Method for forming fall-plate weave by using groove pin warp knitting machine based on servo driving

Abstract

A method for knitting fall-plate structures on warp-knitting machines, including: the fall-plate guide bar makes an overlap when the groove needle bar is going upward and the previous loop is held by the sinker bar; the groove needle bar and the tongue bar simultaneously go downward but these two items are kept not closed, and the overlapped yarn and the previous loop are slipping inside together; the groove needle bar go upward again while both the fall-plate yarn and the previous loop are held by the sinker bar, making the two yarns slip out of the groove needle. Meanwhile, a ground guide bar makes an overlap, finishing lapping. When moving the groove needle bar downward for a second time, retreating the old loop and the pressed yarn; forming a new loop, by the ground yarn; placing the pressed yarn under the new loop; and forming the fall-plate structures.

Claims

1. A method for forming fall-plate structures by using a grooved needle warp knitting machine, the grooved needle comprising a groove needle bar and a tongue bar; wherein the groove needle bar and the tongue bar are connected to linkage and two servo motors, and the two servo motors respectively and separately control the groove needle bar and the tongue bar, comprising: a. moving the groove needle bar upward for a first time; pressing, by the sinker bar, an old loop; and looping, by a fall-plate guide bar, a pressed yarn around the groove needle, wherein a ground guide bar does not loop a ground yarn around the groove needle, b. moving the groove needle bar and the tongue bar downward for a first time; and placing the pressed yarn and the old loop inside of a needle hook of the groove needle bar, c. moving the groove needle bar upward for a second time; pressing, by the sinker bar, the fall-plate yarn and the previous loop to slip out of the needle hook of the groove needle bar; and looping, by the ground guide bar, the ground yarn around the groove needle, wherein the fall-plate guide bar does not loop the pressed yarn around the groove needle, and d. moving the groove needle bar downward for a second time; closing, by the tongue bar, the needle hook of the groove needle bar, wherein the closed hook includes the ground yarn; retreating the old loop and the pressed yarn from the closed hook; forming, by the ground yarn, a new loop; and placing the pressed yarn under the new loop.

2. The method of claim 1, wherein when moving the groove needle bar upward for the first time, the groove needle bar is moved up before the tongue bar is moved up, and a moving speed of the groove needle bar is greater than a moving speed of the tongue bar.

3. The method of claim 1, wherein when the groove needle bar is moved downward for the second time, the pressed yarn is, by the fall-plate guide bar, placed below the ground yarn.

4. The method of claim 1, wherein a looping direction of the fall-plate guide bar when the groove needle is moved up for the first time and a looping direction of the ground guide bar when the groove needle is moved up for the second time are a same or opposite direction.

5. The method of claim 1, wherein when the groove needle bar is moved up for the first time, the fall-plate guide bar and the ground guide bar move toward an open area of the needle hook of the groove needle bar, pass the open area of the needle hook of the groove needle bar, and the fall-plate guide bar swings and loops the pressed yarn around the groove needle bar.

6. The method of claim 1, wherein when the groove needle bar is moved upward for the second time, the ground guide bar and the fall-plate guide bar move toward an open area of the needle hook of the groove needle bar, pass the open area of the needle hook of the groove needle bar, and the ground guide bar swings and loops the ground yarn around the groove needle bar.

7. The method of claim 1, wherein when the groove needle bar is moved upward for the second time, one course is completed, and a spindle is rotated for one cycle.

Description

BRIEF EXPLANATION OF THE ATTACHED FIGURES

Explanation of the Attached Figures

(1) FIG. 1 will be a schematic diagram of the process that a servo motor will control the groove needle bar through the connecting-rod mechanism.

(2) FIG. 2 will be a schematic diagram of the process that the servo motor will control the tongue bar through the connecting-rod mechanism.

(3) FIG. 3 will be a schematic view of the first time rising process of the groove needle bar in the Embodiment 1.

(4) FIG. 4 will be a schematic view of the process that the groove needle bar is raised for the first time, the fall-plate guide bar will perform the yarn laying before the needle in the Embodiment 1.

(5) FIG. 5 will be a schematic view of the process that the fall-plate guide bar will finish the yarn laying before the needle in the Embodiment 1.

(6) FIG. 6 will be a schematic view of the first time descending process of the groove needle bar in the Embodiment 1.

(7) FIG. 7 will be a schematic view of the second time rising process of the groove needle bar in the Embodiment 1.

(8) FIG. 8 will be a schematic view of the process that the groove needle bar is raised for the second time, the ground guide bar will perform the yarn laying before the needle in the Embodiment 1.

(9) FIG. 9 will be a schematic view of the process that the ground guide bar will finish the yarn laying before the needle in the Embodiment 1.

(10) FIG. 10 will be a schematic view of the second time descending process of the groove needle bar in the Embodiment 1.

(11) In the figure, the serial numbers are: the fall-plate guide bar 1, the ground guide bar 2, the groove needle bar 3, the tongue bar 4, the sinker 5, the pressed yarn 6, and the ground yarn 7.

METHOD FOR THE IMPLEMENTATION OF THE PRESENT INVENTION

(12) In the following, the present invention will be further described in details with reference to the attached figures.

(13) The method for forming the fall-place structure which is described by the present invention will be implemented on the Raschel groove needle warp knitting machine, the groove needle on the warp knitting machine will be composed of the groove needle bar and the tongue bar; the groove needle bar and the tongue bar will be respectively connected with two servo motors through the connecting-rod mechanism, and two servo motors will respectively and separately control the groove needle bar and the tongue bar, as shown in the FIG. 1 and FIG. 2.

Embodiment 1

(14) The ground guide bar 2 and the fall-plate guide bar 1 will perform the yarn laying in the opposite direction; taking the woven fabric which is formed by the combination of the braiding structure and the fall-place structure as an example, the yarn laying quantity of the ground structure is: 0-1/1-0//, the yarn laying quantity of the fall-place structure is: 1-0/1-2//.

(15) FIG. 3FIG. 10 will be the schematic views of the process of utilizing twice rising of the groove needle to finish the yarn laying quantity of the ground structure at 0-1, and the yarn laying quantity of the fall-place structure at 1-0.

(16) Among them, FIG. 3FIG. 6 will be the schematic views about finishing the yarn laying before the needle of the pressed yarn 6.

(17) As shown in the FIG. 3, the groove needle will be raised for the first time to realize the normal retreat from the ring, after that, the tongue bar 4 will start to rise; and the rising speed of the groove needle bar 3 will be greater than the rising speed of the tongue bar 4, so as to open the needle mouth; in order to ensure that the tongue bar 4 will not hinder the retreat from the ring, when the tongue bar 4 is raised to the old loop holding plane, it will be completely sunken in the needle groove on the groove needle bar 3; during the process of the first time rise of the groove needle, the sinker 5 will press against the old loop. As shown in the FIG. 4, when the groove needle bar 3 is raised to a certain height, the fall-plate guide bar 1 and the ground guide bar 2 will swing toward the front of the needle, and swing to the utmost front position; the fall-plate guide bar 1 is prepared to perform the traverse movement before the needle, and the ground guide bar 2 will not move.

(18) As shown in the FIG. 5, the fall-plate guide bar 1 will perform the traverse movement before the needle, finish swinging from the position on the right side of the first needle to the position on the left side, the pressed yarn 6 will finish the yarn laying, and the ground guide bar 2 will swing together with the fall-plate guide bar 1 toward the rear of the needle, the groove needle bar 3 and the tongue bar 4 will descend, and the sinker 5 will move toward the rear.

(19) As shown in the FIG. 6, the groove needle bar 3 and the tongue bar 4 will continue to descend to the lowest point, and remain unclosed all the time; the pressed yarn 6 and the old loop will go together to the needle hook of the groove needle bar 3, and the sinker 5 will move toward the front.

(20) FIG. 7FIG. 10 will be the schematic views of the process of finishing the yarn laying before the needle of the yarn in the weaving chain structure.

(21) As shown in the FIG. 7, the groove needle will be raised for the second time, the old loop and the pressed yarn 6 will be raised with the groove needle bar 3, and the sinker 5 will press against the old loop and the pressed yarn 6; the groove needle bar 3 will be raised, the tongue bar 4 will be raised together with the groove needle bar 3, the needle mouth will remain the open state, the old loop and the pressed yarn 6 will slide together onto the needle bar of the groove needle bar 3.

(22) As shown in the FIG. 8, the groove needle bar 3 will continue to rise until the highest position, the ground guide bar 2 and the fall-plate guide bar 1 will swing forward together, and swing to the utmost front position, the ground guide bar 2 is prepared to perform the traverse movement before the needle, and the fall-plate guide bar 1 will not move.

(23) As shown in the FIG. 9, the ground guide bar 2 will perform the traverse movement before the needle, swing from the left side of the first needle to the right side, opposite to the direction of the traverse movement of the fall-plate guide bar 1, the ground yarn 7 will finish the yarn laying, the fall-plate guide bar 1 will swing together with the ground guide bar 2 toward the rear of the needle, the groove needle bar 3 will start to descend, after descended for a certain distance, the tongue bar 4 will also start to descend, and the sinker 5 will move toward the rear.

(24) At the same time when the groove needle bar 3 descends, the fall-plate guide bar 1 will perform the traverse movement of the needle back, swing from the right side of the first needle to the right side of the second needle.

(25) The descending speed of the tongue bar 4 will be slower than that of the groove needle bar 3, until the needle hook tip of the groove needle bar 3 meets the head end of the tongue bar 4, at this time, the needle mouth will be completely closed, the old loop and the pressed yarn 6 will be looped in the ring, the groove needle bar 3 and the tongue bar 4 will move downward at the same speed.

(26) As shown in the FIG. 10, the old loop and the pressed yarn 6 will exit the ring, the ground yarn 7 will form the new loop, and the pressed yarn 6 will be wound around the bottom part of the new loop to form the fall-place structure.

(27) In the above mentioned process, after twice rising of the groove needle bar 3, the pressed yarn loop will be wound around the base part of the loop, the fall-plate guide bar will perform the traverse movement of the needle back, swing from the right side of the first needle to the right side of the second needle.

(28) After the traverse movement of the needle back is finished, twice rising of the groove needle will be utilized to form the fall-place structure.

(29) In addition, at the time when the yarn pressing comb is performing the yarn laying, it will swing from the left side of the needle to the right side of the needle, and the ground comb will swing from the right side of the needle to the left side of the needle, so as to perform the yarn laying in the opposite direction.

(30) When the groove needle bar rises and descends twice, only one course will be woven, and the spindle will rotate by one cycle.

Embodiment 2

(31) The ground guide bar 2 and the fall-plate guide bar 1 will perform the yarn laying in the same direction; taking the woven fabric which is formed by the combination of the braiding structure and the fall-place structure as an example, the yarn laying quantity of the ground structure is: 0-1/1-0//, the yarn laying quantity of the fall-place structure is: 0-1/2-1//.

(32) Embodiment 2 is to utilize the fall-plate guide bar 1 and the ground guide bar 2 to perform the yarn laying in the same direction for forming the fall-place structure, and the difference from the Embodiment 1 is that the direction of the traverse movement of the fall-plate guide bar 1 when the groove needle bar 3 is raised to the highest position for the first time will be same as the direction of the traverse movement of the ground guide bar 2 when the groove needle bar 3 is raised to the highest position for the second time.