm 42, a pressure sensor 43 and a driving component 44, the protective shell 41 is fixedly installed on the upper surface of the test bench 1, the extrusion force arm 42 is symmetrically slidably installed on the side of the protective shell 41, the driving component 44 is fixedly installed inside the protective shell 41, the output end of the driving component 44 is fixedly connected to the end of the extrusion force arm 42, one group of the extrusion force arms 42 are fixedly installed on the side, and a pushing mechanism 5 is fixedly installed on the side of the test bench 1, and the output end of the pushing mechanism 5 is fixedly connected to the side of the material receiving plate 3.

[0032] During use, the plastic steel wire material detected during the operation of the equipment is connected to the feed port of the printing component 2, and then the printing component 2 is used to perform operations using the plastic steel wire material to form a certain volume of stacked materials on the surface of the receiving plate 3. At this time, when the stacked materials fall onto the surface of the receiving plate 3 and the materials are stacked to a set threshold, the receiving plate 3 can automatically calculate the cooling time of the upper material, and then the position of the receiving plate 3 itself is pushed by the pushing mechanism 5, and then the stacked materials with different cooling times are squeezed by the extrusion mechanism 4, and the hardness and strength of the stacked materials themselves are detected in real time. When in use, the two sets of extrusion forces are adjusted by the use of the driving component 44. The position of the arm 42 is moved, so that the two groups of extrusion force arms 42 move toward the middle end at the same time, and the material on the surface of the receiving plate 3 and between the extrusion force arms 42 is extruded. During the extrusion process, the pressure sensor 43 contacts the side surface of the material. When the extrusion force does not exceed the material's own bearing capacity, the number detected by the pressure sensor 43 itself will continue to increase until the material is broken under the extrusion of the extrusion force arm 42. At this time, the pressure on the pressure sensor 43 suddenly decreases. The pressure data on the material after cooling for a certain period of time can be determined based on the data between the sudden decreases in the pressure sensor 43 detection data, thereby ensuring the stability and accuracy of the equipment during operation.

[0033] By the attached Figure 3 As shown, in this embodiment, the driving assembly 44 includes a movable groove 441, a bidirectional screw rod 442, a guide rod 443 and a movable end 444. The protective shell 41 is provided with a movable groove 441, the bidirectional screw rod 442 is rotatably installed in the movable groove 441, the guide rod 443 is fixedly installed in the movable groove 441, the bidirectional screw rod 442 is parallel to the movable groove 441, the movable end 444 is symmetrically threadedly installed on the outside of the bidirectional screw rod 442, the movable end 444 is slidably connected to the guide rod 443, and the side of the movable end 444 is fixedly connected to the end of the extrusion force arm 42.

[0034] During use, the two sets of movable ends 444 on the outer surface of the two-way screw rod 442 are driven to move toward the middle end at the same time through the rotation of the two-way screw rod 442. Driven by the movable ends 444, the two sets of extrusion force arms 42 are used to squeeze the material on the surface of the receiving plate 3 and between the extrusion force arms 42 in a clamping manner. The subsequent pressure sensor 43 can detect the hardness of the stacked material under different cooling times based on the change in the extrusion force data. The use of the guide rod 443 makes the movement of the movable end 444 itself more stable. The movable end 444 as a whole moves in a manner parallel to the surface of the protective shell 41, thereby ensuring the accuracy of the movement of the movable end 444 and preventing the movable end 444 from tilting or misaligning during movement, which affects the accuracy of subsequent detection data.

[0035] By the attached Figure 4 As shown, in this embodiment, the driving assembly 44 also includes a driving motor 445 , which is fixedly installed inside the protective shell 41 , and the output end of the driving motor 445 is fixedly connected to the end of the bidirectional screw rod 442 .

[0036] During use, the driving motor 445 is used to provide driving force for the rotation of the bidirectional screw rod 442. When in use, it is necessary to ensure that the output power of the driving motor 445 itself remains consistent at all times, ensure that the subsequent extrusion force of the extrusion force arm 42 itself is uniform, reduce the probability of the detection data being affected by other factors, and ensure the accuracy of the equipment during operation.

[0037] By the attached Figure 4 As shown, in this embodiment, the pushing mechanism 5 includes a fixed base plate 51, an electric push rod 52, a pushing side plate 53 and a fixing frame 54. The fixed base plate 51 is fixedly mounted on the side of the test bench 1, the electric push rod 52 is fixedly mounted on the surface of the fixed base plate 51, the pushing side plate 53 is fixedly mounted on the output end of the electric push rod 52, the fixing frame 54 is fixedly mounted on the side of the pushing side plate 53, and the fixing frame 54 is fixedly connected to the surface of the receiving plate 3.

[0038] During use, the fixed base plate 51 is fixedly installed on the side of the test bench 1, and the lowest position of the electric push rod 52 is parallel to the surface of the test bench 1. Then, through the use of the electric push rod 52, the output end of the electric push rod 52 pushes the position of the pushing side plate 53, and with the cooperation of the fixed frame 54, the receiving plate 3 is driven to slide on the surface of the test bench 1 as a whole. After the material is piled on the surface of the receiving plate 3 and the cooling time reaches the predetermined requirement, the material on the surface of the receiving plate 3 can be pushed between the extrusion force arms 42, so as to facilitate the subsequent extrusion force arms 42 to extrude the material, thereby completing the detection of the strength change of the material itself piled with plastic steel wire under different cooling times.

[0039] By the attached Figure 5 As shown, in this embodiment, the receiving plate 3 includes a sliding bottom plate 31 and a supporting top plate 32 . The sliding bottom plate 31 is slidably mounted on the upper surface of the test bench 1 , and the supporting top plate 32 is slidably mounted inside the sliding bottom plate 31 .

[0040] During use, the support top plate 32 is used to receive the material processed by the printing component 2. As the material on the surface of the receiving plate 3 continues to increase, the support top plate 32 will gradually slide toward the inner wall of the sliding bottom plate 31 until other components inside the receiving plate 3 are triggered, thereby ensuring that the overall volume and weight of the material under different cooling times are uniform each time it is tested, thereby ensuring the accuracy of the test data.

[0041] By the attached Figure 5 As shown, in this embodiment, the receiving plate 3 also includes a spring group 33 and a touch switch 34. The spring group 33 is symmetrically fixedly installed on the inner wall surface of the sliding bottom plate 31, and the top end of the spring group 33 is fixedly connected to the bottom end of the supporting top plate 32. When the supporting top plate 32 moves toward the inside of the sliding bottom plate 31, the spring group 33 is in a force storage state, and the touch switch 34 is fixedly installed on the inner wall surface of the sliding bottom plate 31, and the touch switch 34 is arranged between the spring groups 33.

[0042] During use, the position of the support top plate 32 is supported by the use of the spring group 33. When the weight of the material on the surface of the support top plate 32 exceeds the threshold of the spring group 33 itself, the bottom end of the support top plate 32 will not contact the touch switch 34. Once the material on the surface of the support top plate 32 reaches the threshold, the spring group 33 cannot provide stable support for the support top plate 32. The support top plate 32 falls into the sliding bottom plate 31 under the pressure of the material. At this time, the control button of the touch switch 34 is pressed by the bottom end of the support top plate 32, and the touch switch 34 is triggered. At this time, the printing component 2 stops outputting the material, and the total amount of material on the surface of the support top plate 32 reaches the predetermined value, ensuring that the total amount and volume of the material are consistent when the pressure resistance and hardness are tested subsequently, and the data of the subsequent test is more accurate.

[0043] By the attached Figure 5 As shown, in this embodiment, the receiving plate 3 further includes a timer 35 , and the timer 35 is fixedly mounted on the inner wall of the sliding bottom plate 31 , and the trigger switch 34 is electrically connected to the timer 35 .

[0044] During use, the timer 35 enters the timing state by triggering the touch switch 34, and counts the cooling time of the material on the surface of the support top plate 32. Subsequently, materials with different cooling times can be tested according to the different calculated data of the timer 35, thereby increasing the number of samples and distinguishing the differences between samples, thereby ensuring the accuracy of equipment testing and improving the working quality of the equipment itself.

[0045] By the attached Figure 6As shown, in this embodiment, the printing component 2 includes a printing gun head 21, a processing end 22 and a material input end 23. The printing gun head 21 is arranged at the top of the test bench 1, the processing end 22 is fixedly installed at the connecting end at the top of the printing gun head 21, and the material input end 23 is arranged on the surface of the printing gun head 21.

[0046] During use, the plastic-steel wire material to be tested is connected to the material input end 23, and then the input plastic-steel wire is processed through the use of the printing gun head 21. The connection of the processing end 22 provides energy for the use and operation of the printing gun head 21, and the auxiliary equipment is used stably.

[0047] By the attached Figure 6 As shown, in this embodiment, the printing component 2 also includes a first movable frame 24, which is arranged at the top of the test bench 1, and the first movable frame 24 is slidably connected to the print gun head 21. The print gun head 21 slides along the length extension direction of the first movable frame 24, and the first movable frame 24 drives the print gun head 21 to move up and down.

[0048] During use, through the use of the first movable frame 24, the print gun head 21 can slide left and right along the surface of the first movable frame 24 during operation, and adjust the position of the print gun head 21 itself in real time, providing convenience for subsequent material processing and assisting the precise operation of the print gun head 21.

[0049] By the attached Figure 6 As shown, in this embodiment, the printing component 2 also includes a second movable frame 25, which is symmetrically slidably installed on both sides of the test bench 1. The second movable frame 25 moves along the length extension direction of the test bench 1 itself, and the first movable frame 24 moves up and down along the force arm direction of the second movable frame 25.

[0050] During use, the cooperation of the second movable frame 25 can drive the print gun head 21 to slide along the length direction of the test bench 1, and the cooperation of the first movable frame 24 and the second movable frame 25 can quickly adjust the height of the print gun head 21 itself, making it convenient for the print gun head 21 to process materials of different heights and volumes, thereby expanding the working range of the equipment itself.

[0051] The above content is a further detailed description of the present invention in combination with specific implementation methods. It cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as belonging to the scope of protection determined by the claims submitted for the present invention.

Claims

1. A 3D printing material testing device, comprising a testing table (1), a printing component (2) and a material receiving plate (3), wherein the printing component (2) is arranged on the top of the testing table (1), and the material receiving plate (3) is slidably mounted on the surface of the testing table (1), characterized in that: A squeezing mechanism (4) is fixedly mounted on one side of the surface of the test bench (1), and the squeezing mechanism (4) comprises a protective shell (41), a squeezing force arm (42), a pressure sensor (43) and a driving assembly (44); the protective shell (41) is fixedly mounted on the upper surface of the test bench (1); the squeezing force arm (42) is symmetrically slidably mounted on the side of the protective shell (41); the driving assembly (44) is fixedly mounted inside the protective shell (41); the output end of the driving assembly (44) is fixedly connected to the end of the squeezing force arm (42); one group of squeezing force arms (42) is fixedly mounted on the side of the pressure sensor (43); a pushing mechanism (5) is fixedly mounted on the side of the test bench (1); and the output end of the pushing mechanism (5) is fixedly connected to the side of the material receiving plate (3).

2. The testing device for 3D printing materials according to claim 1, characterized in that: The driving assembly (44) comprises a movable groove (441), a bidirectional screw rod (442), a guide rod (443) and a movable end (444); the movable groove (441) is provided inside the protective shell (41); the bidirectional screw rod (442) is rotatably mounted inside the movable groove (441); the guide rod (443) is fixedly mounted inside the movable groove (441); the bidirectional screw rod (442) is parallel to the movable groove (441); the movable end (444) is symmetrically threadedly mounted outside the bidirectional screw rod (442); the movable end (444) is slidably connected to the guide rod (443); and the side surface of the movable end (444) is fixedly connected to the end of the extrusion force arm (42).

3. The testing device for 3D printing materials according to claim 2, characterized in that: The driving assembly (44) further comprises a driving motor (445), which is fixedly mounted inside the protective shell (41), and an output end of the driving motor (445) is fixedly connected to an end of a bidirectional screw rod (442).

4. The testing device for 3D printing materials according to claim 1, characterized in that: The pushing mechanism (5) comprises a fixed bottom plate (51), an electric push rod (52), a pushing side plate (53) and a fixing frame (54); the fixed bottom plate (51) is fixedly mounted on a side of the test bench (1); the electric push rod (52) is fixedly mounted on a surface of the fixed bottom plate (51); the pushing side plate (53) is fixedly mounted on an output end of the electric push rod (52); the fixing frame (54) is fixedly mounted on a side of the pushing side plate (53); and the fixing frame (54) is fixedly connected to a surface of a receiving plate (3).

5. The testing device for 3D printing materials according to claim 1, characterized in that: The receiving plate (3) comprises a sliding bottom plate (31) and a supporting top plate (32); the sliding bottom plate (31) is slidably mounted on the upper surface of the test bench (1); and the supporting top plate (32) is slidably mounted inside the sliding bottom plate (31).

6. The testing device for 3D printing materials according to claim 5, characterized in that: The receiving plate (3) further comprises a spring group (33) and a touch switch (34); the spring group (33) is symmetrically fixedly mounted on the inner wall surface of the sliding bottom plate (31); the top end of the spring group (33) is fixedly connected to the bottom end of the supporting top plate (32); when the supporting top plate (32) moves toward the inside of the sliding bottom plate (31), the spring group (33) is in a force storage state; the touch switch (34) is fixedly mounted on the inner wall surface of the sliding bottom plate (31); and the touch switch (34) is arranged between the spring groups (33).

7. The testing device for 3D printing materials according to claim 6, characterized in that: The receiving plate (3) further comprises a timer (35), wherein the timer (35) is fixedly mounted on the inner wall of the sliding bottom plate (31), and the touch switch (34) is electrically connected to the timer (35).

8. The testing device for 3D printing materials according to claim 1, characterized in that: The printing assembly (2) comprises a printing gun head (21), a processing end (22) and a material input end (23); the printing gun head (21) is arranged at the top of the test bench (1); the processing end (22) is fixedly mounted on the connecting end at the top of the printing gun head (21); and the material input end (23) is arranged on the surface of the printing gun head (21).

9. The testing device for 3D printing materials according to claim 8, characterized in that: The printing assembly (2) further comprises a first movable frame (24), the first movable frame (24) being arranged at the top of the test bench (1), the first movable frame (24) being slidably connected to the printing gun head (21), the printing gun head (21) sliding along the length extension direction of the first movable frame (24), and the first movable frame (24) driving the printing gun head (21) to move up and down.

10. The testing device for 3D printing materials according to claim 1, characterized in that: The printing assembly (2) further comprises a second movable frame (25), which is symmetrically slidably mounted on both sides of the test bench (1), the second movable frame (25) moves along the length extension direction of the test bench (1), and the first movable frame (24) moves up and down along the force arm direction of the second movable frame (25).

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