Industrial mold 3D printer nozzle with positioning device

Abstract

The invention relates to the technical field of 3D printing, in particular to an industrial mold 3D printer nozzle with a positioning device. The nozzle comprises a throat pipe, a nozzle and a mounting plate, and further comprises a calibration piece located below the initial position of the nozzle. The throat pipe is communicated with the nozzle, a heat dissipation element is arranged at the throat pipe, and a heating element is arranged at the nozzle; the mounting plate is at least provided with two connecting parts, one connecting part is in sliding connection with the throat pipe, and the other connecting part is fixedly connected with the driving equipment; according to the industrial mold 3D printer nozzle with the positioning device, the nozzle body and the driving equipment are arranged to be in sliding connection, the calibration piece corresponding to the nozzle body is arranged at the initial position of the nozzle body, and the initial position of the nozzle body is adjusted through the calibration piece; and then the nozzle and the driving equipment are switched to be in a fixed state through heat of the heating element, so that automatic adjustment of the position of the nozzle is completed.

Description

Technical Field

[0001] The present invention relates to the technical field of 3D printing, and more specifically, to a nozzle of an industrial mold 3D printer with a positioning device. Background Art

[0002] 3D printing is a process in which materials or energy are transferred to a forming platform in the form of extrusion, spraying, or emission through a specific nozzle along a predetermined trajectory, and a three-dimensional model is finally obtained through layer-by-layer accumulation. Common 3D printing materials include thermoplastic materials such as ABS and PLA. The materials are heated and melted in the nozzle, and the nozzle moves along the cross-sectional contour of the part and the filling trajectory, while extruding the melted materials, depositing them on the printing platform or the previously cured materials of the previous layer. After the temperature is lower than the curing temperature, it starts to cure, and the final product is formed through the layer-by-layer stacking of the materials. The printed products can be used in the industrial field, for example, by 3D printing an industrial mold.

[0003] Before printing a product, it is necessary to position the initial position of the nozzle. There are currently two positioning methods. One is automatic positioning based on sensors, and the other is manual positioning based on manual labor. The positioning speed of the sensor is fast, but there are certain limitations. For example, when printing some materials that require a relatively high temperature to melt (such as PEEK materials), in order to avoid large temperature differences and sudden drops in temperature after the forming materials are extruded, which may cause defects such as cracking and thermal deformation in the formed materials after molding, the temperature of the extrusion nozzle generally needs to be set at about 400 degrees. At the same time, the temperature of the printing forming chamber also needs to be set at about 200 degrees. Inside the extrusion nozzle and the forming chamber at such high temperatures, it is easy to affect the sensor.

[0004] Although manual labor is not affected by temperature, when a 3D printer is used in the industrial field (such as printing product molds), in order to achieve continuous and uninterrupted processing, the 3D printer needs to continuously print, and multiple 3D printing devices will be set up in the workshop. Due to the large number of 3D printing devices, manually positioning each 3D printer by manual labor at this time will affect production efficiency. Summary of the Invention

[0005] The purpose of the present invention is to provide a nozzle of an industrial mold 3D printer with a positioning device to solve the problems raised in the above background art.

[0006] To achieve the above purpose, a nozzle of an industrial mold 3D printer with a positioning device is provided, which includes a throat, a nozzle, and a mounting plate, and further includes a calibration member located below the initial position of the nozzle; the throat and the nozzle are in communication, and a heat dissipation element is provided at the throat, and a heating element is provided at the nozzle;

[0007] The mounting plate has at least two connecting parts, one of which is slidably connected to the throat pipe, and the other is fixedly connected to the driving device;

[0008] The calibration part is used to guide the position of the nozzle during the downward movement of the nozzle head, so as to adjust the positional relationship between the mounting plate and the nozzle through the throat pipe;

[0009] A locking part is arranged at the heating element. When the heating element is heating, the locking part uses the acting force of thermal expansion to switch the connection state between the throat pipe and the mounting plate from a sliding connection state to a fixed connection state, so as to fix the position of the adjusted nozzle.

[0010] As a further improvement of the technical solution, the top end of the locking part extends to the bottom of the top end of the mounting plate. When the locking part generates thermal expansion, it switches the connection state between the throat pipe and the mounting plate from a sliding connection state to a fixed connection state by abutting against the mounting plate.

[0011] As a further improvement of the technical solution, one end of the mounting plate is parallel to the top end of the throat pipe to achieve the sliding connection between the mounting plate and the throat pipe, and the other end is fixedly connected to the driving device.

[0012] As a further improvement of the technical solution, a vertically penetrating through-hole is arranged at the top end of the mounting plate, and the top end of the mounting plate is set as a hollow structure, so that a sliding cavity communicating with the side wall of the through-hole is formed inside the top end of the mounting plate;

[0013] The top end of the throat pipe penetrates from the bottom of the through-hole to the middle of the through-hole, expands outwards, and then enters the sliding cavity through the side wall of the through-hole;

[0014] The diameter of the throat pipe is smaller than the diameter of the through-hole.

[0015] As a further improvement of the technical solution, the calibration part has a "bowl" - shaped structure with a thick top opening and a thin bottom, and the radian of the inner wall of the calibration part corresponds to the radian of the outer circle of the nozzle;

[0016] The calibration part is fixedly arranged on the top of the forming platform and is located at the initial position of the nozzle. The initial position is the position where the nozzle head needs to be reset after each printing work is completed.

[0017] As a further improvement of the technical solution, the locking part includes a top rod with a bottom end fixedly contacting the heating element and a top end extending to the bottom of the top end of the mounting plate, and a gap is arranged between the top end of the top rod and the bottom of the top end of the mounting plate;

[0018] When the heat of the heating element is transferred to the top rod, the top rod expands thermally and its volume becomes larger, and it abuts against the bottom of the top end of the mounting plate.

[0019] As a further improvement of the technical solution, the elongation length of the ejector rod after thermal expansion is greater than the gap between the ejector rod and the mounting plate.

[0020] As a further improvement of the technical solution, the heating element includes a heat conducting block and a heat rod inserted into the heat conducting block for transferring heat to the nozzle through the heat conducting block;

[0021] Both the throat pipe and the nozzle are vertically arranged. The bottom end of the throat pipe abuts against the top end of the nozzle, and the abutting part is connected through a heat conducting block.

[0022] As a further improvement of the technical solution, the locking component further includes a temperature-sensitive driving element arranged at the bottom end of the ejector rod, and the temperature-sensitive driving element uses the heat of the heating element to drive the ejector rod to abut against the mounting plate.

[0023] As a further improvement of the technical solution, the temperature-sensitive driving element is a bimetallic strip located at the bottom end of the ejector rod. The bimetallic strip is fixedly contacted with the heating element. When the heating element is heated, the bimetallic strip pushes the ejector rod to abut against the mounting plate by upward deformation;

[0024] A limiting tube slidably connected to the ejector rod is sleeved outside the ejector rod, and the limiting tube is connected to the heating element or the heat dissipation element.

[0025] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0026] 1. In the industrial mold 3D printer nozzle with a positioning device, the nozzle is set to be slidably connected with the driving device, and a calibration part corresponding to the nozzle is set at the initial position of the nozzle. The calibration part is used to adjust the initial position of the nozzle, and then the heat of the heating element is used to switch the connection between the nozzle and the driving device to a fixed state, thereby completing the automatic adjustment of the nozzle position.

[0027] 2. In the industrial mold 3D printer nozzle with a positioning device, the throat pipe slides on the top end of the mounting plate to change its position, which plays an auxiliary role for the staff. The staff can judge whether the nozzle is at the initial position by observing whether the throat pipe generates displacement, so that the staff can quickly find the nozzle with position deviation among multiple 3D printers, thereby improving the adjustment efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0029] Figure 2 is a schematic diagram of the structure of the nozzle of the present invention;

[0030] Figure 3 is a schematic diagram of the structure of the mounting plate of the present inventionFigure 1 ;

[0031] Figure 4 Structural schematic of the mounting plate of the present invention Figure 2 ;

[0032] Figure 5 Structural schematic diagram of the calibration part of the present invention;

[0033] Figure 6 Schematic diagram of the position state of the nozzle of the present invention Figure 1 ;

[0034] Figure 7 Schematic diagram of the position state of the nozzle of the present invention Figure 2 ;

[0035] Figure 8 Structural schematic diagram of the temperature-sensitive driving element of the present invention;

[0036] Figure 9 Structural schematic of the material pushing mechanism of the present invention Figure 1 ;

[0037] Figure 10 Structural schematic of the material pushing mechanism of the present invention Figure 2 。

[0038] The meanings of each label in the figure are as follows:

[0039] 100, throat; 101, nozzle; 102, convex ring; 110, heating element; 111, heat conducting block; 112, heat rod; 113, sensor; 120, heat dissipating element; 121, heat sink; 122, fan; 130, mounting plate; 131, through port; 132, sliding cavity; 140, locking part; 141, ejector rod; 142, heat insulating tube; 143, limiting tube; 144, bimetallic strip; 150, material pushing mechanism; 151, wire; 152, wire conduit; 200, forming platform; 201, calibration part. Detailed implementation manners

[0040] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0041] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present invention.

[0042] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, the meaning of "a plurality" is two or more, unless otherwise specifically defined.

[0043] As Figure 1 shown, the present invention provides an industrial mold 3D printer nozzle with a positioning device. The nozzle includes a throat 100, a nozzle 101, a mounting plate 130, and a calibration member 201 located below the initial position of the nozzle; the throat 100 and the nozzle 101 are in communication, and a heating element 110 is provided at the nozzle 101 to melt the wire 151 at the nozzle 101 so that the melted wire 151 is ejected through the nozzle 101; a heat dissipation element 120 is provided at the throat 100 to prevent the wire 151 at the throat 100 from melting; the mounting plate 130 has at least two connecting parts, one of the connecting parts is slidably connected to the throat 100, and the other connecting part is fixedly connected to the driving device.

[0044] It should be understood that the driving device mentioned above refers to a driving device that can drive the nozzle of the present invention to move in the X-axis, Y-axis, and Z-axis directions. The driving device is connected to the throat 100 through the mounting plate 130.

[0045] As Figure 2 shown, both the throat 100 and the nozzle 101 are vertically arranged. The bottom end of the throat 100 abuts against the top end of the nozzle 101, and the abutting part is sealed by the heating element 110 to achieve the communication between the two. Specifically, the heating element 110 includes a heat conducting block 111 made of a metal material, and a heat rod 112 inserted into the heat conducting block 111 to transfer heat to the nozzle 101 through the heat conducting block 111. To achieve controllable heating temperature, a sensor 113 is also embedded in the heat conducting block 111 to adjust the heating temperature of the heat rod 112.

[0046] During specific implementation, a vertical through groove is formed at the top of the heat conduction block 111. A threaded groove is provided in the through groove, and threads are provided on the outer circumference of the bottom end of the throat tube 100 and the outer circumference of the top end of the nozzle 101. In this way, the bottom end of the heating element 110 is screwed into the top end of the through groove, and the top end of the nozzle 101 is screwed into the bottom end of the through groove. After tightening, the top end of the nozzle 101 abuts against the bottom end of the throat tube 100, and at this time, the two are in communication. When the wire 151 is inserted into the throat tube 100, the wire 151 can also be inserted into the nozzle 101, and then wait for the heating of the heating rod 112. After melting, it can be extruded through the nozzle 101.

[0047] The heat dissipation element 120 is mainly composed of a heat sink 121 and a fan 122. The heat sink 121 is arranged around the throat tube 100, and the fan 122 is usually installed around the heat sink 121 to help the heat sink 121 dissipate heat and maintain a low temperature. The heat sink 121 is preferably made of aluminum material, and aluminum has good thermal conductivity and can dissipate heat faster. The purpose of such a setting is that if the temperature of the throat tube 100 is too high, the wire 151 will start to melt before reaching the heat conduction block 111, which will cause blockage. For example, the PLA material will become soft at high temperatures. If the throat tube 100 is not cooled enough, the wire 151 may expand and get stuck in the throat tube 100, affecting the feeding and even causing printing failure.

[0048] As Figure 2 shown, the mounting plate 130 is in a plate-like structure. One end of the mounting plate 130 is parallel to the top end of the throat tube 100 for sliding connection with the throat tube 100, and the other end is not limited as long as it can be fixedly connected to the driving device; the two ends of the mounting plate 130 correspond to two connecting parts, that is, one end of the mounting plate 130 is one connecting part and the other end is the other connecting part. For the convenience of description, the mounting plate 130 is set as an "L" shape in this embodiment.

[0049] Combined with Figure 3 , during specific implementation, a vertically through port 131 is formed at the top end of the mounting plate 130, and the top end of the mounting plate 130 is set as a hollow structure so that a sliding cavity 132 communicating with the side wall of the through port 131 is formed inside the top end of the mounting plate 130. Then, the top end of the throat tube 100 is inserted from the bottom of the through port 131 to the middle and expands outward, and then enters the sliding cavity 132 through the side wall of the through port 131. For the convenience of understanding, the expanded part is represented by a convex ring 102. The diameter of the convex ring 102 is larger than the diameter of the throat tube 100, and the diameter of the throat tube 100 is smaller than the diameter of the through port 131. At this time, as Figure 4 shown, since the diameter of the through port 131 is large and cannot block the throat tube 100, the throat tube 100 can slide in multiple directions through the convex ring 102.

[0050] The calibration part 201 is used to guide the position of the nozzle 101 during the downward movement of the nozzle head, so that the nozzle 101 adjusts the positional relationship with the mounting plate 130 through the throat pipe 100. The position of the nozzle 101 is positioned and guided by the calibration part 201, and then the calibration and positioning of the initial position of the calibration part 201 are completed.

[0051] Specifically, the calibration part 201 is fixedly arranged on the top of the forming platform 200 and is located at the initial position of the nozzle 101. The so-called initial position refers to the position where the nozzle head needs to be reset after each printing operation. The initial position should preferably be selected at the corner part of the forming platform 200, and specifically, reference can be made to Figure 1 the position of the calibration part 201 in [reference], so that the calibration part 201 arranged in this way will not affect the printed product. As Figure 5 shown, the calibration part 201 is integrally in a "bowl" shape with a thick top opening and a thin bottom, and the radian of the inner wall of the calibration part 201 corresponds to the radian of the outer circle of the nozzle 101.

[0052] A locking part 140 is arranged on the top of the heat conducting block 111. When the heat conducting block 111 is heated, the locking part 140 uses the acting force of thermal expansion to switch the connection state between the throat pipe 100 and the mounting plate 130 from a sliding connection state to a fixed connection state, so as to fix the position of the adjusted nozzle 101.

[0053] In this embodiment, the top end of the locking part 140 extends to the bottom of the top end of the mounting plate 130, so that when the locking part 140 generates thermal expansion, the connection state between the throat pipe 100 and the mounting plate 130 is switched from a sliding connection state to a fixed connection state by abutting against the mounting plate 130.

[0054] Specifically, the locking part 140 includes a top rod 141 with the bottom end arranged on the top of the heat conducting block 111 and the top end extending to the bottom of the top end of the mounting plate 130. During specific implementation, as Figure 4 shown, by arranging a screw rod at the bottom end of the top rod 141 and screwing the screw rod into the heat conducting block 111. At this time, under normal conditions, a gap is arranged between the top end of the top rod 141 and the bottom of the top end of the mounting plate 130 to avoid affecting the sliding of the throat pipe 100; when the heat conducting block 111 generates heat, the heat of the heat conducting block 111 is transferred to the top rod 141, and the volume of the top rod 141 becomes larger after thermal expansion. At this time, the extended length of the top rod 141 is greater than the gap between the top rod 141 and the mounting plate 130, so as to abut against the bottom of the top end of the mounting plate 130.

[0055] It should be noted that some structures or materials for increasing friction can be arranged at the top end of the top rod 141 and the bottom of the top end of the mounting plate 130. For example, the top end of the top rod 141 is arranged in a conical shape, and a plurality of card slots are arranged at the bottom of the top end of the mounting plate 130, and the stable fixation of the throat pipe 100 is realized by clamping the pointed part of the cone into the card slots.

[0056] When facing some nozzles with a relatively compact structure, a part of the ejector rod 141 may be around the heat sink 121, affecting the heating temperature of the ejector rod 141. Therefore, a heat insulation tube 142 can be sleeved outside the ejector rod 141. The ejector rod 141 can be installed on the top of the heat conducting block 111, and the heat insulation tube 142 is used to block the wind of the fan 122 to reduce the heat loss of the ejector rod 141. At the same time, the inner diameter of the heat insulation tube 142 is larger than the inner diameter of the ejector rod 141 to avoid affecting the thermal expansion of the ejector rod 141.

[0057] Working principle:

[0058] Control the nozzle of the completed printing to move to the initial position, that is, above the calibration part 201. Then wait for the heat conducting block 111 to cool down (after the printing is completed, the heating rod 112 does not need to be heated, and at this time the heat conducting block 111 starts to cool down). After the heat conducting block 111 cools down, at this time the ejector rod 141 cools down and shrinks to the state before expansion, that is, there is a gap between the top of the ejector rod 141 and the bottom of the top of the mounting plate 130. At this time, the throat tube 100 and the top of the mounting plate 130 are in a sliding connection state.

[0059] When positioning, first control the nozzle 101 to move down by the driving device. At this time, as Figure 5 shown, if the center line of the nozzle 101 ( Figure 5 the dotted line in) coincides with the calibration part 201, it means that the nozzle 101 is in the initial position and does not need to be calibrated. Then as Figure 6 shown, if the center line of the nozzle 101 ( Figure 6 the dotted line in) does not coincide with the calibration part 201, it means that the nozzle 101 is not in the initial position and the position of the nozzle 101 needs to be calibrated.

[0060] Next, the nozzle of the present invention has the following two positioning methods:

[0061] The first positioning method: The driving device is used to control the nozzle 101 to move downward. The arc surface of the outer ring of the nozzle 101 contacts the arc surface of the calibration part 201. At this time, the calibration part 201 guides the nozzle 101 through the arc surface to guide the nozzle 101 into the calibration part 201 (i.e., the initial position). During the guiding process, the nozzle 101 drives the throat pipe 100 through the heat conduction block 111, and the throat pipe 100 slides on the top end of the mounting plate 130 to change its position. When the position of the throat pipe 100 changes, it indicates that the nozzle is not in the initial position. Then, the staff can adjust the accuracy (such as the X-axis and Y-axis) of the driving device corresponding to the nozzle. During the adjustment process, due to the sliding relationship between the throat pipe 100 and the mounting plate 130, and the nozzle 101 is located within the calibration part 201, the nozzle 101 and the throat pipe 100 will not move. After the driving device completes the adjustment, at this time, the heat conduction block 111 is heated by the heat rod 112, so that the top end of the ejector rod 141 generates thermal expansion and abuts against the top end of the mounting plate 130. At this time, due to the frictional force between the ejector rod 141 and the mounting plate 130, the throat pipe 100 and the mounting plate 130 cannot slide, thus achieving fixation.

[0062] In the first positioning method, the sliding of the throat pipe 100 on the top end of the mounting plate 130 to change its position plays an auxiliary role for the staff, enabling the staff to judge whether the nozzle is in the initial position by observing whether the throat pipe 100 generates displacement. Furthermore, the staff can quickly identify the nozzles with position deviations among multiple 3D printers, so as to improve the adjustment efficiency.

[0063] The second positioning method: The driving device is used to control the nozzle 101 to move downward. The arc surface of the outer ring of the nozzle 101 contacts the arc surface of the calibration part 201. At this time, the calibration part 201 guides the nozzle 101 through the arc surface to guide the nozzle 101 into the calibration part 201 (i.e., the initial position). During the guiding process, the nozzle 101 drives the throat pipe 100 through the heat conduction block 111, and the throat pipe 100 slides on the top end of the mounting plate 130 to change its position. After the position adjustment is completed, the heat conduction block 111 is heated by the heat rod 112, so that the top end of the ejector rod 141 generates thermal expansion and abuts against the top end of the mounting plate 130. At this time, due to the frictional force between the ejector rod 141 and the mounting plate 130, the throat pipe 100 and the mounting plate 130 cannot slide, thus achieving fixation.

[0064] In the second positioning method, by setting the sliding connection between the nozzle and the driving device, and setting a calibration part 201 corresponding to the nozzle at the initial position of the nozzle, the calibration part 201 is used to adjust the initial position of the nozzle, and then the heat of the heating element 110 is used to switch the connection between the nozzle and the driving device to a fixed state, thereby completing the automatic adjustment of the nozzle position.

[0065] Moreover, the locking component 140 further includes a temperature-sensitive driving element disposed at the bottom end of the ejector rod 141. The temperature-sensitive driving element drives the ejector rod 141 to abut against the mounting plate 130 by using the heat of the heat conducting block 111.

[0066] As Figure 8 shown, in one embodiment, the temperature-sensitive driving element is a bimetallic strip 144 (a double-layer metal strip made of two different metal materials) located at the bottom end of the ejector rod 141 and fixed to the top of the heat conducting block 111. When the heat conducting block 111 is heated, the bimetallic strip 144 pushes the ejector rod 141 to abut against the mounting plate 130 by upward deformation.

[0067] In another embodiment, the temperature-sensitive driving element is a memory spring with its top end connected to the bottom end of the ejector rod 141 and its bottom end fixed to the top of the heat conducting block 111. The memory spring is in a stretched state when the heat conducting block 111 is heated and in a contracted state when the heat conducting block 111 is not heated. When the heat conducting block 111 is heated, the memory spring pushes the ejector rod 141 to abut against the mounting plate 130 by deformation.

[0068] Herein, to achieve the longitudinal displacement of the ejector rod 141, a limiting tube 143 slidably connected to the ejector rod 141 is sleeved outside the ejector rod 141 in the present invention. The limiting tube 143 can be fixed to the top of the heat conducting block 111 or the side wall of the heat sink 121 to limit the ejector rod 141.

[0069] It can be seen that in addition to using the thermal expansion of the ejector rod 141 itself, components such as a bimetallic strip 144 and a memory spring can be provided at the bottom of the ejector rod 141 to drive the ejector rod 141 to move upward, thereby completing the abutment between the ejector rod 141 and the mounting plate 130.

[0070] It should be understood that a feeding mechanism 150 is also connected above the nozzle. The present invention provides two connection methods between the feeding mechanism 150 and the throat tube 100.

[0071] The first connection method is as Figure 9 shown. The feeding mechanism 150 can be installed at other positions of the 3D printer. At this time, the discharging end of the feeding mechanism 150 is connected to a wire conduit 152. One end of the wire conduit 152 is connected to the outside of the throat tube 100 and communicates with the inside of the throat tube 100. The wire conduit 152 has the effect of guiding and limiting the wire 151, and the wire conduit 152 is made of a flexible material. In this way, the wire 151 passes through the feeding end of the feeding mechanism 150, then enters the wire conduit 152 after being driven by the feeding mechanism 150, then enters the throat tube 100, and finally enters the nozzle 101. When the throat tube 100 adjusts its position, due to the presence of the wire conduit 152, the positional relationship between the feeding mechanism 150 and the throat tube 100 will not be affected.

[0072] The second connection method is as Figure 10As shown, the pusher mechanism 150 is installed at the top of the mounting plate 130, and the discharge end of the pusher mechanism 150 is located above the throat pipe 100. At the same time, the inner diameter of the top of the throat pipe 100 is larger than the diameter of the wire 151. In this way, when the throat pipe 100 moves, the inner diameter of the top of the throat pipe 100 can provide a certain space for the movement of the throat pipe 100.

[0073] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification are only preferred examples of the present invention and are not used to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the appended claims and their equivalents.

Claims

1. An industrial mold 3D printer nozzle with a positioning device, comprising a throat (100), a nozzle (101) and a mounting plate (130), characterized in that: It also includes a calibration piece (201) located below the initial position of the nozzle; the throat (100) and the nozzle (101) are in communication, a heat dissipation element (120) is provided at the throat (100), and a heating element (110) is provided at the nozzle (101); The mounting plate (130) has at least two connection parts, one of which is slidably connected to the throat (100), and the other is fixedly connected to the driving device; The calibration piece (201) is used to guide the position of the nozzle (101) during the downward movement of the nozzle, so that the nozzle (101) adjusts the positional relationship between the mounting plate (130) and the nozzle (101) through the throat (100); A locking component (140) is provided at the heating element (110); when the heating element (110) is heated, the locking component (140) uses the force of thermal expansion to switch the throat (100) and the mounting plate (130) from a sliding connection state to a fixed connection state, thereby fixing the position of the adjusted nozzle (101).

2. The industrial mold 3D printer nozzle with a positioning device according to claim 1, characterized in that: The top end of the locking component (140) extends to the bottom of the top end of the mounting plate (130), and when the locking component (140) undergoes thermal expansion, the throat (100) and the mounting plate (130) are switched from a sliding connection state to a fixed connection state by abutting against the mounting plate (130).

3. The industrial mold 3D printer nozzle with a positioning device according to claim 1, characterized in that: One end of the mounting plate (130) is kept parallel to the top end of the throat pipe (100) to achieve a sliding connection between the mounting plate (130) and the throat pipe (100), and the other end is fixedly connected to the driving device.

4. The industrial mold 3D printer nozzle with a positioning device according to claim 1, characterized in that: The top end of the mounting plate (130) is provided with a through hole (131) that penetrates vertically, and the top end of the mounting plate (130) is provided with a hollow structure, so that a sliding cavity (132) that communicates with the side wall of the through hole (131) is formed inside the top end of the mounting plate (130); The top end of the throat pipe (100) penetrates from the bottom of the opening (131) to the middle of the opening (131), expands toward the periphery, and then enters the sliding cavity (132) through the side wall of the opening (131); The diameter of the throat (100) is smaller than the diameter of the through opening (131).

5. The industrial mold 3D printer nozzle with a positioning device according to claim 1, characterized in that: The calibration piece (201) is in the shape of a "bowl" with a thick opening at the top and a thin bottom, and the curvature of the inner wall of the calibration piece (201) corresponds to the curvature of the outer circle of the nozzle (101); The calibration piece (201) is fixedly arranged on the top of the molding platform (200) and is located at the initial position of the nozzle (101), and the initial position is the position where the nozzle needs to be reset after each printing work is completed.

6. The industrial mold 3D printer nozzle with a positioning device according to claim 1, characterized in that: The locking component (140) comprises a top rod (141) whose bottom end is fixedly contacted with the heating element (110) and whose top end extends to the bottom of the top end of the mounting plate (130), and a gap is provided between the top end of the top rod (141) and the bottom of the top end of the mounting plate (130); When the heat of the heating element (110) is transferred to the top rod (141), the top rod (141) expands due to the heat and becomes larger in volume, and abuts against the bottom of the top end of the mounting plate (130).

7. The industrial mold 3D printer nozzle with a positioning device according to claim 6, characterized in that: The elongated length of the push rod (141) after thermal expansion is greater than the gap between the push rod (141) and the mounting plate (130).

8. The industrial mold 3D printer nozzle with a positioning device according to claim 1, characterized in that: The heating element (110) comprises a heat conducting block (111) and a heat rod (112) inserted into the heat conducting block (111) and used to transfer heat to the nozzle (101) through the heat conducting block (111); The throat (100) and the nozzle (101) are both arranged vertically, and the bottom end of the throat (100) abuts against the top end of the nozzle (101), and the abutting point is connected via a heat conduction block (111).

9. The industrial mold 3D printer nozzle with a positioning device according to claim 6, characterized in that: The locking component (140) further comprises a temperature-sensitive driving element arranged at the bottom end of the push rod (141), wherein the temperature-sensitive driving element utilizes the heat of the heating element (110) to drive the push rod (141) to abut against the mounting plate (130).

10. The industrial mold 3D printer nozzle with a positioning device according to claim 9, characterized in that: The temperature-sensing driving element is a bimetallic strip (144) located at the bottom end of the top rod (141); the bimetallic strip (144) is in fixed contact with the heating element (110); when the heating element (110) is heated, the bimetallic strip (144) pushes the top rod (141) to abut against the mounting plate (130) by deforming upwards; The outer ring sleeve of the push rod (141) is provided with a limit tube (143) slidably connected to the push rod (141), and the limit tube (143) is connected to the heating element (110) or the heat dissipation element (120).

Images