Material blocking detection device for 3D printing

Abstract

The invention discloses a material blocking detection device for 3D printing, which comprises a base and a buffer seat, a material disc is placed on a rotating room on the base, meanwhile, the base is also provided with a first control switch, and the material disc is in press fit connection with the control end of the first control switch; a second control switch is arranged on the buffer seat, a trigger assembly is slidably arranged on the buffer seat, and the trigger assembly is used for adjusting the control state of the second control switch; the material blocking detection device further comprises a cut-off module and a controller, the cut-off module is used for cutting off the material wires, the controller enables the first control switch and the second control switch to be connected in series, and the first control switch and the second control switch are electrically connected with the cut-off module. Independent control over the cut-off module is achieved through the first control switch and the second control switch which are arranged in parallel, and as long as material blocking occurs, the cut-off module can be started at the first time to cut off material wires no matter where a material blocking point is located; and the influence of material blocking accidents can be controlled in time.

Description

Technical Field

[0001] The present application relates to the technical field of 3D printing, and in particular to a material jam detection device for 3D printing. Background Art

[0002] When using a fused deposition model 3D printing device for 3D printing, a printing filament loaded by a material tray is usually used. The material tray is a roller with a retaining ring. The printing filament is wound from one retaining ring to the other side and fixed on the roller in a layer-by-layer winding manner. In order to prevent relative movement between the filament and the roller, which causes different layers of filaments to be entangled with each other and cause the filament to be stuck, it is necessary to insert the head of the filament into the fixed hole on the roller and bend it when starting to wind; when the printer feed mechanism rotates to drive the filament, the material tray rotates accordingly to release the filament circle by circle, and the printer works normally.

[0003] Usually, the printer is equipped with a material end detection mechanism located between the material tray and the tool head. When the filament head escapes from the material end detection mechanism, the material end detection will be triggered and the printer will pause printing and wait for new filament to be inserted. However, under some working conditions, the material end detection will not be triggered, resulting in the print head running empty. Summary of the invention

[0004] The main purpose of the present application is to provide a material jam detection device for 3D printing, aiming to solve the defect that the material breaking program cannot be triggered in the prior art.

[0005] This application achieves the above objectives through the following technical solutions:

[0006] A material jam detection device for 3D printing, comprising a base;

[0007] A material tray, the material tray is rotatably placed on the base, the base is further provided with a first control switch, the material tray is press-fitted and connected to a control end of the first control switch, so as to adjust the control state of the first control switch by the gravity of the material tray;

[0008] A buffer seat, on which a second control switch is disposed, and a trigger component is slidably disposed on the buffer seat, and the trigger component is used to adjust a control state of the second control switch;

[0009] A cutting module, wherein the cutting module is used to cut the material wire;

[0010] A controller is provided, wherein the first control switch and the second control switch are connected in series, and the first control switch and the second control switch are electrically connected to the cut-off module respectively.

[0011] Optionally, a first plug-in slot and a second plug-in slot are provided on the base, and a baffle is provided between the first plug-in slot and the second plug-in slot; along the axial direction of the material tray, baffles are provided at both ends of the material tray, one baffle is inserted into the first plug-in slot, and the other baffle is inserted into the second plug-in slot.

[0012] Optionally, a plurality of supporting pulleys for supporting the material tray are disposed in the first plug-in slot and the second plug-in slot.

[0013] Optionally, each of the supporting pulleys is provided with a limiting groove, and the baffle is inserted into the limiting groove.

[0014] Optionally, the first control switch is a micro switch, and the action reed of the first control switch is press-fitted and connected to the baffle.

[0015] Optionally, an adjusting slide hole is provided on the buffer seat, and the trigger assembly includes a slider, which is slidably disposed in the adjusting slide hole, and both the slider and the buffer seat are provided with a threading hole for threading the material wire.

[0016] Optionally, a return spring is further provided in the adjusting slide hole, and limiting posts are provided on the buffer seat and the slide block, and the two ends of the return spring are respectively connected to the two limiting posts by plugging.

[0017] Optionally, the second control switch is a micro switch, a trigger groove is provided on the adjusting slide hole, a thrust surface is provided at an angle on the top of the slider, and the thrust surface extends through the trigger groove; along the sliding direction of the slider, the thrust surface is opposite to the action reed of the second control switch.

[0018] Optionally, the cutting module includes a cutting seat, on which an electromagnet and a sliding rod that cooperate with each other are arranged, and on which a knife seat connected to the sliding rod is slidably arranged, and on which a blade is also arranged.

[0019] Optionally, the controller includes an electrically connected power supply and a capacitor, an electrically controlled switch, a first controlled switch and a second controlled switch are connected in series between the power supply and the capacitor; and the electromagnet is electrically connected to the electrically controlled switch, the first controlled switch and the second controlled switch, respectively.

[0020] Compared with the prior art, this application has the following beneficial effects:

[0021] The present application includes a base and a buffer seat, a material tray is placed in a rotating room on the base, and a first control switch is also arranged on the base, the material tray is press-fitted and connected to the control end of the first control switch, so as to adjust the control state of the control switch by the gravity of the material tray; a second control switch is arranged on the buffer seat, and a trigger component is slidably arranged on the buffer seat, and the trigger component is used to adjust the control state of the second control switch; the material jam detection device also includes a cutting module and a controller, the cutting module is used to cut the material wire, the controller connects the first control switch and the second control switch in series, and the first control switch and the second control switch are electrically connected to the cutting module respectively.

[0022] When in use, the material tray with the filament wound on it is placed on the base, the filament wound on the material tray passes through the buffer seat and the trigger assembly, then passes through the cutting module, and finally is connected to the external printing device; under the action of the gravity of the material tray, the first control switch is in a normally closed state;

[0023] If the filament supply is normal and the end of the filament is separated from the material tray smoothly, during the entire feeding process, the material tray will always ensure that the first control switch is in a closed state, and the system works normally; when the end of the filament cannot be separated from the material tray normally, under the pull of the external printing device, the filament will drive the material tray to separate from the base, thereby releasing the first control switch, and then controlling the cutting module to work and cut off the filament;

[0024] When the wire cannot be released normally and the tray is stuck, the wire will drive the tray to separate from the base, thereby releasing the first control switch, and then controlling the cutting module to cut off the wire;

[0025] When the filament cannot be released normally, the material tray is not stuck, and the filament cannot pass through the buffer seat smoothly, the filament will be stuck with the slider, and then driven by the external printer, the filament will pull the slider to slide, and then push the slider to trigger the second control switch, and then control the cutting module to cut the filament;

[0026] When the filament is separated from the material tray normally, but the filament cannot pass through the buffer seat, the filament will be stuck with the slider, and then driven by the external printer, the filament will pull the slider to slide, and then push the slider to trigger the second control switch, and then control the cutting module to cut the filament;

[0027] Compared with the prior art, the present application realizes independent control of the cutting module by means of a first control switch and a second control switch arranged in parallel. As long as material jamming occurs, no matter the jamming point is on the material tray or the buffer seat, the cutting module can be started at the first moment of material jamming to cut off the material wire; thereby, the impact of the jamming accident can be controlled in time to ensure the safe operation of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A schematic diagram of the structure of a material jam detection device for 3D printing provided in Example 1 of the present application;

[0029] Figure 2 This is the exploded view of the assembly of the base and the tray;

[0030] Figure 3 It is the assembly explosion diagram of the buffer seat and the slider;

[0031] Figure 4 This is a schematic diagram of the assembly of the buffer seat;

[0032] Figure 5 This is the circuit diagram of the controller.

[0033] Figure markings: 1-base, 2-material tray, 3-first control switch, 4-buffer seat, 5-second control switch, 6-baffle, 7-support pulley, 8-limiting groove, 9-adjusting slide hole, 10-slider, 11-through hole, 12-reset spring, 13-limiting column, 14-trigger groove, 15-thrust surface, 16-cutting seat, 17-electromagnet, 18-slide rod, 19-knife seat, 20-blade, 21-power supply, 22-capacitor, 23-electrically controlled switch, 101-first plug-in slot, 102-second plug-in slot.

[0034] The purpose, features and advantages of this application will be further described in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0037] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "robot coordinate system and / or m" as an example, it includes the robot coordinate system scheme, or the m scheme, or the scheme that the robot coordinate system and m satisfy at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0039] Example 1

[0040] Reference Figures 1 to 5 This embodiment is an optional embodiment of the present application, which discloses a material jam detection device for 3D printing, including a base 1 and a material tray 2. The base 1 is a cubic structure as a whole, and a first plugging slot 101 and a second plugging slot 102 are arranged on the top surface of the base 1 in parallel with each other. The first plugging slot 101 and the second plugging slot 102 are arranged along the length direction of the base 1. Along the length direction of the base 1, the first plugging slot 101 and the second plugging slot 102 are arranged on both sides of the base 1;

[0041] A material slot is also provided between the first plugging slot 101 and the second plugging slot 102. Along the length direction of the base 1, the first plugging slot 101, the material slot and the second plugging slot 102 penetrate both ends of the base 1;

[0042] The material tray 2 is an overall cylindrical structure, and baffles 6 are integrally connected to the top and bottom of the material tray 2 along the axial direction of the material tray 2, and the baffles 6 are arranged in a circular structure; one of the baffles 6 is inserted into the first plug-in slot 101, and the other baffle 6 is inserted into the second plug-in slot 102;

[0043] Furthermore, a plurality of support pulleys 7 are disposed in the first plug-in slot 101 and the second plug-in slot 102, and the structures of the support pulleys 7 are completely the same, and a limiting groove 8 is disposed on each of the support pulleys 7;

[0044] It should be noted that at least two support rollers are provided, and along the length direction of the base 1, the center line of the base 1 is taken as the axis, and the support rollers located in the same insertion slot are symmetrically arranged;

[0045] During installation, one baffle plate 6 is inserted into the first insertion slot 101, and the outer circumferential surface of the baffle plate 6 is respectively inserted into each of the limiting slots 8, and the other baffle plate 6 is respectively inserted into each of the supporting rollers in the second insertion slot 102;

[0046] Furthermore, a first control switch 3 is provided in the first plug-in slot 101 or the second plug-in slot 102. The first control switch 3 is preferably a micro switch, and the action spring of the first control switch 3 is pressed and connected to the baffle 6.

[0047] Since the supporting rollers are symmetrically arranged, the supporting forces of the supporting rollers will converge on the axis of the material tray 2, thereby forming a stable support for the material tray 2;

[0048] Secondly, due to the limitation of the limiting groove 8, the material tray 2 will not slide axially during the rotation process, thus avoiding the collision between the material tray 2 and the base 1, and improving the stability of the equipment operation;

[0049] Finally, the above structure ensures that the material tray 2 has its own rotatability. In the vertical upward direction, the material tray 2 is in an unconstrained state. In the vertical downward direction, the gravity of the material tray 2 itself can ensure the stability of its connection with the supporting roller. Therefore, as long as the external force meets the requirements, the material tray 2 can be separated from the base 1 at any time, thereby adjusting the control state of the first control switch 3;

[0050] The above connection method has a simple structure, reliable operation and strong stability.

[0051] Further, the material jam detection device also includes a buffer seat 4, on which a second control switch 5 is provided, the second control switch 5 is preferably a micro switch, and an adjustment slide hole 9 is provided on the buffer seat 4, one end of the adjustment slide hole 9 is integrally provided with a plug, and the other end is open and sealed by a plugged head, and a trigger groove 14 is also provided on the top of the adjustment slide hole 9, and the adjustment slide hole 9 is connected to the external environment through the trigger groove 14;

[0052] A trigger assembly is arranged in the adjusting slide hole 9, and the trigger assembly includes a slider 10 with an overall cylindrical structure, and the slider 10 is slidably arranged in the adjusting slide hole 9; a material penetration hole 11 is arranged along the slider 10 and the buffer seat 4, and the two material penetration holes 11 are coaxial, and the two material penetration holes 11 are coaxial with the slider 10;

[0053] A convex block is also integrally connected to the top of the adjusting slider 10, and the convex block extends from the trigger groove 14 to the outside of the adjusting slide hole 9. The convex block is in a rectangular parallelepiped structure as a whole. Along the axial direction of the slider 10, the end face of the convex block facing the second control switch 5 is tilted to form a thrust surface 15 on the convex block; it should be noted that along the vertical upward direction, the upper side of the thrust surface 15 is tilted toward the side away from the second control switch 5;

[0054] Along the sliding direction of the slider 10, the thrust surface 15 faces the action spring of the second control switch 5; the slider 10 and the plug face facing each other are both provided with a limit column 13, and a return spring 12 is also provided in the adjustment slide hole 9, and the two ends of the return spring 12 are respectively connected with the two limit columns 13; the two penetration holes 11 penetrate the two limit columns 13;

[0055] It should be noted that a through hole is also provided on the plug-in end cap for the adjusting sliding hole 9, the through hole is coaxial with the material penetration hole 11, and the aperture of the through hole is 2-3 times the aperture of the material penetration hole 11;

[0056] Furthermore, a threading tube is provided at one end of the two threading holes away from the limiting column 13;

[0057] Under normal working conditions, the wire will slide quickly in the threading hole. When a part or an end of the wire is bent, the bending will increase the radial projection area of ​​the wire. At this time, along the axial direction of the slider 10, the bent portion of the wire will abut against the end surface of the slider 10, resulting in jamming. The wire in a straight state will pull the slider 10 to slide toward the second control switch 5, thereby gradually changing the control state of the second control switch 5 through the thrust surface 15, and the reset spring 12 will be compressed at the same time. After the wire is cut off, the wire is in a free state, and the reset spring 12 pushes the slider 10 to reset.

[0058] Compared with the prior art, the buffer seat 4 and the slider 10 used in the present application can effectively control the working state of the second control switch 5; secondly, the structure of the above device is relatively simple, which can effectively ensure the stability and reliability of the device while reducing the hardware cost of the device;

[0059] The material jam detection device further comprises a cutting module and a controller, wherein the cutting module comprises a cutting seat 16, the cutting seat 16 is in a U-shaped structure as a whole, an electromagnet 17 and a slide bar 18 cooperating with each other are arranged on the cutting seat 16, a knife seat 19 connected to the slide bar 18 is slidably arranged on the cutting seat 16, and a blade 20 is also arranged on the knife seat 19;

[0060] A threading tube is provided on both legs of the cutting seat 16, and the two threading tubes are coaxial and separated from each other; the blade 20 is inserted into the gap between the two threading tubes;

[0061] The provision of two threading tubes can ensure, on the one hand, that the wire always passes through the cutting module, thereby ensuring the stability and reliability of the connection between the wire and the cutting module; on the other hand, the blade 20 is located in the gap between the two threading tubes, and the wires on both sides of the cutting point can be fixed by the two threading tubes, thereby ensuring the shear force of the blade 20, thereby achieving rapid cutting of the wire.

[0062] The controller includes a power supply 21, a capacitor 22 and a resistor. The positive electrode of the power supply 21 is connected in series with the resistor and then connected to the positive electrode of the capacitor 22. The negative electrode of the capacitor 22 is connected to the negative electrode of the power supply 21.

[0063] At the same time, an electric control switch 23, a first control switch 3 and a second control switch 5 are sequentially connected in series between the resistor and the capacitor 22, wherein the positive pole of the capacitor 22 is connected to the common pin of the electric control switch 23, the normally closed pin of the electric control switch 23 is connected to the common pin of the first control switch 3, the normally open pin of the electric control switch 23 is connected to the positive pole of the electromagnet 17, the normally open pin of the first control switch 3 is connected to the common pin of the second control switch 5, the normally closed pin of the first control switch 3 is connected to the positive pole of the electromagnet 17, the normally closed pin of the second control switch 5 is connected to the positive pole of the power supply 21 via a resistor, the normally open pin of the second control switch 5 is connected to the positive pole of the electromagnet 17, and the negative pole of the capacitor 22 and the negative pole of the electromagnet 17 are connected to the negative pole of the power supply 21; it should be pointed out that the electric control switch 23, the first control switch 3 and the second control switch 5 can exchange positions;

[0064] The negative pole of the electromagnet 17 is connected to the negative pole of the power supply 21;

[0065] In the prior art, the wire is generally coiled on the material tray 2, one end of the wire is straight, and the other end needs to be bent to connect with the fixed hole on the material tray 2. At the same time, due to various reasons, a certain section of the wire may be bent to different degrees. Therefore, in the actual production process, the following working conditions may cause the wire to be stuck: 1. When a roll of wire is consumed, the end of the wire cannot be separated from the fixed hole on the material tray 2; 2. When a roll of wire is consumed, the end of the wire is separated from the material tray 2, but the bending amplitude of the end of the wire is too large, causing the wire to be stuck with other external equipment; 3. The wire is not consumed, but during the rotation of the material tray 2, different layers of wire are entangled with each other, thereby causing the material tray 2 to be stuck and unable to rotate for feeding; 4. The wire is not consumed, but a certain section of the wire is bent, and then stuck with the external equipment;

[0066] When the present application is used, a material tray with a wound material wire is placed on the base, and the material wire wound on the material tray passes through the buffer seat and the trigger assembly and then passes through the cutting module, and finally connected to the external printing device; under the action of the gravity of the material tray, the first control switch is in a normally closed state;

[0067] After the equipment starts normally, the electromagnet is disconnected from the power supply, while the capacitor is connected to the power supply. At this time, the capacitor is in a charging state until it is fully charged.

[0068] When the material is stuck due to the above-mentioned working condition 1, the external printing device will pull the filament. Since the filament cannot be separated from the material tray, the filament in a straightened state will pull the material tray and the base apart. At this time, the control state of the first control switch will change, that is, the first control switch will cut off the connection between the power supply and the capacitor, and connect the capacitor to the electromagnet. At this time, the charged capacitor will discharge to the electromagnet, thereby stimulating the blade to cut the filament;

[0069] When the material is stuck due to the aforementioned working condition 2, the bent end of the wire will first abut against the slider, and the external printing device will pull the wire. The wire in a straightened state will pull the slider to slide in the adjustment slide hole beyond the second control switch, and finally control the second control switch to change the control state through the thrust surface. At this time, the second control switch will cut off the connection between the power supply and the capacitor, and connect the capacitor to the electromagnet. At this time, the charged capacitor will discharge to the electromagnet, thereby stimulating the blade to cut the wire;

[0070] When the material is stuck due to the aforementioned working condition 3, the material tray cannot rotate due to the winding of the filament, and the filament cannot be output normally. The external printing device will pull the filament, and the filament in a straight state will pull the material tray and the base apart. At this time, the control state of the first control switch will change, that is, the first control switch will cut off the connection between the power supply and the capacitor, and connect the capacitor to the electromagnet. At this time, the charged capacitor will discharge to the electromagnet, thereby stimulating the blade to cut the filament;

[0071] When the material is stuck due to the aforementioned working condition 4, the bending part of the wire will be stuck against the slider after the material is discharged, and the wire cannot pass through the buffer seat smoothly. Therefore, under the pulling of the external printing device, the wire from the bending part of the wire to the external printing device will be in a straight state. At this time, the wire will pull the slider to slide in the adjustment slide hole beyond the second control switch, and finally control the second control switch to change the control state through the thrust surface. At this time, the second control switch will cut off the connection between the power supply and the capacitor, and connect the capacitor to the electromagnet. At this time, the charged capacitor will discharge to the electromagnet, thereby stimulating the blade to cut the wire;

[0072] When the wire is cut, the material tray will reset under its own gravity, and the slider will reset under the action of the reset spring. At this time, the control state of the first control switch or the second control switch is also reset; the power supply and the capacitor are reconnected to achieve recharging, and the wire can be manually adjusted and reconnected;

[0073] Through the above analysis, it can be known that no matter what the reason is that the filament is stuck, under the normal working state of the external printing device, the filament between the stuck point and the external printing device will be in a straight state. The present application cleverly uses this section of straightened filament to control the sliding of the material tray or the slider, and then adjusts the control state of the first control switch or the second control switch respectively, switches the connectivity state of the control circuit, and realizes the control of the cutting module. Therefore, compared with the prior art, no matter what working conditions cause the filament to get stuck, the material jam detection device described in the present application can start the cutting module at the first time of the material jam, and then cut the filament; thereby timely controlling the impact of the jamming accident and ensuring the safe operation of the equipment.

[0074] The above are only preferred embodiments of the present application, and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A material jam detection device for 3D printing, characterized in that: comprising a base (1); A material tray (2), the material tray (2) being rotatably placed on the base (1), the base (1) being further provided with a first control switch (3), the material tray (2) being press-fitted and connected to a control end of the first control switch (3), so as to adjust the control state of the first control switch (3) by the gravity of the material tray (2); A buffer seat (4), wherein a second control switch (5) is arranged on the buffer seat (4), and a trigger component is slidably arranged on the buffer seat (4), wherein the trigger component is used to adjust the control state of the second control switch (5); A cutting module, wherein the cutting module is used to cut the material wire; A controller, wherein the first control switch (3) and the second control switch (5) are connected in series, and the first control switch (3) and the second control switch (5) are electrically connected to the cut-off module respectively.

2. A material jam detection device for 3D printing according to claim 1, characterized in that: The base (1) is provided with a first plug-in slot (101) and a second plug-in slot (102); along the axial direction of the material tray (2), baffles (6) are provided at both ends of the material tray (2), one baffle (6) is inserted into the first plug-in slot (101), and the other baffle (6) is inserted into the second plug-in slot (102).

3. A material jam detection device for 3D printing according to claim 2, characterized in that: A plurality of supporting pulleys (7) for supporting the material tray (2) are arranged in the first plug-in slot (101) and the second plug-in slot (102).

4. A material jam detection device for 3D printing according to claim 3, characterized in that: Each of the supporting pulleys (7) is provided with a limiting groove (8), and the baffle (6) is inserted into the limiting groove (8).

5. A material jam detection device for 3D printing according to claim 2 or 4, characterized in that: The first control switch (3) is a micro switch, and the action reed of the first control switch (3) is pressed and connected to the baffle (6).

6. The material jam detection device for 3D printing according to claim 1, characterized in that: The buffer seat (4) is provided with an adjustment sliding hole (9), the trigger assembly comprises a slider (10), the slider (10) is slidably arranged in the adjustment sliding hole (9), and the slider (10) and the buffer seat (4) are both provided with a threading hole (11) for threading a material wire.

7. A material jam detection device for 3D printing according to claim 6, characterized in that: A return spring (12) is also arranged in the adjusting sliding hole (9), and limiting posts (13) are arranged on the buffer seat (4) and the sliding block (10), and the two ends of the return spring (12) are respectively plug-connected with the two limiting posts (13).

8. A material jam detection device for 3D printing according to claim 6 or 7, characterized in that: The second control switch (5) is a micro switch, the adjusting sliding hole (9) is provided with a trigger groove (14), the top of the slider (10) is provided with a thrust surface (15) which is inclined, the thrust surface (15) extends through the trigger groove (14), and along the sliding direction of the slider (10), the thrust surface (15) faces the action reed of the second control switch (5).

9. The material jam detection device for 3D printing according to claim 1, characterized in that: The cutting module comprises a cutting seat (16), on which an electromagnet (17) and a sliding rod (18) cooperating with each other are arranged, and on which a knife seat (19) connected to the sliding rod (18) is slidably arranged, and on which a blade (20) is arranged.

10. The material jam detection device for 3D printing according to claim 1, characterized in that: The controller comprises an electrically connected power supply (21) and a capacitor (22); an electric control switch (23), a first control switch (3) and a second control switch (5) are connected in series between the power supply (21) and the capacitor (22); and the electromagnet (17) is electrically connected to the electric control switch (23), the first control switch (3) and the second control switch (5), respectively.

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