60results about How to "Lower extrusion temperature" patented technology

The invention discloses a novel 6063 aluminum alloy material. Rare earth elements are added into the original 6063 aluminum alloy. The novel 6063 aluminum alloy material comprises, based on the weight percentage,0.36%- 0.4% of Si, 0.48% - 0.52% of Mg, 0 -0.35% of Fe, 0 -0.1% of Cu, 0 - 0.05% of Mn, 0 - 0.05% of Cr, 0 - 0.05% of Zn, 0 - 0.05% of Ti, 0.18%-0.22% rare earth elements, 0-0.1% of the remaining impurities and the balance of Al. According to the invention, the content of Mg and Si is controlled within a narrow range. At the same time, cerium-based mixed rare earth elements and alloying element boron are added, which keeps alloy material high strength and high electrical and thermal conductivity; improves machining property and plastic extrusion; and improves production efficiency.

The invention relates to a low-density foamed thermoplastic polyurethane elastic body and a preparation process thereof, belonging to the technical fields of polyurethane elastic bodies and preparation processes of the polyurethane elastic bodies. The low-density foamed thermoplastic polyurethane elastic body comprises the following raw materials such as a macromolecular polyol, a chain extender,an isocyanate and an azo foaming agent in a weight ratio of (40-60): (8-11): (32-49): (3.5-6); and a production process comprises the following steps of: 1, metering, transporting and mixing the raw materials; 2, reacting and extruding; 3, underwater pelletizing; 4, vulcanizing; and 5, inspecting. The molecular structure of the low-density foamed thermoplastic polyurethane elastic body provided by the invention is formed by rigid chain segments obtained by reaction of the isocyanate and the chain extender and flexible chain segments obtained by reaction of the isocyanate and the macromolecular polyol in an alternate manner, has unique comprehensive properties, excellent characteristics such as high tension, high tensile force, high toughness and aging resistance and leading wear resistance and is a mature environmentally-friendly material.

The invention provides high-strength magnesium-lithium alloy and a preparation method thereof. Commercial pure Mg, commercial pure Li, commercial pure Zn, Mg-RY middle alloy are taken as materials; the high-strength magnesium-lithium alloy is prepared from the materials by mass percent: 4.5-5.5% of Li, 2.0-3.8% of RY, 0.2-1.0% of Zn, less than 0.03% of gross of inevitable Fe, Cu, Ni and Si impurities, and the balance of Mg in a mixing manner according to the ratio. The preparation method comprises the steps of: based on commercial pure Mg, commercial pure Li, commercial pure Zn, Mg-RY middle alloy as materials, mixing the following components in percentage by mass: 4.5-5.5% of Li, 2.0-3.8% of RY, 0.2-1.0% of Zn, less than 0.03% of gross of inevitable Fe, Cu, Ni and Si impurities, and the balance of Mg; smelting in a vacuum induction smelting furnace, wherein the inside of the furnace is vacuumized before smelting, and then aerating argon is aerated to protect, the smelting process is carried out under protection of argon atmosphere, and the smelting temperature is 660-750 DEG C; casting the smelted melt into a metal die to obtain as-cast alloy; carrying out hot extrusion for at least twice to obtain the high-strength magnesium-lithium alloy. The obtained alloy disclosed by the invention has high strength and good plasticity; the tensile strength at room temperature is 220-260 MPa; the yield strength is 180-220MPa; the elongation percentage is 15-25%.

The invention discloses a mixed pin barrel cold feeding extruder which comprises a machine barrel installed on a feeding base body, wherein, a screw bolt is arranged inside the machine barrel; a plurality of rows of radial pins are arranged in the length direction of the machine barrel; the radial pins are fixed on the machine barrel through spiral pressing caps; end sockets of the pins stick into a screw slot of the screw bolt and are close to the root surface of the screw bolt; a circumferential grooving is formed in the corresponding position on a screw edge of the screw bolt, and the pinscan be inserted in the circumferential grooving; a plurality of rows of tangential pins are also arranged on the mixed pin barrel cold feeding extruder; the tangential pins penetrate through pin holes formed on the machine barrel, and penetrate through the screw slot of the screw bolt in the tangential direction of the screw bolt; the circumferential grooving is formed in the corresponding position on the screw edge of the screw bolt, and the pins can penetrate through the circumferential grooving; the two ends of each tangential pin are fixed on the machine barrel by nuts through external threads. The tangential pins adopt hollow structures, and fluid cooling medium can pass through the hollow structures. Compared with a common radial pin barrel cold feeding extruder, the mixed pin barrel cold feeding extruder has the advantages of better plasticization mixing effect, lower extrusion temperature, higher production capacity and wider application range.

The invention discloses a backpressure equal-channel angular extruding mould which comprises a pressing plate, a guide pillar, a knocking bar, a convex mould, a guide sleeve, a spring, a concave mould, a mould base, a double-fork type punching head, a heating ring, a positioning slide block, a backpressure ejecting rod and an ejecting rod bracket, wherein the rigidity and strength of punching head are increased by the double-fork type punching head; the positioning slide block capable of sliding back and forth is arranged in a horizontal channel, so that the last sample can be conveniently taken out from the horizontal channel; and backpressure is applied to the sample by a backpressure device in an ejecting rod pressurizing form during an extruding process, so that the extruding temperature is efficiently reduced, the grain is refined and the comprehensive mechanical property of magnesium alloy is improved.

The invention discloses a high-flame-retardant low-gloss dynamically vulcanized thermoplastic elastomer material and a continuous preparation method thereof. The material is prepared from an ethylene-butylene elastomer, polypropylene, a cross-linking agent, lipophilic silicon dioxide, polyethylene wax, an assistant cross-linking agent, a halogen-containing flame retardant, a flame retardant aid, an anti-dripping agent, a lubricant and an antioxidant. According to the thermoplastic elastomer material, the impact resistance can be improved in the presence of the flame retardant, the flame retardant property is excellent, the V0 level can still be achieved under the condition that the thickness is 0.8 mm, the special lipophilic silicon dioxide and polyethylene wax are used for reducing the glossiness of the material, and the glossiness can be remarkably reduced. The production process of the dynamically vulcanized thermoplastic elastomer is low in energy consumption, greatly reduces the production cost, and is very suitable for large-scale process production.

The invention discloses an extrusion method for preparing a high-strength and high-plasticity rare earth-magnesium alloy, which comprises the following steps: using an equal-channel extrusion mold as the extrusion mold, wherein the included angle between a horizontal channel and a vertical channel is 90 degrees; respectively heating the mold and a sample to be extruded, wherein the heating temperature of the sample is different from the heating temperature of the mold, and the heating temperature of the sample is lower than the heating temperature of the mold; performing fast extrusion on the heated sample in the heated mold; and shortening the extrusion process time as much as possible, and applying a back pressure to the direction in which the sample is extruded to ensure that the sample is under a three-dimensional stress. Thus, crystal grains of the rare earth-magnesium alloy prepared by the method are greatly refined, and second phases are precipitated less.

The invention discloses a double-plex extrusion linkage production line with a turnover device, which has good product quality and high production efficiency. The double-plex extrusion linkage production line comprises a double-plex extruder unit which comprises a first extruder, a second extruder and a complex head, the back side of the complex head is provided with a track which is connected with a receiving roll in a relative rotation way, the tract at the back side of the complex head is sequentially provided with a pre-turnover roll, a turnover roll, a leveling roll and a belt pressing roll in a relative rotation way, the pre-turnover roll, the turnover roll, the leveling roll and the belt pressing roll are all positioned above the receiving roll, the pre-turnover roll is slantly arranged, the turnover roll is vertically arranged, the leveling roll and the belt pressing roll are horizontally arranged, and the horizontal position of the leveling roll is higher than that of the belt pressing roll. The pre-turnover roll is arranged on the tract through a pre-turnover roll connecting seat which is provided with a plurality of pre-turnover roll regulation holes. The turnover roll is arranged on the tract through the turnover roll connecting seat which is provided with a carrier roll in a relative rotation way.

The invention discloses a method for preparing fresh wet rice noodles from extruding cooked rice. The method comprises the following steps of (1) selecting raw materials; (2) performing cooking to obtain the cooked rice; (3) mixing materials; (4) performing extrusion and shaping; and (5) performing cooling and packaging. Through the adoption of the method disclosed by the invention, the problems of long production cycle, high cost, high investment, high energy consumption, microbial contamination, poor product quality and the like existing during conventional rice noodle processing are solved.

The invention provides a machining method for a degradable polymer intravascular stent. The machining method comprises the following steps that firstly, a pipe is formed; secondly, a stent base body is formed through laser engraving; thirdly, the surface of the stent base body is polished. In the first step, the pipe is formed through the extrusion technology that cold pressurization is carried out on a plastic pipe, wherein polymer raw materials for the stent base body are heated in a plastic extruder to the temperature higher than the corresponding melting point temperature Tm and lower than the extruding temperature in the normal pressure extruding technology by 5-15 DEG C, 5-20 MPa pressure is applied at the same time, the raw materials are extruded out of a mold of the extruder with the temperature and the pressure maintained, and slow cooling is carried out. Compared with the prior art, by means of the machining method for the degradable polymer intravascular stent, the strength of the obtained intravascular stent is higher, the overall radial supporting force is higher, and the surface of the stent is smoother and free of flaws.

The invention discloses an Aprepitant medicine composition, which comprises Aprepitant, at least one kind of intestine soluble carrier material and at least one kind of nonionic surfactant. The carrier is preferably hydroxypropyl methylcellulose succinate acetate, is favorably for dispersing the Aprepitant medicine to the inside in the molten state; in addition, after the addition of the nonionicsurfactant span, the consumption of the carrier is further reduced; the extrusion temperature is lowered. The invention provides a method for preparing the medicine composition using the Aprepitant asactive ingredients; the problems that in the preparation process of a conventional Aprepitant medicine composition by using an HME technology, the auxiliary material consumption of the Aprepitant isgreat; the storage is difficult, the metastable solid dispersion body has instable physical performance; recrystallization can easily occur; the solubility and dissolving-out speed reduction can be caused, and the like are solved.

The invention discloses a rigid polyvinyl chloride pipe material and a preparation method thereof, and relates to the field of high polymer materials. The rigid polyvinyl chloride pipe material provided by the invention comprises the following components in parts by weight: 100 parts of PVC resin; 1-6 parts by weight of a stabilizer; 1-6 parts by weight of an impact modifier; 10-40 parts by weightof a filler; 1-6 parts by weight of a processing aid; 1-3 parts by weight of a lubricant; 0.5 to 2 parts by weight of toner; and 2-6 parts by weight of silicone powder. The silicone powder with highsilica content and high molecular weight is added into the polyvinyl chloride resin, so that the polyvinyl chloride resin can be used as a wear-resistant agent, and thereby the friction coefficient between silicone is relatively small, the dispersity is uniform, the lubricating property is good, and the surface smoothness of polyvinyl chloride can be remarkably improved.

The present invention discloses a preparation method of brexpiprazole tablets and belongs to the field of pharmaceutical preparations. The brexpiprazole tablets are prepared by directly tabletting brexpiprazole solid dispersion particles and auxiliary materials, and the brexpiprazole solid dispersion particles are prepared by the following method: heating and melting potassium citrate, sorbitol and brexpiprazole in a hot melt extruder, and extruding and granulating the melt materials, wherein a weight ratio of brexpiprazole to potassium citrate is 1:(0.5-2) and a weight ratio of the brexpiprazole to the sorbitol is 1:(1-5). An in-vitro dissolution rate of the brexpiprazole is increased.

The present invention relates to a melt processable polymer composition and a method of improving the melt processability of the host polymer. Said melt processable polymer composition comprises a thermoplastic non-aliphatic host polymer and a minor but effective amount of a fluoropolymer processing aid.

The present invention provides an improved elastomeric composition that includes from about 0.01 to about 0.5 weight percent of a polyorganosiloxane or a combination of polyorganosiloxanes.

Provided is instant whole-wheat crisp chips. A making method of the instant whole-wheat crisp chips comprises the steps that complete wheat grains are used as raw materials, full soaking is performedto make wheat to have saturated water absorption amount, and then cooking, extrusion, tableting and microwave vacuum drying are performed to prepare the instant whole-wheat crisp chips. No man-made additive is added during processing, extrusion and drying are performed under the low-temperature condition, the current trend to 'clean label' foods is conformed, meanwhile the complete wheat grains are processed into crisp chips, the crisp chips are a true sense of whole-wheat food, and the current whole-wheat trend is conformed.

The invention discloses a high-thermal-stability Al alloy and a preparation process thereof. The Al alloy comprises the following components by weight ratio: 1-2% of Mg, 0.2-1% of Zr, 2-4% of Cu, 0.2-1% of Si, 0.01-0.1% of B, 0.5-1% of Fe, 0.1-2% of Ni, 0.5-1% of Ti, 0.1-2% of Mo, no more than 0.02% of Cr, 0.2-1% of a rare-earth element, and the balance Al. The Al alloy prepared through the preparation process disclosed by the invention has the beneficial effects that a conventional Al alloy preparation process is improved; the thermal stability is high; and the stable mechanical properties can still be kept in a high-temperature environment.