55results about How to "Reduce flow marks" patented technology

The invention relates to a suction liquid discharge assisted double-narrow-slit electrolytic cutting machining device and belongs to the field of electrolytic machining. The suction liquid discharge assisted double-narrow-slit electrolytic cutting machining device is characterized in that axial and radial suction devices are additionally arranged on a tube electrode cutter, the flow speed of electrolyte in the machining area is increased, so that products are rapidly discharged, and the machining quality is improved; double narrow slits are formed in a tube electrode, so that the machining face, in the advancing direction, of the cutter is more smooth. The suction liquid discharge assisted double-narrow-slit electrolytic cutting machining device comprises a suction pump, an insulated suction pipe, a double-narrow-slit tube electrode, a power source, an electrolyte circulating system, an electrolysis machining machine tool and a work fixture. The suction liquid discharge assisted double-narrow-slit electrolytic cutting machining device has the important significance in improving the flow speed of the electrolyte, rapidly discharging the products and ensuring one-time electrolytic cutting super-thick workpieces (with the thickness larger than 100mm).

The invention provides a free-spraying polyamide resin with metal effect, and a preparation method thereof. The free-spraying polyamide resin comprises, by mass, 70 to 95 parts of polyamide, 10 to 30 parts of a metal color pigment, 0.1 to 2 parts of a coupling agent, 0.1 to 0.2 part of zinc stearate, and 2 to 8 parts of a lubricating agent. The preparation method comprises following steps: the raw materials are mixed, are delivered into an extruder for melt blending and extrusion, and then cooing, drying, and cutting are carried out so as to obtain the free-spraying polyamide resin with metal effect. According to the preparation method, the metal color pigment is added into polyamide, and accessory ingredients such as the coupling agent and zinc stearate are added, so that the compatibility and dispersity of polymer matrix with the metal color pigment are improved, spraying effect of metal effect of the obtained product is achieved after injection moulding, increasing of production cost and ecological environment pollution caused by spraying are avoided, defects of injection molding products, such as flow lines and weld bond, are reduced, cost is reduced, and application prospect is promising.

The invention relates to the technical field of polypropylene compositions, particularly a low-flow-mark low-weld-mark polypropylene composition and a preparation method thereof. The low-flow-mark low-weld-mark polypropylene composition is prepared from the following raw materials in percentage by weight: 55-70% of polypropylene, 10-20% of hyperbranched polyethylene, 5-20% of ethylene-alpha-olefin copolymer, 10-20% of inorganic filler, 0.2-0.4% of antioxidant, 0.2-0.4% of light stabilizer and 0.5-1% of other additives, totaling 100%. The low-flow-mark low-weld-mark polypropylene composition has the advantages of low density, favorable flowability, low flow mark, low weld mark, favorable shock resistance and the like. The preparation method comprises the following steps: mixing the raw materials according to parts by weight in a high-speed stirrer, putting the mixed raw materials in a double screw machine, and carrying out melt extrusion and granulation. The preparation method has the advantages of simple steps and favorable preparation effect, and is easy to operate.

The invention discloses a PEEK plastic rod production device and process. The PEEK plastic rod production device comprises a main machine and an auxiliary machine. The main machine is an extruder and comprises an extruding system, a rotating system and a control system, wherein the extruding system is a gun barrel screw; the rotating system comprises a motor and a reduction box; the control system comprises an electric appliance instrument and an actuating mechanism; the auxiliary machine comprises a mold, a traction machine, an oil temperature machine, a cutting machine and an oven; the mold comprises a main mold, a guide plate, a heat insulation ring, a forming shaping barrel and a cooling water tank; the oil temperature machine is installed on a shaping section of a forming pipe; the traction machine mainly comprises a transmission device, a roller compression device and a brake device, and is installed behind a heat preserving device; the cutting machine is installed behind an outlet of the mold; the oven is a closed box body. The process comprises the steps of charging, drying, plasticizing extruding, homogenizing distributing, forming/shaping, pulling, cutting/stacking and thermal processing.

The invention provides a functional composite material poly ethylene halide resin, which is prepared by the solution method, the block polymerization method or the suspension polymerization method. The poly ethylene halide resin is prepared through the following steps: (1) providing ethylene halide monomer or multiple polymerization monomers mainly including ethylene halide monomer 90.0 to 99.9 wt% of total composition; and (2) sectionally adding or adding at a time multiple alkyl acrylate monomer or alkyl acrylate/acrylic polymer emulsion/dried substance 10.0 to 0.1 wt% of total composition, and carrying out copolymerization or graft polymerization reaction, wherein the polymerization monomer (ethylene halide monomer or multiple polymerization monomers mainly including ethylene halide monomer) is added in bath or sectionally continuous added, and the multiple alkyl acrylate monomer or alkyl acrylate/acrylic polymer emulsion/dried substance is continuously added during reaction process or is placed into a coincidence tank before reaction.

The invention discloses a dyeing flow mark inhibition additive and a method for drying an aluminum alloy anode. The dyeing flow mark inhibition additive is prepared from the following components in parts by mass: 7.5 to 10.5 parts of nickel acetate, 3.5 to 5.5 parts of sodium acetate, 7.5 to 10.5 parts of polydimethylsiloxane, 3.5 to 5.5 parts of mannitol, 3.5 to 6.5 parts of triethanolamine and 4.5 to 6.5 parts of ammonium sulfate. The dyeing flow mark inhibition additive disclosed by the invention can inhibit conditions of blistering, PH unstability and non-uniform dyeing agent distribution of dyeing bath liquid for oxidization dyeing of the aluminum alloy anode, so that quality abnormities such as flow marks and spots during dyeing are reduced; furthermore, the dyeing capability of dyeing bath liquid can be promoted, and the service life of the dyeing bath liquid for oxidization dyeing of the aluminum alloy anode can be further prolonged from the original one week to about three weeks; and therefore, the bath building frequency is reduced, equipment operation is enhanced, and the dyeing cost is reduced.

The invention relates to the technical field of casting, and provides a graphite type coating paste for titanium and titanium alloy casting and a preparation method thereof, and application of graphite type coating paste for titanium and titanium alloy casting. The graphite type coating paste comprises the following components: refractory aggregate, a binder, a bonding promoter, a dispersant and an antifoaming agent; the refractory aggregate is composed of zirconium dioxide, titanium dioxide and titanium hydride, wherein the mass ratio of zirconium dioxide to titanium dioxide to titanium hydride is (50-55):(40-45):(1-5). The refractory aggregate of the coating paste provided by the invention does not contain rare and precious metal oxides such as yttrium oxide and hafnium oxide, the graphite type coating paste is low in cost, stable in coating chemical property and high in high-temperature anti-burst performance, and can be applied to graphite mold casting of titanium or titanium alloy, and an obtained casting is low in roughness, thin in pollution layer, few in surface flow marks and free of cracks.

The invention discloses an HDPE modified material for improving the pearly luster color masterbatch forming line and application of the material, and belongs to the field of material application. The HDPE modified material is prepared from, by mass, 50-90% of extrusion blow molding grade HDPE and 10-50% of LDPE or LLDPE. The HDPE modified material has the advantages that the effect of improving the pearly luster line and the flow line in forming is good, production efficiency is improved, only a pouring cup needs to be detached to be polished during production, the time for cleaning mold head parts is greatly shortened, and production efficiency is improved; the color and luster of the material are improved, and the material is helpful for improving the pearl luster line and the flow line; the production cost of the product is not increased, and the product performance is not influenced; component compatibility is good, no special requirements exist during machining, so the production cost of the product can not be increased; the mechanical performance of the LDPE is weak, but co-mixture only needs to be used on the outer layer, so the ratio of the co-mixture in the product is small, and the physical performance of the product is not remarkably influenced.

The invention provides an air conditioner panel assembly. The air conditioner panel assembly comprises a panel and a decoration strip, wherein a decoration strip groove is formed in the front surfaceof the panel; the decoration strip is produced through injection molding of a metal texture spraying-free material and is mounted in the decoration strip groove; a plurality of clamping buckles whichare raised backwards are arranged on one side, facing to the decoration strip groove, of the decoration strip; and clamping holes which are in one-to-one correspondence to the plurality of clamping buckles and are matched with the clamping buckles are respectively formed in positions, opposite to the plurality of clamping buckles located in the decoration strip, in the decoration strip groove. According to the air conditioner panel assembly, the size of each clamping buckle in a transverse direction of the decoration strip is smaller than a distance between an upper end surface highest point and a lower end surface lowest point of the clamping buckle in a vertical direction, so that the generation of flow marks on the decoration strip in the injection molding process is generated, so thatthe smoothness degree of the surface of the decoration strip is improved; the process of removing the flow marks is avoided; and the metal color effect of the surface of the decoration strip is improved.

The invention discloses an injection pressure-boosting and speed-increasing structure of a die casting machine. The injection pressure-boosting and speed-increasing structure comprises an injection punch, wherein an injection part is arranged at one side of the injection punch; an injection oil cylinder, an injection piston rod and a pressure-boosting oil cylinder are sequentially arranged at the other side of the injection punch; a pressure-boosting cavity is formed between the injection piston rod and the pressure-boosting oil cylinder; and a primarily quick oil path block assembly and a secondarily quick oil path block assembly are arranged on the pressure-boosting oil cylinder. According to the injection pressure-boosting and speed-increasing structure, the speed of the primarily quick action and the secondarily quick action is increased by a design method and a control mode which are combined with a practical production process, so that requirements of producing thin-wall parts such as a magnesium alloy mobile phone middle plate and the like are met, and a common horizontal type cold chamber die casting machine is transformed into a special die casting machine for thin-wall parts represented by the die-cast magnesium alloy mobile phone middle plate; the modified die casting machine can realize that cast pieces are full, less in shrinkage cavities, smooth in surface, good in smoothness, free of flow marks, less in flanges, free of air bubbles and flaws and high in practicability, and meet processing requirements.

The invention relates to the technical field of PP alloy materials, in particular to a spraying-free PP/PCTG alloy material with a colorful effect and a preparation method of the spraying-free PP/PCTGalloy material. The alloy material comprises the following components in parts by mass: 10-35 parts of homopolymerized PP resin, 40-65 parts of copolymerized PP resin, 5-15 parts of PCTG resin, 4-8 parts of a POE flexibilizer, 1-2 parts of a lubricant, 0.5-1.5 parts of a weather-resistant agent, 5-15 parts of a colorful pearlescent master batch and 0-5 parts of a compatilizer II, wherein the colorful pearlescent master batch comprises the following preparation raw materials in parts by mass: 60-90 parts of homopolymerized PP resin, 3-5 parts of a compatilizer I, 10-30 parts of a colorful pearlescent pigment, 1-5 parts of a coupling agent, 1-5 parts of a directional arrangement agent, 1-2 parts of a lubricant and 0.1-0.5 part of an antioxidant. The PP/PCTG alloy material has good impact resistance, and a good colorful effect can be achieved without spraying.

The invention discloses an aluminum section bar surface brightening method. The aluminum section bar surface brightening method comprises the steps of sand blasting, oil removing, water washing, polishing, oxidizing, coloring, medium-temperature hole sealing and electrophoresis curing, wherein the polishing is performed inside a three-acid polishing tank, the three-acid polishing tank contains theingredients of, in percentage by weight, 65-85% of phosphoric acid, 14-22% of sulfuric acid and 6-8% of nitric acid, the polishing is performed for 20-25 min under the condition of the polishing temperature being 100-110 DEG C, and by means of reduction of the oxidizing temperature and the oxidizing tank sulfuric acid concentration, the oxide film production speed can be reduced, a more uniform and compact oxide film is obtained, and appearance of flow marks in aluminum materials is reduced; and the aluminum materials are not prone to fading when being subjected to the water washing and electrophoresis after being subjected to the coloring and the hole sealing and high adhesion can be obtained when the electrophoresis is performed in a half hole sealing state, and when combination with the electrophoresis is performed, suitable voltage can slow down the paint film coating speed, in addition of an appropriate curing method, dye color changing and coating surface roughness and excessivebrittleness can be prevented, and the coating adhesion is improved.

The invention discloses a silver spraying-free polypropylene alloy for a lower bumper guard plate and a preparation method of the alloy. The alloy is prepared by mixing 48-72 parts of polypropylene, 8-12 parts of polyethylene, 15-30 parts of an inorganic filler, 5-10 parts of a toughening agent, 0.2-0.8 part of an antioxidant, 0.2-0.5 part of a light stabilizer, 1-3 parts of metal powder, 0.2-0.5part of a coupling agent and 0.2-1 part of a lubricant and then extruding the mixture for granulating. The polypropylene alloy prepared by means of the method can be matched with a high-gloss mirror surface mold to obtain high gloss and a great appearance with a metal effect without spraying and direct injection molding. Compared with a paint spraying process, the method has the advantages that the cost is greatly reduced, and scrapping caused by a paint shedding problem in a use process of a product is avoided at the same time; a preparation process is simple, and the obtained polypropylene alloy has great comprehensive performance and completely meets the performance requirements of bumpers for materials; meanwhile, a finished product has an obvious metal effect and can be used as a lower bumper guard plate material in cooperation with the high-gloss mold for injection molding.

The invention discloses a novel hot dipping aluminum alloy with hydrogen sulfide and sodium chloride corrosion resistance. The aluminum alloy comprises the following components in percentage by weight: 0.1-0.2 wt.% of Ba, 0.3-0.5 wt.% of Hf, 0.4-0.6 wt.% of Ca, 1.2-1.5 wt.% of Bi, 0.2-0.4 wt.% of Sc, 0.1-0.2 wt.% of Eu, 0.2-0.3 wt.% of S, and the balance aluminum. The aluminum alloy solves the current situation of backward technologies in the national hot dipping aluminum alloy field at present, and breaks through the bottleneck of restricting the development of hot dipping aluminum steel plate production technologies and equipment in the national high-end field through technology innovation and optimal design. In the near future, the material can be widely applied to more fields.

The invention provides a spraying-free pearlescent ABS material and a preparation method thereof. The material is prepared form the following components by weight: 40-60 parts of ABS resin, 20-30 parts of PMMA resin, 10-20 parts of AS resin, 1-10 parts of a plasticizer, 0.1-1 part of a heat stabilizer, 0.1-1 part of a lubricant and 1-5 parts of pearlescent toner. The spraying-free pearlescent ABSmaterial prepared according to the invention has good mechanical properties, greatly saves the cost compared with the previous spraying materials, also is environment-friendly and reliable, and has the characteristics of high mechanical properties, easy machining shaping, etc., especially has good appearance, and can achieve the spraying-free effect.