CN105666775A - Chemical microcellular foaming injection molding method - Google Patents
Chemical microcellular foaming injection molding method Download PDFInfo
- Publication number
- CN105666775A CN105666775A CN201610035763.9A CN201610035763A CN105666775A CN 105666775 A CN105666775 A CN 105666775A CN 201610035763 A CN201610035763 A CN 201610035763A CN 105666775 A CN105666775 A CN 105666775A
- Authority
- CN
- China
- Prior art keywords
- foaming
- die cavity
- melt
- chemical
- mold cavity
- Prior art date
- 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
-
- 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
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
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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
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/34—Auxiliary operations
- B29C44/36—Feeding the material to be shaped
- B29C44/38—Feeding the material to be shaped into a closed space, i.e. to make articles of definite length
- B29C44/42—Feeding the material to be shaped into a closed space, i.e. to make articles of definite length using pressure difference, e.g. by injection or by vacuum
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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
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/34—Auxiliary operations
- B29C44/60—Measuring, controlling or regulating
Landscapes
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
The invention provides a chemical microcellular foaming injection molding method and belongs to the field of plastic chemical foaming. The method includes the steps of heating, fusing and plasticizing foaming raw materials containing a foaming agent and the step of injecting plasticized melted materials into a mold cavity. In the step of injecting the plasticized melted materials into the mold cavity, after the mold cavity is filled with the melted materials, a switch nozzle is switched off, when the temperature of melt in the mold cavity reaches the set value, the pressure in the mold cavity drops instantly, the melted materials start to be foamed, finally cooling and molding are conducted, and finished foamed products are obtained. The chemical microcellular foaming injection molding method aims at solving the problem that by means of an existing chemical foaming injection molding process, foaming is uneven due to a short-shot manner, so that the foaming effect and the quality of manufactured products are poor.
Description
Technical field
The present invention relates to a kind of foamed system and foaming method, belong to plastic chemistry foaming field.
Background technology
Expanded plastic is compared with unfoamed material, and density can reduce by 5%～95%, thus reduces raw materials consumption and cost, has the advantages such as sound isolating and heat insulating performance is good, absorption shock load, shock-absorbing capacity are good, cheap simultaneously. This wherein microcellular plastics there is finer and close and uniform foam structure compared with common foam material, cell density is higher, the over-all properties of resulting product is more excellent, surface quality is better, contraction and the warpage of goods are lower, can being processed into thin-walled goods, therefore microcellular foam material is one of focus of recent foam materials research field. The technique of current microporous foam mainly concentrates on batch still Hair Fixer bubble, moulded from foam, physical blowing Shooting Technique and chemistry injection foaming. Although batch still platen press and compression molding controling parameters are few, than being easier to control abscess-size, being easy to analyze the course of processing to the impact of Structure and Properties, but its preparation cycle is long, efficiency is low, is only applicable to theoretical investigation. The equipment of physical blowing Shooting Technique is complicated, and investment is relatively big, manufacturing cost height, and operating procedure is complicated, and the surface quality of resulting product is poor, and associated core technology is covered by foreign patent simultaneously. Not only shaping cycle is short for chemical foaming Shooting Technique, production efficiency height, can once shaped complex contour and the accurately high microporous foam goods of size, and equipment is simple, operates simple and easy, can directly adopt conventional injection moulding machine to produce. In chemical foaming Shooting Technique field, there is development space widely simultaneously, obtain the core technology with intellecture property significant for the blockade breaking foreign technology. At present, industrialization foam material Shooting Technique is all adopt the mode shorted, namely do not fill when melt is injected into die cavity, expansion during foaming is relied on automatically to fill up die cavity, but this kind of foaming method foaming is uneven, effect is not ideal enough, therefore develops a kind of new chemical foaming injection moulding process and just seems important.
Summary of the invention
It is an object of the invention to: a kind of chemistry injection moulding fretting map method is provided, foams uneven to solve the mode of shorting in existing industrialization frothing injection technique, foaming effect and the poor problem of parts quality.
The present invention intends adopting a kind of like this chemistry injection moulding fretting map method, comprise the step of the foaming raw material heating and melting plasticizing containing whipping agent and the step that plasticizing melt is injected into die cavity, plasticizing melt is injected in the step of die cavity melt and fills die cavity, after filling, close switch nozzle and stop injection, when melt temperature reaches set(ting)value in die cavity, moment step-down in die cavity, melt starts foaming, last cooling forming, obtained foaming finished product.
In die cavity, the method for moment step-down increases mold cavity volume instantaneously.
Described die cavity is enclosed by mould and the sports type core that is arranged in mould and closes, and when needing step-down in die cavity, controls movement type core moment is outer moves.
Compared with prior art, major advantage adopts the mode of full note can ensure even foaming, and the surface quality of obtained foaming product is obviously better than existing chemical foaming technology product, foam structure even compact more in the present invention.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly, below the present invention is described in further detail,
Embodiment:
The present embodiment provides a kind of chemistry injection moulding fretting map method, first, is plastified by the foaming raw material heating and melting containing whipping agent; Then, plasticizing melt is injected in die cavity, and ensures that melt fills die cavity; Afterwards, close switch nozzle, when in die cavity, melt temperature reaches set(ting)value, moment step-down in die cavity, described die cavity is enclosed by mould and the sports type core that is arranged in mould and closes, and step-down process herein only needs controls movement type core moment outer to move, and melt starts to foam, last cooling forming, obtained foaming finished product.
Claims (3)
1. a chemical injection moulding fretting map method, comprise the step of the foaming raw material heating and melting plasticizing containing whipping agent and the step that plasticizing melt is injected into die cavity, it is characterized in that: plasticizing melt is injected in the step of die cavity melt and fills die cavity, injection is stopped after filling, when melt temperature reaches set(ting)value in die cavity, making moment step-down in die cavity, melt starts foaming, last cooling forming, obtained foaming finished product.
2. a kind of chemistry injection moulding fretting map method according to claim 1, it is characterised in that: in die cavity, the method for moment step-down increases mold cavity volume instantaneously.
3. a kind of chemistry injection moulding fretting map method according to claim 2, it is characterised in that: described die cavity is enclosed by mould and the sports type core that is arranged in mould and closes, and when needing step-down in die cavity, controls movement type core moment moves outward.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610035763.9A CN105666775A (en) | 2016-01-20 | 2016-01-20 | Chemical microcellular foaming injection molding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610035763.9A CN105666775A (en) | 2016-01-20 | 2016-01-20 | Chemical microcellular foaming injection molding method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105666775A true CN105666775A (en) | 2016-06-15 |
Family
ID=56301641
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610035763.9A Pending CN105666775A (en) | 2016-01-20 | 2016-01-20 | Chemical microcellular foaming injection molding method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105666775A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106584750A (en) * | 2016-12-13 | 2017-04-26 | 贵州省材料产业技术研究院 | Control method of injection foaming |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1334283A (en) * | 2000-06-22 | 2002-02-06 | 三井化学株式会社 | Injection foaming method and apparatus and composition |
| CN101781406A (en) * | 2009-09-25 | 2010-07-21 | 北京中拓机械有限责任公司 | Thermoplastic elastomer skin product and production method thereof |
| CN102218792A (en) * | 2011-01-10 | 2011-10-19 | 国家复合改性聚合物材料工程技术研究中心 | Controllable preparation method and device for microporouspolymer materials |
| CN103201344A (en) * | 2010-11-01 | 2013-07-10 | 东洋纺株式会社 | Polyamide resin composition, expanded polyamide resin molding, and automotive resin molding |
| CN103608158A (en) * | 2011-01-27 | 2014-02-26 | 新平衡运动鞋公司 | Injection molding systems and methods for forming materials used in footwear and materials manufactured by said systems and methods |
| CN203622973U (en) * | 2013-12-30 | 2014-06-04 | 贵州省材料产业技术研究院 | Micro-foaming device with temperature-controllable injection molding cavity |
| CN203650999U (en) * | 2013-12-30 | 2014-06-18 | 贵州省材料产业技术研究院 | Micro-foaming device controlled by piston |
-
2016
- 2016-01-20 CN CN201610035763.9A patent/CN105666775A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1334283A (en) * | 2000-06-22 | 2002-02-06 | 三井化学株式会社 | Injection foaming method and apparatus and composition |
| CN101781406A (en) * | 2009-09-25 | 2010-07-21 | 北京中拓机械有限责任公司 | Thermoplastic elastomer skin product and production method thereof |
| CN103201344A (en) * | 2010-11-01 | 2013-07-10 | 东洋纺株式会社 | Polyamide resin composition, expanded polyamide resin molding, and automotive resin molding |
| CN102218792A (en) * | 2011-01-10 | 2011-10-19 | 国家复合改性聚合物材料工程技术研究中心 | Controllable preparation method and device for microporouspolymer materials |
| CN103608158A (en) * | 2011-01-27 | 2014-02-26 | 新平衡运动鞋公司 | Injection molding systems and methods for forming materials used in footwear and materials manufactured by said systems and methods |
| CN203622973U (en) * | 2013-12-30 | 2014-06-04 | 贵州省材料产业技术研究院 | Micro-foaming device with temperature-controllable injection molding cavity |
| CN203650999U (en) * | 2013-12-30 | 2014-06-18 | 贵州省材料产业技术研究院 | Micro-foaming device controlled by piston |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106584750A (en) * | 2016-12-13 | 2017-04-26 | 贵州省材料产业技术研究院 | Control method of injection foaming |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160615 |
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| RJ01 | Rejection of invention patent application after publication |