JPH01259929A - Heating and pressure fixing device for thermoplastic composite material tape - Google Patents

Abstract

PURPOSE:To weld to a mandrel with uniform thickness and at winding angle even a specially large mandrel, and laminate by positioning continuously at the end of a preheating section, pressing a material tape in the heated state through a pressing mechanism to the surface of a mandrel and welding the same to the surface of the mandrel. CONSTITUTION:Both ends of a mandrel 14 are supported by a chuck 17 of a filament winding processing machine and rotated, and a material tape 4 wound around a material tape roll 5 retained by a material roll retaining section 6 of a heat and press fixing device 1 is drawn out with the given tension following the rotation of the mandrel 14. Said material roll drawn out is preheated in a preheating section 9 up to the melting temperature and fed to a melting prefixing section 10, and pressed to the mandrel 14 while being melted with the heat of said melting pressure fixing section 10, and the material tape 4 is wound around the mandrel 14 and welded. Regardless of the change of the size of the mandrel, the material tape is heated up almost uniformly to the melting temperature in the preheating section, and can be directly fed to the melting pressure fixing section in the heated state and welded to the mandrel.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention provides the above-mentioned method by attaching a composite tape made of a mandrel made of steel or the like impregnated with a thermoplastic resin to a processing machine for filament winding. This invention relates to a thermoplastic composite tape friction bonding device for welding and welding a material tape to the surface of a mandrel, particularly an apparatus that is optimal for use with large mandrels such as aircraft fuselages.

(Prior Art) Generally, the welding of a composite material tape to the mandrel is performed by rotating the mandrel, supplying the material tape under a certain tension from the delivery eye of the filament supply unit, and winding the material tape around the mandrel. It was common practice to reciprocate the eye axially over the length of the mandrel.

However, in the above case, it is generally difficult to uniformly wind the material tape around the mandrel and to weld it together due to changes in the size, shape, etc. of the mandrel.

For this reason, for example, as JP-A-58-101016,
The number of revolutions of the rotation axis of the mandrel and the drive screw shaft of the delivery eye are sequentially and alternately measured, and the rotation angle of the mandrel and the traverse distance of the delivery eye are sequentially and alternately controlled. Various methods have been proposed in which a material tape is preheated with an electric heater or a hot air heater, the material tape is supplied from a delivery arm in this heated state, and is wound around a mandrel and welded.

(Problem to be Solved by the Invention) However, in the method disclosed in JP-A-58-101016, etc., in which a material tape is wound around a mandrel at room temperature, the viscosity of the material tape resin is high, so that the material tape is If the fibers are not lined up evenly and overlap each other, making the thickness uneven, or if the fibers separate and create gaps between them, winding in this condition will cause excessive winding. This results in a skin with many unevenness and gaps, which reduces the quality of the product.

In addition, as described in Japanese Patent Publication No. 60-55296, when the material tape is heated only with an electric heater or hot air heater and wrapped around a mandrel, the quality is improved compared to the above case at room temperature, but the size of the mandrel is Since the supply speed of the material tape cannot follow changes in the material tape, it not only causes uneven heating and defects similar to those described above, but also as the mandrel becomes large, the winding from the delivery eye to the mandrel becomes difficult. As the distance to the point becomes longer, the viscosity of the material tape increases during this time, causing slippage during winding, making it impossible to evenly wrap the material tape around the mandrel, resulting in uneven lamination. Furthermore, if a guide roll or the like is interposed between the material tape and the mandrel, the tension of the material tape becomes nonuniform, resulting in a problem that the laminated thickness becomes uneven.

In view of the above, the present invention provides a material tape that can be reliably melted while heating and welded and laminated to the mandrel with a uniform thickness and winding angle, even on a particularly large mandrel. The purpose is to

(Means for Solving the Problems) In order to achieve the above object, the thermocompression bonding device of the present invention is a thermocompression bonding device that is attached to a machine head that can freely control the position of a filament winding processing machine for composite materials. A material roll holding part that rotatably holds the tape roll so that the material tape is pulled out from the roll with a predetermined tension, and a preheating part that preheats the tape by inserting the material tape pulled out from the roll inside. and a melt-pressing part that is located continuously at the tip of the preheating part and presses the material tape in a heated state onto the surface of the mandrel via a pressing mechanism to weld it to the surface of the mandrel. It is.

(Function) According to the present invention configured as described above, the material tape wound around the material tape roll held by the material roll holding section is pulled out with a predetermined tension, regardless of the size of the mandrel. , this pulled material roll is
The material is preheated in the preheating section, and supplied while being preheated to the melting and pressing section, where it is melted by the heat of the melting and pressing section, and is pressed against a mandrel to be welded. This makes it possible to reliably melt and press the material tape while preventing slippage and laminating it on the mandrel at a constant thickness.

(Example) Hereinafter, the present invention will be described in detail with reference to the drawings.

The thermocompression bonding apparatus 1 according to the present invention includes a base 2 consisting of an inclined plate 2a and horizontal plates 2b arranged on both sides of the inclined plate 2a.
A pair of pillars 3 are erected approximately at the center of the base 2.

Both ends of a material roll holding section 6 that rotatably holds a material tape roll 5 wrapped with a material tape 4 of a composite material are supported by this support 3, and the bearings of this material holding roll 6 are provided with tension. A control device (not shown) is incorporated, and when a predetermined tension is applied to the material tape 4 wound around the material tape roll 5, the material tape 4 is pulled out, and the tension of the material tape 4 being processed is controlled. The material tape 4 is constructed so as to maintain its suitability and to prevent the material tape 4 from loosening due to changes in the feeding speed of the material tape 4.

A direction changing guide roller 7 is provided at the rear end of the inclined plate 2a, and the material tape 4 pulled out from the material tape roller 5 is first pulled out rearward, and is wound around this direction changing guide roller rough to be wound on the inclined plate 2a. It is designed to be guided forward along the slope of the plate 2a.

A preheating section 9 equipped with a preheating heater tube 8 for preheating the material tape 4 over almost the entire length in the length direction is provided on the upper surface of the inclined plate 2a, and the material tape 4 guided here is configured to pass through the inside of this preheating heater tube 9 to be supplied with radiant heat and heated to near the melting temperature.

At the tip of the horizontal plate 2b, a melt pressure bonding part 10 is provided continuously to the preheating heater tube 8 of the preheating part 9.

A hot iron 11 is provided at the lower end of the melting and crimping unit 10, and is configured to have a built-in resistance wire (not shown) and be heated to, for example, 500° C. by the resistance wire. This hot iron 11 is urged downward via a pressure spring 12, and a pressure detection sensor 13 is attached to this pressure spring 12 to detect the pressure caused by this.

This melting and crimping unit 10 melts the material tape 4 preheated by the preheating unit 9 with a hot iron 11, and at the same time uses a pressurizing spring 12 that urges the hot iron 11 downward. This is for welding this to the mandrel 14 by pressing it against the mandrel 14 with a force of .

The heat compression bonding device 1 is used by being attached to the upper surface of a machine head 16 at the tip of an arm 15 of a filament winding machine.

That is, this machine head 16 is configured to be able to freely control positions such as movement in the x, y, and z axis directions and rotation around these axes. By attaching the mandrel 14
Changes in the size of the machine head 16 are regulated and dealt with only by multi-axis control of the machine head 16, excluding changes in the coordinate system within the thermocompression bonding apparatus 1.

As shown in FIG. 2, both ends of the mandrel 14 are supported by the chucks 17 of the filament winding processing machine and rotated, and the material tape roll 5 held by the material roll holding section 6 of the heat and pressure bonding device 1 is removed. The raw material tape 4 is pulled out with a predetermined tension as the mandrel 14 rotates, and the pulled-out raw material roll is preheated to the melting temperature in the preheating section 9 and supplied to the melting and pressing section 10. The material tape 4 is melted with heat of 10° C. and pressed onto the mandrel 14, thereby winding the material tape 4 around the mandrel 14 and welding it.

(Effects of the Invention) Since the present invention has the above-described configuration, the material tape is heated almost uniformly to the melting temperature in the preheating section, regardless of changes in the size of the mandrel, and the material tape is directly heated while being heated. It can be supplied to a melt crimp section to weld it to the mandrel.

Therefore, the viscosity is increased with a uniform viscosity, and the material tape can be wound around the mandrel while maintaining this high viscosity, preventing misalignment and achieving a more uniform lamination thickness and winding angle, thereby improving quality. At the same time, it is possible to save material by eliminating the need for a safety thickness greater than necessary.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, with the first figure being a front view and the second figure being a front view.
The figure is a perspective view showing the state of use. 1... Heat pressure bonding device, 4... Material tape, 5...
Material tape roll, 6...Material roll holding section, 8...
・Preheating heater, 9... Preheating part, 10... Melting pressure bonding part, 11... Hot iron, 14... Mandrel,
16...Machine head. Applicant's agent Mr. Sato

Claims (1)

[Claims] A heating and pressing device that is attached to a machine head of a filament winding processing machine for composite materials whose position can be freely controlled, and which rotatably holds a material tape roll so that the material tape is pulled out from the roll with a predetermined tension. A holding part, a preheating part that preheats the tape by inserting the material tape pulled out from the roll, and a preheating part that is located continuously at the tip of the preheating part and heats the material tape via a pressing mechanism. 1. An apparatus for hot-pressing a thermoplastic composite tape, comprising: a melt-pressing unit that presses the tape onto the surface of a mandrel to weld it to the surface of the mandrel.