JPS5868514A - Plastic roller and its forming method - Google Patents

Abstract

PURPOSE:To improve performance as the roller for processing soft material by a method wherein the fiber reinforced plastic layer and the pure plastic layer are rolled around the core metal roll, and the fiber reinforced plastic layer strengthenes the parts in which cracks and exfoliation are easily occur. CONSTITUTION:At the manufacturing, after the core metal roll 1 is inserted into the metal mold 5, and cavity 6 is formed between said core metal roll 1 and the metal mold 5, the melted carbon fiber reinforced plastic (f) is inject into the cavity 6 while being presured. Then the above plastic (f) is cooled, and the core metal roll 11 forming the fiber reinforced plastic layer 3 is taken out from the metal mold 5. Next, the roll shaft 1a is supported rotatably by the pedestal 7, the vinylidene difluoride group soft plastic P is pushed out from the T extruding die 8 and the end of the plastic P is welded on the surface of the layer 3. While the roll 1 is rotated, the soft plastic P is sequentially supplied, and wound around the layer 3 with a constant tention, and after the roll 1 is cooled, the pure plastic layer 4 is formed.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a plastic roll and a method for molding the same, and in particular, in a plastic roll having a plastic layer on the surface of the core roll, a plastic layer is added to the inner 14. The glass rule is made up of a separated plastic layer and an outer pure glass layer, and the core roll is made of glaze-reinforced thermoplastic! This invention relates to a method of forming a plastic roll by forming a plastic layer by its thermal shrinkage force and wrapping and adhering an outer pure plastic layer.

Plastic rolls include calendar rolls and Nitsu! used when forming glass sheets. It is used for processing soft materials, such as rolls or suppression rolls used when printing surface coating compositions such as inks on glass sheets.

This is because the surface of the TDF plastic roll has moderate elasticity, which is softer than a metal roll and harder than a rubber roll, so it is compatible with the strength of plastic sheets and printed materials. By the way, this plastic roll conventionally has a core metal roll 1 and a single plastic layer 2 formed thereon, as shown in FIG. The molding method used was a method called the lining method. This method is
It is formed by, for example, coating the core metal roll 1 with a gelastec core liquid. In this method, the film thickness formed by one coating is small, so the coating is repeated many times to gradually increase the film thickness. When such a glass roll is used as a calender roll or two rolls as described above, especially when the film thickness is small, when it is pressed against another roll VC,
Since the stick layer 2fi has a large coefficient of thermal expansion and poor strength, it may crack or peel off from the core roll 1. This peeling also occurs due to thermal deformation of the plastic layer 2. In such a state, the glass roll cannot uniformly extrude the glass sheet or the above-mentioned printed coating, so there has been a demand for improvement.

In order to improve the problem that the plastic layer of a plastic roll has a large coefficient of thermal expansion and lacks strength, it may crack or peel off from the core roll. This book provides a glass roll that compensates for its weak strength and prevents cracking. In order to produce the fiber-reinforced plastic roll, the fiber-reinforced f-y stick layer is tightly wound and glued onto the core metal, and the fiber-reinforced plastic If! The present invention provides a method for forming a glass roll that can bond a pure glass layer to a plastic roll. To this end, the plastic roll of the present invention includes a core roll, a fiber-reinforced glass layer fixed to the surface of the core roll by the shrinkage force of the fiber-reinforced thermoplastic glass layer, and the fiber-reinforced glass layer. It is characterized by comprising a plastic layer metal fitting to which a thermoplastic plastic layer is adhered. In addition, the method for forming a plastic roll that is the object of the present invention involves inserting a core metal roll into a mold and melting Fg1. A fiber-reinforced, heat-reinforced thermoplastic glass is filled, and after this filling, a fiber-reinforced glass layer is formed on the core roll by cooling under pressure. This method is characterized in that a pure glass layer is formed by wrapping a thermoplastic glass layer that can be bonded to the fiber-reinforced glass layer side.

The fiber-reinforced glass layer of the present invention is provided at a portion that contacts the core roll and particularly requires strength. This strength is determined by the fact that when shear stress occurs in the fiber-reinforced glass layer while the glass roll is in use,
This glass layer is of such a level that it does not cause cracks or peel off from the core metal a-ru. As such fiber-reinforced glass, a thermoplastic plastic mixed with inorganic fibers such as glass fibers, carbon fibers, metal wax fibers, or mineral fibers and reinforced with K is used. As the thermoplastic glass, vinylidene difluoride plastic is preferred because it has high tensile strength and heat resistance, but it is not limited thereto, and polyolefin glass that can provide the above-mentioned strength may also be used. This fiber-reinforced glass layer is wound by, for example, the 70-molding method with a contraction force that strongly tightens the core metal roll.

In addition, the pure glass layer is intended to provide elasticity suitable for pressing plastic sheets and printed coatings, and it adheres well to the fiber-reinforced glass layer and has elasticity suitable for various uses of glass rolls. Various thermoplastics are used that impart

When the glass roll formed in this way is used, for example, as a calender roll, the fiber-reinforced glass has the above-mentioned strength, has a small coefficient of thermal expansion, and is difficult to deform due to heat, so it is difficult to use as a core roll. Even when there is contact and the situation is such that it is easy to cause nicking or peeling, these phenomena are made less likely to occur. On the other hand, since the outer glass layer contacts the fiber-reinforced glass layer, which is softer than the core metal roll, it is relatively easy to alleviate shear stress, and even if it is relatively weak, cracks and peeling islands can occur. Make it difficult to do.

To form the plastic roll of the present invention, a core metal roll is inserted into a mold, molten fiber-reinforced thermoplastic glass is pressurized and filled into the cavity between the core metal roll and the mold, and after filling, the mold is heated. A flow molding method is used in which a fiber-reinforced glass layer is formed by pressure cooling. This method is
It is possible to have a large cooling temperature difference between melting and solidifying the glass, which suppresses outward deformation.
The shrinkage force of the fiber-reinforced glass layer formed on the core roll can be increased. Therefore, the fiber-reinforced glass layer is fixed to the core metal roll by strongly tightening it.

As a result, the fiber-reinforced plastic layer becomes difficult to peel off from the core metal roll.

A pure plastic layer is then formed by bonding the fiber reinforced plastic. The thermoplastic plastic layer may be bonded by melting the entire thermoplastic glass and applying this melt, or by melting a part of the thermoplastic glass sheet. Alternatively, backfilling can be done by using an adhesive between the thermoplastic sheet and the fiber-reinforced glass layer.

Next, an embodiment of the present invention will be explained based on FIGS. 2 to 4.
I will explain.

Fig. 2 is a perspective view of a plastic roll according to an embodiment of the present invention, Fig. 3 is a partial vertical sectional view showing the forming state in the first step of the forming method, and Fig. 4 is the forming in the second step. It is a perspective view showing a state.

In the figure, the same reference numerals as in other figures indicate the same components. 3 is a carbon fiber reinforced glass layer, and core metal roll 1
It is wrapped around the outer circumferential surface by the 70-molding method. This carbon fiber-reinforced plastic layer 3 contains 5 to 5 ol of carbon fibers to the vinylidene difluoride glass stick.
ttl, for example, a mixture of 25 layers and 14 layers, and is formed to a thickness of approximately 15 mm. A pure plastic 1-4 is formed by wrapping a vinylidene difluoride plastic layer whose surface is molten on top of the carbon fiber reinforced plastic layer 3. This pure glass layer 4
is approximately 10-mm thick.

In order to mold the above-mentioned plastic roll, first, as shown in FIG.
The molten carbon fiber-reinforced glass f is injected into this cavity 6 under pressure, and after this injection, it is cooled while being pressurized.

Then, the core metal roll 1 on which the fiber-reinforced glass layer 3 is formed is taken out from the mold 5. (This molding method was applied for in Japanese Patent Application No. 55-1
84989) Next, as shown in FIG. 4, the shaft 1ae1m of the core metal roll 1 is supported on the pedestal 7 so as to be rotatable. On the other hand, vinylidene difluoride-based softened glass P is pressed from T/I8. The surface layer of this softened glass snack is heated above the melting point, and the middle portion is kept solid enough to maintain a constant tension. The tip of the extruded softened plastic P is fused to the surface of the fiber-reinforced glass layer 3. Then, the fiber-reinforced plastic layer 3 is sequentially rotated by the shaft 111+1m, and the softened plastic P is sequentially supplied from the T-die 8, and the softened plastic P is wrapped around the fiber-reinforced plastic layer 3 while applying a constant tension. . When cooled, a pure plastic layer 4 is formed which is tightly wound and bonded to the fiber-reinforced plastic layer 3. After this, the surface is smoothed and the glass roll is completed.

As described above, the fiber-reinforced plastic layer 3 is wrapped around the core metal roll IK with a strong contraction force.
is heat-sealed to this fiber-reinforced glass layer 3 to form a glass roll.

When this glass roll is used as a calendar roll or a press roll for printing, the fiber-reinforced glass layer 3 prevents cracks and peeling in areas that are likely to occur, and the J-made plastic layer 4 has a relatively strong strength. This can reduce the occurrence of cracks and fnl failure.

In the above embodiment, the width of the core roll 10 is T-die 80mm.
However, as shown in FIG. 5, if the width of the core roll l is larger than the width of the die 80 as shown in FIG. The softened plastic P may be spirally wound around the fiber-reinforced plastic layer 3 while moving the fiber-reinforced plastic layer 7'. In this way, the relatively narrow band-shaped softened plastic P extruded from the die 8' can be spread out, making it easier to maintain the tension.

Furthermore, if the softened glass P extruded from the T-die 8 and the die 8' is wound multiple times, glass layers of various thicknesses can be formed.

As explained above, according to the present invention, the fiber-reinforced glass layer and the pure plastic layer are provided, and the areas where cracks and peeling are likely to occur are reinforced with the fiber-reinforced glass layer. The pure plastic layer can reduce the occurrence of cracks and peeling, and can further improve the performance of the roll for processing soft materials.

(by the blowfish method) can increase the adhesion force to the core metal roll and increase the strength by increasing the thickness of one layer. Furthermore, since the pure plastic layer is formed by winding and gluing, it can be easily molded, and it can also be flexibly adjusted to adjust the thickness and make wide plastic rolls.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a conventional plastic roll, FIG. 2 is a perspective view of a plastic roll according to an embodiment of the present invention, and FIG.
The figure is a cross-sectional view showing the gauze state in the first step of the method for forming a glass roll according to an embodiment of the present invention, and FIG.
FIG. 5 is a perspective view showing the forming state of the second step of the plastic roll forming method of another embodiment. In the diagram, 1 is a core metal roll, 2 plastic layers, and 3 carbon fiber reinforced plastic! Urn, 4 is glassy layer, 5
is a mold, 6-shaped cavity, 7#7' is a stand, 8-shaped T die, 8' is a die, f is a molten carbon fiber reinforced glass, P is a softened plastic O. Invented on 16th IO, 1981 Person: Kinnosuke Yoshioka Patent applicant: Higashi Kogyo Co., Ltd. Figure 1, Figure 1114

Claims (2)

[Claims] (1) A core roll and N! which is fixed to the circumferential surface of the core roll by the heat shrinkage force of a fiber-reinforced thermoplastic layer. , a plastic roll comprising a separated plastic layer and a pure glass layer in which a thermoplastic plastic layer is adhered to the fiber-reinforced glass layer. (2) The core roll is inserted into a mold and the cavity formed between them is filled with molten fiber-reinforced thermoplastic plastic under pressure, and after this filling, the core roll is cooled under pressure to fill the core roll with fiber-reinforced glass. Forms a tic layer, and then at least removes the original layer from the fiber-reinforced glass tic layer! A method for forming a plastic roll, characterized in that a plastic roll is formed by winding a thermoplastic glass layer whose plastic Jdt side is in contact with each other.