147 results about "Cavity pressure" patented technology

The invention relates to the technical field of process control, in particular to an injection molding process optimization method and device, computer equipment and a storage medium, and the method comprises the following steps: obtaining stress signals of four tie bars of an injection molding machine, calculating a total mold locking force, and preprocessing the stress signals through temperature compensation and moving average filtering; real-time mold cavity pressure is calculated based on a mold filling stage linear model, a pressure maintaining stage quadratic function model and a cooling stage exponential attenuation model triggered by an injection molding machine control signal; generating a standard curve template with a confidence interval according to the characteristic parameters of the qualified sample, and dynamically updating the standard curve template; and comparing the current pressure curve with a standard template output quality judgment result in real time, and triggering automatic parameter adjustment to form closed-loop control. The device and the method have the effect of solving the problems of high cost, poor compatibility and difficulty in maintenance when the pressure of the die cavity is directly measured.

The invention provides a plastic mold intelligent optimization system and method based on digital twinning. The method comprises the steps that a digital twinning model integrating mold cavity geometry and an injection molding machine hydraulic device is established; time sequence data of cavity pressure and screw movement in the filling and pressure maintaining stage are used as input, and PVT characteristic parameters and melt leading edge viscosity attenuation coefficients of the polymer melt in the current production period are identified and updated on line; on the basis of the PVT characteristic parameters and the melt front edge viscosity attenuation coefficient, predicting and generating a dwell pressure curve required for achieving a predefined cavity pressure balance curve in the next period; in the pressure maintaining stage of the next production cycle, the amplitude of the pressure maintaining pressure curve is adjusted according to the dynamic deviation of the cavity pressure detected in real time and the cavity pressure balance curve, a compensation control signal is output to an injection molding machine executing mechanism, and self-adaptive closed-loop adjustment of the cavity pressure is achieved. Based on the above scheme, feedforward optimization based on material characteristics and feedback control of AI disturbance can be realized.

The invention relates to a quantitative measurement system and method for mechanical properties of soft tissue and electronic equipment, and the system is characterized in that a pre-negative pressure cavity is in preset negative pressure, and a direct negative pressure cavity is in sealed contact with the measured soft tissue; the first control part loads and maintains target negative pressure to the direct negative pressure chamber according to a preset time sequence; the second control piece is used for releasing pressure and resetting the direct negative pressure chamber; the pressure acquisition part acquires the actual pressure in the cavity; the displacement acquisition part acquires the displacement of the tested soft tissue at the opening of the direct negative pressure chamber; the state detection piece detects the actual state between the direct negative pressure chamber and the detected soft tissue; the control part generates a control instruction and generates soft tissue mechanical property quantitative measurement data in combination with actual intracavity pressure and displacement. Therefore, the problems of high maintenance cost, strong operation dependence, poor repeatability, difficulty in programming scheduling of key test conditions, poor flexibility and configurability and the like caused by large volume of the gas circuit and the detection unit in the related technology are solved.

An insulation compaction device includes an insulating structure of an appliance and has an insulating media disposed within an insulating cavity. An operable piston selectively engages the insulating structure and operates to define a selected cavity volume of the insulating cavity and a selected insulation density of the insulating media. A valve is attached to the insulating structure and in a passive state releases gas from the insulating cavity to the exterior during operation of the operable piston. Selective operation of a pump mechanism places the valve in an active state to extract gas from the insulating cavity and define a cavity pressure of the insulating cavity that is less than an equalized pressure. The operable piston and the pump mechanism are at least one of sequentially and simultaneously operable to define a selected piston chamber environment defined by the selected cavity volume and the cavity pressure.

The utility model discloses a shoe with a buffer structure, and relates to the technical field of shoe bodies. The shoe with the buffer structure comprises a shoe sole and the buffer structure arranged in the shoe sole, and at least one cavity capable of being filled with fluid is formed in the buffer structure; the cavity is at least partially provided with an open structure before being filled, a closed structure is formed after the cavity is filled with fluid through the open structure, and the volume of the cavity does not exceed the total volume of the buffer structure. According to the utility model, by filling different fluids and matching with the intelligent supplement module, the real-time dynamic adjustment of the buffer characteristic is realized. The supplementing module is matched with the micro electric pump and the Bluetooth communication module through the sensor to form a closed-loop control system, the pressure of the air cavity is monitored in real time through the air pressure sensor, and the micro pump is controlled to supplement air through the control module.

This invention proposes an integrated vacuum pumping system for the exterior of a vacuum evaporation machine, comprising a coarse pumping pipe and a fine pumping pipe. A first three-way pipe and the fine pumping pipe are connected by a telescopic motor that drives the valve cover to rise and fall, enabling rapid switching between the coarse and fine pumping lines and avoiding vacuum fluctuations. Under the precise pressure control of the telescopic motor, the valve cover maintains uniform contact pressure on the sealing surface. The transition pipe directly connects the coarse and fine pumping pipes, eliminating flow channel redundancy in traditional multi-valve systems and reducing gas flow resistance. The telescopic motor is linked with a vacuum sensor to automatically switch the pumping mode based on the cavity pressure threshold, avoiding errors caused by manual intervention. The integrated three-way pipe reduces external connecting components, shrinks the equipment size, and lowers manufacturing costs and maintenance complexity.

This invention relates to the field of dual-cavity pressure sensors, and discloses a dual-cavity pressure sensor with a flexible corrugated diaphragm, comprising: a corrugated diaphragm, a pressure-sensing layer, and a substrate; the corrugated diaphragm is disposed on the upper side of the pressure-sensing layer; the pressure-sensing layer is sealed on the upper side of the substrate; a first pressure-sensing cavity and a second pressure-sensing cavity are spaced apart on the side of the pressure-sensing layer near the substrate; deformation sensing components are disposed inside and / or outside the first and second pressure-sensing cavities; the deformation sensing components include a resistance sensing part or a capacitance sensing part; the resistance sensing part is disposed inside the corrugated diaphragm; the capacitance sensing part is disposed inside the first and second pressure-sensing cavities. The flexible corrugated diaphragm effectively alleviates the fatigue fracture problem caused by stress concentration in the pressure-sensing layer, extending the service life of the sensor; the combined resistance and capacitance measurement improves detection sensitivity.

The invention belongs to the technical field of aviation, and particularly relates to an engine bearing cavity ventilation system simulation calculation method considering pump suction performance, which is based on a flow simulation calculation platform and adopts elements such as a cylindrical pipeline, an elbow, a transition joint, a throttling hole, a flow source, a pressure source, a controller and a signal collector. Components such as a pipeline, a sealing device, a bearing cavity and a lubricating oil pump set are represented, an engine bearing cavity ventilation system simulation calculation model considering pump suction characteristics is constructed, parameters such as pressure and ventilation quantity of the bearing cavity can be accurately calculated, and the influence mechanism of the parameters such as structures, flow, pressure and throttling hole diameters of different components on the ventilation system is revealed. According to the scheme, modular elements are adopted, the system layout and related parameters can be conveniently and rapidly adjusted, the design accuracy and calculation efficiency of the bearing cavity scheme are improved, and the high cost generated by redeveloping a new ventilation system is reduced.

The invention relates to the technical field of part cleaning, in particular to a hardware part cleaning device and method for an internal complex environment. And a robot can be matched to assist workpiece positioning and conveying, and cleaning automation and precision are improved. The device comprises a dry ice supply system, an air source system, a mixing ejector, a cleaning cabin, a negative pressure recovery system and the like, according to the method, a sealed cleaning cavity is constructed through a sealing assembly and a sealing cover, negative pressure recovery is started to establish initial negative pressure, then gas-solid two-phase flow formed by mixing dry ice and compressed air is intermittently injected, and the cavity pressure is periodically adjusted; and the cleaning medium fully permeates deep and long oil ducts and gaps, and pollutants are continuously pumped out in cooperation with negative pressure. The problems of kinetic energy attenuation and cleaning dead angles of existing dry ice cleaning complex inner cavities are solved, cleaning is efficient and thorough, secondary pollution is avoided, the robot assists in optimizing the cleaning process, and the robot is suitable for complex inner cavity hardware parts such as industrial gearboxes.

The application discloses a loader and a vehicle-mounted weighing method thereof. The vehicle-mounted weighing method of the loader comprises the following steps: establishing a linear model in the lifting process of the loader under different working conditions, acquiring the size cavity pressure difference of a boom cylinder, the boom angle and the boom angular velocity corresponding to different working conditions, and the maximum load weight of the loader in real time; calculating the full-load theoretical pressure difference and the empty-load theoretical pressure difference of the loader according to the size cavity pressure difference of the boom cylinder, the boom angle and the boom angular velocity corresponding to different working conditions; and calculating the actual weight of the load of the loader according to the size cavity pressure difference of the boom cylinder, the maximum load weight, the full-load theoretical pressure difference and the empty-load theoretical pressure difference in the actual lifting and weighing process of the loader. The technical scheme provided by the embodiment of the application has high flexibility for vehicle-mounted weighing.

The invention provides a low-Reynolds-number wing design method based on a cavity pressure pneumatic flexible coupling effect, and relates to the technical field of aircraft design, the method comprises the following steps: detecting the flow separation position of a low-Reynolds-number wing to obtain the mounting position and laying length of an elastic wall plate; the method comprises the following steps: analyzing the airfoil shape of a wing by using the mounting position and laying length of an elastic wallboard, enabling the elastic wallboard to coincide with the shape of the mounting part of the wing in a non-deformation state to obtain the chordwise shape of the elastic wallboard, and testing by using the pressure value of the dynamic pressure in the flight process of the low-Reynolds-number wing. The thickness and material selection of the elastic wall plate are obtained, the cavity pressure value is obtained through calculation according to the lift force of the rigid wing body and the lift force of the wing body provided with the elastic wall plate, the low-Reynolds-number wing provided with the elastic wall plate is adjusted, and the improved low-Reynolds-number wing profile is obtained. The problems of how to improve the lift-drag ratio of the wings and prolong the endurance time of the aircraft are solved.

The application provides a vacuum mixing process optimization method and system, which comprises collecting mixing container cavity pressure, jacket temperature, material torque, stirring speed, and air extraction flow signal, calculating pressure change rate, torque fluctuation amplitude, air extraction amount per unit time, and pressure fluctuation characteristic quantity, dividing the vacuum mixing process into four stages of initial exhaust, bubble release, viscosity climb, and densification stability; in the initial exhaust section, the vacuum valve opening degree and time length are controlled according to the air extraction amount and the pressure change rate, and the pressure response delay is recorded; in the bubble release section, an air extraction and stop alternating sequence is generated, and the air extraction and stop time length is corrected in combination with the delay; in the viscosity climb section, the target pressure interval is determined according to the torque, temperature, and pressure change rate, and the speed and valve opening degree are cooperatively adjusted to stabilize the pressure; in the densification stability section, a stability criterion is constructed, and the valve opening degree is controlled as needed; when adjacent stages are switched, the target pressure starting point, valve opening degree initial value, speed initial value, and control period of the next stage are corrected according to the end parameters of the previous stage.

The invention relates to a forging return stroke electro-hydraulic system adopting discrete liquid volume units and a control method.The system comprises a plurality of oil tanks connected with a controlled pressure containing cavity in parallel at the same node, and the first end and the second end of each oil tank are connected with a reversing valve and a one-way valve correspondingly to form a volume unit capable of being independently gated; all the oil tanks jointly form a parallel oil tank group; the plunger type cylinder is connected with a node of the parallel oil tank set, oil in the plunger type cylinder flows into the return oil tank to be compressed when the hammer head enters, and oil in the return oil tank flows into the plunger type cylinder to provide return force for the hammer head when the hammer head retreats. According to the working frequency requirement, the forging force requirement and the oil elasticity modulus fluctuation condition of the hammer head, the return stroke oil tank is controlled to reach the maximum volume allowed by the working condition through the combination of discrete volume units, and meanwhile the set pressure of the system is adjusted according to the maximum pressure value of the plunger cavity; the pressure curve of the plunger cavity can cover the minimum return stroke pressure requirement in real time, and the return stroke requirements of the hammer head under various working conditions of different working frequencies, forging forces and different oil liquid elasticity moduli in a large range are met.

The application discloses an active sealing device for a water-tight cavity, and belongs to the technical field of water-tight sealing structure design. The device comprises a self-adapting sealing assembly and a cavity pressure regulating system. The self-adapting sealing assembly comprises an elastic liquid bag array, a flexible sealing belt, a sealing ring and a sealing ring arranged on the top of the self-adapting sealing assembly. The self-adapting sealing assembly is installed between the cavity body and the cavity cover of the water-tight cavity. When the pressure of the liquid bag in the elastic liquid bag array is lower than the set threshold, the air pressure regulating pipeline in the cavity pressure regulating system indirectly increases the water injection pressure of the liquid bag through the pressure compensator, the elastic liquid bag array expands in volume by injecting fluid medium, drives the sealing ring to displace along the axial direction, and makes the sealing ring and the cavity cover form an interference fit and establish a sealing interface. The application effectively overcomes the failure propagation defect of the traditional single sealing structure, and is suitable for long-term stable sealing requirements in deep sea environment.

The invention belongs to the technical field of liquid metal 3D printing, and particularly relates to a jet flow control system for melt impact, which comprises an upper cavity device, a vacuumizing system, a gas supply system, a pressure monitoring device, a main controller and an upper computer, an upper cavity pressure gauge is mounted at the upper part of the upper cavity device and is used for monitoring the gas pressure in the upper cavity device in real time; a nozzle is arranged on the lower portion of the upper cavity device, the gas supply system is communicated with the upper cavity device, the vacuumizing system is communicated with the upper cavity device, and the upper computer, the upper cavity pressure gauge, the gas supply system and the vacuumizing system are all in communication connection with the main controller. The upper computer is used for inputting an operation instruction to the main controller, so that the main controller controls the gas supply system and the vacuumizing system based on the operation instruction and the gas pressure; through non-mechanical on-off control of gas pressure, rapid opening and closing of jet flow are achieved, it is guaranteed that the solidification and forming process of a molten pool is controllable, and a series of problems caused by a mechanical switch are avoided.

An insufflator is operable in a set-up mode and in a normal insufflating run mode. In the set-up mode, a pressure / volume relationship between cavity pressure and cavity volume of the cavity of a subject is determined. A minimum safe working pressure value and a maximum safe working pressure value of a working pressure range for the cavity to be insufflated is determined from the pressure / volume relationship as a pressure value just above a lower point of inflection and an upper point of inflection of the pressure / volume relationship, respectively. In the normal insufflating run mode a working pressure value is selected from the range of working pressure values and the insufflator insufflates the cavity to the selected working pressure value. Also disclosed is an insufflating system comprising an insufflator operable in a set-up mode and in a normal insufflating run mode. A controller located remotely relative to the insufflator remotely controls the insufflator to operate in the set-up mode and / or the normal insufflating run mode.

The invention relates to the technical field of medical instruments, in particular to a cavity pressure and temperature cooperative control method, a cavity pressure and temperature cooperative control system and perfusion equipment. The control module increases the suction flow of the suction device according to the temperature error so as to reduce the actual temperature in the operation cavity; and the control module increases the perfusion flow of the perfusion device based on the pressure change amount in the operation cavity caused by the increase of the suction flow so as to compensate the pressure in the operation cavity.

The invention discloses a spiral self-sensing soft robot, and belongs to the technical field of soft robot sensing, the spiral self-sensing soft robot comprises a main body made of an elastomer material, the main body is provided with a tubular cavity and a tube wall, and an outer spiral line is formed on the tube wall; the metal spring is embedded in the outer spiral line, and the spiral parameter is matched with the spiral parameter of the outer spiral line; when the main body generates axial telescopic deformation under the action of pressure change of the inner cavity, the metal spring deforms synchronously along with the main body, and the inductance value of the metal spring corresponds to the axial length of the main body and serves as a feedback signal of closed-loop control. The sensor provided by the invention provides a sensing hardware basis for closed-loop control, has the characteristics of high repeatability, low hysteresis quality and large elongation under the condition of external load, and provides potential for sensor integration of a sectional continuum robot.

The invention relates to the technical field of new energy automobile accessories, in particular to a new energy relay shell and an additive mixing manufacturing method thereof. Performing array printing on the outer surface of the functional skeleton to generate a preset directional deformation assembly, and performing integrated printing in the functional skeleton to generate a three-dimensional variable cross-section arc extinguishing flow channel; scanning and activating the surface of the functional skeleton by adopting a plasma beam, and then depositing a silane coupling agent layer; putting the functional framework into an injection mold, and injecting a thermoplastic engineering plastic melt into the mold; the pressure of the mold cavity is maintained until the temperature of the injection molding layer is reduced to be lower than the crystallization temperature, the deformed preset directional deformation assembly is fastened through the volume shrinkage rate of the injection molding layer, the thin plate is induced to be directionally bent through the heat flow deformation technology, and dynamic mechanical counterforce balance is formed through the rebound potential energy of the thin plate and the shrinkage force of the injection molding layer. And the IP67 protection requirement of the high-voltage relay of the new energy automobile is met.

The application provides a glass blowing equipment with a rapid cooling structure, relates to the field of glass blowing, and comprises an operation table, a secondary table fixedly connected to the top of the operation table, a tertiary table fixedly connected to the top of the secondary table, a gas pump fixedly connected to the top of the operation table, a gas injection pipe connected to the top of the gas pump through a pipeline, and an operation pipe arranged on the outside of the gas injection pipe. The pressure sensor of the detection pipe can be used for real-time monitoring of the air pressure on the inside of the glass cavity. The electric telescopic rod can be fed back in real time through the pressure sensor data, so that the telescopic part of the electric telescopic rod can push the supporting spring to elastically contract. The current air pressure of the glass product can be adjusted in real time according to the elastic tension of the press switch. The problems that the existing blowing equipment is inconvenient for the operator to feel the cavity pressure inside the glass product in real time when the machine is used to inject air and is inconvenient for the operator to improve the feeling degree of the glass product blowing during the operation process are solved.

The present application provides a kind of thick wall nitrogen physical foaming core-pulling mould and its using process, the mould includes the mould body with cavity, the feed end being communicated with cavity and the core-pulling mechanism being movably arranged on mould body, and the core-pulling core of core-pulling mechanism constitutes the side wall of cavity.The present application controls the core-pulling core to move from first position to second position by core-pulling mechanism after injection melt is filled to preset proportion, dynamically expands cavity volume and cooperates cavity pressure gradient release, guides supercritical nitrogen to uniformly nucleate and grow in mutual solution melt.Solve the quality defects of large bubble and uneven cell in nitrogen foaming process in thick wall plastic product in prior art, realize the accurate regulation of cavity volume by inclined plane transmission type core-pulling structure, and the weight reduction ratio of thick wall product is stably improved from 30%-40% to 50%-60% compared with traditional method, while the mechanical properties and structural integrity of product under high weight reduction are guaranteed, and it is suitable for batch production of thick wall products in various fields.

The utility model relates to a hot runner structure for thick -walled product injection moulding, including hot nozzle, valve needle and heating cover, the glue outlet is to the thickness direction of cavity glue injection, heating cover is sleeved in the glue end of hot nozzle, along the glue direction of hot nozzle, be equipped with first heating element, second heating element, third heating element on the heating cover, the interval of first heating element and second heating element in hot nozzle glue direction is greater than the interval of second heating element and third heating element in hot nozzle glue direction, and, in the radial direction of hot nozzle, third heating element is more close to the glue outlet of injection runner than second heating element. The utility model's setting three groups of heating elements continuously heat in the glue direction of hot nozzle, can keep the temperature of the molten plastic of glue end, avoids the problem that the molten plastic cools down because thick -walled cavity pressure -holding time is longer.

The utility model discloses a shoe inner cavity pressure testing device which comprises a foot mold, the foot mold is made of soft elastic materials, the foot mold is provided with an air cavity, and the air cavity is filled with air and is arranged in a closed mode so that the foot mold can expand to make contact with the inner wall of a shoe to generate pressure. And the pressure measuring module comprises pressure sensors, and the pressure sensors are arranged at multiple positions of the outer surface of the foot mold so as to detect the pressure borne by the foot mold in real time. During testing, the pressure value of the shoe inner wall at the corresponding position on the foot mold can be measured through the pressure sensor on the outer surface of the foot mold, the pressure condition of the inner cavity of the shoe is obtained, and a tester is assisted in objectively judging the fitting property and wearing comfort of the shoe.

The invention relates to the technical field of Internet of Things, in particular to a working condition identification method and system applied to an excavator. The excavator is provided with a hydraulic oil cylinder. The method comprises the steps that a real-time motion data set of the excavator is obtained; performing feature engineering processing on the real-time motion data set to obtain a target feature vector set; inputting the target feature vector set into a preset working condition recognition model for working condition recognition to obtain a target working condition recognition result; wherein the real-time motion data set comprises at least one of real-time oil cylinder displacement data, real-time oil cylinder angular velocity data and real-time oil cylinder pressure data. The action posture of the excavator is recognized according to parameters such as hydraulic oil cylinder displacement, hydraulic oil cylinder angular velocity and hydraulic oil cylinder large and small cavity pressure, the capacity of distinguishing the difference between complex action combinations is improved, the similar working conditions of the excavator are distinguished accordingly, and the accuracy of excavator working condition recognition is improved.

The application discloses a kind of hot strip bending roll force value detection precision judging method, this method is used in hot strip finishing mill group, comprising: determine whether the rack of finishing mill enters roll changing state, after entering roll changing state and the release of rack working roll balance mode, the rod cavity pressure detection value of current rack is obtained at bending roll hydraulic cylinder;According to the rod cavity pressure detection value of bending roll hydraulic cylinder obtained, whether the bending roll force value detection precision is abnormal is judged.The hot strip bending roll force value detection precision judging method of the application can determine whether the accuracy of strip bending roll force value detection precision to ensure the control precision of strip bending roll force, can solve the problem of unstable shape of hot strip finishing strip due to bending roll force measurement abnormality, reduce the strip shape quality objection of hot strip finishing mill group.

An impact-resistant, sealing and cooling integrated bearing of a pneumatic starter comprises an inner ring, an outer ring, rolling bodies and a sealing cover, the inner ring is composed of a first inner ring and a second inner ring which are detachably connected, and the rolling bodies are assembled on the outer surfaces of the first inner ring and the second inner ring respectively; first grooves are symmetrically formed in the inner circular surface of the outer ring, a buffering base body is embedded in the grooves, and the buffering base body comprises a honeycomb-shaped elastic base body and a plurality of wave-shaped metal elastic rings arranged on the honeycomb-shaped elastic base body in a sleeving mode; an annular main channel and an integrally-formed boss are arranged in the outer ring, a plurality of contact blocks are arranged on the boss, each contact block is fixedly connected with a flow guide block located in the annular main channel through a connecting rod, a friction disc is further arranged between the rolling bodies, and a plurality of protrusions connected with the outer edge of the friction disc are arrayed on the friction disc. Impact energy is absorbed through the buffering base body, the pressure of the cavity is monitored and regulated in real time through the pressure sensor, self-adaptive regulation of the flow of cooling liquid is achieved by driving the flow guide block through the friction disc, and the impact resistance, the sealing performance and the cooling efficiency of the bearing are remarkably improved.

The invention relates to a self-calibration and drift compensation method for a flow velocity baffle of a transformer gas relay. The method comprises the following steps of: acquiring an alarm state, a tripping state and a cavity pressure change of a gas relay as well as a short-circuit current event, tripping sequence information and oil temperature transition information of a transformer; when the pressure of the cavity continuously rises in one direction within the preset time, the gas accumulation risk is judged, when the flow velocity baffle continuously deflects within the preset time and the contact is increased in a critical jitter mode, the strong oil flow risk is judged, and self-calibration is forbidden if any risk is true; when the gas accumulation risk and the strong oil flow risk do not exist, entering a self-calibration session and locking a flow speed baffle action threshold value setting parameter; during the session, only read-only sampling is carried out, and the calculated threshold compensation amount is written into a shadow parameter area; self-calibration is prohibited actively when a gas accumulation risk or a strong oil flow risk exists, so that the action threshold is prevented from being adjusted mistakenly under unstable working conditions such as a real fault, external electric disturbance or strong oil flow impact.

This invention discloses a magnesium alloy vehicle frame die-casting molding apparatus, belonging to the technical field of die-casting equipment. It includes a machine base, on which a base platform and a fixed mold are fixedly mounted. An injection chamber is fixedly mounted on the base platform, and a cavity is formed on the fixed mold. The advantages are: This apparatus addresses the problem that traditional venting channels only reach the edge of the cavity, are difficult to access deep cavities, and are located in corners. Through a linkage design between the external venting needle and the guide tube, the external venting needle can penetrate deep into the corners and move dynamically with the injection action, venting residual gas in the corners and avoiding defects such as porosity and shrinkage, thus ensuring the strength of the vehicle frame. Simultaneously, addressing the problem of low venting efficiency and easy backflow clogging with fixed-diameter venting, the eccentric fine hole of the internal venting needle rotates synchronously with the injection, changing its diameter. This allows for large-scale venting in the initial stage and prevention of clogging in the later stage, eliminating the need for frequent machine shutdowns for cleaning. Mechanical transmission allows the venting position and diameter to adapt to changes in cavity pressure and gas volume in real time, matching the filling rhythm and significantly improving die-casting quality and production stability.

According to the hydrostatic pressure sliding block integrating state monitoring and flow self-adjusting, key parameters such as the oil film temperature, the oil cavity pressure and the oil film thickness can be monitored in real time through multi-source heterogeneous sensing signals such as the temperature sensor, the pressure sensor and the eddy current sensor, and the running state of the hydrostatic pressure sliding block is evaluated; early weak faults are recognized through signal processing, feature fusion and fault decision, the pressure of an oil cavity of the static pressure sliding block can be spontaneously adjusted in real time through elastic deformation of a metal film in the self-feedback adjusting module, the flowing state of a liquid oil film can be adjusted through the oil sealing edge, pressure distribution of liquid on the oil sealing edge of the sliding block is optimized, and the service life of the sliding block is prolonged. The bearing capacity is improved, the flow speed of liquid is adjusted, and the resistance in the liquid flowing process is changed.

The utility model discloses cold extrusion male die negative pressure cavity pressure increasing valve mechanism belongs to mould processing technical field. Cold extrusion male die negative pressure cavity pressure increasing valve mechanism, including valve body, the one end of valve body is provided with valve bush, and the other end of valve body is provided with the plug, wherein, the plug is connected with the valve body telescopic, the inside of valve body is provided with valve cavity, and the inside of valve cavity is provided with compression spring. To solve the problem that needs to repeatedly spin the operation in the product forming process, can product inner wall and spinning core core adhere, because wall body is thicker than wall bottom, more repeatedly spins to make wall body thickness reach the problem of requirement, through the high pressure medium of injection in single extrusion stroke, instantaneously produces strong negative pressure adsorption force and even radial pressure, one-time or a few times spin pressure can realize the close adhesion of wall body and core core, and the material is driven to the wall part flow thickening with strong force, eliminates the demand of repeatedly spinning.