31results about How to "Strength advantage" patented technology

The invention discloses a formula of a composite material for an automobile interior part. The formula consists of the following materials in percentage by weight: 40 to 60 percent of polylactic acid fiber and 40 to 60 percent of natural fiber. The production method of the invention comprises the following steps: uniformly mixing the raw materials; putting the mixture into an opener for opening, combing and shaping the obtained product, feeding the product into a lapping machine for cross lapping and feeding the cross-lapped product into a needling machine for needling to form a felt; immersing the fiber felt into a processing slurry; drying the immersed coiled material through hot blast and cutting the dried material into pieces of required size; placing the cut material into a mould for curing and shaping by heating; demoulding the material to form a composite plate; and softening the composite plate by flat panel heating, covering the plate with a surface decorative layer and performing cold molding on the plate through a product mould to manufacture the finished product finally; or softening the cut fiber felt by the flat panel heating directly, covering the plate with the surface decorative layer and performing the cold molding to manufacture the finished product finally. The composite material for the automobile interior part of the invention has the advantages of no toxicity, no pollution, simple processing technique, small energy consumption and high environment protection performance.

A heat exchanger is provided for heat transfer between a first fluid, particularly charge air or an exhaust gas, and a second fluid, particularly a coolant, which has: a block for the separated and heat-exchanging guiding of the first and second fluid, the block which has a number of flow channels through which the first fluid can flow, at least one box which is assigned to the block and is flow-connected to the flow channels, and at least one base, which is provided with one or with more through openings for feeding through the flow channels between the block and the box, whereby at least one through opening is formed as a passage with a collar. The invention provides that the collar has a near-bottom section and an end-side section, whereby a wall cross section of the end-side section is smaller than a wall cross section of the near-bottom section and between the near-bottom and end-side section at least one shoulder is disposed, which has a shoulder contour running transverse to the contour of the near-bottom section and/or the end-side section and whereby the end-side section is inclined away from a passage axis. A use and manufacturing process are also provided.

The invention belongs to the field of metal materials, and particularly relates to a high-strength high-toughness die-casting aluminum alloy and a preparation method thereof. The high-strength high-toughness die-casting aluminum alloy comprises the following components: 4.2-5.3wt% of Mg, 1.5-1.8wt% of Si, 0.14-0.22wt% of Mn, 0.12-0.25wt% of Cu, 0.05-0.08wt% of Ti and the balance of aluminum and other impurity elements, wherein the content of the impurity elements is less than 0.005%. According to the invention, the problems of the existing Al-Mg series alloy such as poor casting performance and low die-casting molding possibility are well solved. After the developed high-strength high-toughness die-casting aluminum alloy is naturally aged at 20 DEG C, the yield strength of a casting is 180-200 MPa, the tensile strength is 340-350 MPa, and the elongation percentage is 10-15%. The alloy can be used for spare parts having complicated shapes and high strength requirements in the automobile and communication industries; and compared with the conventional Al-Si and Al-Cu series alloys, the alloy provided by the invention has remarkable advantages in the aspect of toughness.

The invention relates to a preparation method of a net structure titanium-silicon alloy phase reinforced TiAl-based composite. The method comprises the step of making, by mass percentage, 65-85% of prealloyed Ti-46Al-2Cr-2Nb powder and 15%-35% of Ti5Si3 powder be sequentially subjected to mechanical uniform mixing, vacuum hot pressing sintering formation and cooling at the room temperature, so that the net structure Ti5Si3 reinforced TiAl-based composite can be obtained. The method is simple in preparation process, low in cost and stable in product performance; and the obtained net structure Ti5Si3 reinforced TiAl-based composite is high in compression strength and excellent in wear resistance and can be used as a novel structural wear-resistant material.

The invention discloses a composite negative-stiffness energy absorption honeycomb structure and a preparation method thereof, and relates to a composite negative-stiffness energy absorption honeycombstructure. The problems that the number of times of reutilization of an existing negative-stiffness is small, strength is low, and the energy absorption effect is poor are solved. The design philosophy of a composite is used for design of the negative-stiffness structure, two materials of combining a soft material and a hard material are adopted for constructing the negative-stiffness through thecharacteristics that the stress features of all parts are different and stress distribution is not uniform in the deformation process of the negative-stiffness, and the aims of reducing weight and improving the mechanical performance of the structure are achieved on the basis of guaranteeing high-frequency reutilization. Preparation of the composite negative-stiffness honeycomb structure is completed mainly through the additive manufacturing technology such as the SLS technology, the FDM technology and the SLM technology. A new direction is provided for improving energy absorption of metamaterials. The composite negative-stiffness energy absorption honeycomb structure is applied to the field of metamaterials.

The invention relates to a high-temperature resistance and high-compatibility mixed material. The mixed material is prepared from the following components in percentage by mass: 40-50% of copolymer PP, 40-55% of PE, 3-15% of compatilizer INTUNE, 0.5-2% of lubricant and 0.5-1.5% of antioxidant. The mixed material provided by the invention perfectly integrates the advantages of PP and PE, and has good compatibility, high low-temperature impact resistance and good performance in rigidity, toughness, chemical resistance, high-temperature resistance and processability; and a preparation method of the mixed material provided by the invention has the advantages of easiness in operation, low cost and good material performance and has an economic value.

The invention discloses a high-performance concrete composite admixture and a preparation method thereof. The high-performance concrete composite admixture is prepared from the following raw materials in parts by mass: 30-60 parts of waste residues, 10-16 parts of tailings, 1-2 parts of desulfurization gypsum, 5-12 parts of powder and 1-5 parts of an activating agent. The invention also discloses the preparation method of the high-performance concrete composite admixture. The high-performance concrete composite admixture disclosed by the invention has the following beneficial effects: firstly, the raw materials of the admixture are taken from wastes to realize recycling utilization of solid wastes and solve land occupation and environmental pollution caused by stacking and burying; secondly, the admixture disclosed by the invention, by virtue of treatment and processing of the raw materials, has more excellent performance, so that the working performance and strength of each stage of concrete can be finally promoted significantly, and then the concrete becomes high-performance concrete with high durability, high applicability and high volume stability; and moreover, the admixture can greatly reduce the use level of cement and is very significant in cost reducing effect.

The invention discloses an electric vehicle body frame which relates to the technical field of electric vehicle manufacture. The electric vehicle body frame comprises an electric vehicle body frame body. The electric vehicle body frame body is provided with side electric vehicle body frames at two sides and an electric vehicle top frame and a front electric vehicle carriage which are connected with the side electric vehicle body frames at the two sides. Each side electric vehicle body frame is composed of a side electric vehicle body outer plate and a side electric vehicle body inner plate which are connected through mortises. The electric vehicle top frame is composed of an electric vehicle top outer plate and an electric vehicle inner plate which are connected through mortises. The front electric vehicle carriage is composed of a front electric vehicle carriage outer plate and a front electric vehicle carriage inner plate which are connected through mortises. Compared with the prior art, the electric vehicle body frame is advantageous in that the integral weight of the electric vehicle body is reduced; strength, consistency and weight of the electric vehicle body frame are respectively better than the strength, the consistency and the weight of the electric vehicle body frame manufactured according to the prior art.

The invention discloses a ceramic exhibition cabinet and a using method thereof. The ceramic exhibition cabinet comprises an outer cabinet body, the outer cabinet body comprises an upper shell and a lower shell, a vertically-through first moving groove is formed in the upper shell, a second moving groove with an upward opening is formed in the lower shell, and a telescopic rod is installed in the bottom wall of the second moving groove; ceramic is stored in the first moving groove, the ceramic is protected through the outer cabinet body, meanwhile, a triangular cone made of a transparent material is placed on the top face of the outer cabinet body, a 3D holographic image of the ceramic is formed in the triangular cone through playing equipment for viewing, meanwhile the outer cabinet body is divided into an upper shell and a lower shell, separation of the upper shell and the lower shell is controlled through a telescopic shell and a connecting rod, the ceramic stored in the outer cabinet body can be exposed after the upper shell and the lower shell are separated, meanwhile, the periphery of the ceramic is protected through an anti-explosion transparent plate, and the ceramic can be conveniently viewed.