CN103878922A - Car headlight housing injection-molding method - Google Patents
Car headlight housing injection-molding method Download PDFInfo
- Publication number
- CN103878922A CN103878922A CN201410118041.0A CN201410118041A CN103878922A CN 103878922 A CN103878922 A CN 103878922A CN 201410118041 A CN201410118041 A CN 201410118041A CN 103878922 A CN103878922 A CN 103878922A
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- CN
- China
- Prior art keywords
- plastics material
- injection
- injected plastics
- moulding process
- injection moulding
- 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
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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
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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
- B29C2045/0096—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor drying the moulding material before injection, e.g. by heating
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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
- B29C2045/0098—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor shearing of the moulding material, e.g. for obtaining molecular orientation or reducing the viscosity
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses a car headlight housing injection-molding method. The injection-molding method comprises the following steps: cutting an injection-molding material into particles, rinsing by purified water which can pass through a 200-mesh sieve, drying for 2 hours at the temperature of 100-150 DEG C, heating and performing mechanical shearing at the temperature of 150-200 DEG C so as to be in a molten state, and performing injection molding at the pressure of 25-30Mpa. A headlight housing obtained by adopting the method is high in transparency and excellent in mechanical property.
Description
Technical field
The present invention has about a kind of injection moulding process, particularly as the processing method of automobile headlamp outer casing member.
Background technology
As typical nonmetal parts part in automobile, be an important moulding through the automobile headlamp of injection mo(u)lding.
Injection mo(u)lding claims again injection-molded moulding, and it is a kind of forming method of injecting the molding of holding concurrently.The advantage of injection molding forming method is that speed of production is fast, efficiency is high, operation can realize automation, designs and varieties are many, shape can go from the simple to the complex, size can be descending, and product size is accurate, and product easily updates, the product of energy forming shape complexity, injection mo(u)lding is applicable to the processing and forming fields such as a large amount of productions and complex-shaped product.Disadvantageous one side is that die cost is high, and cleaning difficulty, so small lot goods just should not adopt this method moulding.The goods of moulding have in this way: connector on housing of TV set, transistor radio shell, electrical equipment, knob, coil rack, gear, automobile lampshade, teacup, rice bowl, soap box, bathtub, sandals etc.
Owing to should thering is good light transmittance as automobile headlamp after processing, to guarantee the maximum illumination of light, also should guarantee higher temperature tolerance simultaneously, opposing is because degenerating and distortion the inside after long-term irradiation, also have important performance indications to be, it should have certain degree of hardness, resists certain tiny collision and wearing and tearing when as headlight.
And this wherein light transmission be the first-selected index of automobile headlamp.
Summary of the invention
For solving the problems of the technologies described above, the invention provides a kind of automobile headlamp shell injection moulding process, it comprises:
Step 1: injected plastics material is cut into graininess, and filter through 200 object pure water rinsings;
Step 2: be dried 2 hours at 100 ~ 150 ℃;
Step 3: at 150 ~ 200 ℃, described injected plastics material is heated and mechanical shearing, to obtain the injected plastics material of molten state;
Step 4: under 25 ~ 30Mpa by moulding in described molten state injected plastics material injection molding.
The present invention, in despumation, has extended the time of the injected plastics material under low-temperature condition, to obtain more non-crystal structure, and the transparency of lamp housing before strengthening.
The specific embodiment
The invention provides the injection moulding process of automobile headlamp shell, the method makes to have good operating characteristic, particularly light transmittance through the front lamp housing of injection mo(u)lding, to guarantee the maximum illumination of light.
The invention provides a kind of automobile headlamp shell injection moulding process, it comprises for this reason:
Step 1: injected plastics material is cut into graininess, and filter through 200 object pure water rinsings;
Preferably, the diameter of the granular injected plastics material of described one-tenth is less than 0.5 centimetre.In this step, not only accelerate speed for follow-up fusing, also got rid of the interference of impurity to moulding light transmission simultaneously.
Step 2: be dried 2 hours at 100 ~ 150 ℃;
Preferably, be 0.1 ~ 0.2% in the humidity of injected plastics material described in described step 2.Lower humidity is beneficial to injected plastics material and keeps self chemical characteristic, and the mechanical performance of its profiled member also guaranteed accordingly, and its light transmission of dried material is also better simultaneously.
Step 3: at 150 ~ 200 ℃, described injected plastics material is heated and mechanical shearing, to obtain the injected plastics material of molten state;
This step is Aided Machine shearing at low temperatures, makes injected plastics material melting at low temperatures, and the non-crystal structure content in its inside is higher, higher through the front lamp housing transparency of injection mo(u)lding.
Step 4: under 25 ~ 30Mpa by moulding in described molten state injected plastics material injection molding.
The injection moulding of high-voltage high-speed has strengthened mobility, also provides advantage to the formation of non-crystal structure.
As one embodiment of the present of invention, before described step 4, described mould is warming up to 70 ~ 80 ℃.The mould of preheating has not only strengthened the mobility of injected plastics material, and the follow-up formation environment of non-crystal structure when cooling is also provided.
Further optimize as of the present invention, described injection moulding process also comprises step 5: the insulation liquid insulation of employing 80 ~ 100% is cooling after 10 minutes.
In an embodiment of the present invention, first cooling operation after insulation, is conducive to the conversion of molten state phase non-crystal structure, strengthens the transparency of moulding.
Should be appreciated that invention which is intended to be protected is not limited to non-limiting embodiments, should be appreciated that non-limiting embodiments describes as just example.The protection domain of the essence that the application will require is more embodied in the scope that independent claims provide, with and dependent claims.
Claims (5)
1. an automobile headlamp shell injection moulding process, it comprises:
Step 1: injected plastics material is cut into graininess, and filter through 200 object pure water rinsings;
Step 2: be dried 2 hours at 100 ~ 150 ℃;
Step 3: at 150 ~ 200 ℃, described injected plastics material is heated and mechanical shearing, to obtain the injected plastics material of molten state;
Step 4: under 25 ~ 30Mpa by moulding in described molten state injected plastics material injection molding.
2. injection moulding process as claimed in claim 1, is characterized in that: the diameter of the granular injected plastics material of described one-tenth is less than 0.5 centimetre.
3. injection moulding process as claimed in claim 1, is characterized in that: be 0.1 ~ 0.2% in the humidity of injected plastics material described in described step 2.
4. injection moulding process as claimed in claim 1, is characterized in that: before described step 4, described mould is warming up to 70 ~ 80 ℃.
5. injection moulding process as claimed in claim 1, is characterized in that: also comprise step 5: the insulation liquid insulation of employing 80 ~ 100% is cooling after 10 minutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410118041.0A CN103878922A (en) | 2014-03-27 | 2014-03-27 | Car headlight housing injection-molding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410118041.0A CN103878922A (en) | 2014-03-27 | 2014-03-27 | Car headlight housing injection-molding method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103878922A true CN103878922A (en) | 2014-06-25 |
Family
ID=50948193
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410118041.0A Pending CN103878922A (en) | 2014-03-27 | 2014-03-27 | Car headlight housing injection-molding method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103878922A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10317005A (en) * | 1997-05-20 | 1998-12-02 | Sumitomo Osaka Cement Co Ltd | Manufacture of powder injection molded sintered body |
| CN102010694A (en) * | 2010-11-19 | 2011-04-13 | 东莞安尚崇光科技有限公司 | Heat conducting composite material and injection molding process for combining same and LED metal shell |
| CN102731912A (en) * | 2012-07-13 | 2012-10-17 | 北京汽车股份有限公司 | Preparation method of foglight shell of passenger car |
-
2014
- 2014-03-27 CN CN201410118041.0A patent/CN103878922A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10317005A (en) * | 1997-05-20 | 1998-12-02 | Sumitomo Osaka Cement Co Ltd | Manufacture of powder injection molded sintered body |
| CN102010694A (en) * | 2010-11-19 | 2011-04-13 | 东莞安尚崇光科技有限公司 | Heat conducting composite material and injection molding process for combining same and LED metal shell |
| CN102731912A (en) * | 2012-07-13 | 2012-10-17 | 北京汽车股份有限公司 | Preparation method of foglight shell of passenger car |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140625 |