Wrapping machines

The design and construction of a folding machine must be suitable for films, for example:

Sealable polypropylene 15 - 40 µm
Sealable polyethylene 25
60 µm
Hard PVC
Sealable paper

It must also be suitable for the product, for example:

for collecting and folding rectangular packaging
Bundle formation in any size via various collection stations
one-time folding
Powder products and granulates in soft packaging require continuous working principles and special levelling systems
Single folding with high output according to the star feeder principle

Petri Maschinen mit W-Funktion

Petri Maschinen mit WR-Funktion

W-230 W-250 W-350 W-500

Design features:

solid construction
longitudinal sealing
Main shaft drive
frequency-controlled three-phase drive
Shear cut knife
film take-off control
Product insertion control
Intermittent product ejection
intermittent front sealing
frameless safety doors made of 15mm Makrolon
SPS control system

Additional equipment:

Tear strip with corner cut
Photoelectric print image control
Marking printing devices
Coding (inkjet / laser)
two film rolls
automatic roll change
leaflet and sample inserter
external control devices
Vibration leveller for granular products
Roller and belt leveller for powdery products
Height scanning and ejection station for checking pack completeness
Processing of heat-sealable paper
Outfeed stack and turning device
Full-surface, double-sided end sealing
Oversized film roll
Servo drives
Mobile machine

Technical specifications

Features:

Infinitely adjustable format range. Optimally shaped, hardened and polished control cams in conjunction with a sound-insulating design result in noise levels below 78db(A) even at maximum output. Good accessibility, easy cleaning. Hardly any maintenance due to encapsulated gears. Consistent installation of permanently lubricated rolling elements for rotary and sliding movements. Split control cams, film take-off, multi-grip grippers, so there are no problems with statically charged films. Full protection through Makrolon doors in accordance with EN 294.

Technical data (deviations possible)
Type designation	W230	W350	W500
Film width	230	350	500
Film length Longer film lengths can be realised on customer request	200	600	600
Max. pack height The maximum pack height can be increased to 150 mm for W350/W500 on customer request	80	120	120
Performance [impacts / min] The maximum pack height can be increased to	160	120	100
Film material	Sealable polypropylene 20 - 30 µm Sealable polyethylene 25 - 60 µm Rigid PVC, sealable paper

Working principles

In-line infeed of non-dusty products - layer stacking.
In-line layer stacker infeed - separation of stacked groups.
In-line infeed - turning to long narrow side - accumulation - separation of packs.
Wrapping sequence.
Einschlagablauf.

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WR200 WR300 WR400

Design features:

solid construction
longitudinal sealing
rotativ arbeitender Folieneinschlagkopf
Main shaft drive
frequency-controlled three-phase drive
Rotationsscherenschnitt-Messer
film take-off control
Product insertion control
kontinuierlicher Produkttransport durch die Faltweichen
kontinuierlich arbeitende Stirnsiegelung
schnelle Formatverstellung
gasdruckfederentlastete Schutztüren aus Makrolon
SPS control system

Additional equipment:

Tear strip with corner cut
Photoelectric print image control
Marking printing devices
Coding (inkjet / laser)
two film rolls
automatic roll change
leaflet and sample inserter
external control devices
Vibration leveller for granular products
Roller and belt leveller for powdery products
Height scanning and ejection station for checking pack completeness
Processing of heat-sealable paper
Outfeed stack and turning device
Full-surface, double-sided end sealing
Oversized film roll
Servo drives
Mobile machine

Technical specifications

Features:

Most mechanical movements are rotary or crank-driven. Where this technology cannot be used, optimally shaped, hardened and polished control cams ensure high performance with a low noise level.
In conjunction with sound-insulating encapsulation, this results in values of less than 78db(A) at high performance.Good accessibility, easy cleaning.
Hardly any maintenance due to encapsulated gears. Consistent installation of permanently lubricated rolling elements for rotary and sliding movements. Split control cams, film take-off, multi-grip grippers, so there are no problems with statically charged films. Full protection through Makrolon doors in accordance with EN 294.

Technical data (deviations possible)
Type designation	WR200	WR300	WR400
Film width	175	250	250
Film length Longer film lengths can be realised on customer request	200	300	400
Max. pack height The maximum pack height can be increased to 150 mm for W350/W500 on customer request	40	50	600
Performance [impacts / min] The maximum pack height can be increased to	265	200	185
Min. Folienabzug [mm]	80	80	80
Film material	siegelfähiges Polypropylen 20 - 30 µm siegelfähiges Polyäthylen 25 - 60 µm Rigid PVC, sealable paper

Working principles

Cellular wheel impact principle.

The product leaves the machine rotated by 180°