Bioproducts - Plywood Manufacturing

Based on HW 4

What are the types of veneer?

Rotary, sliced

What is rotary veneer mainly used for?

Construction plywood

What is sliced veneer mainly used for?

High end, rough surface finishes

What are “bolts” in the context of veneer manufacturing?

Short sections of logs that are cut for peeling

What does preconditioning veneer wood due to the bolts?

Softens

Which of the following is NOT a direct benefit of preconditioning veneer wood?

Helps preserve grain pattern

What are the angles involved in rotary veneer cutting?

Rake, sharpness, clearance

In rotary veneer cutting, α represents the __ angle.

Rake

In rotary veneer cutting, β represents the __ angle.

Sharpness

In rotary veneer cutting, γ represents the __ angle.

Clearance

What is a nosebar in rotary veneer manufacturing?

A metal bar positioned directly in front of the cutting knife

What are the functions of a nosebar in veneer cutting?

Prevents veneer split, prevents rough surface

What is nominal veneer thickness determined by?

The rate of advancing of the knife per revolution of the bolt

The loose side is also called the _ side

Knife

The tight side is also called the _ side

Nosebar

How are lathe checks formed?

Veneer is bent sharply, creating tensile stress on loose side

What is the main problem caused by a dull lathe knife?

Fiber bows and wraps around knife

Which of the following is NOT an advantage of using a round-up lathe?

Improves veneer flexibility

What are the MAIN objectives of using clippers?

Minimize defect, maximize veneer recovery

Which of the following is NOT a benefit of veneer incising?

Decreases adhesive penetration into veneer

What are the types of veneer dryer?

Continuous, platen, radio-frequency

Which of the following is NOT a type of veneer dryer?

Convective

What are the methods of resin application?

Roll coater, curtain coater, foam adhesive extruder, sprayer

Which of the following is NOT a method of resin application?

Open mold casting

T or F: Adhesive is applied to both sides of the veneer during cold pressing

False

What are the main parameters of hot pressing?

Temperature, time, pressure

Which of the following is NOT a parameter of hot pressing veneer?

Relative humidity

Characteristics of Biomass - CHABV

cellular in nature, hygroscopic, anisotropic, biodegradable, viscoelastic

Adhesion Theories - WEDMC

wetted, electrostatic, diffusion, mechanical interlocking, covalent bonding