Thermocouple

I. Core Measurement Tools High-precision contact thermometer: Accuracy class ≥ ±0.1℃, compatible with the K-type thermocouple temperature range. Serves as the temperature reference for calib

I. Preparation before calibration Tool Verification: Ensure you have a contact-type standard thermometer with an accuracy of ±0.1℃, a 0.01-grade digital multimeter, a digital vernier caliper, h

I. Source Control: Reducing Decomposition Product Generation from the Material End Raw Material Drying Control: Fluoroplastics (such as PTFE and PFA) must undergo strict vacuum drying before molding,

I. Core Structural Materials for Melt Contact Hastelloy C276: Exhibits extremely strong corrosion resistance to fluorinated decomposition products such as HF. It can be directly used in hot runner noz

I. Preferred material for the core melt contact area (nozzles, runner inserts) Recommended material: Hastelloy C276 Advantages: High molybdenum + tungsten ratio, its corrosion resistance to fluoride d

I. Core Corrosion Resistance Advantages Targeted Composition Design: Approximately 57% nickel, 16% molybdenum, and 3-4% tungsten, resulting in significantly superior resistance to fluorine-containing

I. Comprehensive Cost-Performance Comparison of Mainstream Materials Material Type Unit Procurement Cost (Ratio to H13 Steel) Service Life under Fluorine-Containing Conditions Processing Difficulty Ap

I. Low-concentration fluorine decomposition scenario (HF concentration < 50 ppm) Key characteristics: Only a small amount of fluoroplastics decomposes, with no obvious corrosion marks. The normal o

I. Low-concentration fluorine decomposition scenario (HF concentration < 50 ppm) Operating characteristics: Only a small amount of fluoroplastics decomposes; normal operating temperature of hot run

I. Pre-Installation Preparation Material Verification: Confirm that the ceramic liner is made of high-purity alumina (99.5% or higher), free of dark lines and pores, with inner and outer diameter tole

I. Appearance and Geometric Dimension Inspection Inner Wall Integrity Inspection: Use an industrial endoscope to scan the entire inner wall of the ceramic liner, confirming no dark lines, chipping, cr

I. Immediate Inspection During Installation Within 1 Hour After Hot Installation Cooling: After the nozzle has naturally cooled to room temperature and thermal stress has fully released, immediately c