73results about How to "Improve board quality" patented technology

Disclosed is an inkjet recording sheet having a colorant-receiving layer on the surface of its support, in which the colorant-receiving layer contains at least one of compounds represented by the following general formula (1) and compounds represented by the following general formula (2), and contains a vapor-phase-process silica, a polyvinyl alcohol, a boron compound, and a mordant. In the formulae, R represents a saturated hydrocarbon group having from 1 to 12 carbon atoms, an unsaturated hydrocarbon group having from 1 to 12 carbon atoms, a phenyl group, or an acyl group, and n indicates an integer of 1 to 3. <paragraph lvl="0"><in-line-formula>RO(CH2CH2O)nH (1) </in-line-formula><paragraph lvl="0"><in-line-formula>RO(CH2CH(CH3)O)nH (2) </in-line-formula>

The invention discloses a method for controlling and treating bottom roller dross of a carbon sleeve furnace. The possibility of dross occurrence is reduced by effective preventive measures for controlling the brushing current of a brush roller, reducing the use of a severely-oxidized transition strip, controlling appropriate furnace pressure, dew point and hydrogen content according to the difference of process speeds and process temperatures, periodically adjusting the rotating speed of a furnace roller, reducing running speed difference between the furnace roller and band steel, controlling the temperature raising and lowering rates of process temperature transformation during steel transformation and the like. Simultaneously, different treatment methods are used according to different dross states, so that treatment time is shortened greatly. The problems of long treatment time, single treatment method, no distinguished treatment according to different dross states, grinding of all furnace bottom rollers during treatment, damage to the furnace bottom rollers without dross, effect on service life and the like are solved, the plate surface quality of a cold-rolled and annealed product is enhanced and product percent of pass is increased.

A polyvinyl chloride polymer (PVC) composite material is described herein. The PVC composite material includes 40-60 parts by weight of PVC, 40-60 parts by weight of calcium carbonate, 0.2-0.6 parts by weight of composite foaming agent, 3-5 parts by weight of foam regulator, 2-4 parts by weight of toughener, 0.8-1.2 parts by weight of lubricant, and 2-3 parts by weight of stabilizer. Meanwhile, the present invention provides a foam board made of the PVC composite material and flooring. The resulting PVC products have a high-strength structure and a good foaming property, bring the comfort to feet as the resilient flooring does, have a satisfied sound reduction and can be easily installed as the hard flooring could.

The invention relates to the technical field of nonferrous metallurgy, in particular to a super-thick aluminum alloy cast-rolled plate production method for producing aluminum alloy cast-rolled plates through a horizontal cast-rolling machine. The super-thick aluminum alloy cast-rolled plate production method includes the steps of furnace charging, batching, melting through temperature rise, stir for slagging-off, sampling, furnace discharging, refinement through a holding furnace, slagging-off, online refinement, online degassing, filtration, cast rolling and reeling-up. The super-thick aluminum alloy cast-rolled plate production method has the advantages that distribution uniformity of a cast lip is improved, and temperature distribution is uniform; Al-5Ti-1B grain refinement filament adding technological parameters are reasonably determined; all rolling technological parameters are reasonably determined; fourth, qualified 11.5 mm thick and 1550 mm wide plates are successfully cast-rolled; the optimal ratio of cold material to liquid material for batching is reasonably determined; sixth, quality defects causing instable and unqualified thick plates are overcome; seventh, the limit of rolling thickness of the original design of a cast-rolling device is broken through.

The invention provides a method for eliminating edge squeezed-out resin of a buried-copper-coin PCB. The method comprises the following steps of S1, setting an operation parameter of a laser drilling machine according to the thickness and width of the resin which is squeezed out of the buried-copper-coin PCB; S2, performing firming on the squeezed-out resin around the buried-copper-coin PCB by means of the laser drilling machine according to the operation parameter; and S3, grinding a carbide generated after firing the squeezed-out resin around the buried-copper-coin PCB by the laser drilling machine and the residual squeezed-out resin, thereby eliminating the carbide and the residual squeezed-out resin from the PCB; and a step of checking whether residual squeezed-out resin exists at the periphery of the buried-copper-coin PCB, and repeating the steps S1 to S3 until the squeezed-out resin is totally eliminated. The method of the invention has advantages of efficiently eliminating the edge squeezed-out resin of the buried-copper-coin PCB, reducing board surface wearing of the PCB, improving quality of manufactured PCB, and reducing rejection rate of the PCB.

The invention discloses a three-dimensional mask plate for printing. The three-dimensional mask plate comprises a substrate, and a printing surface and a printed circuit board (PCB) surface, which are arranged on two sides of the substrate, and the mask plate is provided with a plurality of graphic openings and a three-dimensional structure, and the three-dimensional structure comprises a projection area on the printing surface and a concave area on the PCB surface. The mask plate is provided with the three-dimensional projection part and the three-dimensional concave part, the projection height is 0.1 to 10mm, the concave depth is 0.1 to 10mm, and angles formed between the projection part and the plate surface and between the concave part and the plate surface are 80 to 90 DEG; the composition of the mask plate is 56 to 62 percent of iron and 38 to 44 percent of nickel, and the mask plate is high in precision; the mask plate is high in uniformity, good in plate surface quality, bright and free from rough spots, scratches and pin holes; the opening quality is good, and the hole wall is smooth and free from burrs; and the mask plate is low in production cost, simple in process and low in energy consumption.

A polyvinyl chloride (PVC) laminated soft sheet is prepared by the following raw materials by weight ratio: 90-110 of PVC resins, 15-20 of calcium carbonate, 30-40 of plasticizers, 3-4 of tribasic copper sulfate and 10-12 of paraffins. The laminated soft sheet is prepared by low toxic materials, has similar properties with the extrusion soft sheets, is widely used as a waterproof and anticorrosive material and can be also used as a flooring material. The laminated soft sheet has the following advantages: the sheet quality is superior to that of the extrusion soft sheets, and the laminated soft sheet can also use the recycled materials or reclaimed materials as the inner layer to lower the cost. The length specification of the laminated products is often limited by the size of the press.

The present invention relates to a three-layer structure wooden composite plate material and its production method, belonging to the field of building decorative technology. Said composite plate material is formed from surface layer and core layer, in which the core layer material formed from flat structure unit adopts wood material, bamboo material and straw, and said flat structure unit size is: length 45-110 mm, width 10-50 mm and thickness is 0.1-1 mm, and the thickness of core layer is 21-91% of that of plate material. Said surface layer material is made up by selecting fibre or particle structure unit, and adopting the procedures of preparing material, laying-forming, pre-pressing and hot-pressing. The adhesive used by core layer is isocyanate adhesive. Said invention also provides the steps of laying, forming process.

The invention belongs to the technical field of cold-rolling sheet processing, and particularly relates to a cold-rolling sheet soft-state slitting guiding device. The device comprises supporting seats, a guiding polish rod, transmission lead screws, a lead screw connecting tube, guiding upright rollers, upright roller supporting frames, hand wheels and pressing modules, each of the two ends of the guiding polish rod is provided with a supporting seat, the guiding polish rod is fixedly connected with the supporting seats, the hand wheels are arranged on the outer sides of the supporting seats,each of the two ends of the lead screw connecting tube is provided with an upright roller supporting frame, the upper ends of the sides of the upright roller supporting frames are slidably installedon the guiding polish rod, the upright roller supporting frames are in threaded connection with the transmission lead screw, the guiding upright rollers are perpendicularly installed in the upright roller supporting frames, the pressing modules are arranged at both upper and lower ends of the guiding upright rollers, and the pressing modules are slidably installed on the upright roller supportingframes. According to the device, by using the pressing modules, it is ensured that cold-rolling sheets do not off track before entering a slitting knife shaft, and the protruding of the cold-rolling sheets is prevented.

The invention discloses a mask plate for printing, which comprises a substrate, a printing surface and a PCB (Printed Circuit Board) surface, wherein the printing surface and the PCB surface are positioned on both sides of the substrate. The mask plate is provided with a plurality of pattern openings and a three-dimensional structure; and the three-dimensional structure comprises a convex region on the printing surface and a concave region on the PCB surface. The mask plate is provided with three-dimensional convex and concave parts, and a convex height is 0.1 to 10 mm while a concave depth is 0.1 to 10 mm; the outer included angles between the convex and the concave parts and the plate surface are 80 degrees to 90 degrees; the mask plate comprises the following components: 40 percent to 55 percent of iron and 45 percent to 60 percent of nickel; and the mask plate has high accuracy, high uniformity and high plate surface quality, is bright and has no coarse points, scratches or pinholes; the openings have high quality, smooth opening walls, and no burrs; and the mask plate is low in production cost and has simple process and low energy consumption.

A hybrid production process and a step stencil produced by using the process. The hybrid production process is as follows: electroforming a first electroformed layer; electroforming the up step area on a PCB surface; and etching a down step area on a printing surface. The hybrid production process is characterized by comprising two techniques of electroforming and etching. The stencil produced by the process has external characteristics of: the PCB surface having up steps, and the printing surface having down steps and having an opening pattern. According to the metal stencil, the produced electroformed layer of the up step area has a relatively high bonding strength with the plane electroformed layer; the produced entire electroformed stencil has smooth opening walls, good surface quality and has no pinholes or pittings; the thickness uniformity of the opening pattern area of the produced entire electroformed stencil is good; and a special spreader plate used in the second electroforming process can effectively reduce the current density, thereby reducing the edge effect of the up step area.

A production process for an electroformed stencil. The process flow is as follows: electroforming a first electroformed layer: core mold treatment -> pre-treatment (degreasing, pickling and sandblasting 1) -> film mounting 1 -> exposure 1 -> single sided developing 1 -> electroforming 1-> film stripping -> mold stripping; and electroforming up steps on a printing surface: printing surface pre-treatment (pickling and sandblasting 2) -> film mounting 2 -> exposure 2 -> single sided developing sided 2 -> electroforming 2 -> film stripping. By using the process, the electroformed stencil having an up step area on the printing surface, wherein the up step area has an opening pattern, can be produced. The stencil has the following advantages: deposition thickness uniformity COV of the stencil is 10% or less; the stencil surface has good quality, grade-one surface brightness, no pinholes or pitting; the binding strength between the up step area and the first electroformed layer is large, without the proneness of falling off; and the position precision of the pattern opening area of the up steps with the opening area of the first electroformed layer is high.

A hybrid production process for a step stencil. The production process flow is as follows: electroforming a first electroformed layer: core mold treatment -> pre-treatment (degreasing, pickling and sandblasting) -> film mounting 1-> film exposure 1-> single sided developing 1-> electroforming 1-> film stripping -> mold stripping; etching a printing surface to form a down step area: printing surface film mounting-> exposure 2-> single sided developing 2 -> etching (forming the down step area on the printing surface); and laser cutting the opening pattern of the down step area: an electroformed stencil with a down step area->laser cutting the opening pattern of the down step area->subsequent processing. By using the production process of the invention, the stencil having the printing surface with the down step area can be produced; the openings of the pattern areas of the substrate and the down step area has good quality, smooth hole walls and no blurs; the stencil surface has good quality, first class brightness surface, and no pinholes or pittings; the position precision of the opening area of the down step area pattern and the opening area of the electroformed area is high; and the thickness uniformity of the electroformed stencil pattern area is good.

A machine for the formation of numbered packs of interleaved sheets of paper (6), includes a pair of counter-rotating motor-driven folding rollers (2,3), an interference surface (11) mobile with a to-and-fro motion between a position (P1) of non-interference and a position (P2) of interference, and a mechanism (36) of cyclic movement of the surface (11) including at least one supporting crank (13) oscillating with respect to the carriage (26) and articulated to a first axis (15) of rotation of the surface, and a first motor-driven connecting rod (19) kinematically connected to the surface (11) to bestow the to-and-fro motion thereon.

The invention discloses 8K mirror board manganese nitrogen series nickel-saving austenitic stainless steel, and relates to the technical field of stainless steel. The austenitic stainless steel comprises, by mass, 0.15% or less of C, 0.45% or less of Si, 10% or less of Mn, 0.055% or less of P, 0.003% or less of S, 0.16% or less of N, 12%-18% of Cr, 1.00%-3.00% of Ni, 0.2%-2% of Cu and the balance Fe. Meanwhile, the invention further provides a preparation method of the 8K mirror board manganese nitrogen series nickel-saving austenitic stainless steel. By controlling the components and the preparation process of the austenitic stainless steel, the white-skin roll with the low Ra value (Ra is smaller than or equal to 2.8 microns) can be obtained, the surface of the white-skin roll is uniform, the defects such as second-class peeling and hot cracking do not exist, and the production speed and the surface quality of subsequent mirror board finish machining and grinding can be effectively improved.

The invention provides a combined type cold-rolled stretching-bending straightener, and belongs to the technical field of withdrawal and straightening equipment. The combined type cold-rolled stretching-bending straightener comprises a turning roller, an inlet tensioning roller set, a multi-roller straightening system, a stretching and straightening roller system, roller boxes, a machine frame, abending roller set, a straightening roller set, an outlet tensioning roller set and an elevator. The turning roller, the inlet tensioning roller set, the multi-roller straightening system, the stretching and straightening roller system, the bending roller set, the straightening roller set and the outlet tensioning roller set are sequentially arranged in the conveying direction of strip steel, themulti-roller straightening system, the stretching and straightening roller system, the bending roller set and the straightening roller set are installed on the machine frame, and the multi-roller straightening system, the stretching and straightening roller system, the bending roller set and the straightening roller set are provided with the roller boxes and the lower parts of the multi-roller straightening system, the stretching and straightening roller system, the bending roller set and the straightening roller set are connected with the elevator through lifting synchronous connecting rods.The combined type cold-rolled stretching-bending straightener can improve the scale breading effect on the surface of the strip steel, improve the acid pickling efficiency, reduce the acid consumptionamount in an acid pickling technology, can effectively improve the wear degree, reduce the risk of excessive withdrawal and straightening of welding lines, reduce the enterprise cost, and improve thesafety of equipment operation.

The invention discloses an electroforming nickel-ferrum alloy screen with high ferrum content for printing and a preparation method. An opening graphics area according with printing requirements is arranged on the surface of the screen. The nickel-iron alloy contains nickle Ni element and ferrum Fe element, and the mass percents of each element are: Ni:45-60% and Fe: 40-55%. A metal screen with high ferrum content for printing with high hardness, good screen surface brightness and good coating surface quality can be obtained. The nickel-ferrum alloy screen is low cost and saves energy compared to an electroforming nickel metal screen. The nickel-ferrum alloy screen has high opening precision. In addition, the nickel-ferrum alloy screen converts waste impurity ferrum into an alloy constituent, and reduces the solution maintenance cost and the burden of three-waste treatment.

A production process for a step stencil by using an electroforming method. The specific process flow is as follows: electroforming a first electroformed layer: core mold processing -> pre-treatment (degreasing, pickling and sandblasting) -> film mounting 1 -> exposure 1 -> single sided developing 1 -> electroforming 1; electroforming an up step area on a PCB surface: pre-treatment (pickling and sandblasting) -> film mounting 2 -> exposure 2 -> single sided developing 2 -> electroforming 2 -> film stripping; electroforming a second electroformed layer (forming a down step area on a printing surface): printing surface film mounting -> exposure 3 -> single sided developing 3 -> electroforming 3 -> film stripping -> mold stripping -> subsequent treatment (degreasing and pickling). By using the process, the electroformed stencil having the PCB surface with up steps and the printing surface with up steps, wherein the up step areas has an opening pattern, can be produced. The openings of the pattern areas of the substrate and the step area have good quality, smooth hole walls and no blurs; the stencil surface has good quality, first class brightness, and no pinholes or pittings; the position precision of the opening area of the step area pattern and the opening area of the first electroformed layer is high; the binding strength between the up step area and the substrate is large, without the proneness of falling off; the thickness uniformity of the pattern areas of the electroformed stencil is good.