32 results about "Mold tests" patented technology

The invention relates to the technical field of ocean testing, in particular to a wave breaking physical model test method based on a target detection technology, which comprises the following steps: setting two coordinate origins and a plurality of irregular coordinate registration points in a test water tank, carrying out wave tests with different wave heights and periods, and recording wave propagation and breaking processes by using a high-definition camera. Training a deep learning model by using a marked water surface line, a white cap and a broken form, and automatically identifying wave features by using the trained model; a mapping model of image pixel coordinates and actual physical coordinates is established, the image is corrected through an interpolation method, and it is ensured that the wave feature position is accurately matched with the actual position. Segmenting a high-definition picture into sub-pictures, and identifying the characteristics of a water surface line, a spindrift surface and a fracture zone by using the training model; and processing the identification result, and extracting the space and time characteristics of the water surface line and the position and range of the fracture zone. According to the invention, positioning precision can be maintained, and observation interference can be reduced.

The present invention discloses an injection mold pressure testing device, which relates to the technical field of mold pressure detection. It includes a base, on the top of the base is fixedly installed a workbench, and on the top of the workbench is fixedly installed a fixing frame. And on the top of the fixing frame is fixedly installed a hydraulic push rod. At the same time, the movable end of the hydraulic push rod passes through the fixing frame and is fixedly installed with a movable plate. Moreover, on both sides of the top of the movable plate are symmetrically installed guide rods, and both guide rods are slidably connected to the fixing frame. It also includes: two groups of pressure sensors, fixedly installed at the bottom of the movable plate; so that when testing a larger mold, the contact area with the mold can be enlarged, avoiding uneven pressure caused by the contact area, avoiding affecting the accuracy of the injection mold test, and can be used for blow molding molds of different sizes, improving the applicability. And when performing pressure testing on a larger mold, excessive pressure can be avoided, preventing unnecessary damage and wear to the mold.

The invention relates to the technical field of cement mortar test mold automatic forming equipment, and discloses a cement mortar test mold automatic forming production line. Comprising a cement mortar test mold automatic forming equipment system, a cement mortar test mold automatic robot curing box equipment system, a cement mortar test mold automatic demolding and demolding equipment system, a cement mortar test mold automatic test mold cleaning equipment system and a cement mortar test mold automatic mold filling equipment system. The cement mortar test mold automatic molding equipment system is used for completing molding of a cement mortar test block in the assembled test mold to form a molded test mold; the cement mortar test mold automatic robot curing box equipment system is used for curing a forming test mold; the automatic forming production line for the cement mortar test mold solves the problems that an existing cement mortar test mold is low in efficiency, unstable in quality, large in labor intensity and large in test mold loss during manual operation from assembling, forming, mold stripping to cleaning.

The invention provides a microwave-assisted method for preparing high-performance concrete and application, and belongs to the technical field of concrete curing and foundation engineering construction. The high-performance concrete is prepared from, by weight, 10-40 parts of cement, 2-20 parts of basalt powder, 1-20 parts of silica fume, 1-5 parts of gypsum, 10-40 parts of quartz sand, 10-40 parts of calcined clay, 5-15 parts of limestone powder, 1-5 parts of fibers and 10-30 parts of water, the usage amount of the basalt powder, the usage amount of the silica fume, the usage amount of the gypsum and the usage amount of the fibers are not zero, and the high-performance concrete is prepared after the raw materials are mixed and formed. The obtained molded test piece is subjected to mold curing and microwave-assisted curing in sequence, and the high-performance concrete is obtained. According to the invention, the synergistic effect of various mineral components such as calcined clay, limestone powder and the like is adopted, and the synergistic improvement of the mechanical property and electromagnetic absorption property of the concrete is realized by optimizing the proportioning amount of the mixed raw material powder and combining a microwave-assisted curing technology.

The embodiment of the invention provides a water electrolysis hydrogen production cold mold test device and method, and belongs to the technical field of water electrolysis hydrogen production. The test device comprises a gas supply system, a closed water tank and a post-treatment system which are connected in sequence, and a gas recovery pipeline and a booster pump are arranged between the post-treatment system and the closed water tank; after entering the closed water tank, nitrogen and helium generated by the gas supply system are recycled into the closed water tank after passing through the post-processing system, the gas recycling pipeline and the booster pump. According to the scheme, the water electrolysis hydrogen production equipment can be debugged and optimized under the condition of no actual electrolytic reaction, the debugging efficiency is improved, and the debugging cost is reduced.

The present invention relates to the technical field of concrete test molds, and discloses an automatic oiling concrete test mold device, comprising a vibration table, a test mold, an oiling mechanism and an oil conveying mechanism, wherein two rows of test molds are neatly arranged on the surface of the vibration table, and each test mold is provided with three mold grooves, a support frame is provided at the upper end of the vibration table, and the oiling mechanism is slidably installed at the lower end of the top plate of the support frame. The automatic oiling concrete test mold device is provided with an automatic lifting and sliding brush head, and when the brush head probes into the mold groove, the same amount of oil is respectively injected into the oil filling groove and then seeps out from the oil outlet hole, and is adsorbed by the elastic oiling layer and smeared on the inner wall surfaces of two side-by-side mold grooves, and the oiling is convenient and fast. When the oiling mechanism is working, under the action of the first limit plate and the second protective edge, the second limit plate and the first protective edge, the four sides of different numbers of test molds are limited and fixed, and the practicability is high, and the movement of the test molds during the oiling process is effectively prevented.

The application provides an automatic assembly method, system, medium and product of an all-solid-state mold test battery, relating to the field of solid-state battery assembly, and the method comprises the following steps: controlling a pressurizing unit to apply pressure to an all-solid-state battery mold in an axial direction until a target pressure maintaining state is reached; driving a screw locking unit to screw a fastener into the all-solid-state battery mold in the process of maintaining the target pressure maintaining state, and monitoring an axial load response parameter of the pressurizing unit in real time; when the axial load response parameter is monitored to reach a preset load transfer threshold, the screwing action of the screw locking unit is stopped, and a pressure-locked mold assembly is obtained; and controlling the pressurizing unit to remove external pressure from the mold assembly according to a preset curve, and obtaining an all-solid-state battery mold finished product. By implementing the method, seamless takeover of internal pressure by the fastener before external pressure removal can be realized, and the authenticity and accuracy of the internal forming pressure of the all-solid-state battery mold are ensured.

The present application relates to a rapid verification method for mold development, which includes the following steps: S1, receiving the mold design plan sent by the mold development department in real time; S2, simulating the mold stamping operation through CAE software according to the mold design plan and generating simulation analysis results; S3, judging whether there is defect information in the simulation analysis results; S4, if there is, sending the mold design plan and simulation analysis results to the mold development department for plan correction; S5, if not, generating manufacturing requirements and sending them to the mold manufacturing department for functional module manufacturing; S6, assembling the mold according to the assembly requirements according to the mold design plan to obtain a trial mold; S7, installing the trial mold on the stamping equipment for trial mold processing, judging whether the mold design plan is qualified according to the trial mold processing results, and sending the trial mold processing results to the mold development department. The present application has the effect of reducing R&D costs and improving the efficiency of mold development verification.

The utility model discloses a mold test fixture and a mold test system, the mold test fixture is used for testing whether a vacuum hole of a mold is blocked, the mold test fixture comprises a test main body, the test main body is provided with a plurality of through holes, and one end of at least part of the through holes is used for communicating with one end of the vacuum hole; the other ends of at least part of the through holes are correspondingly provided with airflow indicating pieces, and the airflow indicating pieces can generate position changes under the action of airflow. When the other end of the vacuum hole of the mold is subjected to an air blowing test, whether the vacuum hole of the mold is blocked or not can be determined by observing whether the position of the airflow indicator in the mold test jig provided by the utility model is changed or not, so that the test accuracy and efficiency are improved.

The invention relates to a characterization test device (1) for a lost-wax casting manufacturing process for a turbomachine part (30). The test device (1) comprises: - a shell mold specimen (2) made of refractory material extending along a principal axis (A) and having an internal cavity (8) extending along the principal axis (A), and - a test core (3), representative of a foundry core, installed in the internal cavity (11) and fixed to the shell mold specimen (2) by means of anchoring means (12). The shell mold specimen (2) comprises at least one observation window (11) formed in a wall of the shell mold specimen (2) and opening into the internal cavity. Figure for the abstract: Fig. 10

The invention discloses an asphalt-aggregate adhesion performance dynamic estimation method and device and application, and the estimation method comprises the following steps: obtaining a microscopic index and a microcosmic index of an asphalt binder of an asphalt-aggregate system under the action of erosion, and analyzing to obtain a first index; obtaining a microscopic index and a microcosmic index of the aggregate after the surface asphalt of the asphalt-aggregate system is removed, and analyzing to obtain a second index; obtaining the adhesion force between the asphalt and the aggregate of the formed test piece under the erosion action, carrying out principal component analysis according to the correlation between the adhesion force and the first index and the second index, and determining a comprehensive factor for expressing the microscopic index of the adhesion force; the method comprises the following steps: acquiring a correlation between a comprehensive factor of a microscopic index for expressing the adhesion force of asphalt-aggregate system test pieces of different aggregate types and the adhesion force between asphalt and aggregate, constructing an asphalt-aggregate interface adhesion force estimation model, and performing estimation analysis. The method has the advantages of dynamic estimation, wide application range and accurate estimation.

The invention relates to a preparation method of a built-in Kevlar skeleton master mold of a helmet. The preparation method comprises the following steps: S1, drawing a three-dimensional model of a helmet structure; s2, drawing a three-dimensional model of a Kevlar skeleton according to the design data of the three-dimensional model of the helmet structure; s3, the three-dimensional model of the Kevlar skeleton and the three-dimensional model of the helmet structure are matched and revised, if the matching is not qualified, the three-dimensional model of the revised Kevlar skeleton is drawn, and if the matching is qualified, the three-dimensional model of the Kevlar skeleton is used as basic data for drawing the three-dimensional model of the Kevlar skeleton master model, and the three-dimensional model of the Kevlar skeleton master model is drawn. The method is used for synchronously designing and manufacturing a master mold for manufacturing the Kevlar skeleton and a silica gel mold, the development period can be shortened, the Kevlar skeleton can be used when a helmet mold is subjected to EPS molding test for the first time, the risk of uncertainty of manual design and manufacturing of the master mold is eliminated through matching confirmation of Kevlar skeleton 3D modeling and helmet 3D modeling data, and the production efficiency is improved. And the first-pass yield and the mass production yield of the test mold are improved.

The utility model provides a half-model supporting device and half-model test equipment with the same, the half-model supporting device comprises a frame and a pitching adjusting assembly, the pitching adjusting assembly comprises a supporting frame and a rotating disc, the supporting frame is movably connected with the frame along the vertical direction, and the rotating disc is rotatably connected with the supporting frame; one of the rotating disc and the supporting frame is provided with a limiting groove, the limiting groove extends in the circumferential direction of the rotating disc, the other one of the rotating disc and the supporting frame is provided with a limiting piece, and the limiting piece is matched with the limiting groove so that the rotating disc can rotate between a first preset position and a second preset position. And the first preset position and the second preset position are spaced in the circumferential direction of the rotating disc. The half-mold supporting device disclosed by the utility model is relatively high in test accuracy.

The invention provides an automatic assembly method and system for an all-solid-state mold test battery, a medium and a product, and relates to the field of solid-state battery assembly.The method comprises the steps that a pressurizing unit is controlled to apply pressure to an all-solid-state battery mold in the axial direction till a target pressure maintaining state is achieved; in the process of maintaining the target pressure maintaining state, the screw locking unit is driven to screw a fastener into the all-solid-state battery mold, and axial load response parameters of the pressurizing unit are monitored in real time; when it is monitored that the axial load response parameter reaches a preset load transfer threshold value, the screwing-in action of the screw locking unit is stopped, and a die assembly locked through pressure is obtained; and controlling the pressurizing unit to remove the external pressure from the mold assembly according to a preset curve to obtain an all-solid-state battery mold finished product. By implementing the method, seamless connection of the fastener to the internal pressure before the external pressure is removed can be realized, and the authenticity and the accuracy of the internal forming pressure of the all-solid-state battery mold are ensured.

The present application relates to a kind of encapsulation mold test and production data processing and prediction method.The method includes: setting sensor group in each detection position;At least one preset test condition is executed to obtain test data;According to test data, obtain the multi-condition strain correlation prediction model of each detection position in preset test condition;Sample production data obtained by each sensor group;Compare the comparison value of production data and test data under the same test parameter in preset test condition, obtain model error;Update model error to multi-condition strain correlation prediction model, in multiple preset production cycle, the model error attenuation value under the same test parameter is calculated, the performance attenuation value of the packaging mold to be measured in each preset production cycle is predicted;According to performance attenuation value, the production quality failure threshold of the packaging mold to be measured is calculated.The present application predicts mold performance attenuation and calculates production quality failure threshold, effectively improves production stability and mold service life.

The utility model discloses a concrete compression resistance mold testing device, and relates to the technical field of constructional engineering quality detection equipment, the concrete compression resistance mold testing device comprises mold testing boxes and a machine table, the mold testing boxes are used for forming concrete blocks, through holes are formed in the bottom walls of the mold testing boxes, and the machine table is connected with the multiple mold testing boxes; pushing rods used for pushing concrete blocks are arranged on the outer bottom walls of the multiple test mold boxes, the concrete blocks are located in the test mold boxes, and the machine table is provided with a driving assembly used for providing power for the pushing rods. The concrete block demolding device has the effect of preventing the concrete block from being clamped during demolding to a certain extent and causing demolding inconvenience.

The present invention discloses a brush for quickly painting a test mold and a method for using the brush, comprising a long rod, a handle arranged on the long rod, a cylindrical brush head arranged on the long rod for painting the test mold, and a foldable frame arranged inside the cylindrical brush head. When painting large-sized and small-sized test molds, the state of the brush head can be changed by grasping the long rod or a cover. If the size of the test mold is small, the height of the side of the brush head can be reduced by holding the handle, and the release agent will not overflow from the test mold when painting the side wall of the small test mold. After the release agent is squeezed out to the bottom of the test mold, the excess release agent at the bottom can be absorbed back into the brush head after the release agent is brushed back and forth. If the size of the test mold is large, when the cover is held, the long rod is pulled downward due to gravity, and the length of the side of the brush head is stretched to the longest, and the frame can prevent the brush head from falling off, thereby improving the efficiency of painting the side wall of the large test mold.

The invention provides a stress loading system and method for a true triaxial fracturing physical model test device, and the system comprises three groups of loading mechanisms which are respectively arranged in three directions of a rock test piece; the friction force reducing mechanism is arranged on the loading mechanism and can reduce the friction force between the loading mechanism and the rock test piece; the loading mechanism is also selectively provided with a pressure detection mechanism, and the pressure detection mechanism is detachably connected to the loading mechanism.

The invention discloses a mould test detection method and device based on image processing, and relates to the technical field of mould detection. In the method, a first image is obtained, and the first image is an image obtained by shooting a target mould in a culture dish; preprocessing the first image to obtain a second image; inputting the second image into a preset strain model for matching to obtain a first strain number; judging whether the first strain number is equal to a preset strain number or not, wherein the preset strain number is a variety number corresponding to strains placed in a culture dish in advance; and when the first strain number is equal to the preset strain number, determining that the target mould is in a normal state, so as to test the target mould according to the normal state. By implementing the technical scheme provided by the invention, the interference when various strains are directly observed by human eyes is effectively solved, and the accuracy of mould type identification is improved.

This invention discloses a mold trial assembly device for mold processing, belonging to the field of mold trial assembly technology. It includes a trial platform for trial assembly of a moving mold base and a fixed mold base. Four electrically controlled guide pillars are connected to the top of the trial platform via multiple mounting plates. Each guide pillar is connected to a moving mold mounting base and a fixed mold mounting base via multiple guide seats. Each moving and fixed mold mounting base has a receiving groove at one of its four corners. An adjusting robotic arm is connected to the inner end face of each receiving groove. The output end of the adjusting robotic arm is connected to a mounting frame plate for fixing the moving and fixed mold bases via a ring-limiting component. This invention, through the mounting frame plate and ring-limiting component, allows for rapid stress relief processing of the mold before and after trial assembly, and enables seamless separation and repositioning of the mold from the moving and fixed mold mounting bases on the trial platform. This makes the series of adjustment operations before and after the trial assembly process more coherent and efficient, reducing the mold production cycle.

The invention relates to the technical field of cement mortar test mold stripping equipment, and discloses automatic cement mortar test mold stripping equipment and method, and the equipment comprises a feeding conveying line, a code scanning device, a first mechanical arm, a mold stripping mechanism, a second mechanical arm, a laser coding mechanism and a visual inspection mechanism; the feeding conveying line conveys test molds to the code scanning station and the discharging station in sequence, and the first mechanical arm transfers the test molds on the discharging station to the mold disassembling mechanism. The mold removal mechanism comprises a test mold lateral pushing mechanism, a test mold removal placement position and a triple mold test block mold removal placement position, and a positioning mechanism is arranged at the test mold removal placement position; according to the automatic mold removing equipment and method for the cement mortar test mold, the problems that existing manual mold removing is low in efficiency, high in labor intensity and prone to causing the quality problem of a test block and mold damage are solved.

The invention relates to the technical field of engineering test equipment, in particular to an enhanced asphalt mixture Marshall compaction test tamping device and method. The tamping device comprises a tamping barrel, a tamping piece and a driving assembly; a tamping cavity used for being filled with an asphalt mixture is formed in the tamping barrel, a material scraping lubricating plate is arranged in the tamping cavity, holes are formed in the material scraping lubricating plate, and the holes comprise a material scraping hole and a lubricating hole; the tamping piece comprises a pressing plate and a plurality of tamping rods, and the tamping rods are all installed on the bottom side of the pressing plate and connected into the holes of the scraping lubricating plate in a penetrating mode. The driving assembly is installed outside the tamping barrel and used for driving the tamping piece to reciprocate in the axial direction of the tamping cavity so as to tamp the asphalt mixture. The tamping device ensures that a mixture is uniformly distributed in a test mold before being compacted, guarantees the volume index and mechanical property stability of a formed test piece, and improves the reliability of test data.

The invention relates to a manufacturing mold for a polymer-based wear-resistant lubricating material injection shear test piece. The manufacturing mold comprises an upper mold, a middle mold and a lower mold, assembling the middle mold into the test piece groove of the lower mold according to the mode that the test piece round hole is on the left, combining the upper mold according to the mode that injection molding openings are aligned, inserting a test piece round hole positioning pin, carrying out injection molding from right to left, opening the upper mold after injection molding is completed, and integrally taking out the middle mold and the injection molding sample strip from the position of the piece taking groove by using a tool; the whole is used for shear strength testing. According to the invention, the injection shear strength data can be simply and effectively obtained, the mold can flexibly carry out shear performance test and optimization test according to design requirements, and the related research and development cost is remarkably reduced.

A method and apparatus for mold detection based on image processing, relating to the field of mold detection technology. In this method, a first image is acquired, which is an image of the target mold in a petri dish; the first image is preprocessed to obtain a second image; the second image is input into a preset microbial model for matching to obtain the number of first microbial species; it is determined whether the number of first microbial species is equal to the number of preset microbial species, which is the number of species corresponding to the microbial species pre-placed in the petri dish; when the number of first microbial species is equal to the number of preset microbial species, the target mold is confirmed to be in a normal state, so that the target mold can be tested according to the normal state. Implementing the technical solution provided in this application effectively solves the interference of direct human observation of various microbial species and improves the accuracy of mold species identification.

The utility model relates to the field of support mold testing, in particular to a shock absorption supporting table for testing a high-strength support mold. The technical problems that in the using process of a testing supporting table, due to the fact that most structures are single, damping devices are not arranged, the accuracy of a testing result is prone to being affected, and due to the fact that a protection device is not arranged, the personal safety of testing personnel cannot be guaranteed are solved. According to the technical scheme, the shock absorption supporting table for the high-strength support mold test comprises a test body and further comprises a clamping assembly, a lifting assembly, a protection assembly and a shock absorption assembly. The lifting assembly is arranged to prevent equipment or a test support mold from being damaged, the protection assembly enables a tester to clearly observe the retest state of the support mold through the transparent film, the safety of the tester can be protected, and the situation that fragments splash to hurt people in an accident is prevented; and vibration is absorbed and reduced through the damping assembly, vibration transmission is effectively relieved, and enough stability is achieved.

The utility model relates to the technical field of injection mold testing, in particular to an injection mold cooling water channel flow testing device which comprises a water tank, the top end of the water tank is detachably connected with a testboard through bolts, and a fixing mechanism is arranged in the middle of the testboard. The water conveying pipe and the return pipe are symmetrically and vertically fixed to the inner walls of the two sides of the water tank, and the top ends of the water conveying pipe and the return pipe extend out of the test board and are provided with connecting mechanisms; the measuring pipe is vertically fixed to the side, close to the backflow pipe, of the water tank, and a flow testing mechanism is arranged in the measuring pipe. According to the utility model, the liquid level detection of the floating plate is matched with the distance sensor for use, so that non-contact flow measurement is realized, the problem of pressure drop deviation caused by mechanical resistance of a traditional impeller type flow meter is solved, the actual flow characteristics of a mold cooling water channel are truly reflected by test data, and the measurement precision and reliability are improved.

The utility model relates to the field of chemical modeling test, and discloses an environment isolation box, an environment isolation device and a modeling test experimental device. The environment isolation box comprises a box body which is internally provided with a cavity, and the front wall surface of the box body is provided with an opening; the box door is arranged on the opening of the box body; the gas interface is used for supplying gas to the interior of the box body and exhausting gas from the interior of the box body; the power interface is used for supplying power to the interior of the box body; and the pressure gauge is used for obtaining a pressure value in the box body. The environment isolation device adopts the environment isolation box and comprises a main body frame, a display controller, air exhaust equipment and an air storage bottle. The mold test experimental device adopts the environment isolation device and comprises a raw material bottle and a conveying pump. The conveying pump is used for solving the problem that water vapor and oxygen are mixed when the conveying pump conveys reaction materials, and the effects that the reaction materials are conveyed under the water-free and oxygen-free conditions, and the accuracy of model test experimental data is improved are achieved.

The invention provides a manual core setting mechanism for a large sand core, which comprises a rectangular frame, a first clamping part, a second clamping part and a plurality of supporting parts, the supporting parts are distributed around the bottom of the rectangular frame, one end of each supporting part is fixedly arranged at the bottom of the rectangular frame, and the other end of each supporting part abuts against a supporting point on the sand core; the first clamping part and the second clamping part are both adjustably arranged on the rectangular frame, the first clamping part and the second clamping part are symmetrically arranged, and the first clamping part and the second clamping part can get close to each other or get away from each other; the end, close to the bottom, of the first clamping part is attached to the inner wall of the top of a first through hole in a first longitudinal beam of the sand core. The end, close to the bottom, of the second clamping part is attached to the inner wall of the top of a second through hole in a second longitudinal beam of the sand core, and the second clamping part and the first clamping part are the same in structure. Grips are arranged at the two ends of the rectangular frame. The device is compact in structure and convenient to use, the scalding risk of an operator can be reduced in the mold testing stage, and the mold testing debugging efficiency is improved.

The invention discloses a single-piece die management system and method and related equipment, and the whole management process comprises a single-piece analysis stage: carrying out the analysis and evaluation of a single piece from the three aspects of a single piece concept, a design drawing and a die flow according to the inputted basic information of the single piece and a corresponding die when the single piece die is managed; in the single-piece mold manufacturing progress management and control stage, progress management and control information and / or early warning information of a single piece can be generated according to the progress management and control stage; in the single-piece mold test control stage, interaction with test equipment can be carried out according to a preset test process, a single-piece mold is tested, and a test result is judged; and in the production parameter control stage, related parameters of single-piece mold production are input, and query, calling and comparison are formed on the basis. According to the single-piece mold management system scheme provided by the invention, the single-piece mold can be comprehensively and effectively managed from a single-piece mold development stage, a single-piece mold manufacturing stage, a single-piece mold testing stage and a single-piece mold production stage.

The utility model relates to a test mold cover plate for detecting the strength of cement mortar. The test mold cover plate for cement mortar strength detection comprises a rectangular plate body, the length of the plate body is 18-19 cm, the width of the plate body is 15.5-16.5 cm, the thickness of the plate body is 4 mm, supporting columns extending to the two ends of the plate body in the width direction of the plate body are arranged at the two ends of the lower side face of the plate body in the length direction respectively, the height of the supporting columns is 3 mm, and the height of the supporting columns is 4 mm. A groove used for containing a label is formed in the center of the upper side face of the plate body. The size of the test mold cover plate for detecting the strength of the cement mortar is enlarged, when the test mold cover plate is used, the cover plate directly covers the upper side of a test mold, the operation is simple and convenient, the distance between the cover plate and the test mold is adjusted to be 3mm, and the contact probability of the cover plate and cement is reduced. Besides, the groove is formed in the upper side of the cover plate, the label is placed in the groove, and the pressing plate is arranged on the upper side of the groove, so that the label is prevented from falling off or being blown off in the maintenance process, and the problems that mold testing is disordered and cannot be distinguished are solved.