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Why are minimalist designs becoming trendy on cosmetic tubes
PET plastic hose is such a blow out
by：Lisson
2020-11-16
PET plastic hose is such a blow out
hollow blow molding is put extrusion or injection molding of the proceeds of the tube billet mold, the tube billet zhongtong into the compressed air to blow up, in order to close to the cavity wall, then through cooling mold release products have hollow molding method. The molding method to produce the hose, pot, all kinds of packaging containers such as barrels, daily supplies, children's toys and so on.
hollow blow molding category 1, according to different forming methods
extrusion - — Blow molding, the production method is simple, high output, low accuracy and application.
injection - — Blow molding, high precision, good quality, the price is high, suitable for mass products.
2, according to different
ordinary blow molding process;
stretch blow molding, product by the tensile, high strength, good air tightness.
extrusion - Stretch - Blow molding
injection - Stretch - Blow molding
3, according to different pipe layer classification
single blow molding;
multilayer blow molding: good comprehensive performance, production is complex, the packing of the products is suitable for high packing requirements.
blow molding device 1,
needle method process: closed - — Wear out the parison wall - — Blow - — Blowing needle retraction - — Melt material healing
features: suitable for continuous rotary blow molding, small containers, with a handle.
2, top-blowing process: the closed - — At the bottom of the clamp - — At the top of the open - — Core ventilation - — Blow - — Rotating tool to remove excess stock
features: core for spindle, blowing institutions simplified
01 blow molding process influence factors, the blowing pressure
in the blow molding, compressed air, there are two, one is to make the tube billet distended and close to the cavity wall, the desired shape of the form; Second, the cooling effect. According to different type plastic varieties and billet temperature, the air pressure is different also, general control in 0. 2 - 0. Between 7 million mpa, can make the products after the molding is the most suitable shape and decorative pattern show clear pressure.
02, inflatable speed, blowing in order to shorten the time for products to get a uniform thickness and good surface, air speed, Through the air volume per unit time) As far as possible big some, but also shoulds not be too large, otherwise it will bring bad effects products.
3, blowing ratio
are usually the size of the products and the ratio of the parison dimension referred to as blowing ratio. When the size and weight of the parison certain, the greater the size of products, the greater the parison swell ratio also. According to the shape of the varieties, properties, products of the plastic and the size and the size of the parison to decide the size of the blowing ratio. The blowing ratio control is usually placed in 2, 4 times.
4, mould in order to guarantee the product quality, mould temperature should be distributed evenly, die temperature keeps at 20 - 50℃。 Mold temperature is too low, will lower the extensibility of the clamp mouth plastic, not easy to swell, and make the products more in this section, at the same time make the molding difficulty, the outline of products and decorative pattern is not clear. Mold temperature is too high, cooling time extended, the production cycle longer. Products demoulding deformation, shrinkage increases. Die temperature depends on the variety of plastic, when the plastic glass transition temperature is higher, can use higher mold temperatures; On the other hand, the lower mould temperature as possible.
05, molding cycle blow molding cycle including extrusion parison, clipping parison. Clamping, blowing air, cooling and deflated, open, take out products ( Subsequent modification, form a complete set, with another packaging) Such process.
hollow blow molding is put extrusion or injection molding of the proceeds of the tube billet mold, the tube billet zhongtong into the compressed air to blow up, in order to close to the cavity wall, then through cooling mold release products have hollow molding method. The molding method to produce the hose, pot, all kinds of packaging containers such as barrels, daily supplies, children's toys and so on.
hollow blow molding category 1, according to different forming methods
extrusion - — Blow molding, the production method is simple, high output, low accuracy and application.
injection - — Blow molding, high precision, good quality, the price is high, suitable for mass products.
2, according to different
ordinary blow molding process;
stretch blow molding, product by the tensile, high strength, good air tightness.
extrusion - Stretch - Blow molding
injection - Stretch - Blow molding
3, according to different pipe layer classification
single blow molding;
multilayer blow molding: good comprehensive performance, production is complex, the packing of the products is suitable for high packing requirements.
blow molding device 1,
needle method process: closed - — Wear out the parison wall - — Blow - — Blowing needle retraction - — Melt material healing
features: suitable for continuous rotary blow molding, small containers, with a handle.
2, top-blowing process: the closed - — At the bottom of the clamp - — At the top of the open - — Core ventilation - — Blow - — Rotating tool to remove excess stock
features: core for spindle, blowing institutions simplified
01 blow molding process influence factors, the blowing pressure
in the blow molding, compressed air, there are two, one is to make the tube billet distended and close to the cavity wall, the desired shape of the form; Second, the cooling effect. According to different type plastic varieties and billet temperature, the air pressure is different also, general control in 0. 2 - 0. Between 7 million mpa, can make the products after the molding is the most suitable shape and decorative pattern show clear pressure.
02, inflatable speed, blowing in order to shorten the time for products to get a uniform thickness and good surface, air speed, Through the air volume per unit time) As far as possible big some, but also shoulds not be too large, otherwise it will bring bad effects products.
3, blowing ratio
are usually the size of the products and the ratio of the parison dimension referred to as blowing ratio. When the size and weight of the parison certain, the greater the size of products, the greater the parison swell ratio also. According to the shape of the varieties, properties, products of the plastic and the size and the size of the parison to decide the size of the blowing ratio. The blowing ratio control is usually placed in 2, 4 times.
4, mould in order to guarantee the product quality, mould temperature should be distributed evenly, die temperature keeps at 20 - 50℃。 Mold temperature is too low, will lower the extensibility of the clamp mouth plastic, not easy to swell, and make the products more in this section, at the same time make the molding difficulty, the outline of products and decorative pattern is not clear. Mold temperature is too high, cooling time extended, the production cycle longer. Products demoulding deformation, shrinkage increases. Die temperature depends on the variety of plastic, when the plastic glass transition temperature is higher, can use higher mold temperatures; On the other hand, the lower mould temperature as possible.
05, molding cycle blow molding cycle including extrusion parison, clipping parison. Clamping, blowing air, cooling and deflated, open, take out products ( Subsequent modification, form a complete set, with another packaging) Such process.
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