CN2466178Y

CN2466178Y - Plastic film spreading roll

Info

Publication number: CN2466178Y
Application number: CN 01214802
Authority: CN
Inventors: 马镇鑫
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-01-02
Filing date: 2001-01-02
Publication date: 2001-12-19
Anticipated expiration: 2011-01-02

Abstract

The utility model relates to a plastic film spreading device, which is mainly characterized in that the outer surface of a roller is evenly overspread with elastic projections (1); the projections (1) are respectively inclined towards the direction of both wings using a central line of the cambered surface of the roller as the boundary. The spreading roller can effectively and stably carry out spreading for plastic films. The utility model can ensure films which are rolled by the utility model not to generate wrinkle.

Description

A kind of novel plastic film nip rolls

The utility model relates to a kind of plastic film nip rolls.

Before plastic film winding, need to make film stretch to both wings by nip rolls, tighten, in order to avoid the film surface produces fold during rolling, influence the rolling quality and the aesthetic appearance of film, adopted the arch nip rolls to stretch mostly in the past, owing to arch rollers is that the arch face that utilizes film to contact with it makes film be subjected to the effect of arch face to produce the purpose that reaches the flattening film from the sliding motion of mediad two spanes at the volley, yet, the exhibition sliding movement is based on the caused by relative motion of film and arch face, if the arch face smoothness is not enough, perhaps the arch face cleannes are not enough, then open up sliding movement and increase with regard to coefficient of friction and produce inhomogeneously, even have a strong impact on the flattening effect owing to the not flat spot of many parts.

The purpose of this utility model is to provide a kind of flattening effect stable, effective plastic film nip rolls.

The utility model is achieved in that a kind of novel nip rolls, it is characterized in that: the outer surface of roller evenly is covered with elastic bumps (1), projection (1) is that tiltedly upright [root with projection (1) serves as a little to do the tangent plane of roller cambered surface to the both wings direction respectively on the boundary with roller cambered surface center line, the center line of projection (1) and the angle on this plane are not equal to 90 °], the projection (1) be elastomeric material (for example: projection rubber), its flexible intensity can produce appropriate deformation to its compressing at the volley with plastic film and be advisable, because projection (1) is tiltedly upright to both wings, when its pressurized deformation, must topple over to the both wings appropriateness, make film integral body to the both wings stretched taught, the angular dimension that the dynamics of stretching, extension is toppled on projection (1) is decided.Because in film contacts, each projection (1) all stably is adjacent to film, does not produce relative displacement between them, therefore, its extensional process can not flatten effect because of the small out-of-flatness or low slightly influence of cleannes on projection (1) set plane.In the process of roller rotational motion, the projection on the compression face (1) resets after film breaks away from film, and with the rotation of roller, when they enter in the compression face once more, plays the flattening effect once more, Zhou Erfu this, the flattening effect is carried out continuously.

The utility model can be perfect like this: the lower vertical of projection (1) is in the cambered surface of roller, the projection (1) of cambered surface center line scope is perpendicular to cambered surface, (perpendicular to the tangent plane of the cambered surface at root place,) all the top of projection (1) on same cambered surface, projection (1) stands on flexible overlays (2) single face, the another side of veneer (2) amplexiforms on the surface of rigid roller (3), and from the mediad both wings, the tiltedly upright angle of projection (1) increases gradually.The root of projection (1) can increase the elasticity of projection (1) perpendicular to the cambered surface of roller, strengthens the effect of tightening; Projection on the center line (1) plays a kind of balanced action of datum line perpendicular to cambered surface, and it is that the benchmark balance is launched that the flattening of both wings is done in order to center line; All the top of projection (1) can evenly entirely hold up the integral body of film on same cambered surface, makes film still keep even curface under the pressurized situation, can not produce local distortion; Because projection (1) must have the pressurized deformation elasticity of an appropriateness, therefore can not make of rigid material, but roller itself requires enough rigidity, in order to avoid the integral body of roller is out of shape under pressured state, therefore, can adopt on the surface of rigid roller applying outer surface to be furnished with the structure of the elastomeric material veneer of projection (1), satisfy nip rolls rigidity and flexible double requirements simultaneously.From the mediad both wings, the tiltedly upright angle of projection (1) can increase gradually, and like this, adjacent two projectioies (1) all can produce the stretching, extension benefit in the process of deformation, thereby makes the integral body of film produce the uniform effect that flattens.

The utility model is that the roller surface configuration that the boundary is tiltedly stood to the both wings direction has guaranteed validity and the stability that roller flattens film owing to having adopted the roller surface to be covered with elastic bumps (1) and having made protruding (1) with roller cambered surface center line, be equipped with the different shape of and set individual and the double-decker of roller again, the complete expansion effect that improves roller integral body effectively to projection (1).

Fig. 1, a kind of nip rolls surface configuration schematic diagram of the present utility model.

Fig. 2, the structural representation of another kind of nip rolls of the present utility model.

Fig. 3, the structural representation of first kind of nip rolls of the present utility model.

Embodiment 1:

See Fig. 1, the projection (1) on the cambered surface center line of roller surface is vertical with cambered surface, and to the projection (1) of two side direction Boulezs, its root cambered surface is vertical, and top then tilts to both wings respectively; And along with the cloth column direction, the angle of inclination on each projection (1) top slowly increases, and all the planar top of projection (1) is all tangent with same cambered surface; The material of roller is a rubber.

Embodiment 2:

See Fig. 2, exposed face is covered with projection (1), and the inside is the rubber veneer (2) on plane, is affixed to roller (3) surface of steel with viscose glue, and remaining is identical with embodiment (1).

Embodiment 3:

See Fig. 3, rubber veneer (2) is the cover tubular, and on the bowed roller (4) of steel, the some equally distributed bearings of suit (5) constitute roller (3) jointly, and roller (3) cover is through in the central passage of veneer (2).Because the soft elasticity of rubber veneer cover, drives it and rotates under the support of bearing (5) when its surface is moved at film, roller (4) plays the stationary positioned effect, does not rotate, and remaining is identical with embodiment 2.

Claims

1, a kind of novel nip rolls is characterized in that: the outer surface of roller evenly is covered with elastic bumps (1), and projection (1) is that the boundary is tiltedly upright to the both wings direction respectively with roller cambered surface center line.

2, nip rolls according to claim 1 is characterized in that: the lower vertical of projection (1) is in the cambered surface of roller.

3, nip rolls according to claim 1 and 2 is characterized in that: the projection (1) of cambered surface center line scope is perpendicular to cambered surface.

4, nip rolls according to claim 3: it is characterized in that: all the top of projection (1) is on same cambered surface.

5, nip rolls according to claim 1 and 2 is characterized in that: projection (1) stands on flexible overlays (2) single face, and the another side of veneer (2) amplexiforms the surface in rigid roller (3).

6, nip rolls according to claim 1 and 2 is characterized in that: from the mediad both wings, the tiltedly upright angle of projection (1) increases gradually.

7, nip rolls according to claim 5, it is characterized in that: veneer (2) is the middle cover tubular that passage is arranged, roller (3) is gone up cover for arcuation rigid roller frame (4) and is coated with some equally distributed bearings (5), and roller (3) cover is installed in veneer (2) center-aisle.