FI105261B - Unwinding apparatus with continuous, changing function from reinforced plastic products - Google Patents

Description

105261 CONTINUOUS AND VARIABLE FUNCTIONING OF STRENGTH PLASTIC PRODUCTS

HARDWARE

FIELD OF THE INVENTION The present invention relates to an apparatus for winding fibrous materials of elongated products of reinforced plastic material by which the reinforcing fibers are wound on the surface of the product.

r It is previously known to manufacture tubes, tanks and rolls of reinforced plastic material in which the product is moved in its axial direction and the fibers are wound by means of stationary winding units. The product moves at a constant speed and tangential fibers are fed to the surface of the product from a defibration unit rotating around the product. The axial fibers entering the product surface are guided from the stationary feeder to the periphery of the product.

The solution can make a continuous tubular product. If more fiber layers are desired, more tangential and axial fiber units are added to increase the material thickness. The manufacturing line includes a curing unit, oven or the like on the remainder, the use of which determines the product speed to be kept substantially constant in the axial direction.

When the fiber winding units are stationary in line, the amount of fibers, pitch, or other variation cannot be accomplished in any simple manner in the case of a continuous winding line, e.g., for tubular products.

It is also known to defibrate e.g. cylinders by holding them in place by means of fixed bearings and rotating them during feeding of tangential fibers. To feed the axial fibers, rotation must be stopped. The machine cannot produce a continuous product.

The apparatus of the invention solves the problems encountered in the manufacture of a continuous tubular product and achieves a significant improvement in the formation of the desired fiber directions on the product surface. The invention is characterized by what is stated in the claims.

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An advantage of the invention is the flexibility of the fiber directions provided by the continuous winding, which enables the product moving in the production line to obtain the desired fiber densities, fiber directions or layers at the desired positions as the product moves at a constant speed in the production line. The invention easily provides the product with strength at the required points, thickness such as shoulders wherever desired, and fibers directed in the most structurally advantageous directions on the product surface. With the device according to the invention, even conventional winding can be carried out completely normally, thus maintaining a wide application range.

In the following, the invention will be explained in more detail with reference to the accompanying drawing, in which

Figure 1 is a side view of the winding apparatus of the invention comprising two pairs of winding units.

Figure 1 shows a portion of the apparatus according to the invention where the reinforcing fiber winding units are located. An article made of reinforced plastic material, such as tube 3, passes through one or more winding units. The frame 4 of the apparatus consists of vertical and horizontal beams. On the frame beams are placed guides 6 parallel to the product 3 so that the winding units are movable along them.

Fig. 1 shows an axial unit 1 as a fiber-feeding unit on the surface of the product 3 in the axial direction, consisting of a group of reinforcing fiber coils 9 and a fiber supply ring 5. The fibers are preferably glass or carbon fibers known per se.

In the tangential direction to the product surface, the fiber feed unit is a tangential unit 2 consisting of a non-rotatable body portion 10 and a fiber roll portion 8 rotatable around the product.

Each unit 1 and 2 are movable by the carriages 7 on the guide rails 6. Corner profiles are shown as guides. The moving equipment of the units 1,2 is a known mechanism, such as a propeller, a rack and pinion, a traction motor or, for example, a motion cylinder. Units 1 and 2 are separately movable. In Fig. 1, the first port shown in Figure 1 is movable. In Figure 1, the first pair of units 1 and 2 shown on the right rewind the first layers to the product and the latter pair the next layers.

The movement of the units is controlled by the control panel of the equipment (not shown). The control center is aware of product advancement and, based on this, controls the direction and speed of the units 1,2 in order to achieve the desired fiber shape on each floor. In addition, the control center controls the unit to either feed the fiber or maintain a feed break.

The first units begin to wind the fiber either over the mandrel, either at the beginning of the line or at the core, which moves and stays inside the tube to the end of the line. The unit 1 feeds the axial fibers into the product and can move, making room for the unit 2 to obtain a long motion in the axial direction. The unit 1 can feed the axial fibers by means of the ring 5 in either direction. Regardless of the drawing, the fibers are evenly distributed throughout the ring.

The unit 2 can move and wind the tangential fiber as desired in the region which is available in the axial direction thereof. It can be moved substantially faster than the velocity of the product 3 on the line, allowing it to coil in and out of the direction of movement of the product and also to make intermediate shifts if necessary.

In unit 2, for example, the rotational speed of the spools 8 is kept constant as they are rotated when fiber shapes are created on the product surface by adjusting the movement of unit 2. The reels can be rotated in either direction and, on the other hand, by adjusting their speed of rotation, the fiber forms are affected if the speed of motion of the unit T '2 is kept constant. Naturally, the winding may also be effected by simultaneously controlling the speed of the unit 2 * and the rotation speed of the reel 8.

Each unit 1 and 2 has such a long range of motion in the guides 6 that it partially overlaps the range of the next corresponding units 1 and 2 of the line.

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The line contains the necessary number of winding units in succession, and at the end or sometimes also a curing unit, e.g.

The apparatus according to the invention easily produces pipes of variable diameter, pressure pipes, columns, taking into account their stress and load points. The fiber directions are easy to implement as required, and for example axial fibers can be fed into a diameter region in a desired number of layers with reciprocating movements as the product moves at a constant speed. Naturally, tangential fibers can be wound between the axial layers 2. When making conical columns as a continuous product in succession, a diameter conversion is performed for each column unit, and there is also a possible fiber orientation conversion. The apparatus according to the invention is particularly well suited for the preparation of such a point, and when the poles are separated from one another, only a minimal part has to be sawn off between the poles.

The invention is not limited to the following embodiment, but many modifications are possible within the scope of the inventive idea defined by the claims.

Claims (6)

A continuous and variable reeling apparatus for reinforcing plastics products, wherein the product moves axially during winding, comprising a body (4) and at least one unit (1) for axially fiber feeding onto the surface of the product (3) and at least one tangential fiber to the product surface. a feed unit (2) and a control center for controlling said units, characterized in that the apparatus comprises axially extending guides (6) for the product (3) and moving means (1) and (2) for moving said units on the guides (6). ) during winding in the desired direction and at the desired speed, controlled by the control center, and that the winding apparatus (8) of the unit (2) is rotatable about the product (3) in either direction. Apparatus according to claim 1, characterized in that, as the product (3) moves through the device during winding, the axial movement of the movable unit (2) results in a uniform or variable fiber structure or several layers on the surface of the product. Apparatus according to claims 1 and 2, characterized in that the unit (2) is movable with the product (3) in the same direction, whereby the fibers are either wound. to obtain a thicker material position, or the fibers are not wound, in the case of axial displacement of the unit (2). Apparatus according to one of the preceding claims 1 to 3, characterized in that the unit (1) or (2) is movable parallel to the product (3) at a speed higher than the product speed, with the unit (1) or (2) executable as the product moves. Apparatus according to one of Claims 1 to 4, characterized in that the movement areas of the successive units (1) or (2) partially overlap. 6 105261