113results about How to "Process parameter control" patented technology

The invention discloses a new method for surface boriding of hard alloy, which sequentially comprises the following steps of: removing an oxidation layer on the surface of the hard alloy; embedding the hard alloy into a solid boriding agent, putting the mixture into a nearly-closed boriding container, and putting the container into an induction heating furnace; vacuumizing the furnace, stopping vacuumizing until the vacuity is over 100 Pa, and filling inert gas or hydrogen; after the gas in the furnace reach the pressure, starting to perform induction heating to reach the boriding temperature of between 800 and 1,300 DEG C, and performing heat preservation for 0.5 to 8 hours to realize gas-solid phase boriding. The solid boriding agent comprises the following components in percentage by weight: 5 to 50 percent of boron supply agent, 2 to 40 percent of activating agent and the balance of fillers, wherein the boron supply agent is one or more of powdered B4C, BN and amorphous boron; the activating agent is two or more of powdered KBF4, NaBF4, NH4BF4, (NH4)2CO3, rare earth oxide and Mg powder, and one of the mixture is an activating agent containing a B element; and the filler consists of graphite powder granules and SiC powder or Al2O3 powder. Through the method, the boriding thickness of sintered hard alloy blank is more than 0.1 millimeter and is close to 1 millimeter, so the surface abrasion resistance of the hard alloy is improved greatly.

The invention discloses a push-bending forming process for a hollow blade. The process comprises producing a mould cavity curved surface according to a finished product hollow blade appearance curved surface; machining a mould according to the mould cavity curved surface and forming a mould cavity passage with two open sides in the mould; designing a chuck according to the blade tenon shape; fixing the chuck and the mould on a hot press; coating high-temperature lubricants on the inner surface of the mould cavity and the surface of a blade blank; mounting the blade blank on the chuck. The hot press acts, the mould is closed, the chuck drives the blade to move towards the mould to push the blade into the mould cavity from one end of the mould cavity passage, and the blade is forced to be bent under the action of the mould cavity inner surface and is subjected to torsional deformation; the mould is opened after the torsional deformation is kept for certain time, and the formed blade is dismounted. According to the process, slab hollow blade blanks can be formed into complex torsional forms and are provided with required torsion angles, the forming process is stable and convenient and fast, the speed is controllable, deformation distribution of all parts are uniform, and the production efficiency is high.

The invention discloses an antibacterial packaging film and a preparation method thereof. The antibacterial packaging film comprises chitosan as a main raw material and further comprises plant essential oil which is used as an antibacterial agent. By using a plant essential oil microcapsule formed by beta-cyclodextrin and plant essential oil as the antibacterial agent, the antibacterial packaging film not only can be used for improving the stability of essential oil, but also can be used for controlled release of the essential oil. In addition, the raw material chitosan is an environment-friendly macromolecular compound, so that the antibacterial packaging film has a good film-forming property and is excellent in antibacterial property.

This invention relates to a method to eliminate the silicon pad device process area original defection, which is used to eliminate the original defection of the silicon crystal surface. This method uses direct pull method to use silicon crystal pas as original silicon pad and injects the low dose ion of Ge#+[+] or Si#+[+] into the surface layer of the original silicon to make it non-crystal and then uses rapid heat annealing or oven annealing to make the silicon surface non-crystal layer.

The invention relates to a preparation method of a SiGe alloy thermoelectric material. The preparation method of the SiGe alloy thermoelectric material is characterized by comprising the following steps of: (1) weighing high-purity Si blocks, high-purity Ge blocks and dopants as raw materials according to a chemical formula Si80Ge20X0-3, wherein X in the chemical formula stands for elements of the dopants; mixing the high-purity Si blocks, the high-purity Ge blocks and the dopants, then melting for 2 to 3 times with 30s each time in an argon arc melting furnace to obtain an alloy block body; (2) grinding and crushing the alloy block body obtained in the step (1), then ball-milling for 1 to 2h in a ball mill by taking alcohol as a ball-milling process controlling agent, and drying to obtain alloy powder; and (3) carrying out electro-discharging plasma sintering on the alloy powder obtained in the step (2) to obtain compact and blocky SiGe alloy thermoelectric material. The invention has the advantages of simple process, short preparation time, easily-controlled process parameters and high performance of the prepared material.

Described herein is a chemostat-like continuous cell culture system that combines certain advantages of perfusion open systems and chemostat open systems to improve the culturing of mammalian cells, e.g., genetically modified cells, particularly in serum-free or chemically-defined media. The continuous culture system described herein involves culturing mammalian cells in a continuous cell culture system, which comprises a cell retention device, wherein the cell culture system has a dilution rate (D) of less than about 2 d−1, and a cell density of less than about 2×107 cell/mL. Also described herein is a method for producing a polypeptide and/or virus of interest in a continuous cell culture, the method comprising culturing mammalian cells expressing the polypeptide and/or virus of interest in a continuous cell culture system, which comprises a cell retention device, wherein the cell culture system has a dilution rate (D) of less than about 2 d−1, and a cell density of less than about 2×107 cell/mL; and recovering the polypeptide and/or virus of interest from medium of the cell culture system.

The invention discloses a preparation method of a nanocellulose antibacterial sustained-release film. The method comprises the following steps: firstly, weighing 100 parts of nanocellulose colloid, 0.08 part of TEMPO powder and 0.52 part of NaBr powder, and diluting the substances with distilled water until the solid content is 1 percent; adding 0.4 to 4 parts of NaClO solution, adjusting and keeping a pH value of the system to 10, adding absolute ethyl alcohol and enabling the reaction to be ended; then centrifugally washing to obtain nanocellulose oxide; secondly, taking the nanocellulose colloid and a nanocellulose oxide sustained-release control agent, mixing and diluting until the solid content is 1 percent to obtain mixed nanocellulose suspension; thirdly, preparing a nisin solutionwith the concentration of 1 percent, adding the solution into the mixed nanocellulose suspension, and carrying out magnetic stirring to obtain a film forming liquid; fourthly, pouring the film formingliquid into a die and drying to obtain the nanocellulose antibacterial sustained-release film. The antibacterial sustained-release film prepared by the preparation method disclosed by the invention has good mechanical properties and slow release function of an antibacterial agent and can effectively inhibit the growth of microorganisms.

The invention discloses a method for preparing high-strength boron carbide porous ceramics. The method comprises the following steps: (1) proportioning raw materials: 80-95wt% of boron carbide powder,0-3.0wt% of suspending agent, 3-15wt% of binder, 5-12wt% of sintering assistant and 0-12wt% of lubricant; (2) adding distilled water into the raw materials, and carrying out mixing in a ball mill orstirring mill, so as to obtain boron carbide slurry, wherein boron carbide granules 1# and boron carbide granules 2# in the boron carbide slurry are uniformly distributed and suspended; (3) subjectingthe boron carbide slurry to spraying granulation, and carrying out drying, so as to obtain boron carbide powder with fluidity; (4) molding the boron carbide powder, so as to obtain boron carbide biscuits; and (5) placing the boron carbide biscuits into a vacuum or atmosphere no-pressure sintering furnace. According to the method, the weak points that the quantity of sealed pores is large, a ceramic matrix is complicated in ingredient, the strength is low, and the like can be overcome, and boron carbide can have more extensive application.

A rubber material internal circulation drying machine relates to a rubber material drying machine. Aiming at the problem that the existing direct discharging rubber material drying machine has big heat consume and high maintain cost. The front and rear of a box (1) of the present invention are disposed with a feeding drive device (9) and a discharging drive device (10) connected by a material conveyer belt. The box (1) is divided into five drying chambers and one cooling chamber (8) by a frame (2). The fifth drying chamber (7) and the cooling chamber (8) are disposed with air inlets (25). The first drying chamber (3) is composed of a first front drying chamber (27) and a first rear drying chamber (28) which is disposed with air outlet (29). One side of the box (1) is mounted with a motor (17) and a blower (18). A heat exchanger (20) is disposed in the box (1). An upper temperature measuring device (21) and a lower temperature measuring device (22) are disposed on the upper side and lower side of the material conveyer belt. Compared with the existing technology, the present invention can save energy by 30%, and can reduce manufacturing cost by 35% compared with the same kinds of products, and is especially adapted to drying process for nitrile-butadiene rubber and styrene-butadiene rubber.

The invention provides a free alkalinity control system and application thereof, particularly a free alkalinity control system and a pretreatment method for coating a metal workpiece. The free alkalinity control system comprises a sampling device, a titration apparatus, a feeding device and a free alkalinity control device. The system can effectively control the alkalinity in the reactor.

The invention relates to a method for synthesizing GMA acrylic resin by microchannel reaction. The method adopts an improved process of solution polymerization. Through the microchannel reaction process, the problems of difficult guaranteeing of safety of a reaction device, easy explosive polymerization of products and poor stability of the product quality caused by unstable release of reaction heat in solution polymerization are solved through the microchannel reaction process. At the same time, the molecular weight distribution of the polymer is narrow, and the polymer material performance is better.

The invention discloses a manufacturing method of a titanium bronze alloy cast ingot. The titanium bronze alloy cast ingot is manufactured through vacuum melting and semi-continuous casting, and electromagnetic stirring operation is adopted for auxiliary production in the vacuum melting process and the semi-continuous casting process. In the vacuum melting process, the vacuum degree is controlledto range from 10<-3>Pa to 10Pa, and the vacuum melting temperature is controlled to range from 1100 DEG C to 1400 DEG C. In the semi-continuous casting process, the pull casting temperature is controlled to range from 1000 DEG C to 1200 DEG C, and the pull casting speed is controlled to range from 20mm/min to 120mm/min. According to the manufacturing method of the titanium bronze alloy cast ingot,by means of the optimized manufacturing technology, the macrosegregation tendency of titanium bronze alloy is controlled, the macrosegregation rate of the titanium bronze alloy cast ingot is controlled to be 8% or below, the dispersion coefficient of the vickers hardness of the cross section of a finished strip is smaller than or equal to 7%, the comprehensive performance of the titanium bronze alloy cast ingot is obviously improved, the production cost of the titanium bronze alloy cast ingot is reduced, and the good application prospect is provided for titanium bronze alloy products.

The invention belongs to the technical field of tin metallurgy, in particular relates to a novel method for roasting a tin-containing high-arsenic and high-sulfur material by fluidized rich oxygen. The method comprises the following steps of: mixing oxygen into a charged gas of a fluidized furnace; controlling the oxygen quantity to reach 22-45 wt% of the total charged gas; carrying out oxygen-enriched fluidized roasting on the material at 600-1000 DEG C; and adding the oxygen in such a way that the quantity of the charged air is gradually reduced and the oxygen quantity is gradually increased so that the total charged gas is invariable and the oxygen concentration satisfies the process parameters while a charging system is started for charging. According to the invention, the arsenic and sulfur removing rate can be effectively increased, the roasting quality can be improved, the smoke gas quantity generated by treatment of the unit material can be reduced, the heat loss can be reduced, the heat utilization rate can be increased, the furnace hearth capacity can be improved without increasing the area of the furnace hearth, the treatment quantity can be increased and the production efficiency can be enhanced; meanwhile, the concentration of SO2 in the smoke gas can be increased so that the problems of low SO2 concentration in the tail gas, unfavorable acid making and environment pollution can be solved to change the harm into the treasure in the tail gas acid making.

The invention provides a method and device of a serinus mozambicus mozambicus extract extraction technology. The method and device can achieve continuous and stable extraction of a serinus mozambicus mozambicus extract. The control method of the serinus mozambicus mozambicus extract extraction technology comprises the following steps of 1, extracting agent preparation control, wherein water saturation ethyl acetate is prepared inside a preparation tank to be adopted as an extracting agent; 2, extraction tower constant volume control, wherein a weighing sensor is arranged inside an extract storage tank, the total weight of the extract is worked out, and the extract is uniformly distributed into extraction columns of the extraction tower through a weight reduction method; 3, extraction control, wherein the extracting agent in the step 1 is added into the extraction tower, and when the addition amount of water saturation ethyl acetate added into the extraction tower reaches the total volume of the extraction tower, the extraction process is ended; 4, extracting agent temperature control, wherein the real-time temperature of the extracting agent inside the extraction tower is detected, and when the real-time temperature of the extracting agent inside the extraction tower is lower than a set value, the temperature of the extracting agent inside the preparation tank is regulated; 5, extraction tower liquid level control, wherein when the liquid level reaches the high level, an alarm is given or extraction is stopped.

The invention discloses an alarm system of an intelligent rotary disc type ultrasonic welding machine. The alarm system comprises a rotary disc type ultrasonic welding machine body, an ultrasonic welding machine monitor, a communication device, a cloud server, a workshop management terminal and an alarm device, wherein an intelligent mechanical arm is controlled by a control device of the ultrasonic welding machine body; the ultrasonic welding machine monitor is used for collecting voltage, current, air pressure, frequency, yield, welding time and the like; and the communication device is usedfor transmitting the data to the cloud server, the alarm device comprises a sound alarm device and an alarm display module, when the ultrasonic welding machine monitor judges that the running data exceeds a set normal operation threshold value, the ultrasonic welding machine monitor sends an alarm command to the alarm device, the sound alarm device sends an alarm sound, the alarm display module displays the alarm content, meanwhile, the control device controls the intelligent mechanical arm to clamp defective products to a defective product area of a discharging channel. According to the alarm system, the technological parameters in the running process can be monitored and the alarming function can be realized.

The invention discloses a drug coated balloon dilating catheter and a process thereof. The drug coated balloon dilating catheter comprises a drug coated balloon, an outer cavity tube, an inner cavitytube and a connector. The surface of the drug coated balloon is coated with a drug coating, a release drug in the drug coating is a sirolimus derivative BA9, and a carrier of the release drug is polyethylene oxide. A manufacturing process of the drug coated balloon dilating catheter includes steps of catheter assembly and drug coating. The drug coated balloon has advantages of short tissue absorption time, high drug absorption efficiency and high drug coated balloon release rate, and high tissue safety is realized. Compared with an existing taxol drug coated balloon, the drug coated balloon has advantages of promising application prospect.

A process for preparing superfine nematospherical Ni particles includes such steps as proportionally mixing carbonyl nickel vapor with CO gas, controlling the pressure of a decomposing reactor to 5-15 Kpa and its internal temp to be divided into 6 temp segments, filling said gas mixture in said decomposing reactor from its top, the carbonyl nickel dropping down while thermal decomposing to become superfine dendritic Ni particles (0.2-6 microns) and colliding between the Ni particles.

The invention provides a pH (Potential of Hydrogen) control system and an application thereof and particularly provides a pH control system. The pH control system comprises a sampling device, a pH detection device, a charging device and a pH control device, wherein the sampling device is used for extracting a sample in a reactor; the pH detection device is connected with the sampling device and is used for carrying out pH detection on the sample extracted by the sampling device, so as to determine a pH value of the sample; the charging device is connected with the reactor and is used for adding a feed liquid into the reactor; and the pH control device is respectively connected with the pH detection device and the charging device and used for turning on or off the charging device to add the feed liquid into the reactor on the basis of the pH value, obtained in the pH detection device, of the sample. The invention further provides a method for processing a metal work piece before coating by using the pH control system. By utilizing the pH control system, the pH value of a solution in the reactor can be effectively controlled.