presentation mh3.00 1 web-site : - …€¦ · phase 1- : hoods are prepared on the top of the...

Tecniche e attrezzature per l’imballaggio Packaging technologies and systems

Presentation MH3.00 1

Web-site : www.messersi.com - E-mail : [email protected] - ITALY

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STRETCH HOODER MH3

(Typical Image) The MH3 Automatic Stretch Hooder (Patented Pending) is a single unit machine able to wrap and protect the customer’s product using the Stretch-Hooding System. The MH3 Automatic Stretch Hooder works using Stretch Film delivered in tubular rolls with a lateral tear gusset.




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MH3 Standard Layout With Double Rolls.




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It is possible to wrap up to three different product sizes using the same roll or to use the automatic changing function to have up to three different rolls of film used to suit different product size Typical Picture Showing A Double Reel Dispenser.

Picture. 1

An infeed conveyor centralises the pallet and delivers the product to be packed onto the conveyor under the hooding area of the MH3 machine. When the product has been delivered, centred and waiting to be wrapped an electronic sensor monitors the pack position and ensures it is in the correct position. This function ensures no product is overhanging the pallet outside the pre-agreed parameters This is designed to ensure there will be no collision between the hooding arch head and the product. When it is confirmed the product is centred and in the correct position the film is stretched and applied to the product using to a special set of extension fingers which grip, expand and apply the stretch hood.




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The machine generally functions using two main separate sequences. They are instigated each time a new product enters the machine. The separate functions are done to maintain maximum throughput on the machine. Phase 1- : Hoods are prepared on the top of the machine using a system of special rollers to feed the film. The coil unrolls to the required length and to suit the pack to be wrapped The height is automatically read using an external photoelectric reading system mounted external to the machine (Optional). The welding and cut unit ensures that the hood will be welded and subsequently cut to the required length. Once the hood is ready it is transported to the mechanical picking-up unit.




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Phase 2. The hood is transferred from the preparation unit to the hooding area This unit is composed of clamps for gripping the rolled up tubular film. The initial opening of the tubular is made by a rotating movement of the N.2 crossbar fitted with the clamps. It is a synchronized and electronically controlled movement to widen the stretching hood film. Each crossbeam has two sets of double clamps giving a total of four, which keep the four edges of the hood up, open and extended. Starting from the centre of the hood and with an outwards movement, synchronized with the crossbeam opening the machine forms the rectangular shape required be put on the pallet. Now in place, the expanded hood is placed in position over the product using the arch lowering and coning to the coming down and placing the hood over the product and to the bottom of the pallet.




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The main innovation (Patented Pending) of the MH-3 Stretch Hooder machine film is the ability to add a new optional hooding system called “Rotate System”. This system gives customers the ability to pack and hood wrap every product to the bottom of the pallet without the requirement of a pallet lifting device The hood having already been cut, welded and positioned (After being partially opened) on the wrapping unit will wrap thanks to the pre-fitted motorized systems. The hood will be slightly stretched on the four angles. The wrapping units rotates on their pins maintaining the film clamped.

“Rotate System”.01 Typical Scheme At the end of the 180° rotating phase, the hood is kept with the weld upward but the wrapping units will be placed on the top of the hood itself. The hood will be stretch to the maximum and it will start the coming down onto to the pack. The stretch hooding group takes place while controlling the outside of the film using the special wrapping unit. At the final stage of the hooding it is possible to change the angle of the wrapping units in order to easily remove the film and ensure it is placed in the best position to attach to the pallet.




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“Rotate System”.02 indicative scheme

The mechanical vertical lifting movement transmission is achieved using a chain drive system (Belt driven available for high speed operation) and is fitted with a safety fall stop control device. In the unlikely event of a failure of the lifting equipment, the security system fitted to the vertical movement will guarantee to prevent it dropping and causing any damage to the mechanical movement.

Pic. 2 Pic. 3

All the automatic functions are controlled by a Siemens S7 PLC which will operate the




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machine in both manual and automatic modes. The conveyor equipment required for the machine (Optional) is normally designed specifically to suit each application and is not covered by this document The system can be supplied with a pallet lifting system (Optional); which allows film to be attached right to the bottom of the pallet which ensures stability of the product in transit but is not included in this document OPTIONAL :

• Double or triple reels which allow customers to have two or three different or equal pack sizes be wrapped. The selection of the roll to be used will be automatic, based on the information supplied on the product at point of introduction.

MH3 TECHNICAL DATA

Production/hour 40 (*) – 80 packs

Film used Stretchable polyethylene

Film thickness 80-140 micron

External roll diameter max 700 mm (Optional 1000 mm)

Internal roll diameter max 76 mm

Supplied voltage 400 V three-phase – 50 Hz

Power to be installed 5.5 kW

Air pressure 6 bar

Air/cycle consumption 50 NI

Noise ≤ 80 dB(A) according rule ISO 11202

Total weight About 3500 kg




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Data suppied based on the following criteria-

(*)Data refers to the Standard Model with a pack having the following dimensions W=1000mm, L=1200mm, H=1600mm, using stretch thickness film of 110 micron

STANDARD COMPONENTS LIST

ELECTRIC MATERIAL

FUSE CARRIER: MOELLER

SAFETY RELAY: PIZZATO

THERMIC RELAY: MOELLER

AUXILIARY REALAY: OMRON

STATIC REALAY: SIEMENS (AC) / CABUR (DC)

CONTACTOR: MOELLER

INVERTER: CONTROL TECNIQUES

MASTER SWITCH: TELEMECANIQUE

BUTTONS: TELEMECANIQUE

TERMINAL CLUMPS: WAGO

LAMPS: TELEMECANIQUE

PLUGS AND CONNECTOR: WEIDMULLER

CABLE HOLDER CHAIN: BREVETTI STENDALTO

METAL CABLE CANAL: ABB / DKC

TEMPERATURE CONTROLLAER: OMRON

TIMER: CDC

TRASFORMER: BELELLI/TADDEI

OPERATOR PANEL: BEIJER/SIEMENS*

PLC: OMRON/SIEMENS*




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ELECTRIC SENSOR

SAFETY SWITCHES: PIZZATO

MECHANICAL SWITCHES: PIZZATO

PROXIMITY: DATALOGIC

ENCODER: OMRON

PHOTOCELLS: DATALOGIC

SAFETY PHOTOCELLS: DATALOGIC

MECHANICAL MATERIAL

MOTORS: MOTOVARIO

GEAR REDUCER: MGM

ADAPTORS: MOTOVARIO

BEARING: FAG

SUPPORT: SLB

PNEUMATIC COMPONENTS: CAMOZZI

PNEUMATIC CYLINDER: CAMOZZI

ELETTRO AIR VALVES: CAMOZZI

CHAINS: REGINA

LINEAR GUIDE: HIWIN

presentation mh3.00 1 web-site : - …€¦ · phase 1- : hoods are prepared on the top of the...

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