Operating Standards for the Assembly of Precision Injection Molds
The assembly of precision injection molds is an exact process that directly affects product quality.
Preparatory Work
1. Inspect Parts
Carefully examine all mold components to ensure they are free from burrs, scratches, cracks, and other defects.
Clean Parts
Use appropriate cleaning agents and tools to remove grease, dust, and other impurities from the parts.
Prepare Tools
Ensure all necessary assembly tools, such as torque wrenches, micrometers, feeler gauges, and screwdrivers, are in good working condition.
Familiarize with Drawings
Carefully review the mold assembly drawings to understand the fitting relationships, assembly sequence, and required fastening torque.
2. Assembly Process
Establish Reference Points
Determine the assembly reference points based on the drawings and follow the specified sequence for alignment and assembly.
Assemble Small Components
Assemble smaller mold components, such as guide pins, guide sleeves, and ejection mechanisms, as per the drawings, and check whether the fit clearance meets the requirements.
Assemble Core Components
Install core components like cavities and cores, ensuring the mating surfaces remain clean. Tighten screws to the specified torque.
Assemble Cooling System
Connect cooling system components, such as water pipes and temperature sensors, as required by the drawings, and check the connections for proper sealing.
Assemble Venting System
Verify that vent holes are correctly positioned and in sufficient quantity, and ensure the venting channels are unobstructed.
Final Assembly
Combine all assembled components into the complete mold. Check the mold’s opening, closing, and alignment for smooth operation without any jamming.
Adjustment
Make fine adjustments based on trial mold results, such as optimizing the fit clearance between the core and cavity or adjusting the cooling water flow rate.
3. Precautions
Cleanliness
Maintain cleanliness throughout the assembly process, keeping the workspace and components free of debris to prevent contamination inside the mold.
Handle with Care
Handle mold components gently during transportation and assembly to avoid damage from impact.
Fastening Torque
Tighten screws to the exact torque specified in the drawings. Over-tightening or under-tightening can compromise the precision and lifespan of the mold.
Fit Clearance
Ensure all fit clearances meet the specified requirements, as deviations can affect product quality.
Record Data
Document key assembly data, such as part numbers and fastening torque values, to facilitate future maintenance and repairs.
Safety First
Prioritize safety during the assembly process by wearing protective gear, such as gloves, to prevent injuries.
