79 results about "Air trapping" patented technology

The invention discloses an efficient trapping system of micro-nanometer dust in the air. The invention comprises an air trapping opening, a filter core, a sprayer, a big and small flow micro pump, an atomizing nozzle, a liquid storage chamber, trapping liquid, a baffle and a vacuum pump, which construct an air flow route and a liquid circulation route, the system designs the air containing dust and the trapping liquid to experience four different absorption and trapping processes continuously, so as to realize efficient trapping of the micrometer and nanometer dust composed of various grains. By changing the variety of the trapping liquid or adjusting the hydrophile-lipophile balance (HLB) value of the trapping liquid, and improving the wettability of the trapping liquid and the nano dust in the air, micro nanometer fiber, thin sheet dust and other solid dust particles of various forms, containing micro-nano particles, can be efficiently trapped. The invention designs a plurality of air-liquid continuous contact processes, the air containing dust and the trapping liquid are only mixed and absorbed in the system, thus efficiently trapping nano dust in various dust density environment air including occupation workplaces.

The invention relates to the field of plastic injection molding moulds, and particularly relates to a large-area ultrathin plastic part injection mould. The mould comprises a static mould and a movable mould, wherein the static mould is composed of a static mould fixing plate, and the static template and a static mould core, a movable mould composed of a movable mould fixing plate, a pad, a movable template and a movable template core; the static template is a thickened static template; the pad is a whole square thick steel block; an ejection device is a push board ejection device; an exhaustsystem comprises a group of exhaust plates at the bottom of a mould cavity, an exhaust groove at the periphery of the mould cavity and an exhaust channel connected with the exhaust plates and the exhaust groove; and a compressed air blow pipe leading the exhaust channel to generate negative pressure is arranged on the exhaust channel. The mould has high strength, the service life is up to 2 million times; the exhaust is smooth, and adverse phenomena, such as insufficient filling, burning, air trapping, heavy fused connecting wire and the like, are prevented, so that the purpose of large area of 1,429mm<2> and ultrathin of 0.18mm molding is achieved; and the extrusion or deformation of a product is effectively avoided by adopting the push board ejection device.

Methods and systems for assessing lung function using volumetric images obtained at inspiration and expiration. The method may include processing the first and second set of images to identify known anatomical structures of the lungs, registering the first set of images to the second set of images to match voxels of the first set of images to voxels of the second set of images as matched pairs of inspiratory and expiratory voxels, calculating a continuous probability of a lung characteristic at a location of the matched pairs of voxels, and displaying the result on a display. The method may also include classifying lung tissue at each location as normal, having air trapping without emphysema, or being emphysematous.

A counterweighted weedless fishing float suitable for suspending at least part of an attractant, such as live bait or an insect replica, above the surface of water in which the float is borne, and kits for assembling a variety of attractants, are provided. The float is counterweighted, and may comprise a plurality of air-trapping channels arranged within it to trap an amount of air sufficient to support the float and a connected attractant. In other embodiments, the float may comprise one or more sealed chambers to provide buoyancy. The float may be disguised as a water plant, fallen tree leaf, twig or other floating detritus or water creature. The attractant may replicate an insect such as a dragonfly, an insect larva such as a hellgrammite, or any other natural or artificial fish bait or prey. The float includes an adjustable stem so that the relative position of the attractant or bait with respect to the float and the water surface may be changed depending on the particular fish sought or the conditions present. In one form, the specific gravity of the invention may be adjusted by adding weights to vary its floating characteristics.

The invention provides a method for improving the CAE analysis precision in the high-pressure casting mold-filling process and belongs to the technical field of numerical simulation of casting computers. The method comprises the specific steps that 1, the high-pressure mold-filling process of a casting is simulated by using CAE software, CAE analysis parameters are set according to a process in actual production, and CAE simulation is conducted on the high-pressure casting process; 2, a high-pressure casting visualization device is applied to shoot the high-pressure mold-filling process of the casting; 3, a CAE analysis result is compared with an actual shooting result, main factors affecting the mold-filling precision for CAE analysis are found, input parameters for CAE analysis are corrected, and the CAE analysis precision is improved. The part which does not conform to the actual situation in CAE simulation analysis can be accurately looked up, the cause of difference existing is analyzed in a targeted mode, a numerical simulation calculation model is modified by modifying the CAE simulation parameters, then the modified numerical simulation calculation model is applied to the casting complicated in structure, a mold casting system is optimized, and the mold-filling defects such as air trapping, air involving, misrun and oxidization and slag inclusion produced by improper design of the mold casting system are avoided.

The present invention relates to a kind of multicomponent and multiple boundary layer composite heat insulating material and its production process. The composite heat insulating material is produced through arranging and adhering the following layers: superfine polypropylene non-woven fabric layer as the main air blocking layer, infrared radiation layer, down-like polyester/polypropylene layer as the main air trapping layer, infrared radiation and air blocking layer, and air holding hollow 3D crimping polyester layer. It has the thermal protection quality of 1.03-1.45clo, vapor transfer rate of 6200-8214g/sq m .24h, and air permeability of 2617-3267 ml/sq m .s. The composite heat insulating material has the advantages of being waterproof, poromeric, wind-proof, heat insulating and light.

The invention belongs to the injection mould field and provides a mould for shaping a mobile phone light guide panel. The mould comprises a first injection mould used for shaping a PC board and a second injection mould used for shaping silicone keypad bases on the PC board, wherein raised adhesive-pressing lines are arranged on the periphery of cavities which are used for shaping the silicone keypad bases and arranged on a front mould core of the second injection mould, and a back mould core of the second injection mould is provided with a material cutting groove. The invention also provides a technology for preparing the mobile phone light guide panel. Compared with the prior art, the invention adopts a special structure, namely the adhesive-pressing lines; when the silicone keypad basesare shaped on the PC board, the adhesive can not overflow on the periphery of the mobile phone light guide panel and near the silicone keypad bases and inner bores, thus avoiding the process of removing excessive adhesive manually, greatly increasing the production efficiency and lowering the production cost; and the invention adopts the structure of the material cutting groove, thus avoiding thephenomenon of air trapping in the cavity of the mould, ensuring the appearance quality of the product, reducing the reject ratio and increasing the product quality.

A method controls an expiratory gas flow at a user interface (16) of a ventilator (1) wherein the user interface (16) has an exhalation valve (11), which provides a positive end-expiratory pressure (PEEP). The method includes the following steps during a phase of exhalation: changing the positive end-expiratory pressure from a basic PEEP value (31) with the exhalation valve (11); returning the positive end-expiratory pressure to the basic PEEP value (31) with the exhalation valve (11); and determining an exhalation parameter. The method permits an adaptive change in the expiratory flow during the exhalation. Air trapping can be avoided, and it is possible to respond to changed exhalation parameters within one and the same phase of exhalation.

The invention provides a mould pressing device of a composite material. The mould pressing device of the composite material comprises an upper hot press plate, a concave mould, a convex mould and a lower hot press plate, wherein the concave mould comprises a middle sunken area and a platform area surrounding the sunken area; the convex mould comprises a middle protruded area and a platform area surrounding the protruded area; at least one exhaust slot is formed in an adjacent area of the platform area and the sunken area of the convex mould. A mould pressing method of the composite material, which is further provided by the invention, comprises a process of controlling the upper hot press plate and the lower hot press plate to tight fold the concave mould and the convex mould so as to heat and pressurize materials in a mould, wherein air in the mould is discharged through the exhaust slot in the heating and pressurizing process. According to the mould pressing device and the mould pressing method of the composite material, which are provided by the invention, the problem of air trapping in a mould pressing process can be effectively solved, and the surface effect of product shells is improved.

The invention discloses a structure for rapid core exchange and airflow automatic regulation of an atomizer. The structure comprises a first atomizer housing, a heating wire, an upper atomizer base, a fixed pin, a silica gel ring, an upper insulating cover, an atomizer upper positive electrode, an atomizer housing, a floating head, an atomizer base main body, a spring, an atomizer regulating ring, a conducive copper ring and a lower atomizer base, wherein one end of the heating wire is fixedly arranged on the upper atomizer base by virtue of the fixed pin, and the other end of the heating wire runs through the atomizer base main body and is connected to the atomizer upper positive electrode; the atomizer base is arranged at the bottom end of the atomizer base main body; the atomizer regulating ring is arranged at the outer end of the atomizer base main body; and the first atomizer housing is arranged outside the atomizer base. Through structural design, the structure can be used for improving the problems that the heating wire is not removable as a whole and is difficult to install as well as the problems of unsmooth airflow, oil leak, air trapping and the like, so as to effectively achieve the purposes of conveniently removing and exchanging the heating wire and automatically regulating airflow.

The invention discloses a high-strength carbon fiber upper cover mold. The high-strength carbon fiber upper cover mold comprises an injection molding machine, a first female mold, a second female mold and a male mold; the first female mold and the second female mold are fixed on the injection molding machine; the male mold is driven to rotate by the injection molding machine, and is respectively closed with the first female mold and the second female mold; the male mold and the first female mold are closed to form a first injection mold for injecting hard plastic; the male mold and the second female mold are closed to form a second injection mold for injecting soft plastic; and carbon fiber products are arranged in the male mold. The high-strength carbon fiber upper cover mold can produce bicolor upper cover injection parts with PC plus carbon fibers and surrounded by TPE soft plastic on a large scale; and the produced plastic products are high in strength, beautiful and excellent in touch. The high-strength carbon fiber upper cover mold is excellent in exhaust, effectively solves the difficulty of easiness in air trapping in carbon fiber plastic injection, and improves the product yield. The injection products adopt bicolor injection molding, are excellent in bonding of soft and hard plastic, and are beautiful in surfaces. The mold is high in precision, is high in closing precision of two sets of molds in injection, and has no other defects such as burrs and bad exhaust.

The invention relates to the technical field of injection molding and discloses a needle vale control system for cold runner sprues. The needle vale control system comprises a front mold, a rear mold, a needle valve hot sprue and a runner assembly, wherein the needle valve hot sprue is used for outputting molten-state plastic, and the runner assembly is mounted on the needle valve hot sprue. The runner assembly is internally provided with a runner which can allow the molten-state plastic to flow therein. The runner assembly is provided with one or more normally-opened sprues and one or more controllable sprues. A control structure is arranged at each controllable sprue, wherein each control structure is used for controlling the corresponding controllable sprue to be opened and closed. By means of the needle vale control system for the cold runner sprues, different numbers of normally-opened sprues and controllable sprues can be designed as needed; each controllable sprue is controlled to be opened and closed according to different injection molding process requirements, thus the injection molding sequence of the multiple sprues can be controlled, and injection molding is conducted at the same time at multiple points; due to the fact that the number of needle valves is reduced, the space occupied by the needle vale control system is small; and after injection molding is achieved, injection molding defects such as welding marks and air trapping cannot be generated easily.

The invention discloses a drainage pump and a washing machine with the same. The drainage pump includes a pump shell, a piston assembly, an impeller and a driving device, wherein the pump shell is internally provided with a drainage cavity, and a water inlet and a water outlet which are communicated with the drainage cavity are formed in the pump shell; the piston assembly is movably arranged on the pump shell, and an air storage cavity which is communicated with the drainage cavity and has a variable volume is defined on the pump shell by the piston assembly; the impeller is rotatablely arranged in the drainage cavity; the driving device is installed on the pump shell and in transmission connection with the impeller. According to the drainage pump, by arranging the piston assembly, and adopting the piston assembly and the pump shell to define the air storage cavity with the variable volume, the piston assembly can move according to the work conditions of the drainage pump, therefore,the capacity of the air storage cavity can be increased or decreased, it is ensured that water flow can be normally sucked and discharged, the problem of air trapping is effectively solved, and then the work efficiency of the drainage pump is improved.

The present invention discloses a mobile motherboard heat dissipation graphite sheet. The sheet comprises a square-shaped heat-dissipating tube; a plurality of inner fins are symmetrically and uniformly distributed on two corresponding sides of the inner portion of the tube wall of the heat-dissipating tube; the inner fins are embedded in a graphite basal body; the heat-dissipating tube wraps thegraphite basal body; a plurality of external fins are symmetrically arranged on the other two opposite sides of the outer portion of the tube wall of the heat-dissipating tube; and the outer side of the tube wall of the heat-dissipating tube is uniformly coated with a spray layer. According to the mobile motherboard heat dissipation graphite sheet of the invention, aluminum alloy with high thermalconductivity is adopted; the inner wall and outer wall of the heat-dissipating tube are provided with the fins; the inner wall is in full contact with the graphite sheet, the heat dissipation area ofthe outer wall is large, and therefore, a heat dissipation rate can be greatly improved; and heat dissipation holes are formed in the graphite sheet, when the graphite sheet is bonded, air can be discharged easily through the heat dissipation holes, and therefore, air trapping can be avoided, the bonding quality of the graphite sheet and an electronic product is improved, and thus, the heat dissipation effect of the graphite sheet is improved, at the same time, assembly efficiency is improved, and production costs are reduced.

The invention discloses a novel chill coating sand core mold capable of exhausting air. The novel chill coating sand core mold comprises a central chill, and a sand core is arranged on the periphery of the central chill; a central exhaust hole is formed in the central chill in a penetrating manner from up to down; five rows of small exhaust holes are drilled in the side wall, in contact with the sand core, of the central chill; the small exhaust holes extend into the central chill and communicate with the central exhaust hole; the horizontal section of the central exhaust hole is circular; thediameter of the small exhaust holes is 3 mm; ten small exhaust holes are in each row; and the sand core is of a cylindrical structure of which the interior is hollow. According to the novel chill coating sand core mold, the structure is simple, stable and reliable, the air trapping phenomenon in a product can be quickly and effectively eliminated, and casting cost is reduced.

The invention pertains to the technical field of air pumping and compressing devices, and in particular relates to a fan-typed air pump which realizes the pumping of compressed air continuously in large flow. The fan-typed air pump comprises a shell provided with an air inlet and an air outlet, and the air inlet is communicated with an air supplying device while the air outlet is communicated with an air consumption device; an air shell which can rotate relatively to the shell is arranged inside the shell; the air shell is internally provided with an air trapping sheet and a plurality of fan blades are arranged between the air trapping sheet and the air shell, the fan blades are evenly distributed around the center of the air trapping sheet; air paths are reserved among the fan blades as well as the periphery of the air trapping sheet and the inner wall of the air shell; an air intake hole is cut at one side of the air shell, which is provided with the fan blades, while an air outtake hole is cut at the other side thereof, and the air intake hole is communicated with the air inlet of the shell while the air outtake hole is communicated with the air outlet of the shell; the center of the air trapping sheet is connected with a rotary shaft which passes through the air intake hole to be connected with a motor. The fan-typed air pump realizes the pumping of the compressed air continuously in large flow and can be applied to highly effective air supply on various occasions.

The invention provides an injection mold comprising a first mold core, a second mold core, a third mold core, a mold insert and an exhaust device. The second mold core is provided with an inlaying channel, and the third mold core is provided with an exhaust channel arranged correspondingly to the inlaying channel; the exhaust channel is connected with the exhaust device, and the mold insert is inlaid in the inlaying channel; spacing for air to pass is formed between the inner walls of the mold insert and the inlaying channel; when the first mold core, the second mold core and the third mold core are combined through injection molding, a cavity is formed between the first mold core and the second mold core, and the inlaying channel communicates with the cavity and the exhaust channel; molten plastic in the cavity is prevented from entering the exhaust channel by the mold insert, and the exhaust device is used for vacuum-pumping the exhaust channel so that air in the cavity is pumped out. According to the injection mold, the rate of air discharge of the injection mold can be improved, and the air trapping phenomenon of the injection mold can be eliminated effectively, so that the quality of products produced with the injection mold is improved.

The invention discloses a corner streamhandling method for the double-layer injection molding of LED light-guide components. According to the method, a double-layer injection mold for carrying out injection molding on thick-walled light-guide components is adopted, and comprises a primary injection mold cavity part and a secondary injection mold cavity part which are respectively in the shape of a Chinese character 'tu' corresponding to the shape of the cross section of a product and in the shape of a Chinese character 'ao' corresponding to the shape of the cross section of the product. The method is characterized by comprising the following steps: setting a basic mold cavity wall thickness between the inner side and outer side of a portion, for forming the part in the shape of a Chinese character 'ao' at a corner of a light-guide component, of the secondary injection mold cavity; carrying out wall thickness compensation adjustment: the wall thickness difference is sequentially increased, i.e. the wall thickness of the outside cavity, for forming the part in the shape of a Chinese character 'ao' at the corner of the light-guide component, of the secondary injection mold cavity is increased by 0.1-0.3 mm, and the wall thickness of the inside cavity of the secondary injection mold cavity is correspondingly reduced by 0.1-0.3 mm; and respectively gradually increasing and reducing the curvatures of the inner side and outer side of a portion formed at the corner of the light-guide component, of the secondary injection mold cavity, so that the flow speed of an injection molding fluid flowing through the corner of the secondary injection mold cavity and reaching a vehicle headlight is consistent, and a defect of air trapping does not occur in the process of injection molding.

The invention provides a hot runner structure, an injection mold, a machining method and an injection method. The hot runner structure comprises a first hot runner insert, a second hot runner insert, a hot runner plate and a hot nozzle; the second hot runner insert is arranged on the outer side of the first hot runner insert in a sleeving manner, the outer wall of the first hot inner inset and/or the inner wall of the second hot runner insert are/is provided with a spiral groove which serves as a first hot runner, a second hot runner is arranged on the hot runner plate, and the second hot runner is connected with one end of the first hot runner; a third hot runner is arranged on the hot nozzle, one end of the third hot runner and the other end of the first hot runner are connected, and the other end of the third hot runner serves as a hot nozzle sprue. The first spiral hot runner is arranged, and therefore in the injection process, no dead corners exist in the hot runners, and encapsulation air trapping is avoided.

The invention discloses a back column upper decoration plate and a mold and an injection molding method of the back column upper decoration plate. A deep-hole structure is arranged on the back column upper decoration plate and comprises hole side walls, wherein structures for preventing material flow from passing through the hole side walls are arranged on the hole side walls on two opposite sides. The mold of the back column upper decoration plate comprises a deep-hole structure cavity, wherein a flow choking hole forming block for forming a flow choking hole is respectively arranged on two side walls of the deep-hole structure cavity. The injection molding method of the back column upper decoration plate comprises the steps of adjusting the material flow direction to enable the two flow choking hole forming blocks to be respectively located on two sides of the material flow direction, enabling material flow 1 and material flow 2 to be converged in advance, enabling the material flow to flow downwards to be converged at the top of the deep-hole structure, and enabling air to be discharged through an exhaust mechanism at the bottom of the deep-hole structure cavity so as to avoid air trapping. The defects of air marks on the product surface nearby the deep-hole structure and other appearance problems are overcome, a product with good appearance is obtained, and batch production is successively achieved. In addition, the improved portion of the mold is simple in structure and easy to achieve, and only a little cost is increased.

The invention relates to an over mold structure used for a long and thin region on a tool handle. The over mold structure comprises a hard rubber body of the handle, a fixed mold insert, glue-sealing slots, rubber-sealing positions, breathable steel inserts, a body cavity surface and a fixed mold insert cavity surface. The convex height size of the rubber-sealing positions and the corresponding concave depth size of the glue-sealing slots are in interference fit when the mold is clamped, so that a pressing force is generated between the fixed mold insert rubber-sealing positions and the glue-sealing slots corresponding to a product hard rubber body after the mold is clamped; the rubber-sealing position in an air-trapping portion of the fixed mold insert cavity is in a breathable steel mosaic structure, and joint surfaces of the breathable steel inserts and corresponding rubber-sealing positions are in close fit. The over mold structure has the beneficial effects that excessive glue is prevented through interference fit of the rubber-sealing positions; the exhaust problem is overcome by the close fit of the breathable steel inserts; parting line traces at enchased parts on a product surface is lightened; and excellent and good rate of products is increased.

The invention relates to an injection molding method of an injection molding part for an automobile lamp. The injection molding method comprises: firstly performing analogue simulation analysis on a part to be subjected to injection molding, and continuously adjusting distribution of a local wall thickness of the part to be subjected to injection molding till a welding line of the part to be subjected to injection molding is adjusted to an invisible region; and then adjusting the flow of a material flow in the set region of an injection mold according to the part to be subjected to injection molding of which the wall thickness distribution is well adjusted, such that the position and shape of a flowing leading edge of a charging flow on a section of the set region are adjusted and controlled, the flowing leading edges of more than two charging flows are converged in a designated region, and air trapping is eliminated. According to the injection molding method, the wall thickness distribution of a product can be defined in a pre-design phase of the product, the cost of subsequent mold repair is greatly saved, and a mold trial period is shortened. The problems of the existing injection molding manner that the cost is higher and the period is longer caused by request of subsequent mold repair and mold trial are solved.