Podcast
Questions and Answers
What is the primary function of the sinker in knitting machines?
What is the primary function of the sinker in knitting machines?
- To control yarn tension
- To form loops (correct)
- To provide needle support
- To assist in yarn feeding
Which element is considered the main element of a knitting machine?
Which element is considered the main element of a knitting machine?
- Knitting Needle (correct)
- Needle Bed
- Sinker
- Cams
Which is NOT a function performed by sinkers in knitting machines?
Which is NOT a function performed by sinkers in knitting machines?
- Loop formation
- Yarn feeding (correct)
- Knocking-over
- Holding-down
Which part of the sinker prevents old loops from being lifted as needles rise?
Which part of the sinker prevents old loops from being lifted as needles rise?
In which types of knitting machines is loop formation NOT a function of the sinkers?
In which types of knitting machines is loop formation NOT a function of the sinkers?
What does the term 'knocking-over' refer to in the context of sinkers?
What does the term 'knocking-over' refer to in the context of sinkers?
The butts of sinkers are relevant for which of the following?
The butts of sinkers are relevant for which of the following?
Which of the following components is NOT a basic component of knitting machines?
Which of the following components is NOT a basic component of knitting machines?
What is the primary function of the knock-over sinker in knitting?
What is the primary function of the knock-over sinker in knitting?
What is the purpose of the jack in knitting technology?
What is the purpose of the jack in knitting technology?
What defines engineering cams in knitting machines?
What defines engineering cams in knitting machines?
Which type of cam directly affects the butts of needles in knitting machines?
Which type of cam directly affects the butts of needles in knitting machines?
What type of cam is characterized by its profile that produces precisely-timed movements?
What type of cam is characterized by its profile that produces precisely-timed movements?
What are knitting cams primarily made of?
What are knitting cams primarily made of?
Which of the following is NOT a type of knitting cam?
Which of the following is NOT a type of knitting cam?
In warp knitting machines, which cam type is specifically mentioned?
In warp knitting machines, which cam type is specifically mentioned?
What is the primary function of knitting cams in a knitting machine?
What is the primary function of knitting cams in a knitting machine?
In what type of knitting machine do needle butts pass through a stationary cam system?
In what type of knitting machine do needle butts pass through a stationary cam system?
Which cam system is NOT part of the needle cam system?
Which cam system is NOT part of the needle cam system?
What happens to the yarn feed position during weft knitting?
What happens to the yarn feed position during weft knitting?
Which cam can be adjusted to change the stitch length in a knitting machine?
Which cam can be adjusted to change the stitch length in a knitting machine?
Which component is part of the sinker cam system?
Which component is part of the sinker cam system?
What is the relationship between the cam system and the yarn packages in flat machines?
What is the relationship between the cam system and the yarn packages in flat machines?
Which of the following components is NOT found in the needle cam system?
Which of the following components is NOT found in the needle cam system?
What is the main function of the rising cam in a knitting machine?
What is the main function of the rising cam in a knitting machine?
What happens when the stitch cam is raised?
What happens when the stitch cam is raised?
What is the purpose of the return cam in the sinker system?
What is the purpose of the return cam in the sinker system?
Which cam is used specifically to withdraw the sinker from the knitting action?
Which cam is used specifically to withdraw the sinker from the knitting action?
How does the guard cam function in a knitting machine?
How does the guard cam function in a knitting machine?
What is achieved by the up-throw or counter cam?
What is achieved by the up-throw or counter cam?
What does the race cam do in a knitting machine?
What does the race cam do in a knitting machine?
Which statement best describes the function of the stitch cam?
Which statement best describes the function of the stitch cam?
What is the primary function of a sinker-return cam in knitting machines?
What is the primary function of a sinker-return cam in knitting machines?
How do cam systems generate displacements for different knitting machines?
How do cam systems generate displacements for different knitting machines?
What is the role of the needle bed in a knitting machine?
What is the role of the needle bed in a knitting machine?
Which of the following describes the engaged position of the sinker track during knitting?
Which of the following describes the engaged position of the sinker track during knitting?
What type of needle bed is categorized as a flat needle bed?
What type of needle bed is categorized as a flat needle bed?
During the yarn feeding process in circular weft knitting machines, which statement is true?
During the yarn feeding process in circular weft knitting machines, which statement is true?
Which statement accurately describes the three-stage needle displacement?
Which statement accurately describes the three-stage needle displacement?
What distinguishes a double needle bed from a single needle bed?
What distinguishes a double needle bed from a single needle bed?
Flashcards
Sinker
Sinker
A thin metal plate that helps form knit loops, often by holding down old loops.
Sinker function: loop formation
Sinker function: loop formation
The sinker helps needles create new knit loops, pushing yarn into place.
Sinker function: Holding-down
Sinker function: Holding-down
Sinkers hold down old loops so new loops don't get mixed up.
Knitting Needle
Knitting Needle
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Sinker parts: Butt
Sinker parts: Butt
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Sinker parts: Height of shank
Sinker parts: Height of shank
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Sinker parts: Neb
Sinker parts: Neb
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Sinker parts: Clearance
Sinker parts: Clearance
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Sinker's knock-over function
Sinker's knock-over function
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Jack (in knitting)
Jack (in knitting)
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Cam (in knitting)
Cam (in knitting)
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Engineering cam
Engineering cam
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Knitting cam
Knitting cam
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Knit cam
Knit cam
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Tuck cam
Tuck cam
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Miss cam
Miss cam
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Rising Cam
Rising Cam
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Stitch Cam
Stitch Cam
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Up-throw Cam
Up-throw Cam
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Guard Cam
Guard Cam
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Return Cam
Return Cam
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Sinker Withdrawing Cam
Sinker Withdrawing Cam
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What does the stitch cam control?
What does the stitch cam control?
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Sinker-return cam
Sinker-return cam
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Latch Needle Movement
Latch Needle Movement
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Cam systems
Cam systems
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Angular Knitting Cam
Angular Knitting Cam
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Needle Bed
Needle Bed
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Circular needle bed
Circular needle bed
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Revolving Cylinder Machines
Revolving Cylinder Machines
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Rotating Cam-box Circular Machines
Rotating Cam-box Circular Machines
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Flat needle bed
Flat needle bed
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Single needle bed
Single needle bed
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Needle Cam System
Needle Cam System
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Sinker Cam System
Sinker Cam System
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Double needle bed
Double needle bed
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Yarn feeding
Yarn feeding
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Stitch Length Adjustment
Stitch Length Adjustment
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Study Notes
Knitting Elements
- The basic elements of knitting machines include: knitting needles, the sinker, the jack, cams, and the needle bed, and yarn feeding.
The Sinker
- The sinker is the second primary knitting element (after the needle).
- It's a thin metal plate that operates approximately at right angles from the hook side of the needle bed, between adjacent needles.
- Its actions are dependent on the machine, and can include; loop formation, holding-down, and knocking-over.
Parts of the Sinker
- The main parts of a sinker include: butt, butt breadth, height of shank, bulge, length of neb, throat angle, sinker platform height, breadth of lower shank, clearance, and throat.
The Cam
- All knitting machines use cams to convert rotary motion into reciprocating motion for needles.
- Cams are carefully designed to produce precise movements.
- Cam movements can be graphed to represent timing.
Types of Cams
- Cams can be circular (engineering), or knitting cams.
- Engineering cams control the motion of elements, such as the bars of knitting machine.
- Knitting cams act on needle butts, for individual or serial movement, in latch needle weft knitting machines.
- Several different types of cams for knitting exist, including single acting, cam & counter cams, box cams, and contour cams.
Knitting Cams
- Knitting cams are solid steel plates.
- Each needle movement can be achieved through cams.
- Cams can be fixed, exchangeable, or adjustable depending on the machine.
The Needle Cam System
- The needle cam system includes clearing/rising cams, stitch/lowering cams, up-throw/counter/running cams, guard cams, and return cams.
The Sinker Cam System
- Components within the sinker cam system include, the race cam, the sinker-withdrawing cam, and the sinker return cam.
The Needle Bed
- The structure of the needle bed depends on the type of knitting machine.
- Used to hold needles and sinkers at a designated position and guide their movements during stitch formation.
- Two types of needle beds exist: circular and single. Additional types include double, and flat.
Yarn Feeding
- Two primary methods exist for yarn feeding: moving the needles past a stationary yarn feed, or moving the yarn past a stationary needle bed.
- Circular weft machines typically feature revolving cylinders, accompanied by stationary cams and feeders.
- Warp knitting machines often feature stationary needle beds, with yarn moving past them.
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