379 results about "Glass forming" patented technology

The invention relates to the technical field of 3D glass, in particular to a 3D glass cover plate forming parameter optimization system and method based on dynamic temperature and pressure regulation, and the method comprises the steps: building a mathematical model which comprehensively considers the coupling effect of a temperature field, a stress field and a flow field, and processing a control equation set through a numerical discretization method, a discretization model of the glass forming process is obtained, and a discretization equation is solved; establishing a multi-target parameter optimization model by taking geometric accuracy and residual stress of the formed glass cover plate as optimization targets and taking mold temperature and pressure as optimization design variables; a dynamic temperature and pressure regulation and control strategy is designed, and an optimal mold temperature and pressure curve is obtained through searching by means of an intelligent optimization algorithm; the actual effect of the dynamic temperature and pressure regulation strategy is evaluated by measuring and statistically analyzing the geometric accuracy and residual stress of the formed glass cover plate. The method provides a new thought and method for high-quality and high-efficiency manufacturing of the 3D glass cover plate.

The invention provides a low-dielectric glass fiber composition as well as glass fibers, electronic cloth and a composite material thereof. The glass fiber composition comprises the following components in percentage by weight: 50.0 to 58.0 percent of SiO2, 10.0 to 16.9 percent of Al2O3, 19.0 to 27.3 percent of B2O3, 2.3 to 6.6 percent of CaO, 0.2 to 4.0 percent of MgO, 0.01 to 1.0 percent of SrO, 0.01 to 0.3 percent of Na2O, 0.01 to 0.45 percent of K2O, 0.01 to 0.5 percent of Fe2O3, 0.01 to 0.49 percent of TiO2, 0.01 to 1.7 percent of F2, 0 to 1.4 percent of ZrO2, 0.12 to 1.8 percent of F2 + K2O, 0.05 to 2.0 percent of F2 + SrO, 0.03 to 0.49 percent of Na2O + K2O, greater than or equal to 0.6 percent of K2O / Na2O, greater than or equal to 0.5 percent of F2 / K2O, 3.0 to 9.8 percent of CaO + MgO + SrO and 72.0 to 84.0 the range of C2 = (F2 + K2O) / Na2O is greater than or equal to 1.4, the range of C3 = (F2 + K2O) / (Na2O + TiO2) is greater than or equal to 0.5, the range of C4 = (MgO + SrO) / CaO is greater than or equal to 0.05, and the range of C5 = (SiO2 + B2O3) / (CaO + MgO + Al2O3 + TiO2) is greater than or equal to 3.0; and the glass fiber composition does not contain lithium oxide. The glass fiber composition has the characteristics of low dielectric, low loss and low density, can improve the glass modulus, reduce the glass forming temperature, devitrification temperature and rate, can also reduce the surface tension and clarification difficulty of molten glass, has more cost advantages, and is suitable for large-scale production of low-dielectric glass fibers.

The invention relates to microcrystalline glass, a preparation method, a microcrystalline glass product and electronic equipment, and belongs to the technical field of microcrystalline glass preparation, and the microcrystalline glass comprises the following components in percentage by mole of oxides: 30-55% of Al2O3; caO: 25%-55%; 8%-20% of alkaline earth metal oxide; 3%-15% of alkali metal oxide; 0%. 10% of B2O3; alkaline earth metal ions and alkali metal ions are added into a glass system composed of calcium and aluminum, so that the glass forming performance of the glass ceramic can be effectively improved under the condition that the high mechanical strength of the glass ceramic is kept, and the glass melting temperature and energy consumption are reduced.

The invention discloses an anti-slip duplicated raw stone ceramic tile and a preparation method thereof, and belongs to the technical field of ceramic tile preparation. The anti-slip re-carved raw stone ceramic tile comprises a green body base layer, a glaze layer and a modified wear-resistant layer, and the green body base layer is prepared from the following materials in parts by weight: 40-60 parts of kaolin, 20-35 parts of quartz sand, 15-20 parts of potassium feldspar, 5-10 parts of calcite, 1-2 parts of wollastonite and 1-4 parts of talc; the glaze layer material consists of 15-22 parts of a glass forming agent, 3.2-8 parts of a fluxing agent, 2-7.2 parts of an opacifier, 0.4-2 parts of a coloring agent, 2-3.6 parts of an anti-skid complexing agent and 0.8-4 parts of a suspending agent; the modified wear-resistant layer material is composed of 1.2-2.1 parts of a modified wear-resistant agent and 5-10 parts of epoxy resin. The ceramic tile prepared by the method has excellent skid resistance, antifouling property and wear resistance.

The invention discloses a glass toughening bending forming device, and relates to the technical field of glass forming. The device comprises a device body, a high-temperature chamber is arranged on the left side in the device body, a forming assembly is arranged in the device body and is in hydraulic transmission, a forming auxiliary assembly is arranged on the upper portion in the device body, and the bottom of the forming auxiliary assembly is in an arc shape; a preparation frame is fixedly installed on the left side of the device body, a fixing plate is fixedly installed on the left side of the preparation frame, a double-head motor is fixedly installed on the side, away from the center of the preparation frame, of the fixing plate, and an arc groove rod is fixedly installed at the output end of the side, close to the center of the preparation frame, of the double-head motor. The surface of the raw glass sheet is uniformly brushed by the brushing plate, so that flaws caused by deep sinking of particles on the surface of the raw glass sheet during subsequent heating are prevented, and the strength of a finished product is prevented from being reduced.

The invention discloses a thickness cooling air device for overflow method substrate glass forming and a using method thereof.The thickness cooling air device comprises two soaking box bodies and a cooling mechanism which are arranged at the bottom of an overflow brick, the soaking box bodies are located on the two sides of substrate glass correspondingly, and the cooling mechanism comprises a plurality of first cooling air pipes, a plurality of second cooling air pipes and a fixing assembly; the first cooling air pipe is arranged outside the soaking box body, and an air inlet of the first cooling air pipe is used for being communicated with cooling air; the second cooling air pipe penetrates through the soaking box body, an air outlet of the second cooling air pipe is close to the substrate glass, and the second cooling air pipe is made of a high-temperature-resistant material; and the first cooling air pipe and the second cooling air pipe are communicated through a fixing assembly. The problems that the thickness of the glass plate is repeatedly adjusted, the efficiency is low and the precision is poor due to the fact that the relative position between cooling air and the glass plate cannot be accurately adjusted due to the fact that a thickness air pipe is prone to deformation after long-term use can be solved.

The invention discloses an unequal-thickness flexible glass forming device and glass production equipment, and relates to the technical field of flexible glass production. The unequal-thickness flexible glass forming device comprises a feeding pipe, a material uniformizing hopper and a discharging nozzle. The refining hopper comprises a cache shell and two drainage channels, the two drainage channels are oppositely connected to the two sides of the feeding pipe, the two drainage channels are both connected with the cache shell, the drainage channels are arranged above the cache shell, and the ends, away from the feeding pipe, of the drainage channels are lower than the ends, close to the feeding pipe, of the drainage channels; the discharging nozzle is connected to the lower portion of the temporary storage shell, and a flange is arranged in the discharging nozzle. The unequal-thickness flexible glass forming device provided by the invention can realize one-time forming of unequal-thickness flexible glass, omits an etching processing step, is time-saving and labor-saving, improves the production efficiency, reduces the production cost, is suitable for large-scale commercial production, and is uniform in discharging, good in forming effect, capable of avoiding various product defects and high in yield.

The present application provides glass, a glass forming method, and a glass forming device. The glass comprises a first surface and a second surface which are oppositely arranged, wherein the first surface is provided with an infrared reflection film layer. The glass forming method comprises: heating glass; bending and forming the glass; and performing air blowing cooling on the glass to obtain glass of which the surface compressive stresses of the first surface and the second surface are greater than or equal to 30 Mpa, wherein the air pressure intensity of blowing air to the side of the first surface of the glass is smaller than the air pressure intensity of blowing air to the side of the second surface of the glass. By means of the glass forming method provided by the present application, the glass of which the surface compressive stresses of the first surface and the second surface which are oppositely arranged are greater than or equal to 30 Mpa can be obtained.

The invention provides a vehicle door glass pre-bending molded surface design method, an analogue simulation system, a device and a storage medium. The vehicle door glass pre-bending molded surface design method comprises the following steps: defining a pre-bending area and a pre-bending amount according to glass molded surface data, and constructing a glass pre-bending molded surface according to the pre-bending area and the pre-bending amount data; the pre-bending molded surface of the vehicle door glass is designed by optimizing the pre-bending molded surface of the glass according to the glass forming parameters, the vehicle door glass with the molded surface pre-bending in a local area can be obtained by means of the design method, and outward deformation of the vehicle door glass is counteracted; and a good sealing state of a vehicle door glass area and a normal lifting function of glass are ensured.

The invention discloses a low-carbon glass melting furnace adopting a pre-melting pool, which relates to the technical field of glass manufacturing, solves the technical problem of reducing energy consumption, and comprises a pre-melting pool adopting electric melting or submerged combustion and a clarification pool communicated with the pre-melting pool and adopting flame combustion, a cold top structure is arranged in the upper space of the pre-melting tank, and the upper structure of the clarification tank adopts an arch structure and is hermetically connected with the upper space of the pre-melting tank through an L-shaped hanging wall; in the glass melting process, the silicate forming stage and the glass forming stage are completed in a pre-melting pool, and the molten glass clarifying stage is completed in a clarifying pool. A pre-melting pool is communicated with a clarification pool, electric melting or submerged combustion heating is adopted in the pre-melting pool, combustion space flame heating is adopted in the clarification pool, and a novel function partition structure is developed and designed in a targeted manner according to the fact that all stages of the glass melting process have different required effects on all areas of an energy supply area of the glass melting furnace. And the carbon emission and the energy consumption are obviously reduced.

The invention discloses a calendaring forming device and a glass production line, and relates to the technical field of glass production. The calendaring forming device comprises a rack, a calendaring roller pair, a first cooling roller, a first turning roller and a transition roller set. The rolling pair rollers and the transition roller set are both installed on the machine frame, a pair roller gap is formed between the rolling pair rollers, the first cooling roller, the first turning roller and the transition roller set are sequentially arranged and are parallel to one another, the first cooling roller and the transition roller set are both arranged on the lower side of the glass belt, and the first turning roller is arranged on the upper side of the glass belt. The glass tape passing through the first cooling roller advances to the first turning roller at a first preset angle, the first preset angle is an included angle between the glass tape and the horizontal plane, and the range of the first preset angle is 95-105 degrees. The calendaring molding device provided by the invention can prevent the edge part of the glass tape from bending deformation, prevents the two sides of the glass tape from forming wavy edges, improves the flatness of the glass tape, and ensures the glass molding quality.

The invention discloses a TGV glass substrate with directionally arranged high-precision aperture and high aspect ratio microchannels and a preparation method thereof. Template preparation: depositing a template material on the surface of the substrate, and then forming a template pattern on the surface of the substrate by using photoresist through photoetching, developing and etching technologies; glass powder preparation: melting glass, carrying out water quenching on the glass in a molten state, and then carrying out ball milling on the crushed glass particles to obtain the glass powder; glass powder filling: filling glass powder into the gaps of the template; glass forming: sintering and annealing the obtained template; glass treatment: grinding and cleaning the formed glass; and forming micro-channels: etching the glass by using an etching solution, and cleaning to obtain the TGV glass substrate with directionally arranged micro-channels with high precision aperture and high depth-diameter ratio. The problems that in an existing TGV glass substrate preparation method, microchannel arrangement is difficult to accurately control, the preparation process is complex, and the cost is high are solved.

The invention discloses an energy-saving glass forming machine, and relates to the technical field of glass forming machines, the energy-saving glass forming machine comprises a blowing device and an operation table, the operation table is fixedly connected with a driving motor and a guide rod, an output shaft of the driving motor is fixedly connected with a reciprocating screw rod, and the guide rod is symmetrically in threaded connection with molds; according to the device, the scraping plate rotates around the outer ring surface of the blowing head, so that frit residues on the outer ring surface of the blowing head are removed in time, smooth blowing of the blowing device is guaranteed, and the residues are prevented from being adhered to a bottle opening of a next glass bottle; the blowing head of the blowing device removes attachments after blowing each time, the scraping plate is used for cleaning after blowing each time, defective products or waste products caused by residual frit due to untimely cleaning can be effectively avoided, in this way, the blowing head of the blowing device removes the attachments after blowing each time, defective products and defective products caused by the residual frit can be avoided, and the production efficiency is improved. Therefore, resource waste and rejection rate are reduced.

A monitoring system for a container glass forming machine includes a data acquisition and analyzing unit with at least one coupled sensor, which is controlled by software, running on the unit, records and processes sensor data. At least one visible light camera is connected to the data acquisition and analyzing unit and positioned so that visible light video streams in real time can be taken at least from a blank side section, blow side section, deadplates, and / or transfer conveyor belt and transferred to the data unit. Such visible light video streams are processed by the software based on artificial neural networks, which learned to realize an error or anomaly in the acquired visible light video streams by algorithms in the data acquisition and analyzing unit and in case of detection of an error, an alert to an operator is issued by an alerting and / or feedback unit.

The invention provides a curved reflective glass forming process for a head-up display. The curved reflective glass forming process comprises the following steps: preparing flat original glass; correspondingly fixing an upper die and a lower die on the upper heating plate and the lower heating plate respectively, wherein the upper die and the lower die are in a separated state; setting the temperatures of an upper heating plate and a lower heating plate, and after the temperature of the lower mold reaches T1, putting plate glass into the lower mold; after the plate glass is put into the lower mold for a certain time, pushing the radiation heat source device into a gap between the upper mold and the lower mold; setting a radiation heat source opening formula according to the shape characteristics of the product, and heating the upper mold, the lower mold and the plate glass; when the temperature of the lower die reaches T2, the radiation heat source is closed and pushed out; the upper die falls until the upper die and the lower die are completely assembled, and the condition is kept for a period of time; in a mold closing state, gradually reducing the temperature of the heating plate, preserving heat and annealing; closing the heat source in a mold closing state, and reducing the mold temperature to a certain temperature; and opening the mold and taking materials. The product precision is high, operation is easy, efficiency is high, polishing treatment is not needed, and the production cost is greatly reduced.

Inverting mechanism for a glass forming machine comprising at least one preform, with two mouth-holding arms (2, 3) which are adjustable between a closed position holding an opening area of ​​a cup formed in the at least one preform and an open position releasing this opening area, a central shaft (7) to which the mouth-holding arms (2, 3) are rotationally fixed and about whose central axis the mouth-holding arms (2, 3) can be pivoted from a first pivot position associated with the at least one preform to a second pivot position associated with the finished mold, and a drive device (19) with a motor unit (20) by means of which drive energy for pivoting the mouth-holding arms (2, 3) between their first and second pivot positions can be generated, characterized in thatthat the motor unit of the drive device (19) is designed as a rotary motor (20) with a stator element (25) and a rotor element (21), and that the rotor element (21) of the rotary motor (20) is axially and rotationally fixed to the central shaft (7) of the drive device (19) and the rotary motor (20) is arranged coaxially with respect to the central shaft (7) of the drive device (19).

The utility model provides a bottom die cooling device for high-temperature glass forming. Relates to the technical field of high-temperature glass production, the bottom die cooling device for high-temperature glass forming comprises a water storage tank, the water storage tank is fixedly sleeved with a first annular block, a second annular block is fixedly installed on the top of the first annular block, a circular plate is rotatably installed on the second annular block, a first motor is arranged on one side of the water storage tank, and a second motor is arranged on the other side of the water storage tank. And bevel gears are fixedly installed on an output shaft of the first motor and the second annular block correspondingly, the two bevel gears are meshed, four adjusting mechanisms are arranged on the circular plate, and each adjusting mechanism comprises a strip-shaped plate, an electric push rod, a connecting block, a vertical plate, a U-shaped plate, a first circular rod, a rotating block, a bottom die, a fixing block and a plurality of tooth grooves. The cooling device has the advantages that the operation is convenient, the loss time can be saved, the production efficiency of high-temperature glass is relatively improved, and the cooling effect of the bottom die is improved.

The present application relates to the technical field of glass forming, in particular to a glass tempering and bending forming equipment and a temperature control system thereof, which can flexibly control the temperature of local areas by heating different glass heating areas with different heating elements, thereby ensuring the temperature uniformity control ability of glass heating; based on the similar neighborhood temperature of each glass heating area, the abnormal heating areas are analyzed and screened from the bottom and top of the glass respectively; further considering the possible misjudgment of abnormal heating areas when a large range of temperature anomalies occurs, the calculation of heating control temperature is carried out on the abnormal heating areas and the genus area in the topological structure of the abnormal connected area which may be regarded as a normal heating area according to the temperature deviation between adjacent glass heating areas, so that the accuracy of the heating control temperature of each glass heating area is higher, and the effect of temperature control on the glass heating process according to the heating control temperature is better.

The utility model discloses an edge grinding forming device for glass production, and belongs to the field of glass edge grinding. According to the technical scheme, the edging forming device for glass production comprises a supporting frame, a conveying track, an upper fixing supporting frame and a glass forming component, the conveying track is transversely connected to the center of the supporting frame, the upper fixing supporting frame is arranged on the rear side of the conveying track in a matched mode, and the glass forming component is arranged on the upper fixing supporting frame. And a glass forming part is arranged in the center of the conveying track. According to the device, the structure of existing glassware forming and edge grinding equipment is optimized, and the automatic feeding and conveying component is arranged, so that the glass ware edge grinding batch processing work efficiency is improved; and meanwhile, the chamfering front angle grinding head part and the flat angle grinding head part are arranged in the device, so that the angular position of the glassware part can be subjected to edge grinding treatment, the adaptability of the device in the using process is effectively improved, and the manual labor production cost is reduced.

This invention discloses a glass forming apparatus and a glass forming furnace that facilitates the assembly and disassembly of clamping rollers. The apparatus includes a furnace body, a first sealing window on a first side wall of the furnace body, and a window sealing mechanism for sealing the first sealing window. The window sealing mechanism includes two clamps and a sealing baffle. The two clamps are respectively fixed to the left and right sides of the first side wall of the first sealing window. The sealing baffle has two second sealing windows arranged along a second horizontal direction in its center. Each second sealing window contains a sliding plate that slides along the second horizontal direction, and the sliding plate has a through hole for the clamping roller to pass through. The left and right sides of the sealing baffle are respectively provided with clamp receiving platforms for pressing against the clamps. The clamps press against the clamp receiving platforms to seal the first sealing window. This invention allows for quick opening of the first sealing window when the clamping roller needs to be replaced without affecting the flexible floating of the clamping roller.

This glass molding device (10a) comprises: a molding chamber; an upper die (15) and a lower die (14) that are disposed facing each other in the interior of the molding chamber (26a) and that are molded into a predetermined shape; a lower shaft (19) that supports the lower die to be movable with respect to the upper die; an infrared lamp (28) that heats the upper die, the lower die, and molding glass; a jack (21) that moves the lower die in the direction in which the lower die is pressed against the upper die, thereby pressurizing and molding the molding glass by means of the lower die and the upper die; and an RF power supply (40) that applies a high-frequency pulse between the upper die and the lower die in a state in which a halogen-based gas has been supplied to the interior of the molding chamber when molding is not being performed, thereby generating plasma in the space between the upper die and the lower die and cleaning the upper die and the lower die by means of the plasma.

Provided are glasses containing silicon dioxide (Si02) and / or boron oxide (B203) as glass formers and having a refractive index n greater than or equal to 1.9 d (at 587.56 nm) and a density (measured at 25 °C) less than or equal to 5.5 g / cm 3 Optionally, the glasses can be characterized by high transmission in the visible and near-ultraviolet (near-UV) range of the electromagnetic spectrum and / or good glass forming ability.

The utility model discloses a novel glass forming tool and relates to the field of glass processing, the novel glass forming tool comprises a supporting table and a forming die, the forming die comprises a lower die arranged on the supporting table and an upper die combined with the lower die, and the supporting table is obliquely arranged; a lower mold forming surface and a lower mold forming surface are respectively arranged on the butt joint surfaces of the lower mold and the upper mold, the lower mold forming surface and the lower mold forming surface are in butt joint to form a pouring cavity, one end of the pouring cavity is a pouring port, and the other end of the pouring cavity is closed; the upper mold and the lower mold are closed, one half of the cavity is in the inner cavity of the lower mold, the other half of the cavity is in the inner cavity of the upper mold, downward liquid leakage in the pouring process can be avoided, and the shape precision of glass forming is guaranteed.

The utility model relates to the field of glass conveying equipment, and discloses a flexible shaft conveying device which comprises a plurality of flexible shaft bodies distributed at intervals and a transmission mechanism used for driving all the flexible shaft bodies to rotate synchronously, and the transmission mechanism comprises a power connecting piece and a driving piece used for driving the power connecting piece to rotate. The two ends of each flexible shaft body are provided with power connecting pieces synchronously rotating with the flexible shaft bodies, the axes of the power connecting pieces coincide with the axes of the flexible shaft bodies in the straightening state, and the driving pieces drive the power connecting pieces at the two ends of the flexible shaft bodies to synchronously rotate. The two ends of the flexible shaft are driven to rotate synchronously, the situation of transmission delay of the flexible shaft is greatly improved, the problem that glass deviates from a conveying roller way in the conveying process of the flexible shaft can be avoided, and therefore the forming precision and the yield of the glass are improved.

The invention discloses transparent glass ceramic with tough zirconia fibers and a preparation method thereof, and belongs to the technical field of preparation of glass ceramic materials. The ceramic is prepared by the following steps: melting several of 52-56wt% of SiO2, 22-29wt% of Al2O3, 6-8wt% of MgO, 0.5-2wt% of B2O3, 20-2wt% of SnO, 8-15wt% of ZrO, 20-2wt% of HfO, 50-2wt% of Ta2O and 20-2wt% of TiO2, adding zirconium oxide fibers, casting a glass melt into a graphite mold, carrying out annealing treatment after the glass is formed, and carrying out heat treatment to obtain the ceramic. Cutting the formed glass, performing nucleation and crystallization heat treatment, grinding and polishing to obtain the transparent glass ceramic with tough zirconium oxide fibers. According to the invention, reasonable component design and two-step heat treatment are carried out on the base glass to form the glass ceramic in which crystals, fibers and glass coexist, and the principal crystalline phases are ZrO2 and magnesium aluminate spinel which are uniformly distributed in the glass ceramic, so that the Vickers hardness of the glass ceramic is increased by more than 8.9 GPa, and the Vickers hardness of the glass ceramic is increased by more than 8.9 GPa. And under the condition that the high fracture toughness of 2.7 MPa.m < 1 / 2 > or above is obtained, the good optical performance that the visible light wave band transmittance is 75% or above is kept.

The invention relates to the technical field of glass forming, and discloses float production equipment for glass production, the float production equipment comprises a protective gas conveying device, a control mechanism is mounted at the front end of the protective gas conveying device, and a control system is integrated in the control mechanism. Controlling the gas compression device to input stable working current, compressing part of protective gas in the protective gas conveying device through the other group of output ends of the protective gas conveying device and one group of gas input ends of the gas compression device, and transmitting the compressed protective gas into the first gas tank; and thus, a U-shaped rubber plate, a second roller sliding block and a scraping annular plate are driven to move to the position away from the protective gas conveying device, impurities attached to the inner side face of the output pipe are automatically cleaned in the moving process of the scraping annular plate, and therefore it is ensured that the output pipe can normally convey protective gas; and the overall quality of the glass tape is further ensured.

The invention provides a glass processing bottle blowing forming die and a bottle blowing method, and relates to the technical field of glass processing.The glass processing bottle blowing forming die comprises a die station rotary table and glass forming die bodies, the multiple glass forming die bodies are arranged at the upper end of the die station rotary table and distributed at equal intervals, and the glass forming die bodies further comprise first forming die bodies and second forming die bodies; a first mold fixing strip is arranged on the side surface of the first forming mold; a second mold fixing strip is arranged on the side surface of the second forming mold; a plurality of glass forming molds are rotated at intervals by rotating a mold station rotating disc, a station rotating disc base is arranged at the lower end of the mold station rotating disc, a plurality of machining stations are integrally arranged on the side face of the station rotating disc base, and a glass water frame high platform is arranged at the upper end of one machining station. A glass water conveying pipe is fixedly installed at the upper end of the glass water frame high table, glass water heated and melted in the glass water conveying pipe is extruded into a hollow softened glass pipe in the hollow blank extrusion head, and a section of the softened glass pipe is placed in a glass forming mold.

The utility model relates to glass manufacturing and provides a glass forming heat suction mold which comprises a base, a first boss is formed on the base, a cavity is formed in the first boss, a plurality of air suction holes are formed in the bottom of the cavity and penetrate through the base so that the air suction holes can be connected with a vacuum generator, and glass frit in a hot melting state is placed in the cavity; and then the vacuum generator is started, and air in the cavity is rapidly extracted through the air suction holes, so that tiny marks or recesses left on the surface of glass due to thermal expansion or cooling shrinkage of the air in the forming process are avoided, the quality of glass products is remarkably improved, meanwhile, the production efficiency is improved, and the production cost is reduced.

The utility model relates to the technical field of mould pressing devices, in particular to a vacuum adsorption precise mould pressing device. A plurality of adsorption holes are uniformly distributed in the surface of the lower die; the adsorption hole penetrates to the bottom of the lower die; a connecting pipe communicated with the adsorption hole is fixed at the bottom of the lower die assembly; the connecting pipe is connected to a vacuum pump. When the device is used, gas between the inner cavity of the lower mold and preformed glass can be quickly pumped away in the initial stage of compression molding through the connecting pipe and the adsorption holes by the vacuum pump, so that gas residue between the inner cavity of the lower mold and the preformed glass is reduced to a great extent, and the preformed glass is more attached to the surface of the cavity of the lower mold during molding; and the surface quality of glass forming is higher.