Microdia Newsletter No 41 wires concentricity measuring issues
Microdia newletter No 40 by-pass
4
www.microdia.ch Your expert in extrusion SWISS °microdia °microdia N EWSLETTER N O 40 By-pass saves time and money $$$. microdia by-pass simplicity and life span contributed to its popularity among wire & cable manufacturers all over the world. Installed not only on microdia cross heads, it can easily and efficiently replace less performing competitors products. microdia by-pass module can be attached to any existing cross head, sometimes without need of moving the extruder to match the center line. They are available in three main configuration: Manual. Pneumatic. Hydraulic. An existing manual by-pass can always by motorized later, adding a driving pneumatic or hydraulic cylinder. October 2014 Manual by-pass module with thread coupling. Money saving $$$, less down time. L INE START : Before starting the line, compound remaining inside the barrel must be expelled until clean, smooth and well plasticized material comes out. Without the by-pass, overheated and sometimes degraded compound flows through the head and tooling during extruder bleeding: Particles might remain stuck inside of the head and later get released during production causing lump or spark faults. Compound might flow back inside of the tip (wire guide) and requires time consuming tool cleaning. Color change: Extruder can run at higher speed during color change >>> down time is reduced. Tooling change: Tooling can be changed while extruder is running, sensitive compound will not be affected by an excessive residence time during the operation. Head cleaning: Complete head dismantling and cleaning also possible without stopping extruder.
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Microdia by-pass is the result of numerous trials in the field. Thanks to perfect combination of different steel grades along with high precision machining, they are simple (only two parts) and tight event at high extrusion pressure.
Transcript of Microdia newletter No 40 by-pass
www.microdia.ch Your expert in extrusion
SWISS
°microdia
°microdia
N EWSLETTER N O 40
By-pass saves time and money $$$.
microdia by-pass simplicity and life span contributed to its
popularity among wire & cable manufacturers all over the
world.
Installed not only on microdia cross heads, it can easily and
efficiently replace less performing competitors products.
microdia by-pass module can be attached to any existing cross
head, sometimes without need of moving the extruder to
match the center line.
They are available in three main configuration:
Manual.
Pneumatic.
Hydraulic.
An existing manual by-pass can always by motorized later, adding a driving pneumatic or hydraulic cylinder.
October 2014
Manual by-pass module
with thread coupling.
Money saving $$$, less down time.
L I N E S T A R T : Before starting the line, compound remaining inside the barrel must be expelled until clean,
smooth and well plasticized material comes out.
Without the by-pass, overheated and sometimes degraded compound flows through the head
and tooling during extruder bleeding:
Particles might remain stuck inside of the head and later get released during production
causing lump or spark faults.
Compound might flow back inside of the tip (wire guide) and requires time consuming
tool cleaning.
Color change:
Extruder can run at higher speed during color change >>> down time is reduced.
Tooling change:
Tooling can be changed while extruder is running, sensitive compound will not be
affected by an excessive residence time during the operation.
Head cleaning:
Complete head dismantling and cleaning also possible without stopping extruder.
www.microdia.ch Your expert in extrusion
SWISS
°microdia
°microdia
Newsletter No 40 Pa ge 2
Only two main parts:
microdia by-pass counts only two main parts:
1. By-pass block
2. By-pass shaft.
Nothing else. Thanks to an extremely precise machining,
minimized clearance, special wear surface coating
and selected alloyed steel, microdia by-pass is tight
without need of any kind of seal.
Simplicity
Picture take from microdia by-pass
operating instruction .
(Instruction on hard copy and CD is
sent with every microdia unit.
Easy & fast dismantling
Handling tool:
Like every microdia product, each by-pass is supplied
with a complete set of handling tools.
microdia recommend a weekly cleaning of shaft and
body when processing easily degraded compound.
With stable material like PE for example, by-pass
can however operate several weeks without
dismantling.
Shaft is pushed upward by
means of a special shaft
extractor, after having released the four screws of
the upper holding plate. By-pass with shaft
extractor
www.microdia.ch Your expert in extrusion
SWISS
°microdia
°microdia
Newsletter No 40 Pa ge 3
Motorized by-pass
Pneumatic.
Hydraulic
Motorized by-passes are a must on fully automatic extrusion lines but they are useful too on
standard manual lines, switched on and off via push buttons.
On both types of lines, by-passes are also controlled by the wire break detection circuit which
will automatically turn by-pass in bleed-out position, avoiding compound back flow in the tip
(wire guide) and sudden extruder pressure surge due to the brutal stop of the conductor.
Existing microdia by-passes can always be motorized later on, without major change.
An air cylinder is the simplest way to motorize a by-pass, because
compressed air is available in every cable plant.
Pros:
Compressed air everywhere.
Low compressed air consumption.
Clean, no contamination risk.
Cons:
Limited torque.
Voluminous air cylinder.
Hydraulic motors are preferred where PVC compound are extruded because of the minor deposit of PVC particles around
the shaft tend to block its rotation after a certain number of
operations, or where space available is limited (multi layers
extrusion).
Pros:
High torque.
Reduced volume.
Cons:
Need of a hydraulic pump unit.
Contamination possible in case of oil leak.
Typical application:
PVC extrusion.
Skin-foam-skin extrusion.
Multi extruders cross flow color change.
www.microdia.ch Your expert in extrusion
SWISS
°microdia
°microdia
Newsletter No 40 Pa ge 4
http://www.fukase.co.jp
T.Fukase & Co., Ltd.
Sole agent of microdia in Japan
2-10-10 Makuhari Hongo Hanamigawa-Ku,
Chiba, Japan 262-0033
Tel: +81-43-276-0630 Fax: +81-43-276-0463
Switzerland USA
JAPAN
Head Off ice & factory :
m ic rod ia SA Prés du Lac 69bis 1400 Yverdon les Bains Switzerland Tel: +41 24 447 3500 Fax: +41 24 445 1228 [email protected] www.microdia.ch
P.O.Box 1419
Pawcatuck CT 06379
Alban Adams Director
1-860-495-5788 (office)
1-401-688-6731 (mobile)
skype: alban.adams
microdia USA
Contact in Switzerland
Stephanie Chasseloup
Sales assistant
Microdia Head Office
+ 41 24 4473510
P.R China 上海
microdia Asia Pacific
陈曙欣 +86-13917923939
祖照亮 +86-18616387577
Room A201, Building 3, No. 526,
3rd East Fute Road,
China (Shanghai) Pilot Free Trade Zone
200131 Shanghai, China
中国（上海）自由贸易区富特东三路526号3号楼A201室，
邮编: 200131
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