A self-lubricating needle plate for a circular knitting machine
Patent Information
- Application Number
- CN202522438777.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-18
- Publication Date
- 2026-09-25
- Estimated Expiration
- 2035-11-18
AI Technical Summary
[0006]针对上述存在的技术问题，本实用新型提供了一种针织圆机自润滑上针盘，以解决现有大圆机上针盘存在润滑油污染和磨损的问题，该针织圆机自润滑上针盘能够避免润滑油的使用，同时也便于降低更换成本
[0010]本针织圆机自润滑上针盘通过在导向槽底部的安装凹槽内设置自润滑树脂件，利用树脂件自身的自润滑特性，替代传统金属部件间依赖润滑油减摩的方式，避免了润滑油在高速编织过程中因离心力飞溅或粘附织针而污染针织物的问题，省去后续清洗工序，降低生产总成本，同时保障针织物染色均匀性与成品品质，减少因油污导致的次品率。自润滑树脂件采用可拆卸嵌装结构，当树脂件因长期使用出现磨损时，无需像传统上针盘那样整体更换，仅需单独拆卸更换磨损的自润滑树脂件即可。该设计大幅降低了部件更换成本，同时缩短维护时间，减少因设备停机带来的生产损失，提升针织圆机的生产效率与经济性。
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Figure CN224799086U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of textile equipment technology, specifically relating to a self-lubricating needle plate for a circular knitting machine. Background Technology
[0002] As a core production equipment in the knitting industry, the efficiency and product quality of circular knitting machines directly depend on the precision of the fit and the stability of their key components. Among them, the upper needle plate, as the core component guiding the knitting needles to achieve reciprocating motion, constrains the movement trajectory of the knitting needles through its annularly distributed guide groove structure, ensuring that the knitting needles complete the loop formation according to the preset pattern. This is crucial for ensuring the uniform texture and consistent density of the knitted fabric.
[0003] Currently, the needle plate and knitting needles of circular knitting machines are generally made of metal. For example, the needle plate is often made of wear-resistant metals such as alloy steel and cast iron, while the knitting needles are often made of high-carbon steel and stainless steel to meet the structural strength requirements during reciprocating motion. In actual operation, the knitting needles need to slide back and forth in the guide groove at high frequency, and the direct contact between metals inevitably generates frictional wear. With the extension of use time, the inner wall of the guide groove is prone to wear, scratches, deformation, and other problems. The surface roughness of the knitting needle body will also increase due to friction, which will lead to phenomena such as motion jamming, increased noise, and even breakage of the knitting needles in severe cases, directly affecting the continuity of production and the product qualification rate.
[0004] To alleviate friction and wear between metal parts, existing technologies typically employ the method of periodically adding lubricating oil. This forms an oil film on the contact surface between the guide groove and the knitting needle, reducing the coefficient of friction. However, the use of lubricating oil introduces new technical drawbacks: Firstly, during high-speed knitting, the lubricating oil is prone to splashing due to centrifugal force or adhering to the surface of the knitted fabric due to the reciprocating motion of the knitting needle, resulting in oil stains. This not only increases the cost of subsequent cleaning processes but may also affect the dyeing uniformity and finished product quality due to incomplete cleaning. Secondly, after long-term use, the lubricating oil gradually ages and deteriorates, producing sludge and other impurities that accumulate inside the guide groove, which in turn exacerbates the wear between the knitting needle and the guide groove, creating a vicious cycle.
[0005] Furthermore, as a precision mechanical component, the machining accuracy of the guide groove of the upper needle plate directly determines the stability of the knitting needle movement. Therefore, the manufacturing process of the upper needle plate is complex and costly. When the guide groove is severely worn, due to the interconnectedness of the overall structure of the upper needle plate, it is impossible to repair the guide groove alone; the entire upper needle plate must be replaced. This not only increases the maintenance cost of the equipment but also causes production interruptions and reduces production efficiency due to component replacement. Utility Model Content
[0006] To address the aforementioned technical problems, this utility model provides a self-lubricating needle plate for a circular knitting machine, which solves the problems of lubricant contamination and wear in existing circular knitting machine needle plates. This self-lubricating needle plate can avoid the use of lubricating oil and also facilitates the reduction of replacement costs.
[0007] This utility model discloses a self-lubricating upper needle plate for a circular knitting machine, comprising a disc-shaped upper needle plate body and a plurality of knitting needles adapted to the knitting action of the circular knitting machine. The upper surface of the upper needle plate body is provided with a plurality of guide grooves evenly spaced along its circumference for guiding the reciprocating sliding of the knitting needles. The length direction of the guide groove is consistent with the radial direction of the upper needle plate body, and the bottom of each guide groove is provided with a rectangular mounting groove. A self-lubricating resin component is detachably embedded in the mounting groove. The upper surface of the self-lubricating resin component and the inner walls of both sides of the guide groove together form a knitting needle sliding channel. The lower end of the knitting needle is adapted to be embedded in the knitting needle sliding channel, and the bottom surface of the lower end of the knitting needle maintains a surface contact sliding fit with the upper surface of the self-lubricating resin component.
[0008] Furthermore, the self-lubricating resin part is provided with positioning protrusions at both ends, and the guide groove is provided with positioning grooves at both ends, and the positioning protrusions and positioning grooves are engaged with each other.
[0009] Furthermore, the self-lubricating resin component is a polytetrafluoroethylene component.
[0010] This circular knitting machine's self-lubricating needle plate utilizes a self-lubricating resin component installed in a mounting groove at the bottom of the guide slot. This resin component's self-lubricating properties replace the traditional method of relying on lubricating oil to reduce friction between metal parts. This avoids the problem of lubricating oil splashing or adhering to the needles during high-speed knitting, thus preventing contamination of the knitted fabric. This eliminates the need for subsequent cleaning processes, reducing overall production costs. Simultaneously, it ensures uniform dyeing of the knitted fabric and the quality of the finished product, reducing the defect rate caused by oil contamination. The self-lubricating resin component features a detachable, embedded structure. When the resin component wears down due to long-term use, it does not need to be replaced entirely like a traditional needle plate; only the worn self-lubricating resin component needs to be removed and replaced. This design significantly reduces component replacement costs, shortens maintenance time, reduces production losses due to equipment downtime, and improves the production efficiency and economy of the circular knitting machine. Attached Figure Description
[0011] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0012] Figure 1 This is a schematic diagram of the structure of a self-lubricating upper needle plate of a circular knitting machine. Detailed Implementation
[0013] This utility model discloses a self-lubricating needle plate for a circular knitting machine. This self-lubricating needle plate can avoid the use of lubricating oil and also facilitates the reduction of replacement costs.
[0014] The technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, what is described is only a part of the embodiments of this utility model, and not all of the embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.
[0015] See Figure 1 As shown, this utility model discloses a self-lubricating upper needle plate for a circular knitting machine, including a disc-shaped upper needle plate body 1 and a plurality of knitting needles 4 adapted to the knitting action of the circular knitting machine. The upper surface of the upper needle plate body 1 is evenly spaced with a plurality of guide grooves 5 for guiding the reciprocating sliding of the knitting needles 4 along its circumference. The length direction of the guide grooves 5 is consistent with the radial direction of the upper needle plate body 1, and the bottom of each guide groove 5 is provided with a rectangular mounting groove. A self-lubricating resin component 6 is detachably embedded in the mounting groove. The upper surface of the self-lubricating resin component 6 and the inner walls of both sides of the guide groove 5 together form a sliding channel for the knitting needles 4. The lower end of the knitting needles 4 is adapted to be embedded in the sliding channel of the knitting needles 4, and the bottom surface of the lower end of the knitting needles 4 maintains a surface contact sliding fit with the upper surface of the self-lubricating resin component 6.
[0016] This circular knitting machine's self-lubricating needle plate utilizes a self-lubricating resin component 6 installed in the mounting groove at the bottom of the guide slot 5. This self-lubricating property of the resin component replaces the traditional method of relying on lubricating oil to reduce friction between metal parts. It avoids the problem of lubricating oil splashing or adhering to the knitting needles 4 during high-speed knitting, thus contaminating the knitted fabric. This eliminates the need for subsequent cleaning processes, reducing overall production costs. Simultaneously, it ensures uniform dyeing of the knitted fabric and the quality of the finished product, reducing the defect rate caused by oil contamination. The self-lubricating resin component 6 adopts a detachable, embedded structure. When the resin component wears down due to long-term use, it does not need to be replaced entirely like a traditional needle plate; only the worn self-lubricating resin component 6 needs to be removed and replaced. This design significantly reduces component replacement costs, shortens maintenance time, reduces production losses due to equipment downtime, and improves the production efficiency and economy of the circular knitting machine.
[0017] The self-lubricating resin part 6 is provided with positioning protrusions 3 at both ends, and the guide groove 5 is provided with positioning grooves 2 at both ends, and the positioning protrusions 3 and positioning grooves 2 are engaged with each other.
[0018] The engagement between the positioning protrusion 3 and the positioning groove 2 effectively restricts the axial and radial displacement of the self-lubricating resin part 6 in the guide groove 5, preventing the resin part from shifting or loosening due to force during the high-frequency reciprocating sliding of the needle 4. This ensures that the needle 4 always moves stably within the preset sliding channel, avoiding the needle 4 from jamming or deviating from its movement trajectory due to the offset of the resin part, and further ensuring the stability of equipment operation and fabric quality.
[0019] The self-lubricating resin component 6 is a polytetrafluoroethylene component.
[0020] Polytetrafluoroethylene (PTFE), as a typical high-performance self-lubricating material, possesses an extremely low coefficient of friction (only about 0.04, far lower than the coefficient of friction between metals) and excellent wear resistance. Furthermore, its self-lubricating properties remain stable during long-term use and are not easily diminished by changes in temperature and pressure. Using PTFE components can further reduce frictional wear between the knitting needles and resin components, extend the replacement cycle of the resin components, reduce maintenance frequency, and simultaneously avoid the risk of resin component wear debris contaminating equipment or fabric.
[0021] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the protection scope of the present invention.
Claims
1. A self-lubricating needle plate for a circular knitting machine, characterized in that, The device includes a disc-shaped upper needle plate body and multiple knitting needles adapted to the knitting action of a circular knitting machine. The upper surface of the upper needle plate body has multiple guide grooves evenly spaced along its circumference to guide the reciprocating sliding of the knitting needles. The length direction of the guide grooves is consistent with the radial direction of the upper needle plate body, and the bottom of each guide groove has a rectangular mounting groove. A self-lubricating resin component is detachably embedded in the mounting groove. The upper surface of the self-lubricating resin component and the inner walls of both sides of the guide groove together form a knitting needle sliding channel. The lower end of the knitting needle is adapted to be embedded in the knitting needle sliding channel, and the bottom surface of the lower end of the knitting needle maintains a surface contact sliding fit with the upper surface of the self-lubricating resin component.
2. The self-lubricating needle plate of the circular knitting machine according to claim 1, characterized in that, The self-lubricating resin part has positioning protrusions at both ends, and the guide groove has positioning grooves at both ends, with the positioning protrusions engaging with the positioning grooves.
3. The self-lubricating needle plate of the circular knitting machine according to claim 1, characterized in that, The self-lubricating resin component is a polytetrafluoroethylene component.