354results about How to "Guaranteed molding effect" patented technology

The invention relates to a wide-span semispherical reinforced concrete dome structure and a construction method thereof. The wide-span semispherical reinforced concrete dome structure comprises a semispherical reinforced concrete dome. The construction method thereof comprises the steps of delivering dome control lines, erecting a full framing, installing keels of the dome, splicing templates andpouring concrete. The steel pipe fastener-type full framing is adopted as a support system of an overall dome roof. The structure is highly safe. The prefabricated templates are adopted and subjectedto bending operation so that high dimensional accuracy is obtained. The templates are formed by splicing of dual-layer curved templates. Seam splicing positions are filled and smeared flat by putty inorder to prevent leakage of slurries and reduce repair cost in the later period.

The invention relates to an environmental-friendly recyclable basalt fiber and jute fiber composite plate for automotive interiors and a production method thereof. The environmental-friendly recyclable basalt fiber and jute fiber composite plate is produced by manufacturing a felt by combining a surface layer with a core layer and then carrying out hot-press forming. The core layer is manufactured by lapping and needling two natural fibers, i.e. basalt fibers and jute fibers, and mixtures of two chemical fibers, i.e. polyster fibers and polypropylene fibers; and the core layer comprises the following components in percentage by weight: 10%-30% of the basalt fibers, 10%-30% of the jute fibers, 20%-30% of the polyster fibers and 30%-40% of the polypropylene fibers. The invention has the advantages of low density, light weight, low cost, high strength, good toughness, large deformation, high safety, environment friendliness, recyclability, and the like.

This invention provides a direct microscopic examination method milk somatic cells/bacteria automatic counter. The automatic counter comprises: a sampling/smearing apparatus, a dyeing apparatus, a washing/drying apparatus, a microscopic detecting apparatus, a convey apparatus for conveying the milk sample as well as glass slide to and out of the sampling/smearing zone, and another convey apparatus for conveying the smeared glass slide to the dyeing zone, washing/drying zone and microscopic detecting zone, which comprises multi-stage glass slide convey mechanisms and glass slide running mechanisms. The automatic analyzer comprises a smearing apparatus, a dyeing apparatus, a washing/drying apparatus a microscopic detecting apparatus and a control apparatus for convey apparatuses. This invention divides direct microscopic examination method milk somatic cells/bacteria analysis and assay into multiple mechanical actions performed by different apparatuses, and sets corresponding working positions and working zones. The working positions and working zones are connected via the convey apparatuses, and can reasonably and effectively perform automatic detection under the control of the control apparatus. The automatic counter has high counting precision and repeat precision, and the working efficiency is largely increased.

The invention discloses a steel wheel balancing block with single weight of more than 60 grams (containing 60 grams), comprising a balancing weight block and a spring hook, wherein the upper part of the spring hook is provided with a clamping part, the lower part of the spring hook is provided with a combination part which is fixed with the balancing weight block together, the upper surface of the balancing weight block is provided with a positioning groove, a protrusion is at least arranged on the bottom surface of the positioning groove, and the lower surface of the balancing weight block corresponding to the protrusion is a plane; and a rivet hole which is matched with the protrusion of the balancing weight block is arranged on the combination part of the spring hook so as to enable the spring hook to be riveted with the balancing weight block together by the protrusion. The invention also discloses a manufacture method of the balancing weight block in the balancing block, comprising the following steps: blanking and punching the positioning groove; bending blanks; cleaning the surfaces of the bent blanks; preheating; coating a lubricant; heating by induction; carrying out temperature plastic molding; deburring; carrying out surface shot blasting; pressing characters on the surface of the balancing weight block; riveting and fixing with a spring hanger; and painting on the appearance.

The invention provides a construction method of a large-span double-sided arc-shaped aluminum plate curtain wall. Through the comprehensive application of a BIM technology and a lofting robot, curtainwall units are reasonably partitioned, adapting parts are reasonably arranged, and then a moulding bed, a curtain wall keel steel truss, the adapting parts and large-span double-sided arc-shaped aluminum plate curtain wall unit plates are accurately and rapidly positioned in an auxiliary mode, so that rapid on-site assembly and positioning installation are realized. According to the constructionmethod of the large-span double-sided arc-shaped aluminum plate curtain wall, the molding effect and precision of the large-span double-sided arc-shaped aluminum plate curtain wall molding are ensuredby adopting a field segmented integral molding bed preprocessing and assembling technology; through the comprehensive application of a BIM model and the lofting robot, the curtain wall keel steel truss and the adapting parts are quickly positioned and welded on site, so that the problem of positioning and mounting of a large number of adapting parts of different specifications on site is solved,the mounting accuracy is greatly improved, and the construction period is greatly shortened; and a segmented hoisting mode is adopted, and through the comprehensive application of the BIM model and the lofting robot, a curtain wall unit panel is accurately positioned, and the hoisting precision and the efficiency are improved.

The invention provides a graphene composite heat-conducting gasket which comprises a plurality of layers of graphene foam films arranged in the thickness direction and an adhesive, and the graphene foam films account for 50 wt.%-95 wt.%. The invention also provides a preparation method of the graphene composite heat-conducting gasket, wherein the preparation method comprises the steps: stacking the graphene foam films layer by layer and putting the graphene foam films into a mold, and applying pressure to tightly fit the films; uniformly coating the periphery of the graphene heat-conducting foam films subjected to pressure application with the adhesive, so as to completely coating a plurality of layers of graphene heat-conducting foam films into a block body; after the block body is cured and formed, cutting the block body into sheets along the stacking direction; dipping the cut sheets in dipping glue, taking out the sheets, and carrying out hot press molding on the taken-out sheets; and trimming the edge of the formed sheets, and removing an adhesive bonding area on the edge to obtain the graphene composite heat-conducting gasket. The heat-conducting gasket is low in density, high in heat conductivity in the thickness direction and low in heat resistance.

The invention relates to a wood truss support structure for an arch cap formwork of a rigid frame arch bridge and a construction method of the wood truss support structure. The structure comprises a lower suspension pull and support rod and an upper suspension arc longitudinal beam, wherein the two ends of the upper suspension arc longitudinal beam are fixedly connected with the two ends of the lower suspension pull and support rod to form a closed bowstring structure, a plurality of vertical wood rods are fixedly connected between the lower suspension pull and support rod and the upper suspension arc longitudinal beam, inclined support rods are arranged among the vertical wood rods, the lower suspension pull and support rod, the upper suspension arc longitudinal beam, the vertical wood rods and the inclined support rods are fixedly connected with one another to form a truss with multiple triangular stable structures, and horizontal pull rods and vertical bridging rods are arranged among a plurality of trusses and are pulled to form an integrated structure. The construction method comprises the following steps of: reinforcing a foundation; constructing arch foot bearing table; elastically setting a control line; installing the lower suspension pull and support rod; and symmetrically installing the plurality of trusses and the like. The structure has a combined effect of effectively supporting a constant load and a construction load, and the construction safety and the shaping quality of an arch cap structure of the rigid frame arch bridge are improved.

The invention discloses titaniferous stainless steel electroslag remelting casting powder which is prepared from the raw materials in parts by weight as follows: 46.0-50.0 parts of fluorite, 20.0-24.0 parts of alumina powder, 18.5-22.5 parts of lime, 3.5-5.5 parts of fused magnesite, 2.0-4.0 parts of titanium dioxide as well as other components: 0.0-0.6 part of SiO2, 18.0-22.0 parts of CaO, 20.0-24.0 parts of Al2O3, 4.2-5.8 parts of MgO, 2.0-4.0 parts of TiO2, 45.0-51.0 parts of CaF2, less than 0.03 part of S and less than 0.03 part of C. Slag is formed by the casting powder according to strict quality control standard so as to ensure that the impurity content is low, the purity is high and the slag is dry and free from moisture. In the electroslag remelting process, desulfuration and deoxygenation effects are enhanced, the resistivity is improved, and the casting powder is free from cutoff in arcing, good in lubrication and relatively easy to popularize and apply.

The invention relates to a printing head for a three-dimensional printer. The printing head comprises a heating block, a throat tube fixedly connected with the heating block and a spraying nozzle, and further comprises a Teflon pipe located in the throat tube in the mode of being coaxial with the throat tube. The section, near a spraying opening, of a melting pipe of the spraying nozzle is a hole expanding outwards. The printing head can effectively prevent extruded fuse wires from adhering and agglomerating to the periphery of the spraying opening, improve printing accuracy and guarantee the forming effect of a three-dimensional object. The invention further provides the three-dimensional printer including the printing head.

The invention discloses a reserved chamber simulating test piece manufacturing die assembly and a method used for manufacturing a test piece. The die assembly comprises a model shell, a solid cylinder, a round through hole, clamps, a bearing plate and a cylinder containing cavity, wherein the model shell has a splitting structure and is formed by two symmetrical parts; a hexahedral sample adding cavity is arranged at the upper part of the model shell, and a press is used for compacting and shaping a sample in the cavity by the bearing plate. The die assembly has a simple structure, and is convenient to disassemble, and the sample can be subjected to mold release conveniently. The invention also discloses the method for manufacturing the test piece by adopting the reserved chamber simulating test piece manufacturing die assembly. The method comprises the steps of assembling a mold, adding the sample, pressurizing the sample, separating the mold, and disassembling the mold. According to the test piece manufactured by adopting the method for manufacturing the test piece by the die assembly, the test piece can be subjected to mold release conveniently, and the pressurized shaping effect of the test piece is good.

The invention discloses a machining process for a double-layer composite metallic tube. The process sequentially comprises the following steps that an outer metallic tube body and an inner metallic tube body are placed into an inner tube model cavity; high-pressure water is led into the inner metallic tube body so as to finish inner high-pressure forming of the inner metallic tube body, and a primary semi-finished double-layer composite metallic tube is prepared; the primary semi-finished double-layer composite metallic tube is placed into an outer tube model cavity; high-pressure water is led into the outer metallic tube body so as to finish inner high-pressure forming of the outer metallic tube body, and a secondary semi-finished double-layer composite metallic tube is prepared; and end post-treatment is conducted on the secondary semi-finished double-layer composite metallic tube, so that the finished double-layer composite metallic tube is prepared. Two passes of inner high-pressure forming are adopted, the forming effects of the inner metallic tube body and the outer metallic tube body are guaranteed, the machining procedures are optimized, and the machining process is more concise, so that the machining efficiency is improved, the profit rate is increased, and the product rejection rate is decreased.

The invention relates to an environment-friendly recyclable natural fiber automobile door plate which is formed by the steps of preparing a composite felt material by a core layer and a surface layer; and performing hot-press and forming. The natural fiber automobile door plate is characterized in that the core layer is prepared by mixing two kinds of natural fibers, namely a basalt fiber and fibrilia, and two kinds of chemical fibers, namely a polyster fiber and a polypropylene fiber, lapping and needling. The core layer comprises the following components in percentage by weight: 10 to 30 percent of basalt fiber, 10 to 30 percent of fibrilia, 20 to 30 percent of polyster fiber, and 30 to 40 percent of polypropylene fiber. The invention also provides a preparation process for the environment-friendly recyclable natural fiber automobile door plate. The environment-friendly recyclable natural fiber automobile door plate has the characteristics of low density, light mass, low cost, high intensity, high toughness, high safety, environmental-friendliness and the like, and can be deformed heavily and recycled.

The invention belongs to the technical field of automobile part hot melt equipment, and provides a hot melt special machine and a hot melt method using the hot melt special machine. The hot melt special machine comprises a frame and a product work bench arranged on the frame; an installation rack, an upper mould fixing plate, an up-down movement guide rail, and an up-down movement cylinder are arranged on the product work bench, the bottom surface of the product work bench is provided with a lower mould storage mechanism, the lower part of the upper mould fixing plate is provided with a mechanism for heating and melting rivets, and the mechanism is opposite to the lower mould storage mechanism and is provided with a secondary buffer mechanism. The hot melt special machine has the advantages that a secondary buffer mechanism is added to guarantee the moulding effect and the rivet force so as to reduce the generation rate of substandard products. Furthermore, an electric and heat insulation block is designed to electrically disconnect the heating body of the hot melt head and the frame so as to eliminate the safety hazard. A gas-cutting baffle mechanism is added to guarantee the safety during sudden interruption of gas supply.

The invention relates to a preparation method of a vermiculite-based high temperature-resistant sealing material. The preparation method comprises the following steps: preparing materials: selecting high-temperature expanded vermiculite powder, chemical expanded vermiculite powder, a modifier and an adhesive; uniformly mixing two types of expanded vermiculite powder and water to obtain a mixed material with the mass concentration of 35-45%; sending the mixed material into a vacuum kneading machine, and adding the modifier for performing surface modification for 0.5-2h; adding the adhesive for performing vacuum kneading for 0.5-2.0h, together with the adhesive; performing coating premoulding on a kneaded slurry, and drying, wherein the moulding thickness is 2.0-4.0mm and the drying temperature is 60-75 DEG C; performing hot-pressing vulcanization moulding on a dried premoulded blank on a hot-pressing vulcanizing machine; cooling and demoulding the material, and cutting into shapes to obtain the vermiculite-based high temperature-resistant sealing materials with different thicknesses. According to a process method of performing coating premoulding first and then performing mould-pressing vulcanization molding, the vermiculite content can reach 95%, the contents of other auxiliary agents are low, and the high temperature resistance of the sealing material is effectively improved.

The invention belongs to the technical field of functional materials, and relates to a zirconium-containing re-sintered electrically-fused mullite brick and a preparation method thereof. The brick isprepared from raw materials in percentage by mass as follows: 70%-95% of electrically-fused mullite, 2%-12% of zirconium-containing substances, 0-27% of Al2O3 micro-powder, 0-10% of SiO2 micro-powderand 0.1%-5% of an additive. According to the brick and the preparation method, zirconia is added to the electrically-fused mullite, so that the alkali vapor erosion resistance and the thermal stress impact resistance are improved while the refractoriness under load is high; and the preparation method of the zirconium-containing re-sintered electrically-fused mullite brick is simple, easy to implement, energy-saving and environment-friendly.

The invention provides edge rolling equipment, which belongs to the technical field of machines. The edge rolling equipment comprises a rack, a main roll, a first regulation roll, a second regulation roll and a movable seat ,wherein the peripheral side surfaces of the main roll, the first regulation roll and the second regulation roll define a transition channel; the rack is provided with a first regulation mechanism and a second regulation mechanism; the first regulation mechanism and the second regulation mechanism are respectively connected with the first regulation roll and the second regulation roll; the first regulation mechanism can drive the first regulation roll to generate linear displacement; the second regulation mechanism can drive the second regulation roll to generate the linear displacement; the rack is provided with a propulsion mechanism used for pushing bar stocks which are horizontally arranged into the transition channel; the movable seat is movably installed on the rack and is provided with an arc-shaped channel used for carrying out edge rolling on the bar stocks; the transition channel is provided with an inlet and an outlet; the inlet is used for receiving bar stocks sent out by the propulsion mechanism, and the outlet is used for unloading the bar stocks into the arc-shaped channel. The edge rolling equipment has the advantages of reasonability in design, convenience in regulation and good forming effect.