CN108454006A - The method for solving multi-layer injection molding part iridescence - Google Patents
The method for solving multi-layer injection molding part iridescence Download PDFInfo
- Publication number
- CN108454006A CN108454006A CN201810254898.3A CN201810254898A CN108454006A CN 108454006 A CN108454006 A CN 108454006A CN 201810254898 A CN201810254898 A CN 201810254898A CN 108454006 A CN108454006 A CN 108454006A
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- CN
- China
- Prior art keywords
- layer
- injection molding
- iridescence
- molding part
- layer injection
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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.)
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Classifications
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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
- B29C45/16—Making multilayered or multicoloured 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
- B29C45/16—Making multilayered or multicoloured articles
- B29C2045/1682—Making multilayered or multicoloured articles preventing defects
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
The present invention relates to a kind of methods solving multi-layer injection molding part iridescence, gate location when mainly later layer being molded is arranged in the position for making the shortest distance of the cast gate with adjacent front and back two layers of layering face keep 2mm or more, and the fusing point of later layer injected plastics material is not higher than the fusing point of preceding layer injected plastics material.The present invention is due to the phenomenon that being avoided that the material layer of the high shear near cast gate flings previous layer of material, weakening the previous layer of material refuse having been cured, to achieve the purpose that solve double-colored intersection colour mixture defect.
Description
Technical field
The present invention relates to a kind of methods solving multi-layer injection molding part iridescence, are particularly suitable for comprising transparent material and opaque
The processing of the multi-layer injection molding part of material, belongs to multi-layer injection molding technical field.
Background technology
In multi-layer injection molding when different layers use different colours material, in later layer forming process, high-temperature material often will
The material refuse that preceding layer has been cured, causes the material of preceding layer to be mixed into later layer, especially when later layer is
When transparent material, dizzy reach in later layer of the material of preceding layer visually becomes apparent.This double-colored mixing phenomena seriously affects
The quality of multi-layer injection molding part.
Invention content
The present invention is intended to provide a kind of method solving multi-layer injection molding part iridescence, to improve the sight of multiple-layer polychromatic moulding
Feel quality.
The main technical schemes of the present invention have：
A method of solving multi-layer injection molding part iridescence：Gate location setting when later layer is molded makes cast gate and phase
The shortest distance in two layers of layering face keeps the position of 2mm or more before and after neighbour.
The fusing point of later layer injected plastics material is preferably not higher than the fusing point of preceding layer injected plastics material.
The ratio between cross-sectional aspect of cast gate is preferably smaller than 3:1, and sectional area is more preferably greater than 20mm2。
This method is directed to double injection part, and preceding layer injection molding uses opaque colored materials, and later layer injection molding is using saturating
Bright colored materials.
The beneficial effects of the invention are as follows：
Gate location when later layer is molded by the present invention be arranged make cast gate away from adjacent front and back two layers of layering face at least
The position of 2mm avoids the material layer of the high shear near cast gate from flinging previous layer of material, weakens the preceding layer material having been cured
The phenomenon that bed of material refuse, to achieve the purpose that solve double-colored intersection colour mixture defect.It is specifically tied by controlling cast gate
Structure size, the solution of iridescence problem when further ensuring that multi-layer injection molding.
Description of the drawings
Fig. 1 is mechanism schematic diagram of the present invention.
Specific implementation mode
The invention discloses a kind of methods solving multi-layer injection molding part iridescence, are that gate location when being molded later layer is set
It sets in the position for making the shortest distance of the cast gate with adjacent front and back two layers of layering face A keep 2mm or more.
The fusing point of later layer injected plastics material is preferably not higher than the fusing point of preceding layer injected plastics material, makes to further decrease
The risk of the cured material refuse of preceding layer.
The cross-sectional area of cast gate is at least 20mm2, to reduce stream into the shear rate for pouring place, to a certain extent may be used
Fever herein is reduced, avoids the appearance of excessive temperature as far as possible.
The cross-sectional shape of cast gate is rectangle, and length-width-ratio is preferably less than 3:1.Avoid cast gate is excessively long and narrow from leading to stream
Shear rate is sharply increased
When later layer is molded, empirically and field adjustable situation controls the injection speed upper limit can on the one hand it drop
The shear rate of stream near low cast gate, on the other hand reduces the agitation amplitude of stream near cast gate, to reduce this layer of injection molding
Stream influences the remelting of previous layer of material, and the solution of iridescence problem is further ensured that on the basis of above-mentioned new pouring gate structure
Certainly.
This method is directed to double injection part in the present embodiment, and preceding layer injection molding uses opaque colored materials, after
One layer of injection molding uses transparent colored materials.
By taking double injection shown in FIG. 1 as an example, what dispensable mould 1 filled is body color material, and what quadratic form 2 filled is
Light colour material.In quadratic form stowing operation, although 4 near zone shear rate of cast gate is maximum, Shear heating is most, due to it
It is kept at a distance from 2mm or more with the interface of dispensable mould and quadratic form, interface is made to be in the foot centered on quadratic form cast gate
So that the material of molten condition generates except the fan-shaped high-temperature area (being similar to the cast gate region that nearby stream 5 is illustrated) flowed,
Therefore the Transparent color material of the high shear near cast gate can be effectively avoided to fling the body color material of dispensable mould so as to consolidate
Even if some refuse of the body color material of change, is shown in remelting region 3, is also unlikely to flow to other positions, to
Eliminate transparent region iridescence phenomenon.
Claims (4)
1. a kind of method solving multi-layer injection molding part iridescence, it is characterised in that：Gate location setting when later layer is molded exists
The shortest distance in cast gate and adjacent front and back two layers of layering face is set to keep the position of 2mm or more.
2. the method for solving multi-layer injection molding part iridescence as described in claim 1, it is characterised in that：Later layer injected plastics material melts
Fusing point of the point not higher than preceding layer injected plastics material.
3. the method for solving multi-layer injection molding part iridescence as described in claim 1, it is characterised in that：The cross-sectional aspect of cast gate it
Than being less than 3:1, and sectional area is more than 20mm2。
4. the method for the solution multi-layer injection molding part iridescence as described in any one of claim 1-3 claims, feature exist
In：This method is directed to double injection part, and preceding layer injection molding uses opaque colored materials, later layer injection molding to have using transparent
Color material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810254898.3A CN108454006A (en) | 2018-03-27 | 2018-03-27 | The method for solving multi-layer injection molding part iridescence |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810254898.3A CN108454006A (en) | 2018-03-27 | 2018-03-27 | The method for solving multi-layer injection molding part iridescence |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108454006A true CN108454006A (en) | 2018-08-28 |
Family
ID=63237480
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810254898.3A Pending CN108454006A (en) | 2018-03-27 | 2018-03-27 | The method for solving multi-layer injection molding part iridescence |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108454006A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108858972A (en) * | 2018-06-29 | 2018-11-23 | 华域视觉科技(上海)有限公司 | It is a kind of by being rationally layered the method for solving multi-color injection molded part colour mixture defect, a kind of multi-color injection molded part, a kind of automobile lamp |
| CN110667050A (en) * | 2019-11-15 | 2020-01-10 | 华域视觉科技(上海)有限公司 | Sprue structure for injection molding of double-color car lamp |
| CN110900954A (en) * | 2019-12-09 | 2020-03-24 | 渲美美健（深圳）科技股份有限公司 | Injection molding process |
| CN112549439A (en) * | 2020-11-09 | 2021-03-26 | 宁波圣捷喷雾泵有限公司 | Multicolor injection molding piece and injection molding process thereof |
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| CN202106505U (en) * | 2011-05-30 | 2012-01-11 | 圣美精密工业(昆山)有限公司 | Feeding point mechanism of double-color forming mold |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108858972A (en) * | 2018-06-29 | 2018-11-23 | 华域视觉科技(上海)有限公司 | It is a kind of by being rationally layered the method for solving multi-color injection molded part colour mixture defect, a kind of multi-color injection molded part, a kind of automobile lamp |
| CN110667050A (en) * | 2019-11-15 | 2020-01-10 | 华域视觉科技(上海)有限公司 | Sprue structure for injection molding of double-color car lamp |
| CN110900954A (en) * | 2019-12-09 | 2020-03-24 | 渲美美健（深圳）科技股份有限公司 | Injection molding process |
| CN110900954B (en) * | 2019-12-09 | 2022-02-22 | 渲美美健（深圳）科技股份有限公司 | Injection molding process |
| CN112549439A (en) * | 2020-11-09 | 2021-03-26 | 宁波圣捷喷雾泵有限公司 | Multicolor injection molding piece and injection molding process thereof |
| CN112549439B (en) * | 2020-11-09 | 2021-11-02 | 宁波圣捷喷雾泵有限公司 | Multicolor injection molding piece and injection molding process thereof |
| WO2022095285A1 (en) * | 2020-11-09 | 2022-05-12 | 宁波圣捷喷雾泵有限公司 | Multicolor injection molded piece and injection molding process therefor |
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| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: 201821 Yecheng Road, Shanghai, No. 767, No. Applicant after: Hua Yu vision technology (Shanghai) Co., Ltd. Address before: 201821 767 Yecheng Road, Jiading District, Jiading District, Shanghai Applicant before: Xiaoxi Car Lights Co., Ltd., Shanghai |
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Application publication date: 20180828 |