CN102407587B - Injection molding process for polyphenylene oxide (PPO) plastic air conditioner shell - Google Patents

Injection molding process for polyphenylene oxide (PPO) plastic air conditioner shell Download PDF

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Publication number
CN102407587B
CN102407587B CN201010291244.1A CN201010291244A CN102407587B CN 102407587 B CN102407587 B CN 102407587B CN 201010291244 A CN201010291244 A CN 201010291244A CN 102407587 B CN102407587 B CN 102407587B
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China
Prior art keywords
injection
pressurize
ppo
heated
pretreatment
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CN201010291244.1A
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Chinese (zh)
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CN102407587A (en
Inventor
张志林
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上海浦东美灵塑料制品有限公司
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Publication of CN102407587A publication Critical patent/CN102407587A/en
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Abstract

The invention discloses an injection molding process for a polyphenylene oxide (PPO) plastic air conditioner shell. The process comprises the following steps of: (1) pretreating a raw material; (2) pretreating an injection molding system and an injection mold; (3) plasticizing; (4) injecting; (5) keeping pressure; (6) cooling for molding; and (7) demolding. The process is simple in implementation steps, the molding cycle is effectively shortened, and production cost is effectively reduced; meanwhile, the quality of a finished product prepared by the process is effectively improved through corresponding process conditions.

Description

A kind of PPO plastics air-conditioner housing Shooting Technique
Technical field
The present invention relates to injection moulding field, be specifically related to a kind of Shooting Technique.
Background technology
Injection moulding is a kind of method of industrial products production moulding.Product is used rubber injection mold and plastic injection-moulded conventionally.Injection moulding also can divide injection mould platen press. and casting die.Injection (mo(u)lding) machine (being called for short injector or injection machine) is to utilize mould for plastics to make the main former of the plastic products of various shapes thermoplastic or thermosetting material, and injection moulding realizes by injection machine and mould.
For meeting consumer for the aesthetic requirement of air-conditioner housing outward appearance, simultaneously also for environmental protection more, adopting spraying-free high-surface gloss traceless injection molding technology to produce air-conditioner housing becomes main flow day by day.The generation of this technology and development be unable to do without development and the innovation of plastics forming technique, have contained the many aspects such as glazed plastic material, high-gloss injection mold, mould temperature temperature control device.
In recent years, people are no longer satisfied with the use function of air-conditioning, more and more higher to the requirement of the appreciation taste of its outward appearance and environmental protection.Because traditional injection moulding process is first injection moulding air-conditioner housing, 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 adopt a kind of novel forming technology---spraying-free high-surface gloss traceless injection molding technology.This technology can make the high and defect such as weldless line, current mark and shrink mark of air-conditioner housing surface gloss, and without follow-up spraying process, thereby very favourable to environmental protection and cost.Owing to exempting to spray the enforcement of high light injection molding technology, be unable to do without closely cooperating of glazed plastic material, high-gloss injection mold, mould temperature temperature control device and injection machine and Shooting Technique.
But existing Shooting Technique also exists certain defect in implementation process, as processing step is complicated, the cycle is long and high in cost of production defect, the end product quality of existing technique is not high simultaneously, is difficult to meet people's making requirement.
Summary of the invention
The present invention is in order to solve the existing defect of existing Shooting Technique, and a kind of novel injection molding process is provided, this process implementing step is simple, effectively reduces molding cycle and production cost, by corresponding process conditions, effectively improve the end product quality of this technique simultaneously.
In order to achieve the above object, the present invention adopts following step:
A PPO plastics air-conditioner housing Shooting Technique, this technique is implemented based on corresponding adapted to injection system and injection mold, and described technique comprises the steps:
(1) pretreatment of raw material: utilize baking oven to carry out 3 hours dry to PPO plastics, and by PPO plastic heating to 75 ℃-95 ℃;
(2) adapted to injection system and injection mold pretreatment: the barrel in adapted to injection system is heated to 200 ℃-260 ℃, and the hot flow path in adapted to injection system is heated to 230 ℃-260 ℃; Cover half in injection mold is heated to 65 ℃-75 ℃, and dynamic model is heated to 45 ℃-55 ℃;
(3) plasticizing: the good PPO plastics of step (1) pretreatment are added in the barrel of processing through step (2), be heated to molten condition;
(4) injection: the nozzle by the PPO plastics of molten condition by the hot flow path through step (2) processing is expelled in the mould after heating, and injection pressure is 100kg/cm 2-120kg/cm 2;
(5) pressurize: carry out pressurize by even injection;
(6) cooling forming: the time of cooling forming is 38s;
(7) demoulding: demoulding while hot.
In described step (5), carry out pressurize and be divided into three phases: the pressure of first stage pressurize is 67kg/cm 2, the dwell time is 2s; The pressure of second stage pressurize is 77kg/cm 2, the dwell time is 3s; The pressure of phase III pressurize is 86kg/cm 2-105kg/cm 2, the dwell time is 5-8s.
The Shooting Technique obtaining according to technique scheme has the following advantages:
(1) this processing step is simply convenient to realize;
(2) save material, reduce costs;
(3) shorten molding cycle, improve machine efficiency;
(4) improve products surface quality and mechanical property;
(5) improve automaticity;
(6) improve injection-molded item surface aesthetic degree.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, further illustrate the present invention.
Fig. 1 is flow chart of the present invention;
The specific embodiment
For technological means, creation characteristic that the present invention is realized, reach object and effect is easy to understand, below in conjunction with concrete diagram, further set forth the present invention.
Injection molding process provided by the invention can be used for the injection mo(u)lding of air-conditioner housing, and it is implemented based on corresponding adapted to injection system and injection mold.
Adapted to injection system in the present invention is to utilize TOP-TIP to carry out injection moulding, and for the design feature of air-conditioner housing, the hot flow path work point in the present invention is 21 groups.
And injection mold is mainly comprised of dynamic model and cover half.
For above-mentioned situation, being specifically implemented as follows of its Shooting Technique (referring to Fig. 1):
(1) pretreatment of raw material
This step utilizes baking oven to carry out 3 hours dry to PPO plastics, and by PPO plastic heating to 75 ℃-95 ℃.
(2) injection machine and mould pretreatment
Barrel in adapted to injection system has 7, and all barrels are carried out to heat treated, makes each barrel reach respectively corresponding temperature (temperature difference is ± 10 ℃):
1、225℃;2、245℃;3、250℃;4、250℃;5、235℃;6、225℃;7、210℃。
21 groups of hot flow paths are heated to respectively to corresponding temperature (temperature difference is ± 10 ℃)
1、250℃;2、250℃;3、250℃;4、250℃;5、250℃;6、250℃;7、250℃;8、250℃;9、250℃;10、250℃;11、250℃;12、250℃;13、250℃;14、240℃;15、240℃;16、240℃;17、240℃;18、240℃;19、240℃;20、240℃;21、240℃。
Fixed half and moving half in injection mold is heated to respectively to corresponding temperature (temperature difference is ± 5 ℃):
Cover half is 70 ℃; Dynamic model is 50 ℃.
(3) plasticizing:
The good PPO plastics of step (1) pretreatment are added in the barrel of processing through step (2), be heated to molten condition.
(4) injection:
Nozzle by the PPO plastics of molten condition by the hot flow path through step (2) processing is expelled in the mould after heating, and the injection moulding in this step is divided into 6 stages:
First stage injection pressure is 115kg/cm 2;
Second stage injection pressure is 120kg/cm 2;
Phase III injection pressure is 115kg/cm 2;
Fourth stage injection pressure is 108kg/cm 2;
Five-stage injection pressure is 100kg/cm 2, and the time in this stage be 10s;
The 6th stage injection pressure is 40kg/cm 2.
(5) pressurize:
By even injection, carry out pressurize, and this pressurize operation is divided into three phases:
The pressure of first stage pressurize is 67kg/cm 2, the dwell time is 2s;
The pressure of second stage pressurize is 77kg/cm 2, the dwell time is 3s;
The pressure of phase III pressurize is 86kg/cm 2-105kg/cm 2, the dwell time is 5-8s.
(6) cooling forming:
The time of cooling forming is 38s.
(7) demoulding:
The stripping means of this step is demoulding while hot.
By such scheme, form injection moulding operation, its whole molding cycle is 102s.So effective shortening product molding cycle and saving plastic raw materials.
After above-mentioned injection moulding, can check and packaging process goods:
(1) visual examination, checks the outward appearance of product, and the requirement of product is indispensable material, cracked; Can not have that material is spent, reprinted books in a reduce format, scratch, impression of the hand, stain, the bad phenomenon such as vaporific;
(2) diaphragm pastes and pays: the diaphragm of use is paid as protector the glassy surface of housing, and the remaining standard of diaphragm is 1cm left and right, and it is accurately smooth to paste benchmark.
The air-conditioner housing goods that form by technique provided by the invention have good surface quality and mechanical property; The aesthetics of product surface height very, can reach required quality of item requirement simultaneously.
More than show and described basic principle of the present invention, 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 in above-described embodiment and description, describes 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 (2)

1. a PPO plastics air-conditioner housing Shooting Technique, this technique is implemented based on corresponding adapted to injection system and injection mold, it comprises the steps: pretreatment of raw material, adapted to injection system and injection mold pretreatment, plasticizing, injection, pressurize, cooling forming and the demoulding, it is characterized in that, described technique comprises the steps:
(1) pretreatment of raw material: utilize baking oven to carry out 3 hours dry to PPO plastics, and by PPO plastic heating to 75 ℃-95 ℃;
(2) adapted to injection system and injection mold pretreatment: the barrel in adapted to injection system is heated to 200 ℃-260 ℃, and the hot flow path in adapted to injection system is heated to 230 ℃-260 ℃; Cover half in injection mold is heated to 65 ℃-75 ℃, and dynamic model is heated to 45 ℃-55 ℃;
(3) plasticizing: the good PPO plastics of step (1) pretreatment are added in the barrel of processing through step (2), be heated to molten condition;
(4) injection: the nozzle by the PPO plastics of molten condition by the hot flow path through step (2) processing is expelled in the mould after heating, and injection pressure is 100kg/cm 2-120kg/cm 2;
(5) pressurize: carry out pressurize by even injection;
(6) cooling forming: the time of cooling forming is 38s;
(7) demoulding: demoulding while hot.
2. a kind of PPO plastics air-conditioner housing Shooting Technique according to claim 1, is characterized in that, carries out pressurize and is divided into three phases: the pressure of first stage pressurize is 67kg/cm in described step (5) 2, the dwell time is 2s; The pressure of second stage pressurize is 77kg/cm 2, the dwell time is 3s; The pressure of phase III pressurize is 86kg/cm 2-105kg/cm 2, the dwell time is 5-8s.
CN201010291244.1A 2010-09-25 2010-09-25 Injection molding process for polyphenylene oxide (PPO) plastic air conditioner shell CN102407587B (en)

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CN102173027B (en) * 2011-01-08 2013-06-05 王�忠 Injection molding device and process for injection molding of highlight injection molded part with metallic taste by utilizing same
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
CN104669573A (en) * 2013-11-28 2015-06-03 上海杰事杰新材料(集团)股份有限公司 Injection molding method of plastic food steamer
CN104494082A (en) * 2014-12-12 2015-04-08 上海亚虹模具股份有限公司 Injection molding process of PP plastic smart toilet seat base plate
CN105563781A (en) * 2015-12-30 2016-05-11 苏州乔布注塑工业有限公司 Injection molding process for plastic composite material
CN106079234A (en) * 2016-06-24 2016-11-09 芜湖恒信汽车内饰制造有限公司 A kind of PA GF30 material is coated with the front-end module Shooting Technique of panel beating
CN106113379A (en) * 2016-06-24 2016-11-16 芜湖恒信汽车内饰制造有限公司 A kind of Shooting Technique of PA GF30 material radiator bearer
CN106113429A (en) * 2016-06-27 2016-11-16 芜湖恒信汽车内饰制造有限公司 A kind of Shooting Technique of PP LGF30 material battery carrier
CN109130062A (en) * 2018-07-27 2019-01-04 上海浦东美灵塑料制品有限公司 A kind of improved washing machine cover board injection molding process
CN109109259A (en) * 2018-07-27 2019-01-01 上海浦东美灵塑料制品有限公司 A kind of modified air-conditioner housing injection molding process

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CN1680083A (en) * 2004-04-08 2005-10-12 李春华 Low-pressure injecting formation of internal decorative board of door
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