baoshi-was/database/seeds/PrintPartSeeder.php

<?php

use Illuminate\Database\Seeder;
use App\PrintPart;

class PrintPartSeeder extends Seeder
{
    /**
     * Run the database seeds.
     *
     * @return void
     */
    public function run()
    {
        $printParts = factory(PrintPart::class)->times(100)->make()->toArray();
        PrintPart::query()->insert($printParts);
    }
}