CN101913225A - Spraying-free high-surface gloss traceless injection molding process for rear cover of digital camera - Google Patents
Spraying-free high-surface gloss traceless injection molding process for rear cover of digital camera Download PDFInfo
- Publication number
- CN101913225A CN101913225A CN2010102595314A CN201010259531A CN101913225A CN 101913225 A CN101913225 A CN 101913225A CN 2010102595314 A CN2010102595314 A CN 2010102595314A CN 201010259531 A CN201010259531 A CN 201010259531A CN 101913225 A CN101913225 A CN 101913225A
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- Prior art keywords
- mold
- mould
- abs
- digital camera
- rear cover
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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
- B29C45/72—Heating or cooling
- B29C45/73—Heating or cooling of the mould
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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
- B29C45/0001—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor characterised by the choice of material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2055/00—Use of specific polymers obtained by polymerisation reactions only involving carbon-to-carbon unsaturated bonds, not provided for in a single one of main groups B29K2023/00 - B29K2049/00, e.g. having a vinyl group, as moulding material
- B29K2055/02—ABS polymers, i.e. acrylonitrile-butadiene-styrene polymers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/34—Electrical apparatus, e.g. sparking plugs or parts thereof
- B29L2031/3481—Housings or casings incorporating or embedding electric or electronic elements
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L55/00—Compositions of homopolymers or copolymers, obtained by polymerisation reactions only involving carbon-to-carbon unsaturated bonds, not provided for in groups C08L23/00 - C08L53/00
- C08L55/02—ABS [Acrylonitrile-Butadiene-Styrene] polymers
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 spraying-free high-surface gloss traceless injection molding process for a rear cover of a digital camera. In the process, a raw material is PMMA/ABS, PC/ABS or a high surface gloss ABS material, an injection mold is made of die steel with the advantages of good polishing property, high purity, high mirror surface degree and small thermal deformation; the mold is provided with a conformal water channel close to a cavity, and the back of the mold is provided with a heat insulation layer or a gap is utilized for heat insulation, so that the mold has uniform temperature; and in the injection process, a mold temperature control process is adopted to control the temperature change of the mold. The process makes the surface of the rear cover of the digital camera have high gloss without welding line, flowing mark or sink mark defects, and does not need subsequent spraying procedure, so that the process is favorable for protecting environment and reducing the cost.
Description
Technical field
The present invention relates to field of domestic appliances manufacture technology, especially relate to a kind of spraying-free high-surface gloss traceless injection molding process that is used for rear cover of digital camera.
Background technology
At present, people no longer are satisfied with the appearance of the colorful fashion of various digital products, get up to the appreciation taste of its outward appearance and requirements of green environmental protection are also more and more higher.Because the sort of first injection molding machine shell in the past, and then the method for spraying, neither environmental protection, quality is also unstable, numerous international and domestic well-known manufacturers have abandoned out-of-date methods one after another, then seek a kind of novel forming technology technology, and this technology should make panel surface glossiness height and defectives such as weldless line, current mark and shrink mark, and need not follow-up spraying process, thereby to environmental protection and reduce cost very favourable.
Summary of the invention
In view of this; the object of the present invention is to provide a kind of spraying-free high-surface gloss traceless injection molding process that is used for rear cover of digital camera; make rear cover of digital camera surface gloss height and weldless line, current mark and shrink mark defective; and need not follow-up spraying process, thereby help environmental protection and reduce cost.
For achieving the above object, the present invention by the following technical solutions:
The spraying-free high-surface gloss traceless injection molding process that is used for rear cover of digital camera of the present invention, raw material adopt PMMA/ABS, PC/ABS or high-light ABS material when making, injection mold adopts that polishability is good, high-purity, high minute surface degree and the little mould steel of thermal deformation, mould is provided with the conformal water channel of die cavity, and increase thermal insulation layer at its back side or utilize the space heat insulation, so that mold temperature is even, in the injection moulding process, adopt mould temperature control technology controlling and process mold temperature to change.
Further, described mould temperature control technology comprises high temperature die heater, steam-heated quick mold technique or the electrically heated quick mold technique that adopts the oil heating.
The invention has the beneficial effects as follows:
Owing to adopt closely cooperating of glazed plastic material, high-gloss injection mold, mould temperature temperature control device and injection machine and Shooting Technique, thereby can produce thinner, the more fashion and the rear cover of digital camera of the spraying-free high-surface gloss traceless injection molding of environmental protection more.
Other advantages of the present invention, target and feature will be set forth to a certain extent in the following description, and to a certain extent, based on being conspicuous to those skilled in the art, perhaps can take a hint from the practice of the present invention to investigating hereinafter.
The specific embodiment
During concrete enforcement, should be noted that following each side:
One, exempts to spray the glazed plastic material
Realize that exempting to spray high light beam moulds, and at first needs to select for use the glazed plastic material.Require to generally comprise for this kind properties of materials: the flowability of material should be higher, so as better the copy mold surface, reduce and shear and improve weld bond; Certain scratch resistance need be arranged, and promptly case hardness will be got well, and general pencil hardness is more than H; The heat endurance of material will be got well, and is difficult for producing volatile matter.Particularly, improve hear resistance and reduce the generation that volatile matter can prevent to corrode mould and reduce the white mist of product surface for the flame retardant grade material; The glossiness of material itself will be got well; Should have excellent toughness and certain rigid, can be by the desired drop test of digital camera and other functional tests.
At present, exempt to spray main PMMA/ABS, PC/ABS or the high-light ABS material of adopting of injection moulding production of rear cover of digital camera.Wherein, the hardness of high-light ABS is minimum, and the hardness of PMMA/ABS is the highest, pencil hardness can reach 1H or more than.High light PMMA/ABS can also make semi-transparent effect, thus outward appearance and LED x ray fluoroscopy x function that realization is more dazzled.If require to use fire proofing, then can select halogen-free flame retardant PC/ABS for use.Rear cover of digital camera can require to select for use the material of different model according to difference.It is predicted that in the near future, digital product manufacturer will more be inclined to the high rigidity reinforcing material of selecting to be used for ultra-thin digital product, as Samsung first textile product of PMMA/ABS class.Because so both can satisfy the rigidity requirement of slim design, can keep high light outward appearance again.
Two, high-gloss injection mold
High-gloss injection mold selects for use Mould Machining all than common die higher requirement to be arranged from design, steel.The mould design aspect will be considered high temperature resistant design, be suitable for factors such as water route design and installation coupling.Water channel need be guaranteed to be rapidly heated and to lower the temperature, and makes mold temperature even, the general conformal water channel that adopts die cavity, and increase thermal insulation layer overleaf or utilize the space heat insulation.The mould gate design will reduce weld bond as much as possible, and helps exhaust and reduce shearing.To adopting the mould of oily heating die heater, gate size will be opened greatlyyer, will consider the requirement of high temperature to positions such as other row positions, cooperation and guiding, and note heat insulation or cooling and cooperation.Because mould inner surface requires to reach very high fineness (mirror effect), thereby die steel will be selected for use that polishability is good, high-purity, high minute surface degree and the little high-quality steel of thermal deformation, as the S136 of Sweden ASSAB, the NAK80 of Japanese Datong District.If moulding flame-retarding high-lustre material, mould steel also needs good corrosion resistance, the steel of the most handy S136 SUP or ad eundem.For the maintenance of high optical mode tool, note in use in time cleaning mold die joint and air discharge duct, in order to avoid cause exhaust bad.In addition, should not timing with special-purpose cleaning cloth or paper cleaning mold minute surface part, particularly during injection moulding flame-retarding high-lustre material, must remove and stick to the precipitate of die face, in order to avoid bad orders such as white mist occur.Also to clean die cavity after injection moulding is finished, and spray special-purpose antirust oil with scavenger specially.
Three, mould temperature control technology
Accurately control mould temperature is to realize exempting to spray the molded big key of high light beam, and it is following several to use more temperature control technology to have at present:
1. with the oily high temperature die heater that heats.The mould temperature can be maintained steady temperature all the time, and advantage is that cost is low, easy to use, but will think about the processing of weld bond in the mould design, and the flowability to material requires also higher relatively simultaneously.This kind die heater is mainly used in the product low slightly to appearance requirement.
2. steam-heated quick mould technology.This is a kind of technology that early is used for the moulding of plastics high-light no-trace, and its technological principle is: before matched moulds and in the matched moulds process mould is carried out steam and heat, after matched moulds was finished, temperature reached and imposes a condition and can inject; Mould continues to keep high temperature in the injection process, can make sizing material keep well mobile like this in mold filling process; Injection is finished, and when pressurize is cooled off,,, enhances productivity so that shorten the cool time of goods to the mould processing of lowering the temperature with water at low temperature.
This arts demand boiler produces the steam of q.s fast, and can with the interlocking of injection machine signal, realize closed-loop control, also require material thermal resistance and compatibility good in addition.Adopt this technology, the mould temperature can reach very high temperature, does not have the weld bond problem, can improve product surface hardness simultaneously.But, limited the use of this technology because the boiler input is bigger.The fast cold fast hot all-in-one of boiler has appearred need not for this reason, in the market.
3. electrically heated quick mould technology.This technology is with the E-MOLD(Electricity Mold of Korea S NADA company) system is representative, can realize the temperature control of superhigh temperature mould, is the latest developments of Fast Heating cooling forming technology.It is very high that this technology utilizes electrical heating at short notice the surface temperature of mould to be heated to, and can drop to temperature below 50 ℃ again within tens seconds then, thereby help that high light beam is molded to be finished smoothly.The E-mold technology is easy to use, by controller control mould temperature, utilizes cold water to carry out mold cools down.When goods were got in the mould die sinking, core began heating.The temperature of heating region is not consistently, but decides according to the design of positions such as cast gate.When mould was closed, heating was finished, and injection injection moulding simultaneously begins.By transient heating, rising mould temperature, flow of sol improves greatly when making injection, thus pressure forming that can be lower.Lower injection pressure means the internal stress that has reduced goods, and then makes the hear resistance of goods and back processability be improved.The more important thing is that Resin Flow improves, pressure falls and will reduce, and makes product not be prone to cold burden and causes the surface defectives such as weld bond, current mark to occur, has improved product quality greatly.The E-mold technology has been widely used in the moulding of casing of domestic electrical equipment at present, day by day becomes main flow.
4. other mould temperature control technology.Comprise high-frequency electromagnetic induction heating system, infrared radiant heating system and other mould temperature control systems that adopt the high pressure water temperature machine of Korea S TITAN technology, also in high light beam is molded, obtained application.Though their mode of heating differences, control principle is similar, and respectively pluses and minuses is arranged.
Four, injection machine and Shooting Technique
Exempt to spray high light beam molding technology less demanding to injection machine, but higher, so that feedback signal real-time, and work with mould temperature control equipment coordination to the reaction sensitivity and the stability requirement of machine.Injection machine preferably is equipped with the strong screw rod of plasticizing capacity, requires screw rod as far as possible little to the shearing of material simultaneously.High light beam is moulded technology controlling and process to be had than big-difference with mould structure and the different of mould temperature equipment according to different product, but generally should follow following principle: adopt high mold temperature as far as possible, when adopting Steam Heating mould or E-MOLD technology, the mould regional area can reach 150 ℃ or higher; For copy mold surface better, forming temperature should be suitably higher, and injection pressure should be as far as possible more greatly; Be smooth exhaust, need to adopt multistage injection moulding speed; The injection moulding speed of the adjustment of any technology such as screw speed, different phase etc. all will consider to reduce the shearing of material.
Explanation is at last, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, other modifications that those of ordinary skills make technical scheme of the present invention or be equal to replacement, only otherwise break away from the spirit and scope of technical solution of the present invention, all should be encompassed in the middle of the claim scope of the present invention.
Claims (2)
1. the spraying-free high-surface gloss traceless injection molding process that is used for rear cover of digital camera, it is characterized in that: raw material adopt PMMA/ABS, PC/ABS or high-light ABS material during making, injection mold adopts that polishability is good, high-purity, high minute surface degree and the little mould steel of thermal deformation, mould is provided with the conformal water channel of die cavity, and increase thermal insulation layer at its back side or utilize the space heat insulation, so that mold temperature is even, in the injection moulding process, adopt mould temperature control technology controlling and process mold temperature to change.
2. the spraying-free high-surface gloss traceless injection molding process that is used for rear cover of digital camera according to claim 1 is characterized in that: described mould temperature control technology comprises high temperature die heater, steam-heated quick mold technique or the electrically heated quick mold technique that adopts the oil heating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102595314A CN101913225A (en) | 2010-08-23 | 2010-08-23 | Spraying-free high-surface gloss traceless injection molding process for rear cover of digital camera |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102595314A CN101913225A (en) | 2010-08-23 | 2010-08-23 | Spraying-free high-surface gloss traceless injection molding process for rear cover of digital camera |
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| Publication Number | Publication Date |
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| CN101913225A true CN101913225A (en) | 2010-12-15 |
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| CN2010102595314A Pending CN101913225A (en) | 2010-08-23 | 2010-08-23 | Spraying-free high-surface gloss traceless injection molding process for rear cover of digital camera |
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102205594A (en) * | 2011-05-11 | 2011-10-05 | 慈溪市盛艺模具有限公司 | Steam type highlight and traceless injection-molding and forming process for complex precise product |
| CN103538201A (en) * | 2012-07-17 | 2014-01-29 | 贵州华昌群建模塑有限公司 | Assisting type steam highlight traceless injection moulding process of front housing of large-size LED (Light Emitting Diode) television |
| CN105313276A (en) * | 2014-07-29 | 2016-02-10 | 韩冰 | Production method for scratch-resistant high-gloss plastic injection product |
| CN105365173A (en) * | 2015-12-11 | 2016-03-02 | 滁州市博康模具塑料有限公司 | Quick thermoplastic forming process |
| 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 |
| WO2016107004A1 (en) * | 2014-12-31 | 2016-07-07 | 四维尔丸井(广州)汽车零部件有限公司 | Highlight piano black mirror injection moulding method and injection system therefor |
| CN105835300A (en) * | 2016-06-15 | 2016-08-10 | 惠州市鸿利达精密部件有限公司 | High fineness and no-weldlines injection moulding process |
| CN106738667A (en) * | 2016-11-26 | 2017-05-31 | 滁州市荣康塑料制品有限公司 | For the spraying-free high-surface gloss traceless injection molding process of LED television fore shell |
| CN106947209A (en) * | 2017-03-28 | 2017-07-14 | 昕亮科技（深圳）有限公司 | High-light no-trace ABS/PMMA materials and preparation method thereof |
| CN108582632A (en) * | 2017-12-13 | 2018-09-28 | 苏州富顺新型包装材料股份有限公司 | A kind of production technology of polypropylene product and its application |
| CN109747132A (en) * | 2019-01-15 | 2019-05-14 | 象山华鹰塑料工程有限公司 | A kind of production technology of glass bloom cover board one-pass molding radian |
| CN110733159A (en) * | 2018-07-20 | 2020-01-31 | 苏睦泽 | method for removing weld line in imitation metal effect spray-free material processing and forming |
| CN112250984A (en) * | 2020-08-28 | 2021-01-22 | 东莞市建荣电子塑胶有限公司 | Injection molding process of automotive interior trim part |
| CN112297330A (en) * | 2020-09-29 | 2021-02-02 | 上汽通用五菱汽车股份有限公司 | Manufacturing method of highlight part |
| CN115871160A (en) * | 2022-12-23 | 2023-03-31 | 上海布鲁可积木科技有限公司 | Mold and injection molding method for eliminating flow marks on the surface of spray-free thermoplastic products |
| EP4495176A1 (en) * | 2023-07-21 | 2025-01-22 | Roquette Freres | Diesters of isosorbide and their use as processing aids and plasticizers in abs compositions |
-
2010
- 2010-08-23 CN CN2010102595314A patent/CN101913225A/en active Pending
Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102205594A (en) * | 2011-05-11 | 2011-10-05 | 慈溪市盛艺模具有限公司 | Steam type highlight and traceless injection-molding and forming process for complex precise product |
| CN102205594B (en) * | 2011-05-11 | 2014-03-26 | 慈溪市盛艺模具有限公司 | Steam type highlight and traceless injection-molding and forming process for complex precise product |
| CN103538201A (en) * | 2012-07-17 | 2014-01-29 | 贵州华昌群建模塑有限公司 | Assisting type steam highlight traceless injection moulding process of front housing of large-size LED (Light Emitting Diode) television |
| CN105313276A (en) * | 2014-07-29 | 2016-02-10 | 韩冰 | Production method for scratch-resistant high-gloss plastic injection product |
| WO2016107004A1 (en) * | 2014-12-31 | 2016-07-07 | 四维尔丸井(广州)汽车零部件有限公司 | Highlight piano black mirror injection moulding method and injection system therefor |
| CN105799112A (en) * | 2014-12-31 | 2016-07-27 | 四维尔丸井(广州)汽车零部件有限公司 | Injection molding method and system for highlight piano black mirror surface |
| CN105365173A (en) * | 2015-12-11 | 2016-03-02 | 滁州市博康模具塑料有限公司 | Quick thermoplastic forming process |
| 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 |
| CN105835300A (en) * | 2016-06-15 | 2016-08-10 | 惠州市鸿利达精密部件有限公司 | High fineness and no-weldlines injection moulding process |
| CN106738667A (en) * | 2016-11-26 | 2017-05-31 | 滁州市荣康塑料制品有限公司 | For the spraying-free high-surface gloss traceless injection molding process of LED television fore shell |
| CN106947209A (en) * | 2017-03-28 | 2017-07-14 | 昕亮科技（深圳）有限公司 | High-light no-trace ABS/PMMA materials and preparation method thereof |
| CN106947209B (en) * | 2017-03-28 | 2019-02-22 | 昕亮科技（深圳）有限公司 | High-light no-trace ABS/PMMA material and preparation method thereof |
| CN108582632A (en) * | 2017-12-13 | 2018-09-28 | 苏州富顺新型包装材料股份有限公司 | A kind of production technology of polypropylene product and its application |
| CN110733159A (en) * | 2018-07-20 | 2020-01-31 | 苏睦泽 | method for removing weld line in imitation metal effect spray-free material processing and forming |
| CN109747132A (en) * | 2019-01-15 | 2019-05-14 | 象山华鹰塑料工程有限公司 | A kind of production technology of glass bloom cover board one-pass molding radian |
| CN112250984A (en) * | 2020-08-28 | 2021-01-22 | 东莞市建荣电子塑胶有限公司 | Injection molding process of automotive interior trim part |
| CN112250984B (en) * | 2020-08-28 | 2021-08-20 | 东莞市建荣电子塑胶有限公司 | Injection molding process of automotive interior trim part |
| CN112297330A (en) * | 2020-09-29 | 2021-02-02 | 上汽通用五菱汽车股份有限公司 | Manufacturing method of highlight part |
| CN115871160A (en) * | 2022-12-23 | 2023-03-31 | 上海布鲁可积木科技有限公司 | Mold and injection molding method for eliminating flow marks on the surface of spray-free thermoplastic products |
| EP4495176A1 (en) * | 2023-07-21 | 2025-01-22 | Roquette Freres | Diesters of isosorbide and their use as processing aids and plasticizers in abs compositions |
| WO2025021310A1 (en) * | 2023-07-21 | 2025-01-30 | Roquette Freres | Diesters of isosorbide and their use as processing aids and plasticizers in abs compositions |
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Application publication date: 20101215 |