2nd​/3rd shift Cleanroom Rubber Miller

CLEANROOM MILLER

ISO Class 7 Cleanroom Operations

Department: Cleanroom Operations

Job Title: Cleanroom Miller

Reports To: Cleanroom Supervisor

Produce cleanroom rubber and silicone compounds by accurately weighing, combining, and milling approved materials using designated cleanroom mixing and milling equipment. Prepare material in the correct quantity, form, and weight according to the mold schedule and approved work instructions. The goal is to have properly identified, packaged, and conditioned material available before molding requires it while preventing contamination, material mix-ups, and loss of traceability.

• Accurately use calibrated scales to check-weigh base materials, colorants, additives, samples, and prepared material within specified tolerances.
• Operate designated cleanroom mixing and milling equipment, including Ross-type mixers or other approved equipment, according to the Job Instruction Sheet (JIS), milling order, cutting record, and established operating procedures.
• Prepare rubber or silicone material in the required size, shape, quantity, and weight using approved cleanroom tools and cutting techniques.
• Verify the correct material identity, lot number, formulation, colorant or additive, quantity, equipment, tooling, and documentation before beginning each job.
• Follow approved addition sequences and special handling instructions to achieve uniform dispersion while preventing concentrated colorant or additives from contacting unapproved surfaces.
• Maintain strict containment and segregation of compounds, ingredients, tools, containers, work surfaces, and documentation throughout weighing, milling, cutting, packaging, and transfer.
• Perform complete line clearance and equipment cleaning between jobs to prevent cross-contamination, carryover, and material or lot mix‑ups.
• Monitor material appearance, consistency, temperature, dispersion, and other required in‑process characteristics; stop work and consult Supervision or Quality when results or instructions require verification.
• Accurately enter milling and preparation information, record actual material usage and yield, and produce required bin tags for material identification and batch traceability.
• Package, label, condition, and store prepared compounds according to established shelf‑life, cleanliness, temperature, and material‑control requirements.
• Prioritize work according to the approved mold schedule so prepared material is available before the molding operation requires it.
• Learn to prepare all assigned cleanroom compounds using the applicable mixing, milling, weighing, and material‑preparation equipment.
• Perform assigned work in an ISO Class 7 cleanroom and comply with all cleanroom gowning, hygiene, entry, material‑transfer, and contamination‑control requirements.
• Follow approved methods, Job Instruction Sheets (JIS), customer specifications, and established ISO procedures.
• Use proper line‑clearance procedures and maintain segregation of product, materials, tools, and documentation.
• Use bin tags and routing information to move product accurately to the next required operation.
• Inspect product and process output as assigned; identify and communicate damaged, contaminated, mixed, or otherwise nonconforming product.
• Accurately record and communicate production data using the APPX ERP system and required production documentation.
• Follow standard safety procedures, Safety Data Sheet (SDS) requirements, and personal protective equipment requirements.
• Effectively communicate with Leads, Supervisors, Quality, Engineers, and co‑workers within and between departments.
• Consistently meet productivity expectations while maintaining product quality and cleanroom compliance.
• Demonstrate regular and…