CN2755134Y

CN2755134Y - High-efficient nonwoven needle

Info

Publication number: CN2755134Y
Application number: CNU2004201107296U
Authority: CN
Inventors: 王彬; 王幼农; 王笑农
Original assignee: Individual
Current assignee: Taizhou Youngdragon Make Needle Co Ltd
Priority date: 2004-12-02
Filing date: 2004-12-02
Publication date: 2006-02-01
Anticipated expiration: 2014-12-02

Abstract

The utility model relates to a long-life non-woven needle, which is composed of an integrally-made needle bar, a middle needle bar and a triangular needle body which is made into a hook shape, wherein at least one surface of the tooth space surfaces and the undercut edged surfaces of the tooth space surface of each hooked spine of the hooked spine needle body is a convex arc surface. Because the tooth space surfaces and the undercut edged surfaces of the hooked spines of the non-woven needle are made into smooth arc surfaces, the utility model avoids the problem of the original triangular-section tooth shape that fibers are easy to be cut off and are short in service life. Because the tooth shape of the utility model is in an arc shape, the utility model has the obvious advantages that the smooth arc surfaces disperse mechanical stress, relatively reduces needle breaking rate, lengthens service life, enhances the quality of the non-woven clothes and the production efficiency, etc.

Description

Efficient nonwoven pin

Technical field:

The utility model relates to the improvement of nonwoven pin.

Background technology:

The nonwoven pin is the special needle of producing nonwoven fabric, is made into integration for three sections by triangular hook pricker, middle shank, shank, is shaped on a plurality of hook thorns on each rib of needle body.It entwines fiber mutually with the puncture up and down at a high speed on fiber web layer of intensive pin, forms various nonwoven fabric.Traditional flute profile (hook thorn) has following distinct disadvantage:

1, flute profile is the cutter excision forming by scalpriform, and two limits of triangular facet of entrance angle all were sharp sword limits under the needle tray face reached.When pin when doing to puncture at a high speed, the very easy fiber that cuts off has a strong impact on drawing of nonwoven fabric and dials intensity;

2, tooth prominent (height of perk) can make the aperture of pin trace increase, and influences the surface quality of nonwoven fabric;

3, the acute angle of following entrance angle, mechanical stress concentration the top of the horn, pin frangibility.The pin that fractures continues the surface of puncture meeting heavy damage cloth, influences the quality of nonwoven fabric; Pin produces static and particulate can be adsorbed on the top of the horn when puncturing at a high speed, forms granule, and pin is the meeting hole diameter enlargement when puncture, and also easy broken needle destroys layer of cloth.Because need often to shut down to change pin, production efficiency is lower.

Summary of the invention:

But the purpose of this utility model provides a kind of significant prolongation service life, improves the nonwoven pin of non-woven fabrics quality.

The utility model is formed by being made into integration shank, middle shank and triangular hook pricker, it is characterized in that it is convex globoidal that the alveolar surface of each hook thorn in the hook pricker and incision edged surface have a face at least.Undercut angles θ is 20 °-25 °.It is prominent that briar tooth is anodontia.

The utility model is owing to make smooth cambered surface with the alveolar surface and the incision edged surface of nonwoven pinhock thorn.Pin is when puncturing up and down, fiber is under the flute profile guiding, be deposited in middle bottom, in the wearing and tearing of the middle and lower part of tooth, the flank of tooth weares and teares synchronously like this, and the angle that keeps relative stability can be brought into play the good mao performance of colluding all the time, avoiding the flute profile cross section is very fast one-tenth easy to wear obtuse angle, top that triangular facet brings and can't link the problem of fiber, the service life of extension pin.Because alveolar surface increases, the undercut angles top is an arc surface, and the very easy disengaging teeth groove of particulate is avoided forming granule and influenced puncture, significantly reduces the probability that pin fractures simultaneously, thereby has also avoided broken needle to destroy the phenomenon of cloth laminar surface; Because the flank of tooth is an arc surface, disperseed mechanical stress, the corresponding broken needle rate that also reduced avoids broken needle to destroy layer of cloth.The arc surface of teeth groove constitutes the reinforcement effect simultaneously, strengthens the rigidity and the toughness of pin, reduces the rate that fractures.Undercut angles increases to 20 °-50 °, increases the band fibre weight.Because the flute profile design has above obvious advantage on geometry, so strengthening flute profile nonwoven pin, circular arc avoids damaging fiber than traditional flute profile nonwoven pin, reduce broken needle, increase the service life, the quality of raising nonwoven fabric and production efficiency etc. are advantage obviously.

Description of drawings:

Fig. 1 is nonwoven aciculiform shape figure.

Fig. 2 is the local amplification plan view in K place among Fig. 1.

Fig. 3 is an A-A sectional view among Fig. 2

Fig. 4 is the oblique upward view of Fig. 2.

The specific embodiment:

With reference to Fig. 1, the nonwoven pin is made into integration for three sections by triangular hook pricker 3, middle shank B, shank C, is shaped on a plurality of hook thorns on each rib of needle body 3.

With reference to Fig. 2, Fig. 3, Fig. 4, each hook thorn has alveolar surface 1, briar tooth 2 and incision edged surface 4 on the needle body 3, and wherein alveolar surface 1 and incision edged surface 4 are made convex arc surface.Undercut angles θ is between 20 °-25 °.Briar tooth 2 is anodontia prominent, does not promptly have to upwarp, and utilizes fiber self elasticity to enter in the briar tooth automatically during work.

Nonwoven pin intensity, hardness require very high, because the needle body volume is less, the height of triangular hook pricker section triangle is according to different size, only between 0.5～2.45mm, therefore manufacture difficulty is bigger, and the applicant trial-produces the utility model successfully finally through making great efforts for many years.After tested, HV620～686～(HRC56.6～59), metallographic structure is latent acicular martensite of tempering and more fine particle carbide, no decarburized layer; Improved the toughness of pin; Surface carburization is handled, and has improved case hardness and anti-wear performance.

Claims

1, a kind of efficient nonwoven pin is formed by being made into integration shank (C), middle shank (B) and triangular hook system needle body (3), it is characterized in that it is convex globoidal that the alveolar surface (1) of each hook thorn in the hook pricker (3) and incision edged surface (4) have a face at least.

2, nonwoven pin according to claim 1 is characterized in that undercut angles θ is 20 °-25 °.

3, nonwoven pin according to claim 2 is characterized in that briar tooth (2) is anodontia prominent.