CN103878924A - High-pressure injection molding method - Google Patents
High-pressure injection molding method Download PDFInfo
- Publication number
- CN103878924A CN103878924A CN201410118307.1A CN201410118307A CN103878924A CN 103878924 A CN103878924 A CN 103878924A CN 201410118307 A CN201410118307 A CN 201410118307A CN 103878924 A CN103878924 A CN 103878924A
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- CN
- China
- Prior art keywords
- injection molding
- plastics material
- injected plastics
- injection moulding
- minutes
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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
- B29C45/0001—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor characterised by the choice of material
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
The invention provides a high-pressure injection molding method. The high-pressure injection molding method comprises the following steps: grinding injection molding materials into grains and drying; uniformly adding a swelling agent; heating at 230-250 DEG C and keeping the heat for 20-30 minutes; adding a grinding agent and agitating for 30 minutes by using a screw rod; pressurizing to 1500bar by using an injection molding machine and carrying out injection molding. The method can meet high-pressure and high-speed injection molding requirements and can save the production time.
Description
Technical field
The present invention has a kind of method about injection moulding process, particularly high-pressure injection moulding.
Background technology
Processing technology molded or casting can large batch of acquisition same size part, therefore it has important effect in processing and manufacturing field.
The development interwoveness of developing same molding process of auto industry, due to the parts of the large batch of manufacture same size of auto industry needs, therefore it relies on larger to molding process, it is easy to process, easy for installation, use light, therefore more and more obtain the favor of automobile industry, using plastics part is its inevitable requirement of development of automobile from now on.
So-called injection mo(u)lding (injection molding) refers to injects the injection of material of heating and melting in mould, through cooling with solidify after, obtain the method for products formed.Its detailed process is, granular or powdered plastic are sent into the barrel of heating from the hopper of injection machine, become molten condition through heating plasticizing, exert pressure again and inject closed mold cavity by nozzle, the shape that keeps die cavity to give by hardening by cooling, die sinking has just completed a work period after taking out colloid.
Therefore can adopt high-voltage high-speed injection moulding to be not only a key factor that ensures injection moulding quality, also enhance productivity, shorten the key factor of work period simultaneously.
For the speed production cycle, save energy needs the method for injection moulding under a kind of high pressure be provided, to meet, for example auto industry, the requirement of production in enormous quantities.
Summary of the invention
A kind of method that for this reason the invention provides high-pressure injection moulding, it comprises:
1), injected plastics material is ground and be dry after graininess;
2), in described graininess injected plastics material, evenly add swelling agent;
3), at 230 ~ 250 DEG C, described injected plastics material heating is to molten state and is incubated 20 ~ 30 minutes;
4), add fluidizing reagent and adopt screw rod to stir 30 minutes;
5), be pressurized to 1500bar injection moulding through injection machine.
Injected plastics material in the present invention can be resisted higher injection pressure after expanding treatment under molten condition, and under high pressure mobile and injection moulding of melted material is convenient in the use of fluidizing reagent simultaneously.The method realizes the injection moulding of high pressure, high speed, enhances productivity.
Detailed description of the invention
The invention provides a kind of injection moulding process, the particularly method of injection mo(u)lding part under high pressure, the requirement of producing in enormous quantities to realize similar auto industry, under high pressure, injection moulding also can ensure the surface quality of injection-moulded plastic part simultaneously.
A kind of method that for this reason the invention provides high-pressure injection moulding, it comprises:
1), injected plastics material is ground and be dry after graininess;
2), in described graininess injected plastics material, evenly add swelling agent;
3), at 230 ~ 250 DEG C, described injected plastics material heating is to molten state and is incubated 20 ~ 30 minutes;
4), add fluidizing reagent and adopt screw rod to stir 30 minutes;
5), be pressurized to 1500bar injection moulding through injection machine.
Injected plastics material in the present invention can be resisted higher injection pressure after expanding treatment under molten condition, and under high pressure mobile and injection moulding of melted material is convenient in the use of fluidizing reagent simultaneously.The method realizes the injection moulding of high pressure, high speed, enhances productivity.
Meanwhile, as the preferred embodiments of the present invention, described swelling agent is the mixed solvent of aromatic hydrocarbon and chlorinated hydrocabon.This mixed solvent will make the organic injected plastics material of macromolecule produce expansion, is not only convenient to fusing, and can keeps good mobility in follow-up injection moulding.
As this embodiment preferably, the molar concentration rate of described mixed solvent is 1:2.
As another embodiment of the present invention, in said method, described fluidizing reagent is glass dust.After its fusing, the molecular structure of injected plastics material is effectively adjusted, its mobility is better simultaneously, is conducive to melted material and bears high pressure and keep good mobility.
As the preferred version of this embodiment, the mass ratio of described glass dust and described injected plastics material is 1:1000.
Injection moulding process of the present invention, goes for multiple heat-fusible materials, particularly macromolecule organic material, improves at a lower temperature its mobility, crushing resistance, realizes the fast injection molding under high pressure, enhances productivity and injection moulding quality.
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. a method for high-pressure injection moulding, it comprises:
1), injected plastics material is ground and be dry after graininess;
2), in described graininess injected plastics material, evenly add swelling agent;
3), at 230 ~ 250 DEG C, described injected plastics material heating is to molten state and is incubated 20 ~ 30 minutes;
4), add fluidizing reagent and adopt screw rod to stir 30 minutes;
5), be pressurized to 1500bar injection moulding through injection machine.
2. the method for claim 1, is characterized in that: described swelling agent is the mixed solvent of aromatic hydrocarbon and chlorinated hydrocabon.
3. method as claimed in claim 2, is characterized in that: the molar concentration rate of described mixed solvent is 1:2.
4. the method for claim 1, is characterized in that: described fluidizing reagent is glass dust.
5. method as claimed in claim 4, is characterized in that: the mass ratio of described glass dust and described injected plastics material is 1:1000.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410118307.1A CN103878924A (en) | 2014-03-27 | 2014-03-27 | High-pressure injection molding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410118307.1A CN103878924A (en) | 2014-03-27 | 2014-03-27 | High-pressure injection molding method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103878924A true CN103878924A (en) | 2014-06-25 |
Family
ID=50948195
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410118307.1A Pending CN103878924A (en) | 2014-03-27 | 2014-03-27 | High-pressure injection molding method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103878924A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103102470A (en) * | 2011-11-11 | 2013-05-15 | 新日铁住金化学株式会社 | Flame-retardant epoxy resin, epoxy resin composition containing the epoxy resin as essential component and cured product thereof |
| CN103587025A (en) * | 2013-10-15 | 2014-02-19 | 国家电网公司 | Process for molding butadiene-component-containing plastic thin-wall product |
-
2014
- 2014-03-27 CN CN201410118307.1A patent/CN103878924A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103102470A (en) * | 2011-11-11 | 2013-05-15 | 新日铁住金化学株式会社 | Flame-retardant epoxy resin, epoxy resin composition containing the epoxy resin as essential component and cured product thereof |
| CN103587025A (en) * | 2013-10-15 | 2014-02-19 | 国家电网公司 | Process for molding butadiene-component-containing plastic thin-wall product |
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|---|---|---|---|
| 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 |