741 results about "Plastics extrusion" patented technology

The invention provides a degradable plastic production method which comprises the following steps: acquiring an optimal raw material proportioning scheme, and controlling an intelligent batching system to perform automatic batching; temperature and humidity parameters of raw material storage and conveying links are obtained, and raw material pretreatment process parameters are dynamically adjusted in combination with time sequence data analysis; performing quality detection on the preprocessed raw materials, identifying defects and impurities of the raw materials by adopting machine vision and a deep learning algorithm, and removing unqualified raw materials; various raw materials are accurately weighed through an industrial robot and mixed according to the optimized formula proportion; a thermal infrared imager is adopted to monitor temperature field distribution of a plastic extrusion forming mold in real time, and finite element simulation analysis is combined to optimize mold structure design and a heating and refrigerating system; the extrusion molding process is monitored on line, material component changes are analyzed through a chemometrics model, and if degradation products exceed the standard, extrusion process parameters are adjusted or a mold is replaced.

The invention discloses an engineering plastic extrusion control system, and relates to the technical field of plastic processing, and the engineering plastic extrusion control system comprises the following steps: obtaining basic configuration information and a denaturation threshold value of target engineering plastic; determining a second constraint condition based on basic configuration information by taking a denaturation threshold as a first constraint condition, and supervising and training an optimization control module in combination with the basic configuration of the extruder; an extrusion task is read, extrusion full-cycle control analysis under constraint condition limitation is carried out in combination with an optimization control module, and a dynamic extrusion scheme is determined; executing a dynamic extrusion scheme, and determining a feedback regulation threshold value; carrying out extrusion state evaluation on an extrusion channel of an extruder, and positioning a feedback regulation point by combining with a feedback regulation threshold value with mold-based molding and curing state evaluation; and based on the feedback regulation point, performing feedback extrusion regulation based on the extrusion control system. The technical problems of low control precision, poor stability and low intelligent degree in the prior art are solved, and the technical effect of improving the engineering plastic extrusion quality and efficiency is achieved.

The invention relates to the technical field of plastic extrusion molding control, and particularly discloses a self-adaptive energy efficiency steady-state control method and system in a plastic extrusion molding process, and the method comprises the steps: collecting multi-dimensional data of the plastic extrusion molding process, the multi-dimensional data comprises process data representing the current production state, aging characteristic data representing the equipment health degree and auxiliary data; and performing preprocessing and feature fusion on the multi-dimensional data, calculating to obtain an equipment aging comprehensive index, constructing an aging trend prediction model based on a long-short-term memory network, and outputting an aging trend prediction value and aging rates of the screw and the machine barrel. According to the method, multi-dimensional data are collected in real time, the equipment aging comprehensive index and trend prediction model is constructed, the multivariable coupling coefficient and the multi-objective optimization function are dynamically corrected, and self-adaptive energy efficiency steady-state control under the equipment aging condition is achieved.

The invention relates to the technical field of blank visual inspection, in particular to a blank defect visual inspection method and system for a plastic extruder, and the method comprises the steps: carrying out the region segmentation of a real-time image, extracting a first-stage defect region, completing the preprocessing, and selecting a specific analysis path according to the defect type. Extracting multi-level defect features and forming a structured feature vector; the reliability degree of each feature is judged through feature integrity judgment and feature quality evaluation, real defects are recognized by adopting multi-stage judgment logic, defect type classification is carried out, and quality influence level multi-stage judgment logic and a branch processing strategy are given, so that accurate detection, classification and analysis of the defects of the plastic extrusion blank are realized. The detection accuracy and adaptability are remarkably improved, the optimal processing path can be automatically selected according to different production conditions and defect types, meanwhile, potential systematic problems are identified through defect correlation analysis, and comprehensive and in-depth information support is provided for quality control.

The utility model relates to the field of plastic manufacturing, in particular to a plastic extrusion granulator. According to the technical scheme, the plastic strip granulating device is characterized by comprising a rack, an extruder, a water cooling mechanism, a water blowing assembly, a traction assembly and a granulating assembly, the water cooling mechanism is fixedly installed on the rack and is adjacent to the extruder, extruded plastic strips enter the water cooling mechanism to be cooled and shaped, and the water blowing assembly is installed on the water cooling mechanism 3 to blow water on the surfaces of the plastic strips to be dry. The traction assembly is mounted on the water cooling mechanism, is adjacent to the water blowing assembly, pulls the plastic strip to move into the pelletizing assembly and is subjected to pelletizing, the traction assembly straightens the plastic strip, so that the plastic strip is cooled and shaped in the water cooling mechanism, the straightening and shaping possibility of the plastic strip is improved, and the straightening and shaping quality of the plastic strip is improved; and the subsequent pelletizing quality can be improved.

The utility model relates to the technical field of chemical fiber production, and discloses a screw extruder for chemical fiber raw materials, which comprises screw extrusion equipment for extruding waste plastics into chemical fibers, and a feeding device is arranged on the screw extrusion equipment; the feeding device comprises a mixed feeding mechanism and a plurality of groups of feeding mechanisms; the mixing and feeding mechanism comprises a mixing hopper, a feeding screw rod and a feeding motor; the feeding mechanism comprises a horizontal feeding cylinder, a feeding screw rod, a feeding motor and a feeding hopper; the feeding mechanism is used for conveying different waste plastics into a mixing hopper of the mixing and feeding mechanism; and the feeding screw rod is detachably mounted on the inner side of the horizontal feeding cylinder. The feeding mechanism is used for conveying different waste plastics into the mixing hopper to be mixed, the mixing feeding mechanism is used for fully mixing different types of waste plastics, the uniformity of raw materials is ensured, the detachable design of the feeding screw enables the maintenance and cleaning work of the equipment to be more convenient, the downtime is shortened, and the production efficiency is improved.

The invention discloses a traction device for an extrusion production line and relates to the technical field of plastic extrusion equipment. The device comprises a left wall plate, a bearing end cover, a deep groove ball bearing, a pull rod, a right wall plate, a left end cover, a right end cover, a reel, a steel wire rope, a pressing plate, a speed reducer and a servo motor, the servo motor is installed and connected with the speed reducer, the left end cover is installed at the driving shaft end of the speed reducer, the two ends of the reel are fixedly connected with the left end cover and the right end cover through screws respectively, a steel wire rope is wound on the reel in a spiral-line-shaped single-layer mode, and one end of the steel wire rope is fixed to the reel through a pressing plate. The left end cover and the right end cover are installed on the left wall plate and the right wall plate through deep groove ball bearings respectively, bearing end covers are installed outside the deep groove ball bearings, and the left wall plate and the right wall plate are connected through a pull rod. Constant-speed traction of the traction guide pipe in the extrusion production process is achieved, it is guaranteed that the pipe produced in the pipe guide stage is a qualified product, the production efficiency is greatly improved, and the pipe rejection rate is reduced.

The invention discloses an extrusion molding process of a low-wind-resistance overhead insulated wire. The process comprises the following stages: a plasticizing stage; in the forming stage, a wire core or a conductor penetrates through the semi-extruded tube type mold; in the shaping stage, after the plastic extrusion material is cooled by a cooling water tank or a cooling pipeline, an amorphous plastic state is changed into a shaped solid state; the semi-extruded tube type die comprises a die core and a die sleeve, the die core is sleeved with the die sleeve, the die sleeve is arranged in the machine head, and a hole matched with the periphery of the insulated wire is formed in the end of the die sleeve. The mold disclosed by the invention can be mounted in a plastic extruding machine, so that a special-shaped cable, such as a cable with a groove, is obtained; the wire structure and the corresponding mold structure are tightly matched, the structural parameters of the extrusion mold can be directly calculated according to related formulas, workers do not need to measure the structural parameters every time, a parameter value adjusting method is set, formula calculation is more accurate, and therefore cost is reduced, and working efficiency is improved.

The utility model relates to the technical field of ceramic ball production equipment, and discloses a forming device for ceramic balls, which comprises a mounting base, and an extrusion component for performing plastic extrusion forming on a mud section is fixedly mounted on one side of the mounting base; through the arrangement of the extrusion assembly, the mold assembly and the fixing assembly, when a ceramic ball is subjected to forming production through a plastic extrusion forming process, the position of the mold assembly is adjusted to the center of the extrusion position of the extrusion assembly through the fixing assembly, deviation between the mold assemblies is avoided, and after the position is adjusted, a mud section is put into the mold assembly; the extrusion assembly is used for being matched with the mold assemblies to extrude the mud sections into mud balls, the mold assemblies can be rapidly disassembled after extrusion is completed, the mud balls can be conveniently taken down from the mold assemblies to be collected, and therefore the ceramic balls are high in forming speed and convenient to collect, and the surfaces of the mud balls cannot be damaged.

The utility model belongs to the field of express plastic bag production, and particularly relates to a plastic extruder with an anti-blocking feeding function, which comprises a support base, an extruder body is mounted at the top of the supporting base; a feeding pipe is mounted on the side surface of the extruder body; a feeding hopper is fixed to the top of the feeding pipe through a fixing bolt. A supporting frame is fixedly connected between the bottom of the feeding hopper and the top of the supporting base. Through the structural design that the mounting frame is arranged in the feeding hopper to drive the rotating shaft to rotate, then the rotating shaft drives the stirring blades to rotate, and plastic particles are stirred, the function of effectively avoiding blockage and bridging in the feeding hopper is achieved, and the problem that when the plastic particles are put into the plastic extruder, the plastic particles cannot be blocked is effectively solved. The problems that plastic particles are prone to blockage, bridging and the like at a feeding port, the feeding port is blocked, the plastic particles are affected to enter the extruder, and machining of the plastic extruder is prone to being affected are solved.

The invention relates to the technical field of cable extrusion, and discloses a cable production plastic extrusion device which comprises a supporting mechanism, winding mechanisms, a melting mechanism and an extrusion mechanism, and the two winding mechanisms are detachably connected to the two sides of the top of the supporting mechanism correspondingly so as to wind and release a cable; the melting mechanism comprises a drainage cylinder arranged in the middle of the top of the supporting mechanism, and the drainage cylinder is located between the two winding mechanisms and used for bearing molten plastic melt. According to the plastic extrusion device for cable production, the multiple scraping plates are detachably connected to the inner side wall of the conveying pipe in the opposite directions, when a wire penetrates through a molten plastic melt in the conveying pipe, the scraping plates can evenly scrape the melt on the surface of the wire for multiple times, and compared with a traditional mode that only the wire penetrates through the melt without a coating structure, the scraping plates are convenient to use; the problem that the thickness deviation of the insulating layer is too large due to lack of accurate control can be effectively avoided.

The utility model discloses a discharging frame for U-shaped gasket machining, and relates to the technical field of plastic gasket machining. The device comprises a moving frame, a cutting assembly is fixedly connected to the interior of the moving frame, a partition assembly and a collecting assembly are slidably connected to the interior of the moving frame, a plastic extruder is fixedly connected to the outer surface of the cutting assembly, the cutting assembly is used for cutting off plastic produced by the plastic extruder, and the partition assembly is used for blocking the U-shaped gaskets. According to the U-shaped gasket forming device, the cutter is connected with the baffle, the motor drives the cutter to rotate, when a blank enters the discharging groove in the baffle from the forming groove, the cutter cuts off the blank from the position between the forming groove and the discharging groove, the U-shaped gasket is formed, then the cutter returns from the position below the forming groove, the cutter back of the cutter can be prevented from making contact with the blank in the forming groove, and therefore the U-shaped gasket is formed. The cut U-shaped gasket falls down along the baffle, the baffle separates the U-shaped gasket from the cutter, and the situation that the cutter breaks the U-shaped gasket can be avoided.

The invention relates to the technical field of plastic extrusion production, in particular to a polyethylene plastic rim charge recycling extruder which comprises a base, a gear motor, an extrusion screw, a supporting frame and a heating cylinder and further comprises a feeding frame, a feeding hopper, a smashing assembly, a driving motor and an extrusion assembly. The smashing assembly is arranged on the inner side of the feeding frame and the inner side of the feeding hopper, the driving motor is installed on the outer side of the feeding hopper, and the driving motor is in transmission connection with the smashing assembly. According to the invention, the fed polyethylene film rim charge is sheared and crushed, the size of the polyethylene film rim charge is reduced, and then the polyethylene film rim charge is continuously pressed, so that the problem that the whole extruder needs to be improved in a large scale due to the existence of a large amount of air in the mutually stacked polyethylene film rim charge during secondary production of the recycled polyethylene film rim charge by the extruder is solved; the extrusion production cost is increased, and a large amount of improvement funds need to be consumed.

The invention discloses an ultra-large type high-speed plastic extrusion flat film and flat filament unit which comprises an extruder, a water tank, a film lifting and filament cutting device, a hot air oven, a drafting mechanism, a shaping mechanism and a filament collecting mechanism. The drafting mechanism comprises a drafting rack, a drafting transmission shaft, a drafting shaft unloading device, a drafting roller, a drafting roller connecting sleeve, a drafting roller tensioning sleeve and a drafting roller motor; the number of the drafting transmission shafts is at least three, the drafting transmission shafts are arranged in parallel, the drafting shaft unloading devices extend to the middles of the drafting transmission shafts from one ends of the drafting transmission shafts, and at least two drafting roller connecting sleeves arranged in the radial direction of the drafting roller are arranged in the drafting roller. And a drafting roller tensioning sleeve is arranged between the drafting roller connecting sleeve far away from the drafting rack and the drafting transmission shaft. The ultra-large type high-speed plastic extrusion flat film and flat filament unit is high in operation speed, high in production efficiency, good in stability, low in energy consumption, capable of effectively reducing the production cost, excellent in product mechanical performance and stable in quality.

The utility model discloses a novel gel packaging bottle, and relates to the technical field of medicine packaging, according to the novel gel packaging bottle, a plastic extrusion head, a silica gel sleeve and an extrusion frame are arranged, so that a bottle opening can be made into a bent, flat and wide shape, and an effect similar to a smearing effect can be achieved after extrusion; by matching with uniform-speed movement and equal-force gel extrusion of an operator, a treatment or detection area can be uniformly coated, the bent part of the silicon rubber case has the effect of scraping the residual gel after treatment, the edge scraping function of the scraping plate can be realized through reverse-direction scraping, the redundant gel can be scraped, and by replacing silicon rubber cases of different models and specifications, the operation is simple, and the cost is low. The width and the gap size of the packaging bottle opening can be changed, the range is adjusted by combining the eye anatomical structure characteristics, and operation is more convenient.

A threshold assembly 400 is mounted in use on a door sill 2 to seal a gap below the bottom surface 13 of an exterior door 10. The assembly includes first and second metallic parts 20, 30, e.g. aluminium extrusions, joined by an insulative body (40, fig 7F), e.g. a plastics extrusion, which extends below the bottom surface of the door when closed. A compression seal 50 is arranged in compression between a stop surface of the first part and a first side 11 of the door when closed. A bottom seal 60, 70 is mounted on the insulative body to engage the bottom surface of the door when closed. Drainage holes 45 may be formed through the insulative body 40 to open within an upwardly open recess 41 defining an air pocket 80 below the bottom surface of the closed door in-between the compression seal and the bottom seal.

In order to attach a transverse rib to a finished HDPE winding pipe while using a winding type forming process, and the transverse rib needs to be consistent with the winding type forming pipe to have the capacity of coherent production, a plastic extruder head needs to be designed, and the plastic extruder head and the winding type forming pipe rotate synchronously while the transverse rib is extruded. The utility model designs an axial straight rib linkage laying machine head which comprises a shell which is fixed on an external rack and at least comprises two parts which are combined into a ring shape, and a groove is formed in the shell and used for placing an extrusion ring; the extrusion ring is embedded into the shell, a communicating groove is formed in the top surface of the ring, an extrusion opening die is installed on an inner ring, the communicating groove is communicated with the extrusion opening die, through holes are axially formed in the surface of the extrusion ring, and the through holes are formed in the extrusion ring at equal intervals; the groove of the shell is matched with the communicating groove of the extrusion ring to form an annular cavity; and an input hole is formed in the shell and is communicated with an external plastic extruder and the annular cavity.

The utility model discloses a cooling device for a plastic extruder, and relates to the technical field of plastic extruders, including a cooling box, wherein a spray chamber, a water cooling chamber and a blast chamber are sequentially arranged inside the cooling box from left to right, wherein a spray mechanism is arranged in the spray chamber, a water cooling mechanism is arranged in the water cooling chamber, and a blast mechanism is arranged in the blast chamber. The utility model sequentially conveys extrusion pieces through the spray chamber, the water cooling chamber and the blast chamber through the cooperation of each group of conveying racks, and firstly sprays and cools the extrusion pieces through a spray head, so that the extrusion pieces are initially cooled, and then soaked in cold water in the water cooling chamber, and gradually transitioned to a low temperature to prevent the extrusion pieces from being damaged, and then the water on the surface of the extrusion pieces is blown dry by a fan.

The utility model relates to the technical field of granulation equipment, in particular to a detachable granulation template for a plastic extrusion granulator, which comprises an inner core, a middle ring is arranged on the outer edge of the inner core, an outer ring is arranged on the outer edge of the middle ring, and a plurality of granulation belts which are annularly distributed and connected end to end are arranged on one side of the middle ring; the mounting structure is arranged in the granulation belt, and the mounting structure is used for facilitating mounting and dismounting of the granulation belt; the granulation belt can be conveniently mounted and dismounted through arrangement of the mounting structure, the granulation belt can be quickly mounted and dismounted through mutual cooperation of the expansion part, the threaded rod and the threaded hole, and compared with existing structural arrangement, the granulation belt can be quickly mounted and dismounted when damaged, operation is easy and convenient, and the granulation belt can be quickly mounted and dismounted through cooperation of the expansion part, the threaded rod and the threaded hole. And meanwhile, under the mutual cooperation of a limiting block, a connecting strip, a spring, a mounting plate, a connecting plate and a limiting hole, the position of the threaded rod can be self-locked in the using process, and the threaded rod is prevented from falling off in the using process.

The utility model relates to the technical field of plastic production, in particular to a plastic extruder which comprises an extruder body and a cushion block arranged at the bottom of the extruder body, the extruder body is fixedly connected with a feeding pipe, the feeding pipe is fixedly connected with a feeding hopper, and the feeding hopper is fixedly connected with a discharging pipe. The utility model discloses a plastic crushing device, which comprises a feed hopper and a feed pipe, a crushing mechanism for crushing plastic with larger volume is arranged in the feed hopper, the crushing mechanism comprises two crushing rollers, and the feed pipe is provided with a spiral blade used for feeding, so that the plastic with larger volume is crushed by adopting the crushing mechanism, and the crushed plastic falls into the feed pipe; according to the plastic extruder, the first motor drives the spiral blade to rotate, then plastic in the feeding pipe is conveyed into the extruder body, the extruder body can rapidly melt the plastic with the large size through the smashing mechanism, then the plastic is conveyed through the rotating spiral blade, and the situation that the plastic is blocked in the feeding pipe is avoided.

The utility model discloses an extrusion molding machine for producing a high-temperature-resistant cable. The extrusion molding machine comprises a supporting table and a constant-pressure extrusion mechanism, a material barrel is arranged on the upper surface of the supporting table, an extrusion pipe is arranged at a discharging opening in the right end of the material barrel, the right end of the extrusion pipe is connected with a forming mold through a bolt, a feeding pipe is arranged at a feeding opening of the material barrel, a screw is rotationally connected to the middle of the inner wall of the left side of the material barrel, the screw is attached to the inner arc face of the material barrel, and a heat insulation shell is arranged on the outer arc face of the material barrel; and an electric heating ring is arranged in the heat insulation shell and makes contact with the outer arc face of the charging barrel, a single-chip microcomputer is arranged on the front surface of the supporting table, and the input end of the single-chip microcomputer is electrically connected to an external power source. And it is guaranteed that molten plastic is extruded out of the extrusion plastic machine at a certain pressure, the molten plastic is tighter, and the plastic effect of the molten plastic is improved.

The invention discloses a plastic extrusion molding machine, belonging to the field of plastic production. A plastic extrusion molding machine includes a spiral agent barrel and a feed port connected to the top of the spiral agent barrel, and also includes a grinding component capable of processing plastic particles to uniform size, the grinding component is connected to the feed port, and the grinding component includes a grinding cylinder and a centrifugal cylinder arranged in the grinding cylinder; a cleaning component elastically connected to the inner wall of the grinding cylinder, the cleaning component is annularly equidistantly arrayed on the outer wall of the centrifugal cylinder, the top of the feed port is symmetrically connected with two groups of feed troughs, a support plate is connected between the two groups of feed troughs, the grinding cylinder is rotatably installed above the support plate through a second rotating shaft, and the plastic particles to be processed are respectively ground twice, fully ensuring that the plastic particles are of the same size and ground evenly, thereby ensuring the same heating time, and being able to be heated evenly in the spiral agent barrel, and ensuring the finished product quality of the plastic product.

The invention discloses a titration zirconia ceramic microbead and a preparation process thereof, and mainly relates to the technical field of ceramic compositions taking zirconia as a base material. In the prior art, a zirconia ceramic microbead preparation process mainly comprises plastic extrusion forming, isostatic pressing forming and rolling forming, a traditional method is not completely suitable for batch production of zirconia ceramic microbeads with different particle sizes, the prepared microbeads have many internal structure defects, the structure uniformity cannot be guaranteed, and the defects of the prior art are overcome. The arrangement and combination mode of particles cannot be effectively controlled, so that the internal structure of the microbead is not uniform, and defects exist. Compared with the prior art, the titration method zirconia ceramic microbead preparation process provided by the invention can be suitable for batch production of large-particle-size and small-particle-size ceramic microbeads, pectin is taken as an adhesive, aluminum potassium sulfate is taken as a curing agent, pectin and aluminum potassium sulfate are subjected to a cross-linking reaction to generate gel, zirconia particles are wrapped in the gel, and the gel is cured to form zirconia gel beads; finally, the zirconium oxide ceramic microbeads with uniform internal structures and good wear resistance are obtained.

The utility model provides a twin-screw plastic extruder gearbox with a water cooling device, which belongs to the technical field of plastic processing equipment and comprises a bottom plate and a support plate fixedly connected to the top wall of the bottom plate, the top wall of the support plate is fixedly connected with a connecting plate, and the side wall of the support plate is fixedly connected with a first water cooling plate. The bottom wall of the connecting plate is slidably connected with a second water cooling plate, the side wall of the supporting plate is connected with a heat dissipation part used for increasing the cooling efficiency of the first water cooling plate and the second water cooling plate, the top wall of the bottom plate is slidably connected with a moving plate through a sliding groove, and the side wall of the moving plate is connected with an extrusion part used for fixing the gearbox. Wherein the extrusion part comprises a limiting groove formed in the side wall of a moving plate, an adjusting frame is rotatably connected to the inner wall of the limiting groove, a fixing assembly is slidably connected to the inner wall of the adjusting frame, the cooling efficiency of a first water cooling plate and a second water cooling plate is further improved through arrangement of an air blowing plate, and practicability is higher; and the stability of the gearbox is conveniently improved.

The present invention belongs to the field of plastic recycling technology, and specifically relates to a PC engineering plastic recycling cabinet, comprising a pulverizer, a plastic extruder, a granulation chamber, and a pulverization and cleaning chamber. An interlayer air-drying chamber is located between the granulation chamber and the pulverization and cleaning chamber. The pulverizer is installed in the pulverization and cleaning chamber, and a feeding device is connected to the bottom of the pulverizer. The feeding device passes through a cleaning tank and is connected to the air-drying chamber. A water hole is provided in the feeding device at the position corresponding to the cleaning tank. The granulation chamber is provided with a plastic extruder, and a granulation device is provided at the discharge end of the plastic extruder. The granulation device is used to cool the plastic. The granulation chamber is located near one side of the air-drying chamber and is located on both the upper and lower sides of the granulation device. A fan three is provided on each side of the granulation device. The air-drying chamber includes a porous rotary belt, the inner side of which is connected to the air outlet of the fan three. The present invention can fully automatically recycle and granulate defective products and scraps from the plastic production process in a small space.

The utility model provides extrusion equipment for plastic processing. The extrusion equipment for plastic processing comprises a supporting table, an extrusion pipe is fixedly connected to the top of the supporting table, a screening box is fixedly connected to the top of the supporting table, a separating screen is movably connected to the interior of the screening box in a sleeved mode, a smashing box is fixedly connected to the side face of the screening box, and a guiding and conveying pipe is fixedly connected to the bottom of the smashing box in a sleeved mode. According to the extrusion equipment for plastic processing provided by the utility model, the crushing box is arranged, when plastic extrusion processing is carried out, plastic particles are put into the screening box, so that the separating screen can guide and convey the plastic particles with larger volumes into the crushing box, and at the moment, a first motor is started; according to the plastic particle crushing and processing device, the first motor can drive the crushing blades to rotate rapidly, then plastic particles in the crushing box are crushed and processed, the plastic particles are conveyed into the screening box through the guiding and conveying pipe, the plastic particle crushing and processing effect is achieved, and convenience is brought to plastic extrusion and processing.

The invention relates to a plastic extruder with a multi-section temperature control function, which is applied to the technical field of plastic extruders and comprises an extrusion barrel, a feeding heating section module, a compression heating section module, a metering heating section module, a heating barrel part, a temperature control oil barrel, a drainage guide pipe, a communication port, a telescopic module, an opening and closing cover, a lifting air cylinder and a pressure piston. The extrusion barrel is provided with the feeding heating section module, the compression heating section module and the metering heating section module, and circulation of heat conduction oil among the feeding heating section module, the compression heating section module and the metering heating section module is controlled; the initial temperature of the feeding heating section module, the compression heating section module and the metering heating section module is increased and reduced, and temperature regulation and control of an electric heating coil on the heating cylinder part are matched, so that the time for reaching the target temperature is shortened, the temperature control regulation efficiency of the plastic extruder is effectively improved, and the hysteresis of temperature rising and falling regulation is effectively reduced.

The invention discloses an electromagnetic induction heating device for a plastic extruder, and relates to the technical field of plastic extruder heating, the electromagnetic induction heating device for the plastic extruder comprises an extruder main body and a mounting rack, and the outer surface of an extrusion pipe on the extruder main body is fixedly connected with a heat preservation ring pipe. A first bidirectional threaded rod drives a first transmission block and a first electromagnetic induction coil to reciprocate left and right, uniform electromagnetic heating is carried out on an extrusion pipe, meanwhile, heat preservation is carried out on the surface of the extrusion pipe through a heat preservation ring pipe, and meanwhile the extrusion pipe is heated while a connecting plate, a connecting column and a pushing plate are driven to reciprocate; the pushing plate drives the turbulent flow screw rod to move, and meanwhile, through flowing of the vent groove, hot air in the heat preservation ring pipe can flow in a reciprocating mode in a uniform mixing mode, so that hot air in the heat preservation ring pipe can evenly heat the extrusion pipe, and the extrusion pipe on the extruder body can be evenly heated.

The invention discloses plastic extrusion equipment for plastic waste processing and recycling, and belongs to the technical field of granulation extrusion equipment.The plastic extrusion equipment comprises a main body module, a remelting module and a quantitative discharging module, the main body module comprises an extruder main body, and the bottom of the extruder main body is fixedly connected with a bottom plate; a heat dissipation water tank is fixedly connected between the front end face of the extruder body and the top of the bottom plate, a granulator is fixedly connected to the top of the heat dissipation water tank, and a cooling assembly is arranged in the heat dissipation water tank. Through the arrangement of the lifting assembly, the equipment can distinguish over-large and over-small unqualified plastic particles, the unqualified plastic is fed into the hopper again through the lifting assembly to be remelted and extruded again, the unqualified particles are utilized, meanwhile, the discharging quality of the equipment is guaranteed, and the situation that the unqualified plastic can affect subsequent use is avoided.