456 results about "Hot runner" patented technology

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 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 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.

The invention relates to a chair armrest side plate injection mold hot runner glue feeding control method and a mold thereof, and relates to the technical field of injection molds, and the method comprises the following steps: in response to a mold closing completion signal, collecting product information, cavity information and a glue feeding position; according to the cavity information, determining a flow velocity threshold value, a glue feeding time length and a glue feeding component corresponding to a glue feeding position; determining the glue inlet flow rate by combining product information, glue inlet component and glue inlet duration; defining a glue inlet position corresponding to the glue inlet flow velocity greater than the flow velocity threshold as a standard-exceeding position, and defining a glue inlet position adjacent to the standard-exceeding position as an adjacent position; obtaining the adjacent relation of the standard exceeding positions; the glue inlet flow velocity is corrected based on the adjacent relation; and the execution unit is controlled to operate in combination with the corrected glue inlet flow speed and the corrected glue inlet duration. The method has the effect of avoiding the quality defects of obvious weld marks, local sink marks and the like of products.

A hot runner injection nozzle system for use in co-injection molding with a built-in obturator valve (7) in a nozzle tip assembly (16) attached to a nozzle body (1) and permits several different directions of gating. It allows for independent flow of each melt stream having their confluence at the very last possible position avoiding mutual contamination with the built-in obturator (7). The nozzle tip assembly comprises several channels providing for the flow of multiple polymeric melt streams and an obturator that serves as a check valve. Selective flow of each stream is fully controlled by individual injection units at the source providing the feed for each melt stream. The invention allows for simple fabrication, maintenance, reduces mutual contamination and allows for a more compact hot runner manifold and tool design. It allows for an optional needle-valve when the product requires a better injection point finish.

An injection molding system is disclosed. The injection molding system includes: a mold; a hot runner including: a manifold; one or more injection nozzles coupled to the manifold; a plurality of heaters in thermal contact with the manifold and the one or more injection nozzles, the heaters being arranged into one or more defined heating zones within the hot runner; and at least one temperature sensor associated with each heating zone, and a system controller coupled to the plurality of heaters, the system controller being configured to: for each heating zone: determine a setpoint temperature associated with the heating zone; obtain, via a temperature sensor, measurement of a current local temperature of the heating zone; determine a control gain value associated with the heating zone; and compute a predicted heating time for the heating zone based on the setpoint temperature, the current local temperature, and the control gain value, determine a heating schedule for the hot runner based on the predicted heating times for the heating zones; and operate the plurality of heaters in accordance with the heating schedule.

A portable information handling system housing portion is manufactured by a process that injects a magnesium aluminum alloy (Mg—Al) from a hot runner having plural outtakes into a mold having a spree at each of the plural outlets. In one example embodiment a housing lid portion is injection molded at a midpoint on opposing sides of a longest side of a rectangular shape. In another example embodiment a housing cover portion is inject molded from six sprues placed around a perimeter of a keyboard location having openings through which keys of the keyboard extend.

The utility model belongs to the technical field of splicing type hot runner assembly, and particularly relates to a splicing type hot runner assembly tool which comprises a machining table. A rotating mechanism is arranged on the top side of the machining table, a fixing mechanism is arranged on the top side of the rotating mechanism, an adjusting mechanism is arranged on the inner side of the machining table, the rotating mechanism comprises a moving table, a rotating table is rotationally installed on the top side of the moving table, positioning holes are symmetrically formed in the top side of the moving table, and a sliding groove is formed in the bottom side of the rotating table. First springs are fixedly connected between the clamping blocks and one ends of the inner sides of the sliding grooves, sliding rods are slidably inserted into the inner sides of the fixing plates in a penetrating mode, second springs are fixed between the clamping plates and the fixing plates, the rotating table is pushed to rotate around the center of the moving table, and when the clamping blocks move to the top sides of the positioning holes, the first springs push the clamping blocks to be buckled to the inner sides of the positioning holes. And at the moment, the other side of the splicing type hot runner can be assembled, and the problem that an existing assembling tool is low in assembling efficiency is solved.

This invention discloses a hot runner system and a stacked mold. The hot runner system includes a first hot runner assembly and a second hot runner assembly. The first hot runner assembly is disposed in the fixed mold, and its runner is connected to the gate of the second cavity. The second hot runner assembly is disposed in the intermediate mold, and its runner is connected to the gate of the first cavity. When the moving mold, intermediate mold, and fixed mold of the stacked mold are closed, the runners of the first and second hot runner assemblies are connected to form a continuous runner structure, and the molten injection material enters the runner of the second hot runner assembly through the runner of the first hot runner assembly. This invention, by optimizing the arrangement and feeding path of the hot runner system, maintains the high output advantage of the stacked mold while effectively improving the balance, stability, and reliability of the injection molding process.

The utility model relates to the technical field of hot runner color changing nozzles, in particular to a hot runner color changing nozzle convenient to quickly disassemble and assemble, which comprises a mounting disc, a nozzle assembly is arranged on the side surface of the mounting disc, a flow guide assembly is arranged at the top of the mounting disc, and a mounting ring, a nozzle body, a sealing clamping groove, a sealing strip, a fixing rod and a mounting through hole are matched for use. The mounting ring and the nozzle body are connected in an inserted mode through the fixing rod, so that the nozzle body is more convenient to mount and dismount, the sealing strip is embedded into the sealing clamping groove, leakage of a hot melting material is effectively prevented, meanwhile, the situation that the top of the nozzle body is loosened or insufficient in sealing in the using process is avoided, the mounting through hole communicates with the flow dividing pipe, and the sealing effect is good. And the adjusting rod can be driven to rotate by rotating the adjusting knob, then opening and closing of the ball valve body are controlled, accurate adjustment of the flow of the hot melting material in the flow dividing pipe is achieved, and the color changing efficiency and the injection precision of the color changing nozzle are effectively improved.

The invention belongs to the technical field of hot runner systems, and relates to a heater connecting assembly of a hot runner system and a heater electric connecting system. Comprising an electric connecting piece made of metal materials, the electric connecting piece comprises a first connecting terminal and a second connecting terminal, the first connecting terminal is used for being connected with a cable, the second connecting terminal is used for being connected with a heater pin, and an included angle alpha is formed between the axis of the first connecting terminal and the axis of the second connecting terminal. Alpha is larger than 0 degree and smaller than 180 degrees, so that the installation direction of the cable and the installation direction of the heater pin of the second connecting terminal are located in the angle interval, and the electric connecting piece is provided with a high-temperature-resistant insulating shell which is at least partially covered. Compared with the prior art, the structure has the advantages that the structure is compact, the spatial layout and the anti-interference capability are optimized, and key support is provided for designing a more compact hot runner system.

The utility model relates to the technical field of hot runner molds, in particular to an ejection mechanism for a hot runner mold, which mainly comprises a supporting bottom plate, a lower mold block arranged at the top end of the supporting bottom plate, an upper mold block arranged at the top end of the lower mold block, a connecting top plate arranged at the top end of the upper mold block, and an ejection adjusting component arranged at the top end of the lower mold block. The ejection adjusting assembly comprises a telescopic ejector rod, an elastic connecting piece is arranged on the inner side of the telescopic ejector rod, an adjusting sliding block is arranged at the top end of the telescopic ejector rod, and a fool-proof ejector block is arranged on the inner side of the adjusting sliding block. According to the ejection mechanism for the hot runner mold, the lower mold block and the upper mold block are separated through movement of the telescopic ejection rod, buffering connection is carried out through the elastic connecting piece in the moving process, the protection performance is improved, the adjusting sliding block and the positioning block on the inner side are clamped and positioned through the fool-proof ejection block, and the safety is improved. The supporting pressure of the telescopic ejector rod can be shared in the using process, abrasion of the telescopic ejector rod is reduced, and the using efficiency of the mold is ensured.

The utility model relates to a cigarette holder manufacturing mould of electronic cigarette, including upper die assembly, upper die assembly includes upper seat board and the upper gasket that connects in the lower extreme of upper seat board, is provided with the feed port on the upper seat board, upper die assembly still includes the baffle, is used for the heating unit of baffle heating and is used for the power socket of connecting heating unit, baffle can dismantle formula hot nozzle, baffle has the shunt channel, shunt channel has a shunt feed port and at least two shunt discharge port, the upper and lower end of hot nozzle is respectively communicated feed port and shunt feed port, and each shunt discharge port is installed with one injection nozzle that is communicated shunt channel, the recessed installation cavity of upper gasket, the inner bottom wall of installation cavity is equipped with at least two through -holes for corresponding injection nozzle to pass through, baffle and heating unit two common detachable installation in installation cavity, and injection nozzle extends out of upper gasket through corresponding through -hole, its convenient replacement and maintenance of hot nozzle, also realize hot runner and convenient replacement and maintenance of hot runner, and the cost is lower.

An injection nozzle is arranged in the middle of the top side of a splitter plate and fixedly connected with an input port of the top side of the splitter plate, hot nozzles are symmetrically arranged at the bottom of the splitter plate and fixedly connected with an output port of the splitter plate, and mounting sleeves are connected to the outer walls of the hot nozzles in a sleeved mode. The inside of the hot nozzle is sequentially heated from top to bottom, the efficiency of softening blocking materials in the hot nozzle is improved, the blocking materials blocking the inside of a spraying hole in the bottom end of the hot nozzle can be automatically adhered and pulled out along with soft replacement of the installation sleeve and a descending sealing ring, and therefore the blocking materials in the spraying hole in the bottom end of the hot nozzle can be automatically heated. The annular heat conduction pipe can conduct auxiliary heating on the space below the hot nozzle, the situation that when the softened blocking material is pulled out, the blocking material is broken and taken out again due to secondary solidification caused by the fact that the blocking material makes contact with the external low-temperature environment is avoided, and discharging of the blocking material is smoother and more stable.

The present application relates to injection mold technical field, specifically to a kind of double-channel hot runner forming mold, including the mold assembly of being able to mutually clamping, mold assembly and being located between mold assembly and demolding mechanism to product is demolded, mold assembly and mold assembly are slidingly fitted, mold plate assembly includes hot runner plate and the upper fixed plate of abutment in hot runner plate upper side and the upper forming mold plate of abututment in hot runner plate lower side, hot runner plate is equipped with valve needle hot runner, valve needle hot runner is equipped with hot runner shunt bifurcated pipe, mold assembly includes mold plate and the push plate of being equipped with in mold plate upper and the support block of being equipped with in mold plate below, the bottom surface of support block is equipped with bottom plate.The mold of the present application has no ejection, no runner, no gate material, occupies small space, can use smaller machine platform to make the cavity number of mold double, and realize hot runner valve needle and runner separation, facilitate to realize fast heat exchange, and pouring is more uniform.

This utility model provides a cage injection mold with a rapid preheating structure, comprising: a moving mold at the bottom of a fixed mold; a sprue sleeve passing through the center of the fixed mold on the side away from the moving mold; a mold core assembly positioned at the center of the fixed mold and the moving mold on the side close to each other; a hot runner heating module sleeved on the bottom of the sprue sleeve at the top; and a heating rod heating module passing through the center of the mold core assembly; and several junction boxes bolted to the side walls of the fixed mold and the moving mold. In the mold preheating process, based on heat conduction heating using a mold temperature controller, a hot runner heating module and a heating rod heating module are installed at the core of the mold. These are connected to a power plug via junction boxes to achieve electric heating at the core, which assists in rapid mold preheating and greatly improves processing efficiency. During injection, the temperature of the liquid plastic does not drop when it enters the molding cavity composed of the fixed mold core and the moving mold core, improving the quality of the injection molded parts. Furthermore, the injection runner can be diverted to allow one mold to process multiple injection molded parts simultaneously, improving production efficiency.

The application provides a vehicle electric heating tube casting heater, which comprises a heater main body, a heater base, an upper cover plate and a lower cover plate, the outer part of the upper cover plate and the lower cover plate are provided with outer cover plates; the heater main body is provided with a first inlet and outlet and a second inlet and outlet, and the heater main body is internally provided with a heating assembly; the heating assembly is composed of a heating element and fins, the fins are arranged on the upper and lower end faces of the heating element, the gap between adjacent fins forms a heat exchange flow channel, the two sides of the fins are respectively provided with an inlet water flow channel and an outlet water flow channel, the inlet water flow channel and the outlet water flow channel are connected through the heat exchange flow channel, and the inlet water flow channel and the outlet water flow channel are both provided with a gradually narrowed channel structure. The application has the beneficial effects that: the application adopts an immersed double-sided heating design, fully utilizes the heat dissipation area, and has high heating efficiency; meanwhile, the flow channel structure combining the inlet water flow channel, the outlet water flow channel and the heat exchange flow channel, and the intermittent and winding fin structure can increase the heat exchange area and the disturbed water flow, and increase the heat exchange effect.

The present application belongs to the technical field of injection molding, and discloses a non-contact valve needle glue feeding runner structure, which comprises a heating seat, a glue injection hole, a glue injection cavity and a valve needle, wherein the glue injection hole and the glue injection cavity are arranged in the heating seat, the glue injection hole is communicated with the glue injection cavity, a runner separator is arranged in the heating seat, the runner separator is at least partially arranged in the glue injection cavity, at least one runner for the flow of hot molten glue is formed between the runner separator and the glue injection cavity, a valve needle hole is arranged in the runner separator to separate the glue injection cavity and the valve needle, and the heating seat is at least partially tightly combined with the runner separator to enable the heating seat to perform heat transfer on the runner separator. The present application solves the problem of the insufficient improvement of the hot runner structure for the PET plastic injection molding products with a temperature of 280 DEG C or above in the prior art, which leads to the stress line when the valve needle is sealed and contacts the molten glue of the hot runner, and the high waste rate.

The present application belongs to hot runner technical field, especially relate to nozzle tip heating structure and its hot nozzle, hot runner system. A nozzle tip heating structure, including nozzle tip body, the nozzle tip body is equipped with nozzle tip runner, the nozzle tip body outer wall surface is equipped with nozzle tip heating wire outlet slot I.

This invention relates to the field of injection mold technology, and particularly to a hot runner linked hot nozzle, comprising a hot runner plate, a support cylinder, a hot nozzle, a movable contact mechanism, a heat conduction mechanism, and a limiting and fixing mechanism. This invention solves the following problems existing in hot runner hot nozzles: the rigid contact between the hot nozzle and the gate is easily subjected to impact and wear during the opening and closing of the moving and fixed molds, leading to overflow when injecting molten plastic; after injection, a small amount of molten plastic remains between the injection end of the hot nozzle and the gate, easily causing gate blockage, and injection into the mold cavity can lead to product defects; this invention can control the contact between the hot nozzle and the gate to only occur during molten plastic injection, preventing rigid contact between the hot nozzle and the gate, effectively avoiding overflow caused by damage to the contact surface of the hot nozzle and the gate; this invention can conduct the heat of the molten plastic to the inside of the hot nozzle and the molten plastic between the bottom of the hot nozzle and the gate for heat preservation, preventing it from cooling and solidifying.

The present application relates to a kind of chair armrest side plate injection mold hot runner glue feeding control method and its mold, it relates to injection mold technical field, it includes: in response to the mold completion signal, product information, cavity information and glue feeding position are collected;According to cavity information, determine flow rate threshold, glue feeding duration and the glue feeding component corresponding to glue feeding position;Determine glue feeding flow rate by combining product information, glue feeding component and glue feeding duration;The glue feeding position corresponding to the glue feeding flow rate greater than flow rate threshold is defined as exceeding position, and the glue feeding position adjacent to exceeding position is defined as adjacent position;Adjacent relationship of exceeding position is obtained;Based on adjacent relationship, glue feeding flow rate is corrected;The operating unit is controlled to run by combining corrected glue feeding flow rate and glue feeding duration.The present application has the effect of avoiding product to appear weld mark obvious, local shrinkage mark and other quality defects.

This invention discloses an injection mold and injection molding equipment, relating to the field of mold equipment. The injection mold includes a first mold assembly, a second mold assembly, and a third mold assembly. The first mold assembly includes a first mold core, the second mold assembly includes a second mold core and a third mold core, and the third mold assembly includes a fourth mold core. The first and second mold cores, when the mold is closed, enclose a first cavity for injection molding; the third and fourth mold cores, when the mold is closed, enclose a second cavity for injection molding. The first mold assembly has a first hot runner system, the runners of which are connected to the gate of the first cavity. The second mold assembly has a second hot runner system, the runners of which are connected to the gate of the second cavity. This invention, while maintaining the high-volume advantage of stacked molds, effectively optimizes the arrangement of the hot runner system, reduces the structural burden on the mold, and improves the balance, stability, and reliability of the injection molding process.

This utility model relates to a hydraulic cylinder control system with adjustable displacement speed and intermediate stop capability. It includes a cylinder assembly with a valve group and a controller connected to it. The cylinder assembly includes a cylinder body, a piston rod, and a rear-end rod. A displacement sensor, connected to the rear-end rod via a bracket, is located on the cylinder body side corresponding to the rear-end rod. The displacement sensor and the rear-end rod are connected via a connecting rod. A valve needle is connected to the front end of the piston rod. The displacement sensor obtains the cylinder body's displacement data. The controller adjusts the flow rate of the proportional directional valve and the valve core position based on the cylinder body displacement data to drive the cylinder body to change its displacement speed and achieve intermediate stop of the cylinder movement at any desired position. This allows for differentiated control of the opening and closing of the injection port by valves at different points within the same hot runner system, resulting in smoother injection and venting, and effectively improving the quality of injection molded products.

The utility model relates to the technical field of hot runners, and particularly discloses a needle valve type air cylinder structure with a cooling function. The cylinder body, the cylinder cover and the base form an inner cavity of the cylinder, the piston is arranged in the cylinder and divides the inner cavity into an upper cavity and a lower cavity, the lower portion of the piston is connected with a needle valve which is coaxially arranged, the lower end of the needle valve penetrates out of the base and extends out of the cylinder, an upper air channel and a lower air channel are arranged on the outer side of the cylinder, the upper air channel is communicated with the upper cavity, and the lower air channel is communicated with the lower cavity. A mounting cavity for mounting and fixing the needle valve and a mounting piece are arranged in the piston, a ventilation gap is reserved between the mounting cavity and the needle valve, the piston is provided with a first cooling air channel for communicating the lower cavity with the mounting cavity, and the base is provided with a second cooling air channel for communicating the mounting cavity with the lower air channel. The air cylinder structure can reduce the temperature of the needle valve, reduce the expansion amount of the needle valve and reduce the risk of abrasion of an inner hole of the valve sleeve.

The utility model provides a driving cylinder and a hot runner system. The driving cylinder comprises a cylinder body and a piston, a cavity is formed in the cylinder body, the piston is arranged in the cavity and reciprocates in the cavity, and the piston is provided with a fixing hole used for fixing a valve needle; in the moving direction of the piston, the valve needle can be fixed relative to the piston through the fixing hole, so that the piston can drive the valve needle to do reciprocating motion; the fixing hole is a long-strip-shaped hole so that the position of the valve needle fixed to the piston can be adjusted in the direction perpendicular to the movement direction of the piston. According to the driving cylinder, the fixing hole used for fixing and enabling the valve needle to penetrate through is in the long strip shape, the position of the valve needle can be adjusted, and the application range is wide.

The utility model discloses a hot nozzle assembly and a hot runner system comprising the same. The hot nozzle assembly comprises a hot nozzle body and a nozzle head part which are fixedly connected with each other, the interior of the hot nozzle body is hollow and is provided with a first runner extending longitudinally, the interior of the nozzle head part is hollow and is provided with a second runner extending longitudinally, and the first runner is communicated with the second runner; the nozzle head part comprises a blocking part, the blocking part is located in the second flow channel and divides the second flow channel into an upper flow channel and a lower flow channel, and the upper flow channel is communicated with the lower flow channel. When the molten material flows from the second runner to the first runner, the molten material is blocked by the blocking part, so that the cross section of the molten material changes and is suddenly reduced. And therefore, the condition of wire drawing of the material handle is prevented. Moreover, a nozzle tip structure in a common structure is omitted, so that the cost is further reduced.

The present application belongs to the technical field of mould, and particularly relates to an inner-extraction inclined pin mould structure, which solves the problem of difficult product extraction in the prior art, and comprises a female mould plate and a male mould plate. The top of the female mould plate is sequentially fixed with a hot runner plate, an upper fixed plate and a heat insulation plate through hexagonal bolts. The bottom of the female mould plate and the top of the male mould plate are respectively fixedly installed with a female mould core and a male mould core. The bottom of the male mould core is fixedly provided with two mould feet. The bottoms of the two mould feet are jointly fixed with a lower fixed plate through screws. Through the setting of the supporting plate and the inclined pin, the supporting plate first moves to drive the inclined pin to exit the undercut. The product remains on the male mould core and does not move with the inclined pin. After the movement of one end, the supporting plate stops moving under the action of the equal-height screw. Then, the product is ejected by the action of the main part of the locking machine and the locking machine shifting block, the male mould plate and the female mould plate are opened, the product is then ejected, the inclined pin and the ejector pin are separated, the product is conveniently extracted, and the product is not damaged due to the inclined pin.

This utility model discloses an anti-clogging valve needle hot runner mold, relating to the technical field of valve needle hot runner molds. The anti-clogging valve needle hot runner mold includes a base plate, with a lower mold fixedly connected to the upper end of the base plate and a guide post fixedly connected to the upper end of the base plate. A top plate is slidably connected to the guide post, and a hot runner plate is fixedly connected to the lower end of the top plate. An upper mold is fixedly connected to the lower end of the hot runner plate. A positioning block is installed in the hot runner plate, and a hot runner body is formed inside the positioning block. A valve needle is inserted into the hot runner body, with a cylinder fixedly connected to the upper end of the valve needle. The lower end of the positioning block is connected to a discharge nozzle via an easily detachable mechanism, and a heating element is provided at the outer end of the positioning block. The heating element at the outer end of the positioning block heats the positioning block and the hot runner body, keeping the injection plastic inside the hot runner body in a molten state and preventing residual material from cooling and solidifying, thus avoiding blockage. The discharge nozzle is connected to the positioning block via an easily detachable mechanism, facilitating easy and quick cleaning of the inside of the hot runner body and maintenance of the heating element.

The invention relates to the technical field of car lamp injection molding machining, in particular to a multi-cavity hot runner mold for car lamp injection molding machining and a forming technology.The multi-cavity hot runner mold for car lamp injection molding machining comprises a lower fixed mold, an upper movable mold, a base and a supporting table; the lampshade cavity is formed in the surface of the lower fixed mold; the hot runner unit is formed in the upper movable mold and corresponds to the lampshade cavity; the independent temperature control area is arranged outside the hot runner unit; the injection molding opening is formed in the surface of the upper movable mold; the hot runner unit comprises an injection molding channel arranged below the injection molding opening, four main runners arranged below the injection molding channel, eight branch runners arranged at the end parts of the four main runners and nozzle parts arranged at the end parts of the branch runners; a high-balance multi-cavity total hot runner system is formed through the multiple cavities and the hot runner, and the defects of chromatic aberration, flash, shrinkage and the like are effectively eliminated by combining the multiple independent temperature control areas divided by the hot runner system.