JPH01163017A - Manufacture of roll lined with cured resin - Google Patents

Abstract

PURPOSE:To manufacture a roll easily molded and with superior smoothness on its outer surface by inserting a fiber reinforced plastic pipe on a metal pipe concentrically into a hollow mold, filling compressively cured resin while having pressure in a space between said mold and pipe negative and curing. CONSTITUTION:A material pipe tube 7 to be lined is inserted into a hollow mandrel 6 with flanges at both ends having inner surfaces corresponding to a desired diameter and with surface smoothness degree, and O-rings 13 are set at the both ends of the material tube 7, and then companion flanges 12 are fixing set at the both ends of the hollow mandrel 6. Next, valves 11, 11, a resin injecting port 5 and a vacuum tank 8 are set to actuate a vacuum pump, and simultaneously a valve 11 on the resin injecting port 5 side is opened to inject blended resin. The companion flanges are removed after resin is completely cured, and the material is drawn out of the mandrel to manufacture a roll material lined with resin.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for manufacturing a roll lined with a curable resin.

[Conventional technology and its problems]

To transport raw materials or products to all industries such as brewing, food processing, paper manufacturing, printing, etc. q! R stock rolls are used, but metal rolls are heavy and difficult to handle, and also have disadvantages such as corrosion, so the cost is M.
Light and rust-resistant glass rolls are gradually being adopted as C2 rolls.

A conventional method of manufacturing a plastic roll will be explained with reference to FIGS. 4 and 5.

The 41st is fiber reinforced plastics (hereinafter referred to as FRP (!:
The fifth factor is a view from the side (axial direction) of the place where the roll material (to be described) is manufactured,
Code 1 is the mandrel (core metal), 2 is the multi-layered FRP
1 m, 6 indicates reinforcing fiber, 4 indicates matrix fat, thermosetting resin 4 (unsaturated polyester toilet fat, (vinyl ester fat storage, epoxy resin, etc.)
While coating and impregnating reinforcing fibers 3 (inorganic fibers such as glass fibers, carbon fibers, organic fibers such as aramid fibers), F is applied to a predetermined thickness by hand lay-up method or FW method.
After the RP layer 2 is stack-formed, it is V-cured by Calo thermosetting method. Note that when a room temperature curable resin is used, it can be cured at room temperature.

In addition, heat curing of Mado IJTux 9. This is also true when mixing resin with additives, etc.

After curing, the molded product is pulled out using a mandrel, cut into a predetermined length (11*f&), and the outer surface is polished and polished using a lathe or the like to obtain a constant outer diameter and a predetermined smoothness.

When manufacturing a roll by the above-mentioned method, the outer surface is difficult to process, the reinforcing ruts are exposed, and the process requires a large number of man-hours.

Also, the larger the diameter and length, the more systematic processing techniques and man-hours are required.

[Purpose of the invention]

The present invention eliminates the need for complicated and highly technical processing work on the outer surface, facilitates molding work, and provides a lining with a curable resin that makes it possible to obtain a uniform product with excellent outer surface smoothness. The purpose of the present invention is to provide a method for manufacturing rolls.

[Structure of the Invention] The present invention provides V of the same smoothness as the required outer surface of the roll.
A curable method characterized by inserting a fiber-reinforced plastic pipe or a metal pipe concentrically into a hollow mold having three surfaces, and applying negative pressure to the space between the two to fully press-fit the curable resin and harden it. A method for manufacturing rolls lined with double fat.

As the hollow tube used in the present invention, a steel tube or other metal tube can be used, and as the '# (steel tube) to which the second coating of the curable resin is applied, an FRP tube or a steel tube, Other metal tubes can be used.

Further, as the curable resin, a room temperature curable resin such as an unsaturated polyester resin, a vinyl ester resin, an epoxy resin, or a thermosetting resin can be used.

The present invention is carried out using equipment #L consisting of a hollow mandrel with flanges at both ends having an inner surface of the same smoothness as the outer surface of the desired roll, a pneumatic resin injection pot and a vacuum tank. Set the stacked pipe to be inked on a medium nitrogen mandrel with flanges at both ends, and while injecting polythermosetting resin under pressure from the - side, use a vacuum tank to dry between the mandrel's inner diameter and the steel pipe's outer diameter. Remove the air that exists in the area.

By this method, a smooth surface resin layer with higher density and almost no bubbles can be obtained without the need for lathe processing on the outer surface. explain.

Figure 1 shows an apparatus for manufacturing a roll with two innings of W fat according to the present invention, where 6 is a hollow mandrel with 7 flanges at both ends, 7 is a steel pipe on which two innings are to be applied, and 5 is a A resin pot, 8 indicates a vacuum tank.

Moreover, FIG. 2 is a sectional view of a product manufactured by this method. In addition, in FIG. 2, 7 indicates a steel pipe f14 and a resin lining layer.

First, the raw material to be subjected to the second inning 1t7, such as a surface-treated 9 FRP pipe, a steel pipe whose surface has been treated by sandblasting, etc., or other metal wt1, is coated on the inner surface according to the desired outer diameter and outer smoothness. The tube is inserted into a hollow mandrel 6 with flanges at both ends, and O-rings 13 are set at both ends of the blank tube 7, respectively.

Next, the companion flange 12' (I) is fixedly set to both ends of the hollow mandrel 6 with bolts.

In this case, the clearance Fi (L 1 njm or less is desirable) between the inner diameter of the companion flange 12 and the outer diameter of the blank pipe 7.

The reason for this is that the companion flange 12 does not have a QIJ ring stop length, but also includes the centering work of the raw pipe.

Next, set the pulp 11, 111 in the position shown in FIG. 1, and set the resin injection pot 5 and vacuum tank 8.

Add curing accelerators, curing agents, and other additives to the desired thermosetting resin in advance, such as alumina to improve wear resistance, metal paint or carbon powder to prevent WI electric shock, etc., to the resin injection pot. Add the blended resin mixed with the flL injection fibers.

At this point, the resin injection side valve 11 is still closed.

Next, at the same time as the vacuum pump is activated, the valve 11i on the resin injection pot 5 side is gradually opened, and the air pressure is increased to 1 to 2 k.
Add gfA-G and forcibly inject the blended resin.

When filling is completed, both pulps 11 are closed at the same time to allow the blended resin to flow into the vacuum tank.

Then, by removing the completely cured temporary phase flange of the W resin and pulling it out from the mandrel, a roll material made of two innings of resin with a good smooth outer surface and uniform quality can be obtained.

Next, the method shown in FIG. 1 is a method for manufacturing a roll lined with the resin of the present invention using apparatus A, with reference to FIG. 3.

In the case shown in FIG. 3, after fitting the O-ring 3t into the O-ring groove cut at a predetermined position in the base tube 7, the O-ring is forcibly fitted into the outer cylinder mold 15 and set. Inject the resin from the vacuum suction mouth and resin injection port provided on the inner side in exactly the same manner as explained in connection with Fig. 1, and after curing, the outer cylinder mold 15 was filled with the hardening resin for two innings. Use a tool to pull out the blank tube 7.

[Brief explanation of the drawing]

Claims (1)

[Claims] Fiber-reinforced plastic pipes or metal pipes are concentrically inserted into a hollow mold having an inner surface with the same smoothness as the outer surface of the required roll, and the curable resin is press-fitted while applying negative pressure to the space between the two. A method for producing a roll lined with a curable resin, characterized by curing the roll using a curable resin.