For Sale - PTP - 3790 - Block Bottom Valve Woven Bag Making Machine

Technical specifications:
Size range
- Sack width, double flat: 350 to 600 mm
- Sack length: 450 to 910 mm
- Bottom width (B > 160 mm only for sacks open on one side): 80 to 160 mm
- Width of bottom applied: 170 to330 mm
- Central bottom distance: 400 to 750 mm
- Cutting length of tubular fabric: 530 to 1090 mm
- Intermittent Feed length: 660 mm

Valve:
- Cutting length: 80 to 200 mm
- Fabric width: 170 to 330 mm
- Bottom patch
- Cutting length: 230 to 480 mm
- Fabric width: 75 to 160 mm

Capacity:
- Production speed: 40 sacks/min

Material Specification:
- Tubular fabric
- Woven from 2.5-5 mm PP tapes
- Fabric weight: 50 to 80 g/m²
- Coating of the outer sides: 15 to 30 g/m²
- Material of coating layer: The formula supplied by seller
- Adhesion of coating: min. 3 N/30mm
- Width tolerance: +/-7 mm
- Weight tolerance (fabric + coating): +/-3 g/m²
- Excess coating Max: 5 mm

Outside diameter of the main fabric roll:
- Max: 1500 mm
- Min:1000 mm

Inside diameter of the core:
- 108 mm (Steel tube)
- 76 mm (Paper tube)

- Max. edge displacement (due to transverse motion unit): 15 mm

Flat fabric for valve/bottom patch:
(2.5-5 mm PP tapes)
- Fabric weight: 50 to 80 g/m²
- Bilateral coating: 15 to 30 g/m²

- Material of coating layer: 15% PE, 85% PP
- Adhesion of coating: min. 2.7 N/cm
- Width tolerance: +/-3 mm
- Weight tolerance (fabric + coating): +/-3 g/m²

Outside diameter of the fabric roll:
- Max 850 mm
- Min 400 mm

- Inside diameter of the core: 76 mm (Paper tube)

Power, water and air consumption:
- Connected load: 100 kva

Power: 400V, 50HZ

- Cooling water temperature: - Air temperature: 16degree - 40degree
- Compressed air consumption (6-7 bars): 500 m³/h

Space required:
- Length: 13 m
- Width: 8.5 m
- Height: 2,3 m
- Weight: 9000kg

Each line consists of:

- Unwinding Station:
Consisting of:
Automatic control for guiding the fabric length with transversely movable
Unwinding stand, tension controller (correction distance < 100 mm)
Roll monitoring system: alarm is given before the fabric roll is empty
Pneumatic operated roll loading device

2 winding shafts with pneumatic expansion chucks for a core diameter of 108mm (Steel tube) or 76 mm (Paper tube)
Continuous traction system;

- Perforation System:
For providing a pin perforation in the tubular fabric to achieve better air permeability. sack. Perforation is effected over the complete surface of the sack.

Cross-Cutting Unit:
- For cutting the fabric to the preset length and consisting of:
- Intermittent traction system with servomotor
- Print mark reading device for printed tubular fabric
- Pneumatically operated knife including brake valves in the end positions

Intermittent Feed Section with Pin transport:
- Is the zone where the fabric length is cut consequently
- The fabric is constantly decelerated and accelerated.
- The variations in speed are compensated by the
Compensator.

The intermittent feed section consists of:
- Intermittent pin transport unit
- Servo-drive with self-referencing function, thus ensuring a precise sack transfer
manually adjustable (depending on the sack dimension) bottom opening station
transfer station to the continuous transport section

- Continuous Feed Section:
Is the zone where the sack is transported at a constant speed and without pins to the different folding devices and welding stations.

The continuous feed section consists of:
- Bottom closing by means of adjusting spindles
- Belt system for the transport of the sacks via an acceleration belt from the
main machine to the stacking unit

Manually Adjustable Bottom Center Distance:
- For sack length adjustment

Valve Unit:
- The valve patch, which has been cut from flat fabric, is applied onto the sack and welded by means of hot air.

The valve unit consists of:
- Unwinding station with belt brake, monitoring system for fabric end and
automatic control for guiding the fabric length
- Pneumatic expansion chuck
- Traction unit with separate servo-drive for the infinitely variable adjustment of
the patch length
- Cutting unit for the valve patches
- Hot air welding device

Bottom Patch Devices:
- The bottom patches, which have been cut from flat fabric, are applied onto the closed sack bottoms and welded by means of hot air.

The bottom patch devices consist of:
- Unwinding station with band brake, monitoring system for fabric end and
automatic control for guiding the fabric length
- Pneumatic expansion chuck
- Traction unit with separate servo-drive for the infinitely variable adjustment of
the patch length during the operation
- Print mark reading device for printed bottom patches
- Cutting unit for the bottom patches, adjustment of the knifes
- Hot air welding device

- Stacking Unit:
Constructed as a conveyor belt with package separation for an individually adjustable sack number per package


Main Drive:
Consisting of:
- Position-controlled servomotors with transport system without pins
- Duplex chain drive
- Control elements
- Drive connections to the other drive units by means of a software coupling

Electrical Installation:
- Central power distribution for drive, heating and control systems
- control cabinet, completely installed and checked when connected to the line
optimized energy distribution and protection of the line components
modular machine structure for add-on and retrofit purposes
highly advanced safety and monitoring equipment with checking system
separate bus system for the drive system and the control level, including a
clearly structured diagnosis system and an integrated software temperature
control
control cabinet cooling by circulating air, for unlimited ambient temperatures

Sizing Parts:
One complete set for all possible sack dimensions, consisting of:
- 2 slide plates per sack dimension for bottom opening, for an opening width of
A = 100 mm or up to the demands of customs.

(For picture, please see next page)