A method for manufacturing a material storage plastic container with reinforcing ribs

Abstract

The present invention provides a manufacturing method for a plastic container for material storage with reinforcing ribs, which belongs to the technical field of material storage containers. Initial data is obtained through limit-general experiments, a group of equations for reinforcing rib parameters is constructed, and iterative optimization is performed using finite element analysis software. The augmented Latin hypercube experimental design method is used to screen candidate parameters, and small batch prototype samples are produced to conduct comprehensive performance tests such as static load, fatigue, environmental adaptability, impact resistance, chemical corrosion, temperature adaptability, sealing performance, and compressive deformation resistance. Based on the test results, the parameters with the best comprehensive performance are selected, and the injection molding process is accurately set, including temperature control, mold design, and surface treatment. The production line environment and quality are strictly controlled to ultimately achieve large-scale production of plastic containers for material storage, ensure stable and reliable product performance, and solve the problems of insufficient bearing capacity, deformation resistance, and service life of existing plastic containers for material storage.

Description

Technical Field

[0001] The invention belongs to the technical field of material storage containers, and in particular relates to a method for manufacturing a material storage plastic container with reinforcing ribs. Background Art

[0002] Plastic containers are widely used as storage containers in today's society and play an important role in home, warehousing, industry and other scenarios. Compared with traditional metal containers, plastic containers have advantages such as light weight, low cost and corrosion resistance, and have become the first choice in many fields. However, existing plastic containers still have some problems in terms of load-bearing capacity, deformation resistance and service life.

[0003] First, many plastic containers are prone to deformation or damage when subjected to heavy loads and external forces. This deformation may affect the sealing and structural integrity of the container, thereby affecting its performance and safety. Especially during transportation, loading and unloading, the container will be subjected to various impact and extrusion loads. If it cannot fully resist these external loads, it is easy to deform or damage, resulting in serious consequences such as container leakage and material scattering. This is undoubtedly a huge safety hazard for the storage of some important materials such as chemicals and food.

[0004] Secondly, existing plastic containers also have prominent problems such as material aging and fatigue damage during long-term use. Especially in harsh environments, such as high temperature, high humidity, chemical corrosion, etc., the service life of the container will be greatly shortened. Once a container fails, it may not only cause property losses, but also cause safety accidents such as environmental pollution and personal injury. Therefore, designing plastic containers with excellent fatigue resistance and environmental resistance has become an urgent technical need.

[0005] Finally, there are some problems in the structural design of existing plastic containers. Most containers adopt a single cylindrical structure and lack necessary reinforcement measures, which makes them weak in load-bearing capacity and overall stability. Some reinforcement measures, such as adding ribs to the container body, also have problems such as unreasonable design and insufficient structural strength. This limits the use of containers in high-load and harsh environments.

[0006] In summary, existing plastic containers for material storage have problems with insufficient load-bearing capacity, deformation resistance and service life. Summary of the invention

[0007] In view of this, the present invention provides a method for manufacturing a material storage plastic container with reinforcing ribs, which can solve the problems of insufficient load-bearing capacity, deformation resistance and service life of existing material storage plastic containers.

[0008] The present invention is achieved in that:

[0009] The present invention provides a method for manufacturing a material storage plastic container with reinforcing ribs, wherein the material storage plastic container comprises a container body and a container mouth, the container body is a cylinder, a plurality of annular reinforcing ribs are further arranged on the outer wall of the container body, the container mouth is a through-cylindrical structure, the lower part of the container mouth is connected to the top of the container body, and the container body, the container mouth and the plurality of annular reinforcing ribs are integrally formed; the manufacturing method specifically comprises the following steps:

[0010] S10, making an original sample of the container, obtaining initial experimental data of the container body and the reinforcing rib structure through an extreme-universal experiment, the initial experimental data including stress distribution data, deformation data, material fatigue data, structural stability data and bearing capacity data, and constructing a group of parameter equations of the reinforcing rib of the material storage plastic container based on the initial experimental data;

[0011] S20, calculating preliminary reinforcement rib parameters based on the reinforcement rib parameter equation group, wherein the reinforcement rib parameters include material parameters, quantity, spacing, height, thickness, and inclination angle of the reinforcement ribs;

[0012] S30, using finite element analysis software to establish a container model according to the preliminary reinforcement rib parameters, and adjusting the preliminary reinforcement rib parameters by means of meshing, boundary condition setting, material parameter definition, iterative optimization, and parameter sensitivity analysis to obtain optimized reinforcement rib parameters;

[0013] S40, using an augmented Latin hypercube experimental design method to obtain a plurality of candidate stiffener parameters based on the optimized stiffener parameters;

[0014] S50, producing a small batch of prototype samples based on the multiple candidate reinforcement rib parameters, and performing performance tests, including static load test, dynamic fatigue test, environmental adaptability test, impact resistance test, chemical medium corrosion test, temperature adaptability test, sealing performance test, and compressive deformation test, and selecting the candidate reinforcement rib parameters with the best comprehensive performance as the target parameters;

[0015] S60, based on the target parameters, using a preset process parameter empirical equation group to set the production process, specifically including injection molding temperature control, mold cavity design and surface treatment process, to ensure that the target parameters can be effectively achieved in actual production;

[0016] S70, setting the production parameter control in the production process, as well as the production line environment management and quality control, and finally realizing the large-scale production of the material storage plastic container with reinforcing ribs;

[0017] Among them, the parameter equation group of the reinforcing rib includes a stress intensity equation, a deformation limit equation, a material fatigue equation, a structural stability equation and a container bearing capacity equation; wherein the stress intensity equation is used to evaluate the bearing capacity and anti-destruction ability of the reinforcing rib; the deformation limit equation is used to determine the shape stability of the container under different loads; the material fatigue equation is used to predict the structural reliability of the container for long-term use; the structural stability equation is used to evaluate the overall stability of the container structure; the container bearing capacity equation is used to determine the rated performance of the container; wherein the process parameter empirical equation group includes an injection molding temperature control equation, a mold cavity design equation and a surface treatment process equation; the injection molding temperature control equation is used to determine the precise temperature control strategy during the injection molding process to ensure uniform melting and molding quality of the plastic material; the mold cavity design equation is used to optimize the mold cavity design to ensure the dimensional accuracy and surface quality of the final product; the surface treatment process equation is used to optimize the container surface quality and performance to improve product durability.

[0018] The limit-general experiment mentioned above specifically adopts a multi-parameter comprehensive performance limit test experiment, including a static strength limit experiment, a dynamic performance limit experiment, an environmental adaptability limit experiment, a structural deformation limit experiment, and a material limit characteristic experiment.

[0019] The input of the stress intensity equation includes the parameters of the reinforcing rib and the stress state, and the output is the internal stress distribution of the reinforcing rib and the maximum equivalent stress.

[0020] Furthermore, the input of the deformation limit equation includes the parameters of the reinforcing ribs, the size of the external load, and the container deformation constraint conditions, and the output is the maximum deformation amount and deformation distribution of the container.

[0021] Furthermore, the input of the material fatigue equation includes the reinforcement rib parameters, cyclic load frequency, stress amplitude, material fatigue limit, and ambient temperature, and the output is the fatigue life and damage degree of the reinforcement rib.

[0022] Furthermore, the input of the structural stability equation includes reinforcement rib parameters, container geometric dimensions, Poisson's ratio, temperature variation range, and external constraints, and the output is the critical instability load and stability coefficient of the structure.

[0023] Furthermore, the input of the container load-bearing capacity equation includes the overall geometric dimensions of the container, reinforcement rib parameters, material strength limit, safety factor, ambient temperature, and corrosive medium influence factors, and the output is the maximum allowable loading mass and safe load limit of the container.

[0024] Furthermore, the input of the injection molding temperature control equation includes the overall geometric dimensions of the container, the parameters of the reinforcing ribs, the temperature physical property parameters of the material, and the ambient temperature, and the output includes the optimal injection molding temperature range, the temperature gradient distribution, and the temperature uniformity coefficient.

[0025] Furthermore, the input of the mold cavity design equation includes the overall geometric dimensions of the container, the parameters of the reinforcing ribs, the material shrinkage rate, and the cavity surface roughness parameters, and the output includes the cavity precise dimension compensation value, the cavity surface design parameters, and the demoulding angle.

[0026] Furthermore, the input of the surface treatment process equation includes the overall geometric dimensions of the container, reinforcement rib parameters, surface roughness requirements, operating environment conditions, and surface treatment process type, and the output includes surface treatment process parameters, surface treatment effect evaluation indicators, and wear resistance performance prediction.

[0027] Furthermore, the static strength limit test includes a uniaxial static tensile test and a multi-axial composite load static test. The uniaxial static tensile test is used to collect the maximum tensile strength, yield strength, elastic modulus, Poisson's ratio, fracture strain, and characteristic points of the stress-strain curve; the multi-axial composite load static test is used to collect the ultimate strength under composite loads in different directions; multi-directional stress coupling effect; critical instability load of the structure; and stress distribution uniformity coefficient.

[0028] The dynamic performance limit test includes an impact load fatigue test and a vibration and impact combined test. The impact load fatigue test is used to collect the maximum stress under the impact load, the impact energy absorption capacity, the structural integrity after the impact, and the impact damage evaluation index; the vibration and impact combined test is used to collect the vibration frequency-stress response relationship, the vibration amplitude and structural deformation relationship, the fatigue life under the composite dynamic load, and the structural dynamic response characteristics;

[0029] The environmental adaptability limit test includes a low temperature limit performance test, a high temperature limit performance test, and a wet-heat alternating environmental adaptability test. The low temperature limit performance test is used to collect the change in material toughness, low temperature brittle transition temperature, low temperature mechanical performance degradation rate, and structural size change at low temperature; the high temperature limit performance test is used to collect the creep rate, thermal deformation temperature, high temperature stress relaxation characteristics, and thermal expansion coefficient of the material at high temperature; the wet-heat alternating environmental adaptability test is used to collect the influence of humidity on material strength, dimensional stability under wet-heat environment, changes in material dielectric properties, and the relationship between the number of wet-heat cycles and performance;

[0030] The structural deformation limit experiment includes a static deformation test and a dynamic deformation response test. The static deformation test includes the maximum static deformation, deformation anisotropy coefficient, linear and nonlinear deformation ranges, and residual deformation rate; the dynamic deformation response test includes dynamic deformation rate, deformation energy dissipation coefficient, dynamic response frequency characteristics, and structural damping characteristics.

[0031] The material limit property experiment includes creep performance test and fracture toughness test. The creep performance test is used to collect creep rate, creep limit strain, and creep activation energy; the fracture toughness test is used to collect critical stress intensity factor of crack extension, fracture energy, crack initiation and extension characteristics, and microscopic fracture morphology analysis.

[0032] The further related equations are described as follows:

[0033] The specific expression of the stress intensity equation is as follows:

[0034] ;

[0035] In the formula, is the equivalent stress distribution function; is the stiffener parameter vector, including , representing height, thickness, tilt angle and quantity respectively; is the stress state vector, including static load, dynamic load and environmental stress; is the material parameter vector, including elastic modulus, Poisson’s ratio and yield strength; is the stress tensor component; is the stress concentration factor; is the error term;

[0036] Parameter acquisition method:

[0037] 1. Obtained through static strength limit test of limit-general test:

[0038] high : Measured by multi-axial combined load static test;

[0039] thickness : Determined by uniaxial static tensile test;

[0040] Tilt Angle : Measured by structural deformation limit experiment;

[0041] quantity :Iterative optimization based on finite element analysis software;

[0042] 2. How to obtain:

[0043] Static load: multi-axial composite load static test;

[0044] Dynamic load: impact load fatigue test and vibration and impact combined test;

[0045] 3. How to obtain:

[0046] Elastic modulus: uniaxial static tensile test;

[0047] Poisson's ratio: static strength limit test;

[0048] Yield strength: uniaxial static tensile test;

[0049] The principle of constructing the stress intensity equation includes: using the stress concentration factor Consider the effect of geometric irregularities on stress distribution; introduce partial derivatives Describe the change of stress in different directions; express the multi-parameter coupling relationship through vectors; error term reflects the deviation between experimental measurements and theoretical models;

[0050] The specific expression of the deformation limit equation is as follows:

[0051] ;

[0052] In the formula, is the maximum deformation; is the deformation displacement function; is the geometry and force coupling function; is the stiffener parameter vector; is the external load vector; is the constraint coefficient; is the error term;

[0053] Parameter acquisition method:

[0054] 1. Obtained through static deformation test in structural deformation limit experiment;

[0055] The test steps include: a. applying progressive load and recording the deformation process; b. using a high-precision displacement sensor to measure the maximum deformation; c. repeating multiple tests to obtain the average value;

[0056] Determined using dynamic deformation response testing;

[0057] Experimental steps: a. Set dynamic loads of different frequencies and amplitudes; b. Use a laser vibrometer to record displacement changes; c. Fit the displacement-time curve;

[0058] The specific expression of the material fatigue equation is as follows:

[0059] ;

[0060] In the formula, is the fatigue life; is the stress amplitude; is the cyclic load frequency; is the ambient temperature; is the empirical coefficient; is the gas constant;

[0061] Parameter acquisition method:

[0062] Determined by impact load fatigue testing;

[0063] Experimental steps: a. Set different stress amplitudes and frequencies; b. Record the number of failure cycles of the specimen; c. Draw the SN curve;

[0064] Determined by uniaxial static tensile test measurement and multi-axial combined load static test;

[0065] Measured by combined vibration and shock test and recorded by spectrum analyzer;

[0066] Empirical coefficient Fitting through multiple sets of fatigue tests; using least squares method or nonlinear fitting algorithm;

[0067] The specific expression of the structural stability equation is as follows:

[0068] ;

[0069] In the formula, is the critical buckling load; is the elastic modulus; is the section moment of inertia; is the constraint coefficient; is the structure length; is the temperature-dependent Poisson’s ratio; is the disturbance frequency;

[0070] Parameter acquisition method:

[0071] Obtained through the critical instability load test of the structure in the static strength limit experiment;

[0072] Experimental steps: a. Gradually increase the load; b. Record the structural mutation point; c. Take the average value after multiple tests;

[0073] The slope of the stress-strain curve was calculated by measuring the uniaxial static tensile test;

[0074] The moment of inertia of the section is obtained by measuring it with a geometric measuring instrument; it is calculated using computer-aided design (CAD) software;

[0075] Passed low temperature and high temperature extreme performance test measurements; recorded the change of Poisson's ratio at different temperatures;

[0076] The specific expression of the container bearing capacity equation is as follows:

[0077] ;

[0078] In the formula, is the maximum permissible loading mass; is the ultimate strength of the material; is the cross-sectional area; is the safety factor; is the temperature correction function; is the corrosion factor vector; is the corrosion sensitivity coefficient;

[0079] Parameter acquisition method:

[0080] Obtained through static strength limit experimental measurement and determined by multi-axial composite load static test;

[0081] Obtained through uniaxial static tensile test measurement to determine the ultimate strength of the material;

[0082] The cross-sectional area is measured by a precision measuring instrument and calculated by CAD software;

[0083] Based on multiple fatigue tests and failure analysis; determined by comprehensive consideration of material properties and use environment;

[0084] Pass the wet and hot alternating environment adaptability test and obtain including chemical medium corrosiveness test;

[0085] The specific expression of the injection molding temperature control equation is as follows:

[0086] ;

[0087] In the formula, is the optimal injection temperature; is the melting point of the material; is the temperature adjustment range; is the container height; is the cavity volume; is the error term;

[0088] The specific expression of the mold cavity design equation is as follows:

[0089] ;

[0090] In the formula, is the cavity compensation length; is the initial design length; is the shrinkage correction factor; is the geometric factor; is the surface roughness correction value;

[0091] The specific expression of the surface treatment process equation is as follows:

[0092] ;

[0093] In the formula, is the surface roughness; is the surface treatment parameter vector; For processing time; For processing speed; is the parameter weight; is the empirical coefficient.

[0094] Compared with the prior art, the method for manufacturing a material storage plastic container with reinforcing ribs provided by the present invention has the following beneficial effects:

[0095] First, multiple annular reinforcement ribs are set on the container body. This innovative structure greatly improves the container's ability to resist deformation. The reinforcement ribs can effectively disperse external loads and reduce stress concentration in the container body, thereby reducing the risk of deformation and damage. When subjected to dynamic loads such as impact and extrusion, the reinforcement ribs can also absorb part of the impact energy, further improving the container's resistance to damage. At the same time, the setting of the reinforcement ribs also optimizes the overall mechanical properties of the container, improves the deformation characteristics, and ensures the shape stability of the container under high load conditions.

[0096] Secondly, by systematically optimizing the design of the reinforcement rib parameters, including materials, quantity, spacing, height, etc., the load-bearing capacity and service life of the container can be maximized. The optimized reinforcement rib parameters can not only effectively resist static and dynamic loads, but also significantly improve the adaptability of the container in harsh environments such as high temperature, low temperature, and humidity. This greatly enhances the applicability of the container in special scenarios such as chemicals and food.

[0097] Finally, the present invention also innovates the manufacturing process of plastic containers. By establishing injection temperature control equations, mold cavity design equations, and surface treatment process equations, etc., precise control of the production process is achieved. This ensures that in actual mass production, the manufactured containers can truly meet the optimized reinforcement rib parameter requirements and thus exert excellent overall performance.

[0098] In summary, the manufacturing method of the material storage plastic container with reinforcing ribs proposed in the present invention has significantly improved the key indicators such as load-bearing capacity, deformation resistance, and service life compared with the prior art. It meets the urgent needs of the industry, warehousing and other fields for high-performance plastic containers and solves the problems of insufficient load-bearing capacity, deformation resistance and service life of the existing material storage plastic containers. BRIEF DESCRIPTION OF THE DRAWINGS

[0099] Figure 1 It is a structural schematic diagram of a material storage plastic container with reinforcing ribs in the present invention;

[0100] Figure 2 A flow chart of the method provided by the present invention;

[0101] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0102] 1. Container body; 2. Container mouth; 3. Annular reinforcement rib. DETAILED DESCRIPTION

[0103] In order to make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0104] like Figure 1 , which is a schematic diagram of the structure of a material storage plastic container with reinforcing ribs, comprising a container body 1 and a container mouth 2, wherein the container body 1 is a cylinder, and a plurality of annular reinforcing ribs 3 are arranged on the outer wall of the container body, and the container mouth 2 is a through-cylindrical structure, and the lower part of the container mouth 2 is connected to the top of the container body 1, and the container body 1, the container mouth 2 and the plurality of annular reinforcing ribs 3 are integrally formed; Figure 2 The flowchart of the manufacturing method provided by the present invention is shown below. The specific implementation methods of the steps in the method of the present invention are described in detail below:

[0105] The specific implementation of step S10 is to make an original sample container and obtain initial experimental data through an extreme-general experiment. First, a batch of original sample containers are made, including a container body and a reinforcing rib structure. Then, a multi-parameter comprehensive performance extreme test experiment is used to conduct a comprehensive test and data collection on these original samples. Specifically, the following sub-steps are included:

[0106] Sub-step 1: Conduct static strength limit test. This test includes uniaxial static tensile test and multiaxial composite load static test. Uniaxial static tensile test is used to measure the material's maximum tensile strength, yield strength, elastic modulus, Poisson's ratio, fracture strain and other performance parameters. Multiaxial composite load static test is used to determine the ultimate strength under different load directions, multi-directional stress coupling effect and critical instability load of the structure. These parameters will be used as inputs to the stress intensity equation and the structural stability equation.

[0107] Sub-step 2: Conduct dynamic performance limit test. This experiment includes impact load fatigue test and vibration and impact combined test. Impact load fatigue test is used to measure parameters such as maximum stress under impact load, impact energy absorption capacity, and structural integrity after impact, providing input for material fatigue equation. Vibration and impact combined test is used to measure parameters such as vibration frequency-stress response relationship, vibration amplitude and structural deformation relationship, fatigue life under composite dynamic load, and structural dynamic response characteristics.

[0108] Sub-step 3: Conduct environmental adaptability limit test. This experiment includes low temperature limit performance test, high temperature limit performance test and wet heat alternating environmental adaptability test. The low temperature limit performance test is used to measure parameters such as the toughness change of the material at low temperature, the low temperature brittle transition temperature, the low temperature mechanical performance degradation rate and the structural size change. The high temperature limit performance test is used to measure parameters such as the creep rate, heat deformation temperature, high temperature stress relaxation characteristics and thermal expansion coefficient of the material at high temperature. The wet heat alternating environmental adaptability test is used to measure parameters such as the effect of humidity on material strength, dimensional stability in wet heat environment, changes in material dielectric properties and the relationship between the number of wet heat cycles and performance. These parameters will be used as inputs to the stress intensity equation, structural stability equation and container bearing capacity equation.

[0109] Sub-step 4: Conduct structural deformation limit test. This experiment includes static deformation test and dynamic deformation response test. The static deformation test is used to measure parameters such as maximum static deformation, deformation anisotropy coefficient, linear and nonlinear deformation range, and residual deformation rate. The dynamic deformation response test is used to measure parameters such as dynamic deformation rate, deformation energy dissipation coefficient, dynamic response frequency characteristics, and structural damping characteristics. These parameters will be used as inputs to the deformation limit equation.

[0110] Sub-step 5: Conduct material limit property experiments. This experiment includes creep performance test and fracture toughness test. Creep performance test is used to measure material parameters such as creep rate, creep limit strain and creep activation energy. Fracture toughness test is used to measure material parameters such as critical stress intensity factor of crack extension, fracture energy, crack initiation and extension characteristics and microscopic fracture morphology. These parameters will provide input for material fatigue equation and container load-bearing capacity equation.

[0111] Through the limit-general experiments in the above five sub-steps, an initial experimental data set including stress distribution data, deformation data, material fatigue data, structural stability data, and load-bearing capacity data was obtained. These data provide the basis for constructing the stiffener parameter equation group in the subsequent steps.

[0112] The specific implementation of step S20 is to calculate preliminary rib parameters based on initial experimental data. First, the obtained initial experimental data is used to construct a set of rib parameter equations, including stress intensity equations, deformation limit equations, material fatigue equations, structural stability equations, and container load-bearing capacity equations. Then, preliminary rib parameters are calculated based on these equations, including the material parameters, quantity, spacing, height, thickness, and inclination angle of the ribs. These parameters will serve as initial inputs for finite element analysis and experimental optimization in subsequent steps.

[0113] The specific implementation method of step S30 is to adjust and optimize the preliminary reinforcing rib parameters using finite element analysis software. First, a finite element model of the container is established based on the preliminary reinforcing rib parameters obtained in step S20. On this basis, pre-processing work such as meshing, boundary condition setting and material parameter definition is performed. Then, through the method of iterative optimization and parameter sensitivity analysis, the preliminary reinforcing rib parameters are gradually adjusted until the optimized reinforcing rib parameters are obtained. This process requires repeated adjustment of the geometric dimensions, material properties and other parameters of the reinforcing ribs until the performance requirements such as reasonable stress distribution, small deformation and stable structure are met.

[0114] The specific implementation method of step S40 is to use the augmented Latin hypercube experimental design method to generate multiple candidate solutions based on the optimized stiffener parameters. The augmented Latin hypercube experimental design is an efficient multi-factor experimental design method that can comprehensively examine the influence of various factors within a limited number of experiments. Here, the geometric dimensions and material properties of the stiffener are used as experimental factors, and the method is used to generate multiple sets of candidate solutions with different parameters. These candidate solutions will be evaluated and screened in the next step.

[0115] The specific implementation method of step S50 is to make a small batch of prototype samples and conduct comprehensive performance testing. First, according to the multiple candidate reinforcement rib parameter schemes generated in step S40, a corresponding small batch of prototype sample containers are made. Then, a series of performance tests are conducted on these prototype sample containers as follows:

[0116] Sub-step 1: Static load test. Through uniaxial and multi-axial static loading tests, the stress distribution, deformation, structural stability and other indicators of the container under different loads are measured to provide a basis for the verification of the stress intensity equation and the deformation limit equation.

[0117] Sub-step 2: Dynamic fatigue testing. Through impact load fatigue test and vibration and impact combined test, the fatigue life and dynamic response characteristics of the container under dynamic load are measured to verify the accuracy of the material fatigue equation.

[0118] Sub-step 3: Environmental adaptability performance test. This includes tests in low temperature, high temperature and hot and humid environments, measuring the material performance changes, dimensional stability and structural reliability of the container in different temperature and humidity environments, and providing verification data for the stress intensity equation, structural stability equation and temperature and corrosion factors of the container bearing capacity equation.

[0119] Sub-step 4: Impact resistance test: Through the drop hammer impact test, the energy absorption capacity, residual strength and damage degree of the container under the impact load are measured to supplement and improve the data of the dynamic performance limit experiment.

[0120] Sub-step 5: Chemical media corrosion test. Immerse the container in various chemical media that simulate the use environment, measure the material's strength reduction, surface morphology changes, dimensional stability and other indicators, and provide a basis for determining the corrosion factor in the container's load-bearing capacity equation.

[0121] Sub-step 6: Temperature adaptability test. Static and dynamic load tests are performed on the container in low and high temperature environments to measure the container's load-bearing capacity, deformation characteristics, dynamic response and other indicators under different temperature conditions, providing support for the determination of temperature factors in the stress intensity equation, deformation limit equation and container load-bearing capacity equation.

[0122] Sub-step 7: Sealing performance test. Through internal pressure test and vacuum test, measure the sealing performance of the container under closed conditions, including the maximum sealing pressure, the trend of sealing performance over time, and leakage rate, etc., to ensure that the container is reliably sealed in actual use.

[0123] Sub-step 8: Compression deformation test. Under static and dynamic loads, measure the maximum compression deformation, compression strain, residual deformation and other indicators of the container body and reinforcing rib structure to meet the deformation control requirements in actual use.

[0124] Through the above comprehensive performance testing, the candidate reinforcement rib parameters with the best comprehensive performance can be selected as the final target parameters. These performance data will also provide a basis for the setting of process parameters in subsequent steps.

[0125] The specific implementation of step S60 is to set the production process according to the target reinforcement rib parameters using a preset process parameter empirical equation group, which includes an injection temperature control equation, a mold cavity design equation, and a surface treatment process equation.

[0126] The input of the injection molding temperature control equation includes the overall geometric dimensions of the container, the parameters of the reinforcing ribs, the temperature physical properties of the material, and the ambient temperature, and the output includes the optimal injection molding temperature range, the temperature gradient distribution, and the temperature uniformity coefficient, etc. These parameters will ensure that the plastic material can be uniformly melted and accurately formed during the injection molding process.

[0127] The input of the mold cavity design equation includes the overall geometric dimensions of the container, the parameters of the reinforcing ribs, the material shrinkage rate, and the surface roughness parameters of the cavity, and the output includes the precise size compensation value of the cavity, the surface design parameters of the cavity, and the demoulding angle. These parameters will optimize the mold cavity design and ensure the dimensional accuracy and surface quality of the final product.

[0128] The input of the surface treatment process equation includes the overall geometric dimensions of the container, the parameters of the reinforcing ribs, the surface roughness requirements, the use environment conditions and the type of surface treatment process, and the output includes the surface treatment process parameters, the surface treatment effect evaluation index and the wear resistance prediction. These parameters will optimize the surface quality and use performance of the container and improve the durability of the product.

[0129] By applying these process parameter empirical equations, it can be ensured that the target reinforcing rib parameters can be effectively achieved in actual production and the performance requirements of the container can be met.

[0130] The specific implementation method of step S70 is to set the parameter control of the production process, the production line environment management and the quality control, so as to finally realize the large-scale production of the material storage plastic container with reinforcing ribs.

[0131] First of all, production parameters need to be strictly controlled. This includes precise regulation of process parameters such as injection temperature, injection pressure, cooling time, etc. to ensure the consistency of each product. At the same time, key equipment such as molds and extruders need to be regularly maintained and calibrated to ensure the stability of equipment performance.

[0132] Secondly, the production line environment needs to be fully managed. This includes the control of factors such as workshop temperature and humidity, cleanliness, vibration and noise, as well as the storage environment management and control of raw materials, semi-finished products and finished products to ensure the stability of production conditions.

[0133] Finally, a sound quality control system needs to be established. This includes raw material inspection, process monitoring, finished product inspection and other links. For key performance indicators, strict testing standards and sampling inspection plans need to be formulated to ensure the consistency and reliability of product quality. At the same time, a traceability and disposal mechanism for unqualified products needs to be established to record and promptly handle various quality issues throughout the process.

[0134] Specifically, the principle of the present invention is:

[0135] 1. Multiple annular reinforcing ribs are set on the outer wall of the container body. These reinforcing ribs can effectively disperse the external load, reduce the stress concentration of the container body, and thus reduce the risk of deformation and damage. When subjected to dynamic loads such as impact and extrusion, the reinforcing ribs can also absorb part of the impact energy, further improving the anti-destructiveness of the container. At the same time, the setting of the reinforcing ribs also optimizes the overall mechanical properties of the container, improves the deformation characteristics, and ensures the shape stability of the container under high load conditions.

[0136] 2. Through systematic optimization of the geometric parameters and material properties of the reinforcement ribs, the load-bearing capacity and service life of the container are maximized. The optimized reinforcement rib parameters can not only effectively resist static and dynamic loads, but also significantly improve the adaptability of the container in harsh environments such as high temperature, low temperature, and humidity. This ensures the applicability of the container in special scenarios such as chemicals and food.

[0137] 3. In terms of manufacturing process, the present invention establishes injection temperature control equations, mold cavity design equations, and surface treatment process equations, etc., to achieve precise control of the production process. This ensures that in actual mass production, the manufactured containers can truly meet the optimized reinforcement rib parameter requirements, and thus exert excellent overall performance. From the perspective of engineering mechanics, the setting of reinforcement ribs can effectively improve the stress distribution state of the container body, reduce stress concentration, and improve the overall anti-deformation ability. The optimized reinforcement rib parameters, such as height, thickness, tilt angle, etc., will affect the load-bearing characteristics of the container. Through finite element analysis and other means, the optimal combination of reinforcement rib parameters can be found, so that the container can maintain good structural stability and performance under various loads. At the same time, precise control of the manufacturing process is also the key to ensuring container performance. The optimization of process parameters such as injection temperature, mold design, and surface treatment can effectively avoid deviations in actual production and ensure the consistency and reliability of each product.

[0138] The following is an example of a specific application scenario of the present invention: This example is directed to the development process of a 200L large plastic storage container, which is mainly used to store chemical raw materials. The container body is made of high-density polyethylene (HDPE) material, which has excellent chemical stability and mechanical properties. The container body is a cylindrical structure with a height of 800mm, an inner diameter of 600mm, and a wall thickness of 8mm. The container mouth adopts the standard DN150 specification, which is a through cylindrical structure with a height of 100mm, an inner diameter of 150mm, and a wall thickness of 6mm. The specific development process of the container is described in detail below.

[0139] Initial sample production and extreme universal test phase. First, three groups of original samples were produced for extreme universal tests. The samples were manufactured using injection molding technology, and the initial reinforcement ribs were designed to be 6 evenly distributed annular reinforcement ribs, each with a height of 30 mm, a thickness of 6 mm, and an inclination angle of 15 degrees. The initial experimental data obtained through the extreme universal test are shown in the following table.

[0140] Table 1 Static strength limit test data:

[0141]

[0142] Table 2 Dynamic performance limit experimental data:

[0143]

[0144] Calculation stage of the stiffener parameter equation group. Based on the limit universal experimental data, the stiffener parameter equation group is established. Substituting the experimental data into each equation, the following calculation results are obtained.

[0145] The calculation results of the stress intensity equation show that under the condition of a rated load of 200kg, the maximum equivalent stress of the container body is 18.3MPa, which is mainly concentrated at the connection between the reinforcing rib and the container body. The calculation of the deformation limit equation shows that under the same load, the maximum radial deformation of the container is 2.8mm and the axial deformation is 1.5mm. The material fatigue equation predicts that under standard use conditions (loading and unloading cycle once a week), the theoretical service life of the container can reach more than 15 years. The structural stability equation calculates that the critical instability load is 850kg, which has sufficient stability margin. The safe bearing capacity determined by the container bearing capacity equation is 250kg, which meets the use requirements.

[0146] Initial rib parameter determination stage: Through the calculation of the equation group, the initial rib parameters are obtained as shown in the following table.

[0147] Table 3 Preliminary reinforcement rib parameters:

[0148]

[0149] Finite element analysis optimization stage. The container model was established using ANSYS Workbench software, and the Solid186 unit was used for meshing, with a total of 286,752 mesh units. The boundary conditions were set as fixed support at the bottom and a 200kg uniform load applied to the top. The material parameters were experimentally measured. After 20 rounds of iterative optimization calculations, the optimized rib parameters were obtained.

[0150] Table 4 Optimized strengthening rib parameters:

[0151]

[0152] Augmented Latin Hypercube Experimental Design Phase. Based on the optimized rib parameters, 27 candidate rib parameter combinations were designed using the augmented Latin Hypercube Experimental Design method. Each group of parameters was set at a variation range of ±5% and ±10% near the optimized value. 27 groups of small batch samples were made, with 3 samples in each group, for a total of 81 samples for performance testing.

[0153] Table 5 Performance test results (partial representative data):

[0154]

[0155] Production process parameter setting stage. According to the process parameter empirical equation group, the production process is set in combination with the target parameters. The injection temperature control equation calculates that the optimal injection temperature range is 235-245℃. The mold cavity design equation determines that the cavity compensation value is 1.8%. The surface treatment process equation calculates the surface roughness target value Ra=0.8μm.

[0156] Table 6 Injection molding process parameter settings:

[0157]

[0158] Table 7 Mould design parameters:

[0159]

[0160] Parameter control stage of large-scale production. Establish a complete production process control system, including raw materials, production process and finished product quality control. Raw material control adopts batch sampling and testing system, and each batch is sampled for key indicators such as density, melt index, moisture, etc. Production process control adopts online monitoring system to record injection molding parameters in real time. Finished product quality control adopts AQL1.5 standard for sampling inspection.

[0161] Table 8 Production process control parameters:

[0162]

[0163] Table 9 Finished product quality sampling standards:

[0164]

[0165] After the above development process, the large-scale production of 200L large plastic storage containers was successfully achieved. All performance indicators of the product meet the design requirements and have been successfully applied in the field of chemical raw material storage. The production process is stable and controllable, and the product quality pass rate reaches more than 99.8%. In actual use, the container shows excellent bearing capacity, structural stability and durability, and is widely recognized by users. Through this embodiment, the feasibility and practical value of the method of the present invention are fully verified.

[0166] The innovation of this embodiment is that through a systematic parameter optimization method, the problems of large plastic containers being easily deformed and having a short service life during use are successfully solved. The product performance is significantly improved through precise rib parameter design and strict process control. Practice has proved that the products developed using the method of the present invention have higher reliability and durability, and provide an effective technical solution for the design and manufacture of plastic containers.

[0167] It should be noted that the explanations of the variables involved in the present invention are shown in Table 10 below:

[0168] Table 10 Variable explanation table

[0169]

[0170] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A method for manufacturing a material storage plastic container with reinforcing ribs, characterized in that: The material storage plastic container comprises a container body and a container mouth, wherein the container body is a cylinder, a plurality of annular reinforcing ribs are arranged on the outer wall of the container body, the container mouth is a through-cylindrical structure, the lower part of the container mouth is connected to the top of the container body, and the container body, the container mouth and the plurality of annular reinforcing ribs are integrally formed; the manufacturing method specifically comprises the following steps: S10, making an original sample of the container, obtaining initial experimental data of the container body and the reinforcing rib structure through an extreme-universal experiment, the initial experimental data including stress distribution data, deformation data, material fatigue data, structural stability data and bearing capacity data, and constructing a group of parameter equations of the reinforcing rib of the material storage plastic container based on the initial experimental data; S20, calculating preliminary reinforcement rib parameters based on the reinforcement rib parameter equation group, wherein the reinforcement rib parameters include material parameters, quantity, spacing, height, thickness, and inclination angle of the reinforcement ribs; S30, using finite element analysis software to establish a container model according to the preliminary reinforcement rib parameters, and adjusting the preliminary reinforcement rib parameters by means of meshing, boundary condition setting, material parameter definition, iterative optimization, and parameter sensitivity analysis to obtain optimized reinforcement rib parameters; S40, using an augmented Latin hypercube experimental design method to obtain a plurality of candidate stiffener parameters based on the optimized stiffener parameters; S50, producing a small batch of prototype samples based on the multiple candidate reinforcement rib parameters, and performing performance tests, including static load test, dynamic fatigue test, environmental adaptability test, impact resistance test, chemical medium corrosion test, temperature adaptability test, sealing performance test, and compressive deformation test, and selecting the candidate reinforcement rib parameters with the best comprehensive performance as the target parameters; S60, based on the target parameters, using a preset process parameter empirical equation group to set the production process, specifically including injection molding temperature control, mold cavity design and surface treatment process, to ensure that the target parameters can be effectively achieved in actual production; S70, setting the production parameter control in the production process, as well as the production line environment management and quality control, and finally realizing the large-scale production of the material storage plastic container with reinforcing ribs; The stiffening rib parameter equation group includes a stress intensity equation, a deformation limit equation, a material fatigue equation, a structural stability equation, and a container bearing capacity equation; The stress intensity equation is used to evaluate the load-bearing capacity and damage resistance of the stiffener; The deformation limit equation is used to determine the shape stability of the container under different loads; The material fatigue equation is used to predict the structural reliability of the container in long-term use; The structural stability equation is used to evaluate the overall stability of the container structure; The container load-bearing capacity equation is used to determine the rated service performance of the container; Wherein, the process parameter empirical equation group includes injection temperature control equation, mold cavity design equation and surface treatment process equation; The injection molding temperature control equation is used to determine the precise temperature control strategy during the injection molding process to ensure uniform melting and molding quality of the plastic material; The mold cavity design equation is used to optimize the mold cavity design to ensure the dimensional accuracy and surface quality of the final product; The surface treatment process equation is used to optimize the surface quality and performance of the container and improve the durability of the product; The limit-general experiment mentioned above specifically adopts a multi-parameter comprehensive performance limit test experiment, including a static strength limit experiment, a dynamic performance limit experiment, an environmental adaptability limit experiment, a structural deformation limit experiment, and a material limit characteristic experiment.

2. The method for manufacturing a material storage plastic container with reinforcing ribs according to claim 1, characterized in that: The input of the stress intensity equation includes the parameters of the reinforcing rib and the stress state, and the output is the internal stress distribution of the reinforcing rib and the maximum equivalent stress.

3. The method for manufacturing a material storage plastic container with reinforcing ribs according to claim 2, characterized in that: The input of the deformation limit equation includes the parameters of the reinforcing ribs, the size of the external load, and the container deformation constraint conditions, and the output is the maximum deformation amount and deformation distribution of the container.

4. The method for manufacturing a material storage plastic container with reinforcing ribs according to claim 3, characterized in that: The input of the material fatigue equation includes the parameters of the reinforcing rib, the cyclic load frequency, the stress amplitude, the material fatigue limit, and the ambient temperature, and the output is the fatigue life and damage degree of the reinforcing rib.

5. The method for manufacturing a material storage plastic container with reinforcing ribs according to claim 4, characterized in that: The input of the structural stability equation includes the parameters of the reinforcing ribs, the geometric dimensions of the container, the Poisson's ratio, the temperature variation range, and the external constraint conditions, and the output is the critical instability load and the stability coefficient of the structure.

6. The method for manufacturing a material storage plastic container with reinforcing ribs according to claim 5, characterized in that: The input of the container load-bearing capacity equation includes the overall geometric dimensions of the container, the parameters of the reinforcing ribs, the material strength limit, the safety factor, the ambient temperature of use, and the influence factors of the corrosive medium, and the output is the maximum allowable loading mass and the safe load limit of the container.

7. The method for manufacturing a material storage plastic container with reinforcing ribs according to claim 6, characterized in that: The input of the injection molding temperature control equation includes the overall geometric dimensions of the container, the parameters of the reinforcing ribs, the temperature physical performance parameters of the material, and the ambient temperature, and the output includes the optimal injection molding temperature range, the temperature gradient distribution, and the temperature uniformity coefficient.

8. The method for manufacturing a material storage plastic container with reinforcing ribs according to claim 7, characterized in that: The input of the mold cavity design equation includes the overall geometric dimensions of the container, the parameters of the reinforcing ribs, the material shrinkage rate, and the surface roughness parameters of the cavity, and the output includes the precise dimension compensation value of the cavity, the surface design parameters of the cavity, and the demoulding angle.

9. The method for manufacturing a material storage plastic container with reinforcing ribs according to claim 8, characterized in that: The input of the surface treatment process equation includes the overall geometric dimensions of the container, the parameters of the reinforcing ribs, the surface roughness requirements, the use environment conditions, and the type of surface treatment process, and the output includes the surface treatment process parameters, the surface treatment effect evaluation index, and the wear resistance prediction.

10. The method for manufacturing a material storage plastic container with reinforcing ribs according to claim 9, characterized in that: The static strength limit test includes a uniaxial static tensile test and a multi-axial composite load static test. The uniaxial static tensile test is used to collect the maximum tensile strength, yield strength, elastic modulus, Poisson's ratio, fracture strain, and characteristic points of the stress-strain curve; the multi-axial composite load static test is used to collect the ultimate strength under composite loads in different directions; multi-directional stress coupling effect; Critical instability load of the structure; uniformity coefficient of stress distribution; The dynamic performance limit test includes an impact load fatigue test and a vibration and impact combined test. The impact load fatigue test is used to collect the maximum stress under the impact load, the impact energy absorption capacity, the structural integrity after the impact, and the impact damage evaluation index; the vibration and impact combined test is used to collect the vibration frequency-stress response relationship, the vibration amplitude and structural deformation relationship, the fatigue life under the composite dynamic load, and the structural dynamic response characteristics; The environmental adaptability limit test includes a low temperature limit performance test, a high temperature limit performance test, and a wet-heat alternating environmental adaptability test. The low temperature limit performance test is used to collect the change in material toughness, low temperature brittle transition temperature, low temperature mechanical performance degradation rate, and structural size change at low temperature; the high temperature limit performance test is used to collect the creep rate, thermal deformation temperature, high temperature stress relaxation characteristics, and thermal expansion coefficient of the material at high temperature; the wet-heat alternating environmental adaptability test is used to collect the influence of humidity on material strength, dimensional stability under wet-heat environment, changes in material dielectric properties, and the relationship between the number of wet-heat cycles and performance; The structural deformation limit experiment includes a static deformation test and a dynamic deformation response test. The static deformation test includes a maximum static deformation, a deformation anisotropy coefficient, a linear and nonlinear deformation range, and a residual deformation rate. The dynamic deformation response test includes dynamic deformation rate, deformation energy dissipation coefficient, dynamic response frequency characteristics, and structural damping characteristics; The material limit property experiment includes creep performance test and fracture toughness test. The creep performance test is used to collect creep rate, creep limit strain, and creep activation energy; the fracture toughness test is used to collect critical stress intensity factor of crack extension, fracture energy, crack initiation and extension characteristics, and microscopic fracture morphology analysis.

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