CN101254642A - Dual-color one-shot forming injection mold and injection molding method thereof - Google Patents

Dual-color one-shot forming injection mold and injection molding method thereof Download PDF

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Publication number
CN101254642A
CN101254642A CNA2008100809966A CN200810080996A CN101254642A CN 101254642 A CN101254642 A CN 101254642A CN A2008100809966 A CNA2008100809966 A CN A2008100809966A CN 200810080996 A CN200810080996 A CN 200810080996A CN 101254642 A CN101254642 A CN 101254642A
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China
Prior art keywords
injection
separator
mold
die cavity
plastic
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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.)
Pending
Application number
CNA2008100809966A
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Chinese (zh)
Inventor
王卫兵
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Taizhou Vocational and Technical College
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Taizhou Vocational and Technical College
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Publication date
Application filed by Taizhou Vocational and Technical College filed Critical Taizhou Vocational and Technical College
Priority to CNA2008100809966A priority Critical patent/CN101254642A/en
Publication of CN101254642A publication Critical patent/CN101254642A/en
Pending legal-status Critical Current

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Abstract

The invention discloses an injection molding mold for double-color one-step molding injection mold and an injection molding method by using the mold. The double-color one-step molding injection mold comprises a mold cavity consisting of a cavity (1) and a core (2), and a movable separator (4) for dividing the mold cavity into two sections. The injection molding method by using the injection mold comprises the following steps: closing the mold, and dividing the mold cavity by the separator; injecting a first material; injecting a second material; closing the injection hole (1); retreating the separator; and closing the injection hole (2), cooling, keeping the pressure, and de-molding to eject a plastic part. Alternatively, the second material is injected after cooling the first material, keeping the temperature and retreating the separator. The injection mold and the molding method are used for injection molding of double-color plastic parts, with the advantages simple production process and stable product quality. The mold has the advantages of simple structure, easy manufacture and low cost.

Description

Dual-color one-shot forming injection mold and injection molding forming method
Affiliated technical field
The injection molding forming method that the present invention relates to a kind of plastic injection mould and use this mould especially refers to be used for the injection mold and the injection molding forming method of dual-color one-shot forming.
Background technology
Current many products all adopt the plastics of two kinds of different colours or unlike material, combine with opaque material as transparent material, red white double-colored product.For the plastic of this many materials or polychrome, when moulding, adopt following two kinds of methods usually.
1. use post forming method: two kinds of plastic material moulding at twice; Product carries out a kind of material of the injection mo(u)lding first time from a mold, and depanning is put into an other mold again and carried out the injection mo(u)lding second time after taking out.This moulding technology need be finished by 2 molds, but does not need special double coloured plastic injection machine.Make double-colored adhesion strength of moulding in this way poor, element precision is low, and the surface is comparatively coarse.The cycle of a product of its moulding simultaneously is longer, and management difficulty is higher.
2. use the rotary die one-shot forming: the injection moulding on a special injection machine of multiple plastic material, divide moulding several times, need to use a cover rotary die.Rotary die comprises many group die cavities and core, and the shape of each die cavity is different, a kind of material product of difference moulding, and the shape of core is just the same.Behind first kind of material of injection, the forward and backward mould of mould is rotated with the center, carries out the injection of second kind of material again.Make and to make the outward appearance of product beautiful in this way.But mould involves great expense, the specification requirement height, and be restricted the service life of mould.
Summary of the invention
The object of the present invention is to provide a kind of dual-color one-shot forming injection mold and injection molding forming method, it can realize using a secondary mould to finish the injection moulding of multiple plastics, and mould structure is simple, is easy to make and use.
The technical solution adopted for the present invention to solve the technical problems is: the dual-color one-shot forming injection mold constitutes die cavity by mold cavity and core, uses a mobilizable separator that die cavity is separated into two parts, and the core of separation partly uses and inserts.This separator cuts off die cavity when matched moulds, withdraws from the injection that a segment distance carries out second kind of material again behind a kind of material of injection.
In the mould of a multi-cavity mold, can place separator by a die cavity therein, place separator respectively in perhaps a plurality of die cavitys.
Separator can be placed on the dynamic model side, and uses hydraulic cylinder to control.
Need use a double coloured plastic injection machine when using the double-colored plastic of dual-color one-shot forming injection mould processing, this injection machine has two barrels, and two nozzles are arranged.The step of double-colored single injection-molded is as follows:
Step 1: closing molding, and separator is pushed to the operating position separates die cavity.
Step 2: inject first kind of plastic material to the die cavity of separating with first nozzle.
Step 3: inject second kind of plastic material to die cavity with second nozzle.
Step 4: close first nozzle.
Step 5: separator is stepped back a wall thickness distance.
Step 6: close second nozzle.
Step 7: carry out the pressurize cooling.
Step 8: die sinking, and eject plastic.
Also can adopt following steps:
Step 1: closing molding, and separator is pushed to the operating position separates die cavity.
Step 2: inject first kind of plastic material with first nozzle to the die cavity of separating, and cool off pressurize.
Step 3: separator is stepped back a wall thickness distance.
Step 4: inject second kind of plastic material with second nozzle to die cavity, and cool off pressurize.
Step 5: die sinking, and eject plastic.
The present invention compared with prior art has following beneficial effect:
Use the present invention to carry out two materials or double-colored plastic part production, when injection mo(u)lding, because the restriction of separator, will be in the zone that limits when injecting for the first time.Carry out the injection second time after separator withdrawed from, the material of injection will be directly bonded on the material that has been shaped of injection for the first time for the second time, thereby make two kinds of materials in conjunction with as a whole.Since when injecting for the second time, not cooling fully of the material of injection for the first time, thereby can obtain very high bond strength.
Use the present invention to carry out double-colored plastic part production, only need a secondary mould, and can one-shot forming, improved working (machining) efficiency, and can ensure the quality of products and good product appearance.
Mould structure of the present invention is simple, and is approaching with ordinary injection die, and need not to be rotated in forming process, thereby the manufacturing of mould is relative simple and easy with maintenance, and cost significantly descends.
Description of drawings
Fig. 1 is the schematic diagrames of one embodiment of the present of invention before first kind of material of injection.
Fig. 2 is the schematic diagrames of one embodiment of the present of invention behind first kind of material of injection.
Fig. 3 is the schematic diagrames of one embodiment of the present of invention before second kind of material of injection.
Fig. 4 is the schematic diagrames of one embodiment of the present of invention behind second kind of material of injection.
The specific embodiment
The present invention is further described below in conjunction with drawings and Examples.
As Fig. 1~embodiment illustrated in fig. 4, the dual-color one-shot forming injection mold constitutes die cavity by mold cavity (1) and core (2), uses a mobilizable separator (4) that die cavity is separated into two parts, and the core in the separator is partly made insert (3).Separator (4) is positioned at the dynamic model side, and is controlled by hydraulic cylinder (5).
When using this mould to carry out injection mo(u)lding, carry out according to the following steps:
Step 1: closing molding, and separator (4) is pushed to the operating position of fitting with die cavity (1) separates die cavity.
Step 2: inject first kind plastic material (61) through cast gate (11) to the die cavity of separating with first nozzle, and cool off pressurize.
Step 3: separator (4) is stepped back a wall thickness distance.
Step 4: inject second kind plastic material (62) through cast gate (12) to die cavity with second nozzle, and cool off pressurize.
Step 5: die sinking, and eject plastic.
By above-mentioned steps, the material of injection fuses with the material of injecting for the first time and is one for the second time, finishes the injection mo(u)lding of dual-color plastic goods.

Claims (5)

1. dual-color one-shot forming injection mold is characterized in that: constitute die cavity by mold cavity (1) and core (2), use a mobilizable separator (4) that die cavity is separated into two parts, the core of separation is partly made insert (3).Separator (4) cuts off die cavity when matched moulds, withdraws from the injection that a segment distance carries out second kind of material again behind a kind of material of injection.
2. dual-color one-shot forming injection mold as claimed in claim 1 is characterized in that: described mold cavity (1) can constitute a plurality of die cavitys with core (2), uses separator in one or more die cavitys therein.
3. many materials one-shot forming injection mold as claimed in claim 1 or 2 is characterized in that: described separator (4) is in the dynamic model side.
4. an injection molding forming method that utilizes dual-color one-shot forming injection mold as claimed in claim 1 is characterized in that, the step of injection mo(u)lding is as follows:
Step 1: closing molding, and separator is pushed to the operating position separates die cavity.
Step 2: inject first kind of plastic material to the die cavity of separating with first nozzle.
Step 3: inject second kind of plastic material to die cavity with second nozzle.
Step 4: close first nozzle.
Step 5: separator is stepped back a wall thickness distance.
Step 6: close second nozzle.
Step 7: carry out the pressurize cooling.
Step 8: die sinking, and eject plastic.
5. an injection molding forming method that utilizes dual-color one-shot forming injection mold as claimed in claim 1 is characterized in that, the step of injection mo(u)lding is as follows:
Step 1: closing molding, and separator is pushed to the operating position separates die cavity.
Step 2: inject first kind of plastic material with first nozzle to the die cavity of separating, and cool off pressurize.
Step 3: separator is stepped back a wall thickness distance.
Step 4: inject second kind of plastic material with second nozzle to die cavity, and cool off pressurize.
Step 5: die sinking, and eject plastic.
CNA2008100809966A 2008-03-02 2008-03-02 Dual-color one-shot forming injection mold and injection molding method thereof Pending CN101254642A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNA2008100809966A CN101254642A (en) 2008-03-02 2008-03-02 Dual-color one-shot forming injection mold and injection molding method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNA2008100809966A CN101254642A (en) 2008-03-02 2008-03-02 Dual-color one-shot forming injection mold and injection molding method thereof

Publications (1)

Publication Number Publication Date
CN101254642A true CN101254642A (en) 2008-09-03

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CN (1) CN101254642A (en)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101890784A (en) * 2010-06-28 2010-11-24 上海子元汽车零部件有限公司 Molding method of double-density product
CN102233648A (en) * 2010-04-23 2011-11-09 天津联盈电子塑料制品有限公司 One-time injection molding process for double-component material, and mould used by same
CN102294787A (en) * 2011-08-11 2011-12-28 上海小糸车灯有限公司 Groove structure of material sealing rib insert and application thereof
CN103096833A (en) * 2010-07-30 2013-05-08 株式会社普罗凯尔 Electric toothbrush, toothbrush bristle assembly, and method for manufacturing the toothbrush bristle assembly
WO2013117127A1 (en) * 2012-02-08 2013-08-15 珠海天威飞马打印耗材有限公司 Method for manufacturing scraping knife
CN103624214A (en) * 2012-08-25 2014-03-12 天津湶钰冒口有限公司 One-time forming manufacturing technology for internal heat riser
CN104669531A (en) * 2013-12-02 2015-06-03 苏州市吴中区临湖俊峰机械厂 Handlebar inside seat forming plastic mold
CN104669522A (en) * 2013-12-02 2015-06-03 苏州市吴中区临湖俊峰机械厂 Children bicycle pedal forming plastic mold
CN104669532A (en) * 2013-12-02 2015-06-03 苏州市吴中区临湖俊峰机械厂 Plastic mold for molding vehicle handle shell
CN105014864A (en) * 2014-05-02 2015-11-04 东芝机械株式会社 Molding apparatus, method of molding, and molded products
CN105345974A (en) * 2015-12-10 2016-02-24 吴明武 Method for preparing dual-color zone or multiple-color zone soft shell
CN105437439A (en) * 2015-12-10 2016-03-30 吴明武 Method for preparing soft shell
CN105881808A (en) * 2014-09-28 2016-08-24 宁波东昊汽车部件有限公司 Ventilation door double-color mold
CN110696298A (en) * 2019-11-27 2020-01-17 童爱霞 Injection mold
CN111590817A (en) * 2020-06-03 2020-08-28 程链 Injection molding plate forming mold with framework and using method thereof

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102233648A (en) * 2010-04-23 2011-11-09 天津联盈电子塑料制品有限公司 One-time injection molding process for double-component material, and mould used by same
CN101890784B (en) * 2010-06-28 2013-04-24 上海子元汽车零部件有限公司 Molding method of double-density product
CN101890784A (en) * 2010-06-28 2010-11-24 上海子元汽车零部件有限公司 Molding method of double-density product
CN103096833B (en) * 2010-07-30 2015-06-24 株式会社普罗凯尔 Electric toothbrush, toothbrush bristle assembly, and method for manufacturing the toothbrush bristle assembly
CN103096833A (en) * 2010-07-30 2013-05-08 株式会社普罗凯尔 Electric toothbrush, toothbrush bristle assembly, and method for manufacturing the toothbrush bristle assembly
CN102294787A (en) * 2011-08-11 2011-12-28 上海小糸车灯有限公司 Groove structure of material sealing rib insert and application thereof
CN102294787B (en) * 2011-08-11 2013-05-29 上海小糸车灯有限公司 Groove structure of material sealing rib insert and application thereof
WO2013117127A1 (en) * 2012-02-08 2013-08-15 珠海天威飞马打印耗材有限公司 Method for manufacturing scraping knife
CN103624214A (en) * 2012-08-25 2014-03-12 天津湶钰冒口有限公司 One-time forming manufacturing technology for internal heat riser
CN104669531A (en) * 2013-12-02 2015-06-03 苏州市吴中区临湖俊峰机械厂 Handlebar inside seat forming plastic mold
CN104669522A (en) * 2013-12-02 2015-06-03 苏州市吴中区临湖俊峰机械厂 Children bicycle pedal forming plastic mold
CN104669532A (en) * 2013-12-02 2015-06-03 苏州市吴中区临湖俊峰机械厂 Plastic mold for molding vehicle handle shell
CN105014864A (en) * 2014-05-02 2015-11-04 东芝机械株式会社 Molding apparatus, method of molding, and molded products
US9844901B2 (en) 2014-05-02 2017-12-19 Toshiba Kikai Kabushiki Kaisha Molding apparatus, method of molding, and molded products
US10124517B2 (en) 2014-05-02 2018-11-13 Toshiba Kikai Kabushiki Kaisha Molding apparatus, method of molding, and molded products
CN105881808A (en) * 2014-09-28 2016-08-24 宁波东昊汽车部件有限公司 Ventilation door double-color mold
CN105345974A (en) * 2015-12-10 2016-02-24 吴明武 Method for preparing dual-color zone or multiple-color zone soft shell
CN105437439A (en) * 2015-12-10 2016-03-30 吴明武 Method for preparing soft shell
CN110696298A (en) * 2019-11-27 2020-01-17 童爱霞 Injection mold
CN110696298B (en) * 2019-11-27 2021-07-30 宁波市国盛仪表有限公司 Injection mold
CN111590817A (en) * 2020-06-03 2020-08-28 程链 Injection molding plate forming mold with framework and using method thereof

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Open date: 20080903