Injection blow molding
The process of injection blow molding (IBM) is used for the production of hollow glass and plastic objects in large quantities. In the IBM process, the polymer is
injection molded onto a core pin; then the core pin is rotated to a
blow molding station to be inflated and cooled. This is the
least-used of the three blow molding processes, and is typically
used to make small medical and single serve bottles. The process is
divided into three steps: injection, blowing and ejection.[4]
The injection blow molding machine is based on an extruder barrel
and screw assembly which melts the polymer. The molten polymer is fed into a manifold[disambiguation
needed] where it is injected through nozzles into a hollow, heated preform
mold. The preform mold forms the external shape and is clamped around a
mandrel (the core rod) which forms the internal shape of the preform. The
preform consists of a fully formed bottle/jar neck with a thick
tube of polymer attached, which will form the body.
The preform mold opens and the core rod is rotated and clamped into
the hollow, chilled blow mold. The core rod opens and allows
compressed air into the preform, which inflates it to the finished
article shape.
After a cooling period the blow mold opens and the core rod is
rotated to the ejection position. The finished article is stripped
off the core rod and leak-tested prior to packing. The preform and
blow mold can have many cavities, typically three to sixteen
depending on the article size and the required output. There are
three sets of core rods, which allow concurrent preform injection,
blow molding and ejection.
Main Technological parameters
No | Item | Unit | Data | No | Item | Unit | Data |
1 | Dia of screw | Mm | 45 | 13 | Die-heating power | Kw | 1.6 |
2 | Max. the retical capacity | Cm3 | 286 | 14 | Pressure of hydraulic system | Mpa | 1.4 |
3 | Total power for cylinder-heating | Kw | 10 | 15 | Max. working pressure of comp. air | Mpa | 0.8 |
4 | Clamping force of injection mold | Qty | 3 | 16 | Discharge rate of compressed air | M3/min | >0.8m3/min |
5 | Clamping force of injection mold | Kn | 450 | 17 | Consumption of cooling water | M3/h | 3 |
6 | Injection mold Opening stroke | Mm | 70 | 18 | Dimension of machine(L×W×H) | Mm | 4000*1670*2350 |
7 | Opening force if blow mold | kn | 52 | 19 | Machine weight | T | approximately 6.0 |
8 | Opening stroke of blow mold | mm | 120 | 20 | Range of formability products | L | 0.005-0.8 |
9 | Idle time | S | 8 | 21 | Height of formability products | Mm | ≤200mm |
10 | Max. plate size of die(L*W) | Mm | 480*390 | 22 | Dia of formability products | Mm | ≤100mm |
11 | Min. die thickness | Mm | 240 | 23 | Noxxle thrust stroke | Ton/min | 3.1/200 |
12 | Motor power | Kw | 22 | 24 | Cover and area | mm | 4000*5000 |
Cavity number of one mold corresponding to products volume.(for
references) |
| Product volume(ml) | 8 | 15 | 20 | 40 | 60 | 80 | 100 |
| Cavity quantity | 8 | 6 | 6 | 5 | 5 | 4 | 3 |
1.Usage:
The machine adopts injection blow molding technology and
once-molding technology. It is a bottle blower of making hollow
bottles. It can produce high grade bottle whose bottleneck has high
precision.
2.Application:
It is widely used manufacturing package bottles in pharmacy,food,cosmetics,chemical and other trades.
3.Composition:
The machine is composed of injection section, injection-blowing
molding section, rotary lifting section, stripping section,
hydraulic control section, electric control section, blow control
section and others. An air compressor and two mould temperature
controllers must be bought by consumer or are equipped according to
the contract.
4.Packing : Export packing
5.Characteristics:
(1)It adopts a thermal flow system and high-pressure injection
molding
(2)Adopts single-screw stem horizontal injection method
(3Adjust rings can be fixed in mechanical, hydraulic, aircontrol,
electric and others to ensure the technological demands of
different products.
(4)Strong applicability to raw materials
(5)Low-mould protection, proportion pressure, proportion flowing
adjustment and other functions
