CN105269763A - Ceramic injection mould optimal design method and ceramic injection mould - Google Patents
Ceramic injection mould optimal design method and ceramic injection mould Download PDFInfo
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- CN105269763A CN105269763A CN201510755752.3A CN201510755752A CN105269763A CN 105269763 A CN105269763 A CN 105269763A CN 201510755752 A CN201510755752 A CN 201510755752A CN 105269763 A CN105269763 A CN 105269763A
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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
- B29C45/26—Moulds
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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
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/38—Moulds or cores; Details thereof or accessories therefor characterised by the material or the manufacturing process
- B29C33/3835—Designing moulds, e.g. using CAD-CAM
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- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses a ceramic injection mould optimal design method and a ceramic injection mould. The optimal design method includes the following steps that a required ceramic injection mould model is designed through mould design software to serve as an original ceramic injection mould needing to be optimized; a 3D mould model of the original ceramic injection mould is guided out and guided into simulation software; an initial injection moudling channel allowing injection moulding materials to flow into a cavity is built in the 3D model; the 3D model is subjected to ceramic injection moulding forming process simulation through simulation software, and the difference of injection moudling time required by injection moulding of two ceramic products is recorded; whether the injection moulding time is within a preset time range is judged, and the injection moulding channel built in the original ceramic injection mould is improved till injection moulding time difference is within a preset time range. The software is used for injection moulding process simulation, cost in the mould development process is greatly reduced, and mould development and design efficiency is improved. The precision and the quality of the ceramic products are guaranteed, and meanwhile waste of ceramic materials is reduced.
Description
Technical field
The present invention relates to ceramic injection molding technology field, particularly relate to a kind of ceramic injection mold Optimization Design and ceramic injection mold.
Background technology
In ceramic injection mold manufacturing process, the Runner Balance of a multi-cavity mold (product that one set of die has multiple size inconsistent, the corresponding die cavity of each product) is very important.In the past, the experience that is generally through to design channel size, but in order to make the ceramic droplet in die cavity reach flow equilibrium, therefore needs through carrying out the amendment of mould repeatedly, the runner in change mould.And all need to produce the mould after remodifying, and use injected plastics material to carry out injection moulding to amended mould again to judge whether mould arrives requirement at every turn.Die design process so, often causes the waste on time of product development length and cost.
Summary of the invention
Based on this, be necessary for above-mentioned technical problem, provide flexibly a kind of and the lower ceramic injection mold Optimization Design of development cost, and the ceramic injection mold using this Optimization Design to make.
A kind of ceramic injection mold Optimization Design, described ceramic injection mold comprises the die cavity of at least two ceramic products, and this method for designing comprises the following steps:
Use the ceramic injection mold required for Design of Dies Software for Design as the original initial ceramic injection mold needing to optimize;
Derive the mould 3D model of described initial ceramic injection mold;
Described mould 3D model is imported in simulation software;
In described 3D model, structure flow into the initial injection molding channel in described die cavity for injected plastics material;
Use described simulation software to carry out ceramic injection molding process emulation to described mould 3D model, and it is poor to record the injection time that two described ceramic products complete injection mo(u)lding required time;
Judge that described injection time difference is whether in preset time range, if, then will be built with the described initial ceramic injection mold of described initial injection molding channel as final ceramic injection mold, if not, then the injection molding channel built in described initial ceramic injection mold is improved, and again carry out ceramic injection molding process and emulate, until described injection time difference in described preset time range.
As a kind of embodiment of ceramic injection mold Optimization Design, described injection molding channel comprise main injection molding channel and be communicated with described main injection molding channel from injection molding channel;
Described main injection molding channel is for receiving the outside injected plastics material flowed into;
Describedly to be communicated with, for described injected plastics material being passed into the injection moulding carrying out ceramic product in described die cavity from the die cavity of injection molding channel with described ceramic product;
It is improve from injection molding channel described that the described injection molding channel to having built in described initial ceramic injection mold carries out improvement.
As a kind of embodiment of ceramic injection mold Optimization Design, describedly carry out improvement from injection molding channel comprise described: to lengthen and described ceramic product completes that the short die cavity of injection mo(u)lding required time is communicated with from injection molding channel, and/or shorten with described ceramic product complete injection mo(u)lding required time grow die cavity be communicated with from injection molding channel, and/or subtract carefully complete with described ceramic product that the short die cavity of injection mo(u)lding required time is communicated with from injection molding channel, and/or broadening and described ceramic product complete that the long die cavity of injection mo(u)lding required time is communicated with from injection molding channel.
As a kind of embodiment of ceramic injection mold Optimization Design, described injection time difference be both time differences used completing ceramic product injection mo(u)lding in ceramic injection mold in all die cavities at first and finally complete ceramic product injection mo(u)lding.
As a kind of embodiment of ceramic injection mold Optimization Design, described simulation software is Moldflow software.
As a kind of embodiment of ceramic injection mold Optimization Design, described Moldflow software is used to carry out ceramic injection molding process emulation to described mould 3D model, and it is poor to record the injection time that two described ceramic products complete injection mo(u)lding required time, comprises the following steps:
Stress and strain model is carried out to described mould 3D model;
Injection molding channel establishment is carried out to the mould 3D model after stress and strain model; Wherein, described injection molding channel comprises main injection molding channel, from injection molding channel, and cast gate, and described cast gate is arranged on described from injection molding channel and described die cavity junction;
Use the injection molding channel selection material simulation injection moulding process created, record the time that each die cavity completes injection moulding;
Calculate the injection time that two described ceramic products complete injection mo(u)lding required time poor.
As a kind of embodiment of ceramic injection mold Optimization Design, Moldflow software is used to carry out ceramic injection molding process emulation to described mould 3D model, and it is poor to record the injection time that two described ceramic products complete injection mo(u)lding required time, comprises the following steps:
Stress and strain model is carried out to described mould 3D model;
Injection molding channel establishment is carried out to the mould 3D model after stress and strain model; Wherein, described injection molding channel comprises main injection molding channel, from injection molding channel, and cast gate, and described cast gate is arranged on described from injection molding channel and described die cavity junction;
Use the injection molding channel selection material simulation injection moulding process created, and when injection moulding process proceeds to Preset Time, judge the size of remaining non-shot volume in each die cavity;
Predict that each die cavity completes the time of injection moulding according to the size of described non-shot volume;
Calculate the injection time that two described ceramic products complete injection mo(u)lding required time poor.
As a kind of embodiment of ceramic injection mold Optimization Design, dual-layer face grid is adopted to carry out stress and strain model to described mould 3D model.
As a kind of embodiment of ceramic injection mold Optimization Design, the diameter of described injection molding channel is 2 ~ 3 times of described mould 3D model wall thickness.
Based on the one pottery injection mold of same inventive concept, this mould adopts aforesaid ceramic injection mold Optimization Design to carry out design aft-loaded airfoil and is made.
Beneficial effect of the present invention comprises: the ceramic injection mold Optimization Design of one provided by the invention, injection moulding process emulation is carried out by using software, the forming process of ceramic product in mould can be understood in advance, and each mold cavity forming time used, thus design can be optimized by the molding time difference analyzed needed for ceramic product corresponding to different die cavity to the runner in mould, finally make complete injection moulding by the ceramic product of Mold Making close to synchronization, ensure precision and the quality of ceramic product, also reduce the consumption waste of ceramic raw material simultaneously.And the Optimization Design of the embodiment of the present invention uses software to emulate, it all need not produce true model at every turn, greatly reduces the cost in mould development process, also improves the efficiency of mould development design.And use software emulation, it is more accurate that the monitoring of ceramic product schedule carries out injection moulding experiment than true use mould.The parameter of pottery injection moulding process experiment has more uniformity, avoids truly using the judgement of the Influence on test result designer that different simulated conditions are brought in mold process.The advantages such as the ceramic injection mold using this Optimization Design to design equally also just has cost of manufacture low, effective.
Accompanying drawing explanation
Fig. 1 is the flow chart of ceramic injection mold Optimization Design in an embodiment;
Fig. 2 carries out the schematic diagram after stress and strain model to ceramic injection mold in an embodiment;
Fig. 3 has divided rear lattice statistical result software interface sectional drawing to die mesh in an embodiment;
Fig. 4 is injection molding channel curve synoptic diagram in an embodiment;
Fig. 5 is that in an embodiment, injection molding channel has built effect schematic diagram;
Fig. 6 be in an embodiment initial mould 3D model injection moulding process emulated execution to filling effect schematic diagram when 0.4102 second;
Fig. 7 be in an embodiment initial mould 3D model injection moulding process emulated execution to filling effect schematic diagram when 0.5978 second;
Fig. 8 be in an embodiment initial mould 3D model injection moulding process emulated execution to filling effect schematic diagram when 0.8557 second;
Fig. 9 be in an embodiment initial mould 3D model injection moulding process emulated execution to filling effect schematic diagram when 1.020 seconds;
Figure 10 is that mould 3D model injection moulding process emulated execution in an embodiment after optimal design is to filling effect schematic diagram when 0.4291 second;
Figure 11 is that mould 3D model injection moulding process emulated execution in an embodiment after optimal design is to filling effect schematic diagram when 0.5450 second;
Figure 12 is that mould 3D model injection moulding process emulated execution in an embodiment after optimal design is to filling effect schematic diagram when 0.8465 second;
Figure 13 is that mould 3D model injection moulding process emulated execution in an embodiment after optimal design is to filling effect schematic diagram when 1.102 seconds.
Detailed description of the invention
In order to make object of the present invention, technical scheme and advantage clearly understand, be described below in conjunction with the detailed description of the invention of accompanying drawing to ceramic injection mold Optimization Design of the present invention and ceramic injection mold.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
Ceramic injection mold Optimization Design of the present invention is used for designing ceramic injection mold, especially reasonable in design in ceramic injection mold and the injection molding channel that injection moulding is effective.And design of the present invention is mainly for the ceramic injection mold of a multi-cavity mold.For such ceramic injection mold, each mould comprises the die cavity of at least two ceramic products, and certainly, generally the die cavity of two different ceramic products all can be different in shape and volume.
Wherein, the ceramic injection mold Optimization Design of one embodiment of the invention, as shown in Figure 1, comprises the following steps:
S100, uses the ceramic injection mold required for Design of Dies Software for Design as the original initial ceramic injection mold needing to optimize.
Wherein, Design of Dies software-selectable is selected and is used UG mapping software.UG (UnigraphicsNX) is a application software of SiemensPLMSoftware Company.UG mapping software is used first to create the prototype of ceramic injection mold according to demand, as the original initial ceramic injection model needing to optimize.It should be noted that, the initial model of the ceramic injection mold generally herein built is 3D model form.And also can carry out the drafting of described initial ceramic injection mold by other softwares that can carry out 3D modelling of choice for use.
S200, derives the mould 3D model of initial ceramic injection mold.
In this step, for the ease of using other softwares to carry out analogue simulation to the mold former built later, first the initial ceramic injection mold of the 3D built is derived for subsequent use.Wherein, the mould 3D model of derivation can be the forms such as IGS, STL, and certainly, with follow-up simulation software, the form of the mould 3D model of derivation can identify that use is as the criterion.
S300, imports to mould 3D model in simulation software.
After the mould 3D model derivation of completing steps S200, the simulation software chosen in this step, and the model of having derived above is imported in simulation software.In fact, before carrying out step S200, generally determined the follow-up simulation software that will use.Thus can guarantee that derived mould 3D model can use in follow-up simulation software.And general simulation software can identify the die cavity in mould 3D model accurately, and thickness everywhere in die cavity.And simulation software used herein is the software that can emulate ceramic injection moulding process (liquid ceramic material being filled in die cavity).
As Moldflow can be used, ceramic injection moulding process is emulated.It has powerful copying, and graphically can observe the injection moulding situation of each die cavity of each moment at any time.Designer is got information about injection moulding situation.And can result according to the observation cut off at any time emulation bamboo product is optimized to ceramic injection mold.
S400, in 3D model, structure flow into the initial injection molding channel in die cavity for injected plastics material.
The structure of runner and optimization are the emphasis in ceramic injection mold Optimization Design of the present invention.And the runner in this step builds and by simulation software direct construction, again can import in simulation software after other assistant softwares also can be used to build separately.
As a kind of embodiment preferably, UG mapping software can be used to complete the structure of initial ceramic injection mold and build injection molding channel required for subsequent simulation simultaneously.Just directly can be provided with injection molding channel in the mould 3D model of such derivation, thus step S400 is then dissolved in step S100.Make whole ceramic injection mold Optimization Design step more smooth, design efficiency also can be higher.
And carry out in the building process of runner at use non-emulated software, also can use simple curve that the position of runner is set, and obtain the injection molding channel required for injection molding simulation process by the further process of simulation software.
S500, uses simulation software to carry out ceramic injection molding process emulation to mould 3D model, and it is poor to record the injection time that two ceramic products complete injection mo(u)lding required time.
Said injection time is poor herein, for the ceramic injection mold comprising multiple die cavity, can be the time difference that ceramic product that in multiple described die cavity, any two die cavities are corresponding completes between injection mo(u)lding required time.Also can according to pre-conditioned selection wherein two specific ceramic products complete the time difference between injection mo(u)lding required time.As the time difference of time used between two ceramic products completing at first, or complete the time difference used between the ceramic product finally completed at first, or between two ceramic products finally completing injection moulding other injection time of time difference used poor.
Concern for the time difference is because the imbalance of filling time, not only can affect the consumption of ceramic raw material, also can make the excessive pressurize of ceramic product first completing injection moulding, the uniformity that uncontrollable multiple product shrinks, thus the precision and the quality that reduce product.
S600, judge that injection time difference is whether in preset time range, if, then will be built with the initial ceramic injection mold of initial injection molding channel as final ceramic injection mold, if not, then the injection molding channel built in initial ceramic injection mold is improved, and again carries out ceramic injection molding process and emulate, until injection time difference in preset time range.
In this step, by judging injection time difference, finally determine the final ceramic injection mold after optimizing.When injection time, difference was not in preset time range, constantly injection molding channel is improved, certainly, this improvement should be carry out towards constantly reducing judged injection time difference direction, also namely to the die cavity that described injection time is long, it is made finally to complete injection moulding required time progressively near the die cavity that time used time is short by improving runner; And to make it finally complete injection moulding required time elongated by changing its injection molding channel also can to complete the short die cavity of required time to injection moulding, thus two die cavities of existence larger time difference are expected at one time, or complete the injection moulding of ceramic product close to the same time.
As a kind of embodiment, also can improve two runners simultaneously, thus two die cavities can be made to approach the injection moulding simultaneously completing ceramic product faster.
The ceramic injection mold Optimization Design of the embodiment of the present invention, injection moulding process emulation is carried out by using software, the forming process of ceramic product in mould can be understood in advance, and each mold cavity forming time used, thus design can be optimized by the molding time difference analyzed needed for ceramic product corresponding to different die cavity to the runner in mould, finally make complete injection moulding by the ceramic product of Mold Making close to synchronization, ensure precision and the quality of ceramic product, also reduce the consumption waste of ceramic raw material simultaneously.And the Optimization Design of the embodiment of the present invention uses software to emulate, it all need not produce true model at every turn, greatly reduces the cost in mould development process, also improves the efficiency of mould development design.And use software emulation, it is more accurate that the monitoring of ceramic product schedule carries out injection moulding experiment than true use mould.The parameter of pottery injection moulding process experiment has more uniformity, avoids truly using the judgement of the Influence on test result designer that different simulated conditions are brought in mold process.
Preferably, for the mould being provided with multiple die cavity, preferably in described final ceramic injection mold, the corresponding ceramic product of any two die cavities completes the time difference of injection moulding all in described preset time range.Can ensure like this to use all ceramic products made by mould to have the quality be more or less the same, ensure the precision of made ceramic product.
Wherein, described injection molding channel refers in ceramic product forming process, and the ceramic material of external liquids enters into the passage of die cavity.Concrete, injection molding channel comprise main injection molding channel and be communicated with main injection molding channel from injection molding channel.Main injection molding channel is for receiving the outside injected plastics material (for ceramic product, being then ceramic material) flowed into.Be communicated with from injection molding channel with the die cavity of ceramic product, for injected plastics material being passed into the injection moulding carrying out ceramic product in die cavity.Be generally separate from main injection molding channel multiple from injection molding channel, and general each die cavity corresponding one from injection molding channel.Being assigned to of injected plastics material equilibrium in main injection molding channel is each from injection molding channel, then through flowing into die cavity from injection molding channel, die cavity has been filled to the injection moulding of ceramic product.Certainly, generally can be smaller than main injection molding channel flow from injection molding channel.
And the injection molding channel built in initial ceramic injection mold is improved, then refer to and improve from injection molding channel.This is because main injection molding channel is generally determine according to the amount of external equipment supply injected plastics material.And affect the main flow from injection molding channel that each die cavity completes ceramic product injection time.Therefore, if when judging in step S600 that described injection time, difference was not in preset time range, to improve from injection molding channel, change the flow from injection molding channel, make to flow into from main injection molding channel to change from the flow injection molding channel, namely changed by the speed of the injected plastics material flow into corresponding die cavity from this from injection molding channel.Make this die cavity sooner or the slower injection moulding completing ceramic product.Finally make ceramic product corresponding to the multiple die cavities in mould be tending towards same time injection moulding to complete.
Wherein, following several mode is comprised to the improvement carried out from injection molding channel:
1) to lengthen and ceramic product completes that the short die cavity of injection mo(u)lding required time is communicated with from injection molding channel;
2) person shorten with ceramic product complete injection mo(u)lding required time grow die cavity be communicated with from injection molding channel;
3) subtract carefully complete with ceramic product that the short die cavity of injection mo(u)lding required time is communicated with from injection molding channel;
4) broadening complete that the long die cavity of injection mo(u)lding required time is communicated with ceramic product from injection molding channel.
Wherein method 1) and method 3) corresponding be all to completing the improvement carried out from injection molding channel corresponding to injection mo(u)lding time short die cavity, elongated by the injection time making this die cavity complete ceramic product injection moulding used to the improvement from injection molding channel.And method 2) and method 4) be all to completing long corresponding the improving from injection molding channel of die cavity of injection mo(u)lding time, by the improvement from injection molding channel, the injection time making corresponding die cavity complete ceramic product injection moulding used shortens.Certainly, these 4 kinds mutually can combinationally use (any two even 4 be used in combination) to the mode improved from injection molding channel, strengthen the improvement effect from injection molding channel flow.
Preferably, wherein in an embodiment, poor as injection time using completing ceramic product injection mo(u)lding in die cavities all in ceramic injection mold at first and finally completing both of ceramic product injection mo(u)lding time differences used.As long as shorten in preset time range by the Curve guide impeller of runner by poor for injection time like this, then in mould all die cavities complete the ceramic product injection moulding time difference used all can in preset time range, precision and the quality of the ceramic product made can be ensured.
As a kind of embodiment, the mould 3D model of Moldflow software to initial ceramic injection mold is used to carry out ceramic injection molding process emulation.
When using Moldflow software to carry out injection moulding process emulation, also can first use UG mapping software that the ceramic 3D model of Water demand is exported to IGS or the STL form that Moldflow software can identify use.Be described using the ceramic 3D model of IGS form as the simulation process of mould 3D model to Moldflow software below.
Concrete, in UG mapping software, derive mould 3D model can carry out in accordance with the following steps:
File → derivation → IGS → frame selects 3D model → determine.At this, we claim the process deriving IGS form 3D model to be pretreatment process, as the first step of optimal design.
After completing pretreatment process, carry out the importing process of model, the ceramic 3D model of Water demand, also namely said mould 3D model IGS formatted file imports in Moldflow software above, and this step is as the second step of the Optimization Design of the embodiment of the present invention.
Concrete importing process can be carried out in accordance with the following steps at the initial opening interface of Moldflow software:
Import → select the converted IGS form mould 3D model file of UG → determine.
After importing completes, continue the 3rd step performing Moldflow software emulation process: grid division.Stress and strain model is carried out to the mould 3D model imported.
The object of grid division is: utilize imaginary line (or face) inside of continuous media to be become limited size with boundary segmentation, a limited number of, discrete unit, an original continuous print overall simplification is become the system of limited unit, thus obtaining real approximate model, final numerical computations is exactly carry out on the model of this discretization.In Moldflow, the form of finite element is triangle, and the surface characteristics of model is just approached by plane triangle splicing and formed, and form is netted, and therefore, each plane triangle is also known as grid.Moldflow has powerful stress and strain model function, automatically can mark off grid according to user-defined triangle edges long value.
And Moldflow provides 3 kinds of trellis-types:
1. Midplane Mes: generally do not use because analysis precision is low.
2. double layer grid: be applicable to thin-wall case and the more uniform part of wall ratio.
3. entity grid: be applicable to all products, but computing time is longer.
In ceramic injection mold Optimization Design of the present invention, ceramic product wall thickness is that the thinner and wall ratio of 1.2mm is comparatively even, thus use dual-layer face grid carry out dividing more suitable.
Concrete stress and strain model can carry out in accordance with the following steps: use " generating mesh " grid division (clicking " generating mesh " button in toolbar in Moldflow software interface), input the sizing grid of hope in " the global grid length of side " dialog boxes ejected.
It should be noted that, Moldflow software can recommend a sizing grid, and some has higher reference value, but some is also inapplicable.For ensureing fundamental analysis precision, the grid length of side is generally 1.5 ~ 2 times of minimum wall thickness (MINI W.), and grid setting can be little again, and precision can corresponding improve, but will greatly improve computing time.In the present embodiment, when stress and strain model is carried out to mould 3D model, " the global grid length of side " is set to 3, be provided with rear selection mould 3D model, and click " immediately grid division " button, Moldflow software will carry out grid division automatically, and completes the stress and strain model to model, as shown in Figure 2, wherein 01 and 02 two different die cavities are represented in ceramic injection mold.The annexation between two die cavities is not illustrated in Fig. 2.
In addition, Moldflow software carries out after stress and strain model completes, needing to carry out lattice statistical.Concrete, " lattice statistical " button can clicked in Software tool hurdle carries out lattice statistical work.The grid be divided into must meet following principle: each product of UNICOM region can only have 1, free margins and non-overlapping limit, nondirectional unit, cross unit, and complete overlapped elements is 0; The general maximum of aspect ratio should control between 6 ~ 20; Mesh fitting rate should be greater than 85%.After the grid divided the present embodiment is added up, as shown in Figure 3, include two connected regions (corresponding two figures) altogether, aspect ratio maximum is 11.5 to statistics, freely debates and Non-manifold edges is 0.Match-percentage is 95.6%.As shown in Figure 3, the division indices of the present embodiment grid all can meet the demands.
After the stress and strain model work of completing steps three, in the present embodiment, proceed the 4th step, create injection molding channel system.
Injection molding channel refers to the path that in injection machine system, ceramic melt flows in die cavity, and melting charge is from injection machine nozzle to the necessary channel of die cavity.Usually, injection molding channel is by main injection molding channel, from injection molding channel, and cast gate composition.
Wherein, main injection molding channel is the part flowed through at first after melting charge enters mould.Transitional region between being main injection molding channel and cast gate from runner, can make the flow direction of melting charge (ceramic material) obtain mild conversion, have for multiple-cavity mold the function that various chamber is expected in uniform distribution melting.And cast gate also becomes charging aperture, be from the passage between injection molding channel and each die cavity.
In the present embodiment, the constructive process of injection molding channel specifically can be divided into following step:
1) cast gate is first created, from injection molding channel and main injection molding channel curve.And these curves by Moldflow software creation, also can utilize UG software creation, be converted to IGS form and import in Moldflow software again after utilizing UG mapping software to create curve.After structure passage curve as shown in Figure 4.
2) after passage curve has created, trade-off curve in Moldflow software, and click right selects " attribute " that curve attribute is defined as runner attribute.And need the size that each section of runner is set further in runner properties dialog.The diameter of general runner is 2 ~ 3 times of mould 3D model wall thickness, also can determine according to practical experience.In the present embodiment, as shown in Figure 5, arranging main injection molding channel is vertebral body structure, and top diameter is set to 3mm, and end diameter is provided with 5mm.To two, different diameters is set from injection molding channel simultaneously, is set to 4mm from injection molding channel, be set to 3.5mm from injection molding channel 2.And to arrange cast gate width be 2mm, be highly 1mm.
Wherein, for main injection molding channel structure pattern, can select from the structure type that Moldflow software provides.And in the present embodiment, also stress and strain model has been carried out to the injection molding channel after being provided with.The method of stress and strain model is identical with the aforesaid Meshing Method to mould 3D model.
To the emulation of the injection moulding process of the corresponding ceramic product of mould in the present embodiment, be actually the analysis whether a kind of " filling " balances.Therefore, after completing the design of injection molding channel, continue to perform step 5 and analysis type is set.Certainly, " filling " this analysis type can be selected in this step.Concrete analysis type selects step as follows;
Analyze → fill → determine.This is the step that in a Moldflow software, button is selected.
After determining analysis type, in step 6, carry out the selection of packing material.But do not have ceramic material due in the Moldflow software that emulation uses, therefore, in the present embodiment, choice for use plastic material " ABS " replaces.
This is because be diverted to two die cavities at injection fillers stage melt from injection molding channel, when melt arrives the end of two die cavities, namely mold cavity completes filling; Whether this object analyzed compares the end whether simultaneously arriving two die cavities after ceramic droplet is expelled to mold cavity, namely flow and balance.
Because mould two die cavities in mould two chamber are at same set of mould, what in the process of injection, two die cavities flowed into is identical melt material.So identical material and parameter and identical main injection molding channel; Through from the different die cavity of injection molding channel conversion inflow two, thus reach the object whether analysis two cavity fillings balance.
The concrete Material selec-tion that carries out in Moldflow software carries out according to following steps:
Select " material → selection ABS → determine ".Wherein, " material " button is also select in the toolbar of Moldflow software.
After choosing material, also will perform the 7th step, selection material starts the position injected.Concrete, in accordance with the following steps:
The main injection molding channel top of injection position → select → determine.
Visible, first will find the injection position button in Moldflow software during chosen position, and select the top of main injection molding channel, then the top determining main injection molding channel is final injection position, and the ABS material namely emulated starts the place flowed into.
Next, be exactly that injection technological parameter is set in step 8.Arrange in accordance with the following steps in the present embodiment:
Technique setting → data control (i.e. default setting) → determine automatically by Moldflow.
After setting technological parameter, just can start to carry out simulation analysis.
Click the beginning analysis button in software interface, software will enter simulated program.
Check after the embodiment of the present invention emulates that result is that Primary Reference is according to checking with time.First " filling time " in Moldflow software is chosen, then click result, then select to check the filling process of melt in die cavity by animation broadcast interface.
Fig. 6-Fig. 9 is the filling situation of four not two die cavities in the same time.Wherein, Fig. 6 is after filling starts, and the filling situation in 0.4102 second die cavity, can find out, injected plastics material almost arrives the position of cast gate in this moment simultaneously.Fig. 7 and Fig. 8 is respectively 0.5978 second and the filling situation of 0.8557 second two die cavity.And Fig. 9 is the filling situation in 1.02 seconds two die cavities.As can be seen from Figure 9, the die cavity on the right side of this moment completes injection moulding, but left side die cavity approximately also has 10% not fill completely.Clearly, these two cavity fillings are very unbalanced.
And the volume predictions hypothesis left side die cavity when right side die cavity does not have injection moulding to complete yet can not completing injection moulding according to left side die cavity completes the time that injection moulding needs altogether.The time that certain right side die cavity completes injection moulding accurately can be determined according to checking of animation broadcast interface.Like this, determine after two die cavities complete the time required for injection moulding separately, then can calculate the injection time that two ceramic products complete injection mo(u)lding required time poor.And judge that described injection time difference is whether in preset time range, determines whether the ceramic injection mold of the injection molding channel comprising establishment reaches standard, can as final ceramic injection mold.
In addition, also when the time reaches 0.8557 second, directly the injection moulding time required separately can be completed according to volume estimation unfilled in two die cavities two die cavities.Injection time in certain this estimation mode needed for two products all estimates, and directly show according to animation with front one and accurately determine that right side die cavity completes compared with injection moulding required time, its degree of accuracy is a bit weaker.But also can realize completely for veteran designer.
In the embodiment of the present invention, determine that it does not reach final to require according to the display result of Fig. 9.Therefore, in the embodiment of the present invention, injection molding channel is improved.As shown in Figure 10, carry out adding long process from injection molding channel to X section, extended 10mm, also the diameter of X section has been revised as 3mm by original 3.5 millimeters simultaneously and compensates.Need to illustrate, this alter mode be through repeatedly use Moldflow software to carry out simulation analysis draws.Figure 10-Figure 13 is the simulation result of the scheme after not improving in the same time.Wherein, Figure 10 is 0.4291 second two die cavity injection moulding situation; Figure 11 is the injection moulding situation of 0.545 second two die cavity; Figure 12 is the situation that 0.8465 second two die cavity complete injection moulding; Figure 13 illustrates and improves the situation that rear 1.102 seconds two die cavities complete injection moulding.As can be seen from Figure 13, the volume remaining non-injection moulding in two die cavities is substantially identical, and two die cavities almost will fill up injection moulding simultaneously, and the injected plastics material in die cavity reaches flow equilibrium.
So the ceramic injection mold after improving can ensure the uniformity that two ceramic products in mould shrink to make made Product Precision and quality all higher.
And the whole improvement to initial ceramic injection mold, to optimize and be all through that software simulation completes, as long as finally make the mould designed to carry out production and processing, and carry out real simulation process without the need to making multiple mould template in the design process.Pottery Injection Mold Design efficiency is high, and development process cost is low.
Alternatively embodiment, for die cavity each in mould, all can directly use Moldflow software to carry out record to the time that it finally completes injection moulding, and injection time described in the Time Calculation completing injection moulding according to recorded each die cavity is poor.
In addition, the present invention also provides a kind of ceramic injection mold, and this mould adopts the ceramic injection mold Optimization Design of aforementioned any embodiment to carry out design aft-loaded airfoil and is made.The ceramic injection mold adopting aforesaid Optimization Design to make, does not need the test template making multiple early stage in its development and Design process, greatly reduces the holistic cost of Mold Making.
One of ordinary skill in the art will appreciate that, all or part of flow process in above-described embodiment method, that the hardware that can carry out instruction relevant by computer program has come, described program can be stored in a computer read/write memory medium, as in the embodiment of the present invention, this program can be stored in the storage medium of computer system, and is performed by least one processor in this computer system, to realize the flow process of the embodiment comprised as above-mentioned each side method.Wherein, described storage medium can be magnetic disc, CD, read-only store-memory body (Read-OnlyMemory, ROM) or random store-memory body (RandomAccessMemory, RAM) etc.
Each technical characteristic of the above embodiment can combine arbitrarily, for making description succinct, the all possible combination of each technical characteristic in above-described embodiment is not all described, but, as long as the combination of these technical characteristics does not exist contradiction, be all considered to be the scope that this description is recorded.
The above embodiment only have expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but can not therefore be construed as limiting the scope of the patent.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (10)
1. a ceramic injection mold Optimization Design, described ceramic injection mold comprises the die cavity of at least two ceramic products, it is characterized in that, this method for designing comprises the following steps:
Use the ceramic injection mold required for Design of Dies Software for Design as the original initial ceramic injection mold needing to optimize;
Derive the mould 3D model of described initial ceramic injection mold;
Described mould 3D model is imported in simulation software;
In described 3D model, structure flow into the initial injection molding channel in described die cavity for injected plastics material;
Use described simulation software to carry out ceramic injection molding process emulation to described mould 3D model, and it is poor to record the injection time that two described ceramic products complete injection mo(u)lding required time;
Judge that described injection time difference is whether in preset time range, if, then will be built with the described initial ceramic injection mold of described initial injection molding channel as final ceramic injection mold, if not, then the injection molding channel built in described initial ceramic injection mold is improved, and again carry out ceramic injection molding process and emulate, until described injection time difference in described preset time range.
2. ceramic injection mold Optimization Design according to claim 1, is characterized in that, described injection molding channel comprise main injection molding channel and be communicated with described main injection molding channel from injection molding channel;
Described main injection molding channel is for receiving the outside injected plastics material flowed into;
Describedly to be communicated with, for described injected plastics material being passed into the injection moulding carrying out ceramic product in described die cavity from the die cavity of injection molding channel with described ceramic product;
It is improve from injection molding channel described that the described injection molding channel to having built in described initial ceramic injection mold carries out improvement.
3. ceramic injection mold Optimization Design according to claim 2, it is characterized in that, describedly carry out improvement from injection molding channel comprise described: to lengthen and described ceramic product completes that the short die cavity of injection mo(u)lding required time is communicated with from injection molding channel, and/or shorten with described ceramic product complete injection mo(u)lding required time grow die cavity be communicated with from injection molding channel, and/or subtract carefully complete with described ceramic product that the short die cavity of injection mo(u)lding required time is communicated with from injection molding channel, and/or broadening and described ceramic product complete that the long die cavity of injection mo(u)lding required time is communicated with from injection molding channel.
4. ceramic injection mold Optimization Design according to claim 1, it is characterized in that, described injection time difference be both time differences used completing ceramic product injection mo(u)lding in ceramic injection mold in all die cavities at first and finally complete ceramic product injection mo(u)lding.
5. ceramic injection mold Optimization Design according to claim 1, is characterized in that, described simulation software is Moldflow software.
6. ceramic injection mold Optimization Design according to claim 5, it is characterized in that, described Moldflow software is used to carry out ceramic injection molding process emulation to described mould 3D model, and it is poor to record the injection time that two described ceramic products complete injection mo(u)lding required time, comprises the following steps:
Stress and strain model is carried out to described mould 3D model;
Injection molding channel establishment is carried out to the mould 3D model after stress and strain model; Wherein, described injection molding channel comprises main injection molding channel, from injection molding channel, and cast gate, and described cast gate is arranged on described from injection molding channel and described die cavity junction;
Use the injection molding channel selection material simulation injection moulding process created, record the time that each die cavity completes injection moulding;
Calculate the injection time that two described ceramic products complete injection mo(u)lding required time poor.
7. ceramic injection mold Optimization Design according to claim 5, it is characterized in that, Moldflow software is used to carry out ceramic injection molding process emulation to described mould 3D model, and it is poor to record the injection time that two described ceramic products complete injection mo(u)lding required time, comprises the following steps:
Stress and strain model is carried out to described mould 3D model;
Injection molding channel establishment is carried out to the mould 3D model after stress and strain model; Wherein, described injection molding channel comprises main injection molding channel, from injection molding channel, and cast gate, and described cast gate is arranged on described from injection molding channel and described die cavity junction;
Use the injection molding channel selection material simulation injection moulding process created, and when injection moulding process proceeds to Preset Time, judge the size of remaining non-shot volume in each die cavity;
Predict that each die cavity completes the time of injection moulding according to the size of described non-shot volume;
Calculate the injection time that two described ceramic products complete injection mo(u)lding required time poor.
8. the ceramic injection mold Optimization Design according to claim 6 or 7, is characterized in that, adopts dual-layer face grid to carry out stress and strain model to described mould 3D model.
9. ceramic injection mold Optimization Design according to claim 1, is characterized in that, the diameter of described injection molding channel is 2 ~ 3 times of described mould 3D model wall thickness.
10. a ceramic injection mold, is characterized in that, this mould adopts the ceramic injection mold Optimization Design described in any one of claim 1 to 9 to carry out design aft-loaded airfoil and is made.
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Address after: 518000, Shenzhen, Guangdong province Baoan District manhole street new two community Nanling Road, No. 21, B building on the first floor, two floor Applicant after: Shenzhen City, Germany and advanced ceramics Limited by Share Ltd Address before: 518000, Shenzhen, Guangdong province Baoan District manhole street new two community Nanling Road, No. 21, B building on the first floor, two floor Applicant before: Shenzhen Shangde Advanced Ceramic Co., Ltd. |
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Application publication date: 20160127 |