39results about How to "Reduce bubble defects" patented technology

The invention provides a preparation method of a self-bonding and pre-decomposing glass batch. The method comprises the following steps of: pre-decomposing carbonate out of a kiln so as to obtain slaked lime and periclase, then mixing with other glass batch in a proper proportion in a mixing machinery, adding 8-20wt% of water during the mixing process, then pelletizing the mixed batch, standing for more than 72hours, and hardening by hydration to finally obtain the pelletized glass batch with a certain strength. According to the preparation method, the decomposing process of the carbonate is finished out of the kiln, thus the heat consumption can be greatly reduced; the lower limit of the grain size of the raw material is not required, and thus the resource can be used furthest; the cost of the raw material is reduced by adopting the light soda ash; and the pelletizing of the glass batch can be achieved without using an external bonding agent. Therefore, the preparation method has the advantages that the melting rate is improved, the melting temperature is reduced, the melting efficiency is high, and the like.

The invention provides liquid crystal substrate glass and a preparation method thereof. The liquid crystal substrate glass consists of the following oxides in percentages by mass: 60.0-65.0% of SiO2, 15.0-18.0% of Al2O3, 8.0-12.0% of B2O3, 6.0-8.0% of CaO, 0.5-2.0% of MgO, 0.5-3.0% of SrO, 0.25-1.30% of BaO, 0.05-0.15% of SnO2 and inevitable impurities. The preparation method comprises the following steps: uniformly mixing the raw materials; melting and clarifying the raw materials and then drawing the raw materials by overflowing to form the liquid crystal substrate glass. The environmentally friendly oxide SnO2 is used as a clarifying agent, alkali metal oxide is not added, and the purpose of eliminating air bubbles on the premise of not polluting the environment is achieved.

The present invention is related to a method for producing float plate glass, wherein: molten glass is produced by introducing a glass starting material into a melting tank; the molten glass is continuously supplied on the surface of a molten metal which is contained in a bath that is provided with bottom bricks and a bottom casing that covers the bottom bricks; and the molten glass is caused to flow along the surface of the molten metal in a predetermined direction, so that the molten glass is float-formed into a strip-shaped glass ribbon. In this method for producing float plate glass, the temperature fluctuation range of the outer surface of the bottom casing is controlled within 4 DEG C.

The invention discloses an aviation titanium alloy 3D printing enhancement process, which comprises the following steps: S1, outputting a to-be-laid powder raw material through a mixer, and flatly laying the to-be-laid powder raw material on a powder bed through a scraper strip and a powder leaking groove; S2, performing laser scanning on metal powder on the powder bed for the first time until thetemperature of the metal powder laid on the powder bed rises to a preset temperature; S3, planning a scanning path for a preheated metal powder layer according to a set scanning strategy, and performing laser scanning for the second time; S4, cooling and molding to obtain a solidified metal sheet; S5, performing laser scanning on the solidified metal sheet for the third time to obtain a semi-finished product; and S6, performing laser scanning on the surface of a metal cutting layer of a finished product for the fourth time, and then the aviation titanium alloy 3D printing enhancement processis completed. The process provided by the invention can reduce cracks and bubbles in the finished product, and the finished product is high in mechanical strength, dimensional precision and compactness and low in surface roughness Ra value.

The invention provides a vacuum film pasting apparatus. The vacuum film pasting apparatus comprises a vacuum cavity module, a film pressing module, a bearing module and a heating platform, wherein thefilm pressing module comprises a film pressing plate; and the bearing module comprises a bearing plate and a spring device. When the vacuum film pasting apparatus acts, the film pressing plate presses a film downwards to drive the bearing plate to move to the heating platform so as to heat the film sheet to enable jointing adhesive to be cured and laminated; after heating is completed, the film pressing plate moves upwards, and the spring device can release the spring potential energy pre-stored in lamination, and drives the bearing plate to move upwards to recover to the initial position. The invention also provides a vacuum film pasting method; and by virtue of the vacuum film pasting apparatus and method, lamination shortcoming caused by air bubbles between the film sheet and the to-be-pasted film part can be reduced, and the combination force between the film sheet and the to-be-pasted film part can be improved.

The invention relates to a method for forming a waterproof coating in a negative pressure environment, and belongs to the technical field of spraying equipment. The method comprises the following steps: step 1, stirring the coating, namely, stirring the coating in a storing tank; and step 2, coating under negative pressure, namely, starting a vacuum pump to create the negative pressure environment for a negative pressure space, and coating the coating on a test part through a spraying mechanism. According to the technical scheme, the method has the advantages that the coating is stored in the storing tank and is stirred all the time so as to ensure uniform mixing; the vacuum pump can provide the negative pressure state to the negative pressure space, so that the escape speed of bubbles in a coating layer on the surface of the test part is increased, and as a result, the deflect of bubbles in the coating can be reduced. The method is beneficial in technological effect and obvious in practical value.

The invention provides a high-viscosity polyimide (PI) coating and baking method, which has the advantages of low cost and low defect density. The method comprises the following steps in sequence: coating the surface of a wafer with a tackifier; performing first baking on the wafer coated with the tackifier; performing first cooling on the wafer which is subjected to first baking; coating the surface of the wafer which is subjected to first cooling with PI; performing second baking on the wafer coated with the PI; performing second cooling on the wafer which is subjected to second baking; and performing ultraviolet baking on the wafer which is subjected to second cooling, wherein a common heating mode for heating through a vacuum sucking disk and a deep ultraviolet lamp is adopted in the ultraviolet baking. According to the embodiment of the invention, the problem of generation of bubble defect due to high viscosity of PI glue is solved, the product yield is increased, and the imaging quality is enhanced.

The invention relates to an aluminum alloy die-casting improving method, in particular to a method which is suitable for solving blister generated in a die-casting piece. By adopting the following methods: mould temperature is controlled, injection speed is reduced, coating material with low gas evolution is selected, an overflow well is additionally arranged, pressure holding time and mould staying time are adjusted and smelting technology finishing is carried out, the generation of blister defect of the aluminum alloy die-casting piece is effectively improved.

The invention relates to the technical field of glass surface film coating, in particular to a curved surface glass film attaching process. The curved surface glass film attaching process comprises the following steps: 1, cutting explosion-proof film into the same shape as the glass to be attached, and attaching the edge of the cut explosion-proof film on the surface of the glass in alignment, wherein release film is not removed from the explosion-proof film at the moment; and 2, feeding the glass with the explosion-proof film prepared in the step 1 into a heating device for baking and heatingunder the heating temperature of 120 DEG C so as to enable the release film to be soft, gradually adhere to the surface of the glass and form a curve shape consistent with the curvature of the glass,and then attaching the explosion-proof film on the surface of the glass, heating, pressurizing and curing to accomplish attachment of the explosion-proof film. According to the process, the explosion-proof film and the glass can be perfectly attached, the yield is high, and batch production can be achieved.

The invention discloses a quartz thick-walled tube secondary moulding device. The quartz thick-walled tube secondary moulding device comprises a furnace body and a traction mechanism; the furnace bodycomprises a furnace shell, an upper end cover, a lower bottom plate, an induction heating coil, an upper induction heating member, a center pole, a lower thermal insulation member, and a moulding platform; a furnace chamber penetrating the furnace body is arranged in the furnace shell; the upper end cover and the lower bottom plate are arranged on the upper end and the lower end of the furnace shell respectively; the upper end cover is provided with a locating groove and a nitrogen gas hole; the lower bottom plate is provided with a feeding port and a nitrogen gas hole; the induction heatingcoil is arranged in the furnace shell; the upper induction heating member is a hollow cylindrical structure member, is arranged in the furnace chamber, and is suspended on the upper wall of the furnace shell; the center pole is arranged in the furnace chamber, and is located using the locating groove, and is provided with a through hole; the lower end of the upper induction heating member is connected with the moulding platform; the moulding platform is provided with a tapered throat; the lower end of the moulding platform is provided with the lower thermal insulation member. The invention also discloses a secondary moulding method using the quartz thick-walled tube secondary moulding device. The quartz thick-walled tube secondary moulding device is capable of realizing a second time of moulding of thick-walled tubes with a thickness higher than a tolerance, and saving raw materials effectively.

The invention discloses an epoxy resin composite material pouring mold. The pouring mold is a hollow cavity with a pouring opening, an air hole penetrates through one side of the hollow cavity, an air guide pipe penetrates through the air hole, and an air valve is connected with the air guide pipe to connect and disconnect the air guide pipe. The vacuum pump is connected with the air guide pipe so as to exhaust air from the hollow cavity.

The invention relates to the field of curtain wall glass, and discloses a curtain wall glass preparation process and curtain wall glass. The preparation process comprises the following steps: weighing silica sand, dolomite, borax, limestone, mica powder, zirconium dioxide, sodium carbonate, mirabilite, carbon powder and titanium dioxide coated and modified ferric oxide; mixing all the raw materials, and grinding into powder; melting, clarifying and homogenizing the powder at 1500-1550 DEG C, heating to 1860-1880 DEG C, stirring for 20-30 minutes, cooling to 1500-1550 DEG C, and stirring for 1.5-2.5 hours to obtain molten glass; feeding the molten glass into a tin bath for molding to obtain molded glass; and annealing the formed glass to obtain the curtain wall glass. According to the invention, while the curtain wall glass is ensured to have relatively high strength, the bubble defect in the curtain wall glass can be effectively reduced by adding the titanium dioxide coated and modified ferric oxide into the raw materials and carrying out heating treatment after clarification.

The invention belongs to the technical field of glass manufacturing, particularly discloses a glass clarifying device and method, and aims to solve the problem of how to ensure a clarifying effect under a low-temperature clarifying condition. According to the glass clarifying device, the inclined plane is arranged in the middle of the bottom surface of the clarifying tank, the front end of the inclined plane is connected with the front-section bottom surface through the overflow weir structure, and the rear end of the inclined plane is connected with the rear-section bottom surface through the flow guide structure. Therefore, under the overflow action of the overflow weir structure, the molten glass can be uniformly distributed on the inclined plane in the transverse direction when the molten glass is controlled to be shallow; meanwhile, the inclined plane can control the depth of the molten glass at the inclined plane to be very shallow, so that the overall temperature of the molten glass is rapidly increased, rapid growth and accelerated floating of bubbles are facilitated, and the bubbles can be rapidly eliminated at a lower clarification temperature under the same clarification capability; in addition, under the flow guide effect of the flow guide structure, the glass liquid on the inclined plane can be collected, so that the glass liquid is mixed up and down and the liquid level is kept stable.

The invention relates to the technical field of touch screen glass substrates, and discloses a high-strength touch screen glass substrate and a preparation method thereof. The touch screen glass substrate is prepared from the following components in parts by weight on the basis of oxides: 70 to 80 parts of SiO2, 14 to 18 parts of Al2O3, 13 to 16 parts of Na2O, 2 to 3 parts of K2O, 2.7 to 3.5 parts of CaO, 3.8 to 4.6 parts of MgO, 0.1 to 0.3 part of SnO2 and 0.05 to 0.1 part of ZrO2. By adopting the formula, the mechanical strength of the touch screen glass substrate can be effectively improved, and meanwhile, the bubble defect in the touch screen glass substrate is reduced.