49results about How to "Guaranteed physical and mechanical properties" patented technology

The present invention provides a kind of bamboo bundle fiber integrated veneer weaving machine, comprising frame, and feeding mechanism on the frame, weaving mechanism, mechanical induction triggering mechanism and the transmission mechanism inside the frame, in addition, the present invention also Provide a kind of veneer weaving method of bamboo bundle fiber integral veneer weaving machine, comprising the following steps: S1, power-on inspection: S2, preparatory work: arranging a plurality of wire rolls on the frame, and adjusting the distance between the wire rolls Spacing, select the bamboo veneer, ready to start feeding; S3, weaving: start the weaving machine, when the bamboo veneer is woven to a predetermined length, stop the machine, and tie each thread and cut it; S4, Winding Drying, the invention solves the problem that the bamboo bundle unit for recombined bamboo cannot be processed into a single board during the weaving process of the whole bamboo bundle fiber, and at the same time it is inconvenient to adjust the weaving tightness of the whole bamboo bundle veneer. It is not applicable to the problem of weaving processing of bamboo beam units of different thicknesses.

The invention relates to a fast-growing wood surface reinforcing manufacturing method and sections manufactured thereby, belonging to the field of functional improvement on wood and wood processing. The technical scheme comprises the following steps of (1) drying step: drying fast-growing wood till a moisture content of 5-12%; (2) carbonizing step: carbonizing the fast-growing wood; (3) surface reinforcing step: compacting and reinforcing the surface of the fast-growing wood; and (4) thermally processing and fixing step: thermally processing and fixing the fast-growing wood at the temperature of 180-220 DEG C. The problems are solved that in the conventional technical scheme, the production process is complicated, the production cost is high, the wood yield is low, obtained sections are poor in texture and color and luster and poor in product stability, and the like; compared with the prior art, the fast-growing wood surface reinforcing manufacturing method has the advantages of simple process, no addition of any chemical in the production process, environment-friendly production, high production efficiency, capability of realizing large-scale flow-line production, low wood loss, high wood yield, low production cost and the like; and the obtained fast-growing wood surface-reinforced sections have the advantages of hard surfaces and soft middle parts or bottoms, high size stability, high corrosion resistance, clear texture, plump color and luster, good decorative effect and the like.

The invention discloses a powder metallurgy friction material for railway passenger cars and a preparation method thereof, which comprises the following components by mass: 40-60 parts of copper powder, 8-20 parts of iron powder, 4-11 parts of tin powder, chromium alloy 3-8 parts of nickel powder, 3-4 parts of nickel powder, 1-3 parts of molybdenum alloy powder, 0.5-3 parts of phosphorus-iron alloy powder, 0.5-3 parts of manganese powder, 2-5 parts of titanium carbide, 2-5 parts of mullite , 1-3 parts of chromium oxide, 9-25 parts of graphite, and 1-4 parts of molybdenum disulfide. Copper powder, iron powder, tin powder, chromium alloy powder, nickel powder, manganese powder, molybdenum alloy powder and ferrophosphorus powder are mechanically alloyed, then the remaining components and binder are added for mixing; the mixture is cold pressed After forming, it can be degummed and then sintered without pressure at high temperature. The invention not only reduces the production cost of pressure sintering and restricts requirements on equipment and tooling, but also improves the continuous production efficiency and the stability of friction material performance.

The invention belongs to the field of wood adhesives, and particularly relates to a method for reducing the sizing amount of melamine-modified urea-formaldehyde resin wood adhesives, which includes the steps of making glue, adjusting glue, sizing glue and hot pressing, and is characterized in that the method is diluted Reduce the sizing amount of the melamine modified urea-formaldehyde resin wood adhesive; the dilution method is to add water to dilute, which is used for gluing of medium and high density fiberboards and particleboards. The melamine-modified urea-formaldehyde resin adhesive of the present invention has a melamine content of more than 5% (by weight) and good water solubility. The dilution process can be completed in the late stage of glue production or in the stage of glue mixing. The amount of water added is 0.1~2 times the weight of the adhesive, and then stirred at high speed. The invention has the advantages of being able to reduce the amount of sizing by 9-18%, the amount of formaldehyde emission above E1, the method is simple, the use is convenient, the cost is saved, and the physical and mechanical properties of the board are guaranteed at the same time.