CN114379043B - Turbine die flow analysis method, turbine injection molding method and turbine - Google Patents
Turbine die flow analysis method, turbine injection molding method and turbine Download PDFInfo
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- CN114379043B CN114379043B CN202111635835.0A CN202111635835A CN114379043B CN 114379043 B CN114379043 B CN 114379043B CN 202111635835 A CN202111635835 A CN 202111635835A CN 114379043 B CN114379043 B CN 114379043B
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- 238000005206 flow analysis Methods 0.000 title claims abstract description 77
- 238000001746 injection moulding Methods 0.000 title claims abstract description 72
- 238000000034 method Methods 0.000 title claims abstract description 29
- 239000000463 material Substances 0.000 claims abstract description 48
- 238000002347 injection Methods 0.000 claims abstract description 28
- 239000007924 injection Substances 0.000 claims abstract description 28
- 239000013077 target material Substances 0.000 claims abstract description 23
- 238000012360 testing method Methods 0.000 claims abstract description 6
- 239000003365 glass fiber Substances 0.000 claims description 20
- 238000004458 analytical method Methods 0.000 claims description 18
- 229920002302 Nylon 6,6 Polymers 0.000 claims description 10
- 238000005211 surface analysis Methods 0.000 claims description 5
- 239000005083 Zinc sulfide Substances 0.000 claims description 3
- 239000003963 antioxidant agent Substances 0.000 claims description 3
- 230000003078 antioxidant effect Effects 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 239000012760 heat stabilizer Substances 0.000 claims description 3
- 239000002667 nucleating agent Substances 0.000 claims description 3
- 229910052984 zinc sulfide Inorganic materials 0.000 claims description 3
- DRDVZXDWVBGGMH-UHFFFAOYSA-N zinc;sulfide Chemical compound [S-2].[Zn+2] DRDVZXDWVBGGMH-UHFFFAOYSA-N 0.000 claims description 3
- 238000002474 experimental method Methods 0.000 abstract description 6
- 238000004088 simulation Methods 0.000 description 17
- 238000009826 distribution Methods 0.000 description 10
- 239000002994 raw material Substances 0.000 description 9
- 238000005336 cracking Methods 0.000 description 6
- 238000013461 design Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 239000000243 solution Substances 0.000 description 3
- 239000004677 Nylon Substances 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 238000009472 formulation Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229920001778 nylon Polymers 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/76—Measuring, controlling or regulating
- B29C45/7693—Measuring, controlling or regulating using rheological models of the material in the mould, e.g. finite elements method
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14631—Coating reinforcements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
- B29C2945/76—Measuring, controlling or regulating
- B29C2945/76929—Controlling method
- B29C2945/76973—By counting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/08—Blades for rotors, stators, fans, turbines or the like, e.g. screw propellers
- B29L2031/082—Blades, e.g. for helicopters
- B29L2031/085—Wind turbine blades
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The embodiment of the invention provides a die flow analysis method, a turbine injection molding method and a turbine, which comprise the steps of testing a target material for injection molding the turbine, obtaining material characteristic parameters of the target material, generating corresponding preset format files according to the material characteristic parameters, guiding the preset format files into a die flow analysis tool, guiding a 3D model of the turbine into the die flow analysis tool, setting injection parameters, carrying out die flow analysis on the 3D model of the turbine by the die flow analysis tool according to the preset format files and the injection parameters, obtaining a die flow analysis result, inputting corresponding parameters by adopting a die flow analysis mode, simulating the whole injection molding process of the turbine, analyzing the injection molding result, avoiding the problems of longer time consumption, low working efficiency and the like in the traditional mode, and reducing the time and money cost of actual experiments to a certain extent.
Description
Technical Field
The invention relates to the technical field of material processing, in particular to a die flow analysis method of a turbine, a turbine injection molding method and a turbine.
Background
At present, the produced plastic turbine can have the problems of blushing, warping, cracking and the like, and the series of problems are caused by uneven stress distribution during casting. However, there are many factors affecting the stress maldistribution, such as raw material formulation, material temperature, mold temperature, injection time, dwell time, and mold structural design. To solve such problems, attempts have been made in terms of raw material formulation, process conditions, mold structural design, and the like. In the past, experimental study on each factor was required, but such conventional methods are time-consuming and have low working efficiency.
Therefore, a new method for analyzing the stress distribution of the turbine is needed to solve the above problems.
Disclosure of Invention
In order to solve the problems in the prior art, the embodiment of the invention provides a turbine die flow analysis method, a turbine injection molding method and a turbine, so as to solve the problems of long time consumption, low working efficiency and the like in the prior art when the stress distribution of the turbine is analyzed.
In order to solve one or more of the technical problems, the application adopts the following technical scheme:
In a first aspect, a method of die flow analysis of a turbine is provided, the method comprising:
testing a target material for injection molding of a turbine, and obtaining material characteristic parameters of the target material;
Generating a corresponding preset format file according to the material characteristic parameters, and importing the preset format file into a die flow analysis tool;
Introducing the 3D model of the turbine into the die flow analysis tool, and setting injection molding parameters;
the die flow analysis tool performs die flow analysis on the 3D model of the turbine according to the preset format file and the injection molding parameters to obtain a die flow analysis result;
and updating the injection molding parameters according to the die flow analysis result.
Further, the die flow analysis result includes a stress analysis result, the turbine includes an insert structure, and updating the injection molding parameters according to the die flow analysis result includes:
and updating the angle value of the included angle between two adjacent surfaces of the boss edge of the insert structure in the injection molding parameters according to the stress analysis result.
Further, updating the angle value of the included angle between two adjacent faces of the boss edge of the insert structure in the injection molding parameter according to the stress analysis result includes:
and setting the angle value of the included angle between two adjacent surfaces of the boss edge of the insert structure to be more than 90 degrees and less than 180 degrees.
Further, the material characteristic parameter includes at least one of capillary viscosity, PVT, thermal conductivity, specific heat, poisson's ratio, and linear expansion coefficient of the material.
Further, the injection molding parameters include at least one of a mold temperature, a material temperature, an insert temperature, and an injection time.
Further, the die flow analysis tool performs die flow analysis on the 3D model of the turbine according to the preset format file and the injection molding parameters, and obtaining a die flow analysis result includes:
and the die flow analysis tool performs double-layer surface analysis on the 3D model of the turbine according to the preset format file and the injection molding parameters to obtain a die flow analysis result.
Further, the preset format file includes a UDB file.
Further, the target material comprises a glass fiber reinforced nylon 66 material, and the glass fiber reinforced nylon 66 material comprises the following components in percentage by weight:
62.6 to 84.5 percent of PA66, 15 to 35 percent of glass fiber, 0.1 to 0.5 percent of release agent, 0.1 to 0.5 percent of antioxidant, 0.1 to 0.5 percent of zinc sulfide, 0.1 to 0.4 percent of heat stabilizer and 0.1 to 0.5 percent of nucleating agent.
In a second aspect, there is provided a turbine injection molding method based on the above turbine die flow analysis method, the turbine injection molding method comprising:
and generating the turbine by utilizing the target material injection molding according to the updated injection molding parameters.
In a third aspect, a turbine is provided, the turbine being injection molded by the turbine injection molding method described above.
The technical scheme provided by the embodiment of the invention has the beneficial effects that:
The embodiment of the invention provides a die flow analysis method, a turbine injection molding method and a turbine, which comprise the steps of testing a target material for injection molding the turbine, obtaining material characteristic parameters of the target material, generating corresponding preset format files according to the material characteristic parameters, guiding the preset format files into a die flow analysis tool, guiding a 3D model of the turbine into the die flow analysis tool, setting injection parameters, carrying out die flow analysis on the 3D model of the turbine by the die flow analysis tool according to the preset format files and the injection parameters, obtaining a die flow analysis result, inputting corresponding parameters by adopting a die flow analysis mode, simulating the whole injection molding process of the turbine, analyzing the injection molding result, avoiding the problems of longer time consumption, low working efficiency and the like in the traditional mode, and reducing the time and money cost of actual experiments to a certain extent;
Further, according to the die flow analysis method, the turbine injection molding method and the turbine provided by the embodiment of the invention, the angle value of the included angle between the adjacent two surfaces of the boss edge of the insert structure is set to be more than 90 degrees and less than 180 degrees, so that the target material (namely the raw material) is injected from inside to outside along the outer surface of the insert, and the gap between the insert and the target material is preferentially filled, thereby reducing the occurrence probability of the angle effect, improving the orientation degree and uniformity of glass fiber distribution and avoiding the problem of turbine cracking;
Further, according to the die flow analysis method, the turbine injection molding method and the turbine provided by the embodiment of the invention, the die flow analysis tool is used for carrying out double-layer surface analysis on the 3D model of the turbine according to the preset format file and the injection molding parameters to obtain the die flow analysis result, so that inconsistent shrinkage caused by different temperatures of the front die and the rear die is avoided, and the accuracy of the analysis result is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of a method of modular flow analysis of a turbine provided by an embodiment of the present application;
fig. 2 is a flow chart of a turbo injection molding method according to an embodiment of the present application.
Fig. 3 to 13 are simulation results under different injection parameters according to the embodiment of the present application.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As described in the background art, in the prior art, when the influence factors of uneven stress distribution are analyzed by adopting a traditional mode, the problems of long experiment time consumption, low working efficiency and the like exist.
In order to solve the problems, the invention provides a novel method for analyzing the die flow of the turbine, which adopts a die flow analysis mode, inputs corresponding parameters, simulates the whole injection molding process, analyzes injection molding results, then makes corresponding adjustment on the parameters according to the analysis results, and finally designs a reasonable scheme according to actual equipment conditions, thereby solving the problems of cracking and the like in the injection molding turbine.
Example 1
Referring to fig. 1, the method for analyzing the die flow of the turbine provided by the embodiment of the invention comprises the following steps:
s101: testing a target material for injection molding of a turbine, and obtaining material characteristic parameters of the target material;
S102: generating a corresponding preset format file according to the material characteristic parameters, and importing the preset format file into a die flow analysis tool;
S103: introducing the 3D model of the turbine into the die flow analysis tool, and setting injection molding parameters;
S104: the die flow analysis tool performs die flow analysis on the 3D model of the turbine according to the preset format file and the injection molding parameters to obtain a die flow analysis result;
S105: and updating the injection molding parameters according to the die flow analysis result.
Specifically, in order to reduce the time consumption of an experiment for analyzing the cause of turbine cracking and improve the working efficiency, in the embodiment of the application, a mode of die flow analysis is adopted to perform simulation analysis on the injection molding process of the turbine. The mold flow analysis (moldflow) is to use data simulation software to complete the simulation of injection molding by a computer, simulate the injection molding process of a mold, obtain some data results, evaluate the feasibility of the scheme of the mold by the results, and perfect the design scheme of the mold and the design scheme of the product.
In the process of the die flow analysis, it is generally necessary to input material characteristic parameters (also referred to as material physical property data) of a material for an injection molded product, and therefore, it is necessary to test the material characteristic parameters of a target material for an injection molded turbine for subsequent use before a specific analysis.
Specifically, the material characteristic parameters obtained in the steps are fitted to generate corresponding preset format files, and then the preset format files are imported into a die flow analysis tool so that the die flow analysis tool can read and recognize the corresponding preset format files. It should be noted that in the embodiment of the present application, the die flow analysis tool includes, but is not limited to, moldflow, etc., and the user may select according to the actual requirement.
Specifically, a 3D model corresponding to the turbine to be analyzed is built, and then the 3D model is imported into a model flow analysis tool, and injection parameters are set. It should be noted that, in the embodiment of the present application, the specific manner adopted for establishing the 3D model is not limited, and the user may select according to the actual requirement.
As a preferred implementation manner, in the embodiment of the present invention, the die flow analysis result includes a stress analysis result, the turbine includes an insert structure, and updating the injection molding parameter according to the die flow analysis result includes:
and updating the angle value of the included angle between two adjacent surfaces of the boss edge of the insert structure in the injection molding parameters according to the stress analysis result.
Specifically, on one hand, because uneven stress distribution is a main cause of problems such as blushing, warping and cracking of a produced turbine during casting, on the other hand, when injection molding is performed, high-viscosity raw materials in a molten state are poor in fluidity, the raw materials are subjected to injection molding according to the sequence from the outer periphery of a cavity to the middle, and an angle effect is easy to occur at an included angle of two adjacent surfaces of the edge of a boss of an insert structure, so that stress concentration is directly caused, and glass fibers are uneven.
In an embodiment of the present invention, updating the angle value of the angle between two adjacent faces of the boss edge of the insert structure in the injection parameter according to the stress analysis result includes:
and setting the angle value of the included angle between two adjacent surfaces of the boss edge of the insert structure to be more than 90 degrees and less than 180 degrees.
Specifically, experiments show that when the included angle between two adjacent surfaces of the boss edge of the insert structure is set to be an obtuse angle, the phenomenon that the high-viscosity raw material in a molten state is subjected to injection molding in the middle of the boss edge corner of the insert structure, the stress concentration is directly caused and the glass fiber is not uniform can be avoided due to poor fluidity in injection molding.
In a preferred embodiment of the present invention, the material characteristic parameter includes at least one of capillary viscosity, PVT, thermal conductivity, specific heat, poisson's ratio, and linear expansion coefficient of the material.
Specifically, in order to make the analysis result closer to the actual production condition, the product structure, material performance, molding conditions, injection molding pressure and the like are attached to the actual condition to the greatest extent as possible in the simulation analysis process of the die flow analysis tool, so that whether the material characteristic parameters are accurate or not is the primary reason for ensuring whether the analysis result is accurate or not.
The capillary viscosity is measured by a viscometer, and the fluid viscosity is obtained according to the Hagen-Poisson's law (Hagen-Poisculli);
PVT refers to the specific volume as a function of temperature and pressure;
The heat conductivity coefficient refers to the heat transferred through 1 square meter area within 1 second (1 s) under the stable heat transfer condition, wherein the temperature difference of the surfaces of two sides is 1 degree (K, DEG C) of the material of 1 m;
Specific heat, also called specific heat capacity, refers to the ratio of the amount of heat absorbed at an elevated temperature to the product of its mass and the elevated temperature of a substance of a certain mass;
Poisson's ratio refers to the ratio of the absolute value of the positive transverse strain to the positive axial strain of a material when the material is pulled or pressed in one direction, and is also called the transverse deformation coefficient, which is the elasticity constant reflecting the transverse deformation of the material;
the linear expansion coefficient refers to the ratio of the change in length of the solid substance per 1 degree celsius change in temperature to its length at the original temperature (not necessarily 0 ℃).
In a preferred embodiment of the present invention, the injection molding parameters include at least one of a mold temperature, a material temperature, an insert temperature, and an injection time.
In particular, the injection molding parameters of the product in the injection molding process are quite large, and in the embodiment of the application, the influence of parameters such as the mold temperature, the material temperature, the insert temperature, the injection time and the like on the injection molding result is mainly analyzed.
Fig. 3 and 4 are simulation results of a mold temperature of 180 c, a material temperature of 280 c, and an injection time of 8.5s, and fig. 5 and 6 are simulation results of a mold temperature of 180 c, a material temperature of 280 c, and an injection time of 15s, and as can be seen from the simulation results of fig. 3 to 6, the injection time is prolonged, glass fiber orientation is concentrated, and the probability of stress concentration occurring in a longer injection time is increased, so that the injection time for injection molding should be reduced;
FIGS. 7 and 8 are simulation results of a mold temperature of 50℃and a stock temperature of 280℃and an injection time of 8.5s, and as can be seen from the simulation results of FIGS. 7 and 8, the orientation of glass fibers is still concentrated, the difference between the stock temperature and the mold temperature is large, the cooling speed is too high, and uneven stress distribution occurs, so that the mold temperature should be increased;
Fig. 9 and 10 are simulation results of mold temperature of 180 c, material temperature of 300 c and injection time of 8.5s, and as can be seen from the simulation results of fig. 9 and 10, the material temperature is too high to greatly increase the fluidity of nylon, and the compatibility of glass fiber and nylon in a molten state in a screw is poor, which leads to uneven distribution of glass fiber after injection molding and also causes stress concentration problem, so the material temperature should be reduced;
fig. 11 is a simulation result of the initial condition of 180 degrees celsius for mold temperature, 280 degrees celsius for material temperature, 8.5 seconds for injection time, and no setting for the mold temperature after the insert is added, fig. 12 is a simulation result of the insert temperature being raised to 300 degrees celsius based on the initial condition of fig. 11, and fig. 13 is a simulation result of the insert temperature being adjusted to be identical to the mold temperature, that is, 180 degrees celsius for both the insert temperature and the mold temperature based on the initial condition of fig. 11, and the glass fiber orientation distribution is uniform when the insert temperature is kept identical to the mold temperature through comparison of several simulation results of fig. 11 to 13, which is advantageous for reducing the stress concentration problem.
In summary, the process parameters are adjusted and optimized for multiple times, and then the data are simulated again to obtain the optimal process parameters as follows:
Mold temperature: 180-240 DEG C
Material temperature: 270-290 deg.c
Injection time: 5s to 10s
Insert temperature: 180-240 DEG C
In an embodiment of the present invention, the die flow analysis tool performs die flow analysis on the 3D model of the turbine according to the preset format file and the injection parameters, and obtaining a die flow analysis result includes:
and the die flow analysis tool performs double-layer surface analysis on the 3D model of the turbine according to the preset format file and the injection molding parameters to obtain a die flow analysis result.
Specifically, for products with large wall thickness, shrinkage is inconsistent due to different temperatures of the front mold and the rear mold, that is to say, deformation is caused by temperature difference of two layers of sizing materials and temperature difference of the molds, so that double-layer surface analysis is adopted during die flow analysis, and the accuracy of analysis results can be improved.
In a preferred embodiment of the present invention, the file in the preset format includes a UDB file.
In a preferred embodiment of the present invention, the target material includes a glass fiber reinforced nylon 66 material, and the glass fiber reinforced nylon 66 material includes the following components in percentage by weight:
62.6 to 84.5 percent of PA66, 15 to 35 percent of glass fiber, 0.1 to 0.5 percent of release agent, 0.1 to 0.5 percent of antioxidant, 0.1 to 0.5 percent of zinc sulfide, 0.1 to 0.4 percent of heat stabilizer and 0.1 to 0.5 percent of nucleating agent.
Specifically, the glass fiber reinforced nylon 66 material is adopted as a target material for simulation analysis, and experiments show that when the included angle between two adjacent surfaces of the boss edge of the insert structure is right angle, the target material is injected in the sequence from the outer surface of the cavity to the middle due to poor fluidity of high-viscosity raw materials in a molten state, the corner effect is easy to occur at the corner of the boss right angle of the insert, stress concentration is directly caused, and a plurality of uneven phenomena occur on glass fibers, and when the included angle between two adjacent surfaces of the boss edge of the insert structure is changed into an obtuse angle corner, simulation analysis is carried out, at the moment, the target material is injected along the outer surface of the insert from inside to outside, the gap between the insert and the target material is filled preferentially, the warping stress is reduced from original 1489Mpa to 1100Mpa, and the probability of occurrence of the corner effect is reduced; from the perspective of glass fiber distribution, the orientation degree and uniformity are obviously improved, so that the problem of turbine cracking can be effectively solved by changing the included angle between two adjacent surfaces of the boss edge of the insert structure into an obtuse angle.
Example two
The present invention also provides a turbine injection molding method corresponding to the first embodiment, wherein in the present embodiment, the same or similar content as that of the first embodiment can be referred to the description above, and the description is omitted. Referring to fig. 2, the method comprises the steps of:
s201: and generating the turbine by utilizing the target material injection molding according to the updated injection molding parameters.
Specifically, without losing generality, in the updated injection molding parameters, the angle value of the included angle between two adjacent faces of the boss edge of the insert structure is larger than 90 degrees and smaller than 180 degrees. The raw material is injected along the outer surface of the insert from inside to outside, and the gap between the insert and the raw material is preferentially filled, so that the occurrence probability of the corner effect is reduced.
Example III
Corresponding to the first and second embodiments, the present invention further provides a turbine, which is injection molded by the turbine injection molding method, wherein in this embodiment, the same or similar content as that of the first or second embodiment may be referred to the description above, and will not be repeated here.
The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the invention are intended to be included within the scope of the invention.
Claims (8)
1. A method of die flow analysis of a turbine, the method comprising:
Testing a target material for injection molding of a turbine, and obtaining material characteristic parameters of the target material, wherein the target material comprises glass fiber reinforced nylon 66 material;
Generating a corresponding preset format file according to the material characteristic parameters, and importing the preset format file into a die flow analysis tool;
Introducing the 3D model of the turbine into the die flow analysis tool, and setting injection molding parameters;
the die flow analysis tool performs die flow analysis on the 3D model of the turbine according to the preset format file and the injection molding parameters to obtain a die flow analysis result;
Updating the injection molding parameters according to the die flow analysis result;
The die flow analysis results comprise stress analysis results, the turbine comprises an insert structure, and updating the injection molding parameters according to the die flow analysis results comprises:
updating the angle value of the included angle between two adjacent surfaces of the boss edge of the insert structure in the injection molding parameters according to the stress analysis result,
Comprising the following steps:
and setting the angle value of the included angle between two adjacent surfaces of the boss edge of the insert structure to be more than 90 degrees and less than 180 degrees.
2. The method of claim 1, wherein the material characteristic parameter comprises at least one of capillary viscosity, PVT, thermal conductivity, specific heat, poisson's ratio, and linear expansion coefficient of the material.
3. The method of claim 1, wherein the injection molding parameters include at least one of a mold temperature, a material temperature, an insert temperature, and an injection time.
4. The method of claim 1, wherein the die flow analysis tool performs die flow analysis on the 3D model of the turbine according to the preset format file and the injection parameters, and obtaining a die flow analysis result includes:
And the die flow analysis tool performs double-layer surface analysis on the 3D model of the turbine according to the preset format file and the injection molding parameters to obtain a die flow analysis result.
5. The method of modular flow analysis of a turbine of claim 1, wherein the pre-formatted file comprises a UDB file.
6. The method of claim 1, wherein the glass fiber reinforced nylon 66 material comprises, in weight percent:
62.6 to 84.5 percent of PA66, 15 to 35 percent of glass fiber, 0.1 to 0.5 percent of release agent, 0.1 to 0.5 percent of antioxidant, 0.1 to 0.5 percent of zinc sulfide, 0.1 to 0.4 percent of heat stabilizer and 0.1 to 0.5 percent of nucleating agent.
7. A turbine injection molding method, characterized in that it is based on the method of die flow analysis of a turbine according to any one of claims 1-6, comprising:
and generating the turbine by utilizing the target material injection molding according to the updated injection molding parameters.
8. A turbine, characterized in that it is injection molded by the turbine injection molding method according to claim 7.
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| TW202113736A (en) * | 2019-09-23 | 2021-04-01 | 大陸商信華科技(廈門)有限公司 | Automatic moldflow analysis system and method |
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