Flat Knitting Machine Cam System for Split-Knit Mode Switching
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Solution Overview
Problem
Existing flatbed knitting machines require movable pressers for exclusive use in split knit operations, which occupy valuable space and limit the ability to change over between knit and tuck operations without additional actuators, due to the need for separate pressers for each mode.
Innovation Solution
A flatbed knitting machine design featuring a cam system with a bifurcating slider operating cam and a change over presser that allows the slider to be kept in position during split knit operations without a movable presser, enabling reliable mode switching by pressing the slider's auxiliary butt, eliminating the need for exclusive pressers and optimizing space usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a movable presser is provided for exclusive use in split knit operations, then reliable mode switching between knit and split knit is achieved, but the device complexity increases and valuable space is occupied
Solution Approach 1:
The patent merges the split knit presser function with the existing knit presser by making it a common presser that can perform both functions. The presser is positioned to work with the bifurcating cam path, allowing it to control the slider in both knit and split knit operations through a single unified mechanism rather than requiring separate pressers for each mode.
Solution Approach 2:
The presser is designed as a universal component that serves multiple functions: it acts as both the knit presser and the split knit presser. By positioning the presser to engage with the bifurcating cam path and the slider's auxiliary butt, a single presser mechanism can control both knitting modes, eliminating the need for dedicated movable pressers for split knit operations.
2Ease of operation
If separate pressers are provided for knit and split knit operations, then each operation has dedicated control, but the space requirements increase and actuators are limited
Solution Approach 1:
The patent combines the control functions for both knit and split knit operations into a single presser mechanism. This presser is strategically positioned to interact with the bifurcating cam path, allowing one presser to control both knitting modes by engaging with different parts of the cam mechanism depending on the selected operation mode.
Solution Approach 2:
The presser system is designed as a universal control mechanism that can perform both knit and split knit operations. By making the presser multi-functional and positioning it to work with the slider's auxiliary butt and the bifurcating cam, the system achieves dedicated control for each operation mode without requiring separate pressers, thereby optimizing space utilization.
3Device complexity
If the presser is positioned to work with the bifurcating cam path, then a single presser can control both knit and split knit modes, but the positioning precision requirements increase
Solution Approach 1:
The bifurcating cam acts as an intermediary mechanism between the presser and the slider. The cam's bifurcating path translates the presser's single positioning into two distinct operational paths: one for knit mode and another for split knit mode. This intermediary cam mechanism absorbs the positioning requirements, allowing the presser to be positioned once while still achieving precise control over both operation modes through the cam's geometric design.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables reliable change over between split knit and knit operations without additional movable pressers, reducing space requirements and improving operational efficiency by allowing direct pressure application to the slider, minimizing influence on the needle body and other components.
Implementation Method 1
a slider operating cam having a bifurcating portion for guiding the second butt of the slider and bifurcating a path of the slider
Implementation Method 2
a change over presser which is located at a position in the vicinity of the slider operating cam where the change over presser can press the first butt of the slider
Data Source
Figure 1
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Figure 4
AI summary
A flat knitting machine that can allow reliable selection on the path of a slider without a movable select presser for exclusive use in Split-knit being included in the pressers for pressing a butt of a select jack. When only a trailing Tuck presser 41a is put in the operative mode in position A and a Knit presser 23a is put in the inoperative mode, the selection between Knit provided by the needle selection related to position A and Split-knit provided by the needle selection related to position H can be made. When the Knit presser 23a is switched to the operative mode and also the leading Tuck presser 41b is put to the operative mode, the needle selection related to position H cannot allow the Split-knit, but can allow the selection of Tuck.