33results about How to "Solve the warping problem" patented technology

The invention belongs to the field of printed circuit boards, and provides a method for producing an asymmetrically laminated printed circuit board. Hot pressing treatment is performed on boards in six stages by modifying lamination parameters, pressure, temperature and time are rationally controlled according to production requirements, and the boards are gradually and uniformly heated and pressurized in stages, so that a manufacturing process for the printed circuit board is optimized. A layer of core board is sandwiched between the boards, so that the hardness of the boards is improved, the boards are difficult to bend and deform, the problem that the board is warped towards a thin surface in the production of a subsequent procedure after the lamination is effectively solved, the production difficulty of the subsequent procedure is reduced, a leveling step after forming is avoided, production cost is decreased, and production efficiency is improved.

The invention belongs to the technical field of solar double-glass photovoltaic modules and in particular relates to a viscidity-reducing adhesive tape for lamination edge seal of a solar double-glassphotovoltaic module and a preparation method of the viscidity-reducing adhesive tape. The viscidity-reducing adhesive tape adopts a flexible substrate, the used composite membrane is not needed to bereleased, the prepared viscidity-reducing adhesive tape for the lamination edge seal of the solar double-glass photovoltaic module is not cross-linked at normal temperature, high in initial viscosityand good in compliancy, no residual adhesives exist when the adhesive tape is stripped after heating lamination, the adhesive tape is easy to strip and incapable of breaking, and the problem that theadhesive tape is easy to warp during construction under a low-temperature condition is solved. The adhesive tape disclosed by the invention has no burrs when being processed and slit, and the viscidity of the adhesive tape is reduced when the adhesive tape is stripped after high-temperature lamination, so that the adhesive tape is relatively easy to strip, no residual adhesives exist, and the condition of breaking can be avoided; and compared with an ordinary high-temperature-resistant silica gel adhesive tape, the viscidity-reducing adhesive tape is capable of reducing the production cost and increasing the production efficiency.

The invention discloses nylon composite material and a preparation method thereof. The material is composed of nylon 66 slices, thermotropic liquid crystalline polymer, needle-like mineral fiber, coupling agent and antioxidant. The weight ratio of the nylon 66 slices, the thermotropic liquid crystalline polymer, the needle-like mineral fiber, the coupling agent and the antioxidant is 60-70: 10-15: 20-30: 4.5: 0.5. The preparation method comprises the following steps: the nylon 66 slices, the thermotropic liquid crystalline polymer, the needle-like mineral fiber, the coupling agent and the antioxidant with weight ratio of 60-70: 10-15: 20-30: 4.5: 0.5 are mixed evenly under the agitating condition, and then extruded, drawn and granulated at 280 DEG C or 295 DEG C, and molded by injection into the sample to obtain the nylon system composite material. The nylon system of the invention can attain the remarkable enhancement effect under the circumstance of a little thermotropic liquid crystalline, and can have the effects on lightening the warping of the product, reducing the roughness of the product surface and reducing the cost.

The invention provides a novel nylon material, a preparation method and its application in 3D printing. The preparation method of the nylon material comprises: 1) making acrylate monomers and functionalized olefin monomers under oxygen-free conditions Polymerization to prepare polymer a; 2) react the polyamide hard segment with the amine group or carboxyl group in polymer a to prepare polymer b; 3) dissolve polymer b, add alkali catalyst to hydrolyze its ester group generating carboxyl groups to prepare polymer c; 4) adding an esterification catalyst to react the carboxyl groups generated by the hydrolysis of polymer c with the hydroxyl groups in the soft segment of polyether polyol to prepare the nylon material. The nylon molecule prepared by the method of the present invention has a polyacrylate segment as the main chain, and a polyamide hard segment and a polyether polyol soft segment as side chains, which can solve the problem that nylon materials are easy to warp during 3D printing.

The invention discloses metal product punching equipment. The metal product punching equipment comprises a top plate, a punching mechanism, stand columns and a base, the four corners of the lower partof the top plate are provided with the stand columns, the four stand columns are installed on the base, and the middle position above the top plate is provided with the punching mechanism; the punching mechanism comprises a mounting base, a machining box, a hydraulic machine, an air cylinder A and a punching head, wherein a workbench is installed right below the punching head, and a Y-axis transmission mechanism is installed at the middle position inside the workbench; and the Y-axis transmission mechanism comprises a Y-axis motor, a Y-axis screw rod, the Y-axis motor is installed at the leftend inside the workbench, and an output shaft of the Y-axis motor is rotationally connected with the Y-axis screw rod through a coupler. According to the metal product punching equipment, the punching mechanism is arranged, so that the problems that in the prior art, the positioning is not accurate, and the two sides of an aluminum alloy tube are prone to warping during punching are solved.

The invention discloses a protection treatment process for protective film cutting and rolling, and specifically relates to the technical field of protective film cutting and rolling, which includes the following processing steps: Step 1, firstly collect the waste materials produced by the protective film processing, clean them up and arrange them for standby; step 2. Before cutting the processed and rolled protective film, determine the position of the cutting knife, and then wrap the protective film waste sorted in step 1 outside the protective film to be cut, and correspond to the position of the lower knife ;Step 3: After the lower knife position of the protective film is wrapped and thickened by the waste protective film, the roll cutting machine is turned on, and a circular blade is used on the roll cutting machine to carry out the roll cutting work. Thick protective film waste, after the waste is removed, the protective film wrapped by the waste is intact. The invention adopts the process of wrapping the protective film with the protective film waste and then cutting it into rolls. The protective film can be cut into rolls directly by using a round knife. It is simple and easy to operate during use, and the cut rolls of the protective film do not warp.

The invention provides conductive paste for a solar cell, comprising metal powder, glass powder and an organic carrier, wherein, the metal powder comprises aluminum powder and one ore more of tungsten powder, molybdenum powder and gold powder. The conductive paste solves the problem that the solar cell is easily warped after sintering; the solar cell finally prepared from the conductive paste of the invention has higher photoelectric conversion efficiency; and the conductive paste has easily obtained raw material sources and less element pollution, thus lowering the cost to some extent. The invention further provides a preparation method of the paste. In the method, the tungsten powder, the molybdenum powder and the gold powder are simply added to the conductive paste or uniformly mixed with the glass powder after simple ball-milling and then added to the conductive paste to obtain the finished product through simple process without smelting and large-sized equipment. The invention has simple preparation process and low cost, thus being beneficial to mass production.

The invention relates to a preparing method of a long-chain nylon compound material for 3D printing. The preparing method comprises the following steps of preparing, by weight, 100 parts of long-chainnylon, 5-10 parts of kevlar chopped fiber, 5-15 parts of wollastonite, 0.1-0.3 part of coupler, 3-8 parts of flexibilizer, 0.5-1 part of hyperbranched resin and 0.2-1 part of antioxygen; spraying a coupling agent solution while stirring wollastonite, and conducting drying and cooling; uniformly mixing coupling-agent-modified wollastonite, the long-chain nylon, the kevlar chopped fiber, the flexibilizer, hyperbranched resin and antioxygen; adding a premixed raw material into a double-screw extruder for extrusion pelleting to obtain modified particles; adding the dried modified particles into asingle screw extruder to extrude out a plastic melt, and conducting hot water and cold water treatment to obtain wires. The preparing method is suitable for large-batch production, the prepared printing product has no obvious exposed fiber, the stretching strength, the bending strength and the thermal deformation temperature are high, and the size is stable.

The invention provides an anti-tilting device and a pipe jacking system. The device comprises at least two arc-shaped bodies, at least two resistance reduction mechanisms and two fastening mechanisms, the arc-shaped bodies are sequentially and detachably connected to form an annular structure with an opening, and the annular structure is arranged at the joint of two adjacent cylindrical bodies in a sleeving mode. The bottoms of the two cylindrical bodies are movably arranged on a guide rail; and the resistance reduction mechanisms are arranged on the inner sides of the arc-shaped bodies in a one-to-one correspondence mode and make contact with the cylindrical bodies so that resistance can be reduced when the two cylindrical bodies move. The two fastening mechanisms are detachably connected with the two arc-shaped bodies arranged at the opening of the annular structure in a one-to-one correspondence mode, and the two fastening mechanisms jointly act to enable the annular structure and the guide rail to be fastened so as to limit the two cylindrical bodies from tilting. According to the anti-tilting device and the pipe jacking system, the annular structure is arranged at the joint of the two adjacent cylindrical bodies in a sleeving mode, the annular structure and the guide rail at the bottoms of the cylindrical bodies are fastened through the combined action of the two fastening mechanisms, and therefore the two cylindrical bodies are continuously limited, and the two cylindrical bodies are prevented from tilting.

The invention relates to a long-chain nylon composite material for 3D printing. The long-chain nylon composite material for 3D printing comprises, by weight, 100 parts of long-chain nylon, 5-10 partsof kevlar short-cut fibers, 5-15 parts of wollastonite, 0.1-0.3 part of a coupling agent, 3-8 parts of a toughening agent, 0.5-1 part of hyperbranched resin and 0.2-1 part of an antioxidant. Wires andprinted products have no obvious fiber exposure, and the printed products also have the advantages of high tensile strength, high bending strength, high thermal deformation temperature and stable sizes.