FORD W-IMMS:2018

FORD W-IMMS:2018

CONTROL OF PLASTIC INJECTION MOLDING PROCESSES

36,75 €

Details

GENERAL DESCRIPTION



This standard defines the requirements for the control of plastic injection molding processes.



These requirements reflect the following manufacturing concepts:



• Robust part and mold designs lay the oundation of a robust injection molding process.



• Process consistency, shot to shot and run to run, is the first step towards producing quality injection molded parts.



• Startup verification plays an important role in preventing injection molding process mean shift over time.



• In-process machine and process status monitoring is necessary to provide an early warning for potential quality deviations.



• Effective machine and mold preventive maintenance contributes to process consistency in long term production.



• Proper verifications are necessary when changes in process, part, mold, or machine take place.



There are five appendices in W-IMMS. These appendices provide guidelines, or methods or procedures for injection molding manufacturing feasibility assessment, molding process development, molding process monitoring, appearance inspection, as well as W-IMMS compliance.



Appendix A “Plastic Injection Molding Manufacturing Feasibility Assessment: Part, Mold, and Molding Process” provides a tool for assessing the robustness of part design, mold design, mold construction, and molding process at each stage of the development of an injection molded part.



• Part design



• Initial mold flow simulation without mold cooling channels



• Mold flow simulation with mold cooling channels



• Mold design



• Mold tryout



• Mold home line tryout



Appendix B “Selected Procedures and Methods for Machine and Mold Robustness Check and Molding Process Development” lists recommended procedures and methods that are used in the development of molding process, verification of machine and mold robustness, and establishment of production startup window.



Appendices C “Recommended Methods and Frequencies for In-Process Monitoring” and D “Evaluation Tools for Comparing Production Parts to Minimum Appearance Standard AAR" list recommended methods and frequencies for in-process monitoring and evaluation tools for appearance quality respectively.



Appendix E: “W-IMMS Compliance Checklist” provides a tool for the molder to assess whether its injection molding system meets the requirements in W-IMMS. The molder should always refer to the main text of this standard for details and clarification of each requirement. To facilitate the assessment, an Excel workbook of the checklist (also known as CQI-23 Ford Specific Assessment) is available to Ford suppliers via Ford Supplier Portal.



When a plastic part quality issue arises, Section 7 “Critical Response List” provides a list of recommended actions for suppliers during problem solving.



APPLICATIONS AND LIMITATIONS



This standard applies to all plastic injection molded production and service parts manufactured by tier 1 and sub-tier suppliers to Ford Motor Company. Exceptions to the standard shall be reviewed and concurred by Ford STA (Supplier Technical Assistance).



The intent of this standard is to deploy specific plastic molding best practices and lessons learned that are proven effective in the development and control of injection molding processes, as well as in the prevention of recurrence of quality issues. For plastic molding general quality practices, molding suppliers to Ford Motor Company are required to conduct self-assessment by using AIAG CQI-23: Special Process: Molding System Assessment.



This standard uses key items in injection molded part design, mold design, and mold construction as design for manufacturing indicators, defines assessment methods, and sets part and mold robustness criteria based on benchmark data. However this standard should not be interpreted as a part design standard or a tooling standard for injection molded parts. Whenever a conflict between this standard and an applicable engineering specification or between this standard and an applicable tooling specification arises, final decision shall be made by a team consisting of Ford Engineering, Ford STA, and the supplier or the suppliers shall final decision.



In this standard, the word “SHALL” is used to indicate a requirement. The molder needs to take immediate actions to address any area that is not in compliance with the requirement. The word “SHOULD” is used to indicate a recommended best practice only.

Zusätzliche Information

Autor Ford Motor Company (FORD)
Veröffentlicht von FORD
Document type Normen
Ausgabe 4
Seitenzahl 62
Ersetzt FORD W-IMMS:2015