JPH0573473B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an apparatus for manufacturing a resin-supported sheet, and more particularly to an improvement in an apparatus for manufacturing a resin-supported sheet used for manufacturing prepreg.

[Prior art]

A resin-supported sheet is a thin film of resin coated on one side of a base sheet, and in the prepreg manufacturing process, the resin-supported side is overlapped with reinforcing fibers arranged in a sheet-like manner, and then subjected to pressure treatment under heat. , is used as a material for transferring the supported resin to the reinforcing fiber side.

Conventionally, as a manufacturing device for such a resin carrier sheet, a heated coater roll and a metering roll are arranged facing each other, and a thermosetting resin is melted in the space formed along the axial direction between the two rolls. There is a method in which the resin is stored in a resin reservoir and the resin is quantitatively transferred from this resin reservoir to the base sheet. However, in this device, the resin stored in the resin reservoir at the end of the roll where heat dissipates easily becomes low temperature, whereas the resin stored in the resin reservoir in the center where heat dissipates less tends to become high temperature. Since curable resins tend to undergo thermal changes over time, a situation occurs in which resins with significant differences in thermal history coexist in the resin reservoir.

In addition, the molten thermosetting resin in the resin reservoir rotates as the rolls rotate, but the resin at the center of rotation tends to flow and tends to stay in the center, resulting in Only the resin in the surface layer is heated, and a state in which resins with different thermal histories coexist occurs in the same manner as above.

If resins with different thermal histories are applied to the base sheet while coexisting in this way, the resulting resin carrier sheet will have quality unevenness all over the sheet, reducing its product value. become.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide an apparatus for manufacturing a resin-supported sheet that does not cause unevenness in the quality of the resin-supported resin supported on the base sheet.

[Structure of the invention]

In order to achieve the above object, the present invention forms a resin reservoir between a coater roll and a metering roll that are arranged parallel to each other with a small gap, and the molten heat remaining in the resin reservoir is In an apparatus for manufacturing a resin-supported sheet in which a curable resin (hereinafter abbreviated as resin) is quantitatively fed out from the small gap and applied to the base sheet, a beveled non-rotating stirring blade is provided in the resin reservoir. ,
It is characterized in that the tip thereof faces the small gap and is provided so as to be able to reciprocate in the direction of the rotation axis of the coater roll and the metering roll.

The base sheet of the resin carrier sheet of the present invention includes kraft paper with a thickness of about 0.05 to 0.2 mm,
A coating layer of a filler such as clay, starch, polyethylene, or polyvinyl alcohol is provided on both sides of paper such as roll paper or glassine paper, and a silicone-based or non-silicone mold release agent is preferably applied on each coating layer. A release paper coated with a release agent made of a condensation reaction type silicone or an addition reaction type silicone of polydimethylsiloxane and polydimethylhydrodienesiloxane is preferably used.

In addition, the resin applied to the above base sheet includes epoxy resin, unsaturated polyester resin,
Thermosetting resins such as phenolic resins and polyimide resins are preferably used.

[Embodiments of the invention]

Hereinafter, the present invention will be explained with reference to embodiments shown in the drawings.

In the embodiment shown in FIGS. 1 and 2, 1 is a coater roll, and 2 is a metering roll. Both rolls 1 and 2 are heated to the same surface temperature by a heating medium circulating inside, and are arranged in parallel with each other in pairs with a small gap 4 interposed therebetween, so that they have the same surface temperature as shown by the arrows. It is designed to be rotationally driven in the direction. A space formed along the axial direction between the rolls 1 and 2 serves as a resin reservoir 3, in which molten resin 7a is stored. Inside the resin reservoir 3, a beveled non-rotating stirring blade 16, the details of which will be described later, is provided, and a weir plate 5 is provided on the lower side.

A heating roll (not shown) is provided above the metering roll 1, and a block-shaped resin is brought into contact with the surface of the heating roll under its own weight, and the portion in contact with the heating roll is melted, and the molten resin 7
a along the guide plate 8 and flowing down into the resin reservoir 3 below.

On the other hand, on the downstream side in the rotational direction of the resin reservoir 3 on the surface of the coater roll 1, a film of molten resin 7a having a uniform thickness is formed due to the gap 4 between the coater roll 1 and the metering roll 2. In addition, at the bottom of coater roll 1,
A sheet supply roll 9 made of an elastic material such as rubber is crimped, and the coater roll 1 is pressed as shown by the arrow.
is rotating in the same direction. This sheet supply roll 9 feeds the strip-shaped base sheet 10 to the coater roll 1.
The film-like molten resin 7a formed on the surface of the coater roll 1 is transferred onto the surface of the base sheet 10, and the resin carrier sheet 1
1.

In the resin reservoir 3, a pair of right and left arrow-shaped non-rotating stirring blades 17 are immersed. The non-rotating stirring blades 17, 17 are fixed to a support frame 18, and this support frame 18 is connected to the air cylinder 2 via a bracket 19.
0 piston rod 20a. The air cylinder 20 is fixed on a fixed frame 21, and a pair of parallel guide rails 22, 22 are provided on the fixed frame 21.
The guide rail 2 is fixed along the stroke direction of the piston rod 20a.
2 and 22, the bracket 19 is slidably guided.

The above-mentioned non-rotating stirring blade 17 is forced to reciprocate repeatedly along the axial direction of the rolls 1 and 2 by the cylinder 20 with its tip facing the small gap 4, so that the resin is melted in the small gap 4 of the resin reservoir 3. Stir the resin 7a. Therefore, the retention spots of the molten resin 7a are eliminated, and the heat history spots based on the retention spots can be eliminated. Therefore, it is possible to form a homogeneous resin-supporting sheet 11 with no quality irregularities.

Note that the reciprocating drive means for the stirring blades 17 is not limited to the air cylinder 20, but may also be a sheet that uses another heating fluid, or another reciprocating drive mechanism that converts rotational motion into reciprocating motion via a link mechanism. etc. can also be used.

〔Effect of the invention〕

As described above, the resin carrier sheet manufacturing apparatus of the present invention includes a coater roll and a metering roll arranged in parallel to each other to form a small gap and a resin reservoir, and a small gap in the resin reservoir. Since the non-rotating stirring blade is configured to reciprocate with its bevelled tip facing toward the front, the thermosetting resin can be heated in the small gap and just before being sent out from there. Since uniform stirring and mixing can be performed, it is possible to eliminate heat history unevenness of the thermosetting resin and to manufacture a resin-carrying sheet in which a homogeneous resin is supported on the entire surface of the base sheet.

[Brief explanation of drawings]

FIG. 1 is a schematic side view of a resin-supported sheet manufacturing apparatus according to the present invention, and FIG. 2 is a view taken in the direction of the arrows in FIG. 1. 1... Coater roll, 2... Metering roll, 3... Resin reservoir, 7a... Melted resin, 10
... Base sheet, 11 ... Resin support sheet, 1
7...Non-rotating stirring blade.

Claims (1)

[Claims] 1. A resin reservoir is formed between a coater roll and a metering roll that are arranged parallel to each other with a small gap, and the molten thermosetting resin remaining in the resin reservoir is removed. In the apparatus for producing a resin-supported sheet that is quantitatively fed out from the small gap and applied to the base sheet, a beveled non-rotating stirring blade is provided in the resin reservoir;
1. An apparatus for manufacturing a resin carrier sheet, characterized in that the tip thereof faces the small gap and is movable back and forth in the direction of the rotation axis of the coater roll and the metering roll.