Printhead assembly and molding apparatus

Abstract

The application provides a printing head assembly and a forming device. The printing head assembly is applied to the forming device, the forming device comprises a driving unit and a work platform; the printing head assembly is connected with the driving unit and is used for generating relative displacement with the work platform under the driving of the driving unit; the printing head assembly comprises a mounting part and an extension module, the mounting part comprises a first guide member extending along a first direction, the extension module comprises a second guide member extending along the first direction, and the first guide member and the second guide member can be mutually embedded; the printing head assembly comprises a locking mechanism, which is used for providing the mounting part and the extension module with a force of approaching each other or separating from each other under the condition that the first guide member and the second guide member are mutually embedded, so as to limit the movement of the extension module along a second direction perpendicular to the first direction. Through the application, the firmness of the extension module mounted on the printing head assembly in the forming device can be improved.

Description

[0001] This application claims priority to Chinese Patent Application No. 202510277062.5, filed on March 7, 2025, entitled “Printhead Assembly, Filter Assembly, Cutting Module, Writing Module and Forming Equipment”, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to 3D printing technology, and more particularly to a printhead assembly and forming equipment. Background Technology

[0003] 3D printing equipment is a rapid prototyping process. Currently, the most commonly used 3D printing technology is fused deposition modeling (FDM). FDM is a technology that constructs three-dimensional objects by heating materials such as plastics into a molten state based on digital models, extruding them from an extruder, and then printing them layer by layer.

[0004] To broaden the application range of the above-mentioned molding equipment, various types of expansion modules, such as laser modules, cutting modules, or writing modules, can be installed on the printhead assembly or drive unit.

[0005] The expansion module can be connected to the printhead assembly via threaded connectors such as bolts. For example, multiple threaded holes can be provided on the main frame of the printhead assembly, and multiple through holes can be provided on the expansion module accordingly. The expansion module can be fixed to the main frame by passing bolts through the through holes and threaded holes.

[0006] Alternatively, the expansion module can be connected magnetically. Magnets are placed on the expansion module and / or the main frame, relying on the magnetic attraction to secure the expansion module to the main frame. This method is simple to install and easy to operate. However, magnetic attachment is usually not very secure and there is a risk of it falling off when the printhead assembly moves rapidly or is subjected to external force.

[0007] In summary, how to securely fix the expansion module to the printhead assembly is a problem that urgently needs to be solved. Utility Model Content

[0008] This application provides a printhead assembly and molding device that can improve the secure mounting of the expansion module on the printhead assembly.

[0009] The technical solution of this application embodiment is implemented as follows:

[0010] In a first aspect, a printhead assembly is provided for use in a molding apparatus, the molding apparatus including a drive unit and a work platform; the printhead assembly is connected to the drive unit and is used to generate relative displacement with the work platform under the drive of the drive unit; the printhead assembly includes a mounting portion and an extension module, the mounting portion including at least one first guide extending along a first direction, the extension module including at least one second guide extending along the first direction, the first guide and the second guide being capable of engaging with each other along the first direction; the printhead assembly further includes a locking mechanism, the locking mechanism being used to provide a force for the mounting portion and the extension module to move closer to or further apart when the first guide and the second guide are engaged, thereby restricting the movement of the extension module in a second direction perpendicular to the first direction.

[0011] The technical solution provided in this application provides a guide and a locking mechanism that can fit together between the mounting part of the printhead assembly and the expansion module. After the expansion module is moved to the installation position along the guide, the locking mechanism makes the guide on the mounting part and the expansion module fit tightly together, which can eliminate the sliding gap between the guides, making the installation process convenient and the connection reliable.

[0012] In some embodiments, the locking mechanism includes at least one eccentric wheel handle assembly, the eccentric wheel handle assembly including an eccentric wheel rotatably connected to the extension module and a handle fixedly connected to the eccentric wheel.

[0013] Based on the above technical means, the locking mechanism is set as an eccentric wheel handle assembly. Utilizing its eccentric characteristics, it generates thrust when rotated, thereby achieving reliable locking between the first guide member and the second guide member. The handle in this eccentric wheel handle assembly has an extended lever arm, improving the ease of operation for the user.

[0014] In some embodiments, the mounting portion further includes a positioning unit, the positioning unit including a first stop and / or at least one snap-fit ​​structure; the first stop includes a baffle disposed at the end of the mounting portion along the first direction; the snap-fit ​​structure includes a first snap-fit ​​formed on the mounting portion and a second snap-fit ​​formed on the expansion module, wherein when the expansion module slides along the first direction to the end of the mounting portion under the constraint of the first guide and the second guide, the first snap-fit ​​and the second snap-fit ​​engage with each other.

[0015] Based on the aforementioned technical means, a positioning unit is incorporated to achieve precise installation and positioning of the expansion module, preventing excessive sliding. The snap-fit ​​structure provides mechanical stops, enhancing module connection strength and reducing wobbling.

[0016] In some embodiments, under the constraint of the first guide and the second guide, when the expansion module slides along the first direction until the first buckle and the second buckle are engaged with each other, the locking mechanism is used to lock the expansion module to the mounting part.

[0017] Based on the aforementioned technical means, the first and second clips can be engaged together during the user's handheld installation of the expansion module, thereby positioning the expansion module. At the same time, there will be a noticeable change in force, allowing the user to perceive that the module has been installed in place.

[0018] In some embodiments, the first buckle is a recessed buckle, and the second buckle is a convex buckle.

[0019] Based on the aforementioned technical means, the structural design of convex and concave buckles can enhance the reliability of the buckle's engagement.

[0020] In some embodiments, the first direction is the Z-axis direction of the molding device.

[0021] Based on the aforementioned technical means, the expansion module can be installed along the Z-axis direction of the molding equipment.

[0022] In some embodiments, the mounting portion is provided with two first guide members spaced apart along the X-axis, and the expansion module is provided with two second guide members spaced apart along the X-axis; or, the mounting portion is provided with two first guide members spaced apart along the Y-axis, and the expansion module is provided with two second guide members spaced apart along the Y-axis.

[0023] Based on the above-mentioned technical means, by setting two first guide members and two second guide members at intervals along the X-axis or Y-axis, the shaking of the expansion module can be further reduced.

[0024] In some embodiments, the printhead assembly further includes two or more extrusion heads connected to the drive unit, and the mounting portion is disposed on the extrusion head.

[0025] Based on the above technical means, the problem that "a 3D printing device with one extrusion head can usually only print a single material, and when changing materials, the extrusion head needs to be removed and replaced, which makes the operation process cumbersome" can be solved. It can also solve the problem that "after replacing the extrusion head, the user must also calibrate the position of the newly installed extrusion head, otherwise it will seriously affect the printing accuracy, which undoubtedly increases the difficulty of operation".

[0026] In some embodiments, the two extrusion heads include a first extrusion head and a second extrusion head, the first extrusion head and the second extrusion head having different diameters, and / or the first extrusion head and the second extrusion head being used to print different consumables, the different consumables including consumables of different colors and / or consumables of different materials.

[0027] Based on the aforementioned technical means, the differences between the first and second extruders in many aspects enable 3D printing equipment to perform printing jobs with different printing precision requirements and easily achieve multi-color printing, adding rich color gradations to printed works. Through this diverse configuration, 3D printing equipment can adapt to a wider range of application scenarios.

[0028] In some embodiments, the two extrusion heads include a first extrusion head and a second extrusion head, and the printhead assembly further includes a main frame, wherein the first extrusion head is fixedly connected to the main frame, and the second extrusion head is movably connected to the main frame.

[0029] Based on the above technical means, the problem that "a 3D printing device with one extrusion head can usually only print a single material, and when changing materials, the extrusion head needs to be removed and replaced, which makes the operation process cumbersome" can be solved. It can also solve the problem that "after replacing the extrusion head, the user must also calibrate the position of the newly installed extrusion head, otherwise it will seriously affect the printing accuracy, which undoubtedly increases the difficulty of operation".

[0030] In some embodiments, the second extruder head moves along the Z-axis direction, such that the nozzle height of the second extruder head is higher than the nozzle height of the first extruder head, so as to use the first extruder head for printing.

[0031] According to the above-mentioned technical means, when the first extruder is working, the second extruder can be moved to a position above the first extruder to avoid the second extruder colliding with the printed parts on the printing platform when the first extruder is working.

[0032] In some embodiments, the second extruder head moves along the Z-axis direction so that the nozzle height of the second extruder head is lower than the nozzle height of the first extruder head, so as to use the second extruder head for printing.

[0033] Based on the above technical means, when it is necessary to switch extruders, the second extruder is controlled to move downward so that its nozzle height is lower than that of the first extruder, and printing can be performed using the second extruder.

[0034] In some embodiments, the drive unit includes a motor and a timing belt, the motor being used to drive the timing belt, which is arranged in different directions, to move, thereby driving the printhead assembly to generate relative displacement with respect to the work platform.

[0035] Based on the above technical means, the print head can be moved in multiple directions.

[0036] In a second aspect, a molding apparatus is provided, comprising a printhead assembly as described in any of the first aspects.

[0037] Based on the aforementioned technical means, the molding equipment adopts a modular design, supporting the rapid replacement of functional modules, enabling the molding equipment to adapt to diverse processing needs. When replacing expansion modules, the interlocking of guide components and the locking mechanism ensure convenient operation and reliable module connection.

[0038] In some embodiments, the expansion module is a laser module, a cutting module, a writing module, a milling module, or an engraving module.

[0039] Based on the aforementioned technical means, these expansion modules can move under the drive of the drive unit of the 3D printing equipment to achieve functions such as laser engraving, cutting, writing, and drawing.

[0040] In some embodiments, the expansion module is a laser module, and the driving unit is used to drive the laser module to move on a horizontal plane to cut and / or engrave materials.

[0041] Based on the above-mentioned technical means, relying on the drive unit on the printhead assembly, the movement of the laser module is precisely controlled to cut and / or engrave materials from different horizontal positions to obtain various complex patterns.

[0042] In some embodiments, a rotary device is provided on the working platform, which is used to drive a rotating body or an object with an irregular surface to rotate.

[0043] Based on the above-mentioned technical means, it is possible to efficiently cut or carve irregularly shaped objects, which greatly expands the processing range of 3D printing equipment.

[0044] In some embodiments, the laser module is used to emit a laser beam to irradiate the material, so as to melt, vaporize or reach the ignition point of the material, and the molten or burning material can be blown away by an airflow coaxial with the laser beam.

[0045] Based on the above-mentioned technical means, molten or burning materials can be blown away by a high-speed airflow coaxial with the beam.

[0046] In some embodiments, the expansion module is a cutting module, which moves along a target path under the drive of the driving unit to cut the material to be cut.

[0047] According to the above technical means, the cutting module can move along the target path under the drive of the driving unit, thereby forming a preset pattern on the material being cut.

[0048] In some embodiments, the material to be cut is attached to the working platform, or the forming device further includes a cutting platform for placing the material to be cut.

[0049] Based on the above-mentioned technical means, the cutting module can be used to cut materials such as paper, film or stickers.

[0050] In some embodiments, the extension module is a writing module, and the extension module is provided with a clamping part for fixing the writing tool.

[0051] Based on the aforementioned technical means, the writing module can hold different types of writing tools, such as hard pens like pencils or ballpoint pens, or soft pens like brushes or cotton pens, by using the writing tool clamping part on the extension module, making it easier for users to achieve diverse artistic effects and styles. Attached Figure Description

[0052] Figure 1 This is a schematic diagram of the molding equipment provided in the embodiments of this application;

[0053] Figure 2 for Figure 1 A partial structural diagram of the printhead assembly in the image;

[0054] Figure 3 for Figure 2 View from direction A;

[0055] Figure 4 for Figure 2 Side view;

[0056] Figure 5 A cross-sectional schematic diagram of the first guide member and the second guide member provided in the embodiments of this application.

[0057] The reference numerals and names in the figure are as follows:

[0058] Molding equipment 100, printhead assembly 110, expansion module 111, second guide 1111, third side 11111, fourth side 11112, second mating surface 1112, shaft 1113, mounting part 112, first guide 1121, first side 11211, second side 11212, first mating surface 1122, positioning unit 1123, first stop 1124, baffle 11241, snap-fit ​​structure 1125, first snap-fit ​​11251, second snap-fit ​​11252, flange 11253, groove 11254, eccentric wheel handle assembly 113, eccentric wheel 1131, handle 1132, bearing 1133, drive unit 120, and working platform 130. Detailed Implementation

[0059] To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings. The described embodiments should not be regarded as limitations on this application. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0060] In the following description, references are made to “some embodiments,” which describe a subset of all possible embodiments. However, it is understood that “some embodiments” may be the same subset or different subsets of all possible embodiments and may be combined with each other without conflict.

[0061] In the following description, the terms "first, second, third" are used merely to distinguish similar objects and do not represent a specific ordering of objects. It is understood that "first, second, third" may be interchanged in a specific order or sequence where permitted, so that the embodiments of this application described herein can be implemented in an order other than that illustrated or described herein.

[0062] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing embodiments of this application only and is not intended to limit this application.

[0063] Before providing a more detailed description of the embodiments of this application, the problems existing in 3D printing equipment will be explained in detail.

[0064] 3D printing equipment, also known as three-dimensional printers or stereo printers, is a type of processing equipment with rapid prototyping capabilities, playing a vital role in many industries such as modern manufacturing and design.

[0065] The most commonly used 3D printing technology is fused deposition modeling (FDM). FDM is a technology that uses digital models to heat materials such as plastics into a molten state and extrude them from an extruder, then constructs three-dimensional objects by stacking them layer by layer.

[0066] The printhead assembly is one of the key components of a 3D printing device. The printhead assembly includes an extrusion head, which can generate relative displacement between itself and the printing platform under the drive of the drive unit. The extrusion head typically includes a heating component and a nozzle. The heating component is used to heat the printing material to a molten state, and the nozzle is used to extrude the molten material, thereby printing the model on the printing platform.

[0067] For 3D printing equipment with a single extruder, the diameter and temperature of the extruder are generally fixed during a single print run, meaning it can typically only print with a single material. When changing materials, the extruder needs to be removed and replaced, which makes the operation quite cumbersome. Furthermore, after replacing the extruder, the user must calibrate the position of the newly installed extruder; otherwise, the printing accuracy will be severely affected, which undoubtedly increases the difficulty of operation.

[0068] To solve the above problems, multiple extruders can be set in the printing component or the extruders can be set to be automatically replaceable.

[0069] Taking a printhead assembly with multiple extrusion heads, including a first extrusion head and a second extrusion head, as an example, the printhead assembly also includes a main frame for connecting the extrusion heads and the drive unit of the 3D printer. In the above-described printhead assembly with two extrusion heads, both extrusion heads are connected to the main frame. The first extrusion head is fixedly connected to the main frame; this first extrusion head can also be called a fixed extrusion head. The second extrusion head is movably connected to the main frame, allowing it to move in the Z-axis direction; this second extrusion head can also be called a movable extrusion head. When the first extrusion head is working, the second extrusion head can move to a position above the first extrusion head to avoid collision between the second extrusion head and the printed part on the printing platform. When it is necessary to switch extrusion heads, the second extrusion head is controlled to move downwards, so that its nozzle height is lower than that of the first extrusion head, allowing printing to be performed using the second extrusion head.

[0070] The first and second extruders can differ in many ways. For example, they can be different sizes. For instance, the first extruder might have a 0.2mm orifice, and the second extruder a 0.4mm orifice. By using different sized extruders, the 3D printer can achieve printing jobs with varying precision requirements. When high precision and rich detail are needed, a smaller-diameter first extruder can be used; conversely, for scenarios with lower precision requirements but requiring rapid prototyping or printing larger objects, a larger-diameter second extruder can be used. Alternatively, the two extruders can be used to print different colors of filament, enabling multi-color printing and adding rich color gradations to the printed works. Or, they can be used to print different filaments; for example, the first extruder can be used to print ABS, a material with good strength and heat resistance, while the second extruder can be used to print PLA, a material known for its environmental friendliness and ease of processing. Through this diverse configuration, the 3D printer can adapt to a wider range of applications.

[0071] As another possible implementation, an area for storing extruder heads can be set up in the 3D printing equipment, in which multiple extruder heads can be placed.

[0072] When the extruder head needs to be replaced, the drive unit moves the printhead assembly to the extruder head storage area. A robotic arm or other auxiliary equipment is used to remove the extruder head from the printhead assembly. Alternatively, the printhead assembly is configured to automatically remove the extruder head. Afterward, the extruder head to be installed is secured in the printhead assembly. Once the extruder head replacement is complete, the drive unit moves the printhead assembly from the extruder head storage area to the work area and calibrates the extruder head.

[0073] To expand the functionality of 3D printing equipment and enable it to play a role in more fields, some expansion modules can be installed on the print head assembly. These expansion modules include, but are not limited to, laser modules, cutting modules, and writing modules. These expansion modules can move under the drive of the drive unit of the 3D printing equipment to realize functions such as laser engraving, cutting, writing, and drawing.

[0074] Taking the laser module as an example, it can emit a high-power-density laser beam to irradiate materials, causing them to melt, vaporize, or reach their ignition point rapidly. Simultaneously, a high-speed airflow coaxial with the laser beam blows away the molten or burning material. When applied in 3D printing equipment, it can achieve complex movements based on the driving capabilities of the drive unit, thus realizing various functions. For example, by placing common materials such as paper or wood on the printing platform and precisely driving the laser module to move on a horizontal plane, it is possible to accurately cut these materials, creating various complex shapes and patterns. Another example is that the laser focus can be controlled while driving the laser module to move, enabling internal engraving on transparent materials such as glass or acrylic. Furthermore, a rotation device can be set on the printing platform to drive rotating bodies or objects with irregular surfaces to rotate. Combined with the movement of the laser module, this allows for efficient cutting or carving of irregularly shaped objects, greatly expanding the processing range of 3D printing equipment.

[0075] The cutting module can be used to cut materials such as paper, film, or stickers. During the cutting operation, the material to be cut can be either closely attached to the printing platform of the printing equipment or placed on a specially designed cutting platform. Driven by the drive unit, the cutting module can move along the target path to form a preset pattern on the material being cut.

[0076] When the expansion module is a writing module, the 3D printer's functionality can be extended to an automatic writing machine (or writing robot). The writing module is equipped with a gripper for writing tools, allowing users to fix different types of writing tools (such as hard pens like pencils or ballpoint pens, and soft pens like brushes or cotton pens) onto the writing module, and perform writing or drawing functions on paper or a drawing board under the drive of the drive unit.

[0077] In related technologies, there are many ways to install expansion modules.

[0078] The expansion module can be connected to the printhead assembly via threaded fasteners such as bolts. More specifically, multiple threaded holes can be provided on the main frame of the printhead assembly, and corresponding through holes can be provided on the expansion module. Bolts are then passed through these through holes and threaded holes to fix the expansion module to the main frame. This bolted connection method provides a secure and stable fixation without any wobbling. However, to ensure a secure installation, more than three bolts are required, which makes the installation process relatively complex.

[0079] The expansion module can also be connected magnetically. Magnets are placed on the expansion module and / or the main frame, relying on the magnetic attraction to fix the expansion module to the main frame. This method is simple to install and easy to operate. However, magnetic attachment is usually not very secure and there is a risk of it falling off when the printhead assembly moves rapidly or is subjected to external force.

[0080] In view of the above problems, this application provides a printhead assembly and a molding device. The technical solution of this application will be described in detail below with reference to the accompanying drawings.

[0081] This application first provides a printhead assembly applied to a molding device. Figure 1 This is a schematic structural diagram of the molding equipment provided in the embodiments of this application. Figure 2 This is a magnified view of the printhead assembly. Figure 3 and Figure 4 They are Figure 2 A-direction view and side view.

[0082] Figure 1 The molding equipment 100 includes a printhead assembly 110, a drive unit 120, and a work platform 130.

[0083] The printhead assembly 110 is connected to the drive unit 120 and is used to generate relative displacement between itself and the work platform 130 under the drive of the drive unit 120, so as to perform 3D printing, engraving or cutting operations on the work platform 130.

[0084] The drive unit 120 can have many structural forms. For example, the drive unit 120 may include a motor and lead screws. Multiple lead screws may be arranged along the X-axis, Y-axis and Z-axis respectively. The motor is used to drive the lead screws to rotate so that the lead screw nut can move along the axis of the lead screw, thereby driving the print head assembly 110 to move along the X-axis, Y-axis and Z-axis. Alternatively, the drive unit 120 may also include a motor and a timing belt, etc. The motor drives the pulley to rotate, thereby driving the timing belt to move. By arranging the timing belt transmission mechanism along different directions, the print head can move in multiple directions.

[0085] See also Figures 1-3 The printhead assembly 110 includes an expansion module 111 and a mounting section 112.

[0086] In this embodiment of the application, the expansion module 111 may also be referred to as a functional module, an add-on module, or an extension module.

[0087] The expansion module 111 can be the laser module, cutting module, or writing module mentioned above, or it can also be a milling module, engraving module, etc. This application embodiment does not specifically limit it in this way.

[0088] Mounting section 112 can be the main frame of printhead assembly 110, which is configured to mount the extruder head; that is, the extension module 111 and the extruder head are mounted on the main frame simultaneously. Alternatively, in some implementations, where the extruder head is directly connected to the drive unit 120 of the 3D printer, mounting section 112 can be located on the extruder head.

[0089] The mounting section 112 includes a first guide member 1121, and the expansion module 111 is provided with a second guide member 1111. Both the first guide member 1121 and the second guide member 1111 extend along a first direction, which is the mounting direction of the expansion module 111.

[0090] exist Figure 1 In the example, the first direction is aligned with the Z-axis direction of the molding device 100, meaning that the expansion module 111 can be installed along the Z-axis direction of the molding device 100. As another possible implementation, the first direction can also be aligned with the X-axis or Y-axis direction.

[0091] In other words, the expansion module 111 can also be installed in the front-back or left-right direction of the molding equipment 100.

[0092] Continue reading Figure 1 The first guide member 1121 protrudes outward from the first mating surface 1122 of the mounting portion 112. This first guide member 1121 can also be referred to as a guide rail. Correspondingly, the second guide member 1111 is a guide groove formed by recessing inward from the second mating surface 1112 of the expansion module 111. The first mating surface 1122 and the second mating surface 1112 are two surfaces on the mounting portion 112 and the expansion module 111 that fit together.

[0093] Figure 1 The cross-sectional shape of the first guide member 1121 and the second guide member 1111 is T-shaped, that is, the first guide member 1121 is a protruding T-shaped slide rail structure, and the second guide member 1111 is a T-shaped guide groove 11254. This structure allows the first guide member 1121 and the second guide member 1111 to fit together, which provides constraints for the extension module 111 in other directions besides the first direction.

[0094] It is understood that the first guide member 1121 and the second guide member 1111 with the T-shaped cross section described above are only examples. The cross sections of the first guide member 1121 and the second guide member 1111 can also be trapezoidal, Y-shaped or other shapes. This application embodiment does not limit this.

[0095] It is also understood that the embodiments of this application do not limit the number of the first guide member 1121 and the second guide member 1111. Figure 1The first guide 1121 and the second guide 1111 shown are merely examples, and there can be multiple first guides 1121 and second guides 1111. For example, two first guides 1121 and two guides 1111 can be spaced apart along the X-axis or Y-axis, which can reduce the shaking of the expansion module 111 to a certain extent.

[0096] It should also be noted that the embodiments of this application do not specifically limit the forming direction of the first guide member 1121 and the second guide member 1111.

[0097] Figure 1 The first guide member 1121 protruding outward and the second guide member 1111 recessed inward shown are merely examples. As another implementation, the first guide member 1121 may be a groove 11254 formed on the mounting portion 112, and the second guide member 1111 may be a protruding slide rail structure formed on the extension module 111.

[0098] The printhead assembly 110 also includes a locking mechanism for providing a force to bring the mounting portion 112 and the expansion module 111 closer together or separate them when the first guide 1121 and the second guide 1111 are engaged with each other, so that the first guide 1121 and the second guide 1111 fit tightly together.

[0099] The aforementioned locking mechanism can be installed on the expansion module 111 or on the mounting part 112.

[0100] For example, a locking mechanism is provided on the mounting part 112. After the expansion module 111 is installed in the first direction, the locking mechanism is used to lock the expansion module 111 to the mounting part 112, thereby providing a constraint for the expansion module 111.

[0101] The locking mechanism can provide a force that brings the expansion module 111 and the mounting part 112 closer together or separates them from each other, so that the two sides of the first guide member 1121 and the second guide member 1111 that are close to each other fit tightly together, eliminating the gap between them and preventing the expansion module 111 from shaking.

[0102] The locking mechanism can be an automatic locking mechanism or a manual locking mechanism.

[0103] The automatic locking mechanism can be implemented based on a mechanical mechanism. For example, an elastic element can be provided on the side of the mounting part 112 near the expansion module 111. This elastic element can abut against the expansion module 111 after the expansion module 111 is installed in place, providing a force away from the mounting part 112 to ensure a tight fit between the first guide member 1121 and the second guide member 1111. Alternatively, the automatic locking mechanism can be implemented based on an automatic control method. For example, an electric push rod or electric pull rod can be provided in the mounting part 112. After the mounting part 112 is installed in place, the electric push rod or electric pull rod drives the expansion module 111 to move away from the mounting part 112, thereby eliminating the gap between the first guide member 1121 and the second guide member 1111.

[0104] The manual locking mechanism may be a latch, which the user can engage after the expansion module 111 is installed in place, thereby eliminating the gap between the first guide 1121 and the second guide 1111.

[0105] According to the above-mentioned technical means, by providing a guide and a locking mechanism that can fit into each other between the mounting part 112 and the expansion module 111 of the printhead assembly 110, after the expansion module 111 is moved to the installation position along the extension direction of the guide, the locking mechanism makes the guide on the mounting part 112 and the expansion module 111 fit tightly together, which can eliminate the sliding gap and make the installation convenient and reliable.

[0106] Figure 5 This illustrates one possible implementation of the first guide member 1121 and the second guide member 1111. For example... Figure 5 As shown, the cross-sections of the first guide member 1121 and the second guide member 1111 are trapezoidal. The first guide member 1121 has a first side surface 11211 and a second side surface 11212, and the second guide member 1111 has a third side surface 11111 and a fourth side surface 11112. After the first guide member 1121 and the second guide member 1111 are engaged with each other, the first side surface 11211 is close to the third side surface 11111, and the second side surface 11212 is close to the fourth side surface 11112. The two sides that are close to each other are parallel to each other. At the same time, in order to ensure that the first guide member 1121 and the second guide member 1111 can slide relative to each other, the two sides that are close to each other are not tightly fitted.

[0107] Figure 5The dashed lines in the diagram indicate the state when the first guide member 1121 and the second guide member 1111 are tightly fitted together. When the locking mechanism provides a force that pushes the first guide member 1121 and the second guide member 1111 away from each other, since the aforementioned surfaces are all inclined planes, the thrust F provided by the locking mechanism is decomposed by the inclined planes into a first component force F1 perpendicular to the inclined planes and a second component force F2 extending outward in the horizontal direction. The first component force F1 perpendicular to the inclined planes ensures that the two adjacent surfaces are tightly fitted together, while the second component force F2 in the horizontal direction ensures that the first guide member 1121 and the second guide member 1111 are constrained in the horizontal direction.

[0108] In some embodiments, the locking mechanism may be as follows: Figure 3 and Figure 4 The eccentric wheel handle assembly 113 is mentioned in the text.

[0109] In some embodiments, the eccentric wheel handle assembly 113 may be disposed on the expansion module 111.

[0110] The eccentric wheel handle assembly 113 includes an eccentric wheel 1131 and a handle 1132 fixedly connected to the eccentric wheel 1131. The handle 1132 is fixed to the outside of the eccentric wheel 1131 along the diameter direction of the eccentric wheel 1131. The eccentric wheel 1131 is rotatably connected to the expansion module 111. There is a deviation between the rotation center and the geometric center of the outer edge of the eccentric wheel 1131. The distance between the rotation center and the geometric center is the eccentricity of the eccentric wheel 1131. The eccentric wheel handle assembly 113 is also called a locking cam.

[0111] When the handle 1132 is turned, the outer edge of the eccentric wheel 1131 approaches and eventually abuts against the surface of the mounting portion 112 near the expansion module 111 (i.e., the aforementioned first mating surface 1122), providing a thrust to the expansion module 111 away from the mounting portion 112, so that the first guide member 1121 and the second guide member 1111 can fit tightly together. At the same time, the friction between the outer edge of the eccentric wheel 1131 and the mounting portion 112 further locks the expansion module 111, thereby improving the stability of the installation.

[0112] Understandably, in order to avoid jamming when pushing the extension module 111 in the first direction, there must be a gap between the first guide 1121 and the second guide 1111. The eccentric wheel handle assembly 113 applies a pushing force to make the first guide 1121 and the second guide 1111 fit tightly together, eliminating the sliding gap and improving the installation accuracy.

[0113] According to the above technical means, the locking mechanism is set as an eccentric wheel handle assembly 113. Utilizing its eccentric characteristics, it generates thrust when rotating, thereby achieving reliable locking between the mounting part 112 and the expansion module 111. The handle 1132 in the eccentric wheel handle assembly 113 has an extended lever arm, which improves the convenience of user operation.

[0114] In some embodiments, the outer edge of the eccentric wheel 1131 is covered with a material capable of elastic deformation. For example, the outer edge of the eccentric wheel 1131 can be coated with rubber or an elastic material such as rubber can be attached to its outer surface. This type of material can produce elastic deformation within a certain range. After the handle 1132 drives the eccentric wheel 1131 to rotate, causing the outer edge of the eccentric wheel 1131 to contact the second mating surface 1112, the deformation of the elastic material allows the eccentric wheel 1131 to continue rotating, thereby further increasing the thrust provided by the eccentric wheel 1131. At the same time, this type of elastic material can also provide greater friction, preventing the eccentric wheel 1131 from springing back and reversing, making the locking more secure.

[0115] In some embodiments, the eccentric wheel handle assembly 113 further includes a bearing 1133 disposed between the eccentric wheel 1131 and the extension module 111.

[0116] More specifically, the expansion module 111 has a shaft 1113 protruding from its side wall, and the inner and outer rings of the bearing 1133 are connected to the outer circle of the shaft 1113 and the bearing 1133 hole of the eccentric wheel 1131, respectively.

[0117] This application does not specifically limit the type of bearing 1133 described above. The bearing 1133 can be a rolling bearing 1133 or a sliding bearing 1133. Among them, the rolling bearing 1133 can be a ball bearing 1133 or a roller bearing 1133.

[0118] Based on the above technical means, the design of the bearing 1133 in the eccentric wheel handle assembly 113 can reduce the frictional resistance when the eccentric wheel 1131 rotates, ensure the smoothness of the locking action, and at the same time reduce mechanical wear and extend the service life of the locking mechanism.

[0119] In the embodiments of this application, the number of the above-mentioned eccentric wheel handle assembly 113 can be one, and the one eccentric wheel handle assembly 113 is disposed on one side of the expansion module 111 along the width direction; or, the number of eccentric wheel handle assemblies 113 can be two, and the two eccentric wheel handle assemblies 113 are symmetrically disposed on both sides of the expansion module 111 along the width direction. The provision of two eccentric wheel handle assemblies 113 can further improve the firmness of the installation.

[0120] In some embodiments, the eccentric wheel handle assembly 113 further includes a shaft end stop disposed at one end away from the extension module 111 along the axial direction of the shaft 1113. The shaft end stop is fixedly connected to the shaft 1113 and is used to provide axial positioning for the bearing 1133 and the eccentric wheel 1131.

[0121] For example, the shaft end stop can be a baffle plate, which can be fixed to the end of the shaft 1113 by a screw or other threaded connector; or, the shaft end stop can be an elastic retaining ring, which is sleeved on the shaft 1113 and abuts against the bearing 1133.

[0122] According to the above technical means, a shaft end stop is provided in the eccentric wheel handle assembly 113 to prevent the bearing 1133 and the eccentric wheel 1131 from moving along the shaft by axial positioning, thereby ensuring the structural stability of the locking mechanism.

[0123] In this embodiment, the mounting portion 112 further includes a positioning unit 1123 for positioning the expansion module 111 along a first direction. The positioning unit 1123 includes a first stop 1124 and / or at least one snap-fit ​​structure 1125.

[0124] like Figure 1 As shown, the first stop 1124 can be a baffle 11241 disposed at the end of the mounting part 112 along the first direction. When the expansion module 111 slides along the first direction to the end of the mounting part 112 under the constraint of the first guide 1121 and the second guide 1111, the end of the expansion module 111 along the first direction can abut against the baffle 11241.

[0125] The first stop 1124 can be integrally formed with the mounting part 112 body, or the first stop 1124 can be a structure that is separate from the mounting part 112 body, and can be combined and connected with the mounting part 112 body by means of bolt connection or the like.

[0126] The snap-fit ​​structure 1125 includes a first snap-fit ​​11251 formed on the mounting portion 112 and a second snap-fit ​​11252 formed on the expansion module 111.

[0127] When the expansion module 111 slides along the first direction to the end of the mounting part 112 under the constraint of the first guide 1121 and the second guide 1111, the first latch 11251 and the second latch 11252 engage with each other.

[0128] Based on the aforementioned technical means, the positioning unit 1123 is used to achieve precise installation and positioning of the expansion module 111, preventing excessive sliding of the module. The snap-fit ​​structure 1125 provides a mechanical stop, which can enhance the connection strength of the module and reduce shaking.

[0129] In some embodiments, a first latch 11251 extends from the edge of the first mating surface 1122 of the mounting portion 112 in a direction away from the first mating surface 1122, and a second latch 11252 is formed on the side wall of the expansion module 111, the side wall being perpendicular to the second mating surface 1112 of the expansion module 111.

[0130] Alternatively, as one possible implementation, the first snap fastener 11251 is formed on the first mating surface 1122, and the second snap fastener 11252 is formed on the second mating surface 1112.

[0131] For example, such as Figure 1 As shown, the first latch 11251 is a convex latch, and the second latch 11252 is a concave latch. The convex latch has a flange 11253 extending outward in a direction away from the first mating surface 1122, and the concave latch has a groove 11254 that matches the flange 11253. When the expansion module 111 slides along the first direction to the end of the mounting portion 112 under the constraint of the first guide member 1121 and the second guide member 1111, the flange 11253 extends into the groove 11254, causing the first latch 11251 and the second latch 11252 to engage with each other, thereby achieving the positioning of the expansion module 111.

[0132] Based on the aforementioned technical means, the convex and concave buckle structure design enhances the reliability of the buckle engagement. The matching of the flange 11253 and the groove 11254 prevents displacement of the module in the direction of the vertical mating surface. Simultaneously, the buckle structure 1125 engages with the expansion module 111 during user handheld installation, effectively positioning the expansion module 111. A noticeable change in force is also observed, allowing the user to perceive that the module is properly installed.

[0133] Still with Figure 1 Taking the snap-fit ​​structure 1125 shown in the figure as an example, Figure 1 The first buckle 11251 is fixedly connected to the mounting part 112 at one end along the first direction, and the other end is suspended, forming a cantilever structure. The flange 11253 at the suspended end can be elastically deformed within a certain range.

[0134] Both the flange 11253 on the first buckle 11251 and the groove 11254 on the second buckle 11252 are trapezoidal. When the expansion module 111 slides and causes the first buckle 11251 and the second buckle 11252 to contact each other, the edge of the second buckle 11252 first contacts the inclined side of the trapezoidal flange 11253. When a force is applied along the first direction, the inclined side can generate a component force toward the first mating surface 1122, pushing the first buckle 11251 to undergo elastic deformation, so that the expansion module 111 can continue to move along the first direction. When the expansion module 111 continues to move to the target position at the end of the mounting part 112, the first buckle 11251 returns to its initial state, and the flange 11253 of the first buckle 11251 extends into the groove 11254 of the second buckle 11252, so that the first buckle 11251 and the second buckle 11252 are fastened together.

[0135] It should also be noted that, Figure 1 The structures of the first snap fastener 11251 and the second snap fastener 11252 shown are merely examples. As one possible implementation, the first snap fastener 11251 and the second snap fastener 11252 can be a concave snap and a convex snap, respectively.

[0136] It is understandable that the number of the aforementioned at least one snap-fit ​​structure 1125 can be [number missing]. Figure 1 One of the shown; or, in some implementations, the number of snap-fit ​​structures 1125 may be two or more, and the two or more snap-fit ​​structures 1125 may be distributed on different sides of the expansion module 111. For example, snap-fit ​​structures 1125 may be provided on both sides of the expansion module 111 along the width direction.

[0137] It is also understood that the positioning unit 1123 may include only the first stop 1124, or only the snap-fit ​​structure 1125, or may have both the first stop 1124 and the snap-fit ​​structure 1125. This application embodiment does not specifically limit this.

[0138] Based on the printhead assembly 110 disclosed in the above embodiments, this application also provides a molding device 100, which can be a molding device 100 with multiple functions such as 3D printing, laser engraving, cutting, and writing. The structure of this molding device 100 can be found in [reference needed]. Figure 1 .

[0139] The molding apparatus 100 provided in this embodiment includes a printhead assembly 110, a drive unit 120, and a work platform 130. The printhead assembly 110 is connected to the drive unit 120 and is used to generate relative displacement with the work platform 130 under the drive of the drive unit 120. The printhead assembly 110 includes a mounting portion 112 and an extension module 111. The mounting portion 112 includes at least one first guide member 1121 extending along a first direction, and the extension module 111 includes at least one second guide member 1111 extending along the first direction. The first guide member 1121 and the second guide member 1111 are configured to interlock with each other.

[0140] The printhead assembly 110 also includes a locking mechanism for providing a force to bring the mounting portion 112 and the expansion module 111 closer together or separate them when the first guide 1121 and the second guide 1111 are engaged with each other, so that the first guide 1121 and the second guide 1111 fit tightly together.

[0141] The printhead assembly 110 of the molding equipment 100 provided in this embodiment adopts a modular design, which supports the quick replacement of functional modules, enabling the equipment to adapt to diverse processing needs. When replacing the expansion module 111, the interlocking of the guide members and the locking mechanism make the module replacement operation convenient and the module connection reliable.

[0142] In some embodiments, the locking mechanism includes at least one eccentric wheel handle assembly 113, the structure of which can be found in [reference needed]. Figure 3 and Figure 4 The eccentric wheel handle assembly 113 includes an eccentric wheel 1131 rotatably connected to the extension module 111 and a handle 1132 fixedly connected to the eccentric wheel 1131. The eccentric wheel handle assembly 113 is used to: when the first guide member 1121 and the second guide member 1111 are engaged with each other, the eccentric wheel 1131 rotates so that the outer edge of the eccentric wheel 1131 abuts against the side of the mounting part 112 near the extension module 111, so as to provide a thrust away from the mounting part 112 to the extension module 111, so that the first guide member 1121 and the second guide member 1111 are tightly fitted together.

[0143] In this technical solution, the thrust of the eccentric wheel handle assembly 113 enables the guide to fit tightly, reducing the gap between modules. The rotation of the handle 1132 enables quick locking and releasing, thereby improving the efficiency of changing the functional modules of the molding equipment 100.

[0144] In some embodiments, the eccentric wheel handle assembly 113 further includes a bearing 1133; the extension module 111 is provided with a shaft 1113 protruding from the extension module 111, the inner ring of the bearing 1133 is sleeved on the shaft 1113, and the bearing 1133 hole of the eccentric wheel 1131 is sleeved on the outer ring of the bearing 1133.

[0145] According to the above technical means, setting a bearing 1133 between the eccentric wheel 1131 and the shaft 1113 can reduce the rotational resistance of the eccentric wheel 1131, ensure the smoothness of the locking action, and at the same time reduce mechanical wear and extend the service life of the locking mechanism.

[0146] In some embodiments, the eccentric wheel handle assembly 113 further includes: a shaft end stop disposed along the axial direction of the shaft 1113 at one end away from the extension module 111, the shaft end stop being fixedly connected to the shaft 1113 and used to provide axial positioning for the bearing 1133 and the eccentric wheel 1131.

[0147] According to the above technical means, a shaft end stop is provided in the eccentric wheel handle assembly 113 to prevent the bearing 1133 and the eccentric wheel 1131 from moving along the shaft by axial positioning, thereby ensuring the structural stability of the locking mechanism.

[0148] In some embodiments, the mounting portion 112 further includes a positioning unit 1123, which includes a first stop 1124 and / or at least one snap-fit ​​structure 1125; the first stop 1124 includes a baffle disposed at the end of the mounting portion 112 along a first direction; the snap-fit ​​structure 1125 includes a first snap-fit ​​11251 formed on the mounting portion 112 and a second snap-fit ​​11252 formed on the expansion module 111, wherein when the expansion module 111 slides along the first direction to the end of the mounting portion 112 under the constraint of the first guide 1121 and the second guide 1111, the first snap-fit ​​11251 and the second snap-fit ​​11252 engage with each other.

[0149] Based on the aforementioned technical means, the positioning unit 1123 is used to achieve precise installation and positioning of the expansion module 111, preventing excessive sliding of the module. The snap-fit ​​structure 1125 provides a mechanical stop, which can enhance the connection strength of the module and reduce shaking.

[0150] In some embodiments, the first latch 11251 extends from the edge of the first mating surface 1122 of the mounting portion 112 near the expansion module 111 in a direction away from the first mating surface 1122. The second latch 11252 is formed on the side wall of the expansion module 111, which is a side of the expansion module 111 perpendicular to the second mating surface 1112. The second mating surface 1112 is the surface of the expansion module 111 that is in contact with the first mating surface 1122. The first latch 11251 is a protruding latch with a flange 11253 extending outward in a direction away from the first mating surface 1122. The second latch 11252 is a recessed latch with a groove 11254 that matches the flange 11253. When the expansion module 111 moves to the end of the mounting portion 112, the flange 11253 can extend into the groove 11254.

[0151] This application embodiment also provides a molding device 100, which may be a cutting machine.

[0152] The molding equipment 100 provided in this application embodiment includes a cutting module, a drive unit 120 (not shown in the figure), and a working platform 130. The cutting module includes a cutter fixing member and a cutter.

[0153] One end of the cutter holder is connected to the drive unit 120, and the other end is connected to the cutter.

[0154] The upper surface of the work platform 130 is covered with the material to be cut. After the cutting module is connected to the drive unit 120, it can move relative to the work platform 130 under the drive of the drive unit 120 to cut the material to be cut.

[0155] The embodiments of this application do not limit the specific type of material to be cut. For example, the material to be cut can be paper, film, etc.

[0156] The embodiments of this application do not limit the number of layers of the material to be cut; the material to be cut can be a single-layer material or a multi-layer material.

[0157] Multi-layer materials can be stickers formed by bonding a sticker body and release paper, or they can be multi-layer film materials formed by laminating films of different thicknesses.

[0158] Based on the writing module provided in the above embodiments, this application also provides a forming device 100, which may be, for example, a writing robot. The forming device 100 includes a writing module, a drive unit 120, and a working platform 130.

[0159] The molding equipment 100 also includes a housing, which encloses a cavity to form a receiving cavity. The writing module, the drive unit 120, and the working platform 130 are disposed within the receiving cavity.

[0160] The writing module includes a writing tool holder and a writing tool. One end of the writing tool holder is connected to the writing tool, and the other end is connected to the drive unit 120. The writing tool can move relative to the work platform 130 under the drive of the drive unit 120, thereby enabling the writing tool to perform functions such as writing, drawing, and coloring on the writing medium.

[0161] In the embodiments of this application, the writing instruments include hard pens or soft pens.

[0162] Revisit Figure 1 In some embodiments, Figure 1 The expansion module 111 in the molding device 100 shown is a writing module, which includes a writing tool holder and a writing tool; one end of the writing tool holder is connected to the print head assembly 110, and the other end is connected to the writing tool, which is used to write on the writing medium on the work platform 130 under the drive of the drive unit 120.

[0163] The expansion module 111 is set as a writing module, which broadens the application scope of the molding equipment 100.

[0164] In some embodiments, the extension module 111 in the printhead assembly 110 is the cutting module or writing module described in any of the preceding embodiments.

[0165] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0166] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0167] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0168] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0169] The above description is merely a preferred embodiment of this application and is not intended to limit the scope of protection of this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A printhead assembly, comprising: Applied to molding equipment, the molding equipment including a drive unit and a working platform; The printhead assembly is connected to the drive unit and is used to generate relative displacement with the work platform under the drive of the drive unit; The printhead assembly includes a mounting portion and an expansion module. The mounting portion includes at least one first guide extending along a first direction, and the expansion module includes at least one second guide extending along the first direction. The first guide and the second guide are capable of engaging with each other along the first direction. The printhead assembly further includes a locking mechanism for providing a force to bring the mounting portion and the expansion module closer together or separate them when the first guide and the second guide are engaged, thereby restricting the movement of the expansion module in a second direction perpendicular to the first direction.

2. The printhead assembly of claim 1, wherein, The locking mechanism includes at least one eccentric wheel handle assembly, which includes an eccentric wheel rotatably connected to the expansion module and a handle fixedly connected to the eccentric wheel.

3. The printhead assembly of claim 1, wherein, The mounting part further includes a positioning unit, which includes a first stop and / or at least one snap-fit ​​structure; The first stop member includes a baffle plate disposed at the end of the mounting portion along the first direction; The latching structure includes a first latch formed on the mounting portion and a second latch formed on the expansion module. When the expansion module slides along the first direction to the end of the mounting portion under the constraint of the first guide and the second guide, the first latch and the second latch engage with each other.

4. The printhead assembly of claim 3, wherein, Under the constraint of the first guide member and the second guide member, when the expansion module slides along the first direction until the first buckle and the second buckle are engaged with each other, the locking mechanism is used to lock the expansion module to the mounting part.

5. The printhead assembly of claim 3, wherein, The first buckle is a concave buckle, and the second buckle is a convex buckle.

6. The printhead assembly of claim 1, wherein, The first direction is the Z-axis direction of the molding equipment.

7. The printhead assembly of claim 1, wherein, The mounting portion is provided with two first guide members spaced apart along the X-axis, and the expansion module is provided with two second guide members spaced apart along the X-axis; or... The mounting section is provided with two first guide members spaced apart along the Y-axis, and the expansion module is provided with two second guide members spaced apart along the Y-axis.

8. The printhead assembly according to claim 1, characterized in that, The printhead assembly also includes two or more extrusion heads, which are connected to the drive unit, and the mounting portion is disposed on the extrusion head.

9. The printhead assembly of claim 8, wherein, The two extrusion heads include a first extrusion head and a second extrusion head, the first extrusion head and the second extrusion head having different diameters, and / or the first extrusion head and the second extrusion head being used to print different consumables, the different consumables including consumables of different colors and / or consumables of different materials.

10. The printhead assembly of claim 8, wherein, The two extrusion heads include a first extrusion head and a second extrusion head. The printhead assembly also includes a main frame. The first extrusion head is fixedly connected to the main frame, and the second extrusion head is movably connected to the main frame.

11. The printhead assembly of claim 10, wherein, The second extruder moves along the Z-axis so that the nozzle height of the second extruder is higher than the nozzle height of the first extruder, so that the first extruder can be used for printing.

12. The printhead assembly of claim 10, wherein, The second extruder moves along the Z-axis so that the nozzle height of the second extruder is lower than the nozzle height of the first extruder, so that printing can be performed using the second extruder.

13. The printhead assembly according to claim 1, characterized in that, The drive unit includes a motor and a timing belt. The motor is used to drive the timing belt, which is set in different directions, to move, thereby driving the printhead assembly to generate relative displacement with respect to the work platform.

14. A molding apparatus characterized by comprising: Includes the printhead assembly as described in any one of claims 1 to 13.

15. The forming apparatus of claim 14, wherein, The expansion module can be a laser module, a cutting module, a writing module, a milling module, or an engraving module.

16. The forming apparatus of claim 14 wherein, The expansion module is a laser module, and the driving unit is used to drive the laser module to move on a horizontal plane to cut and / or carve materials.

17. The molding equipment according to claim 16, characterized in that, A rotary device is installed on the working platform, which is used to drive a rotating body or an object with an irregular surface to rotate.

18. The forming apparatus of claim 16 wherein, The laser module is used to emit a laser beam to irradiate the material, so as to melt, vaporize or reach the ignition point of the material. The molten or burning material can be blown away by the airflow coaxial with the laser beam.

19. The molding apparatus of claim 14, wherein, The expansion module is a cutting module, which moves along the target path under the drive of the driving unit to cut the material.

20. The forming apparatus of claim 19, wherein, The material to be cut is in contact with the work platform, or... The forming equipment also includes a cutting platform for placing the material to be cut.

21. The molding apparatus of claim 14 wherein, The extension module is a writing module, and the extension module is provided with a clamping part for fixing the writing tool.

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