FDM3D printer nozzle mechanism with pricking needles

Abstract

The utility model discloses an FDM3D printer nozzle mechanism with pricking needles. The FDM3D printer nozzle mechanism comprises a nozzle body, the nozzle mechanism main body is used for mounting all parts of the printer nozzle mechanism; the feeding assembly is used for conveying required consumables in the printing process; the cooling assembly is used for taking away heat of the feeding pipe; the heating assembly is used for providing heat for the nozzle; the nozzle melts the consumables into liquid and sprays out the liquid according to a program, and finally a workpiece is formed; the printing substrate is a bearing body of a printing workpiece, and one layer of the printing substrate sinks when one layer of the printing substrate is printed; the nth layer and the (n-1) th layer are sewn together through the pricking needle, so that the connection strength of the nth layer and the (n-1) th layer is greatly improved; and the reciprocating pushing assembly is used for driving the pricking needle to reciprocate up and down. The problems that a printed workpiece is low in Z-direction connection strength and prone to cracking are effectively solved. And the Z-direction strength of the printed workpiece is improved, the application range of the printed workpiece is expanded, and the design difficulty of the 3D printed workpiece is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to 3D printing technical field especially, it is a kind of FDM3D printer nozzle mechanism with lancet. BACKGROUND

[0002] Current FDM3D printer is layer-by-layer printing principle, XY direction fiber interlaced weave, higher intensity.And Z direction has no fiber interlaced, so the intensity is very low, this kind of interlayer low adhesion strength low has been FDM3D printing process a disadvantage and defect, also is FDM3D printing process cannot realize the technical barrier of overall replacement traditional workpiece.

[0003] Due to the above-mentioned defects, FDM3D printing workpiece use range is greatly reduced, can only be used in Z direction intensity requirement very low use scene.At the same time, the design of the printed workpiece also causes certain limitation, can only avoid the problem of low interlayer strength by design, such as increasing the size of part to compensate for the problem of insufficient strength.

[0004] As described above, the principle defect of current FDM3D printer causes a series of problems such as small use range of printed part, large design difficulty of printed part and large size of printed part under the same strength requirement. INVENTION CONTENTS

[0005] The utility model provides a kind of FDM3D printer nozzle mechanism with lancet, the utility model is to provide a kind of function that can be needle-stuck connection current printing layer and previous layer in printing process, to solve the above-mentioned problems.

[0006] A kind of FDM3D printer nozzle mechanism with lancet, comprising;

[0007] Nozzle mechanism main body, for installing the all parts of printer nozzle mechanism;

[0008] Feeding assembly, for printing process conveying required consumables;

[0009] Cooling assembly, for taking away the heat of feed pipe, so that feed pipe temperature is in low temperature state, let consumables enter nozzle smoothly;

[0010] Heating assembly, for providing heat for nozzle, and guaranteeing nozzle temperature in certain threshold range, so as to guarantee that consumables melt smoothly, and then guarantee printing smoothly;

[0011] Nozzle, it is installed in heating assembly heating block bottom end, by melting consumables into liquid, according to certain program, and cool into certain shape feature, finally form workpiece;

[0012] The printing substrate is a carrier of a printed workpiece, and the printing substrate is lowered by one layer after printing one layer.

[0013] The needle is a key part of the mechanism, and functions to penetrate the n-1 layer when the workpiece is printed the n layer, to take part of the n layer material in a molten state into the n-1 layer, and to take the n-1 layer material into the n layer at the moment of retraction of the needle, so that part of the n layer material is embedded into the n-1 layer in a high temperature state, and part of the n-1 layer material is embedded into the n layer, so that the n layer and the n-1 layer are embedded into each other, which is equivalent to sewing the n layer and the n-1 layer together through the needle, so that the connection strength of the n layer and the n-1 layer is greatly increased.

[0014] The reciprocating pushing assembly is used to drive the needle to reciprocate up and down.

[0015] As a further technical scheme of the utility model, the feeding assembly comprises a spring, a pressure roller support, a pressure roller, an extruder motor and a feeding gear:

[0016] The spring is installed on the nozzle mechanism main body, and the spring provides continuous elastic pressure to the pressure roller through the pressure roller support, so that the consumable can be smoothly and effectively fed;

[0017] The pressure roller support is installed on the nozzle mechanism main body, and the pressure roller is installed on the pressure roller support; the pressure roller cooperates with the feeding gear to provide continuous feeding force for the consumable, so as to ensure the printing requirement;

[0018] The extruder motor rotates to drive the feeding gear under the feeding signal sent by the host computer, and then feeds the required consumable for the printing process; the consumable is inserted between the feeding gear and the pressure roller, and the consumable passes through the feeding pipe at the same time.

[0019] As a further technical scheme of the utility model, the cooling assembly comprises:

[0020] The heat dissipation fins are arranged on one side of the feeding pipe, and are used to increase the heat dissipation area;

[0021] The heat dissipation fan is arranged on one side of the heat dissipation fins, and carries away the heat of the feeding pipe through the heat dissipation fan, so that the temperature of the feeding pipe is in a low temperature state, and the consumable can smoothly enter the nozzle.

[0022] As a further technical scheme of the utility model, the heating assembly comprises:

[0023] The heating block provides heat for the nozzle, and the bottom end of the feeding pipe is inserted into the heating block;

[0024] The temperature sensor is used to detect the temperature of the heating block, so that the temperature is kept within a certain threshold range.

[0025] A heating rod is used to heat the heating block so that the temperature of the nozzle reaches the fusible temperature of the consumable.

[0026] As a further technical scheme of the utility model, the reciprocating pushing assembly comprises:

[0027] The needle holder is used for mounting the needle and driving the needle to reciprocate, the pin shaft on the needle holder is used for keeping the needle holder only reciprocate up and down without rotating, and the positioning arm on the needle holder is used for shielding the sensing groove of the photoelectric sensor so as to detect whether the position of the needle is in the upper position (non-piercing) state.

[0028] The needle reset spring is used for providing an upward elastic force to the needle holder so that the needle holder is in the upper position in the non-piercing working condition.

[0029] The cam is installed on the main shaft of the needle motor and is used for converting the rotating motion of the needle motor into the reciprocating motion of the needle, and the needle motor provides power for the high-speed reciprocating motion of the needle.

[0030] The photoelectric sensor is used for detecting the position of the needle holder so as to ensure that the needle is in the upper position in the non-working state.

[0031] The cam controller controls the position of the cam by driving the needle motor, and then controls the motion position of the needle, the signal of whether the needle is in the upper position is detected by the photoelectric sensor and is transmitted to the cam controller.

[0032] The utility model realizes the beneficial effect that:

[0033] The utility model discloses a kind of FDM3D printer nozzle mechanism with needle introduced, effectively solve the problem that printing workpiece Z direction connection strength is low, easy to crack. Increase the Z direction strength of printing workpiece, expand the application range of printing workpiece, reduce the design difficulty of 3D printing piece. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1 It is a kind of FDM3D printer nozzle mechanism structure schematic diagram with needle.

[0035] Figure 2 It is a kind of FDM3D printer nozzle mechanism left view with needle.

[0036] Figure 3 It is a kind of FDM3D printer nozzle mechanism needle upper position overall schematic diagram with needle.

[0037] Figure 4 It is a kind of FDM3D printer nozzle mechanism needle upper position partial schematic diagram with needle.

[0038] Figure 5 It is a kind of FDM3D printer nozzle mechanism with needle needle lower position integral diagram.

[0039] Figure 6 It is a kind of FDM3D printer nozzle mechanism with needle needle lower position integral diagram.

[0040] Figure 7 It is a kind of FDM3D printer nozzle mechanism with needle needle lower position integral diagram.

[0041] Figure mark annotation: 1-spring, 2-pressing wheel support, 3-pressing wheel, 4-consumables, 5-extruder motor, 6-feeding gear, 7-radiating fin, 8-radiating fan, 9-heating block, 10-nozzle, 11-printing base plate, 12-workpiece, 13-needle, 14-temperature sensor, 15-heating rod, 16-needle support, 17-needle reset spring, 18-cam, 19-needle motor, 20-optical sensor, 21-nozzle mechanism main body, 22-cam controller. DETAILED DESCRIPTION

[0042] The technical scheme of the utility model is described in detail below in combination with specific drawings.

[0043] Please refer to Figures 1 to 7 , the utility model embodiment provides a kind of FDM3D printer nozzle mechanism with needle, comprising;

[0044] Nozzle mechanism main body 21, for installing the all parts of printer nozzle mechanism;

[0045] Feeding assembly, for conveying required consumables 4 for printing process;

[0046] The feeding assembly includes spring 1, pressing wheel support 2, pressing wheel 3, extruder motor 5 and feeding gear 6:

[0047] Spring 1, it is installed on nozzle mechanism main body 21, the spring 1 provides continuous elastic pressure to pressing wheel 3 by pressing wheel support 2, so that consumables 4 can be smoothly and effectively fed;

[0048] Pressing wheel support 2, it is installed on nozzle mechanism main body 21, and pressing wheel 3 is installed on pressing wheel support 2, and pressing wheel 3 cooperates with feeding gear 6 to provide continuous feeding force for consumables 4, guarantee printing demand;

[0049] Extruder motor 5, it receives the feeding signal sent by host computer and rotates, drives feeding gear 6, and then conveys required consumables 4 for printing process, the consumables 4 are inserted between the feeding gear 6 and the pressing wheel 3, and the consumables 4 pass through the feeding pipe simultaneously;

[0050] Cooling assembly, for taking away the heat of the feeding pipe, so that the temperature of the feeding pipe is in a low temperature state, and the consumable 4 can smoothly enter the nozzle 10;

[0051] The cooling assembly comprises heat dissipation fins 7 and a heat dissipation fan 8:

[0052] The heat dissipation fins 7 are arranged on one side of the feeding pipe, for increasing the heat dissipation area;

[0053] The heat dissipation fan 8 is arranged on one side of the heat dissipation fins 7, and the heat dissipation fan 8 takes away the heat of the feeding pipe, so that the temperature of the feeding pipe is in a low temperature state, and the consumable 4 can smoothly enter the nozzle 10.

[0054] Heating assembly, for providing heat for the nozzle 10, and ensuring that the temperature of the nozzle is within a certain threshold range, so as to ensure that the consumable 4 melts smoothly, and then ensure that the printing is smooth, and the consumable 4 is a linear consumable special for FDM 3D printers;

[0055] The heating assembly comprises a heating block 9, a temperature sensor 14, a heating rod 15 and a nozzle 10:

[0056] The heating block 9 provides heat for the nozzle 10, and the bottom end of the feeding pipe is inserted into the heating block 9;

[0057] The temperature sensor 14 is used to detect the temperature of the heating block 9, so as to keep the temperature within a certain threshold range;

[0058] The heating rod 15 is used to heat the heating block 9, so that the temperature of the nozzle 10 reaches the meltable temperature of the consumable 4.

[0059] The nozzle 10 is installed at the bottom end of the heating block 9 in the heating assembly, and the nozzle 10 is the last end execution element of the FDM 3D printer, which melts the consumable 4 into a liquid, sprays according to a certain program, and cools into a certain shape of feature, and finally forms a workpiece 12; the workpiece 12 is a designed feature formed by layer-by-layer printing of the nozzle 10;

[0060] The printing substrate 11 is a carrier for printing the workpiece 12, and the printing substrate 11 sinks by one layer after printing one layer;

[0061] The needle 13 is a key part of the mechanism, which functions to penetrate the n-1 layer when the workpiece 12 is printing the n layer, and to bring a part of the n layer in molten state into the n-1 layer, and to bring the material of the n-1 layer into the n layer at the moment of retraction of the needle 13, so that a part of the material of the n layer is embedded into the n-1 layer in high temperature, and a part of the material of the n-1 layer is embedded into the n layer, so that the n layer and the n-1 layer are embedded into each other, which is equivalent to stitching the n layer and the n-1 layer together through the needle 13, so that the connection strength of the n layer and the n-1 layer is greatly increased.

[0062] The reciprocating pushing assembly is used to drive the needle 13 to move up and down reciprocally.

[0063] The reciprocating pushing assembly comprises a needle support 16, a needle return spring 17, a cam 18, a needle motor 19, a photoelectric sensor 20 and a cam controller 22.

[0064] The needle support 16 is used to install the needle 13 and drive the needle 13 to move reciprocally, and the pin shaft on the needle support 16 functions to keep the needle support 16 only moving up and down reciprocally without rotating, and the positioning arm on the needle support functions to shield the sensing groove of the photoelectric sensor 20, so as to detect whether the position of the needle 13 is in the upper position (non-penetrating) state.

[0065] The needle return spring 17 is used to provide an upward elastic force to the needle support 16, so that the needle support 16 is in the upper position in the non-penetrating working condition.

[0066] The cam 18 is installed on the main shaft of the needle motor 19, which functions to convert the rotating movement of the needle motor 19 into the reciprocating movement of the needle 13, and the needle motor 19 provides power for the high-speed reciprocating movement of the needle.

[0067] The photoelectric sensor 20 is used to detect the position of the needle support 16, so as to ensure that the needle 13 is in the upper position in the non-working state.

[0068] The cam controller 22 controls the position of the cam 18 by driving the needle motor 19, so as to control the movement position of the needle 13, and whether the needle 13 is in the upper position is detected by the photoelectric sensor 20 and the signal is transmitted to the cam controller 22.

[0069] Working principle: after the 3D printer starts working, the heating rod 15 starts heating, and the temperature sensor 14 detects that the temperature reaches the liquefaction temperature of the consumable 4, and then the printer starts working, and the extrusion motor 5 drives the feeding gear 6 to send the consumable 4 into the nozzle.

[0070] Since the workpiece 12 is printed to the first layer without the need for the needle 13 to work, at this time, the needle 13 is in the upper position, and the needle motor does not work.

[0071] When the workpiece 12 starts to print the second layer, the cam controller 22 drives the needle motor 19 to start working, and drives the cam 18 to rotate, and then drives the needle support 16 and the needle 13 to reciprocate.

[0072] When the needle 13 moves from the upper position to the lower position, since the second layer of consumables is being sprayed at high temperature at this time, in a molten state, the needle 13 is also in a high temperature state, the needle 13 will bring part of the second layer of the workpiece 12 in the molten state to the first layer of the workpiece, since the molten state consumables have a certain viscosity, the needle 13 will bring part of the first layer of consumables into the second layer while returning from the lower position to the upper position. In this way, the first layer and the second layer will be in a mutually embedded form, like sewing the first layer and the second layer. By analogy, the first layer and the second layer are sewn, the second layer and the third layer are sewn, and the n-1 layer and the n layer are sewn. Thus, the Z-direction bonding strength of the entire printed workpiece 12 is greatly increased.

[0073] The above-mentioned FDM 3D printer nozzle mechanism with a needle effectively solves the problem of low Z-direction connection strength of the printed workpiece and easy cracking. The Z-direction strength of the printed workpiece is increased, the application range of the printed workpiece is expanded, and the design difficulty of the 3D printed part is reduced. It lays a technical foundation for the further industrialization and marketization of the 3D printer.

[0074] It should be noted that in this text, the term "includes" or any other variant thereof is intended to cover non-exclusive inclusion, so that the device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or includes elements inherent to such a device. Without more limitations, the element defined by the sentence "includes a" does not exclude the presence of another identical element in the device including the element.

[0075] The above is only the preferred embodiment of the present application, and does not limit the patent scope of the present application, and any equivalent structural transformation using the content of the present application specification and drawings, or direct or indirect application in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. An FDM 3D printer nozzle mechanism with a lancet needle, characterized in that, Comprise; The nozzle mechanism body is used for installing all parts of the printer nozzle mechanism; The feeding assembly is used for feeding the required consumables for the printing process; The cooling assembly is used for taking away the heat of the feeding pipe, so that the temperature of the feeding pipe is in a low temperature state, and the consumables can smoothly enter the nozzle; The heating assembly is used for providing heat for the nozzle and ensuring that the temperature of the nozzle is within a threshold range, so as to ensure that the consumables melt smoothly, and then ensure that the printing is smooth; The nozzle is installed at the bottom end of the heating block in the heating assembly, and by melting the consumables into liquid, the nozzle is sprayed according to the program to form a workpiece; The printing substrate is a carrier for printing the workpiece, and the printing substrate sinks by one layer after printing one layer; The needle is used to penetrate the n-1 layer when printing the n layer of the workpiece according to the beat, and part of the n layer of the consumables in the melting state is taken into the n-1 layer, and at the same time, the material in the n-1 layer is taken into the n layer at the moment of retraction of the needle, so that part of the material in the n layer is embedded in the n-1 layer in a high temperature state, and part of the material in the n-1 layer is embedded in the n layer, so that the n layer and the n-1 layer generate a mutual embedding mechanism, which is equivalent to stitching the n layer and the n-1 layer together through the needle, so that the connection strength of the n layer and the n-1 layer is greatly increased; The reciprocating pushing assembly is used to drive the needle to move up and down reciprocally.

2. A FDM 3D printer nozzle mechanism with a lancet according to claim 1, characterized in that, The feeding assembly comprises a spring, a pressure roller support, a pressure roller, an extruder motor and a feeding gear: The spring is installed on the nozzle mechanism body, and the spring provides continuous elastic pressure to the pressure roller through the pressure roller support, so that the consumables can be smoothly and effectively fed; The pressure roller support is installed on the nozzle mechanism body, and the pressure roller is installed on the pressure roller support. The pressure roller cooperates with the feeding gear to provide continuous feeding force for the consumables, so as to meet the printing requirements; The extruder motor rotates under the feeding signal sent by the host computer, drives the feeding gear, and then feeds the required consumables for the printing process.

3. A FDM 3D printer nozzle mechanism with a lancet according to claim 1, characterized in that, The cooling assembly comprises: The heat dissipation fins are arranged on one side of the feeding pipe to increase the heat dissipation area; The heat dissipation fan is arranged on one side of the heat dissipation fins, and the heat dissipation fan takes away the heat of the feeding pipe, so that the temperature of the feeding pipe is in a low temperature state, and the consumables can smoothly enter the nozzle.

4. The FDM 3D printer nozzle mechanism with a lancet needle according to claim 1, characterized in that, The heating assembly comprises: The heating block provides heat for the nozzle, and the bottom end of the feeding pipe is inserted into the heating block; The temperature sensor is used to detect the temperature of the heating block, so that the temperature is kept within a threshold range; The heating rod is used to heat the heating block, so that the temperature of the nozzle reaches the fusible temperature of the consumables.

5. A FDM 3D printer nozzle mechanism with a lancet needle according to claim 1, characterized in that, The reciprocating pushing assembly comprises: The needle support is used to install the needle and drive the needle to move reciprocally. The pin shaft on the needle support is used to keep the needle support only moving up and down reciprocally without rotating, and the positioning arm on the needle support is used to block the sensing groove of the photoelectric sensor, so as to detect whether the position of the needle is in the upper position; The needle reset spring is used to provide an upward elastic force to the needle support, so that the needle support is in the upper position in the non-penetrating working condition; A cam is installed on the main shaft of the needle motor, which converts the rotary motion of the needle motor into reciprocating motion of the needle, and the needle motor provides power for the high-speed reciprocating motion of the needle; A photoelectric sensor is used to detect the position of the needle holder, which ensures that the needle is in the upper position in the non-working state; A cam controller controls the position of the cam by driving the needle motor, thereby controlling the movement position of the needle. The signal of whether the needle is in the upper position is detected by the photoelectric sensor and transmitted to the cam controller.

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