36results about "Manufacturing recycling" patented technology

The invention relates to a process for recycling a particulate semi-crystalline polyamide, the initial particulate semi-crystalline polyamide having already been used in a layer-by-layer printing process, the process comprising: - a step of contacting the initial particulate semi-crystalline polyamide with water and at least one acid; - a step of heating the initial particulate semi-crystalline polyamide to a temperature above Tc – 20°C and below Tf, Tc denoting the crystallization temperature of the initial particulate semi-crystalline polyamide and Tf being the melting temperature of the initial particulate semi-crystalline polyamide, and - a step of collecting the treated particulate semi-crystalline polyamide, in which the treated particulate semi-crystalline polyamide has an inherent viscosity lower than the inherent viscosity of the initial particulate semi-crystalline polyamide.

This disclosure describes multi-fluid kits for three-dimensional printing, three-dimensional printing kits, and methods of testing powder bed material for contamination. In one example, a multi-fluid kit for three-dimensional printing can include a fusing agent and a detector solution. The fusing agent can include water, an electromagnetic radiation absorber, and a first pigment reactant. The electromagnetic radiation absorber can absorb radiation energy and convert the radiation energy to heat. The detector solution can include water and a second pigment reactant. The second pigment reactant can be reactive with the first pigment reactant to form a colored pigment.

The application discloses a 3D printer with a rapid printing function and belongs to the field of 3D printing. The 3D printer with the rapid printing function comprises a printing table and a fixed bin, the fixed bin is internally provided with a moving shaft one capable of moving in a vertical direction, the side surface of the moving shaft one is provided with a moving shaft two capable of moving in a horizontal direction, the side surface of the moving shaft two is provided with a nozzle placing table capable of moving in the horizontal direction, and the top of the nozzle placing table is provided with a conveying hose. The 3D printer with the rapid printing function is characterized in that the palm of an operator holds a rotating cylinder, the rotating cylinder is then rotated, the rotating cylinder is then loosened, and the nozzle one and the nozzle two can be replaced by cooperating with a spring one, a pressing plate, an extruding rod, a fixed plate, a spring two, a stressed plate, a fixed rod, a limiting block, a gear one and a sealing ring, so that the printing efficiency of the device is improved when different profiles are printed.

The invention relates to a process for preparing an aged building material from a process for additively manufacturing a three-dimensional object, wherein the preparation process comprises: mixing i) an aged building material from a process for additively manufacturing a three-dimensional object, wherein: the process for additively manufacturing a three-dimensional object comprises providing a building material layer by layer and selectively solidifying the building material layer by layer by the action of electromagnetic radiation, emitted by a radiation source, at positions in each layer that correspond to the cross section of the object in this layer; and the non-solidified building material is detached and forms the aged building material, and ii) a fresh building material for additively manufacturing a three-dimensional object, wherein: a prepared building material for additively manufacturing a three-dimensional object is formed; the aged building material and the fresh building material each contain a polymer and at least the fresh building material contains an amorphous silicon dioxide; and the ratio based on percent by weight of aged building material to fresh building material is greater than 60:40.

In a method for cleaning components with adhering unreacted resin, especially components produced via a lithographic additive manufacturing process, a cleaning step is provided wherein the components are brought into a cleaning chamber (1), the components in the cleaning chamber (1) are contacted with a cleaning medium to detach resin from the components, and the cleaning medium laden with the detached resin is brought out of the cleaning chamber (1), and a regenerating step is provided wherein the laden cleaning medium is passed to a distillation unit (4) in which the contaminated cleaning medium is regenerated by distillative removal of the resin. The cleaning medium is admixed with at least one inhibitor, which prevents polymerization of the resin during the cleaning step and / or the regenerating step.

This invention discloses an industrial 3D printing waste collection box, comprising an outer shell, a pull-out opening on one side of the inner wall of the outer shell, a filter frame slidably fitted onto the inner wall of the pull-out opening, a filter screen fixedly connected to the lower side of the inner wall of the filter frame, and a dust filter port located on one side of the inner wall of the pull-out opening and below the pull-out opening. This invention, by setting the filter screen of the filter frame to trap large particles of recyclable waste, such as metal powder and plastic filaments, and the filter cloth of the dust collection box to intercept fine dust, achieves graded collection of waste. Materials with few impurities and particle sizes meeting recycling standards are separately trapped and can be reused in printing production without complex purification; while fine dust can be centrally stored for use in other low-precision processing scenarios or handed over to professional institutions for processing, avoiding the reduction in overall recycling value caused by mixing waste of different particle sizes. Combined with the negative pressure generated by the air pump, the dust moves faster towards the collection area, improving collection efficiency and thoroughness.

This utility model discloses a 3D printing resin recycling device, relating to the field of 3D printing technology. The device includes a horizontal plate, with a heating box fixedly connected to one side of the top of the horizontal plate. A crushing mechanism is connected to the top of the heating box. A conveying pump is fixedly connected to the top of the horizontal plate, and a filtering mechanism is fixedly connected to the other side of the top of the horizontal plate. The crushing mechanism includes a crushing box. This utility model utilizes two sets of rotating rollers and staggered crushing blades to achieve highly efficient crushing of waste materials, greatly improving crushing efficiency and quality. The ingeniously designed inclined magnetic suction plate not only precisely removes metal substances from the waste materials, preventing damage to the crushing components, but also gathers the waste materials towards the center, further optimizing the crushing effect and extending the service life of the crushed parts. This solves many problems in the crushing stage of traditional recycling devices, laying a good foundation for subsequent recycling processing.

A device for cleaning components manufactured using a lithographic additive manufacturing process comprises at least one cleaning chamber (1), at least one storage container (2, 5) for a cleaning medium that can be connected to the cleaning chamber (1), in particular at least two storage containers (2, 5) that can be connected to the cleaning chamber (1), and a distillation unit (4) whose inflow can be connected to the cleaning chamber (1) or the at least one storage container (2, 5) via a first line and whose outflow can be connected to the cleaning chamber (1) or the at least one storage container (2, 5) via a second line in order to supply resin-loaded cleaning medium from the cleaning chamber (1) or the storage container (2, 5) to the distillation unit (4) and simultaneously return regenerated cleaning medium from the distillation unit (4) to the cleaning chamber (1) or the storage container (2).

This application discloses a 3D printer, including a print head, a supporting assembly, a transmission assembly, and a pushing member. The supporting assembly comprises a material receiving area configured to receive excess material extruded from the print head. The transmission assembly is movably arranged on the supporting assembly. The pushing member rotatably is connected to the transmission assembly. A motion trajectory area of the pushing member covers at least a part of the material receiving area, and the transmission assembly is configured to drive the pushing member to rotate relative to the supporting assembly thereby pushing the excess material away from the supporting assembly.

A powder spreading device includes a device body, an adjustment assembly, and a dust removing mechanism. The adjustment assembly is provided on the device body. The adjustment assembly is configured to orient to a powder spreading surface. A first end of the dust removing mechanism is provided on the device body. The first end of the dust removing mechanism is covered over the adjustment assembly. A second end of the dust removing mechanism is communicated to the first end of the dust removing mechanism. The second end of the dust removing mechanism is configured to extend to the device body. A three-dimensional (3D) printing device and a 3D printing system are further provided.

The invention relates to a process for treating a particulate semi-crystalline polyamide comprising a step of contacting an initial polyamide with water and at least one acid to obtain a mixture; at least one step of heating the mixture to a temperature between Tc - 20°C and Tc + 20°C, Tc representing the crystallization temperature of the initial polyamide; at least one step of separating the mixture by a solid-liquid separation means, to obtain a solid fraction with a moisture content of less than 25% by weight, and a step of drying the solid fraction, leading to the recovery of dried treated particulate semi-crystalline polyamide.

To appropriately realize a configuration suitable for a molding apparatus that forms colored objects.SOLUTION: A molding apparatus 10 for forming at least partially colored formed objects 50, comprises a plurality of head units and a carriage 202, each head unit has a plurality of nozzle rows each ejecting ink supplied from an ink container via mutually different ink supply paths, the carriage 202 holds, as the multiple head units, a first head unit being a head unit 204a, having a plurality of nozzle rows each ejecting colored ink of a different color from one another, and a second head unit being a head unit 204b, having a plurality of nozzle rows each ejecting ink different from the colored ink ejected by the head unit 204a.SELECTED DRAWING: Figure 1

The invention relates in particular to a production system (S) for additively manufacturing at least one component (1), wherein the production system (S) comprises at least one extrusion apparatus (2) with which component material for manufacturing the at least one component (1) can be applied in a production area (9) in component layers (1S) that follow one another along at least one build-up direction (z). A production system (S) according to the invention comprises, in addition to the at least one extrusion apparatus (2), at least one dispensing apparatus (5) with which, after at least one component layer (1S) has been applied, a free space (91.1, 91.2, 91.3, 91.4) present in the production area (9) and without component material can be at least partially filled with at least one support material.

This patent application relates to a 3D printing process by powder sintering, comprising a shearing step of the unsintered powder to enable its recycling. It also relates to the use of a mixer equipped with an agitator comprising at least one blade rotating at a speed of at least 100 rpm and / or at a blade tip speed of at least 10 m / s, at a temperature below 50°C, to improve the recyclability of a powder composition comprising at least one thermoplastic elastomer in a 3D printing process by sintering.

The invention relates to additive manufacturing systems and methods. Additive manufacturing systems including two-dimensional energy patterning systems for imaging a powder bed are disclosed. Improved optical systems are described that support beam combining, beam steering, and patterning and unpatterning beam recycling and reuse.

Provided in the present disclosure are a system and method for three-dimensional printing. The system comprises a post-processing apparatus. The post-processing apparatus comprises: an object receiving mechanism, comprising an object receiving body, the object receiving body is configured to carry a 3D printed object with residual printing materials; and a driving mechanism, configured to allow the object receiving mechanism to rotate from a first state to a second state such that the residual printing materials drip from the 3D printed object, wherein the 3D printed object has at least two different tilt angles. The technical solutions of the present disclosure effectively solve the problems of a poor separation effect of separating the residual printing materials from the 3D printed object and low efficiency in the related art.

The utility model provides a kind of waste collection device after 3D printing multicolor material switching, it is related to 3D printing field, comprising: compartment component, the compartment component is composed of driving mechanism and compartment mechanism, compartment component can carry out compartment processing inside cover assembly, to realize the temporary storage material of different colors in different lattice, driving mechanism can drive compartment mechanism rotation switching blanking lattice, realize the function of classified storage, and compartment component can be used to divide the inside of cover assembly into at most six same-volume lattice, can set the lattice required by demand, can adapt to the use demand of different waste collection, maximize the volume of single temporary storage waste, solve the problem that the number of lattice inside existing waste collection box is fixed and cannot be adjusted, need to purchase multiple specifications to adapt to different needs of printing use when selecting and purchasing, poor adaptability.

The application discloses a kind of fiber composite material stripping recycling device and control method in the field of composite material additive technology, the device includes workbench mechanism, winding mechanism and transfer mechanism.Workbench is fixed by heating adhesion to recover slice, reduce warping;Winding mechanism integrates vision module, horn mouth guide and winding module;Transfer mechanism drives winding mechanism to move as a whole, so that the fiber span from stripping point to winding point is constant, reduce tension fluctuation and risk of broken wire.Control method uses segmented heating, pre-tightening force application and speed synchronization strategy, and supports known path reverse analysis, unknown path vision planning and offset feedback dynamic adjustment when fiber is not clear.The application is suitable for complex scenes such as loop, sharp turn and unknown printing path, and can improve recycling length and efficiency.

The present invention reduces the burden of and increases the efficiency of the work of collecting a powder material from a shaping tank into a supply tank. A three-dimensional shaping apparatus 100 includes: a shaping tank 20 for shaping a three-dimensional shaped object 92; a shaping table 24; a supply tank 30 for supplying a powder material 90; and a first partition 80 that is provided on the shaping tank 20 and that extends upward relative to an upper position of the shaping table 24. As the shaping table 24 is raised after completion of the shaping of the three-dimensional shaped object 92, the powder material 90 is raised to a relatively high position while being prevented from spilling by the first partition 80. The operator can easily return the powder material 90 to the supply tank 30 by pushing the powder material 90 to one side in the horizontal direction. This eliminates the need for the work of lifting a scoop or the like from inside the shaping tank 20.

The present application provides a kind of layered modeling device and the manufacturing method of three-dimensional modeling object, which can realize the unmanned of the extraction of modeling object by more appropriately removing the remaining material on modeling workbench.In the layered modeling device of the present application, the modeling workbench is configured to be able to move up and down by a workbench driving mechanism, the material layer forming device is configured to supply material powder to the bottom plate placed on the modeling area to form a material layer, the chuck device is configured to be able to freely attach and detach the bottom plate and be fixed in the modeling area, the material recycling device includes a suction nozzle capable of suctioning the remaining material on the modeling workbench, the moving device is configured to be able to move the suction nozzle, the robot is configured to be able to take out the bottom plate and the modeling object from the chamber, and the control device alternately and repeatedly controls the workbench driving mechanism to make the modeling workbench rise by a specified rising amount and simultaneously moves the suction nozzle to suction the remaining material powder.

This utility model relates to a 3D printing device suitable for large-size printed parts, belonging to the technical field of 3D printing equipment. It includes a support frame, a printing assembly, a track, and a forming platform. The printing assembly includes a bracket and a sand-laying device and an inkjet printing device mounted on the bracket. The support frame has a built-in lifting drive mechanism, whose drive end is connected to the bracket to drive the bracket to move up and down. The track is located below the printing assembly. The forming platform is movably mounted on the track. This utility model replaces the previous gradually descending forming cylinder technology with a technology that controls the printing assembly to rise gradually through a lifting drive mechanism. During the printing process, the forming platform is only responsible for bearing the continuously increasing weight of the material layer. Therefore, the lifting drive mechanism does not experience the situation of continuously increasing force as the printing process progresses, as in traditional technologies. This allows for more precise control of the printing thickness and accuracy. Furthermore, unlike the high requirements of forming cylinder structure manufacturing, it effectively saves manufacturing costs.

A build material supply system is provided for an apparatus for manufacturing 3D objects from build material layers, comprising a dispensing device for supplying dispensing amounts of build material to a work surface, the dispensing amounts including layer quantity and excess quantity; a buffer tank for mixing the build material; an excess quantity return chamber for receiving excess build material; a supply tank for fresh build material; a build material pump; and a controller; wherein the inlet of the build material pump is connected to the supply tank via a first valve, and in a first embodiment: the inlet of the build material pump is connected to the excess quantity return chamber via a second valve and to the buffer tank via a third valve; the outlet of the pump is connected to the buffer tank via a fourth valve and to the inlet of the dispensing device via a fifth valve; wherein the controller is connected to the pump and the valves and is configured to: (i) control the first valve, the second valve, and the fourth valve to close, control the third valve and the fifth valve to open, and control the pump to operate so as to allow build material to be dispensed. (ii) Controlling the third and fifth valves to close, controlling the first and fourth valves to open, and controlling the pump to operate, so as to allow fresh build material to flow from the supply tank into the buffer tank; and (iii) Controlling the third and fifth valves to close, controlling the second and fourth valves to open, and controlling the pump to operate, so as to allow excess build material to flow from the excess return chamber into the buffer tank; and in a second embodiment: the inlet of the build material pump is connected to the outlet of the excess return chamber; the outlet of the pump is connected to the inlet of the buffer tank; and the outlet of the buffer tank is connected to the inlet of the dispensing device; wherein the controller is connected to the pump and the first valve and is configured to control the first valve to open and control the pump to operate, so as to allow fresh build material to flow from the supply tank into the buffer tank and allow excess build material to flow from the excess return chamber into the buffer tank. A method for delivering build material through a build material system is also provided.

ADDITIVE MANUFACTURING PROCESS, POLYMER POWDER COMPOSITION COMPRISING A DETECTION ADDITIVE AND OBJECT OBTAINED BY SAID PROCESS A manufacturing process for a three-dimensional object, comprising a localized temperature increase of a powder by electromagnetic radiation in a heated chamber, causing the localized melting / coalescence of a layer of predetermined thickness to form, after cooling, a solid layer of polyamide, said process being characterized in that said powder comprises, by weight of the total composition: - between 60% and 99% by weight of polyamide - between 1% and 40% by weight of an optical and / or magnetic detection additive selected from the group formed by: pigments comprising a spinel structure which contains a cation of a transition metal, oxides of a transition metal,the sulfides of a transition metal - between 0% and 5% by weight of a flow agent and in that the powder has: - a D50 between 35 µm and 55 µm, - a D10 less than 20 µm and - a D90 greater than 80 µm. Figure for the abbreviation: Figure 5,

The present invention provides a polyamide powder that is easy to use, can be recycled several times without requiring modification of the sintering apparatus operating conditions, and enables the acquisition of objects with reproducible mechanical properties. [Solution] A polyamide powder intended for use in a powder aggregation method by melting, comprising at least one chain limiting agent, wherein the chain limiting agent is in an amount of 0.01% to 10% by weight, preferably 0.01% to 5% by weight, preferably 0.01% to 4% by weight, preferably 0.01% to 3% by weight, preferably 0.01% to 2% by weight, preferably 0.01% to 1% by weight, based on the total weight of the polyamide powder, and the chain limiting agent is selected from the group consisting of dicarboxylic acids, monocarboxylic acids, diamines, and monoamines.