CN108357069A - Cavity injection mold melt flows balance check method - Google Patents
Cavity injection mold melt flows balance check method Download PDFInfo
- Publication number
- CN108357069A CN108357069A CN201810067128.8A CN201810067128A CN108357069A CN 108357069 A CN108357069 A CN 108357069A CN 201810067128 A CN201810067128 A CN 201810067128A CN 108357069 A CN108357069 A CN 108357069A
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- China
- Prior art keywords
- injection molding
- single mode
- injection mold
- cavity
- melt flows
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
-
- 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
- B29C2945/76003—Measured parameter
- B29C2945/76056—Flow rate
- B29C2945/76063—MFI, MFR
-
- 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
- B29C2945/76177—Location of measurement
- B29C2945/76297—Fluids
Abstract
The invention belongs to technical field of mold, are to be related to a kind of cavity injection mold melt flows balance check method more specifically.It is tested to obtain the sample of four groups of different predetermined turgors by four groups of injection moldings, sample is separated into multiple single mode caves product, and it weighs to obtain each single mode cave product weight value, the different groups of substance difference ratios that homogeneous injection molding is not tested are obtained by operation, and four average substance difference ratios are acquired, judge whether the melt flows of cavity injection mold balance according to Rule of judgment.The method of inspection is easy to use, can effectively and reliably judge the quality of cavity injection mold, and judgment criteria and data reference are provided for the examination of new die, improvement cavity injection mold melt flows balance.
Description
Technical field
The invention belongs to technical field of mold, are that be related to a kind of cavity injection mold melt flows flat more specifically
Weigh the method for inspection.
Background technology
In process of injection molding, in order to reduce production cost and improve production efficiency, frequently with cavity injection mold
Structure, the identical injection-molded item of the multiple shape sizes of one-pass molding.Imbalance of flow is in multiple-cavity mold process of injection molding
One of FAQs has great influence to injection-molded item Forming Quality.When being injection moulded using multiple-cavity mold, too early
The die cavity being full of can be because generate serious overlap because of hypertonia during feeding；Slow die cavity was filled then because of plastic cement
Temperature reduces and needs to improve injection pressure, in addition to easy ting produce stress, also result in it is short penetrate, the defect that cavity is discontented.Cause
This, flow equilibrium can not only also help pressurize and cured be smoothed out to avoid overlap, the short defect penetrated.
During actual Mold Making, due to machining accuracy error, the limitation of product ranking and the shadow of other factors
It rings, the melt flows imbalance in die cavity is absolute.Whether the melt flows of cavity injection mold are balanced, tradition
Way is typically to ignore the technical problem.After multiple die trial, by observing the quality of finished product, to judge that cavity is noted
Whether the melt flows of mould balance.But the way cannot effectively and reliably judge the quality of cavity injection mold,
It operates cumbersome.
Invention content
The purpose of the present invention is to provide a kind of cavity injection mold melt flows balance check methods, existing to solve
Have technology is difficult to that the technical issues of whether melt flows of cavity injection mold balance effectively judged.
To achieve the above object, the technical solution adopted by the present invention is：A kind of cavity injection mold melt flows are provided
Balance check method, which is characterized in that include the following steps：
S1 cavity injection mold) is assembled to injection molding machine, the die cavity number of the cavity injection mold is at least two；
S2 four groups of injection moldings experiment) is carried out, to go out four groups of differences predetermined full for injection molding respectively for four groups of injection moldings experiments
The sample of full degree, four groups of different predetermined turgors are respectively f1、f2、f3、f4, and meet 0<f1<f2<f3<f4<100%, f2
Numberical range be 35% to 65%；Every group of injection molding experiment carries out at least once respectively；When setting the cooling after injection molding
Between, make to be not filled by full sample and be injection molding machine ejection, obtains the samples of different groups of not homogeneous injection molding experiments；
S3 the different groups of samples that homogeneous injection molding is not tested) are separated into multiple single mode caves product respectively, and to each
Single mode cave weighing products obtain different groups of each single mode cave product weight values that homogeneous injection molding is not tested；
S4) by the different groups of single mode cave product weight values that homogeneous injection molding is not tested, respectively according to following formula meter
It calculates, obtains the different groups of substance difference ratios that homogeneous injection molding is not tested：
Substance difference ratio=(single mode cave product weight maximum value-single mode cave product weight minimum value)/(each single mode
The sum of cave product weight value/die cavity number)；
Respectively by organizing the substance difference ratio of not homogeneous injection molding experiment together, acquires and correspond respectively to four groups and be molded into
Four average substance difference ratios of type experiment；
S5) if single mode cave product weight value at 10 grams hereinafter, the two of which in four average substance difference ratios are flat
Equal substance difference ratio is more than 20%；
Alternatively, if two of which of the single mode cave product weight value in 10 grams or more, four average substance difference ratios
Average substance difference ratio is more than 10%；
Then the melt flows of the cavity injection mold are uneven；Otherwise, the melt flows of the cavity injection mold are flat
Weighing apparatus.
Further, in step S2) in, f1Numberical range be 15% to 35%；And/or f3Numberical range be
65% to 85%；And/or f4Numberical range be 85% to 100%.
Further, in step S2) in, f1It is 25%；And/or f2It is 50%；And/or f3It is 75%；And/or f4
It is 95%.
Further, in step S2) in, every group of injection molding experiment carries out five times respectively, is tested with every group of injection molding
In last sample three times carry out step S3) to step S5).
Further, the range of the single mode cave product weight value of the cavity injection mold is 0.1 gram to 100 grams.
The present invention having the technical effect that compared with the existing technology：It tests to obtain four groups of differences by four groups of injection moldings and make a reservation for
Sample is separated into multiple single mode caves product by the sample of turgor, and weighs to obtain each single mode cave product weight value, is led to
It crosses operation and obtains the different groups of substance difference ratios that homogeneous injection molding is not tested, and acquire four average substance difference ratios,
Judge whether the melt flows of cavity injection mold balance according to Rule of judgment.The method of inspection is easy to use, can effectively may be used
The quality of cavity injection mold is judged by ground, is carried for the examination of new die, improvement cavity injection mold melt flows balance
For judgment criteria and data reference.
Specific implementation mode
In order to make technical problems, technical solutions and advantages to be solved be more clearly understood, tie below
Embodiment is closed, the present invention will be described in further detail.It should be appreciated that specific embodiment described herein is only used to
It explains the present invention, is not intended to limit the present invention.
The cavity injection mold melt flows balance check method, includes the following steps：
S1 cavity injection mold) is assembled to injection molding machine, the die cavity number of the cavity injection mold is at least two；
The quantity of die cavity number does not limit.
S2 four groups of injection moldings experiment) is carried out, to go out four groups of differences predetermined full for injection molding respectively for four groups of injection moldings experiments
The sample of full degree, four groups of different predetermined turgors are respectively f1、f2、f3、f4, and meet 0<f1<f2<f3<f4<100%, f2
Numberical range be 35% to 65%；Every group of injection molding experiment carries out at least once respectively；When setting the cooling after injection molding
Between, make to be not filled by full sample and be injection molding machine ejection, obtains the samples of different groups of not homogeneous injection molding experiments；Wherein, full
Degree refers to the percentage that plastic cement is filled in die cavity.Different predetermined turgors obtain by adjusting the component of filling plastic cement.It is cold
But the time can be more than or equal to 10 seconds.
S3 the different groups of samples that homogeneous injection molding is not tested) are separated into multiple single mode caves product respectively, and to each
Single mode cave weighing products obtain different groups of each single mode cave product weight values that homogeneous injection molding is not tested；
S4) by the different groups of single mode cave product weight values that homogeneous injection molding is not tested, respectively according to following formula meter
It calculates, obtains the different groups of substance difference ratios that homogeneous injection molding is not tested：
Substance difference ratio=(single mode cave product weight maximum value-single mode cave product weight minimum value)/(each single mode
The sum of cave product weight value/die cavity number)；
Respectively by organizing the substance difference ratio of not homogeneous injection molding experiment together, acquires and correspond respectively to four groups and be molded into
Four average substance difference ratios of type experiment；
S5) if single mode cave product weight value at 10 grams hereinafter, the two of which in four average substance difference ratios are flat
Equal substance difference ratio is more than 20%；
Alternatively, if two of which of the single mode cave product weight value in 10 grams or more, four average substance difference ratios
Average substance difference ratio is more than 10%；
Then the melt flows of the cavity injection mold are uneven, and mold acceptance does not pass through；Otherwise, which is molded
The melt flows of mold balance, and mold acceptance passes through.
It is tested to obtain the sample of four groups of different predetermined turgors by four groups of injection moldings, sample is separated into multiple lists
Die cavity product, and weigh to obtain each single mode cave product weight value, different groups of not homogeneous injection molding experiments are obtained by operation
Substance difference ratio, and acquire four average substance difference ratios, judge melting for cavity injection mold according to Rule of judgment
Whether body flowing balances.The method of inspection is easy to use, can effectively and reliably judge the quality of cavity injection mold, be new
The examination of mold improves cavity injection mold melt flows balance offer judgment criteria and data reference.
Injection molding experiment is carried out with predetermined injection pressure and predetermined injection speed, for example predetermined injection pressure is
130bar, predetermined injection speed are 60%.
It is to be appreciated that the group number of injection molding experiment does not limit, three, correspondingly, step can be more than or equal to
S5 the Rule of judgment in) is adjusted accordingly.
Further, one group of tool as cavity injection mold melt flows balance check method provided by the invention
Body embodiment, in step S2) in, f1Numberical range be 15% to 35%；f3Numberical range be 65% to 85%；f4's
Numberical range is 85% to 100%.The configuration convenient for plastic cement be filled in die cavity component control, be suitable for step S5) judgement item
Part.
Further, one group of tool as cavity injection mold melt flows balance check method provided by the invention
Body embodiment, in step S2) in, f1It is 25%；f2It is 50%；f3It is 75%；f4It is 95%.The configuration is filled convenient for plastic cement
In die cavity component control, be more suitable for step S5) Rule of judgment.The sample of predetermined turgor 95% is to be once molded into
The most fast single mode cave product of melt flows is as reference standard in type experiment.
Further, one group of tool as cavity injection mold melt flows balance check method provided by the invention
Body embodiment, in step S2) in, every group of injection molding experiment carries out five times respectively, in being tested with every group of injection molding most
Sample three times carries out step S3 afterwards) to step S5).Every group of injection molding experiment carries out five times, extracts last sample three times
The truth that cavity injection mold can more be embodied, avoid front injection molding experiment occur mold or injection molding machine it is non-just
Normal working condition, raising judge the accuracy whether cavity injection mold melt flows balance.
Further, one group of tool as cavity injection mold melt flows balance check method provided by the invention
The range of body embodiment, the single mode cave product weight value of the cavity injection mold is 0.1 gram to 100 grams.It produces in the single mode cave
Product within the scope of product gravimetric value is applicable in above-mentioned cavity injection mold melt flows balance check method, applied widely,
Substantially it can cover the inspection of all cavity injection molds.Cavity injection mold melt flows balance check method is suitable for
Various plastic material moldings.
Illustrate cavity injection mold melt flows balance check method below by way of an embodiment.Using following《New mould
Has melt flows equilibrium analysis table》Form record the information of four groups of injection moldings experiment, including it is sample turgor, predetermined
Injection pressure, predetermined injection speed, pressurize switching position, cooling time, single mode cave product weight value (substance), weight differential
Ratio, average weight difference ratio etc..
In step S2) in, four groups of different predetermined turgors：f1It is 25%；f2It is 50%；f3It is 75%； f4It is 95%.
Every group of injection molding experiment carries out five times respectively, and the last sample three times in being tested with every group of injection molding carries out step S3)
To step S5).Same group of injection molding is tested, mould preparation sample serial number is respectively labeled as 1,2,3.Injection pressure is
130bar, injection speed are 60%.
The cavity injection mold be two template dies, four cave side of a mould into glue structure.Four die cavitys are respectively labeled as
CAV1#、CAV2#、CAV3#、CAV4#。
New die melt flows equilibrium analysis table
Mould-type：Two Ban Mo ＆1 moulds, 4 cave side is into glue board model：Her close UN160SM molten plastics temperature：190-
215℃
Material：ABS15E1 mold temperatures：(mold core) 65 DEG C of making dates：2017/11/13
Substance difference ratio=(single mode cave product weight maximum value-single mode cave product weight minimum value)/(each die cavity product
The sum of weight/die cavity number)
As can be seen from the table when the turgor of single mode cave product is 25%, 50%, the average substance of product
At 10 grams hereinafter, but substance difference ratio be above 20%；When the turgor of single mode cave product 75%, 95% when
It waits, the average substance of product is at 10 grams or more, but substance difference ratio has been above 10%, it is possible to judge that this set is many types of
Chamber injection mold melt flows are uneven.
During injection mold die trial is examined, operated with the above-mentioned method of inspection, and result is recorded in
《New die melt flows equilibrium analysis table》In, it is then for statistical analysis to the numerical value of record, so that it may to judge the mold
Whether melt flows balance, and the numerical value in addition recorded can provide reference for improvement plan.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement etc., should all be included in the protection scope of the present invention made by within refreshing and principle.
Claims (5)
1. cavity injection mold melt flows balance check method, which is characterized in that include the following steps：
S1 cavity injection mold) is assembled to injection molding machine, the die cavity number of the cavity injection mold is at least two；
S2 four groups of injection moldings experiment) is carried out, injection molding goes out four groups of differences and makes a reservation for full journey respectively for four groups of injection moldings experiments
The sample of degree, four groups of different predetermined turgors are respectively f1、f2、f3、f4, and meet 0<f1<f2<f3<f4<100%, f2Number
Value range is 35% to 65%；Every group of injection molding experiment carries out at least once respectively；Cooling time after setting injection molding, make not
It fills full sample and is injection molding machine ejection, obtain the different groups of samples that homogeneous injection molding is not tested；
S3 the different groups of samples that homogeneous injection molding is not tested) are separated into multiple single mode caves product respectively, and to each single mode
Cave weighing products obtain different groups of each single mode cave product weight values that homogeneous injection molding is not tested；
S4 it) by the different groups of single mode cave product weight values that homogeneous injection molding is not tested, calculates, obtains according to following formula respectively
The difference group substance difference ratio that homogeneous injection molding is not tested：
Substance difference ratio=(single mode cave product weight maximum value-single mode cave product weight minimum value)/(each single mode cave product
The sum of gravimetric value/die cavity number)；
Respectively by organizing the substance difference ratio of not homogeneous injection molding experiment together, acquires and correspond respectively to four groups of injection molding experiments
Four average substance difference ratios；
S5) if single mode cave product weight value at 10 grams hereinafter, the two of which in four average substance difference ratios are average single
The different ratio of the method for double differences is more than 20%；
Alternatively, if two of which of the single mode cave product weight value in 10 grams or more, four average substance difference ratios is average
Substance difference ratio is more than 10%；
Then the melt flows of the cavity injection mold are uneven；Otherwise, the melt flows balance of the cavity injection mold.
2. cavity injection mold melt flows balance check method as described in claim 1, which is characterized in that in step
S2 in), f1Numberical range be 15% to 35%；And/or f3Numberical range be 65% to 85%；And/or f4Numerical value model
Enclose is 85% to 100%.
3. cavity injection mold melt flows balance check method as described in claim 1, which is characterized in that in step
S2 in), f1It is 25%；And/or f2It is 50%；And/or f3It is 75%；And/or f4It is 95%.
4. cavity injection mold melt flows balance check method as described in any one of claims 1 to 3, feature exist
In in step S2) in, every group of injection molding experiment carries out five times respectively, in being tested with every group of injection molding it is last three times
Sample carries out step S3) to step S5).
5. cavity injection mold melt flows balance check method as described in any one of claims 1 to 3, feature exist
In the range of the single mode cave product weight value of the cavity injection mold is 0.1 gram to 100 grams.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810067128.8A CN108357069B (en) | 2018-01-24 | 2018-01-24 | Melt flow balance test method for multi-cavity injection mold |
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|---|---|---|---|
| CN201810067128.8A CN108357069B (en) | 2018-01-24 | 2018-01-24 | Melt flow balance test method for multi-cavity injection mold |
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| CN108357069A true CN108357069A (en) | 2018-08-03 |
| CN108357069B CN108357069B (en) | 2020-06-23 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112677437A (en) * | 2020-12-07 | 2021-04-20 | 上海澎睿智能科技有限公司 | Method for verifying flow balance in mold through data analysis |
| CN115320050A (en) * | 2022-09-06 | 2022-11-11 | 健大电业制品（昆山）有限公司 | Multi-cavity injection molding method |
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| CN104772881A (en) * | 2015-04-15 | 2015-07-15 | 合兴集团有限公司 | Method and device for adjusting runner balance of multi-cavity mold |
| CN206106268U (en) * | 2016-10-31 | 2017-04-19 | 南京建勋塑胶模具有限公司 | Survey mould cavity pressure device and injection mold |
| CN106671369A (en) * | 2016-11-17 | 2017-05-17 | 广东伟达智能装备股份有限公司 | Injection molding machine controlling system and method |
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Patent Citations (4)
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| CN102328400A (en) * | 2011-09-28 | 2012-01-25 | 凡嘉科技（无锡）有限公司 | Structure for adjusting flow balance in mould |
| CN104772881A (en) * | 2015-04-15 | 2015-07-15 | 合兴集团有限公司 | Method and device for adjusting runner balance of multi-cavity mold |
| CN206106268U (en) * | 2016-10-31 | 2017-04-19 | 南京建勋塑胶模具有限公司 | Survey mould cavity pressure device and injection mold |
| CN106671369A (en) * | 2016-11-17 | 2017-05-17 | 广东伟达智能装备股份有限公司 | Injection molding machine controlling system and method |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112677437A (en) * | 2020-12-07 | 2021-04-20 | 上海澎睿智能科技有限公司 | Method for verifying flow balance in mold through data analysis |
| CN115320050A (en) * | 2022-09-06 | 2022-11-11 | 健大电业制品（昆山）有限公司 | Multi-cavity injection molding method |
| CN115320050B (en) * | 2022-09-06 | 2024-04-09 | 健大电业制品（昆山）有限公司 | Multi-cavity injection molding method |
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