JPH07266438A - Filament winding and device therefor - Google Patents

Abstract

PURPOSE:To provide a filament winding, by which the production efficiency has been improved, which flexibly copes with the production of various shaped FRP molded article and can wind filament under the condition that winding pattern is properly changed in response to dynamic requirements. CONSTITUTION:At the winding of filament 20 on a mandrel 13 under the condition that the filament 20 is reciprocated to the direction of the axis of the mandrel 13, a plurality of winding-up positions 11a and 11b of the filament 20 to the mandrel 13 are allowed to be set to the axis direction of the mandrel 13.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filament winding molding method and apparatus, and more particularly, to a tubular fiber-reinforced synthetic resin molding (hereinafter referred to as FRP) by winding a filament around the mandrel as a molding core. The present invention relates to a filament winding molding method and apparatus for forming the same.

[0002]

2. Description of the Related Art FRP is formed by, for example, winding a filament impregnated with a B-stage thermosetting resin on a mandrel to a predetermined thickness, winding a wrapping tape, and heating to give a heat shrinking force of the wrapping tape. However, after the thermosetting resin is cured, it is released from the mold.

Conventionally, as a technique relating to a method for molding an FRP material, two bobbins 2a and 2b are rotated in opposite directions while running a hollow tube (mandrel) 1 as shown in FIG. A method of laminating and winding (for example, Japanese Laid-Open Patent Publication No. 55-95535), and as shown in FIG. 4, the traverse 5 is reciprocally moved while rotating the mandrel 4 having a constant size, and the filament 6
And a method of winding them in a cross shape (for example, JP-A-57-49).
No. 522) has been proposed.

By the way, FRP has been used in various fields because it has a higher specific strength and a higher specific elastic modulus than materials made of only metal or resin. Of these, FRP materials used as reinforcing parts for automobile propeller shafts and rolls require high strength, so the orientation direction of the filaments is restricted, and the filaments are not cut at both ends of the material. Must be continuous. In addition, it is necessary to find out the optimum condition of the winding pattern to be wound according to the mechanical performance requirements such as specific strength and specific elastic modulus.

However, the method shown in FIG. 3 requires two bobbins 2a and 2b which rotate in opposite directions, which is not only complicated in terms of equipment but also requires a space for winding two steps of filaments. There are some problems.

Further, in the method shown in FIG. 4, since the mandrel 4 has a constant size, filament continuity can be obtained, but since the mandrel is wound for each mandrel, continuous production is required for mandrel replacement or the like. It is difficult and the production efficiency is extremely poor.

Therefore, as one of means for solving the above problems, a proposal as disclosed in, for example, JP-A-59-114025 is proposed. The proposal describes a method of continuously winding a plurality of filaments for each cutting length on a mandrel that is rotated while being continuously extruded. In this method, the mandrel is extrusion-molded and continuously fed into the winding section in the direction of the rotation axis. Therefore, the continuity of the filament is also obtained, and the productivity is improved.

[0008]

However, in the above proposal, the part of the mandrel which is not reinforced by the filament is integrated into a FRP molded product, and the shape and size of the mandrel for continuous extrusion molding. It is difficult to change the winding pattern, and it is difficult to change and wind the winding pattern in various ways depending on the mechanical performance required.

The present invention focuses on the above problems,
Filament winding molding method and apparatus for FRP molding capable of increasing production efficiency, flexibly responding to the production of various shapes of FRP molded products, and winding filaments by appropriately changing the winding pattern according to mechanically required performance. The purpose is to provide.

[0010]

Means and Actions for Solving the Problems The filament winding molding method of the present invention for this purpose is to reciprocate the filament along the axial direction of the mandrel, and to wind the filament on the mandrel. The method comprises setting a plurality of winding positions of the filament around the mandrel in the axial direction of the mandrel.

The winding position is set based on an instruction signal from the control device.

The winding pattern of the filament wound around each winding position can be set independently based on a signal from the control device.

That is, when the filament is wound around the mandrel by reciprocating the traverse portion within the length of the mandrel, there are at least two winding positions. (EN) A filament winding molding method in which a position and a winding pattern wound around each winding position can be set by an instruction from a control device.

Further, the filament winding molding apparatus of the present invention which meets the above object is a filament winding molding apparatus in which a filament is reciprocated along the axial direction of a mandrel to wind the filament on the mandrel. It is characterized in that a plurality of winding positions of the filament to the winding direction are set in the axial direction of the mandrel, and a control device that can independently set the winding pattern of the filament to each winding position is provided.

The winding section in the present invention comprises a mandrel, a gripping tool for gripping the mandrel, a winding shaft for rotationally driving the gripping tool, and a rotary drive source for driving the winding shaft. It is for winding the filament around the mandrel by rotation.

The traverse portion refers to a portion for traversing filaments, for example, resin-impregnated filaments supplied to the winding portion, and a resin tank for impregnating the filaments with resin is attached, if necessary. There is. As the drive means of the traverse portion, it is possible to attach the drive means to the traverse portion itself, and the moving means to which the traverse portion is attached may have a drive function to reciprocate the traverse portion.

The moving means is for moving the traverse portion to each winding position so that the yarn can be sequentially and alternately supplied to the plurality of winding positions. For example, there is one in which a rail is installed parallel to the winding shaft of the winding section, and a traverse section is placed on or suspended from the rail to serve as a movement guide, which is moved by a known drive device.

The "winding position" is a position where the traverse portion can wind the filament while reciprocating the filament within the winding range of the winding portion.

"Sequentially" means a schedule for moving the traverse section to a plurality of winding positions in the desired position in the desired order. That is, the winding operation is performed sequentially for a plurality of winding positions by moving the traverse unit according to a predetermined schedule.

The "control device" is a winding position required for winding,
A setting device that sets winding conditions such as winding patterns, and a memory, a CPU, and peripheral circuits to calculate traverse speed, winding mandrel rotation speed, etc. from the winding conditions input to the installation device. And an amplifier that amplifies the command signal calculated by the arithmetic processing unit to a signal that can be transmitted to each driving machine. The setting device has a function of inputting winding conditions and monitoring a winding state by a known computer. The setting device also has a function of activating and deactivating the filament winding molding device.

The take-up position can be set by the control device according to the shape of the molded product, the shape of the mandrel, and the like.
Further, the winding pattern to be wound around each winding position can be set from the control device.

The "winding pattern" is a pattern formed by adjusting the rotational speed of the mandrel and the moving speed of the traverse, and parallel winding, helical winding, and polar in-plane winding can be formed. Depending on the shape of the molded product and the mechanically required performance, any one of them or a combination thereof may be used. Further, when setting the winding pattern, it is possible to set the winding angle, the yarn speed, and the number of winding layers together.

The "winding angle" is the winding angle of the filament with respect to the mandrel, and the "thread speed" is
It is used by the control device to calculate the mandrel speed and the traverse speed.

The "number of winding layers" is set by winding the resin-impregnated filament to obtain a predetermined thickness. Further, the number of windings of each winding pattern is set when the winding pattern is used together depending on the shape of the molded product and the mechanically required performance.

[0025]

In the filament winding molding method according to the present invention, since plural winding positions are set in the direction along the axis of the mandrel around which the filament is wound,
The filament is first wound on the mandrel at one winding position, and when winding at the winding position is completed, winding at another winding position is subsequently started. In this way, the filament is sequentially wound at the plurality of winding positions set on the mandrel. Therefore, the number of mandrel exchanges is greatly reduced, continuous production is possible, and production efficiency is improved.

Further, since the winding position is set by an instruction from the control device, the position can be easily changed, and moreover, the accurate positioning can be performed, and the winding accuracy of the filament is improved.

Further, since the winding pattern of the filament can be easily set by the instruction from the control device, the winding of the filament in the winding pattern according to the mechanical performance can be performed quickly and surely.

Further, in the filament winding molding apparatus according to the present invention, since a plurality of filament winding positions are set in the axial direction of the mandrel, the mandrel replacement frequency is reduced and continuous production is possible.
The production efficiency can be improved. Also, the winding position and the winding pattern at each winding position are set independently and optimally by the instruction from the control device, so that the filament winding accuracy is improved and high quality satisfying the mechanical performance is achieved. The filament winding molded article of is obtained.

[0029]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a filament winding molding apparatus according to an embodiment of the present invention. In the filament winding molding apparatus of FIG. 1, the winding unit 10
Are arranged in the axial direction of the winding shaft 12. Winding section 10
Is a gripping tool 14 for gripping the mandrel 13, a winding shaft 12 to which the gripping tool 14 is attached, and the winding shaft 1.
It has a rotary drive source 15 for rotating 2. A mandrel 13 is attached to the winding unit 10. On the mandrel 13, winding positions 11a and 11b for winding the filament along the axial direction are set.
In this embodiment, two winding parts 11a and 11b are provided on the mandrel 13. The number of winding positions set is not limited to this, and the mandrel 13
If it is above, it can be set to an arbitrary number.

The traverse section 16 is opposed to the winding section 10.
A moving means 17 for guiding the vehicle is provided. The moving unit 17 has a rail 18 and a drive source 19 (for example, a reversible rotation motor), and the traverse unit 1 is provided on the rail 18.
6 is listed. The rail 18 is arranged so as to face the winding section 10 and substantially parallel to the winding shaft 12, and to move the traverse section 16 to the winding positions 11 a and 11 b of the winding section 10.
It is a guide to move sequentially.

A filament 20 is provided in the traverse section 16.
A filament head 27 for feeding yarn is provided. A resin tank 21 for impregnating the filament 20 with a thermosetting resin is provided above the filament head 27. When the resin-impregnated filament 22 is fed to the mandrel 13, the traverse section 16 is incorporated in the traverse section 16 itself (for example, a ball screw (not shown) connected to the drive source 19 described above and A nut that engages it is reciprocated along the rail 18 on the rail 18 for traverse. The reciprocating movement is controlled by an instruction from the control device 23.

The controller 23 sets the winding positions 11a and 11b for winding the filament, the setting device 24 for setting winding conditions such as the winding pattern, and the setting device 2.
In order to calculate the moving speed of the traverse section 16, the rotation speed of the mandrel 13 of the winding section 10, etc. from the winding conditions input to 4, the arithmetic processing section 25 having a memory, a CPU and peripheral circuits, and the arithmetic processing section 25. The amplifier 26 that amplifies the command signal calculated in step 1 to a signal that can be transmitted to each drive source. The setting device 24 has a function of inputting winding conditions and monitoring a winding state by a known computer. The setting device 24 also has a function of operating and stopping the filament winding molding device itself.

Further, a pulse generator (not shown) attached to the rotary drive source 15 of the winding section 10 and the drive source 19 of the moving means 17 electrically controls the pulse corresponding to the rotational speed of each drive source. It is fed back to the device 23, and speed and position control according to a command signal from the control device 23 is performed.

The winding positions 11a and 11b and the filament winding pattern at each winding position are individually set by inputting different data to the setting device 24.
That is, the winding positions 11a and 11b and the winding patterns of the filaments corresponding to the winding positions 11a and 11b are independent of each other, and different winding winding patterns can be set at the winding positions 11a and 11b.

Examples of the thermosetting resin in the resin tank 21 for impregnating the filament 20 with resin include epoxy resin, unsaturated polyester resin, phenol resin, polyimide resin and the like. However, the resin with which the filament 20 is impregnated is not limited to the thermosetting resin, and a thermoplastic resin can also be used. Examples of the thermoplastic resin include polyester and polyamide.

In the apparatus of the above embodiment, the filament winding molding method according to the present invention is carried out as follows. FIG. 2 shows a flowchart of the filament winding molding method of the present invention. First, the mandrel 13 is attached to the winding section 10 via the gripping tool 14. Subsequently, the required winding preparation work is performed (winding preparation completion).

When the winding preparation is completed, the winding position data necessary for winding, the winding pattern data for winding at the winding position, the winding angle θ, the yarn speed V, the number of winding layers, the yarn width, The mandrel diameter D and the winding schedule are input from the setting device 24 of the control device 23 (step 1).
In addition, the winding schedule of the embodiment is the winding position 11
a and the winding position 11b were set in this order.

Based on the input winding position data, winding pattern data, etc., the computer of the setting device 24 internally calculates the winding position 11a, the winding position 11b, and the winding position 11b.
A combination of winding patterns to be wound around the winding position is calculated. In addition, the moving speed Tv of the traverse section 16 and the mandrel rotation number M of the winding section 10 are calculated by internal calculation.
n and the like are also calculated. Each calculated data is transmitted and stored in the memory of the arithmetic processing unit 25 (not shown) of the control device 23 (step 2). The calculated moving speed Tv of the traverse section 16 and the mandrel rotation speed Mn are expressed as follows. Tv = V × cos θ (m / min) Mn = V × sin θ / πD (rpm) The input operation to the setting device 24 may be performed before the winding preparation.

Next, the moving means 17 is operated by an instruction from the setting device 24, and the traverse section 16 is moved from the standby position to
The winding position 11a for the first winding according to the schedule
Move to position. When the traverse section 16 moves to a predetermined position, the filament 20 not impregnated with resin is taken out, and the filament 20 is impregnated with a thermosetting resin in a resin tank 21 to form a resin impregnated filament 22.
The mandrel 13 is fed. Resin impregnated filament 22
After winding and fixing the tip of the device around the mandrel 13, whether or not to start winding is determined (step 3). When it is determined in step 3 that winding can be started, a winding start command is issued from the setter 24, and the winding unit 1 calculated by the setter 24 is calculated.
The rotation speed command of 0 and the moving speed command of the traverse section 16 are amplified by the amplifier 26 and transmitted to the drive sources 15 and 19 (step 4).

When it is determined in step 3 that the winding start is impossible, the winding condition data is re-input (step 9). When the data input defect is corrected in step 9, the process returns to step 1.
However, if the data input defect is not corrected, the winding is forcibly ended (step 6).

Following step 4, the mandrel 13 is rotated via the winding shaft 12. At the same time, the traverse section 16
Starts to feed the yarn while traversing the resin-impregnated filament 22. Mandrel 1 instructed by control device 23
The resin-impregnated filament 22 is wound around the winding position 11a of the mandrel 13 in a desired winding pattern by adjusting the rotational speed of 3 and the traverse movement speed (step 5).

Then, the completion of winding is confirmed (step 6). If the completion of winding cannot be confirmed in step 6, the operations in steps 4 to 6 are repeated.
When the winding at the winding position 11a is completed and the completion of the winding is confirmed in step 6, then the completion of the winding schedule is confirmed (step 7). When the winding schedule is not completed, it is judged whether or not the re-input operation of the winding condition is necessary (step 10), and if not, the winding position 11b.
Up to the moving means 17, the yarn feeding traverse section 16 is moved, and after the movement, predetermined winding is performed (steps 4 to 6). When it is determined in step 10 that the winding condition needs to be changed, the process returns to step 1 and the input operation is performed.

When the completion of the winding schedule is confirmed in step 7, the winding end command is input to the setter 24, the rotation speed command of the winding unit 10 and the moving speed command of the traverse unit 16 are stopped, The winding operation is completed (step 8).
That is, unless the winding command is continuously issued from the setter 24, the winding schedule is not completed, and the winding conditions are not changed, the above steps 4 to 6 are repeated.

When all the winding schedules input to the setting device 24 are completed, the winding operation is completed. After the terminal process, the traverse unit 16 is moved to the standby position by the moving means 17. Then, the removal of the mandrel 13 that has completed the winding operation and the preparation work for winding the next mandrel are started.

The number of winding positions, the winding pattern wound around the winding position, and the traverse schedule are as follows:
It can be arbitrarily set according to the production plan, the shape of the molded product, and the required mechanical performance. The shape of the filament wound on the mandrel is FR such as roving or tape.
A desired shape for P molding can be adopted.

Next, the following winding test was carried out using the apparatus of this embodiment. The input conditions were set as follows.
The mandrel 13 has a total length of 2500 mm and an outer diameter of 92 mm,
A position where the tip of the resin-impregnated filament 22 is wound around the mandrel 13 and fixed (hereinafter referred to as a threading position).
At the winding position 11a, from the end of the mandrel 13 to 17
0 mm, threading position of winding position 11b, mandrel 1
1070 mm from the end of 3, and the winding position 11a,
Setting device 24 with each winding position 11b set to 900 mm
Entered from.

Next, the number of rovings is 6, the yarn speed is 30 m /
The winding pattern to the winding position 11a, the helical winding ± 11 degrees three layers, the parallel winding one layer, the helical winding ± 11 degrees three layers, the parallel winding one layer, the helical winding ± 14 degrees. One layer and tape winding are set as one layer. Then, at the winding position 11b, two layers of ± 14 degrees with helical winding,
One layer was set for parallel winding, two layers for ± 14 degrees in helical winding, one layer for parallel winding, three layers for ± 11 degrees in helical winding, and one layer for tape winding, and input from the setting device 24. Further, the winding schedule of the traverse unit 16 is in the order of the winding position 11a and then the winding position 11b.

The FRP was molded according to the flow chart of FIG. 2 and heated to cure the thermosetting resin while applying the heat shrinkage force of the tape, and then the mold was removed. As a result, it was possible to mold two types of FRP molded products having different mechanical properties in a shorter time than the conventional method.

[0049]

As described above, according to the filament winding molding method and apparatus of the present invention, a plurality of winding positions are set within the length of the mandrel, and the winding positions and the respective winding positions are set. The winding pattern to be wrapped around can be set independently by an instruction from the control device. Therefore, as compared with the conventional filament winding molding apparatus in which the winding unit and the yarn feeding traverse unit correspond to each other in a one-to-one correspondence, the winding pattern can be changed in various ways depending on the required mechanical performance, and the mechanical properties can be improved. Different FRP molded products can be molded on the same mandrel, the winding conditions can be optimized in a short time, and the production efficiency can be improved. Further, it is possible to flexibly deal with the manufacture of FRP molded products having various shapes and characteristics.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a filament winding molding apparatus according to an embodiment of the present invention.

FIG. 2 is a flow chart relating to control during filament winding of the apparatus of FIG.

FIG. 3 is a schematic front view of a conventional filament winding molding apparatus.

FIG. 4 is a schematic front view of another conventional filament winding molding apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 winding part 11a, 11b winding position 12 winding shaft 13 mandrel 14 grasping tool 15 rotary drive source 16 traverse part 17 moving means 18 monorail 19 drive source 20 filament 21 resin tank 22 resin impregnated filament 23 control device 24 setting device 25 Arithmetic processing unit 26 Amplifier 27 Filament head

Claims (4)

[Claims] 1. When the filament is reciprocated along the axial direction of the mandrel and the filament is wound around the mandrel, a plurality of winding positions of the filament around the mandrel are set in the axial direction of the mandrel. Characteristic filament winding molding method. 2. The filament winding molding method according to claim 1, wherein the plurality of winding positions are set by an instruction from a control device. 3. The filament winding molding method according to claim 1, wherein the winding patterns of the filaments wound around the plurality of winding positions are set by an instruction from a control device. 4. A filament winding molding apparatus for winding a filament on a mandrel by reciprocating the filament along the axial direction of the mandrel.
The apparatus is provided with a control device capable of setting a plurality of winding positions of the filament around the mandrel in the axial direction of the mandrel and independently setting a winding pattern of the filament at each winding position. Filament winding molding equipment.