Filter components and molding equipment

Abstract

This application provides a filter assembly and a molding device. The filter assembly includes an internal circulation filter assembly applied to the molding device, which includes a housing forming a receiving cavity. The internal circulation filter assembly includes a first air inlet and a first air outlet, as well as a first air guide channel connecting the first air inlet and the first air outlet. Both the first air inlet and the first air outlet are in communication with the receiving cavity. The internal circulation filter assembly also includes a first fan and a first filter assembly. The first fan is used to draw exhaust gas from the receiving cavity through the first air inlet, and the exhaust gas is filtered by the first filter assembly and then discharged through the first air guide channel from the first air outlet. This application enables efficient filtration of exhaust gas generated by the molding device through a circulating filtration method.

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 filter component and molding 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] When the expansion module is a laser module, the materials such as plastic or wood will produce toxic, pungent fumes with a large amount of smoke when engraving or cutting using the laser. These fumes can harm the user's health. In addition, these fumes may contain flammable components, and there is a risk of combustion when the fumes accumulate in large quantities. Summary of the Invention

[0006] This application provides a filter component and molding equipment that can efficiently filter the exhaust gas generated by the molding equipment through a circulating filtration method.

[0007] The technical solution of this application embodiment is implemented as follows:

[0008] In a first aspect, a filter assembly is provided for use in a molding device, the molding device including a housing forming a receiving cavity; the filter assembly includes an internal circulation filter assembly, the internal circulation filter assembly including a first air inlet and a first air outlet, and a first air guide channel connecting the first air inlet and the first air outlet, both the first air inlet and the first air outlet communicating with the receiving cavity; the internal circulation filter assembly further includes a first fan and a first filter assembly, wherein the first fan is used to draw exhaust gas from the receiving cavity through the first air inlet, and the exhaust gas, after being filtered by the first filter assembly, is discharged from the first air outlet through the first air guide channel.

[0009] And / or, the filtration assembly includes an external circulation filtration assembly, the external circulation filtration assembly includes a second fan and a second filtration assembly, a second air guide channel is provided on the side wall of the housing to connect the inside of the receiving cavity and the outside of the receiving cavity, the second fan and the second filtration assembly are disposed in the second air guide channel; the second fan is configured to discharge the exhaust gas in the receiving cavity to the outside of the receiving cavity through the second air guide channel.

[0010] Based on the aforementioned technical means, the internal circulation filter component achieves repeated filtration of the exhaust gas within the containment cavity through internal circulation, effectively purifying the exhaust gas and increasing purification efficiency. During 3D printing operations, it reduces environmental pollution from toxic gases; during laser cutting or laser engraving operations, it prevents the accumulation of flammable gases within the containment cavity, reducing the risk of fire. The external circulation component filters and discharges the exhaust gas from the containment cavity, preventing the accumulation of harmful gases. Simultaneously, under the action of this external circulation component, a negative pressure environment is created inside the containment cavity as the internal gas is extracted, preventing harmful gases from escaping through gaps in the housing.

[0011] In some embodiments, the first fan is an axial flow fan.

[0012] Based on the above-mentioned technical means, axial flow fans have the characteristics of simple structure, large flow rate and low pressure. When applied in molding equipment, they can increase the purification efficiency of the cavity.

[0013] In some embodiments, the first fan is disposed between the first air inlet and the first air outlet.

[0014] According to the above-mentioned technical means, the exhaust gas in the containment cavity can be drawn in from the first air inlet, filtered by the first filter component, and discharged from the first air outlet through the first air guide channel.

[0015] In some embodiments, the first fan is disposed between the first air inlet and the first air guide channel, or the first fan is disposed between the first air guide channel and the first air outlet.

[0016] According to the above-mentioned technical means, the exhaust gas in the containment cavity can be drawn in from the first air inlet, filtered by the first filter component, and discharged from the first air outlet through the first air guide channel.

[0017] In some embodiments, the first filter component is one or more of a pre-filter, a medium-efficiency filter, a high-efficiency filter, and an activated carbon filter.

[0018] Based on the above technical means, the filter components can be set as multi-stage filters or combinations thereof, which can achieve graded filtration of particulate matter and harmful gases in different application scenarios.

[0019] In some embodiments, the first filter assembly is disposed outside the first air inlet. After being filtered by the first filter assembly, the airflow enters the first air guide channel from the first air inlet and is discharged through the first air outlet. Alternatively, the first filter assembly is disposed before the first fan and the first air guide channel, or the first filter assembly is disposed between the first air guide channel and the first air outlet.

[0020] Based on the aforementioned technologies, the internal circulation filter assembly achieves repeated filtration of the exhaust gas within the containment chamber through internal circulation, thereby efficiently purifying the exhaust gas and increasing purification efficiency.

[0021] In some embodiments, when the external circulation filter assembly is in operation, the external circulation filter assembly draws air from the receiving cavity, filters it, and discharges it outside the receiving cavity. The housing has an air inlet, and the external circulation filter assembly creates a negative pressure inside the housing by exhausting air outward.

[0022] The above-mentioned technical means can prevent exhaust gas leakage, and at the same time rely on the second filter component to purify part of the exhaust gas.

[0023] In some embodiments, the second filter component is a combination of one or more of a pre-filter, a medium-efficiency filter, a high-efficiency filter, and an activated carbon filter.

[0024] Based on the above technical means, the filter components can be set as multi-stage filters or combinations thereof, which can achieve graded filtration of particulate matter and harmful gases in different application scenarios.

[0025] In a second aspect, a molding apparatus is provided, the molding apparatus including a housing that encloses to form a receiving cavity, and the molding apparatus further including a filter assembly as described in any of the first aspects.

[0026] Based on the aforementioned technical methods, by installing an internal circulation filter component in the molding equipment, the exhaust gas in the receiving cavity is drawn in, filtered, and then discharged back into the receiving cavity, achieving the purpose of repeated filtration of the exhaust gas. The exhaust gas circulates within the receiving cavity, preventing the leakage of harmful gases and thus avoiding environmental pollution and personal injury. Conversely, by installing an external circulation component in the molding equipment, the exhaust gas in the receiving cavity is filtered and discharged, preventing the accumulation of harmful gases within the receiving cavity. Simultaneously, under the action of this external circulation component, a negative pressure environment is created inside the receiving cavity due to the extraction of gas, preventing harmful gases from leaking out through gaps in the housing.

[0027] In some embodiments, the number of internal circulation filter components is one, which is disposed on the side wall of the housing; or, the number of internal circulation filter components is two, which are symmetrically disposed on the side wall of the housing.

[0028] Based on the above technical means, in the molding equipment, an appropriate number of internal circulation filter components can be selected according to the size of the box and different purification requirements to improve the space utilization of the equipment and optimize the airflow circulation path.

[0029] In some embodiments, the molding equipment integrates at least one of the following functions: 3D printing, laser engraving, cutting, and writing.

[0030] This type of molding equipment generates pollutants such as particulate matter and / or harmful gases during operation. According to the above-mentioned technical means, the exhaust gas in the receiving cavity can be filtered to prevent the overflow of harmful gases.

[0031] In some embodiments, during 3D printing in the molding equipment, the exhaust gas in the receiving cavity is repeatedly filtered using the internal circulation filter assembly.

[0032] Based on the above-mentioned technical means, the pollution of the environment by toxic gases can be reduced during 3D printing operations.

[0033] In some embodiments, the molding apparatus further includes a printhead assembly, 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 includes at least one first guide extending along a first direction, and the extension module includes at least one second guide extending along the first direction, the first guide and the second guide being capable of engaging with each other; the printhead assembly further includes a locking mechanism for providing a force to bring the mounting portion and the extension module closer together or separate them 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.

[0034] According to the above technical means, by setting a guide and locking mechanism that can fit into each other 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.

[0035] 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.

[0036] 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.

[0037] 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.

[0038] 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.

[0039] 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.

[0040] Based on the above-mentioned technical means, molten or burning materials can be blown away by a high-speed airflow coaxial with the beam.

[0041] In some embodiments, the molding equipment is used to filter the exhaust gas from the receiving cavity and discharge it outside the receiving cavity using the external circulation filter assembly when the molding equipment is performing laser engraving or cutting operations.

[0042] Based on the above-mentioned technical means, when performing laser cutting or laser engraving operations, the accumulation of flammable gases in the containment cavity can be avoided, thus reducing the risk of fire.

[0043] 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.

[0044] 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.

[0045] 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.

[0046] 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.

[0047] 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.

[0048] 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. Attached Figure Description

[0049] Figure 1 This is a schematic diagram of the molding equipment provided in the embodiments of this application;

[0050] Figure 2 for Figure 1 A partial structural diagram of the printhead assembly in the image;

[0051] Figure 3 for Figure 2 View from direction A;

[0052] Figure 4 for Figure 2 Side view;

[0053] Figure 5 A cross-sectional schematic diagram of the first guide member and the second guide member provided in the embodiments of this application;

[0054] Figure 6 This is a schematic diagram of the molding equipment provided in the embodiments of this application;

[0055] Figure 7 This is a schematic diagram of the molding equipment provided in the embodiments of this application;

[0056] Figure 8 This is a schematic diagram of the molding equipment provided in an embodiment 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 ​​1 1252, flange 11253, groove 11254, eccentric wheel handle assembly 113, eccentric wheel 1131, handle 1132, bearing 1133, drive unit 120, work platform 130, housing 140, internal circulation filter assembly 150, first air inlet 151, first air outlet 152, guide 1521, first air guide channel 153, first fan 154, first filter assembly 155, external circulation filter assembly 160, second fan 161, second filter assembly 162. 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] In addition to the aforementioned technical issues, when using the laser module for engraving or cutting operations, materials such as plastic or wood will produce toxic, pungent fumes accompanied by a large amount of smoke and dust under the action of the laser. These fumes can harm the health of users. At the same time, these fumes may contain flammable components, and there is a risk of combustion when the fumes accumulate in large quantities.

[0152] The inventors of this application conceived of using filters or filter cartridges to adsorb these waste gases. However, the waste gases are generated relatively quickly in the above process, often failing to adsorb them completely, and some waste gases will slowly leak through the gaps in the machine.

[0153] In view of the above problems, this application provides a filter component and molding equipment. The technical solution of this application will be described in detail below with reference to the accompanying drawings.

[0154] This application provides an internal circulation filter assembly 150, which is applied to a molding equipment 100. Figure 6 , Figure 7 and Figure 8 The structure of the internal circulation filter assembly 150 is shown. For ease of explanation, a portion of the structure of the molding device 100 is also shown in the figure. The molding device 100 can be a device for performing any of the following functions: 3D printing, laser engraving, cutting, and writing. Alternatively, it can be a molding device 100 that integrates the above functions.

[0155] like Figure 6 , Figure 7 and Figure 8As shown, the molding equipment 100 includes a housing 140, which encloses a receiving cavity. The internal circulation filter assembly 150 includes a first air inlet 151 and a first air outlet 152, and a first air guide channel 153 connecting the first air inlet 151 and the first air outlet 152. Both the first air inlet 151 and the first air outlet 152 are connected to the receiving cavity, and the first air guide channel 153 is disposed between the first air inlet 151 and the first air outlet 152.

[0156] The internal circulation filter assembly 150 also includes a first fan 154 and a first filter assembly 155. The first fan 154 is disposed between the first air inlet 151 and the first air outlet 152, and is used to draw the exhaust gas in the receiving cavity from the first air inlet 151, filter it through the first filter assembly 155, and then discharge it from the first air outlet 152 through the first air guide channel 153.

[0157] The first fan 154 can be located anywhere between the first air inlet 151 and the first air outlet 152. For example Figure 6 The first fan 154 is located between the first air inlet 151 and the first air guide channel 153; or, as a possible implementation, the first fan 154 may also be located between the first air guide channel 153 and the first air outlet 152.

[0158] Along the direction of airflow, the first filter assembly 155 can be positioned anywhere before the first air outlet 152. For example... Figure 6 The first filter component 155 is located outside the first air inlet 151. At this time, the airflow is filtered by the first filter component 155 and enters the first air guide channel 153 from the first air inlet 151, and is discharged through the first air outlet 152. Alternatively, as a possible implementation, the first filter component 155 can also be set before the first fan 154 and the first air guide channel 153 or between the first air guide channel 153 and the first air outlet 152.

[0159] According to the above-mentioned technical means, the internal circulation filter component 150 achieves the effect of repeated filtration of exhaust gas in the containment cavity through internal circulation, which can efficiently purify exhaust gas and increase purification efficiency.

[0160] During 3D printing operations, it can reduce the pollution of the environment by toxic gases; during laser cutting or laser engraving operations, it can prevent the accumulation of flammable gases in the containment cavity, reducing the risk of fire.

[0161] In some embodiments, the first fan 154 is an axial flow fan. Axial flow fans are characterized by simple structure, large flow rate, and low pressure, and their application in the molding equipment 100 can increase the purification efficiency of the receiving cavity.

[0162] In some embodiments, a first air inlet 151 is disposed below a first air outlet 152 along a first direction. The density of the exhaust gas generated in the molding equipment 100 is generally greater than that of air, so the exhaust gas will accumulate in the lower part of the receiving cavity. Distributing the first air inlet 151 at the lower part can increase the circulation efficiency of the internal gas.

[0163] In some embodiments, the end of the first air outlet 152 has at least one guide 1521 for guiding the airflow blown from the first air outlet 152 to flow in a horizontal direction or to flow obliquely downward at a first angle to the horizontal direction, the first angle being less than 90 degrees.

[0164] According to the above-mentioned technical means, the airflow is guided by the guide component 1521 to flow horizontally or obliquely downward, so that the airflow can cool down the workpiece on the work platform 130, thereby accelerating the curing speed of the workpiece.

[0165] In some embodiments, the first filter component 155 is a combination of one or more of a pre-filter, a medium-efficiency filter, a high-efficiency filter, and an activated carbon filter.

[0166] Based on the above technical means, the filter components can be set as multi-stage filters or combinations thereof, which can achieve graded filtration of particulate matter and harmful gases in different application scenarios.

[0167] Based on the internal circulation filter assembly 150 described in the above embodiments, this application also provides a molding device 100. This molding device 100 can be a device suitable for performing any of the following functions: 3D printing, laser engraving, cutting, and writing. Alternatively, it can be a molding device 100 integrating the above multiple functions. This type of molding device 100 generates particulate matter and / or harmful gases and other pollutants during operation. The structure of the molding device 100 can be found in [reference needed]. Figure 6 , Figure 7 and Figure 8 .

[0168] The molding equipment 100 provided in this embodiment includes a housing 140, which encloses a receiving cavity. The molding equipment 100 also includes at least one internal circulation filter assembly 150. The internal circulation filter assembly 150 includes a first air inlet 151 and a first air outlet 152, and a first air guide channel 153 connecting the first air inlet 151 and the first air outlet 152. Both the first air inlet 151 and the first air outlet 152 are connected to the receiving cavity. The internal circulation filter assembly 150 also includes a first fan 154 and a first filter assembly 155. The first fan 154 is disposed between the first air inlet 151 and the first air outlet 152, and is used to draw exhaust gas from the receiving cavity through the first air inlet 151. After being filtered by the first filter assembly 155, the exhaust gas is discharged from the first air outlet 152 through the first air guide channel 153.

[0169] According to the above-mentioned technical means, by setting an internal circulation filter assembly 150 in the molding equipment 100, the waste gas in the receiving cavity is drawn in by the internal circulation filter assembly 150, filtered, and then discharged into the receiving cavity, thus achieving the purpose of repeated filtration of the waste gas. The waste gas circulates inside the receiving cavity, avoiding the overflow of harmful gases and preventing environmental pollution and personal injury.

[0170] In some embodiments, the first fan 154 is an axial flow fan. Axial flow fans have a simple structure and a large flow rate, which can improve the purification efficiency of the internal circulation filter assembly 150.

[0171] In some embodiments, the end of the first air outlet 152 has at least one guide 1521, which is used to guide the airflow blown from the first air outlet 152 to flow horizontally or obliquely downward at a first angle to the horizontal.

[0172] The airflow is guided by the guide 1521 to flow horizontally or diagonally downward, so that the airflow can cool the workpiece on the work platform 130, thereby accelerating the curing speed of the workpiece.

[0173] In some embodiments, the first filter component 155 is a combination of one or more of a pre-filter, a medium-efficiency filter, a high-efficiency filter, and an activated carbon filter.

[0174] In some embodiments, the molding equipment 100 has one internal circulation filter assembly 150, which is disposed on the side wall of the housing 140 along the width direction of the housing 140; or, as Figure 6 , Figure 7 and Figure 8 As shown, there are two internal circulation filter components 150, which are symmetrically arranged on two opposite side walls of the housing 140 along the width direction of the housing 140.

[0175] Based on the above-mentioned technical means, in the molding equipment 100, an appropriate number of internal circulation filter components 150 can be selected according to the size of the box 140 and different purification requirements, so as to improve the space utilization of the equipment and optimize the airflow circulation path.

[0176] This application embodiment also provides an external circulation filter assembly 160, which is applied to a molding equipment 100. Figure 6 , Figure 7 and Figure 8The structure of the external circulation filter assembly 160 is shown. For ease of explanation, a portion of the structure of the molding device 100 is also shown in the figure. The molding device 100 can be a device for performing any of the following functions: 3D printing, laser engraving, cutting, and writing; or it can be a molding device 100 that integrates the above multiple functions. Figure 6 , Figure 7 and Figure 8 As shown, the molding equipment 100 includes a housing 140, which encloses to form a receiving cavity.

[0177] The external circulation filter assembly 160 includes a second fan 161 and a second filter assembly 162. A second air guide channel is opened on the side wall of the housing 140 to connect the inside and outside of the housing cavity. The second fan 161 and the second filter assembly 162 are arranged in the second air guide channel. The exhaust gas in the housing cavity is filtered by the second filter assembly 162 under the action of the second fan 161 and then discharged outside the housing cavity.

[0178] When the external circulation filter assembly 160 is working, it draws air from the receiving cavity, filters it, and then discharges it to the outside of the receiving cavity. By exhausting the air outward, a negative pressure is formed inside the housing 140. Other gaps in the housing 140 become air inlets, which can prevent exhaust gas leakage. At the same time, the second filter assembly 162 purifies part of the exhaust gas.

[0179] In some embodiments, the first filter component 155 and the second filter component 162 may be any one of a pre-filter, a medium-efficiency filter, a high-efficiency filter, and an activated carbon filter, or may be any combination of any number of the above-mentioned filters.

[0180] In some embodiments, the second fan 161 is a centrifugal fan. Centrifugal fans have high air pressure characteristics, ensuring that exhaust gas is discharged over long distances and preventing odor backflow.

[0181] Based on the external circulation component provided in the above embodiments, this application also provides a molding device 100. This molding device 100 can be a device suitable for performing any of the following functions: 3D printing, laser engraving, cutting, and writing. Alternatively, it can be a molding device 100 integrating the above multiple functions. This type of molding device 100 generates particulate matter and / or harmful gases and other pollutants during operation. The structure of this molding device 100 can be found in [reference needed]. Figure 6 , Figure 7 and Figure 8 .

[0182] The molding equipment 100 provided in this embodiment includes a housing 140, which encloses and forms a receiving cavity. The molding equipment 100 also includes an external circulation filter assembly 160, which includes a second fan 161 and a second filter assembly 162. A second air guide channel is provided on the side of the housing 140 to connect the inside and outside of the receiving cavity. The second fan 161 and the second filter assembly 162 are disposed in the second air guide channel. The second fan 161 is configured to discharge the exhaust gas in the receiving cavity to the outside of the receiving cavity through the second air guide channel.

[0183] According to the above technical means, by setting an external circulation component in the molding equipment 100, the exhaust gas in the containment cavity is filtered and discharged by the external circulation component, thus avoiding the accumulation of harmful gases in the containment cavity; at the same time, under the action of the external circulation component, the gas inside the cavity is extracted, and a negative pressure environment is formed inside the containment cavity, thus preventing harmful gases from overflowing through the gaps in the box 140.

[0184] In some embodiments, the second filter component 162 is a combination of one or more of a pre-filter, a medium-efficiency filter, a high-efficiency filter, and an activated carbon filter.

[0185] In some embodiments, the second fan 161 is a centrifugal fan. Based on the characteristics of a centrifugal fan—large air volume and high air pressure—it can rapidly exchange air in the containment cavity.

[0186] This application also provides a molding apparatus 100, including a printhead assembly 110 as described in any of the preceding embodiments, and at least one internal circulation filter assembly 150 as described in any of the preceding embodiments and / or an external circulation filter assembly 160 as described in any of the preceding embodiments.

[0187] It is understood that the molding equipment 100 may include both an internal circulation filter assembly 150 and an external circulation filter assembly 160, or only one of them.

[0188] In some embodiments, the molding apparatus 100 includes a housing 140; the number of internal circulation filter components 150 in the molding apparatus 100 is one, and the one internal circulation filter component 150 is disposed on the side wall of the housing 140 along the width direction of the molding apparatus 100; or, the number of internal circulation filter components 150 in the molding apparatus 100 is two, and the two internal circulation filter components 150 are disposed on two opposite side walls of the housing 140 along the width direction of the molding apparatus 100.

[0189] 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.

[0190] 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.

[0191] 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.

[0192] 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.

[0193] 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 filter assembly characterized by, Applied to molding equipment, the molding equipment includes a housing, the housing being enclosed to form a receiving cavity; The filter assembly includes an internal circulation filter assembly, which includes a first air inlet and a first air outlet, as well as a first air guide channel connecting the first air inlet and the first air outlet. Both the first air inlet and the first air outlet are in communication with the receiving cavity. The internal circulation filtration assembly further includes a first fan and a first filter assembly, wherein the first fan is used to draw the exhaust gas in the accommodating cavity from the first air inlet, and the exhaust gas is discharged from the first air outlet through the first air guide channel after being filtered by the first filter assembly. And / or, The filter assembly includes an external circulation filter assembly, which includes a second fan and a second filter assembly. A second air guide channel is provided on the side wall of the housing, connecting the inside of the receiving cavity and the outside of the receiving cavity. The second fan and the second filter assembly are disposed in the second air guide channel. The second fan is configured to discharge the exhaust gas in the containment cavity to the outside of the containment cavity through the second air guide channel.

2. The filter assembly of claim 1, wherein, The first fan is an axial flow fan.

3. The filter assembly of claim 1, wherein, The first fan is positioned between the first air inlet and the first air outlet.

4. The filter assembly of claim 1, wherein, The first fan is positioned between the first air inlet and the first air guide duct, or... The first fan is positioned between the first air guide channel and the first air outlet.

5. The filter assembly of claim 1, wherein, The first filter component is a combination of one or more of the following: a pre-filter, a medium-efficiency filter, a high-efficiency filter, and an activated carbon filter.

6. The filter assembly according to claim 1, characterized in that, The first filter component is disposed outside the first air inlet, or the first filter component is disposed before the first fan and the first air guide channel, or the first filter component is disposed between the first air guide channel and the first air outlet.

7. The filter assembly of claim 1, wherein, When the external circulation filter assembly is working, it draws air from the receiving cavity, filters it, and then discharges it outside the receiving cavity. The housing has an air inlet, and the external circulation filter assembly creates negative pressure inside the housing by exhausting air outward.

8. The filter assembly of claim 1, wherein, The second filter component is a combination of one or more of the following: a pre-filter, a medium-efficiency filter, a high-efficiency filter, and an activated carbon filter.

9. A molding apparatus characterized by comprising: The molding equipment includes a housing that encloses to form a receiving cavity, and the molding equipment also includes the filter assembly as described in claim 1.

10. The molding equipment according to claim 9, characterized in that, The number of internal circulation filter components is one, which is installed on the side wall of the housing, or... The number of internal circulation filter components is two, and the two internal circulation filter components are symmetrically arranged on opposite side walls of the housing.

11. The molding apparatus of claim 9, wherein The molding equipment integrates at least one of the following functions: 3D printing, laser engraving, cutting, and writing.

12. The forming apparatus of claim 11, wherein, The molding equipment is used to repeatedly filter the exhaust gas in the receiving cavity using the internal circulation filter assembly during 3D printing.

13. The molding apparatus of claim 11, wherein, The molding equipment also includes a printhead assembly, 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 section and an expansion module. The mounting section 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 can be fitted together. 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.

14. The forming apparatus of claim 13, 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.

15. The forming apparatus of claim 14, wherein, The work platform is equipped with a rotary device, which is used to drive rotating bodies or objects with irregular surfaces to rotate.

16. The molding equipment according to claim 14, characterized in that, 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.

17. The forming apparatus of claim 14 wherein, The molding equipment is used to filter the exhaust gas from the receiving cavity and discharge it outside the receiving cavity after using the external circulation filter assembly when the molding equipment is performing laser engraving or cutting operations.

18. The molding apparatus of claim 13, 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.

19. The molding apparatus of claim 13, 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.

20. The molding equipment according to claim 19, characterized in that, 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.

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