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266results about How to "Easy size adjustment" patented technology
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Implantable devices useful for reinforcing a surgically created stoma
An implantable tissue reinforcement device useful for treating or preventing the formation of parastomal hernias forming about a surgically created stoma. The tissue reinforcement device can comprise a synthetic or mammalian-derived sheet-like graft member, such as a resorbable material that promotes tissue ingrowth, wherein a sizing pattern is included that comprises linear indicia radiating outward from a stomal aperture. The linear indicia facilitate creation of a resized stomal opening in the graft member sufficiently large to allow passage of the resected bowel portion. A series of cuts made along the indicia create a plurality of flaps about the resized opening that are configured to abut the bowel portion and enhance reinforcement the stomal region after implantation. In one embodiment, the linear indicia comprises a series of weakened (e.g., perforated) lines that facilitate the cutting of the material by a scalpel, scissors, etc. The clinician resizes the stomal opening to a known diameter using reference indicia, such as diameter indicia and circular guide indicia. The sizing pattern can be imprinted on or etched into the material of the graft member, or it can be at least partially located on a separate template that is either laid over the graft member, preattached as a cuttable overlay, or used as a reference guide.
Owner:COOK BIOTECH
Patterned substrate etching method
InactiveCN102456545AEasy size adjustmentIncrease flexibilityAfter-treatment detailsSemiconductor/solid-state device manufacturingEtchingPatterned substrate
The invention provides a patterned substrate etching method. The patterned substrate etching method comprises the following steps of: providing a substrate; forming a photoetched pattern on the substrate; carrying out primary etching on the substrate at a first process pressure and a first bottom radio frequency power by using a first etching gas; and carrying out secondary etching on the substrate at a second process pressure and a second bottom radio frequency power by using a second etching gas, wherein the flow value of the second etching gas is less than that of the first etching gas; the pressure value of the second process pressure is less than that of the first process pressure; and the radio frequency power value of the second bottom radio frequency power is more than that of the first bottom radio frequency power. According to the invention, through twice etching, a PSS (Patterned Substrate) pattern with smooth side wall, smooth transition and no corner can be obtained; the size of the pattern is easy to adjust; and the substrate with good crystal quality is provided for the follow-up film epitaxial process.
Owner:BEIJING NAURA MICROELECTRONICS EQUIP CO LTD
Anti-seismic measure and construction method of a high earth-rock dam
ActiveCN102261053ASmall sizeImprove skid resistanceEarth-fill damsRock-fill damsRockfill materialEarthquake resistant structures
Owner:HOHAI UNIV
Animal vest and camera mount
InactiveUS20160015003A1Resistant to unravelingEasily enlargedTravelling sacksAnimal housingEngineeringMechanical engineering
The disclosure generally relates to a canine vest, and a mounting system for mounting a device, such as camera, to the canine vest. The mounting system can include two mounting bases and a mounting plate. Each mounting base can include both a first attachment portion configured for at least partially securing the mounting base to the canine vest, and a second attachment portion configured for at least partially securing the mounting base to the mounting plate.
Owner:THE KYJEN CO LLC
Rock-class test piece mould for field of rock mechanics
InactiveCN102620967AAchieve multi-purposeVersatilePreparing sample for investigationEngineeringModel test
The invention discloses a rock-class test piece mould for the field of rock mechanics, which comprises a base, a middle mould frame and an upper pressure plate. The rock-class test piece mould is characterized in that the middle mould frame comprises four side plates and four guide columns, the four guide columns are arranged on the four side plates, each side plate comprises an inner surface, anouter surface and four side surfaces, the guide columns are arranged on the outer surface of the side plates, and the first side surface of each side plate is arranged on the inner surface of the adjacent side plate. The rock-class test piece mould overcomes the defects that conventional related moulds can be used for preparation of fixed dimension test pieces only by the aid of a slidable dimension-variable device, realizes pressing of dimension-variable test pieces made of similar materials and guarantees mechanic performance of the test pieces made of similar materials effectively. The rock-class test piece mould can be widely applied to geomechanics model testing research in the fields of hydroelectric power, communication, energy resources, resources, national defense and the like, and effectively guarantees high-quality implement of three-dimensional geomechanics model testing.
Owner:HOHAI UNIV
Ear wearable device
ActiveUS20190014403A1Easy size adjustmentPrecise resizingMicrophonesLoudspeakersEngineeringLoudspeaker
An ear wearable device comprising: a housing comprising a portion shaped to be inserted into a concha of the ear, a speaker disposed inside the housing and configured to be disposed in an auditory canal when the housing is inserted into the concha of the ear, a button emerging from a hole formed in the housing, an elastic member disposed in the housing and elastically resisting an external force against the button; and a movable member including a portion protruding through an opening formed in the housing, and configured to be pushed into the opening or pulled away from the opening such that the protruding portion can be pushed or pulled when the button is pressed.
Owner:SAMSUNG ELECTRONICS CO LTD
Laparoscopic retractor devices
Some devices for atraumatic retraction of tissue include a transcatheter deployable mesh hammock that is well-suited for laparoscopic, endoscopic, and robotic surgeries. Methods for atraumatic retraction of tissue include wrapping a mesh material around the tissue in a cradle-like fashion. In some embodiments, magnetic coupling of the proximal and distal ends of the mesh material can provide tissue containment and retractor securement to facilitate tissue retraction.
Owner:MAYO FOUND FOR MEDICAL EDUCATION & RES
External incontinence device
InactiveUS6904916B2Easy size adjustmentAppropriate usePenis support devicesAnti-incontinence devicesUrethraShort urethra
An external incontinence device for use in male urinary incontinence. The device is easy to fasten and unfasten with one hand to selectively apply pressure against the urethra. In one embodiment, the device includes an outer strap, which overlaps itself through a gate, and locks in position at desired tension. A lever on the strap, which can be easily lifted to unfasten the strap, achieves release. Desired pressure is preferably applied against the urethra with an inner lining. The lining can be lifted to achieve pressure against the urethra by pressing a button. The button can be locked in position to achieve continence by either a groove or ridge mechanism or by a ballpoint pen ratchet mechanism. The pressure can be released by pressing and tilting the groove and ridge mechanism, or by pushing the ballpoint pen mechanism again. The present device preferably allows the user to void through the urethra without removal of the device.
Owner:BAKANE RAMESH
Method for preparing hard open-cell polyimide foam
The present invention relates to a method for preparing hard open-cell polyimide foam, and belongs to the technical field of preparation of macromolecular polyimide foam materials. The method comprises the following steps: adding aromatic dianhydride into a polar solvent, and then adding fatty alcohol, so as to perform heating reaction; adding a catalyst, deionized water and a foam stabilizer, so as to obtain precursor solution; mixing the precursor solution with an end-capped reagent end-capped polyisocyanate, leaving to stand, foaming, crushing and drying, so as to obtain powder; putting the powder into a pressure vessel, and performing heating and pressurization, so as to obtain a polyimide foam material. The method has the characteristics that the solvent is small in volatile quantity and can be recycled during foam preparation, and is applied to various anhydride systems, the preparation cost is low, and mass production is easy to realize. The formed foam material has the characteristics that a foam structure is uniform, the apparent density is adjustable, the material is heat-resistant, high in strength, and drop of dregs hardly occurs.
Owner:AEROSPACE RES INST OF MATERIAL & PROCESSING TECH +2
Method for processing micro-pit arrays on metal surface
InactiveCN103526266AReduce processing costsEasy to operateElectrophoretic coatingsElectrophoresisRoom temperature
The invention relates to a method for processing micro-pit arrays on a metal surface. The method comprises the steps of (a) performing uniform electrophoretic-coating of a layer of film (3) formed by non-metal microparticles (1) on a surface of a to-be-processed workpiece; (b) after drying the film on the surface of the to-be-processed workpiece, roasting for 30-90 minutes under glass transition temperature of the non-metal microparticles, and naturally cooling to room temperature; (c) placing the surface of the to-be-processed workpiece which is coated with the film in chemical corrosive liquid or electrolyte, and performing chemical or electrochemical corrosion processing while slightly stirring; (d) stopping corrosion processing after the film on the surface of the to-be-processed workpiece falls off, taking out the workpiece, flushing and drying the workpiece. The method is low in process cost, flexible and efficient, and can be used for processing densely distributed micro-pit arrays on the three-dimensional complex and large metal surface.
Owner:HENAN POLYTECHNIC UNIV
Automobile part welding workbench
InactiveCN105397370AConvenient for welders to workImprove work efficiencyWelding/cutting auxillary devicesAuxillary welding devicesSize adjustmentEngineering
The invention provides an automobile part welding workbench which comprises a workbench body. The workbench body is provided with a rotating disc. A rotary motor is arranged at the lower end of the rotating disc in the workbench body. The rotating disc is driven by the rotary motor to rotate. The two sides of the rotating disc are provided with fixing containing frames respectively. The fixing containing frames are arranged on the workbench body through bent rods arranged at the lower ends of the fixing containing frames. Smoke suction covers are arranged above the rotating disc. A smoke concentration detection device is arranged beside the workbench body. A clamp on the rotating disc is driven by the rotating disc on the workbench body to rotate, and work of welding personnel is facilitated; a welding gun is fixedly arranged through the fixing containing frames, the fixed welding portions are welded automatically, and working efficiency is improved; and a return baffle and a limiting block are arranged, the initial position of the rotating disc is limited, and operators can conduct size adjustment and product clamping conveniently.
Owner:WUHU POWER TECH
Flexible side drawing device for forming panel veneer
InactiveCN102179453AShorten the development cycleEvenly distributedMetal-working feeding devicesPositioning devicesEngineeringMechanical engineering
The invention discloses a flexible side drawing device for forming panel veneer, relates to plastic processing equipment for forming a curved surface of a plate like piece, and belongs to the field of mechanical engineering. The device mainly comprises a plurality of material clamping mechanisms (1), a plurality of material drawing mechanisms (2) and a supporting frame (3); and the plurality of the material clamping mechanisms (1) clamp the periphery of plate veneer (4) to be processed and the plurality of the material drawing mechanisms (2) apply side drawing force in different directions of the plate veneer (4). The device can be matched with various stamping dies with different sizes and shapes, so that the design and manufacturing cost of the module for forming the plate like part are saved, and disadvantages of corrugation, pull cracks and the like caused when the plate like part is formed are inhibited.
Owner:JILIN UNIV
Multifunctional fuel gas stove
InactiveCN1461912AVersatileEasy size adjustmentDomestic stoves or rangesLighting and heating apparatusInlet channelReed relay
A multifunctional gas stove is composed of electromagnetic valve for power supply arranged in gas inlet channel, gas jet hole for normal fire flame, thermocouple electromagnetic valve with thermal sensor near the burner of normal fire flame, primary flame regulating valve, and pulse igniter with a normal closed reed relay, which plays such role that after ignition is finished the igniter can not be used and when the flame is accidently extinguished, the igniter can be automatically used.
Owner:陈振农
An intelligent identification and retrieval method for three-dimensional processing characteristics
InactiveCN109783887AEasy to adjust sizeSmall sizeNeural architecturesNeural learning methodsData setModel parameters
The invention discloses an intelligent identification and retrieval method for three-dimensional processing characteristics. The method comprises the following steps: firstly, obtaining a processing characteristic three-dimensional model; Performing voxelization processing on the three-dimensional model; Performing data enhancement processing on the voxelization model to obtain a three-dimensionalmodel data set; Then constructing a three-dimensional convolutional neural network, training a three-dimensional model and recording model parameters; Then inputting a three-dimensional model, and performing voxelization processing on the three-dimensional model of the processing characteristics; And calculating the similarity between the retrieval model and the data set model according to the recorded model parameters to obtain the probability that the model belongs to each category, and finally arranging and outputting a retrieval result according to a descending order. The method is smallin calculated amount and high in recognition speed, and has higher three-dimensional processing feature recognition and retrieval accuracy.
Owner:XI AN JIAOTONG UNIV
Graphics compression
InactiveUS7307642B2Size of fileMinimized in sizeDrawing from basic elementsImage codingImaging qualityData file
A method of manipulating a vector graphics data file representative of at least one graphics element defined by a set of co-ordinate values in a graphics image, the method comprising the step of scaling down the at least one graphics element by applying a scaling factor to the set of co-ordinate values defining the at least one graphics element. There is also disclosed a method of previewing a vector graphics image composed of a plurality of graphics elements comprising the steps of: parsing a vector graphics data file into individual graphics elements; selecting at least one graphics element; selecting and applying a scaling factor to a set of co-ordinate values defining the at least one selected graphics element; applying an inverse of the scaling factor to the set of co-ordinate values defining the at least one selected graphics element; displaying the graphics image including the graphics element having the scaling factor and inverse scaling factor applied thereto; and providing an indication of data file compression as a result of said scaling such that the effect of the scaling on image quality and data file size can be appreciated.
Owner:IDEAWORKS 3D
Bearing-rotor system loading test device and method
InactiveCN101915662ALoad securityEasy size adjustmentMachine bearings testingDynamic balanceCoupling
The invention discloses a bearing-rotor system loading test device and a bearing-rotor system loading test method. The device comprises a static pressure gas bearing, a floating coupling, a pressure sensor, a cylinder, a loading bracket, a direction control valve, a pressure regulation valve A and a pressure regulation valve B, wherein the cylinder is fixed on the loading bracket; the cylinder and the direction control valve are connected through an air pipe and a quick coupling; the direction control valve is connected with an air inlet pipe through the pressure regulation valve A; and the static pressure gas bearing is connected with the air inlet pipe through the pressure regulation valve B. Through the device and the method, an air film is formed between the static pressure gas bearing and a test rotor so as to realize non-contact loading, the rotor can be loaded in the static state or high-speed rotation state, the loading is safe and the loading force is convenient to regulate. During the loading, the non-contact loading method ensures that the dynamic balance property of the rotor is not influenced during the loading and the loading can be performed in the static state, high-speed state and super-high-speed state.
Owner:DALIAN MARITIME UNIVERSITY
Vehicle body self-levelling test stand
PendingCN106855465AWith body self-leveling functionReal-time output of body pose informationVehicle testingAttitude controlHydraulic cylinderControl signal
The invention provides a vehicle body self-levelling test stand. The test stand comprises a road spectrum excitation device, a road spectrum excitation hydraulic system, a road spectrum excitation control system, a vehicle body self-levelling device, a vehicle body self-levelling hydraulic system and a vehicle body self-levelling control system, wherein the road spectrum excitation hydraulic system controls the extending speed and displacement of a piston rod of an excitation servo hydraulic cylinder corresponding to the road spectrum excitation device on the basis of received excitation signals of the road spectrum excitation control system to simulate actual complicated road conditions; under excitation of road spectrum excitation independent modules below the vehicle body self-levelling device, the vehicle body self-levelling control system generates corresponding vehicle body self-levelling control signals and sends the corresponding vehicle body self-levelling control signals to the vehicle body self-levelling hydraulic system on the basis of collected vehicle body posture information of the vehicle body self-levelling device to further control the extending speed and displacement of the piston rod of a levelling servo hydraulic cylinder corresponding to the vehicle body self-levelling device, so that self-levelling of a vehicle body is realized. According to the vehicle body self-levelling test stand, the actual complicated road conditions can be simulated, and the self-levelling function detection is realized.
Owner:JILIN UNIV
Method of forming filament-reinforced composite thermoplastic pressure vessel fitting assembly
ActiveUS7100262B2Easy size adjustmentEasy to relocateCoatingsVessel mounting detailsPlastic materialsPressure vessel
A method of forming a fitting assembly in a filament-reinforced pressure vessel, and a pressure vessel having a fitting assembly secured therein. In the method, a first fitting portion is bonded to an inner surface of a thermoplastic liner in a fluid tight manner. A layer of commingled reinforcing filaments and plastic material is applied to an outer surface of the thermoplastic liner to form a vessel wall. A portion of the vessel wall adjacent to the opening bounded by the fluid-tight seal between the first fitting portion and the inner surface of the thermoplastic liner is removed. Then, a second fitting portion is bonded to the first fitting portion so as to define a port for access into the interior of the vessel.
Owner:ENPRESS
Artificial snowing device
ActiveCN101240963ARealistic artificial snowfallEasy to adjustRecreational ice productionLighting and heating apparatusVena contracta diameterEngineering
Disclosed is an artificial snow apparatus, a rotary shaft being rotated by a dynamic mechanism and vertical relative to an orifice plate that is positioned on the bottom of the case body and has orifices allowing snow to pass through. A scraper contacting and working with the orifice plate is circumferentially connected to the rotary shaft and arranged in the upper side of the orifice plate, with space in the case body for storing snow. The invention is capable of controlling snow speed with the appearance of artificial snow more close to natural snow.
Owner:GREE ELECTRIC APPLIANCES INC
Power slide device for vehicle seat
InactiveCN102066151AEasy Size AdjustmentSmall amount of flexionGearingMovable seatsMultiple pointAxial force
The present invention provides a power slide device for a vehicle seat, configured such that an upper rail is moved in the front-rear direction by rotation and drive of a screw rod. A screw rod support rail is provided with a pair of load transmitting members separated in the front-rear direction, and the screw rod is provided with a load receiving member making contact with the pair of load transmitting members. When buckling occurs in the screw rod due to an axial force acting on the screw rod, the buckling is supported at multiple points, and this limits the direction of the buckling to reduce the amount of the buckling.
Owner:SHIROKI KOGYO CO LTD
Method for optimizing area of mixed signal chip
ActiveCN101673311AAvoid wasted areaReduce the use of capacitors or resistorsSpecial data processing applicationsEmbedded systemCapacitance
The invention discloses a method for optimizing the area of a mixed signal chip, which relates to the technical field of integrated circuit. The method of the invention comprises the following steps:(1) when designing an IP layout, separating resistors or capacitors out of the IP to reduce the IP area substantially; (2) arranging the prepared IP and other logic units to obtain the area of the whole chip; and (3) placing the resistors or the capacitors which are separated out on a chip power ring, under a pad or in a wiring area which is different from the metal layer used by the resistors orthe capacitors. Compared with the prior art, the invention ensures the IP performance and simultaneously reduces the IP area, further optimizes the chip area, does not generate a waste area, and savesthe numbers of the resistors and the capacitors.
Owner:BEIJING TONGFANG MICROELECTRONICS
On-site verification apparatus for optical fiber current sensor
ActiveCN103616651ASolve the lock-up problemReduce latch-upMeasurement using digital techniquesWavelength filterCurrent sensor
The invention relates to an on-site verification apparatus for an optical fiber current sensor, a usage method of the on-site verification apparatus and application of the on-site verification apparatus. The on-site verification apparatus for the optical fiber current sensor includes an optical fiber current detection sensing module and an optical fiber current detection processing and display module. The optical fiber current detection sensing module is composed of a light source, a linear polariscope, a polarization separator, a modulator, a transmission optical fiber, a 1 / 4 wavelength filter, an optical fiber sensing head, a reflector and a photoelectric detector. Proceeding from installation and debugging of the optical fiber current detection sensing module, the optical fiber current sensor on-site verification apparatus has reasonable control steps, is easy to operate, and can carry out efficient, economic and accurate error detection and quantity transmission on a DC heavy current sensor working on site for a long time; the optical fiber current sensor on-site verification apparatus is suitable for detecting and verifying a current detection sensor working on site for a long time in fields of electrolytic aluminum, electrolytic copper, electric smelting, electroplate and other electrochemical engineering; the on-site verification apparatus for the optical fiber current sensor is good in safety performance, large in measuring dynamic scope, high in frequency response degree, small in size and light in weight; and by adopting the on-site verification apparatus for the optical fiber current sensor, the measuring precision of a current detection apparatus can be raised, and needs of safety and stabilization of a power supply system are met.
Owner:XUNDI SCI & TECH HUBEI PROV
Plate-like polycrystalline particle
InactiveUS20090239041A1High degree of crystalline orientationFacilitated DiffusionPiezoelectric/electrostrictive device material selectionGlass/slag layered productsInorganic particleInorganic particles
A plate-like polycrystalline particle is produced by forming inorganic particles into a freestanding shaped body, firing the shaped body, and crushing and classifying the fired shaped body. The inorganic particles contain as the main component an oxide that has a general formula of ABO3 and that satisfies a×Pb(M1 / 3,Nb2 / 3)O3+b×PbTiO3+c×PbZrO3+z×MO (wherein a+b+c=1, and M denotes at least one element selected from Mg, Ni, and Zn), wherein z is in the range of 0.002≦z≦0.42. The oxide contains a predetermined excessive amount of MO (M denotes at least one element selected from Mg, Ni, and Zn) such that the plate-like polycrystalline particle contains an excessive amount of MO. The plate-like polycrystalline particle contains a plurality of crystal grains that have a wavy structure composed of wavy grain boundaries. The plate-like polycrystalline particle is easily crushed at the grain boundaries and has a high degree of orientation.
Owner:NGK INSULATORS LTD
Preparation method of hard closed-cell polyimide foam
The invention relates to a preparation method of hard closed-cell polyimide foam and belongs to the field of a preparation technology of a polymer polyimide foam material. The preparation method of the invention comprises the following steps: adding aromatic dianhydride into a polar solvent, and esterfying by adding an excessive amount of micromolecular fatty alcohol to obtain a solution A; addingdiamine, a foam stabilizer and an end-capping reagent into the solution A, reacting for 0.5-3 h to obtain a solution B, drying the solution B to remove the polar solvent, and crushing to obtain a precursor powder; placing the precursor powder into an open vessel and putting the open vessel with the precursor powder into a pressure vessel, vacuum-pumping to remove air and introducing CO2, heating,pressurizing, and finally cooling naturally and releasing pressure to obtain crosslinked polyimide foam. According to the method, nontoxic, odorless, non-combustible and cheap CO2 which is easily available is used as foaming gas. The preparation method is novel and has a wide application system.
Owner:AEROSPACE RES INST OF MATERIAL & PROCESSING TECH +2
Laparoscopic retractor devices
ActiveUS20150223795A1Readily adjustable in sizeReduce recovery time and patient discomfort and treatment costSurgeryMedical procedureMedical treatment
Devices for performing medical procedures such as laparoscopic surgery are provided herein. For example, this document provides laparoscopic retractor devices. In some embodiments, the laparoscopic retractor devices provided herein include two retractor blades that can be expanded or contracted. Further, in some embodiments an elastic covering is included, and the retractor blades are disposed within the elastic covering.
Owner:MAYO FOUND FOR MEDICAL EDUCATION & RES
Miter cutting machine
ActiveCN103008763AReduce the burden onShorten the timeTube shearing machinesShearing machine accessoriesDrive motorRotating disc
The invention discloses a miter cutting machine, which comprises a frame for fixing a workpiece and a cutting device for cutting the workpiece, wherein a horizontal rotating disc and a driving motor for driving the horizontal rotating disc are arranged on the frame; and a plurality of jigs are arranged on the edge of the horizontal rotating disc in the circumferential direction. Compared with the prior art, the miter cutting machine has the advantages as follows: the jigs are mounted on the horizontal rotating disc, so that a plurality of workpieces can be fed at a time, and continuous conveying and cutting are realized; the workpieces are pressed tightly by a downward pressing device, clamped by the jigs and a lug boss and automatically discharged by a discharging device, and operators only need to feed the workpieces, so that the degree of automatic production of the miter cutting machine is increased, and the production efficiency is improved; the miter cutting machine can be adjusted in height, thereby meeting the requirements of products with different sizes; the miter cutting machine can perform precise cutting, so that the cut of an obtained product is smooth in cut and no burr exists at the periphery of the cut; and the miter cutting machine is convenient for size adjustment of the product.
Owner:ZHEJIANG AXILONE SHUNHUA ALUMINUM IND
Bracket and hook assembly
InactiveUS20130240697A1Easily shipFacilitate adjustment of sizeCandle holdersLighting support devicesEngineeringMechanical engineering
An assembly 1 for temporarily mounting articles to a wall has a first section 2, a second section 3, a third section 4, and a hook section 5. By using threaded pin and slot type connections and locking nuts, one or more of the sections may be adjustably locked to the other. This facilitates adjustment of the width that may be accommodated of a wall or structure.
Owner:RUTIGLIANO CHRYSANTHE MARIE
Adjustable ring
InactiveUS20140053604A1Easy to adjustEasy size adjustmentFinger-ringsEngineeringMechanical engineering
An adjustable ring includes an outer surface and an inner surface defining an opening for receiving a finger therethrough; a flexible interior component encased by a soft and pliable exterior layer, allowing movement and adjustment of the ring between a flat position to a plurality of variable sized circular positions and vice versa, such that it allows for the circumferential adjustment of the ring as required to accommodate the diameter of the different sized fingers of the wearer.
Owner:NEWTON DAVID KEIR +1
Technique for producing bulbs
Comparing with technique for fabricating bulbs, the invention improves on following procedures: structure of sealing flame in use for technique of laying off exhaust pipe in stem and sealing step; adjusting arrangement of flame; rearranging vacuum system in use for exhaust process; technique of soldering tin in baking and assembling processes. Advantages are: increasing quality and acceptability of bulbs, prolonging service life of bulbs and lowering production cost.
Owner:安庆市荣光玻璃集团有限公司
Polyimide foam material and preparation method thereof
The invention provides a polyimide foam material and a preparation method thereof. The method includes the following steps that aromatic dianhydride is added into a polar solvent and heated to be dissolved, and then fatty alcohol is added; a catalyst, water and a foam stabilizer are added, and a transparent polyimide foam precursor solution is obtained and recorded as a solution A; the solution A and aromatic polyisocyanate are mixed in the mass ratio of 1:(0.3-2), a mixed solution is obtained, the mixed solution is put into a pressure vessel, the pressure is rapidly supplemented to set pressure with gas, foaming is carried out under the set pressure, and after foaming is finished, non-imidized foam is obtained; the non-imidized foam is subjected to heat treatment to remove the solvent, the foam with the solvent removed is heated for imidization treatment, and the polyimide foam material is obtained. According to method, the density of the polyimide foam material can be regulated by regulating the pressure, and thus the polyimide foam material with the varying density can be easily obtained through the method.
Owner:BEIJING RADIATION APPL RES CENT
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