MY132152A - Method for controlling skin thickness of plastic article made with controlled density - Google Patents
Method for controlling skin thickness of plastic article made with controlled densityInfo
- Publication number
- MY132152A MY132152A MYPI96000854A MYPI9600854A MY132152A MY 132152 A MY132152 A MY 132152A MY PI96000854 A MYPI96000854 A MY PI96000854A MY PI9600854 A MYPI9600854 A MY PI9600854A MY 132152 A MY132152 A MY 132152A
- Authority
- MY
- Malaysia
- Prior art keywords
- plastic article
- mold cavity
- cavity
- mixture
- interior
- Prior art date
Links
- 238000000034 method Methods 0.000 title abstract 2
- 239000000203 mixture Substances 0.000 abstract 3
- 238000000465 moulding Methods 0.000 abstract 3
- 239000004604 Blowing Agent Substances 0.000 abstract 2
- 238000002347 injection Methods 0.000 abstract 2
- 239000007924 injection Substances 0.000 abstract 2
- 210000003850 cellular structure Anatomy 0.000 abstract 1
- 230000006835 compression Effects 0.000 abstract 1
- 238000007906 compression Methods 0.000 abstract 1
- 239000006260 foam Substances 0.000 abstract 1
- 239000000463 material Substances 0.000 abstract 1
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
- B29C45/16—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
- 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
- B29C44/04—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 consisting of at least two parts of chemically or physically different materials, e.g. having different densities
Landscapes
- Injection Moulding Of Plastics Or The Like (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
Abstract
A METHOD OF MOLDING A PLASTIC ARTICLE WITH A FOAMED INTERIOR AND A DENSE OUTER SKIN OF A DESIRED THICKNESS, WHEREBY A BLOWING AGENT IS MIXED WITH A PLASTIC MATERIAL AND THE MIXTURE IS INJECTED, UNDER PRESSURE, INTO A MOLD CAVITY OF A MOLD UNIT. THE MIXTURE IS ALLOWED TO COOL ALONG THE MOLDING SURFACES OF THE MOLD CAVITY FOR A DETERMINED AMOUNT OF TIME. THE PRESSURE IS RELEASED AND THE MOLD CAVITY EXPANDED TO ALLOW THE BLOWING AGENT TO FOAM THE INTERIOR OF THE PLASTIC ARTICLE. THE MOLDING CAVITY IS THEN COMPRESSED TO ACHIEVE THE DESIRED DIMENSIONS FOR THE PLASTIC ARTICLE, AND TO GIVE THE INTERIOR A UNIFORM CELLULAR STRUCTURE. CONTROL OVER THE TIMING OF THE EXPANSION OF THE MOLD CAVITY, THE INJECTION TEMPERATURE, THE RATE OF INJECTION OF THE MIXTURE, THE RATE OF WHICH THE CAVITY IS EXPANDED AND COMPRESSED, AND THE TIMING OF THE COMPRESSION OF THE MOLD CAVITY ALLOW A SKIN OF DESIRED THICKNESS TO BE FORMED ON THE PLASTIC ARTICLE.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US53548595A | 1995-09-28 | 1995-09-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| MY132152A true MY132152A (en) | 2007-09-28 |
Family
ID=38819582
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| MYPI96000854A MY132152A (en) | 1995-09-28 | 1996-03-08 | Method for controlling skin thickness of plastic article made with controlled density |
Country Status (3)
| Country | Link |
|---|---|
| KR (1) | KR970014977A (en) |
| MX (1) | MX9601053A (en) |
| MY (1) | MY132152A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2940340T3 (en) * | 2013-12-12 | 2023-05-05 | Diab Int Ab | Expanded PVC foam |
-
1996
- 1996-03-08 MY MYPI96000854A patent/MY132152A/en unknown
- 1996-03-20 MX MX9601053A patent/MX9601053A/en unknown
- 1996-03-28 KR KR1019960008690A patent/KR970014977A/en not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| MX9601053A (en) | 1997-03-29 |
| KR970014977A (en) | 1997-04-28 |
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