669 results about "Plasticulture" patented technology

The invention discloses a plasticizing industry intelligent logistics scheduling method based on order prediction, and relates to the field of plasticizing product logistics, and the method comprises the steps: predicting the order demands of a plurality of clients for plasticizing products in a preset time window based on historical data, and constructing a knowledge graph based on client nodes, order nodes and mark nodes corresponding to orders; in the knowledge graph, attribute parameters are added to each mark node, and the attribute parameters comprise the melt flow rate, the color grade and the additive grade; constructing a switching scoring function based on the attribute parameters; on the premise of ensuring that all orders are delivered in a preset time window, constructing a total objective function which comprehensively considers the total driving mileage, the vehicle cleaning cost score and the customer cleaning cost score; and by taking minimization of the total objective function as an objective, generating a scheduling scheme by adopting an optimization algorithm. According to the invention, the problem of cross contamination caused by neglect of trademark replacement in a traditional scheduling method is effectively solved.

The invention relates to the technical field of co-extrusion molding, in particular to a multi-layer co-extrusion molding method of a building composite membrane material, which comprises the following steps: melting and plasticizing a polymer mixture of each layer, and then synchronously co-extruding to obtain a composite tubular melt blank; injecting gas into the composite tubular melt blank and drawing to obtain a composite tubular bubble; judging whether the preparation of the composite tubular vesicle reaches the standard or not according to the vesicle form characterization value; cooling and curing the composite tubular film bubbles reaching the standard to obtain a composite tubular film; when it is judged that the preparation of the composite tubular membrane does not reach the standard according to the circumferential cooling uniformity characterization value, an adjustment strategy when the preparation of the composite tubular membrane does not reach the standard is determined according to the circumferential wind speed extreme value ratio of the cooling wind ring; and flattening and rolling the composite tubular membrane reaching the standard to obtain the composite membrane material for the building. The co-extrusion forming efficiency of the composite membrane material for the building is improved.

The invention provides a recovery device for building waste plastic building materials, and relates to the field of waste recovery devices.The recovery device comprises a feeding mechanism, a crushing mechanism, a separating mechanism and a melting granulation mechanism, and further comprises a crushing system and an electric control system; according to the crushing system, a primary crushing unit is driven by a first variable frequency motor; the secondary crushing unit is arranged at the discharging end of the primary crushing unit and is driven by a second variable frequency motor; the screening unit is arranged below the secondary crushing unit; wherein the electric control system is electrically connected with the first variable-frequency motor and the second variable-frequency motor and used for independently controlling the rotating speeds of the first variable-frequency motor and the second variable-frequency motor so as to drive the primary crushing unit and the secondary crushing unit to do differential relative motion, and the screening unit is used for returning substandard materials to the primary crushing unit to be crushed again. Multi-stage differential crushing and intelligent closed-loop control are adopted, airflow separation and magnetic separation impurity removal are combined, efficient and energy-saving production is achieved through segmented melting and plasticizing, and the treatment efficiency and the purity of a finished product are improved through an automatic system.

The embodiment of the invention relates to the technical field of artificial intelligence, and provides a supply chain management method and system based on artificial intelligence. The method comprises the following steps: collecting multi-dimensional supply chain data in real time; and carrying out dynamic quality evaluation on the data, automatically correcting data deviation by adopting an isolated forest abnormal value restoration model in combination with an evaluation result, and obtaining corrected data. And based on plasticizing industry chain platform business scenes, identifying transaction, inventory, logistics and quality detection subjects matched with the scenes in the correction data, aggregating the data according to the scenes and the corresponding subjects, forming a supply chain data set of each scene, and establishing and dynamically updating a supply chain data lake. And extracting supply chain operation characteristics of each scene from the data lake through a space-time diagram convolution model, and predicting a demand change trend of each scene according to the supply chain operation characteristics. The trend input graph attention generative adversarial network is used to predict multi-level inventory distribution, then each scene inventory management scheme is generated, dynamic supply chain management of each business scene is realized, and the supply chain data quality and management degree are improved.

A process for forming extruded products using a device having a scroll face configured to apply a rotational shearing force and an axial extrusion force to the same preselected location on material wherein a combination of the rotational shearing force and the axial extrusion force upon the same location cause a portion of the material to plasticize, flow and recombine in desired configurations. This process provides for a significant number of advantages and industrial applications, including but not limited to extruding tubes used for vehicle components with 50 to 100 percent greater ductility and energy absorption over conventional extrusion technologies, while dramatically reducing manufacturing costs.

The invention relates to the technical field of plastic films, in particular to an antibacterial degradable film and a preparation method thereof. The problem that a traditional degradable film is poor in antibacterial property and mechanical property is solved. The film is prepared from the following raw materials: PLA, PBS, PHA, PCL, modified nanocellulose, an antibacterial agent, composite antibacterial particles and maleic anhydride grafted PLA. The preparation method comprises the following steps: preparing functional master batches from silane coupling agent modified nano-crystalline cellulose and PLA, preparing antibacterial master batches from ZIF-8 loaded tea polyphenol antibacterial agent, mesoporous silica loaded chitosan composite antibacterial particles and PBS, adding the rest of matrix resin, functional master batches, antibacterial master batches and compatilizer into an extruder step by step, and carrying out extrusion molding to obtain the composite antibacterial material. And after mixing, plasticizing and exhausting, blow-molding to form a film, thereby obtaining the antibacterial degradable film. The mechanical property is enhanced through the functional master batch, and the composite antibacterial system has synergistic interaction, so that the film has excellent antibacterial property and mechanical property on the basis of degradability.

The invention belongs to the technical field of photovoltaic backboards, and particularly relates to a high-reflection integrally-formed backboard for a single-glass assembly and a preparation method thereof.The preparation method comprises the following steps that S1, a PET film base material is provided, plasma surface treatment is conducted, then polyurethane coating is coated on the two sides to form an outer-layer weather-proof fluorine coating and an inner-layer functional coating respectively, and the outer-layer weather-proof fluorine coating and the inner-layer functional coating are formed; a CPC backboard base material is obtained; s2, white high-reflection EVA granules are fused and plasticized, a white EVA adhesive film is obtained through extrusion of a hanger type T-shaped flat die head, then the white EVA adhesive film is compounded with the inner functional coating of the CPC backboard base material, and a firm complex without a definite physical interface is obtained through rolling; s3, cooling the composite body through at least two stages of cooling rollers to obtain a coiled material; and S4, the coiled material is irradiated, and the high-reflection integrally-formed backboard is obtained.

The invention discloses a rod feeding type stirring friction additive manufacturing device capable of continuously providing an upsetting force, relates to the technical field of additive manufacturing, and aims to solve the problems that when an existing stirring friction deposition additive manufacturing device adopts a rod for feeding, the upsetting force is easy to interrupt, the feeding continuity is poor, and the production efficiency is high. The internal tissue compactness and the external geometric accuracy of the component are further influenced. The device comprises a supporting shell, a stirring and plasticizing assembly, a feeding driving assembly, a storing and supplying assembly, a bar pushing piece and a bar with a matching structure. Continuous feeding is achieved through intermittent rotation of the storing and feeding assembly, rotary motion is converted into axial feeding of bars through transmission of a matched structure of the feeding driving assembly so as to provide continuous upsetting force, and the material plasticizing and mixing effect and the mechanism overload protection capacity are improved in cooperation with an elastic material processing piece of the stirring and plasticizing assembly. According to the invention, the continuity of bar feeding, plasticizing and depositing processes is realized, and the quality and the production efficiency of additive manufacturing components are effectively improved.

The invention relates to the technical field of foaming materials, in particular to a shoe material preparation process for finished shoes based on supercritical physical foaming and the finished shoes. The preparation method comprises the following steps: 1) weighing a matrix, octadecyl polyhedral oligomeric silsesquioxane, an active group-containing styrene-acrylonitrile copolymer, a polydimethylsiloxane block copolymer, an epoxy functional group-containing olefin copolymer, a nano silicon dioxide dispersion and a processing aid, uniformly mixing, blending, extruding, granulating and drying to obtain a blended material, wherein the matrix, the octadecyl polyhedral oligomeric silsesquioxane, the active group-containing styrene-acrylonitrile copolymer, the polydimethylsiloxane block copolymer, the epoxy functional group-containing olefin copolymer, the nano silicon dioxide dispersion and the processing aid are mixed uniformly; the preparation method comprises the following steps of (1) preparing a polymer, (2) plasticizing the blended material to form a preformed blank, injecting supercritical gas, and fully dissolving the supercritical fluid in the polymer at the temperature of 150-180 DEG C and the pressure of 10-20MPa for 1-3 hours, (3) reducing the pressure to normal pressure within 10 seconds at the pressure reduction rate of less than or equal to 2MPa / s, and (4) cooling and shaping at the temperature of 60-80 DEG C to obtain the shoe material.

The invention discloses plastic pipeline particles prepared from waste incineration fly ash and a preparation method of the plastic pipeline particles. The particles are prepared from the following raw materials in parts by weight: 5-25 parts of PE, 20-100 parts of superfine calcium carbonate, 1-5 parts of needle-like wollastonite, 1-5 parts of chopped carbon fibers, 1-15 parts of rutile type titanium dioxide, 10-75 parts of waste incineration fly ash, 1-20 parts of paraffin, 0.2-5 parts of a coupling agent and 0.5-10 parts of a dispersing agent. The preparation method comprises the following steps: 1, cleaning and airing the fly ash, and crushing and grinding the fly ash into 600-1250-mesh powder P; 2, mixing the powder P with inorganic fillers such as superfine calcium carbonate at a high speed of 100-130 DEG C to obtain a composite filler M; 3, mixing and modifying the filler M with a dispersing agent and a coupling agent at a high speed to obtain modified powder MP; 4, MP, PE and paraffin are mixed and plasticized at a high speed, and single-screw extrusion granulation is performed. The particles achieve fly ash recycling and are excellent in processability, the prepared PE pipeline is high in strength, resistant to corrosion and long in service life and can be used as an industrial or municipal sewage pipeline, and the preparation method is convenient, fast and efficient.

The invention belongs to the technical field of biomass composite material processing, and discloses a plant fiber-polymer composite material and a preparation method thereof. The plant fiber-polymer composite material is prepared from the following raw materials in parts by mass through plasticizing extrusion molding: 50 to 88 parts of plant fibers, 0.5 to 8 parts of a biomass cross-linking agent, 0.5 to 5 parts of a low-temperature water-soluble polymer, 10 to 50 parts of water and 0.05 to 3 parts of metal ions, wherein the metal ions and the biomass cross-linking agent form a reversible cross-linked network in the system through coordination; due to the existence of the reversible cross-linked network, the composite material can be plasticized and continuously extruded and molded under the shearing action at the temperature of 20-70 DEG C. The metal ion-biomass cross-linking agent coordination network provides high structural strength in a static state and is reversibly dissociated in a shear field, so that shear-driven plasticizing of a high-viscosity and high-fiber-content system in a low-temperature interval of 20-70 DEG C is realized.

The invention provides a high-strength corrosion-resistant CPVC plate and a preparation method thereof, and belongs to the technical field of high polymer materials, the preparation method comprises the following steps: S1, preparing Si-MBS; s2, mixing CPVC resin powder, Si-MBS, chlorinated polyethylene, a stabilizer, a processing aid, a lubricant and a coupling agent-hollow microsphere, melting, plasticizing, extruding, calendaring to form a plate, and cooling and shaping to obtain a CPVC base material; and S3, spraying the coating slurry containing ZIF-67 / GO-coated BTA / PEI powder on the surface of the CPVC base material, vacuumizing, and curing to obtain the high-strength corrosion-resistant CPVC plate. The overall strength and impact resistance can be improved, and meanwhile the overall corrosion resistance is improved.

The invention discloses a continuous foaming composite process for a pearl wool coiled material and a waste gas recovery system thereof, and belongs to the technical field of pearl wool processing. Aiming at the problems of low efficiency and waste gas pollution of a traditional intermittent process, the process realizes continuous production through raw material selection (the melt index of LDPE is 1.0-2.5 g / 10min), drying and mixing pretreatment, melting and plasticizing through a twin-screw extruder, injection of foaming agents such as butane under the pressure of 8-12MPa, extrusion foaming at a die head of 140-160 DEG C and combination of air-cooling and water-cooling shaping. The compounding link comprises multiple processes such as hot pressing and co-extrusion to adapt to different base materials, after-treatment is conducted through trimming, taper tension coiling and standing stress release, the product density fluctuation is + / -3%, and the peel strength is larger than or equal to 3 N / cm. According to the waste gas recovery system, negative pressure collection is conducted through a closed gas collecting hood, indirect cooling and alkali liquor spraying pretreatment are conducted, activated carbon adsorption concentration and catalytic combustion purification are conducted, the VOCs removal rate is larger than or equal to 98%, the emission concentration is smaller than or equal to 50 mg / m < 3 >, and efficient production and environmental protection benefits are achieved.

The invention relates to a preparation technology of a multifunctional plastic clothes hanger through cooperation of degradable color master batches and nitrogen filling injection molding, and belongs to the technical field of plastic products. Adding the polylactic acid, the styrene-acrylonitrile copolymer, the modified stone powder, the degradable color master batch and the compound additive into a horizontal helical ribbon mixer, stirring and drying to obtain a mixture; the dried mixture is added into an injection molding machine to be melted and plasticized, a screw pushes melt to be injected into a mold, high-pressure nitrogen is injected into the melt, and the melt is pushed to completely fill a cavity; the plastic clothes hanger is obtained through pressure maintaining, cooling and demolding; the compound additive is prepared from allyl alcohol polyoxyethylene ether, 2-octenyl succinic anhydride, 14-mercaptotetradecanoic acid, anhydrous tetrahydrofuran, 2-hydroxy-4 '-(2-hydroxyethoxy)-2-methyl propiophenone and triethylamine. The preparation method comprises the following steps: preparing the compound additive; the degradable material is adopted, the biodegradation rate is high, the mechanical property is stable, the coloring effect is good, fading is not prone to occurring, and the service life is long.

The invention discloses a preparation method for plasticizing and forming a flexible thin bamboo veneer, and belongs to the technical field of processing and application of biomass materials. The method comprises the following steps: soaking a thin bamboo veneer in a polyethylene glycol solution, and drying to obtain a polyethylene glycol impregnated material; uniformly coating the surface of the polyethylene glycol impregnated material with a silane coupling agent, and drying to obtain a coupling agent modified thin bamboo veneer; and hot-pressing and compounding the modified thin bamboo veneer and a hot melt adhesive to obtain the thin bamboo veneer composite material. Through pretreatment of the thin bamboo veneer and process optimization of hot-pressing compounding of the thin bamboo veneer and the degradable material, the tensile elastic modulus reaches 6654.41 N / mm < 2 >, the transverse flexibility and the water resistance are remarkably improved, and the application field of the thin bamboo veneer is expanded.

The invention discloses a preparation method of a photovoltaic high-thermal-conductivity insulating PVB intermediate film, and relates to the technical field of photovoltaic module packaging materials.The preparation method comprises the steps that hydroxylation treatment and silane coupling agent surface grafting modification are carried out on hexagonal boron nitride, PVB resin and a plasticizer are premixed to obtain pre-plasticized PVB resin, and the pre-plasticized PVB resin is subjected to surface grafting modification through a silane coupling agent; the modified hexagonal boron nitride and the pre-plasticized PVB resin are subjected to melt blending granulation through a double-screw extruder, composite granules are subjected to extrusion casting film forming through a single-screw extruder, and the high-thermal-conductivity insulating PVB intermediate film is prepared. The heat conductivity coefficient of the PVB intermediate film prepared by the invention can reach 0.5-2.0 W / (m.K), the volume resistivity is 1014-1016 omega.cm, and the PVB intermediate film is applied to photovoltaic module packaging, so that the heat dissipation performance of a module can be effectively improved, and the power generation efficiency is improved.

A process is disclosed for recovering soft poly(vinyl butyral) from a plasticized poly(vinyl butyral) multilayer sheet comprising stiff poly(vinyl butyral) and soft poly(vinyl butyral). The multilayer sheet. which may be scrap or recycled material. is first converted to a granulate form and then treated with plasticizer. This plasticizer treatment serves to remove the soft poly(vinyl butyral) component from the granulate. but thereby provides a varnish comprising the soft poly(vinyl butyral) mixed with excess plasticizer. This varnish is however highly viscous and thus difficult to handle or mechanically process. The present disclosure provides a solution to this handling problem by the addition of soft poly(vinyl butyral) having a lower concentration of plasticizer to the varnish. until a product is obtained having a sufficiently low concentration of plasticizer to render the product capable of mechanical processing. for example pelletizing. The resulting product can then be utilized to form soft poly(vinyl butyral) sheets, thereby improving the recyclability of scrap multilayer poly(vinyl butyral) materials.

The invention discloses a flame-retardant wear-resistant conveying belt for a coal mine and a preparation method thereof, and belongs to the technical field of wear-resistant conveying belts. Substances such as calcium nitrate tetrahydrate, ferric nitrate nonahydrate and antimony trioxide are subjected to hydrothermal coprecipitation to obtain multifunctional composite microspheres, the microspheres are aminated through a silane coupling agent KH-550 and then coated with silicon carbide, and coated composite microspheres are obtained; the preparation method comprises the following steps: carrying out graft copolymerization on nitrile rubber, octavinyl silsesquioxane and DOPO acrylate, compounding a quaternary phosphonium salt flame retardant to obtain modified nitrile rubber, carrying out three-stage mixing on the modified nitrile rubber, coated composite microspheres, conductive carbon black and other substances to obtain a rubber coating layer, carrying out double-sided calendering on the rubber coating layer and an epoxy resin plasticized aramid fiber skeleton layer, and carrying out vulcanization molding to obtain the composite material. And finally obtaining the flame-retardant wear-resistant conveying belt for the coal mine. The synergistic effect of high flame retardance, strong wear resistance and static electricity resistance is achieved, and the service life is prolonged.

The invention discloses a green low-carbon wood-plastic composite material continuous production system and an energy consumption management method, and relates to the field of wood-plastic composite material production. The raw material pretreatment module is integrated with a wood powder precise drying device, a plastic recycling device and an auxiliary material proportioning device, and the water content and the recycling purity are controlled; the continuous mixing and plasticizing module adopts a conical double-screw extruder, multi-section temperature control, combined screws and double-layer heat preservation; the forming and shaping module comprises a self-adaptive runner mold, a gradient cooling system and an online detection device; the waste closed-loop utilization module collects dust under negative pressure, crushes leftover materials and modifies and recovers the leftover materials; the clean energy supply module is integrated with a photovoltaic system, a biomass gasification furnace, a ground source heat pump and an energy storage system; the intelligent energy consumption management and control module collects data in real time and optimizes energy consumption through an algorithm. According to the invention, the renewable energy utilization rate and the waste utilization rate are improved, the energy consumption and carbon emission are reduced, the product quality is guaranteed, green low-carbon continuous production is realized, and the industrial sustainable development is promoted.

The invention discloses a degradable film blowing material and a processing technology thereof, and relates to the technical field of degradable film blowing materials, the degradable film blowing material comprises the following preparation raw materials by mass: 50-70 parts of modified polylactic acid, 20-50 parts of PBAT resin, 5-20 parts of modified starch, 3-10 parts of nano calcium carbonate, 2-5 parts of talcum powder, 1-5 parts of a dispersant, 1-5 parts of a plasticizer, 0.1-1.0 part of an antioxidant and 0.5-1.5 parts of a lubricant. The processing method comprises the following steps: S1, drying modified polylactic acid and PBAT resin, and plasticizing modified starch; s2, mixing the preparation raw materials of the degradable film blowing material, extruding, and granulating to obtain degradable master batches; and S3, carrying out film blowing molding on the degradable master batch to obtain the degradable film blowing material. The degradable film blowing material is relatively high in tearing strength and notch impact strength, and still keeps a relatively high degradation rate.

The invention relates to the technical field of plastic recycling, and discloses circulating nested plastic corner recycling injection molding equipment which comprises a machine base, a main machine barrel with a machine head at the left end is mounted at the upper end of the machine base through a mounting base, an exhaust screw is rotatably mounted on the inner wall of the main machine barrel, and a synchronous heating part is arranged on the outer wall of the exhaust screw. The circulating nested type plastic leftover material recycling injection molding equipment can effectively solve the problems that in the prior art, large-particle-size fragments which are not fully molten are prone to blocking a filter screen, a production line is forced to be frequently shut down to remove obstacles, the continuous production capacity is seriously restricted, particle size distribution dispersion of recycled leftover materials is high, and the production efficiency is high in the melting and mixing stage before injection molding. Due to heat conduction difference among particles, local plasticizing is insufficient or excessive degradation is caused, so that a final plastic product has apparent defects such as flow marks and mechanical property defects; and the recovered leftover material melt has high viscosity and is difficult to diffuse quickly after being directly put into a new plastic melt, so that the local concentration of the fused plastic melt is too high or too low.

The utility model relates to the technical field of high polymer material forming processing, and discloses a foam microcellular foaming forming device based on supercritical fluid, which comprises a mixing box, a discharge valve, a placing cylinder, an L-shaped frame and a driver, an adjusting mechanism is arranged on the mixing box, an auxiliary mechanism is arranged on the adjusting mechanism, the adjusting mechanism comprises a rotary column, and the rotary column is arranged on the placing cylinder. A sliding plate is fixedly connected to the rotating column, a concave-convex opening is formed in the outer wall of the top of the containing barrel, a telescopic spring is fixedly connected to the outer wall of the bottom of the containing barrel, a compression spring is fixedly connected to the inner wall of the bottom of the sliding plate, and a scraping plate is slidably connected to the inner wall of the bottom of the sliding plate; the outer wall of the side, close to the compression spring, of the scraper is fixedly connected with a stirring rod. According to the utility model, the sliding plate and other structures are arranged, so that the problem that the quality of a final product is influenced due to the fact that a molten raw material and a mixture are not fully and uniformly stirred when supercritical fluid is mixed in a special plasticizing device is solved.

To provide a technology that can suppress uneven heating when heating a molded object by a heating section.SOLUTION: The three-dimensional molding device comprises: a first heating section in a plate shape that has a heating surface for heating plasticization materials laminated on a stage, and has a through hole formed inside which at least a portion of the nozzle is positioned during molding of the three-dimensional molded object; a measurement section having a first sensor for measuring the position of the heating surface; and a control section. The heating surface includes a first heating area and a second heating area. The first heating section has a first heater section arranged corresponding to the first heating area and a second heater section arranged corresponding to the second heating area. The control section performs a first process of setting the output of the first heater section to be smaller than the output of the second heater section when, based on the measurement of the position of the heating surface, the distance between the first heating area and the stage is determined to be a first distance, and the distance between the second heating area and the stage is determined to be a second distance greater than the first distance.SELECTED DRAWING: Figure 1

The application discloses a high-efficiency melting screw structure, which comprises a feeding section, a compression section and a metering section arranged in sequence along an axial direction. The compression section is of a conical structure, and a core diameter thereof gradually increases from the feeding section to the metering section. The compression section adopts single-thread screw, and a relative deviation of a single-screw groove volume at any two adjacent complete pitch positions along the axial direction from a theoretical linear volume is not more than ±5%. The theoretical linear volume refers to a volume value determined by linearly changing a single-screw groove volume V_start at a first complete pitch position of a starting end of the compression section and a single-screw groove volume V_end at a last complete pitch position of a terminal end as a reference. The application controls linear change of the screw groove volume of the compression section accurately, homogenizes shearing force suffered by the material in the compression process, effectively reduces a local overheating risk, is suitable for processing of ABS fireproof materials, PC / ABS alloy and other heat-sensitive plastics, can significantly reduce quality problems such as yellowing and black spots, and improves plasticizing quality and product stability.

This invention discloses a production device for co-extruded mixed-color wood-plastic composite materials with wood grain imitation, in the field of wood-plastic recycling technology. The device includes a machine body, a twin-screw plasticizing component within the machine body, a second feed pipe containing a stirring component, a positive cone and an inverted cone whose lower ends can overlap to close the lower end of the second feed pipe, a metering mechanism for metering raw materials from the main hopper into the second feed pipe and adding a corresponding proportion of additives, and a secondary hopper located on the machine body and connected to both the second feed pipe and the twin-screw plasticizing component to buffer the mixture after stirring in the second feed pipe. The secondary hopper is funnel-shaped. The device allows for metered, multi-stage feeding and precise replenishment of raw materials, avoiding uneven mixing caused by direct replenishment in the main feed hopper. Pre-mixing improves the uniformity of additive dispersion, enhances wood grain color difference and mechanical property stability, reduces batch rework, increases production efficiency, and lowers the risk of thermal degradation of recycled materials.

This invention discloses a method for recycling and treating wastewater from concrete mixing plants, belonging to the field of solid wastewater recycling technology. It addresses the technical problems of low recyclability and ineffective recovery of fine aggregates and gel materials from concrete mixing plant wastewater during concrete processing. Specifically, the method includes the following steps: adding wastewater from the mixing plant to a settling tank, allowing it to settle for 1-3 days, separating the liquid to obtain settling slag and settling liquid. This invention regenerates and recovers solid impurities from concrete mixing plant wastewater, then combines it with fly ash to strengthen concrete. This not only effectively improves the plasticity and pumpability of concrete materials but also enhances their compressive strength and resistance to chloride ion penetration. Furthermore, the prepared recycled water can be directly used in concrete production and processing, regardless of the amount added.

The utility model relates to the technical field of waste rubber regeneration, in particular to a mixing device for devulcanizing and plasticizing waste rubber, which comprises a mixing barrel, a crushing and stirring component rotatably arranged in the mixing barrel, a driving component vertically and slidably arranged on the mixing barrel, and a lifting component arranged on the mixing barrel and positioned below the driving component, the driving assembly is in transmission connection with the crushing and stirring assembly, the driving assembly drives the crushing and stirring assembly to rotate, the lifting assembly is connected with the driving assembly, and the lifting assembly drives the driving assembly to vertically slide; the motor drives the transmission shaft to rotate so as to drive the crushing cutter arranged at the upper part of the filter screen to crush the waste rubber raw material again, so that the situation that some waste rubber fragments which are not crushed thoroughly influence and reduce the quality and performance stability of regenerated rubber is prevented; an electric push rod is started to drive a moving plate to move upwards, and then a transmission shaft connected through a synchronous rod is driven to move upwards, so that the filter screen is moved to the outside of the mixing barrel, and a worker can conveniently clean the filter screen.

This utility model discloses a rapid prototyping device for PET sheets, including a base, a mounting frame, a mounting plate, an extrusion roller A, a cooling head, and an adjustment structure. The mounting frame is mounted on the base, a fixing plate is mounted on the mounting frame, and another mounting plate is mounted on the fixing plate. An extrusion roller A is rotatably mounted between the mounting plates. A cooling chamber is formed in the extrusion roller A. A cooling head is mounted on the mounting plate, and one end of the cooling head is rotatably connected to the extrusion roller A. The cooling head is equipped with a water inlet and a water outlet. The water inlet is connected to a cold water pipe in the cooling head, and the water outlet is connected to a return water pipe in the cooling head. A coolant generator is externally connected to the water inlet and outlet. This utility model can rapidly cool the molten material, enabling rapid prototyping of PET sheets while maintaining shape stability. It improves the cooling effect and plasticizing efficiency, thereby enhancing the molding quality and performance of the PET sheets.

The application relates to the technical field of polymer material processing and molding, and discloses a temperature gradient control method for melting and plasticizing of food packaging PET bottle blanks. The method aims to solve the problems of static temperature control, poor melt homogeneity and weak process adaptability in the traditional plasticizing process. The method comprises the following steps: constructing an axial partition temperature setting model, dividing a solid conveying section, a melting transition section and a melt homogenization section and setting a reference temperature interval; deploying a distributed temperature sensing array to collect temperatures at key positions in real time; establishing a melt thermal state prediction model based on a non-Newtonian fluid heat conduction equation; dynamically regulating and controlling heating and cooling through a PID compound algorithm to realize closed-loop control of axial gradient and radial uniformity; and combining a process database to perform adaptive parameter correction. The application can significantly improve temperature control precision and melt homogeneity, enhance adaptability to raw material changes and high-speed production, effectively reduce bottle blank internal stress, wall thickness deviation and acetaldehyde content, and guarantee product quality and food safety.

The utility model relates to the technical field of preservative film preparation, and discloses a degradable preservative film preparation device which solves the problems in the background technology and comprises a feeding port, an extrusion plasticizing mechanism is arranged at the bottom of the feeding port, and a forming module is arranged at the end, away from the feeding port, of the extrusion plasticizing mechanism. The forming module comprises a first mold plate, the first mold plate is connected with the tail end of the extrusion plasticizing mechanism, the first mold plate is sleeved with a second mold plate, the two ends of the second mold plate are in threaded connection with lead screws, the two lead screws are connected with the output end of a rotating motor, and a through hole is formed in the first mold plate; the mold has the advantages that the mold does not need to be frequently replaced, the production and storage cost of the mold is reduced, the mold can be immediately completed according to the market requirement or the change of the product specification, and the production flexibility is greatly improved.