37results about How to "Aids in demoulding" patented technology

The invention discloses a white carbon black dispersant for rubber. The white carbon black dispersant is characterized by comprising the following raw materials in parts by weight: 30-70 parts of fatty acyl amide/acid amide, 10-30 parts of fatty acid ester and 0-30 parts of fatty acid soap salt. The invention also discloses a preparation method of the white carbon black dispersant. The preparation method is simple and rapid; and the obtained white carbon black dispersant has multiple functions such as dispersion, lubrication and chemical modification, can be used for improving the processing safety performance as well as physical and mechanical properties of a rubber material and increasing the curing speed of the rubber material and is remarkable in effect.

The invention discloses a preparation method of a Ti3SiC2/SiC functionally gradient material, comprising the steps of mixing Ti3SiC2 powder and SiC powder in a die layer by layer in a gradient way, then preparing a blank, performing vacuum hot-pressing sintering on the blank to obtain a green body, and sequentially performing dipping densification and pyrolysis treatment on the green body; the SiC powder comprises micron beta-SiC powder and nanometer beta-SiC powder; the vacuum hot-pressing sintering temperature is 1600-1700 DEG C, and is kept for 3-5h, and the maximum pressure is 25MPa; the dipping densification comprises performing dipping densification on gradient layers containing 60-100 vol. percent of SiC in the green body subjected to the hot-pressing sintering in polycarbosilane liquid. The Ti3SiC2/SiC functionally gradient material prepared by the method is high in compactness, contains multiple gradient layers along the thickness direction from Ti3SiC2 to SiC (designing can be performed as required), the structure is uniform and compact in each gradient layer, interfaces among the gradient layers are moderately combined, the mechanical strength is high, the breaking tenacity is good, under high temperature, the oxidation resistance and the thermal shock resistance are good, and the Ti3SiC2/SiC functionally gradient material having 11 gradient layers and the thickness of 8-15mm can be prepared.

A diatomaceous earth breathing brick with a high humidifying harm-reduction function and a production method thereof are disclosed, through improvement of a formula, slurry with excellent performances can be prepared, a molding material is prepared by a spray granulation process, and the molding problem is overcome. The formula comprises, (wt%), 80%-90% of diatomaceous earth; 4%-14% of clay; 0.5%-1.5% of talc; 0.5%-1% of a ceramic body enhancer; 1%-2% of a ceramic sintering aid agent; 0.5%-1% of a superplasticizer; 0.5%-1.5% of nano titanium dioxide and 0.5%-1.5% of tourmaline powder. The production method is as follows: the raw materials are prepared into the slurry by adding of water, and by spray granulation, material distribution, molding and firing, the diatomaceous earth breathing brick with the high humidifying harm-reduction function is obtained. Compared with the prior art, the formula and the molding process are improved, the use amount of the diatomaceous earth is significantly increased, body cracking, deformation, stratification and other phenomena caused by inappropriate moisture content of raw materials, uneven material distribution and excessive local stress of a green body can be avoided, and the diatomaceous earth breathing brick has a higher humidifying harm-reduction function.

The invention relates to a preparation technology of fair-faced concrete and a preparation method of a special admixture. The fair-faced concrete is prepared from the following components: water, cement, fly ash, mineral powder, medium sand, gravels, a dispersing agent, a defoaming agent, an air entraining agent and a water reducing agent. The fair-faced concrete has good apparent effects; by utilizing molding effects of the concrete, a decorative effect can be realized, and secondary finishing and decorating of partial molded concrete are eliminated; the fair-faced concrete is often used as decorative concrete and has the characteristics of small color difference and the like; the cured and molded concrete has the advantages of no obvious color difference in surface color and unique texture; the fair-faced concrete has the advantages of flat and smooth surface, uniform color, angular property, no damage or pollution, good environmental affinity and close to nature when being used forengineering construction.

The invention provides an electrified sintering die which comprises an internal movable block forming die and an outer die sleeve arranged from inside to outside and further comprises an upper pressure head and a lower pressure head arranged in the internal movable block forming die, wherein a counterbore hole is formed in the outer die sleeve; a shunting flow deflector is arranged in the counterbore hole; and the inner wall of the outer die sleeve or the outer wall of the internal movable block forming die is coated with a release agent. The electrified sintering die can improve the uniformity of a sintering temperature field and reduces the demoulding difficulty of a sintered sample to improve the sintering uniformity of the sample and the integrity of the sintered sample.

The invention discloses a flame-retardant polypropylene material as well as a preparation method and application thereof. The flame-retardant polypropylene material is prepared from the following rawmaterials in terms of 100 parts by mass: 72-85 parts of copolymerization polypropylene resin, 8-15 parts of brominated flame retardant-antioxidant 1010 compound, 3-6 parts of antimonic flame retardant, 1-3 parts of titanium dioxide, 0.5-1.2 parts of lubricant, 1-2 parts of antistatic agent, 0.5-1.2 parts of antioxidant and 0.3-1 part of antibacterial agent. The flame-retardant polypropylene has agood antistatic effect, has a surface resistance of 108-109 omegas, is high in glossiness, does not produce flame retardant precipitate, has a flame retardant rating of UL94V-0, and has the advantagesof being capable of inhibiting bacterial growth for a long time, being good in antibacterial effect and the like. The preparation method is simple and efficient, easily guarantees flame retardance and high-brightness white color of the material, and is high in production efficiency.

The invention relates to a coating agent, which comprises the following components by weight portion: 100 portions of calcium fluoride, 0.7 to 3.3 portions of boric acid, and 5.5 to 11 portions of adhesive. The coating agent is used for protecting a processing tool during production of low-melting point alloys, and has the advantages of low cost and good protecting effect.

The invention discloses a preparation method of a novel rubber additive. The novel rubber additive is prepared from the following components in parts by weight: 20-30 parts of vinyl resin, 18-25 parts of unsaturated polyester resin, 12-16 parts of unsaturated fatty acid, 1.5-2 parts of zinc oxide and 6-9 parts of trifluoropropyl methyl dichlorosilane. The preparation method comprises the steps of adding unsaturated fatty acid into a container, heating to the temperature of 80-90 DEG C for melting, stirring, then adding zinc oxide, raising the temperature to 120-130 DEG C, and reacting for 2-3 hours to obtain viscous liquid; and adding the viscous liquid obtained in the step S1 into vinyl resin, unsaturated polyester resin and trifluoropropyl methyl dichlorosilane, raising the temperature to 110-115 DEG C, and carrying out melt blending for 3-5 hours to obtain the additive.

The invention discloses a die stock which comprises a stock body used for accommodating and fixing screw dies, wherein symmetrical outward extending handlebars are arranged on the stock body. According to weight percentage, the stock body is composed of components as follows: 1-4% of Cu, 0.6-0.9% of C, 0.1-0.3% of S, other impurities occupying smaller than or equal to 2%, and the balance Fe. The invention further discloses a warm compaction process of the die stock. The warm compaction process is characterized in that in the sintering procedure, a heating part is divided into three heating zones in a gradual warming heating mode, and therefore volatilizing of super lubricants added in a material mixing procedure is benefited, cracking and surface bulging of laminates in the forging process are effectively avoided, the quality of warm compaction products is improved, and inside-to-outside hardness and use intensity of the warm compaction products are improved due to the gradual warming mode.

The invention relates to the technical field of sponge processing, in particular to a sponge processing device. The sponge processing device comprises a foaming box which is internally provided with awavy floating plate, the foaming box is divided by the floating plate into an upper foaming cavity and a lower cavity, connecting mechanisms are arranged at the side walls of the floating plate, andsliding plates are arranged in a sliding mode on the side walls of the foaming box. A clamping portion, which is able to be connected to the corresponding connecting mechanism, is arranged at one endof each sliding plate, the other end of each sliding plate is connected to the foaming box by a spring, a water storage box is arranged in a sliding mode above the foaming box, a hollow rectangular frame is arranged at the bottom of the water storage box. The rectangular frame opens upwards and the top end of the of the rectangular frame communicates with the water storage box, water outlet holesare formed in the bottom end of the rectangular frame, and cutting knifes are hinged to the bottom end of the rectangular frame, wherein the hinged joints are in the rectangular frame and the cuttingknifes abut against the clamping portions. An arc guiding groove is formed in the cavity, the arc center of the guiding groove is positioned in the foaming cavity and the guiding groove abut against the cutting knifes. The sponge processing device solves the problems of inconvenient sponge demoulding and the sponge being liable to be damaged in the prior art.

The invention provides a fan frame structure which comprises a first frame. The first frame is provided with a first upper end, a first lower end, a first frame wall and a first main runner, the firstmain runner penetrates through the first frame and forms a first main inlet and a first main outlet at the first upper end and the first lower end correspondingly, a first auxiliary runner parallel to the first main runner is arranged in the first frame wall, the first auxiliary runner is located on the outer side of the first main runner and is provided with a first auxiliary outlet and a firstauxiliary inlet, the first auxiliary outlet is located in the first upper end of the first frame and is parallel to and adjacent to the first main inlet, the first auxiliary inlet is adjacent to the first lower end of the first frame and communicated with the first main runner, airflow can be guided to be jetted towards the first main inlet through the arrangement of the first auxiliary runner, and then the effects of noise reduction and airflow increase are achieved.