If one were to extend the length of the top clamping plate, say 1" on each
end, and extend the ejector plate the same, and bolt a flat bar to each end
of the "A" plate - extended down to the ejector plate when the mold is
closed........

A) one could eliminate the return pins and bushings

B) w/o return pins, free up space for water lines &/or inserts

C) use round or square interlocks for plate alignment

Why isn't that a good idea?????

"larsen-tools" wrote in
news:4Y41d.259534$sh.89399@fed1read06:

If one were to extend the length of the top clamping plate, say 1" on
each end, and extend the ejector plate the same, and bolt a flat bar
to each end of the "A" plate - extended down to the ejector plate when
the mold is closed........

A) one could eliminate the return pins and bushings

B) w/o return pins, free up space for water lines &/or inserts

C) use round or square interlocks for plate alignment

Why isn't that a good idea?????




Might want to post this question over in alt.machines.cnc, as there are
several molders/mold designers frequent that group.



--
Anthony

You can't 'idiot proof' anything....every time you try, they just make
better idiots.

Remove sp to reply via email

On Mon, 13 Sep 2004 00:37:53 GMT, the renowned Anthony
wrote:

"larsen-tools" wrote in
news:4Y41d.259534$sh.89399@fed1read06:

If one were to extend the length of the top clamping plate, say 1" on
each end, and extend the ejector plate the same, and bolt a flat bar
to each end of the "A" plate - extended down to the ejector plate when
the mold is closed........

A) one could eliminate the return pins and bushings

B) w/o return pins, free up space for water lines &/or inserts

C) use round or square interlocks for plate alignment

Why isn't that a good idea?????




Might want to post this question over in alt.machines.cnc, as there are
several molders/mold designers frequent that group.

And cross-post to comp.cad.solidworks, for the same reason.

Best regards,
Spehro Pefhany
--
"it's the network..." "The Journey is the reward"
Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog Info for designers: http://www.speff.com

"larsen-tools" wrote in message news:4Y41d.259534$sh.89399@fed1read06...
If one were to extend the length of the top clamping plate,

What "top clamping plate" ? Most plastic injection moulding machines
are horizontal.
What's a "clamping plate"? Do you mean the platen?


say 1" on each
end, and extend the ejector plate the same, and bolt a flat bar to each end
of the "A" plate - extended down to the ejector plate when the mold is
closed........

A) one could eliminate the return pins and bushings

B) w/o return pins, free up space for water lines &/or inserts

C) use round or square interlocks for plate alignment

Why isn't that a good idea?????

If it works, it's a good idea (I did something similar).
It may hinder ejection and access if the flat bars are in the way when
the mould is open, they may stop mouldings from falling out unless you
use a robot.
It might increase the length of the cycle if the mould has to open
further to make more rooms for the mouldings to fall out.

M.K.

There are also vertical machines, of which I have worked on. The moving
side of the horizontal machine becomes the top side of the vertical machine.
Vertical machines are a lot easier to work with when you have to do insert
stuff as the bottom half of the mold doesn't move and can have parts put on
it to be molded into the plastic with no fear of the part falling out and
being crushed into the mold as the mold closes.

--
Bob May
Losing weight is easy! If you ever want to lose weight, eat and drink less.
Works every time it is tried!

On Mon, 13 Sep 2004 11:02:02 -0700, the renowned "Bob May"
wrote:

There are also vertical machines, of which I have worked on. The moving
side of the horizontal machine becomes the top side of the vertical machine.
Vertical machines are a lot easier to work with when you have to do insert
stuff as the bottom half of the mold doesn't move and can have parts put on
it to be molded into the plastic with no fear of the part falling out and
being crushed into the mold as the mold closes.

From what I've seen, they also tend to have much lower injection and
clamp pressure (and thus more suited for injecting the plastics used
for molding cables onto connectors and such like).

Best regards,
Spehro Pefhany
--
"it's the network..." "The Journey is the reward"
Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog Info for designers: http://www.speff.com

On Mon, 13 Sep 2004 18:56:52 GMT, Spehro Pefhany
wrote:

On Mon, 13 Sep 2004 11:02:02 -0700, the renowned "Bob May"
wrote:

There are also vertical machines, of which I have worked on. The moving
side of the horizontal machine becomes the top side of the vertical machine.
Vertical machines are a lot easier to work with when you have to do insert
stuff as the bottom half of the mold doesn't move and can have parts put on
it to be molded into the plastic with no fear of the part falling out and
being crushed into the mold as the mold closes.

From what I've seen, they also tend to have much lower injection and
clamp pressure (and thus more suited for injecting the plastics used
for molding cables onto connectors and such like).

Best regards,
Spehro Pefhany


Yeah. And what is going to keep the tool lined up? In order to get
the part out after ejection, the tool will have to open beyond the
proposed "skirts" pl;us enough for drop-out , and as soon as the
edges clear there will be no alignment. Besides, there will be either
extreme wear or extreme lube all over the place. Guide pins have
multiple purposes.

Take care.

Brian Lawson,
Bothwell, Ontario.