CN106273240B - A kind of extraneous gas aid injection molding method and apparatus based on pressure measurement - Google Patents
A kind of extraneous gas aid injection molding method and apparatus based on pressure measurement Download PDFInfo
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- CN106273240B CN106273240B CN201610862680.7A CN201610862680A CN106273240B CN 106273240 B CN106273240 B CN 106273240B CN 201610862680 A CN201610862680 A CN 201610862680A CN 106273240 B CN106273240 B CN 106273240B
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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
- B29C45/0025—Preventing defects on the moulded article, e.g. weld lines, shrinkage marks
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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
- B29C45/1703—Introducing an auxiliary fluid into the mould
- B29C45/174—Applying a pressurised fluid to the outer surface of the injected material inside the mould cavity, e.g. for preventing shrinkage marks
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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
- 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
- B29C45/78—Measuring, controlling or regulating of temperature
-
- 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
- B29C2945/76006—Pressure
-
- 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
- B29C2945/7604—Temperature
-
- 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
- B29C2945/76494—Controlled parameter
- B29C2945/76498—Pressure
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 invention discloses a kind of extraneous gas aid injection molding method and apparatus based on pressure measurement, this method proposes the control that gas injection time is carried out according to pressure measurement and product quality data based on the relationship of cavity pressure during extraneous gas aid injection molding and polymer cooled and solidified layer, the realization of method is needed using auxiliary injection moulding apparatus, which includes injection mold, pressure-measuring system, gas injection and control system etc..The present invention is by introducing extraneous gas aid injection molding for pressure measurement, cooled and solidified layer thickness variation in cavity pressure variation and forming process and its influence to shrink mark depth are connected, the method and its equipment of gas injection time can rationally be judged by obtaining a whole set of, solve the problems such as existing method judges the inaccuracy that the complexity of gas injection time method and gas injection time judge, the difficulty of extraneous gas aid injection molding application is reduced, while also improving product quality.
Description
Technical field
The invention belongs to extraneous gas assisted Injection Molding Technology fields, and in particular to a kind of outside based on pressure measurement
Gas assistant injection molding method and apparatus.
Background technique
In recent years, with the rapid development of injection molding technology, requirement of the various circles of society to injecting products is higher and higher,
It is required that while injecting products are lighter, thinner, it is also desirable to which injecting products can possess relatively good surface quality, and reach one
Fixed intensity, rigidity requirement.However, there are many defects, such as certain band reinforcing ribs injection molding system for the product of traditional injection moulding molding production
Product can generate shrink mark, to influence surface quality；Buckling deformation can also change the shape etc. of injection-molded item.
In order to solve the problems of traditional injection moulding molding and meet society and industrial special requirement, many passes
It is continued to bring out in the improving technology of injection molding, for example quickly becomes the injection moldings skills such as mould temperature, gas assisted injection, fretting map
Art.Extraneous gas assisted injection molding (referred to as: " outer auxiliary ") is exactly one of technology therein.Auxiliary outside is to assist infusing in internal gas
A kind of modification method proposed on the basis of molding technology, after melt is filled up completely type chamber, by the gas of certain pressure from outer auxiliary
It is uniformly injected into equipment between mold cavity surface and the plastics solidification layer of packing stage formation, and keeps certain pressure.
Gas sets up protective layer on the plastic surface, completes the pressure maintaining and cooling procedure of injection molding.The technology can eliminate shrink mark, subtract
Few buckling deformation improves Product Precision, efficiently produces the product of excellent surface quality, while substantially reducing dwell pressure,
So as to deform small product using the lesser injection molding machine production larger size of mold clamping force, reach the mesh for reducing production cost
's.In addition, auxiliary outside do not need the prerequisite larger size air passage structure of traditional gas assisted injection molding institute, production can not be changed
Product structure can improve product each section wall thickness further instead to improve intensity, save material, and technology adapts to wide.
Plastics are changed into viscous state under the action of heat is with power, from the glassy state of room temperature experience elastomeric state, and injection has one
Shape shape closed cavity, then gradually cooled down in die cavity, returned from viscous state and go back to glassy state through elastomeric state, eventually form with
The consistent product of mold cavity shapes.In injection molding, cavity pressure is time changing.When the rigid injection type chamber of melt, type chamber pressure
Power can steeply rise, until injection molding terminates to reach peak value.During plastics are cooled to glassy state from viscous state, each aggregation shape
State is divided into several layers in a thickness direction, and molten plastic touches the mold cavity of lower temperature first, is formed on surface
Cooled and solidified layer.With the progress of forming process, cooled and solidified layer is inwardly gradually promoted, while plastics are also cooling from molten condition
To solid-state, plastic volume is reduced in this course, and the voidage between plastics and type chamber becomes larger, under the intracavitary pressure of type
Drop.Therefore, during plastics pressure maintaining is cooling, while cooled and solidified thickness becomes larger, the pressure in mold cavity surface can decline.Type
The variation of chamber surface pressing is directly related with the thickness change of cooled and solidified layer.
In outer shaping, gas injecting time will match with cooled and solidified thickness degree.It is the early period of pressure maintaining cooling, cooling
Solidification layer temperature is higher, and thickness compares relatively thin, therefore intensity is lower, if at this time mold cavity surface and cooled and solidified layer it
Between inject gas, the gas with pressure, which will lead to, plastic surface irregularity or even punctures plastic, is unable to reach high-quality surface
The requirement of plastic.And the progress cooling with pressure maintaining, temperature gradually decrease, condensate layer gradually thickens, and intensity constantly rises.If
Extraneous gas injection length too late, due to the overwhelming majority melt have been cooled under the glassy state temperature of plastics, from outside
The band pressed gas of injection, substantially without impetus, is not achieved the gas that external auxiliary injection molding requires and protects to cooled and solidified layer
Press effect.
Summary of the invention
For the above-mentioned problems in the prior art, it is outer based on pressure measurement that the purpose of the present invention is to provide a kind of
Portion's gas assistant injection molding method and molding equipment, it can solve the complexity and note that existing equipment judges gas injection time method
The inaccuracy and outer shaping equipment of gas time judgement are easy to show gas breakdown plastic or can not substantially eliminate shrink mark etc.
Problem.
A kind of extraneous gas aid injection molding method based on pressure measurement, it is characterised in that including following step
It is rapid:
1) the type chamber in forming process and the pressure information between plastic surface are acquired
Pressure sensor is installed on mold cavity surface, the multipoint pressure number between real-time acquisition type chamber and plastic surface
According to, and the pressure data measured is transferred to pressure treatment device processing；
2) pressure versus time basis of reference is established
Pressure treatment device is converted into after being handled the pressure signal between detected type chamber and plastic surface
Electric signal is transmitted to control device and is handled, and control device is according to the pressure data and receiving time received, by number pressure
It is fabricated to pressure versus time coordinate diagram according to foundation, and time horizontal axis in coordinate diagram is split according to identical time interval, is looked for
To corresponding pressure span, each pressure versus time region is set as ideal gas injection pressure-time zone, as reference
Benchmark；
3) suitable gas injection time region is selected
The plastic in one group of injection molding is chosen, in plastic injection molding process, reference that control device obtains step 2
Each region signal in benchmark feeds back to the auxiliary pressure-regulating device input terminal of gas of the corresponding auxiliary control device of each gas respectively,
Obtained signal is sent to gas compressor by output end by the auxiliary pressure-regulating device of gas, and control gas compressor, which is sent out, to be corresponded to
The gas of pressure, which enters in air accumulator, to be stored, and gas auxiliary switch device is opened, and the gas of air accumulator is passed through inlet channel and air tube
Gas injection is carried out to plastics, after gas injection, it is right to measure each pressure versus time region institute by measuring device for each pickup of depanning
The shrink mark depth value for answering plastic, using the shrink mark depth value the smallest time as suitable gas injection time region；
4) when batch is molded plastic, the time in the gas injection time region that step 3) is obtained as gas injection time, that is, exists
After the completion of injection molding, after being cooled to the time in gas injection time region, gas injection, assistant formation are carried out.
The extraneous gas aid injection molding method based on pressure measurement, it is characterised in that the division of time interval
Foundation: it chooses the cooling preliminary stage of pressure maintaining and is divided.
The extraneous gas aid injection molding method based on pressure measurement, it is characterised in that pressure sensor is real-time
Variation between monitor-type chamber and plastic surface, and each pressure signal is transferred to pressure treatment device, it is filled through pressure treatment
It sets and be converted into electric signal transmission to control device.
The extraneous gas aid injection molding method based on pressure measurement, it is characterised in that control device includes letter
Number reception device, signal processing apparatus and signal transmitting apparatus, signal receiving device receive the pressure from pressure treatment device
Signal is established the statistical model that pressure changes over time during forming by signal processing apparatus, and data is depicted as pressure-
Time coordinate figure, and time horizontal axis is split according to identical time interval, corresponding pressure span is found, by each pressure
Power-time zone is set as ideal gas injection region, then is successively passed the ideal gas injection regional signal of setting by signal transmitting apparatus
The auxiliary control device of gas is transported to, outer auxiliary gas injection is carried out by the auxiliary control device of gas.
The extraneous gas aid injection molding method based on pressure measurement, it is characterised in that the auxiliary control device of gas connects
The signal of control device transmission is received to control the high pressure gas of gas compressor output relevant pressure, to complete extraneous gas injection
Process；The auxiliary pressure-regulating device of gas is used for the parameter of regulating gas compressor, and to be produced into the gas of different pressures, gas is auxiliary to be opened
It closes device and controls whether gas injection.
The extraneous gas aid injection molding of the extraneous gas aid injection molding method based on pressure measurement is set
It is standby, including injection mold, the injection mold is equipped with sprue bush, and equipped with locating ring, the injection mold is equipped at sprue bush top
Type chamber, air tube, inlet channel, push rod and pressure sensor, it is characterised in that pressure sensor and pressure treatment device signal connect
It connects, pressure treatment device is sequentially connected the gentle auxiliary control device of control device, and the auxiliary control device of gas connects gas by inlet channel
Needle, the compressed gas in the auxiliary control device of gas enter the intracavitary portion of type by air tube.
The extraneous gas aid injection molding of the extraneous gas aid injection molding method based on pressure measurement is set
It is standby, it is characterised in that the auxiliary control device of gas includes the auxiliary pressure-regulating device of gas, gas compressor, air accumulator and gas auxiliary switch dress
It sets, the auxiliary pressure-regulating device input terminal of gas is connect with control device signal, and the auxiliary pressure-regulating device output end of gas connects gas
Gas compressor, gas compressor are connect with air accumulator, air tube by inlet channel, and gas auxiliary switch device is arranged in air accumulator and gas
On inlet channel between needle, for controlling air tube outlet.
The extraneous gas aid injection molding of the extraneous gas aid injection molding method based on pressure measurement is set
It is standby, it is characterised in that air tube includes 4, and air tube uniform intervals are threaded in injection mold body interior, and air tube end is located at
Type chamber lower surface.
The extraneous gas aid injection molding of the extraneous gas aid injection molding method based on pressure measurement is set
It is standby, it is characterised in that pressure sensor surface is equipped with screw thread, is arranged in injection mold ontology by screw thread, is used for monitor-type chamber
With the pressure change between plastic surface.
By using above-mentioned technology, compared with prior art, beneficial effects of the present invention are as follows:
1) present invention uses the extraneous gas aid injection molding equipment based on pressure measurement, including injection mold, described
Injection mold is equipped with sprue bush, is equipped with locating ring at the top of sprue bush, injection mold be equipped with type chamber, air tube, inlet channel, push rod and
Pressure sensor, pressure sensor are connect with pressure treatment device signal, and it is gentle that pressure treatment device is sequentially connected control device
Auxiliary control device, the auxiliary control device of gas connect air tube by inlet channel, and the compressed gas in the auxiliary control device of gas passes through air tube
Into the intracavitary portion of type.The present invention by by pressure measurement compared with equipment integrate, obtaining a whole set of can rationally judge
The equipment of gas injection time improves production and processing efficiency, solves complexity and gas injection that existing equipment judges gas injection time method
The problems such as inaccuracy of time judgement, while the surface quality of plastic is also improved, improve product quality；
2) present invention carries out injection molding by using the extraneous gas aid injection molding equipment of restriction, by by modern age
The method combined with traditional mathematics method establishes the relational graph that pressure changes over time, i.e., pressure data is fabricated to pressure
Power-time coordinate figure simultaneously divides part-time horizontal axis in coordinate diagram according to identical time interval row, finds corresponding
Pressure span is simultaneously shown with computer technology.Each pressure versus time region is set as ideal gas injection pressure by control device
Each region signal is successively fed back to the auxiliary control device of gas, gas auxiliary control by power-time zone respectively in injection molding later
Device processed carries out gas injection to mold according to the time signal in regional signal.It after depanning pickup, is cooled to room temperature, measuring device is surveyed
The shrink mark depth value for measuring plastic corresponding to each region, the shrink mark depth of plastic corresponding to each region is measured by measuring device
Value, compares the value to correct gas injection time region the most suitable, and extensive after the gas injection time region is applied to
In production practices.The shrink mark that the reinforcing rib back side or thick wall part surface occur can be reduced to minimum by this method, keep plastic another
Reach higher surface quality on one side.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the invention；
Fig. 2 is the present invention obtained cavity pressure and time graph relationship in the case where the intervention of no extraneous gas
Figure.
In figure: 1- cast gate, 2- type chamber, 3- pressure sensor, 4- inlet channel, 5- push rod, 6- air tube, 7- sprue bush,
8- locating ring, 9- pressure treatment device, 10- control device, the auxiliary pressure-regulating device of 11- gas, 12- gas compressor, 13- gas storage
Tank, 14- gas auxiliary switch device, the auxiliary control device of 15- gas.
Specific embodiment
Below in conjunction with illustrating that attached drawing is specifically described implementation process of the invention, but protection scope of the present invention is not limited in
This:
As shown in Figure 1, a kind of extraneous gas aid injection molding equipment based on pressure measurement of the invention, including injection molding
Die ontology, the injection mold are equipped with sprue bush 7, locating ring 8 are equipped at the top of sprue bush 7, and the injection mold is equipped with type chamber
2, air tube 6, inlet channel 4, push rod 5 and pressure sensor 3, pressure sensor 3 are connect with 9 signal of pressure treatment device, pressure
Processing unit 9 is sequentially connected the gentle auxiliary control device 15 of control device 10, and the auxiliary control device 15 of gas connects gas by inlet channel 4
Needle 6, the compressed gas in the auxiliary control device 15 of gas are entered inside type chamber 2 by air tube 6.Pressure sensor 3 is located at table in type chamber 2
Face, for the pressure change between real-time monitoring type chamber 2 and plastic surface, pressure sensor 3 and 9 signal of pressure treatment device connect
It connects, pressure treatment device 9 is sequentially connected the gentle auxiliary control device 15 of control device 10, and the auxiliary control device 15 of gas includes the auxiliary pressure of gas
Regulating device 11, gas compressor 12, air accumulator 13 and gas auxiliary switch device 14, auxiliary 11 input terminal of pressure-regulating device of gas
Connect with 10 signal of control device, auxiliary 11 output end of pressure-regulating device of gas connects gas compressor 12, gas compressor 12 with
Air accumulator 13, air tube 6 are connected by inlet channel 4, and the air inlet between air accumulator 13 and air tube 6 is arranged in gas auxiliary switch device 14
On channel 4, for controlling 6 outlet of air tube.
As shown, the course of work of the invention is as follows: after the completion of injection molding, 3 real-time detection type chamber 2 of pressure sensor with
Pressure change between plastic surface, and its pressure data is fed back into pressure treatment device 9, it is received by 9 Duis of pressure treatment device
The processing of the pressure signal arrived is sent after being changed pressure signal measured by the pressure sensor 3 of 2 inner surface of type chamber
To control device 10, control device 10 by real-time reception to the pressure signal from pressure sensor 3 handle, establish note
The statistical model of pressure and time change in molding product forming process, and be ordinate by abscissa, pressure of the time, it will correspond to
Pressure and the time be depicted as pressure versus time coordinate diagram, and the horizontal axis time is split according to identical time interval, is found
Each pressure versus time region is set as ideal gas injection region by corresponding pressure span, then a batch injection molding plastic is selected to carry out in parallel in fact
It tests, therefrom selects suitable time zone, i.e., in plastic injection molding process, control device will be in obtained basis of reference
Each ideal gas injection regional signal feeds back to the auxiliary pressure-regulating device input terminal of gas of the corresponding auxiliary control device of each gas respectively,
Obtained signal is sent to gas compressor by output end by the auxiliary pressure-regulating device of gas, and control gas compressor, which is sent out, to be corresponded to
The gas of pressure, which enters in air accumulator, to be stored, and gas auxiliary switch device is opened, and the gas of air accumulator is passed through inlet channel and air tube
Gas injection is carried out to plastics, after gas injection, it is right to measure each pressure versus time region institute by measuring device for each pickup of depanning
The shrink mark depth value for answering plastic, using the shrink mark depth value the smallest time as suitable gas injection time region；When batch infuses inverse modeling,
Using obtained suitable gas injection time region as gas injection time region, that is, after the completion of being molded, first it is cooled to gas injection time region
Time, (such as gas injection time region was 3-5s, then after first cooling down 3s, then carries out gas injection, guarantee to have acted in the inside and outside 3-5 gas
On plastic surface), then the auxiliary pressure adjusting of gas that the ideal gas injection regional signal of setting is transmitted to the auxiliary control device 15 of gas
Device 11 is controlled the pressure of the compressed gas of gas compressor 12 by the auxiliary pressure-regulating device 11 of gas, makes gas compressor 12
The compressed gas of input relevant pressure is deposited into air accumulator 13, gas auxiliary switch device 14 is opened, by the corresponding pressure in air accumulator 13
The gas of power carries out gas injection through inlet channel 4 and air tube 6, i.e., is compressed using the gas flexible regulating gas of auxiliary pressure-regulating device 11
The pressure parameter of machine 12 to be produced into the gas of different pressures, then controls whether to infuse to outside by gas auxiliary switch device 14
Gas is quick on the draw rapidly, it can judge suitably to infuse by rationally having used pressure sensing technologies in outer shaping equipment
The gas time improves production and processing efficiency, solves complexity and gas injection time judgement that existing equipment judges gas injection time method
Inaccuracy the problems such as, while can also effectively eliminate Surface Shrink Marks of Plastic Parts, improve product quality.
Embodiment 1:
As shown in Fig. 2, the schematic diagram be in the case where the intervention of no extraneous gas obtained cavity pressure and time
Curve relation figure.T in figure1-t2Injection phase is represented, when molten plastic has just initially entered in type chamber, cavity space volume becomes
Few, since molten plastic injection moulding speed is very fast, therefore cavity pressure increases sharply, in injection molding later stage, molten plastic injection molding speed
Spend slack-off, cavity pressure is slowly increased.t2-t9For pressure maintaining cooling stage, control device is pressed early period cooling to pressure maintaining at this stage
It is segmented according to identical time interval, t is obtained with this2-t3；t3-t4；t4-t5；t5-t6；t6-t7；t7-t8Totally six stages, t9
Indicate demoulding pickup operation, plastic, which is cooled to room temperature, after pickup measures Surface Shrink Marks of Plastic Parts value using measuring device, and is remembered
Record.Start to carry out second of injection molding later, injection molding operation early period is consistent, and extraneous gas is in t2-t3Start to intervene, to mould
Tool carries out gas injection pressure maintaining, and the cooling room temperature of plastic measures Surface Shrink Marks of Plastic Parts value using measuring device after pickup, and is recorded.It adopts
Take same method successively in t3-t4；t4-t5；t5-t6；t6-t7；t7-t8Interior progress extraneous gas assistant formation, records each modeling
The surface shrink mark value of part.The finally shrink mark value of more each plastic, so that it is determined that final gas injection occasion.Shrink mark minimum value institute is right
The gas injection occasion answered is ideal gas injection occasion needed for last produce in enormous quantities.When time interval is about small, time for being divided
Duan Yue is more, and corresponding gas injection occasion is more ideal, and the shrink mark value of generation is smaller, improves product quality to greatest extent.
Content of the present invention is only to enumerate to inventive concept way of realization, and protection scope of the present invention should not
It is seen as limited by concrete form described in embodiment, protection scope of the present invention is also only in those skilled in the art according to this
Inventive concept it is conceivable that equivalent technologies mean.
Claims (2)
1. a kind of extraneous gas aid injection molding method based on pressure measurement, comprising the following steps:
1) the type chamber in forming process and the pressure information between plastic surface are acquired
Pressure sensor (3) are installed on mold cavity surface, the multipoint pressure data between real-time acquisition type chamber and plastic surface,
And the pressure data measured is transferred to pressure treatment device (9) processing；
2) pressure versus time basis of reference is established
Pressure treatment device (9) is converted into electricity after being handled the pressure signal between detected type chamber and plastic surface
Signal is transmitted to control device (10) and is handled, and control device (10), will according to the pressure data and receiving time received
Pressure data foundation is fabricated to pressure versus time coordinate diagram, and carries out to time horizontal axis in coordinate diagram according to identical time interval
Segmentation finds corresponding pressure span, each pressure versus time region is set as ideal gas injection pressure-time zone, makees
For basis of reference, the partitioning standards of the time interval: chooses the cooling preliminary stage of pressure maintaining and divided；
3) suitable gas injection time region is selected
The plastic in one group of injection molding is chosen, in plastic injection molding process, reference that control device (10) obtains step 2
Each region signal in benchmark feeds back to the auxiliary pressure-regulating device of gas of the corresponding auxiliary control device of each gas (15) respectively
(11) obtained signal is sent to gas compressor (12) by output end, controls by input terminal, the auxiliary pressure-regulating device of gas (11)
The gas that gas compressor (12) processed sends out corresponding pressure enters storage in air accumulator (13), opens gas auxiliary switch device (14),
The gas of air accumulator (13) is subjected to gas injection to plastics by inlet channel (4) and air tube (6), after gas injection, depanning is each
Pickup measures the shrink mark depth value of plastic corresponding to each pressure versus time region by measuring device, and shrink mark depth value is minimum
Time as suitable gas injection time region；
4) when batch is molded plastic, the time in the gas injection time region that step 3) is obtained as gas injection time, that is, is being molded
After the completion, after being cooled to the time in gas injection time region, gas injection, assistant formation are carried out；
The control device (10) includes signal receiving device, signal processing apparatus and signal transmitting apparatus, signal receiving device
The pressure signal for coming from pressure treatment device (9) is received, pressure changes over time during establishing molding by signal processing apparatus
Statistical model, and data are depicted as pressure versus time coordinate diagram, and divide according to identical time interval time horizontal axis
It cuts, finds corresponding pressure span, each pressure versus time region is set as ideal gas injection region, then pass through signal transmitting apparatus
The ideal gas injection regional signal of setting is successively transmitted to the auxiliary control device of gas (15), outer auxiliary note is carried out by the auxiliary control device of gas
Gas；
It is characterized in that the signal of the auxiliary control device of gas (15) receiving control device (10) transmission controls gas compressor (12)
The high pressure gas of relevant pressure is exported, to complete the process of extraneous gas injection；The auxiliary pressure-regulating device of gas (11) is for adjusting
The parameter of gas compressor (12), to be produced into the gas of different pressures, gas auxiliary switch device (14) controls whether gas injection.
2. the extraneous gas aid injection molding method according to claim 1 based on pressure measurement, it is characterised in that pressure
Variation between force snesor (3) real-time monitoring type chamber and plastic surface, and each pressure signal is transferred to pressure treatment dress
(9) are set, be converted into electric signal transmission to control device (10) through pressure treatment device (9).
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| TW202116528A (en) * | 2019-10-30 | 2021-05-01 | 財團法人工業技術研究院 | Gas counter pressure system |
| CN113772927B (en) * | 2021-09-17 | 2023-04-07 | 安徽钦同瓶业有限公司 | Gas injection device capable of accurately controlling amount of glass oil bottle production mold and implementation method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1382579A (en) * | 2001-12-17 | 2002-12-04 | 北京联发中拓科技发展有限公司 | Gas aided injection mould apparatus |
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| CN104129039A (en) * | 2014-07-10 | 2014-11-05 | 浙江工业大学 | External gas assisted injection mould |
-
2016
- 2016-09-29 CN CN201610862680.7A patent/CN106273240B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1382579A (en) * | 2001-12-17 | 2002-12-04 | 北京联发中拓科技发展有限公司 | Gas aided injection mould apparatus |
Non-Patent Citations (2)
| Title |
|---|
| 气辅成型首次气体穿透的无网格模拟;孔倩，欧阳洁;《计算机与应用化学》;20070328;第24卷(第3期);第317-322页 * |
| 气辅注塑装置闭环控制系统;李义，梁继才，高桂天，张景民;《吉林大学学报》;20060131;第36卷(第1期);第52-56页 * |
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