Top 100+ Molding Interview Questions And Answers

Question 1. What Is The Important Characteristics Of Plastics?

Answer :

It may be molded into completed product by software of heat and strain.

Question 2. What Are The Advantages Of Plastics Over Metals?

Answer :

Low weight 
Corrosion resistance 
Insulation homes
Electrical residences
Cheaper 
Easy to address 
Surface homes 
Reusable
Production and Operations Management Interview Questions
Question 3. Explain The Disadvantages Of Plastics?

Answer :

Low energy 
Low warmness resistance
Poor mechanical properties
Difficulty to restore
Question 4. How To Classify The Plastics?

Answer :

Natural : milk of rubber tree, cellulose
Semi artificial
Synthetic
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Question five. Types Of Plastics Based On Chemical Behavior?

Answer :

Thermo plastics 
Thermosetting plastics
Civil Engineering Interview Questions
Question 6. Difference Between Thermo Set And Thermo Plastics?

Answer :

Thermoplastics:

Can be re softened and reused
No chemical changes all through heating.
In granular form
Needle structure 
Hard but no longer brittle
Thermo set plastics:

Cannot be re softened and reused
Chemical modifications throughout heating etc.
In powder form
Cross connected structure 
Hard and brittle 
Question 7. Give Example Of Thermoplastics?

Answer :

ABS, PP, CA, PMMA, PS, PC, POM and many others.

Production Planning and Control Interview Questions
Question 8. Perspex Is The Trade Name Of ---- ?

Answer :

CA

Question nine. Nylon Is The Trade Name Of ---- ?

Answer :

PA

Production Engineer Interview Questions
Question 10. Delrin Is The Trade Name Of ---- ?

Answer :

POM

Question eleven. Teflone Is The Trade Name Of ……….?

Answer :

PTFE

Plastics Interview Questions
Question 12. What Is Mfi?

Answer :

Flow capability of various grades of thermoplastics are inversely proportional to molecular weight.

Production and Operations Management Interview Questions
Question thirteen. About Abs?

Answer :

Shrinkage 0.5%. It is warmth resistant, affords appropriate insulation and exhibit electric houses. Examples are fashionable motive protection helmets, pipe fittings, tv, radio and so forth.

Question 14. About Ca ?

Answer :

Shrinkage 0.3-0.8%. Its predominant residences are transparency and surface texture. Examples are Tool manage, goggles, TV displays.

Question 15. About Hdpe?

Answer :

Shrinkage 3-4%. Main capabilities of HDFE are high density, stress, energy, hardness and chemical resistance. Examples are milk bottle crates, fish boxes etc.

Manufacturing Industries Interview Questions
Question sixteen. About Ldpe?

Answer :

Shrinkage 0.8-1.Five%. It is crystalline and not available in obvious shape. Examples are buying baskets, waste baskets and so forth.

Question 17. About Pa?

Answer :

Shrinkage zero.7-1.5%. It is difficult and high rigid. Examples are mild duty gears, sprockets, bearings and so on.

Steel Structures Design Interview Questions
Question 18. About Pc?

Answer :

Shrinkage zero.Five-0.7%. It is known optical transparency, stress and longevity. Examples are goggles, lenses, protection helmets and many others.

Civil Engineering Interview Questions
Question 19. About Pp?

Answer :

Shrinkage 1-three%. It is flammable and degradable in solar mild and stable. Examples are air cleaner, garden furniture and so on.

Question 20. About Ps?

Answer :

Shrinkage 0.2-zero.Eight%. It is clear, brittle and it can be without problems molded. Examples are toys, residence preserve home equipment, electronic housings and so on.

Production Supervisor Interview Questions
Question 21. About Pvc?

Answer :

Shrinkage (FLEXI 1.Five-three%,RIGID zero.2-0.Four%). It is inflexible and now not very hard and very low value. Example - Pipes fittings.

Question 22. Examples For Thermosetting Materials ?

Answer :

Alkyds, epoxies, pf, mf, urea, polyester.

Question 23. What Is Fillers And Additives?

Answer :

Adding of small molecules to plastics to get a few traits (shade, flexibility and so on.). Fillers are typically used with thermosetting plastics. Additives are of two kinds,

Physical approach inclusive of plasticizer
Chemical way--- stabilizer. 
Steel Production Interview Questions
Question 24. What Are The Mold Release Agents?

Answer :

External with mildew surface e.G. Polyvinyl alcohol 
Internal with resins eg. Silicon oil 
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Question 25. What Are The Types Of Injection Molding Machines?

Answer :

Plunger injection cylinder 
Two degree plunger injection cylinder 
Pre plasticizer two level screw injection cylinder 
Reciprocating screw injection cylinder
Question 26. What Are The Divided Sections Of Screw Of Injection Molding Machines ?

Answer :

Feed quarter 
Compression quarter 
Melting region  
Civil Service Interview Questions
Question 27. What Do You Meant By Nozzle ?

Answer :

Nozzle related to the cease of the barrel via which soften materials inserted in the mildew.

Production Engineer Interview Questions
Question 28. What Are The Types Of Nozzle ?

Answer :

Reverse taper (melt valve) - for PA,ABS and so forth.
Removable tip
Standard of standard motive
Question 29. Define Drooling ?

Answer :

Leakage of plastic cloth through the nozzle in between pictures.

Predictive Modeling Interview Questions
Question 30. What Is Injection Capacity Or Short Capacity?

Answer :

Maximum volume material injected with the aid of the screw at some point of one cycle of operation.

Question 31. What Is Plasticizing Capacity ?

Answer :

It is the quantity of cloth that may be processed by using the gadget in line with hour. It is expressed in kg/h.

Question 32. What Is Injection Pressure?

Answer :

It is the maximum strain by means of which the cloth is injected thru the nozzle. It is given in kg/cm2.

Question 33. What Is Injection Rate Or Injection Velocity ?

Answer :

It is the maximum price at which the screw can inject or shoot substances from the barrel during one shot.

Plastics Interview Questions
Question 34. What Do You Meant By Clamping Force?

Answer :

It is the most force that the clamping gadget can exert on the mildew or it is the most pressure via which the mold halves can be closed collectively. It is given in ton or kilo Newton.

Question 35. What Is Maximum Daylight?

Answer :

It is the most distance that the machine platen can be separated from each different and it can be obtained via including the most mold thickness to the maximum establishing stroke.

Question 36. What Is A Mold ?

Answer :

It is a custom construct tool in which we converts plastic raw cloth into finished product.

Manufacturing Industries Interview Questions
Question 37. What Are The Main Elements Of Mold ?

Answer :

The predominant parts of molds are center and hollow space.

Question 38. What Are The General Types Of Mold ?

Answer :

Injection molds, compression molds, switch molds.

Question 39. What Are The Types Of Injection Mold ?

Answer :

Two plate mold 
Three plate mold 
Hot runner mould 
Insulated runner mold 
Hot manifold mold 
Stacked mold 
Question 40. What Is Two Plate Mold ?

Answer :

Mold which includes core and cavity situated in plates. It is logical kind device wherein factor require huge gate. For easy type components there's simplest one sunlight hours.

Steel Structures Design Interview Questions
Question 41. What Is 3 Plate Mold?

Answer :

It consists feed plates with core and hollow space.

Question forty two. What Is Hot Runner Mold?

Answer :

In this, runner stored hot to preserve the molten steel into fluid country also known as runner much less mould. In this, runner contained in a plate of its own runner segment of the mildew isn't opened in the course of molding cycle.

Production Supervisor Interview Questions
Question forty three. Note Down The Advantages Of Runner Mold ?

Answer :

No molded facet merchandise 
No keeping apart of gate
Cycle time can be decreased
Question forty four. What Is Insulated Runner Mold ?

Answer :

It is a variation of warm runner mildew on this type of molding. The outer surface of the fabric in the runner acts as a insulator.

Question 45. What Is Hot Manifold Mold ?

Answer :

This is a version of the heated warm runner and now not the runner plate. This is carried out the use of electric powered cartridge.

Question forty six. What Do You Meant By Stacked Mold?

Answer :

A stacked mold is a more than one two plate mildew with mildew placed one over the opposite. A stacked mould construction doubles the output from a unmarried molding device and requires the same clamping force.

Question 47. Explain About Injection Molding?

Answer :

In this method, the plastic fabric is injected in to the mould via a sprue bush with the aid of a screw plunger. This procedure can be used for both thermosetting and thermoplastic materials.

Question forty eight. What Is Compression Molding?

Answer :

In this process, the plastic cloth is positioned within the hollow space and use a pressure for compressing the compound as the mould closes, those molds are usually used for thermosetting substances. 

Question 49. What Is Transfer Mold?

Answer :

In this process, the plastic materials is transferred from a switch pot after which forced in to the cavity by using plunger. This approach is used for molding thermosetting substances simplest.

Question 50. Write A Short Note About Blow Molding ?

Answer :

Blow molding may be very similar to compression molding because the blow mold usually closes on a hollow form that has been deposited in among the halves of the mildew. Air or gasoline stress is added on the middle. This internal stress causes a waft of the heated fabric in to intimate touch with the surprisingly bloodless mould sections. Here the plastic cloth solidifies and is eventually ejected.

Question 51. Explain Vacuum Molding?

Answer :

The mould used for this system is similar that of the girl half of of the compression or blow mildew auxiliary system at the machine heats the fabric and drags it over the cavity as indicated through the suitable technique selected.

Question 52. Elaborate About Rotational Molding?

Answer :

The device provides the way of keeping the mildew and rotating it about two axis on the same time. This rotation reasons the powdered material that become loaded in to the mildew before it was clamped in to the device to solidify and adhere to the wall of the mold.

Question fifty three. What Is Impression ?

Answer :

Gap between center and cavity is referred to as affect. Impression presents the shape of the issue.

Question fifty four. What Do You Meant Cavity?

Answer :

Female part of the mould and it gives outside form.

Question fifty five. What Is Core ?

Answer :

Male portion of the mold and it gives internal form.

Question 56. What Is Sprue Bush?

Answer :

Connecting member among sign up ring and runner.

Question fifty seven. What Is Register Ring ?

Answer :

It is used to align the mold with system platen.

Question 58. What Is Runner?

Answer :

Connecting member between gate and sprue bush.

Question fifty nine. What Is Gate?

Answer :

Connecting member between impression and runner.