A knife device for a hosiery machine

Abstract

This utility model discloses a knitting knife device for a sock knitting machine, including a knife holder and a knife mounted on a sinker. The knife holder has several air passages inside, each air passage outlet corresponding to a knife and connected to an air source to drive the knife. An electromagnetic valve is installed inside the air passage of the knife holder to control the on / off state of the air passage. This utility model directly sets the air valve controlling the on / off state of the air passage on the knife holder, and the distance between the valve and the knife is negligible. Therefore, the knife responds more sensitively and can meet the knitting needs of most terry loop patterns.

Description

Technical Field

[0001] This utility model belongs to the field of knitting machinery, specifically relating to sock knitting machines, and in particular to the knitting knife device of sock knitting machines. Background Technology

[0002] In the process of knitting socks, it is sometimes necessary to form loops on the inside of the sock, which are similar to a towel-like fabric structure. The essence of terry knitting is to prevent specific needles from participating in the knitting process within a single cylinder stroke. There are two existing methods for terry knitting: one using a terry cutter and the other using a needle selector. A terry cutter has an inclined plane that acts on the needle needle and moves in and out of the working position under cylinder control; a needle selector is electromagnetically controlled, controlling specific needles by the movement of the selector's blade. The difference between the two methods is that the terry cutter provides coarser control and cannot precisely control each needle, only allowing for continuous loop structures; while the needle selector can precisely control each needle, thus enabling the creation of so-called arbitrary loops. However, the disadvantages of the needle selector are its high price and short lifespan, which keeps the cost of terry knitting high.

[0003] For example, CN111519330A discloses a caster cover device for knitting machinery, including a caster cover housing. A needle selector is installed on the side of the caster cover housing. A left needle cutter control device is provided on one side of the needle selector, and a right needle cutter control device is provided on the other side. Looped inner and outer needle cutters are installed at the bottom of the caster cover housing. An elastic outer needle cutter, a left needle cutter, a left needle divider needle cutter, a right needle divider needle cutter, and a right needle cutter are sequentially installed within the annular structure between the inner and outer needle cutters. This device utilizes a needle selector to ensure the knitting speed, stability, and lifespan of the needle selector itself when knitting arbitrary terry structures. Simultaneously, through the left and right needle cutter control devices, the needle selector does not need to participate in needle selection when knitting half-terry or full-terry structures, thus greatly reducing the frequency of needle selector use and ensuring its lifespan. Furthermore, it is not constrained by the needle selection frequency of the needle selector, making the knitting speed and stability no different from conventional terry machines.

[0004] The aforementioned existing technology uses two terry loop knitting methods on the same machine, selecting one method based on design requirements. However, the advantages and disadvantages of each method still exist and have not been improved.

[0005] The applicant's research found that the reason why the knitting method of the knitting knife is not precise is that the knitting knife is pneumatically controlled, and the air valve is a certain distance away from the knitting knife. That is, the opening and closing of the air valve cannot be reflected in the movement of the knitting knife in real time, which causes the movement of the knitting knife to be lagging and cannot accurately control each knitting needle. Summary of the Invention

[0006] The purpose of this invention is to provide a knitting knife device for a sock knitting machine, which can have better terry knitting function.

[0007] The technical solution adopted by this utility model is as follows: a sock knives device, including a knives holder and a knives installed on a saddle cover, the knives holder has several air passages inside, each air passage outlet corresponds to a knives, and is connected to an air source to drive the knives; the feature is that: the air passages of the knives holder are equipped with solenoid valves to control the opening and closing of the air passages.

[0008] This invention places the air valve controlling the airflow directly on the knitting cutter holder. The distance between the air valve and the knitting cutter is negligible, resulting in a more sensitive response from the cutter. In practical testing, this invention can control the cutter's movement to within four needles. While it cannot precisely control every single needle, it is sufficient for most pattern requirements. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the structure of this utility model. Detailed Implementation

[0010] See the attached diagram. This embodiment includes a spinning cover 1 and a syringe 2. Knitting needles are arranged on the outer circumference of the syringe 2, moving up and down to perform knitting. Two knitting knife holders 3 are installed on the spinning cover 1, each with three knitting knives 4. The knitting knife holder has an air passage connected to an air source, driving the knitting knives 4 forward into the working position. A solenoid valve 5 is also provided inside the knitting knife holder to control the opening and closing of its internal air passage.

[0011] When solenoid valve 5 receives an electrical signal, the air circuit is connected, and high-pressure air drives the knives 4 into the working position; when the solenoid valve receives a signal to close, the air pressure disappears, and the knives 4 return to the non-working position under the action of the reset mechanism. In this way, the action of the knives can be controlled relatively sensitively to complete the loop weaving.

Claims

1. A burr cutter device for a sock knives, comprising a burr cutter holder and a burr cutter mounted on a sinker cover, wherein the burr cutter holder has a plurality of air passages inside, each air passage outlet corresponding to a burr cutter, and connected to an air source to drive the burr cutter; characterized in that: The air passage inside the hair cutter seat is provided with an electromagnetic valve for controlling the air passage on-off.

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