378results about How to "Increase extrusion speed" patented technology

An optical insulated core with a coated optical fiber (2) shows a core jacket (4) with a core jacket material containing polyvinylchloride (41) which is applied to the coating of the optical fiber. It contains a solid component (42) distributed within the core jacket material, which produces a mechanical separation effect against the coating of the optical fiber. The solid component (42) is mixed and distributed into the core jacket material during a compounding process. Thus the core jacket can be removed from the coating of the optical fiber in a simple way.

The invention discloses a method for preparing a high-performance polymer pipe. The method adopts the steps that during the extrusion molding process of the pipe, the crystallization, the orientation or the dispersed phase morphological structure of the polymer pipe can be adjusted, controlled and fixed through the shearing action generated by the rotation of a core rod in a machine head relative to an orifice die, or the rotation of the orifice die in the machine head relative to the core rod, or the rotation of the core rod and the orifice die in the identical or opposite direction simultaneously, and by cooling and shaping the inner wall and the outer wall of the extruded pipe simultaneously, and adjusting and controlling the temperature field, the cooling rate and the temperature gradient during the extrusion molding process of the pipe. The invention further discloses a device designed according to the method. The method has the advantages that the macromolecular orientation, the crystallization or the dispersed phase morphological structure which are generated through induction can be retained in the plastic pipe, so that deorientation can be avoided, the internal stress of the pipe can be reduced, and the performance of the pipe is improved.

The present invention provides a preparation process of wood-plastic composite material, and features that polyolefin and wood powder as main material and ionic polymer as compatilizer accounting for 5-10 wt% of the mixed material are mixed in a high speed mixer for 20-40 min at the temperature lower than 100 deg.c, and the mixture is then formed through extrusion or mold injection. Compared with available technology, the product has the advantages of high hardness, high strength, smooth surface, etc. and may be used widely in door and window, floor, wall, etc.

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.

A flame-retardant thermoplastic elastomer compound is disclosed having polyphenylene ether, a hydrogenated styrene block copolymer, at least one solid non-halogenated phosphorus containing flame retardant, and a nucleated olefinic polymer. The compound has a before-aging tensile elongation of >200% and an after-aging tensile elongation residual of at least 75%, according to the UL 62 test, which makes it useful as an insulation layer, a jacketing layer, or both for protected electrical lines such as alternating current wire and cable products, accessory cables, and variety of injection molded electrical or electronic parts.

The invention provides a silane cross-linked polyethylene insulating material composition, which comprises a material A and a material B, wherein the material A is composed of the following components in parts by weight: 100 parts of polyethylene, 0.01-1 parts of initiator, 0.2-5 parts of silane cross-linking agent, and 0.1-0.5 parts of antioxidant; the material B is composed of the following components in parts by weight: 100 parts of polyethylene, 0.5-5 parts of catalyst, 0.01-5 parts of processing aid, and 0.1-0.5 parts of antioxidant; and the material A is mixed and extruded by a reciprocating single-screw extruder.

The invention discloses a noodle processing machine. The noodle processing machine comprises a shell (1), wherein a driving device (2) capable of rotating forward and reversely is arranged in the shell (1); the shell (1) comprises an outer shell (1-1) in which the driving device (2) is arranged and a stirring chamber (1-2) for mixing noodles; a stirring and extruding device (3) which is connected with the driving device (2) and used for stirring the mixed noodles and extruding the mixed paste is arranged in the stirring chamber (1-2); a blade assembly (4) is arranged at the front end of the stirring chamber (1-2); a holder (5) is arranged in the outer shell (1-1) and at one end of the outer shell (1-1), opposite to the blade assembly (4), and comprises a fixing plate (5-1) for fixing the driving device (2); a group of tensioning bolts (5-2) are arranged between the fixing plate (5-1) and the blade assembly (4).

The invention discloses a hot-top casting process for casting a large-diameter hard aluminium alloy round rod by using a wiping disc. The process comprises the following steps of: a, batching; b, melting; and c, casting, wherein the casting step is a key process. The process protected by the invention is a casting process of a largest-diameter hard aluminium alloy which is put into operation in the country currently. Namely, the process comprises: hot-top casting equipment is used; the wiping disc is configured at the same time; step type casting process parameters are adopted; the suspension height of the wiping disc and the three casting process parameters are searched; and finally, the best casting process of the 7075 aluminium alloy round rod with a diameter of phi582 mm is established. According to the process disclosed by the invention, the crack tendency in the process of casting the large-diameter hard aluminium alloy can be greatly reduced without the bottoming process; the cast round bar has good grain size, thin coarse grain layer and good surface quality; and the turning quantity on the cast rod before extruding is reduced, therefore, the production cost is reduced, and the yield is increased.

The invention relates to a high-molecular-weight polymer nucleating agent-modified ultrahigh-molecular-weight polyethylene blend material. The blend material comprises the following raw materials by weight: 60 to 100 parts of UHMWPE, 5 to 12 parts of HDPE, 6 to 16 parts of LLDPE, 0.1 to 3 parts of a high-molecular-weight polymer nucleating agent and 1.5 to 3 parts of a flow modifier. The high-molecular-weight polymer nucleating agent has the advantages of no odor, good dispersibility, good compatibility, capacity of realizing heterogeneous crystallization, a high degree of crystallization and a small application amount; the high-molecular-weight polymer nucleating agent-modified ultrahigh-molecular-weight polyethylene blend material retains original characteristics of polyethylene UHMWPE and has obviously improved tensile strength, impact strength, bending strength, Vicat softening temperature, elongation at break and Shore hardness and a reduced mortar wear rate.

The invention discloses a 125-degree irradiation-crosslinked elastomer cable material used for a new energy automobile high-voltage cable. The elastomer cable material is manufactured from an elastomer resin, a softening plasticizer, a processing modified resin, an oil-resistant modified resin, oil-resistant modified elastomer, a compatilizer, a fire retardant, a flame-retardant synergistic agent, an anti-oxidant, a crosslinking auxiliary agent and a lubricant. The invention further discloses a manufacture method of the elastomer cable material. After irradiation crosslinking, an electric wire and cable product made from the cable material is good in physical and mechanical properties, electrical insulation property, flame resistance and thermal resistance and can meet the oil resistance requirement in the ISO6722 Standard. The elastomer cable material is high in production efficiency and can be widely applied to the new energy field of a high-voltage connection cable used in an electric automobile.

The invention discloses Al-Mg-Si-Cu alloy and a preparation method thereof. The alloy consists of the following components in percentage by mass: 0.4 to 0.6 percent of Mg, 0.45 to 0.6 percent of Si, 0.3 to 0.8 percent of Cu, 0.1 to 0.2 percent of Mn, 0.1 to 0.7 percent of Zn, 0 to 0.1 percent of Cr, 0.01 to 0.02 percent of Ti, not more than 0.3 percent of Fe, not more than 0.1 percent of other impurities (total content), and the balance of Al. The alloy has the characteristics of the reduction of deformation resistance, improves extrusion speed and production efficiency, and can improve the yield under the condition of constant productivity. In addition, the alloy does not need an extra water quenching process, and can reduce investment cost of equipment by on-line air quenching after hot extrusion.

The invention discloses a high-quality 6-series aluminum alloy extrusion casting blank and a preparation method thereof. The preparation method comprises the following steps of performing primary cooling treatment, bath treatment and subsequent cooling treatment on a 6-series aluminum alloy ingot subjected to homogenization heat treatment in sequence. Compared with a traditional uniform casting blank in actual production, the prepared casting blank has the advantages that a large number of dispersed micron-sized precipitated phases are distributed in a matrix, the structure can not only effectively reduce the extrusion deformation resistance of a cast ingot, improve the surface quality of an extruded product, but also improve the online quenching solid solubility of the extruded product, so that a good tissue basis is provided for later aging treatment. Finally, the high-quality extrusion casting blank capable of improving the extrusion performance and improving the final aging strength is finally obtained.

The quick forming and screw extruding jet device for thermoplastic particle material belongs to the field of fast forming and smelting extrusion stacking technology in mechanical processing. The device includes push rod feeding mechanism, reducing worm gear transmission mechanism, micro extruding screw jet mechanism and temperature controlling heating mechanism. The push rod feeding mechanism consists of electromagnet, push rod and switching joint, and realizes the intermittent feeding of particle material via the reciprocation of the push rod notch between the material bin and material barrel. The present invention is a ideal smelting, extruding, stacking and forming jet device with effectively lowered cost, raised processing speed and less flow casting.

A weather strip includes a trim body having a generally U-shaped cross section, a hollow seal portion that protrudes from an outside surface of the trim body, and a holding lip formed on the trim body so as to extend from an inside surface of the trim body toward the inside of the trim body. The weather strip is mounted on the vehicle body such that the trim body is held by a flange provided at a periphery of a door opening of a motor vehicle. The weather strip is formed by extrusion molding such that the length of the holding lip is changed in a stepped manner in accordance with the thickness of the flange.

The invention relates to a seal ring rubber material and a mixing method thereof. The mixing method comprises the following steps: carrying out crude rubber laminating and roller covering: adding 1-1.5 parts of aflux-42 serving as a processing agent and 1.5-2 parts of TM-80 serving as a mould release agent into 100 parts of fluororubber serving as crude rubber; mixing the above components of the rubber material for about 1 minute at the roller temperature of 40-45 DEG C, and adding 4-6 parts of activated magnesia serving as an acceptor; evenly mixing, adding 30-40 parts of a reinforcing agent which contains aramid pulp fiber; evenly mixing once again, adding 1-1.5 parts of bisphenol AF serving as a vulcanizing agent and 1-0.5 part of tert-butyl peroxypivalate (BPP) serving as an accelerator; and finally adding 5-7 parts of calcium hydroxide, packaging into a cornucopla for three or four times after all compounding ingredients are consumed up under the roller temperature of below 55 DEG C, adjusting the roller distance to be less than 0.55mm, rolling the dropped rubber for five or six times, and discharging. The seal ring rubber material has the advantages of rapid vulcanization speed of fluororubber, high production efficiency and low rejection rate.

The invention provides a halogen-free flame retardant polyethylene composite material, which is characterized by consisting of the following raw materials in weight portion: 74.3 to 41.5 portions of polyethylene; 0.2 to 1.5 portions of heat stabilizer; 0.3 to 1 portion of light stabilizer; 0.2 to 1 portion of processing aid; 23 to 50 portions of halogen-free flame retardant; and 2 to 5 portions of nanometer addition agent. The invention also provides a method for preparing the composite material. Compared with the prior halogen-free flame retardant polyethylene, the composite material greatly improves the flame retardant performance of polyethylene due to the addition of the nanometer addition agent, and reduces the usage of the halogen-free flame retardant; besides, the obtained polyethylene has better mechanical properties, smoother surface and faster extrusion.

The invention relates to a rare earth aluminium alloy material with high strength and high toughness and the preparation method thereof, belonging to the technical field of metal alloy and the preparation thereof. The invention is characterized in that the invention comprises Mg, Si, Fe, a rare earth compound additive and Al, with the weight percentages as follows: Mg: 0.50-0.60%; Si: 0.35-0.45%; Fe less than or equal to 0.35%; rare earth additive less than or equal to 0.065-0.2%; the margin being Al. The preparation method comprises charging and melting down the 6063 aluminum alloy furnace materials in accordance with the conventional methods, adjusting the furnace temperature, deairing, refining and purifying the melt and then adding Al-RE, Al-Sr and Al-Zr master alloys at the temperature between 720 DEG C and 760 DEG C and preserving heat for 30min-7h, then carrying out homogenization treatment on electromagnetic stirring components and detection, pouring and casting, finally carrying out homogenization treatment and subsequent quick cooling treatment, rapid heating before extrusion, extrusion and on-line quenching treatment as well as artificial aging treatment. The product section obtained from the invention has rapid extrusion and high mechanical property of the section and can improve the apparent mass of the section and increase the modification of oxide film density.

The invention provides a fluoropolymer processing aid. The fluoropolymer processing aid is particles which are formed by a core part and a shell part and have average particle diameter of 0.2 to 1 micron, wherein the core part is made of fluorocarbon polymer, the shell part is made of MQ silicon resin, the ratio of M to Q is 0.5 to 0.9, and the weight ratio of the core part to the shell part is 20:80-45:55. The invention also provides a silane cross-linked polyethylene composition containing the processing aid and application of the fluoropolymer processing aid in silane cross-linked polyethylene extrusion molding. Not only the silane cross-linked polyethylene added with the fluoropolymer processing aid has high extrusion velocity, but also the extruded product has high surface finishment.