Circular Knitting Machine Movable Stitch Cam
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Solution Overview
Problem
Existing circular knitting machines face limitations in managing the position of the stitch cam independently of other dial assembly devices, restricting flexibility in stitch formation and yarn sucking accuracy, which affects knitting quality and reliability.
Innovation Solution
A circular knitting machine with a movable stitch cam system that can be positioned along a circular trajectory, allowing for synchronous, delayed, or advanced movements relative to the cylinder needles, enabling independent control of the stitch cam without affecting other dial assembly devices, using a motor-driven mechanism to adjust the cam's position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the stitch cam is fixed in position relative to other dial assembly devices, then the structure is simpler and more reliable, but the flexibility in stitch formation and yarn sucking accuracy is restricted
Solution Approach 1:
The dial assembly is segmented into two independent systems: a stationary support ring and a movable stitch cam system. The stitch cam can be independently positioned relative to the support ring, allowing flexible stitch formation while maintaining a simple overall structure. This segmentation enables the stitch cam to be adjusted without affecting other dial assembly devices.
Solution Approach 2:
The stitch cam is made dynamically adjustable along the circular trajectory, transitioning from a fixed position to a movable one. This dynamic capability allows the stitch cam to be positioned in synchronous, delayed, or advanced positions relative to cylinder needles, providing flexibility in stitch formation while maintaining structural simplicity through controlled movement.
2Manufacturing precision
If the stitch cam position is fixed relative to the cam profile, then the device structure is simpler, but the accuracy of yarn sucking and knitting quality are affected
Solution Approach 1:
The cam system is segmented into a stationary support ring with cam profile and a movable stitch cam. This separation allows the stitch cam to be independently positioned to achieve precise yarn sucking timing without complicating the overall cam system structure. The stitch cam can be adjusted to optimal positions for accurate yarn sucking while maintaining a simple support structure.
3Adaptability or versatility
If the stitch cam can be independently positioned, then the flexibility in stitch formation is improved, but the device complexity increases
Solution Approach 1:
The stitch cam is designed with controlled dynamic movement along a predefined circular trajectory, allowing independent positioning in synchronous, delayed, or advanced positions. This dynamic capability provides flexible independent control while maintaining relative structural simplicity through constrained motion paths and standardized positioning mechanisms.
Data Source
AI summary
A circular knitting machine for knitted items, comprising: a supporting structure; a needle-holding cylinder selectively turnable and provided with a plurality of cylinder needles; and a dial assembly. The dial assembly includes a supporting ring integral with the supporting structure; a needle-holding plate turnably mounted to the supporting ring; a plurality of plate needles; a plurality of control cams which interact with the plate needles to transmit to them a radial movement inside the respective sliding seat, wherein the control cams globally form a cam profile. The dial assembly includes a stitch cam placed movably on the supporting ring and interacting with the plate needles in a given angular sector during the rotation of the needle-holding plate, so as to transmit to the plate needles a motion of return for executing stitch formation. The stitch cam is selectively movable with respect to the cam profile.