The injection cylinder temperature is really low. Boost the capability of the hopper neck area or reduce the roller tube temperatures. Vinyl from the hopper and the pipe wall. The injection section wall is narrow, and plastic can’t flow. The nozzle component is sealed. Check the nozzle hole for plastic or object. Examine the heater outside and assess the electricity output is accurate. Assess the port, whether its block or not. Examine the performance is secure. Injection moulding machine capability is too little (that’s, injections, or burden plasticizing ability). Use a plastic injection moulding device. We all could use your assistance if you have access or a 3D printer to school supplies!