CN1449905A - Method and equipment for making hot-filling polyester bottle - Google Patents

Method and equipment for making hot-filling polyester bottle Download PDF

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Publication number
CN1449905A
CN1449905A CN02108944A CN02108944A CN1449905A CN 1449905 A CN1449905 A CN 1449905A CN 02108944 A CN02108944 A CN 02108944A CN 02108944 A CN02108944 A CN 02108944A CN 1449905 A CN1449905 A CN 1449905A
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bottle
hot
filling
polyester bottle
polyester
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CN02108944A
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CN100408309C (en
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林子祥
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/10Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working

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  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)

Abstract

The present invention relates to a production method of thermal filling polyester bottle and its equipment. It uses PET polyester as raw material, and includes the following procedures: injection moulding bottle blank by using injection moulding machine, heating bottle blank; placing heated bottle blank into thermal die of stretch-blowing machine to make stretch-blow moulding. The stretch-blow moulding procedure is divided into three steps which are implemented in same pair of dies: first step. retaining closed die after stretch-blow moulding; second step. discharging air and reducing pressure under the condition of heat-insulating; and third step, secondary blowing to retain pressure, at the same time exhausting air, and opening die after the polyester bottle is formed.

Description

Hot-filling polyester bottle processing method and equipment
Technical field
The present invention relates to the process technology of plastic packaging containers, particularly relate to the processing method of heat filling beverage packaging plastic bottle, and the equipment of this processing method.
Background technology
With plastics such as polyester is that raw material is produced various packing containers, for example beverage bottle, oil bottle, bottle for cosmetics etc. generally adopt the processing technology of annotating stretch blow, are about to the plastic raw materials notes and make bottle base, bottle base is heated, then the bottle base after the heating is put into the blow molding of stretch blow machine mould drawn again.Because normally used packaged material (beverage, mineral water, wet goods) is the cold filling material, so stretch blow machine mould is cold mould.If but packaged object is a heatable substance, for example hot tea, if pour in the plastic containers of cold Mould Machining, plastic containers (bottle) can shrink immediately.Therefore, people are in order to adapt to the needs of hot filling material, add at plastic containers and adopt the mold heat stretch blow man-hour.The method that prior art adopts mold heat processing plastic container to be fit to hot filling has two kinds, a kind of is that the stretch blow mould is adopted electrical heating or steam heated or oil heating, the container physical property is changed, but there is poor stability in the plastic containers that production is blown in this step hot-drawn, the container of making can not be put for a long time, usually used in 2-4 days, carrying out hot filling after having crossed during this period of time can shrink again, and qualification rate is very low.Another kind method is full-automatic three die shift formula blowing methods, promptly arrange in a machine three secondary heating moulds are installed, the shape of three secondary moulds is inequality, and stretch blow becomes approximate circle barrel-shaped to the first secondary mould to bottle base, the second secondary mould blows out the main body outline, and the 3rd secondary mould is moulding fully.After three blowings of this three secondary mould product is progressively finalized the design, the improvement situation of molecular structure is stablized, container after the blowing carries out hot filling again after the storage long period and still can not shrink, indeformable, but it is big that its shortcoming is an equipment volume, expense investment is expensive, and material is had strict demand again, general in, small enterprise is difficult accepts.
Summary of the invention
The present invention provides a kind of reduced investment in order to overcome the defective of prior art, and is simple to operate, the hot-filling polyester bottle processing method and the equipment of stable performance.The technical scheme of this processing method is: getting the PET polyester is raw material, make bottle base by the injection machine notes, bottle base heats, it is stretch blow-molded that heating back bottle base is put into stretch blow machine mold heat, it is characterized in that bottle base is stretch blow-molded in mold heat was divided into for three steps, three steps carried out in same secondary mould, and the first step is to keep matched moulds behind the stretch-blow; Second step was an insulation exhaust decompression down; The 3rd step was to blow once more, and exhaust in the air blowing pressurize, i.e. limit air blowing limit exhaust.Wherein second the step heat-preservation exhaust time less than 30 seconds, 100 ℃-200 ℃ of holding temperatures.The 1-2.5MPa that keep-ups pressure during air blowing limit, the limit exhaust in the 3rd step, and the time is less than 30 seconds.This process equipment is to utilize existing stretch blow machine, but is shaped on steam vent in the stretching bar of stretch blow machine, the heat-preservation exhaust in second step and the limit air blowing limit exhaust in the 3rd step, and gas is discharged from the steam vent of stretching bar in its bottle.Another feature of equipment is installed the bottleneck clamp above mold heat, there is the compression spring in the clamp outside, and compression spring other end connects template.And oblique line contact-making surface preferably between die orifice clamp and the mold heat.Adopt the clamp purpose on the mold heat, clamped of the polyester bottles bottleneck of moulding when making die sinking is exactly put and is held, do not continue to be attached in the either side mould, ensure the quality of products, because mould is hot, if one side of the polyester bottles after the moulding continues to be attached in the mould be heated, and opposite side is exposed at and cools off in the air, the performance of bottle just changes, and has become scrap at once.This method processing hot-filling polyester bottle utilizes existing various stretch blow machines, and only the stretching bar is made improvements, and add clamping device at the mould mouth, still be a secondary mould, low equipment investment; In same secondary mould, carry out three actions, as long as limited controlling organization, operate very simple, whole automated procedures; With less investment, the simple improvement obtains the qualified polyester bottles that is used for hot filling fully, obtains beyond thought effect.
Description of drawings
Fig. 1 is a hot-filling polyester bottle process equipment stretch blow machine schematic diagram of the present invention;
Fig. 2 is that the mould mouth of hot-filling polyester bottle process equipment stretch blow machine mold heat of the present invention has the clamp schematic diagram.
1, support; 2, locked mode plate; 3, polyester bottleneck; 4, air blowing cylinder; 5, draft cylinder; 6, stretching bar; 7, steam vent; 8, stretch blow machine; 9, spring; 10, clamp; 11, mold heat; 12, polyester bottles; 13, oblique line contact-making surface between clamp and the mold heat.
The specific embodiment
The present invention relates to the processing method and the equipment of hot-filling polyester bottle, in the processing method with the prior art same section be: getting the PET polyester is raw material, make bottle base by the injection machine notes, bottle base heats, and it is stretch blow-molded that heating back bottle base is put into stretch blow machine mold heat.The main improvement is that bottle base stretch blow-molded operation in mold heat is divided into three steps, and three steps were to carry out in same secondary mould, the incipient stage of the first step is the same with prior art, it is stretch-blow, and the after-stage difference, originally be behind the stretch-blow with regard to die sinking, keep matched moulds behind the stretch-blow now; Then second step was to keep exhaust decompression under the temperature, gas in the bottle is discharged and shrinks, and holding temperature 100-200 ℃, evacuation time is less than 30 seconds; The 3rd step blew again to the bottle that shrinks, and exhaust in the air blowing pressurize, while the exhaust of promptly blowing keep-ups pressure at 1-2.5MPa, the time is less than 30 seconds, through die sinking after the certain moulding of this operation polyester bottles.But the molding of polyester bottle is contacted with mould separating at once, be not attached in the either side mould.Because after the die sinking, the molding of polyester bottle is often mostly to be to be attached on the mould of a certain side wherein, and this is a fatal key problem for mold heat, can cause that a side continues heating, opposite side cooling and scrapping.Process equipment during stretch blow makes improvements design to the stretching bar 6 of stretch blow machine, is shaped on steam vent 7 at the center, and exhaust is discharged by this hole in the polyester bottles 12.On the other hand bottleneck 3 clamps 10 are installed in the top of mold heat 11, in the clamp outside compression spring 9 is arranged, compression spring other end connects on the locked mode plate 2, after a die sinking, spring 9 is released clamp 10 rapidly, clamp 10 is put polyester bottles bottleneck 3, makes polyester bottles 12 bodies break away from the either side mould.And oblique line contact-making surface 13 preferably between die orifice clamp 10 and the mold heat 11, break away from mold heat 11 around so not only making polyester bottles 12, but the mold heat 11 of oblique line contact-making surface moves past Cheng Zhonghui outside clamp 10 is up pushed away, make 12 ends of polyester bottles also break away from mold heat 11 like this.In actual product, the technical scheme that makes polyester bottles can break away from mold heat is a lot, and protection domain is not limited by accompanying drawing and present embodiment.

Claims (8)

1, hot-filling polyester bottle processing method, getting the PET polyester is raw material, make bottle base by the injection machine notes, bottle base heats, it is stretch blow-molded that heating back bottle base is put into stretch blow machine mold heat, it is characterized in that bottle base is stretch blow-molded in mold heat was divided into for three steps, and three steps carried out in same secondary mould, and the first step is to keep matched moulds behind the stretch-blow; Second step was the heat-preservation exhaust decompression; The 3rd step was to blow once more, and exhaust in the air blowing pressurize, i.e. limit air blowing limit exhaust, die sinking after the polyester bottles moulding.
2, hot-filling polyester bottle processing method as claimed in claim 1 is characterized in that for second time that goes on foot heat-preservation exhaust less than 30 seconds, 100 ℃-200 ℃ of holding temperatures.
3, hot-filling polyester bottle processing method as claimed in claim 1,1-2.5MPa keep-ups pressure when it is characterized in that the 3rd step air blowing limit, limit exhaust.
4, as claim 1 or 3 described hot-filling polyester bottle processing methods, the time that it is characterized in that the 3rd step limit air blowing limit exhaust is less than 30 seconds.
5, the processing method of hot-filling polyester bottle as claimed in claim 1 is characterized in that the molding of polyester bottle of die sinking is not attached in the either side mould.
6, the process equipment of hot-filling polyester bottle as claimed in claim 1 is characterized in that being shaped on steam vent (7) in the stretching bar (6) of stretch blow machine.
7, the process equipment of hot-filling polyester bottle as claimed in claim 1 is characterized in that bottleneck (3) clamp (10) is installed in the top of mold heat (11), and there is compression spring (9) in the clamp outside, and compression spring other end connects locked mode plate (2).
8, the process equipment of hot-filling polyester bottle as claimed in claim 7 is characterized in that between bottleneck clamp (10) and the mold heat (11) it being oblique line contact-making surface (13).
CNB021089442A 2002-04-10 2002-04-10 Method and equipment for making hot-filling polyester bottle Expired - Fee Related CN100408309C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNB021089442A CN100408309C (en) 2002-04-10 2002-04-10 Method and equipment for making hot-filling polyester bottle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNB021089442A CN100408309C (en) 2002-04-10 2002-04-10 Method and equipment for making hot-filling polyester bottle

Publications (2)

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CN1449905A true CN1449905A (en) 2003-10-22
CN100408309C CN100408309C (en) 2008-08-06

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102258260A (en) * 2011-04-27 2011-11-30 深圳市骏泰美亚科技有限公司 Extrusion water-spray cold insulation sport bottle and preparation method thereof
CN105665540A (en) * 2016-03-29 2016-06-15 苏州市合叶精密机械有限公司 Die locking base for stamping die
CN106142580A (en) * 2015-04-09 2016-11-23 湖南奥润塑料制品有限公司 A kind of heat fills the production technology of carafe
CN110293665A (en) * 2019-06-25 2019-10-01 宁波均胜群英汽车系统股份有限公司 A kind of blow molding method of TEEE bellows
CN111605163A (en) * 2019-02-22 2020-09-01 张再顺 Rotating disk type container forming system, container forming method and product thereof

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2191093C (en) * 1995-03-27 2000-08-22 Kurt H. Ruppman, Sr. Method of making a molded plastic container

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102258260A (en) * 2011-04-27 2011-11-30 深圳市骏泰美亚科技有限公司 Extrusion water-spray cold insulation sport bottle and preparation method thereof
CN106142580A (en) * 2015-04-09 2016-11-23 湖南奥润塑料制品有限公司 A kind of heat fills the production technology of carafe
CN105665540A (en) * 2016-03-29 2016-06-15 苏州市合叶精密机械有限公司 Die locking base for stamping die
CN111605163A (en) * 2019-02-22 2020-09-01 张再顺 Rotating disk type container forming system, container forming method and product thereof
CN110293665A (en) * 2019-06-25 2019-10-01 宁波均胜群英汽车系统股份有限公司 A kind of blow molding method of TEEE bellows

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Assignee: Beijing Huarong Plastic & Rubber Co., Ltd.

Assignor: Lin Zixiang

Contract record no.: 2009110000228

Denomination of invention: Method and equipment for making hot-filling polyester bottle

Granted publication date: 20080806

License type: Exclusive License

Open date: 20050601

Record date: 20091014

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Assignee: Beijing Huarong Plastic & Rubber Co., Ltd.

Assignor: Lin Zixiang

Contract record no.: 2009110000228

Date of cancellation: 20141119

LICC Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model
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