10results about How to "Short molding time" patented technology

The invention provides a carbon fiber thermoplastic composite box and a preparation method, and relates to the technical field of box forming. Comprising the following steps: S1, arranging carbon fiber thermoplastic prepregs according to a set layer number to obtain a laminated green body, and preheating the laminated green body; s2, carrying out hot press molding on the laminated green body areas forming the box body flat plate parts, and keeping a softening state between the adjacent areas to obtain box body flat plates which are dispersedly arranged on the laminated green body; s3, carrying out hot stamping on the laminated blank body in the softened state to obtain a bulge in the same stamping direction; and S4, the protruding part of the laminated blank is heated and bent, and the box body structure is defined by the box body flat plates. Due to the fact that all the components of the box body are cured and formed step by step, that is, uncured hole channels are reserved in the laminated green body in the first hot press forming process, resin flowing and gas escaping in the laminated structure are facilitated, and therefore microdefects are eliminated, and the stability of the product performance is improved.

The invention discloses a finely separated waste asphalt mixture fine material prefabricated building block and a preparation method thereof, and belongs to the technical field of road engineering.The preparation method comprises the following steps that an asphalt pavement recycled material is refined through refining equipment, and vibratory screening is performed to obtain an asphalt pavement recycled material fine material; detecting the mass of the aged asphalt in the fine asphalt pavement reclaimed material through a combustion method; placing the fine asphalt pavement recycled material in a drying oven for preheating and heat preservation, after preheating and heat preservation are finished, placing the fine asphalt pavement recycled material in a mixing pot for heating and mixing, and adding a regenerant according to the mass of the aged asphalt for continuous mixing, so as to obtain a regenerated asphalt mixture after preheating and heat preservation are finished; and loading the regenerated asphalt mixture into a mold, loading and molding to obtain the finely separated waste asphalt mixture fine material prefabricated building block. According to the invention, full utilization and high-value recovery of the fine aggregate of the recycled asphalt mixture can be realized.

The invention discloses a novel benzyl acrylate neutron / gamma discrimination plastic scintillator and a preparation method and application thereof. The plastic scintillator is composed of a polymer matrix, a main fluorescent dye and a secondary fluorescent dye, the polymer matrix is benzyl acrylate (BA), the main fluorescent dye is 2, 5-diphenyl oxazole (PPO), and the secondary fluorescent dye is 7-diethylamino-4-methylcoumarin (MDAC) or 9, 10-diphenyl anthracene (DPA). The prepared plastic scintillator uses a new organic polymer matrix, and compared with a plastic scintillator of the same type, the preparation cost is lower, the forming time is shorter, and the plastic scintillator has good stability, optical transparency and mechanical strength and has neutron-gamma discrimination capability.

The invention discloses a pure adhesive film and a preparation method thereof. The pure adhesive film comprises the following raw material components in parts by mass: 15-40 parts of low-Tg saturated polyester resin; 10 to 35 parts of high Tg saturated polyester resin; 5 to 20 parts of epoxy resin; 0.1-5 parts of a curing agent; 0.01 to 1 part of an accelerant; 10 to 30 parts of a flame retardant; 0.1 to 1 part of a coupling agent; 40 to 110 parts of a solvent; wherein the Tg value of the low-Tg saturated polyester resin is-10 DEG C to 20 DEG C; and the Tg value of the high Tg saturated polyester resin is 50-80 DEG C. The prepared pure adhesive film is excellent in stripping performance, shearing performance and aging resistance, and extremely low in moisture absorption rate.

The invention discloses a wire-based directional energy deposition laminated structure Cu-Fe additive part and a preparation method and application thereof, and through a wire directional energy deposition technology, Cu welding wires and Fe welding wires are alternately deposited on a substrate to obtain the laminated structure Cu-Fe additive part; the proportion of Cu and Fe elements in the additive part is regulated and controlled by controlling the wire feeding speed, and the fusion condition of a Cu and Fe deposition layer interface layer and alloy element transition are regulated and controlled by controlling the welding current and voltage; the prepared Cu-Fe alloy additive part has higher strength, hardness and conductivity; according to the Cu-Fe additive part prepared through the wire directional energy deposition technology, the problem that in other preparation processes, due to material metallurgy incompatibility, the performance is reduced can be solved; and compared with other additive processes, the method has the characteristics of being relatively high in deposition rate, relatively low in cost, small in size limitation and the like, and has huge potential in the aspect of building large structural parts with complex structures.

A quartz crucible high-pressure slip casting process, the specific process steps are: model compaction - slurry pressurization - slip casting - heat conduction oil heating - green body stripping - model self-cleaning - crucible high-pressure slip casting process operation flow is completed.The forming process disclosed in the application has the advantages that the crucible high-pressure slip casting process is short in time, the crucible green body structure is uniform and compact, the inner and outer walls of the crucible are smooth, the crucible green body is rapidly hardened through the heating function of the model outside, demolding is convenient, and the forming efficiency is high.

The invention discloses a supporting structure of an inner cavity of a carbon fiber part. The supporting structure comprises an air pipe, a core part, an embedded part and a fixing part. The surface of the air pipe, the surface of the core part and the surface of the fixing part are all coated with demolding layers. The core body part is fixed with the peripheral side surface of the air pipe in a fitting and contact manner; the embedded part is fixed on the peripheral side surface of the core body part; one end of the fixing piece abuts against the inner embedded piece, and the fixing piece is matched with the core body piece to limit the inner embedded piece. An air pipe, a core part, an embedded part and a fixing part are fixedly assembled together, then the surface of the air pipe, the core part, the embedded part and the fixing part are coated with at least one layer of carbon fiber cloth in a matched mode, the air pipe, the core part, the embedded part and the fixing part are placed in a mold, mold closing and pressing are conducted, hot air is blown to the air pipe to form a carbon fiber part structure, and after the air pipe, the core part, the embedded part and the fixing part are taken down, the carbon fiber part with an inner cavity can be obtained. The preparation method is simple, the forming time is short, the supporting structure can be taken out without being soaked and loosened, and the large consumption of labor and time cost is avoided.

The invention relates to the technical field of carbon fiber reinforced resin, in particular to a method for preparing a propeller from chopped carbon fiber reinforced resin and application. The invention provides a method for preparing a propeller by using chopped carbon fiber reinforced resin, which comprises the following steps: crushing a carbon fiber pre-impregnated belt into a carbon fiber chopped belt with the length of 20-40mm, and then carrying out hot press molding to obtain the propeller, wherein the thickness of the carbon fiber pre-impregnated belt ranges from 0.05 mm to 0.10 mm. The propeller is prepared from the chopped carbon fiber reinforced resin, so that the mechanical property of the product can be improved while the advantages of chopped fibers are reserved.

The application relates to a rapid-forming geopolymer concrete prefabricated component and a preparation method thereof. The technical scheme is as follows: 125-150 parts by mass of sodium metasilicate is mixed with 200-235 parts by mass of water to obtain a solution; the solution is stirred until it is clear, and is cooled to 5-15 DEG C to obtain an alkali activator; the alkali activator is mixed with 225-285 parts by mass of metakaolin, 60-120 parts by mass of fly ash, 400-600 parts by mass of fine aggregate and 550-850 parts by mass of coarse aggregate, is stirred, is poured, and is shaped for 10-30 min; demolding is carried out, and maintenance is carried out at normal temperature for 2-7 days to obtain the rapid-forming geopolymer concrete prefabricated component. The application has the characteristics of high solid waste resource utilization rate, short forming time, low maintenance cost and high mold flow efficiency, can be directly operated on a construction site and can be rapidly and continuously produced, and the prepared rapid-forming geopolymer concrete prefabricated component has early compressive strength.

The present invention belongs to the technical field of profile straightening, and relates to an automatic positioning mechanism for aluminum profiles and an aluminum profile straightening machine, comprising a first detector and a second detector respectively arranged at two ends of different sides of the aluminum profile, and a power supply electrically connected to the first detector and / or the second detector, the first detector is provided with a first conductor, the second detector is provided with a second conductor, the power supply, the first conductor, the aluminum profile, and the second conductor form a conductive path, and the edge of the aluminum profile is determined by the on-off of the conductive path; the present invention can ensure that both ends of an aluminum profile of any size that meets the tonnage of the extruder can be exactly at the clamping position of the first jaw and the second jaw, ensuring that the aluminum profile can smoothly enter the first jaw and the second jaw, and at the same time has the advantages of high one-time clamping efficiency without manual visual adjustment of the second jaw. It can effectively reduce labor intensity, reduce the straightening process time, shorten the aluminum profile forming time, and have a high yield.