This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: What is the principle problem when forming a bottle using injection molding? What will be an ... (Read 52 times)

jasdeep_brar

  • Hero Member
  • *****
  • Posts: 569
on: Aug 19, 2018
What is the principle problem when forming a bottle using injection molding?
 
  What will be an ideal response?

Question 2

What key processing considerations must be met in order to use PET to make soft-drink bottles?
 
  What will be an ideal response?


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

Alyson.hiatt@yahoo.com

  • Sr. Member
  • ****
  • Posts: 354
Reply #1 on: Aug 19, 2018
Answer to Question 1

If the diameter of the mouth of the bottle is smaller than the diameter of the body, some method must be provided to remove the core pin. The core pin will have the diameter of the body and, therefore, must collapse or be reduced in diameter by some other method. This is a difficult mechanical problem that is eliminated when blow molding is the method for forming the bottle.

Answer to Question 2

The parison must be formed as an amorphous material. Therefore, it is formed from hot resin and quenched quickly. Then, the material is heated to about 30C above the Tg and stretch blow molded. This stretching gives biaxial orientation and induced crystallization which increases many desirable properties of the bottle.


jasdeep_brar

  • Member
  • Posts: 569
Reply 2 on: Aug 19, 2018
Thanks for the timely response, appreciate it

mammy1697

  • Member
  • Posts: 341
Reply 3 on: Yesterday
Gracias!

« previous next »
 

Did you know?

Stevens-Johnson syndrome and Toxic Epidermal Necrolysis syndrome are life-threatening reactions that can result in death. Complications include permanent blindness, dry-eye syndrome, lung damage, photophobia, asthma, chronic obstructive pulmonary disease, permanent loss of nail beds, scarring of mucous membranes, arthritis, and chronic fatigue syndrome. Many patients' pores scar shut, causing them to retain heat.

Did you know?

Amoebae are the simplest type of protozoans, and are characterized by a feeding and dividing trophozoite stage that moves by temporary extensions called pseudopodia or false feet.

Did you know?

In 1835 it was discovered that a disease of silkworms known as muscardine could be transferred from one silkworm to another, and was caused by a fungus.

Did you know?

An identified risk factor for osteoporosis is the intake of excessive amounts of vitamin A. Dietary intake of approximately double the recommended daily amount of vitamin A, by women, has been shown to reduce bone mineral density and increase the chances for hip fractures compared with women who consumed the recommended daily amount (or less) of vitamin A.

Did you know?

Patients who have undergone chemotherapy for the treatment of cancer often complain of a lack of mental focus; memory loss; and a general diminution in abilities such as multitasking, attention span, and general mental agility.

Galaxies Forming by Combining Smaller Units Galaxies Forming by Combining Smaller Units
Umberto Boccioni, Table + Bottle + House. Umberto Boccioni, Table + Bottle + House.
Administering a Z-Track Injection Administering a Z-Track Injection
An upward-sloping spark line usually indicates a mechanical engine problem or a lean air–fuel ... An upward-sloping spark line usually indicates a mechanical engine problem or a lean air–fuel ...
Viral Math Problem Solved | Only for Geniuses Viral Math Problem Solved | Only for Geniuses
Gestalt Principle: Continuity Gestalt Principle: Continuity
Video: EpiPen Animation (Part 2)

For a complete list of videos, visit our video library