35results about How to "Wide performance range" patented technology

This invention discloses a method for manufacturing high heat-conductive graphite foam material. The method comprises: (1) heating asphalt in a reactor at 1-5 deg.C / min to 260-400 deg.C; (2) pressurizing to 2-6 MPa; (3) heating at 1-2 deg.C / min to 350-550 deg.C; (4) keeping the temperature for 15-120 min, and discharging the gas to obtain asphalt foam material; (5) heating to 950-1100 deg.C under nitrogen protection to obtain carbonized asphalt foam material; (6) heating to 2600-3000 deg.C under nitrogen protection for carbonization, and cooling naturally to obtain high heat-conductive graphite foam material. The pore sizes are 80-800 mum, the density is 0.28-0.75 g / cu cm, the porosity is 55-85%, and the heat conductivity is 68-140 W / mK. The high heat-conductive graphite foam material can be widely used in radiator, heat exchanger, automobile, airplane brake block, catalyst carrier, gas adsorbent and composite material.

The invention disclosess a segmented copolymer of poly-p-dioxanone / polyethylene glycol terephthalate; the copolymer is characterized of being prepared by dropping coupling agent diisocyanates in a fused mass formed by melting modified low-melting polyethylene glycol terephthalate pre-polymers whose melting point is not greater than 210 degrees centigrade, the limiting viscosity number is not greater than 1.5 dL / g and both ends are hydroxyl groups, and poly-p-dioxanone whose the limiting viscosity number is not greater than 0.8 dL / g and both ends are hydroxyl groups at a certain temperature, the limiting viscosity number of the copolymer is 0.5 to 2.5 dL / g, and the melting point is at 100 to 180 degrees centigrade. The invention further discloses a method for preparing the copolymer. The segmented copolymer discloseed by the invention has high molecular weight and excellent thermal stability and machinability, and has excellent biodegradability of poly-p-dioxanone, which lays the foundation for the materials as commercial macromolecular material. The invention is simple in process and easy to control the reaction, thereby realizing large-scale and continuous industrial production.

The invention relates to a manufacturing device and a manufacturing method for a folding honeycomb precursor. The device comprises a rack, an upper roller press cutter wheel, a lower roller press cutter wheel, a feeding mechanism and a control mechanism, wherein the upper roller press cutter wheel and the lower roller press cuter wheel are fixed on the rack, the feeding mechanism and the control mechanism are arranged on one side of the rack, the upper roller press wheel and the lower roller press cutter wheel are oppositely arranged, the feeding mechanism is used for feeding a plastic sheet between the upper roller press cutter wheel and the lower roller press cutter wheel, annular cutter structures are arranged on the upper roller press cutter wheel and the lower roller press cutter wheel in the circumferential direction of the upper roller press cutter wheel and the lower roller press cutter wheel, horizontal cutter structures are arranged on the upper roller press cutter wheel andthe lower roller press cutter wheel in the length direction of the upper roller press cutter wheel and the lower roller press cutter wheel, the upper roller press cutter wheel and the lower roller press cutter wheel rotate under the control of the control mechanism, and the plastic sheet is machined into the folded honeycomb precursor with a target shape through the annular cutter structures and the horizontal cutter structures. According to the manufacturing device and the manufacturing method, a honeycomb core material with reinforced fibers can be rapidly and continuously produced, the performance range of the plastic honeycomb core is widened, the production cost is reduced, the production efficiency is improved, and the production requirements of high efficiency and low cost are met.

The invention discloses a preparation method of a polyurethane-polyisocyanurate thin-film graded material. The preparation method comprises the steps that aromatic diisocyanate and oligomer diol are used as raw materials, organic tin and Sudan blue are used as catalysts, a polyurethane-polyisocyanurate cross-linked network is prepared through urethane forming reaction and polycyclic trimerization reaction, and then a solution containing a reactor and the catalysts is poured into a hydrophobic mold to obtain a thin film through curing. Reaction mixture solutions different in proportion are poured onto a horizontal polycyclic surface, so that one surface of the prepared graded thin film is higher in elasticity modulus, the other surface of the prepared graded thin film is lower in elasticity modulus, the elasticity modulus in the thickness direction of the thin film changes from one surface to the other surface in a graded mode, no interface exists, the gradient change from soft rubber to rigid plastic of the prepared thin film in the thickness direction is presented macroscopically, the shortcomings of the brittleness and fragility of plastic thin films can be overcome, and the problem that the elasticity modulus of the rubber thin film changing with strain change can be also solved.

The invention discloses pla / polyethylene terephthalate segmented copolymer, which is characterized in that the copolymer is prepared by the melting reaction of low melting point polyethylene terephthalate with the melting point of 110 to 210 DEG C and the intrinsic viscosity of 0.3 to 1.5dl / g and hydroxyl at two ends and pla-prepolymer with hydroxyl at two ends and the intrinsic viscosity of 0.05to 0.5dL / g under the presence of the coupling agent of diisocyanate. The intrinsic viscosity of the copolymer is 0.3 to 2.5 dL / g, the melting point is 110 to 210 DEG C. The invention also discloses apreparation method for the copolymer. The segmented copolymer which is provided by the invention not only has high molecular weight and good thermal stability as well as machinability, but also has excellent biodegradability of PLA and establishes the basis for the materials as the general type polymer materials. The segmented copolymer has simple method and process, low cost by adopting the direct melting method to prepare lactic acid and easy controlled reaction, and thereby can realize the scale and continuous industrial production.

Belonging to the field of artware making, the invention discloses a making method a cloth engraved painting and a special electric soldering iron. The method includes the steps of: 1. selecting a cloth material and treating it; 2. selecting a painting heart color according to a pattern, and conducting back adhesive treatment on the painting heart; 3. cutting the painting heart according to the pattern size, and ironing the painting heart onto the back and belly according to a mounting proportion; 4. covering the painting heart with a drawing, taking out the pattern cloth, selecting a picture needed color, putting the cloth below the drawing, and performing tracing; 5. carrying out engraving with the electric soldering iron according to a contour line; 6. tearing off the excess cloth; 7. re-engraving the picture; 8. pasting the outer contour with a silk thread and a glue; and 9. performing mounting treatment according to requirements. The invention also discloses the electric soldering iron, and its soldering iron can be in a variety of shapes and is retractable. The product made by the method provided in the invention is beautiful, and has strong sense of appreciation, as well as high artistic value and collection value.

The invention provides a massage bathtub pump which comprises a pump shell assembly, an impeller, a bearing, a pump cover assembly and an electric motor, wherein the impeller sleeves the bearing by a shaft sleeve; one side of the impeller is in a sealed connection with the pump cover assembly by a large O-shaped ring, and the other side is connected to the pump shell assembly through mechanical sealing; the shaft sleeve passes through the mechanical sealing and is in a sleeved connection with the bearing; the pump cover assembly is composed of a suction section, a cover shell and a lead-in component; the lead-in component is composed of three guide blades which are connected by round sleeve rings and bent in a certain direction; the guide blades are shaped like sectorial rings; the three guide blades cover a gradually expanded suction pipe of the suction section; and a raised guide block is disposed on each guide blade. The massage bathtub pump is characterized in that flow guide sheets are installed, so that water flows can enter the pump body smoothly; water flow pressure is reduced; collision of the water flows to the pump cover is reduced; efficiency is increased, and noise is reduced; local wear is avoided; a pump performance scope is expanded; and operations are convenient.

The invention provides a half-opened impeller stainless steel centrifugal pump. The centrifugal pump comprises a pump shell component (4), an impeller (11), a bearing (18), a pump cover (13) and a motor (14). The bearing (18) is sleeved by the impeller (11) by virtue of a shaft sleeve; and one side of the impeller (11) makes contact with a slide stop sleeve I (16) through a spring washer (10), and the other side of the impeller (11) makes contact with a slide stop sleeve II (19) through a mechanical seal (12). The mechanical seal (12) can penetrate through the slide stop sleeve II (19) to be clamped in a cylindrical clamping groove in the pump cover (13); a gap between the slide stop sleeve I (16) and the impeller (11) is adjusted through a stop sleeve nut I (15); and a gap between the slide stop sleeve II (19) and the impeller (11) is adjusted through a stop sleeve nut II (17). The centrifugal pump provides adjustable and controllable impeller gaps, prevents local wear, widens the performance range, and is scientific in design and convenient for operation.

The invention discloses a frequency conversion high-speed wet type submersible pump relating to a fluid mechanical submersible pump and comprising a base (1), an impeller (3), a guide blade (4), a rear pump cover (5), a front sliding bearing (6), a thrust plate (7), a motor, a rear sliding bearing (11), a rear end cover (12), an outlet flange (14), an induction wheel (2), an auxiliary impeller (10), a filter (15) and a cooling pipeline (16), wherein the impeller (3) is connected with a motor shaft and is in a partially flowing or eccentric structure, the front end of the impeller (3) is provided with the variable pitch induction wheel (2), the outlet of the impeller (3) is provided with the guide blade (4); and the motor adopts a frequency conversion motor. The frequency conversion high-speed wet type submersible pump is a novel industrial pump with the advantages of small size, light weight, large lift, high efficiency and wide performance range, and is used for mine production drainage, permeable emergence and rescue and emergence drainage of other occasions.