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Plastic Injection
Molding
As we
start 2010, Part Daddy is near capacity. We are still
interested in quoting injection molding work. Please
email your CAD model.
Thank you
to our existing and new customers who found that cost
effective quality parts can be Made in the USA.
Email your CAD Solid Model:
- Eligible parts are "straight
pull", we presently do not offer "core-pull"
service
- Email your solid model for
quote
- Part size is limited to a
volume of 18 cubic inches
|
Relative Part Size |
Engineering Tooling Fee |
Minimum Total Order |
| two deck of
cards |
No Charge |
$2500 |
| 1.5"T x 2" x
8" |
About $3000 |
$5000 |
| 2"T x 10" x
16" |
About $5000 |
$5000 |
Molding Services We
Offer:
-
Straight-Pull molding:
A straight-pull part ejects straight out of the molded
tool.
This part usually does not have any engineering
cost associated with making the tool if the part is
about the size of two deck of cards any way you
stack them. If your order quantity is large enough,
there usually isn't an engineering fee.

Example of straight-pull plastic injection molded parts.

This gear is a straight-pull
part.
(click photo to enlarge)

Nylon part with brass
inserts pressed in.
If necessary, we can
destructive load test strength. Press-in inserts
are our own design. We machine them.
(click photo to enlarge)
- Tooling:
Part Daddy is just interested in supplying
quality plastic injection molded parts to our
customers. We build & maintain the mold to make
your parts. No maintenance cost to you! Sometimes
there is an engineering expense involved in tooling
manufacture. This usually depends on the size of the
part.
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Molding
Injection Molding
Contents:
Proposal
requirements
are we right for you?
design
for molding
materials
services
guarantee
Part Requirements:
- Part Volume Limit: Right now, the largest
press we use allows a part volume of about 25 cubic inches
(or around 16oz volume).
-
Part Dimensional Limit:
Now offering injection molded part up to 16oz shot
size. That is about a one pound part! Something as
big as a keyboard, or LCD monitor frame.
-
CAD Files:
We prefer Solidworks, SAT, IGES, ProE
-
Print: Include tolerances and specify any critical
dimensions. We'll QC the parts to the print you provide. A solid-modeled part
is manufactured using YOUR drawing file. So make
sure your drawing is correct.
- Critical Surfaces: Specify surfaces or
features that are of any special importance. Specify
where ejector marks are acceptable. The ejector
marks are where the pins push the molded part out of
the mold. You should also keep in mind where the
parting line of your part is.
- Part Design Principles: Design your part
for manufacturability. Review the
designed for
machined molds - Part Daddy's Guidelines
below. Thinking about how to manufacture a part can
save you thousands of $$$. So get your engineers on
to this information. A little planning
goes a long way.
return to top - Injection
Molding
Injection Molding
Contents:
Proposal
requirements
are we right for you?
design
for molding
materials
services
guarantee

Packed with care, these cosmetic parts are ready to
ship!
Is Part Daddy molding
service, right for you? Sure!
Our
injection molding services are an excellent fit for parts with
machined or satin finishes. Parts with 3D contoured
surfaces or complicated surfaces are included in this
offer. We presently run parts from tools made by us. If you
presently buy
machined plastic parts, think
about molding them instead. Your molded part will be a higher quality,
consistent dimensional part versus a machined part. Do
you require 500 to 500,000 parts? Have
us mold them.
Are you importing
your molded parts from overseas? Check us out! Get
your parts domestically without delay. Ship UPS,
freight, or your method. Made in the USA, high quality,
low cost.
Application
Examples: (see photos on this page) Perhaps you need a component for
electronics, electronic enclosures, lids, face plates,
knobs, buttons, circuit board stand-off, or foot.
Perhaps you need a container for packaging, tray for
material handling, or that special nylon roller or lever that's
tough as nails. We mold FDA approved materials
for medical trays, food contact processing parts.
return to top - Injection
Molding
Injection Molding
Contents:
Proposal
requirements
are we right for you?
design
for molding
materials
services
guarantee
Some Guidelines
Design for Machined
Molds:
Save money, design your molded part for easy
manufacturing. Using this information will save you a
lot of time and money. If you can settle for a .033
radius instead of a .012 radius, then you'll save money.
Considering slot widths and feature clearances will save
you money. Properly drafting faces of your part can save
money. Just a couple things we may advise when reviewing
your part.
Customer
testimonial: "The first delivery of parts saved
our customer enough money to pay the annual salary of
one of their employees." "Now that we saved
[money & time] on this part, I'll
be emailing you several other parts soon." -customer
requested confidentiality
- Finish:
Part Daddy parts are great for customers who need
quality parts and a machined
or satin finish. (EDM type bead blast) finishes. Our
machined finishes are nice with very little tool
marks. We typically apply a light bead blast finish
for a smooth opaque appearance. We can lightly
polish close to SPI C-2 to C-3 finish.

- Gate: Gating leaves a
mark on the part. Indicate where you would like the
gate and we'll do our best to accommodate your
request. We usually sub-gate. Sub-gates leave small
marks on the side of the part and require less
handling once your part is molded.
- Draft: We can mold
vertical side walls, but there will be
drag marks on the side of your parts where they
eject from the mold. Adding a
minimum 1/2° (0.5 degree) draft to side walls will
minimize or eliminate side wall scuffing problems.
Ideally, we recommend at least 1° or more.
- Ejection: We'll place
the ejector pins. However, you can suggest preferred
locations.
Ejectors leave a mark and are usually put on the
non-cosmetic side of the part. We also design and
machine stripper plates and sleeve ejectors. We can
also make custom solutions, such as air ejection and
robotic handling.
- Designed for Machining:
Avoid EDM. It's a slow process, requires additional
tooling and expense. Here are some guidelines for
parts. Don't worry if your part falls outside of
these guidelines, we would still like to take a look
at it. We'll be upfront if we can not rapidly
turn-around your project.
- Tolerance:
Specify critical tolerances when providing the CAD model. We pamper your parts...
they're molded in an environmentally controlled
shop. This helps us keep quality under control among
other factors. For an extremely large order, we
would incorporate vision inspection.
return to top - Injection
Molding
Injection Molding
Contents:
Proposal
requirements
are we right for you?
design
for molding
materials
services
guarantee
Thermoplastics We Mold
(and don't mold):
- We mold Nylons, ABS, PP, PE,
PC, Acetal, Delrin, other types. Variations of GF (glass
filled) polymers too.
Injection Molding
Contents:
Proposal
requirements
are we right for you?
design
for molding
materials
services
guarantee
Satisfaction Guaranteed: Parts are
manufactured in a climate controlled environment. We QC
parts in the climate controlled room temperatures. We will replace parts not within specified
tolerance of the blue print supplied with your purchase order.
return to top - Injection
Molding
Injection Molding
Contents:
Proposal
requirements
are we right for you?
design
for molding
materials
services
guarantee

CNC Machining
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Here's where we started, in 1996!
Precision CNC machined parts. We quote machined parts
made of aluminum, brass, hard foam, and plastic. 500 to
50,000 part production.
- Live Tool Lathe:
Turn, cross mill, full Y-axis 2-3/4" inch diameter CNC
lathes capacity. Ideal for parts with cross holes. Bar fed
CNC production up to 1-3/4 diameter bar. Small parts
1/8 bar stock. We can also machine components for solenoid coils and steel plungers.
Some more information
here.

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