Pyramid's Quality Assurance Inspection Procedures
Acceptance and Pre-Production Testing
Acceptance criteria for the resins we use have been determined by performance history and production experience. These criteria are provided to resin suppliers and are certified by the supplier. If these criteria are met and the materials processed correctly, we are assured we will achieve the processability and functionality we need to meet customer and internal requirements.
When review of resin supplier certifications determines that ordering criteria have been met, the resin lot is prepared for pre-acceptance testing.
Pre-acceptance tests are not made for any particular job or company but are performed on new lots of material before they are accepted for use in making belts. When a new lot of material comes in, a certain amount is extruded and made into belts for test purposes. Test results are recorded in a custom-designed interface which not only calculates the PSI, but collects information relevant to that specific lot of resin.
These pre-acceptance tests must meet certain criteria for the material to be accepted for production use. If the tests meet our specifications, the material is accepted by the Manager of General Services and further tests are scheduled to determine the optimum temperature for welding material of that lot.
Material is released for production extrusion only after being verified as meeting our tensile strength standards. Results of all pre-acceptance tests are saved in the database which contains all tensile strength tests.
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