58 results about "Flame polishing" patented technology

Method of making a mask assembly by providing a heat resistance mask substrate having an exposed surface with a surface smoothness less than 2000 micro inches, uniformly spraying a thermoset epoxy organic coating onto such exposed surface in one or more layers to provide a coating having (e.g., a thickness equal to or less than about 0.005 inches), a smoothness characterized by an average profilometer reading (Ra) of no greater than 1.5 micrometers, said coating being devoid of pores that exceed about 0003 inch in size, and flame polishing all or a portion of such coating to effect a surface finish of about 1.0 micrometers. A mask assembly which is useful in masking areas from thermal spray particles, comprising a heat resistance substrate presenting an exposed grit blasted surface having a smoothness of less than 2000, and a thin thermoset epoxy coating bonded to said exposed surface and having a surface smoothness characterized by an average profilometer reading (Ra) no greater than 1.5.

The invention provides a preparation method for an optical fiber preform. The preparation method is characterized by comprising the steps of preparing a cladding and a fiber core, and specifically comprises the steps that (1) raw materials of the cladding and raw materials of the fiber core are prepared; (2) the raw materials of the cladding and the fiber core are ground in an agate mortar and areeach put into a corundum crucible with a cover, after melting is carried out in an electric furnace, cladding molten glass is poured into a preheated copper film, and protective gas is introduced into a hollow glass tube; (3) fiber core molten glass is poured into the glass tube of the cladding, and pouring is carried out so as to form an optical fiber preform body; (4) the poured optical fiber preform together with a mold is clamped and drawn into the electric furnace for annealing treatment, and after annealing treatment is finished, natural cooling is carried out to reach room temperature;and (5) the optical fiber preform body is taken out for flame polishing, then mixed hydrofluoric acid and nitric acid are added for acid pickling, washing is repeatedly carried out with deionized water, and drying is carried out so as to obtain the processed optical fiber preform. According to the preparation method, fiber breaking is not liable to occur for an optical fiber drawing tower wire after the wire drawing process, and the fiber breaking rate in the disc dividing process is relatively low.

A scaffold strut is shaped to improve hemocompatibility. After laser cutting, the scaffold is placed on a work piece and its struts are shaped by flame polishing or brushing. The abluminal surfaces and luminal surfaces can have corners rounded. The strut can have a sloped surface on its luminal side without reducing strut thickness needed for strength.

A method for manufacturing an optical fiber preform includes a process A of applying flame polishing to a center glass rod, a process B of determining a ratio ra / rb, which is a ratio of a radius ra of the center glass rod expressed in millimeters with respect to a radius rb of a target optical fiber preform expressed in millimeters, based on a refractive index profile of a target optical fiber preform, and a process C of determining an amount of fine glass particles to be deposited on the center glass rod so that a ratio ra / rb / c falls within a range from 0.002 to 0.01, where 'c' is a maximum value of hydroxyl group concentration expressed in ppm in the vicinity of a boundary between the center glass rod and an outer layer, which is formed by depositing fine glass particles on the center rod and by being vitrified.

The invention relates to an automatic polishing machine with a quartz furnace tube. The polishing machine is provided with the quartz furnace tube, a machine table, a first guide rail, a second guiderail, an internal flame gun rack, an external flame gun rack and a rotary table, wherein the machine table is the base of the whole polishing machine; the first guide rail is installed on the upper surface of the machine table; the second guide rail is installed on the side surface of the machine table; the internal flame gun rack is used for installing an internal flame gun installed on the firstguide rail through a sliding block and positioned on the axis of the quartz furnace tube, so that the internal flame gun can move along the first guide rail to carry out flame polishing on the innersurface of the quartz furnace tube; the external flame gun rack is used for installing an external flame gun, and the external flame gun rack is installed on the second guide rail through the slidingblock, so that the external flame gun can move along the second guide rail to carry out flame polishing on the outer surface of the quartz furnace tube; the quartz furnace tube is clamped by the fixture of the rotary table, and meanwhile, the quartz furnace tube performs axial rotary motion under the drive of a rotary table motor.

A method for producing a single-mode fiber for submarine cables including washing and flame polishing of a preform, fiber drawing, coating with a first coating layer and curing therein using an UV-curing device, coating with a second coating layer and curing therein using the UV-curing device, fiber selection with a 2% screening strain, and testing the properties of the fiber. The fiber has a high strength and long coiling length exceeding 100 km and the method is easy to practice with low production cost and parameters involved therein are highly controllable.

The invention relates to glass cup production equipment, in particular to a flame polisher for polishing the outer surface of a glass cup and a use method of the flame polisher. The flame polisher comprises a polishing flame gun for polishing the glass cup, wherein the polishing flame gun is connected with a moving mechanism used for controlling movement of the polishing flame gun. The flame polishing equipment for glass cup production is provided, polishing operation of the glass cup is more intelligent through combination of mechanical components, and injury of conventional manual polishingto workers is also reduced.

The invention relates to the field of package manufacturing of wine bottles and provides a method for preparing a crystalline wine bottle cap. The method provided by the invention comprises the stepsof batching, melting, pressing, flame polishing, annealer annealing, aftertreatment and the like. The crystalline wine bottle cap disclosed by the invention has the crystal clear sense of crystals, isattractive and generous in appearance and is very helpful to improving the grade of wine product packages. According to the crystalline bottle cap disclosed by the invention, the adopted crystallinematerial has very high transparency, refractive index and strength, so that the collection and ornamental values of wine products are increased sharply.

The invention belongs to the technical field of glass bottle processing, and discloses a glass bottle capable of resisting 1300 DEG C and being not deformed during high temperature flame polishing, wherein the glass bottle comprises: Al2O3, SiO2, BaO, Fe2O3, La2O3, MnO, Sb2O3, TiO2, ZnO, B2O3, As2O3, CaO, K2O, MgO, Na2O, SrO, Y2O3 and ZrO2. According to the present invention, when the temperaturereaches about 700-800 DEG C, the surface of the glass bottle is subjected to treatment and flame polishing, such that the heat treatment effect is good due to the soft exterior and the hard interior at this time, and the condition of incapability of being processed due to easy softening of the original glass bottle can be avoided.

The invention relates to a quartz glass porous enzyme label plate manufacturing method and a quartz glass enzyme label plate prepared through the method. The preparation method comprises: preparing aquartz glass plate; cutting, and drilling holes; carrying out fine grinding; soaking with a 10-20% hydrofluoric acid solution, washing with water until achieving a neutral state, and drying; carryingout flame polishing; and annealing to remove stress until the quartz glass enzyme label plate is stress-free. According to the present invention, the prepared quartz glass enzyme label plate has advantages of high hardness, good chemical stability, repeated assembly use, energy saving and environmental protection, and is not limited by various conditions.

The invention relates to the technical field of glass processing, and especially relates to a glass container fire polishing machine, which solves technical problems in prior arts such as unreasonable design. The fire polishing machine comprises a frame, and a glass container conveyer belt arranged above the frame. The fire polishing machine is characterized in that: plural sets of fire polishing mechanism are arranged on the frame, wherein the fire polishing mechanisms are orderly arranged along the conveyer belt; each fire polishing mechanism is connected to the frame through an adjustable movable mechanism; the fire polishing mechanisms can move along the conveyer belt with the driving of the adjustable movable mechanism; while moving along the conveyer belt, the fire polishing mechanisms can be elevated in a vertical direction with the adjustable movable mechanism. Compared to prior arts, the glass container fire polishing machine has advantages of reasonable design, simple structure, high heat treatment temperature, and high speed. Meanwhile, flaws appeared during glass bottle production processes can also be solved by the machine. The processed glass containers have good surface fineness, no dust, and basically no pollution.

An optical fiber base material machining method for forming spindle-shaped portions at ends of the optical fiber base material by severing the optical fiber base material after reducing an outer diameter of the optical fiber base material to a predetermined target outer diameter at a predetermined machining position, comprising: reducing the outer diameter to a predetermined intermediate outer diameter between the outer diameter before the machining and the target outer diameter at the machining position; flame polishing a surface of the optical fiber base material in a region including the machining position; and further reducing the outer diameter of the optical fiber base material.

The invention relates to a preparation method of silica optical fiber, in particular to a preparation method of high-strength silica optical fiber, which is used to solve the disadvantage that the strength of the existing silica optical fiber cannot meet the requirements of special application occasions. The preparation method of the high-strength silica optical fiber comprises the following steps: firstly, mechanically polishing a quartz preform with a diameter of 20-35 mm, the roughness after polishing is 6-8 μm, and then performing flame polishing, and the roughness after polishing is 4-6 μm , and then gradually reduce the heating temperature by gradually reducing the flow rate of hydrogen in the oxyhydrogen flame. After stopping the heating, let the quartz preform stand at room temperature, pickle the quartz preform and then draw it. The drawing speed is 3-10m / min , while annealing the bare optical fiber output from the exit of the drawing furnace, the length of the annealing section is 600mm, the annealing temperature is 300-500°C, and finally the bare optical fiber is coated.