76results about How to "Uniform vulcanization" patented technology

The invention relates to a color rubber and plastic heat-insulating material and a preparation method thereof. The rubber and plastic heat-insulating material is prepared from polrvinyl chloride paste resin, dinitrosopentamethylene tetraamine, an antiager, styrene rubber, protective wax, an antioxidant, chlorosulfonated polyethylene rubber, diphenyl guanidine, mercaptobenzothiazole, zinc dibutyl dithiocarbamate, zinc diethydithiocarbamate and the like. The performance and the color difference of the product are stabilized by adding a coloring material to perform banburying on the finished rubber again and combining a new vulcanizing foaming technology and a super-long water-cooling system; the prepared color rubber and plastic heat-insulating material does not have fibers and dust, prevents dew formation, has a smooth surface and high cleanliness, has the same bright color as equipment, is environmentally-friendly and non-toxic, reduces secondary construction, saves cost, greatly improves the using performance of the product, prolongs the service life and takes full advantage of the product performance.

This invention discloses a hydrogenation catalyst pre-curing method. The method used the by-products of the oil and gas industry processing acidic gas as medium sulfide, pretreatment the hydrogenation catalyst, the main component of acid gas is hydrogen sulfide and carbon dioxide, the invention can be used inside or outside of pre-vulcanization mode, put the oxidation states catalyst into vulcanization reactor, heated to200-500degree centigrade in an inert atmosphere, and then conducted hydrogen and acid gas to sulphate under 0.1-10MPa pressure, the reaction time is 0.5 to 30 hours, of which an acid gas occupy 1-40%. The invention method not only overcome the presence of sulfide wet curing agent losses, metal tube surface corrosion defects, also have fast curing process, even curing, can greatly improve the activity and stability of catalysts, extended catalyst life and other advantages, and wide sulfide-media sources, easy to get, significantly lower sulfide cost.

The invention relates to a tire altering outer temperature vulcanization technique. Vulcanization is carried out in a capsule according to conventional technique in optimum cure period; the steam temperature outside a tire is controlled in two or three different temperature periods: the initial outer temperature is higher, namely, 138-150 DEG C, and is kept within 120-500 minutes; or the initial outer temperature is 138-143 DEG C and is kept within 120-300 minutes; the temperature gradually falls in the later period to 125-137 DEG C and is kept within 60-360 minutes; or the temperature falls to 132-137 DEG C and is kept within 120-240 minutes; if the temperature difference in each period is 2-10 DEG C, the altering temperature time is 1-10 minutes; if the temperature difference in each period is 3-5 DEG C, the altering temperature time is 1-3 minutes. The temperature of optimum cure in initial period is higher, so that the temperature outside the tire is increased faster, and the vulcanizing time is shortened. The deep part of the tire is affected slightly after the temperature is decreased, and can be vulcanized continuously. The technique ensures full internal tire vulcanization, avoids or reduces over vulcanization outside the tire, therefore, the technology is applicable to large-tire vulcanization, ensures the quality of the tire, decreases the steam temperature of outer temperature, shortens the use time and reduces energy consumption.

The invention relates to equipment for preparing nanometer metal powder. The equipment comprises a feeding system, a preheating system, a pre-reduction system, a deep reduction system, a cooing system and a passivating device which are connected in sequence, wherein the preheating system is connected with a combustion chamber providing heat, and the combustion chamber is connected with the pre-reduction system and the deep reduction system; the pre-reduction system comprises a first fluidized bed reduction furnace for carrying out a pre-reduction reaction; the deep reduction system comprises a second fluidized bed reduction furnace for carrying out a deep reduction reaction; an internal cavity of the fluidizing section of the first fluidized bed reduction furnace and the second fluidized bed reduction furnace comprises a constant diameter section and a circular truncated cone-shaped diameter-reducing section, and the inner diameter of the lower part of the circular truncated cone-shaped diameter-reducing section is gradually reduced, and the taper angle of the circular truncated cone-shaped diameter-reducing section is smaller than or equal to 30 degrees. By using the equipment for preparing nanometer metal powder provided by the invention, the purity is 99% or above, and the grain diameter is uniform.

The invention discloses a flame-retardant sealing ring for motors of range hoods. The flame-retardant sealing ring is made from raw materials including nitrile rubber, zinc oxide, stearic acid, carbon black, white carbon black, sulphur powder, an accelerant CZ, an accelerant M, an accelerant TMTD, ETU-80, light magnesium oxide, pottery clay, chloroprene rubber adhesive, aluminum hydroxide, a silane coupling agent, zinc borate, antimonous oxide, modified flame retardant, dioctyl phthalate, carnauba wax, antiager 2246, antiager BZ and a processing agent WB-16. The flame-retardant sealing ring is good in high-temperature resistance and flame retardant performance, and meanwhile has the advantages of oil resistance, no halogen, low toxicity and environment friendliness.

The invention discloses a coating rubber roller for a high-grade automobile plate production line and a manufacturing method thereof, belonging to the field of rubber rollers and preparation methods thereof. The rubber for the rubber roller comprises the following components in percentage by weight: 50.7-58.1% of ethylene-propylene rubber, 29.1-38.1% of carbon black, 2.5-2.9% of naphthenic oil, 2.5-2.9% of ester oligomer, 2.5-2.9% of tackifier, 1.0-1.2% of flow promoter, 1.9-2.2% of vulcanizing agent DCP, 0.28-0.32% of sulfur, 0.18-0.20% of accelerator BZ and 0.18-0.20% of accelerator DPTT. The method comprises the following steps: compounding the rubber; winding and rubberizing; vulcanizing in a vulcanizer; and carrying out lathe grinding. In the rubber compounding process, the materials can be sufficiently dispersed and fused. the rubberizing grain color difference on the roller surface can be eliminated, the consistency of internal and external hardness of the rubber roller is high, and the material distribution consistency and roller surface roughness consistency are high, thereby satisfies the operational requirements for the coating rubber roller for a high-grade automobile plate production line.

The invention discloses a rapid vulcanization die for a building lamination shock insulation rubber bearing. The rapid vulcanization die comprises an inner heating die with a heat conduction strip, an outer heating die with a heat conduction strip, an excessive glue groove, heat conduction strips, an upper heating template, a lower heating template, a positioning shaft, a positioning hole and a positioning shaft mounting groove, wherein the lower heating template is mounted on a support, the outer heating die with the heat conduction strip is arranged on the upper surface of the lower heating template, the inner heating die with the heat conduction strip is arranged in the center of the outer heating die with the heat conduction strip, the height of the outer heating die with the heat conduction strip is equal to that of the inner heating die with the heat conduction strip, and the upper heating template is arranged at the tops of the outer heating die with the heat conduction strip and the inner heating die with the heat conduction strip. The rapid vulcanization die fully utilizes the structural principle of vulcanization equipment and a vulcanization target to realize rapid and uniform vulcanization and efficient mounting, is applicable to vulcanization processing of various rubber bearings, such as a standard rubber bearing, a pencil lead rubber bearing, a high damping rubber bearing and a stacked rubber bearing, and is high in vulcanization efficiency and rapid and convenient to mount and maintain.

The invention discloses a short fiber-reinforced high temperature-resistant rubber roll, a rubber roll rubber material and preparation methods thereof, and belongs to the technical field of rubber rolls. The rubber roll rubber material comprises the following components in parts by weight: 100 parts of ethylene propylene rubber, 50-80 parts of rapidly-extruded carbon black, 10-20 parts of a plasticizer, 3-5 parts of nanometer active zinc oxide, 2-6 parts of an anti-aging agent, 6-10 parts of a crosslinking agent, 2-10 parts of an assistant crosslinking agent, 3-8 parts of tackifying resin, 2-5 parts of a dispersing flowable agent and 2-10 parts of short fiber. The preparation method of the rubber roll comprises the following steps: preparing the rubber material, wrapping with the rubber material, vulcanizing in a vulcanizing tank, and turning. The rubber material is high in strength, rebound resilience, and resistance to high temperature and low in permanent compression deformation; the rubber roll made of the rubber material is high in resistance to high temperature and acid and alkali corrosion; the rubber roll is highly consistent in inside and outside hardness and material distribution and high in roller surface machining precision; the service life of the rubber roll is twice of or longer than that of the conventional high temperature-resistant rubber roll, so that the service life of the rubber roll is greatly prolonged.

The invention relates to a production process of a radial tire. And an internal mixing operation comprises the steps of: reducing the rotating speed of an internal mixer when a rubber compound is mixed to a temperature of 140-160DEG C, maintaining the rubber compound at a temperature ranging from 140DEG C to 160DEG C for 70-90 seconds, during which a feeding door is opened for 15-25 seconds to discharge water vapor from the internal mixer; during a molding operation, an inside liner and a carcass shape up in the first molding stage; and during a sulfuration operation, the internal pressure iscontrolled in a range of from 2.9MPa to 3.1MPa, the inner temperature is maintained in a range of from 145DEG C to 151 DEG C, and the outer temperature is maintained in a range of from 136DEG C to 140 DEG C. The process of the invention can ensure well mixed rubber compound, uniform steel cord, tight carcass joint and uniform sulfuration, and the product obtained has high physical properties. Therefore, the production process of the invention satisfies the production requirements of giant engineering machinery radial tires.

A self-lubricating fluorinated silicone rubber seal ring relates to the technical field of seal rings, and is characterized by comprising fluorinated silicone rubber, and a PTFE (Polytetrafluoroethylene) thin film arranged on the surface layer of the fluorinated silicone rubber. The invention further provides a production method of the fluorinated silicone rubber seal ring. The production method is characterized by comprising the following steps: injection molding, bonding, hot-forming, cutting and punching. The self-lubricating fluorinated silicone rubber seal ring has the excellent properties of abrasion resistance, pressure resistance and the like, and can be used in complex or bad environments requiring relatively high requirements. The production method has the advantages that the problem of difficulty in bonding polytetrafluoroethylene with fluorinated silicone rubber is solved; the production speed is fast; the machining quality is high.

The invention discloses an energy-saving heating plate of a tire vulcanizing machine. The energy-saving heating plate of the tire vulcanizing machine comprises a heating plate body, wherein a plurality of linear holes which are recessed towards the center of a circle of the heating plate body are formed in an outer ring wall of the heating plate body; and a heating tube is inserted in each linear hole. Compared with a heating plate of a tire vulcanizing machine in a steam heating mode in the prior art, the electrothermic heating plate of the tire vulcanizing machine has the advantages that the sector heating temperature can be balanced, temperature equilibrium is maintained, the heating plate body of the tire vulcanizing machine can be heated uniformly, tire vulcanizing is uniform, meanwhile, the heat degree of the heating plate body of the tire vulcanizing machine is controlled conveniently, workmanship is simple, sealing is not required, the cost is low, a steamer is not required, and therefore, the energy-saving heating plate of the tire vulcanizing machine is energy-saving and environmentally friendly.

The invention provides rubber-plastic mixed composition, a dynamically vulcanized thermoplastic elastomer and a preparation method thereof. The dynamically vulcanized thermoplastic elastomer is prepared by dynamically vulcanizing ethylene-propylene-diene monomer rubber, poly-4-methylpentene-1 and a cross-linking system by adopting an internal mixing process. The thermoplastic elastomer is high in strength, excellent in high-temperature resistance, small in permanent deformation and good in elasticity; the high-temperature resistance of the thermoplastic elastomer prepared by adopting the method cannot be matched by that of a thermoplastic elastomer prepared by other methods.

The invention relates to an ex-situ presulfiding method of hyrorefining catalysts. The method comprises the following steps: heating plant oil to reach a certain temperature, then slowly adding powdery sulphur according to a certain proportion to generate deep black sulphurized oil; adding the hyrorefining catalysts in the deep black sulphurized oil according to a certain proportion, uniformly mixing and then putting in a reaction kettle, heating and activating under a certain pressure and temperature, cooling to the room temperature to finish the ex-situ presulfuration of hydrogenation refined catalysts. The invention breaks through the traditional sulfuration method of catalysts, has uniform sulfuration, reduces the coke formation, improves the sulfurization degree, enables the activation and the stability of the catalysts to be obviously improved, is stably stored in the air, convenient to transport and store, simple to operate and easy to implement, greatly lowers the industrial hydrogenation cost and can obviously lower the sulfuration cost compared with the traditional sulfuration method.

The invention discloses an explosion-proof tire which comprises a tire body composed of a tread, a tire body, a buffer layer and a tire bead, wherein the tread is a rubber composition prepared by taking rubber as a matrix and adding with auxiliary materials such as a reinforcing filler, an accelerant, a vulcanizing agent, a vulcanization accelerator and an adhesion promoter; an explosion-proof layer made from high polymer explosion-proof materials is sprayed on the surface of the tread; a plurality of capsule cavities are formed in the tread and filled with leak-repairing glue. With the adoption of a manner of combining the explosion-proof layer, the capsule space and the tread rubber, the explosion-proof layer is sprayed on the surface of the tread, so that the elasticity of the tread surface is increased, and the acting force of a sharp object on the tread rubber is relieved; and moreover, the capsule cavities are formed in the tread rubber, when the sharp object pierces the capsule cavities to reach the tire body, the leak-repairing glue in the capsule cavities reacts with air so as to perform curing, and the condition that running safety is threatened by leakage of high-pressure gas in the inner liner is avoided.

The invention discloses a method and a device for hot pressing and vulcanization integration of a natural fiber elastic material. The method is characterized in that natural fiber yarns are prepared to obtain fiber sheets, the fiber sheets are superposed and then are hot-pressed in a closed thermal insulation chamber, and hot air is introduced into the thermal insulation chamber to perform vulcanization treatment on the fiber sheets at the same time. The method combines the prior hot pressing and vulcanization working procedures together, shortens production procedures and time, reduces thermal energy consumption, and reduces production cost. The method realizes the one-step shaping of the fiber elastic material through the synchronous performance of the hot pressing and the vulcanization, thereby greatly reducing the shaping deviation of the fiber elastic material and greatly improving the qualification rate of products; and at the same time, the method realizes the synchronous vulcanization treatment of the inside and the surface, ensures that the fiber elastic material has balanced and complete whole vulcanization, and greatly promotes the service performance of the fiber elastic material.

The invention relates to a high-efficiency heating solid tire vulcanization device which comprises an upper die and a lower die, wherein a die cavity of the upper die forms a die cavity for a half of the outer surface of a solid tire; an upper heating medium heating cavity is at least arranged in the upper die along a tire tread; a lower steel ring is arranged on the right side of the lower die and comprises an annular part; the annular part is arranged on the right side of an inner ring of the lower die; a die cavity is arranged on the left side of the inner ring of the lower die; the die cavity of the lower die and the inner surface of the lower steel ring form a die cavity for the other half of the outer surface of the solid tire; a lower heating medium heating cavity is at least arranged in the lower die along the tire tread; the upper die and the lower die are respectively fixed on a vulcanization device pressing plate; and heat isolation layers are respectively arranged between the upper die and the vulcanization device pressing plate and between the lower die and the vulcanization device pressing plate. By the high-efficiency heating solid tire vulcanization device, the heat energy utilization rate, the production efficiency and the vulcanization uniformity are improved, and thus the overall quality of products is improved.

The invention relates to giant all-steel OTR radial tire nozzle-type hot-water circulation vulcanization equipment and a vulcanization technology. The equipment comprises a vulcanization die and a water inlet pipe arranged on the vulcanization die. The vulcanization die is provided with a capsule, inside which a nozzle tube communicated with the water inlet pipe is arranged.

The invention relates to a rubber sealing ring used for a GIS composite apparatus and a preparation method thereof. The rubber sealing ring is produced by steps of plasticating, banburying and mixing on the following raw materials in parts by weight: 100 parts of ethylene-propylene-diene monomer, 3-5 parts of zinc oxide, 1-2 parts of stearic acid, 20-25 parts of high-wear resistant carbon black, 30-35 parts of spray carbon black, 6-8 parts of dioctyl sebacate, 0.5-1 part of an antioxidant MB, and 2-3 parts of a vulcanizing agent BIPB. The product has extremely low permanent compression set value, the actual measurement value is 10%, which is lower than the requirement of less than or equal to 25% in JB/T7052-1993, longer life is guaranteed; the brittleness is abnormal at the temperature of -60 DEG C, so that the usage performance and life of the product at low temperature are guaranteed; the product is tolerable 40% of hydrofluoric acid for 48 hours and the performance has no change; and the aged life assessment of the sealing ring can reach as high as 55.6 years.

The invention discloses a rubber vulcanizing device for a cable production line, and relates to the field of cable production. The rubber vulcanizing device aims at solving the existing problem of lowvulcanizing efficiency during cable production. According to the the following scheme, the rubber vulcanizing device comprises an inner cylinder, an outer cylinder and a supporting column, the outercylinder and the inner cylinder are arranged in a through mode, the inner cylinder is arranged in the outer cylinder in a rotating mode, the supporting column is fixedly arranged at the bottom end ofthe outer cylinder, a driving motor is fixedly arranged at the top end of the outer cylinder, an output shaft of the driving motor is fixedly connected with a rotating rod, the circumferential side wall of the rotating rod is fixedly sleeved with a main gear disc, a driving gear is fixedly connected to the end part of the rotating rod, the outer wall of the inner cylinder is fixedly sleeved with an auxiliary gear disc, the main gear disc meshes with the auxiliary gear disc, and air guide pipes are uniformly distributed in the inner cylinder. The cable vulcanizing device has the advantages thatthe structure is novel, uniform vulcanizing operation can be carried out on a cable, meanwhile, the vulcanized cable can be effectively wound up, and the device is suitable for popularization and application.