CN103507204A - Molding method of injection molding element - Google Patents
Molding method of injection molding element Download PDFInfo
- Publication number
- CN103507204A CN103507204A CN201210215048.5A CN201210215048A CN103507204A CN 103507204 A CN103507204 A CN 103507204A CN 201210215048 A CN201210215048 A CN 201210215048A CN 103507204 A CN103507204 A CN 103507204A
- Authority
- CN
- China
- Prior art keywords
- profiling
- overcoat
- thermoplastic elastomer
- tpe
- forming method
- 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.)
- Pending
Links
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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/1418—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles the inserts being deformed or preformed, e.g. by the injection pressure
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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
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
-
- 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
- B29C45/0025—Preventing defects on the moulded article, e.g. weld lines, shrinkage marks
- B29C2045/0037—Moulding articles or parts thereof without parting line
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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
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C2045/1486—Details, accessories and auxiliary operations
- B29C2045/14868—Pretreatment of the insert, e.g. etching, cleaning
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
The invention provides a molding method of an injection molding element. The method comprises the following steps: S1. preparing a thermoplastic elastomer copying outerwear matched with the shape of the injection molding element by using a thermal pressing or injection molding method; and S2. placing the thermoplastic elastomer copying outerwear in a mould; assembling the mould and then performing injection molding; and opening the mould and peeling off the thermoplastic elastomer copying outerwear, thereby obtaining the injection molding element. According to the molding method of the injection molding element provided by the invention, the copying outerwear with the elasticity is adopted in the mould, so that the generation of a mould assembling line is effectively avoided during the injection molding process. Thus, the mould assembling line on the surface of the injection molding element is effectively eliminated. According to the method, the process is simple and the quality of the injection molding element is simple and stable, so that the production efficiency is greatly improved.
Description
Technical field
The invention belongs to injection molding technology field, relate in particular to a kind of forming method of moulding.
Background technology
The production of low-cost injection molding product be unable to do without uses a large amount of moulds, and the product surface that mould production obtains has spue line, and its outward appearance is coarse, and handle effect is poor.Along with people improve the pursuit of product quality, the elimination of the spue line that mould production causes becomes the difficult point of industry.For example, can, by change mould structure, to alleviate the impact of spue line, but still there are some unavoidable spue lines in some product.This these unavoidable spue line, is mainly to be eliminated and covered by techniques such as follow-up manual polishing, sprayings at present, and technique is loaded down with trivial details, production cost increases.Meanwhile, a large amount of artificial of manual polishing demand, labor productivity is low, and different workman polish after product quality different, be difficult to guarantee the quality stability of product.
Summary of the invention
The invention solves the spue line existing in the injection molding product surface removal spue line process existing in prior art and be difficult to thorough removal, technique is loaded down with trivial details, cost is higher and productivity ratio is low technical problem.
The forming method that the invention provides a kind of moulding, comprises the following steps:
S1, employing hot pressing or injection molding forming method, the thermoplastic elastomer (TPE) profiling overcoat that preparation is mated with moulding profile;
S2, described thermoplastic elastomer (TPE) profiling is placed on outward in mould, after matched moulds, carries out injection mo(u)lding, after die sinking, peel off described thermoplastic elastomer (TPE) profiling overcoat, obtain described moulding.
The forming method of moulding provided by the invention, before injection moulding, by hot pressing or injection molding forming method, prepare a thermoplastic elastomer (TPE) profiling overcoat mating with required moulding profile, in follow-up injection moulding process, this profiling is placed in mould outward, because this profiling sleeve surface has elasticity, therefore both effectively demouldings in injection moulding process, avoid again the generation of spue line.Forming method provided by the invention, technique is simple, stable and reliable product quality, production efficiency improves greatly.
The specific embodiment
The forming method that the invention provides a kind of moulding, comprises the following steps:
S1, employing hot pressing or injection molding forming method, the thermoplastic elastomer (TPE) profiling overcoat that preparation is mated with moulding profile;
S2, described thermoplastic elastomer (TPE) profiling is placed on outward in mould, after matched moulds, carries out injection mo(u)lding, after die sinking, peel off described thermoplastic elastomer (TPE) profiling overcoat, obtain described moulding.
The forming method of moulding provided by the invention, before injection moulding, by hot pressing or injection molding forming method, prepare a thermoplastic elastomer (TPE) profiling overcoat mating with required moulding profile, in follow-up injection moulding process, this profiling is placed in mould outward, because this profiling sleeve surface has elasticity, therefore both effectively demouldings in injection moulding process, avoid again the generation of spue line.Forming method provided by the invention, technique is simple, stable and reliable product quality, production efficiency improves greatly.
Particularly, in the present invention, described thermoplastic elastomer (TPE) profiling overcoat prepares by hot pressing or injection molding forming method, and can not prepare by other various forming methods in the prior aries such as liquid filling solidifies.This be due to, profiling overcoat is prepared in hot pressing or injection mo(u)lding, on the one hand technique is simple, consuming time shorter; On the other hand, formed product precision is high, and shape is controlled.And existing by liquid filling curing molding method, one side is poor hardening time, and on the other hand, in liquid curing process, shape is difficult to control.
Under preferable case, in the present invention, described thermoplastic elastomer (TPE) profiling overcoat is silicon rubber profiling overcoat, and the performance of silicon rubber, when meeting consistency and elasticity, also has excellent temperature tolerance.More preferably in situation, select temperature resistant range at the silicon rubber of 250-320 ℃, its thermal shock resistance properties that stands conventional injection-moulded plastic is better.
The mold temperature when hot pressing of profiling overcoat or injection mo(u)lding is directly related with its concrete material.In the present invention, described profiling overcoat is thermoplastic elastomer (TPE), so corresponding mold temperature is 40-200 ℃ when hot pressing or this thermoplastic elastomer (TPE) of injection mo(u)lding.And when described thermoplastic elastomer (TPE) profiling overcoat is selected silicon rubber profiling overcoat, when hot pressing or injection mo(u)lding, corresponding mold temperature is 90-130 ℃.
In the present invention, described profiling overcoat is positioned in mould, for eliminate the spue line on moulding surface after injection mo(u)lding.Indeformable for guaranteeing that this profiling is enclosed within injection mold outward, the profiling overcoat adopting in the present invention need have certain wall thickness.Under preferable case, the shore hardness of described thermoplastic elastomer (TPE) is not less than 60A, and the minimum thickness of profiling overcoat is not less than 0.5mm.
In the present invention, for the moulding surface of guaranteeing to obtain after injection mo(u)lding does not have spue line, under preferable case, also comprise first profiling overcoat is carried out putting it into the step in mould after surface treatment again.Particularly, described surperficial step only need be for the inner surface (surface contacting with Injection Molding Products) of profiling overcoat.Described surface-treated step can comprise the removing processing of the surface of profiling overcoat being carried out to burr and burr, but is not limited to this.
As a kind of preferred embodiment of the present invention, in the present invention, after described thermoplastic elastomer (TPE) profiling is placed in mould outward, before matched moulds, also comprises toward described thermoplastic elastic profiling overcoat inner surface and cover the step that releasing agent forms separate layer.Form after this separate layer, in the later stage, profiling overcoat can be peeled off easily from moulding surface, and the surface of moulding not produced to any impact.The various solvent-borne types that described releasing agent is commonly used for those skilled in the art, powder-type or paste type releasing agent, the present invention is not particularly limited.
In order to make technical problem solved by the invention, technical scheme and beneficial effect clearer, below in conjunction with embodiment, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
Embodiment mono-
Mold temperature be at 100-110 ℃ by silicon rubber hot pressing moulding, obtain the silicon rubber profiling overcoat that mates with moulding profile, its thickness is 0.70mm; Then remove burr and the burr of this silicon rubber profiling overcoat inner surface, and spray one deck powder-type releasing agent at the inner surface of this silicon rubber profiling overcoat, at this silicon rubber profiling overcoat inner surface, form one deck separate layer.The silicon rubber profiling this inner surface to separate layer is placed on outward in injection mold, carries out injection mo(u)lding after matched moulds, and this silicon rubber profiling overcoat is peeled off in die sinking after injection moulding completes, and obtains the moulding of the present embodiment.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any modifications of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.
Claims (7)
1. a forming method for moulding, is characterized in that, comprises the following steps:
S1, employing hot pressing or injection molding forming method, the thermoplastic elastomer (TPE) profiling overcoat that preparation is mated with moulding profile;
S2, described thermoplastic elastomer (TPE) profiling is placed on outward in mould, after matched moulds, carries out injection mo(u)lding, after die sinking, peel off described thermoplastic elastomer (TPE) profiling overcoat, obtain described moulding.
2. forming method according to claim 1, is characterized in that, described thermoplastic elastomer (TPE) profiling overcoat is silicon rubber profiling overcoat.
3. forming method according to claim 1 and 2, is characterized in that, in S1, mold temperature when described thermoplastic elastomer (TPE) profiling overcoat is prepared in hot pressing or injection mo(u)lding is 40-200 ℃.
4. forming method according to claim 1 and 2, is characterized in that, in S1, described thermoplastic elastomer (TPE) shore hardness is not less than 60A, and the minimum thickness of profiling overcoat is not less than 0.5mm.
5. forming method according to claim 1, is characterized in that, also comprises the step of the inner surface of described thermoplastic elastomer (TPE) profiling overcoat being carried out to deburring, burr after S1, before S2.
6. forming method according to claim 1, is characterized in that, after described thermoplastic elastomer (TPE) profiling is placed in mould outward, before matched moulds, also comprises toward described thermoplastic elastic profiling overcoat inner surface and covers the step that releasing agent forms separate layer.
7. forming method according to claim 6, is characterized in that, described releasing agent is solvent-borne type, powder-type or paste type releasing agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210215048.5A CN103507204A (en) | 2012-06-27 | 2012-06-27 | Molding method of injection molding element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210215048.5A CN103507204A (en) | 2012-06-27 | 2012-06-27 | Molding method of injection molding element |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103507204A true CN103507204A (en) | 2014-01-15 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210215048.5A Pending CN103507204A (en) | 2012-06-27 | 2012-06-27 | Molding method of injection molding element |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103507204A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105318375A (en) * | 2014-07-28 | 2016-02-10 | 佛山市顺德区美的电热电器制造有限公司 | Induction cooker, panel assembly used for induction cooker and processing method |
| CN105563764A (en) * | 2016-02-23 | 2016-05-11 | 昆山峰实电子科技有限公司 | Die and product without parting line trace and manufacturing method of product |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1134341A (en) * | 1995-03-30 | 1996-10-30 | 埃尔夫阿托化学有限公司 | Process for manufacture of object made of thermoplastic with protected decoration |
| JP2005053154A (en) * | 2003-08-06 | 2005-03-03 | Takagi Seiko Corp | Molding method of decorated article |
| CN101564884A (en) * | 2009-06-05 | 2009-10-28 | 上海名盛汽车饰件有限公司 | Injection molding method for in-mold decoration |
| CN102371646A (en) * | 2010-08-11 | 2012-03-14 | 联想(北京)有限公司 | Preparation method of workpiece |
-
2012
- 2012-06-27 CN CN201210215048.5A patent/CN103507204A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1134341A (en) * | 1995-03-30 | 1996-10-30 | 埃尔夫阿托化学有限公司 | Process for manufacture of object made of thermoplastic with protected decoration |
| JP2005053154A (en) * | 2003-08-06 | 2005-03-03 | Takagi Seiko Corp | Molding method of decorated article |
| CN101564884A (en) * | 2009-06-05 | 2009-10-28 | 上海名盛汽车饰件有限公司 | Injection molding method for in-mold decoration |
| CN102371646A (en) * | 2010-08-11 | 2012-03-14 | 联想(北京)有限公司 | Preparation method of workpiece |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105318375A (en) * | 2014-07-28 | 2016-02-10 | 佛山市顺德区美的电热电器制造有限公司 | Induction cooker, panel assembly used for induction cooker and processing method |
| CN105563764A (en) * | 2016-02-23 | 2016-05-11 | 昆山峰实电子科技有限公司 | Die and product without parting line trace and manufacturing method of product |
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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 | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20140115 |