CN2496836Y

CN2496836Y - Fabric or film flat tentering roller

Info

Publication number: CN2496836Y
Application number: CN 01235305
Authority: CN
Inventors: 欧阳源兵; 李佳; 曾璐
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-06-11
Filing date: 2001-06-11
Publication date: 2002-06-26
Anticipated expiration: 2011-06-11

Abstract

A fabric or film full width expanding roller belongs to an improvement on the basis of the existing expanding roller, and is a change from a constant-pitch screw thread to a graded pitch screw thread; a graded change from a curved roller of the constant curvature to a curved roller of the graded curvature. The pitch of the screw thread expanding roller is from the center to the two sides with a pitch increase of 10 -100 percent; the expanding roller of the curved roller is from the center to the left side and the right side with the radius of curvature decreased by 1 -30 percent. Firstly, the design of the expanding aims to adapt to the moving process of the fabric and enables each part of the woof to receive uniform pull, thereby more effectively spreading the fabric or thin films and eliminating curled sides; secondly, the fabric or films is prevented from being pulled; thirdly, the existing expending roller can be replaced directly at the time of installation.

Description

Fabric or film open width spreading roll

Technical field

The utility model relates to a kind of with open width fabric or the even part that launches of film, refers to a kind of spreading roll especially.

Background technology

In the prior art, be used for that the part of open width fabric or film expansion is had two kinds: a kind of is the roller spreading roll, and this roller is to utilize the roll surface of iso-curvature roller to launch fabric or film, because roller curvature is constant, and the expanding poor effect; Another kind is the screw thread spreading roll, and it utilizes the screw thread of constant pitch to launch fabric or film, exists the expanding amount little, easily causes shortcomings such as crimping.Sometimes for strengthening the expanding effect, have to adopt many spreading rolls, or increase arc of contact, or increase the spreading roll rotating speed, but this causes fabric again or the suffered warp-wise pulling force of film is excessive and fabric or film middle part are stressed excessive and damage fabric or film.

Summary of the invention

The purpose of this utility model provides a kind ofly can more effectively launch fabric or film, and the impaired spreading roll in middle part in the time of can preventing fabric or film expanding is arranged.

The technical solution of the utility model is: improvement forms on the basis of existing roller spreading roll or screw thread spreading roll, and the pitch or the curvature of spreading roll gradually change to two from the centre.Make equal pitch thread into the gradient pitch screw thread, the screw thread spreading roll increases gradually from the centre to both sides pitch, and the amplification of pitch is 10%-100%.Change the roller of iso-curvature the roller of gradual change curvature into, its radius of curvature reduces 1%-30% to the roller spreading roll from the centre toward both sides, the left and right sides.

The utlity model has following good effect: gradient pitch screw thread spreading roll and gradual change curvature roller spreading roll one are the motion processes that is adapted to fabric, make parallel be subjected to uniform pulling force everywhere, can more effectively launch fabric or film and eliminate crimping; The 2nd, prevent that fabric or film from pulling; The 3rd, can directly replace existing spreading roll when installing.

Description of drawings

Fig. 1 is the state of kinematic motion scheme drawing of fabric on spreading roll;

Fig. 2 is a gradient pitch screw thread spreading roll scheme drawing;

Fig. 3 is a gradual change curvature roller spreading roll scheme drawing.

The specific embodiment

Below in conjunction with accompanying drawing the utility model is elaborated.

For ease of compare and describe the utility model with prior art, at first the state of kinematic motion on spreading roll is done an explanation to fabric or film, and Fig. 1 is the state of kinematic motion on spreading roll by expanding fabric or film (choosing a parallel).0 place is the spreading roll center of symmetry among the figure, and fabric or film launch to both sides herein, and source textile or film are as evenly creasing, and promptly former parallel is evenly crooked, on a 0-left side 1, and a left 1-left side 2, the 0-right side 1, the right 1-right side 2, the crape folding amount of each section parallel is Δ S.Obviously, in the expanding process, fabric or film are Δ S at the required amount of movement of particle at a left side 1, right 1 place, are 2 Δ S at a left side 2, the required amount of movement of right 2 place's particles, so extend to both sides, and the required amount of movement of fabric or film is in left and right sides edge maximum.And existing equal pitch thread spreading roll or iso-curvature roller spreading roll can not satisfy this requirement, will make in the middle of fabric or the film place stressed big and the left and right sides is stressed less.

When the expanding amount is too small (helical angle is too small or radius of curvature is excessive, or fabric and film and roll surface arc of contact are too small, or the relative velocity of fabric and film and roll surface is too small etc.), fabric and film can not launch fully, and fabric or film left and right sides edge easily curl.

(helical angle is excessive or radius of curvature is too small when the expanding amount is excessive, or fabric and film and roll surface arc of contact are excessive, or the relative velocity of fabric and film and roll surface is excessive etc.), fabric or film surface easily abrade, warp density inhomogeneous (centre is too sparse), even parallel breaks.

Fig. 2 is a gradient pitch screw thread spreading roll, and the pitch of screw thread spreading roll increases to both sides gradually from the centre, and to outer rim, the amplification of pitch is 1%-50% from the centre.

Fig. 3 is a gradual change curvature roller spreading roll, the radius of curvature maximum at place in the middle of the roller spreading roll, and the right and left radius of curvature diminishes gradually.To both sides, its radius of curvature reduces 1%-30% to roller from the middle part.

Claims

1, a kind of fabric or film open width spreading roll are to improve to form on the basis of existing spreading roll, and it is characterized in that: the pitch or the curvature of spreading roll gradually change to two from the centre.

2, fabric according to claim 1 or film open width spreading roll is characterized in that; The screw thread spreading roll from the centre to the left and right sides pitch increase gradually, the amplification of pitch is 10%-100%.

3, fabric according to claim 1 or film open width spreading roll is characterized in that: its radius of curvature reduces 1%-30% to the roller spreading roll from the centre toward both sides, the left and right sides.