15results about How to "Reduce bubble defects" patented technology

The invention provides a ceramic tube extrusion molding machine. The ceramic tube extrusion molding machine comprises an automatic feeding device, a mixing and feeding device, an extrusion device, a vacuumizing device and a driving device, the automatic feeding device is connected with a feeding port of the mixing and feeding device and used for conveying pug into the mixing and feeding device. The mixing and feeding device comprises a pugging barrel and a double-helix structure which is arranged in the pugging barrel and meshed in different directions, and the double-helix structure is used for shearing and uniformly mixing pug and then conveying the pug to the extrusion device; the vacuumizing device is connected with the tail end of the material mixing and conveying device and is used for discharging gas mixed in the pug in the mixing and conveying processes; and the driving device is used for driving the mixing and feeding device and the extruding device to operate. The pug is effectively sheared and uniformly mixed through a double-helix structure which is meshed in different directions, so that the shearing and mixing uniformity of the pug is effectively enhanced, and the plasticizing quality of a green body is improved; and gas mixed in the pug is discharged through the vacuumizing device, the bubble defect in the ceramic tube is reduced, and the reliability of the ceramic tube is improved.

The utility model relates to the technical field of paint spraying, and discloses a paint spraying device convenient to adjust the spraying range, which comprises a stirring assembly and a spraying assembly, the stirring assembly is arranged above the spraying assembly, the stirring assembly comprises a fixing frame, the upper end of the fixing frame is connected with a stirring barrel, and the upper end of the fixing frame is connected with the spraying assembly. The upper end of the stirring barrel is connected with a feeding port, the upper end of the stirring barrel is connected with a stirring motor, the output end of the stirring motor is fixedly connected with a rotating shaft, one side of the rotating shaft is connected with a first stirring blade, one side of the first stirring blade is connected with a second stirring blade, and one side of the rotating shaft is connected with a connecting column. According to the spraying device, bubbles in paint can be discharged through the hole grooves, the bubble defect in the sprayed coating is reduced, the quality of the coating is improved, the risk that the stirring blades are damaged is reduced, the spraying coverage range can be enlarged, the time for adjusting the position of the device can be shortened, and the spraying efficiency is improved under the condition that the spraying device body is not moved. And therefore, the spraying efficiency is improved.

The application discloses a manufacturing method of a high-heat-dissipation-efficiency pouring type driving transformer, and belongs to the technical field of power electronic equipment manufacturing. The method aims to solve the technical problems of low heat dissipation efficiency and insufficient long-term reliability of the existing driving transformer caused by the limited heat conduction performance of the pouring material, the simple surface heat dissipation structure and the difficult coordination of internal thermal stress. The method comprises the following steps: constructing a three-dimensional digital model of a reinforced heat dissipation structure with a boss array and a groove array and preparing a corresponding forming die; positioning a magnetic core and a winding as an insert in a die cavity; pouring insulating colloid with different mechanical and heat conduction properties in batches in a vacuum environment; through a segmented curing process, the flexible colloid is fully filled in the internal gap and buffers the stress, and at the same time, the high-heat-conduction rigid colloid forms an external main body and a heat dissipation structure, thereby forming an integrated pouring body. The method is used for manufacturing the driving transformer suitable for high-power-density and high-heat-dissipation scenes, and can significantly improve the heat dissipation capacity and operation reliability of the driving transformer.

This invention provides a type of glass and its preparation method, belonging to the field of glass technology. The glass batch comprises the following raw materials in parts by weight: 679-713 parts silica sand, 4-40 parts feldspar, 39-59 parts wollastonite, 129-154 parts dolomite, 42-55 parts limestone, 224-231 parts soda ash, 8-10 parts sodium sulfate, and 0.3-0.4 parts carbon powder. This invention can reduce CO2 emissions from float glass production, decrease bubble defects, and improve the quality of the finished glass.

The utility model provides a pre-die for supporting synchronous extrusion of a sidewall and a shoulder pad, which comprises a main plate, a sidewall rubber runner which is obliquely arranged downwards is arranged at the top of the main plate, a seam allowance rubber runner which is obliquely arranged upwards is arranged in the middle of the main plate, and a shoulder pad rubber runner which is obliquely arranged upwards and extends to the sidewall rubber runner is arranged at the bottom of the main plate. The shoulder pad rubber runner and the seam allowance rubber runner are arranged on the left side and the right side of the sidewall rubber runner respectively, and the top of a rubber outlet of the shoulder pad rubber runner and the top of a rubber outlet of the seam allowance rubber runner are located on the same horizontal plane, so that subsequent secondary fitting operation is not needed, the operation steps are reduced, the labor intensity is reduced, the working efficiency is improved, and meanwhile, the production cost is reduced. When the three rubber materials are extruded, a continuous composite interface can be formed, the problem that the tire side is adhered after being reversely wrapped due to deviation of the attaching position in the prior art is solved, the pressure distribution of the rubber materials in the runner is more uniform during synchronous extrusion, the bubble defect of the tire shoulder can be effectively reduced, and the product quality is ensured.

The present application relates to coal gangue resource utilization field, specifically to a kind of coal gangue preparation calcined kaolin for glass fiber method, comprising: coal gangue is ground and homogenized, the obtained homogenized powder is made into concentration 30wt%-40wt% ore pulp, after magnetic separation impurity removal, add dilute acid leaching, then add complexing agent, solid-liquid separation, after drying the refined powder is calcined;Calcined powder is mixed with whitening agent, ground to particle size less than 325 mesh, that is, it is made into.The present application method controls the composition of powder in reasonable range by homogenization, combined with magnetic separation, leaching, complexing selective impurity removal, improve the whiteness of final product;The setting of calcination system can control the COD level of product and inhibit the generation of mullite, so that the product meets the standard of calcined kaolin for glass fiber, and the coal gangue can be used to prepare calcined kaolin for glass fiber at low cost.

The invention discloses a wafer bonding process. The wafer bonding process comprises the steps of providing a top-layer wafer and a bottom-layer wafer to be bonded; first gas is used as a plasma gas source, the bonding surfaces of the top layer wafer and the bottom layer wafer are activated, and the Joule Thomson coefficient of the first gas is smaller than 0; performing surface cleaning on the top layer wafer and the bottom layer wafer; and carrying out a bonding process on the top wafer and the bottom wafer under the condition that the atmosphere environment is the first gas. According to the scheme, the problem that bubble defects are generated in the edge area of the wafer after bonding in the prior art can be solved.

The application provides a foundry production intelligent monitoring method based on the Internet of Things, comprising: if the local difference of the casting liquid viscosity exceeds the preset bubble generation critical viscosity, the bubble generation probability and the bubble size distribution range are determined; if the local difference of the casting liquid viscosity does not exceed the preset bubble generation critical viscosity, the current gating opening timing and the flow distribution are maintained; the multi-gating opening timing is optimized according to the bubble generation probability and the bubble size distribution range, the opening sequence and the gating opening timing deviation of each gating are determined, and the optimized opening timing scheme is generated; the flow distribution proportion of each gating is dynamically adjusted according to the optimized opening timing scheme, the flow distribution initial scheme is generated; the casting liquid flow state feedback data after the execution of the flow distribution initial scheme is obtained, the updated flow distribution scheme is generated; and the foundry filling integrity and the internal stress distribution caused by the pressure fluctuation of the stagnation area are calculated according to the updated flow distribution scheme, so that the internal defect prediction result is obtained.

The utility model discloses a kind of prepreg mould pressing mould without pre-shaping, belong to prepreg mould pressing mould technical field.A kind of prepreg mould pressing mould without pre-shaping, including base frame and the mould set of being set on base frame, air guide mechanism is equipped in the mould set, vacuum system is equipped on the base frame, the vacuum system is used for extracting air in mould set by air guide mechanism, wherein, the mould set includes lower mould and upper mould, the lower mould is made of at least two modules and is slidably connected on base frame;The utility model can save traditional independent pre-shaping process, directly shorten production cycle, and dynamic mould cavity adjustment reduces fiber disturbance, air guide structure cooperates vacuum system to effectively reduce bubble defect, reduce finished product porosity, compatible asymmetric, complex layup design such as curved surface, especially suitable for complex curved surface or variable cross-section structure prepreg product forming.

The invention belongs to the technical field of composite material isolation sleeves, and discloses a forming method of a high-strength composite material isolation sleeve, before resin is cured, a 0.8-1.2 MPa pressure carrier is injected into a bag type male mold cavity, uniform tension in all directions is applied to a continuous fiber prefabricated body through bag body expansion, and a reserved gap between the prefabricated body and a female mold is matched with the tension expansion size. According to the design, the fibers are regularly arranged in the whole curing process, local curling and stacking are avoided, finally, the tensile property of the formed composite material isolation sleeve is greatly improved, the compression strength meets the strict requirement of a magnetic drive pump serving as a pressure-bearing component, and the failure risk caused by disordered fiber stress of a traditional product is fundamentally solved; the method comprises the following steps: firstly, sucking a module cavity for 15-20 minutes under the negative pressure of-0.095 to-0.098 MPa, and thoroughly exhausting air in the cavity; and the defoamed resin is sucked into the cavity by means of negative pressure, and meanwhile, the flow velocity is controlled to prevent fiber displacement, so that the resin is ensured to fully and uniformly infiltrate the preform.

The invention provides a high-performance environment-friendly vertical plane single-component polyurethane waterproof coating and a preparation method of the high-performance environment-friendly vertical plane single-component polyurethane waterproof coating. The polyurethane waterproof coating is prepared from the following raw materials in parts by weight: 22 to 28 parts of modified castor oil polyol prepolymer, 4.5 to 7.5 parts of nano silicon-amine complexing agent, 4.8 to 5.8 parts of diphenylmethane diisocyanate, 3.2 to 4.8 parts of tri-n-butyl citrate, 1.0 to 1.8 parts of nano zinc oxide dispersion liquid, 18 to 24 parts of ground calcium carbonate, 5 to 8 parts of wollastonite fiber, 3 to 5 parts of hydroxyl-terminated polybutadiene, 0.04 to 0.06 part of organic bismuth catalyst and 0.2 to 0.4 part of polysiloxane defoaming agent. 8 to 12 parts of propylene glycol methyl ether acetate, 0.05 to 0.15 part of a titanate coupling agent and 0.1 to 0.2 part of an antioxidant. Through the synergistic effect of all the components, the waterproof coating has good mechanical properties, anti-sagging performance, aging resistance and low-temperature adaptability, and meanwhile the stability of the coating forming process and the final use reliability are guaranteed.

The invention belongs to the field of adhesives, and provides PMMA (polymethyl methacrylate) glue with viscosity regulated and controlled by glacial acetic acid and a preparation method of the PMMA glue. According to the invention, a dual design of synergistic viscosity reduction of a PMMA matrix and free glacial acetic acid and slow release regulation and control of the PMMA-coated glacial acetic acid microcapsule is adopted, accurate regulation and control of the viscosity in a range of 500-50000 mPa.s are realized by controlling the dosage of glacial acetic acid in a range of 2-15 parts by mass, and meanwhile, the microcapsule component gradually releases glacial acetic acid in a glue drying process, so that the viscosity of the microcapsule is reduced, and the viscosity of the microcapsule is reduced. The viscosity rise caused by solvent volatilization is compensated, low viscosity, easy construction and high cohesion strength after drying are guaranteed, the problems that the construction performance and curing strength of traditional PMMA glue are difficult to balance, a high-solid-content system is difficult to defoam, and the storage viscosity stability is poor are solved, and the PMMA glue has wide industrial application value.

The application relates to the technical field of plastic processing equipment, and discloses an environment-friendly plastic granulator for plastic processing, which comprises a bottom box, a treatment barrel for dehumidifying and processing recycled plastics is arranged at the top of the bottom box, a granulation main machine box is arranged on one side of the treatment barrel, and the recycled plastics after multiple treatments in the treatment barrel are subjected to granulation processing treatment; and a preliminary treatment mechanism is used for preliminarily dehumidifying and processing the recycled plastic raw materials after a cleaning process. By increasing and arranging an auxiliary treatment mechanism, the mechanism can not only replace the wet steam in the material pores by dry nitrogen during the pulse drying process, strengthen the removal effect of the internal pore water of thick-wall materials, and improve the defect that the outside is dry and the inside is wet in the traditional drying process, but also remove the combined water in the intermolecular gap of the melt by the nitrogen gas stripping effect during the melt granulation stage, further reduce the hydrolysis reaction probability in the melt state, and reduce the internal bubble defects of the melt.

The utility model provides a shielding layer material mixing and pouring platform of a nuclear storage and transportation container, and belongs to the technical field of spent fuel post-processing, the shielding layer material mixing and pouring platform of the nuclear storage and transportation container comprises a material mixing system and a storage and transportation container which are integrated on a main platform, material mixing and pouring are carried out on the main platform, the operation is convenient and fast, and the working efficiency is improved. The pouring efficiency of the shielding layer can be improved; a first raw material and a second raw material are mixed in the material mixing system, the vacuum system vacuumizes the material mixing system and the shielding interlayer, the materials mixed by the material mixing system enter the material distributor and are conveyed into the corresponding pouring cavities through the material distributing pipes of the material distributor, and multi-path vacuum pouring is performed in the storage and transportation container at the same time. The bubble defect during curing of the shielding material is reduced, the defoaming effect of pouring of the shielding material is guaranteed, the pouring quality of the shielding layer is improved, and meanwhile the pouring efficiency is improved.