TWI444513B - Braiding platform and three dimensional braider - Google Patents

Description

Weaving platform and three-dimensional knitting machine

The present invention relates to a woven platform and a three-dimensional knitting machine using the same, and in particular, to a woven platform capable of knitting a tubular woven fabric and a three-dimensional knitting machine using the woven platform.

The weaving technique was originally used for fabrics, which formed a flat fabric by interlacing the threads by a specific weaving method. In the composite structure, the fabric is often used as a reinforcement type, which has been widely used in various fields, such as automobile, aviation, navigation, aerospace or medical treatment.

In the conventional two-dimensional laminated composite structure, the lack of interlayer strength is often a major disadvantage, and the three-dimensional structural type composite can greatly improve this disadvantage, but most of the three-dimensional structure is strengthened in the thickness direction. And often sacrifices the structural strength of the in-plane, which is due to the decrease in fiber content, and the three-dimensional braid woven by the three-dimensional weaving technique has a fiber volume content of the composite material much higher than that of the composite material. The general three-dimensional structure type composite material, so its structure can not only maintain the plane strength, but also greatly improve the interlayer strength. Further, if it is applied to an ablation resistant material structure and woven with carbon fibers, the high fiber content characteristics of the three-dimensional knitted fabric are more advantageous because the carbon fibers provide relatively excellent ablation resistance.

In the prior art, the determinant three-dimensional weaving technique has been able to weave a solid three-dimensional woven structure, however, this technique is not applicable to the woven fabric of the hollow circular tube structure. For 3D C/C spray throat applications or other tubular structure applications, it is necessary to develop a new three-dimensional weaving technique that can be used to braid tubular braids.

Accordingly, it is an object of the present invention to provide a woven platform for a three-dimensional knitting machine by which three-dimensional weaving of a tubular woven fabric can be performed to solve the above problems.

According to a specific embodiment, the woven platform of the present invention comprises N annular bodies, M inner ring cylinders, M outer ring cylinders, a first actuator and a second actuator, wherein N and M are positive integers .

In this embodiment, each of the annular bodies has a different radius, and the annular bodies are arranged relative to an axis to form an annular plane. Each of the annular bodies has M spindle slots distributed on the annular body, and the spindle slots of each annular body can communicate with each other, and M spindle grooves are formed on the annular plane, wherein the spindles The grooves may be radially distributed with respect to the axis.

The inner ring cylinder is disposed in the inner ring of the annular plane, that is, adjacent to the annular body having the smallest radius. The inner ring cylinders are respectively aligned with the respective spindle grooves, which can be used to alternately push the spindle of the three-dimensional knitting machine outwardly in the spindle groove. On the other hand, the second cylinder group of the outer ring is disposed on the outer circumference of the annular plane, that is, adjacent to the annular body having the largest radius. The outer ring cylinder sets are respectively aligned with the respective spindle grooves, which can be used to alternately push the spindle of the three-dimensional knitting machine to move inwardly in the spindle groove.

The first actuator can be coupled to the first set of annular bodies in the annular body that can control the first set of annular bodies to rotate an angle in a clockwise or counterclockwise direction. The second actuator can be coupled to the second set of annular bodies in the annular body, which can control the second set of annular bodies to rotate an angle in a counterclockwise direction or a clockwise direction, wherein each of the second set of annular systems The first set of rings is in a staggered motion.

Another aspect of the present invention is to provide a three-dimensional knitting machine comprising N annular bodies, ((N-1)×M) spindles, M inner ring cylinders, M outer ring cylinders, first actuation And a second actuator, wherein N and M are positive integers.

In this embodiment, each of the annular bodies has a different radius, and the annular bodies are arranged relative to an axis to form an annular plane. Each of the annular bodies has M spindle slots distributed on the annular body, and the spindle slots of each annular body can communicate with each other, and M spindle grooves are formed on the annular plane, wherein the spindles The grooves may be radially distributed with respect to the axis.

The inner ring cylinder is disposed in the inner ring of the annular plane, that is, adjacent to the annular body having the smallest radius. Each of the inner ring cylinders is respectively aligned with each of the spindle grooves, which can be used to alternately push the spindles outwardly in the spindle grooves. On the other hand, the outer ring cylinder group is disposed on the outer circumference of the annular plane, that is, adjacent to the annular body having the largest radius. Each of the outer ring cylinders is respectively aligned with each of the spindle grooves, which can be used to alternately push the spindle of the three-dimensional knitting machine to move inwardly in the spindle groove.

The first actuator can be coupled to the first set of annular bodies in the annular body that can control the first set of annular bodies to rotate an angle in a clockwise or counterclockwise direction. The second actuator can be coupled to the second set of annular bodies in the annular body, which can control the second set of annular bodies to rotate an angle in a counterclockwise direction or a clockwise direction, wherein each of the second set of annular systems Each of the first set of annular bodies is in a staggered motion.

The advantages and spirit of the present invention will be further understood from the following detailed description of the invention.

Please refer to FIG. 1. FIG. 1 is a schematic view showing a weaving platform 1 according to an embodiment of the present invention. The weaving platform 1 can be used for three-dimensional weaving in a three-dimensional knitting machine in practice. As shown in FIG. 1, the woven platform 1 includes an annular flat surface 10, an inner ring cylinder group 12, and an outer ring cylinder group 14. The inner ring cylinder group 12 is disposed on the inner circumference of the annular plane 10, and the outer ring cylinder group 14 is disposed on the outer circumference of the annular plane 10.

In the present embodiment, the annular plane 10 is formed by arranging the annular bodies 100 of different radii with respect to an axis. Referring to FIG. 2, FIG. 2 is a partial side view of the annular body 100 of FIG. As shown in Fig. 2, the annular body 100 has a T-shaped spindle groove 1002, and in practice, the spindle groove 1002 can be used to accommodate a spindle of a three-dimensional knitting machine. The spindle grooves 1002 of the respective annular bodies 100 can communicate with each other to form a spindle groove 1000 as shown in FIG. Please note that the spindle slots 1002 of each annular body 100 are evenly distributed on the respective annular bodies, and the number thereof is equivalent to the number of the spindle grooves 1000 formed. In practice, the number is based on the user or The designer's needs are not limited to the specific embodiments set forth in this specification.

The inner ring cylinder group 12 can be aligned with each of the spindle grooves 1000, respectively, and can push the spindles to move outwardly in the spindle slots 1000, wherein the inner ring cylinder groups 12 are each driven in a staggered manner, for example, for example If the inner ring cylinder 12 pushes the spindle at a stage, the inner ring cylinder 12 adjacent to the cylinder 12 does not push the spindle, but in the next stage, the inner ring cylinder 12 that originally pushed the spindle is restored. The position, and the inner ring cylinder 12 that originally did not push the spindle started to push. On the other hand, the outer ring cylinder group 14 can also be aligned with each spindle groove 1000, respectively, and can push the spindle to move in the spindle groove 1000 toward the axis. Similarly, each outer ring cylinder 14 is also urged in a staggered manner. In addition, each inner ring cylinder 12 and each outer ring cylinder 14 are pushed in a corresponding manner, that is, the inner ring cylinder 12 and the outer ring cylinder 14 at both ends of the same spindle groove 1000, only one of which pushes The spindle and the other end of the cylinder return to the original position.

Since the inner ring cylinder 12 and the outer ring cylinder 14 are disposed at opposite ends of the spindle groove 1000, the number of spindles in the spindle groove 1000 must be less than the number of the annular body 100, so that the entire row of spindles can be made. Moving in the spindle groove 1000. In practice, the total number of spindles used can generally be one less than the total number of annular bodies 100 and multiplied by the number of spindle slots 1002 of each annular body 100.

In addition, in the specific embodiment, the innermost ring and the outermost ring of the annular plane 10 of the woven platform 1 are fixed. In practice, the so-called innermost ring and outermost ring may be the innermost layer of the annular plane 10 and the outermost two rings, three rings or more rings, but the stroke of the cylinder push needs to be relatively increased to two. The distance between a spindle, a three spindle or more. In addition, the woven platform 1 may further include a first actuator and a second actuator (not shown), wherein the first actuator may be connected to an odd number of outer rings from the inner circumference of the annular plane 10. The annular body 100 (hereinafter referred to as a first annular body), and the second actuator may be connected to an even number of annular bodies 100 from the inner circumference of the annular plane 10 (hereinafter referred to as a second annular body) )). In addition, in practice, the first annular body may also be an odd number of annular bodies 100 that are inward from the outer circumference of the annular plane 10, and the second annular body may be inward from the outer circumference of the annular plane 10. The even number of annular bodies 100 are not limited to the specific embodiment.

The first actuator can control each of the first annular bodies to rotate in a first direction (eg, clockwise direction), and the second actuator can control each of the second annular bodies to face a second direction opposite to the first direction Rotation (e.g., counterclockwise) causes one of the spindle slots 1002, which is originally on a spindle groove 1000, to move to the adjacent spindle groove 1000, while the spindle grooves 1000 on the annular plane 10 remain In a straight line. Furthermore, the first actuator and the second actuator may also control the first annular body and the second annular body to rotate in opposite directions (eg, rotate in a clockwise direction relative to the first annular body and second The annular body rotates in a counterclockwise direction, at which time the first annular body rotates in a counterclockwise direction and the second annular body rotates in a clockwise direction).

Please note that the first actuator and the second actuator are in practice, and may be composed of a screw and a movable slide rail, and the first annular body and the second ring may be controlled by driving the screw and the slide rail by the driving device. The shape rotates. On the other hand, since the movement of each annular body needs to be moved to the positioning at each stage, if the movement of the control movement is not accurate, the accumulated displacement error will cause the problem of misalignment. Therefore, in practice, A positioning unit is disposed on the first actuator and the second actuator to ensure that the first annular body and the second annular body are rotated to be positioned.

The rotation of the above-mentioned annular body and the action of pushing the spindle with the inner ring cylinder and the outer ring cylinder can be performed interactively. For example, after the first actuator and the second actuator control the first annular body and the second annular body to rotate to the positioning, each inner ring cylinder and each outer ring cylinder pushes the spindle, and then pushes the spindle After the first actuator and the second actuator, the first annular body and the second annular body are further controlled to perform reverse rotation, and the above cycle is continued.

Please refer to FIG. 3, which is a schematic diagram showing an example of the travel path of the spindle in the annular body of FIG. 1 and the operation of the cylinder. As shown in FIG. 3, the annular plane 10 can be represented by a determinant block, wherein each column represents a different annular body 100, and each row represents a different spindle groove 1000. Please note that in order to facilitate the representation of the path of the flow, FIG. 3 directly represents each spindle groove 1000 in adjacent rows. However, in practice, each spindle groove 1000 may have a certain interval as described in the above specific embodiment. .

As shown in FIG. 3, the spindle initially located on the first annular body is movable along the path 20, and on the other hand, the spindle originally located on the second annular body is movable along the path 22. Thereby, if one end of the elastic thread or the fiber is wound around each spindle and the other end is fixed, one end of each elastic thread or fiber can be entangled with the movement of the spindle to further form a three-dimensional braid.

According to another embodiment, the three-dimensional knitting machine of the present invention can be used for three-dimensional knitting using the above-described woven platform. The three-dimensional knitting machine of this embodiment may include the woven platform, the concentrating device, and the plurality of spindles of the above-described embodiments, wherein the annular groove of the woven platform is used to accommodate the spindle. As previously mentioned, the number of spindles is related to the number of annular bodies that make up the annular plane and the number of spindle grooves. Further, the line concentrating device is disposed on one side of the annular plane and on its axis.

One or more strands (which may be elastic threads or fibers of any material) may be wound around the spindle, and the other end may be wound around the collecting point of the line concentrating device. According to the action of the woven platform described in the above specific embodiments, each line segment can be entangled with each other as the respective spindles move to form a tubular three-dimensional braid. Since the respective spindles are interactively moved on the annular plane, the fibers of the tubular three-dimensional braid structure woven by the three-dimensional knitting machine of the present embodiment are interlaced in both the tube surface and the thickness direction.

Since the segments are entangled with each other during weaving, the longer the weaving is performed, the more tension the segments will receive, and the length of the inner and outer loops varies depending on the slope of the threads due to the line-up relationship. The tension is changed, or the yarn is twisted or even broken due to the length of each yarn. In order to maintain the line segment from breaking due to excessive tension, and in order to maintain the smoothness of the weaving process, elastic lines can be used in each line segment to avoid breakage caused by tension. Other devices can be used for the purpose. In addition, the line point of the line concentrating device can also move along the axis line in practice, thereby relieving the tension of the line segment.

Referring to Figure 4, Figure 4 is a schematic view of a spindle 3 in accordance with another embodiment of the present invention. As shown in Fig. 4, the spindle 3 has a spindle base 30 and a shackle 32, wherein the shackle 32 is disposed above the spindle base 30, and the shackle 32 can be used to wind one end of the line segment. In practice, the shackle 32 can be, but is not limited to, made of metal.

In the present embodiment, the spindle base 30 can be received in the spindle slot and the spindle groove of the above-described embodiments and can be pushed by the inner or outer ring cylinder to move in the spindle groove. Since the spindle base 30 is rubbed against the spindle groove when moving, considering the wear resistance and the self-lubricating property, as in practice, a nylon material may be used to constitute the spindle base 30, and in addition, around the spindle groove Nylon material can also be used to make the self-lubricating effect better, and other self-lubricating materials such as Teflon can also be used.

On the other hand, since the wire segment is subjected to tension to pull the spindle 3 out of the annular plane during the knitting process, the spindle base 30 needs to be accommodated in the T-shaped spindle groove and its size is larger than the T-shaped spindle groove. The opening can be fixed in the groove of the spindle without being separated from the annular plane due to the tension of the line segment.

Compared with the prior art, the knitting platform of the present invention and the three-dimensional knitting machine using the same can include an annular body and a spindle groove disposed on the annular body, and can be alternately rotated by the annular body and interlaced by the cylinder block. Push the action to make the spindles move in a staggered manner. One end of each line segment may be wound around each spindle and the other end thereof may be wound around a line point of the three-dimensional knitting machine, and each line segment is alternately wound for three-dimensional knitting by staggering movement of the respective spindles. By moving the spindle on the annular plane, the braid woven by the three-dimensional knitting machine of the present invention is a tubular structure of three-dimensional fiber structure, which can solve the problem that the prior art cannot manufacture the three-dimensional tubular braid.

The features and spirit of the present invention will be more apparent from the detailed description of the preferred embodiments. On the contrary, the intention is to cover various modifications and equivalents within the scope of the invention as claimed.

1. . . Weaving platform

10. . . Annular plane

12. . . Inner ring cylinder

14. . . Outer ring cylinder

100. . . Ring

1000. . . Spindle groove

1002. . . Spindle slot

20, 22. . . path

3. . . Spindle

30. . . Spindle base

32. . . Hook and loop

1 is a schematic view of a woven platform in accordance with an embodiment of the present invention.

Figure 2 is a partial side elevational view of the annular body of Figure 1.

Figure 3 is a schematic diagram showing the path of the spindle in the annular body of Figure 1 and the action of the cylinder during operation.

Figure 4 is a schematic illustration of a spindle in accordance with another embodiment of the present invention.

1. . . Weaving platform

10. . . Annular plane

12. . . First cylinder

14. . . Second cylinder

100. . . Ring

1000. . . Spindle groove

Claims (9)

A woven platform for a three-dimensional knitting machine, comprising: N annular bodies, which are composed of a plurality of odd-numbered ring bodies and a plurality of even-numbered ring bodies, and the rings have different radii respectively, and The annular systems are arranged to form an annular plane with respect to a central axis, wherein N is a positive integer, and each annular body comprises: M spindle slots formed on the side of the annular body. a plurality of spindles for respectively accommodating the three-dimensional knitting machine, wherein the spindle slots of the two adjacent annular bodies are in communication with each other to form a groove extending through the one of the N annular bodies in the annular plane And the M spindle grooves formed by the M spindle grooves are radially radial with respect to the axis, and M is a positive integer; M inner ring cylinders are respectively disposed on An inner ring side of the annular plane, and each inner ring cylinder is aligned with a spindle groove, wherein the M inner ring cylinders push the plurality of spindles of the three-dimensional knitting machine in a staggered manner, such that The spindle moves outwardly in the groove of the spindle; M outer ring cylinders are respectively disposed on the ring a planar outer ring side, and each outer ring cylinder is aligned with a spindle groove, wherein the M outer ring cylinders push the plurality of spindles in a staggered manner relative to the M inner ring cylinders, such that The spindle moves inwardly in the groove of the spindle; a first actuator connecting the odd rings of the N annular bodies a body for controlling the odd-numbered annular bodies to rotate at an angle in a clockwise direction or a counterclockwise direction; and a second actuator connecting the even-numbered annular bodies of the N annular bodies for The even-numbered annular bodies are controlled such that the even-numbered annular bodies rotate the angle in the counterclockwise or clockwise direction relative to the odd-numbered annular bodies. The woven platform of claim 1, wherein each of the spindle slots is a T-shaped groove. The woven platform of claim 1, further comprising a driving device coupled to the first actuator for driving the first actuator. The woven platform of claim 1, further comprising a driving device coupled to the second actuator for driving the second actuator control. The woven platform of claim 1, further comprising a positioning unit connecting the first actuator and the second actuator for adjusting the first actuator and the second actuator control The angle of rotation of the rings. The knitting platform according to claim 1, wherein the number of the plurality of spindles is ((N-1)×M), and each spindle comprises: a spindle base, which is accommodated And a shackle disposed on the base of the spindle and projecting from a side of the annular plane for winding a first end of one of the segments. The woven platform of claim 6, further comprising a concentrating device disposed on an axis of the axis and located at a side of the annular plane, wherein the concentrating device has A set of line points on which the axis line moves, the line point being used to wrap the second end of one of the line segments. The woven platform of claim 6, wherein the spindle base is made of a self-lubricating material. The woven platform of claim 6, wherein the shackle is made of metal.