Compression Molding Process Capabilities
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Questions and Answers

What is the primary application of polyurethane foam processing?

  • Creating cellular structures with high stiffness
  • Making furniture cushions and insulating blocks (correct)
  • Spraying over surfaces for sound and thermal insulation
  • Cold forming metals at room temperature

In foam molding, what happens after the mixing of two or more components?

  • The mixture is heated to high temperatures
  • The mixture is cooled rapidly to form foam
  • The mixture solidifies with cellular structures (correct)
  • The mixture is sprayed over surfaces for insulation

What materials are typically used in cold forming and solid-phase forming processes?

  • Polyurethane, polystyrene, acrylic, and nylon
  • Aluminum, steel, copper, and titanium
  • Tungsten, nickel, silver, and gold
  • Polypropylene, polycarbonate, ABS, and rigid PVC (correct)

What are the advantages of cold forming of plastics mentioned in the text?

<p>Increased strength, toughness, and uniform elongation (C)</p> Signup and view all the answers

Why are considerations important in cold forming and solid-phase forming processes?

<p>To ensure the polymer is ductile at room temperature (C)</p> Signup and view all the answers

What is the key difference between foam molding and cold forming of plastics?

<p>Foam molding involves creating cellular structures, while cold forming works with metals (A)</p> Signup and view all the answers

What is the force required in injection molding for a gear with a cross-sectional area of 9500mm^2?

<p>0.95 MN (B)</p> Signup and view all the answers

How many cavities can the mold accommodate in the injection molding process described?

<p>One cavity (C)</p> Signup and view all the answers

Which molding process involves forcing a monomer and reactive fluids into a mixing chamber and mold cavity?

<p>Reaction-injection Molding (B)</p> Signup and view all the answers

What materials can be used in rotational molding?

<p>Both thermoplastics and thermosets (B)</p> Signup and view all the answers

Which molding process involves forming thermoplastic sheets or films over a mold through heat and pressure?

<p>Thermoforming (C)</p> Signup and view all the answers

What type of molds are usually used in thermoforming?

<p>Aluminum molds (A)</p> Signup and view all the answers

Which molding process is similar to forging and involves forming under pressure?

<p>Compression Molding (B)</p> Signup and view all the answers

What is the main characteristic of foam molding products?

<p>Solid outer skin and cellular core (D)</p> Signup and view all the answers

Which of the following materials is commonly used in foam molding?

<p>Expandable polystyrene beads (A)</p> Signup and view all the answers

What is the purpose of using a blowing agent in foam molding?

<p>To create an expandable polymer mixture (C)</p> Signup and view all the answers

Which process involves casting plastic material around an electrical component to embed it?

<p>Potting and encapsulation (B)</p> Signup and view all the answers

What is the main characteristic of products made through structural foam molding?

<p>Solid outer skin and cellular core structure (B)</p> Signup and view all the answers

Which process is a further development of compression molding?

<p>Transfer molding (D)</p> Signup and view all the answers

What is the main advantage of foam molding over traditional molding processes?

<p>Ability to create products with cellular structures (D)</p> Signup and view all the answers

In which type of molding process are molds more expensive compared to other processes?

<p>Transfer molding (B)</p> Signup and view all the answers

What is the primary characteristic of parts produced through compression molding compared to injection molding?

<p>Cheaper dies (C)</p> Signup and view all the answers

What distinguishes foam molding from traditional compression molding processes?

<p>The ability to create cellular structures (D)</p> Signup and view all the answers

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