CN102029695B - Sharp quenching and sharp heating highlight molding technology of die - Google Patents
Sharp quenching and sharp heating highlight molding technology of die Download PDFInfo
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- CN102029695B CN102029695B CN 201010544123 CN201010544123A CN102029695B CN 102029695 B CN102029695 B CN 102029695B CN 201010544123 CN201010544123 CN 201010544123 CN 201010544123 A CN201010544123 A CN 201010544123A CN 102029695 B CN102029695 B CN 102029695B
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- 238000000465 moulding Methods 0.000 title abstract description 21
- 238000005516 engineering process Methods 0.000 title abstract description 10
- 238000010791 quenching Methods 0.000 title abstract 5
- 230000000171 quenching effect Effects 0.000 title abstract 5
- 238000001746 injection moulding Methods 0.000 claims abstract description 32
- 229920003023 plastic Polymers 0.000 claims abstract description 27
- 239000004033 plastic Substances 0.000 claims abstract description 27
- 238000002347 injection Methods 0.000 claims abstract description 14
- 239000007924 injection Substances 0.000 claims abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 32
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- 230000000694 effects Effects 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 4
- 229920006491 ABS+PC Polymers 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 230000006872 improvement Effects 0.000 description 2
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Landscapes
- Moulds For Moulding Plastics Or The Like (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses a sharp quenching and sharp heating highlight molding technology of a die, belonging to the field of injection molding technology. The technology comprises the following steps: 1. sharp heating control stage of die temperature; 2. plastic injection step; 3. sharp quenching step of die temperature; and 4. die sinking step. The invention solves the appearance quality problems that the produced products have conjugation lines, flow liners, indenture and the like because the injection molding technology in the prior art can not realize the purposes of sharp quenching and sharp heating of the die. The invention provides a sharp quenching and sharp heating highlight molding technology of dies, the quick switch of die temperature reaches the temperature requirement suitable for different stages in the injection molding process, the conjugation lines on the surface of the plastic product can be effectively reduced, the surface of a product containing glass fibre does not generate floated fiber, the product texture with a texture surface is clear, and the gloss of the product surface of the highlight-surface product can be improved.
Description
Technical field
The invention belongs to the injection molding process field, particularly relate to the high Seterolithography technique of a kind of mold thermal shock.
Background technology
Injection moulding all is widely used in industrial every field as one of forming method important in the plastic processing.The product of and high request particularly little along with the appearance of 3C and high-tech product is more and more, show the appearance of product such as various optics, people are more and more higher to the requirement of precision, surface quality and the intensity of plastic product, and injection molding technology has run into unprecedented challenge.At present the shell body injection molding process is that molten plastic is injected in the mold cavity, forms required shell product after the cooling, the shell product be reach eject temperature after opening mold take out product.When adopting conventional injection molding technology to produce, tend to suffer from the problem, particularly apparent product surface smoothness problem of many moulding, defectives such as joint line, surface brightness, flow liner, indenture.
In general, these problems reach improvement in the mode that general ejection formation industry generally adopts for improving mold temperature, tend to cause the prolongation formed product cycle yet improve mold temperature, increase the product stripping difficulty, fall end production efficiency etc.Simultaneously in order to cover up the blemish of shell product, may carry out secondary operations to shell product surface spraying, adopt the surface spraying technology, not only waste raw materials for production, waste energy, increase the production cost of injecting products, and cause serious environmental pollution, endanger operating personnel's health of human body.
Summary of the invention
Can not realize being rapidly heated of mould and fast cooling in order to solve in the prior art injection molding process, so that there are the appearance qualities such as joint line, flow liner, indenture in the product of producing, the invention provides the high Seterolithography technique of a kind of mold thermal shock, reach the temperature requirement that different phase was fit in the injection molding manufacture procedure by the quick switching of mold temperature.
In order to achieve the above object, the technical solution used in the present invention is:
The high Seterolithography technique of a kind of mold thermal shock is characterized in that: may further comprise the steps:
1), the mold temperature instant heating control stage: provide the die sinking signal by injection moulding machine, boiler carries high-temperature vapour to enter in the mould vapor line, this moment, the force value of steam pressure was 10 MPA-12 MPA, steam temperature is 160 ° of C-170 ° of C, filling the steam time is 12 seconds-18 seconds, guarantee that mold temperature reaches between 125 ° of C-145 ° C and utilizes steam to keep, and allows plastic injection with signal feedback to injection moulding machine simultaneously;
2), the plastic injection stage: plastic melt enters mold cavity, and after injection moulding was finished, boiler stopped to supply with steam, compressed air enters in the mould vapor line simultaneously, this moment, compressed air pressure was 8MPA, removed because steam heat energy discharges the condensed water that produces, and reclaimed;
3), the mold temperature rapid cooling stage: after removing condensed water, frozen water enters in the mould vapor line, this moment, the frozen water force value was 4.5 MPA-6 MPA, the frozen water temperature is spent 10 seconds-15 seconds water time between 8 ° of C-12 ° C, reduce rapidly between mold temperature to the 60 ° C-70 ° C, in the mould vapor line, pass into compressed air again, this moment, compressed-air actuated pressure was 8MPA, and gassing time 6 seconds-10 seconds is removed residual ponding in the mould pipeline.
4), the mould die sinking stage: injection moulding machine die sinking, the product in the taking-up mould.
The high Seterolithography technique of aforesaid a kind of mold thermal shock is characterized in that: described boiler is the 2T steam boiler.
The high Seterolithography technique of aforesaid a kind of mold thermal shock is characterized in that: described mould vapor line inlet pipe caliber 108mm, return-air caliber 76mm.
The invention has the beneficial effects as follows: the high Seterolithography technique of mold thermal shock of the present invention, in the steam pipework of mould, use the high pressure high temperature vapor rapidly heating moulds to higher temperature before the injection moulding, after finishing, injection moulding stops to supply with steam, utilize frozen water to the mould fast cooling, low like this mould temperature die sinking is when avoiding from mould, the too high distortion that causes of mould temperature or drawing-die reduce mold temperature rapidly with frozen water, have also shortened the formed product cycle.When moulding, also can eliminate simultaneously weld mark and current mark that injecting products produces, improve bond strength, eliminate residual stress, improve the lustrous surface of material, improve the product appearance quality, strengthen molding effect.Injecting products also need not to carry out the secondary operations operation in addition, and properties of product are better, and cost is also lower.Mould type cavity temperature of the present invention remains between 125 ° of C-145 ° C, can lengthen length of flow better combination in die cavity of plastics, guarantees best outward appearance and the precision of moulding, and is more effective to thin moulding.
The specific embodiment
Embodiment 1
1. the mold temperature instant heating is controlled the stage: provide signal (die sinking signal) by injection moulding machine, the 2T steam boiler enters high-temperature vapour in the mould vapor line, this moment, the steam pressure force value was 10MPA, 160 ° of C of steam temperature, fill 12 seconds steam time, the folding mould adds take-off time and adds up to 10 seconds, guarantee that mold temperature reaches 125 ° of C after, feed back to injection moulding machine and allow plastic injection, and carry out the high temperature maintenance.
2. plastic injection stage: the ABS+PC plastic material enters die cavity, because of the mould type cavity temperature at 125 degree, can lengthen length of flow better combination in die cavity of plastics, guarantee best outward appearance and the precision of moulding.Compressed air enters in the mould vapor line simultaneously, and this moment, compressed air pressure was 8MPA, and gassing time is 5 seconds.Remove steam and discharge the condensed water that produces because of heat energy, and reclaim.
3. mold temperature rapid cooling stage: after plastic injection was finished, frozen water entered in the mould vapor line, and this moment, the frozen water force value was 4.5MPA, and the frozen water temperature is spent 10 seconds water time at 9 ° of C.Reduce rapidly mold temperature to 65 ° C.Compressed air enters in the mould vapor line subsequently, and this moment, compressed air pressure was 8MPA, gassing time 10 seconds.Remove residual ponding in the pipeline.Low mould temperature die sinking when avoiding from mould, the too high distortion that causes of mould temperature or drawing-die.Reduce rapidly mold temperature with frozen water, in order to avoid affect molding cycle.18 seconds injection moulding machines of wait provided the die sinking signal after cooling was finished.
4. mould die sinking stage: the injection moulding machine die sinking, take out the product in the mould, enter next mould circulation (55 seconds cycle time).
The technique effect of the present embodiment: because of steam pressure lower, inflationtime is lower, mold temperature is lower, make partially dark-1.5(Customer Standard of product surface brightness :+/-1.0), there is joint line because of mold temperature than low production LOGO place simultaneously, the deformation of products degree meets the requirements+the 3.5mm(Customer Standard: in+the 10mm-0mm), the product overall dimensions meets the requirements at middle limit+0.35mm(Customer Standard :+/-1.0mm in), molding cycle time 58 seconds/mould (in client's molding cycle standard 55 seconds-65 seconds), the product production capacity can meet the requirements, but there are certain gap in integral product state (brightness, degree of deformation, size) and customer requirement.
Embodiment 2
1. the mold temperature instant heating is controlled the stage: provide signal (die sinking signal) by injection moulding machine, the 2T steam boiler enters high-temperature vapour in the mould vapor line, this moment, the steam pressure force value was 12MPA, 170 ° of C of steam temperature, fill 15 seconds steam time, the folding mould adds take-off time and adds up to 10 seconds, guarantee that mold temperature reaches 140 ° of C after, feed back to injection moulding machine and allow plastic injection, and carry out the high temperature maintenance.
2. plastic injection stage: the ABS+PC plastic material enters die cavity, because of the mould type cavity temperature at 140 ° of C, can lengthen length of flow better combination in die cavity of plastics, guarantee best outward appearance and the precision of moulding.Compressed air enters in the mould vapor line simultaneously, and this moment, compressed air pressure was 8MPA, and gassing time is 5 seconds.Remove steam and discharge the condensed water that produces because of heat energy, and reclaim.
3. mold temperature rapid cooling stage: after plastic injection was finished, frozen water entered in the mould vapor line, and this moment, the frozen water force value was 4.5MPA, and the frozen water temperature is spent 12 seconds water time at 10 ° of C.Reduce rapidly mold temperature to 65 ° C.Compressed air enters in the mould vapor line subsequently, and this moment, compressed air pressure was 8MPA, gassing time 10 seconds.Remove residual ponding in the pipeline.Low mould temperature die sinking when avoiding from mould, the too high distortion that causes of mould temperature or drawing-die.Reduce rapidly mold temperature with frozen water, in order to avoid affect molding cycle.18 seconds injection moulding machines of wait provided the die sinking signal after cooling was finished.
4. mould die sinking stage: the injection moulding machine die sinking, take out the product in the mould, enter next mould circulation.(60 seconds cycle time)
The technique effect of the present embodiment: steam intensification this moment effect reaches optimum state, the product brightness well reaches+the 0.7(Customer Standard :+/-1.0), the deformation of products degree is good+the 7.5mm(Customer Standard: in+the 10mm-0mm), the product overall dimensions middle limit+0.15mm(Customer Standard that meets the requirements :+/-1.0mm in), molding cycle time 60 seconds/mould (in client's molding cycle standard 55 seconds-65 seconds) can meet the requirements of the customers fully, is the state of ideal.
Embodiment 3
1. the mold temperature instant heating is controlled the stage: provide signal (die sinking signal) by injection moulding machine, the 2T steam boiler enters high-temperature vapour in the mould vapor line, this moment, the steam pressure force value was 12MPA, 170 ° of C of steam temperature, fill 18 seconds steam time, the folding mould adds take-off time and adds up to 10 seconds, guarantee that mold temperature reaches 145 ° of C after, feed back to injection moulding machine and allow plastic injection, and carry out the high temperature maintenance.
2. plastic injection stage: the ABS+PC plastic material enters die cavity, because of the mould type cavity temperature at 145 ° of C, can lengthen length of flow better combination in die cavity of plastics, guarantee best outward appearance and the precision of moulding.Compressed air enters in the mould vapor line simultaneously, and this moment, compressed air pressure was 8MPA, and gassing time is 5 seconds.Remove steam and discharge the condensed water that produces because of heat energy, and reclaim.
3. mold temperature rapid cooling stage: after plastic injection was finished, frozen water entered in the mould vapor line, and this moment, the frozen water force value was 4.5MPA, and the frozen water temperature is spent 15 seconds water time at 10 ° of C.Reduce rapidly mold temperature to 65 ° C.Compressed air enters in the mould vapor line subsequently, and this moment, compressed air pressure was 8MPA, gassing time 10 seconds.Remove residual ponding in the pipeline.Low mould temperature die sinking when avoiding from mould, the too high distortion that causes of mould temperature or drawing-die.Reduce rapidly mold temperature with frozen water, in order to avoid affect molding cycle.The wait injection moulding machine provided the die sinking signal after cooling was finished.
4. mould die sinking stage: the injection moulding machine die sinking, take out the product in the mould, enter next mould circulation.(66 seconds cycle time)
The technique effect of the present embodiment: this moment, steam intensification effect reached high state, the product brightness is good+the 0.9(Customer Standard :+/-1.0), deformation of products is spent greatly+the 11.5mm(Customer Standard: in+the 10mm-0mm), be of the required size at lower limit-0.25mm(Customer Standard :+/-1.0mm in), long 72 seconds/mould (in client's molding cycle standard 55 seconds-65 seconds) brightness and size conforms customer requirement of molding cycle time, but deformation of products is spent large and the molding cycle overlong time can't be reached customer requirement.
Above demonstration and described basic principle of the present invention and principal character and advantage of the present invention.The technical staff of the industry should understand; the present invention is not restricted to the described embodiments; that describes in above-described embodiment and the specification just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.The claimed scope of the present invention is defined by appending claims and equivalent thereof.
Claims (1)
1. high Seterolithography technique of mold thermal shock is characterized in that: may further comprise the steps:
1), the mold temperature instant heating control stage: provide the die sinking signal by injection moulding machine, the 2T steam boiler carries high-temperature vapour to enter in the mould vapor line, this moment, the force value of steam pressure was 10 MPA-12 MPA, steam temperature is 160 ° of C-170 ° of C, filling the steam time is 12 seconds-18 seconds, guarantee that mold temperature reaches between 125 ° of C-145 ° C and utilizes steam to keep, and allows plastic injection with signal feedback to injection moulding machine simultaneously;
2), the plastic injection stage: plastic melt enters mold cavity, and after injection moulding was finished, the 2T steam boiler stopped to supply with steam, compressed air enters in the mould vapor line simultaneously, this moment, compressed air pressure was 8MPA, removed because steam heat energy discharges the condensed water that produces, and reclaimed;
3), mold temperature depression of order section rapidly: after removing condensed water, frozen water enters in the mould vapor line, mould vapor line inlet pipe caliber 108mm, return-air caliber 76mm, this moment, the frozen water force value was 4.5 MPA-6 MPA, the frozen water temperature is between 8 ° of C-12 ° C, spend 10 seconds-15 seconds water time, reduce rapidly between mold temperature to the 60 ° C-70 ° C, pass into compressed air again in the mould vapor line, this moment, compressed-air actuated pressure was 8MPA, gassing time 6 seconds-10 seconds, remove residual ponding in the mould pipeline
4), the mould die sinking stage: injection moulding machine die sinking, the product in the taking-up mould.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201010544123 CN102029695B (en) | 2010-11-15 | 2010-11-15 | Sharp quenching and sharp heating highlight molding technology of die |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201010544123 CN102029695B (en) | 2010-11-15 | 2010-11-15 | Sharp quenching and sharp heating highlight molding technology of die |
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| CN102029695A CN102029695A (en) | 2011-04-27 |
| CN102029695B true CN102029695B (en) | 2013-02-06 |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102990881A (en) * | 2012-12-12 | 2013-03-27 | 江阴标榜汽车部件有限公司 | Water-assisted injection molding process method |
| CN105313276A (en) * | 2014-07-29 | 2016-02-10 | 韩冰 | Production method for scratch-resistant high-gloss plastic injection product |
| CN105291337B (en) * | 2015-11-30 | 2018-01-30 | 无锡锦和科技有限公司 | A kind of energy-saving heating cooling second time of foaming machine |
| CN105437485B (en) * | 2015-12-08 | 2017-12-08 | 深圳天珑无线科技有限公司 | Improve the mechanism and method of plastic cement products joint line |
| CN105538603A (en) * | 2015-12-11 | 2016-05-04 | 滁州市博康模具塑料有限公司 | Novel gas-assisted forming technique |
| CN105619733A (en) * | 2015-12-30 | 2016-06-01 | 江阴道达汽车饰件有限公司 | Quick heating and cooling mold highlight injection molding technology |
| CN106113338B (en) * | 2016-06-21 | 2018-08-24 | 欧宝聚合物江苏有限公司 | The surface-brightening processing method of non-injection grade thermoplastic plastic injecting part |
| CN110328829B (en) * | 2019-05-22 | 2021-11-02 | 江阴名鸿车顶系统有限公司 | Spoiler highlight blow molding process |
| CN111690244A (en) * | 2020-05-25 | 2020-09-22 | 上海长伟锦磁工程塑料有限公司 | High-gloss scratch-resistant chemical-resistant PC/polyester alloy material and preparation method thereof |
| CN114074452B (en) * | 2020-08-21 | 2024-03-19 | 汉达精密电子(昆山)有限公司 | Vapor compressed gas combined quenching and rapid heating system and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP4486117B2 (en) * | 2007-10-23 | 2010-06-23 | 株式会社富士精工 | Injection molding method |
| CN101444952B (en) * | 2007-11-27 | 2012-07-11 | 北京中拓机械有限责任公司 | Method for rapid controlling the temperature variation of an injection mold |
| JP2010012682A (en) * | 2008-07-03 | 2010-01-21 | Shisuko:Kk | Multi-heating/cooling system of mold |
| CN101830060A (en) * | 2010-04-28 | 2010-09-15 | 深圳市宝川实业有限公司 | Quick heating and cooling highlight seamless die heater |
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