Blow molding yɛ mfiridwuma a wɔde di dwuma kɛse wɔ plastic nneɛma a wɔyɛ mu, titiriw na wɔde yɛ plastic afã horow a ɛyɛ tokuru te sɛ nsukorade, kar afã horow, ne mfiridwuma mu nsukorabea. Ne nnyinasosɛm titiriw ne sɛ wɔde mframa a wɔahyɛ no den bedi dwuma de ahyɛ plastic parison a ɛyɛ hyew na ayɛ mmerɛw mu akɔ nkuku no mu ɔfasu no mu. Bere a ayɛ nwini akyi no, wɔyɛ ade no ma ɛbɛyɛ tokuru a wɔpɛ. Saa kwan yi kyerɛ sɛ ɛyɛ adwuma yie a ɛkorɔn, nneɛma a wɔde di dwuma yie, na ɛfata ma nneɛma akɛseɛ-yɛ.
Wɔkyekyɛ blow molding mu titiriw ayɛ no akwan abiɛsa: extrusion blow molding, injection blow molding, ne stretch blow molding. Extrusion blow molding ne ɔkwan a wɔtaa fa so. Wɔde plastic nwene na wɔde fa extruder so de gu tubular parison mu. Afei wɔto nkuku no mu na wɔde mframa a wɔahyɛ no den ba ma ɛyɛ parison no kɔ nkuku no mu. Injection blow molding fi ase denam injection molding a parison a ɛwɔ nnyinaso, a afei wɔde kɔ blow mold mu de wie tokuru nhyehyɛe no. Saa kwan yi fata ma nneɛma nketewa a ɛhwehwɛ sɛ wɔyɛ no pɛpɛɛpɛ kɛse wɔ nsusuwii mu. Stretch blow molding de axial stretching step ka ho ansa na blow molding, na ɛma ade no mfiridwuma su ne nea ɛda adi no tu mpɔn kɛse. Wɔtaa de di dwuma wɔ PET nkotoku a wɔyɛ mu.
Nneɛma atitiriw a ɛwɔ nkɛntɛnso wɔ blow molded afã horow no su so nkɛntɛnso bi ne raw material paw, process parameter control, ne mould design. Nneɛma a wɔtaa de bɔ nwene no bi ne polyethylene (PE), polypropylene (PP), ne polyethylene terephthalate (PET), a ɛhwehwɛ sɛ ahoɔden a ɛkyɛn so ma ɛyow na ɛma ɔhyew no gyina pintinn. Ɛsɛ sɛ wɔyɛ nhyehyɛe a wɔde yɛ adwuma te sɛ ɔhyew a ɛyɛ hyew, nhyɛso a wɔbɔ, ne bere a wɔde yɛ onwini no yiye a egyina nneɛma no su so na wɔakwati ɔhaw ahorow te sɛ ɔfasu no mu duru a ɛnteɛ ne nhyɛso a ɛwɔ mu. Nkuku ho nhyehyɛe nya demolding efficiency ne product no hwɛbea so nkɛntɛnso tẽẽ, na ɛhwehwɛ sɛ wɔde mframa a wɔde fa mu ne onwini nhyehyɛe ahorow si hɔ yiye.
Mfiridwuma mu nkɔso ama akwan foforo te sɛ multi-cavity moulds, co-extrusion blow molding, ne micro-blow molding aba, na ɛtrɛw bio sɛnea wɔde di dwuma wɔ blow molded afã horow no mu. Daakye, sɛ wɔde automated control ne digital simulation mfiridwuma ka ho a, blow molding bɛkɔ so anya nkɔso wɔ ɔkwan a ɛyɛ hare na ɛyɛ pɛpɛɛpɛ so, na adi nea ɛkorɔn{4}}end manufacturing ahwehwɛde ahorow ho dwuma.
