8/13/2019 Managing mill maintenance: Getting your dies and rolls
re-worked locally to global standards
2/4
O
&J Denmark had the idea to
re-work dies and rolls over three
decades ago with an intention
to assist the market demand to grind and
re-countersink worn dies into as-new
dies at a time when dies were very
expensive.
The machines used for this work could
not be bought at the time so we undertook
the challenge to design, develope and manu-
facture such equipment ourselves.
Since then many others and some
from different perspectives have come up.
However, O&J has been at the very fore-
front of this industry and still is.
Clients of interest include: Feedmills - for livestock such as
pigs,
poultry and cattle, shrimp feed
Bio/wood mills including palm fibre mills
Waste mills
Others
The benefits from die- and roll-
refurbishment include:
Increases life time of pelleting
equipment
Increase throughput
Significant reduces power usage
Securing higher pellet quality
A feedmill is only as strong as its weakest
link. Each machine has to work as its best.
Investing time and money in feed for-
mulation can be quickly written off if the
pelleting machinery used isnt up to scratch.
Installation and usageFrom the start, machines need to be
installed properly with particular attention
being paid to positioning of the roll assembly
correctly against the die production surface.
Failing to fit machines properly can result in
non-uniform wear in the ring die and non-
uniform pellets.
Die- and roll-refurbishmentO&J Denmark has been able to
establish
a strong brand in the marketplace, servicing
clients over very long distances.
Thanks to great trust from all our clients
we can offer a full re-working set up includ-
ing logistic solutions.
The mills book all shipments directly to
our freight forwarding company operating
in their region, bringing dies and rolls to ourre-working center
in Esbjerg, Denmark and
returning with the same afterwards.
Simple but highly effective mills pay
no waste time!, 1 click and the goods are
booked and automatically returned again
when the re-work is complete.
In other regions throughout the g-lobe
this may be different due to existing infra-
structure, labour cost etc.
At the re-working center dies and rolls
are checked on arrival, their actual worn
condition, any damage, etc, with assessment
of how re-working would be or not be
profitable to the client.
It is a partnership. If a die is wrongly worn
a contact shall follow from here giving a note
to the client helping him back on track again.
For example, a good client is a mill
running controlled production systems and
therefore will have a controlled degradation
of wear parts. It is worth remembering that
a full refurbishment and cost will depend on
the work required.
Deciding when to ship a die for re-work-
ing is always a balance. Ultimately it comes
down to a choice between controlled main-
tenance versus damaged based maintenance.
A full refurbishment includes cleaning
the die and checking for cracks by using the
O&J HPJC21 High-Press Blowout System by
means of water only and without chemi-
cals. The advantage of using this method is
that the water is strong enough, blowing out
with 1.250BAR/aprox 17,000PSI, to dislodge
stubborn material without harming the press
channels.
Next, comes grinding the die productionsurface, skimming level
and machining using
the O&J DG1700-1 grinding machine specifi-
cally designed for dies and rolls.
Finally, having it re-counter sunk again
by using the O&J CSV14-3 counter sinking
machine for ring dies.
Differences between regionsIn the northern states of Europe
and
Scandinavia, mills generally carry out re-
working to both ring dies and rolls.
Ring dies get re-grounded, re-counter
sunk and cleaned up - schematically dies
get re-worked two or three times a
lifetime, depending to production and die
condition.
Rolls are normally ground the first time
and then given a new roll shell the next
time. Also, items such as axles, bearings,
cover plates and seal collars are cleaned up
Getting your dies and rollsre-worked locally to
globalstandards
by Leif Wolf, Director, O&J Hojtryk AS, Denmark
MILL MAINTAINANCE
8/13/2019 Managing mill maintenance: Getting your dies and rolls
re-worked locally to global standards
3/4
and controlled before re-assembling which
includes a new roll shell.
In other regions throughout the globe,
this may be different due to existing infra-structure, labour
cost, etc.
However, we register from those other
regions an ever growing interest using our
techniques and machines to set up service
centers for re-working. We invest great inter-
est in being at their service working together
facing a common future and possibility.
A fine example is that a year ago we
fulfilled delivery of technical equipment
to the Phi lippines for a local serv ice
centre in Cebu, which is now giving such
re-working possibilities to local mills in
that region. Even though there have been
a few obstacles to overcome, the regionshows great interest in
the local set-up
having their dies and rolls re-worked
there and general ly fol lowing the same
ideas as we operate here.
Apart from Europe, O&J machines are
in operation in India, Thailand, Singapore,
Korea, China, USA and Canada and theres
more to come O&J is creating a future
together with dedicated clients throughout
the globe.
MOREINFORMATION:
O&J Hjtryk A/STel: +45 75 14 22 55
Fax: +45 82 28 91 41
Email: [email protected]
Website: www.oj-hojtryk.dk
35 | January - February 2014 GRAIN&FEED MILLING
TECHNOLOGY
www.oj-hojtryk.dk
Die and roll re-working machines
O&J Hjtryk A/S
rnevej 1, DK-6705
Esbjerg
CVR.: 73 66 86 11
Phone: +45 75 14 22 55
Fax: +45 82 28 91 41
mail: [email protected]
Empower your employees with tools and
problem-solving skills at IAOMs Fundamentals
of Milling I and II courses, offered at Ocrims
International School of Milling Technology in
Cremona, Italy.
Fundamentals of Milling I: March 17-21
Fundamentals of Milling II: March 24-28
Technical training courses that combine lectures and
discussionswith hands-on laboratory and pilot-scale milling
exercises.
Experience this unique learning environment where classroom,
lab, manufacturing plant, and pilot mill all come together.
International Association of Operative Millers10100 W. 87th
Street, Suite 306Overland Park, KS 66212 USAT: +1 913-338-3377 | F:
+1 913-338-3553E: [email protected]
For more information, visit: www.iaom.info/education
M
http://www.oj-hojtryk.dk/http://www.oj-hojtryk.dk/http://www.oj-hojtryk.dk/http://www.oj-hojtryk.dk/http://www.oj-hojtryk.dk/http://www.oj-hojtryk.dk/http://www.oj-hojtryk.dk/http://www.oj-hojtryk.dk/http://www.oj-hojtryk.dk/http://www.iaom.info/http://www.iaom.info/http://www.iaom.info/http://www.iaom.info/http://www.iaom.info/http://www.iaom.info/http://www.iaom.info/http://www.iaom.info/http://www.iaom.info/http://www.iaom.info/http://www.iaom.info/http://www.iaom.info/http://www.iaom.info/http://www.iaom.info/http://www.iaom.info/http://www.iaom.info/http://www.iaom.info/http://www.iaom.info/http://www.iaom.info/http://www.oj-hojtryk.dk/
8/13/2019 Managing mill maintenance: Getting your dies and rolls
re-worked locally to global standards
4/4
www.gfmt.co.uk
LINKS See the full issue
Visit the GFMT website
Contact the GFMT Team
Subscribe to GFMT
A subscription magazine for the global flour & feed milling
industries - first published in 1891INCORPORATING PORTS,
DISTRIBUTION AND FORMULATION
In this issue:
NIR:Production control in
rapeseed processing
using NIR technology
Keep runningcosts downoperating en-masse
chain conveyors
Getting yourdies and rollsre-workedlocally to
globalstandards
January-February2014
Having no choiceis not reasonableThe quest for a healthier
snack
Silos special:Bulk storage
challenges
Design of anefficient intakepit dedustingsystemthe
state-of-the-art in
technology
first published in 1891
This digital Re-print is part of the January | February 2014
edition of Grain & Feed
Milling Technology magazine.
Content from the magazine is available to view free-of-charge,
both as a full
online magazine on our website, and as an archive of individual
features on
the docstoc website.
Please click here to view our other publications on
www.docstoc.com.
To purchase a paper copy of the magazine, or to subscribe to the
paper edi-
tion please contact our Circulation and Subscriptions Manager on
the link
adove.
INFORMATION FOR ADVERTISERS - CLICK HERE
Article reprints
All Grain & Feed Milling Tecchnology feature articles can be
re-printed as a 4 or 8 page booklets (thesehave been used as point
of sale materials, promotional materials for shows and exhibitions
etc).
If you are interested in getting this articlere-printed please
contact the GFMT team for moreinforma-tion on - Tel: +44 1242
267707 - Email:[email protected] visit
www.gfmt.co.uk/reprints
http://www.gfmt.co.uk/http://www.gfmt.co.uk/archive.phphttp://www.gfmt.co.uk/http://www.gfmt.co.uk/contact.phphttp://www.gfmt.co.uk/subscriptions.phphttp://www.docstoc.com/profile/Perendalehttp://www.gfmt.co.uk/advertising.phpmailto:[email protected]://www.gfmt.co.uk/reprintsmailto:[email protected]://www.gfmt.co.uk/reprintshttp://www.gfmt.co.uk/reprintsmailto:[email protected]://www.gfmt.co.uk/advertising.phphttp://www.docstoc.com/profile/Perendalehttp://www.gfmt.co.uk/subscriptions.phphttp://www.gfmt.co.uk/contact.phphttp://www.gfmt.co.uk/http://www.gfmt.co.uk/archive.phphttp://www.gfmt.co.uk/
![[PPT]SOLID STATE WELDING PROCESS - Mechanical ... · Web viewSolid-State Welding Process Cold Welding Pressure is applied to the workpieces through dies or rolls Preferably both work](https://img.dokumen.tips/doc/110x75/5af43a627f8b9a5b1e8c3c03/pptsolid-state-welding-process-mechanical-viewsolid-state-welding-process.jpg)
![[체인지온@비트윈] Think locally, Act locally! - 양석원](https://img.dokumen.tips/doc/110x75/548110abb4af9fa0158b5eb3/-think-locally-act-locally-.jpg)
