Sacmi CCM001, User Manual

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002AZ001A
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2
MACHINE FEATURES
2.1.1.4 Forming unit
(References given in figures 2.1.1.4/A and 2.1.1.4/B)
The hydraulic actuators and dies are located in the forming unit. They are used to form, cool down and remove the pellets
of molten plastic that are sent to them from the insertion drum. The finished product is then placed on the stripper wheel.
The forming drum consists of a support shaft (1) on which the drum body (2) is mounted. Motion is transmitted from the
drive unit to the shaft through a pulley (3) and belt (4).
The upper (5) and lower (6) rotary distributors are found inside the body (2). The upper distributor delivers the cooling
fluid to the upper tools while the lower one feeds the coolant to the lower tools and oil under pressure to the hydraulic
actuators.
The hydraulic actuators (8) are mounted on the lower body of the drum (7). A die (9) (lower) is provided with each of
the actuators. These dies receive the pellets that are then formed and cooled down.
The actuator (8) is hydraulically driven. The various stages of its movement are piloted by a ball valve (10), that is
mounted next to the actuator itself.
A duct (11), for the die’s (9) coolant, passes through the actuator’s rod. The upper dies (or punches) are part of the
cartridge (12), which in turn, is mounted on the upper drum body (13). The relative rod (14), that drives the devices
used for stripping the product is found inside each cartridge. A fork (15), whose task is to act on the stripper, is keyed
to the rod.
The stripper rod (14) is controlled by a fixed cam (17) that acts on a roller (18) secured to the same rod (14).
In addition, the machine is equipped with a number of pneumatic valves (25) so that the product can be removed by
blowing air into the upper dies. These valves send air under pressure to each tool (12).
From the air supply system the compressed air first flows through an accumulator that keeps its pressure constant and
then through a ring that directs it to valves (25). The latter are controlled by a cam. The air then reaches the flow controls
found near the dies.
Two operations can be carried out to remove the product when some particular tools are installed (fig. 2.1.1.4/B). The
die (12) is driven by both a stripper rod (14) and cam (21). The latter acts on a wheel placed in a central position in relation
to the die.
The upper tools are cooled down by the coolant that runs through the duct (19).
Figure 2.1.1.4 - FORMING DRUM
1 Support shaft
2 Drum body
3 Pulley
4 Belt
5 Upper distributor
6 Lower distributor
7 Drum’s lower body
8 Hydraulic actuators
9 Die
10 Actuator control valve
11 Coolant duct (lower dies)
12 Tool cartridge
13 Upper drum body
14 Stripper drive rod
15 Fork
17 Fixed cam
18 Roller
19 Coolant duct (upper dies)
21 Cam
25 Valve