138 results about "Plastic injection molding" patented technology

The invention relates to the technical field of plastic injection molding, in particular to a multi-point glue feeding method for a thick-wall light-emitting body of an automobile tail lamp and an injection molding mold, and the method comprises the steps that product parameters are obtained in response to a detection signal, and a correlation coefficient, a guide angle and a reference track are determined according to the product parameters; injecting the magnetic ball and the detection liquid from a pouring gate position at a guide angle based on a track control method, and collecting a moving track; when the moving track does not coincide with the reference track, an adjusting coefficient is determined according to the moving track and the reference track, and the guide angle is corrected; when the moving track coincides with the reference track, defining the guide angle as a target angle; the injection molding angle is determined according to the target angle and the correlation coefficient, molten plastic is injected from the sprue position, and then a connection image of the product is collected; and the injection molding angle is corrected according to the existence condition of the cross color feature in the connection image. The device has the effect of avoiding color crossing of two materials in a product.

The unmanned aerial vehicle comprises the vehicle arm structure, the vehicle arm structure comprises a carbon tube, a hardware sleeve die piece, a first injection molding piece and a second injection molding piece, the carbon tube is combined with the hardware sleeve die piece and the injection molding piece, and the characteristics of light weight and high strength of the carbon tube are utilized; due to the connection stability and the machining flexibility of the hardware sleeve die piece and the injection molding piece, the overall strength and the stability of the arm structure are improved; compared with a pure plastic injection molding process, the requirements for structural design and a mold are relatively low, and the method is suitable for an arm with a certain length; compared with a pure hardware machining process, the cost is lower, and the machining efficiency is higher; and compared with a gluing process, the connection is more stable, and the risk is smaller.

The utility model discloses an automobile plastic part injection molding excess material cutting device which comprises a supporting base, a transverse moving assembly is arranged at the upper end of the supporting base, a radian adjusting assembly is installed on the right side of the transverse moving assembly, a cutting assembly is arranged on the right side of the radian adjusting assembly, and the radian adjusting assembly comprises a supporting shell. Lifting guide columns are fixedly installed on the two sides in the supporting shell, second guide blocks are movably installed on the outer sides of the lifting guide columns, a lifting base is arranged on the right side of the supporting shell, the lower end of the lifting base is fixed to the second guide blocks through bolts, a hydraulic cylinder is installed in the supporting shell, and a hydraulic rod is arranged at the upper end of the hydraulic cylinder. The upper end of the hydraulic rod is connected with the lifting base. In actual use, the radian adjusting assembly ensures the stability and accuracy of the hydraulic cylinder and the hydraulic rod in the lifting process through stable clamping of the lifting guide column and the second guide block on the two sides, shaking and deviation are effectively avoided, and the risk that a plastic part is scratched due to inaccurate positioning is reduced.

The invention relates to the technical field of product detection, in particular to a plastic mold production quality detection method and system. The method comprises the following steps: acquiring in-mold pressure data of each cavity of the multi-cavity mold in a plastic injection molding process and mold wall temperature data of a cooling stage; determining a pressure rise acceleration curve based on the in-mold pressure data of each cavity; based on the pressure rising acceleration curve and a preset fluctuation threshold value, a filling fluctuation index of the melt filling stage is determined; based on the mold wall temperature data, a cooling hot spot index of a cooling stage is determined; and comparing the filling fluctuation index with a filling fluctuation threshold value, and comparing the cooling hot spot index with a cooling hot spot threshold value to obtain a detection result of the production quality of the plastic mold. The objective of the invention is to solve the problem of early cracking, deformation or structural failure of a product caused by difficulty in accurately detecting the product produced by a plastic mold in the prior art.

The application relates to the technical field of injection molding equipment, in particular to a double-station rapid mold changing plastic injection molding machine, which comprises an injection molding assembly, a workbench and a bearing assembly, the bearing assembly comprises a limiting frame, a lower mold, a connecting piece and a connecting block, a one-key synchronous locking structure composed of a worm wheel, a worm, a double-side screw rod and an insertion block is arranged, synchronous fixing and loosening of the left and right lower molds can be realized by only rotating a handle, repeated disassembly and assembly of bolts are not needed, mold changing steps are greatly simplified, mold changing time is shortened, double-station rapid switching requirements are met, and production efficiency is remarkably improved; the limiting frame and the connecting block are inserted and positioned, the insertion block is transversely locked, mold automatic centering is realized, installation deviation and misplacement are effectively avoided, mold closing precision is improved, product flash, burrs, size deviation and other problems are reduced, and molding quality and the finished product rate are improved; the worm wheel and worm structure has a self-locking function, cannot be loosened after being locked, is uniformly stressed, is high in reliability, and improves equipment operation stability and use safety.

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.

This invention discloses a fully automatic hybrid electric plastic injection molding machine, comprising: a frame; a mold clamping mechanism for closing and opening the mold; an injection mechanism including a melt cylinder, a feeding screw disposed within the melt cylinder, and an injection drive assembly; an injection stage moving mechanism for driving the injection mechanism to move relative to the mold clamping mechanism on the frame, approaching or moving away from the mold clamping mechanism; a hydraulic mechanism including an oil pump, a hydraulic valve group, and hydraulic lines, wherein the oil pump is connected to the mold clamping cylinder of the mold clamping mechanism and the injection stage moving cylinder of the injection stage moving mechanism via hydraulic lines; an electric drive device for independently driving the feeding screw to rotate to achieve plastic feeding and plasticizing; and a control module electrically connected to the hydraulic mechanism and the electric drive device. This invention can reduce energy consumption, improve plasticizing control accuracy and product quality stability, reduce the load on the hydraulic system and maintenance costs, and achieve deep parallel plasticizing and molding actions to improve production efficiency.

This invention discloses a rotary multi-station bottle cap injection mold for use in the field of plastic injection molding. A circular tube at the corner of the rotating block moves synchronously with the moving mold during switching, thereby sweeping and drying the surface of the stationary mold with hot air. This effectively eliminates condensation caused by temperature differences on the surface of the stationary mold, ensuring injection molding quality after mold closing. Simultaneously, hot air is introduced through a recovery chamber and a return pipe into the preheating chamber inside the moving mold that is about to be switched and closed, realizing the recycling of waste heat and preheating the moving mold before it is to be used. This reduces energy loss caused by the clash of hot and cold, combining the dual functions of drying the surface of the stationary mold and energy-saving preheating. Furthermore, by setting a cleaning component at the end of the feeding pipe and using a pointed block, efficient and stable removal of cold slug plugs is achieved.

This invention belongs to the technical field of injection molding dies, specifically relating to an injection molding die for medical plastic parts. It includes a mounting plate, with a manifold seat connected to the center of one shaft end of the mounting plate. Multiple pairs of rotationally symmetrical fixed and moving molds are connected to the manifold seat at the end furthest from the mounting plate. The moving molds are all located at the ends of the fixed molds furthest from the manifold seat. Connecting plates are connected to the ends of the fixed molds furthest from the center of symmetry, and linkage gears are connected to these connecting plates. Drive gears mesh externally with the linkage gears. A drive motor and the linkage gears drive the mounting plate, manifold seat, and the multiple pairs of rotationally symmetrical fixed and moving molds. This allows the fixed and moving molds to automatically cycle through the following steps during rotation: mold closing and injection, pressure holding, cooling and molding, and mold opening and unloading. This enables multiple pairs of molds to simultaneously perform different production stages, achieving uninterrupted continuous production, reducing waiting time, and improving production efficiency.

The invention relates to a fan wheel as a component element for an assembly with rotatably movable components, comprising a centrally arranged fan wheel hub and a plurality of fan wheel blades, wherein the fan wheel exhibits an influence on the mass distribution, the influence on the mass distribution being formed by a partial adjustment of the geometry in at least one balancing area of ​​the fan wheel. Furthermore, the invention relates to an assembly with such a fan wheel and to a plastic injection molding process for producing an overmold of a rotor as a first component element for an assembly and for producing a fan wheel as at least a second component element for an assembly.

The utility model provides an electric vehicle plastic part injection molding process excess material recycling device which comprises an excess material collecting box, a feeding hopper and a filter screen and further comprises a filter screen knocking assembly, the filter screen knocking assembly comprises a knocking shell, a crank connecting shaft and a flywheel, and the knocking shell is in an inverted triangle shape and is fixed to the middle of the bottom end of the filter screen; the flywheel is integrally arranged on the crank connecting shaft, and the flywheel and the crank connecting shaft are distributed in the knocking shell. According to the filter screen knocking assembly, the filter screen knocking assembly comprises a knocking shell, a crank connecting shaft and a flywheel, the knocking shell is in an inverted triangle shape and is fixed to the middle of the bottom end of the filter screen, and the flywheel is integrally arranged on the crank connecting shaft and distributed in the knocking shell together with the crank connecting shaft; the arranged driving mechanism is used for applying power, the crank connecting shaft can be driven to continuously rotate in a reciprocating mode, blockages at meshes of the filter screen can be knocked out, meanwhile, materials located on the filter screen can be better screened, and excessive accumulation is avoided.

The utility model relates to a plastic injection molding head which comprises a feeding conveying pipe, a material distributing cylinder and an adjusting sleeve, one end of the material distributing cylinder is connected with the feeding conveying pipe, and the other end of the material distributing cylinder is sealed; the adjusting sleeve is rotatably arranged outside the material distributing barrel in a sleeving manner and is in sealing fit with the material distributing barrel, and the adjusting sleeve is connected with a rotation driving mechanism; a vertical first injection molding pipe is arranged at the bottom of the adjusting sleeve, a vertical second injection molding pipe is arranged at the top of the adjusting sleeve, a feeding port is formed in the bottom of the material distributing barrel and communicates with the first injection molding pipe, and a cleaning mechanism is arranged above the second injection molding pipe. According to the injection molding device, the adjusting sleeve can be used for driving the first injection molding pipe and the second injection molding pipe to sequentially move to the injection molding position and the cleaning position, when one injection molding pipe is subjected to injection molding, the other injection molding pipe can be cleaned, the two working procedures are carried out at the same time, and the production efficiency is guaranteed.

This utility model discloses an integrated aluminum alloy and plastic injection molding structure for walkie-talkies, comprising an aluminum alloy panel and a plastic panel. By employing a novel injection molding process, this utility model achieves integrated injection molding of the aluminum alloy and plastic, ensuring both the aesthetics and durability of the plastic material surface while maintaining the metallic texture and strength of the aluminum alloy surface. This optimizes the assembly process and significantly improves product quality. Furthermore, connecting sleeves are attached to the outer side of the plastic panel. These connecting sleeves contain components such as an anti-slip layer, a cavity, a reinforcing layer, and a support plate. These components work together to increase the strength of the connecting sleeves, preventing cracking or damage during panel installation and removal due to excessive force. This effectively extends the service life of the components and demonstrates strong practicality.

The utility model discloses a stable plastic injection molding integrally-formed chair, and relates to the technical field of plastic chairs. The stable plastic injection molding integrally-formed chair comprises a seat plate, a supporting frame, a split type cushion plate, a sleeve seat and a locking assembly. According to the stable plastic injection molding integrally-formed chair split type cushion plate, different types can be conveniently replaced according to seasons, the sitting feeling requirements of users in different seasons are met, the split type cushion plate is convenient to disassemble and assemble, firm to install and not prone to loosening due to the design of the locking assembly, and the service life of the split type cushion plate is prolonged. Due to the split design and the structural design of the seat plate and the split cushion plate, heat accumulation during sitting can be avoided, and the sitting comfort is improved; the seat plate, the supporting frame and the sleeve seat are of an integrally-formed structure, so that the structure of the whole chair is more stable, the service life of the chair is prolonged, the use safety of the chair is improved, and a convenient, comfortable and stable seat choice is provided for a user.

The utility model provides an injection molding device for a plastic box body, which relates to the field of plastic injection molding and comprises a working platform, the top of the working platform is fixedly connected with a first support, and the top of the first support is fixedly connected with a heating and pushing assembly; raw materials are conveyed through the heat conduction packing auger, the heating module is combined for deep heating from inside to outside, uniform and efficient heating of the plastic raw materials is achieved, and the fluidity of the raw materials is improved. The stable conveying structure guarantees timely and stable raw material conveying, avoids blockage, improves production efficiency, solves the problem of uneven raw material heating and conveying in the prior art, uses a second motor to drive a threaded rod, and through synchronous transmission of a belt pulley and a transmission belt, a compression block and a material injection frame are matched to extrude the raw materials, so that uniform and stable extrusion is guaranteed, and the plastic raw materials are uniformly stressed; the density, strength and appearance precision of the formed plastic box are improved, the higher quality standard is achieved, and the problem that in the prior art, the extrusion forming effect is poor is solved.

The utility model discloses a heat dissipation device, which comprises a shell, the shell is formed by plastic injection molding, two opposite sides of the shell along the height direction are respectively provided with a first cavity and a second cavity, the first cavity is internally provided with an electroplating area, the electroplating area is electroplated with a metal layer, a plurality of components are mounted on the metal layer, and the first cavity and the second cavity are communicated with each other. A circuit is constructed through the metal layer and is used for realizing electric connection among all components; the cooling liquid inlet and the cooling liquid outlet are respectively communicated with the second cavity; and the lower cover plate seals and blocks the second cavity to form a cooling cavity, and the cooling cavity is used for cooling components on the metal layer after the cooling liquid is introduced into the cooling cavity. Therefore, the LED lamp has the advantages of being light in weight and high in forming speed, the manufacturing process and the assembling steps are simplified, and therefore the overall assembling efficiency is improved. And meanwhile, the types of required materials are reduced, and the material cost is effectively reduced.

The invention relates to the technical field of plastic injection molding, and discloses a thermoplastic plastic product injection molding device based on waste recycling, which comprises an injection molding machine body, the top of the injection molding machine body is provided with a fixing plate, the fixing plate is provided with a conveying pipe, one side of the top of the injection molding machine body is provided with a feeding bin, and the feeding bin is communicated with the conveying pipe. And a movable mold is arranged on the other side of the top of the injection molding machine body. According to the thermoplastic plastic product injection molding device based on waste recycling, through cooperative operation of the first demolding part and the second demolding part, the demolding problem caused by grooves and protrusions of a traditional device is thoroughly solved. A pushing assembly of the first demolding part is matched with an extruding assembly, so that a product and a mold can be stably separated from multiple directions, and tensile deformation and breakage are avoided; the brake assembly accurately controls the demolding speed, and the situation that parts rotate too fast to damage products is prevented. The first-stage demolding structure and the second-stage demolding structure of the second demolding part eliminate the risk of scratches and indentations.

The utility model discloses a product packaging box capable of being opened by opening a flip cover with notches on three sides, which comprises an inner box lower bottom, an inner box upper cover, a box inner surrounding edge strip, an inner box filling module, a box inner product specification decorating part and outer mounting surface paper, and the folding edges of the inner box lower bottom and the inner box upper cover are realized by opening V-shaped grooves. The inner box lower bottom and the inner box upper cover are made of 600g-1800g of card paper, or plastic injection molding parts and wood plates, and when the card paper is selected, multiple layers of card paper can be oppositely mounted to achieve the required thickness and strength; the inner box surrounding edge strip is arranged in the inner box and is made of card paper, paper boards, wood boards or medium density fiberboards with certain hardness. Therefore, the three-edge-cut flip type packaging box can bring novel box opening experience, the surrounding edge strips and the outer mounting surface paper improve the aesthetic feeling and the texture, the packaging requirement of high-end products is met, the inner box filling module is made of materials according to the size, the cost is reduced, the cost performance is high, the size range is wide, the packaging box can be matched with products in multiple industries, and reliable protection can be provided for the products in cooperation with the protection assembly; the application prospect is wide.

The utility model relates to the technical field of plastic injection molding, and discloses a cooling device of a plastic injection molding machine, which comprises an injection molding machine body, a control system is arranged outside the injection molding machine body, and a mold closing system and an injection molding system are arranged at the top of the injection molding machine body. According to the cooling device of the plastic injection molding machine, by arranging the cleaning mechanism, when a mold needs to be cooled, a hose is communicated with a water path in the mold, a circulating water cooling machine and a connecting pipe are started through a control system to conduct water circulation on water flow with heat, and when the water flow enters a cleaning frame through the hose, the cleaning frame is closed; the scale slag is driven by water flow to impact on the pressure-bearing block and then filtered through the fine filter screen, the scale slag enters the collecting barrel through the discharging pipe with the wide upper portion and the narrow lower portion, the scale slag is separated through the conical block and prevented from flowing back from the discharging pipe, the cleaning mechanism can treat the scale slag in water circulation in time, cold water circulation is prevented from being affected, and therefore the cooling speed is guaranteed.

The invention discloses an automatic temperature adjusting type injection molding device, and relates to the technical field of plastic injection molding, the automatic temperature adjusting type injection molding device comprises a rack, a conveying unit, a material mixing unit and an anti-blocking unit, the rack is used for providing a mounting and fixing foundation for the conveying unit, and the material mixing unit is used for uniformly mixing temperature loss hardened materials and molten materials; the anti-blocking unit is used for cleaning hardened materials on the inner wall of the discharging port of the charging barrel, in the process that the conveying unit conveys the materials for injection molding, due to the fact that the heat dissipation area of the inner wall of the discharging port of the charging barrel is large, the inner wall is prone to being influenced by low-temperature return of a mold or environment airflow, heat losses quickly, and the materials are gradually attached to and solidified on the inner wall of the discharging port. And hardened materials on the inner wall are cleaned through the anti-blocking unit, blocking is avoided, meanwhile, the hardened materials and fresh melt are re-mixed uniformly in cooperation with the mixing unit, and the processing quality of products is guaranteed.

The utility model relates to the field of plastic injection molding equipment, in particular to an optical injection molding part feeding mechanism which is mounted in a hot cutting machine and used for feeding injection molding parts and comprises a mounting frame, a driving part mounted on the mounting frame in the length direction and a fixing seat fixedly connected with the driving part. Two mounting grooves are symmetrically formed in the side, away from the fixing base, of the strip-shaped plate in the length direction, the opposite sides of the two mounting grooves communicate with the two sides, in the length direction, of the strip-shaped plate correspondingly, two-way air cylinders are slidably connected into the two mounting grooves correspondingly, and the ends, away from the strip-shaped plate, of the two-way air cylinders are connected with sliding bases; a sliding groove is formed in the side, away from the two-way air cylinder, of the sliding base in the length direction, and two clamping rods are symmetrically arranged in the sliding groove in a sliding mode and are both in transmission connection with the two-way air cylinder. The device has the effects that the feeding mode of the injection molding part can be changed, so that the injection molding part is more stable during hot cutting and moving, and the effect that the structure of the injection molding part is complete is guaranteed.

The utility model discloses a cooling device of a plastic injection molding machine, which comprises a mounting component, a driving component fixedly mounted below the mounting component, a cooling body mounted at one end of the driving component and used for wrapping and fixing a discharge pipe of the plastic injection molding machine, and a plurality of slide rails movably mounted on the driving component, the end, away from the mounting assembly, of the sliding rail is fixedly connected with a cooling assembly used for cooling the plastic molded product, the cooling assembly comprises a plurality of hollow oil tanks, the ends, close to each other, of the oil tanks are movably connected with heat conduction patches, and the positions of the oil tanks are adjusted through the heat conduction patches. A plurality of oil tanks are connected pairwise through a plurality of heat conduction patches, the forward and reverse rotation motor drives the double threaded rods to rotate so that the oil tanks can be close to one another, finally the oil tanks are fixed through the lower plate and the fixing bolts, and the upper oil tank and the lower oil tank are fixed through the mortise and tenon joint structure. Therefore, the whole oil tank can wrap and cool the charging barrels with different sizes.

The utility model discloses a kind of plastic injection molding part cooling setting device, it is characterized by: including pressing plate, setting seat, a plurality of compression driving units being set on setting seat, and compression chuck assembly, setting groove for placing workpiece is equipped on the setting seat, the compression chuck assembly can be driven by the compression driving unit and press down pressing plate, so that pressing plate can compress workpiece in setting groove. The above structure guarantees that workpiece does not deform when quickly cooling in water, greatly shorten cooling time, improve production efficiency.

The utility model is applicable to the technical field of plastic injection molding production, and discloses a plastic injection molding rim charge removing device which is characterized in that a fixing plate is fixedly mounted at the middle end of the side edge of the top of a processing table, an electric push rod is fixedly mounted on the side edge of the fixing plate, and a mounting plate is fixedly mounted on the side edge of a transmission shaft of the electric push rod through a coupler; connecting plates are fixedly mounted on the surfaces of the two ends of the side edge of the mounting plate, material pumping mechanisms are arranged on the outer sides of the connecting plates, and waste storage tanks are fixedly mounted on the two sides of the top of the machining table. According to the technical scheme of the utility model, when the scraper is used for scraping and deburring the outer side edge of a plastic product placed on the surface of the rotating table, burr offcut can be immediately sucked into the feeding pipe by negative pressure after falling off, and then is conveyed into the waste storage tank through the connecting pipe and the conveying hose; and the burr offcut is collected and treated, and the situation that the burr offcut of the plastic product drifts away at will, so that the construction environment is polluted, and other machines are damaged is avoided.

The application relates to the technical field of injection molding equipment, and particularly discloses injection molding equipment for plastic injection molding, which comprises a fixed base, an injection molding operation box, a raw material conveying box, a discharging pipe, a feeding hopper, a preheating mechanism, an injection molding mechanism arranged in the injection molding operation box and used for injection molding, and a conveying mechanism arranged in the raw material conveying box and used for conveying raw materials; the injection molding operation box and the raw material conveying box are fixedly connected with the fixed base; the two ends of the discharging pipe are respectively communicated with the raw material conveying box and the feeding hopper; the preheating mechanism comprises a boosting block, a propelling block, an air heat conduction assembly, a plurality of turnover assemblies equidistantly arranged along the width direction of the discharging pipe, a plurality of gas flow guide assemblies equidistantly arranged along the width direction of the discharging pipe, a slip assisting hole opened on the discharging pipe, and a driving assembly used for driving the boosting block to reciprocate along the length direction of the raw material conveying box; and the problem that the preheating temperature is uneven when the existing injection molding equipment preheats plastic particle raw materials is solved.

The invention relates to the technical field of injection molding, in particular to a bio-based plastic injection molding method and system applied to an in-ear headphone, and the method comprises the following steps: acquiring a polylactic acid material set and a polyhydroxy ester material set, acquiring a test sample by using an initial material set, and performing property test on the test sample to obtain a mixed material melting point, a material viscosity index and a material shrinkage rate; and calculating a target injection molding temperature, a target injection molding pressure and a target dwell pressure based on a preset initial gas ripple degree, a preset initial color difference degree, a mixed material melting point, a material viscosity index and a material shrinkage rate, and carrying out injection molding on the dry material by using a target injection molding machine and an earphone mold to obtain the bio-based plastic. And the high-definition camera is used for conducting surface detection on the bio-based plastic, the material gas stripe degree and the material color difference degree are obtained, the target plastic is collected, a target plastic set is obtained, and bio-based plastic injection molding is completed. The automation degree of the injection molding process can be improved, and the product quality is improved.

The utility model relates to the field of toy processing, in particular to a plastic injection molding machine for toy processing. The plastic injection molding machine for toy processing can cool plastic toys subjected to injection molding and comprises a base, a driving motor, a conveying frame, a feeding frame, a spiral feeding rod, a heater and the like, the driving motor is installed on the left side of the top of the base, and the right side of the driving motor is communicated with the conveying frame; the left side of the top of the conveying frame communicates with a feeding frame, the right side of an output shaft of the driving motor is connected with a spiral feeding rod located in the conveying frame, a heater is installed at the top of the base, and a conveying pipe of the heater communicates with the conveying frame. By starting the cooler, the cooler can transmit cold air into the injection molding shell, so that the formed plastic toy can be cooled, and people are prevented from being scalded when taking out the formed plastic toy.

The invention relates to an injection unit for multi-component injection molding with a plastic injection molding machine, comprising two plasticizing units (1, 2), which are arranged on a support (3) overlapping one another and each of which is configured for producing a melt and injecting the melt into a molding tool. In order to achieve a significant simplification when changing the lower plasticizing unit, according to the invention it is proposed that the upper plasticizing unit (2) is pivoted upward about a suitably arranged horizontal axis (9, 12) into a maintenance position relative to the lower plasticizing unit (1) and thereby creates a space for free access to the lower plasticizing unit. By means of suitable support elements (10, 13) the upper plasticizing unit (2) can be held in the maintenance position. The upper plasticizing unit (2) can be pivoted into the maintenance position via a first axis of rotation (9) together with a support frame (8) that supports the upper plasticizing unit or via a second axis of rotation (12) relative to the support frame (8).

The utility model discloses a disassembly and assembly structure for a heating assembly of a plastic injection molding machine. The disassembly and assembly structure comprises a main body assembly and a heating assembly, wherein the main body assembly comprises a mounting table and a mounting frame; the mounting frame is fixedly connected to the top end of the mounting table; the dismounting and mounting assembly comprises a mounting groove, a pulling plate, a rotating gear and a placing plate; the mounting groove is formed in the center of the interior of the mounting table, the placing plate is slidably connected to the interior of the mounting groove, the pulling plate is fixedly connected to the front end of the placing plate, the rotating gears are rotatably connected to the two sides of the inner wall of the mounting groove, and the dismounting and mounting assembly further comprises threaded rods, clamping blocks and tooth grooves. The threaded rod is fixedly connected to one end of the rotating gear. The problems that when an existing heating device is used for a long time by a worker, the interior of the heating device breaks down easily, the worker needs to conduct regular overhaul on the heating device, and in the overhaul process, due to the fact that the heating device is installed in a machine, disassembly and assembly are tedious, and the operation space is narrow are solved.

The utility model relates to the technical field of injection molding processing, and discloses a buffer mechanism for a plastic injection molding machine, which comprises an upper mold fixing plate and a lower mold fixing plate, a buffer assembly is arranged between the upper mold fixing plate and the lower mold fixing plate, and the buffer assembly comprises an air rod and an air sleeve. One end of the air rod penetrates through the side wall of the corresponding position of the air sleeve in a sliding mode and extends into the air sleeve, when mold closing operation is carried out, the air rod can extrude the air sleeve, the driving piece drives the adjusting piece to carry out adjustment, and therefore the splicing plate drives the splicing arc plates to be closed, buffering operation is carried out, and when mold opening operation is carried out, the air sleeve can be pulled out through the air rod. The air rod can reversely move in the air sleeve, so that the driving piece drives the adjusting piece to adjust, the splicing plate drives the splicing arc plate to be gradually separated, the efficiency of external air entering the air sleeve is improved along with movement of the air rod, and the situation that the mold opening efficiency is affected due to limitation of the air tap is greatly reduced.