WO2016058399A1

WO2016058399A1 - Pressure roller and manufacturing method therefor

Info

Publication number: WO2016058399A1
Application number: PCT/CN2015/081303
Authority: WO
Inventors: 钟洲
Original assignee: 圣欧芳纶（江苏）股份有限公司
Priority date: 2014-10-14
Filing date: 2015-06-12
Publication date: 2016-04-21
Also published as: JP2017500521A; CN104385563A; KR20160101148A

Abstract

The present invention discloses a pressure roller and a manufacturing method therefor. The main features are comprising a central shaft, a cylinder, and flat plates which are provided with a fixing device having a slot and are connected on two ends of the cylinder, wherein a layer of high-temperature-resistant and heat-insulating material is provided on the surface of the central shaft, and the cylinder is formed of a lot of ring-shaped poly-m-phenyleneisophthalamide (MPIA) paper, which has the same area, has a hole in the centre, is sleeved on the central shaft and overlapped in a radial direction. The beneficial effects of the present invention are that the cylinder of MPIA paper sleeve is able to resist wearing, high temperature and aging, is stable in size and the density thereof is smaller than metal, and the inertia reduces when operating such that the machining accuracy is highly improved.

Description

Pressure roller and preparation method thereof

Technical field

The invention relates to a pressure roller and a preparation method thereof.

Background technique

With the development of economy and technology, many industries such as LCD protective film, printed circuit board, paper, plastic, etc. have been greatly developed. The materials of these industries need to use a pressure roller and a heating roller to achieve the surface of the material. Flatness, the existing pressure roller is mainly made of alloys such as iron or steel. The pressure roller of this metal material has almost no resistance to frictional mechanical action, so the wear resistance is poor; the hardness of alloys such as iron or steel is too large. No toughness, so can not slow down the pressure of the surface of the roller body; under high temperature conditions, creep easily occurs, resulting in deformation, surface softening, and even melting, so it is not resistant to high temperature, dimensional stability is poor, and the density of iron or steel is large. At high speeds, the inertia is large and it is easy to sway, which affects the machining accuracy.

In order to solve the above problems, Chinese patents CN201220340814.6 and CN201020217584.5 both relate to a pressure roller having a wear-resistant layer on the surface of a metal roll body, wherein CN201220340814.6 provides a layer of compound glue added on the surface of the metal roll body. The pressure roller of the layer solves the problem of poor wear resistance and non-toughness of the surface of the traditional metal pressure roller, but the composite rubber layer is not resistant to high temperature and cannot be used in industries such as film and plastic which need heating. CN201020217584.5 discloses a base layer of seamless aluminum tube, a silica gel and a pressure roller coated with Teflon on the surface. The pressure roller has a complicated structure, high cost and may be thick or thin when spraying a Teflon layer. The phenomenon of uniformity cannot be used for PET film (English name: polyethylene terephthlalate, abbreviated as PET) and ARM film (PET surface treated film), and the above patents all adopt iron roller body. Not only is the quality heavy, handling and loading and unloading are inconvenient, and it is easily deformed by heat. During operation, the inertia is large and the swing amplitude is large, which affects the flatness of the surface of the processed film.

The present invention is directed to a pressure roller of a new material to overcome the problems of the prior art and to guide the inventive concept.

Summary of the invention

In order to overcome the deficiencies of the prior art, it is an object of the invention to provide a pressure roller. The pressure roller produced by the invention has the advantages of simple structure, light weight, wear resistance, high temperature resistance, aging resistance and good dimensional stability.

The object of the present invention is achieved by the following technical solutions:

A pressure roller comprising a roller body and a central shaft, characterized in that: the pressure roller comprises a roller body and a central shaft disposed on the roller body, the roller body comprises a cylinder body and is connected at two ends of the cylinder body A metal plate fixing device which is formed by stacking a plurality of layers of paper having the same area.

As a further improvement of the present invention, the fixing device is a metal plate fixing device. The metal plate fixing device is made of iron or copper.

Further, the paper is natural wood pulp paper or polyimide paper (PI), polyparaphenylene benzoxazole paper (PBO), para-aramid paper (PPTA) or meta-aramid paper. (PMIA) synthetic fiber paper. Preferred papers are meta-aramid paper (PMIA) and para-aramid paper (PPTA).

Further, the shape of the aramid paper is a ring with a hole in the center, and the diameter of the center hole is slightly larger than or equal to the outer diameter of the central axis.

Further, the aramid paper has a thickness of 0.02 to 0.80 mm and a diameter of 200 to 1000 mm.

Further, the aramid paper has a thickness of 0.05 to 0.58 mm and a diameter of 400 to 700 mm.

Further, the surface of the central shaft is plated with a layer of heat resistant material.

Further, the length of the barrel is greater than 0.5 meters.

Further, the aramid paper has a pressure roller density of 1.3-1.8 g/mm ³ , preferably 1.4-1.6 g/mm ³ ;

The above technical solution can be further improved by the following measures. First, the annular aramid paper is layered on the central axis, and the electromagnetic heating plate is pressed on the two ends of the central shaft to heat the tablet. Applying a dynamic pressure of 1.5-2.5t intermittently on the tablet, stacking the aramid paper together, when the appropriate density is reached, stop the dynamic pressure and apply a static pressure of more than 24h, 0.5-1.5t. The aramid paper is composited into a seamless cylinder. Then, the flat plate electromagnetic heating sheet is removed and replaced with a metal flat plate fixing device to obtain an aramid paper pressure roller. The preferred intermittent applied dynamic pressure is 1.8-2.5t and the static pressure is 0.8-1.2t. The diameter of the central axis is 30-450mm reported in the literature, and the material is steel and its alloy or copper or iron.

The beneficial effects of the invention are:

(1) The pressure roller has a simple and easy structure, long service life and convenient transportation;

(2) The cylinder of aramid paper has high temperature resistance, aging resistance, good dimensional stability, and light density is lighter than metal, and the inertia is reduced during exercise, which greatly improves the precision of the processed product. The pressure roller provided is simple in structure, light in weight, convenient for transportation and loading and unloading. Polyethylene terephthalate film (English name: polyethylene terephthlalate, abbreviation: PET) and ARM film (PET surface treated film) and new brush circuit for LCD screens for mobile phones, computers and TVs Large-scale production of films such as plates.

(3) The high temperature resistant heat insulating material on the surface of the central shaft further strengthens the flame retardancy of the pressure roller and prolongs the service life.

(4) The length of the cylinder is more than 0.5 m, and the mechanical performance and stability of the pressure roller are also enhanced while ensuring better use effect.

DRAWINGS

Figure 1 is a schematic view showing the structure of a pressure roller of the present invention; wherein: 1. a central shaft; 2. a cylinder; 3. a metal plate fixing device; 4. a high temperature resistant heat insulating layer.

detailed description

The technical solutions of the present invention will be described in detail below through specific embodiments.

The pressure roller of the present invention shown in Fig. 1 is composed of a central portion 1 and a roller body. The roller body is composed of a cylinder 2 and a fixing device 3 at both ends of the cylinder. The cylinder 2 is a cylinder composed of aramid paper. The preferred aramid paper is meta-aramid paper. The preferred aramid paper has a circular shape with a center hole. The diameter of the annular center hole is greater than or equal to the outer diameter of the central axis. More preferably, the metal plate fixing device is The annular metal plate is provided with a slot, and the material of the annular metal plate is preferably iron or copper; preferably, the central shaft surface of the pressure roller is plated with a high temperature resistant heat insulating material 4, preferably the length of the cylinder It is greater than 0.5m.

The reason for the selection of meta-aramid paper is that the most prominent feature of meta-aramid is that it has good high temperature resistance and can be used for a long time at 220 °C without aging. Its electrical and mechanical properties can be maintained for 10 years without aging. Moreover, the dimensional stability is excellent, the heat shrinkage rate is only 1% at about 250 ° C, and it does not shrink, embrittle, soften or melt when exposed to 300 ° C for a short time, and the density of meta-aramid paper is only 1/6 of iron, so the same volume of the roller body, the quality of meta-aramid paper is only 1/6 of that of iron.

The aramid paper cylinder referred to in the present invention refers to a cylinder made of aramid paper. The aramid paper refers to a high-performance insulating material, and the material of the cylinder is selected as a meta-position. Aramid paper is a preferred embodiment, if other forms of paper, such as the paper is natural wood pulp paper or polyimide paper, polyparaphenylene benzoxazole paper, para-aramid paper, etc. It is within the scope of the invention to achieve the object of the invention.

Example 1

A surface of the central shaft is coated with a high temperature resistant insulating material (this step is accomplished by methods well known to those skilled in the art, the insulating material is also prior art, which is not further described herein), and then has a thickness of 0.08 mm. The circular asymmetrical aramid paper with a diameter of 500 mm is placed on the central axis layer by layer, and the flat plate electromagnetic heating piece is pressed on both ends of the central axis, and the heating piece is connected with the external heating controller to heat the pressing piece. Then, applying 2t of dynamic pressure intermittently on the tablet to stack the sheets together. When the density of the pressure roller reaches the production requirement, apply 24h, 1t static pressure on the laminated paper to make these The paper is composited into a seamless cylinder, and the obtained cylinder is preferably a cylindrical cylinder with a through hole at the center, and then the flat electromagnetic heating sheet is removed, and the metal plate fixing device is replaced, and the annular aramid paper is replaced. The cylinder is fixed on the central shaft to prepare a meta-aramid paper pressure roller. In addition, it is also possible to prepare meta-aramid paper pressure rolls of different densities by adjusting the magnitude and time of dynamic pressure and static pressure. The density is between 1.4 and 1.6 g/mm ³ .

Example 2

The pressure roller of the present invention is a roller body composed of a central shaft 1 and a cylinder 2 of aramid paper and two flat plate fixing devices 3, wherein the cylindrical body 2 is made of a circular asymmetrical aramid paper and a circle having the same diameter. a ring-shaped aramid paper mixed composition, specifically a ring-shaped meta-aramid paper having a diameter of 600 mm and a thickness of 0.13 mm The circular abutment aramid paper with a thickness of 0.08 mm is alternately layered on the central axis, and the flat plate electromagnetic heating plate is pressed at both ends of the central shaft to connect the heating plate to the external heating controller. The sheet is heated, and then a static pressure of 2.2t is applied intermittently on the tablet to laminate the sheets together, and then applied to the laminated cardboard for 30 hours, static pressure of 1.2t, so that the papers are combined into a seamless The cylinder. Then, the flat plate electromagnetic heating piece is removed, and the metal plate fixing device is replaced, and a cylinder composed of a circular aramid paper and a circular asymmetrical aramid paper is fixed on the central axis, thereby obtaining a meta-position. Pressure roller mixed with rayon paper and para-aramid paper.

The aramid paper cylinder of the invention is formed by stacking a circular aramid paper sleeve with a hole in the center in the radial direction of the central axis, and the circular aramid paper and the superposition method are the best embodiments. The aramid paper may also be in the form of a rectangle, a cylinder or even a pulp. The cylinder may be formed by winding, wrapping, coating or the like in the longitudinal direction of the central axis. In short, the object of the present invention can be achieved according to the present invention. Equivalent transformations made by the spirit of the invention fall within the scope of the invention.

It should be noted that the above embodiments are only intended to illustrate and not to limit the technical solutions of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art will understand that the invention can still be modified. Equivalents and modifications may be made without departing from the spirit and scope of the invention.

Claims

A pressure roller comprising a roller body and a central shaft, characterized in that: the pressure roller comprises a roller body and a central shaft disposed on the roller body, the roller body comprises a cylinder body and is connected at two ends of the cylinder body A metal plate fixing device which is formed by stacking a plurality of layers of paper having the same area.
A pressure roller according to claim 1, wherein said metal plate fixing means is made of iron or copper.
A pressure roller according to claim 1, wherein said paper is natural wood pulp paper or polyimide paper, polyparaphenylene benzoxazole paper, para-aramid paper or meta-aramid. Paper synthetic paper.
The pressure roller according to claim 1 or 3, wherein the paper is a para-aramid paper or a meta-aramid paper.
A pressure roller according to claim 1 or 4, wherein the shape of the aramid paper is a ring having a hole in the center, and the diameter of the center hole is slightly larger than or equal to the outer diameter of the central axis.
A pressure roller according to claim 5, wherein said aramid paper has a thickness of from 0.02 to 0.80 mm and a diameter of from 200 to 1000 mm.
A pressure roller according to claim 6, wherein said aramid paper has a thickness of from 0.05 to 0.58 mm and a diameter of from 400 to 700 mm.
A method of preparing a pressure roll according to claim 1, wherein the aramid paper is layered on the central axis, and the flat plate electromagnetic heating piece is pressed on both ends of the central axis, and is continuously applied on the heated compressed piece. Intermittent dynamic pressure, press the paper together, and then apply a static pressure less than the dynamic pressure, so that the paper is combined into a seamless cylinder, and then the flat electromagnetic heating sheet is removed and replaced with a metal flat plate fixing device. Aramid paper pressure rolls can be obtained.
A method of producing a pressure roll according to claim 8, wherein the applied intermittent dynamic pressure is 1.5 to 2.5 t and the static pressure is 0.5 t to 1.5 t.
A method of preparing a pressure roll according to claim 8, wherein:

1 applied intermittent pressure is 1.8-2.2t, static pressure is 0.8-1.2t;

2 The density of the aramid paper pressure roll produced was 1.3-1.8 g/m 3 .