41-3000 Screen Printing Unit
A NEW Bench Top Screen Printing Unit which is ideal for circuit
board and non circuit board applications. For circuit boards it can be used
to screen print component idents and solder masks with either conventional
silk screen stencils or photo-imagable inks. The height adjustment and registration
aids also make it ideal for conventional screen printing on a whole host
of materials including front panels and nameplates etc.
The Screen Printer allows different screen sizes from 230mm wide to a maximum
external frame size of 508mm x 660mm (20" x 26") to be accommodated. Frames
are held by a unique clamp which can be adjusted for frame thicknesses from
46mm to 20mm.
This new screen printer has many unique design features. For instance
the fitted Silk Screen Frame pivots in a polymer hinge block which eliminates
all unwanted "play" to allow accurate stable screen printing. Stability
during printing is further enhanced by height adjustable carriage having
a four point single element clamp device mounted on two rigid columns. This
height carriage allows the screen to be raised to allow the printing of
materials to 75mm thick.
The actual printing bed or Base Board sits on a fine adjustment mechanism
to aid registration which allows a 0 - 15mm movement in both the X and Y
directions. This stable 19mm solvent resistant Base Board can be removed
for easy cleaning or replaced using the four threaded fittings with a customers
own base board or printing jig.
For long term durability the complete unit is manufactured in a fabricated
welded heavy steel construction with a durable powder coat finish.
Approx dimensions: 670mm x 655mm x 70mm
Approx weight: 23kg
Vacuum
screen printing units ideal for screen printing component ident and solder masks
onto printed circuit boards, as well as printing front panels, nameplates etc.
The two sizes are available to handle, nominally, A2 and A1 paper sizes on the
vacuum area. The maximum outside frame dimensions which can be mounted are larger
than the vacuum area to allow for the frame thickness and surplus mesh surrounding
the working area. The working surfaces are solvent resistant. Different screen
sizes can be accommo-dated by the sliding screen mounting channels. Vacuum is
provided by a Whisper Vacuum unit which is permanently mounted on the lower
shelf on all machines supplied with a floor stand. A sliding plate isolates
the vacuum from the bed when the frame is raised to aid substrate removal.
The screen frame is of substantial box section construction, epoxy powder coated and fitted with bronze brushed, hardened pivots. To accommodate differing thickness' substrates and adjust 'snap' the screen frame pivots and front stops provide a full 50mm (2") of vertical adjustment. An adjustable height stop limits lift and a counter balance weight can be adjusted to achieve precise balance for the majority of frame types. Both the A1 and A2 units are supplied fully assembled fitted to a stand with the Whisper Vacuum unit permanently fixed to the lower shelf.
| Specification-Screen Printing units | ||
| A2 | A1 | |
| Vacuum bed area (mm) | 420 x 594 | 595 x 840 |
| Vacuum bed area (in) | 17 x 23 | 23 x 33 |
| Max outside screen size (mm) | 780 x 660 | 1040 x 725 |
| Max outside screen size (in) | 31 x 26 | 41 x 29 |
| W x D x H (mm) | 840 x 1070 x 900 | 1092 x 1200 x 900 |
| W x D x H (in) | 33 x 42 x 36 | 43 x 47 x 36 |
| Weight (inc. Whisper Vac. Unit) | 51kg (112lb) | 60kg (132lb) |
| Voltage | 220/240 | 220/240 |
| Watts/Hz | 456/50-60 | 456/50-60 |
Optional Extras
Fine Register (Factory Fitted Option for screen printers)
The top perforated vacuum table is floating so that, once the substrate
is located, the register can be easily adjusted by manually sliding or partly
rotating the whole top bed assembly. This is particularly useful for the printing
of PCBs. The limit of movement in the X and Y axis is approximately 50mm (2")
and two locking handles secure the bed in the selected location.
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Five Star Photostencil Film
| Five Star is an indirect stencil film which combines
high resolution with a tough and robust stencil, requiring a minimum of
spotting out prior to printing. The film is quick and easy to process. Firstly
it is exposed to UV light in contact with an artwork. It is then developed
by immersion in Photostencil Film Developer, rinsed in warm water and applied
wet to the screen mesh. New synthetic meshes should be abraded with Seriprep
101. Again all meshes should be degreased with Universal Mesh Prep prior
to application of Five Star. Non stock screen printing consumables are subject to £15 order charge to cover costs implemented by our supplier. |
Five Star Photostencil Film Developer
| For development of Five Star Photostencil Film.
The Developer is supplied in powder form and mixed with water to form a
working solution. Available in 100 gram or 1.5Kg pack sizes. Non stock screen printing consumables are subject to £15 order charge to cover costs implemented by our supplier. |
Polyscreen Ink
Polyscreen
inks are an ideal medium for printing component legend onto printed circuit
boards, as well as for printing front panels, nameplates, schematics etc. The
inks combine outstanding resistance to many chemicals and solvents with excellent
adhesion to difficult surfaces. They also offer exceptional resistance to heat
(including soldering).
Polyscreen inks are supplied in two parts (base and catalyst), packed separately.
Catalyst is added to the base component in the ratio of 5 parts base to 1 part
catalyst. The ink may be thinned using Polyscreen Thinner & Cleaner (air
drying time 1-2 hours) or, Retarder which has the effect of slowing down the
drying process (2-5 hours) to increase screen stability. Note that full chemical
resistance and adhesion will not be achieved until about 4 days after printing.
The drying time can be reduced to 5-8 minutes if the inks are dried using a
convection oven operating at 150°C. Equipment can be cleaned down after printing
using Thinner/Cleaner or Universal Screen Wash.
Non stock screen printing consumables are subject to £15 order charge to cover costs implemented by our supplier.
520 Solder Resist Ink
| A new advanced two-part screen printable solder resist with
outstanding heat, chemical and solvent resistance. It possesses excellent
adhesion to both copper and tin/lead tracks and has the highest possible
electrical resistance properties. The base ink is mixed with the 525 catalyst
which must be ordered separately. If required it can also be thinned
with the OA Thinners. Note that the ink must be stove dried at 120-180°C in either a convection oven or an infra-red dryer to achieve complete curing. Non stock screen printing consumables are subject to £15 order charge to cover costs implemented by our supplier. |
Screen Printable Etch Resist Inks
|
This high definition screen ink is specially formulated for use in the production of printed circuit boards. The ink resists common acid etching solutions such as ferric chloride and persulphate etchants and has good adhesion to all types of copper clad laminate. The resist can be removed in a dilute aqueous solution of Sodium Hydroxide. Prints will air dry by solvent evaporation overnight or a convection
stoving oven can be used. Infra-red conveyorised dryers may also be used.
The inks can be thinned with the OA Thinner. |
Photo-imageable Soldermasks / Idents
These photo-imageable inks are 'blanket' screened onto the PCB before curing in an oven and then exposing with an art-work to UV and processing in normal dry film laminate developer.
Click here to see an Adobe Acrobat pdf document showing full screen printing instructions.
If you do not have Adobe Acrobat Reader installed then you can
download it for free.
5600 - Two Part Solder Mask / Ident Ink
A two part preparation. Hardener is supplied with the pack and the appropriate
amount needs to be mixed with the ink prior to use. The shelf life of the prepared
ink will then only be 24 hours. Five colours available making it suitable as
an ident ink and soldermask.
Non stock screen printing consumables are subject to £15 order charge to cover costs implemented by our supplier.
Seristrip Stencil Remover
| For rapid removal of all Stencil films, Seristrip can be
used on all types of nylon, polyester and metal screens. It is supplied
in powder form in 100g sachets and is mixed with either 10 or 5 litres of
water to obtain either 1% or 2% strength solution. Any ink residues on the
screen should be removed with Serisolve prior to application of Seristrip
Stencil Remover. Non stock screen printing consumables are subject to £15 order charge to cover costs implemented by our supplier. |
Gelatine Stencil Remover
| Gelatine Stencil Remover has been formulated for the rapid
and effective removal of Five Star and other gelatine based indirect photostencils.
It is a pale yellow liquid containing a proportion of solvents formulated
to remove any traces of ink which may remain in the screen. Gelatine Stencil
Remover can be used on all types of nylon, polyester and metal screens. Non stock screen printing consumables are subject to £15 order charge to cover costs implemented by our supplier. |
Blue Screen Filler
| Blue Screen Filler is a water based, flexible filler used for masking screens or for spotting and retouching stencils, films and emulsions. It's high elasticity and solvent resistance make it suitable for long print runs. |
Universal Mesh Prep
| Mesh preparation is an essential part of screen stencilproduction. A little
time spent with the correct preparation chemical improves stencil adhesion,
solvent resistance and stencil life, preventing costly stencil breakdown
on the screen. Universal Mesh Prep is a revolutionary new degreaser and
adhesion promoter for all types of stencil. It can be used with both synthetic
and stainless steel meshes and is highly recommended for use with indirect
stencil films (Novastar, Five Star). Non stock screen printing consumables are subject to £15 order charge to cover costs implemented by our supplier. |
Seripaste Cleaning Paste
| Seripaste is an excellent alkaline degreasing agent for use
with Novastar Photostencil Film and used in conjunction with Serisolve,
it will also remove any stubborn ink or stencil residues from a used screen. Non stock screen printing consumables are subject to £15 order charge to cover costs implemented by our supplier. |
Seriprep 101
| A proprietary abrasive paste used for roughing the surface
of new synthetic mesh to promote good stencil adhesion. Recommended for
all stencil systems, but particularly effective when indirect or capillary
stencils are to be used. Non stock screen printing consumables are subject to £15 order charge to cover costs implemented by our supplier. |
Serisolve Screen Cleaner
| A multipurpose cleaner used for removal of ink residues from
stencils before the application of stencil removers. Used in conjunction
with Seripaste, Serisolve will also remove ink stains, stencil haze and
ghost images, provided these are not due to thread damage by abrasion. Non stock screen printing consumables are subject to £15 order charge to cover costs implemented by our supplier. |
Universal Screen Wash
| A low cost general purpose cleaner used for cleaning inks
from screens after printing and for cleaning down equipment. Note that Universal
Screen Wash is not suitable for the removal of hardened inks. Non stock screen printing consumables are subject to £15 order charge to cover costs implemented by our supplier. |
Actisol Screen Spray
| Actisol is a powerful solvent designed to reactivate inks
after short breaks in printing runs or whenever dried films of ink clog
the screen. It is suitable for use with all types of photo-stencil and solvent
based inks. Non stock screen printing consumables are subject to £15 order charge to cover costs implemented by our supplier. |
Serifix Screen Adhesive
| Serifix Screen Mounting Adhesive has been formulated to produce
a strong, permanent bond between wood, steel or aluminium screen frames
and polyester, nylon or metal screen fabrics. It is extremely easy and economical
to use. Besides a long pot life, it has a fast cut-out time permitting a
more effective utilisation of stretching equipment. Serifix is composed of two components, base and catalyst, packed separately. Non stock screen printing consumables are subject to £15 order charge to cover costs implemented by our supplier. |
Polyester Screen Mesh
| Monofilament polyester fabrics are considered the best all
round material for screen printing. The yarn used in this mesh is selected
by sophisticated electronic equipment to ensure uniformity of diameter and
therefore resilience. It is woven on numerically controlled shuttleless
looms which guarantee micromesh regularity in every mesh aperture. Description
below indicates strands per inch and price is per metre. Non stock screen printing consumables are subject to £15 order charge to cover costs implemented by our supplier. |
Palette Knife
| Used for mixing ink, applying ink to and removing ink from screens. The
flexible stainless steel blade, with integral rosewood handle, is rounded
to avoid damage to screens. Non stock screen printing consumables are subject to £15 order charge to cover costs implemented by our supplier. |
Ink Mixing Cups
| Disposable paper cups for mixing inks and solvents. Supplied
in packs of 80 cups. Non stock screen printing consumables are subject to £15 order charge to cover costs implemented by our supplier. |
Squeegee
| Aluminium handles with 'Everlast' polyurethane blades which
offer excellent abrasion and solvent resistance. Everlast blades are precision
cut and hold their edge far longer than natural rubber. Non stock screen printing consumables are subject to £15 order charge to cover costs implemented by our supplier. |
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Aluminium Silk ScreensMega can offer high quality aluminium silk screens to fit a whole host of machines. Each frame has the silk screen mesh applied. Mesh is measured as threads per centimetre, 77 being suitable for the printing of solder masks and 120 for idents and front panel work. Some popular sizes are listed below. All dimensions below are for the outside of the frame. The frames are 38mm wide, the printable area is normally 25mm in on the mesh, ie. 63mm from the outside frame dimension. Alternative size screens and mesh sizes are available upon request. |
