34results about How to "Avoid print failures" patented technology

The invention relates to picture color tone control for a printing press, and it is an object of the invention to make it possible to confirm a color shade before printing is performed thereby to prevent failure in printing and suppress incidence of paper loss. A device profile of a printing press to be used for printing is acquired, and a device profile of a simulation printing tool is acquired and plate making data is acquired. Then, the device profile of the printing press is used to convert tone value data k, c, m, y of the plate making data into color coordinates (L*a*b*), and color coordinates (L*a*b*) obtained by conversion using the device profile of the simulation printing too are outputted with densities according to densities R, G, B from the simulation printing tool. Then, it is decided whether or not the color shade of the output is within a permissible range. Plate making and picture color tone control of the printing press are performed based on a result of the decision.

The present invention provides a method for producing a reversible thermosensitive recording medium, the method including: conveying an inlet sheet which includes inlets each having a convex-shaped electronic information recording element, retrieving positional information of the inlets, cutting the inlet sheet into individual inlets, retrieving positional information of the convex-shaped electronic information recording element in the individual inlets, conveying a base sheet, which includes concave portions, toward the vacuum suction roller, retrieving positional information of the concave portions, aligning the convex-shaped electronic information recording element with the concave portions so as to be inserted into the concave portion, and laminating the inlets and the base sheet.

The invention discloses a three-dimensional printing method based on fluid support. The printing method comprises the following steps that (1) a supporting fluid material is prepared, and then is putinto a container; (2) a three-dimensional model to be printed is sliced, and then a printer is used for printing a structure in the supporting fluid material in the step (1); (3) the structure which is printed in the step (2) is enabled to undergo post-curing in the supporting fluid material; and (4) after curing is completed, the printed structure is taken out by using a colander. According to the printing method, a supporting structure does not need to be designed and machined additionally, therefore, the structure range suitable for printing processing can be expanded, the printing yield isincreased, the post-processing process is simplified, and the printing cost is reduced.

The invention mainly provides four methods for setting multiple sets of slice printing parameters of photocuring 3D printing models. In the method 1, a user can print a batch of dozens of same models and can set different accurate and dense stepped parameters respectively. In the method 2, a user can set different model slice printing parameters for a plurality of same models in each set in groups while printing a batch of multiple sets of different models. In the method 3, a user can divide the 3D model into different areas according to the height, and when a batch of one or more same models are printed, the 3D model can be divided into different areas according to the height, and model slice printing parameters are independently set. In the method 4, the user divides the 3D model into different slice parameter setting ranges on the XY plane with different preset cross section areas as comparison standards, and when one or more models are printed in a batch, the models can be divided into the different slice parameter setting ranges according to the different preset cross section areas, and model slice printing parameters are independently set.

The invention provides a printing forming chamber with a local temperature control function. The printing forming chamber comprises an outer shell, a forming platform arranged in the outer shell and aprinting spray head arranged above the forming platform, wherein a hot air circulation air duct which enables the forming platform to blow out upward airflow capable of wrapping a printing model on the top face of the forming platform towards the position above the top face of the forming platform is further arranged in the outer shell; the printing spray head comprises a throat pipe, a nozzle, aspray head heating module and a spray head heat dissipation module, wherein one end of the throat pipe penetrates the hot air circulation air duct from the outer portion of the outer shell to stretchto the position above the forming platform, the nozzle is connected to the end, close to the forming platform, of the throat pipe, and the spray head heating module and the spray head heat dissipation module are arranged on the throat pipe in a penetrating manner and located on the inner side and the outer side of the hot air circulation air duct correspondingly; and the spray head heating moduleis located in the hot air circulation air duct, and the spray head heat dissipation module is located on the outer side of the outer shell. The invention further provides a 3D printer with the printing forming chamber. By means of the printing forming chamber with the local temperature control function and the 3D printer with the printing forming chamber, a high-temperature environment meeting the requirement for printing materials can be provided for the whole printing process.

The screen printing mask is used for printing paste simultaneously on circuit boards held by the carrier. The mask has a flat mask plate. On the lower surface of the mask plate, a flat-bottomed recess capable to accommodating at least one of the circuit boards is formed so as to correspond to the array of the circuit boards on the carrier. A pattern hole is formed only in the recess.

The invention discloses a lightweight active support structure of a suspended circular-section flow passage. The structure comprises a convoluted rhombic active support structure and a stretching poreplate active support structure, the suspended circular-section flow passage is supported on the convoluted rhombic active support structure, and the stretching pore plate active support structure isfixed under the convoluted rhombic active support structure; the stretching pore plate active supporting structure is connected to an installation surface obtained by additive manufacturing, and the forming direction of the suspended circular-section flow passage is perpendicular to the installation surface; and the suspended circular-section flow passage is manufactured and formed by an SLM rapidprototyping technique. The lightweight active support structure realizes one-time forming of the suspended circular-section flow passage in an SLM manufacturing process without post-processing to remove a support, and simultaneously increases the strength and stability of connection of all parts.

The invention discloses a method for preparing aluminum oxide ceramic based on sinking type DLP photocuring 3D printing, and the method comprises the following steps of: mixing and stirring aluminum oxide powder, a first dispersing agent and an organic solvent, conducting drying, crushing and sieving to obtain modified aluminum oxide powder, adding graphene, a second dispersing agent and a defoaming agent into acrylic photosensitive resin, performing mixing, then adding modified aluminum oxide powder, carrying out ball milling and defoaming treatment to obtain aluminum oxide ceramic paste, carrying out photocuring 3D printing by adopting a sunken DLP photocuring method, and then carrying out sectional process degreasing treatment and sintering to obtain the aluminum oxide ceramic. The method disclosed by the invention is suitable for preparation and industrial production of the large-size aluminum oxide ceramic piece with low deformation, high precision and complex structure, and the prepared aluminum oxide ceramic has the advantages of few microdefects, high density, good mechanical and physical properties and the like.

The invention relates to the technical field of artificial intelligence, and can be applied to the field of smart government affairs, thereby promoting the construction of smart cities. The inventionprovides a seal printing method and device, electronic equipment and a storage medium, and the method comprises the steps: receiving a seal printing instruction which carries a to-be-printed file; ifthe file format of the to-be-printed file is inconsistent with a preset file format, performing format conversion on the to-be-printed file to obtain a target file; if the file size of the target fileis greater than a preset file size threshold, performing double-page cutting on the target file to obtain a plurality of cut files; and if the file sizes of the plurality of cut files are all smallerthan or equal to the preset file size threshold, performing seal printing on the plurality of cut files to obtain a seal file. The seal printing efficiency can be improved. In addition, the inventionfurther relates to a blockchain technology, and the seal file can be stored in a blockchain.

The invention discloses a step mechanism for a fused deposition type 3D printer. The step mechanism comprises a horizontal module, a first perpendicular module, a second perpendicular module, a first width module and a second width module, wherein a horizontal guide rail, a first guide rail and a second guide rail are arranged on the horizontal module, the first perpendicular module and the second perpendicular module respectively, the first guide rail and the second guide rail are arranged in the vertical direction; a printing spray head is arranged on the horizontal guide rail; an angle regulating connecting plate with a cavity structure is arranged on the first guide rail; a rotary connecting plate with a through hole is arranged on the second guide rail; a shaft perpendicular to the first guide rail is further arranged on the first guide rail; a rotary shaft perpendicular to the second guide rail is further arranged on the second guide rail; the shaft penetrates through the cavity structure and then is connected with one end of the horizontal module; the rotary shaft penetrates through the through hole and then is connected with the other end of the horizontal module; a first control module, a second control module, a third control module and a fourth control module are arranged on the first perpendicular module, the second perpendicular module, the first width module and the second width module respectively.

The invention relates to the technical field of 3D printing, and discloses a photocuring 3D printer and a printing method thereof.The photocuring 3D printer comprises a stock bin, a light source assembly, a camera shooting mechanism, a controller and an alarm; the stock bin is provided with an accommodating cavity for accommodating a liquid photosensitive material; the light source assembly is arranged on the edge of the opening of the containing cavity and used for forming a preset light spot on the liquid level of the photosensitive material, and the area of the preset light spot is reduced along with descending of the liquid level of the photosensitive material; the camera shooting mechanism is arranged on the stock bin and used for collecting an in-cavity image of the photosensitive material in the containing cavity; the controller is used for receiving the intracavity image and calculating the area of a preset light spot in the intracavity image; the alarm is used for giving out a material shortage alarm when the preset light spot area is smaller than or equal to a preset value. The remaining amount of the photosensitive material in the stock bin is automatically monitored, the labor cost is reduced, and meanwhile printing failure caused by insufficient liquid photosensitive material is avoided.

A printer includes a transporting block, a printing block, a positioning block, and an intermediate picking-up device. The positioning block is disposed between the transporting block and the printing block, and positions printing sheets transported by the transporting block at a predetermined location one at a time, so that they are positioned one at a time at a printing location of the printing block where printing is performed on the printing sheets. The intermediate picking-up means picks up the printing sheets positioned at the predetermined location in the positioning block one at a time in order to transport the printing sheets to the printing block.

The invention discloses a fluid material conveying device for 3D printing machine. The fluid material conveying device comprises a discharging pipe, a connection pipe, a feeding pipe, a pneumatic pipe, a mounting plate and a bottom plate. The discharging pipe, the connection pipe and the feeding pipe are all mounted on the mounting plate through fixing parts, the mounting plate is arranged on the bottom plate, a discharging tank and a feeding tank are arranged on two sides of the bottom plate respectively, and a liquid level sensor is arranged on one side of the discharging tank. The fluid material conveying device for the 3D printing machine has advantages that by constant changing of electromagnet poles, a cylindrical magnet drives a piston to continuously move up and down so as to change internal air pressure of the pneumatic pipe, then fluid materials in the feeding tank are conveyed into the discharging tank, a user can precisely control feeding speed only by changing exchange frequency of the electromagnet poles, liquid level change of the fluid materials in the discharging tank can be sensed by the liquid level sensor on the side wall of the discharging tank, and accordingly precision in feeding quantity control is realized.