Blow molding ngu ai gaw plastic arung arai ni hpe galaw shapraw na matu grai lang ai ladat langai rai nna, grau nna gaw n-gun n rawng ai hka htung ni, mawdaw arung arai ni, bungli galaw ai arung arai ni hpe galaw shapraw na matu grai lang ai ladat langai rai nga ai. Shaning law law sharin hkam la ngut ai hpang, sharin hkam la ai ni a matu madung mahkrum madup nkau mi hpe kadun dawk tsun dan sai.
Langai, arung arai ni hpe lata ai gaw ahkyak ai. Polyethylene (PE), polypropylene (PP), hte polyethylene terephthalate (PET) ni hpe n-gun dat hte galaw ai arung arai ni hpe lang ma ai. Shanhte a lwi ai atsam, melt index, hte chemical hpe ninghkap lu ai atsam ni gaw, n-gun rawng ai atsam hpe hkrak hkra machyi shangun ai. Ga shadawn, n-gun ja ai -polyethylene (HDPE) gaw n-gun ja ai hka htung ni a matu grau htuk manu ai, n-gun n law ai polyethylene (LDPE) gaw n-gun n rawng ai arung arai ni a matu grau htuk manu ai. Dai hta n-ga, raw materials ni hpe katsi hkra galaw na matu mung ahkyak ai. Ngam ai hka gaw bubbles (sh) ntsa lam n kaja ai lam ni hpe byin shangun ai majaw, pre-drying hpe 80-100℃hta hkying hkum 2-4 tup galaw ai.
Mold hkrang shapraw ai lam hte process parameter ni hpe grau kaja hkra galaw ai lam ni mung ahkyak ai lam ni rai nga ai. Blow molds ni gaw sink marks (sh) nsam galai shai ai lam n byin hkra, langai sha re ai katsi ai lam hpe galaw ra ai. Kaja wa nga yang, n-gun n-gun hpe 20-60℃lapran hta hkang ai, dai hta n-ga, n-gun rawng ai arung arai amyu hta hkan nna, laksan manu hpe hkang ai. Blowing pressure hte aten masat ai lam ni mung maren sha ahkyak nga ai. Grai n-gun n law ai shaloi bunghku n bung ai hku n-gun rawng wa nna, grai law ai n-gun rawng yang parison hpe n-gun n rawng hkra galaw ya lu ai. Practice hku yu yang, n-gun n rawng ai daw ni a matu nbung n-gun hpe 0.3 hte 1.0 MPa lapran hta tawn da nna, nbung n-gun hpe 2 hte 4 lapran hta tawn da ai hpe grau ra sharawng ai.
Dai hta n-ga, shada da galaw shapraw ai lam hta byin pru wa ai manghkang ni hpe yaw shada let hparan ra ai. Ga shadawn, parison droop hpe extrusion lawan ai hku jat ai (sh) melt n-gun hpe shayawm ai hku nna grau kaja hkra galaw mai ai; bunghku n-gun n bung ai majaw, die gap hpe gram lajang ra ai (sh) gap ai aten hpe kaja dik htum galaw ra ai. Post-processing galaw ai lahkam ni, shing nrai, shingnip shingna, jasan jaseng ai lam, hte ntsa lam hpe gram lajang ai lam (spray (sh) electroplating zawn re ai ni) ni mung, hpang jahtum na arung arai a gat lawk hta shingjawng lu ai atsam hpe hkrak hkrak hkra machyi shangun ai.
Tsun ga nga yang, blow-molded parts ni a quality gaw, arung arai, jak rai, galaw sa wa ai lam, mahkrum madup ni hpe tsep kawp hkang lu ai hta madung nga ai. Matut manoi galaw shapraw ai parameters ni hte jak rung ni hpe gram lajang ai lam ni hpe grau kaja hkra galaw ai gaw, bungli galaw ai lam hpe grai kaja hkra galaw ya lu nna, manu jahpu hpe mung shayawm ya lu ai majaw, hpaga lam a matu grau shingjawng lu ai hparan ladat ni hpe jaw ya lu ai.
