To Print from Chrome without the dialog box, the easiest way is to make a new shortcut for Chrome on your desktop. Right click on the shortcut and choose properties. Edit the shortcut by adding -kiosk-printing after the shortcut. When done it should look like this:
"C:\Program Files (x86)\Google\Chrome\Application\chrome.exe" -kiosk-printing
This is assuming your Chrome.exe file is in the folder listed above. This is the default for Windows 10. If you have it in a different folder, you may have to search for it, then create a desktop shortcut icon and edit as above.