522results about "Manufacturing heating elements" patented technology

The invention relates to the technical field of powder bed heating, and discloses a powder bed heating method of additive manufacturing equipment, the powder bed heating method of the additive manufacturing equipment is realized based on a powder bed heating unit of the additive manufacturing equipment, and the powder bed heating unit of the additive manufacturing equipment comprises a handle bottom plate for providing a basic mounting platform for the whole device; a push-pull type local heating design is adopted for the device, a traditional overall preheating mode is replaced, energy consumption and the equipment use cost are greatly reduced, meanwhile, heat loss is reduced, the heating efficiency is improved, and through cooperation of double positioning and a real-time temperature control system, the energy-saving and environment-friendly effects are achieved. The accurate position of the heating unit is guaranteed through mechanical limiting and sensor detection, high-precision temperature control adjustment is matched, it is guaranteed that the temperature of the powder bed is stabilized within the preset range, part defects caused by temperature fluctuation are avoided, and the forming quality and the mechanical property stability of workpieces are remarkably improved.

A dual-switch 3D print head having synergistic printing of resin and continuous fibers, the print head comprising a main frame (1), wherein a resin head extrusion mechanism (3) is provided on the main frame (1); the main frame (1) is connected to a continuous fiber printing mechanism (6) by means of a dual-nozzle switching mechanism (2); a continuous fiber cutting mechanism (7) and a wire feeding and clamping coordination mechanism (63) are provided on the continuous fiber printing mechanism (6); the continuous fiber printing mechanism (6) comprises a continuous fiber printing mounting plate (61); a fiber clamping mounting base (631) is provided on one side of the top of the continuous fiber printing mounting plate (61); a fiber clamping actuator is mounted on the fiber clamping mounting base (631); a clamping connecting rod (635) is movably connected to the end of the fiber clamping actuator; the other end of the clamping connecting rod (635) is connected to a fiber guide wheel (633); a wire feeding gear (634) is provided beside the fiber guide wheel (633); and the wire feeding gear (634) is mounted on the continuous fiber printing mounting plate (61). The dual-switch 3D print head can ensure the precision of the relative positions between dual nozzles during multiple switchings for a long time, and also achieve the organic combination of active wire feeding and passive wire feeding for a continuous fiber wire material is also realized, thereby realizing high-quality printing of continuous fibers.

The utility model discloses a hot bed and a 3D printer. The hot bed comprises a bed plate and a heating device, the supporting piece is arranged on one side of the bed board; the elastic leveling device is connected with the bed board and the supporting piece and is used for adjusting the flatness of the bed board; the locking assembly is connected with the bed board and the supporting piece and used for locking the position of the bed board relative to the supporting piece after the bed board is leveled. According to the hot bed in the embodiment, the locking assembly is used for locking the position of the bed board relative to the supporting piece after the bed board is leveled, so that deformation and displacement of the bed board can be reduced, the overall rigidity of the hot bed is improved, and then the printing quality of the 3D printer is improved.

This invention relates to an apparatus and method for fabricating microanodes using localized electrochemical deposition additive manufacturing, belonging to the fields of 3D printing technology and electrochemical deposition. The y-axis moving device is threadedly connected to the frame assembly, and the dual-nozzle device is also threadedly connected to the y-axis moving device. The z-axis moving device is fixed to the frame assembly, and the heated bed platform is fixed to the z-axis moving device. An inert metal wire cutting device is installed on the connecting shaft between the z-axis moving device and the heated bed platform. The advantages are: it automates the fabrication of microanodes using localized electrochemical deposition additive manufacturing, improving the efficiency of microanode fabrication and saving manpower, material resources, and financial resources; it solves the difficulties of traditionally using capillary glass tubes to encapsulate extremely fine inert metal wires, allowing for convenient encapsulation of inert metal wires with diameters below 20 micrometers; it utilizes laser cutting for post-processing the electrode, avoiding the difficulty of grinding a smooth electrode surface; and the electrode shape can be designed by computer, without shape limitations.

The present document relates to a dispensing head for continuous fiber reinforced fused filament type additive manufacturing. The dispensing head is configured for dispensing a material onto a substrate carrier platform, and comprises one or more inlets for receiving a strand of meltable solid material and a reinforcement fiber and a material passage extending from the receiving inlets to a dispensing outlet. The dispensing head further comprises a material heating unit for liquefying the material and drive means for driving the material through the material passage. The material heating unit comprises a solid radiation body extending from the dispensing outlet at least in a direction parallel to the substrate carrier platform, defining a radiation face toward the substrate carrier platform, wherein the radiation body is thermally separated from the dispensing outlet.

A thermal folding forming method for additive manufacturing of a three-dimensional lattice structure of a fiber-reinforced composite, the method comprising the following specific steps: a first step, printing a fiber-reinforced composite having a repeated two-dimensional planar lattice structure by means of a dual-nozzle continuous fiber-reinforced composite additive manufacturing apparatus; a second step, using a robotic arm gripper (4) to grip the printed fiber-reinforced composite having a two-dimensional planar lattice structure and place same onto a retractable hot roller thermal folding and heating device, and heating same at a fiber connection point, wherein the thermal folding device is arranged in a 10 x 10 columnar lattice and can be fully retracted with a retractable height ranging from 0-50 mm, such that the fiber-reinforced composite having a two-dimensional planar lattice structure is heated and elevated by means of the retractable hot roller, and can be folded into the fiber-reinforced composite having a three-dimensional lattice structure; and a third step, using the robotic arm gripper (4) to grip the fiber-reinforced composite having a three-dimensional lattice structure and place same into a water-cooling box for water cooling and shape setting. The forming method can improve the structural complexity of the fiber-reinforced composite, thereby achieving the three-dimensional structure transformation of the composite.

The disclosure concerns a 3D printhead, a radiation emission device, and processes for additive fabrication and extrusion. The printhead comprises a radiating plate configured to transmit a thermal energy to the printing material deposited on a surface. A radiation emission device may be attached to an additive fabrication or extrusion device and comprising a radiating plate and a heating element. Additive fabrication and extrusion processes using a radiation for heating a surface for deposition of the material. Characteristics of products thus produced, such as porosity rate, warping, isotropy, maximum stress, internal stress, impact resistance, bending resistance, deformation at break, rigidity modulus, crystallinity rate, and impermeability are improved.

The invention relates to the technical field of 3D printing temperature control, and particularly discloses a 3D printer hot bed temperature closed-loop control method and system based on a PID (Proportion Integration Differentiation) algorithm. The method comprises the following steps: acquiring a temperature change trend prediction parameter based on multi-point temperature data and temperature change historical data, dynamically optimizing a PID parameter reference value according to the parameter to obtain an adaptive PID parameter, and performing online adaptive adjustment on the hot bed temperature according to the adaptive PID parameter, including converting a control output value into a pulse width modulation signal to adjust the overall heating power. And dynamically allocating partition power based on the trend vector, and switching the heating mode according to the dynamic stage. On-line real-time self-adaptive optimization of PID parameters is achieved, the problems of heating overshoot and slow cooling caused by dynamic asymmetry of a hot bed can be solved, temperature field distribution uniformity is improved, and adaptability to different printing working conditions and temperature control precision are improved.

The invention discloses a multi-heat-source digital twin model automatic optimization and decoupling control method and system, and the method comprises the steps: constructing a local two-dimensional plane coordinate system, obtaining the end point coordinates of heat sources, and calculating the heat radiation intensity of the heat sources to a target point; establishing a geometric parameter model of the additive manufacturing multi-heat-source system, and establishing a radiation field response model of the multi-heat-source system based on a linear superposition principle; according to the heating requirement of additive manufacturing, a target heat radiation field is designed, optimal power distribution of the target heat radiation field is calculated, and optimal heat source structure parameters are determined based on geometric constraints of a physical basis; and according to the optimal heat source structure parameters, a decoupling control rule is designed, and heat source power is adjusted according to feedback data to compensate deviation. According to the method, the point heat source, the line heat source and the plane heat source are abstracted into the line heat source in a unified mode, a universal frame is provided for digital modeling of a complex multi-heat-source system, and the complexity of modeling for different heat source types is avoided.

The application discloses a kind of short-range extrusion device and working method for realizing multicolor mixing, solve the printing precision of prior art long-range feeding printing device, the movement precision of short-range feeding printing device is low, with the beneficial effect of improving printing precision, specific scheme is as follows: a kind of short-range extrusion device for realizing multicolor mixing, including driving module, feeding extrusion module, color mixing proportion control module and mixed extrusion module connected in sequence, power assembly is provided with multiple output shafts, each output shaft is respectively matched with corresponding feeding component, feeding extrusion module includes feeding fixed seat, feeding fixed seat supports tensioning mechanism, the clamping force between feeding component and tensioning mechanism is adjustable, multiple coaxial baffles are arranged between color mixing proportion control module and mixed extrusion module, the baffle is provided with the shielding groove that can be communicated with melt cavity, the baffle can be rotated so that the shielding groove shields part of melt cavity to realize flow regulation.

The utility model relates to the technical field of 3D printing, in particular to a connecting assembly and a 3D printer. The connecting assembly is used for the 3D printer, the 3D printer further comprises a hot bed, a hot bed connecting piece and a hot bed lifting assembly, the hot bed lifting assembly is connected with the hot bed through the hot bed connecting piece, the hot bed lifting assembly can drive the hot bed to move in the height direction of the 3D printer, and the connecting assembly comprises a first connecting component, a second connecting component and a moving component; the first connecting component is connected to the hot bed connecting piece, the second connecting component is connected to the hot bed lifting assembly, the moving component is located between the first connecting component and the second connecting component, the moving component can move along a first plane relative to the first connecting component and the second connecting component, and the first plane is perpendicular to the height direction. In this way, the connecting assembly is easy to manufacture, the connecting assembly can stably transmit the transmission force of the hot bed lifting assembly to the hot bed connecting piece, the moving component can effectively transmit torque, and the moving component can move in the first plane perpendicular to the height direction. The tolerance and fluctuation are eliminated through the movement along the first plane perpendicular to the height direction when the stable transmission of the movement in the height direction is ensured, and the movement is more accurate.

The invention relates to a system (1) for producing a composite part (2) by automated layup, the system (1) comprising a creel (3) comprising at least one reel (80) of a tape (8) of fibres made of composite material, a layup head (5) providing at least one tape (8) of fibres made of composite material, a mould (7) configured to receive the tape (8) and form the composite part (2) by additive manufacturing, and a compacting roller (6) configured to apply the tape (8) to the mould (8) or to already deposited tape. The system (1) further comprises means (10) for preparing the at least one tape (8), these preparation means (10) being mounted upstream of the layup head (5) and comprising at least one heating module (11, 12) for heating the at least one tape (8).

To provide a technique capable of improving at least one of high accuracy and high speed in shaping a three dimensional shaped article.SOLUTION: The three-dimensional shaping apparatus includes a plasticizing unit that plasticizes a material to generate a shaping material, a nozzle that discharges the shaping material toward a stage, and a control unit that controls shaping of a three-dimensional shaped object by discharging the shaping material from the nozzle, wherein the plasticizing unit includes a drive motor, a screw, a barrel, a heating unit, and a position changing mechanism that changes a relative position between the screw and the barrel. The control unit causes the plasticizing unit to generate the shaping material by setting the distance between the screw and the barrel to a first distance by the position changing mechanism when the condition related to shaping is a first condition, and causes the plasticizing unit to generate the shaping material by setting the distance between the screw and the barrel to a second distance by the position changing mechanism when the condition is a second condition, and the second distance is larger than the first distance.SELECTED DRAWING: Figure 1

The invention provides integrated 3D printing equipment and technology capable of eliminating step lines, and belongs to the technical field of 3D printing equipment. The problems of uneven spraying, low efficiency and the like due to the fact that step lines are eliminated manually in the prior art are solved. An upper bin and a lower bin which are arranged up and down are arranged in a machine box, and a workbench and a lifting mechanism used for driving the workbench to vertically ascend and descend are further arranged in the machine box; a printing device is arranged in the upper bin and used for printing workpieces, and a spraying and curing device is arranged in the lower bin and used for spraying and curing the printed workpieces. The method has the advantages that after printing is completed, the step pattern post-treatment process can be automatically carried out, and the production efficiency is improved.

A dual printing head device with a tensioning device for continuous fiber-reinforced composites includes a printing support frame; a continuous fiber printing mechanism is provided on the printing support frame, and a filament extrusion mechanism is provided next to the continuous fiber printing mechanism; the filament extrusion mechanism is connected to the printing support frame through a dual nozzle switching mechanism; a fiber guide block is provided below the continuous fiber printing mechanism; a speed feedback follower wheel is provided next to the fiber guide block; the speed feedback follower wheel is connected to a filament feeding fiber force control encoder; and the dual nozzle switching mechanism includes a horizontal guide rail, a push plate mounting plate, a positioning guide groove, a filament fixing plate, and a rear mounting plate. The dual printing head device achieves free switching between dual heads during printing, ensuring the stability of feeding continuous fibers.

A system includes: a frame; a tank defining a volume configured to hold uncured resin; a laser emitting device configured to produce a laser beam; an actuation system to provide relative movement between the laser emitting device and the tank; and a controller configured to: receive print information regarding a three-dimensional object to be printed into the volume of the tank; operate the actuation system based on the print information to move the laser emitting device relative to the tank so that the focal point of the focused laser beam moves within the volume of the tank; and operate the focused laser beam based on the print information, so that movement of the focal point of the focused laser beam inside the volume of the tank energizes a local portion of uncured resin to polymerize the local portion of the uncured resin and to thereby additively manufacture the three-dimensional object.

The utility model provides a bottom supporting structure of a 3D printer. The bottom supporting structure comprises a base, a fence fixedly installed on the top face of the base, a supporting seat connected with a supporting plate through a spring, the supporting plate fixedly installed at the bottom of a heated plate, a glass platform arranged at the top of the heated plate, and a long screw connected with a stabilizing mechanism. The base is adopted as a bottom supporting structure of the 3D printer to support the printing device, meanwhile, the glass platforms with the intervals are installed on the heated plate to be used for bearing finished products, the heated plate can enable the glass platforms to be evenly heated, and the situation that the glass platforms are formed due to temperature difference changes is avoided; the horizontal supporting structure is ensured to improve the printing precision, the springs are arranged to achieve elastic supporting of the supporting structure, vibration generated when the printing device works cannot affect the supporting structure, control is achieved through the stabilizing mechanism according to the weight of a printed finished product, and a stabilizing rod abuts against the bottom of the heated plate to achieve further supporting. And the processing precision of the 3D printer is improved.

To provide a three-dimensional additive manufacturing apparatus that is capable of producing a laminated structure made of a single material and having a plurality of layers with different aspects.SOLUTION: A three-dimensional additive manufacturing apparatus 10 that is configured to produce a laminated structure 1 made of a single material and having a high-density layer 2 with no voids and low-density layers 3 and 4 with voids, comprises: a discharge device 11 that discharges a thermoplastic resin in a molten state; and a molding table 30 disposed below the discharge device 11 to receive the thermoplastic resin discharged by the discharge device 11. A blower 22 for blowing air onto the falling thermoplastic resin discharged in a string shape from a nozzle 12 of the discharge device 11 is provided above the molding table 30 and a diameter of the falling thermoplastic resin can be reduced by the air blown by the blower 22.SELECTED DRAWING: Figure 2

The invention provides a preheating type FDM printer multi-nozzle switching device and switching method, and relates to the technical field of FDM printer nozzles, the preheating type FDM printer multi-nozzle switching device comprises a mounting frame, a shell is fixedly mounted at the top of the inclined side of the mounting frame, a rotating disc is arranged at the bottom of the inclined side of the mounting frame, and a plurality of mounting seats distributed in an annular array are arranged at the bottom of the rotating disc. According to the device, before FDM printing operation is started, a control system controls heating bodies of all spray head units to be preheated to a set temperature, during printing, a needed spray head is rotated to a working position according to an instruction, a valve body in the spray head is opened, and a feeding mechanism pushes consumables to be extruded out of the spray head through a feeding channel, a supply pipe and a flow channel for printing; when a new material is printed, the valve body of the current spray head is closed, the rotating disc is driven to switch the next spray head to the working position, the internal valve body is opened, and then the new material can be printed, the whole process is rapid and accurate, and as the non-working spray head is in a closed state, leakage and wire drawing are effectively avoided.

The invention discloses a multi-tool-head three-dimensional printer automatic identification and self-calibration method based on AI deep learning, and the method comprises the following steps: S1) a main control unit of a multi-tool-head three-dimensional printer issues a head changing instruction, and after a quick changing mechanism completes the switching of a printing head, a visual detection module is started; the visual detection module collects image data and Z-axis space depth information of the printing head and the printing platform. Through fusion application of AI deep learning and the multi-sensing technology, the calibration precision and stability of the multi-tool-head three-dimensional printer are remarkably improved, the system combines dual data support of the visual detection module and the pressure detection module, time sequence fusion and weighted analysis are carried out through the AI fusion control module, and the calibration precision and stability of the multi-tool-head three-dimensional printer are improved. The X-axis offset, the Y-axis offset, the Z-axis offset and the attitude deflection angle are accurately calculated, the problem of printing layer dislocation caused by printing head assembly deviation is effectively solved, the consistency of multi-material printing and multi-process connection is ensured, and the calibration precision is greatly improved compared with a traditional manual calibration method.

A selective heating system for heating a layer of print material on a print bed of a selective laser sintering printer includes a computing module, a light source, and a lens. The calculation module stores a print pattern for printing a three-dimensional object. The light source emits light corresponding to a printed pattern. The lens focuses light corresponding to a print pattern onto a print material on a print bed.

This relates to a method and system for three-dimensional printing on fabric. [Solution] The three-dimensional printing system comprises a nozzle array for dispensing construction material, a work tray (12 / 360), and a jig (402) configured to attach a fabric (420) to the work tray. A computerized controller operates at least the nozzle array to dispensing construction material onto the attached fabric in a construction pattern corresponding to the shape of the object.

The invention discloses a 3D printer with a printing space located in a drying oven cavity, and belongs to the technical field of 3D printing. According to the 3D printer, a printing device is installed on a horizontal driving device, a printing platform is installed on a vertical driving device, a printing space is formed in a drying oven, the printing platform is arranged in the printing space, the drying oven is used for adjusting the environment temperature in the printing space, and a horizontal organ cover and a feeding module are installed on the horizontal driving device. The horizontal organ cover is arranged between the printing space and the horizontal driving device, the feeding module is arranged above the organ cover, the vertical organ cover is installed on the vertical driving device, and the vertical organ cover is arranged between the printing space and the vertical driving device. The printing space of the 3D printer can be arranged in the drying oven cavity, so that the environment temperature of the printing space is adjustable, and the key requirements of the current high-performance engineering plastic 3D printing problem are met.

This invention provides a three-dimensional molding apparatus and method that improve molding accuracy in three-dimensional molding, which involves repeatedly melting and solidifying powder and then cutting it to form a three-dimensional object. [Solution] In a powder bed type three-dimensional molding apparatus, a laser is irradiated onto metal powder to melt and solidify the powder, forming thin layers, and these thin layers are stacked to create a three-dimensional object. At this time, the molding accuracy of the object is improved by cutting off the formed layers after each predetermined layer has been formed, such as 10 layers. The cutting data that defines the cutting shape uses a shape S3 obtained by reflecting the displacement d1 between the desired shape S1 and the shape S2 whose deformation has been predicted by simulation onto shape S1. Alternatively, the deformation of shape S3 may be further predicted to obtain a displacement d2 between it and shape S1, and a shape S5 that reflects this displacement may be used as the cutting data.

A method for manufacturing a graphene-incorporated UHMWPE structure, the method comprising the step of i. providing a build chamber having a vertically movable platform defining a build plate, on which SLS In a 3D printing process, powder material may be sintered layer by layer, and the method further includes: ii. preheating a build chamber; iii. reducing the pressure in the build chamber and / or supplying an inert gas into the build chamber; iv. depositing a UHMWPE powder layer on a build plate to define a print bed; v. exposing a selected area of ​​the UHMWPE powder layer to at least one first laser light source to create a sintered region of the UHMWPE powder layer; vi. exposing a selected area of ​​the UHMWPE powder sintered region to at least one second laser light source to induce graphene formation derived from the UHMWPE powder; vii. lowering the platform by one step corresponding to the thickness of the UHMWPE powder layer and depositing a further UHMWPE powder layer thereon; and viii. repeating steps (v) to (vii) until the structure is complete.

A nozzle module and a three-dimensional printer are provided. The nozzle module includes a heat dissipation assembly, a locking assembly, and a nozzle assembly. The rotary member can rotate relative to the clamping ring, and a width of the opening is selectively reduced or increased when the rotary member rotates relative to the clamping ring, thereby enabling the clamping ring to clamp or release the nozzle assembly. Quick assembly and quick disassembly can be achieved, the assembly and the disassembly are convenient, and the assembly efficiency and the disassembly efficiency are improved.

A method of operating an apparatus for the layerwise manufacture of 3D objects. The method includes two or more operational cycles of a warm up phase, starting from ambient, followed by a build phase and a cooling phase. The warm up phase and the build phase each include a layer cycle of: (a) dosing build material to the work surface; (b) distributing a portion of the dosed amount over a build area; (c) heating the dosed amount; and (d) monitoring a temperature of the build material to determine a thermal state. The build phase includes melting layer-specific regions. These steps are repeated until the warm up and build phases are completed. A property of the subsequent warm up phases is determined such that the duration of a subsequent warm up phase is shorter than the duration of a preceding warm up phase.

The present disclosure provides systems and methods for the formation of three-dimensional objects. A method for forming a three-dimensional object may comprise alternately and sequentially applying a stream comprising a binding substance to an area of a layer of powder material in a powder bed, and generating at least one perimeter of the three-dimensional object in the area. The stream may be applied in accordance with a model design of the three-dimensional object. The at least one perimeter may generated in accordance with the model design.

The utility model relates to the technical field of 3D printers, discloses a hot melting assembly and a 3D printer, and aims to improve the printing speed and the printing quality of the 3D printer. The hot melting assembly comprises a spray head piece, a runner body and a throat pipe piece which are connected in sequence, and at least a hot melting runner is arranged in the runner body and used for heating hot melting consumables. Wherein the length dimension of the hot melting runner is 40 to 200mm. The heated contact area of the hot melting consumable is increased through the lengthened hot melting runner, the heated melting speed of the hot melting consumable in unit length can be increased, the quality of printed and stacked preset parts can be improved, and a good printing effect is achieved.