183 results about "Rapid prototyping" patented technology

The invention discloses a rapid forming method for preparing a multi-layer thick and high-precision complex part, and belongs to the technical field of additive manufacturing, the method comprises the following steps: S1, part self-adaptive partitioning treatment: firstly partitioning the whole target part according to an internal entity and an outer surface, then adaptively dividing a partition into sub-partitions, and adaptively designing the width of the outer surface; s2, multi-layer thickness collaborative slice printing is conducted, specifically, the optimal forming layer thickness is set according to the partition characteristic difference, layer thickness collaborative slice design is achieved, and meanwhile the incidence relation between the layer thickness and the outer surface width is established; and S3, layered alternate scanning printing is conducted, specifically, highly-differentiated laser process parameters and scanning strategies are adopted for slices of different partitions. By means of the method, the metal part with the complex geometrical characteristics and the variable-thickness structure can be efficiently and precisely manufactured, and the quality and efficiency of the SLM technology in the complex metal part manufacturing process are remarkably improved.

The invention discloses a ROS2-based surface exposure rapid prototyping method, device and system and a medium, and relates to the technical field of additive manufacturing. The method comprises the steps that all hardware nodes are reset and initialized, a forming platform is flush with a powder laying plane, powder is supplemented, and a scraper is reset. And importing the three-dimensional model of the part to be formed into ROS2-based slicing software, generating a support structure after attitude optimization, slicing according to a preset layer thickness to obtain a slice layer, and performing rasterization processing to generate a black and white mask image. And circulating subsequent steps for each slice layer until all slice layers are completed: descending a servo motor of a forming bin according to a preset layer thickness, providing powder by a powder supply bin, and then spreading and slicking the powder. And sending the black and white mask image corresponding to the current slice layer to the DLP to execute projection. The SLM laser node performs selective laser melting according to the projected area. And a molten pool image is captured in real time and analyzed, an analysis result is input to an ROS2 decision node to dynamically adjust process parameters, and closed-loop control is achieved.

The invention discloses a rapid prototyping preparation method for a GeTe-based phase change light modulator. According to the invention, the GeTe material is used as the phase change layer and also used as the photoresist, and the patterning treatment of the phase change material layer is synchronously completed through the exposure and development treatment of the GeTe material, so that the technological process is simplified, and the traditional gluing and stripping steps are not needed; the steps of gluing, baking and the like of the photoresist layer are reduced, the damage of temperature accumulation of the whole device to the phase change layer is reduced, the precision of the whole structure is improved, and the polarization sensitivity is improved. Meanwhile, the preparation process is optimized by taking the GeTe material as the phase change layer and the photoetching layer, and high-precision pattern transfer with the minimum cd of 200nm is realized.

The invention discloses a shape follow-up flow channel and film covering integrated forming mold, and relates to the technical field of molds, the shape follow-up flow channel and film covering integrated forming mold comprises a lower mold, a mold body is composed of the lower mold, a middle frame and an upper mold, and steam, normal-temperature water and ice water circulate through an upper mold flow channel and a lower mold flow channel to obtain a rapidly-formed shoe sole finished product. The automation degree, the forming speed and the product consistency of sole forming are improved; an upper mold runner and a lower mold runner are arranged, through the synergistic effect of dynamically switching energy sources through two sets of first electromagnetic valves, longitudinally and uniformly conducting heat through a heat diffusion insert and transversely blocking heat transfer through a thermal barrier layer, finally, a local temperature gradient capable of being accurately programmed in time and space is constructed in the mold, and high-quality forming of a product is achieved.

The invention discloses rapid forming and demolding equipment capable of adapting to crucibles of different sizes, and relates to the technical field of crucible production, the rapid forming and demolding equipment comprises a fixed base, a stamping die is rotatably mounted on the fixed base, and a fixed support is fixedly mounted on the fixed base; and the stamping structure comprises a driver fixedly installed on the fixed support, the output end of the driver is fixedly connected with a driving rod, the driving rod is in threaded connection with a mounting plate, the mounting plate is fixedly connected with a threaded rod, and the threaded rod is in threaded sleeve connection with a stamping rod. In the process that the stamping rod is used for stamping, the stamping rod is made to rotate, the stamping efficiency is improved through rotation of the stamping rod, contact between materials and the stamping rod is more sufficient through rotation, stress is more uniform, the situation that the quality of the crucible is reduced due to cracks generated in the stamping process of the crucible is avoided, and the quality of the crucible is improved while the stamping rod rotates. And the stamping die can rotate reversely, so that the stamping effect is further improved.

The application discloses a kind of conformal runner film integrated forming mould, it is related to mould technical field, including lower mould, mould body is by lower mould, middle frame, upper mould three components are composed, steam, normal temperature water, ice water pass through upper mould runner, lower mould runner circulation and obtain the rapid forming of sole finished product, improve the automation degree of sole forming, forming speed and product consistency;Upper mould runner and lower mould runner are set, through the synergistic effect of two groups of first electromagnetic valve dynamic switching energy source, heat diffusion insert longitudinal uniform heat conduction, heat barrier layer transverse heat transfer resistance, finally in mould internal construction is in time and space can be accurately programmed local temperature gradient, realize the high quality forming of product.

This utility model relates to the field of sprocket technology and discloses a lightweight bicycle sprocket that can be rapidly formed. The sprocket body includes a sprocket body with a central hole, five sets of crank holes, and five sets of lightweight holes. Five connecting blocks are provided on the sprocket body, with the crank holes located in the connecting block area. A toothed ring is provided on the outer side of the sprocket body, and multiple sets of teeth are connected to the outer side of the toothed ring. An arc-shaped area is provided at the connection between the sprocket body and the toothed ring. Reinforcing members are provided inside the lightweight holes. This novel solution adopts integrated production, achieving production completion through multiple stamping processes, thus improving the production speed and efficiency of the device. The lightweight holes reduce the weight of the sprocket body, and the triangular shape of the reinforcing members improves their reinforcement effect.

The invention relates to the field of aviation electrical engineering and real-time simulation testing, and provides a multi-level collaborative verification method and platform for an aircraft power generation system control strategy and a storage medium, and the method comprises the steps: an offline simulation stage: carrying out the preliminary design and verification of the control strategy; in the real-time simulation stage, closed-loop real-time verification and parameter optimization are carried out on the control strategy; in the rapid prototyping stage, optimized control strategy codes are deployed to a rapid prototyping controller and are connected with real or high-precision simulated power generation system hardware, and hardware-in-loop-entity hybrid verification is carried out; wherein a unified performance reference and error feedback chain penetrating three stages of off-line simulation, real-time simulation and rapid prototyping is established, a verification result of each stage is used as an expected reference of the next stage, and error monitoring and backtracking correction are carried out. According to the method, through offline-real-time-prototype three-layer progressive verification and a model precision progressive calibration mechanism, the confidence coefficient and the one-time success rate of final physical verification are greatly improved.

This utility model discloses a rapid prototyping device for PET sheets, including a base, a mounting frame, a mounting plate, an extrusion roller A, a cooling head, and an adjustment structure. The mounting frame is mounted on the base, a fixing plate is mounted on the mounting frame, and another mounting plate is mounted on the fixing plate. An extrusion roller A is rotatably mounted between the mounting plates. A cooling chamber is formed in the extrusion roller A. A cooling head is mounted on the mounting plate, and one end of the cooling head is rotatably connected to the extrusion roller A. The cooling head is equipped with a water inlet and a water outlet. The water inlet is connected to a cold water pipe in the cooling head, and the water outlet is connected to a return water pipe in the cooling head. A coolant generator is externally connected to the water inlet and outlet. This utility model can rapidly cool the molten material, enabling rapid prototyping of PET sheets while maintaining shape stability. It improves the cooling effect and plasticizing efficiency, thereby enhancing the molding quality and performance of the PET sheets.

The utility model discloses a kind of quick forming self-adhesive labeling machine, it relates to self-adhesive labeling machine technical field, to solve the existing self-adhesive labeling machine on the surface of adaptive object different flatness There is a problem of deficiency, label and the adhesion density of object need to be further improved, its technical scheme main points include pedestal, the outer surface of one side of the pedestal is fixedly connected with mounting plate, the upper surface of the mounting plate is fixedly installed with multiple mounting blocks, the upper surface of each mounting block is fixedly connected with two limit sliding rods, the outer portion of the limit sliding rod is slidably sleeved with sliding block, the end surface of the sliding block is fixedly connected with fixed shaft, the fixed shaft is rotatably sleeved with compression roller. Reach the surface of adaptive object different flatness, label and the adhesion density of object is high, can detect the label that sticks simultaneously, and unqualified product is rejected, and the effect of strong practicability.

The application relates to the technical field of injection molding and discloses a rapid-forming automobile key precision injection mold and a processing method, which comprise a movable mold and a fixed mold, the upper portion of the movable mold is provided with a stirring device, the stirring device stirs and injects raw materials, and the raw materials are injected into the movable mold; the upper portion of the stirring device is provided with a top plate, a pushing motor is installed at the center position of the top plate, and the pushing motor is used for pushing the stirring device and the movable mold to move up and down; the bottom portion of the fixed mold is provided with a cooling tank, the fixed mold is placed on the cooling tank, and cooling liquid is injected into the cooling tank; the fixed mold is composed of two lower molds, two positioning plates and a supporting plate, the bottom portion of the supporting plate is fixedly installed with a stand column, the stand column is fixedly installed in the cooling tank and is used for supporting the supporting plate, the middle portion of the lower mold is designed as a convex block, the two convex blocks and the supporting plate form a convex structure, the bottom portion of the movable mold is designed as a concave structure, the convex structure and the concave structure form a mold cavity, and the mold cavity is used for automobile key precision injection molding.

The utility model discloses an electric pole framework wire winding rapid forming device, and relates to the field of electric pole framework iron wire winding, the electric pole framework wire winding rapid forming device comprises a wire winding forming rotating roller, a wire winding rotating shaft is arranged on the wire winding forming rotating roller in a penetrating mode, and one end of the wire winding rotating shaft is rotatably connected to a supporting stand column through a bearing; the bottom end of the supporting stand column is installed and connected to the wire winding machine frame. The other end of the wire winding rotating shaft rotatably penetrates through the mounting stand column through a bearing and is connected with the output end of the servo motor through a shaft connector, a shell of the servo motor is connected with the mounting stand column through a bolt, and the bottom end of the mounting stand column is mounted and connected to the wire winding rack; a limiting structure used for limiting a steel wire needing to be wound is arranged on one side of the wire winding forming rotating roller. By means of the forming device, a factory large disc of round steel bars or steel wires can be wound into small discs of steel bars or steel wires which are convenient to move and small in occupied space; the forming device is simple in structure, convenient to operate, assemble and disassemble and low in manufacturing cost.

The utility model discloses a rapid forming mold device for fireproof plugging of power transformation installation engineering, and relates to the technical field of work. The rapid forming mold device for power transformation installation project fireproof blocking comprises a first mold and a first T-shaped block, reinforcing assemblies are arranged on the first mold and the first T-shaped block, each reinforcing assembly comprises two H-shaped reinforcing ribs and four L-shaped reinforcing ribs, and two second T-shaped block grooves are formed in the inner walls of the two sides of the first mold and the inner walls of the two sides of the first T-shaped block; the mold device is fixed to the fireproof plugging part of the power transformation installation project through the installation base at the lower end through the reinforcing assembly, then the mold is filled with fireproof plugging materials, and in the filling process, under the action of the reinforcing assembly, the mold can bear the pressure of the fireproof plugging materials and keep the shape stable; and it is ensured that the fireproof plugging material is formed according to the shape of the mold, and therefore the situation that the mold deforms due to the fact that large side pressure is generated on the inner wall of the mold during filling of the fireproof material is avoided, and the practicability of equipment is effectively improved.

The utility model discloses a rapid prototyping precision die, which belongs to the field of precision dies, and comprises an upper die holder and a lower die holder, the top surface of the upper die holder is fixedly connected with a male die, the top surface of the lower die holder is fixedly connected with a female die, the right side of the female die is provided with a cooling mechanism, and the cooling mechanism comprises radiating fins, a cooling water tank, a pump body and a snake-shaped refrigeration pipe. The outer wall of the male die and the outer wall of the female die are both fixedly connected with cooling fins, the interior of the cooling water tank is fixedly connected with a snakelike refrigeration pipe, the top face of the cooling water tank is fixedly connected with a pump body, and a liquid pumping pipe is connected between the input end of the pump body and a second liquid outlet pipe on the right side of the cooling water tank. According to the precise mold, the cooling liquid does not need to be frequently checked and added, the precise mold can have the function of rapidly forming parts by adopting a refrigeration cycle cooling mode, the working intensity of workers is relieved, and the working efficiency is improved.

1. Name of the product in this design: Arc forming machine (WJ-3100). 2. Application of this design: It is mainly used for splicing boards in the home decoration process to achieve rapid forming of inner and outer arcs of different radii on the boards. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: a 3D model.

The invention discloses a femtosecond laser manufacturing system and method capable of dynamically regulating and controlling a numerical aperture, and belongs to the technical field of femtosecond laser precision machining. The system comprises a femtosecond laser, a power adjusting unit, a beam expander, an aperture tunable diaphragm, a 4F imaging system, a scanning galvanometer and an objective lens which are sequentially arranged along a light path, by adjusting the clear aperture of the diaphragm, the beam diameter at the entrance pupil of the objective lens is changed in real time, so that the equivalent numerical aperture of the system is dynamically regulated and controlled. In the machining process, according to the feature size precision requirements of different areas in a three-dimensional model, the three-dimensional model is divided into high-precision machining areas, medium-precision machining areas and low-precision machining areas, different equivalent numerical aperture modes and laser parameters are matched, the diaphragm is adjusted in a linkage mode in the scanning process, and switching between the high-resolution finish machining mode and the long-focal-depth efficient machining mode is achieved. The contradiction between the machining efficiency and the resolution ratio is solved, the precision is ensured, meanwhile, the overall machining efficiency is improved by several times to dozens of times, and three-dimensional cross-scale rapid forming is achieved.

The invention relates to the technical field of revolved body machining mold design and molds, and discloses a mold design method and mold for rapid forming of a small composite revolved body, and the design method comprises the steps that structural parameters of the mold are defined, and the structural parameters comprise fixed parameters and variable parameters; modeling is carried out based on the structured parameters, and mechanical and thermal collaborative finite element analysis is carried out; and by taking the variable parameters as optimization variables and combining with data obtained by finite element analysis, determining optimal variable parameters of the mold for rapidly forming the small composite material rotary body. The mold is of a coaxially nested tile valve type structure and sequentially comprises a central core column, an inner valve and an outer valve from inside to outside. According to the method, miniaturization and light weight of the mold are achieved, the mechanical transmission performance and the thermal response efficiency are both considered, the optimal mold parameter combination can be quickly found through an efficient parameter optimization strategy, and the forming efficiency and the product quality are improved.

This invention discloses a template-free, multi-layered, blocked vacuum-guided self-forming method for composite curved surface sheets, comprising the following steps: S1: Fabricating a vacuum bag component, connecting one end of the vacuum bag component to a resin container, and connecting the other end of the vacuum bag component to a vacuum device; S2: Bending the vacuum bag component into the desired shape; S3: Opening the vacuum device and closing the resin container, evacuating the vacuum bag to allow the deformed vacuum bag component to solidify and form a self-supporting first shell structure; S4: Opening the resin container to allow the resin to completely impregnate the layers, obtaining a second shell structure; S5: Completely curing the second shell structure to obtain a third shell structure; S6: Removing the vacuum bag from the third shell structure and polishing it to finally obtain the desired composite curved surface sheet. This invention eliminates the need for templates or increases the utilization rate of templates, enabling rapid prototyping, repeated prototyping, high component freedom, lightweight yet high-strength components, and simple control.

The invention relates to the technical field of aviation electrical system design and verification, and provides an aircraft power distribution system controller rapid prototype design method and system based on multi-level hardware-in-loop verification, and the method comprises the steps: S1, an architectural offline simulation stage: carrying out the preliminary function verification and parameter setting of a control logic through a unified simulation model; s2, in a distributed real-time simulation and code generation stage, real-time closed-loop verification and iterative optimization are carried out on control logic; and S3, a hardware replacement type rapid prototype verification stage: performing performance verification and final setting on the control strategy under a highly approximate real working condition. The method provided by the invention not only can greatly reduce the safety risk in the physical test, but also has the remarkable advantages of short development period, low verification cost and support of multi-level integrated verification, thereby providing reliable experimental data support for the subsequent physical verification of the aircraft power distribution system control strategy.

The utility model relates to the technical field of radiator water chamber molds, and discloses a rapid forming radiator water chamber mold which is characterized in that two sides of a base are fixedly connected with supporting columns, the upper ends of the supporting columns are fixedly connected with a supporting plate, and the upper end of the supporting plate is fixedly connected with an air cylinder; the output end of the air cylinder is fixedly connected with an upper mold block, anti-deviation mechanisms are arranged on the two sides of the upper mold block, a movable groove is formed in the inner side of the supporting column, and an auxiliary mechanism is arranged at the bottom end of the movable groove. And the production speed is reduced, and the production cost is increased due to the fact that the mold cannot be effectively attached, gas and impurities enter the mold, an exhaust hole of the mold is easily blocked by the impurities, the temperature in the mold is reduced slowly, and the solidification time of a casting is prolonged.

1. The name of the design product: column type rapid prototyping 3D printer. 2. The use of the design product: for the manufacture of complex geometry. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view.

Motor control rapid prototyping platform and operation method thereof, relate to motor control technology field. The present application is to solve the problem that the existing method cannot simulate the influence of real hardware circuit. The host computer establishes a motor control model and a controlled motor simulation model, the controlled motor simulation model preliminarily verifies and modifies the motor control model and loads the code program into the target machine, the host computer also modifies the motor control model according to the secondary verification result and loads the code program into the target frequency converter to upgrade the embedded control program. The target machine runs the program modified preliminarily according to the motor running state data. The target frequency converter collects the motor running state data and sends it to the target machine, controls the controlled motor by using the control signal to realize the secondary verification, and inputs the motor running state data into the upgraded control program to obtain the actual motor control signal to control the controlled motor.

The invention relates to a method and a device for rapidly forming a near-infrared targeted hardened water glass binder blast sand mould driven by a solar cell. The three translation mechanisms are used for driving the sand leaking mechanism, the water glass spraying mechanism and the near-infrared resistance wire heating mechanism to conduct sand laying, water glass binder spraying and near-infrared heating respectively, rapid molding and hardening of sand are achieved, and the working efficiency is improved. A near-infrared optical conversion agent is added into a water glass binder, the near-infrared optical conversion agent absorbs near-infrared light, molecules or electrons in a material are excited to enter a high-energy state, and then redundant energy is released as heat in the process of returning to a ground state; the near-infrared targeted heating of the water glass binder containing the near-infrared optical conversion agent is realized, and the hardening speed of the water glass binder is further improved.

The invention relates to a vehicle model (2), particularly in an early development phase, for aerodynamic analysis in a test rig, with a modeled air inlet (4), with at least one modeled engine compartment replica (6) through which ambient air admitted via the air inlet (4) can flow and in which at least one modeled vehicle component (8), such as an engine, is arranged, with at least one modeled windshield (10) and with at least one water box unit (12) arranged between the modeled engine compartment replica (6) and the modeled windshield (10), which comprises at least one rapid prototyping component of the vehicle model (2) and / or at least one non-model, series-produced component of a vehicle that differs from the vehicle model (2).

The utility model discloses a tablet personal computer shell producing, processing and rapid forming device which comprises a processing workbench, a bottom plate is installed at the upper end of the processing workbench, a mold table is fixedly connected to the upper end of the bottom plate, positioning assemblies are arranged on the two sides of the mold table, and each positioning assembly comprises a telescopic hydraulic cylinder. One end of the telescopic hydraulic cylinder is fixedly connected to one end of the supporting plate, the lower end of the supporting plate is arranged at the upper end of the machining workbench, a telescopic guide column is arranged at one end of the telescopic hydraulic cylinder, and one end of the telescopic guide column is rotationally connected to the mounting block. A tablet computer shell workpiece is stably positioned and clamped, deviation caused by vibration can be effectively avoided, the size deviation and the rejection rate are reduced, and it can be guaranteed that the appearance of a formed tablet computer shell is flat and smooth, and the shapes of the edges, corners and other parts are more regular.

The utility model relates to the field of molds, and discloses a rapid forming mold for parts with complex shapes, which comprises a base, a sliding block, a sliding chute, a first half mold, a second half mold, a demolding assembly and a sealing assembly, the first half mold is fixedly connected to the top of the base, the sliding groove is formed in the side, away from the first half mold, of the top of the base, the sliding block is fixedly connected to the bottom of the second half mold, and the sliding block is movably connected with the sliding groove; the demolding assembly is arranged on the front face of the first half mold, and the sealing assembly is arranged on the side, away from the first half mold, of the exterior of the second half mold. According to the utility model, quick demoulding is carried out through the demoulding assembly arranged outside the mould, a demoulding element does not need to be preset in the mould, the shape of the inner wall of the mould can be kept, the size or shape error of a part is avoided, and the mould is convenient to use; and injection molding material leakage caused by mold gaps is avoided.

The utility model discloses an injection mold capable of quickly forming, relates to the technical field of injection mold structures, and aims to solve the problem that the working efficiency of the injection mold is not high because the forming speed is low after an object is subjected to injection molding when the conventional injection mold is used for carrying out injection molding processing. A mounting base is arranged at the upper end of the injection mold, a forming mold base is mounted below the injection mold, fixing grooves are formed in the four corners of the forming mold base correspondingly, a cooling supporting base is mounted below the forming mold base, a water inlet base is arranged at one end of the forming mold base, and a backflow base is arranged on one side of the water inlet base. A mounting chamber is arranged in the forming die base, a cooling pipeline is mounted in the mounting chamber, a heat dissipation block is arranged at the lower end of the forming die base, a cooling chamber is arranged in the cooling supporting base, a cold air inlet base is arranged at one end of the cooling supporting base, and a cold air exhaust base is arranged at the other end of the cooling supporting base.

The utility model discloses a rapid prototyping hardcover box which comprises a box body, a drawer is arranged in the box body, a containing groove is formed in the upper surface of the box body, two notches are formed in the containing groove, two connecting blocks are installed on the upper surface of the drawer, and the top end of each connecting block penetrates through the corresponding notch and then is provided with a movable base. Through cooperative use of the sliding plate, the sliding groove and the drawer, a user can easily open the packaging box by pulling the drawer without using two hands, operation is more convenient, the packaging box has a dynamic display function due to the overturning design of the cover plate, different angles of articles can be displayed, and the packaging box is more convenient to use. And the storage grids with different front and rear side edge distances are formed in the drawer, so that the storage grids can be completely exposed only when the drawer is pulled out when the short edge faces forwards, a user can conveniently take out the articles, the functions of convenient opening and dynamic display are achieved, and the convenience and safety of article taking are also achieved.

This invention relates to a method for preparing ultra-high temperature ceramic materials using low-temperature, pressureless, and rapid prototyping, belonging to the field of ultra-high temperature ceramic technology. The method involves dispersing polyzirconium dihydrogen phosphate powder in a mixed solvent of ethanol and water, adding an equal mass of F44 phenolic epoxy resin, and concentrating the solution to obtain an adhesive. Subsequently, hafnium carbide powder of different particle sizes is compounded into the adhesive, and boron powder and silicon powder may be selectively added. After uniform mixing, the solvent is removed, the mixture is ground and shaped, and then cured pressureless in air to obtain the ultra-high temperature ceramic material. This invention uses polyzirconium dihydrogen phosphate as a novel curing agent, solving the problems of high porosity and poor heat and ablation resistance in traditional epoxy systems, while retaining its high adhesive strength. The proposed process is low-temperature, pressureless, simple to operate, and rapid in molding, yielding ultra-high temperature ceramic materials with high heat and ablation resistance, suitable for thermal protection in extreme thermal environments such as aerospace.

The utility model relates to the technical field of bicycle accessory production and processing, and discloses a bicycle seat post die-casting die convenient to cool, which comprises a lower die and an upper die, and the upper die is arranged at the top end of the lower die. When the bicycle seat pipe die-casting die convenient to cool is used, a first air blower and a second air blower can be controlled to start to blow air into an air guide cover, cold air can be guided out backwards to different positions on the left and right through air outlet holes, a heat conduction plate is arranged on the outer side of a cavity, internal heat can be guided out in an auxiliary heat absorption mode, and the cooling effect is improved. And cold air fed by an air blower I and an air blower II can be used for quickly dissipating heat on a plurality of groups of fins I and fins II, quickly cooling the interior of the mold and assisting in quick forming and demolding of the seat pipe fitting. The problem that rapid auxiliary cooling of the interior of a mold is inconvenient is solved.