POSTED February , 2024
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In current plastic bottle making industry, extrusion blow molding machine and one stage injection blow molding machine are two most commonly used technology to produce different type of bottles.
It is the most commonly used machine to make plastic bottles. Raw material dropped from an extruder into a water cooled mold and get blown into the final product directly.
The pros & cons are as below:
Pros:
Cons:
It is the combination technology of Extrusion blow molding machine and Injection molding machine. Raw Material is firstly injected as preform shape in the first sector, then get blown into bottle shaped final product.
The pros & cons are as below:
Pros:
Cons:
Take 250ml Milk bottle sold in retail store for example, we can find out that there are line marks on the bottle bottom, and relatively worse thickness distribution, and lower bottle strength from those made by Extrusion blow molding machine.
However, for those made by One stage injection blow molding machine, those are more flat in bottom, equally body thickness, accurate neck dimension, less shrinkage and better for cap sealing. However, despite many pros, by One stage injection blow molding machine is not suitable to make handled bottle.
As a result, the two machines both have their pros and cons, and to find your best match machine, feel free to contact Full Shine Plastic Machinery in Taiwan.
The below machine is Full Shine’s latest Model FS-75PFDDV. This energy-saving machine is designed as Four Head + Two Station + Two Layer + View Stripe setup for 2 Layer 1L handled Agro Bottle production with approx. 1200 Bottles hourly production rate. The machine enables the customer to use only 20% Raw Material with the rest 80% to be recycled material so as to not only save huge amount of material cost but also more environmentally-friendly and can save approx. 30-60% energy consumption with the energy-saving system.
Choose Full Shine Plastic Machinery to process any your plastic products.
Full Shine Machinery has 30 years of experience specializing in Automatic Blow Molding Machines, Multi-layer Co-extrusion Blow Molding Machines (2-6 layers bottle), Accumulator-head Blow Molding Machines, One Stage Injection Blow Molding Machines, and PET Stretch Blow Molding Machines. In addition, we have experience with Molds, Die Heads, and Auxiliary Equipment. Please contact us to learn more about our capabilities.
Nowadays literally all humankind use plastic products 24/7 all over the world. It is super easy to get access to all kinds of plastic products. You might have come across bottles that have a shiny layer on the outer side, or different colours on the outer and a different one in the inner. So, what it is? It is a multilayer extrusion product. Well, let me explain to you how what it is exactly.
Multilayer extrusion blow moulding is the same technology as making a hollow container by blowing air into it. It uses more than two extruders to melt and plasticize the same or different plastics in different extruders. And then compounding, extruding and forming multi-layer concentric composite parison in the die. Its basic process principle is the same as the single-layer blow moulding technique. Only the moulding equipment uses several extruders to plasticize different kinds of plastics. Control of the integration and bond quality of plastic layers is the key to the multilayer co-extrusion blow moulding technology.
Multilayer co-extrusion blow moulding is developed to meet the needs in some industries with some special requirements. Such as the airtightness and corrosion resistance in pharmaceutical, food, and industry.
The following content will help you understand this technology better.
Multilayer co-extrusion blows moulding hollow products are produced by extruding several different raw materials into hollow products through a multi-layer die head. To achieve the barrier performance of the container to external substances. Adopt coextrusion blow moulding, compound a variety of polymers together. Forming the multi-layer containers.
The advantages can be summarized as follows:
Improve the performance of the products. Such as strength, stiffness, softness, heat resistance, transparency and size stability. Improve the surface performance of products. No stripe, no speckle, no scratch. More smooth, cleaner.
The development of multilayer co-extrusion blow moulding technology and equipment makes it possible to choose the best material combination plan. And this also realizes the production of ideal performance blow moulding products.
According to the production capacity range and performance requirements, this technique supports 2 to 7 layers of production. The no of layers increases depending upon your combinations of adhesive and barrier layer. When choosing material, the different layers should choose different materials. The inner layer and outer layer, choose all-new material, which is of high quality. Attention here, you should according to your production needs to choose suitable raw material.
Because we’re a water tank blow moulding machine manufacture, we usually produce a water tank by our machine to test it. For the water tank, HDPE is a good choice. We also use it. Most of our customers also choose HDPE. Its performance makes the blow moulding products more durable. And the intermediate layer, you can use waste material.
It provides higher quality blow moulding products under a more broad width and linear velocity.
Fill low-cost material. It can save high-quality resin. Recycling use of raw materials. Save the material cost.
Improve production efficiency.
The products under this technology are durable, more stable, the quality is higher.
Multilayer co-extrusion blow moulding products usually have high chemical resistance (oxidation resistance, light ageing resistance), harmful substance penetration resistance, odour migration resistance, compression resistance, impact resistance, smooth surface, heat resistance, and surface scratch prevention.
Packaging of tomato sauce, rapeseed oil, jam and milk, orange juice, carbonated beverage, beer, etc.
Multilayer co-extruded bottle products have three layers, five layers, and six layers. There are more plastic bottles with six layers of general materials.
This kind of product usually consists of a three-layer combination, four-layer combination, five-layer combination, the six-layer combination of 5-10L barrels, plastic bottles below 1L, etc.
Industrial containers for storing and loading various liquids.
In addition to common water tanks, there are IBC buckets, double-ring buckets, and so on.
Industrial containers usually need to have certain impact resistance, and the characteristics of multi-layer co-extrusion blow moulding technology determine that multi-layer blow moulding products have a certain impact resistance.
Packaging in medicine and cosmetics
Tips:
Multilayer co-extrusion blow moulding technology is certainly advanced. But only when it is applied reasonably can its advantages be brought into full play.
When we use this technology, we should ensure the stability of each performance. Operate it in standard steps.
Based on the stable development of this technology, the application scope of the equipment should be widened as far as possible.
That’s all, the detailed introduction of multilayer co-extrusion blow moulding is ending here.
Multilayer co-extrusion blow molding is the technology of making hollow container by blowing molding.
It uses more than two extruders to melt and plasticize the same or different plastics in different extruders.
And then compounding, extruding and forming multi-layer concentric composite parison in the die.
Its basic process principle is the same as the single-layer blow moulding technique. Only the moulding equipment uses several extruders to plasticize a different kind of plastics.
Control the integration and bond quality of plastics layers is the key to the multilayer co-extrusion blow molding technology.
Multilayer co-extrusion blow molding is developed to meet the needs in some industries with some special requirements.
Such as the airtightness and corrosion resistance in pharmaceutical, food, and industry.
The following content will help you understand this technology better.
Multilayer co-extrusion blow molding hollow products are produced by extruding several different raw materials into hollow products through multi-layer die head.
To achieve the barrier performance of the container to external substances.
Adopt coextrusion blow molding, compound a variety of polymers together. Forming the multi-layer containers.
The advantages can be summarized as follows:
Improve the impermeability
Improve the performance of the products. Such as strength, stiffness, softness, heat resistance, transparency and size stability
Improve the surface performance of products. No stripe, no speckle, no scratch. More smooth, cleaner.
Want more information on chemical jerrycan blow molding machine? Feel free to contact us.
The development of multilayer co-extrusion blow molding technology and equipment makes it possible to choose the best material combination plan.
And this also realizes the production of ideal performance blow molding products.
According to the production capacity range and performance requirements, this technique supports 3-6 layers of production.
When choosing material, the different layers should choose different materials.
The inner layer and outer layer, choose all-new material, which is of high quality.
Attention here, you should according to your production needs to choose suitable raw material.
Because we’re a water tank blow molding machine manufacture, we usually produce a water tank by our machine to test it. For the water tank, HDPE is a good choice. We also use it. Most of our customers also choose HDPE. Its performance makes the blow molding products more durable.
Multilayer blow molding can choose universal extruder and step-less speed regulation of multipurpose dc motor.
The extruder hopper laryngeal is designed for the curve shape. The feed of barrier layer extruder is preheated by temperature control.
Each extruder should be equipped with a torque monitoring device.
The extruders of co-extrusion are operated in parallel and monitored by stages.
The extruders are jointly started. When a certain extruder’s torque drops or feeding interrupts, the whole extruder can stop and act jointly according to the program; the length of parison can be controlled, depending on flow distribution, and can be adjusted automatically and synchronously.
When the melt temperature and torque of each extruder exceed the parallel operation conditions, and when the internal pressure of the bonding layer and barrier layer exceeds the allowable range, the fault display is used to monitor and regulate them.
The die head structure of multilayer co-extrusion is shown in the figure
Multilayer co-extrusion die head is often designed to patchwork type.
Die head housing consists of several flanged exterior die.
The inner die is assembled by several die cores.
The exterior and interior die pellets are processed accurately, and the runner of the die is polished by chromium plating to reduce the flow resistance of the plastic melt.
The whole machine head is heated by a four-stage adjustable power ceramic heater, which cooperates with the quick start of the machine head and has good heat insulation measures.
Ensure that the die head has the best temperature environment.
The whole machine chooses program logic control or computer control.
The velocity distribution in the opening and closing stages of the die and the moving speed of the blowing foam tube can be controlled by a hydraulic proportional valve and numerical position converter.
It can produce 1-6 layers blow molding products, up to 10 layers.
It can not only produce common plastic water tanks but also supply the production of plastic pallet, road barrier, double ring drum, IBC tank, and many other customized products.
Under this technology, the production efficiency has increased 5 times than traditional machine, and the recycling and utilization rate of materials has increased 4 times.
It provides higher quality blow moulding products under the more broad width and linear velocity.
Fill low-cost material. It can save high-quality resin. Recycling use of raw materials. Save the material cost.
Improve production efficiency.
The products under this technology are durable, more stable, the quality is higher.
Multilayer co-extrusion blow molding products usually have high chemical resistance (oxidation resistance, light aging resistance), harmful substance penetration resistance, odor migration resistance, compression resistance, impact resistance, smooth surface, heat resistance, and surface scratch prevention.
Food and Beverage
Packaging of tomato sauce, rapeseed oil, jam and milk, orange juice, carbonated beverage, beer, etc.
Multilayer co-extruded bottle products have three layers, five layers, and six layers. There are more plastic bottles with six layers of general materials.
Chemical Reagents
This kind of products usually consists of three-layer combination, four-layer combination, five-layer combination, the six-layer combination of 5-10L barrels, plastic bottles below 1L, etc.
Industrial Buckets:
Industrial containers for storing and loading various liquids.
In addition to common water tanks, there are IBC buckets, double-ring buckets, and so on.
Industrial containers usually need to have certain impact resistance, and the characteristics of multi-layer co-extrusion blow molding technology determine that multi-layer blow molding products have a certain impact resistance.
Others:
Packaging in medicine and cosmetics
Tips:
Multilayer co-extrusion blow moulding technology is certainly advanced. But only when it is applied reasonably can its advantages be brought into full play.
When we use this technology, we should ensure the stability of each performance. Operate it in standard steps.
On the basis of the stable development of this technology, the application scope of the equipment should be widened as far as possible.
That’s all, the detailed introduction of multilayer co-extrusion blow molding is ending here.
1.Two-layer blow molding machine: Consists of two extrusion units and one die head, capable of producing plastic bottle with two layers of different properties. It is commonly used for manufacturing packaging materials with varying moisture resistance and freshness requirements.
2.Three-layer blow molding machine: Comprises three extrusion units and one die head, allowing the production of bottle with three layers of different characteristics. It is suitable for manufacturing functional packaging bottle, such as materials with thermal insulation, barrier properties, and protective features.
3.Multilayer co-extrusion blow molding machine（Four-layer blow molding machine, Five-layer blow molding machine，six-layer blow molding machine）: Utilizes a single extrusion unit and a special die head structure to extrude multiple different plastic materials and form a multilayer structure. It is ideal for producing bottle with complex structures and multilayer configurations, including bottles with barrier properties or decorative requirements.
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