340 results about "Screw speed" patented technology

The invention relates to a degradation disposable syringe and a method of preparing the syringe. The syringe includes an outer cover, a core pin, a needle seat and a needle cap, which can be degraded in the natural environment. The basic material for degradation is prepared with degradable polymer main material, plasticizer, stabilizer, stabilizing additive and filling compound, etc. The detailed injection molding process for all parts of the syringe is: the injection temperature for a feeding opening is 20 to 60 DEG C; the injection temperature for a compression section is 100 to 200 DEG C; the injection temperature for a measurement section is 130 to 240 DEG C; the injection temperature for a spray nozzle is 130 to 220 DEG C; the mold temperature is 20 to 50 DEG C; the injection pressure is 40 to 200MPa; the injection time is 8 to 90 seconds; the pressure holding time is 0 to 5 seconds; the screw speed is 20 to 180 r/m; all performances of the degradation syringe totally meet the national standard (GB15810-2001). After being abandoned, the syringe does not pollute the environment, prevents illegal recycling, and can totally replace the disposable polyolefin syringes.

A bulk of polyester polymer particles comprising polyester polymer comprising greater than 75% virgin polyester polymer, the particles having: A) an It.V. of at least 0.72 dl/g, and B) 10 ppm or less of residual acetaldehyde; and C) at least two melting peaks, wherein one of said at least two melting peaks is a low peak melting point within a range of 140° C. to 220° C. and having a melting endotherm area of at least the absolute value of 1 J/g.

The particles may also have a degree of crystallinity within a range of 20% and a maximum degree of crystallinity T_cmax defined by the equation:

T_cmax=50%−CA−OH

where CA is the total mole % of all carboxylic acid residues other than terephthalic acid residues, based on 100 mole % of carboxylic acid residues, and OH is the total mole % of all hydroxyl functional compound residues other than ethylene glycol residues, based on 100 mole % of hydroxyl functional compounds residues. The preforms and bottles made from these particles can be obtained by melt processing these particles at either lower overall power, faster screw speeds, lower residence time, or lower overall cycle time to thereby reduce the level of residual acetaldehyde generated in the melt.

The invention relates to a low-dielectric laser direct structuring composite material suitable for 5G communication. The composite material is composed of the following components in parts by weight:52 to 86 parts of base resin, 0 to 30 parts of glass fibers, 10 to 30 parts of a filling agent, 1 to 9 parts of a flame retardant, 4 to 15 parts of a toughening agent, 0.1 to 1 part of a lubricating agent, 0.2 to 1 part of an antioxidant and 10 to 30 parts of a laser sensitive additive. A preparation method of the composite material comprises the steps that a twin-screw extruder is used for processing, the melt extrusion temperature is 250-380 DEG C, and the screw rotating speed is 150-300 rpm/min. The composite material has low dielectric property, so that improvement of the transmission speed of 5G communication millimeter wave signals is facilitated, the signal delay is reduced, and the signal loss is reduced; the composite material has the LDS processing capacity, can be rapidly prepared in a small size and a large number, can be subjected to batch laser etching and chemical plating to form a metal connecting circuit, and is an optimal solution of a 5G plastic antenna oscillator material.

The invention discloses a processing method of fresh-cut potato rice-flour. The method mainly contains the following steps: Step 1, soaking rice to obtain soaked rice; dicing fresh potatoes, and carrying out centrifugal dehydration until water content is 65-75% to obtain fresh-cut potato granules; Step 2, extrusion forming: mixing the soaked rice and the fresh-cut potato granules according to the mass ratio of 1-3:1, and carrying out extrusion forming to obtain primarily-processed rice flour, wherein technological conditions of the extrusion forming are as follows: bore diameter of a rice-noodle producing board is set as 1.5-2.0 mm; feed speed is 54-70 r/min; twin-screw speed is 130-170 r/min; and middle area temperature of an extrusion cylinder is 95-110 DEG C; Step 3, curing, letting the primarily-processed rice flour stand at the temperature of 18-20 DEG C at the relative humidity of 75-85% for 13-18h so as to obtain cured rice flour; and Step 4, drying: drying the cured rice flour by a gradient temperature-control and humidity-control oven drying method so as to obtain the rice flour.

The invention relates to an elastomer cable material for oil-resistant cold-resistant high-temperature-resistant electric automobile charge piles and a preparation method thereof. The elastomer cable material is characterized by mainly comprising the following raw materials in parts by weight: 15-35 parts of styrene elastomer, 10-35 parts of thermoplastic polyurethane elastomer, 10-25 parts of nitrile-butadiene rubber, 10-30 parts of reinforcer, 3-5 parts of compatilizer, 10-25 parts of polyolefin compound, 10-40 parts of flame retardant, 1-10 parts of flame-retardant synergist and 2-5 parts of smoke inhibitor. The preparation method comprises the following steps: 1. weighing the materials according to parts by weight; 2. adding the materials into a high-speed mixer, stirring for 8-10 minutes, and stopping stirring; 3. adding the obtained mixed material into a double screw extruder, and carrying out melt kneading and extrusion, wherein the extrusion temperature is 190-240 DEG C, and the screw speed is 200-500 rpm; and cooling the melt output substance with water, granulating, and packaging. The elastomer cable material has the advantages of excellent oil resistance, excellent cold resistance, excellent high temperature resistance, low smoke, no halogen and environment friendliness.

The present invention provides a method of separating a polymer from a solvent comprising introducing a superheated polymer-solvent mixture into an extruder, and isolating a polymer product, said extruder being equipped with at least one vent operated at subatmospheric pressure and at least one vent operated at about atmospheric pressure, said extruder having a screw diameter D, said extruder being operated at a feed rate FR and at a screw speed RPM such that a devolatilization performance ratio (DPR) given by Equation (I)

DPR=FR/RPM  Equation (I)

is selected from a predetermined set of devolatilization performance ratios which correlate with a target characteristic of the polymer product.

The invention relates to a servo bottle cap screwing mechanism in the technical field of packaging machinery, which comprises a cap screwing head, a waste cap withdrawing mechanism, an idler wheel mechanism, base blocks, a servomotor, a connecting support and a motor control system, wherein, the cap screwing head, the idler wheel mechanism, the servomotor and the connecting support are arranged on the base blocks, the motor control system controls the servomotor to rotate at certain rotating speed and torque, and the generated dynamic power is transferred to the cap screwing head by the idler wheel mechanism, so as to cause the cap screwing head to rotate along with the servomotor; the connecting support is connected with a lifting guide rod to drive the base blocks to raise and fall periodically, and the height of the waste cap withdrawing mechanism is unchanged, and the waste cap withdrawing mechanism is arranged at a cap screwing machine. Under the germfree condition, the entire bottle cap screwing mechanism is lubrication free, has no leakage, is convenient for frequent rinsing and disinfection; the cap screwing torque is controlled by computer, the cap screwing mechanism is driven by servomotor and has large adjustable range; and besides, the working torque, the cap screwing speed, and the like, of the single cap screwing mechanism can be displayed, and the cap screwing mechanism can automatically discharge waste or abnormal caps.

The invention is a method for operating an extruder temperature controller. The method can include sensing an actual screw speed for an extruder screw in an extruder barrel. The extruder barrel has at least one heat exchange means. The method can then involve indexing and storing a plurality of screw speeds. Each of the stored screw speeds corresponds to a temperature reset value. Comparing the actual screw speed with each of the stored screw speeds can then be performed. Selecting one of the stored screw speeds can then occur. The selected screw speed is a member of the plurality of stored screw speeds having a value most arithmetically equivalent to the actual screw speed. The step of selecting retrieves the temperature reset value corresponding to the selected, stored screw speed. Generating a control output driver signal to the heat exchange means can occur. The control output driver signal is responsive to the retrieved temperature reset value. The invention includes delaying a control alarm for a predetermined time when generating a control output driver signal to the heat exchange means is at or near maximum capacity.

The invention belongs to the technical field of biodegradable materials, and discloses a bagasse/cassava starch polylactic acid biodegradable material and a preparation method thereof. The bagasse/cassava starch polylactic acid biodegradable material comprises the following components in percentage by mass: 5-20% of bagasse, 10-40% of cassava starch, 20-60% of polylactic acid, 5-20% of polycaprolactone, 0.5-3% of coupling agent, 0.5-5% of plasticizer, and 1-5% of lubricant and heat stabilizer. The preparation method comprises the following steps: uniformly mixing the components, adding into a double screw extruder, and carrying out extrusion granulation at the extrusion temperature of 80-140 DEG C at the screw speed of 40-100 r/min to obtain the bagasse/cassava starch polylactic acid biodegradable material. The material has favorable biodegradability and mechanical properties, and can be used for preparing daily plastic products.

The invention discloses a preparation method of a luminescent polyamide composite material. The method comprises the following steps of (1) preparing a graphene/red-light phosphor/SiO2 composite material; (2) weighing the following materials in parts by weight: 60 to 70 parts of nylon resin, 30 to 40 parts of hybrid glass fiber reinforcement, 1 to 5 parts of nylon master batch, 1 to 5 parts of graphene/red-light phosphor composite material and 0.1 to 0.3 part of antioxygen; extruding the materials by a double-screw extruder and pelleting, wherein the hybrid glass fiber reinforcement is added through a side-feeder, the screw speed of the double-screw extruder is 120 to 150r/min, the temperature is 265 to 280 DEG C, and then the polyamide composite material is obtained. The preparation method of the luminescent polyamide composite material can enhance the dispersity and the luminance uniformity of phosphor in the luminescent polyamide composite material, and the high luminescent intensity is obtained.

A metering roller, for a fuser release oil applicator, which enables precise and consistent application of a predetermined target amount of release oil to the fuser roller. Starting with tubing stock that has been machined and course ground to a final outside diameter, the metering roller is produced by initial pre-finish polishing, electroplating with Nickel, heat treatment to achieve a hardened surface, and final post-finish polishing. Both pre-finish and post-finish polishing steps are performed on a lathe with continuously fed polishing paper according to a parameter recipe that includes lathe spindle rpm and lead screw speed, and polishing paper grit, feed rate, pressure, and oscillatory rate.

The invention relates to a method for preparing a high-toughness degradable material by using a melt-grafting blending method, which comprises the following steps: (1) carrying out melt-grafting on polycaprolactone PCL, anhydride and an initiator, and then obtaining modified polycaprolactone by way of extrusion granulation, wherein the mass ratio of the polycaprolactone PCL to the anhydride to the initiator is 100: (1 to 10): 0.5; and (2) carrying out melt-grafting blending on poly (3-hydroxybutyrate-3-hydroxyvalerate) PHBV, the modified polycaprolactone, methyl acrylate and an initiator, and then obtaining the high-toughness PHBV-class degradable material by way of extrusion granulation, wherein the mass ratio of the poly (3-hydroxybutyrate-3-hydroxyvalerate) PHBV to the modified polycaprolactone to the methyl acrylate to the initiator is 100: (5 to 50): (0.5 to 10):0.5, the processing temperature is 100 to 170 DEG C, and the screw speed is 50-80 R.P.M. The method is simple in process, low in cost, and suitable for industrialization, and the elongation at break of the produced PHBV-class degradable material can reach 560 percent; therefore, the method of the invention has good application prospect.

The invention relates to a hydrotalcite flame-retardant polypropylene (PP) composite material and a preparation method thereof. The material comprises the following components in percentage by weight: 50-85% of PP, 1-10% of compatilizer, 10-35% of flame retardant, 1-10% of hydrotalcite, 0.1-1% of antioxidant and 0.1-0.5% of lubricating-dispersing agent. The preparation method comprises the following steps: weighing raw materials based on the weight ratio; sequentially putting the PP, the compatilizer, the flame retardant, the hydrotalcite, the antioxidant and the lubricating-dispersing agent in a high-speed mixer, and mixing for 2-7 minutes; discharging; and placing the mixed raw materials in a double screw extruder, and carrying out extrusion and granulation at the temperature of 170-210 DEG C, wherein, the screw speed is maintained at 160-600RPM (revolutions per minute). Compared with the prior art, the obtained flame-retardant PP composite material has the advantages of good and stable flame-retardant effect, good glossiness, low specific gravity, good mechanical properties, simple processing technique, wide application range and high economic value.

The invention discloses an extraction method of soybean oil and belongs to the technical field of extraction and processing of plant oil. The extraction method comprises the following steps that: dehulled soybean pieces as a raw material are pretreated by a vacuum extrusion-expansion process and a superfine ball-grinding process to form a soybean product; the soybean product is mixed with water; a protease is added into the mixture obtained the previous step and undergoes an enzymolysis reaction with the mixture; and the reaction products are subjected to a centrifugal separation process and soybean oil is obtained. Parameters of the vacuum extrusion-expansion process comprise that a mould aperture size is in a range of 14 to 26 mm; a screw speed is in a range of 70 to 160 rotations per minute; a sleeve temperature is in a range of 75 to 120 DEG C; and a vacuum degree is in a range of -0.03 to -0.07 MPa. Parameters of the superfine ball-grinding process comprise that a ball-grinding time is in a range of 20 to 100 min; a ball-grinding speed is in a range of 100 to 220 rotations per minute, a material filling rate is in a range of 10 to 30%; and a medium filling rate is in a range of 10 to 30%. The extraction method has the advantages of simple used equipment, safe operation, good soybean oil product properties of no solvent residue and high nutritional values, and high total oil extraction rate reaching to about 97.48%.

The invention is a sinkable bulked granular river-crab feed and its making method, additionally arranging a variable-frequency speed regulator on the main electric machine of an ordinary screw squeezer to regulate the speed of the screw, combining with related control process conditions, making better waterproof sinkable bulked granular river-crab feed. According to the nutrition needs of the river crabs, it selects and compounds fish meal, soybean dregs, wheat and other raw materials, and makes it by the working procedures of micro-crushing, mixing, regulating quality, extruding, drying and cooling, etc and by the control of the conditions of crushed particle size, material water and temperature after quality-regulating, the screw speed of the squeezer, segment barrel temperature, etc. It has good waterproof property, high gelatination degree, very quickly absorbs water to turn soft after entering in water, suitable for the river crabs to ingest.

The present invention relates to a twin-screw extrusion processing treatment method for wheat bran and its twin-screw extruder. Said treatment method includes the following steps; thermal refining wheat bran; extruding treatment, adopting twin-screw extruder to treat thermal refined wheat bran, the draw ratio of screw rod is 15-30:1, compression ratio of twin-screw is 2-8:1, the rotating speed of screw rod is 150-500 rpm; rotary cutting; and pulverizing. Said invention can make the microorganism, biological enzyme and injurious insect eggs being in the wheat bran be completely killed and inactivated so as to make the wheat bran obtain further development and utilization.

A method for the improved extrusion of polyethylene polymers comprising passing polyethylene through a single stage, twin screw extruder comprising a solid polymer conveying zone, a polymer melting zone, a dispersive mixing zone, and a distributive mixing/pumping zone, in which the throughput and screw speed are optimized to reduce the number of gels present, ensure complete polymer melting within the polymer melting zone, and to minimize polymer degradation.

The invention discloses a method for producing a drawing protein by utilizing a compound vegetable protein containing peanut and soybean. The method comprises the following steps: mixing and tempering 73-85 parts of low-temperature degreased peanut protein powder, 5-15 parts of soy isolate protein, 1-15 parts of vital gluten and 1-15 parts of starch at the ratio of raw materials and then performing extruding tissue treatment under the conditions of extruding temperature of 60-160 DEG C, screw speed of 180-240r/min, feeding rate of 80-140g/min, cooling temperature of extruding mold of 62-75 DEG C and moisture content of materials in the extruding process of 50%-62%. High-moisture peanut drawing protein prepared according to the invention can overcome the difficulty in preparing the high-moisture drawing protein by taking peanut protein as the raw material; the acquired product requires no rehydration, has uniform and bright color and is free from bean flavor; compared with a tissue product taking a single protein as the raw material, the product has the advantage of rich nutrition.

The invention relates to a high-heat-resistant high-binding-force electroplating PC/ABS alloy material and a preparation method thereof. The PC/ABS alloy material comprises the following components by weight: 30-60 parts of PC resin, 20-50 parts of ABS gelatine powder, 15-35 parts of Alpha-SAN resin, 1-5 parts of a compatilizer, 0.1-1 part of an antioxidant and 0.1-1 part of a lubricant. The preparation method comprises the following steps: adding the PC resin, the ABS gelatine powder, the Alpha-SAN resin, the compatilizer, the antioxidant and the lubricant to a mixer for mixing by weight in the preparation process; feeding a prepared mixture from the main feeding opening of a extruder, controlling the temperature of a machine cylinder to be 220-270 DEG C, and controlling the screw speed to be 300-600 circles/minute, mixing and pelleting to obtain the PC/ABS alloy material. Compared with the prior art, the used Alpha-SAN resin modified by Alpha-vinyltoluene has the more excellent heat resistance, and is capable of effectively improving the heat-resisting level of the material under the situation without reducing the glue amount. The compatilizer is introduced for improving the compatility of the Alpha-SAN and PC phases, improving the dispersibility of the rubber, and improving the heat resistance and binding force performance of the material system advantageously.

The invention relates to a production method for a semi-humid porket feed belonging to the pig feed processing technical field. The invention is a general weaned piglets feed: the raw materials is dry powder feed and solid particle feed; after being crushed, sieved and weighed, fungicide and quantitative water are added in the raw materials, and then are blended with a water content of 25 percent to 55 percent; the semi-humid porket feed is made by extruding, refrigerating and packing the particles; when the extrusion method is used for the production, an extruder with a kneading area temperature of 80 DEG C to 150 DEG C, a cooling temperature of 50 DEGC to 100 DEG C, and an extrusion condition of the screw speed of 200 -1000r/min is adopted for producing the semi-humid porket feed with a starch gelatinization of 75 percent to 90 percent. Preservative with a certain concentration is added into the feed formula, so that the semi-humid porket feed will not mildew within 6 months.

The invention relates to the technical field of heat conducting plastic and provides a physical stripping graphene-plastic composite which comprises the following components in percentage by weight: 5-60% of heat conducting powder, 40-90% of plastic and 1-5% of auxiliary, wherein the heat conducting powder is physical stripping graphene which is mixed by a twin-screw extruder to prepare graphene-plastic composite masterbatch; the particle size of the graphene is 50-5000 meshes, the layer number of the graphene is 2-50, and the carbon content of the graphene is 85-99.8%. The invention also provides a preparation method of the composite, which comprises the following steps: drying the plastic masterbatch; setting the working temperature of the twin-screw extruder and the twin-screw speed; adding the graphene from an area I; adding a coupling agent from an area II; adding an antioxidant from an area III; and performing blending, extrusion and granulation. The physical stripping graphene-plastic composite and the preparation method thereof have the following beneficial effects: through physical stripping of graphene and plastic compounding preparation, the material has excellent heat conducting property and is reasonable in proportion, and the technology is simple and suitable for mass production and has a broad application prospect.

The invention relates to fully biodegradable bionic bait and a preparation method thereof and belongs to the field of a high polymer material. The fully biodegradable bionic bait is prepared from components in parts by weight as follows: 99-80 parts of polylactic acid, 1-20 parts of a flexibilizer, 0.01-10 parts of an activating agent, 0.05-2 parts of a catalyst, 0.1-5 parts of a nucleating agent, 0.01-5 parts of a phagostimulant, 0-3 parts of a pigment, 0-1 part of an antioxidant and 0-1 part of a lubricant. The preparation method comprises steps as follows: the uniformly mixed materials are added to a hopper of a double-screw extruder, a ratio of the injection volume of the flexibilizer to the weight of polylactic acid is controlled to be (1:99)-(20:80), the materials are subjected to melting extrusion, bracing, cooling, grain-sized dicing and drying, and modified polylactic acid particles are obtained; the modified polylactic acid particles are subjected to injection molding on an injection molding machine, and the fully biodegradable bionic bait in a required shape is obtained. The extrusion temperature of the double-screw extruder is 140-190 DEG C, a length-diameter ratio L/D of screws is (44:1)-(64:1), and the screw speed is 80 rpm-360 rpm; besides, the injection molding temperature of the injection molding machine is 130-200 DEG C, the injection molding pressure is 50-120 MPa, the pressure maintaining time is 5-300 s, and the mold temperature is 60-120 DEG C.