Some blow molded parts are made by injection blow molding. Describe this process and discuss at least three advantages that it has over other blow molding processes
What will be an ideal response?
A preform is created through the injection molding process, it looks similar to a test tube with threads on the top. This preform is then taken to the blow-molding process where the mold clamps onto it and heats allowing the preform to droop.
Once sufficiently dropping a plunge assist bar is inserted into the preform helping the plastic stretch and gain crystallinity in the vertical direction, the plastic is blown at the same time stretching the plastic in the horizontal direction also giving it strength. Three advantages: there is just enough material for the process to be completed, allows for better definition of part
You might also like to view...
Answer the following statement(s) true (T) or false (F)
1. Almost all power supplies are shipped from the manufacturer with the voltage setting in the HIGH voltage (240 V) position. 2. The first step in the start-up procedure is to check all power and communication cables to ensure that the connector pins are straight, and not bent or pulled out. 3. Each time an input device is closed, the corresponding LED on the input module should illuminate. 4. There are three methods used to test output devices. 5. The electrician and/or technician should be aware of how the system normally functions if he or she expects to successfully troubleshoot the system.
Direct measurement devices are also referred to as being __________.
A. invasive B. noninvasive
Los empleadores sujetos a las exigencias de mantenimiento de registros de la OSHA deben mantener y conservar un registro de todas las enfermedades y lesiones laborales registrables durante:
a. 5 años. b. 7 años. c. 10 años. d. mientras la empresa esté en actividad.
Which of the following is defined as the length of time it takes for a wood support exposed to fire to reach an average temperature rise of 121°F or an individual temperature rise of 325°F when the temperature is measured on the plane of the wood nearest the fire?
a. Fire rating b. Finish rating c. Burn rating d. Fireproof rating