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

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)
 

• Over Molding: Have us quote machined parts and price to injection mold over the machined part.
   

• Threaded Inserts: We machine brass inserts for the size you need. Then press them into the plastic molded part. The molder is the machinist is the engineer. Avoiding unnecessary procedures and avoiding unnecessary steps in manufacturing allows for more efficient throughput and higher quality. We're very good at multiple step projects.

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.
   

• Core-Pull Tooling: Have us quote a molded part with "Core-Pull". The tool may have an engineering fee associated with producing the part. The photo below
  
  Specialty Coil Bobbin
  (click photo to enlarge)

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Part Requirements:

1. Part Volume Limit: Right now, the largest press we use allows a part volume of about 25 cubic inches (or around 16oz volume).

2. 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.

3. CAD Files: We prefer Solidworks, SAT, IGES, ProE

4. 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.

5. 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.
6. 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.

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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.

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Injection Molding Contents:   Proposal    requirements    are we right for you? 

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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.

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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.

• We offer several colors for little or no extra charge if a color we stock can work for your part. We have an electric blue, red, canary yellow, pink, green, mocha brown, off-white putty color, white, and black. We custom mix colors to closely match your requirement. We're not quite pantone, but we're very close. We'll document and save samples so we can match future orders too.
   
• For an additional cost, we will acquire a specific resin for customer jobs. However, all costs are due before we order material. We prefer to use resin we stock. We'll provide material certification documentation, certificate of conformance, or other quality assurance documents as required. Specify these, and other requirements, when requesting a quote.
   
• We do not mold PVC, Silicon, Teflon.
   
• We mold soft thermoplastics like TPE, TPO's. See the picture below.

  
   

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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.

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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.

• CNC Milling - 3 and 4 Axis: 3 Axis machining, engraving, serializing. Typically, we machine parts that are 3 axis. Usually, fixtured to machine the top first, then bottom. Other fixture positions are programmed to cut side holes, slots, tapping, engraving, etc.

  

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