32results about How to "Improve molding cycle" patented technology

The invention discloses a preparation method of a rapid prototyping material. The preparation method comprises the steps of providing raw materials, wherein raw materials comprise the following ingredients in parts by weight: 85-97.5 parts of engineering plastics, 0.5-5 parts of nanocellulose and 2-10 parts of viscosity reducer; (S1100) weighing the raw materials: drying the raw materials for 4-10 hours at the temperature of 105 DEG C, and then, weighing the raw materials according to a weight ratio; (S1200) carrying out blending modification: carrying out three-dimensional stirring and blending on the weighed raw materials for 30-90 min; and (S1300) sieving: sieving the blended raw materials by using a sieve of 70-140 meshes. The invention further discloses the rapid prototyping material obtained through the preparation method. According to the rapid prototyping material disclosed by the invention, the preparation process is simple, and the industrialization is easy to realize; and the material is short in prototyping cycle, good in thermal stability and high in mechanical strength.

The invention relates to a kind of polyethylene glycol terephthalate combination and its manufacturing method, which involves in the field of polyester resin crossblending and modifying. The combination contains the constituents as follows: polyethylene glycol terephthalate, styrene-butadiene pyrrole powder rubber containing cross-linking structure with average grain size of 30-200nm, and so on; among them, the part by weight of polyethylene glycol terephthalate is 100, and the part by weight of styrene-butadiene pyrrole powder rubber is 1-20. Melting and crossblending the constituents mentioned above can get polyethylene glycol terephthalate combination. The combination has fine tenacity and excellent processing ability, and meanwhile, it can keep well heat resistance and rigidity.

The invention relates to a high-density polyethylene material and application thereof. The material comprises the components in percent by weight: 100% of high-density polyethylene, 5-80% of para-phthalic metal salt, 1-8% of silicone oil and 0.5-5% of antioxidant. The para-phthalic metal salt is selected from calcium terephthalate, magnesium terephthalate, zinc terephthalate, potassium terephthalate, sodium terephthalate, barium terephthalate, lead terephthalate, aluminum terephthalate, ferrum terephthalate or a mixture thereof. The silicone oil is selected from active silicone oil, dimethyl silicone oil, 201 methyl silicone oil or a mixture thereof. The antioxidant is selected from tris(2,4-ditert-butylphenyl) phosphate, pentaerythrite tetra [beta-(3,5-di-tert-butyl-4-hydroxyphenyl)-propionate], 2,6-di-tert-butyl-4-methylphenol, 2,2'-methylenebis[6-(1,1-dimethylethyl)-4-methyl-phenol or a mixture thereof. The polyethylene material provided by the invention has a small friction coefficient and favorable self-lubricity and can be used for manufacturing optical cable protection sleeves.

The invention provides a mould requiring no thimble to participate in a molding process and relates to an injection mould, which comprises a moveable mould and a fixed mould, wherein a front mould core is arranged on the moveable mould; sliding block binding blocks are symmetrically arranged on the moveable mould; a product cavity is arranged on the fixed mould; thimbles are symmetrically arranged at the left and right sides of the product cavity; sliding block inserts are symmetrically arranged at the upper ends of the thimbles at the left and right sides and of the upper surfaces at the left and right sides of a back mould core, so as to keep the upper ends of the thimbles lower than the lower surfaces of the sliding block inserts; the sliding block inserts are fixedly inserted in sliding block bases; the sliding block bases can slide left and right; the sliding block base at the left side is moveably matched with the sliding block binding block at the left side of the moveable mould; the sliding block base at the right side is moveably matched with the sliding block binding block at the right side of the moveable mould; and the upper ends of the thimbles are shielded or exposed. The mould requiring no thimble to participate in a molding process has the advantages that the thimbles are free from participating in molding and only have the function of ejecting the product out of the mould after the mould is opened, so the product formed in the manner of injection molding is free from deckle edge, the quality of product is increased, the investment is greatly reduced, the production efficiency is increased and the labor cost is lowered.

The invention discloses a high-friction-coefficient polyamide material and a preparing method and application thereof. The high-friction-coefficient polyamide material is prepared from, by weight, 60%-85% of polyamide resin, 5%-15% of a coating inorganic filler, 5%-25% of a toughening agent, 0.1%-0.2% of a silane coupling agent, 0.1%-0.5% of an antioxidant and 0.5%-0.8% of a lubricating agent. Thehigh-friction-coefficient polyamide material has the advantages of being good in abrasive resistance, high in dynamic friction coefficient and excellent in mechanical property.

The invention provides a polyamide composite material which comprises the following components in parts by weight: 80-100 parts of short-carbon-chain polyamide; and 0.1-6 parts of an amide oligomer. In the repeating units of the short-carbon-chain polyamide, the number of carbon atoms on a main chain is smaller than or equal to 6. According to the polyamide composite material as well as the preparation method and application thereof, a small amount of amide oligomer is added, so that the injection molding property of the polyamide composite material can be obviously improved, the problems of mucous membrane, top bulge and the like in the production link are improved, the production efficiency is improved, and other properties such as mechanical properties of the polyamide composite material will not be obviously reduced.

The invention belongs to the technical field of glass bottle production, and discloses a glass bottle cold start-up rapid forming method, which is used for a preheating production stage of a rank machine, the forming method comprises positive blowing, initial mold cooling and mold forming cooling, and the opening timing of the positive blowing is delayed by 70-90 units of periodicity from the opening timing during normal production; the opening timing of the primary mold cooling is delayed by 15-25 units of periodicity from the opening timing during normal production, and the stopping timing of the primary mold cooling is advanced by 50-70 units of periodicity from the stopping timing during normal production; the start timing of mold forming cooling is delayed by 60-80 units of periodicity from the start timing during normal production; wherein the periodicity of one unit is alpha, and alpha meets the following formula: alpha=(t*N)/(360*V). The rejection rate of the glass bottles is greatly reduced and the cost is reduced by delaying the start timing and stop timing of positive blowing, mold forming cooling and initial mold cooling and reducing the cooling air of the bottle conveying machine.

The invention discloses a high-speed mould threaded core cooling structure which comprises an internal core and a threaded core. The high-speed mould threaded core cooling structure is characterized in that the threaded core is provided with a hollow cavity; an insert is arranged in the hollow cavity; a gap is reserved between the insert and the inner wall of the hollow cavity; and a cooling loopis formed by the gap. According to the high-speed mould threaded core cooling structure, the cooling loop is more balanced, the cooling on the forming part of a product is more direct and effective, the production efficiency is improved and the produced product meets the all requirements.

The present invention provides a carbon paper composite material used for laser laminating molding and a preparation method thereof, and the carbon paper composite material comprises the following raw materials by weight ratio: 5 to 20 parts of carbon paper, 80 to 95 parts of a resin matrix, 1 to 5 parts of a coupling agent, 0.5 to 3 parts of an antioxidant, 0.5 to 5 parts of a heat stabilizer and 0.5 to 5 parts of a lubricant. The prepared carbon paper composite material used for laser laminating molding ahs the characteristics of simple preparation process, high mechanical strength, fast forming speed, low water absorption, and the like, can significantly shorten the production cycle and reduce cost, can be directly applied and promoted in laser laminating molding manufacturing technology, and can be directly processed into structural parts.

Provided is a fully automatic overturn-type toilet seat ring multi-green-body high-pressure production process. In the high-pressure grouting process, a high-pressure grouting pressure adjustment process is added: the grouting pressure is adjusted in the high-pressure grouting process, and a pressure sensor is additionally installed in a mold for monitoring; after the grouting pressure is adjusted, the pressure sensor sends a pressure value signal to a PLC, the pressure value signal is processed by the PLC, and then a command is transmitted to a hydraulic pressure proportional valve in a hydraulic mold assembling locking system; the pressure proportional valve adjusts the pressure to meet a pressure environment adapting to the grouting; and high-pressure grouting is finished in the qualified pressure environment and the mud discharge process is started. The process overcomes the shortcomings of a traditional high-pressure grouting process, is more convenient to operate, has higher andmore stable green body yield, and longer mold life, greatly reduces the use cost of the mold, shortens the entire green body molding cycle, and greatly improves production efficiency and product yield. The moisture content of green bodies shortens the drying time of the green bodies, and the degree of environmental pollution is reduced.