Preparation and inspection of silicone casting machine before starting
1. Equipment and environment inspection
Environmental requirements: Ensure that the operating area is dry and ventilated, away from fire and high temperature sources (the curing process of silicone may release heat, and high temperature environment is easy to accelerate curing), the temperature is controlled at 15-35℃, and the humidity is less than 70%.
Appearance of equipment: Check whether the various parts of the filling machine (such as barrels, pipes, valves, nozzles) are cracked, leaking or loose, especially whether the sealing cover of the silicone barrel is tightened to prevent air from entering and affecting the filling accuracy.
Electrical system: Confirm that the power cord is not damaged, the grounding device is reliable, and the control panel buttons and display screens are displayed normally (such as whether the temperature and pressure parameters are reset to zero or in the initial state).
2. Material and parameter settings
Silicone material:
Check whether the A and B component silicones are within the shelf life, whether there is stratification or curing, and stir them thoroughly before use (mechanical stirring needs to last 5-10 minutes to ensure uniform mixing).
Set the barrel heating temperature (usually 40-60°C, avoid exceeding 80°C to cause material denaturation) according to the type of silicone (such as room temperature curing, heating curing).
Parameter preset:
Set the injection pressure (usually 0.3-0.8MPa, adjusted according to the viscosity of the silicone, high viscosity requires increased pressure), flow rate (set according to product size, such as 0.5-10mL/s) and injection time (such as 10-30 seconds/time).
