66results about How to "Reduce resin content" patented technology

The invention provides a manufacturing method of a carbon fiber composite material rectangular hollow pipe for a mechanical arm, and the obtained rectangular hollow pipe. A carbon fiber composite material serves as a raw material and is carbon fiber prepreg; the prepreg comprises one-way and fabric prepregs and the rectangular hollow pipe is manufactured by a mould pressing inflation forming method. According to the manufacturing method of the carbon fiber composite material rectangular hollow pipe, a rectangular thin-walled hollow pipe is manufactured by performing mould pressing inflation combined forming on the carbon fiber prepreg serving as the raw material. Compared with the prior art, the invention has the advantages that the carbon fiber composite material rectangular hollow pipe has high bearing capacity, high rigidity and light weight; during operation, the arm is more stable in action and moves and stops more quickly; the arm can be quickly positioned by the vibration damping characteristic of the carbon fiber composite material; the carbon fiber composite material is applicable to precision equipment due to the zero thermal expansion coefficient; equipment investment is small; a mould is simple to manufacture; production energy consumption is low; production period is short; automatic production is realized.

The invention discloses a special size of chopped twistless roving with ultra-low resin absorbing-capacity, comprising coupling agent, lubricant, antistatic agent A, antistatic agent B, film forming agent A, film forming agent B, film forming agent C and a pH value regulator; all the materials respectively accounts for 1 to 10 percent, 1 to 10 percent, 1 to 5 percent, 1 to 5 percent, 10 to 80 percent, 80 to 10 percent, 1 to 5 percent and 0.1 to 5 percent and water as the rest; the content of the water accounts for 85 to 95 percent of the total weight of the size; the coupling agent adopts silane coupling agent, the lubricant adopts water-soluble grease lubricant, the antistatic agent A adopts organic salt substance with good water absorptivity, the antistatic agent B adopts inorganic salt substance with good water absorptivity, the film forming agent A, the film forming agent B and the film forming agent C respectively adopts one of epoxy emulsion, polyester emulsion, polyvinyl acetate (PVAc) emulsion and polyurethane emulsion; the film forming agent C selects compound with low degree of polymerization, the pH value regulator adopts acid and the pH value of the size is 3 to 11. The size can improve the penetration velocity under the situation of meeting the requirements of the chopped technique, achieves the high content of the glass fibre and ultra-low content of resin, improves the production efficiency of the client and reduces the production cost.

The invention discloses a thermoforming method of a co-woven continuous fiber reinforced thermoplastic structural plate. The method comprises: first co-weaving prepreg into sheet or band prepreg on a braiding machine; spreading the prepreg on a die and conducting sealing with a vacuum bag or a polyester film; then raising the temperature, carrying out vacuum pumping to maintain a vacuum negative pressure, when the temperature reaches the melting point of thermoplastic resin, preserving the heat for a period of time, then performing cooling for molding; finally dismounting the vacuum bag or the polyester film so as to obtain a structural plate. The structural plate produced by the co-weaving method can expel air among the internal layers of the prepreg. Pressure is transmitted uniformly through fibers, so that shift in fiber direction can be avoided, and the structural plate also can be reinforced based on original enhanced fibers, thus substantially saving cost.

Woven fabric of continuous, untwisted carbon yarn is impregnated with a modified cyanate ester resin or oligomer, preferably at least about 10% by weight of the combined weight of the cured resin and fabric. The cured fabric may be employed as a wet friction material suitable for use in transmission fluid couplings, and the like. The cured composite sheet can be backed with an adhesive film or liquid bonding paste for ease of bonding to one side of the metal portion of the transmission or clutch. Where thicker material is required, two or more cured composite sheets can be bonded together for applications such as transmissions.

The invention provides an epoxy heating fiberglass mould and a preparation method thereof. The preparation method comprises the following steps including female mould manufacturing, mould structural manufacturing; gel coat manufacturing; topcoat manufacturing; heating layer manufacturing; structural reinforcing layer manufacturing; heat preservation layer manufacturing; framework support manufacturing; temperature control system manufacturing; and silica gel surface mould manufacturing. The epoxy heating mould meets the requirements that the high temperature deformation temperature is above 120 DEG C, the shrinking percentage is low, and heating is uniform, and the technical problem that local overheating damages the mould is solved.

The invention provides a preparation method of an integrally-woven hot-pressed friction material. According to the method, metal fibers, inorganic fibers and/or organic fibers are made into plied yarns; the plied yarns are woven into cloth through a multi-layer integral weaving method; the cloth is soaked in resin and then dried, so that a blank can be obtained; the blank is cut and then placed ina hot-pressing mold; hot-pressing curing is conducted to obtain a semi-finished product; and the semi-finished product is subjected to heat treatment, machining and other procedures, so that a finished product can be obtained. As the friction material takes the integrally woven cloth as a framework, the fiber content of thefriction material is high, and the resin content of the friction materialis low. The finished product is high in strength and low in hardness, has certain flexibility, and can assist in solving the problems of an existing friction material.

The invention discloses a method and a device for leaching high-quality lignite wax. The leaching method comprises the followings steps: smashing lignite, sieving by use of a sieve with the hole size of 1.0-8.0 millimeters, and drying until the water content is 15-25 percent; loading the dried lignite and a straight-chain paraffin solvent into a leaching device at a temperature of 0.5-1.5MPa at a material-liquid ratio of (1:2)-(1:5) (kg/L), soaking at the temperature of 10-40 DEG C for 3-6 hours, and performing material-liquid separation to obtain leach liquor and residual lignite; putting the leach liquor into a separating device, and heating to 30-60 DEG C or reducing the pressure to 30-60KPa for evaporating the solvent to obtain lignite wax and a solvent; putting the leached residual lignite into a desolventizer, and heating or evaporating the residual solvent under reduced pressure under the conditions of the step C to obtain lignite residues and the solvent. The leaching device comprises a leacher, a fluid wax evaporation-separation tank and a solvent storage tank. According to the method, low-toxicity straight-chain paraffin is taken as a leaching solvent, and a leaching process is performed at the room temperature or a temperature higher than the room temperature, so that energy conservation and environmental protection are facilitated, and the resin content and asphalt content of the wax are low.

The invention relates to an epoxy vinyl ester micro compound resin and preparing method thereof. The resin is characterized by that epoxy vinyl ester micro compound resin mainly comprises epoxy vinyl ester resin, quartz sand, dispersant, defoaming agent and leveling agent. The preparing method of epoxy vinyl ester micro compound resin comprises the following step: (1) Weighting raw materials according to claim 2 formula; (2) mixing and stirring raw materials after the raw materials are added into mixing tank; (3) adding the raw materials into high-speed dispersing machine for dispersion; (4) adding the raw materials into grinding miller for grinding; (5) packaging all raw materials in different packages and placing them in cool and dry place for later use. In the preparing method, high-speed dispersing can mix the chemical materials with quartz powder completely and evenly, grinding can open the particles of original resin to make the particles form a new combination with the high-speed dispersed mixture which is added later, in order to form epoxy vinyl ester micro compound resin.

A kind of facilities of preliminary mixing for manufacturing the glass fiber reinforced thermal-setting resin sand-inclusion piping. Including: the sand box, the transporting device, its characteristic lies in: a measure feed transporting machinery is linked to the outlet of the sand box, at the exit of the transporting machinery is linked with a premixing device, a rolling device is linked to the outlet of the preliminary mixture, the said rolling device includes the two parallel rolls, two parallel cloth sand-hood. After the pressing device, it establishes the belt conveyer which matches with a rotating mold. The beneficial result of the invention is that it lowers the resin content effectively, economizes direct material cost of the product. It is advantageous to control the product quantity, the resin is soaking well, the mezzanine sand layer density is high, raising the quantity of the product effectively.

The invention discloses a core material structure. The core material structure comprises a main body and grooves distributed in the main body, wherein the grooves comprise at least one first groove which is formed in the first surface of the main body and extends in the length direction of the fan blade; and the at least one second groove is formed in the first surface of the main body and extends in the chordwise direction of the fan blade.

The invention relates to a processing technology of a PCB plug hole board. The processing technology is used for manufacturing a PCB. During green-oil printing of the PCB, green oil is formed by mixing special plug hole oil and welding surface-resistant oil according to a mass ratio being 1:1, the special plug hole oil is high in content and does not have developing performance, the saturation ofink in a hole can be ensured by a plug hole, the welding surface-resistant oil is high in developing performance and low in resin content, rework can be ensured when the plug hole is unfavorable, theresin content of the ink of a new plug hole can be ensured when the special plug hole oil and the welding surface-resistant oil are matched to form the plug hole according to a proportion being 1:1, meanwhile, the oil developing performance of the new plug hole is also satisfied, the saturation condition of the plug hole is ensured, rework also can be performed when unfavorable condition occurs, and the scrap of a PCB cannot be caused.

The phenolic resin adhesive additive is prepared through mixing 3-25 % concentration sodium carbonate solution in 70-80 weight portions and fenugreek slag powder in 20-30 weight portions, heating to 70-80 deg.c to react for 3-6 hr, cooling to 30 deg.c to obtain fenugreek adhesive with viscosity 200-400 mPa.s as the additive for phenolic resin adhesive. Alkaline water soluble phenolic resin and the fenugreek adhesive in the weight ratio of 50-90 to 10-50 are mixed to obtain the phenolic resin adhesive. The phenolic resin adhesive has low production cost, high adhesion strength and low formaldehyde releasing amount.

The invention discloses a composite material unmanned ship body forming method which comprises the following steps: 1) preparing a mold and equipment, and enabling a ship body structure to comprise nine composite material parts; (2) paving the composite material part; 3) autoclave curing molding; according to the method, the boat body is divided into nine parts by adopting a prepreg paving autoclave curing forming process, the number of the parts is reduced, the parts are cut by utilizing an automatic cutting machine to be paved with the shape-following prepreg, the utilization rate of raw materials is effectively improved, and the utilization rate of the raw materials and the production efficiency are remarkably improved.

The invention relates to a method for fabricating a glass fiber reinforced plastic square box. Panels of the square box are prefabricated first and then are spliced into the square box. The splicing method is that the side panels of the square box are hoisted to a bottom panel, and splicing joints between the bottom panel and the side panels and between the side panels are manually pasted for reinforcement. The fabrication steps of the panels are that: (1) the fabricating glass fiber reinforced plastic inner layer with thickness of 5-10mm is fabricated; (2) the fine aggregate mortar interlayer of the panel is fabricated; and (3) the surface of the fine aggregate mortar is ground, the surface is leveled by using resin putty and finally the glass fiber reinforced plastic outer layer of the panel is fabricated. The invention has the advantages that the production preparation tasks are simplified, the overall rigidity is enhanced, the assembling is rapid and simple because the panels are fixed into a whole body in a splicing way, the large square box can be spliced in the field and the transportation difficulty is reduced. Moreover, the invention solves the defects that the fabrication of the glass fiber reinforced plastic square box is very difficult and the square box is apt to be deformed, the cost is reduced because low-cost fine aggregate mortar is used for substituting for the glass fiber reinforced plastic layer, the overall rigidity of the square box is improved and the safety in use is improved.