IṢẸ́ ỌNÀ
ẸWÀ ÀTI ÌLERA
IṢẸ́ ỌWỌ́
ÀṢÀ ÀTI ÌTÀN
ÌṢERÉ
ÀYÍKÁ
OÚNJẸ ÀTI OHUN MÍMU
REVERSE ENGINEERING
SÁYẸ́ǸSÌ
ERÉ ÌDÁRAYÁ
ÌMỌ̀-Ẹ̀RỌ
ÀWỌN OHUN WÍWỌ̀
Plastic Blow Moulding: PET Bottles and HDPE Drums
Hollow plastic is blown. A PET drinks bottle starts as an injection-moulded preform, a thick test tube with the finished screw neck; it is reheated, usually with infrared heaters, above its glass transition temperature, stretched by a core rod and blown with high-pressure air against a cold metal mould. Drums and jerrycans are extrusion blow moulded: a hot tube, the parison, is extruded, closed in the mould and blown out.
Ilọsíwájú
Seconds per bottle
Ìlànà
1
1
Preforms
Preforms
PET preforms come from injection moulding with the neck finished; they are dried and stored.
Àwọn ohun èlò fún ìgbésẹ̀ yìí:
Àkọ́kọ́ṣe ìgò100 ẹyọ2
2
Reheat
Reheat
Preforms pass infrared heaters until soft, just above PET's glass transition temperature.
Àwọn irinṣẹ́ tí a nílò:
Ẹ̀rọ ìfẹ́-àwòṣe orí tábìlì3
3
Stretch and blow
Stretch and blow
In the closed bottle mould a rod stretches the preform lengthwise while high-pressure air blows it out to the mould wall, which cools it.
Àwọn irinṣẹ́ tí a nílò:
Ẹ̀rọ ìfẹ́-àwòṣe orí tábìlì
Àwòṣe ìfẹ́4
4
Extrusion blow moulding
Extrusion blow moulding
For HDPE drums, a parison is extruded downward, the mould closes on it, pinching the bottom, and air blows it out.
Àwọn ohun èlò fún ìgbésẹ̀ yìí:
Àwọn kóró HDPE20 kgÀwọn irinṣẹ́ tí a nílò:
Ẹ̀rọ ìtújáde ṣíṣuÀwòṣe ìfẹ́5
5
Check
Check
Bottles are checked for even wall thickness and leaks.
Àwọn irinṣẹ́ tí a nílò:
Òṣùwọ̀n Kálípà Díjítà Ìnṣì 6Àwọn ohun-èlò
2- 100 ẹyọÀyè
- 20 kgÀyè
Àwọn irinṣẹ́ tó nílò
4- Àyè
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