MEI S.r.l - info@meisystem.com
Corso Europa Unita, 6 24030 Valbrembo (BG)
ph. +39 035 339 112 fax +39 035 4378007 - P.IVA 02053210163

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Sphera2 Plus-XL

Dowload Brochure

Presentation

Today SPHERA 2 PLUS XL represents the ideal solution for lenses and masks cutting made of plastic material, for anyone needing an excellent degree of finishing combined with high productivity, low maintenance costs, ease of use and reliability.

These appreciated prerogatives make SPHERA 2 PLUS XLthe indispensable machine for any companies involved in the manufacture of both frames and lenses, if they want to keep up with competition in the optical branch.

Thanks to our long-lasting experience in the optical branch and, in general, in the automation field, during the design and development stage of the machine we have carefully analysed the market requirements and particularly those of the major producers.

The result is a lens cutting system that is today adopted by the major producers of spectacles in Italy and throughout the world to their full satisfaction.

Main features

The SPHERA 2 PLUS XLwork centre is best suited to cut and shape sun lenses, masks, and demo lenses with holes and grooves of any kind, and finish the edge both by bevelling and rounding, with a nylor groove or also rimless.

The SPHERA 2 PLUS XLprocesses all types of lens in plastic material: CR39, Poly, Apx, etc.

It can machine spherical lenses with basis from 4 to 16, both decentralized and not, as well as cylindrical, toric and double-surface toric lenses, masks with basis from 4 to 7.

The SPHERA 2 PLUS XLwork centre machines 2 lenses at the same time per cycle , which can be lenses of different shapes, of different curves and of different materials and have different edge finish.

SPHERA 2 PLUS XLoperates in full-automatic mode by picking up the rough lenses from two self-levelling loaders and unloading the finished lenses onto a collecting conveyor belt.

SPHERA 2 PLUS XLfeatures the lowest possible cycle times for its category, an extraordinary cutting quality with all materials and extremely moderate operating costs.

The SPHERA 2 PLUS XLwork centre is equipped with a powerful and intuitive Cad/Cam software for the programming and, when fitted with a series of useful accessories, it immediately gets into the claims of large and small companies in the optical branch.

Technical notes

Performances in masks cutting

· Mask cutting: Form base 4 to base 7 spheric, cylindric and toric

· Max Mask in rotation space 230 mm diameter

· Mask locking system by vacuum system

· Drilling inclination: radial

· Capability of processing: drilling and milling of holes and grooves,

special finishes

· Productivity: high, according to the lens program

· Masks loading: automatic through the chain loading device

· Masks unloading: automatic onto a conveyor

· Type of processable material: any plastic material (CR, polycarbonate...)

With specific accessories is also possible to cut lenses and small masks

· Lens locking system: by interchangeable lens-retainer and base

· Type of processable lenses: cylindrical, spherical, toric 4/20

· Rough lens dimensions: from 60mm Ø to 90mm Ø, tile lenses

· Maximum dim. of finished lens: up to 90 mmØ

· Minimum dim. of finished lens:

- with standard equipment: 26 mm

- with special equipment: 21 mm

· Processable standard lens base: from base 4 to base 12

· Special lens base: until base 16

General technical data

Electrospindle speed: 6000 - 28.000 rpm variable depending on program

· Electrical switchboard: according to CE standards, air-conditioned

· All the components: according to CE standards

· Instruction books: according to CE standards

· security certificate: Signed CE factory certificate

External supplies required by the machine

· Power supply: 400v 3 phases + neutral , 6 kW

· Air supply: 6 bars, minimum capacity 800 l/min

· Chip suction: pipe 200 mm Dia, 2500 m3/hour, 25 m/sec

Loading systems selection

1) Automatic stack loader: allow the machine to work in automatic mode; the blanks are stored in a couple of vertical adjustable stores; it is composed by a vertical elevator, a couple of masks adjustable stores and a couple of adjustable lens stores.

Each loader is adjustable in X and Y direction and when the stores are empty the machine prepare itself to release them to be filled; during the vertical stores filling the machine remains stopped, but extra stores are available like accessory.

2) Automatic chain loader: allow the machine to work in automatic mode; the blanks are loaded in small stack of 1-10 pieces (depending of the blank attitude to be placed in a stack). The chain loader has a loading area outside the machine, then it’s possible to load it without stop the machine;

the chain loader could be adjusted for polycarbonate lens (positive pin), Cr39 lens(negative pin) and masks with different curvature and size. On the loading arm there is a device that allow to adjust the blank loading position, in order to get correct optical axes on decentred lenses.

On request accessories

1) End mill preset: it measures the length of the end mills and facilitates the machining set up. It is indispensable to cancel the idle times for replacing the end mills during the production.

2) Additional lens vertical stores: it’s composed by a couple of extra adjustable vertical store for lenses. It’s suitable only for the vertical loading system item 2.1.

3) Additional masks vertical stores: it’s composed by a couple of extra adjustable vertical store for lenses. It’s suitable only for the vertical loading system item 2.1.

4) Manual drawer: it’s prepared for the manual loading of the kind of blanks that are not loadable with the loading system 2.1 or 2.2. It’s composed by a drawer manually moved back and forward where is possible to fix any kind of special blank centring devices.

5) Tool changer: it allow automatic tool change during the cycle; it’s composed by a couple of independent tool changing groups, with three places each, that moves with pneumatic actuators. Each station is equipped with such kind of device.