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1024results about How to "Reduce the chance of breakage" patented technology

Heat-dissipating double-sided adhesive tape with ultrahigh heat conductivity coefficient

The invention discloses a heat-dissipating double-sided adhesive tape with an ultrahigh heat conductivity coefficient. Ethylene glycol or triethylamine is added into a polyamic acid solution, the resulting mixture is put in an oven in a vacuum environment and maintained at 100 DEG C for 0.9-1.1 hours, the temperature is raised to 300 DEG C and maintained for 0.9-1.1 hours, followed by natural cooling, to produce a polyimide film; the polyimide film is heated up to 250 DEG C from room temperature and then heated up to 500 DEG C, and further heated up to 1200 DEG C at a rate of 9-11 DEG C/min, to produce a prefired carbonized film; the prefired carbonized film obtained in the step 4 is rolled by a calendar; the rolled product is heated up to 2400 DEG C at a rate of 19-21 DEG C/min and maintained for 0.9-1.1 hours and then heated up to 2900 DEG C at a rate of 19-21 DEG C/min and maintained for 1.8-2.2 hours, followed by cooling, to produce a fired graphite film; and subsequently the graphite film is rolled to obtain a graphite coating. The heat transfer performance of the double-sided adhesive tape in both the vertical and the horizontal directions are improved, so as to prevent local overheat of the adhesive tape and ensure uniformity of heat transfer performance of the adhesive tape.
Owner:SUZHOU SIDIKE NEW MATERIALS SCI & TECH

Extensible settlement and incline measuring pipe for measuring settlement and horizontal displacement and mounting method thereof

An extensible settlement and incline measuring pipe for measuring settlement and horizontal displacement is composed of a settlement measuring pipe, an incline measuring pipe, a bottom cover and a joint pipe and is characterized in that the joint pipe is an freely-extensible connection sleeve pipe which is composed of two secondary pipes and a main pipe, the external walls of the two secondary pipes are provided with sliding grooves, and fixing pins arranged on the internal wall of the main pipe are snapped with the sliding grooves of the secondary pipes; and both ends of each secondary pipe are respectively connected with the screws of the settlement measuring pipe and the incline measuring pipe through locating pins. The extensible settlement and inline measuring pipe for measuring the settlement and the horizontal displacement can guarantee the settlement measuring pipe and the inline measuring pipe not to be deformed along with a large-displacement deformation of a soil body, thereby reducing the interaction force between the settlement measuring pipe of the inline measuring pipe and the surrounding soil body and reducing the probability of pipe blocking or pipe breaking; sediment and water can be effectively prevented from entering among every parts; and the freely-extensible joint pipe, the settlement measuring pipe and the incline measuring pipe can be mounted through direct screwing. Therefore, the extensible settlement and inline measuring pipe for measuring the settlement and the horizontal displacement is convenient to build in and mount, has low technical requirements for mounting personnel, can largely reduce the mounting time, and is easy to process and achieve.
Owner:NANJING HYDRAULIC RES INST +1

Method for preparing transmission electron microscope sample of soft brittle phototransistor

The invention belongs to the technical field of the preparation of transmission electron microscope samples of soft brittle phototransistors, and relates to a method for preparing a transmission electron microscope sample of a soft brittle phototransistor, in particular to a method for preparing a transmission electron microscope sample of a soft brittle photo semiconducting transistor. The method is characterized in that a hard brittle semiconductor with micro Vickers hardness of over 8 GPa is used as a protective layer of the soft brittle phototransistor, wherein the roughness Ra of the ultra-smooth surface of the protective layer is below 1 nanometer, and the thickness is below 650 micrometers; sand paper of 120 to 800 meshes is adopted in the coarse grinding stage, and a membrane is ground by adopting diamond of between 0.1 and 30 micrometers in the accurate grinding stage; the protective layer is bonded with the sample by adopting a hot setting adhesive which is insoluble in an organic solvent, and a first surface of the ground transmission electron microscope sample is bonded with a substrate by adopting a hot setting adhesive which is soluble in the organic solvent; and in the final stage of accurate grinding, the transmission sample and a thin area of the protective layer are obtained by a stress-free grinding method. The method has the advantages that the preparation of the transmission electron microscope sample of the soft brittle phototransistor is realized, and high-resolution transmission electron microscope atomic images are obtained.
Owner:DALIAN UNIV OF TECH

Clutch cap forming process and forming equipment thereof

The invention discloses a clutch cap forming process. The clutch cap forming process is characterized by including the following steps of (a) blanking, (b) pressing a middle boss, (c) bending four rotating lugs, (d) angle R shaping of two corresponding rotating lugs, (e) angle R shaping of the other two rotating lugs, (f) shaping flatness, and (g) punching. The invention further discloses clutch cap forming equipment which comprises a blanking die, a stretching die, a bending die, a first shaping die, a second shaping die and a punching die. According to the clutch cap forming process and the forming equipment thereof, the mode that pulling is carried out first and then folding is carried out is adopted, the thickness of a clutch can reach 6.35 mm, and the obtained bearing force of the clutch can reach 100000 newtons; meanwhile, a bending mode with an angle R is adopted, the probability that materials break during bending is reduced, and the bending success rate reaches 99.3%; angle R shaping of the rotating lugs is carried out twice, the angle R is eliminated, an assembling hole is convenient to form, and the best shaping effect is achieved; a flatness shaping procedure is arranged, accuracy of the formed hole is guaranteed, and meanwhile, a cap of the clutch and the clutch are accurately assembled.
Owner:RAINBOW METAL TECH

Flexible composite tube and manufacturing method thereof

The invention discloses a flexible composite tube and a manufacturing method thereof, and belongs to the technical field of pipelines. The flexible composite tube comprises an inner layer tube, a reinforcing layer and an outer layer tube. The inner layer tube is made of polyvinylidene difluoride, polyethylene, polyethylene stem grafting difluoro maleic anhydride, ethylene-propylene polymer and antioxygen. The reinforcing layer is made of long-fiber reinforced resin matrix prepreg tapes. The outer layer tube is made of polyethylene or polypropylene. The manufacturing method for the flexible composite tube comprises the step of manufacturing the inner layer tube, the step of manufacturing the reinforcing layer and the step of manufacturing the outer layer tube. The inner layer tube made of the polyvinylidene difluoride, the polyethylene, the polyethylene stem grafting difluoro maleic anhydride, the ethylene-propylene polymer and the antioxygen is adopted, so that the flexible composite tube has a good high-temperature resistant property, a good barrier property and a good anti-swelling property. The creep deformation of the inner layer tube can be effectively avoided, the long-fiber reinforced resin matrix prepreg tapes adopted in the reinforcing layer have a good binding capability with the inner layer tube, and the layering of a pipeline can be effectively avoided. Meanwhile, the flexible composite tube has the advantages of being simple in structure, low in cost, simple in manufacturing method and the like, and has wide application prospects.
Owner:BC P INC CHINA NAT PETROLEUM CORP +1

Preparing method for ball-like metal magnetically soft alloy powder

The invention relates to a preparing method for ball-like metal magnetically soft alloy powder, and belongs to the technical field of powder preparing. The method comprises the steps that raw materials of a metal magnetically soft alloy are weighed and mixed according to the weight ratio, intermediate-frequency induction smelting is adopted, and the molten alloy is prepared into an alloy casting strip through a thin-strip continuous casting technology; the alloy casting strip is placed into a crushing device, and the alloy casting strip is crushed into particle powder under the inert gas shielding condition; the crushed powder is placed into a shaping treatment device to be shaped, ball-like powder with the regular shape is obtained, the powder is subjected to annealing heat treatment, and fine powder is prepared through screening and collecting. According to the method, the uniformity of alloy powder components can be obviously improved, meanwhile, the powder wrapping insulating and pressing forming are facilitated through the prepared ball-like single-crystal particle powder, the uniformity degree of a soft magnetism powder core pressing insulating layer and the mechanical strength obtained after pressing forming can be obviously improved, the probability of damage of the insulating layer in the powder pressing forming process is greatly reduced, and accordingly the application field of the soft magnetism powder core is greatly enlarged.
Owner:有研增材技术有限公司

Hollow fiber curtain type film assembly

The invention discloses a hollow fiber curtain-type membrane component, which comprises a hollow fiber membrane bundle composed of a plurality of hollow fibrous membrane threads, the end head(s) at one end or the both ends of the hollow fiber membrane bundle, an air inlet pipe and a water producing pipe. The end presents a strip shape, an air distribution device with an air distribution hole is arranged at least one end, the air distribution device is communicated with the air inlet pipe, and the hole opening of the air distribution hole is opened towards the top part of the hollow membrane fiber; the end head(s) at one end or the both ends of the hollow fiber membrane bundle refers that the end head(s) is (are) provided at one end or the both ends of the hollow fiber membrane bundle. The invention also discloses a membrane bioreactor utilizing the hollow fiber membrane component and water treatment equipment. The hollow fiber membrane component disclosed by the invention has the structural characteristics that the anti pollution performance of the hollow fiber membrane component is enhanced, particularly the anti pollution performance of the root of the hollow fiber membrane is enhanced, the effective filtering areas of the hollow fibrous membrane threads are ensured, the service life of the hollow fiber membrane component is prolonged, and the processing, the assembly, the installation and the reparation of the hollow fiber membrane component are very convenient.
Owner:BEIJING ECOJOY WATER TECH

Mobile phone cover glass main printing technology

The invention relates to the technical field of mobile phone cover glass printing, in particular to a mobile phone cover glass main printing technology. The mobile phone cover glass main printing technology comprises the steps of (1) primary mirror-like silver printing, wherein a mirror-like silver layer is printed on the lower surface of clear glass in a blade coating mode by means of the screen printing technique; (2) secondary bluish violet printing, wherein a second bluish violet layer is printed on the lower surface of the clear glass in a blade coating mode by means of the screen printing technique; (3) tertiary pearl white printing, wherein a pearl white layer is printed on the lower surface of the clear glass in a blade coating mode by means of the screen printing technique. According to the mobile phone cover glass main printing technology, by means of the composite printing technology conducted on the clear glass and combining the primary mirror-like silver printing, the secondary bluish violet printing and the tertiary pearl white printing, printed patterns are stereoscopic, and natural transition is achieved between different ink layers. The mobile phone cover glass main printing technology has the advantages that operation is simple and convenient to control, quality is stable, production efficiency is high, and large-scale industrial production can be achieved.
Owner:广东星弛光电科技有限公司

Multi-bushing plate merging wiredrawing technology and multi-bushing plate wiredrawing device employing it

ActiveCN102515504ASimplify temperature controlReduce manufacturing costGlass making apparatusGlass fiberEngineering
The invention provides a multi-bushing plate merging wiredrawing technology. Specifically, 2 or more bushing plates are employed, and each bushing plate is provided with a plurality of leaks. Molten glass flows through each leak of each bushing plate and is cooled, and then a plurality of glass fibers can be obtained through wiredrawing molding respectively. Pulled by a wiredrawing machine driven wire cylinder, the glass fibers respectively pass through multiple upper bunchers and are neatened and gathered into glass fiber bundles, which are then neatened and gathered by a gathering buncher into a complete glass fiber bundle that is then wound on the wire cylinder into a finished glass fiber bundle. A multi-bushing plate wiredrawing device is provided with 2 or more bushing plates, each of which is equipped with a plurality of leaks. An upper buncher is installed behind each bushing plate respectively, a gathering buncher is arranged behind each upper buncher, the wiredrawing machine is disposed behind the gathering buncher, the wire cylinder is positioned on the gathering buncher, and the wire cylinder and the wiredrawing machine are in driving rotary connection. With the technology and device provided in the invention, the manufacturing cost of a bushing plate for a glass fiber bundle with a great weight of per unit length can be reduced, the band forming property of the glass fiber bundle can be improved, and the effect can be obvious.
Owner:CHONGQING POLYCOMP INT

Ceramic shell structure member and preparation method thereof, and mobile phone

Embodiments in the invention provide a ceramic shell structure member, comprising a ceramic shell and a frame equipped with a recessed part, wherein the ceramic shell comprises a ceramic flat plate and a ceramic protruding member outwardly protruding from the side surface of the ceramic flat plate, the ceramic protruding member is arranged in the recessed part of the frame so as to allow the ceramic shell to be compactly jointed with the frame, the upper surface of the joint of the frame and the ceramic protruding member is aligned with the upper surface of the ceramic flat plate along the thickness direction of the ceramic flat plate, and the frame covers the side surfaces of the ceramic shell or the side and bottom surfaces of the ceramic shell and is made of an alloy, a metal-based composite or plastic. According to the invention, the frame can protect the edges of the ceramic shell from direct collision with other objects, the ceramic protruding member can increase the bonding force between the ceramic shell and the frame, so the integral anti-breaking capability of the ceramic shell structure member is improved and the application scope of the ceramic shell structure member is broadened. The embodiments in the invention further provide a preparation method for the ceramic shell structure member and a mobile phone. The mobile phone comprises the ceramic shell structure member.
Owner:HUAWEI TECH CO LTD

Method for manufacturing electric plating diamond burr

The invention provides a method for manufacturing a plated diamond needle, which takes nickel-titanium alloy as a substrate of the needle, and comprises the following steps: firstly, the nickel-titanium alloy substrate of the needle is processed; secondly, the nickel-titanium alloy substrate of the needle and diamond particles are subjected to electroplating pre-treatment; thirdly, a composite diamond clad layer is coated on the head of the needle by means of direct-current electroplating; and fourthly, the diamond needle prepared is subjected to vacuum heat-treatment after electroplating. The method has the advantages that: firstly, the nickel-titanium alloy substrate of the needle has strong impact resistance, and the fracture probability of the substrate of the needle under the actuation of impulsive load is reduced, so that the fracture accident of the substrate of the needle can be effectively prevented; and secondly, due to adoption of the nickel-titanium alloy substrate of the needle and the heat-treatment technology after electroplating, a diffused layer is formed on an interface between the nickel-titanium alloy substrate of the needle and a metallic nickel clad layer, and metallic nickel in the clad layer and titanium in the nickel-titanium alloy substrate of the needle form intermetallic compounds, so that the bonding force of the clad layer is greatly reinforced, and the service life of the diamond needle is further improved.
Owner:HARBIN ENG UNIV

Heat-conducting ring band with scale-like fins and composite heat dissipating device with heat-conducting ring band

The invention relates to a heat-conducting ring band with scale-like fins and a composite heat dissipating device with the heat-conducting ring band. The heat-conducting ring band is used for reinforcing the heat dissipating ability of a heat generating device to the external environment. The heat-conducting ring band comprises a heat-conducting ring band base body wrapping the heat generating device. The heat-conducting ring band base body is provided with the multiple scale-like fins stamped in an integrally-formed mode. The composite heat dissipating device comprises the heat-conducting ring band wrapping a cell monomer, and a housing box arranged outside the heat-conducting ring in a sleeving mode. The portion between the housing box and the heat-conducting ring band is filled with a phase-change material, so that a heat conducting channel of the cell monomer, the heat-conducting ring band, the fins and the phase-change material is formed. Compared with the prior art, the heat-conducting ring band has the advantages of being excellent in heat transfer reinforcing effect, good in impact buffering effect, low in weight, small in size and low in cost, few materials are used, and the heat dissipating performance of the composite heat dissipating device is excellent.
Owner:SHANGHAI UNIV OF ENG SCI
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