90 results about "Screw speed" patented technology

The invention discloses an extruder control system for cable protection pipe production, and relates to the technical field of cable protection pipe processing. Comprising a sensor module used for collecting operation parameters of the extruder, the operation parameters comprise the charging barrel temperature, the machine head temperature, the extrusion pressure, the screw speed and the traction speed, and a control module connected with the sensor module and used for receiving the operation parameters and generating a control instruction based on preset control logic and algorithm. A fuzzy self-adaptive PID algorithm is adopted for temperature control, nonlinearity and time-varying properties of extrusion temperature control can be adapted, the temperature control precision is improved, and the influence of temperature fluctuation on material extrusion is reduced, so that the quality of a cable protection pipe is improved; interference factors such as material characteristic changes can be effectively handled, stable control over extrusion pressure is achieved, and the production quality and production efficiency of the cable protection pipe are guaranteed.

The invention relates to the technical field of injection molding pressure control, in particular to a multi-stage pressure closed-loop compensation system and method for high-precision double-color injection molding, and the system comprises an interface gradient positioning module, a flow resistance state recognition module, a fitting function reconstruction module, a time sequence deviation triggering module and a gain reverse correction module. According to the method, the high-density measuring point data is collected, the interface radial pressure gradient change is extracted through the finite difference method, the stably-arranged nodes at the material intersection can be accurately locked, and the flow resistance state of the flow channel is judged according to the slope difference value of the screw speed and the pressure intensity change. A linear boosting or index slow increasing strategy is automatically switched to reconstruct a pressure function form, local high-pressure accumulation characteristics of a product sensitive area are accurately matched, the coincidence degree of a time window drift trend and a slope sudden change window is monitored, historical displacement and pressure errors are converted into backstepping factors through an iterative learning model, and the backstepping factors are calculated. And a driving gain curve is initialized and revised, so that forming deviation caused by thermal drift of equipment is eliminated.

A method for production of a compound used for manufacturing an article made of rubber, comprising: supplying components of the compound to a continuous mixer, the continuous mixer comprising: a screw extruder comprising at least one rotating screw housed inside a chamber, and an extrusion head that is coupled to the chamber; and transporting, by the screw extruder, the components through the chamber of the continuous mixer to the extrusion head by rotating the screw at a first screw speed, wherein the components are continuously mixed for producing the compound, and wherein the continuous mixer has a first temperature profile; measuring a compound pressure at the extrusion head; determining that the measured compound pressure deviates from a target pressure of the compound pressure; adjusting the compound pressure to the target pressure, wherein adjusting the compound pressure to the target pressure comprises: determining a second screw speed for rotating the screw; and when the second screw speed is outside a predefined range of the screw speed: rotating the screw at the upper, or lower limit of the predefined range of the screw speed, and determining a second temperature profile for adjusting the temperature profile of the chamber.

According to the plug cord injection molding on-line real-time detection method, an industrial camera array is integrated at key nodes of an injection molding machine, technological parameters of mold clamping force and screw rotating speed are synchronously collected, and a comprehensive signal collection system is constructed. By developing a defect recognition algorithm and combining a copper sheet three-dimensional positioning model and a plastic filling dynamic simulation database, micro-offset detection and early warning of bubble formation are realized. An image feature extraction and quantification technology and a three-dimensional reconstruction and micro offset extraction method are utilized to carry out high-precision analysis on the injection molding process. And a parameter adjustment mapping relation is established based on the defect type and severity, an injection molding parameter PID controller is developed, and online correction of the mold locking force and the screw rotating speed is achieved.

The invention provides a self-adaptive control method and system for an extrusion screw of a plastic extruder, and relates to the technical field of plastic recovery and regeneration, and the method comprises the following steps: collecting operation data of the plastic extruder; calculating a change trend and an effective value according to the machine head melt pressure; a three-level partition model is constructed, a pressure deviation value is calculated based on the effective value and the target reference value, and a pressure control area is generated according to a comparison result of the pressure deviation value and a pressure threshold value; performing consistency judgment on the change trend and the pressure demand direction to generate an adjustment coefficient, and performing step length correction by combining a pressure control region and a motor load current to generate a rotating speed adjustment amount; the to-be-executed rotating speed of the screw is calculated in combination with the real-time rotating speed of the screw, acceleration limiting processing is carried out to generate the target rotating speed of the screw, and the target rotating speed is coded into a control instruction to be sent to the driving unit, so that the self-adaptive control effect of the extrusion screw can be achieved, and false pressure fluctuation caused by material hardness change is effectively prevented; the extrusion stability and the response speed are obviously improved.

The invention discloses an extruder screw rotating speed intelligent matching and energy consumption compensation method based on deep learning, and relates to the technical field of monitoring analysis, and the method comprises the steps: collecting operation state parameters and material characteristic parameters corresponding to an extruder, constructing a material-equipment coupling data set, carrying out screw equivalent torque analysis based on the material-equipment coupling data set, and carrying out screw equivalent torque analysis based on the material-equipment coupling data set. Generating a screw load characteristic spectrum; temperature-pressure coupling field evolution simulation is carried out according to the screw load characteristic spectrum, melt phase change process parameters are obtained, and then an intelligent rotating speed control curve is generated; establishing an energy consumption compensation coefficient matrix, and performing phase difference compensation mapping on the energy consumption compensation coefficient matrix according to the electric parameter characteristics of the extruder driving motor winding to generate an energy consumption compensation instruction set; and constructing an energy consumption dynamic balance model, carrying out online optimization on the energy consumption dynamic balance model, generating a screw rotation speed-energy consumption cooperative controller, and deploying the screw rotation speed-energy consumption cooperative controller to an edge computing terminal.

The invention discloses high-strength nylon for a humanoid robot and a preparation method of the high-strength nylon. According to the composite material, MXD6 nylon and PA66 nylon are used as a composite matrix, chopped carbon fibers are used as a main reinforcement body, and a flexibilizer, an antioxidant, a lubricant and a nucleating agent are added. The preparation method comprises the following steps: performing vacuum drying on the raw materials, putting the dried raw materials into a double-screw extruder according to a specific ratio, and performing melt blending and granulation at a precisely controlled temperature interval (240-285 DEG C) and a screw rotating speed; and drying the obtained particles, and molding the dried particles into the required structural member through an injection molding machine under specific process parameters. Through synergistic interaction of MXD6 and PA66 and optimization of a processing technology, the composite material with high strength, high rigidity, high fatigue resistance, excellent impact toughness and extremely low water absorption is successfully prepared, and the technical problem that performance of an existing humanoid robot structural part material is unbalanced is perfectly solved; and the motion precision, the load capacity and the long-term reliability of the robot are obviously improved.

This invention relates to the field of polymer material processing and blending technology, and discloses a fiber uniform mixing process in the preparation of bio-based materials. The process includes: controlling the barrel wall temperature of the main dispersion zone of a co-rotating twin-screw extruder to be lower than the intrinsic melting point of the polylactic acid matrix and turning off the external heater; adding jute fiber bundles and the polylactic acid matrix and controlling the screw speed, utilizing the frictional heat balance temperature difference generated by mechanical shearing to maintain the actual melt temperature above the intrinsic melting point; and conveying the mixture to the secondary diffusion zone as the motor drive torque increases, thereby increasing the barrel wall temperature of the secondary diffusion zone and reducing the screw speed to blend the materials. This invention eliminates temperature control lag, maintains a stable shear flow field, avoids a sudden drop in melt viscosity to improve fiber dispersion uniformity, automatically indicates process stage transitions, avoids material thermal degradation, and improves the stability of the mechanical properties of the finished material.

The invention discloses extrusion molding equipment for plastic-wood floor production, and belongs to the technical field of plastic-wood floor production equipment.The extrusion molding equipment comprises an extrusion barrel and a die head assembly, an outer barrel body of the extrusion barrel is divided into a feeding section, a pressurizing section and a homogenizing section, a feeding screw, a pressurizing screw and a homogenizing screw are correspondingly arranged in all the sections, and stator assemblies are arranged on the outer side of the outer barrel body and correspond to all the sections; a rotor assembly is axially arranged in the screw, rotation of the screw is achieved through stator-rotor electromagnetic matching, and the rotating speed of each section of the screw can be independently controlled. The outer diameter of the pressurizing screw is gradually changed, and all the sections of the screw are flexibly connected and sealed through the inserting grooves, the inserting rods, the bearings and the shaft seals. A spiral water cooling pipe and a cooling assembly of radiating fins are arranged in the die head assembly, and the outer cylinder is provided with an exhaust structure with an arc-shaped baffle and a filter screen. Traditional transmission parts are omitted, the energy conversion efficiency is high, material plasticizing is uniform, product shaping is fast, the equipment continuous operation performance is good, and the forming quality and production efficiency of the plastic-wood floor can be improved.

An automatic uncoupled charging device includes a control system, a power system, a charging system, and an auxiliary system. The control system is equipped with a programmable circuit to control a screw speed. Explosives are charged into a container through manual handling or flowing from a mixed explosive vehicle. Explosive bags with different diameters are installed at the bottom of a discharge port. The device is set to start with one click, and the screw drives the explosive into the bag, achieving uncoupled charging. An automatic uncoupled charging method applying to the automatic uncoupled charging device not only reduces labor intensity, achieves fast charging, improves labor efficiency, but also achieves the goal of “mechanization reducing personnel”, further advancing towards the essential safety of blasting construction.

Disclosed in the present invention are a PET composite material having high temperature resistance and a preparation method therefor. The PET composite material having high temperature resistance comprises the following substances in parts by weight: 90.6-96.4% of PET, 1-4% of an impact modifier, 0.1-0.4% of a nucleating agent, 0.8-2% of a nucleation accelerator, and 0.5-2% of an adhesion promoter. The impact modifier has an ethylene content of 85-95%, and a functional group grafting rate is 1.5-4%. The PET composite material is prepared by the following method: (1) weighing the components according to a certain ratio, mixing uniformly, and stirring for 5 minutes using a stirrer; (2) putting same in a TSE-95 twin-screw granulator, wherein the granulation temperature is 250-280°C, and the screw rotation speed is 300-500 r / min; and granulating to obtain a final product. The PET composite material having high temperature resistance prepared in this application has both high temperature resistance and good mechanical properties; energy consumption is reduced, and the processing cycle is greatly shortened.

The invention relates to the technical field of polyethylene pipes, and discloses a low-temperature-resistant impact-resistant steel wire skeleton polyethylene pipe production process, which comprises: S1, carrying out melt extrusion on inner layer polyethylene to obtain modified polyethylene; the temperature is 180 DEG C, and the screw speed is 30-40 rpm; s2, steel wire skeleton preforming: pre-tightening a steel wire mesh through electromagnetic induction heating (the frequency is 27 MHz, and the power density is 0.5 W / cm < 2 >); and S3, dynamic vulcanization and co-extrusion: dynamically vulcanizing the modified polyethylene and the steel wire skeleton in a double-screw extruder (the dosage of a cross-linking agent DCP is 0.2 part by weight, the temperature is 160 DEG C, and the retention time is 3 minutes), carrying out gradient cooling, and demolding. According to the production process of the low-temperature-resistant and impact-resistant steel wire skeleton polyethylene pipe, the low-temperature-resistant and impact-resistant steel wire skeleton polyethylene pipe has relatively good low-temperature-resistant, impact-resistant, flame-retardant and tensile properties.

The application relates to the technical field of building, in particular to a high-molecular composite material for catalytic degradation of formaldehyde and a preparation method thereof, which comprises the following steps: determining the adding amount of a stabilizer based on the melt flow rate and the oxidation induction period of random copolymerized polypropylene, and modifying the stabilizer to obtain a first intermediate product; determining the preset feeding proportion of the first intermediate product based on the oxidation induction period of the first intermediate product; heating and blending raw materials in a screw extruder to obtain a second intermediate product, determining a mixed state characteristic value based on the density and the agglomeration index of the metal oxide, and determining whether the mixed state of the second intermediate product meets the standard, and checking the mixed state when the mixed state does not meet the standard; adjusting the screw rotation speed of the screw extruder based on the melt color uniformity feedback of the second intermediate product; and cooling and forming the second intermediate product after extrusion to obtain a product. The application solves the problem that the uneven dispersion of nanoscale metal oxide particles leads to the local degradation of formaldehyde.

The invention discloses a feeding device and method for slurry stirring, the feeding device comprises a material storage module, the material storage module comprises a material storage hopper and a vibrator, and the vibrator is fixed on the outer side of the material storage hopper; the conveying module comprises a conveying cylinder, one end of the conveying cylinder is communicated with the storage hopper, a conveying screw rod is arranged in the conveying cylinder, and the conveying screw rod is driven by a first power device to rotate; a sensing module; and the control module is used for acquiring the load current, comparing the load current with a preset threshold value, adjusting the rotating speed of the conveying screw rod based on a comparison result, and matching the duty ratio of the vibrator based on a comparison structure, so that the vibrator works at the matched duty ratio. Load current is collected in real time and compared with a preset threshold value, the rotating speed of a conveying screw and the duty ratio of a vibrator are dynamically adjusted, and the screw and the vibrator work cooperatively, so that self-adaption to powder characteristic fluctuation is achieved, material blocking and overload are prevented, and energy consumption is reduced.

The invention relates to the technical field of injection molding machine control, in particular to a self-adaptive control method and system for an injection molding machine. The method comprises the following steps: monitoring the time change rate of injection pressure at the initial stage of executing injection action by a screw rod, locking the moment when the pressure change rate suddenly changes to a non-return closing moment, and calculating a displacement difference value between the initial position of the screw rod and a non-return closing point as a backflow slippage amount; compensation control of double paths is synchronously executed on the basis of the backflow slippage amount, wherein the first path is geometric volume compensation, and position correction operation is executed on a preset injection pressure maintaining switching position; the second path is pressure maintaining pressure compensation, the viscosity attenuation coefficient is determined based on the backflow slippage amount and the screw rotating speed, and subtraction correction is carried out on the set pressure of the subsequent pressure maintaining stage. Through a dual-path compensation mechanism, the problem of melt backflow caused by closing delay of the non-return ring is effectively solved, and the size precision and the quality stability of an injection molding product are remarkably improved.

The application discloses a kind of high-strength high-toughness PET / PEF plastic alloy and preparation method thereof, and the preparation method process is as follows: S1: the preparation of PEF: using polymerization reactor, a certain proportion of 2,5-furandicarboxylic acid, ethylene glycol, catalyst, antioxidant and stabilizer are added, esterification is carried out at 210-230 DEG C for 2-2.5 hours, then slowly vacuum to less than 80pa, after 2-3 hours of polycondensation at 240-260 DEG C, press discharge to obtain PEF;S2: the prepared PEF is dried in blast oven, and PET is dried, then a certain proportion of PET, PEF, chain extender and plasticizer are added to high-speed mixer for stirring;S3: the mixed raw materials are added to double-screw extruder, set temperature and screw speed in each zone, after extrusion, granulation is carried out to obtain PET / PEF plastic alloy.The application uses furan polyester PEF as modifier to modify PET, at the same time, the strength and toughness of PET are enhanced, and the compatibility is good, without adding complex compatilizer, high-strength, high-toughness PET / PEF plastic alloy is obtained.

The invention discloses a control system and method for an intelligent screw grouting extruder, belonging to the technical field of wire and cable production. The control system comprises: a flow control module that monitors material flow in real time and adjusts the feed amount through fluctuation detection and frequency analysis; a temperature control module that monitors and predicts temperature deviation through a temperature sensor and adjusts heating power; a speed control module that initializes the screw speed according to material characteristics and monitors the screw load through a torque sensor to dynamically adjust the screw speed; a pressure regulation module that monitors and adjusts the pressure in the extruder cavity in real time and adjusts the distance between the die and the screw by calculating the pressure deviation; a quality detection module that detects the physical and visual quality of the product online through a laser rangefinder and image recognition technology and performs comprehensive quality evaluation. The invention solves the problem of how to dynamically adjust the operating state of the extruder according to parameters such as real-time temperature, flow, pressure and speed, thereby ensuring the consistency between the thickness of the cable sheath layer and the product quality.

The utility model provides a PCR (Polymerase Chain Reaction) tread pre-mouth-shaped plate, which solves the problems that when an existing pre-mouth-shaped plate is used in an existing PCR production line, the temperature of extruded and discharged rubber is too high, so that the quality of a tread finished product is influenced; and if the rotating speed of the screw rod is reduced, the extrusion efficiency of the tread is reduced, and the preforming die plate can be widely applied to the field of preforming die plates. The tire wing rubber runner structure specifically comprises a main plate, the main plate is in a rectangular pyramid shape with trapezoidal side faces, two tire wing rubber runners which are symmetrical about a vertical center line and provided with open top faces are formed in the top of the main plate, and the two tire wing rubber runners approach the vertical center line of the front face of the main plate from the back face of the main plate; the tire wing rubber runner is gradually narrowed from the tire wing rubber inlet to the tire wing rubber outlet; a first tread rubber runner and a second tread rubber runner which are symmetrical about a horizontal center line are formed in the middle of the main plate, and the first tread rubber runner and the second tread rubber runner are close to the horizontal center line from the back surface of the main plate to the front surface of the main plate and are communicated at the tail ends to form a tread rubber outlet.

The invention belongs to the technical field of corrugated pipes for wire harness protection, and particularly relates to a preparation method and application of polypropylene for preparing a corrugated pipe. The preparation method comprises the following steps: mixing ultra-low melt index polypropylene, a PP halogen-free flame retardant, an antioxidant and a lubricant, and putting the mixture into a twin-screw extruder, wherein the MFR of the ultra-low melt index polypropylene is less than or equal to 0.5 g / 10min; the extrusion temperature of the double-screw extruder is 210 DEG C or below, and the screw rotation speed is 220-260 rpm. The corrugated pipe prepared by the technical scheme provided by the invention is environment-friendly and halogen-free, and accords with RoHS (Room of Hazardous Substances) instructions; by optimizing the combined distribution of the screws of the double-screw extruder, the problem that the additive is easy to agglomerate in the processing process of the low-melt-index polypropylene is solved, the stability of melt extrusion is ensured, and the double-screw extruder is particularly suitable for molding of complex corrugated pipes.

The invention belongs to the technical field of methods for simulating and evaluating the wear resistance of a screw, and particularly relates to a method for simulating and evaluating the wear resistance of the screw based on discrete elements, which comprises the following steps of: constructing a three-dimensional assembly model of the screw and a machine barrel, importing the three-dimensional assembly model into discrete element simulation software EDEM, and finishing parameter setting in the EDEM, a particle model is created through a particle generator, the density and Poisson's ratio of particles, the static / dynamic friction coefficient with the surface of a screw and particle size distribution are defined, the density, shear modulus, Poisson's ratio and friction coefficient of the screw and a machine barrel are input, and the contact model is used for describing mechanical behaviors between the particles and between the particles and the screw. The abrasion model is used for representing the screw abrasion process, determining the size and the feeding efficiency of a virtual feeding factory, adjusting the rotating speed of the screw according to equipment parameters, configuring simulation calculation parameters and then starting simulation calculation.

It suppresses the generation of unnecessary shear insulation, preventing discoloration, yellowing, and burning of molded products, and dramatically improving molding quality. [Solution] In advance, as molding conditions, at least a torque target value Ts for screw rotation torque T and an upper limit value Ru for screw rotation speed R are set. During the plasticization process, the rotation of the screw 3 is controlled with respect to the torque target value Ts. At the same time, a graphic display screen 51 is popped up by a changeover switch 50 from the normal waveform display screen 11nn, which displays at least one change data of injection speed V, injection pressure Pp, and mold parting opening Lm during molding, to display at least one change data of screw position X, screw rotation torque T, and screw rotation speed R during the plasticization process.

The present invention is an optimization method for the structure of a single-screw mixing for direct writing based on a global optimization algorithm. The parameters to be optimized include six parameters: the width of the screw groove, the depth of the screw groove, the major diameter of the screw, the length of the screw, the compression angle, and the length of the extrusion section. First, constraint conditions are established according to the law of conservation of mass. Then, a parameter model is established based on the flow rate and pressure balance relationship of the slurry in the barrel. Finally, with the goal of minimizing the numerical solution of the screw speed, considering the constraint conditions, the combinations formed by the six parameters to be optimized are used as individuals of the global optimization algorithm, and the screw speed corresponding to the parameter combination is used as the fitness value of the individual. The optimal parameter combination is obtained through iterative optimization. It not only shortens the optimization time, but also improves the printing ability and shortens the printing delay distance.

The invention provides a comprehensive management system for tire production, which can be widely applied to the field of tire production. The extrusion regulation and control module is used for detecting whether a rubber material is stacked at a feeding hole of the open mill and regulating the rotating speed of a screw rod of an extruder; the conveying regulation and control module is used for detecting the meter weight of the film and adjusting the conveying speed of the conveying belt; the cutting regulation and control module is used for detecting the length of the cut film and adjusting the cutting position of the cutter; the extrusion regulation and control module comprises an open mill, an extruder and a first control unit, a photoelectric sensor is arranged at the position of a feeding port of the open mill, and the photoelectric sensor is used for detecting the sizing material stacking state of the feeding port of the open mill; the conveying regulation and control module comprises a conveying belt, a belt weigher and a second control unit, and the belt weigher is arranged below the conveying belt and used for weighing the weight of the tire tread conveyed on the conveying belt; and the cutting regulation and control unit comprises a cutting machine, a length measuring instrument and a third control unit, and the length measuring instrument is arranged at a discharging opening of the cutting machine and used for measuring the actual length of the cut tread.

The present invention relates to a time-varying controllable screw extruder and a speed regulation method thereof, wherein the time-varying controllable screw extruder comprises a base and a barrel arranged on the base, and further comprises: a cylinder arranged at one end of the barrel for transitionally conveying the raw material extruded by the screw inside the barrel, and an elastic follower mechanism is provided inside the barrel, which is triggered when the pressure inside the barrel changes, and a plurality of movable parts are movably provided on the base through an elastic sliding mechanism, and the plurality of movable parts are equidistantly distributed along the circumference and arranged in an arc shape, and are connected to the screw inside the barrel through a second transmission belt. The present application adopts a mechanical interlocking method to realize the regulation of the screw speed in the barrel. Compared with the existing control system, the present application avoids the problem of poor control performance caused by the high requirements of the sensor on the working environment in the existing control system, and can significantly improve the production effect.

The application discloses transparent flame-retardant polycarbonate and a preparation method thereof. The preparation method comprises the following steps: dry mixing polycarbonate resin, sulfonate flame retardant, a compatilizer and an additive in a high-speed mixer for 3-8 minutes; melt blending is performed by using a co-rotating twin-screw extruder to disperse the sulfonate flame retardant to a sub-micron level; wherein the twin-screw extruder is provided with a high-shear screw element in a mixing section, and the screw length-diameter ratio is 40:1 to 48:1; the screw rotation speed is 200-400 rpm; extruded strip material is water-cooled and pelletized to obtain transparent flame-retardant polycarbonate particles. By means of the micro-dispersion and compatilization process, micron-level dispersion and stable compatibility of the sulfonate flame retardant in the polycarbonate are realized, so that the flame-retardant efficiency and product life are improved while the high transparency is maintained.

The present invention relates to the technical field of polymeric compound preparation, and in particular, to a preparation method for a biodegradable material for injection molding. The method comprises: obtaining a material-melting thermal image in a melting zone of a twin-screw extruder during a polylactic acid melting process and melt flow sequences in the material-melting thermal image; obtaining melting coefficients on the basis of thermal value variations in the melt flow sequences; obtaining sequence categories on the basis of the melting coefficients, and obtaining a melting effect on the basis of the degrees of stable distribution in the sequence categories and the distribution of the melting coefficients; and adjusting a screw speed of the twin-screw extruder on the basis of the melting effect. According to the embodiments of the present invention, by analyzing the melting state of polylactic acid during a melting process, the melting effect is accurately quantified, thereby allowing for accurate control of the screw speed of the double-screw extruder, ensuring the quality of masterbatch products in the preparation process.

The invention relates to the technical field of high polymer materials, in particular to a polycarbonate composite material with high scratch resistance and stress cracking resistance and a preparation method thereof. The material comprises polycarbonate resin, a core-shell structure flexibilizer, a fluororesin wear-resistant agent, polytetrafluoroethylene wax, a compatilizer, an antioxidant and a lubricant. The method comprises the following steps: weighing the components according to the proportion, and mixing the components in a high-speed mixer for 3-10 minutes to obtain a premix; adding the premix into a double-screw extruder, performing melt extrusion, cooling and pelletizing to obtain the polycarbonate composite material, with the processing temperature range of the double-screw extruder being 220-260 DEG C and the screw rotating speed being 300-500 r / min; through the mode, on the basis of keeping excellent mechanical properties and heat resistance of PC, the surface hardness and scratch resistance of the polycarbonate composite material can be improved, and the polycarbonate composite material has extremely high resistance to chemical solvents and environmental stress.

The utility model discloses stainless steel cold rolling equipment which comprises a support, and through cavities are formed in the two side walls of the support. The gap adjusting device has the beneficial effects that by arranging the servo motor, the main gear, the transmission gear, the first driven gear and the second driven gear, when the gap between the cold rolling roller and the roller is adjusted, the servo motor drives the transmission gear to rotate through the main gear, and the transmission gear drives the first driven gear and the second driven gear to rotate; the specification of the first driven gear is larger than that of the transmission gear, so that the rotating speed of the screw connected with the first driven gear is low, the specification of the second driven gear is smaller than that of the transmission gear, so that the rotating speed of the screw connected with the second driven gear is high, and finally the three groups of cold rollers move downwards at different speeds. And gaps between the cold-rolled tubes and the rollers are gradually reduced, so that synchronous adjustment of the three groups of cold-rolled tubes can be realized.

The invention relates to the technical field of buildings, in particular to a polymer composite material for catalytic degradation of formaldehyde and a preparation method thereof.The preparation method comprises the steps that the adding amount of a stabilizer is determined based on the melt flow rate and the oxidation induction period of polypropylene random copolymer, and modification is conducted to obtain a first intermediate product; determining and adjusting a preset feeding proportion of the first intermediate product based on the oxidation induction period of the first intermediate product; heating and blending the raw materials in a screw extruder to obtain a second intermediate product, determining a mixed state characteristic value based on the density of the second intermediate product and the agglomeration index of the metal oxide so as to determine whether the mixed state of the second intermediate product reaches the standard or not, and verifying the mixed state when the mixed state does not reach the standard; adjusting the screw rotating speed of the screw extruder based on the melt color uniformity feedback of the second intermediate product; and extruding the second intermediate product, cooling and molding to obtain the product. The problem that the local formaldehyde degradation function fails due to uneven dispersion of nanoscale metal oxide particles is solved.

The invention discloses a production process of an ultra-high-gloss and ultra-leveling powder coating, which comprises a high-gloss screw rod, a material proportioning process and a production process, the high-gloss screw rod is used for reducing two threaded blocks of a feeding section and increasing two 60-degree screw blocks so as to improve the extrusion strength and the feeding efficiency, when the high-gloss screw rod is used, an extruder for preparing the material is selected, and the material proportioning process and the material proportioning process are adopted, so that the extrusion strength and the feeding efficiency are improved. A 65 machine with the model of Lingyu can be selected and matched with a modified highlight screw, the rotating speed of the screw of the extruder is controlled at the rotating speed of 45-50 per minute, the feeding speed is controlled at the speed of 20-25, the temperature of a first area and the temperature of a second area are controlled at 75-85 DEG C, and after all condition parameters are adjusted, the extruder can be used as an extruder. The preparation method comprises the following steps: preparing raw materials, carrying out proportional adjustment matching on the used materials needing to be prepared according to 100 kg of the raw material pair shown in the figure 4, pouring the matched raw materials into an extruder, finally selecting a mill for processing operation, and adjusting and matching the parameters of the mill.