CAP DP Series
From 24 to 48 cavities
Dual pumps allow ejection-on-the-fly (ejection during mould opening), injection during lockup, dual-pump injection and dual-pump charging
Fixed displacement pump version for cycle time below 5 s
Servomotor based version for cycle time at 8 s
Dual-Pump
The CAP DP series uses dual-pump technology to reduce cycle time. It is based on semi-closed loop hydraulics and fixed displacement pump technology to improve precision and speed of response.
The dual pumps allow parallel motions: eject-on-the-fly, injection starts at lockup, dual-pump charging and dual-pump injection.
Eject-on-the-fly ejects the caps during mould opening. It effectively hides the ejection time in the mould opening time.
Lockup is the final stage of the clamping process in which clamping force is built up. Injection is started early to hide the lockup time within injection time.
Once the mould is locked up, both pumps are available for charging or for injection. Charging time and injection time are reduced.
Proportional flow valve is used in the clamping unit to provide braking in mould opening and closing. Mould motion is fast and smooth.
The CAP DP can make 29/25 caps in 4 s cycle time. In 2020, 32-cavity and 48-cavity 29/25 cap moulds are popular.
1.3 g 29/25 caps produced at 4 s cycle time
CAP32 DP with a 32-cavity mould
We recommend the pilfer proof rings of the caps cut by a slitting machine in a subsequent process. This way, the cap mould has no sliders and is more reliable.
A conveyor takes caps from a CAP32 DP into a slitting machine. After slitting, another conveyor takes the slit caps into a carton.
The CAP DP-S uses servomotor drives to save on energy. It is suitable for making utensils at 8 s cycle time but not shorter which would have overloaded the drives.
CAP48 DP-S is driven by two servomotors one of which is outside the machine frame
The following table is a selection guide. The various series have different cycle times, energy-saving levels and applications. X means not applicable.
The CAP series is to make thicker caps with cycle time more than 10 s. It is also suited to making utensils.
The CAP DP-S is suited to making utensils at a shorter cycle time like 8 s.
The CAP DP is suited to mass produce thin water bottle caps at a cycle time as low as 4 s.
|
Series |
CAP |
CAP DP |
CAP DP-S |
|
Number of pumps |
1 |
2 |
|
|
Cycle time |
>= 10 s |
4 – 8 s |
8 – 10 s |
|
Drive technology |
Semi-closed loop hydraulics + fixed displacement pump |
Semi-closed loop hydraulics + fixed displacement pump |
X |
|
Energy-saving option |
Variable displacement pump |
X |
X |
|
Most energy-saving option |
Servomotor drive |
X |
Servomotor drives |
|
Applications |
Sports caps, |
Mass produced water bottle caps |
Utensils, |
Cycle time and energy saving and applications selection guide
Videos
CAP32 DP 生产 1.3 g 瓶盖，CAP32 DP making 1.3 g caps
5加仑瓶盖装垫片及阀门，Liner and valve insertion into 5-gallon caps
32 腔捷飞特瓶盖模具，32-cavity Gefit cap mould
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