1565results about "Capacitor manufacture" patented technology

The vacuum heat treatment clamp applies a certain pressure to the capacitor core, the core is in an inert gas and negative pressure environment for staged heating, finally, a heat conduction box body is slowly deflated, and after the air pressure in the heat conduction box body is balanced with the atmospheric pressure, the heat conduction box body is opened, so that the capacitor core is subjected to vacuum heat treatment. And taking out the capacitor core. According to the process, the capacitor core is located in the negative pressure inert gas environment, the product is isolated from air and is not oxidized, gas in the product can be easily exhausted through the negative pressure environment, and an internal air gap is eliminated; the capacitor core is located in the middle of the heat treatment clamp, different portions of the capacitor core are evenly heated, product shrinkage is even and consistent, and the voltage resistance and the charging and discharging capacity of a capacitor are obviously improved.

The invention belongs to the technical field of electrode foil formation treatment, and particularly relates to an electrode foil and a preparation method thereof and an aluminum electrolytic capacitor, the preparation method of the electrode foil comprises the steps of performing multi-stage formation treatment on a corrosion foil, the number of stages of the formation treatment is at least two, and the formation treatment at least comprises first-stage formation and second-stage formation, first heat treatment is carried out after the second-stage formation; a formation liquid used in the second-stage formation is a mixed solution containing adipate and monopotassium phosphate. According to the preparation method provided by the invention, the formation liquid used in secondary formation is the mixed solution containing adipate and monopotassium phosphate, the limitation of traditional single formation liquid is broken through, and synchronous optimization of the structure, hydration resistance and electrochemical performance of the aluminum oxide film is realized through multi-stage formation, mixed solution synergy and the synergistic effect of formation and heat treatment; meanwhile, production cost is reduced, and environmental load is relieved.

The invention relates to the technical field of power electronic components, and discloses a high-temperature-resistant electrolytic capacitor which comprises the following components in parts by weight: 80-90 parts of a graphene or carbon nanotube coating used for preparing an electrolytic capacitor shell; the invention further provides a preparation method of the high-temperature-resistant electrolytic capacitor, and the preparation method comprises the following steps: heat conduction optimization design: simulating a temperature field of the electrolytic capacitor through an unsteady-state heat conduction equation, optimizing a heat dissipation path of the electrolytic capacitor, and improving the heat dissipation performance of the electrolytic capacitor; and heat can be uniformly conducted to an external heat dissipation device. By introducing the microencapsulated phase change material, the graphene coating and the accurate temperature sensor array and optimizing heat dissipation design, efficient heat dissipation, temperature balance and long-term stability of the electrolytic capacitor in a high-temperature environment are achieved, the working performance of the electrolytic capacitor is remarkably improved, and the service life of the electrolytic capacitor is remarkably prolonged.

The embodiment of the invention provides a ceramic diaphragm automatic positioning system based on high-precision visual feedback and closed-loop control, and the system comprises a parameter reference setting module which is used for setting a theoretical reference point and a visual detection parameter; the real-time visual detection module is used for collecting an image of the to-be-stacked film and outputting an image coordinate of the mark point; the core operation module is used for converting the image coordinates of the mark points into actual coordinates based on the visual detection parameters, reading a theoretical reference point of the current to-be-stacked diaphragm and calculating a position error vector between the actual coordinates and the theoretical reference point, and the position error vector comprises a translation compensation amount and a rotation compensation amount; and the motion control and closed loop feedback module is used for receiving the position error vector and generating a control instruction to drive the workbench to move. According to the system, through parameterized reference setting, real-time visual detection, intelligent error calculation and real-time motion compensation, the technical limitation is effectively overcome, and the lamination alignment precision and efficiency are remarkably improved.

A casing material for a power storage device, including a laminate that includes, in order, at least a base material layer, a barrier layer, and a heat-fusible resin layer. The heat-fusible resin layer includes a single layer or a plurality of layers. The heat-fusible resin layer includes at least one layer having a hardness of at least 70 MPa from a cross-section in the lamination direction of the laminate, measured using a nanoindentation method using an indentation load of 100 μN.

The invention provides a capacitor core rod plug dismounting device, and belongs to the technical field of capacitor preparation, and the device comprises a strip-shaped frame which is vertical and is provided with two open ends, and the front and rear inner side surfaces are provided with guide grooves; the clamping assembly comprises two movable rods arranged on the two sides of the strip-shaped frame respectively, the axes of the two movable rods are coaxial and are perpendicular to the side face of the strip-shaped frame, and the opposite ends of the two movable rods are elastically arranged in a telescopic mode along the axes and are provided with clamping plates; the two movable rods are synchronously and oppositely arranged along the axis in a moving manner; the pair of bearing rods is horizontally arranged below the strip-shaped frame and perpendicular to the side face of the strip-shaped frame, and the two bearing rods are movably arranged in the width direction of the strip-shaped frame; the dismantling assembly comprises two pairs of top plates which are vertically arranged below the corresponding guide grooves respectively, and the top plates are movably arranged in the width direction of the strip-shaped frame and the axis direction of the movable rod; the two bearing rods respectively penetrate through the two pairs of top plates; and the transmission assembly is arranged between the movable rod and the bearing rod. The dismounting device can achieve the purpose of automatically pulling out the plug, and the production efficiency of the thin film capacitor is improved.

The invention relates to the technical field of capacitor preparation, in particular to a preparation process optimization method and system applied to a high-frequency special capacitor, and the method comprises the steps: confirming a preparation environment, receiving a preparation instruction based on the preparation environment, and if the quality of a modified polypropylene film is not within a preset quality interval, determining that the modified polypropylene film is not in the preset quality interval; if yes, returning to the step of obtaining the modified polypropylene film according to the preparation instruction, and if the mass of the modified polypropylene film is within a preset mass interval, metallizing the modified polypropylene film by utilizing distillation equipment to obtain a metallized modified film; and completing the preparation process optimization method applied to the high-frequency special capacitor based on the sealed capacitor, the maximum power density report and the conductivity report. According to the invention, key parameters in the preparation process can be acquired and dynamically adjusted in real time, so that the accuracy of capacitor performance evaluation is improved.

The invention relates to the technical field of thermal degumming stripping, and discloses a novel thermal degumming stripping device for an MLCC component. Comprising a storage box, supporting frames are fixedly connected to the two sides of the storage box, hoppers are fixedly connected to the side surfaces of the supporting frames, a transverse plate is fixedly connected to the upper surfaces of the supporting frames, a connecting plate is fixedly connected to the side surface of the transverse plate, a heating column is arranged on the lower surface of the connecting plate, and a block is connected to the side surface of the heating column in a sleeving mode. A first connecting fixing plate is arranged on the rear surface of the block, and a sliding block is slidably connected to the side surface of the first connecting fixing plate. After the block is rolled into a cylinder, the face, attached with hot degumming glue, of the block is attached to the heating column, meanwhile, the surface of the block is slightly pressed by hands, the hot degumming glue is attached to the heating column to be heated, and the degumming glue is heated to expand; the MLCC component product is stripped from the adhesive film, the product falls off under the action of gravity, and the product is recycled in the storage box through the inverted conical hopper, so that the stripping efficiency of the MLCC component is improved.

The utility model discloses a welding jig for a pulse molded capacitor. The pulse molded capacitor comprises a plurality of capacitor bodies arranged at intervals, two connecting frames oppositely arranged on the two sides of the plurality of capacitor bodies and a plurality of molded shells wrapping the peripheries of the plurality of capacitor bodies respectively. The welding jig comprises an upper welding plate, a lower welding plate, a lower mounting cavity and an upper mounting cavity, wherein the upper welding plate and the lower welding plate are oppositely arranged up and down; the lower mounting cavity is formed in the lower welding plate and is used for mounting a capacitor body; the two mounting grooves are respectively formed in the top surface of the lower welding plate and are used for mounting the two connecting frames; the two positioning mechanisms are oppositely arranged on two sides of the capacitor body and are respectively used for fixing the two connecting frames; the structure of the welding jig is specifically limited, the positioning mechanism is arranged to position and fix the connecting frame so as to ensure that the multiple capacitor bodies and the connecting frame can be welded and formed at a time, and the welding quality is stable.

The invention provides a toppling detection assembly for a capacitor assembling machine. The toppling detection assembly comprises a pushing structure, a first clamping structure, a second clamping structure and a photoelectric sensor. The photoelectric sensor is connected with a control system of the capacitor assembling machine; the pushing structure comprises an L-shaped push rod, a first guide block, a first rotary driving motor, a first guide rod and a mounting seat; the first clamping structure comprises a first L-shaped clamping arm, a first clamping arm, a first pressing rod, a first push-pull driving motor and a first reset spring; the second clamping structure comprises a second L-shaped clamping arm, a second clamping arm, a second reset spring, a second push-pull driving motor and a second pressing rod. The upper surface of the first L-shaped clamping arm and the upper surface of the second L-shaped clamping arm are located on the same horizontal plane. The length of the upper surface of the first L-shaped clamping arm is greater than that of the upper surface of the second L-shaped clamping arm; the inclined capacitor can be found in time, the inclined capacitor can be prevented from being clamped and transferred by the clamp, and enough time is won for a worker to process the inclined capacitor.

[Problem] To provide a method and an apparatus for manufacturing an electrode for an energy storage device whereby a more compact electrode coating apparatus, an improvement in electrode production speed, and a reduction in running costs can be achieved. [Solution] Provided is a method for manufacturing an electrode for an energy storage device, the method comprising: a step A for applying a slurry to a rolled current collector conveyed in one direction at a prescribed speed; a step B for heating the applied slurry to a temperature not below 30°C and not above the boiling point of a dispersant in the slurry; and a step C for irradiating the slurry applied to the current collector with laser light of a wavelength equal to or greater than 435 nm and less than 550 nm, or of a wavelength equal to or greater than 890 nm and less than 1100 nm, from a laser irradiation unit, wherein the slurry contains 0.1% by mass or more of carbon relative to the solid content of the slurry.

The invention discloses a composite busbar type flexible direct current capacitor, and relates to the field of capacitors. A vibration reduction connecting piece is arranged between a busbar and a capacitor core, so that the impact resistance and vibration resistance of the capacitor core are improved, impact force can be dispersed to part of the core or a single core, the impact force is eliminated through the vibration reduction connecting piece, and the service life of the capacitor is prolonged. And the risk of displacement, fracture or capacitance loss of the core is reduced. A current-conducting plate is changed into the busbar arranged at the edge of the shell, and the capacitor cores are divided into a plurality of groups through the extended connecting plates, so that impact force is dispersed and eliminated. The arc-shaped groove is arranged at the joint of the connecting plate and the busbar, so that the breaking risk is reduced, and the reliability of the busbar and the connecting plate is improved. The first thrust elastic piece and the second thrust elastic piece are used for counteracting impact force, and then part of the force is transmitted to the supporting plate and is further counteracted through the external damping device, so that the impact resistance of the capacitor is enhanced. And the adjacent capacitor cores on the connecting plate are connected with other cores through the elastic ropes, so that the impact resistance of the capacitor is enhanced.

The invention discloses a film for preventing a capacitor core from being damaged and a method for aging by adopting the film, which can effectively isolate the core with large leakage current in time, do not need a specially-assigned person to find and remove the capacitor core with large leakage current, and improve the production efficiency by 50%. And the core is prevented from burning to influence the surrounding core as shown in the figure, so that the product percent of pass can be effectively improved by 12%. Compared with the prior art, the efficiency is improved by 50%, the product percent of pass is improved by 12%, and the method is simple, easy to operate and remarkable in effect.

The invention relates to an internal serial metallized film, a preparation method, a filter capacitor and a base film, the base film is made of a blending material of polyethylene glycol terephthalate and polyethylene naphthalate according to a mass ratio of 2: 3, and the thickness of the base film is 8-12 [mu] m; the multi-layer metallization layer is arranged on the base film and comprises a first metal layer, a buffer layer and a second metal layer, the buffer layer is located between the first metal layer and the second metal layer, the patterned structure forms a plurality of conductive units which are connected in series on the multi-layer metallization layer, each conductive unit is in a regular hexagon shape, and the first metal layer is arranged on the first metal layer. The side length of the conductive units is 3-6mm, and an isolation belt with the width of 0.3-0.8 mm is arranged between the adjacent conductive units. According to the invention, a plurality of key performance indexes such as high-frequency filtering performance, voltage endurance capability, oxidation resistance, structural stability, light transmission and the like are optimized and improved.

The invention relates to the related technical field of capacitor production, in particular to a preparation method of a capacitor shell, which comprises the steps of material selection and preparation, mold design and manufacture, shell forming process, quality detection and test, shell surface treatment and protection, shell assembly and welding, and final detection and quality guarantee of the shell. According to the preparation method of the capacitor shell, multiple key links are covered, various materials are selected, aluminum alloy, stainless steel, plastic and the like are matched with different scenes, the purity is strictly controlled and treated to enhance the performance, the mold design is reasonable, the material selection is proper, the machining precision is high, a cooling system optimizes the forming quality, and the forming process is rich; parameters are controlled to guarantee precision, quality is guaranteed through comprehensive detection, performance and attractiveness are improved through surface treatment, multiple modes are adopted for assembly, automation and manual work are combined, structural stability and good sealing are guaranteed, all links synergistically improve the comprehensive performance of the shell, and production quality and efficiency are guaranteed.

To align electronic components with a simple structure.SOLUTION: An attitude changing passage 22 of an electronic component transfer device 10 includes a circular portion 25, and a downstream passage 23 has a V-shape. The attitude changing passage side end of the downstream passage 23 has a V-shape 17A formed by a tangent to the circular portion 25, and this V-shape 17A rises toward the downstream side to become a V-shape 17B. Relief grooves 18 are provided at the lower ends of the V-shapes 17A and 17B.SELECTED DRAWING: Figure 2C

The utility model relates to the technical field of capacitors, and discloses a sealing device for capacitors, which comprises a base, the top of the base is fixedly provided with an annular baffle plate, the interior of the annular baffle plate is rotatably connected with a turntable, the edge of the top of the turntable is provided with accommodating grooves in a penetrating array, and the right side of the annular baffle plate is provided with a feeding assembly. A sealing assembly is arranged above the clamping assembly, and a discharging hopper is fixedly installed on the lower portion of the left side of the base. The rotating roller rotates to drive the upper half part of the conveying belt to move from right to left, so that the capacitor is conveyed from right to left; an external driving source drives the rotating disc to rotate, the capacitors penetrate through the feeding port to enter the containing grooves, the rotating disc is located on the side walls of the containing grooves to push the capacitors to move anticlockwise, and the follow-up capacitors sequentially enter the containing grooves of the array. After the capacitor is sealed, when the capacitor moves to the discharging port, the capacitor is transferred out through the discharging hopper, and therefore the purposes of automatic feeding and discharging and high machining efficiency are achieved.

The invention discloses a production method of a vehicle gauge grade MLCC release base film. The base film comprises an outer layer, a middle layer and an inner layer. The outer layer is prepared from PET, silane coupling agent modified nano zinc oxide, organic silicon modified acrylate and an antioxidant; the middle layer is prepared from PET (Polyethylene Terephthalate), ethylene propylene diene monomer, nano silicon dioxide, organic montmorillonite and PP-g-MAH (Maleic Anhydride); the inner layer is composed of PET, a high-density polyethylene / butadiene styrene rubber composite modifier, graphene oxide and multi-walled carbon nanotubes. The prepared vehicle gauge grade MLCC release base film has excellent mechanical properties and thermal stability.

The invention relates to a base metal high-voltage multilayer ceramic dielectric capacitor and a preparation method, the base metal high-voltage multilayer ceramic dielectric capacitor is formed by stacking and firing dielectric layers, and each dielectric layer comprises a dielectric layer and an electrode printed on the dielectric layer. The dielectric layer comprises the following raw materials: a BMYT main matrix, an NN material, magnesium oxide, manganous-manganic oxide, zirconium dioxide, calcium carbonate, strontium carbonate and rare earth oxide; through the raw material composition and the preparation method of the ceramic dielectric capacitor, the prepared ceramic dielectric capacitor has excellent performances of high dielectric constant, high voltage resistance, stable dielectric-temperature characteristic curve, low loss, high insulation resistance, long-term high-voltage reliability and the like under the condition of high dielectric thickness (30 microns before firing).

Provided is a multilayer ceramic capacitor and a method of manufacturing the same. The multilayer ceramic capacitor includes a capacitor body including a dielectric layer and an internal electrode layer, and an external electrode disposed outside the capacitor body. The dielectric layer includes barium titanate-based main ingredient including barium (Ba) and titanium (Ti), and gallium (Ga)Peak intensity ratio of Ba / Ga (IBa / IGa), obtained by TEM-EDS analysis of a region from an interface between the dielectric layer and the internal electrode layer to a depth surface of 10 nm to 500 nm into the dielectric layer, is 1.0 to 5.0.

The utility model provides a film capacitor glue pouring shaping and pin positioning work fixture, which is characterized by comprising a base, a filler strip and a tooth-shaped positioning clamping plate, the tooth-shaped positioning clamping plate, the filler strip and the base are sequentially arranged from top to bottom, the base is provided with a plurality of cavities, the sizes of the cavities are matched with the sizes of product shells, and the tooth-shaped positioning clamping plate and the filler strip are matched with each other. The product shell is loaded with a product and then is arranged in the base cavity; the appearance size of the tooth-shaped positioning clamping plate is consistent with that of the base, the middle of the tooth-shaped positioning clamping plate is an empty slot, a plurality of convex teeth are vertically symmetrical in the empty slot and are provided with cavities matched with sheet pins to insert, and the neutral lines of the convex teeth are consistent with the neutral line of the cavity of the base; the base cavity is through up and down, so that the product is easy to demould after the glue pouring material is cured; the hollowed-out parts of the tooth-shaped positioning clamping plate are more, so that the glue filling operation is easy to complete; a cavity of a base of the product shell is matched, so that deformation of the shell in the high-temperature drying process is prevented; the tooth-shaped positioning clamping plate fixes the sheet pins, so that the pin positioning problem of the capacitor is solved, and deviation of the pins in the transfer process after glue pouring is prevented.

The utility model discloses a capacitor chip assembling device which comprises the components of a conveying mechanism which is used for conveying a braid, the braid is provided with a plurality of pin wires along the length direction of the braid, each pin wire comprises two clamping parts which are oppositely arranged, and the two clamping parts are used for clamping a chip; the feeding mechanism comprises a vibration disc used for conveying chips and a material channel allowing the chips to pass through, the material channel receives the chips from the vibration disc, and the material channel extends in the conveying direction of the conveying mechanism; the distraction mechanism comprises a distraction piece and a first power assembly for driving the distraction piece to ascend and descend, the distraction piece can be inserted between the two clamping parts, and the distraction piece is used for enabling the two clamping parts to elastically deform so as to increase the distance between the two clamping parts; the assembling mechanism comprises a material receiving base, a push block horizontally arranged on the material receiving base in a sliding mode and a second power assembly driving the push block to slide, and the material receiving base is used for receiving the chips at the tail end of the material channel. According to the utility model, the problem that the chip is not assembled correctly can be reduced, so that the problem that the chip falls off is reduced.

The embodiment of the invention provides a capacitor and a preparation method thereof, a circuit board assembly and a preparation method thereof, and electronic equipment, relates to the technical field of electronics, and is used for reducing the influence of capacitor vibration on a circuit board. The capacitor comprises a capacitor body and a first electrode; two opposite ends of the capacitor body are respectively provided with a first electrode; the capacitor body comprises a plurality of dielectric layers and a plurality of second electrodes; the multiple dielectric layers are stacked; any surface of the capacitor body can be provided with a mark pattern. Therefore, when the capacitor is bonded with the circuit board, the second electrode can be ensured to be perpendicular to the circuit board by identifying the mark pattern, so that the howling problem is reduced or eliminated.

To highly accurately calculate a lamination deviation amount between two layers of a laminated sheet body.SOLUTION: The sheet body 2 has a first sheet body 3 and a second sheet body 4 which are alternately laminated. The first sheet body includes a first mark 3334 and first through-holes 30c, 30d. The second sheet body includes a second mark 4344 and second through-holes 440c, 40d. The first marker is formed such that the first direction D1 can be specified. The second mark is formed so that the second direction D2 can be specified. When the first sheet element is accurately stacked on the second sheet element, the second mark is located at a predetermined second ideal position with respect to the first mark. When the second sheet element is accurately stacked on the first sheet element, the first mark is located at a predetermined first ideal position with respect to the second mark. In the upward view, the positional relationship between the position of the first marker and the second ideal position with respect to the first direction coincides with the positional relationship between the position of the second marker and the first ideal position with respect to the second direction.SELECTED DRAWING: Figure 6

The invention relates to the technical field of capacitor manufacturing, and discloses a block lamination method of a multilayer ceramic capacitor, which comprises the following steps of: feeding protective films, cutting the protective films in a protective film conveying process, stacking a plurality of protective films on a protective film stripping table, and simultaneously adsorbing the plurality of protective films to a lamination carrying table; laminating a bottom protective film, feeding a dielectric film roll, and cutting in a dielectric film conveying process; the dielectric diaphragms are laminated, and the in-place identification mode of the dielectric diaphragms is optimized; laminating a top protective film; the invention also discloses a block lamination device of the multilayer ceramic capacitor, the protective film conveying mechanism is provided with a first vertical cutting assembly and a first transverse cutting assembly, and the dielectric film conveying mechanism is provided with a second vertical cutting assembly and a second transverse cutting assembly; according to the invention, the lamination efficiency of the block lamination is improved, so that the dielectric diaphragm only needs to be provided with a mark point and does not need to be provided with a stripping mark point, the width required by the dielectric diaphragm is reduced, and materials are saved and dangerous waste materials are reduced.

The invention discloses a high-voltage-resistant film for a wind power capacitor and a preparation method thereof, and belongs to the technical field of capacitor films, the high-voltage-resistant film comprises the following raw materials by weight: 50-80 parts of polypropylene resin, 3-5 parts of a modified filler, 0.2-0.5 part of an antioxidant, and 0.3-0.5 part of a nucleating agent; the preparation method comprises the following steps: uniformly mixing the raw materials, melting at 170-190 DEG C, filtering, exhausting for 10-12 times, carrying out hot press molding at 20 MPa, forming a thick sheet, stretching, and preparing the thin film to prepare the high-voltage-resistant thin film for the wind power capacitor, and when the modified filler is added into polypropylene, on one hand, the high-temperature resistance of the polypropylene material can be improved, and on the other hand, the voltage resistance of a matrix can be improved, so that the high-voltage-resistant thin film for the wind power capacitor is prepared. And moreover, the compatibility with the matrix polypropylene can be improved by grafting the polymer to the surface of the talcum powder.

The invention discloses a method for improving the voltage endurance capability of a chip tantalum capacitor, and belongs to the technical field of capacitor manufacturing, and the method comprises the steps: enabling an anode tantalum block formed through a powder metallurgy method to generate a dielectric oxide film in an acid solution, then placing the anode tantalum block in sputtering coating equipment, introducing oxygen, taking tantalum as a target material, and carrying out sputtering coating on the anode tantalum block; a layer of tantalum pentoxide film is generated on the surface; and finally, the chip tantalum capacitor is formed by coating a manganese dioxide or polymer cathode. The invention relates to a method for improving the voltage endurance capability of a chip-type tantalum capacitor, which plays a role in improving the reliability of the chip-type tantalum capacitor.

To provide a mixing system 1 for a power storage device that efficiently homogenizes multiple types of powder.SOLUTION: A mixing system 1 for a power storage device includes a measuring portion 10 that stores multiple types of powder P measured at a predetermined ratio, a supply portion 20 that is arranged below the measuring portion 10 and supplies the powder P to a kneading portion 30, and the kneading portion 30 that is connected to the supply portion 20 and kneads the powder P supplied from the supply portion 20. The measuring portion 10 includes a lower opening 10c that opens downward, a shutter 11 that is arranged at an opening edge 10d of the lower opening 10c, and a control portion 13 that opens and closes the lower opening 10c by sliding a shutter 11 in an opening / closing direction A. The opening speed, which is the speed at which the shutter 11 moves in the opening direction B, is set on the basis of the volume ratio of the powder P in each of multiple compartments obtained by dividing the powder P stored in the measuring portion 10 into multiple compartments in the opening / closing direction A.SELECTED DRAWING: Figure 1

The utility model discloses a round core clamping machine which comprises a machine frame, a clamp transferring channel, a clamp placing station, a round core placing station, a buffer rubber filling station, a pressing plate placing station, a nut locking station and a round core moving device. The clamp placing station, the round core placing station, the pressing plate placing station and the nut locking station are sequentially arranged along the clamp transferring channel, the buffer rubber filling station is located above the round core placing station, and the round core moving device is located on one side of the round core placing station. Through the arrangement of the round core moving device, the cores can be moved in the corresponding direction, so that the round cores are stacked in a staggered mode, the cores in the upper row can be conveniently stacked at the adjacent position of the two cores in the lower row, the vertical space during core stacking is saved, the number of the cores stacked each time is increased, and therefore the metal spraying efficiency is improved.