Why Choose Complete Plastics for your new injection molding screw tip assembly?
1.Our Replacement Parts Offer Versatility and Reliability:
We are proud
to support our customers with full certification of all materials that we build
their parts from. We want our customers to be assured of the quality in our parts. We even use
the correct materials for the replacement parts. We understand the purpose of
the part in the machine, so we know how to make a reliable replacement.
Here’s an example of how we help the customer: If you have a Nissei
Molding machine and the OEM recommends CPM9V for your application, there are
many materials that can be used. (As a customer, without Certification you would
have no idea that a CPM9V unit wouldn’t last as long.) With complete Plastics,
we offer full certification of the materials! You can rely on our expertise for
your replacement parts.
2.Our Company History Proves Our Expertise in the Industry:
If you have been in the
plastic molding business, you have seen that many manufacturers of Screw Tips
that claim their units are the best design in the industry. In the 70’s and
80’s, co-polymers and new additives were introduced to solve issues with flame
retardants, material strength, and color. Due to the changes, the old screw tip
designs needed to be changed. One of these, was a general-purpose
screw tip that was 3 pieces and non-free flowing. With the new material coming
on the market, the standard Screw tip would burn the material or would not flow
at all. This is the point where the market was flooded with new designs. We
understand this problem and know how to solve it!
Potential Issues with Injection Molding Screw Tip Assembly Designs:
Screw tip Assembly: Four Piece design
This design came out to help with the wear issues of the glass-filled
material. The point of these were that you sacrifice the front and rear seats, due
to wearing to save the more expensive parts (like the retaining head and ring).
The issues that came afterward, were that they were not free-flowing, and they
had issues with burning, but for certain
applications this is a good design.
Injection Molding Screw Tip Assembly: The Castel or Locking Design
The Locking design was developed for applications that that
required quick and consistent shut off to the injection mold. For consistency, this was a
very good design. It worked well on smaller parts, and was used on Japanese
applications, almost exclusively. The down side of the design was that the
clearance between the barrel wall, and the screw tip ring, had to be enlarged
to not burn or gull the barrel.
With the tip turning with the screw, if you left the same
clearance as the non-locking style (with the ring turning with the screw) it
generated significant heat and would burn. In larger machines, it could lock up
and damage the screw tip or barrel. The clearance (depending on the size of the
machine) would have to be opened up from the standard .0015″ per side to
upwards of .006″ per side. The issue then becomes that some jobs in the plant
can run well with .012″ clearance between the barrel wall and the ring on a new
Screw Tip Assembly: Three Piece Free flow
This Design was an upgrade from the standard three-piece tip
design. The changes were that the ring was opened up for more clearance, as
well as the flutes in the retaining head were deeper, and followed all the way
forward, closer to the tip of the retainer. This was the best of all the
options. This design created great flow for Glass filled material with no
burning, and would reduce heat in the first two zones of the machine, for
Industry Problems Made Way for New Screw Tip Materials!
As designs changed, so did the material of the tips. Most were
made from D2 at that point. Now, there is CPM 9V and Carbide for high ware
applications, and H13 and D2 for general purpose materials, as well as PVC and
low temperature materials. H13 material is such a versatile material, it is
used for 70% of the application in the market.
We offer great customer
service for helping you select a new screw tip assembly! Between
the new designs for Screw Tips and the material upgrades, if you let us know
what your applications are, we can set you up with the design that will fit
your application and give you a standard tip design to help you stop the issue that
you have in production. If all of your machines have the same design tips, you
can profile your jobs easier and the cost of replacement is lower.
The major issues we have in the Screw tips market today is cost
vs. price. The one thing to keep in mind, is that anyone can build you a cheap
tip; China, India, and so on. Remember: The screw tips are the life of your
machine and your production. Buy a good tip that will last and make production
Our quality of parts will reward
you with a better production results and longer lasting materials. We can assist
you with screw tips of any size and machine make. We supply screw tips in all
designs, with all material specs. to give you the longest life.