sample injection molding part

Inspections for Injection Molded Parts

Certifications

ISO 9001:2015 | ITAR Registered

Quality Control process for Injection Molding

Injection Molding Inspection Reports

As part of the Protolabs standard, we measure up to four plane-to-plane and outside diameter dimensions based on your CAD model (X, Y, Z) to quoted tolerances. We automatically define these quality control checks and perform the measurements on a sampling of parts. 

In addition, we provide a wide range of other quality documentation. Compare the benefits of each inspection report to see which is best suited for your project needs. 


Critical To Quality (CTQ)


Benefits Provides a dimensional first article inspection of critical features (customer selects features defined through an Inspection Statement of Work)
Measurements Selected features per Inspection Statement of Work. May include plane-to-plane, hole-to-hole, ID/OD, or radii measurements as critical features
Service Provided By Protolabs
Additional Features Formatted report with bubbled part image and result summary chart
Eligibility On-demand manufacturing, injection molding orders. Can be added to any other order (excludes: Thermoplastic elastomers (TPU, TPV, TPO, etc.) and liquid silicone rubber (LSR))
Additional Lead Time None
Price Default of 3-piece up to 5 feature partial FAI provided at no additional charge on new unlimited mold orders. For additional part quantities, features, or to add to repeat orders, partial FAI can be modified a la carte. (Starting at $500)
Sample Plan After establishing the molding process, a partial FAI is done using samples of the first parts off the tool
Additional Information Available to select in "inspections" during checkout. Upload a 2D drawing with critical features identified. In addition, define part and feature quantities needed. Contact your account representative with questions

 

*Excludes: Thermoplastic elastomers (TPU, TPV, TPO, etc.) and Liquid Silicone Rubber (LSR). 

Download Sample CTQ Partial FAI

Benefits Provides a dimensional capability study of critical features (customer selects features defined through an Inspection Statement of Work)
Measurements Selected features per Inspection Statement of Work. May include plane-to-plane, hole-to-hole, ID/OD, or radii measurements as critical features
Service Provided By Protolabs
Additional Features Formatted report with bubbled part image and result summary chart
Eligibility On-demand manufacturing, injection molding orders. Can be added to any other order (excludes: Thermoplastic elastomers (TPU, TPV, TPO, etc.) and liquid silicone rubber (LSR))
Additional Lead Time None
Price Default of 30-piece up to 5 feature Capability Study provided at no additional charge on new unlimited mold orders. For additional part quantities, features, or to add a repeat order, Capability Study can be modified a la carte. (Starting at $1,500)
Sample Plan After establishing the molding process, the capability report will be based on customer-defined quantity of parts taken from a set of evenly distributed samples while the order is running (30-part minimum)
Additional Information Available to select in "inspections" during checkout. Upload a 2D drawing with critical features identified. In addition, define part and feature quantities needed. Contact your account representative with questions

 

*Excludes: Thermoplastic elastomers (TPU, TPV, TPO, etc.) and Liquid Silicone Rubber (LSR). 

Download Sample CTQ DIR with Capability Study


Additional Inspection Reports


Benefits Verifies numerous critical dimensional specifications
Measurements Up to 50 measurements: ID/OD, plane-to-plane, hole location, and angles
Service Provided By A trusted third-party supplier (if lead time is critical, call your account representative for other options)
Additional Features Options include a 360-degree, 8+/-position 3D scanner that collects data, identifies dimensional variance, and creates a visual aid and color map for a direct CAD-to-scan comparison
Eligibility On-demand manufacturing, injection molding orders 
Additional Lead Time Quoted at time of order, typically 6+ business days
Price Additional charges apply. Contact your account representative for details
Sample Plan Random selection during the molding operation based on requested quantity specified
Additional Information Available to select in "inspections" during checkout. Contact your account representative with questions

 

Download Sample Digital Inspection Report

Benefits Verifies that a production process can reliably produce a quality part repeatedly
Measurements Nineteen components that range from customer approval to sample part production
Service Provided By A trusted third-party supplier (if lead time is critical, call your account representative for other options)
Additional Features Level 3 PPAP document is provided in PDF format for requested manufacturing orders
Eligibility All injection molding orders
Additional Lead Time Quoted at time of order, typically 11+ business days
Price Additional charges apply. Contact your account representative for details
Sample Plan Random selection during the molding operation based on requested quantity specified
Additional Information Available to select in "inspections" during checkout. Contact your account representative with questions

 

Download Sample PPAP



Custom Inspection

Additional inspection options are available, tailored to your requirements, allowing verification of numerous critical dimensions.
Contact your account representative to request a custom inspection.


How are Part Dimensions Measured? 

We use industry standard coordinate-measuring machines (CMM)—calipers and pin guages—just as you would expect from an industry leading manufacturing partner. What differentiates our process is that we’ve applied patented automation technology to our CMMs to enable in-process inspection with no additional cost or lead time.

Parts are measured at an equidistant cadence of n/30 where n = total part order quantity. Along with the measurement data from each part, the Capability Report will also provide the average measurement, standard deviation, and a Process Capability Index (Cpk) value for all critical dimensions. 

Additional Quality Capabilities

Medical Molding Capabilities

We do offer ISO 13485 injection molding capabilities through trusted partners.

 

Mold measurement process