JPH0639896A - Die for preparation of long filament-reinforced composite material - Google Patents

Abstract

PURPOSE:To provide a die for manufacturing a long filamentreinforced composite material which improves workability of a step-making work for making a bundle of long filaments meander in an impregnation room. CONSTITUTION:A die is constituted manufacturing composite material consisting of a first inner cylinder member 11 for forming one side of an impregnation room 10 for impregnating a molten resin in a long filament bundle, 12 forming another side of the impregnation room 10 and a plurality of meandering plates 21 and 22 set in a zigzag configuration on the inner faces of the first and second inner cylinder members 11 and 12 and projected in the radial direction of the first and second inner cylinder members 11 and 12 toward the centers of the first and second inner cylinder members 11 and 12 and having openings 20 where a molten resin passes through and for making the bundle of long filaments F meander in the impregnation room. By using this die, the step- making work for making the bundle of long filaments meander in the impregnation room 10 is automatically completed only by setting integrally the first and second inner cylinder members 11 and 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a die for producing a long fiber reinforced composite material comprising a thermoplastic resin containing long fibers therein.

[0002]

2. Description of the Related Art JP-A-3-183531 and U.S. Pat.
S. Pat. No. 4, 439, 387, etc., a continuous long fiber bundle is supplied into the molten thermoplastic resin, and this is simultaneously extruded together with the molten thermoplastic resin, after which a thermoplastic resin containing the long fiber bundle inside and solidified A manufacturing method for cutting into pellets or the like is disclosed.

In these manufacturing methods, in order to sufficiently impregnate the long fiber bundle with the molten thermoplastic resin, when the long fiber bundle passes through the impregnation chamber of the die in which the molten thermoplastic resin is injected under pressure, A plurality of pins protruding in the radial direction are arranged in a staggered manner in the impregnation chamber, and the long fiber bundles are suspended around the pins so that the long fiber bundles meander in the impregnation chamber.

[0004]

In the conventional method for producing a long fiber reinforced composite material, in order to suspend the long fiber bundle on the pins arranged in a staggered manner in the impregnation chamber, the die is placed on a surface perpendicular to its axis. It was cut by and divided into multiple sub-dies. That is, in the conventional manufacturing method, for each sub-die, the long fiber bundle is inserted into the impregnation chamber and the long fiber bundle is suspended around each pin so that the thread is passed through the hole of the needle using tweezers or the like. It was Then, after integrating each sub-die with bolts and assembling an external die, a die back, a die head, a heater and the like on the die, the work of impregnating the long fiber bundle with the molten thermoplastic is started.

As described above, in the conventional method for producing a long fiber reinforced composite material, the workability of the setup work for causing the long fiber bundle F to meander in the impregnation chamber was extremely inefficient. The poor workability of the setup work adversely affects the overall productivity of the manufacturing process of the long fiber reinforced composite material. The present invention has been made in view of such circumstances. An object of the present invention is to provide a die for producing a long fiber reinforced composite material, which improves workability of a setup operation for causing a long fiber bundle to meander in an impregnation chamber.

[0006]

A die for producing a long fiber reinforced composite material according to the present invention comprises a semi-cylindrical first tubular member forming one side of an impregnation chamber for impregnating a long fiber bundle with a molten resin. ,
A semi-cylindrical second tubular member that forms the other side of the impregnation chamber, and the centers of the first and second tubular members that are arranged in a staggered manner on the inner surfaces of the first and second tubular members. Toward the radial direction of the first and second cylindrical members,
Further, it is characterized by comprising a plurality of plate-shaped meandering means for meandering the long fiber bundle in the impregnation chamber, the plurality of meandering means having an opening through which the molten resin passes.

[0007]

The die for producing a long fiber reinforced composite material of the present invention comprises a semi-cylindrical first cylinder member forming one side of the impregnation chamber and a semi-cylindrical second cylinder member forming the other side of the impregnation chamber. It is divided into a tubular member. A plurality of meandering means are arranged in a zigzag manner on the inner surfaces of the first and second cylindrical members. The meandering means is for making the long fiber bundle meander in the impregnation chamber, and has a plate-like shape protruding in the radial direction of the first and second tubular members toward the center of the first and second tubular members. At the same time, it has an opening through which the molten resin passes.

When carrying out the setup work for meandering the long fiber bundle in the impregnation chamber of the die for producing a long fiber bundle reinforced composite material of the present invention, first, the first and second tubular members are divided. Then, the long fiber bundle is stretched between the divided first and second tubular members in parallel with the central axes thereof and over the entire length of the first and second tubular members. Then, the first and second tubular members are integrated while the long fiber bundle is stretched between the first and second tubular members.

Then, since the plurality of meandering means projecting in the radial direction of the first and second cylinder members are arranged on the inner surfaces of the first and second cylinder members, the top sides of the plurality of meandering means are arranged. , The long fiber bundle is pressed in the radial direction of the first and second tubular members. Furthermore, since the plurality of meandering means are arranged in a zigzag manner on the inner surfaces of the first and second tubular members, the respective top sides of the meandering means adjacent to each other respectively have the long fiber bundles of the first and second long fiber bundles. The cylinder member is pressed in the opposite direction in the radial direction.

That is, in the long-fiber-reinforced composite material-producing die of the present invention, if the first and second tubular members are integrated while the long-fiber bundle is stretched between the first and second tubular members. The setup work for causing the long fiber bundle to meander in the impregnation chamber is automatically completed.

[0011]

EXAMPLE An example of a die for producing a long fiber reinforced composite material according to the present invention will be described below with reference to the drawings. Figure 1
FIG. 1 is a cross-sectional view of an example of a die for producing a long fiber reinforced composite material of the present invention (hereinafter, simply referred to as die 1) taken along a plane including a central axis thereof. As shown in FIG. 1, this die 1
Is an impregnation chamber 1 for impregnating the long fiber bundle F with the molten resin.
A semi-cylindrical first inner cylinder member 11 forming one side of 0,
The semi-cylindrical second inner cylinder member 12 forming the other side of the impregnation chamber 10 and the long fiber bundles F arranged in a zigzag pattern on the inner surfaces of the first and second inner cylinder members 11, 12 meander. A plurality of meandering plates 21 and 22, a semi-cylindrical first outer cylinder member 31 that holds the first inner cylinder member 11 on its inner peripheral surface, and a second inner cylinder member 12 on its inner peripheral surface. A semi-cylindrical second outer cylinder member 32, a first and second inner cylinder members 11, 12 and a rear end portion of the first and second outer cylinder members 31, 32 that are held by their inner surfaces and end surfaces. Manifold 40, first and second inner cylinder members 11 and 12, and first and second outer cylinder members 3
A cylindrical die head 50 for holding the front end portions of the first and the second end portions 32 and 32 on the inner surface and the end surface thereof, and the first and second outer cylinder members 31,
32, a semi-cylindrical first heater 61 that holds the upper outer peripheral surface of the manifold 40 in the figure on its inner peripheral surface, the first and second outer cylinder members 31, 32, and the lower outer peripheral surface of the manifold 40 in the figure that is illustrated. It is composed of a semi-cylindrical second heater 62 held on the inner peripheral surface, and a die back 70 arranged at the rear end of the manifold 40.

FIG. 2 is a front view of the first and second inner cylinder members 11 and 12 forming a main part of the die 1 and a side view thereof. As shown in FIG. 2, the first and second inner cylinder members 11 and 12 are semi-cylindrical members, and the central portions thereof are cut to form a rectangular parallelepiped space. First
The rectangular parallelepiped space generated when the second inner cylinder members 11 and 12 are integrally combined forms the impregnation chamber 10 for impregnating the long fiber bundle F with the molten resin. Further, meandering plates 21 and 22 for causing the long fiber bundle F described below to meander at predetermined positions of the first and second inner cylinder members 11 and 12.
Bolt holes 13 and 14 for fixing them to the inside with bolts or the like are bored in parallel with the radial directions of the first and second inner cylindrical members 11 and 12.

3A and 3B are a front view and a side view of a meandering plate 21 for causing the long fiber bundle F to meander. As shown in FIG. 3, the meandering plate 21 is a plate-shaped member and is detachably arranged on the inner peripheral surfaces of the first and second cylindrical members 11 and 12, and their diameters are increased toward their centers. It is composed of a pair of projecting portions 23, 23 projecting in the direction and a coupling portion 25 coupling the projecting portions 23, 23. The pair of protrusions 23, 23 and the connecting portion 25 form an opening 27 through which the molten resin passes. In addition, at the base of the pair of protrusions 23, 23, the first
Also, bolt holes 29, 29 aligned with the bolt holes 13, 14 drilled at predetermined positions of the second inner cylinder members 11, 12 are drilled. Furthermore, the pair of protrusions 23, 23 and the top of the connecting portion 25 are rounded with a predetermined radius of curvature so that the long fiber bundle F is not cut while the long fiber bundle F is meandering in the impregnation chamber 10. .

Here, as shown in FIG. 1, the meandering plate 21
Are arranged at the rear end of the first inner cylinder member 11 and the front end of the second inner cylinder member 12, and the protrusion length of the protrusion 23 of the meandering plate 21 (the protrusion 23 in FIG. 3). Height) is
It is formed to have the same size as the height of the rectangular parallelepiped space cut in the first and second inner cylinder members 11 and 12. By configuring the meandering plates 21 and 21 in this manner, the first
The meandering plate 21 arranged at the rear end portion of the inner cylinder member 11 passes through the die back 70 and the manifold 40, and the impregnation chamber 1
The long fiber bundle F introduced into the 0 is passed through the center of the impregnation chamber 10 at the rear end of the first inner cylinder member 11, and the meandering plate arranged at the rear end of the second inner cylinder member 12. Reference numeral 21 denotes a long fiber bundle F which a meandering plate 22 described below meanders in the impregnation chamber 10.
At the front end of the second inner cylinder member 12 through the impregnation chamber 10 and the center of the lead-out path 51 of the die head 50 described below.

FIG. 4 is a front view of a meandering plate 22 for causing the long fiber bundle F to meander, and a side view thereof. As shown in FIG. 4, the meandering plate 22 is a plate-shaped member similar to the meandering plate 21, and is detachably arranged on the inner peripheral surfaces of the first and second cylindrical members 11 and 12, and their centers are provided. It is composed of a pair of projecting portions 24, 24 projecting toward the radial direction toward and toward each other, and a connecting portion 26 connecting the projecting portions 24, 24. The pair of protrusions 24, 24 and the connecting portion 26 form the opening 20 through which the molten resin passes. In addition, the pair of protrusions 24, 24
Bolt holes 28, 28 aligned with the bolt holes 13, 14 drilled at predetermined positions of the first and second inner tubular members 11, 12 are formed in the root portion of the. Further, the pair of protrusions 24, 24 and the top of the connecting portion 26 are rounded with a predetermined radius of curvature so that the long fiber bundle F is not cut while the long fiber bundle F is meandering in the impregnation chamber 10. .

Here, as shown in FIG. 1, the meandering plate 22
Are arranged in a zigzag manner in three pairs in the center of the first and second inner cylinder members 11 and 12, and the protrusions 2 of the meandering plate 22 are arranged.
4 has a protrusion length (height of the protrusion 24 in FIG. 4) of the first
Further, it is formed to have a size larger than the height of the rectangular parallelepiped space cut in the second inner cylinder members 11 and 12. By configuring the three pairs of meandering plates 22 in this way, the three pairs of meandering plates 22 are arranged such that the meandering plate 21 disposed at the rear end portion of the first inner tubular member 11 described above is located at the center of the impregnation chamber 10. The passed long fiber bundle F is made to meander at the central portions of the first and second inner tubular members 11, 12.

As shown in FIG. 1, the first and second outer cylinder members 31, 32 have a half inner peripheral surface having the same radius as the outer peripheral surfaces of the first and second inner cylinder members 21, 22. It is a cylindrical member. In addition, a plurality of bolt holes 33 and 34 for fixing the manifold 40 described below with bolts or the like are provided at the right ends of the first and second outer cylinder members 31 and 32 in the figure, respectively, and these bolt holes 33 and 34 are formed. A plurality of bolt holes 35, 36 for fixing the die head 50 described below with bolts or the like are provided at the left end portion in the figure, and the outer peripheral portions of the bolt holes 35, 36 are provided with first and second heaters described below. Bolt hole 3 for fixing 61, 62 with bolts etc.
A plurality of holes 7 and 38 are provided.

As shown in FIG. 1, the manifold 40 is
Introducing path 4 for introducing a molten resin extruded from an extruder (not shown) into the impregnation chamber 10 which is a cylindrical member.
1 is cut in the inside in a direction perpendicular to the paper surface. The introduction path 41 has a shape in which a rectangular parallelepiped space and a cylindrical space are connected to each other, and is arranged in a state where the letter T of the alphabet is almost laid down in FIG. One end of the rectangular parallelepiped space on the right side of the drawing communicates with the discharge port of the extruder,
In the cylindrical space on the left side of the drawing, the first and second inner cylinder members 1
The right ends of the drawings 1 and 12 are fitted. Further, the first and second outer cylinder members 31,
Bolt holes 45, 4 aligned with the bolt holes 33, 34 of 32
6 is drilled, and a bolt hole 4 for fixing a die back 70 described below with a bolt or the like is provided at the right end portion in the figure.
7, 48 are drilled.

As shown in FIG. 1, the die head 50 is a columnar member, and a lead-out path 51 for leading out the long fiber bundle F impregnated with the molten resin to the outside is perpendicular to the paper surface. It is cut in the right direction. This derivation path 51 is
It has a shape in which a frustoconical space and a cylindrical space are connected. The left ends of the first and second inner cylindrical members 11 and 12 in the drawings are fitted in the cylindrical space on the right side of the drawing, and the long fiber bundle F impregnated with the molten resin is inserted through the space of the truncated cone shape on the left side of the drawing. It is discharged to the outside. Further, in the peripheral portion of the die head 50, the bolt holes 3 of the first and second outer cylinder members 31, 32 are provided.
Bolt holes 53, 54 are drilled to align with 5, 36.

As shown in FIG. 1, the first and second heaters 61, 62 include first and second outer cylinder members 31, 32,
The impregnation chamber 1 has a semi-cylindrical shape with an inner peripheral surface having the same radius as the outer peripheral surfaces of the manifold 40 and the die head 50.
Die 1 in order not to solidify the molten resin introduced into
Is a member that keeps or heats the whole. Also, the first
And in the second heaters 61 and 62, bolt holes 37 formed in the outer peripheral portions of the first and second outer tubular members 31 and 32,
Bolt holes 63, 64 aligned with 38 are drilled.

As shown in FIG. 1, the die back 70 comprises a cylindrical portion 71 at the left end in the figure and a flange portion 72 at the right end in the figure that protrudes in the radial direction of the cylindrical portion 71. In the center of 71 and the flange 72, a long fiber bundle F
A through hole 73 for inserting the through hole is formed. The cylindrical portion 71 is fitted to the right end portion of the manifold 40, and the left end surface of the flange portion 72 in the drawing is in contact with the right end surface of the manifold 40. In addition, in the peripheral portion of the flange portion 72, bolt holes 47, 4 formed in the right end portion of the manifold 40.
Bolt holes 75 and 76 are formed to match with No. 8.

Hereinafter, a method of using the die 1 configured as described above will be described. In order to perform the setup work in which the long fiber bundle F is meandered in the impregnation chamber 10 using the die 1, first, the long fiber bundle F is placed in the through hole 73 of the die back 70.
It is inserted over the length of the manifold 40 in the left-right direction. Then, after the die back 70 having the long fiber bundle F inserted therein is fitted to the right end portion of the manifold 40 shown in FIG. 1, the bolt holes 75 and 76 and the manifold 4 are fitted.
The die back 70 is fixed to the manifold 40 by inserting the zero bolt holes 47 and 48 bolts.

Next, as shown in FIG. 5, between the divided first and second inner tubular members 11, 12 in parallel with the central axes thereof, the total length of the first and second tubular members 11, 12 and The long fiber bundle F is stretched over the length of the die head 50 in the left-right direction of FIG. Note that the die back 70, the manifold 40, the die head 50, and the like are omitted in FIG. 5 for easy understanding.

As shown in FIG. 5, the long fiber bundle F is stretched between the first and second inner cylinder members 11 and 12 in parallel with the central axes thereof, and then the first and second inner cylinder members 11 and 12. , 12 are integrated. Then, as shown in FIG. 6, the meandering plates 21 and 22 arranged on the inner surfaces of the first and second cylindrical members 11 and 12 and projecting in the radial direction toward the centers thereof.
Presses the long fiber bundle F in the radial direction of the first and second inner cylinder members 11 and 12.

At this time, the rear end of the first inner cylinder member 11 and the second
The projecting lengths of the projecting portions 23 of the pair of meandering plates 21 respectively arranged at the front end of the inner tubular member 12 are the first and the second.
It is formed to have the same size as the height of the rectangular parallelepiped space cut in the inner tubular members 11 and 12. Therefore, at the rear end of the first inner cylinder member 11 and the front end of the second inner cylinder member 12, the long fiber bundle F passes through the center of the impregnation chamber 10. Further, the protruding lengths of the projecting portions 24 of the three pairs of meandering plates 22 arranged in a zigzag pattern in the central portions of the first and second inner tubular members 11 and 12 are as follows. It is formed to have a size larger than the height of the rectangular parallelepiped space cut in 12. Therefore, the first and second inner cylinder members 11, 12
In the central part of the, the long fiber bundle F, which the meandering plate 21 arranged at the rear end part of the first inner tubular member 11 passes through the center of the impregnation chamber 10, has a protrusion of the three pairs of meandering plates 22, Impregnation chamber 1
It meanders within 0. That is, if the die 1 is used, the setup work for meandering the long fiber bundle F in the impregnation chamber 10 is automatically completed only by integrating the first and second inner tubular members 11 and 12.

After the long fiber bundle F is inserted into the outlet path 51 of the die head 50, the manifold 40 and the die head 50 are respectively attached to the first and second inner cylinder members 11 and 12.
Temporarily fix it to the front and rear ends of. After this temporary fixing work,
The first and second outer cylinder members 31, 32 are respectively
And it makes contact with the outer peripheral surfaces of the second inner cylinder members 11, 12.
Next, the right and left bolt holes 33, 34 of the first and second outer cylinder members 31, 32 in FIG. 1 and the bolt holes 45, 46 of the manifold 40, and the first and second outer cylinder members 31, 32 are illustrated. 1. Bolt holes 35, 36 at the left end in FIG.
And the bolt holes 53 and 54 of the manifold 40 are aligned. After this alignment work, bolts are inserted into the respective bolt holes, and the first and second inner cylinder members 11 and 12, the first and second outer cylinder members 31 and 32, the manifold 40,
The die head 50 and the die back 70 are integrated.

Further, the first and second heaters 61, 6
2 is brought into contact with the outer peripheral surfaces of the first and second outer tubular members 31, 32, respectively. Next, the bolt holes 63, 64 of the first and second heaters 61, 62 are aligned with the bolt holes 37, 38 of the outer peripheral portions of the first and second outer cylinder members 31, 32. After this alignment work, finally, the bolts are inserted into the respective bolt holes, and the first and second inner cylinder members 11, 12 and the first
By assembling the second outer cylinder members 31 and 32, the manifold 40, the die head 50, the first and second heaters 61 and 62, and the die back 70, the assembly of the die 1 shown in FIG. 1 is completed.

The die 1 assembled as described above is attached to a die connecting portion of an extruder (not shown), and a molten resin, for example, molten 6,6 nylon is extruded into the impregnation chamber 10 through the manifold 40 and is The fiber bundle F is fed through the back die 70 and the manifold 40 to the die 1
Then, the long fiber reinforced composite material is manufactured in the same manner as in the conventional manufacturing method. In the impregnation chamber 10, the molten resin is a space formed between the meandering plate 21 and the meandering plate 22, a space formed between the meandering plate 22 and the meandering plate 22, top portions of the meandering plates 21, 22. In addition to the space formed between the inner surfaces of the first and second inner cylindrical members 11 and 12, and the openings 29 and 20 of the meandering plates 21 and 22, the molten resin flows in the meandering plate 21. , 22. As is clear from the above description, the use of the die 1 can significantly simplify the setup work for meandering the long fiber bundles F in the impregnation chamber 10 and improve the efficiency.

[0029]

As described in detail above, in the die for producing a long fiber reinforced composite material of the present invention, the first and second tubular members are projected in the radial direction on the inner surfaces of the first and second tubular members. Since the plurality of meandering means are arranged, the first and second long fiber bundles are stretched between the first and second tubular members.
If the tubular member is integrated, the setup work for meandering the long fiber bundle in the impregnation chamber is automatically completed. That is, the setup work of meandering the long fiber bundles in the impregnation chamber is not completed unless it goes through a plurality of steps, which is remarkably different from the case of using the conventional die for producing a long fiber reinforced composite material. When using the composite material manufacturing die, this setup work is completed in one step. As a result, the long-fiber-reinforced composite material-producing die of the present invention remarkably simplifies the workability of the setup work for causing the long-fiber bundle to meander in the impregnation chamber, and makes it more efficient. Improve the overall productivity of the manufacturing process.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a die 1 which is an example of a die for producing a long fiber reinforced composite material of the present invention, cut along a plane including a central axis thereof.

FIG. 2 shows first and second inner cylinder members 1 forming a main part of the die 1.
1 and 12 are front views and side views thereof.

3A and 3B are a front view and a side view of a meandering plate 21 for causing the long fiber bundle F of the die 1 to meander.

4A and 4B are a front view and a side view of a meandering plate 22 for causing the long fiber bundle F of the die 1 to meander.

5 is a cross-sectional view of a main part of the die 1 taken along a plane including its central axis in order to explain a setup work in which the long fiber bundle F is meandered in the impregnation chamber 10 using the die 1. FIG.

FIG. 6 is a cross-sectional view in which a main part of the die 1 is cut along a plane including a central axis thereof in order to explain a state in which a setup work for causing the long fiber bundle F to meander in the impregnation chamber 10 using the die 1 is completed. is there.

[Explanation of symbols]

1: die, 11: first inner cylinder member, 12: second inner cylinder member,
21: meandering plate, 22: meandering plate, 31: first outer cylinder member, 3
2: Second outer cylinder member, 40: Manifold, 50: Die head, 61: First heater, 62: Second heater, 7
0: Die back

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁵ Identification code Internal reference number FI technical display area // B29K 105: 08

Claims (1)

[Claims] 1. A semi-cylindrical first cylinder member forming one side of an impregnation chamber for impregnating a long fiber bundle with a molten resin, and a semi-cylindrical second cylinder forming the other side of the impregnation chamber. A member, and in the radial direction of the first and second tubular members toward the center of the first and second tubular members, which are arranged in a staggered manner on the inner surfaces of the first and second tubular members. A plurality of plate-shaped meandering means for causing the long-fiber bundle to meander in the impregnation chamber, which has an opening through which the molten resin passes, for manufacturing a long-fiber-reinforced composite material. Die.