MULTI-LAYER-CO-EXTRUSION-BLOW-MOLDING-MACHINE
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DKB-10L MULTI-LAYER CO-EXTRUSION BLOW MOLDING MACHINE

bottle for edible oil, single-double color lubricants, single-double color cosmetics, 3 layer pesticide,
5 layer food. plastic volume in 0.5-12L.plastic material:PE、PP、PVC、PS、PC、
TPU、ABS、PA、EVA etc.

 

Features

 

 

 

 

 

  • HMI Touch Screen, Incorporating with PLC system (Optional Siemens/B&R Control) for easy maintenance.
  • Blowing Unit/ Die Head movement for changing mold easily, as option.
  • Built with safety devices to provide maximum protection for the machine operator.
  • High plasticizing capacity extrusion screw is designed to handle material variations.
  • Plasticizing screw and barrel is precision machined from special nitrogen treated steel.
  • Water cooling technology controls feed zone temperature.
  • Chiller circulated hydraulically controlled blow-pin.
  • When requiring both functions in a single machine, purchase the machine for PVC application and order the additional parts (screw and die head ) for conversion to PE application.

Check this video to see how this machine works:

Application

 

20L Pesticide container

20L pesticide container drum

20L pesticide container drum

 

 

 

 

 

 

 

 

For any pesticide container,  a barrier layer to prevent pesticide seeps out from the container is a must. For barrier layer in the pesticide container, there are two main types of barrier layers, PA and EVOH. Widely used in pesticides, food industry. In the pesticide industry, it is mainly used to block the volatilization of pesticides. In the food industry, it is mainly to block the entry of external oxygen. One out and one in, these are the two most common uses. In addition, due to the high-gloss properties of EVOH, it can also be used in the cosmetic industry similar to the pearlescent layer.

Because EVOH or PA and PE cannot be directly bonded, a layer of glue is needed between EVOH and PE.

In the barrier properties, PE<PA<EVOH. But the anti-drop property of PA is slightly higher than EVOH. The most commonly used barrier layer is EVOH, which has excellent barrier properties and is harmless to the human body through various tests.

Pesticide industry: EVOH is commonly used for barrier layers in the pesticide industry. In the pesticide packaging of emulsifiers, at least three layers of packaging are required. The outer layer can be made of PE, the middle layer is glue, and the innermost layer is EVOH. However, the barrier properties of all barrier layers are reduced when exposed to water. Therefore, in water-solvent pesticide packaging, at least five layers of packaging are required, the first layer is PE material, the second layer is glue, the third layer is EVOH, the fourth layer is glue, and the fifth layer is PE. The role of PE in blocking water is sufficient to block water from EVOH. EVOH blocks the volatilization of pesticides. EVOH accounts for 3%-5% of the total material.

Food industry: The food industry is also commonly used in packaging with barrier layers. For example, ketchup will turn black if the barrier layer is not used for three months, and the barrier layer can be used for up to two years without discoloration. In addition, multi-layer packaging is also commonly used in the canning industry. Canned food requires a good oxygen barrier, otherwise it is easy to spoil the food inside. Although the tinplate packaging will not deteriorate, it is too heavy and opaque, and the bottle is easily deformed when it is dropped. So multi-layer plastic packaging is very common. The most commonly used in the food industry is five or six layers. Because EVOH passes the test and is harmless to the body. But food safety requirements are high, so PE is safer. Therefore, the barrier of food is generally packaged with at least five layers. The first layer is PE material, the second layer is glue, the third layer is EVOH, the fourth layer is glue, and the fifth layer is PE.

 

blow molding extrusion plastic bottles, jerry cans

blow molding extrusion plastic bottles, jerry cans

Features & Application

DKB-10L MULTI-LAYER CO-EXTRUSION BLOW MOLDING MACHINE

DKB-10LD is normal Shuttle Blow Molding machine. Shuttle blow molding machine are used for the Extrusion Blow Molding (EBM) process. Shuttle machines are either single-sided or dual-sided machines, and can be manufactured to produce one- to six-layer containers for cosmetic, pharmaceutical, food, and chemical applications.

The Shuttle Production Process

  1. The shuttle is brought under the flowhead, where a parison of plastic material is being constantly extruded. The mold closes and “shuttles” away from the flowhead
  2. The mold is then brought to the blow pins, which are then forced downward into the molds, helping to “calibrate” the necks while air is forced into the cavity to blow the container. The shuttle motion allows the bottles to be blown and cooled to the side, without interfering with the parisons, which are continually extruding from the flowhead
  3. In a dual-sided shuttle machine, the second shuttle mold is brought under the flowhead while the first set is being blown and cooled, doubling the machine’s output

The Shuttle Mold

blow mold on blow molding machineDKB-10LD

Shuttle machines may extrude single or multiple parisons, and are characterized by the number of parisons and the horizontal spacing between the parisons. For example, a “4×100” shuttle extrudes four parisons, spaced 100 mm between the centers. This would require a platen (for attaching the molds) greater in size than 400 mm, to accommodate the required mold width. The horizontal or angled shuttling distance is thus greater than 400 mm for a 4×100 shuttle machine. In general, shuttle machines up to 2×100 mm spacing are considered small machines; shuttles up to 6×100 mm spacing are considered mid-sized machines; shuttles larger than this are typically referred to as “long-stroke” machines.

 

Typically used for lower volume output, these machines generally have two to four cavities per mold, positioned horizontally next to each other. Key advantages of the shuttle blow molding process includes:

  • Low mold cost for low volume output
  • Capable of producing high-quality “calibrated neck” finish with blow pins
  • In-machine trimming – finished bottles exit the machine
  • Capable of producing handleware bottles
  • Capable of producing multi-layer bottles (up to 6 layers)

Features for this DKB-10LD:

  • Double Station
  • Single/Double/Triple/Q.12 Head
  • Horizontal Operated Clamping System
  • Production Volume:2ml~10L
  • Multi layers: Co-Extrusion 1-6 Layers
  • Multi cavities: 1~12 cavities
  • Specialize for the PE/PP/PETG/PVC/Nylon/Co-Extrusion material
  • Special function: View Stripe
  • Clamping system: Toggle/3 Tie Bar/4 Tie Bar
  • Driven Model: Hybrid servo motor drive system/ High performance hydraulic power saving system/Close loop proportional valve
  • Support Parison controller/Auto Deflashing/Auto Recycling/Auto material feeder/Remote trouble shooting funciton/IML(in mold labeling)

One of three fundamental ways to build CO2 and O2 barrier into PET bottles is to design a multi-layer structure sandwiching PET structural layers around a core layer or layers containing higher-priced barrier materials.

This approach stands to benefit from promising new barrier materials such as nylon-based nanocomposites and “passive-active” barrier systems. The latter are dual-acting formulations of a passive barrier material and an active oxygen scavenger that blocks O2 entry and also absorbs O2 from the head space and contents.

Surface-coating technologies apply a super-thin barrier to one surface of a monolayer PET bottle. Coating equipment is being tailored for specific barrier needs, throughput rates are soaring, and new machine designs are facilitating integration into existing high-speed filling lines.

The “ideal” route to a barrier PET bottle is a monolayer polyester structure. This approach would require blending a barrier resin or O2 scavenger—or both—with PET. Multi-layer or coating equipment would not be needed, and bottle design freedom would remain unfettered. Yet sources concede that few practical “monolayer solutions” are as yet on the horizon, mainly because suitable materials are high-priced.

 

Advantages

  • Clamp sizes / quantity to match all requirements
  • Easily configured for monolayer and multi-layer applications
  • Single or multi parison
  • Efficient electric drive(s) on extrusion system
  • Low profile for ease of operator access
  • Part removal and trimming matched to the application
  • In-mold labeling and view stripe capable
  • Lowest investment cost for high-speed applications
  • Extreme bottle quality consistency

 

Application: DKB-10L multi-layer blow molding machine
Parameters
ITEM UNIT DKB-2.5LD DKB-5LD DKB-8LD DKB-10LD
Screw Diameter mm 65 70 80 80
Screw L/D Ratio L/D 24:1 26:1 28:1 28:1
Extrusion motor KW 22 30 45 45
Oil pressure motor KW 11 15 23 23
Screw rotate speed R.P.M 10-75 10-75 10-70 10-70
Screw heating zone Parts 6 6 10 5
Heating power KW 18 20 30 30
Parison motor option KW 3.75 3.75
Extruding Capacity HDPE kg/h Approx.70-75 Approx.85-90 Approx.110-120 Approx.110-120
Mold Center Distance mm 60/80/90/120/130 80/120/130/150/180/220 80/120/130/150/180/220
platen distance mm 180-450 180-550 180-550 240-700
mold movement stroke mm 380 490 600 700
Length range of mould mm 100-320 150-380 150-420 180-550
Width range of mould mm 100-350 150-450 200-570 200-580
Thickness range of mould mm 150-180 180-250 150-300 200-350
Dry Circle time s 3.7 3.7 5 5
Mold-locked pressure Ton 7 9 15 15
Oil tank Volume L 200 200 300 300
Air Pressure kg/cm2 6-8 6-8 6-8 6-8
Air Volume m3/min 0.6 0.8 0.9-1.2 0.9-1.2
Cooling water pressure mpa 0.3-0.5 0.3-0.5 0.3-0.5 0.3-0.5
Cooling water consumption L/min 50 60 60-80 60-70
Min./Max. diameter of product mm 30-200 40-300 30-400 100-600
Weight of product g 20-150 30-300 30-300 100-500
Volume of product L 0.05-2 0.1-6 0.5-6 5-10
Total power consumption kw 54 65 100 101.75
Average power consumption kw Approx.21-30 Approx.25-38 Approx.50-60 Approx.40-60
Net weight of machine ton 6.5 9 15 16
Gross weight of Machine ton 6.7 9.2 15.5 16.5
Machine dimension (L*W*H) m3 3.8*1.9*2.5 4.1*2.3*2.9 4.5*5.5*2.9 5.1*3.5*3.3

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