CDR Sample for Engineering Professionals (nec)

1. To carry out the brief literature review of the screen printing machine, its working principle, components involved and form methodology on that basis.
2. To select the best technique for screen printing and decided to use automation on the technique by introducing motors, actuators and sensors.
3. To hold a meeting with clients to understand their requirement of machine and form design concepts.
4. To conduct necessary calculations for different machine requirements.
5. To select different items such as caviar beads, cracking ink, discharge ink, glitter, metallic ink, photo emulsions, squeegee etc.
6. Furthermore, to purchase the materials from appropriate vendor by conducting an analysis of their previous works and the quality of products offered at a given price.
7. To develop a Solid Works model of the parts and assembly of the components involved.
8. To fabricate the model in the workshop according to design and calculations.
9. To conduct a final test to analyze the final product and make the necessary corrections and document the final data.
10. To submit the final report based on the findings to the supervisor for approval and orated the findings to the company staff to inform them about the completion of the project.

1. Problem 1 Career Episode 1 and its solution

One of the problems author found during the repeated testing and analysis phase was the presence of dust, creating the losses of print on the surface as well as the screen. As he used an automated process to apply ink, the ink was exposed to the environment creating the chances of dust. Also, the handling of material in the company by workers were inappropriate and incautious. Due to the exposure of the ink to the environment, the process showed several losses of prints on the screen as the ink did not apply properly on the t-shirt. It was especially seen when printing fine drawings. This was a serious problem that had to be mitigated. He held a meeting with the supervisor and experts to discuss the issue with them. He found that the damaged prints in the screen could be removed using the screen photo emulsion remover. This not reduced the wastage, but also helped to reuse it. He applied the screen photo emulsion remover to clean the surface and reuse the screen. After that, the hose was used to clean the screen to make it new and repeat the process again. Also, multiple images could be printed using the same screen, making it versatile. Hence, no wastage of screen material was incurred, and it could be used again and again for a similar purpose. He also set guidelines for the workers to use clean substance and transferred the machine used in an isolated room to protect it from additional dust.

2. Problem 2 Career Episode 1 and its Solution

Next problem that incurred in the project was the gap between the spreader and the squeegee was large. The squeegee was not able to cover all the screen making the loss of design in some part. He found the problem during the testing of the printing, especially for the large picture. This was a design problem as he had not looked for the cases of a larger picture where all the screen was utilized for the process. This problem limited the use of the printer to print smaller pictures only in the t-shirt making it less effective. This was really undesired for the machine. In order to solve the problem, he discussed the problem with the team working together along with the supervisor. He found the problem was with the mechanism used for the application of the spreader. Instead of using the spreader only one direction, he used slider crank mechanism to make the spreader move to and fro so that the spreader covered a larger area, and the gap between the spreader and squeegee was minimized. Thus, an alternative approach solved the problem making the print better and consistent.