1588 results about "Hot runner" patented technology

The invention relates to a full-automatic injection molding optimization method, device and equipment based on digital twinning, and belongs to the technical field of intelligent manufacturing equipment. Inputting the sensor data into a digital twin model to construct equipment dynamic response simulation, and synchronously comparing the actual mode locking force with the offset of a preset pressure threshold; generating compensation data of mold locking pressure according to the offset, and dynamically correcting an acceleration curve of a servo motor in a glue injection stage on the basis of the displacement of a screw rod; in hot runner control, a thermal interference compensation coefficient is calculated according to a temperature difference value of adjacent temperature zones, and an output power gradient signal of each heating ring is adjusted; the corrected parameter information is transmitted to an equipment PLC through an industrial bus to execute control, and a compensation coefficient threshold value is iteratively updated according to a product weight fluctuation value in the next forming period; closed-loop data interaction of an equipment control system is achieved, and the injection molding process is optimized.

The invention discloses a temperature control system and method for a hot runner of an injection molding machine mold, and the method comprises the steps that the temperature control system collects the temperature data of each region of the hot runner in real time through a temperature sensor, and carries out the adjustment according to the data feedback; a built-in self-adaptive algorithm automatically adjusts a temperature control strategy according to different injection molding materials and production requirements, such as temperature upper limit, temperature lower limit and heating and cooling opportunities, and the production efficiency is optimized; when the system recognizes temperature fluctuation, a heating mode or a cooling mode is automatically switched, and the cooling system is dynamically adjusted for temperature balance; a plurality of temperature sensors are arranged in a key area of the mold for regional monitoring, and temperature control output is adjusted in real time; meanwhile, an embedded learning algorithm gradually optimizes a temperature control strategy according to historical production data, adjusts control parameters, and improves the production precision and efficiency. According to the temperature control system and the temperature control method for the mold hot runner of the injection molding machine, the problems of low temperature control precision, poor energy efficiency and slow response in the prior art are solved, and efficient and intelligent temperature control capability is provided.

The dynamic hot runner temperature control method suitable for the mold comprises the steps that S1, a temperature sensor is installed in a mold hot runner to collect flow characteristics, heat distribution and temperature original data in the material solidification process, and the temperature original data are transmitted to a temperature control system; s2, the required power adjustment amount Pc is calculated through a PID controller in the temperature control system according to the deviation value delta T between the actual temperature Ta and the set target temperature Ts, and the power adjustment amount Pc is sent to a heater for adjustment; s3, constructing a temperature prediction model M, and predicting the temperature change trend of each section of the mold hot runner through the temperature prediction model M; and S4, a multi-objective optimization function Ft is created, an optimal combination solution St is searched through a particle swarm optimization algorithm PSO, and the optimal set value combination of the hot runner temperature is maintained according to an optimization objective. According to the invention, the energy consumption is reduced while uniform temperature distribution is ensured, the temperature control precision and the response speed are obviously improved, and the requirement of human intervention is reduced.

The invention belongs to the field of production control, and particularly discloses a control method of a thick-wall optical product precision injection molding hot runner system, which comprises the following steps of: acquiring mold geometric data of local thickness distribution in a mold-containing cavity along a melt flowing direction, calculating theoretical cooling time constants of each region by combining material thermophysical parameters, and calculating the cooling time constant of each region; establishing a thickness-cooling rate mapping relation model; predicting the time when the melt reaches each area and the effective cooling time according to an injection time sequence; solving a temperature compensation value of a heating area corresponding to the hot runner by taking the minimum final temperature variance when the key area is ejected as a target; and finally, dynamically applying a compensation value according to a time sequence before the melt arrives, and withdrawing / adjusting after region filling is completed or a pressure maintaining stage is entered. The invention can balance the temperature field of the mold cavity, reduce the refractive index gradient and shrinkage defect, improve the optical performance and yield of the product, and is suitable for precise injection molding of the thick-wall optical product.

The invention relates to the technical field of energy storage module temperature control, in particular to an energy storage module multi-environment temperature automatic regulation and control unit and a regulation and control method thereof.The energy storage module multi-environment temperature automatic regulation and control unit comprises an external protection frame body installed on the outer side of an energy storage module, and an internal heat exchange flow channel used for adjusting the heating value of the energy storage module is arranged in the external protection frame body. According to the energy storage module multi-environment temperature automatic regulation and control unit and the regulation and control method thereof provided by the invention, by adopting the liftable cover body structure design, the heat exchange mode of the energy storage module can be changed according to the temperature change of the internal environment and the external environment, so that the regulation and control performance of the energy storage module at different environment temperatures is improved, and the applicability is improved; the flow direction of an internal heat exchange runner is changed through lifting adjustment of the upper lifting cover, so that heat loss is switched, and the energy consumption of the energy storage module is reduced; and by adopting an automatic regulation and control mode, the operation accuracy can be improved.

The invention belongs to the technical field of temperature control, and discloses a temperature control method and device of a hot runner system for an inverted mold. The method comprises the following steps: defining a critical melt area in a physical sprue which directly influences the product quality in a sprue of a hot runner system as a virtual sprue; dynamically generating a melt viscosity target track of the virtual gate region according to the type of an injection molding material and an injection molding process stage; based on measurable injection molding process parameters and sprue area temperature, estimating a current melt viscosity value of a virtual sprue area in real time through a state observer; calculating to obtain an optimal power control sequence by adopting a multivariable model prediction controller; and driving a sprue area heater according to the optimal power control sequence, so that the actual change of the melt viscosity of the virtual sprue area tracks a melt viscosity target track. According to the invention, the defects such as salivation and wire drawing can be effectively eliminated, so that the sprue quality stability and the production efficiency are improved.

The invention relates to the technical field of temperature regulation and control, and discloses an injection mold hot runner temperature regulation and control system and method based on machine learning, the system comprises a data acquisition module, a temperature threshold setting module and a hot runner temperature regulation and control module; the temperature threshold setting module is used for determining the optimal temperature range of the hot runner based on the injection molding material type, the mold design parameters and the injection molding environment data, and determining the optimal temperature thresholds at different positions in the hot runner in combination with an optimization algorithm; and the hot runner temperature regulation and control module is used for accurately regulating and controlling the temperature in the hot runner according to a comparison result of the real-time temperature data at different positions in the hot runner and the optimal temperature threshold. The precision and the stability of temperature control of the hot runner of the injection mold can be improved, personal errors are reduced, the production efficiency and the product quality can be improved, the rejection rate is reduced, and wide application prospects and economic benefits are achieved.

The utility model discloses a double-conveying direct cooling plate with a spiral capillary channel, the direct cooling plate comprises a structure substrate and a heat exchange cover plate which is overlapped and fixed on the structure substrate, the heat exchange cover plate is provided with a groove, and the groove is sealed by the structure substrate to form a heat exchange flow channel; the groove face of the heat exchange cover plate is provided with a plurality of spiral capillary conveying grooves in the flowing direction of a flow channel, the depth of each capillary conveying groove is 0.1-0.5 mm, and the width of each capillary conveying groove is 0.1-0.3 mm. And the runner is provided with a heat insulation layer on one surface of the structural substrate. According to the direct cooling plate, the spiral capillary channel structure is introduced to the wall face of the flow channel, the contact area of cooling liquid and the wall face is increased, a second conveying mode except the flow channel is provided, and therefore the heat transfer efficiency is remarkably improved. Meanwhile, the design can effectively relieve the formation of an air plug and avoid the occurrence of a heat dissipation dead point so as to adapt to battery packs of different types and powers and meet the temperature control requirements of the battery packs.

The utility model belongs to the technical field of injection molding, and particularly relates to a self-sealing type hot runner structure which comprises a hot runner body, a hot runner is arranged in the hot runner body, one end of the hot runner is communicated with a nozzle of an injection molding machine, the other end of the hot runner is provided with a sprue gate, a spreader and an elastic piece are arranged in the hot runner, and a valve rod is arranged on the spreader in a sliding mode. A plug is arranged at one end, far away from the spreader, of the valve rod, and opens the sprue gate under the elastic action of the elastic piece during injection molding; and when injection molding is completed, the plug overcomes the elasticity of the elastic piece under the action of pressure to plug the sprue gate. The cost of parts is low, the valve rod is short, machining is convenient, and the machining cost is low; and the molten plastic cannot impact the valve rod frontally, so that the property change of the plastic cannot be caused, and the product quality is good.

The invention discloses a double-color injection molding process for an automobile lampshade, and aims to solve the problems of complex process, unstable quality, environmental pollution and the like in the process of realizing a multicolor effect through secondary processing of an existing single-color lampshade. According to the process, a cavity-divided mold design is adopted, a movable mold core is used for switching mold cavities, a primary color material and a cover color material are sequentially injected, and one-time forming of the double-color lampshade is achieved. Transparent polycarbonate is selected as a primary color material, opaque PC or PMMA is selected as a covering color material, and high optical performance and weather resistance are ensured. In the injection molding process, by optimizing process parameters of temperature, pressure, injection molding speed and cooling time, the defects of delamination, flow marks, bubbles and the like among materials are effectively avoided. And a mold runner adopts a balanced hot runner design, so that the material distribution uniformity is improved. The process achieves efficient production of the double-color lampshade, has the remarkable advantages of being excellent in product quality, low in production cost and environmentally friendly, and can be widely applied to the field of manufacturing of automobile lampshades.

The invention discloses a polar plate of a fuel cell and the fuel cell, and relates to the technical field of cells, the polar plate of the fuel cell comprises a polar plate main body, a cooling medium inlet and a cooling medium outlet are arranged along the length direction of the polar plate main body, and a distribution runner is located between the cooling medium inlet and a main heat exchange runner. The main heat exchange runner is positioned between the cooling medium outlet and the distribution runner; the turbulent flow part is arranged in the distribution flow channel and comprises a plurality of first turbulent flow structures, and every two adjacent first turbulent flow structures are spaced. The distribution runner and the main heat exchange runner are formed in the polar plate main body, and the turbulent flow part is arranged in the distribution runner, so that the turbulent flow part can guide and disturb the cooling medium, the distribution uniformity of the cooling medium in the polar plate main body is improved, and the temperature consistency of different positions of the fuel cell is improved; and the turbulent cooling medium can fully flow in the polar plate main body, so that the cooling medium can fully exchange heat, and the cooling effect of the fuel cell is further improved.

The utility model is applicable to the technical field of hot runners, and provides an integral needle valve type hot runner, which comprises a splitter plate, a glue inlet is arranged at the top of the splitter plate, a plurality of hot nozzles are arranged at the bottom of the splitter plate, a nozzle core is arranged in each hot nozzle, and the nozzle core is arranged in the splitter plate. A runner for communicating the glue inlet with each nozzle core is arranged in the splitter plate, and heating wires are arranged on the upper surface and the lower surface of the splitter plate. According to the integral needle valve type hot runner, the plurality of hot nozzles are mounted on the splitter plate, and are uniformly heated by the heating wires on the surface of the splitter plate, so that heating rings of the hot nozzles are omitted, a space for mounting the heating rings does not need to be reserved on the surfaces of the hot nozzles, the lengths of the hot nozzles can be reduced, and the thickness of a template can be further reduced; and a small-tonnage injection molding machine can be used for carrying out injection molding processing on small workpieces, so that production is more convenient.

The invention provides a plate heat exchanger, a heat pump system and a defrosting control method of the heat pump system, and relates to the technical field of heat exchange. The plate heat exchanger is provided with an anti-freezing heating runner, one part of the anti-freezing heating runner is located between a first refrigerant opening and a first edge section, closest to the first refrigerant opening, of the plate heat exchanger, and the other part of the anti-freezing heating runner is located between a second refrigerant opening and a second edge section, closest to the second refrigerant opening, of the plate heat exchanger. Therefore, when the plate heat exchanger is used in a heat pump system, the anti-freezing heating flow channel can be connected to the exhaust port of the compressor of the refrigerant circulating flow channel, so that a high-temperature and high-pressure refrigerant is utilized to heat a local easy-to-freeze area of the water flow channel, and the water flow channel can be prevented from being frozen to a certain extent at least; therefore, the cracking risk of the heat exchange plate is reduced, the working reliability of the heat pump system is improved, the heat pump system is prevented from being damaged, and the heat exchange efficiency of the plate heat exchanger can be improved.

The invention discloses a hot runner injection molding system which comprises a runner heating module, a real-time monitoring module and a dynamic regulation and control module, and the runner heating module heats an injection molding runner and comprises a plurality of heating units distributed at equal intervals in the axial direction of the injection molding runner and a PID temperature control unit used for controlling heating; the real-time monitoring module is used for monitoring the volume flow and temperature of melt flowing into a runner and comprises a flow monitoring unit and a temperature monitoring unit which are positioned at an inlet of the runner; the dynamic regulation and control module is used for controlling and regulating the heating power of the runner heating module in real time based on the volume flow rate and temperature of the melt and comprises a data processing unit and a control unit, and the data processing unit is used for calculating the heat and the heating power required by the melt passing through the runner according to the volume flow rate and temperature of the melt; the PID temperature control unit is controlled by the control unit to carry out temperature control; the heating power of the hot runner can be dynamically calculated, regulated and controlled by monitoring the melt flow and temperature in hot runner injection molding in real time.

The invention discloses a high-yield laminated mold, and relates to the technical field of molds, the high-yield laminated mold comprises a middle mold base, external mold bases are slidably connected to the two sides of the middle mold base, mold cavities are formed in the two sides of the middle mold base, and hot runners communicating with the mold cavities are installed in the middle mold base; a cavity is formed in the middle mold base, an ejector pin penetrating through the middle mold base and extending into the cavity is slidably connected into the middle mold base, a boss is fixedly installed in the ejector pin, a positioning column used for being connected with a nut in a sleeved mode is fixedly connected to the boss, and the sealing unit comprises a sleeve and a piston plate which are slidably connected into the positioning column. The larger the internal pressure of the first sealing ring is, the tighter the first sealing ring and the inner wall of the nut is, plastic in a molten state is prevented from entering threads of the nut under the pressure, after a material is cooled and shaped, the roller and the first sealing ring can automatically restore to the original shape, the force needed by demolding ejection of a product is reduced, and the ejector pin can eject the product perfectly and conveniently.

The invention discloses a hot runner mold, relates to the technical field of plastic forming molds, and solves the technical problems that a mold core of a traditional hot runner mold is mostly rigidly connected with a mold frame through a bolt and is not easy to replace, mother liquor is easy to remain on the inner wall of a hot runner, a large amount of machine washing materials are needed for washing when materials or colors are replaced, the demolding precision is low, and workpieces are easy to damage. A movable mold assembly is arranged on the right side of the fixed mold assembly, and mold core fixing mechanisms are arranged on the inner side of the fixed mold assembly and the inner side of the movable mold assembly. Through cooperative work of the mechanisms, a mold core fixing structure, a hot runner cleaning mechanism and demolding linkage are optimized, the mold is convenient to disassemble and assemble, and a mold core can be rapidly replaced to adapt to multi-specification production; the hot runner system is uniform in heating, clean, efficient and capable of rapidly switching materials or colors; the demolding is automatic and accurate, and the efficiency is improved; wire harness management is standard, and operation is stable; the structure is stable, the forming quality is guaranteed, the overall cost is reduced, efficient injection molding and demolding circulation are achieved, and the production efficiency is improved.

The invention relates to a needle valve driving device in a hot runner system, and discloses a needle valve driving device arranged on a hot runner support and an assembling method of the needle valve driving device. The device comprises a material collecting bowl, a driving cavity, a piston disc and a needle valve adjusting piece, and a shell of the driving cavity rotates in a resistance mode relative to the material collecting bowl so as to adjust routing of a driving flow path on a hot runner support and adjust the tightness of a valve needle. By arranging an adjusting hole, a first buckling groove, a limiting ring groove, an axial limiting rod and other structures, stable assembly of the device and adjustability of the lifting position of the valve needle and routing of the driving flow path are ensured. In particular, the problems that the position of the needle valve adjusting piece is difficult to adjust and the needle valve adjusting piece moves and displaces under the rotation characteristic of the driving cavity can be solved through the combination of a first positioning hole, a positioning notch, a plugging piece and a tensioning piece. The structural design of the adjustable needle valve driving device in the hot runner system is optimized, the assembling flexibility and reliability are improved, and meanwhile, the height of the valve needle is conveniently and accurately adjusted, and driving flow path wiring is maintained.

According to the heat stabilizing method of the double-color injection mold, a phase change heat storage unit is arranged in the rotary double-color injection mold and embedded in an annular groove formed in the outer wall of a mold cavity on the movable mold side of the double-color injection mold; a phase change heat storage material is packaged in the phase change heat storage unit, and heat insulation layers are arranged on other outer surfaces of the phase change heat storage unit; the melting point of the phase-change heat storage material is lower than the softening point of the plastic material and higher than the demolding temperature of the plastic material; during first injection molding, a molten first material heated to a first high temperature is injected into the lower-layer mold cavity through a hot runner, and is cooled below the first low temperature to be cured; the phase-change heat storage unit absorbs heat of the mold cavity and starts to melt when the temperature rises to a first low temperature, and temperature rise of the mold cavity is delayed; during secondary injection molding, a molten second material heated to a second high temperature is injected into the upper-layer mold cavity; the phase change heat storage unit controls the temperature of the lower-layer mold cavity to be below the third temperature through latent heat absorption, and the first material is prevented from being softened. Temperature fluctuation of the mold can be balanced, and softening of the first injection molding material caused by sudden temperature drop is prevented.

The invention discloses a liquid cooling heat exchanger, a liquid cooling heat exchange assembly and a converter, the liquid cooling converter comprises a heat exchange part, the heat exchange part comprises a first heat exchange module and a second heat exchange module which are arranged side by side front and back, and each module is provided with a plurality of first heat exchange runners and second heat exchange runners which are vertically arranged side by side and are consistent in length; the liquid inlet part is provided with a liquid inlet flow channel protruding and bending upwards and comprises a first liquid inlet section and a second liquid inlet section which are communicated, a liquid inlet is formed in the bottom of the first liquid inlet section and communicated with the first heat exchange end of each first heat exchange flow channel, and the second liquid inlet section is communicated with the first heat exchange end of each second heat exchange flow channel; the bent part of the liquid inlet runner is not lower than the first heat exchange end of the highest heat exchange runner, and the liquid inlet is not higher than the first heat exchange end of the lowest first heat exchange runner; the liquid outlet part is provided with a liquid outlet flow channel which protrudes and bends upwards and comprises a first liquid outlet section and a second liquid outlet section which are communicated, the first liquid outlet section is communicated with the second heat exchange end of each first heat exchange flow channel, and the bottom of the second liquid outlet section is provided with a liquid outlet which is communicated with the second heat exchange end of each second heat exchange flow channel; the bent position of the liquid outlet flow channel is not lower than the second heat exchange end of the highest heat exchange flow channel, and the liquid outlet is not higher than the second heat exchange end of the lowest second heat exchange flow channel. The liquid cooling heat exchanger can keep good heat dissipation performance and operation stability under the gas-containing working condition.

The invention discloses a double-evaporator refrigerating system, refrigerating equipment and a control method thereof.According to the double-evaporator refrigerating system, an exhaust port of a double-cylinder compressor communicates with one port of a four-way valve, and a four-way port of the four-way valve communicates with a condenser assembly and a hot runner inlet of an enthalpy-increasing heat exchanger in sequence; a connecting pipeline communicated with a hot runner outlet of the enthalpy-increasing heat exchanger is divided into three branches. The first branch is sequentially communicated with a cold runner of the enthalpy-increasing heat exchanger and an enthalpy-increasing opening of the double-cylinder compressor through a throttling valve set. The second branch is sequentially communicated with a first evaporator assembly and a two-way port of a four-way valve through a first expansion valve, and a three-way port of the four-way valve is communicated with a first air suction port of the double-cylinder compressor; and the third branch is sequentially communicated with the second evaporator assembly and a second air suction port of the double-cylinder compressor through a second expansion valve. Temperature rise of the second temperature area caused by defrosting of the first temperature area can be avoided, frequent starting and stopping of the system are reduced, heat released in the compression process can be recycled, energy consumption is reduced, and the stability and reliability of the system are improved.

The invention relates to a doorsill beam assembly integrated with a heat exchange runner and a vehicle, and belongs to the technical field of vehicle cooling systems.The doorsill beam assembly comprises a doorsill beam body, and an exhaust channel and a cooling liquid channel are arranged in the doorsill beam body; the cooling liquid channel comprises a first cooling liquid channel adjacent to the exhaust channel and a second cooling liquid channel far away from the exhaust channel; the flow path switching device is arranged at the end part of the doorsill beam body, and the flow path switching device is configured to connect the first cooling liquid channel or the second cooling liquid channel into the cooling liquid loop in a switchable manner or isolate the first cooling liquid channel or the second cooling liquid channel from the cooling liquid loop; and the heat exchange efficiency between gas and liquid in the doorsill beam body is adjusted by selecting the position of the channel through which the cooling liquid flows. According to the heat requirement of the load, liquid is selected to flow through the cooling liquid channel adjacent to the exhaust channel or the cooling liquid channel away from the exhaust channel, the heat exchange efficiency can be adjusted, and the heat using requirements of different working conditions are met.

The invention discloses a double-evaporator refrigerating system, refrigerating equipment and a control method thereof, and the double-evaporator refrigerating system is characterized in that an exhaust port of a double-cylinder compressor is communicated with three pipelines: the first pipeline is sequentially communicated with a condenser assembly and a hot runner of an enthalpy-increasing heat exchanger; a connecting pipeline communicated with a hot runner outlet of the enthalpy-increasing heat exchanger is divided into three branches. The first branch is sequentially communicated with a cold runner of the enthalpy-increasing heat exchanger and an enthalpy-increasing opening of the double-cylinder compressor through a throttling valve set. The second branch is sequentially communicated with the first evaporator assembly and a first air suction port of the double-cylinder compressor through the first expansion valve; the third branch is sequentially communicated with the second evaporator assembly and a second air suction port of the double-cylinder compressor through a second expansion valve; the second pipeline is communicated with the second branch through the first electromagnetic valve; and the third pipeline is communicated with the third branch through the second electromagnetic valve. According to the invention, independent refrigeration of the double-temperature area can be realized, and polling defrosting of the double-temperature area does not influence each other, so that temperature fluctuation in the double-temperature area is reduced.

The invention provides a time schedule controller for injection molding hot runner valve needle starting control and a method thereof. The time schedule controller comprises a first working mode and a second working mode which have the same injection signal starting time, the first delay time length is larger than the second delay time length, and the first starting time length is larger than the second starting time length, or the first starting time length is larger than the second starting time length. The first delay time length is smaller than the second delay time length and the first starting time length is smaller than the second starting time length; wherein in the first working mode and the second working mode, time sequence state control is realized by a state machine, and the state machine comprises a first state, a second state, a third state and a fourth state based on high and low levels of an injection signal, a delay signal and an opening signal. Therefore, the delay time and the starting time of opening the valve needle which are prolonged / shortened proportionally in different working modes are managed through the state machine, and accurate time sequence control over starting of the valve needle of the injection molding machine can be achieved.

The invention provides a processing method and device for a light-emitting carrier with a three-dimensional suspension effect and a vehicle lamp. The processing method for the light-emitting carrier comprises the steps that a skin raw material is added into a skin material injection molding screw, and the skin raw material enters a first hot runner; a core material with bubbles is added into a core material injection molding screw, and the core material with bubbles enters a second hot runner; the valve needle driving device controls the valve needle to seal the second hot runner, the valve needle opens the first hot runner, and the first hot runner injects molten skin raw materials into the mold cavity; and the valve needle driving device controls the valve needle to open the second hot runner, the second hot runner injects a molten core material with bubbles into the mold cavity, and the core material with the bubbles extrudes and forms the skin raw material outwards. The injection molding method solves the problem that an existing injection molding method for injection molding of three-dimensional patterns is inconvenient to use under the condition that the three-dimensional patterns are complex, such as the complex babysbreath type three-dimensional suspension effect.

The utility model discloses an injection mold with a hot runner diversion intercommunication structure, which comprises a static module, a working groove is formed in the bottom of the static module, a heating groove is formed in one side of the inner wall of the working groove, limiting columns are uniformly and fixedly connected to four corners of the top of the static module, and an intercommunication runner is formed in the top of the static module; one side of the heating assembly is fixedly connected with one side of the inner wall of the working groove, and the heating assembly is used for heating the runner; a limiting groove is formed in the surface of the movable module. The utility model relates to the technical field of injection molds. According to the injection mold with the hot runner flow guide intercommunication structure, by means of the arrangement of the pouring assembly, the device can rapidly detach a dovetail plate and an injection pipe from the surface of a track plate through movement of the dovetail plate in a dovetail groove, only a plug board column needs to be inserted into a circular groove, then a baffle is moved, and one side of the baffle is tightly attached to the surface of the plug board column; the operation is convenient.

The utility model relates to a hot runner structure of an injection mold, which comprises two first hot runners arranged at the top of an upper mold, an injection molding cavity is arranged at the bottom of the upper mold, a second hot runner is arranged in the upper mold, the first hot runners are communicated with the second hot runner, and a heating part is arranged on the outer side of the second hot runner. And a discharging opening is formed in the inner top wall of the injection molding cavity and communicates with the second hot runner, side grooves are formed in the two opposite side walls of the discharging opening, the two inner side walls in the width direction of the side grooves are coplanar with the inner side wall of the discharging opening, and heat insulation baffles are slidably connected into the side grooves. The utility model relates to the technical field of injection molding. A worker rotates the two rotating rods to drive the two heat insulation baffles to be attached to each other and shield the discharging opening, so that the second hot runner is separated from the injection molding cavity, and demolding of a plastic workpiece is facilitated; and before the injection molding liquid is added next time, the heating pipe is started to work, so that plastic in the second hot runner is molten.

The invention discloses an injection molding embedded full hot runner sealing ring mold and a using method, and relates to the technical field of sealing ring molds, the injection molding embedded full hot runner sealing ring mold comprises a workbench, a lower mold and an upper mold, the top wall of the lower mold is provided with a plurality of sealing ring mold cavities, the middle of the lower mold is provided with a discharging groove, and a cleaning assembly is arranged in the discharging groove; a discharging disc is arranged on the inner wall of the upper mold, multiple sets of discharging covers are arranged at the bottom of the discharging disc, a storage box is installed at the top of the upper mold and communicates with the discharging disc through a conveying unit, two sets of smoothing plates and scraping push plates are slidably connected into the upper mold, and a smoothing and scraping mechanism for driving the two sets of smoothing plates to move transversely is arranged on the rear side wall of the upper mold. According to the full-hot-runner sealing ring machining equipment, uniform feeding of raw materials for machining sealing rings is achieved, the flattening and scraping mechanism can scrape off the redundant raw materials and push the redundant raw materials into the discharging groove, the cleanliness of the raw materials is guaranteed, the quality of finished injection-molded sealing rings embedded with full hot runners is improved, and the redundant raw materials can be rapidly cleaned through the cleaning assembly.

A sliding block latent type pouring structure of an injection mold comprises a mold cavity compound plate and a mold core compound plate, a hot runner base plate and a mold cavity plate are arranged below the mold cavity compound plate, a mold foot, a lower ejector plate, an upper ejector plate and a mold core plate are arranged on the mold core compound plate, an excess material ejector pin and a product ejector pin are connected to the upper ejector plate, and a mold cavity is formed between the mold core plate and the mold cavity plate. A splitter plate is arranged in the hot runner base plate, a hot nozzle is connected below the splitter plate, a sliding block is arranged on the core plate, a hidden runner sprue is arranged on the upper surface of the sliding block, the hot nozzle penetrates through the cavity plate to be communicated with the hidden runner sprue, the hidden runner sprue is communicated with the mold cavity, a receding groove is formed in the core plate located below the sliding block, and an elastic needle insert is arranged on the bottom face of the sliding block. A spring and a pouring gate elastic needle are arranged in the elastic needle insert, the pouring gate elastic needle is matched with the hidden runner pouring gate, an ejector pin insert is arranged on the bottom surface of the core plate, ejection receding holes are formed in the ejector pin insert and the corresponding core plate, the excess material ejector pin is matched with the ejection receding holes, and the sliding block is driven by an outer sliding structure to slide outwards.

The present application provides a heat exchanger comprising: a frame; the core plate bundle is arranged in the frame and comprises a plurality of stacked heat exchange plates, a heat exchange flow channel is formed between every two adjacent heat exchange plates, and the heat exchange flow channels form at least one heat exchange process in the core plate bundle; the tube box assembly is arranged outside the core body plate bundle and communicates with a port of the heat exchange runner; the grid plate assembly is arranged in the tube box assembly, is located at a port inlet of the heat exchange process and comprises at least two grid plates which are arranged at intervals in the extending direction of the heat exchange process, each grid plate comprises a plurality of plate sheets which are stacked and arranged at intervals, and the stacking directions of the plate sheets of every two adjacent grid plates are staggered; and the plate sheet stacking direction of the grid plate close to the port inlet of the heat exchange flow is perpendicular to the stacking direction of the heat exchange plates of the core body plate bundle. The heat exchanger is simple in structure, convenient to manufacture, good in fluid distribution effect and long in service life, and the abrasion and blockage phenomena are greatly improved.

The utility model discloses a gas water heater. The gas water heater comprises a shell, a water inlet pipe and a water outlet pipe, the combustion heat exchange system is arranged in the shell, the combustion heat exchange system is provided with a flue allowing airflow to pass through and a heat exchange flow channel allowing the airflow to pass through, the water inlet end of the heat exchange flow channel is connected with a water inlet pipe, and the water outlet end of the heat exchange flow channel is connected with a water outlet pipe; the fan is arranged in the shell, and the fan is communicated with the flue and used for driving airflow to flow along the flue; the bypass valve is arranged in the shell and is close to the fan, the bypass valve comprises a valve body and a control part arranged on the valve body, the valve body is provided with a bypass flow channel for communicating the water inlet pipe with the water outlet pipe, and the control part is used for controlling the water passing flow of the bypass flow channel. According to the technical scheme, the temperature rise of a control part of the bypass valve can be reduced, and the service life of the bypass valve is prolonged.