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Blow Molding - Processing Technology
Date: 2019-06-19 10:15
Views: 4608
Source: Internet
blow molding (Blow Molding) is extrusion or injection molding made formed type 坯(Parison) rear, will 此插入 type inner, toward inner 吹入空 gas rear, cooling solid made formed 特殊形状 in products.
第一步: toward machine to raw materials resin. to machine resin screw scratch hot and temperature degree 熔化, 送入挤塑 machine Die/Head inner.
第二步:挤塑 machine Die/Head export 呈圆柱形, from export extrusion 圆柱形挤 pressure parts. will 此圆柱形挤 pressure parts formed is type 坯.
第三步: Die/Head outer generally 由2 separation mold. separation left right mold upper has molding product 形状 空腔, type 腔(Cavity).
第四步: in type in Die export pressure formed combined long degree rear, will 2 separation type inner type 坯.
第五步: in type type inner pressure shrink gas, make type 坯吹胀 formed and type same 形状.
第六步:吹胀 molding 腔形状 rear, in 此状态 lower cooling.
第七步: will in type inner type cooling to normal temperature make its solid rear, type 腔取出 product.
第八步: remove viscous in product upper necessary separation, formed product molding.
blow molding product
selection used for blow molding resin 时, 应考虑MI, density and resin molecular weight distribution. generally 说, MI small 于2时, blow molding relatively good, molecular weight distribution wide, molding property can good.
随 density rigid property and ESCR 关系, for resin rigid property and ESCR property can adjustment tool has most large effect/influence factors is density. density 变化, rigid property and ESCR property can versus 反 结果. blow molding product main/primary used for container, therefore molding parts outer tool has can 承受一定 pressure rigid property, tool has ESCR property can, ensure in cold hot gas long time use 时, 也不泄露 inner material.
for resin rigid property and ESCR property can adjustment tool has most large effect/influence factors is density. density 变化, rigid property and ESCR property can versus 反 结果.
第一步: toward machine to raw materials resin. to machine resin screw scratch hot and temperature degree 熔化, 送入挤塑 machine Die/Head inner.
第二步:挤塑 machine Die/Head export 呈圆柱形, from export extrusion 圆柱形挤 pressure parts. will 此圆柱形挤 pressure parts formed is type 坯.
第三步: Die/Head outer generally 由2 separation mold. separation left right mold upper has molding product 形状 空腔, type 腔(Cavity).
第四步: in type in Die export pressure formed combined long degree rear, will 2 separation type inner type 坯.
第五步: in type type inner pressure shrink gas, make type 坯吹胀 formed and type same 形状.
第六步:吹胀 molding 腔形状 rear, in 此状态 lower cooling.
第七步: will in type inner type cooling to normal temperature make its solid rear, type 腔取出 product.
第八步: remove viscous in product upper necessary separation, formed product molding.
blow molding product
selection used for blow molding resin 时, 应考虑MI, density and resin molecular weight distribution. generally 说, MI small 于2时, blow molding relatively good, molecular weight distribution wide, molding property can good.
随 density rigid property and ESCR 关系, for resin rigid property and ESCR property can adjustment tool has most large effect/influence factors is density. density 变化, rigid property and ESCR property can versus 反 结果. blow molding product main/primary used for container, therefore molding parts outer tool has can 承受一定 pressure rigid property, tool has ESCR property can, ensure in cold hot gas long time use 时, 也不泄露 inner material.
for resin rigid property and ESCR property can adjustment tool has most large effect/influence factors is density. density 变化, rigid property and ESCR property can versus 反 结果.
