92results about How to "High surface flatness" patented technology

The utility model discloses a corrosion-resistant metal lining socket type multilayer pipe, which belongs to the technical field of pipes and comprises an inner pipe, a middle layer and an outer pipe which are sequentially sleeved from inside to outside, steps and / or grooves are arranged on the inner wall of a socket end, and the inner pipe, the middle layer and the outer pipe are adhered to form the pipe or compressed to form the pipe. The outer pipe comprises a socket end, a pipe body and a spigot end which are connected in sequence, the outer pipe is made of metal, the inner pipe is made of a corrosion-resistant material, each end of the pipe is provided with a sealing layer and a lining ring made of a corrosion-resistant metal material, and the length of each lining ring extending into the pipe is not less than 20mm. The anti-corrosion pipeline is good in anti-corrosion effect, and the water conveying efficiency of the pipeline is improved. The corrosion-resistant metal lining ring prevents each layer of material from being stripped; and the strength and the deformation resistance of the pipe are improved.

The invention provides a display device and a manufacturing method thereof, the display device comprises a supporting layer, an adhesive layer, a protective film, a display panel, a polarizing layer, an optical adhesive layer and a cover plate which are sequentially stacked, and the supporting layer is a composite material layer formed by hot pressing of a metal layer and a carbon fiber layer; according to the flexible module, the supporting layer is arranged to be the composite material layer of the metal layer and the carbon fiber layer, the surface flatness of the flexible module can be improved, and meanwhile due to the fact that the rigid material such as the metal layer is added, the front face impact resistance of the module can be improved; the thickness of one adhesive layer can be removed, the purpose of module thinning is achieved, the composite adhesive force between the metal layer and the carbon fiber layer is better than the effect that the metal layer and the carbon fiber plate are assembled through single body attachment, and the risk of module stripping can be reduced. According to the display device and the manufacturing method thereof, the structure is simple, manufacturing is convenient, stability is high, cost is low, the product weight can be effectively reduced, and meanwhile the display effect is improved.

The invention discloses a preparation method of an anti-dazzle lamp strip, and relates to the technical field of illuminating lamp strips. The anti-dazzle lamp strip comprises a lamp body, the lamp body comprises a light diffusion layer, shading layers arranged on the two sides of the light diffusion layer, a lamp body shell arranged outside the shading layers and anti-dazzle pieces, and anti-dazzle piece grooves are formed between the top of the light diffusion layer and the top ends of the two shading layers. The anti-dazzle sheet can be sealed in the lamp body by adopting a processing method which is realized by one-time co-extrusion, two-time co-extrusion or extrusion sleeve type, the defects that the effect is influenced by easy fading, falling and dust accumulation in the existing lamp strip anti-dazzle process are overcome, and the processed light-emitting surface layer is good in sealing performance and high in surface flatness, no hole is formed in the surface, and the service life of the light-emitting surface layer is prolonged. The anti-dazzle sheet with the latticed through holes prevents light rays emitted by the LED lamp beads from being scattered to the periphery, a low UGR value is obtained, and the anti-dazzle effect is achieved.

The invention provides a crystalline silicon solar cell metal grid line preparation method, a crystalline silicon solar cell and a photovoltaic module, and relates to the technical field of crystalline silicon solar cells. The preparation method comprises the following steps: printing a plurality of first sub-grid lines arranged in rows or columns by using a knotless screen printing plate, and curing to obtain a first target battery piece; and overprinting a second sub-grid line on each first sub-grid line by adopting a full-opening steel plate, curing and sintering. The first sub-grid lines are printed by adopting a knotless screen printing plate, and then the second sub-grid lines are overprinted by adopting a full-opening steel plate, so that the height-width ratio of the metal grid lines can be improved; the second sub-grid line is overprinted by using the full-opening steel plate, so that the shaping of the metal grid line can be assisted, the surface flatness of the metal grid line is optimized, the broken grid is reduced, the contact resistance is reduced, the formation of high-quality ohmic contact is promoted, a better narrow-line-width design space can be obtained, and the consumption of silver is reduced while the shielding of a light absorption area is reduced; and the production cost of the battery is effectively reduced.

The invention relates to a glass fiber reinforced plastic continuous production line and a production method, and relates to the field of glass fiber reinforced plastic production equipment.The glass fiber reinforced plastic continuous production line comprises a bottom film feeding and gluing unit, a lower surface mat laying and gluing mechanism, an upper-layer fiber laying and infiltrating mechanism, a glue supplementing and laminating unit, a heating and curing unit and a trimming and cutting unit; the bottom film feeding and gluing unit is used for guiding a bottom film and blade-coating a layer of gel coat on the bottom film, the lower surfacing mat laying and gluing mechanism is used for laying a lower surfacing mat on the gel coat and coating resin glue on the lower surfacing mat, the upper-layer fiber laying and infiltrating mechanism is used for laying a main fiber layer and an upper surfacing mat on the lower surfacing mat and infiltrating the resin glue, and the lower-layer fiber laying and infiltrating mechanism is used for laying the main fiber layer and the upper surfacing mat on the upper-layer fiber laying and infiltrating the resin glue. The glue supplementing and laminating unit supplements resin glue on the upper surfacing mat and then paves a top film, the top film is output after being heated and cured by the heating and curing unit and trimmed and cut by the trimming and cutting unit, and the quality of glass fiber reinforced plastic products can be guaranteed. The invention further discloses a glass fiber reinforced plastic continuous production method.

The invention relates to metal plate rolling equipment which comprises a left fixed roller and a right fixed roller which are symmetrically arranged, a multi-layer rolling structure is adopted, through the synergistic effect of the left fixed roller, the right fixed roller and a middle adjusting roller and in combination with an upper left roller, a lower left roller, an upper right roller and a lower right roller which are arranged up and down, precise step-by-step rolling on a metal plate is achieved, and the rolling precision of the metal plate is improved. Through the dynamic pressure and curvature adjusting system, the pressure distribution and the contact state between the upper roller and the lower roller can be adjusted in real time according to the material, the thickness and the process requirements of a to-be-machined plate through the upper adjusting roller, the lower adjusting roller, the matched upper adjusting mechanism and the matched lower adjusting mechanism, and the problem of insufficient rolling caused by overpressure fracture or underpressure is effectively solved; the left detection heating mechanism and the right detection heating mechanism integrate an electromagnetic ultrasonic nondestructive testing technology and an induction heating technology, so that nondestructive testing of internal defects of a plate can be achieved in the rolling process, and local or overall efficient heating can be conducted according to needs.

The invention relates to a liquid crystal dimming film with a ceramic hardened coating, and relates to the technical field of liquid crystal dimming films, the liquid crystal dimming film comprises a liquid crystal dimming film and a ceramic hardened coating, and the ceramic hardened coating is obtained by coating ceramic water paint. The ceramic water paint is prepared from the following raw materials in parts by mass: 40-60 parts of organic-inorganic composite silicon resin,-8 parts of anti-reflection nano filler, 2-5 parts of wear-resistant filler, 1-2 parts of bulking agent, 20-30 parts of anti-reflection film-forming resin, 1-3 parts of dispersing agent, 0.5-1 part of defoaming agent, 0.5-1 part of flatting agent and 30-50 parts of water. The liquid crystal dimming film has the effects of improving the hardness, the light transmittance and the weather resistance of the ceramic hardened coating, and the prepared liquid crystal dimming film with the ceramic hardened coating is resistant to scraping and abrasion and can keep good working performance for a long time.

The present invention relates to the field of chip packaging technology, and specifically discloses a fan-out type packaging embedding method, comprising the following steps: step S12: embed the chip to be packaged into the groove of the fan-out substrate, and deposit a parylene dielectric layer on the upper surface of the chip, the gap between the side of the chip and the side wall of the groove; step S13: form a metal layer on the parylene dielectric layer; step S14: use the metal layer as a mask and use a dual damascene process; repeat steps S13-S14n times in sequence to form n layers of wiring in the parylene dielectric layer, wherein n≥1, and each layer of wiring is connected to pads at different positions on the chip or to different positions of the fan-out substrate. The parylene dielectric layer of the present invention has a good gap filling effect, basically no bubbles and cavities are generated inside, and the surface flatness is high, the process stability is high, the process compatibility is good, and the wiring layer stress can also be reduced.

The invention provides a proton exchange membrane as well as a preparation method and application thereof. The proton exchange membrane comprises a first perfluorinated sulfonic acid resin layer, a microporous enhancement layer and a second perfluorinated sulfonic acid resin layer which are sequentially stacked, wherein the EW value of the first perfluorinated sulfonic acid resin is 600 to 800, and the EW value of the second perfluorinated sulfonic acid resin is 900 to 1100. Proton exchange membranes with different water retention rates are prepared by arranging perfluorinated sulfonic acid resins with different EW values on the two sides of the microporous enhancement layer, the proton exchange membranes with the corresponding water retention rates can be directionally selected according to the use working conditions, the water management capability of membrane electrodes is effectively regulated and controlled, meanwhile, a leveling process is added, the surface flatness of the proton membranes can be effectively improved, and the membrane electrode quality is improved. And the contact resistance between the proton membrane and the catalyst layer can be reduced.

The utility model discloses a bar surface smoothness polishing mould frame, which relates to the technical field of bar processing, and comprises a fixed base, the rear side of the upper end of the fixed base is fixedly connected with an inner side fixed frame, the upper ends of the two sides of the inner side fixed frame are fixedly connected with turnover frames, a turnover driving shaft is rotatably arranged between the turnover frames on the two sides, and the turnover driving shaft is fixedly connected with the inner side fixed frame. An indexing driver is fixedly installed on the outer side of the overturning frame on one side, an output shaft of the indexing driver penetrates through the overturning frames and then is fixedly connected with an overturning driving shaft, and bars are continuously fed into the bar clamping notches in the upper side through conveying equipment and then overturned. After being ground, the workpiece directly falls into the roll-out roller set on the lower side to be conveyed to corresponding conveying equipment to be conveyed out, continuous polishing machining can be carried out, the structure is simple, design is reasonable, operation is convenient and fast, the problem that lathe resources are occupied for a long time in a traditional polishing method can be effectively solved, normal use of other equipment is not affected, and the production efficiency is greatly improved.

This disclosure provides a polishing pad and a final polishing apparatus. The polishing pad includes: a substrate; and a deformable unit disposed on the substrate. The deformable unit is capable of switching the polishing pad between a first shape mode and a second shape mode by deformation. In the first shape mode, the polishing surface of the polishing pad has grooves, and in the second shape mode, the polishing surface of the polishing pad is flat.

The invention provides a preparation method of a multipurpose low-cost lithium battery electrode material section, and belongs to the technical field of new energy battery material characterization. According to the invention, different fixing modes are developed in consideration of different requirements of the cross section of the lithium battery electrode material for off-site characterization and in-situ observation; the method can meet the requirement for section observation of diversified lithium battery electrode materials, operation is easy, the machining success rate is high, and the machining cost is reduced. Experimental results show that the section of the lithium battery electrode material prepared by the preparation method of the section of the lithium battery electrode material is flat and smooth, and cracks and morphology in particles are clear and visible; the processed sample can be directly used for shooting a high-quality scanning electron microscope image and performing energy spectrum analysis, so that further statistics and analysis on the failure form of the electrode material by utilizing artificial intelligence algorithms such as machine learning are facilitated; and in addition, the device can be assembled into a battery in-situ observation device for electrode material cycle test and structure real-time evolution observation.

The utility model discloses a roof sealing waterproof reflective thermal insulation integrated structure which comprises a waterproof sealing layer formed by coating self-energy long-acting waterproof paste on a base surface, a reinforcing layer paved on the waterproof sealing layer, and a reflective thermal insulation waterproof coating layer formed by coating reflective thermal insulation waterproof coating on the outermost layer and drying the reflective thermal insulation waterproof coating. The purpose of heat insulation is achieved through the anti-ultraviolet performance and the light reflection performance of the reflective heat-insulation waterproof coating layer on the outermost layer, and the self-energy long-acting waterproof paste on the bottom layer not only can play a role in improving the bonding force between the reflective heat-insulation waterproof coating and a base plane, but also can be bonded with various material interfaces. And the waterproof material has a creep anti-cracking sealing waterproof effect, a cement protection layer is omitted, and the waterproof material is particularly suitable for waterproofing of metal roofs with light bearing capacity.

The invention relates to an etching solution for a quartz crystal. The etching liquid is prepared from the following components in percentage by mass: 20% of hydrofluoric acid, 15% of nitric acid, 0.15-0.7% of an additive and the balance of ultrapure water. The four-component additive is prepared from sodium butyl naphthalene sulfonate, PE6400, 1-butyl-3-methylimidazolium tetrafluoroborate and 4-mercaptobutyric acid. Wherein the sodium butylnaphthalenesulfonate prevents particles generated in the etching process from being gathered and deposited, and the clearness and uniformity of the etching liquid are kept. PE6400 has both hydrophilicity and hydrophobicity, and has the effects of assisting in dissolving, dispersing and defoaming. The cooperation of the two can significantly reduce the residual protrusions after the quartz crystal is etched, reduce the roughness, and make the surface smoother. The 1-butyl-3-methylimidazolium tetrafluoroborate and the 4-mercaptobutyric acid cooperate to control lateral erosion of quartz, and a symmetrical V-shaped structure is generated.

The utility model provides a kind of magnetic core assembly and electronic equipment, it is related to magnetic sensing technical field.The magnetic core assembly includes package and multiple magnetic cores, and gap is provided between adjacent two magnetic cores;Package is covered in the periphery of at least part magnetic core and is filled in gap;Wherein, magnetic core and package are integrally formed structure.Multiple magnetic cores and package can be equivalent to one module component, realize quick assembly, improve assembly efficiency.Package is filled in the gap between adjacent two magnetic cores, so that the side surface of magnetic core can be closely attached to package, while ensuring the connection strength, reduce thermal resistance, improve heat dissipation capacity, and also improve the surface flatness of magnetic core assembly overall to some extent. When package and magnetic core are formed into complete module component by being covered in the periphery of at least part magnetic core, the deformation generated during installation can be reduced, high-precision size control is realized, and the overall strength and assembly accuracy of magnetic core assembly are improved.

The present invention discloses a cutting device, including a frame, a platform, a tool holder, and a cutter; the platform is movably arranged in the frame, a platform driving source is arranged at the bottom of the platform, and the platform driving source can drive the platform to rise and fall back and forth in the Z-axis direction; the tool holder is slidably arranged at the top of the frame, the tool holder is connected to the tool holder driving source, and the tool holder driving source drives the tool holder to slide horizontally in the X-axis direction; the cutter is slidably arranged at the bottom of the tool holder, the cutter is connected to the cutter driving source, and the cutter driving source drives the cutter to slide back and forth in the Y-axis direction, and the cutter is inclined with respect to the horizontal plane. The present invention ensures the flatness of the product cutting surface, improves the cutting utilization rate of the product, and ensures the thickness of the cut product.

The invention discloses a coating die head, and relates to the technical field of material coating equipment, a first filter screen is arranged at a feeding hole of the coating die head, the first filter screen covers the feeding hole, a second filter screen is arranged at a discharging channel of the coating die head, and the second filter screen covers the discharging channel; the first filter screen is used for mixing materials entering the coating die head through the feeding hole, and the second filter screen is used for mixing materials flowing out of the discharging channel. The first filter screen is arranged at the feeding hole of the coating die head, and the second filter screen is arranged at the discharging channel, so that materials entering and flowing out of the coating die head can be mixed under the action of the filter screens on the materials. Therefore, the problem of non-uniform mixing of the coating and water is effectively solved, and the defect of non-uniform distribution of coating components in the coating process due to precipitation and layering of the coating in the prior art is overcome.

The invention discloses a ZrN tritium-resistant coating and a preparation method thereof, and relates to the technical field of coatings. According to the preparation method of the ZrN tritium-resistant coating, Zr serves as a target material, nitrogen serves as reaction gas, and the ZrN tritium-resistant coating is deposited on the surface of a base body through magnetron sputtering. The invention provides the preparation method of the ZrN coating with high crystallinity and good tritium blocking effect for the solid tritium breeding cladding.

The invention belongs to the technical field of glass processing, and relates to an acid-resistant protective film liquid for ultrathin glass edge processing, and a preparation method and application thereof. The acid-resistant protective film liquid comprises the following components in parts by mass: 100 parts of phenolic resin with different molecular weights; 25 to 35 parts of acrylic resin; 5.1-10 parts of an additive; the additive comprises a flatting agent and a tackifier; and 520-560 parts of a solvent. The preparation method comprises the following steps: mixing phenolic resins with different molecular weights, mixing with a solvent, and heating and stirring until the phenolic resins are completely dissolved to obtain a phenolic resin solution; mixing acrylic resin with a solvent, heating and stirring until the acrylic resin is completely dissolved to obtain an acrylic resin solution; mixing the phenolic resin solution and the acrylic resin solution to obtain a mixed resin solution; and mixing the additive with the mixed resin solution, and uniformly stirring to obtain the acid-resistant protective film solution. The problems of film thickness uniformity and poor base material adhesion of the acid-resistant protective film liquid are effectively solved, and the stability of the acid-resistant protective film liquid is improved.

The invention discloses a manufacturing method of a semi-floating gate device, and the method comprises the steps: 1, depositing a semi-floating gate polycrystalline silicon layer on a bottom layer structure, and enabling the top surface of the semi-floating gate polycrystalline silicon layer to be uneven; and 2, performing hydrogen treatment on the surface of the semi-floating gate polycrystalline silicon layer, and improving the moving capability of silicon atoms by using the hydrogen treatment so as to improve the flatness of the top surface of the semi-floating gate polycrystalline silicon layer. And step 3, carrying out ion implantation on the semi-floating gate polycrystalline silicon layer and carrying out annealing activation. And 4, performing maskless etching on the semi-floating gate polycrystalline silicon layer to reduce the thickness of the semi-floating gate polycrystalline silicon layer to a set value. According to the invention, the surface flatness of the semi-floating gate polycrystalline silicon can be improved, so that the performance of a device is improved.

The utility model relates to a hanging plate workbench which comprises a workbench plate, a supporting assembly and a vertical plate, the supporting assembly comprises a bearing plate and supporting feet, the supporting feet are fixed below the bearing plate to form a rack, the workbench plate is fixedly installed on the bearing plate, the vertical plate is vertically installed on the side face of the workbench plate, the workbench further comprises a straightening device, the workbench plate is a wooden plate, and the straightening device is arranged on the workbench plate. The straightening device is in a cross shape and is fixed below the working table plate. The straightener is fixedly used below the working table plate, so that the possibility of deformation of the working table plate in the using process is reduced, and the surface flatness of the working table plate is improved.

The invention provides an anti-dazzle lamp strip and a preparation method thereof, and relates to the field of illuminating lamp strips, the anti-dazzle lamp strip comprises a plurality of lamp strip groups which are electrically connected end to end in sequence, and each lamp strip group comprises a lamp body; the lamp body comprises a light diffusion layer, light shielding layers arranged on the two sides of the light diffusion layer, a lamp body shell arranged outside the light shielding layers and an anti-dazzle piece. The anti-dazzle sheet can be sealed in the lamp body in a rapid assembly mode, and the defects that according to an existing lamp strip anti-dazzle technology, fading and falling are prone to occurring, and the effect is affected by dust accumulation are overcome; according to the LED lamp panel, an assembling mode is adopted on the whole, the modes such as bonding are avoided, the practicability of the LED lamp panel is improved in the use stage, meanwhile, based on the structural composition, the heat exchange area and the heat exchange space are increased through the arrangement of the T-shaped sliding ways, the expansion ports and the lamp panel grooves in the structural composition, meanwhile, the mode of attaching the LED lamp panel is avoided, and heat dissipation of the LED lamp panel is facilitated.

The application relates to the technical field of insulator manufacturing, and discloses a roughing device for an electric porcelain insulator blank, which comprises a rack, a mold is rotationally connected to the upper surface of the rack, and a lifting frame is slidably connected to the outer surface of the rack; an adjusting shaft is rotationally connected to the outer surface of the lifting frame, a first roughing cutter and a second roughing cutter are fixedly connected to one end of the adjusting shaft, and a first adjusting assembly is arranged at the other end of the adjusting shaft and used for controlling the rotating angle of the adjusting shaft. The roughing device for the electric porcelain insulator blank can effectively solve the problem that, when the cutting amount of the blank is large, the cutting resistance of the roughing cutter is large, the roughing cutter vibrates, scratches, unevenness, burrs and other defects appear on the surface of the blank, the surface flatness is reduced, the size precision of the electric insulator blank is reduced, and the electrical performance and appearance of the insulator are affected.

The invention belongs to the technical field of integrated circuit manufacturing, and particularly relates to a preparation method of a SiCN diffusion barrier layer, and the SiCN diffusion barrier layer is prepared from trimethylsilane, deuterated ammonia and disilane through a plasma vapor deposition method. The deuterated ammonia can influence the microstructure and composition of the material in the process of participating in the preparation of the SiCN diffusion barrier layer, so that the defect degree is lower after annealing treatment. Meanwhile, the introduction of disilane promotes the uniform distribution of each reaction gas in the chamber, and reduces the local concentration difference, thereby enabling the surface of the barrier layer to be smoother and smoother, and effectively improving the surface flatness of the barrier layer.

The present invention relates to a hydroxypropyl methylcellulose modified additive composition specially used for gypsum-based self-leveling mortar and a preparation method thereof, and belongs to the technical field of hydroxypropyl methylcellulose. A hydroxypropyl methylcellulose modified additive composition specially used for gypsum-based self-leveling mortar comprises the following components in parts by mass: 100 parts of hydroxypropyl methylcellulose, 0.06-0.25 parts of lithium sulfate, and 0.12-0.62 parts of sodium gluconate. The present invention modifies hydroxypropyl methylcellulose by a modifier screened out through a large number of experiments, thereby preparing an additive composition mainly containing hydroxypropyl methylcellulose specially used for gypsum self-leveling mortar. After being applied to gypsum-based self-leveling mortar, it has a great improvement effect on the workability, compression resistance, flexural strength, suspension and other properties of the self-leveling mortar.

The invention relates to the technical field of reverse osmosis, and discloses a method for preparing a glass fiber layer of a reverse osmosis membrane element. The method is carried out in a winding device for a reverse osmosis membrane element, and comprises the following steps: infiltrating glass fiber gridding cloth in a sealant to obtain glass fiber gridding cloth I, and winding the glass fiber gridding cloth I to enable the glass fiber gridding cloth I to be wound on the surface of the reverse osmosis membrane element; the mesh size of the glass fiber gridding cloth is not larger than 100 mm < 2 >, the gram weight is not larger than 500 g / m < 2 >, and the mesh diameter is not larger than 3 mm; the winding treatment conditions at least comprise that the number of winding turns is 4-7, the winding speed is 5-20 rpm, and the temperature is 10-30 DEG C. The glass fiber gridding cloth with specific parameter types is continuously wound on the outer layer of the reverse osmosis membrane element after being soaked in the large-width glue tank, and the method has the advantages of being easy to operate, short in processing period, high in efficiency and controllable in quality.

The invention discloses a low-activation ferrite martensitic steel self-oxidation film, a preparation method and application, and relates to the technical field of fusion reactor cladding structure materials. Comprising the following steps that a low-activation ferrite martensitic steel substrate is ground, polished and cleaned; vacuumizing the vacuum heating system and carrying out empty burning; after the empty burning is finished and the vacuum heating system is cooled to room temperature, putting the substrate into a sample chamber of the vacuum heating system and sealing; the sample chamber is vacuumized to enable the vacuum degree to reach 1.0 * 10 <-7 >-1.0 * 10 <-3 > Pa, the heating temperature is 500-700 DEG C, heat treatment is conducted for 1-15 days under the condition, and the self-oxidation film is prepared on the surface of the low-activation ferrite martensitic steel; the prepared self-oxidation film has good tritium permeation resistance, the preparation method of the self-oxidation film is simple, and compared with a tritium permeation resistance coating preparation method in the prior art, the cost is lower.

The utility model discloses an annealing device which is characterized in that an annealing furnace is arranged on a frame, a plurality of passing rollers, a tension roller and a floating assembly are arranged on the incoming material side of the annealing furnace, a flattening roller and a traction assembly are arranged on the discharging side of the annealing furnace, and a heating module is arranged in the annealing furnace; a plurality of horizontal first heating assemblies and a plurality of horizontal second heating assemblies are arranged on a cover body of the heating module, a lifting structure is connected to the cover body, and the height of the heating module can be adjusted through the lifting structure. The heating module with the adjustable height is arranged in the annealing furnace, so that the thin film is heated more uniformly, local overheating or supercooling is avoided, the uniformity of annealing stability is ensured, the annealing effect is improved, the internal stress of the thin film is eliminated more thoroughly, and the dimensional stability of the thin film is ensured.

This application discloses a casting formwork for the top of a structural column, relating to the technical field of structural column construction. It includes a base, a casting hopper, a baffle, a guide plate, and a slide rail. The base has a casting opening, and the casting hopper is located on one side of the casting opening, having a casting groove. The slide rail is mounted on the base, and the baffle is slidably connected to the slide rail. The casting hopper has a clearance opening for the baffle to slide through, and the portion of the baffle in the casting groove can cover the casting opening. The guide plate is located in the casting groove, with one end rotatably connected to the casting hopper. The rotation axis of the guide plate is perpendicular to the sliding direction of the baffle, and the other end of the guide plate abuts against the end of the baffle near the casting groove. This application can significantly reduce the chiseling work at the casting hopper opening, ensuring the casting quality of the top of the structural column and reducing concrete waste.

The invention discloses a sample preparation mold and a sample preparation method for testing the heat conductivity coefficient of a variable-size material. The sample preparation mold is characterized in that the sample preparation mold comprises a bottom plate, a combined female mold pressing plate, a thickness positioning plate suite and a male mold pressing plate, the bottom plate and the combined female mold pressing plate arranged above the bottom plate define cubic mold cavities of different sizes, and the thickness positioning plate suite is provided with a plurality of positioning plates of different thicknesses; the male mold pressing plate is arranged in a mold cavity and used for adjusting the thickness of the mold cavity, the male mold pressing plate is matched above the combined female mold pressing plate provided with a positioning plate with the corresponding thickness, the lower surface of the male mold pressing plate is flush with the upper end of the combined female mold pressing plate, and a plurality of flow guide grooves are formed in the upper edge of the combined female mold pressing plate. According to the invention, efficient and standardized sample preparation can be carried out on a thermal protection layer or a heat insulation layer of a solid engine, the surface flatness of a sample piece is good, the thickness is uniform, the sample piece cannot be adhered to a mold, and a basis is provided for the accuracy of a heat conductivity coefficient test.