1149 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 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 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 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 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 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 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.

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 provides a turbine injection mold with a full-circumference sliding block, which comprises a hot runner plate, a fixed mold plate, a movable mold plate and a movable mold fixing seat, the movable mold plate is arranged at the bottom of the hot runner plate and is arranged on the movable mold fixing seat, a sliding block driving assembly is arranged on the fixed mold plate, a sliding block assembly and a metal insert are arranged on the movable mold plate, and the metal insert is arranged on the fixed mold plate. The metal insert is movably arranged in the center of the movable mold plate, the sliding block assembly comprises a plurality of sliding block bodies and guide blocks, the sliding block bodies are connected with the guide blocks in a sliding mode, the guide blocks are arranged on the movable mold plate in a radial mode with the metal insert as the center, and the sliding block driving assembly can drive the sliding block bodies to move on the guide blocks. The technical problem that the turbine blades are small and dense in spacing and cannot be realized is solved, and the effect of integrally designing the turbine structure is achieved.

The utility model relates to a melting assembly, a nozzle and a 3D printer, the heating efficiency of consumables can be improved, the melting assembly comprises a heating piece, the heating piece is provided with a first heating runner and a second heating runner, the first heating runner is located on the outer side of the second heating runner, the second heating runner comprises a conical cavity with the inner diameter gradually reduced, and the conical cavity is located in the nozzle. A channel area is formed in the cavity wall of the conical cavity, and the second heating flow channel communicates with the first heating flow channel through the channel area.

The present invention discloses an anti-condensation hot runner injection mold, comprising a swirl tube, a heating ring seat and a flow-aiding tube. A swirl channel and a filling port are provided inside the swirl tube, and the liquid flow is guided by a rotating moving guide bucket to ensure that the molten plastic is evenly heated during the flow process and to prevent the occurrence of condensation. A heating coil is provided in the heating ring seat, and the temperature is controlled by a constant temperature control module to ensure the temperature stability of the hot runner. The flow-aiding tube further heats the liquid flow through a plurality of axially arranged electric heating rings, thereby improving the temperature uniformity of the liquid flow and avoiding local condensation. By adopting a precise temperature control system, innovative flow control technology and hot runner design, the structural design of the swirl channel and the moving guide bucket of the present invention increases the flow efficiency of the liquid flow, and through the diversion and confluence mechanism of the Tesla valve structure, the flow performance of the liquid flow is improved, the molding efficiency is effectively improved, the waste is reduced, and the energy consumption in the injection molding process is optimized.

The invention discloses a gas-liquid coplanar refrigerant direct cooling plate and a preparation method. The gas-liquid coplanar refrigerant direct cooling plate specifically comprises a main body structure formed by overlapping and welding an aluminum alloy upper shell plate and a lower shell plate. A plurality of parallel linear grooves are machined in the inner surface of the upper shell plate, and the upper shell plate is combined with the plane of the lower shell plate to form a multi-channel flow channel structure composed of a plurality of independent heat exchange flow channels. The bottom surface or the top surface of the inner surface of the heat exchange runner is a heat exchange surface; a liquid absorption core layer is compounded on at least the heat exchange surface of the flow channel, and the liquid absorption core layer realizes capillary liquid absorption and liquid storage functions by using a material with capillary liquid absorption and storage functions. The refrigerant direct cooling plate can effectively improve the liquid absorption efficiency and the heat exchange performance of the refrigerant, meanwhile, the flow resistance is reduced, and the stability of the whole system is improved.

The utility model belongs to the technical field of injection molds, and discloses a valve needle, a hot runner system and an injection mold, the valve needle comprises an outer valve needle and an inner valve needle, the lower end of the outer valve needle is provided with a first discharge port, and the inner valve needle is slidably arranged in the outer valve needle along the vertical direction to close or open the first discharge port; the outer valve needle comprises a discharging part, a first material sealing part and a first material conveying part which are sequentially communicated from top to bottom, a discharging gap is formed between the upper portion of the inner valve needle and the discharging part, the upper portion of the inner valve needle can be in sealing fit with the first material sealing part, a first material supply runner is formed between the lower portion of the inner valve needle and the outer valve needle, and a feeding hole is formed in the first material conveying part; the first feeding runner is communicated with the feeding hole; a discharging groove is formed in the inner wall of the discharging part in the circumferential direction of the discharging part, a through discharging hole is formed in the side, away from the discharging gap, of the discharging groove and communicates with the discharging gap through the discharging groove, and in the relative movement process of the inner valve needle and the outer valve needle, waste is gathered into the discharging groove and automatically discharged through the discharging hole.

The utility model discloses a box body assembly and an electric device, the box body assembly comprises a box body, the inner part of the box body is provided with an accommodating cavity, and the box wall of the box body is provided with at least two through holes; the heat exchange part is contained in the containing cavity, a heat exchange flow channel used for circulating a heat exchange medium is formed in the heat exchange part, the heat exchange part comprises at least two pipelines communicating with the heat exchange flow channel, the pipelines are hard pipes, and each pipeline corresponds to the corresponding adjacent through hole and is internally sleeved with the corresponding through hole; the box body is provided with a sealing structure used for sealing between the through hole and the pipeline. According to the box body assembly, the heat exchange piece has high flow path sealing performance, the box body has high protection performance, meanwhile, the cost can be reduced, and the reliability of the box body assembly can be improved.

The invention discloses a high-temperature powder heat exchanger, and relates to the technical field of heat exchangers. A drainage pipe set is installed on a second stock bin mechanism, heat exchange flow channels are installed between heat exchange material pipes in a sleeving mode, the heat exchange flow channels arranged up and down are connected in series, the drainage pipe set communicates with the corresponding heat exchange flow channels, and discharging channels communicate with the corresponding heat exchange material pipes. High-temperature powder falling into the material guiding channels enters the corresponding heat exchange material pipes, a flow inlet pipeline is installed at a top opening of the heat exchange flow channel on the upper portion, the bottom of the water storage tank communicates with a self-flowing heat exchange water pipe connected with the flow inlet pipeline, and a heat exchange air pipe is installed on the self-flowing heat exchange water pipe. Water in the heat exchange runners is pushed by airflow to flow, a water film is attached to the inner wall of the heat exchange cavity flowing through the airflow, evaporation of the water film is achieved under the action of the airflow, and therefore evaporation heat exchange of all the heat exchange material pipes is achieved, and compared with a traditional continuous ventilation or circulating water heat exchange mode, the energy consumption and the water resource requirement are reduced.

The invention relates to a needle valve driving device in a hot runner system, and discloses a needle valve driving device with an adjustable hot runner 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.

The utility model relates to the technical field of hot nozzles of hot runners, in particular to a multi-head needle valve hot nozzle of a hot runner, which comprises a multi-head needle valve hot nozzle body and a plurality of movable valve cores, a support table and a fixed table are arranged at the top of the multi-head needle valve hot nozzle body, the fixed table is positioned above the support table, and the movable valve cores are arranged on the support table. A plurality of driving rods are slidably connected to the supporting table, driving shafts are fixedly connected to the bottoms of the driving rods, the bottoms of the driving shafts are fixedly connected with the valve element and used for driving the valve element to move, magnetic rings are fixedly connected to the tops of the driving rods, and a supporting circular ring capable of moving up and down is arranged at the top of the supporting table; by arranging the motor and the micro electric telescopic rod, the lifting circular ring can be driven by the motor to move up and down, the lifting circular ring drives all the valve elements to move synchronously, the micro electric telescopic rod can be independently controlled, and the movement of each valve element is independently controlled by electrifying the electromagnet and adsorbing the magnetic ring.

The invention discloses a thin-wall acoustic part injection molding device based on a hot runner, and belongs to the technical field of injection molds. Comprising an injection mold, a fixed mold mechanism, a discharging mechanism and a runner assembly, linkage is formed between a hot runner system of the runner assembly and inclined structures of an injection mold, a fixed mold mechanism and a discharging mechanism, on-off injection molding heads achieve on-demand on-off of molten materials, cold material residues are avoided, a spherical structure in the middle of a flow guide pipe head optimizes a molten material flowing path, a driving part accurately controls a ball core valve head to rotate, it is ensured that on-off of the molten materials is switched in time, and the service life of the molten materials is prolonged. The melt entering the cavity is always in a proper temperature state; and meanwhile, the inclined structure assists the melt in flowing in the inclined direction under the action of gravity, the filling resistance of the tail end of the thin-wall cavity is greatly reduced, it is guaranteed that the melt is rapidly and evenly filled in the cavity, the part is guided to directionally slide down after demolding, follow-up collection is facilitated, and comprehensive optimization of the filling quality, the production efficiency and the energy consumption cost is achieved.

The invention belongs to the technical field of special-shaped plug connectors, and discloses an injection molding method of a special-shaped plug connector, which comprises the following steps: selecting plastic raw materials of the special-shaped plug connector: the plastic raw materials comprise a base material, a reinforcing material, a plasticizer and a light stabilizer, the base material is polystyrene, the reinforcing material is glass fiber and carbon fiber, the plasticizer is a cycloolefin plasticizer, and the light stabilizer is a light stabilizer; the injection molding machine is filled with the plastic raw materials for melting, and the mold is designed to be the round water gap and arranged at the flowing position of the plastic through the cooperation of the round water gap, the exhaust channel, the pneumatic core-pulling mechanism and the demolding inclination, so that the appearance of a molded product is prevented from being influenced; the pneumatic core-pulling mechanism comprises an air cylinder, a piston, an air pipe and a valve, the temperature of cooling water of the injection mold is 20-30 DEG C, a pouring gate is a hot runner pouring gate, accumulation of cold materials can be reduced, waste can be reduced, the production efficiency is improved, the demolding inclination is 1-3 degrees, and mold clamping and damage of products are avoided.

The utility model relates to the technical field of injection molds, and in particular to a high-precision flow control injection mold, comprising a mold body, and also comprising an injection port arranged on the mold body, a diverter plate arranged in the mold body, a hot runner cavity arranged in the diverter plate, a hot nozzle arranged below the diverter plate, and a flow control component for controlling the discharge flow of the hot nozzle; the utility model arranges a flow control component, and a flow control plate is arranged in the hot nozzle. When it is necessary to control the flow of hot-melt material ejected from the hot nozzle, a rotating drive component drives a rotating shaft to rotate and drives a flow control disk to rotate in the flow control cavity, and a plurality of different flow control holes are connected to the hot-melt through hole, so as to accurately control the flow of hot-melt material passing through the hot-melt outlet channel, and different apertures of flow control holes can be set according to needs to adapt to the production of different injection molded products, and can effectively reduce the uneven filling of plastic products after injection molding.

The invention relates to the technical field of commercial spaceflight, in particular to a self-repairing liquid metal heat pipe for commercial spaceflight, which comprises a polyether-ether-ketone composite pipe, gallium bismuth zinc liquid gold, a micro-nano repairing film, a main hot runner, a pressure detector, a standby hot runner and an emergency plugging valve, and the main hot runner is an axial through channel in the polyether-ether-ketone composite pipe, and the standby hot runners are annularly and circumferentially arrayed along the inner wall of the main hot runner. Compared with heat conduction in the prior art, medium leakage is stopped through cooperative plugging in a damaged scene, so that the heat conduction efficiency is improved, and the service life of the heat exchanger is prolonged. And meanwhile, the detector is in signal linkage with the plugging valve, a heat transfer loop is rapidly switched in the case of serious damage, the continuous and stable thermal control function is achieved, and therefore the on-orbit operation life of a spacecraft is further prolonged.