J.J. Plastalloy R&D Engineer Interview Questions and Answers

Q1. No questions only politics
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Q2. Only Politics no value for knowledge.
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Q3. Related questions about your family background and mounding
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Q1. 3d need split core cavity
Ans. 
A split core cavity is necessary for creating 3D designs.
• Split core cavity allows for easier removal of the final product from the mold.

• It also allows for more complex designs to be created.

• Examples include intricate jewelry designs and detailed automotive parts.

• Split core cavity can be achieved through various methods such as using sliders or lifters.

• It is important to consider the material being used and the desired
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Q2. Shrinkage of plastics
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Shrinkage of plastics is a common issue in injection molding.
• Shrinkage occurs when the plastic cools and solidifies, causing it to contract.

• Factors affecting shrinkage include material type, mold design, and processing conditions.

• Compensating for shrinkage can be done by adjusting the mold or adding more material.

• Examples of plastics prone to shrinkage include ABS, polycarbonate, and nylon.
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All technical skills and your previous experience as well as field experience.

Q1. GD&T questions.
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Q1. 1) self introduction 2) Previous company roles and responsibility 3) qms and iatf system 4) Supplier quality assurance 5) Supplier audit, visit, evaluation 6) Process audit and iqa 7) Closing NC with 8d re...read more
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Q1. What are your salary expectations?
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Q2. What is your family background?
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Q3. Share details of your previous job.
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Q4. Why are you looking for a change?
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Q5. Tell me about yourself.
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Q1. What about your self
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Q2. Cpk and cpk difference
Ans. 
Cpk and cpk are statistical measures used to assess the capability of a process to meet specifications.
• Cpk measures how well a process can produce output within specification limits.

• Cpk takes into account both the mean and the variation of the process.

• Cpk is calculated as the minimum of (USL - mean) / (3 * standard deviation) and (mean - LSL) / (3 * standard deviation).

• Cpk should be at least 1.33 to indicate a capable ...read more
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Q3. Proces audit defination
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Q4. Product audit defination
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Q5. IATF and ISO documentation
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Q1. Which problems are coming in injection molding Machine mostly and how is it control ?
Ans. 
Common problems in injection molding machines include overheating, warping, and flash. These can be controlled through proper maintenance and monitoring.
• Overheating can be caused by a malfunctioning cooling system or excessive cycle times. Regular maintenance and monitoring of temperature settings can help control this issue.

• Warping occurs when the molded part cools unevenly, leading to distortion. Proper mold design, ...read more
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Q2. Volve functioning and major problem of volve?
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Volve is a type of valve used to control the flow of fluids in a system.
• Volve functions by opening and closing to allow or restrict the flow of fluids.

• Major problems with volve include leakage, blockage, and malfunctioning due to wear and tear.

• Examples of volve include ball valves, gate valves, and butterfly valves.
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Q1. Personal details in terms of experience
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Q2. Self family back ground etc
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Q1. Details of prior experience
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Q2. Expectation from company
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