23 results about "Volumetric printing" patented technology

The present invention includes methods for reducing photoexcitation of a photoswitchable photoinitiator in volumetric printing including a volume of a photohardenable composition at locations in the volume at which intersection of two wavelengths does not occur; methods of three-dimensional (3D) printing including dual-wavelength photoexcitation of a photohardenable composition included in a volume, the method including photoexcitation by a modified or controllably-sized light sheet including a first wavelength and an optical projection including a second wavelength; and methods for extending the reuse-printing lifetime of a photohardenable composition including a photoswitchable photoinitiator. Preferably the photohardenable composition includes the dual-wavelength photoinitiator and a photohardenable resin component. The present invention also includes a photohardenable composition including a photoswitchable photoinitiator with an improved reuse-printing lifetime.

An example of a fusing agent includes cesium tungsten oxide nanoparticles present in an amount ranging from about 0.01 wt% active to about 1 wt% active, based on a total weight of the fusing agent, and a liquid vehicle. The liquid vehicle includes water and a co-solvent mixture including from about 0.1 wt% active to about 10 wt% active of benzyl alcohol and from about 10 wt% active to about 40 wt% active of a co-solvent to improve miscibility between the benzyl alcohol and the water, where the wt% active of the benzyl alcohol of the co-solvent are each based on the total weight of the liquid vehicle.

A liquid photohardenable composition for volumetric printing including a photohardenable resin component, a dual-wavelength photoinitiator, and a thixotrope,, wherein the liquid photohardenable composition exhibits non-Newtonian rheological behavior and a light transmittance greater than 90% for a 5 centimeter (cm) pathlength. Preferably such transmissivity remains above 90% for at least 10 days after preparation. Preferably the liquid photohardenable composition exhibiting non-Newton rheological behavior has a yield stress greater than or equal to about 5 Pascals at 50 degrees Celsius, Methods of forming an object in a volume of a liquid photohardenable composition of the invention and a method for screening thixotropes for inclusion in a liquid photohardenable composition are also disclosed.

Stereographic printing 3 on a porous substrate 4 penetrates 7 through it and onto an underlying bonding substrate 6. Preferably the substrates 4, 6 are flexible, the bonding substrate 6 is more wettable than the porous substrate 4, and the porous substrate 4 has higher degree of capillarity than the bonding substrate 6. The substrates 6, 4 are preferably placed on a last 2 and the three-dimensional printed features 8 are overprinted with another 3D print layer. The wearable article produced is a glove.

The present invention relates to a process for volumetric printing of a shaped body comprising locally polymerizing a starting material comprising a bio-co-initiator.

A method for volumetric printing a three-dimensional object by multi-color photopolymerization of a photocurable resin.

The utility model relates to the technical field of three-dimensional printing, in particular to a polarized light three-dimensional anti-counterfeit printing device which comprises a first supporting frame, a conveying assembly, a second supporting frame, an ink storage box, a sealing cover, an ink conveying pipe, a water pump, a first air cylinder and a printing plate. The second supporting frame is fixedly connected with an ink storage box, the ink storage box is covered with a sealing cover, two first air cylinders are installed in the second supporting frame, a printing plate is installed between telescopic rods of the two first air cylinders, and an ink conveying pipe is connected between the printing plate and the ink storage box. A motor is started, a printed matter is placed on a conveying assembly, an output shaft of the motor rotates to drive a clamping rod, a shaft rod and a dust-sticking roller to rotate, the conveying assembly drives the printed matter to move backwards, dust and impurities on the surface of the printed matter are removed while the dust-sticking roller rotates, and particles are prevented from being pressed into printing ink or materials in the printing process; therefore, printing defects are reduced.

A liquid photohardenable composition for volumetric printing including a photohardenable resin component, a dual-wavelength photoinitiator, and a thixotrope,, wherein the liquid photohardenable composition exhibits non-Newtonian rheological behavior and a light transmittance greater than 90% for a 5 centimeter (cm) pathlength. Preferably such transmissivity remains above 90% for at least 10 days after preparation. Preferably the liquid photohardenable composition exhibiting non-Newton rheological behavior has a yield stress greater than or equal to about 5 Pascals at 50 degrees Celsius, Methods of forming an object in a volume of a liquid photohardenable composition of the invention and a method for screening thixotropes for inclusion in a liquid photohardenable composition are also disclosed.

The utility model relates to the technical field of heat transfer printing, and discloses a three-dimensional printing heat transfer printing machine which comprises a workbench, a support is fixedly connected to the upper surface of the workbench, a hydraulic rod is fixedly connected to the interior of the support, and a mounting assembly is arranged at the output end of the hydraulic rod. A guide plate is fixedly connected to the upper surface of the workbench, a first connecting frame is fixedly connected to one side of the outer wall of the guide plate, a transmission assembly is arranged at one end of the first connecting frame, the mounting assembly comprises a connecting seat, one end of the connecting seat is fixedly connected to the output end of a hydraulic rod, and a first spring is arranged in the connecting seat. A connecting block is slidably connected to the inner wall of the connecting base, and a second spring is arranged in the connecting block. According to the heat transfer printing head, the connecting block is inserted into the connecting base, so that the steel ball is shrunk, when the steel ball moves to the sliding groove, the steel ball is clamped into the sliding groove, the connecting block and the connecting base are rapidly connected in the mode, and then the heat transfer printing head is rapidly installed.

The present invention relates to volumetric additive manufacturing (3D printing) through holograms for manufacturing high performance components with high mechanical properties at low cost and with low environmental impact from a wide variety of different materials, including but not limited to metallic materials, ceramic materials, polymeric materials and / or combinations thereof. The invention further relates to the apparatus used, and to the printed components.

The invention relates to spiropyrans and a method of making the same. In particular, the present invention provides a method of exchanging the indole and salicylaldehyde moieties of spiropyrans in a reversible reaction. The method is used for synthesizing two-color photoinitiators with specific substituents and substitution patterns, which improves two-color volume printing (two-color volume printing). In addition, the invention also discloses a method for locally polymerizing a starting material through two-color photopolymerization.

The present invention includes methods for forming an object in a volume of a photohardenable composition included in a container including directing a light sheet and an optical image through a selected region of a surface of the container to a first position in the volume to initiate hardening of the composition as a result of exposure to the light sheet and optical image, wherein at least one of the light sheet or the optical image pass through an optical alignment element before passing into the container. Systems and printhead modules are also disclosed.

The utility model discloses an intermittent three-dimensional printing textile which comprises base cloth and a three-dimensional printing structure located on the base cloth, and the three-dimensional printing structure is a multi-layer three-dimensional printing layer formed by digital ink jet interval printing and stacking. The three-dimensional printing structure with the multiple three-dimensional printing layers is formed through multiple times of digital ink jet and interval printing and stacking, so that the three-dimensional height of the three-dimensional printing structure is more prominent, structures between the three-dimensional printing layers are more tightly attached, the shape and color of the three-dimensional printing structure are richer, and the three-dimensional printing structure is more attractive in appearance. And the texture on the three-dimensional printing structure is finer and smoother.

A method for volumetric printing a dental component by photopolymerization of a photocurable resin.

A method of fabricating at least one three-dimensional object by volumetric printing is disclosed.

An athletic shoe with a dynamic upper, the structure of which comprises a sole, the upper end of which is provided with an upper, and a dynamic three-dimensional pattern area combining active three-dimensionality with a plane, the outer wall of the pattern piece having a three-dimensional printing layer that, under normal conditions, can show different patterns when viewed from different angles, achieving a first dynamic effect; when walking, by operating the control panel, two micro electric take-up devices are controlled to work alternately; when one micro electric take-up device is working, the pull wire is wound in and drives the action ball to slide in the sliding groove, because the size of the action ball is larger than the size of the sliding groove, the sliding groove undulates, and under the positioning cooperation of the deformation belt, the entire pattern piece undulates, achieving a second dynamic effect; an outsider can view it from more angles, and when the other micro electric take-up device is working, the action ball is pulled back to the original position, achieving a cyclical reciprocating effect.

The utility model relates to the field of letterpress printing, and discloses packaging box letterpress anti-fake three-dimensional printing equipment which comprises a fixed base, a power assembly is fixedly connected to the top end of the fixed base and used for providing linear power, a connecting rod is fixedly connected to the bottom end of the power assembly, a printing frame is fixedly connected to the bottom end of the connecting rod, and the printing frame is fixedly connected to the bottom end of the printing frame. A connecting frame is fixedly connected to the top end of the fixed base, a fillet sliding rail is fixedly connected to the inner side of the connecting frame, a sliding rod is slidably connected to the interior of the fillet sliding rail, a rubber roller is fixedly connected to the periphery of the sliding rod, and a rotating connecting rod is rotatably connected to the periphery of the sliding rod. According to the letterpress printing device, by arranging the connecting shaft, the rotating connecting rod, the fillet sliding rail and other structures, after one-time letterpress printing is completed, the rotating connecting rod drives the rubber roller to move inwards, printing ink is smeared on the surface of a letterpress, manual operation or arrangement of an additional electric push rod is not needed, and the letterpress printing device is convenient to use, low in cost and suitable for being used by small and medium-sized enterprises.

The present invention includes a method for reducing optical excitation of a photo-convertible photoinitiator in volume printing comprising a volume of a photo-curable composition at a location where two wavelengths do not intersect in the volume; a three-dimensional (3D) printing method comprising dual wavelength optical excitation of a photohardenable composition included in a volume, the method comprising optical excitation by an adjusted or controllably sized light sheet comprising a first wavelength and an optical projection comprising a second wavelength; and a method of extending the reuse print life of a photo-curable composition including a photo-convertible photoinitiator. Preferably, the photocurable composition includes a dual wavelength photoinitiator and a photocurable resin component. The present invention also includes a photocurable composition comprising a photoconvertible photoinitiator having an improved reuse print life.

The utility model relates to the field of printing, in particular to a local three-dimensional image-text positioning printing assembly which comprises a base printing frame, electric sliding grooves are fixedly connected to the two sides of the base printing frame, electric sliding frames are arranged in the electric sliding grooves in a sleeved mode, and sliding sleeves are fixedly connected to the upper ends of the electric sliding frames. A transmission rack is sleeved with the sliding sleeve, a supporting frame is fixedly connected to the middle of the transmission rack, a rotating structure is arranged at the upper end of the supporting frame and comprises a motor frame, a transmission motor is fixedly connected into the motor frame, the output end of the transmission motor is fixedly connected with a transmission screw, and the outer side of the transmission screw is sleeved with a transmission sleeve in a threaded mode. The left side of the transmission sleeve is fixedly connected with a rotary limiting sleeve; the three-dimensional printing frame has the advantages that by arranging the rotating structure, when the three-dimensional printing frame is positioned, angle adjustment can be conducted at the same time, printing at different angles can be achieved during printing, and it is avoided that a printing mold needs to be replaced again.

The present invention includes methods for reducing photoexcitation of a photoswitchable photoinitiator in volumetric printing including a volume of a photohardenable composition at locations in the volume at which intersection of two wavelengths does not occur; methods of three-dimensional (3D) printing including dual-wavelength photoexcitation of a photohardenable composition included in a volume, the method including photoexcitation by a modified or controllably-sized light sheet including a first wavelength and an optical projection including a second wavelength; and methods for extending the reuse-printing lifetime of a photohardenable composition including a photoswitchable photoinitiator. Preferably the photohardenable composition includes the dual- wavelength photoinitiator and a photohardenable resin component. The present invention also includes a photohardenable composition including a photoswitchable photoinitiator with an improved reuse-printing lifetime.

A vortex energy-saving homogeneous sand blasting device in three-dimensional printing is characterized in that a screw conveyor (2) is coaxially arranged in a horizontally arranged storage tank (1), an air compressor (12) is arranged on a feeding pipe (11), and the feeding pipe (11) is connected with a spray gun (17) towards the inclined lower part; an outlet of a spray gun (17) is tightly attached to the upper front side opening edge of an operation notch (19) formed in the middle of a bottom plate (22) at the bottom, a collecting bin (21) is backwards communicated between the upper rear side opening edge of the operation notch (19) and a valve plug groove (20), and the upper end of a material return pipe (23) is connected back to the rear end of the material storage groove (1). A vortex tube (15) is installed on the lower side of the storage tank (1), and a valve plug body (18) is arranged between an operation notch (19) and a valve plug groove (20). Powder spraying, drying and finishing can be carried out on a sizing surface in printing at a low speed, and sand blasting on the surface of a printing plate roller can be carried out at a high speed. The device is suitable for various silt materials, can save and recycle the silt materials, is adjustable in airflow speed and temperature, and is energy-saving and environment-friendly.

The present invention includes methods, systems, and printhead modules for forming an object in a volume of a photohardenable composition included in a container including directing a light sheet and an optical image to intersect at a first position in the photohardenable composition to alter at least one property or cause an initial patterning of the photohardenable composition at the intersection and subsequently directing a second light sheet to intersect the first position at a later time to cause further alteration of the previously altered or initially patterned intersection of the photohardenable composition, and optionally repeating these steps one or more times until the object is partially or fully formed.